mergestate: merge `preresolve()` into `resolve()`

The separation between `preresolve()` and `resolve()` was something
added for the "merge driver" feature. Since we removed that in
32ce4cbaec4b (mergedriver: delete it, 2020-09-17), we don't need the
separation anymore. More cleanups will follow.

Differential Revision: https://phab.mercurial-scm.org/D11855

mercurial/commands.py

@@ -1,7974 +1,7950 b''
 # commands.py - command processing for mercurial
 #
 # Copyright 2005-2007 Olivia Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import errno
 import os
 import re
 import sys
 
 from .i18n import _
 from .node import (
     hex,
     nullrev,
     short,
     wdirrev,
 )
 from .pycompat import open
 from . import (
     archival,
     bookmarks,
     bundle2,
     bundlecaches,
     changegroup,
     cmdutil,
     copies,
     debugcommands as debugcommandsmod,
     destutil,
     dirstateguard,
     discovery,
     encoding,
     error,
     exchange,
     extensions,
     filemerge,
     formatter,
     graphmod,
     grep as grepmod,
     hbisect,
     help,
     hg,
     logcmdutil,
     merge as mergemod,
     mergestate as mergestatemod,
     narrowspec,
     obsolete,
     obsutil,
     patch,
     phases,
     pycompat,
     rcutil,
     registrar,
     requirements,
     revsetlang,
     rewriteutil,
     scmutil,
     server,
     shelve as shelvemod,
     state as statemod,
     streamclone,
     tags as tagsmod,
     ui as uimod,
     util,
     verify as verifymod,
     vfs as vfsmod,
     wireprotoserver,
 )
 from .utils import (
     dateutil,
     stringutil,
     urlutil,
 )
 
 table = {}
 table.update(debugcommandsmod.command._table)
 
 command = registrar.command(table)
 INTENT_READONLY = registrar.INTENT_READONLY
 
 # common command options
 
 globalopts = [
     (
         b'R',
         b'repository',
         b'',
         _(b'repository root directory or name of overlay bundle file'),
         _(b'REPO'),
     ),
     (b'', b'cwd', b'', _(b'change working directory'), _(b'DIR')),
     (
         b'y',
         b'noninteractive',
         None,
         _(
             b'do not prompt, automatically pick the first choice for all prompts'
         ),
     ),
     (b'q', b'quiet', None, _(b'suppress output')),
     (b'v', b'verbose', None, _(b'enable additional output')),
     (
         b'',
         b'color',
         b'',
         # i18n: 'always', 'auto', 'never', and 'debug' are keywords
         # and should not be translated
         _(b"when to colorize (boolean, always, auto, never, or debug)"),
         _(b'TYPE'),
     ),
     (
         b'',
         b'config',
         [],
         _(b'set/override config option (use \'section.name=value\')'),
         _(b'CONFIG'),
     ),
     (b'', b'debug', None, _(b'enable debugging output')),
     (b'', b'debugger', None, _(b'start debugger')),
     (
         b'',
         b'encoding',
         encoding.encoding,
         _(b'set the charset encoding'),
         _(b'ENCODE'),
     ),
     (
         b'',
         b'encodingmode',
         encoding.encodingmode,
         _(b'set the charset encoding mode'),
         _(b'MODE'),
     ),
     (b'', b'traceback', None, _(b'always print a traceback on exception')),
     (b'', b'time', None, _(b'time how long the command takes')),
     (b'', b'profile', None, _(b'print command execution profile')),
     (b'', b'version', None, _(b'output version information and exit')),
     (b'h', b'help', None, _(b'display help and exit')),
     (b'', b'hidden', False, _(b'consider hidden changesets')),
     (
         b'',
         b'pager',
         b'auto',
         _(b"when to paginate (boolean, always, auto, or never)"),
         _(b'TYPE'),
     ),
 ]
 
 dryrunopts = cmdutil.dryrunopts
 remoteopts = cmdutil.remoteopts
 walkopts = cmdutil.walkopts
 commitopts = cmdutil.commitopts
 commitopts2 = cmdutil.commitopts2
 commitopts3 = cmdutil.commitopts3
 formatteropts = cmdutil.formatteropts
 templateopts = cmdutil.templateopts
 logopts = cmdutil.logopts
 diffopts = cmdutil.diffopts
 diffwsopts = cmdutil.diffwsopts
 diffopts2 = cmdutil.diffopts2
 mergetoolopts = cmdutil.mergetoolopts
 similarityopts = cmdutil.similarityopts
 subrepoopts = cmdutil.subrepoopts
 debugrevlogopts = cmdutil.debugrevlogopts
 
 # Commands start here, listed alphabetically
 
 
 @command(
     b'abort',
     dryrunopts,
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
     helpbasic=True,
 )
 def abort(ui, repo, **opts):
     """abort an unfinished operation (EXPERIMENTAL)
 
     Aborts a multistep operation like graft, histedit, rebase, merge,
     and unshelve if they are in an unfinished state.
 
     use --dry-run/-n to dry run the command.
     """
     dryrun = opts.get('dry_run')
     abortstate = cmdutil.getunfinishedstate(repo)
     if not abortstate:
         raise error.StateError(_(b'no operation in progress'))
     if not abortstate.abortfunc:
         raise error.InputError(
             (
                 _(b"%s in progress but does not support 'hg abort'")
                 % (abortstate._opname)
             ),
             hint=abortstate.hint(),
         )
     if dryrun:
         ui.status(
             _(b'%s in progress, will be aborted\n') % (abortstate._opname)
         )
         return
     return abortstate.abortfunc(ui, repo)
 
 
 @command(
     b'add',
     walkopts + subrepoopts + dryrunopts,
     _(b'[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
     inferrepo=True,
 )
 def add(ui, repo, *pats, **opts):
     """add the specified files on the next commit
 
     Schedule files to be version controlled and added to the
     repository.
 
     The files will be added to the repository at the next commit. To
     undo an add before that, see :hg:`forget`.
 
     If no names are given, add all files to the repository (except
     files matching ``.hgignore``).
 
     .. container:: verbose
 
        Examples:
 
          - New (unknown) files are added
            automatically by :hg:`add`::
 
              $ ls
              foo.c
              $ hg status
              ? foo.c
              $ hg add
              adding foo.c
              $ hg status
              A foo.c
 
          - Specific files to be added can be specified::
 
              $ ls
              bar.c  foo.c
              $ hg status
              ? bar.c
              ? foo.c
              $ hg add bar.c
              $ hg status
              A bar.c
              ? foo.c
 
     Returns 0 if all files are successfully added.
     """
 
     m = scmutil.match(repo[None], pats, pycompat.byteskwargs(opts))
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     rejected = cmdutil.add(ui, repo, m, b"", uipathfn, False, **opts)
     return rejected and 1 or 0
 
 
 @command(
     b'addremove',
     similarityopts + subrepoopts + walkopts + dryrunopts,
     _(b'[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     inferrepo=True,
 )
 def addremove(ui, repo, *pats, **opts):
     """add all new files, delete all missing files
 
     Add all new files and remove all missing files from the
     repository.
 
     Unless names are given, new files are ignored if they match any of
     the patterns in ``.hgignore``. As with add, these changes take
     effect at the next commit.
 
     Use the -s/--similarity option to detect renamed files. This
     option takes a percentage between 0 (disabled) and 100 (files must
     be identical) as its parameter. With a parameter greater than 0,
     this compares every removed file with every added file and records
     those similar enough as renames. Detecting renamed files this way
     can be expensive. After using this option, :hg:`status -C` can be
     used to check which files were identified as moved or renamed. If
     not specified, -s/--similarity defaults to 100 and only renames of
     identical files are detected.
 
     .. container:: verbose
 
        Examples:
 
          - A number of files (bar.c and foo.c) are new,
            while foobar.c has been removed (without using :hg:`remove`)
            from the repository::
 
              $ ls
              bar.c foo.c
              $ hg status
              ! foobar.c
              ? bar.c
              ? foo.c
              $ hg addremove
              adding bar.c
              adding foo.c
              removing foobar.c
              $ hg status
              A bar.c
              A foo.c
              R foobar.c
 
          - A file foobar.c was moved to foo.c without using :hg:`rename`.
            Afterwards, it was edited slightly::
 
              $ ls
              foo.c
              $ hg status
              ! foobar.c
              ? foo.c
              $ hg addremove --similarity 90
              removing foobar.c
              adding foo.c
              recording removal of foobar.c as rename to foo.c (94% similar)
              $ hg status -C
              A foo.c
                foobar.c
              R foobar.c
 
     Returns 0 if all files are successfully added.
     """
     opts = pycompat.byteskwargs(opts)
     if not opts.get(b'similarity'):
         opts[b'similarity'] = b'100'
     matcher = scmutil.match(repo[None], pats, opts)
     relative = scmutil.anypats(pats, opts)
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=relative)
     return scmutil.addremove(repo, matcher, b"", uipathfn, opts)
 
 
 @command(
     b'annotate|blame',
     [
         (b'r', b'rev', b'', _(b'annotate the specified revision'), _(b'REV')),
         (
             b'',
             b'follow',
             None,
             _(b'follow copies/renames and list the filename (DEPRECATED)'),
         ),
         (b'', b'no-follow', None, _(b"don't follow copies and renames")),
         (b'a', b'text', None, _(b'treat all files as text')),
         (b'u', b'user', None, _(b'list the author (long with -v)')),
         (b'f', b'file', None, _(b'list the filename')),
         (b'd', b'date', None, _(b'list the date (short with -q)')),
         (b'n', b'number', None, _(b'list the revision number (default)')),
         (b'c', b'changeset', None, _(b'list the changeset')),
         (
             b'l',
             b'line-number',
             None,
             _(b'show line number at the first appearance'),
         ),
         (
             b'',
             b'skip',
             [],
             _(b'revset to not display (EXPERIMENTAL)'),
             _(b'REV'),
         ),
     ]
     + diffwsopts
     + walkopts
     + formatteropts,
     _(b'[-r REV] [-f] [-a] [-u] [-d] [-n] [-c] [-l] FILE...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     helpbasic=True,
     inferrepo=True,
 )
 def annotate(ui, repo, *pats, **opts):
     """show changeset information by line for each file
 
     List changes in files, showing the revision id responsible for
     each line.
 
     This command is useful for discovering when a change was made and
     by whom.
 
     If you include --file, --user, or --date, the revision number is
     suppressed unless you also include --number.
 
     Without the -a/--text option, annotate will avoid processing files
     it detects as binary. With -a, annotate will annotate the file
     anyway, although the results will probably be neither useful
     nor desirable.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :lines:   List of lines with annotation data.
       :path:    String. Repository-absolute path of the specified file.
 
       And each entry of ``{lines}`` provides the following sub-keywords in
       addition to ``{date}``, ``{node}``, ``{rev}``, ``{user}``, etc.
 
       :line:    String. Line content.
       :lineno:  Integer. Line number at that revision.
       :path:    String. Repository-absolute path of the file at that revision.
 
       See :hg:`help templates.operators` for the list expansion syntax.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     if not pats:
         raise error.InputError(
             _(b'at least one filename or pattern is required')
         )
 
     if opts.get(b'follow'):
         # --follow is deprecated and now just an alias for -f/--file
         # to mimic the behavior of Mercurial before version 1.5
         opts[b'file'] = True
 
     if (
         not opts.get(b'user')
         and not opts.get(b'changeset')
         and not opts.get(b'date')
         and not opts.get(b'file')
     ):
         opts[b'number'] = True
 
     linenumber = opts.get(b'line_number') is not None
     if (
         linenumber
         and (not opts.get(b'changeset'))
         and (not opts.get(b'number'))
     ):
         raise error.InputError(_(b'at least one of -n/-c is required for -l'))
 
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
     ctx = logcmdutil.revsingle(repo, rev)
 
     ui.pager(b'annotate')
     rootfm = ui.formatter(b'annotate', opts)
     if ui.debugflag:
         shorthex = pycompat.identity
     else:
 
         def shorthex(h):
             return h[:12]
 
     if ui.quiet:
         datefunc = dateutil.shortdate
     else:
         datefunc = dateutil.datestr
     if ctx.rev() is None:
         if opts.get(b'changeset'):
             # omit "+" suffix which is appended to node hex
             def formatrev(rev):
                 if rev == wdirrev:
                     return b'%d' % ctx.p1().rev()
                 else:
                     return b'%d' % rev
 
         else:
 
             def formatrev(rev):
                 if rev == wdirrev:
                     return b'%d+' % ctx.p1().rev()
                 else:
                     return b'%d ' % rev
 
         def formathex(h):
             if h == repo.nodeconstants.wdirhex:
                 return b'%s+' % shorthex(hex(ctx.p1().node()))
             else:
                 return b'%s ' % shorthex(h)
 
     else:
         formatrev = b'%d'.__mod__
         formathex = shorthex
 
     opmap = [
         (b'user', b' ', lambda x: x.fctx.user(), ui.shortuser),
         (b'rev', b' ', lambda x: scmutil.intrev(x.fctx), formatrev),
         (b'node', b' ', lambda x: hex(scmutil.binnode(x.fctx)), formathex),
         (b'date', b' ', lambda x: x.fctx.date(), util.cachefunc(datefunc)),
         (b'path', b' ', lambda x: x.fctx.path(), pycompat.bytestr),
         (b'lineno', b':', lambda x: x.lineno, pycompat.bytestr),
     ]
     opnamemap = {
         b'rev': b'number',
         b'node': b'changeset',
         b'path': b'file',
         b'lineno': b'line_number',
     }
 
     if rootfm.isplain():
 
         def makefunc(get, fmt):
             return lambda x: fmt(get(x))
 
     else:
 
         def makefunc(get, fmt):
             return get
 
     datahint = rootfm.datahint()
     funcmap = [
         (makefunc(get, fmt), sep)
         for fn, sep, get, fmt in opmap
         if opts.get(opnamemap.get(fn, fn)) or fn in datahint
     ]
     funcmap[0] = (funcmap[0][0], b'')  # no separator in front of first column
     fields = b' '.join(
         fn
         for fn, sep, get, fmt in opmap
         if opts.get(opnamemap.get(fn, fn)) or fn in datahint
     )
 
     def bad(x, y):
         raise error.InputError(b"%s: %s" % (x, y))
 
     m = scmutil.match(ctx, pats, opts, badfn=bad)
 
     follow = not opts.get(b'no_follow')
     diffopts = patch.difffeatureopts(
         ui, opts, section=b'annotate', whitespace=True
     )
     skiprevs = opts.get(b'skip')
     if skiprevs:
         skiprevs = logcmdutil.revrange(repo, skiprevs)
 
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     for abs in ctx.walk(m):
         fctx = ctx[abs]
         rootfm.startitem()
         rootfm.data(path=abs)
         if not opts.get(b'text') and fctx.isbinary():
             rootfm.plain(_(b"%s: binary file\n") % uipathfn(abs))
             continue
 
         fm = rootfm.nested(b'lines', tmpl=b'{rev}: {line}')
         lines = fctx.annotate(
             follow=follow, skiprevs=skiprevs, diffopts=diffopts
         )
         if not lines:
             fm.end()
             continue
         formats = []
         pieces = []
 
         for f, sep in funcmap:
             l = [f(n) for n in lines]
             if fm.isplain():
                 sizes = [encoding.colwidth(x) for x in l]
                 ml = max(sizes)
                 formats.append([sep + b' ' * (ml - w) + b'%s' for w in sizes])
             else:
                 formats.append([b'%s'] * len(l))
             pieces.append(l)
 
         for f, p, n in zip(zip(*formats), zip(*pieces), lines):
             fm.startitem()
             fm.context(fctx=n.fctx)
             fm.write(fields, b"".join(f), *p)
             if n.skip:
                 fmt = b"* %s"
             else:
                 fmt = b": %s"
             fm.write(b'line', fmt, n.text)
 
         if not lines[-1].text.endswith(b'\n'):
             fm.plain(b'\n')
         fm.end()
 
     rootfm.end()
 
 
 @command(
     b'archive',
     [
         (b'', b'no-decode', None, _(b'do not pass files through decoders')),
         (
             b'p',
             b'prefix',
             b'',
             _(b'directory prefix for files in archive'),
             _(b'PREFIX'),
         ),
         (b'r', b'rev', b'', _(b'revision to distribute'), _(b'REV')),
         (b't', b'type', b'', _(b'type of distribution to create'), _(b'TYPE')),
     ]
     + subrepoopts
     + walkopts,
     _(b'[OPTION]... DEST'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def archive(ui, repo, dest, **opts):
     """create an unversioned archive of a repository revision
 
     By default, the revision used is the parent of the working
     directory; use -r/--rev to specify a different revision.
 
     The archive type is automatically detected based on file
     extension (to override, use -t/--type).
 
     .. container:: verbose
 
       Examples:
 
       - create a zip file containing the 1.0 release::
 
           hg archive -r 1.0 project-1.0.zip
 
       - create a tarball excluding .hg files::
 
           hg archive project.tar.gz -X ".hg*"
 
     Valid types are:
 
     :``files``: a directory full of files (default)
     :``tar``:   tar archive, uncompressed
     :``tbz2``:  tar archive, compressed using bzip2
     :``tgz``:   tar archive, compressed using gzip
     :``txz``:   tar archive, compressed using lzma (only in Python 3)
     :``uzip``:  zip archive, uncompressed
     :``zip``:   zip archive, compressed using deflate
 
     The exact name of the destination archive or directory is given
     using a format string; see :hg:`help export` for details.
 
     Each member added to an archive file has a directory prefix
     prepended. Use -p/--prefix to specify a format string for the
     prefix. The default is the basename of the archive, with suffixes
     removed.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
     ctx = logcmdutil.revsingle(repo, rev)
     if not ctx:
         raise error.InputError(
             _(b'no working directory: please specify a revision')
         )
     node = ctx.node()
     dest = cmdutil.makefilename(ctx, dest)
     if os.path.realpath(dest) == repo.root:
         raise error.InputError(_(b'repository root cannot be destination'))
 
     kind = opts.get(b'type') or archival.guesskind(dest) or b'files'
     prefix = opts.get(b'prefix')
 
     if dest == b'-':
         if kind == b'files':
             raise error.InputError(_(b'cannot archive plain files to stdout'))
         dest = cmdutil.makefileobj(ctx, dest)
         if not prefix:
             prefix = os.path.basename(repo.root) + b'-%h'
 
     prefix = cmdutil.makefilename(ctx, prefix)
     match = scmutil.match(ctx, [], opts)
     archival.archive(
         repo,
         dest,
         node,
         kind,
         not opts.get(b'no_decode'),
         match,
         prefix,
         subrepos=opts.get(b'subrepos'),
     )
 
 
 @command(
     b'backout',
     [
         (
             b'',
             b'merge',
             None,
             _(b'merge with old dirstate parent after backout'),
         ),
         (
             b'',
             b'commit',
             None,
             _(b'commit if no conflicts were encountered (DEPRECATED)'),
         ),
         (b'', b'no-commit', None, _(b'do not commit')),
         (
             b'',
             b'parent',
             b'',
             _(b'parent to choose when backing out merge (DEPRECATED)'),
             _(b'REV'),
         ),
         (b'r', b'rev', b'', _(b'revision to backout'), _(b'REV')),
         (b'e', b'edit', False, _(b'invoke editor on commit messages')),
     ]
     + mergetoolopts
     + walkopts
     + commitopts
     + commitopts2,
     _(b'[OPTION]... [-r] REV'),
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
 )
 def backout(ui, repo, node=None, rev=None, **opts):
     """reverse effect of earlier changeset
 
     Prepare a new changeset with the effect of REV undone in the
     current working directory. If no conflicts were encountered,
     it will be committed immediately.
 
     If REV is the parent of the working directory, then this new changeset
     is committed automatically (unless --no-commit is specified).
 
     .. note::
 
        :hg:`backout` cannot be used to fix either an unwanted or
        incorrect merge.
 
     .. container:: verbose
 
       Examples:
 
       - Reverse the effect of the parent of the working directory.
         This backout will be committed immediately::
 
           hg backout -r .
 
       - Reverse the effect of previous bad revision 23::
 
           hg backout -r 23
 
       - Reverse the effect of previous bad revision 23 and
         leave changes uncommitted::
 
           hg backout -r 23 --no-commit
           hg commit -m "Backout revision 23"
 
       By default, the pending changeset will have one parent,
       maintaining a linear history. With --merge, the pending
       changeset will instead have two parents: the old parent of the
       working directory and a new child of REV that simply undoes REV.
 
       Before version 1.7, the behavior without --merge was equivalent
       to specifying --merge followed by :hg:`update --clean .` to
       cancel the merge and leave the child of REV as a head to be
       merged separately.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help revert` for a way to restore files to the state
     of another revision.
 
     Returns 0 on success, 1 if nothing to backout or there are unresolved
     files.
     """
     with repo.wlock(), repo.lock():
         return _dobackout(ui, repo, node, rev, **opts)
 
 
 def _dobackout(ui, repo, node=None, rev=None, **opts):
     cmdutil.check_incompatible_arguments(opts, 'no_commit', ['commit', 'merge'])
     opts = pycompat.byteskwargs(opts)
 
     if rev and node:
         raise error.InputError(_(b"please specify just one revision"))
 
     if not rev:
         rev = node
 
     if not rev:
         raise error.InputError(_(b"please specify a revision to backout"))
 
     date = opts.get(b'date')
     if date:
         opts[b'date'] = dateutil.parsedate(date)
 
     cmdutil.checkunfinished(repo)
     cmdutil.bailifchanged(repo)
     ctx = logcmdutil.revsingle(repo, rev)
     node = ctx.node()
 
     op1, op2 = repo.dirstate.parents()
     if not repo.changelog.isancestor(node, op1):
         raise error.InputError(
             _(b'cannot backout change that is not an ancestor')
         )
 
     p1, p2 = repo.changelog.parents(node)
     if p1 == repo.nullid:
         raise error.InputError(_(b'cannot backout a change with no parents'))
     if p2 != repo.nullid:
         if not opts.get(b'parent'):
             raise error.InputError(_(b'cannot backout a merge changeset'))
         p = repo.lookup(opts[b'parent'])
         if p not in (p1, p2):
             raise error.InputError(
                 _(b'%s is not a parent of %s') % (short(p), short(node))
             )
         parent = p
     else:
         if opts.get(b'parent'):
             raise error.InputError(
                 _(b'cannot use --parent on non-merge changeset')
             )
         parent = p1
 
     # the backout should appear on the same branch
     branch = repo.dirstate.branch()
     bheads = repo.branchheads(branch)
     rctx = scmutil.revsingle(repo, hex(parent))
     if not opts.get(b'merge') and op1 != node:
         with dirstateguard.dirstateguard(repo, b'backout'):
             overrides = {(b'ui', b'forcemerge'): opts.get(b'tool', b'')}
             with ui.configoverride(overrides, b'backout'):
                 stats = mergemod.back_out(ctx, parent=repo[parent])
             repo.setparents(op1, op2)
         hg._showstats(repo, stats)
         if stats.unresolvedcount:
             repo.ui.status(
                 _(b"use 'hg resolve' to retry unresolved file merges\n")
             )
             return 1
     else:
         hg.clean(repo, node, show_stats=False)
         repo.dirstate.setbranch(branch)
         cmdutil.revert(ui, repo, rctx)
 
     if opts.get(b'no_commit'):
         msg = _(b"changeset %s backed out, don't forget to commit.\n")
         ui.status(msg % short(node))
         return 0
 
     def commitfunc(ui, repo, message, match, opts):
         editform = b'backout'
         e = cmdutil.getcommiteditor(
             editform=editform, **pycompat.strkwargs(opts)
         )
         if not message:
             # we don't translate commit messages
             message = b"Backed out changeset %s" % short(node)
             e = cmdutil.getcommiteditor(edit=True, editform=editform)
         return repo.commit(
             message, opts.get(b'user'), opts.get(b'date'), match, editor=e
         )
 
     # save to detect changes
     tip = repo.changelog.tip()
 
     newnode = cmdutil.commit(ui, repo, commitfunc, [], opts)
     if not newnode:
         ui.status(_(b"nothing changed\n"))
         return 1
     cmdutil.commitstatus(repo, newnode, branch, bheads, tip)
 
     def nice(node):
         return b'%d:%s' % (repo.changelog.rev(node), short(node))
 
     ui.status(
         _(b'changeset %s backs out changeset %s\n')
         % (nice(newnode), nice(node))
     )
     if opts.get(b'merge') and op1 != node:
         hg.clean(repo, op1, show_stats=False)
         ui.status(_(b'merging with changeset %s\n') % nice(newnode))
         overrides = {(b'ui', b'forcemerge'): opts.get(b'tool', b'')}
         with ui.configoverride(overrides, b'backout'):
             return hg.merge(repo[b'tip'])
     return 0
 
 
 @command(
     b'bisect',
     [
         (b'r', b'reset', False, _(b'reset bisect state')),
         (b'g', b'good', False, _(b'mark changeset good')),
         (b'b', b'bad', False, _(b'mark changeset bad')),
         (b's', b'skip', False, _(b'skip testing changeset')),
         (b'e', b'extend', False, _(b'extend the bisect range')),
         (
             b'c',
             b'command',
             b'',
             _(b'use command to check changeset state'),
             _(b'CMD'),
         ),
         (b'U', b'noupdate', False, _(b'do not update to target')),
     ],
     _(b"[-gbsr] [-U] [-c CMD] [REV]"),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
 )
 def bisect(
     ui,
     repo,
     positional_1=None,
     positional_2=None,
     command=None,
     reset=None,
     good=None,
     bad=None,
     skip=None,
     extend=None,
     noupdate=None,
 ):
     """subdivision search of changesets
 
     This command helps to find changesets which introduce problems. To
     use, mark the earliest changeset you know exhibits the problem as
     bad, then mark the latest changeset which is free from the problem
     as good. Bisect will update your working directory to a revision
     for testing (unless the -U/--noupdate option is specified). Once
     you have performed tests, mark the working directory as good or
     bad, and bisect will either update to another candidate changeset
     or announce that it has found the bad revision.
 
     As a shortcut, you can also use the revision argument to mark a
     revision as good or bad without checking it out first.
 
     If you supply a command, it will be used for automatic bisection.
     The environment variable HG_NODE will contain the ID of the
     changeset being tested. The exit status of the command will be
     used to mark revisions as good or bad: status 0 means good, 125
     means to skip the revision, 127 (command not found) will abort the
     bisection, and any other non-zero exit status means the revision
     is bad.
 
     .. container:: verbose
 
       Some examples:
 
       - start a bisection with known bad revision 34, and good revision 12::
 
           hg bisect --bad 34
           hg bisect --good 12
 
       - advance the current bisection by marking current revision as good or
         bad::
 
           hg bisect --good
           hg bisect --bad
 
       - mark the current revision, or a known revision, to be skipped (e.g. if
         that revision is not usable because of another issue)::
 
           hg bisect --skip
           hg bisect --skip 23
 
       - skip all revisions that do not touch directories ``foo`` or ``bar``::
 
           hg bisect --skip "!( file('path:foo') & file('path:bar') )"
 
       - forget the current bisection::
 
           hg bisect --reset
 
       - use 'make && make tests' to automatically find the first broken
         revision::
 
           hg bisect --reset
           hg bisect --bad 34
           hg bisect --good 12
           hg bisect --command "make && make tests"
 
       - see all changesets whose states are already known in the current
         bisection::
 
           hg log -r "bisect(pruned)"
 
       - see the changeset currently being bisected (especially useful
         if running with -U/--noupdate)::
 
           hg log -r "bisect(current)"
 
       - see all changesets that took part in the current bisection::
 
           hg log -r "bisect(range)"
 
       - you can even get a nice graph::
 
           hg log --graph -r "bisect(range)"
 
       See :hg:`help revisions.bisect` for more about the `bisect()` predicate.
 
     Returns 0 on success.
     """
     rev = []
     # backward compatibility
     if positional_1 in (b"good", b"bad", b"reset", b"init"):
         ui.warn(_(b"(use of 'hg bisect <cmd>' is deprecated)\n"))
         cmd = positional_1
         rev.append(positional_2)
         if cmd == b"good":
             good = True
         elif cmd == b"bad":
             bad = True
         else:
             reset = True
     elif positional_2:
         raise error.InputError(_(b'incompatible arguments'))
     elif positional_1 is not None:
         rev.append(positional_1)
 
     incompatibles = {
         b'--bad': bad,
         b'--command': bool(command),
         b'--extend': extend,
         b'--good': good,
         b'--reset': reset,
         b'--skip': skip,
     }
 
     enabled = [x for x in incompatibles if incompatibles[x]]
 
     if len(enabled) > 1:
         raise error.InputError(
             _(b'%s and %s are incompatible') % tuple(sorted(enabled)[0:2])
         )
 
     if reset:
         hbisect.resetstate(repo)
         return
 
     state = hbisect.load_state(repo)
 
     if rev:
         nodes = [repo[i].node() for i in logcmdutil.revrange(repo, rev)]
     else:
         nodes = [repo.lookup(b'.')]
 
     # update state
     if good or bad or skip:
         if good:
             state[b'good'] += nodes
         elif bad:
             state[b'bad'] += nodes
         elif skip:
             state[b'skip'] += nodes
         hbisect.save_state(repo, state)
         if not (state[b'good'] and state[b'bad']):
             return
 
     def mayupdate(repo, node, show_stats=True):
         """common used update sequence"""
         if noupdate:
             return
         cmdutil.checkunfinished(repo)
         cmdutil.bailifchanged(repo)
         return hg.clean(repo, node, show_stats=show_stats)
 
     displayer = logcmdutil.changesetdisplayer(ui, repo, {})
 
     if command:
         changesets = 1
         if noupdate:
             try:
                 node = state[b'current'][0]
             except LookupError:
                 raise error.StateError(
                     _(
                         b'current bisect revision is unknown - '
                         b'start a new bisect to fix'
                     )
                 )
         else:
             node, p2 = repo.dirstate.parents()
             if p2 != repo.nullid:
                 raise error.StateError(_(b'current bisect revision is a merge'))
         if rev:
             if not nodes:
                 raise error.InputError(_(b'empty revision set'))
             node = repo[nodes[-1]].node()
         with hbisect.restore_state(repo, state, node):
             while changesets:
                 # update state
                 state[b'current'] = [node]
                 hbisect.save_state(repo, state)
                 status = ui.system(
                     command,
                     environ={b'HG_NODE': hex(node)},
                     blockedtag=b'bisect_check',
                 )
                 if status == 125:
                     transition = b"skip"
                 elif status == 0:
                     transition = b"good"
                 # status < 0 means process was killed
                 elif status == 127:
                     raise error.Abort(_(b"failed to execute %s") % command)
                 elif status < 0:
                     raise error.Abort(_(b"%s killed") % command)
                 else:
                     transition = b"bad"
                 state[transition].append(node)
                 ctx = repo[node]
                 summary = cmdutil.format_changeset_summary(ui, ctx, b'bisect')
                 ui.status(_(b'changeset %s: %s\n') % (summary, transition))
                 hbisect.checkstate(state)
                 # bisect
                 nodes, changesets, bgood = hbisect.bisect(repo, state)
                 # update to next check
                 node = nodes[0]
                 mayupdate(repo, node, show_stats=False)
         hbisect.printresult(ui, repo, state, displayer, nodes, bgood)
         return
 
     hbisect.checkstate(state)
 
     # actually bisect
     nodes, changesets, good = hbisect.bisect(repo, state)
     if extend:
         if not changesets:
             extendctx = hbisect.extendrange(repo, state, nodes, good)
             if extendctx is not None:
                 ui.write(
                     _(b"Extending search to changeset %s\n")
                     % cmdutil.format_changeset_summary(ui, extendctx, b'bisect')
                 )
                 state[b'current'] = [extendctx.node()]
                 hbisect.save_state(repo, state)
                 return mayupdate(repo, extendctx.node())
         raise error.StateError(_(b"nothing to extend"))
 
     if changesets == 0:
         hbisect.printresult(ui, repo, state, displayer, nodes, good)
     else:
         assert len(nodes) == 1  # only a single node can be tested next
         node = nodes[0]
         # compute the approximate number of remaining tests
         tests, size = 0, 2
         while size <= changesets:
             tests, size = tests + 1, size * 2
         rev = repo.changelog.rev(node)
         summary = cmdutil.format_changeset_summary(ui, repo[rev], b'bisect')
         ui.write(
             _(
                 b"Testing changeset %s "
                 b"(%d changesets remaining, ~%d tests)\n"
             )
             % (summary, changesets, tests)
         )
         state[b'current'] = [node]
         hbisect.save_state(repo, state)
         return mayupdate(repo, node)
 
 
 @command(
     b'bookmarks|bookmark',
     [
         (b'f', b'force', False, _(b'force')),
         (b'r', b'rev', b'', _(b'revision for bookmark action'), _(b'REV')),
         (b'd', b'delete', False, _(b'delete a given bookmark')),
         (b'm', b'rename', b'', _(b'rename a given bookmark'), _(b'OLD')),
         (b'i', b'inactive', False, _(b'mark a bookmark inactive')),
         (b'l', b'list', False, _(b'list existing bookmarks')),
     ]
     + formatteropts,
     _(b'hg bookmarks [OPTIONS]... [NAME]...'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
 )
 def bookmark(ui, repo, *names, **opts):
     """create a new bookmark or list existing bookmarks
 
     Bookmarks are labels on changesets to help track lines of development.
     Bookmarks are unversioned and can be moved, renamed and deleted.
     Deleting or moving a bookmark has no effect on the associated changesets.
 
     Creating or updating to a bookmark causes it to be marked as 'active'.
     The active bookmark is indicated with a '*'.
     When a commit is made, the active bookmark will advance to the new commit.
     A plain :hg:`update` will also advance an active bookmark, if possible.
     Updating away from a bookmark will cause it to be deactivated.
 
     Bookmarks can be pushed and pulled between repositories (see
     :hg:`help push` and :hg:`help pull`). If a shared bookmark has
     diverged, a new 'divergent bookmark' of the form 'name@path' will
     be created. Using :hg:`merge` will resolve the divergence.
 
     Specifying bookmark as '.' to -m/-d/-l options is equivalent to specifying
     the active bookmark's name.
 
     A bookmark named '@' has the special property that :hg:`clone` will
     check it out by default if it exists.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions such as ``{bookmark}``. See also
       :hg:`help templates`.
 
       :active:  Boolean. True if the bookmark is active.
 
       Examples:
 
       - create an active bookmark for a new line of development::
 
           hg book new-feature
 
       - create an inactive bookmark as a place marker::
 
           hg book -i reviewed
 
       - create an inactive bookmark on another changeset::
 
           hg book -r .^ tested
 
       - rename bookmark turkey to dinner::
 
           hg book -m turkey dinner
 
       - move the '@' bookmark from another branch::
 
           hg book -f @
 
       - print only the active bookmark name::
 
           hg book -ql .
     """
     opts = pycompat.byteskwargs(opts)
     force = opts.get(b'force')
     rev = opts.get(b'rev')
     inactive = opts.get(b'inactive')  # meaning add/rename to inactive bookmark
 
     action = cmdutil.check_at_most_one_arg(opts, b'delete', b'rename', b'list')
     if action:
         cmdutil.check_incompatible_arguments(opts, action, [b'rev'])
     elif names or rev:
         action = b'add'
     elif inactive:
         action = b'inactive'  # meaning deactivate
     else:
         action = b'list'
 
     cmdutil.check_incompatible_arguments(
         opts, b'inactive', [b'delete', b'list']
     )
     if not names and action in {b'add', b'delete'}:
         raise error.InputError(_(b"bookmark name required"))
 
     if action in {b'add', b'delete', b'rename', b'inactive'}:
         with repo.wlock(), repo.lock(), repo.transaction(b'bookmark') as tr:
             if action == b'delete':
                 names = pycompat.maplist(repo._bookmarks.expandname, names)
                 bookmarks.delete(repo, tr, names)
             elif action == b'rename':
                 if not names:
                     raise error.InputError(_(b"new bookmark name required"))
                 elif len(names) > 1:
                     raise error.InputError(
                         _(b"only one new bookmark name allowed")
                     )
                 oldname = repo._bookmarks.expandname(opts[b'rename'])
                 bookmarks.rename(repo, tr, oldname, names[0], force, inactive)
             elif action == b'add':
                 bookmarks.addbookmarks(repo, tr, names, rev, force, inactive)
             elif action == b'inactive':
                 if len(repo._bookmarks) == 0:
                     ui.status(_(b"no bookmarks set\n"))
                 elif not repo._activebookmark:
                     ui.status(_(b"no active bookmark\n"))
                 else:
                     bookmarks.deactivate(repo)
     elif action == b'list':
         names = pycompat.maplist(repo._bookmarks.expandname, names)
         with ui.formatter(b'bookmarks', opts) as fm:
             bookmarks.printbookmarks(ui, repo, fm, names)
     else:
         raise error.ProgrammingError(b'invalid action: %s' % action)
 
 
 @command(
     b'branch',
     [
         (
             b'f',
             b'force',
             None,
             _(b'set branch name even if it shadows an existing branch'),
         ),
         (b'C', b'clean', None, _(b'reset branch name to parent branch name')),
         (
             b'r',
             b'rev',
             [],
             _(b'change branches of the given revs (EXPERIMENTAL)'),
         ),
     ],
     _(b'[-fC] [NAME]'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
 )
 def branch(ui, repo, label=None, **opts):
     """set or show the current branch name
 
     .. note::
 
        Branch names are permanent and global. Use :hg:`bookmark` to create a
        light-weight bookmark instead. See :hg:`help glossary` for more
        information about named branches and bookmarks.
 
     With no argument, show the current branch name. With one argument,
     set the working directory branch name (the branch will not exist
     in the repository until the next commit). Standard practice
     recommends that primary development take place on the 'default'
     branch.
 
     Unless -f/--force is specified, branch will not let you set a
     branch name that already exists.
 
     Use -C/--clean to reset the working directory branch to that of
     the parent of the working directory, negating a previous branch
     change.
 
     Use the command :hg:`update` to switch to an existing branch. Use
     :hg:`commit --close-branch` to mark this branch head as closed.
     When all heads of a branch are closed, the branch will be
     considered closed.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     revs = opts.get(b'rev')
     if label:
         label = label.strip()
 
     if not opts.get(b'clean') and not label:
         if revs:
             raise error.InputError(
                 _(b"no branch name specified for the revisions")
             )
         ui.write(b"%s\n" % repo.dirstate.branch())
         return
 
     with repo.wlock():
         if opts.get(b'clean'):
             label = repo[b'.'].branch()
             repo.dirstate.setbranch(label)
             ui.status(_(b'reset working directory to branch %s\n') % label)
         elif label:
 
             scmutil.checknewlabel(repo, label, b'branch')
             if revs:
                 return cmdutil.changebranch(ui, repo, revs, label, opts)
 
             if not opts.get(b'force') and label in repo.branchmap():
                 if label not in [p.branch() for p in repo[None].parents()]:
                     raise error.InputError(
                         _(b'a branch of the same name already exists'),
                         # i18n: "it" refers to an existing branch
                         hint=_(b"use 'hg update' to switch to it"),
                     )
 
             repo.dirstate.setbranch(label)
             ui.status(_(b'marked working directory as branch %s\n') % label)
 
             # find any open named branches aside from default
             for n, h, t, c in repo.branchmap().iterbranches():
                 if n != b"default" and not c:
                     return 0
             ui.status(
                 _(
                     b'(branches are permanent and global, '
                     b'did you want a bookmark?)\n'
                 )
             )
 
 
 @command(
     b'branches',
     [
         (
             b'a',
             b'active',
             False,
             _(b'show only branches that have unmerged heads (DEPRECATED)'),
         ),
         (b'c', b'closed', False, _(b'show normal and closed branches')),
         (b'r', b'rev', [], _(b'show branch name(s) of the given rev')),
     ]
     + formatteropts,
     _(b'[-c]'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
     intents={INTENT_READONLY},
 )
 def branches(ui, repo, active=False, closed=False, **opts):
     """list repository named branches
 
     List the repository's named branches, indicating which ones are
     inactive. If -c/--closed is specified, also list branches which have
     been marked closed (see :hg:`commit --close-branch`).
 
     Use the command :hg:`update` to switch to an existing branch.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions such as ``{branch}``. See also
       :hg:`help templates`.
 
       :active:  Boolean. True if the branch is active.
       :closed:  Boolean. True if the branch is closed.
       :current: Boolean. True if it is the current branch.
 
     Returns 0.
     """
 
     opts = pycompat.byteskwargs(opts)
     revs = opts.get(b'rev')
     selectedbranches = None
     if revs:
         revs = logcmdutil.revrange(repo, revs)
         getbi = repo.revbranchcache().branchinfo
         selectedbranches = {getbi(r)[0] for r in revs}
 
     ui.pager(b'branches')
     fm = ui.formatter(b'branches', opts)
     hexfunc = fm.hexfunc
 
     allheads = set(repo.heads())
     branches = []
     for tag, heads, tip, isclosed in repo.branchmap().iterbranches():
         if selectedbranches is not None and tag not in selectedbranches:
             continue
         isactive = False
         if not isclosed:
             openheads = set(repo.branchmap().iteropen(heads))
             isactive = bool(openheads & allheads)
         branches.append((tag, repo[tip], isactive, not isclosed))
     branches.sort(key=lambda i: (i[2], i[1].rev(), i[0], i[3]), reverse=True)
 
     for tag, ctx, isactive, isopen in branches:
         if active and not isactive:
             continue
         if isactive:
             label = b'branches.active'
             notice = b''
         elif not isopen:
             if not closed:
                 continue
             label = b'branches.closed'
             notice = _(b' (closed)')
         else:
             label = b'branches.inactive'
             notice = _(b' (inactive)')
         current = tag == repo.dirstate.branch()
         if current:
             label = b'branches.current'
 
         fm.startitem()
         fm.write(b'branch', b'%s', tag, label=label)
         rev = ctx.rev()
         padsize = max(31 - len(b"%d" % rev) - encoding.colwidth(tag), 0)
         fmt = b' ' * padsize + b' %d:%s'
         fm.condwrite(
             not ui.quiet,
             b'rev node',
             fmt,
             rev,
             hexfunc(ctx.node()),
             label=b'log.changeset changeset.%s' % ctx.phasestr(),
         )
         fm.context(ctx=ctx)
         fm.data(active=isactive, closed=not isopen, current=current)
         if not ui.quiet:
             fm.plain(notice)
         fm.plain(b'\n')
     fm.end()
 
 
 @command(
     b'bundle',
     [
         (
             b'f',
             b'force',
             None,
             _(b'run even when the destination is unrelated'),
         ),
         (
             b'r',
             b'rev',
             [],
             _(b'a changeset intended to be added to the destination'),
             _(b'REV'),
         ),
         (
             b'b',
             b'branch',
             [],
             _(b'a specific branch you would like to bundle'),
             _(b'BRANCH'),
         ),
         (
             b'',
             b'base',
             [],
             _(b'a base changeset assumed to be available at the destination'),
             _(b'REV'),
         ),
         (b'a', b'all', None, _(b'bundle all changesets in the repository')),
         (
             b't',
             b'type',
             b'bzip2',
             _(b'bundle compression type to use'),
             _(b'TYPE'),
         ),
     ]
     + remoteopts,
     _(b'[-f] [-t BUNDLESPEC] [-a] [-r REV]... [--base REV]... FILE [DEST]...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def bundle(ui, repo, fname, *dests, **opts):
     """create a bundle file
 
     Generate a bundle file containing data to be transferred to another
     repository.
 
     To create a bundle containing all changesets, use -a/--all
     (or --base null). Otherwise, hg assumes the destination will have
     all the nodes you specify with --base parameters. Otherwise, hg
     will assume the repository has all the nodes in destination, or
     default-push/default if no destination is specified, where destination
     is the repositories you provide through DEST option.
 
     You can change bundle format with the -t/--type option. See
     :hg:`help bundlespec` for documentation on this format. By default,
     the most appropriate format is used and compression defaults to
     bzip2.
 
     The bundle file can then be transferred using conventional means
     and applied to another repository with the unbundle or pull
     command. This is useful when direct push and pull are not
     available or when exporting an entire repository is undesirable.
 
     Applying bundles preserves all changeset contents including
     permissions, copy/rename information, and revision history.
 
     Returns 0 on success, 1 if no changes found.
     """
     opts = pycompat.byteskwargs(opts)
     revs = None
     if b'rev' in opts:
         revstrings = opts[b'rev']
         revs = logcmdutil.revrange(repo, revstrings)
         if revstrings and not revs:
             raise error.InputError(_(b'no commits to bundle'))
 
     bundletype = opts.get(b'type', b'bzip2').lower()
     try:
         bundlespec = bundlecaches.parsebundlespec(
             repo, bundletype, strict=False
         )
     except error.UnsupportedBundleSpecification as e:
         raise error.InputError(
             pycompat.bytestr(e),
             hint=_(b"see 'hg help bundlespec' for supported values for --type"),
         )
     cgversion = bundlespec.contentopts[b"cg.version"]
 
     # Packed bundles are a pseudo bundle format for now.
     if cgversion == b's1':
         raise error.InputError(
             _(b'packed bundles cannot be produced by "hg bundle"'),
             hint=_(b"use 'hg debugcreatestreamclonebundle'"),
         )
 
     if opts.get(b'all'):
         if dests:
             raise error.InputError(
                 _(b"--all is incompatible with specifying destinations")
             )
         if opts.get(b'base'):
             ui.warn(_(b"ignoring --base because --all was specified\n"))
         base = [nullrev]
     else:
         base = logcmdutil.revrange(repo, opts.get(b'base'))
     if cgversion not in changegroup.supportedoutgoingversions(repo):
         raise error.Abort(
             _(b"repository does not support bundle version %s") % cgversion
         )
 
     if base:
         if dests:
             raise error.InputError(
                 _(b"--base is incompatible with specifying destinations")
             )
         common = [repo[rev].node() for rev in base]
         heads = [repo[r].node() for r in revs] if revs else None
         outgoing = discovery.outgoing(repo, common, heads)
         missing = outgoing.missing
         excluded = outgoing.excluded
     else:
         missing = set()
         excluded = set()
         for path in urlutil.get_push_paths(repo, ui, dests):
             other = hg.peer(repo, opts, path.rawloc)
             if revs is not None:
                 hex_revs = [repo[r].hex() for r in revs]
             else:
                 hex_revs = None
             branches = (path.branch, [])
             head_revs, checkout = hg.addbranchrevs(
                 repo, repo, branches, hex_revs
             )
             heads = (
                 head_revs
                 and pycompat.maplist(repo.lookup, head_revs)
                 or head_revs
             )
             outgoing = discovery.findcommonoutgoing(
                 repo,
                 other,
                 onlyheads=heads,
                 force=opts.get(b'force'),
                 portable=True,
             )
             missing.update(outgoing.missing)
             excluded.update(outgoing.excluded)
 
     if not missing:
         scmutil.nochangesfound(ui, repo, not base and excluded)
         return 1
 
     if heads:
         outgoing = discovery.outgoing(
             repo, missingroots=missing, ancestorsof=heads
         )
     else:
         outgoing = discovery.outgoing(repo, missingroots=missing)
     outgoing.excluded = sorted(excluded)
 
     if cgversion == b'01':  # bundle1
         bversion = b'HG10' + bundlespec.wirecompression
         bcompression = None
     elif cgversion in (b'02', b'03'):
         bversion = b'HG20'
         bcompression = bundlespec.wirecompression
     else:
         raise error.ProgrammingError(
             b'bundle: unexpected changegroup version %s' % cgversion
         )
 
     # TODO compression options should be derived from bundlespec parsing.
     # This is a temporary hack to allow adjusting bundle compression
     # level without a) formalizing the bundlespec changes to declare it
     # b) introducing a command flag.
     compopts = {}
     complevel = ui.configint(
         b'experimental', b'bundlecomplevel.' + bundlespec.compression
     )
     if complevel is None:
         complevel = ui.configint(b'experimental', b'bundlecomplevel')
     if complevel is not None:
         compopts[b'level'] = complevel
 
     compthreads = ui.configint(
         b'experimental', b'bundlecompthreads.' + bundlespec.compression
     )
     if compthreads is None:
         compthreads = ui.configint(b'experimental', b'bundlecompthreads')
     if compthreads is not None:
         compopts[b'threads'] = compthreads
 
     # Bundling of obsmarker and phases is optional as not all clients
     # support the necessary features.
     cfg = ui.configbool
     contentopts = {
         b'obsolescence': cfg(b'experimental', b'evolution.bundle-obsmarker'),
         b'obsolescence-mandatory': cfg(
             b'experimental', b'evolution.bundle-obsmarker:mandatory'
         ),
         b'phases': cfg(b'experimental', b'bundle-phases'),
     }
     bundlespec.contentopts.update(contentopts)
 
     bundle2.writenewbundle(
         ui,
         repo,
         b'bundle',
         fname,
         bversion,
         outgoing,
         bundlespec.contentopts,
         compression=bcompression,
         compopts=compopts,
     )
 
 
 @command(
     b'cat',
     [
         (
             b'o',
             b'output',
             b'',
             _(b'print output to file with formatted name'),
             _(b'FORMAT'),
         ),
         (b'r', b'rev', b'', _(b'print the given revision'), _(b'REV')),
         (b'', b'decode', None, _(b'apply any matching decode filter')),
     ]
     + walkopts
     + formatteropts,
     _(b'[OPTION]... FILE...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     inferrepo=True,
     intents={INTENT_READONLY},
 )
 def cat(ui, repo, file1, *pats, **opts):
     """output the current or given revision of files
 
     Print the specified files as they were at the given revision. If
     no revision is given, the parent of the working directory is used.
 
     Output may be to a file, in which case the name of the file is
     given using a template string. See :hg:`help templates`. In addition
     to the common template keywords, the following formatting rules are
     supported:
 
     :``%%``: literal "%" character
     :``%s``: basename of file being printed
     :``%d``: dirname of file being printed, or '.' if in repository root
     :``%p``: root-relative path name of file being printed
     :``%H``: changeset hash (40 hexadecimal digits)
     :``%R``: changeset revision number
     :``%h``: short-form changeset hash (12 hexadecimal digits)
     :``%r``: zero-padded changeset revision number
     :``%b``: basename of the exporting repository
     :``\\``: literal "\\" character
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :data:    String. File content.
       :path:    String. Repository-absolute path of the file.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
     ctx = logcmdutil.revsingle(repo, rev)
     m = scmutil.match(ctx, (file1,) + pats, opts)
     fntemplate = opts.pop(b'output', b'')
     if cmdutil.isstdiofilename(fntemplate):
         fntemplate = b''
 
     if fntemplate:
         fm = formatter.nullformatter(ui, b'cat', opts)
     else:
         ui.pager(b'cat')
         fm = ui.formatter(b'cat', opts)
     with fm:
         return cmdutil.cat(
             ui, repo, ctx, m, fm, fntemplate, b'', **pycompat.strkwargs(opts)
         )
 
 
 @command(
     b'clone',
     [
         (
             b'U',
             b'noupdate',
             None,
             _(
                 b'the clone will include an empty working '
                 b'directory (only a repository)'
             ),
         ),
         (
             b'u',
             b'updaterev',
             b'',
             _(b'revision, tag, or branch to check out'),
             _(b'REV'),
         ),
         (
             b'r',
             b'rev',
             [],
             _(
                 b'do not clone everything, but include this changeset'
                 b' and its ancestors'
             ),
             _(b'REV'),
         ),
         (
             b'b',
             b'branch',
             [],
             _(
                 b'do not clone everything, but include this branch\'s'
                 b' changesets and their ancestors'
             ),
             _(b'BRANCH'),
         ),
         (b'', b'pull', None, _(b'use pull protocol to copy metadata')),
         (b'', b'uncompressed', None, _(b'an alias to --stream (DEPRECATED)')),
         (b'', b'stream', None, _(b'clone with minimal data processing')),
     ]
     + remoteopts,
     _(b'[OPTION]... SOURCE [DEST]'),
     helpcategory=command.CATEGORY_REPO_CREATION,
     helpbasic=True,
     norepo=True,
 )
 def clone(ui, source, dest=None, **opts):
     """make a copy of an existing repository
 
     Create a copy of an existing repository in a new directory.
 
     If no destination directory name is specified, it defaults to the
     basename of the source.
 
     The location of the source is added to the new repository's
     ``.hg/hgrc`` file, as the default to be used for future pulls.
 
     Only local paths and ``ssh://`` URLs are supported as
     destinations. For ``ssh://`` destinations, no working directory or
     ``.hg/hgrc`` will be created on the remote side.
 
     If the source repository has a bookmark called '@' set, that
     revision will be checked out in the new repository by default.
 
     To check out a particular version, use -u/--update, or
     -U/--noupdate to create a clone with no working directory.
 
     To pull only a subset of changesets, specify one or more revisions
     identifiers with -r/--rev or branches with -b/--branch. The
     resulting clone will contain only the specified changesets and
     their ancestors. These options (or 'clone src#rev dest') imply
     --pull, even for local source repositories.
 
     In normal clone mode, the remote normalizes repository data into a common
     exchange format and the receiving end translates this data into its local
     storage format. --stream activates a different clone mode that essentially
     copies repository files from the remote with minimal data processing. This
     significantly reduces the CPU cost of a clone both remotely and locally.
     However, it often increases the transferred data size by 30-40%. This can
     result in substantially faster clones where I/O throughput is plentiful,
     especially for larger repositories. A side-effect of --stream clones is
     that storage settings and requirements on the remote are applied locally:
     a modern client may inherit legacy or inefficient storage used by the
     remote or a legacy Mercurial client may not be able to clone from a
     modern Mercurial remote.
 
     .. note::
 
        Specifying a tag will include the tagged changeset but not the
        changeset containing the tag.
 
     .. container:: verbose
 
       For efficiency, hardlinks are used for cloning whenever the
       source and destination are on the same filesystem (note this
       applies only to the repository data, not to the working
       directory). Some filesystems, such as AFS, implement hardlinking
       incorrectly, but do not report errors. In these cases, use the
       --pull option to avoid hardlinking.
 
       Mercurial will update the working directory to the first applicable
       revision from this list:
 
       a) null if -U or the source repository has no changesets
       b) if -u . and the source repository is local, the first parent of
          the source repository's working directory
       c) the changeset specified with -u (if a branch name, this means the
          latest head of that branch)
       d) the changeset specified with -r
       e) the tipmost head specified with -b
       f) the tipmost head specified with the url#branch source syntax
       g) the revision marked with the '@' bookmark, if present
       h) the tipmost head of the default branch
       i) tip
 
       When cloning from servers that support it, Mercurial may fetch
       pre-generated data from a server-advertised URL or inline from the
       same stream. When this is done, hooks operating on incoming changesets
       and changegroups may fire more than once, once for each pre-generated
       bundle and as well as for any additional remaining data. In addition,
       if an error occurs, the repository may be rolled back to a partial
       clone. This behavior may change in future releases.
       See :hg:`help -e clonebundles` for more.
 
       Examples:
 
       - clone a remote repository to a new directory named hg/::
 
           hg clone https://www.mercurial-scm.org/repo/hg/
 
       - create a lightweight local clone::
 
           hg clone project/ project-feature/
 
       - clone from an absolute path on an ssh server (note double-slash)::
 
           hg clone ssh://user@server//home/projects/alpha/
 
       - do a streaming clone while checking out a specified version::
 
           hg clone --stream http://server/repo -u 1.5
 
       - create a repository without changesets after a particular revision::
 
           hg clone -r 04e544 experimental/ good/
 
       - clone (and track) a particular named branch::
 
           hg clone https://www.mercurial-scm.org/repo/hg/#stable
 
     See :hg:`help urls` for details on specifying URLs.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     cmdutil.check_at_most_one_arg(opts, b'noupdate', b'updaterev')
 
     # --include/--exclude can come from narrow or sparse.
     includepats, excludepats = None, None
 
     # hg.clone() differentiates between None and an empty set. So make sure
     # patterns are sets if narrow is requested without patterns.
     if opts.get(b'narrow'):
         includepats = set()
         excludepats = set()
 
         if opts.get(b'include'):
             includepats = narrowspec.parsepatterns(opts.get(b'include'))
         if opts.get(b'exclude'):
             excludepats = narrowspec.parsepatterns(opts.get(b'exclude'))
 
     r = hg.clone(
         ui,
         opts,
         source,
         dest,
         pull=opts.get(b'pull'),
         stream=opts.get(b'stream') or opts.get(b'uncompressed'),
         revs=opts.get(b'rev'),
         update=opts.get(b'updaterev') or not opts.get(b'noupdate'),
         branch=opts.get(b'branch'),
         shareopts=opts.get(b'shareopts'),
         storeincludepats=includepats,
         storeexcludepats=excludepats,
         depth=opts.get(b'depth') or None,
     )
 
     return r is None
 
 
 @command(
     b'commit|ci',
     [
         (
             b'A',
             b'addremove',
             None,
             _(b'mark new/missing files as added/removed before committing'),
         ),
         (b'', b'close-branch', None, _(b'mark a branch head as closed')),
         (b'', b'amend', None, _(b'amend the parent of the working directory')),
         (b's', b'secret', None, _(b'use the secret phase for committing')),
         (b'e', b'edit', None, _(b'invoke editor on commit messages')),
         (
             b'',
             b'force-close-branch',
             None,
             _(b'forcibly close branch from a non-head changeset (ADVANCED)'),
         ),
         (b'i', b'interactive', None, _(b'use interactive mode')),
     ]
     + walkopts
     + commitopts
     + commitopts2
     + subrepoopts,
     _(b'[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_COMMITTING,
     helpbasic=True,
     inferrepo=True,
 )
 def commit(ui, repo, *pats, **opts):
     """commit the specified files or all outstanding changes
 
     Commit changes to the given files into the repository. Unlike a
     centralized SCM, this operation is a local operation. See
     :hg:`push` for a way to actively distribute your changes.
 
     If a list of files is omitted, all changes reported by :hg:`status`
     will be committed.
 
     If you are committing the result of a merge, do not provide any
     filenames or -I/-X filters.
 
     If no commit message is specified, Mercurial starts your
     configured editor where you can enter a message. In case your
     commit fails, you will find a backup of your message in
     ``.hg/last-message.txt``.
 
     The --close-branch flag can be used to mark the current branch
     head closed. When all heads of a branch are closed, the branch
     will be considered closed and no longer listed.
 
     The --amend flag can be used to amend the parent of the
     working directory with a new commit that contains the changes
     in the parent in addition to those currently reported by :hg:`status`,
     if there are any. The old commit is stored in a backup bundle in
     ``.hg/strip-backup`` (see :hg:`help bundle` and :hg:`help unbundle`
     on how to restore it).
 
     Message, user and date are taken from the amended commit unless
     specified. When a message isn't specified on the command line,
     the editor will open with the message of the amended commit.
 
     It is not possible to amend public changesets (see :hg:`help phases`)
     or changesets that have children.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success, 1 if nothing changed.
 
     .. container:: verbose
 
       Examples:
 
       - commit all files ending in .py::
 
           hg commit --include "set:**.py"
 
       - commit all non-binary files::
 
           hg commit --exclude "set:binary()"
 
       - amend the current commit and set the date to now::
 
           hg commit --amend --date now
     """
     with repo.wlock(), repo.lock():
         return _docommit(ui, repo, *pats, **opts)
 
 
 def _docommit(ui, repo, *pats, **opts):
     if opts.get('interactive'):
         opts.pop('interactive')
         ret = cmdutil.dorecord(
             ui, repo, commit, None, False, cmdutil.recordfilter, *pats, **opts
         )
         # ret can be 0 (no changes to record) or the value returned by
         # commit(), 1 if nothing changed or None on success.
         return 1 if ret == 0 else ret
 
     if opts.get('subrepos'):
         cmdutil.check_incompatible_arguments(opts, 'subrepos', ['amend'])
         # Let --subrepos on the command line override config setting.
         ui.setconfig(b'ui', b'commitsubrepos', True, b'commit')
 
     cmdutil.checkunfinished(repo, commit=True)
 
     branch = repo[None].branch()
     bheads = repo.branchheads(branch)
     tip = repo.changelog.tip()
 
     extra = {}
     if opts.get('close_branch') or opts.get('force_close_branch'):
         extra[b'close'] = b'1'
 
         if repo[b'.'].closesbranch():
             raise error.InputError(
                 _(b'current revision is already a branch closing head')
             )
         elif not bheads:
             raise error.InputError(
                 _(b'branch "%s" has no heads to close') % branch
             )
         elif (
             branch == repo[b'.'].branch()
             and repo[b'.'].node() not in bheads
             and not opts.get('force_close_branch')
         ):
             hint = _(
                 b'use --force-close-branch to close branch from a non-head'
                 b' changeset'
             )
             raise error.InputError(_(b'can only close branch heads'), hint=hint)
         elif opts.get('amend'):
             if (
                 repo[b'.'].p1().branch() != branch
                 and repo[b'.'].p2().branch() != branch
             ):
                 raise error.InputError(_(b'can only close branch heads'))
 
     if opts.get('amend'):
         if ui.configbool(b'ui', b'commitsubrepos'):
             raise error.InputError(
                 _(b'cannot amend with ui.commitsubrepos enabled')
             )
 
         old = repo[b'.']
         rewriteutil.precheck(repo, [old.rev()], b'amend')
 
         # Currently histedit gets confused if an amend happens while histedit
         # is in progress. Since we have a checkunfinished command, we are
         # temporarily honoring it.
         #
         # Note: eventually this guard will be removed. Please do not expect
         # this behavior to remain.
         if not obsolete.isenabled(repo, obsolete.createmarkersopt):
             cmdutil.checkunfinished(repo)
 
         node = cmdutil.amend(ui, repo, old, extra, pats, opts)
         opts = pycompat.byteskwargs(opts)
         if node == old.node():
             ui.status(_(b"nothing changed\n"))
             return 1
     else:
 
         def commitfunc(ui, repo, message, match, opts):
             overrides = {}
             if opts.get(b'secret'):
                 overrides[(b'phases', b'new-commit')] = b'secret'
 
             baseui = repo.baseui
             with baseui.configoverride(overrides, b'commit'):
                 with ui.configoverride(overrides, b'commit'):
                     editform = cmdutil.mergeeditform(
                         repo[None], b'commit.normal'
                     )
                     editor = cmdutil.getcommiteditor(
                         editform=editform, **pycompat.strkwargs(opts)
                     )
                     return repo.commit(
                         message,
                         opts.get(b'user'),
                         opts.get(b'date'),
                         match,
                         editor=editor,
                         extra=extra,
                     )
 
         opts = pycompat.byteskwargs(opts)
         node = cmdutil.commit(ui, repo, commitfunc, pats, opts)
 
         if not node:
             stat = cmdutil.postcommitstatus(repo, pats, opts)
             if stat.deleted:
                 ui.status(
                     _(
                         b"nothing changed (%d missing files, see "
                         b"'hg status')\n"
                     )
                     % len(stat.deleted)
                 )
             else:
                 ui.status(_(b"nothing changed\n"))
             return 1
 
     cmdutil.commitstatus(repo, node, branch, bheads, tip, opts)
 
     if not ui.quiet and ui.configbool(b'commands', b'commit.post-status'):
         status(
             ui,
             repo,
             modified=True,
             added=True,
             removed=True,
             deleted=True,
             unknown=True,
             subrepos=opts.get(b'subrepos'),
         )
 
 
 @command(
     b'config|showconfig|debugconfig',
     [
         (b'u', b'untrusted', None, _(b'show untrusted configuration options')),
         # This is experimental because we need
         # * reasonable behavior around aliases,
         # * decide if we display [debug] [experimental] and [devel] section par
         #   default
         # * some way to display "generic" config entry (the one matching
         #   regexp,
         # * proper display of the different value type
         # * a better way to handle <DYNAMIC> values (and variable types),
         # * maybe some type information ?
         (
             b'',
             b'exp-all-known',
             None,
             _(b'show all known config option (EXPERIMENTAL)'),
         ),
         (b'e', b'edit', None, _(b'edit user config')),
         (b'l', b'local', None, _(b'edit repository config')),
         (b'', b'source', None, _(b'show source of configuration value')),
         (
             b'',
             b'shared',
             None,
             _(b'edit shared source repository config (EXPERIMENTAL)'),
         ),
         (b'', b'non-shared', None, _(b'edit non shared config (EXPERIMENTAL)')),
         (b'g', b'global', None, _(b'edit global config')),
     ]
     + formatteropts,
     _(b'[-u] [NAME]...'),
     helpcategory=command.CATEGORY_HELP,
     optionalrepo=True,
     intents={INTENT_READONLY},
 )
 def config(ui, repo, *values, **opts):
     """show combined config settings from all hgrc files
 
     With no arguments, print names and values of all config items.
 
     With one argument of the form section.name, print just the value
     of that config item.
 
     With multiple arguments, print names and values of all config
     items with matching section names or section.names.
 
     With --edit, start an editor on the user-level config file. With
     --global, edit the system-wide config file. With --local, edit the
     repository-level config file.
 
     With --source, the source (filename and line number) is printed
     for each config item.
 
     See :hg:`help config` for more information about config files.
 
     .. container:: verbose
 
       --non-shared flag is used to edit `.hg/hgrc-not-shared` config file.
       This file is not shared across shares when in share-safe mode.
 
       Template:
 
       The following keywords are supported. See also :hg:`help templates`.
 
       :name:    String. Config name.
       :source:  String. Filename and line number where the item is defined.
       :value:   String. Config value.
 
       The --shared flag can be used to edit the config file of shared source
       repository. It only works when you have shared using the experimental
       share safe feature.
 
     Returns 0 on success, 1 if NAME does not exist.
 
     """
 
     opts = pycompat.byteskwargs(opts)
     editopts = (b'edit', b'local', b'global', b'shared', b'non_shared')
     if any(opts.get(o) for o in editopts):
         cmdutil.check_at_most_one_arg(opts, *editopts[1:])
         if opts.get(b'local'):
             if not repo:
                 raise error.InputError(
                     _(b"can't use --local outside a repository")
                 )
             paths = [repo.vfs.join(b'hgrc')]
         elif opts.get(b'global'):
             paths = rcutil.systemrcpath()
         elif opts.get(b'shared'):
             if not repo.shared():
                 raise error.InputError(
                     _(b"repository is not shared; can't use --shared")
                 )
             if requirements.SHARESAFE_REQUIREMENT not in repo.requirements:
                 raise error.InputError(
                     _(
                         b"share safe feature not enabled; "
                         b"unable to edit shared source repository config"
                     )
                 )
             paths = [vfsmod.vfs(repo.sharedpath).join(b'hgrc')]
         elif opts.get(b'non_shared'):
             paths = [repo.vfs.join(b'hgrc-not-shared')]
         else:
             paths = rcutil.userrcpath()
 
         for f in paths:
             if os.path.exists(f):
                 break
         else:
             if opts.get(b'global'):
                 samplehgrc = uimod.samplehgrcs[b'global']
             elif opts.get(b'local'):
                 samplehgrc = uimod.samplehgrcs[b'local']
             else:
                 samplehgrc = uimod.samplehgrcs[b'user']
 
             f = paths[0]
             fp = open(f, b"wb")
             fp.write(util.tonativeeol(samplehgrc))
             fp.close()
 
         editor = ui.geteditor()
         ui.system(
             b"%s \"%s\"" % (editor, f),
             onerr=error.InputError,
             errprefix=_(b"edit failed"),
             blockedtag=b'config_edit',
         )
         return
     ui.pager(b'config')
     fm = ui.formatter(b'config', opts)
     for t, f in rcutil.rccomponents():
         if t == b'path':
             ui.debug(b'read config from: %s\n' % f)
         elif t == b'resource':
             ui.debug(b'read config from: resource:%s.%s\n' % (f[0], f[1]))
         elif t == b'items':
             # Don't print anything for 'items'.
             pass
         else:
             raise error.ProgrammingError(b'unknown rctype: %s' % t)
     untrusted = bool(opts.get(b'untrusted'))
 
     selsections = selentries = []
     if values:
         selsections = [v for v in values if b'.' not in v]
         selentries = [v for v in values if b'.' in v]
     uniquesel = len(selentries) == 1 and not selsections
     selsections = set(selsections)
     selentries = set(selentries)
 
     matched = False
     all_known = opts[b'exp_all_known']
     show_source = ui.debugflag or opts.get(b'source')
     entries = ui.walkconfig(untrusted=untrusted, all_known=all_known)
     for section, name, value in entries:
         source = ui.configsource(section, name, untrusted)
         value = pycompat.bytestr(value)
         defaultvalue = ui.configdefault(section, name)
         if fm.isplain():
             source = source or b'none'
             value = value.replace(b'\n', b'\\n')
         entryname = section + b'.' + name
         if values and not (section in selsections or entryname in selentries):
             continue
         fm.startitem()
         fm.condwrite(show_source, b'source', b'%s: ', source)
         if uniquesel:
             fm.data(name=entryname)
             fm.write(b'value', b'%s\n', value)
         else:
             fm.write(b'name value', b'%s=%s\n', entryname, value)
         if formatter.isprintable(defaultvalue):
             fm.data(defaultvalue=defaultvalue)
         elif isinstance(defaultvalue, list) and all(
             formatter.isprintable(e) for e in defaultvalue
         ):
             fm.data(defaultvalue=fm.formatlist(defaultvalue, name=b'value'))
         # TODO: no idea how to process unsupported defaultvalue types
         matched = True
     fm.end()
     if matched:
         return 0
     return 1
 
 
 @command(
     b'continue',
     dryrunopts,
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
     helpbasic=True,
 )
 def continuecmd(ui, repo, **opts):
     """resumes an interrupted operation (EXPERIMENTAL)
 
     Finishes a multistep operation like graft, histedit, rebase, merge,
     and unshelve if they are in an interrupted state.
 
     use --dry-run/-n to dry run the command.
     """
     dryrun = opts.get('dry_run')
     contstate = cmdutil.getunfinishedstate(repo)
     if not contstate:
         raise error.StateError(_(b'no operation in progress'))
     if not contstate.continuefunc:
         raise error.StateError(
             (
                 _(b"%s in progress but does not support 'hg continue'")
                 % (contstate._opname)
             ),
             hint=contstate.continuemsg(),
         )
     if dryrun:
         ui.status(_(b'%s in progress, will be resumed\n') % (contstate._opname))
         return
     return contstate.continuefunc(ui, repo)
 
 
 @command(
     b'copy|cp',
     [
         (b'', b'forget', None, _(b'unmark a destination file as copied')),
         (b'A', b'after', None, _(b'record a copy that has already occurred')),
         (
             b'',
             b'at-rev',
             b'',
             _(b'(un)mark copies in the given revision (EXPERIMENTAL)'),
             _(b'REV'),
         ),
         (
             b'f',
             b'force',
             None,
             _(b'forcibly copy over an existing managed file'),
         ),
     ]
     + walkopts
     + dryrunopts,
     _(b'[OPTION]... (SOURCE... DEST | --forget DEST...)'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
 )
 def copy(ui, repo, *pats, **opts):
     """mark files as copied for the next commit
 
     Mark dest as having copies of source files. If dest is a
     directory, copies are put in that directory. If dest is a file,
     the source must be a single file.
 
     By default, this command copies the contents of files as they
     exist in the working directory. If invoked with -A/--after, the
     operation is recorded, but no copying is performed.
 
     To undo marking a destination file as copied, use --forget. With that
     option, all given (positional) arguments are unmarked as copies. The
     destination file(s) will be left in place (still tracked). Note that
     :hg:`copy --forget` behaves the same way as :hg:`rename --forget`.
 
     This command takes effect with the next commit by default.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     opts = pycompat.byteskwargs(opts)
     with repo.wlock():
         return cmdutil.copy(ui, repo, pats, opts)
 
 
 @command(
     b'debugcommands',
     [],
     _(b'[COMMAND]'),
     helpcategory=command.CATEGORY_HELP,
     norepo=True,
 )
 def debugcommands(ui, cmd=b'', *args):
     """list all available commands and options"""
     for cmd, vals in sorted(pycompat.iteritems(table)):
         cmd = cmd.split(b'|')[0]
         opts = b', '.join([i[1] for i in vals[1]])
         ui.write(b'%s: %s\n' % (cmd, opts))
 
 
 @command(
     b'debugcomplete',
     [(b'o', b'options', None, _(b'show the command options'))],
     _(b'[-o] CMD'),
     helpcategory=command.CATEGORY_HELP,
     norepo=True,
 )
 def debugcomplete(ui, cmd=b'', **opts):
     """returns the completion list associated with the given command"""
 
     if opts.get('options'):
         options = []
         otables = [globalopts]
         if cmd:
             aliases, entry = cmdutil.findcmd(cmd, table, False)
             otables.append(entry[1])
         for t in otables:
             for o in t:
                 if b"(DEPRECATED)" in o[3]:
                     continue
                 if o[0]:
                     options.append(b'-%s' % o[0])
                 options.append(b'--%s' % o[1])
         ui.write(b"%s\n" % b"\n".join(options))
         return
 
     cmdlist, unused_allcmds = cmdutil.findpossible(cmd, table)
     if ui.verbose:
         cmdlist = [b' '.join(c[0]) for c in cmdlist.values()]
     ui.write(b"%s\n" % b"\n".join(sorted(cmdlist)))
 
 
 @command(
     b'diff',
     [
         (b'r', b'rev', [], _(b'revision (DEPRECATED)'), _(b'REV')),
         (b'', b'from', b'', _(b'revision to diff from'), _(b'REV1')),
         (b'', b'to', b'', _(b'revision to diff to'), _(b'REV2')),
         (b'c', b'change', b'', _(b'change made by revision'), _(b'REV')),
     ]
     + diffopts
     + diffopts2
     + walkopts
     + subrepoopts,
     _(b'[OPTION]... ([-c REV] | [--from REV1] [--to REV2]) [FILE]...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     helpbasic=True,
     inferrepo=True,
     intents={INTENT_READONLY},
 )
 def diff(ui, repo, *pats, **opts):
     """diff repository (or selected files)
 
     Show differences between revisions for the specified files.
 
     Differences between files are shown using the unified diff format.
 
     .. note::
 
        :hg:`diff` may generate unexpected results for merges, as it will
        default to comparing against the working directory's first
        parent changeset if no revisions are specified.
 
     By default, the working directory files are compared to its first parent. To
     see the differences from another revision, use --from. To see the difference
     to another revision, use --to. For example, :hg:`diff --from .^` will show
     the differences from the working copy's grandparent to the working copy,
     :hg:`diff --to .` will show the diff from the working copy to its parent
     (i.e. the reverse of the default), and :hg:`diff --from 1.0 --to 1.2` will
     show the diff between those two revisions.
 
     Alternatively you can specify -c/--change with a revision to see the changes
     in that changeset relative to its first parent (i.e. :hg:`diff -c 42` is
     equivalent to :hg:`diff --from 42^ --to 42`)
 
     Without the -a/--text option, diff will avoid generating diffs of
     files it detects as binary. With -a, diff will generate a diff
     anyway, probably with undesirable results.
 
     Use the -g/--git option to generate diffs in the git extended diff
     format. For more information, read :hg:`help diffs`.
 
     .. container:: verbose
 
       Examples:
 
       - compare a file in the current working directory to its parent::
 
           hg diff foo.c
 
       - compare two historical versions of a directory, with rename info::
 
           hg diff --git --from 1.0 --to 1.2 lib/
 
       - get change stats relative to the last change on some date::
 
           hg diff --stat --from "date('may 2')"
 
       - diff all newly-added files that contain a keyword::
 
           hg diff "set:added() and grep(GNU)"
 
       - compare a revision and its parents::
 
           hg diff -c 9353                  # compare against first parent
           hg diff --from 9353^ --to 9353   # same using revset syntax
           hg diff --from 9353^2 --to 9353  # compare against the second parent
 
     Returns 0 on success.
     """
 
     cmdutil.check_at_most_one_arg(opts, 'rev', 'change')
     opts = pycompat.byteskwargs(opts)
     revs = opts.get(b'rev')
     change = opts.get(b'change')
     from_rev = opts.get(b'from')
     to_rev = opts.get(b'to')
     stat = opts.get(b'stat')
     reverse = opts.get(b'reverse')
 
     cmdutil.check_incompatible_arguments(opts, b'from', [b'rev', b'change'])
     cmdutil.check_incompatible_arguments(opts, b'to', [b'rev', b'change'])
     if change:
         repo = scmutil.unhidehashlikerevs(repo, [change], b'nowarn')
         ctx2 = logcmdutil.revsingle(repo, change, None)
         ctx1 = logcmdutil.diff_parent(ctx2)
     elif from_rev or to_rev:
         repo = scmutil.unhidehashlikerevs(
             repo, [from_rev] + [to_rev], b'nowarn'
         )
         ctx1 = logcmdutil.revsingle(repo, from_rev, None)
         ctx2 = logcmdutil.revsingle(repo, to_rev, None)
     else:
         repo = scmutil.unhidehashlikerevs(repo, revs, b'nowarn')
         ctx1, ctx2 = logcmdutil.revpair(repo, revs)
 
     if reverse:
         ctxleft = ctx2
         ctxright = ctx1
     else:
         ctxleft = ctx1
         ctxright = ctx2
 
     diffopts = patch.diffallopts(ui, opts)
     m = scmutil.match(ctx2, pats, opts)
     m = repo.narrowmatch(m)
     ui.pager(b'diff')
     logcmdutil.diffordiffstat(
         ui,
         repo,
         diffopts,
         ctxleft,
         ctxright,
         m,
         stat=stat,
         listsubrepos=opts.get(b'subrepos'),
         root=opts.get(b'root'),
     )
 
 
 @command(
     b'export',
     [
         (
             b'B',
             b'bookmark',
             b'',
             _(b'export changes only reachable by given bookmark'),
             _(b'BOOKMARK'),
         ),
         (
             b'o',
             b'output',
             b'',
             _(b'print output to file with formatted name'),
             _(b'FORMAT'),
         ),
         (b'', b'switch-parent', None, _(b'diff against the second parent')),
         (b'r', b'rev', [], _(b'revisions to export'), _(b'REV')),
     ]
     + diffopts
     + formatteropts,
     _(b'[OPTION]... [-o OUTFILESPEC] [-r] [REV]...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
     helpbasic=True,
     intents={INTENT_READONLY},
 )
 def export(ui, repo, *changesets, **opts):
     """dump the header and diffs for one or more changesets
 
     Print the changeset header and diffs for one or more revisions.
     If no revision is given, the parent of the working directory is used.
 
     The information shown in the changeset header is: author, date,
     branch name (if non-default), changeset hash, parent(s) and commit
     comment.
 
     .. note::
 
        :hg:`export` may generate unexpected diff output for merge
        changesets, as it will compare the merge changeset against its
        first parent only.
 
     Output may be to a file, in which case the name of the file is
     given using a template string. See :hg:`help templates`. In addition
     to the common template keywords, the following formatting rules are
     supported:
 
     :``%%``: literal "%" character
     :``%H``: changeset hash (40 hexadecimal digits)
     :``%N``: number of patches being generated
     :``%R``: changeset revision number
     :``%b``: basename of the exporting repository
     :``%h``: short-form changeset hash (12 hexadecimal digits)
     :``%m``: first line of the commit message (only alphanumeric characters)
     :``%n``: zero-padded sequence number, starting at 1
     :``%r``: zero-padded changeset revision number
     :``\\``: literal "\\" character
 
     Without the -a/--text option, export will avoid generating diffs
     of files it detects as binary. With -a, export will generate a
     diff anyway, probably with undesirable results.
 
     With -B/--bookmark changesets reachable by the given bookmark are
     selected.
 
     Use the -g/--git option to generate diffs in the git extended diff
     format. See :hg:`help diffs` for more information.
 
     With the --switch-parent option, the diff will be against the
     second parent. It can be useful to review a merge.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :diff:    String. Diff content.
       :parents: List of strings. Parent nodes of the changeset.
 
       Examples:
 
       - use export and import to transplant a bugfix to the current
         branch::
 
           hg export -r 9353 | hg import -
 
       - export all the changesets between two revisions to a file with
         rename information::
 
           hg export --git -r 123:150 > changes.txt
 
       - split outgoing changes into a series of patches with
         descriptive names::
 
           hg export -r "outgoing()" -o "%n-%m.patch"
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     bookmark = opts.get(b'bookmark')
     changesets += tuple(opts.get(b'rev', []))
 
     cmdutil.check_at_most_one_arg(opts, b'rev', b'bookmark')
 
     if bookmark:
         if bookmark not in repo._bookmarks:
             raise error.InputError(_(b"bookmark '%s' not found") % bookmark)
 
         revs = scmutil.bookmarkrevs(repo, bookmark)
     else:
         if not changesets:
             changesets = [b'.']
 
         repo = scmutil.unhidehashlikerevs(repo, changesets, b'nowarn')
         revs = logcmdutil.revrange(repo, changesets)
 
     if not revs:
         raise error.InputError(_(b"export requires at least one changeset"))
     if len(revs) > 1:
         ui.note(_(b'exporting patches:\n'))
     else:
         ui.note(_(b'exporting patch:\n'))
 
     fntemplate = opts.get(b'output')
     if cmdutil.isstdiofilename(fntemplate):
         fntemplate = b''
 
     if fntemplate:
         fm = formatter.nullformatter(ui, b'export', opts)
     else:
         ui.pager(b'export')
         fm = ui.formatter(b'export', opts)
     with fm:
         cmdutil.export(
             repo,
             revs,
             fm,
             fntemplate=fntemplate,
             switch_parent=opts.get(b'switch_parent'),
             opts=patch.diffallopts(ui, opts),
         )
 
 
 @command(
     b'files',
     [
         (
             b'r',
             b'rev',
             b'',
             _(b'search the repository as it is in REV'),
             _(b'REV'),
         ),
         (
             b'0',
             b'print0',
             None,
             _(b'end filenames with NUL, for use with xargs'),
         ),
     ]
     + walkopts
     + formatteropts
     + subrepoopts,
     _(b'[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     intents={INTENT_READONLY},
 )
 def files(ui, repo, *pats, **opts):
     """list tracked files
 
     Print files under Mercurial control in the working directory or
     specified revision for given files (excluding removed files).
     Files can be specified as filenames or filesets.
 
     If no files are given to match, this command prints the names
     of all files under Mercurial control.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :flags:   String. Character denoting file's symlink and executable bits.
       :path:    String. Repository-absolute path of the file.
       :size:    Integer. Size of the file in bytes.
 
       Examples:
 
       - list all files under the current directory::
 
           hg files .
 
       - shows sizes and flags for current revision::
 
           hg files -vr .
 
       - list all files named README::
 
           hg files -I "**/README"
 
       - list all binary files::
 
           hg files "set:binary()"
 
       - find files containing a regular expression::
 
           hg files "set:grep('bob')"
 
       - search tracked file contents with xargs and grep::
 
           hg files -0 | xargs -0 grep foo
 
     See :hg:`help patterns` and :hg:`help filesets` for more information
     on specifying file patterns.
 
     Returns 0 if a match is found, 1 otherwise.
 
     """
 
     opts = pycompat.byteskwargs(opts)
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
     ctx = logcmdutil.revsingle(repo, rev, None)
 
     end = b'\n'
     if opts.get(b'print0'):
         end = b'\0'
     fmt = b'%s' + end
 
     m = scmutil.match(ctx, pats, opts)
     ui.pager(b'files')
     uipathfn = scmutil.getuipathfn(ctx.repo(), legacyrelativevalue=True)
     with ui.formatter(b'files', opts) as fm:
         return cmdutil.files(
             ui, ctx, m, uipathfn, fm, fmt, opts.get(b'subrepos')
         )
 
 
 @command(
     b'forget',
     [
         (b'i', b'interactive', None, _(b'use interactive mode')),
     ]
     + walkopts
     + dryrunopts,
     _(b'[OPTION]... FILE...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
     inferrepo=True,
 )
 def forget(ui, repo, *pats, **opts):
     """forget the specified files on the next commit
 
     Mark the specified files so they will no longer be tracked
     after the next commit.
 
     This only removes files from the current branch, not from the
     entire project history, and it does not delete them from the
     working directory.
 
     To delete the file from the working directory, see :hg:`remove`.
 
     To undo a forget before the next commit, see :hg:`add`.
 
     .. container:: verbose
 
       Examples:
 
       - forget newly-added binary files::
 
           hg forget "set:added() and binary()"
 
       - forget files that would be excluded by .hgignore::
 
           hg forget "set:hgignore()"
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     if not pats:
         raise error.InputError(_(b'no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     dryrun, interactive = opts.get(b'dry_run'), opts.get(b'interactive')
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     rejected = cmdutil.forget(
         ui,
         repo,
         m,
         prefix=b"",
         uipathfn=uipathfn,
         explicitonly=False,
         dryrun=dryrun,
         interactive=interactive,
     )[0]
     return rejected and 1 or 0
 
 
 @command(
     b'graft',
     [
         (b'r', b'rev', [], _(b'revisions to graft'), _(b'REV')),
         (
             b'',
             b'base',
             b'',
             _(b'base revision when doing the graft merge (ADVANCED)'),
             _(b'REV'),
         ),
         (b'c', b'continue', False, _(b'resume interrupted graft')),
         (b'', b'stop', False, _(b'stop interrupted graft')),
         (b'', b'abort', False, _(b'abort interrupted graft')),
         (b'e', b'edit', False, _(b'invoke editor on commit messages')),
         (b'', b'log', None, _(b'append graft info to log message')),
         (
             b'',
             b'no-commit',
             None,
             _(b"don't commit, just apply the changes in working directory"),
         ),
         (b'f', b'force', False, _(b'force graft')),
         (
             b'D',
             b'currentdate',
             False,
             _(b'record the current date as commit date'),
         ),
         (
             b'U',
             b'currentuser',
             False,
             _(b'record the current user as committer'),
         ),
     ]
     + commitopts2
     + mergetoolopts
     + dryrunopts,
     _(b'[OPTION]... [-r REV]... REV...'),
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
 )
 def graft(ui, repo, *revs, **opts):
     """copy changes from other branches onto the current branch
 
     This command uses Mercurial's merge logic to copy individual
     changes from other branches without merging branches in the
     history graph. This is sometimes known as 'backporting' or
     'cherry-picking'. By default, graft will copy user, date, and
     description from the source changesets.
 
     Changesets that are ancestors of the current revision, that have
     already been grafted, or that are merges will be skipped.
 
     If --log is specified, log messages will have a comment appended
     of the form::
 
       (grafted from CHANGESETHASH)
 
     If --force is specified, revisions will be grafted even if they
     are already ancestors of, or have been grafted to, the destination.
     This is useful when the revisions have since been backed out.
 
     If a graft merge results in conflicts, the graft process is
     interrupted so that the current merge can be manually resolved.
     Once all conflicts are addressed, the graft process can be
     continued with the -c/--continue option.
 
     The -c/--continue option reapplies all the earlier options.
 
     .. container:: verbose
 
       The --base option exposes more of how graft internally uses merge with a
       custom base revision. --base can be used to specify another ancestor than
       the first and only parent.
 
       The command::
 
         hg graft -r 345 --base 234
 
       is thus pretty much the same as::
 
         hg diff --from 234 --to 345 | hg import
 
       but using merge to resolve conflicts and track moved files.
 
       The result of a merge can thus be backported as a single commit by
       specifying one of the merge parents as base, and thus effectively
       grafting the changes from the other side.
 
       It is also possible to collapse multiple changesets and clean up history
       by specifying another ancestor as base, much like rebase --collapse
       --keep.
 
       The commit message can be tweaked after the fact using commit --amend .
 
       For using non-ancestors as the base to backout changes, see the backout
       command and the hidden --parent option.
 
     .. container:: verbose
 
       Examples:
 
       - copy a single change to the stable branch and edit its description::
 
           hg update stable
           hg graft --edit 9393
 
       - graft a range of changesets with one exception, updating dates::
 
           hg graft -D "2085::2093 and not 2091"
 
       - continue a graft after resolving conflicts::
 
           hg graft -c
 
       - show the source of a grafted changeset::
 
           hg log --debug -r .
 
       - show revisions sorted by date::
 
           hg log -r "sort(all(), date)"
 
       - backport the result of a merge as a single commit::
 
           hg graft -r 123 --base 123^
 
       - land a feature branch as one changeset::
 
           hg up -cr default
           hg graft -r featureX --base "ancestor('featureX', 'default')"
 
     See :hg:`help revisions` for more about specifying revisions.
 
     Returns 0 on successful completion, 1 if there are unresolved files.
     """
     with repo.wlock():
         return _dograft(ui, repo, *revs, **opts)
 
 
 def _dograft(ui, repo, *revs, **opts):
     if revs and opts.get('rev'):
         ui.warn(
             _(
                 b'warning: inconsistent use of --rev might give unexpected '
                 b'revision ordering!\n'
             )
         )
 
     revs = list(revs)
     revs.extend(opts.get('rev'))
     # a dict of data to be stored in state file
     statedata = {}
     # list of new nodes created by ongoing graft
     statedata[b'newnodes'] = []
 
     cmdutil.resolve_commit_options(ui, opts)
 
     editor = cmdutil.getcommiteditor(editform=b'graft', **opts)
 
     cmdutil.check_at_most_one_arg(opts, 'abort', 'stop', 'continue')
 
     cont = False
     if opts.get('no_commit'):
         cmdutil.check_incompatible_arguments(
             opts,
             'no_commit',
             ['edit', 'currentuser', 'currentdate', 'log'],
         )
 
     graftstate = statemod.cmdstate(repo, b'graftstate')
 
     if opts.get('stop'):
         cmdutil.check_incompatible_arguments(
             opts,
             'stop',
             [
                 'edit',
                 'log',
                 'user',
                 'date',
                 'currentdate',
                 'currentuser',
                 'rev',
             ],
         )
         return _stopgraft(ui, repo, graftstate)
     elif opts.get('abort'):
         cmdutil.check_incompatible_arguments(
             opts,
             'abort',
             [
                 'edit',
                 'log',
                 'user',
                 'date',
                 'currentdate',
                 'currentuser',
                 'rev',
             ],
         )
         return cmdutil.abortgraft(ui, repo, graftstate)
     elif opts.get('continue'):
         cont = True
         if revs:
             raise error.InputError(_(b"can't specify --continue and revisions"))
         # read in unfinished revisions
         if graftstate.exists():
             statedata = cmdutil.readgraftstate(repo, graftstate)
             if statedata.get(b'date'):
                 opts['date'] = statedata[b'date']
             if statedata.get(b'user'):
                 opts['user'] = statedata[b'user']
             if statedata.get(b'log'):
                 opts['log'] = True
             if statedata.get(b'no_commit'):
                 opts['no_commit'] = statedata.get(b'no_commit')
             if statedata.get(b'base'):
                 opts['base'] = statedata.get(b'base')
             nodes = statedata[b'nodes']
             revs = [repo[node].rev() for node in nodes]
         else:
             cmdutil.wrongtooltocontinue(repo, _(b'graft'))
     else:
         if not revs:
             raise error.InputError(_(b'no revisions specified'))
         cmdutil.checkunfinished(repo)
         cmdutil.bailifchanged(repo)
         revs = logcmdutil.revrange(repo, revs)
 
     skipped = set()
     basectx = None
     if opts.get('base'):
         basectx = logcmdutil.revsingle(repo, opts['base'], None)
     if basectx is None:
         # check for merges
         for rev in repo.revs(b'%ld and merge()', revs):
             ui.warn(_(b'skipping ungraftable merge revision %d\n') % rev)
             skipped.add(rev)
     revs = [r for r in revs if r not in skipped]
     if not revs:
         return -1
     if basectx is not None and len(revs) != 1:
         raise error.InputError(_(b'only one revision allowed with --base '))
 
     # Don't check in the --continue case, in effect retaining --force across
     # --continues. That's because without --force, any revisions we decided to
     # skip would have been filtered out here, so they wouldn't have made their
     # way to the graftstate. With --force, any revisions we would have otherwise
     # skipped would not have been filtered out, and if they hadn't been applied
     # already, they'd have been in the graftstate.
     if not (cont or opts.get('force')) and basectx is None:
         # check for ancestors of dest branch
         ancestors = repo.revs(b'%ld & (::.)', revs)
         for rev in ancestors:
             ui.warn(_(b'skipping ancestor revision %d:%s\n') % (rev, repo[rev]))
 
         revs = [r for r in revs if r not in ancestors]
 
         if not revs:
             return -1
 
         # analyze revs for earlier grafts
         ids = {}
         for ctx in repo.set(b"%ld", revs):
             ids[ctx.hex()] = ctx.rev()
             n = ctx.extra().get(b'source')
             if n:
                 ids[n] = ctx.rev()
 
         # check ancestors for earlier grafts
         ui.debug(b'scanning for duplicate grafts\n')
 
         # The only changesets we can be sure doesn't contain grafts of any
         # revs, are the ones that are common ancestors of *all* revs:
         for rev in repo.revs(b'only(%d,ancestor(%ld))', repo[b'.'].rev(), revs):
             ctx = repo[rev]
             n = ctx.extra().get(b'source')
             if n in ids:
                 try:
                     r = repo[n].rev()
                 except error.RepoLookupError:
                     r = None
                 if r in revs:
                     ui.warn(
                         _(
                             b'skipping revision %d:%s '
                             b'(already grafted to %d:%s)\n'
                         )
                         % (r, repo[r], rev, ctx)
                     )
                     revs.remove(r)
                 elif ids[n] in revs:
                     if r is None:
                         ui.warn(
                             _(
                                 b'skipping already grafted revision %d:%s '
                                 b'(%d:%s also has unknown origin %s)\n'
                             )
                             % (ids[n], repo[ids[n]], rev, ctx, n[:12])
                         )
                     else:
                         ui.warn(
                             _(
                                 b'skipping already grafted revision %d:%s '
                                 b'(%d:%s also has origin %d:%s)\n'
                             )
                             % (ids[n], repo[ids[n]], rev, ctx, r, n[:12])
                         )
                     revs.remove(ids[n])
             elif ctx.hex() in ids:
                 r = ids[ctx.hex()]
                 if r in revs:
                     ui.warn(
                         _(
                             b'skipping already grafted revision %d:%s '
                             b'(was grafted from %d:%s)\n'
                         )
                         % (r, repo[r], rev, ctx)
                     )
                     revs.remove(r)
         if not revs:
             return -1
 
     if opts.get('no_commit'):
         statedata[b'no_commit'] = True
     if opts.get('base'):
         statedata[b'base'] = opts['base']
     for pos, ctx in enumerate(repo.set(b"%ld", revs)):
         desc = b'%d:%s "%s"' % (
             ctx.rev(),
             ctx,
             ctx.description().split(b'\n', 1)[0],
         )
         names = repo.nodetags(ctx.node()) + repo.nodebookmarks(ctx.node())
         if names:
             desc += b' (%s)' % b' '.join(names)
         ui.status(_(b'grafting %s\n') % desc)
         if opts.get('dry_run'):
             continue
 
         source = ctx.extra().get(b'source')
         extra = {}
         if source:
             extra[b'source'] = source
             extra[b'intermediate-source'] = ctx.hex()
         else:
             extra[b'source'] = ctx.hex()
         user = ctx.user()
         if opts.get('user'):
             user = opts['user']
             statedata[b'user'] = user
         date = ctx.date()
         if opts.get('date'):
             date = opts['date']
             statedata[b'date'] = date
         message = ctx.description()
         if opts.get('log'):
             message += b'\n(grafted from %s)' % ctx.hex()
             statedata[b'log'] = True
 
         # we don't merge the first commit when continuing
         if not cont:
             # perform the graft merge with p1(rev) as 'ancestor'
             overrides = {(b'ui', b'forcemerge'): opts.get('tool', b'')}
             base = ctx.p1() if basectx is None else basectx
             with ui.configoverride(overrides, b'graft'):
                 stats = mergemod.graft(repo, ctx, base, [b'local', b'graft'])
             # report any conflicts
             if stats.unresolvedcount > 0:
                 # write out state for --continue
                 nodes = [repo[rev].hex() for rev in revs[pos:]]
                 statedata[b'nodes'] = nodes
                 stateversion = 1
                 graftstate.save(stateversion, statedata)
                 ui.error(_(b"abort: unresolved conflicts, can't continue\n"))
                 ui.error(_(b"(use 'hg resolve' and 'hg graft --continue')\n"))
                 return 1
         else:
             cont = False
 
         # commit if --no-commit is false
         if not opts.get('no_commit'):
             node = repo.commit(
                 text=message, user=user, date=date, extra=extra, editor=editor
             )
             if node is None:
                 ui.warn(
                     _(b'note: graft of %d:%s created no changes to commit\n')
                     % (ctx.rev(), ctx)
                 )
             # checking that newnodes exist because old state files won't have it
             elif statedata.get(b'newnodes') is not None:
                 nn = statedata[b'newnodes']
                 assert isinstance(nn, list)  # list of bytes
                 nn.append(node)
 
     # remove state when we complete successfully
     if not opts.get('dry_run'):
         graftstate.delete()
 
     return 0
 
 
 def _stopgraft(ui, repo, graftstate):
     """stop the interrupted graft"""
     if not graftstate.exists():
         raise error.StateError(_(b"no interrupted graft found"))
     pctx = repo[b'.']
     mergemod.clean_update(pctx)
     graftstate.delete()
     ui.status(_(b"stopped the interrupted graft\n"))
     ui.status(_(b"working directory is now at %s\n") % pctx.hex()[:12])
     return 0
 
 
 statemod.addunfinished(
     b'graft',
     fname=b'graftstate',
     clearable=True,
     stopflag=True,
     continueflag=True,
     abortfunc=cmdutil.hgabortgraft,
     cmdhint=_(b"use 'hg graft --continue' or 'hg graft --stop' to stop"),
 )
 
 
 @command(
     b'grep',
     [
         (b'0', b'print0', None, _(b'end fields with NUL')),
         (b'', b'all', None, _(b'an alias to --diff (DEPRECATED)')),
         (
             b'',
             b'diff',
             None,
             _(
                 b'search revision differences for when the pattern was added '
                 b'or removed'
             ),
         ),
         (b'a', b'text', None, _(b'treat all files as text')),
         (
             b'f',
             b'follow',
             None,
             _(
                 b'follow changeset history,'
                 b' or file history across copies and renames'
             ),
         ),
         (b'i', b'ignore-case', None, _(b'ignore case when matching')),
         (
             b'l',
             b'files-with-matches',
             None,
             _(b'print only filenames and revisions that match'),
         ),
         (b'n', b'line-number', None, _(b'print matching line numbers')),
         (
             b'r',
             b'rev',
             [],
             _(b'search files changed within revision range'),
             _(b'REV'),
         ),
         (
             b'',
             b'all-files',
             None,
             _(
                 b'include all files in the changeset while grepping (DEPRECATED)'
             ),
         ),
         (b'u', b'user', None, _(b'list the author (long with -v)')),
         (b'd', b'date', None, _(b'list the date (short with -q)')),
     ]
     + formatteropts
     + walkopts,
     _(b'[--diff] [OPTION]... PATTERN [FILE]...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     inferrepo=True,
     intents={INTENT_READONLY},
 )
 def grep(ui, repo, pattern, *pats, **opts):
     """search for a pattern in specified files
 
     Search the working directory or revision history for a regular
     expression in the specified files for the entire repository.
 
     By default, grep searches the repository files in the working
     directory and prints the files where it finds a match. To specify
     historical revisions instead of the working directory, use the
     --rev flag.
 
     To search instead historical revision differences that contains a
     change in match status ("-" for a match that becomes a non-match,
     or "+" for a non-match that becomes a match), use the --diff flag.
 
     PATTERN can be any Python (roughly Perl-compatible) regular
     expression.
 
     If no FILEs are specified and the --rev flag isn't supplied, all
     files in the working directory are searched. When using the --rev
     flag and specifying FILEs, use the --follow argument to also
     follow the specified FILEs across renames and copies.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :change:  String. Character denoting insertion ``+`` or removal ``-``.
                 Available if ``--diff`` is specified.
       :lineno:  Integer. Line number of the match.
       :path:    String. Repository-absolute path of the file.
       :texts:   List of text chunks.
 
       And each entry of ``{texts}`` provides the following sub-keywords.
 
       :matched: Boolean. True if the chunk matches the specified pattern.
       :text:    String. Chunk content.
 
       See :hg:`help templates.operators` for the list expansion syntax.
 
     Returns 0 if a match is found, 1 otherwise.
 
     """
     cmdutil.check_incompatible_arguments(opts, 'all_files', ['all', 'diff'])
     opts = pycompat.byteskwargs(opts)
     diff = opts.get(b'all') or opts.get(b'diff')
     follow = opts.get(b'follow')
     if opts.get(b'all_files') is None and not diff:
         opts[b'all_files'] = True
     plaingrep = (
         opts.get(b'all_files')
         and not opts.get(b'rev')
         and not opts.get(b'follow')
     )
     all_files = opts.get(b'all_files')
     if plaingrep:
         opts[b'rev'] = [b'wdir()']
 
     reflags = re.M
     if opts.get(b'ignore_case'):
         reflags |= re.I
     try:
         regexp = util.re.compile(pattern, reflags)
     except re.error as inst:
         ui.warn(
             _(b"grep: invalid match pattern: %s\n")
             % stringutil.forcebytestr(inst)
         )
         return 1
     sep, eol = b':', b'\n'
     if opts.get(b'print0'):
         sep = eol = b'\0'
 
     searcher = grepmod.grepsearcher(
         ui, repo, regexp, all_files=all_files, diff=diff, follow=follow
     )
 
     getfile = searcher._getfile
 
     uipathfn = scmutil.getuipathfn(repo)
 
     def display(fm, fn, ctx, pstates, states):
         rev = scmutil.intrev(ctx)
         if fm.isplain():
             formatuser = ui.shortuser
         else:
             formatuser = pycompat.bytestr
         if ui.quiet:
             datefmt = b'%Y-%m-%d'
         else:
             datefmt = b'%a %b %d %H:%M:%S %Y %1%2'
         found = False
 
         @util.cachefunc
         def binary():
             flog = getfile(fn)
             try:
                 return stringutil.binary(flog.read(ctx.filenode(fn)))
             except error.WdirUnsupported:
                 return ctx[fn].isbinary()
 
         fieldnamemap = {b'linenumber': b'lineno'}
         if diff:
             iter = grepmod.difflinestates(pstates, states)
         else:
             iter = [(b'', l) for l in states]
         for change, l in iter:
             fm.startitem()
             fm.context(ctx=ctx)
             fm.data(node=fm.hexfunc(scmutil.binnode(ctx)), path=fn)
             fm.plain(uipathfn(fn), label=b'grep.filename')
 
             cols = [
                 (b'rev', b'%d', rev, not plaingrep, b''),
                 (
                     b'linenumber',
                     b'%d',
                     l.linenum,
                     opts.get(b'line_number'),
                     b'',
                 ),
             ]
             if diff:
                 cols.append(
                     (
                         b'change',
                         b'%s',
                         change,
                         True,
                         b'grep.inserted '
                         if change == b'+'
                         else b'grep.deleted ',
                     )
                 )
             cols.extend(
                 [
                     (
                         b'user',
                         b'%s',
                         formatuser(ctx.user()),
                         opts.get(b'user'),
                         b'',
                     ),
                     (
                         b'date',
                         b'%s',
                         fm.formatdate(ctx.date(), datefmt),
                         opts.get(b'date'),
                         b'',
                     ),
                 ]
             )
             for name, fmt, data, cond, extra_label in cols:
                 if cond:
                     fm.plain(sep, label=b'grep.sep')
                 field = fieldnamemap.get(name, name)
                 label = extra_label + (b'grep.%s' % name)
                 fm.condwrite(cond, field, fmt, data, label=label)
             if not opts.get(b'files_with_matches'):
                 fm.plain(sep, label=b'grep.sep')
                 if not opts.get(b'text') and binary():
                     fm.plain(_(b" Binary file matches"))
                 else:
                     displaymatches(fm.nested(b'texts', tmpl=b'{text}'), l)
             fm.plain(eol)
             found = True
             if opts.get(b'files_with_matches'):
                 break
         return found
 
     def displaymatches(fm, l):
         p = 0
         for s, e in l.findpos(regexp):
             if p < s:
                 fm.startitem()
                 fm.write(b'text', b'%s', l.line[p:s])
                 fm.data(matched=False)
             fm.startitem()
             fm.write(b'text', b'%s', l.line[s:e], label=b'grep.match')
             fm.data(matched=True)
             p = e
         if p < len(l.line):
             fm.startitem()
             fm.write(b'text', b'%s', l.line[p:])
             fm.data(matched=False)
         fm.end()
 
     found = False
 
     wopts = logcmdutil.walkopts(
         pats=pats,
         opts=opts,
         revspec=opts[b'rev'],
         include_pats=opts[b'include'],
         exclude_pats=opts[b'exclude'],
         follow=follow,
         force_changelog_traversal=all_files,
         filter_revisions_by_pats=not all_files,
     )
     revs, makefilematcher = logcmdutil.makewalker(repo, wopts)
 
     ui.pager(b'grep')
     fm = ui.formatter(b'grep', opts)
     for fn, ctx, pstates, states in searcher.searchfiles(revs, makefilematcher):
         r = display(fm, fn, ctx, pstates, states)
         found = found or r
         if r and not diff and not all_files:
             searcher.skipfile(fn, ctx.rev())
     fm.end()
 
     return not found
 
 
 @command(
     b'heads',
     [
         (
             b'r',
             b'rev',
             b'',
             _(b'show only heads which are descendants of STARTREV'),
             _(b'STARTREV'),
         ),
         (b't', b'topo', False, _(b'show topological heads only')),
         (
             b'a',
             b'active',
             False,
             _(b'show active branchheads only (DEPRECATED)'),
         ),
         (b'c', b'closed', False, _(b'show normal and closed branch heads')),
     ]
     + templateopts,
     _(b'[-ct] [-r STARTREV] [REV]...'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     intents={INTENT_READONLY},
 )
 def heads(ui, repo, *branchrevs, **opts):
     """show branch heads
 
     With no arguments, show all open branch heads in the repository.
     Branch heads are changesets that have no descendants on the
     same branch. They are where development generally takes place and
     are the usual targets for update and merge operations.
 
     If one or more REVs are given, only open branch heads on the
     branches associated with the specified changesets are shown. This
     means that you can use :hg:`heads .` to see the heads on the
     currently checked-out branch.
 
     If -c/--closed is specified, also show branch heads marked closed
     (see :hg:`commit --close-branch`).
 
     If STARTREV is specified, only those heads that are descendants of
     STARTREV will be displayed.
 
     If -t/--topo is specified, named branch mechanics will be ignored and only
     topological heads (changesets with no children) will be shown.
 
     Returns 0 if matching heads are found, 1 if not.
     """
 
     opts = pycompat.byteskwargs(opts)
     start = None
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
         start = logcmdutil.revsingle(repo, rev, None).node()
 
     if opts.get(b'topo'):
         heads = [repo[h] for h in repo.heads(start)]
     else:
         heads = []
         for branch in repo.branchmap():
             heads += repo.branchheads(branch, start, opts.get(b'closed'))
         heads = [repo[h] for h in heads]
 
     if branchrevs:
         branches = {
             repo[r].branch() for r in logcmdutil.revrange(repo, branchrevs)
         }
         heads = [h for h in heads if h.branch() in branches]
 
     if opts.get(b'active') and branchrevs:
         dagheads = repo.heads(start)
         heads = [h for h in heads if h.node() in dagheads]
 
     if branchrevs:
         haveheads = {h.branch() for h in heads}
         if branches - haveheads:
             headless = b', '.join(b for b in branches - haveheads)
             msg = _(b'no open branch heads found on branches %s')
             if opts.get(b'rev'):
                 msg += _(b' (started at %s)') % opts[b'rev']
             ui.warn((msg + b'\n') % headless)
 
     if not heads:
         return 1
 
     ui.pager(b'heads')
     heads = sorted(heads, key=lambda x: -(x.rev()))
     displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
     for ctx in heads:
         displayer.show(ctx)
     displayer.close()
 
 
 @command(
     b'help',
     [
         (b'e', b'extension', None, _(b'show only help for extensions')),
         (b'c', b'command', None, _(b'show only help for commands')),
         (b'k', b'keyword', None, _(b'show topics matching keyword')),
         (
             b's',
             b'system',
             [],
             _(b'show help for specific platform(s)'),
             _(b'PLATFORM'),
         ),
     ],
     _(b'[-eck] [-s PLATFORM] [TOPIC]'),
     helpcategory=command.CATEGORY_HELP,
     norepo=True,
     intents={INTENT_READONLY},
 )
 def help_(ui, name=None, **opts):
     """show help for a given topic or a help overview
 
     With no arguments, print a list of commands with short help messages.
 
     Given a topic, extension, or command name, print help for that
     topic.
 
     Returns 0 if successful.
     """
 
     keep = opts.get('system') or []
     if len(keep) == 0:
         if pycompat.sysplatform.startswith(b'win'):
             keep.append(b'windows')
         elif pycompat.sysplatform == b'OpenVMS':
             keep.append(b'vms')
         elif pycompat.sysplatform == b'plan9':
             keep.append(b'plan9')
         else:
             keep.append(b'unix')
             keep.append(pycompat.sysplatform.lower())
     if ui.verbose:
         keep.append(b'verbose')
 
     commands = sys.modules[__name__]
     formatted = help.formattedhelp(ui, commands, name, keep=keep, **opts)
     ui.pager(b'help')
     ui.write(formatted)
 
 
 @command(
     b'identify|id',
     [
         (b'r', b'rev', b'', _(b'identify the specified revision'), _(b'REV')),
         (b'n', b'num', None, _(b'show local revision number')),
         (b'i', b'id', None, _(b'show global revision id')),
         (b'b', b'branch', None, _(b'show branch')),
         (b't', b'tags', None, _(b'show tags')),
         (b'B', b'bookmarks', None, _(b'show bookmarks')),
     ]
     + remoteopts
     + formatteropts,
     _(b'[-nibtB] [-r REV] [SOURCE]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     optionalrepo=True,
     intents={INTENT_READONLY},
 )
 def identify(
     ui,
     repo,
     source=None,
     rev=None,
     num=None,
     id=None,
     branch=None,
     tags=None,
     bookmarks=None,
     **opts
 ):
     """identify the working directory or specified revision
 
     Print a summary identifying the repository state at REV using one or
     two parent hash identifiers, followed by a "+" if the working
     directory has uncommitted changes, the branch name (if not default),
     a list of tags, and a list of bookmarks.
 
     When REV is not given, print a summary of the current state of the
     repository including the working directory. Specify -r. to get information
     of the working directory parent without scanning uncommitted changes.
 
     Specifying a path to a repository root or Mercurial bundle will
     cause lookup to operate on that repository/bundle.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :dirty:   String. Character ``+`` denoting if the working directory has
                 uncommitted changes.
       :id:      String. One or two nodes, optionally followed by ``+``.
       :parents: List of strings. Parent nodes of the changeset.
 
       Examples:
 
       - generate a build identifier for the working directory::
 
           hg id --id > build-id.dat
 
       - find the revision corresponding to a tag::
 
           hg id -n -r 1.3
 
       - check the most recent revision of a remote repository::
 
           hg id -r tip https://www.mercurial-scm.org/repo/hg/
 
     See :hg:`log` for generating more information about specific revisions,
     including full hash identifiers.
 
     Returns 0 if successful.
     """
 
     opts = pycompat.byteskwargs(opts)
     if not repo and not source:
         raise error.InputError(
             _(b"there is no Mercurial repository here (.hg not found)")
         )
 
     default = not (num or id or branch or tags or bookmarks)
     output = []
     revs = []
 
     peer = None
     try:
         if source:
             source, branches = urlutil.get_unique_pull_path(
                 b'identify', repo, ui, source
             )
             # only pass ui when no repo
             peer = hg.peer(repo or ui, opts, source)
             repo = peer.local()
             revs, checkout = hg.addbranchrevs(repo, peer, branches, None)
 
         fm = ui.formatter(b'identify', opts)
         fm.startitem()
 
         if not repo:
             if num or branch or tags:
                 raise error.InputError(
                     _(b"can't query remote revision number, branch, or tags")
                 )
             if not rev and revs:
                 rev = revs[0]
             if not rev:
                 rev = b"tip"
 
             remoterev = peer.lookup(rev)
             hexrev = fm.hexfunc(remoterev)
             if default or id:
                 output = [hexrev]
             fm.data(id=hexrev)
 
             @util.cachefunc
             def getbms():
                 bms = []
 
                 if b'bookmarks' in peer.listkeys(b'namespaces'):
                     hexremoterev = hex(remoterev)
                     bms = [
                         bm
                         for bm, bmr in pycompat.iteritems(
                             peer.listkeys(b'bookmarks')
                         )
                         if bmr == hexremoterev
                     ]
 
                 return sorted(bms)
 
             if fm.isplain():
                 if bookmarks:
                     output.extend(getbms())
                 elif default and not ui.quiet:
                     # multiple bookmarks for a single parent separated by '/'
                     bm = b'/'.join(getbms())
                     if bm:
                         output.append(bm)
             else:
                 fm.data(node=hex(remoterev))
                 if bookmarks or b'bookmarks' in fm.datahint():
                     fm.data(bookmarks=fm.formatlist(getbms(), name=b'bookmark'))
         else:
             if rev:
                 repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
             ctx = logcmdutil.revsingle(repo, rev, None)
 
             if ctx.rev() is None:
                 ctx = repo[None]
                 parents = ctx.parents()
                 taglist = []
                 for p in parents:
                     taglist.extend(p.tags())
 
                 dirty = b""
                 if ctx.dirty(missing=True, merge=False, branch=False):
                     dirty = b'+'
                 fm.data(dirty=dirty)
 
                 hexoutput = [fm.hexfunc(p.node()) for p in parents]
                 if default or id:
                     output = [b"%s%s" % (b'+'.join(hexoutput), dirty)]
                 fm.data(id=b"%s%s" % (b'+'.join(hexoutput), dirty))
 
                 if num:
                     numoutput = [b"%d" % p.rev() for p in parents]
                     output.append(b"%s%s" % (b'+'.join(numoutput), dirty))
 
                 fm.data(
                     parents=fm.formatlist(
                         [fm.hexfunc(p.node()) for p in parents], name=b'node'
                     )
                 )
             else:
                 hexoutput = fm.hexfunc(ctx.node())
                 if default or id:
                     output = [hexoutput]
                 fm.data(id=hexoutput)
 
                 if num:
                     output.append(pycompat.bytestr(ctx.rev()))
                 taglist = ctx.tags()
 
             if default and not ui.quiet:
                 b = ctx.branch()
                 if b != b'default':
                     output.append(b"(%s)" % b)
 
                 # multiple tags for a single parent separated by '/'
                 t = b'/'.join(taglist)
                 if t:
                     output.append(t)
 
                 # multiple bookmarks for a single parent separated by '/'
                 bm = b'/'.join(ctx.bookmarks())
                 if bm:
                     output.append(bm)
             else:
                 if branch:
                     output.append(ctx.branch())
 
                 if tags:
                     output.extend(taglist)
 
                 if bookmarks:
                     output.extend(ctx.bookmarks())
 
             fm.data(node=ctx.hex())
             fm.data(branch=ctx.branch())
             fm.data(tags=fm.formatlist(taglist, name=b'tag', sep=b':'))
             fm.data(bookmarks=fm.formatlist(ctx.bookmarks(), name=b'bookmark'))
             fm.context(ctx=ctx)
 
         fm.plain(b"%s\n" % b' '.join(output))
         fm.end()
     finally:
         if peer:
             peer.close()
 
 
 @command(
     b'import|patch',
     [
         (
             b'p',
             b'strip',
             1,
             _(
                 b'directory strip option for patch. This has the same '
                 b'meaning as the corresponding patch option'
             ),
             _(b'NUM'),
         ),
         (b'b', b'base', b'', _(b'base path (DEPRECATED)'), _(b'PATH')),
         (b'', b'secret', None, _(b'use the secret phase for committing')),
         (b'e', b'edit', False, _(b'invoke editor on commit messages')),
         (
             b'f',
             b'force',
             None,
             _(b'skip check for outstanding uncommitted changes (DEPRECATED)'),
         ),
         (
             b'',
             b'no-commit',
             None,
             _(b"don't commit, just update the working directory"),
         ),
         (
             b'',
             b'bypass',
             None,
             _(b"apply patch without touching the working directory"),
         ),
         (b'', b'partial', None, _(b'commit even if some hunks fail')),
         (b'', b'exact', None, _(b'abort if patch would apply lossily')),
         (b'', b'prefix', b'', _(b'apply patch to subdirectory'), _(b'DIR')),
         (
             b'',
             b'import-branch',
             None,
             _(b'use any branch information in patch (implied by --exact)'),
         ),
     ]
     + commitopts
     + commitopts2
     + similarityopts,
     _(b'[OPTION]... PATCH...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def import_(ui, repo, patch1=None, *patches, **opts):
     """import an ordered set of patches
 
     Import a list of patches and commit them individually (unless
     --no-commit is specified).
 
     To read a patch from standard input (stdin), use "-" as the patch
     name. If a URL is specified, the patch will be downloaded from
     there.
 
     Import first applies changes to the working directory (unless
     --bypass is specified), import will abort if there are outstanding
     changes.
 
     Use --bypass to apply and commit patches directly to the
     repository, without affecting the working directory. Without
     --exact, patches will be applied on top of the working directory
     parent revision.
 
     You can import a patch straight from a mail message. Even patches
     as attachments work (to use the body part, it must have type
     text/plain or text/x-patch). From and Subject headers of email
     message are used as default committer and commit message. All
     text/plain body parts before first diff are added to the commit
     message.
 
     If the imported patch was generated by :hg:`export`, user and
     description from patch override values from message headers and
     body. Values given on command line with -m/--message and -u/--user
     override these.
 
     If --exact is specified, import will set the working directory to
     the parent of each patch before applying it, and will abort if the
     resulting changeset has a different ID than the one recorded in
     the patch. This will guard against various ways that portable
     patch formats and mail systems might fail to transfer Mercurial
     data or metadata. See :hg:`bundle` for lossless transmission.
 
     Use --partial to ensure a changeset will be created from the patch
     even if some hunks fail to apply. Hunks that fail to apply will be
     written to a <target-file>.rej file. Conflicts can then be resolved
     by hand before :hg:`commit --amend` is run to update the created
     changeset. This flag exists to let people import patches that
     partially apply without losing the associated metadata (author,
     date, description, ...).
 
     .. note::
 
        When no hunks apply cleanly, :hg:`import --partial` will create
        an empty changeset, importing only the patch metadata.
 
     With -s/--similarity, hg will attempt to discover renames and
     copies in the patch in the same way as :hg:`addremove`.
 
     It is possible to use external patch programs to perform the patch
     by setting the ``ui.patch`` configuration option. For the default
     internal tool, the fuzz can also be configured via ``patch.fuzz``.
     See :hg:`help config` for more information about configuration
     files and how to use these options.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     .. container:: verbose
 
       Examples:
 
       - import a traditional patch from a website and detect renames::
 
           hg import -s 80 http://example.com/bugfix.patch
 
       - import a changeset from an hgweb server::
 
           hg import https://www.mercurial-scm.org/repo/hg/rev/5ca8c111e9aa
 
       - import all the patches in an Unix-style mbox::
 
           hg import incoming-patches.mbox
 
       - import patches from stdin::
 
           hg import -
 
       - attempt to exactly restore an exported changeset (not always
         possible)::
 
           hg import --exact proposed-fix.patch
 
       - use an external tool to apply a patch which is too fuzzy for
         the default internal tool.
 
           hg import --config ui.patch="patch --merge" fuzzy.patch
 
       - change the default fuzzing from 2 to a less strict 7
 
           hg import --config ui.fuzz=7 fuzz.patch
 
     Returns 0 on success, 1 on partial success (see --partial).
     """
 
     cmdutil.check_incompatible_arguments(
         opts, 'no_commit', ['bypass', 'secret']
     )
     cmdutil.check_incompatible_arguments(opts, 'exact', ['edit', 'prefix'])
     opts = pycompat.byteskwargs(opts)
     if not patch1:
         raise error.InputError(_(b'need at least one patch to import'))
 
     patches = (patch1,) + patches
 
     date = opts.get(b'date')
     if date:
         opts[b'date'] = dateutil.parsedate(date)
 
     exact = opts.get(b'exact')
     update = not opts.get(b'bypass')
     try:
         sim = float(opts.get(b'similarity') or 0)
     except ValueError:
         raise error.InputError(_(b'similarity must be a number'))
     if sim < 0 or sim > 100:
         raise error.InputError(_(b'similarity must be between 0 and 100'))
     if sim and not update:
         raise error.InputError(_(b'cannot use --similarity with --bypass'))
 
     base = opts[b"base"]
     msgs = []
     ret = 0
 
     with repo.wlock():
         if update:
             cmdutil.checkunfinished(repo)
             if exact or not opts.get(b'force'):
                 cmdutil.bailifchanged(repo)
 
         if not opts.get(b'no_commit'):
             lock = repo.lock
             tr = lambda: repo.transaction(b'import')
             dsguard = util.nullcontextmanager
         else:
             lock = util.nullcontextmanager
             tr = util.nullcontextmanager
             dsguard = lambda: dirstateguard.dirstateguard(repo, b'import')
         with lock(), tr(), dsguard():
             parents = repo[None].parents()
             for patchurl in patches:
                 if patchurl == b'-':
                     ui.status(_(b'applying patch from stdin\n'))
                     patchfile = ui.fin
                     patchurl = b'stdin'  # for error message
                 else:
                     patchurl = os.path.join(base, patchurl)
                     ui.status(_(b'applying %s\n') % patchurl)
                     patchfile = hg.openpath(ui, patchurl, sendaccept=False)
 
                 haspatch = False
                 for hunk in patch.split(patchfile):
                     with patch.extract(ui, hunk) as patchdata:
                         msg, node, rej = cmdutil.tryimportone(
                             ui, repo, patchdata, parents, opts, msgs, hg.clean
                         )
                     if msg:
                         haspatch = True
                         ui.note(msg + b'\n')
                     if update or exact:
                         parents = repo[None].parents()
                     else:
                         parents = [repo[node]]
                     if rej:
                         ui.write_err(_(b"patch applied partially\n"))
                         ui.write_err(
                             _(
                                 b"(fix the .rej files and run "
                                 b"`hg commit --amend`)\n"
                             )
                         )
                         ret = 1
                         break
 
                 if not haspatch:
                     raise error.InputError(_(b'%s: no diffs found') % patchurl)
 
             if msgs:
                 repo.savecommitmessage(b'\n* * *\n'.join(msgs))
         return ret
 
 
 @command(
     b'incoming|in',
     [
         (
             b'f',
             b'force',
             None,
             _(b'run even if remote repository is unrelated'),
         ),
         (b'n', b'newest-first', None, _(b'show newest record first')),
         (b'', b'bundle', b'', _(b'file to store the bundles into'), _(b'FILE')),
         (
             b'r',
             b'rev',
             [],
             _(b'a remote changeset intended to be added'),
             _(b'REV'),
         ),
         (b'B', b'bookmarks', False, _(b"compare bookmarks")),
         (
             b'b',
             b'branch',
             [],
             _(b'a specific branch you would like to pull'),
             _(b'BRANCH'),
         ),
     ]
     + logopts
     + remoteopts
     + subrepoopts,
     _(b'[-p] [-n] [-M] [-f] [-r REV]... [--bundle FILENAME] [SOURCE]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
 )
 def incoming(ui, repo, source=b"default", **opts):
     """show new changesets found in source
 
     Show new changesets found in the specified path/URL or the default
     pull location. These are the changesets that would have been pulled
     by :hg:`pull` at the time you issued this command.
 
     See pull for valid source format details.
 
     .. container:: verbose
 
       With -B/--bookmarks, the result of bookmark comparison between
       local and remote repositories is displayed. With -v/--verbose,
       status is also displayed for each bookmark like below::
 
         BM1               01234567890a added
         BM2               1234567890ab advanced
         BM3               234567890abc diverged
         BM4               34567890abcd changed
 
       The action taken locally when pulling depends on the
       status of each bookmark:
 
       :``added``: pull will create it
       :``advanced``: pull will update it
       :``diverged``: pull will create a divergent bookmark
       :``changed``: result depends on remote changesets
 
       From the point of view of pulling behavior, bookmark
       existing only in the remote repository are treated as ``added``,
       even if it is in fact locally deleted.
 
     .. container:: verbose
 
       For remote repository, using --bundle avoids downloading the
       changesets twice if the incoming is followed by a pull.
 
       Examples:
 
       - show incoming changes with patches and full description::
 
           hg incoming -vp
 
       - show incoming changes excluding merges, store a bundle::
 
           hg in -vpM --bundle incoming.hg
           hg pull incoming.hg
 
       - briefly list changes inside a bundle::
 
           hg in changes.hg -T "{desc|firstline}\\n"
 
     Returns 0 if there are incoming changes, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get(b'graph'):
         logcmdutil.checkunsupportedgraphflags([], opts)
 
         def display(other, chlist, displayer):
             revdag = logcmdutil.graphrevs(other, chlist, opts)
             logcmdutil.displaygraph(
                 ui, repo, revdag, displayer, graphmod.asciiedges
             )
 
         hg._incoming(display, lambda: 1, ui, repo, source, opts, buffered=True)
         return 0
 
     cmdutil.check_incompatible_arguments(opts, b'subrepos', [b'bundle'])
 
     if opts.get(b'bookmarks'):
         srcs = urlutil.get_pull_paths(repo, ui, [source])
         for path in srcs:
             source, branches = urlutil.parseurl(
                 path.rawloc, opts.get(b'branch')
             )
             other = hg.peer(repo, opts, source)
             try:
                 if b'bookmarks' not in other.listkeys(b'namespaces'):
                     ui.warn(_(b"remote doesn't support bookmarks\n"))
                     return 0
                 ui.pager(b'incoming')
                 ui.status(
                     _(b'comparing with %s\n') % urlutil.hidepassword(source)
                 )
                 return bookmarks.incoming(
                     ui, repo, other, mode=path.bookmarks_mode
                 )
             finally:
                 other.close()
 
     return hg.incoming(ui, repo, source, opts)
 
 
 @command(
     b'init',
     remoteopts,
     _(b'[-e CMD] [--remotecmd CMD] [DEST]'),
     helpcategory=command.CATEGORY_REPO_CREATION,
     helpbasic=True,
     norepo=True,
 )
 def init(ui, dest=b".", **opts):
     """create a new repository in the given directory
 
     Initialize a new repository in the given directory. If the given
     directory does not exist, it will be created.
 
     If no directory is given, the current directory is used.
 
     It is possible to specify an ``ssh://`` URL as the destination.
     See :hg:`help urls` for more information.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     path = urlutil.get_clone_path(ui, dest)[1]
     peer = hg.peer(ui, opts, path, create=True)
     peer.close()
 
 
 @command(
     b'locate',
     [
         (
             b'r',
             b'rev',
             b'',
             _(b'search the repository as it is in REV'),
             _(b'REV'),
         ),
         (
             b'0',
             b'print0',
             None,
             _(b'end filenames with NUL, for use with xargs'),
         ),
         (
             b'f',
             b'fullpath',
             None,
             _(b'print complete paths from the filesystem root'),
         ),
     ]
     + walkopts,
     _(b'[OPTION]... [PATTERN]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def locate(ui, repo, *pats, **opts):
     """locate files matching specific patterns (DEPRECATED)
 
     Print files under Mercurial control in the working directory whose
     names match the given patterns.
 
     By default, this command searches all directories in the working
     directory. To search just the current directory and its
     subdirectories, use "--include .".
 
     If no patterns are given to match, this command prints the names
     of all files under Mercurial control in the working directory.
 
     If you want to feed the output of this command into the "xargs"
     command, use the -0 option to both this command and "xargs". This
     will avoid the problem of "xargs" treating single filenames that
     contain whitespace as multiple filenames.
 
     See :hg:`help files` for a more versatile command.
 
     Returns 0 if a match is found, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get(b'print0'):
         end = b'\0'
     else:
         end = b'\n'
     ctx = logcmdutil.revsingle(repo, opts.get(b'rev'), None)
 
     ret = 1
     m = scmutil.match(
         ctx, pats, opts, default=b'relglob', badfn=lambda x, y: False
     )
 
     ui.pager(b'locate')
     if ctx.rev() is None:
         # When run on the working copy, "locate" includes removed files, so
         # we get the list of files from the dirstate.
         filesgen = sorted(repo.dirstate.matches(m))
     else:
         filesgen = ctx.matches(m)
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=bool(pats))
     for abs in filesgen:
         if opts.get(b'fullpath'):
             ui.write(repo.wjoin(abs), end)
         else:
             ui.write(uipathfn(abs), end)
         ret = 0
 
     return ret
 
 
 @command(
     b'log|history',
     [
         (
             b'f',
             b'follow',
             None,
             _(
                 b'follow changeset history, or file history across copies and renames'
             ),
         ),
         (
             b'',
             b'follow-first',
             None,
             _(b'only follow the first parent of merge changesets (DEPRECATED)'),
         ),
         (
             b'd',
             b'date',
             b'',
             _(b'show revisions matching date spec'),
             _(b'DATE'),
         ),
         (b'C', b'copies', None, _(b'show copied files')),
         (
             b'k',
             b'keyword',
             [],
             _(b'do case-insensitive search for a given text'),
             _(b'TEXT'),
         ),
         (
             b'r',
             b'rev',
             [],
             _(b'revisions to select or follow from'),
             _(b'REV'),
         ),
         (
             b'L',
             b'line-range',
             [],
             _(b'follow line range of specified file (EXPERIMENTAL)'),
             _(b'FILE,RANGE'),
         ),
         (
             b'',
             b'removed',
             None,
             _(b'include revisions where files were removed'),
         ),
         (
             b'm',
             b'only-merges',
             None,
             _(b'show only merges (DEPRECATED) (use -r "merge()" instead)'),
         ),
         (b'u', b'user', [], _(b'revisions committed by user'), _(b'USER')),
         (
             b'',
             b'only-branch',
             [],
             _(
                 b'show only changesets within the given named branch (DEPRECATED)'
             ),
             _(b'BRANCH'),
         ),
         (
             b'b',
             b'branch',
             [],
             _(b'show changesets within the given named branch'),
             _(b'BRANCH'),
         ),
         (
             b'B',
             b'bookmark',
             [],
             _(b"show changesets within the given bookmark"),
             _(b'BOOKMARK'),
         ),
         (
             b'P',
             b'prune',
             [],
             _(b'do not display revision or any of its ancestors'),
             _(b'REV'),
         ),
     ]
     + logopts
     + walkopts,
     _(b'[OPTION]... [FILE]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     helpbasic=True,
     inferrepo=True,
     intents={INTENT_READONLY},
 )
 def log(ui, repo, *pats, **opts):
     """show revision history of entire repository or files
 
     Print the revision history of the specified files or the entire
     project.
 
     If no revision range is specified, the default is ``tip:0`` unless
     --follow is set.
 
     File history is shown without following rename or copy history of
     files. Use -f/--follow with a filename to follow history across
     renames and copies. --follow without a filename will only show
     ancestors of the starting revisions. The starting revisions can be
     specified by -r/--rev, which default to the working directory parent.
 
     By default this command prints revision number and changeset id,
     tags, non-trivial parents, user, date and time, and a summary for
     each commit. When the -v/--verbose switch is used, the list of
     changed files and full commit message are shown.
 
     With --graph the revisions are shown as an ASCII art DAG with the most
     recent changeset at the top.
     'o' is a changeset, '@' is a working directory parent, '%' is a changeset
     involved in an unresolved merge conflict, '_' closes a branch,
     'x' is obsolete, '*' is unstable, and '+' represents a fork where the
     changeset from the lines below is a parent of the 'o' merge on the same
     line.
     Paths in the DAG are represented with '|', '/' and so forth. ':' in place
     of a '|' indicates one or more revisions in a path are omitted.
 
     .. container:: verbose
 
        Use -L/--line-range FILE,M:N options to follow the history of lines
        from M to N in FILE. With -p/--patch only diff hunks affecting
        specified line range will be shown. This option requires --follow;
        it can be specified multiple times. Currently, this option is not
        compatible with --graph. This option is experimental.
 
     .. note::
 
        :hg:`log --patch` may generate unexpected diff output for merge
        changesets, as it will only compare the merge changeset against
        its first parent. Also, only files different from BOTH parents
        will appear in files:.
 
     .. note::
 
        For performance reasons, :hg:`log FILE` may omit duplicate changes
        made on branches and will not show removals or mode changes. To
        see all such changes, use the --removed switch.
 
     .. container:: verbose
 
        .. note::
 
           The history resulting from -L/--line-range options depends on diff
           options; for instance if white-spaces are ignored, respective changes
           with only white-spaces in specified line range will not be listed.
 
     .. container:: verbose
 
       Some examples:
 
       - changesets with full descriptions and file lists::
 
           hg log -v
 
       - changesets ancestral to the working directory::
 
           hg log -f
 
       - last 10 commits on the current branch::
 
           hg log -l 10 -b .
 
       - changesets showing all modifications of a file, including removals::
 
           hg log --removed file.c
 
       - all changesets that touch a directory, with diffs, excluding merges::
 
           hg log -Mp lib/
 
       - all revision numbers that match a keyword::
 
           hg log -k bug --template "{rev}\\n"
 
       - the full hash identifier of the working directory parent::
 
           hg log -r . --template "{node}\\n"
 
       - list available log templates::
 
           hg log -T list
 
       - check if a given changeset is included in a tagged release::
 
           hg log -r "a21ccf and ancestor(1.9)"
 
       - find all changesets by some user in a date range::
 
           hg log -k alice -d "may 2008 to jul 2008"
 
       - summary of all changesets after the last tag::
 
           hg log -r "last(tagged())::" --template "{desc|firstline}\\n"
 
       - changesets touching lines 13 to 23 for file.c::
 
           hg log -L file.c,13:23
 
       - changesets touching lines 13 to 23 for file.c and lines 2 to 6 of
         main.c with patch::
 
           hg log -L file.c,13:23 -L main.c,2:6 -p
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help revisions` for more about specifying and ordering
     revisions.
 
     See :hg:`help templates` for more about pre-packaged styles and
     specifying custom templates. The default template used by the log
     command can be customized via the ``command-templates.log`` configuration
     setting.
 
     Returns 0 on success.
 
     """
     opts = pycompat.byteskwargs(opts)
     linerange = opts.get(b'line_range')
 
     if linerange and not opts.get(b'follow'):
         raise error.InputError(_(b'--line-range requires --follow'))
 
     if linerange and pats:
         # TODO: take pats as patterns with no line-range filter
         raise error.InputError(
             _(b'FILE arguments are not compatible with --line-range option')
         )
 
     repo = scmutil.unhidehashlikerevs(repo, opts.get(b'rev'), b'nowarn')
     walk_opts = logcmdutil.parseopts(ui, pats, opts)
     revs, differ = logcmdutil.getrevs(repo, walk_opts)
     if linerange:
         # TODO: should follow file history from logcmdutil._initialrevs(),
         # then filter the result by logcmdutil._makerevset() and --limit
         revs, differ = logcmdutil.getlinerangerevs(repo, revs, opts)
 
     getcopies = None
     if opts.get(b'copies'):
         endrev = None
         if revs:
             endrev = revs.max() + 1
         getcopies = scmutil.getcopiesfn(repo, endrev=endrev)
 
     ui.pager(b'log')
     displayer = logcmdutil.changesetdisplayer(
         ui, repo, opts, differ, buffered=True
     )
     if opts.get(b'graph'):
         displayfn = logcmdutil.displaygraphrevs
     else:
         displayfn = logcmdutil.displayrevs
     displayfn(ui, repo, revs, displayer, getcopies)
 
 
 @command(
     b'manifest',
     [
         (b'r', b'rev', b'', _(b'revision to display'), _(b'REV')),
         (b'', b'all', False, _(b"list files from all revisions")),
     ]
     + formatteropts,
     _(b'[-r REV]'),
     helpcategory=command.CATEGORY_MAINTENANCE,
     intents={INTENT_READONLY},
 )
 def manifest(ui, repo, node=None, rev=None, **opts):
     """output the current or given revision of the project manifest
 
     Print a list of version controlled files for the given revision.
     If no revision is given, the first parent of the working directory
     is used, or the null revision if no revision is checked out.
 
     With -v, print file permissions, symlink and executable bits.
     With --debug, print file revision hashes.
 
     If option --all is specified, the list of all files from all revisions
     is printed. This includes deleted and renamed files.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     fm = ui.formatter(b'manifest', opts)
 
     if opts.get(b'all'):
         if rev or node:
             raise error.InputError(_(b"can't specify a revision with --all"))
 
         res = set()
         for rev in repo:
             ctx = repo[rev]
             res |= set(ctx.files())
 
         ui.pager(b'manifest')
         for f in sorted(res):
             fm.startitem()
             fm.write(b"path", b'%s\n', f)
         fm.end()
         return
 
     if rev and node:
         raise error.InputError(_(b"please specify just one revision"))
 
     if not node:
         node = rev
 
     char = {b'l': b'@', b'x': b'*', b'': b'', b't': b'd'}
     mode = {b'l': b'644', b'x': b'755', b'': b'644', b't': b'755'}
     if node:
         repo = scmutil.unhidehashlikerevs(repo, [node], b'nowarn')
     ctx = logcmdutil.revsingle(repo, node)
     mf = ctx.manifest()
     ui.pager(b'manifest')
     for f in ctx:
         fm.startitem()
         fm.context(ctx=ctx)
         fl = ctx[f].flags()
         fm.condwrite(ui.debugflag, b'hash', b'%s ', hex(mf[f]))
         fm.condwrite(ui.verbose, b'mode type', b'%s %1s ', mode[fl], char[fl])
         fm.write(b'path', b'%s\n', f)
     fm.end()
 
 
 @command(
     b'merge',
     [
         (
             b'f',
             b'force',
             None,
             _(b'force a merge including outstanding changes (DEPRECATED)'),
         ),
         (b'r', b'rev', b'', _(b'revision to merge'), _(b'REV')),
         (
             b'P',
             b'preview',
             None,
             _(b'review revisions to merge (no merge is performed)'),
         ),
         (b'', b'abort', None, _(b'abort the ongoing merge')),
     ]
     + mergetoolopts,
     _(b'[-P] [[-r] REV]'),
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
     helpbasic=True,
 )
 def merge(ui, repo, node=None, **opts):
     """merge another revision into working directory
 
     The current working directory is updated with all changes made in
     the requested revision since the last common predecessor revision.
 
     Files that changed between either parent are marked as changed for
     the next commit and a commit must be performed before any further
     updates to the repository are allowed. The next commit will have
     two parents.
 
     ``--tool`` can be used to specify the merge tool used for file
     merges. It overrides the HGMERGE environment variable and your
     configuration files. See :hg:`help merge-tools` for options.
 
     If no revision is specified, the working directory's parent is a
     head revision, and the current branch contains exactly one other
     head, the other head is merged with by default. Otherwise, an
     explicit revision with which to merge must be provided.
 
     See :hg:`help resolve` for information on handling file conflicts.
 
     To undo an uncommitted merge, use :hg:`merge --abort` which
     will check out a clean copy of the original merge parent, losing
     all changes.
 
     Returns 0 on success, 1 if there are unresolved files.
     """
 
     opts = pycompat.byteskwargs(opts)
     abort = opts.get(b'abort')
     if abort and repo.dirstate.p2() == repo.nullid:
         cmdutil.wrongtooltocontinue(repo, _(b'merge'))
     cmdutil.check_incompatible_arguments(opts, b'abort', [b'rev', b'preview'])
     if abort:
         state = cmdutil.getunfinishedstate(repo)
         if state and state._opname != b'merge':
             raise error.StateError(
                 _(b'cannot abort merge with %s in progress') % (state._opname),
                 hint=state.hint(),
             )
         if node:
             raise error.InputError(_(b"cannot specify a node with --abort"))
         return hg.abortmerge(repo.ui, repo)
 
     if opts.get(b'rev') and node:
         raise error.InputError(_(b"please specify just one revision"))
     if not node:
         node = opts.get(b'rev')
 
     if node:
         ctx = logcmdutil.revsingle(repo, node)
     else:
         if ui.configbool(b'commands', b'merge.require-rev'):
             raise error.InputError(
                 _(
                     b'configuration requires specifying revision to merge '
                     b'with'
                 )
             )
         ctx = repo[destutil.destmerge(repo)]
 
     if ctx.node() is None:
         raise error.InputError(
             _(b'merging with the working copy has no effect')
         )
 
     if opts.get(b'preview'):
         # find nodes that are ancestors of p2 but not of p1
         p1 = repo[b'.'].node()
         p2 = ctx.node()
         nodes = repo.changelog.findmissing(common=[p1], heads=[p2])
 
         displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
         for node in nodes:
             displayer.show(repo[node])
         displayer.close()
         return 0
 
     # ui.forcemerge is an internal variable, do not document
     overrides = {(b'ui', b'forcemerge'): opts.get(b'tool', b'')}
     with ui.configoverride(overrides, b'merge'):
         force = opts.get(b'force')
         labels = [b'working copy', b'merge rev']
         return hg.merge(ctx, force=force, labels=labels)
 
 
 statemod.addunfinished(
     b'merge',
     fname=None,
     clearable=True,
     allowcommit=True,
     cmdmsg=_(b'outstanding uncommitted merge'),
     abortfunc=hg.abortmerge,
     statushint=_(
         b'To continue:    hg commit\nTo abort:       hg merge --abort'
     ),
     cmdhint=_(b"use 'hg commit' or 'hg merge --abort'"),
 )
 
 
 @command(
     b'outgoing|out',
     [
         (
             b'f',
             b'force',
             None,
             _(b'run even when the destination is unrelated'),
         ),
         (
             b'r',
             b'rev',
             [],
             _(b'a changeset intended to be included in the destination'),
             _(b'REV'),
         ),
         (b'n', b'newest-first', None, _(b'show newest record first')),
         (b'B', b'bookmarks', False, _(b'compare bookmarks')),
         (
             b'b',
             b'branch',
             [],
             _(b'a specific branch you would like to push'),
             _(b'BRANCH'),
         ),
     ]
     + logopts
     + remoteopts
     + subrepoopts,
     _(b'[-M] [-p] [-n] [-f] [-r REV]... [DEST]...'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
 )
 def outgoing(ui, repo, *dests, **opts):
     """show changesets not found in the destination
 
     Show changesets not found in the specified destination repository
     or the default push location. These are the changesets that would
     be pushed if a push was requested.
 
     See pull for details of valid destination formats.
 
     .. container:: verbose
 
       With -B/--bookmarks, the result of bookmark comparison between
       local and remote repositories is displayed. With -v/--verbose,
       status is also displayed for each bookmark like below::
 
         BM1               01234567890a added
         BM2                            deleted
         BM3               234567890abc advanced
         BM4               34567890abcd diverged
         BM5               4567890abcde changed
 
       The action taken when pushing depends on the
       status of each bookmark:
 
       :``added``: push with ``-B`` will create it
       :``deleted``: push with ``-B`` will delete it
       :``advanced``: push will update it
       :``diverged``: push with ``-B`` will update it
       :``changed``: push with ``-B`` will update it
 
       From the point of view of pushing behavior, bookmarks
       existing only in the remote repository are treated as
       ``deleted``, even if it is in fact added remotely.
 
     Returns 0 if there are outgoing changes, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get(b'bookmarks'):
         for path in urlutil.get_push_paths(repo, ui, dests):
             dest = path.pushloc or path.loc
             other = hg.peer(repo, opts, dest)
             try:
                 if b'bookmarks' not in other.listkeys(b'namespaces'):
                     ui.warn(_(b"remote doesn't support bookmarks\n"))
                     return 0
                 ui.status(
                     _(b'comparing with %s\n') % urlutil.hidepassword(dest)
                 )
                 ui.pager(b'outgoing')
                 return bookmarks.outgoing(ui, repo, other)
             finally:
                 other.close()
 
     return hg.outgoing(ui, repo, dests, opts)
 
 
 @command(
     b'parents',
     [
         (
             b'r',
             b'rev',
             b'',
             _(b'show parents of the specified revision'),
             _(b'REV'),
         ),
     ]
     + templateopts,
     _(b'[-r REV] [FILE]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     inferrepo=True,
 )
 def parents(ui, repo, file_=None, **opts):
     """show the parents of the working directory or revision (DEPRECATED)
 
     Print the working directory's parent revisions. If a revision is
     given via -r/--rev, the parent of that revision will be printed.
     If a file argument is given, the revision in which the file was
     last changed (before the working directory revision or the
     argument to --rev if given) is printed.
 
     This command is equivalent to::
 
         hg log -r "p1()+p2()" or
         hg log -r "p1(REV)+p2(REV)" or
         hg log -r "max(::p1() and file(FILE))+max(::p2() and file(FILE))" or
         hg log -r "max(::p1(REV) and file(FILE))+max(::p2(REV) and file(FILE))"
 
     See :hg:`summary` and :hg:`help revsets` for related information.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
     ctx = logcmdutil.revsingle(repo, rev, None)
 
     if file_:
         m = scmutil.match(ctx, (file_,), opts)
         if m.anypats() or len(m.files()) != 1:
             raise error.InputError(_(b'can only specify an explicit filename'))
         file_ = m.files()[0]
         filenodes = []
         for cp in ctx.parents():
             if not cp:
                 continue
             try:
                 filenodes.append(cp.filenode(file_))
             except error.LookupError:
                 pass
         if not filenodes:
             raise error.InputError(_(b"'%s' not found in manifest") % file_)
         p = []
         for fn in filenodes:
             fctx = repo.filectx(file_, fileid=fn)
             p.append(fctx.node())
     else:
         p = [cp.node() for cp in ctx.parents()]
 
     displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
     for n in p:
         if n != repo.nullid:
             displayer.show(repo[n])
     displayer.close()
 
 
 @command(
     b'paths',
     formatteropts,
     _(b'[NAME]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     optionalrepo=True,
     intents={INTENT_READONLY},
 )
 def paths(ui, repo, search=None, **opts):
     """show aliases for remote repositories
 
     Show definition of symbolic path name NAME. If no name is given,
     show definition of all available names.
 
     Option -q/--quiet suppresses all output when searching for NAME
     and shows only the path names when listing all definitions.
 
     Path names are defined in the [paths] section of your
     configuration file and in ``/etc/mercurial/hgrc``. If run inside a
     repository, ``.hg/hgrc`` is used, too.
 
     The path names ``default`` and ``default-push`` have a special
     meaning.  When performing a push or pull operation, they are used
     as fallbacks if no location is specified on the command-line.
     When ``default-push`` is set, it will be used for push and
     ``default`` will be used for pull; otherwise ``default`` is used
     as the fallback for both.  When cloning a repository, the clone
     source is written as ``default`` in ``.hg/hgrc``.
 
     .. note::
 
        ``default`` and ``default-push`` apply to all inbound (e.g.
        :hg:`incoming`) and outbound (e.g. :hg:`outgoing`, :hg:`email`
        and :hg:`bundle`) operations.
 
     See :hg:`help urls` for more information.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported. See also :hg:`help templates`.
 
       :name:    String. Symbolic name of the path alias.
       :pushurl: String. URL for push operations.
       :url:     String. URL or directory path for the other operations.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
 
     pathitems = urlutil.list_paths(ui, search)
     ui.pager(b'paths')
 
     fm = ui.formatter(b'paths', opts)
     if fm.isplain():
         hidepassword = urlutil.hidepassword
     else:
         hidepassword = bytes
     if ui.quiet:
         namefmt = b'%s\n'
     else:
         namefmt = b'%s = '
     showsubopts = not search and not ui.quiet
 
     for name, path in pathitems:
         fm.startitem()
         fm.condwrite(not search, b'name', namefmt, name)
         fm.condwrite(not ui.quiet, b'url', b'%s\n', hidepassword(path.rawloc))
         for subopt, value in sorted(path.suboptions.items()):
             assert subopt not in (b'name', b'url')
             if showsubopts:
                 fm.plain(b'%s:%s = ' % (name, subopt))
             if isinstance(value, bool):
                 if value:
                     value = b'yes'
                 else:
                     value = b'no'
             fm.condwrite(showsubopts, subopt, b'%s\n', value)
 
     fm.end()
 
     if search and not pathitems:
         if not ui.quiet:
             ui.warn(_(b"not found!\n"))
         return 1
     else:
         return 0
 
 
 @command(
     b'phase',
     [
         (b'p', b'public', False, _(b'set changeset phase to public')),
         (b'd', b'draft', False, _(b'set changeset phase to draft')),
         (b's', b'secret', False, _(b'set changeset phase to secret')),
         (b'f', b'force', False, _(b'allow to move boundary backward')),
         (b'r', b'rev', [], _(b'target revision'), _(b'REV')),
     ],
     _(b'[-p|-d|-s] [-f] [-r] [REV...]'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
 )
 def phase(ui, repo, *revs, **opts):
     """set or show the current phase name
 
     With no argument, show the phase name of the current revision(s).
 
     With one of -p/--public, -d/--draft or -s/--secret, change the
     phase value of the specified revisions.
 
     Unless -f/--force is specified, :hg:`phase` won't move changesets from a
     lower phase to a higher phase. Phases are ordered as follows::
 
         public < draft < secret
 
     Returns 0 on success, 1 if some phases could not be changed.
 
     (For more information about the phases concept, see :hg:`help phases`.)
     """
     opts = pycompat.byteskwargs(opts)
     # search for a unique phase argument
     targetphase = None
     for idx, name in enumerate(phases.cmdphasenames):
         if opts[name]:
             if targetphase is not None:
                 raise error.InputError(_(b'only one phase can be specified'))
             targetphase = idx
 
     # look for specified revision
     revs = list(revs)
     revs.extend(opts[b'rev'])
     if revs:
         revs = logcmdutil.revrange(repo, revs)
     else:
         # display both parents as the second parent phase can influence
         # the phase of a merge commit
         revs = [c.rev() for c in repo[None].parents()]
 
     ret = 0
     if targetphase is None:
         # display
         for r in revs:
             ctx = repo[r]
             ui.write(b'%i: %s\n' % (ctx.rev(), ctx.phasestr()))
     else:
         with repo.lock(), repo.transaction(b"phase") as tr:
             # set phase
             if not revs:
                 raise error.InputError(_(b'empty revision set'))
             nodes = [repo[r].node() for r in revs]
             # moving revision from public to draft may hide them
             # We have to check result on an unfiltered repository
             unfi = repo.unfiltered()
             getphase = unfi._phasecache.phase
             olddata = [getphase(unfi, r) for r in unfi]
             phases.advanceboundary(repo, tr, targetphase, nodes)
             if opts[b'force']:
                 phases.retractboundary(repo, tr, targetphase, nodes)
         getphase = unfi._phasecache.phase
         newdata = [getphase(unfi, r) for r in unfi]
         changes = sum(newdata[r] != olddata[r] for r in unfi)
         cl = unfi.changelog
         rejected = [n for n in nodes if newdata[cl.rev(n)] < targetphase]
         if rejected:
             ui.warn(
                 _(
                     b'cannot move %i changesets to a higher '
                     b'phase, use --force\n'
                 )
                 % len(rejected)
             )
             ret = 1
         if changes:
             msg = _(b'phase changed for %i changesets\n') % changes
             if ret:
                 ui.status(msg)
             else:
                 ui.note(msg)
         else:
             ui.warn(_(b'no phases changed\n'))
     return ret
 
 
 def postincoming(ui, repo, modheads, optupdate, checkout, brev):
     """Run after a changegroup has been added via pull/unbundle
 
     This takes arguments below:
 
     :modheads: change of heads by pull/unbundle
     :optupdate: updating working directory is needed or not
     :checkout: update destination revision (or None to default destination)
     :brev: a name, which might be a bookmark to be activated after updating
 
     return True if update raise any conflict, False otherwise.
     """
     if modheads == 0:
         return False
     if optupdate:
         try:
             return hg.updatetotally(ui, repo, checkout, brev)
         except error.UpdateAbort as inst:
             msg = _(b"not updating: %s") % stringutil.forcebytestr(inst)
             hint = inst.hint
             raise error.UpdateAbort(msg, hint=hint)
     if modheads is not None and modheads > 1:
         currentbranchheads = len(repo.branchheads())
         if currentbranchheads == modheads:
             ui.status(
                 _(b"(run 'hg heads' to see heads, 'hg merge' to merge)\n")
             )
         elif currentbranchheads > 1:
             ui.status(
                 _(b"(run 'hg heads .' to see heads, 'hg merge' to merge)\n")
             )
         else:
             ui.status(_(b"(run 'hg heads' to see heads)\n"))
     elif not ui.configbool(b'commands', b'update.requiredest'):
         ui.status(_(b"(run 'hg update' to get a working copy)\n"))
     return False
 
 
 @command(
     b'pull',
     [
         (
             b'u',
             b'update',
             None,
             _(b'update to new branch head if new descendants were pulled'),
         ),
         (
             b'f',
             b'force',
             None,
             _(b'run even when remote repository is unrelated'),
         ),
         (
             b'',
             b'confirm',
             None,
             _(b'confirm pull before applying changes'),
         ),
         (
             b'r',
             b'rev',
             [],
             _(b'a remote changeset intended to be added'),
             _(b'REV'),
         ),
         (b'B', b'bookmark', [], _(b"bookmark to pull"), _(b'BOOKMARK')),
         (
             b'b',
             b'branch',
             [],
             _(b'a specific branch you would like to pull'),
             _(b'BRANCH'),
         ),
     ]
     + remoteopts,
     _(b'[-u] [-f] [-r REV]... [-e CMD] [--remotecmd CMD] [SOURCE]...'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     helpbasic=True,
 )
 def pull(ui, repo, *sources, **opts):
     """pull changes from the specified source
 
     Pull changes from a remote repository to a local one.
 
     This finds all changes from the repository at the specified path
     or URL and adds them to a local repository (the current one unless
     -R is specified). By default, this does not update the copy of the
     project in the working directory.
 
     When cloning from servers that support it, Mercurial may fetch
     pre-generated data. When this is done, hooks operating on incoming
     changesets and changegroups may fire more than once, once for each
     pre-generated bundle and as well as for any additional remaining
     data. See :hg:`help -e clonebundles` for more.
 
     Use :hg:`incoming` if you want to see what would have been added
     by a pull at the time you issued this command. If you then decide
     to add those changes to the repository, you should use :hg:`pull
     -r X` where ``X`` is the last changeset listed by :hg:`incoming`.
 
     If SOURCE is omitted, the 'default' path will be used.
     See :hg:`help urls` for more information.
 
     If multiple sources are specified, they will be pulled sequentially as if
     the command was run multiple time. If --update is specify and the command
     will stop at the first failed --update.
 
     Specifying bookmark as ``.`` is equivalent to specifying the active
     bookmark's name.
 
     Returns 0 on success, 1 if an update had unresolved files.
     """
 
     opts = pycompat.byteskwargs(opts)
     if ui.configbool(b'commands', b'update.requiredest') and opts.get(
         b'update'
     ):
         msg = _(b'update destination required by configuration')
         hint = _(b'use hg pull followed by hg update DEST')
         raise error.InputError(msg, hint=hint)
 
     for path in urlutil.get_pull_paths(repo, ui, sources):
         source, branches = urlutil.parseurl(path.rawloc, opts.get(b'branch'))
         ui.status(_(b'pulling from %s\n') % urlutil.hidepassword(source))
         ui.flush()
         other = hg.peer(repo, opts, source)
         update_conflict = None
         try:
             revs, checkout = hg.addbranchrevs(
                 repo, other, branches, opts.get(b'rev')
             )
 
             pullopargs = {}
 
             nodes = None
             if opts.get(b'bookmark') or revs:
                 # The list of bookmark used here is the same used to actually update
                 # the bookmark names, to avoid the race from issue 4689 and we do
                 # all lookup and bookmark queries in one go so they see the same
                 # version of the server state (issue 4700).
                 nodes = []
                 fnodes = []
                 revs = revs or []
                 if revs and not other.capable(b'lookup'):
                     err = _(
                         b"other repository doesn't support revision lookup, "
                         b"so a rev cannot be specified."
                     )
                     raise error.Abort(err)
                 with other.commandexecutor() as e:
                     fremotebookmarks = e.callcommand(
                         b'listkeys', {b'namespace': b'bookmarks'}
                     )
                     for r in revs:
                         fnodes.append(e.callcommand(b'lookup', {b'key': r}))
                 remotebookmarks = fremotebookmarks.result()
                 remotebookmarks = bookmarks.unhexlifybookmarks(remotebookmarks)
                 pullopargs[b'remotebookmarks'] = remotebookmarks
                 for b in opts.get(b'bookmark', []):
                     b = repo._bookmarks.expandname(b)
                     if b not in remotebookmarks:
                         raise error.InputError(
                             _(b'remote bookmark %s not found!') % b
                         )
                     nodes.append(remotebookmarks[b])
                 for i, rev in enumerate(revs):
                     node = fnodes[i].result()
                     nodes.append(node)
                     if rev == checkout:
                         checkout = node
 
             wlock = util.nullcontextmanager()
             if opts.get(b'update'):
                 wlock = repo.wlock()
             with wlock:
                 pullopargs.update(opts.get(b'opargs', {}))
                 modheads = exchange.pull(
                     repo,
                     other,
                     path=path,
                     heads=nodes,
                     force=opts.get(b'force'),
                     bookmarks=opts.get(b'bookmark', ()),
                     opargs=pullopargs,
                     confirm=opts.get(b'confirm'),
                 ).cgresult
 
                 # brev is a name, which might be a bookmark to be activated at
                 # the end of the update. In other words, it is an explicit
                 # destination of the update
                 brev = None
 
                 if checkout:
                     checkout = repo.unfiltered().changelog.rev(checkout)
 
                     # order below depends on implementation of
                     # hg.addbranchrevs(). opts['bookmark'] is ignored,
                     # because 'checkout' is determined without it.
                     if opts.get(b'rev'):
                         brev = opts[b'rev'][0]
                     elif opts.get(b'branch'):
                         brev = opts[b'branch'][0]
                     else:
                         brev = branches[0]
                 repo._subtoppath = source
                 try:
                     update_conflict = postincoming(
                         ui, repo, modheads, opts.get(b'update'), checkout, brev
                     )
                 except error.FilteredRepoLookupError as exc:
                     msg = _(b'cannot update to target: %s') % exc.args[0]
                     exc.args = (msg,) + exc.args[1:]
                     raise
                 finally:
                     del repo._subtoppath
 
         finally:
             other.close()
         # skip the remaining pull source if they are some conflict.
         if update_conflict:
             break
     if update_conflict:
         return 1
     else:
         return 0
 
 
 @command(
     b'purge|clean',
     [
         (b'a', b'abort-on-err', None, _(b'abort if an error occurs')),
         (b'', b'all', None, _(b'purge ignored files too')),
         (b'i', b'ignored', None, _(b'purge only ignored files')),
         (b'', b'dirs', None, _(b'purge empty directories')),
         (b'', b'files', None, _(b'purge files')),
         (b'p', b'print', None, _(b'print filenames instead of deleting them')),
         (
             b'0',
             b'print0',
             None,
             _(
                 b'end filenames with NUL, for use with xargs'
                 b' (implies -p/--print)'
             ),
         ),
         (b'', b'confirm', None, _(b'ask before permanently deleting files')),
     ]
     + cmdutil.walkopts,
     _(b'hg purge [OPTION]... [DIR]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def purge(ui, repo, *dirs, **opts):
     """removes files not tracked by Mercurial
 
     Delete files not known to Mercurial. This is useful to test local
     and uncommitted changes in an otherwise-clean source tree.
 
     This means that purge will delete the following by default:
 
     - Unknown files: files marked with "?" by :hg:`status`
     - Empty directories: in fact Mercurial ignores directories unless
       they contain files under source control management
 
     But it will leave untouched:
 
     - Modified and unmodified tracked files
     - Ignored files (unless -i or --all is specified)
     - New files added to the repository (with :hg:`add`)
 
     The --files and --dirs options can be used to direct purge to delete
     only files, only directories, or both. If neither option is given,
     both will be deleted.
 
     If directories are given on the command line, only files in these
     directories are considered.
 
     Be careful with purge, as you could irreversibly delete some files
     you forgot to add to the repository. If you only want to print the
     list of files that this program would delete, use the --print
     option.
     """
     opts = pycompat.byteskwargs(opts)
     cmdutil.check_at_most_one_arg(opts, b'all', b'ignored')
 
     act = not opts.get(b'print')
     eol = b'\n'
     if opts.get(b'print0'):
         eol = b'\0'
         act = False  # --print0 implies --print
     if opts.get(b'all', False):
         ignored = True
         unknown = True
     else:
         ignored = opts.get(b'ignored', False)
         unknown = not ignored
 
     removefiles = opts.get(b'files')
     removedirs = opts.get(b'dirs')
     confirm = opts.get(b'confirm')
     if confirm is None:
         try:
             extensions.find(b'purge')
             confirm = False
         except KeyError:
             confirm = True
 
     if not removefiles and not removedirs:
         removefiles = True
         removedirs = True
 
     match = scmutil.match(repo[None], dirs, opts)
 
     paths = mergemod.purge(
         repo,
         match,
         unknown=unknown,
         ignored=ignored,
         removeemptydirs=removedirs,
         removefiles=removefiles,
         abortonerror=opts.get(b'abort_on_err'),
         noop=not act,
         confirm=confirm,
     )
 
     for path in paths:
         if not act:
             ui.write(b'%s%s' % (path, eol))
 
 
 @command(
     b'push',
     [
         (b'f', b'force', None, _(b'force push')),
         (
             b'r',
             b'rev',
             [],
             _(b'a changeset intended to be included in the destination'),
             _(b'REV'),
         ),
         (b'B', b'bookmark', [], _(b"bookmark to push"), _(b'BOOKMARK')),
         (b'', b'all-bookmarks', None, _(b"push all bookmarks (EXPERIMENTAL)")),
         (
             b'b',
             b'branch',
             [],
             _(b'a specific branch you would like to push'),
             _(b'BRANCH'),
         ),
         (b'', b'new-branch', False, _(b'allow pushing a new branch')),
         (
             b'',
             b'pushvars',
             [],
             _(b'variables that can be sent to server (ADVANCED)'),
         ),
         (
             b'',
             b'publish',
             False,
             _(b'push the changeset as public (EXPERIMENTAL)'),
         ),
     ]
     + remoteopts,
     _(b'[-f] [-r REV]... [-e CMD] [--remotecmd CMD] [DEST]...'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     helpbasic=True,
 )
 def push(ui, repo, *dests, **opts):
     """push changes to the specified destination
 
     Push changesets from the local repository to the specified
     destination.
 
     This operation is symmetrical to pull: it is identical to a pull
     in the destination repository from the current one.
 
     By default, push will not allow creation of new heads at the
     destination, since multiple heads would make it unclear which head
     to use. In this situation, it is recommended to pull and merge
     before pushing.
 
     Use --new-branch if you want to allow push to create a new named
     branch that is not present at the destination. This allows you to
     only create a new branch without forcing other changes.
 
     .. note::
 
        Extra care should be taken with the -f/--force option,
        which will push all new heads on all branches, an action which will
        almost always cause confusion for collaborators.
 
     If -r/--rev is used, the specified revision and all its ancestors
     will be pushed to the remote repository.
 
     If -B/--bookmark is used, the specified bookmarked revision, its
     ancestors, and the bookmark will be pushed to the remote
     repository. Specifying ``.`` is equivalent to specifying the active
     bookmark's name. Use the --all-bookmarks option for pushing all
     current bookmarks.
 
     Please see :hg:`help urls` for important details about ``ssh://``
     URLs. If DESTINATION is omitted, a default path will be used.
 
     When passed multiple destinations, push will process them one after the
     other, but stop should an error occur.
 
     .. container:: verbose
 
         The --pushvars option sends strings to the server that become
         environment variables prepended with ``HG_USERVAR_``. For example,
         ``--pushvars ENABLE_FEATURE=true``, provides the server side hooks with
         ``HG_USERVAR_ENABLE_FEATURE=true`` as part of their environment.
 
         pushvars can provide for user-overridable hooks as well as set debug
         levels. One example is having a hook that blocks commits containing
         conflict markers, but enables the user to override the hook if the file
         is using conflict markers for testing purposes or the file format has
         strings that look like conflict markers.
 
         By default, servers will ignore `--pushvars`. To enable it add the
         following to your configuration file::
 
             [push]
             pushvars.server = true
 
     Returns 0 if push was successful, 1 if nothing to push.
     """
 
     opts = pycompat.byteskwargs(opts)
 
     if opts.get(b'all_bookmarks'):
         cmdutil.check_incompatible_arguments(
             opts,
             b'all_bookmarks',
             [b'bookmark', b'rev'],
         )
         opts[b'bookmark'] = list(repo._bookmarks)
 
     if opts.get(b'bookmark'):
         ui.setconfig(b'bookmarks', b'pushing', opts[b'bookmark'], b'push')
         for b in opts[b'bookmark']:
             # translate -B options to -r so changesets get pushed
             b = repo._bookmarks.expandname(b)
             if b in repo._bookmarks:
                 opts.setdefault(b'rev', []).append(b)
             else:
                 # if we try to push a deleted bookmark, translate it to null
                 # this lets simultaneous -r, -b options continue working
                 opts.setdefault(b'rev', []).append(b"null")
 
     some_pushed = False
     result = 0
     for path in urlutil.get_push_paths(repo, ui, dests):
         dest = path.pushloc or path.loc
         branches = (path.branch, opts.get(b'branch') or [])
         ui.status(_(b'pushing to %s\n') % urlutil.hidepassword(dest))
         revs, checkout = hg.addbranchrevs(
             repo, repo, branches, opts.get(b'rev')
         )
         other = hg.peer(repo, opts, dest)
 
         try:
             if revs:
                 revs = [repo[r].node() for r in logcmdutil.revrange(repo, revs)]
                 if not revs:
                     raise error.InputError(
                         _(b"specified revisions evaluate to an empty set"),
                         hint=_(b"use different revision arguments"),
                     )
             elif path.pushrev:
                 # It doesn't make any sense to specify ancestor revisions. So limit
                 # to DAG heads to make discovery simpler.
                 expr = revsetlang.formatspec(b'heads(%r)', path.pushrev)
                 revs = scmutil.revrange(repo, [expr])
                 revs = [repo[rev].node() for rev in revs]
                 if not revs:
                     raise error.InputError(
                         _(
                             b'default push revset for path evaluates to an empty set'
                         )
                     )
             elif ui.configbool(b'commands', b'push.require-revs'):
                 raise error.InputError(
                     _(b'no revisions specified to push'),
                     hint=_(b'did you mean "hg push -r ."?'),
                 )
 
             repo._subtoppath = dest
             try:
                 # push subrepos depth-first for coherent ordering
                 c = repo[b'.']
                 subs = c.substate  # only repos that are committed
                 for s in sorted(subs):
                     sub_result = c.sub(s).push(opts)
                     if sub_result == 0:
                         return 1
             finally:
                 del repo._subtoppath
 
             opargs = dict(
                 opts.get(b'opargs', {})
             )  # copy opargs since we may mutate it
             opargs.setdefault(b'pushvars', []).extend(opts.get(b'pushvars', []))
 
             pushop = exchange.push(
                 repo,
                 other,
                 opts.get(b'force'),
                 revs=revs,
                 newbranch=opts.get(b'new_branch'),
                 bookmarks=opts.get(b'bookmark', ()),
                 publish=opts.get(b'publish'),
                 opargs=opargs,
             )
 
             if pushop.cgresult == 0:
                 result = 1
             elif pushop.cgresult is not None:
                 some_pushed = True
 
             if pushop.bkresult is not None:
                 if pushop.bkresult == 2:
                     result = 2
                 elif not result and pushop.bkresult:
                     result = 2
 
             if result:
                 break
 
         finally:
             other.close()
     if result == 0 and not some_pushed:
         result = 1
     return result
 
 
 @command(
     b'recover',
     [
         (b'', b'verify', False, b"run `hg verify` after successful recover"),
     ],
     helpcategory=command.CATEGORY_MAINTENANCE,
 )
 def recover(ui, repo, **opts):
     """roll back an interrupted transaction
 
     Recover from an interrupted commit or pull.
 
     This command tries to fix the repository status after an
     interrupted operation. It should only be necessary when Mercurial
     suggests it.
 
     Returns 0 if successful, 1 if nothing to recover or verify fails.
     """
     ret = repo.recover()
     if ret:
         if opts['verify']:
             return hg.verify(repo)
         else:
             msg = _(
                 b"(verify step skipped, run `hg verify` to check your "
                 b"repository content)\n"
             )
             ui.warn(msg)
             return 0
     return 1
 
 
 @command(
     b'remove|rm',
     [
         (b'A', b'after', None, _(b'record delete for missing files')),
         (b'f', b'force', None, _(b'forget added files, delete modified files')),
     ]
     + subrepoopts
     + walkopts
     + dryrunopts,
     _(b'[OPTION]... FILE...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
     inferrepo=True,
 )
 def remove(ui, repo, *pats, **opts):
     """remove the specified files on the next commit
 
     Schedule the indicated files for removal from the current branch.
 
     This command schedules the files to be removed at the next commit.
     To undo a remove before that, see :hg:`revert`. To undo added
     files, see :hg:`forget`.
 
     .. container:: verbose
 
       -A/--after can be used to remove only files that have already
       been deleted, -f/--force can be used to force deletion, and -Af
       can be used to remove files from the next revision without
       deleting them from the working directory.
 
       The following table details the behavior of remove for different
       file states (columns) and option combinations (rows). The file
       states are Added [A], Clean [C], Modified [M] and Missing [!]
       (as reported by :hg:`status`). The actions are Warn, Remove
       (from branch) and Delete (from disk):
 
       ========= == == == ==
       opt/state A  C  M  !
       ========= == == == ==
       none      W  RD W  R
       -f        R  RD RD R
       -A        W  W  W  R
       -Af       R  R  R  R
       ========= == == == ==
 
       .. note::
 
          :hg:`remove` never deletes files in Added [A] state from the
          working directory, not even if ``--force`` is specified.
 
     Returns 0 on success, 1 if any warnings encountered.
     """
 
     opts = pycompat.byteskwargs(opts)
     after, force = opts.get(b'after'), opts.get(b'force')
     dryrun = opts.get(b'dry_run')
     if not pats and not after:
         raise error.InputError(_(b'no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     subrepos = opts.get(b'subrepos')
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     return cmdutil.remove(
         ui, repo, m, b"", uipathfn, after, force, subrepos, dryrun=dryrun
     )
 
 
 @command(
     b'rename|move|mv',
     [
         (b'', b'forget', None, _(b'unmark a destination file as renamed')),
         (b'A', b'after', None, _(b'record a rename that has already occurred')),
         (
             b'',
             b'at-rev',
             b'',
             _(b'(un)mark renames in the given revision (EXPERIMENTAL)'),
             _(b'REV'),
         ),
         (
             b'f',
             b'force',
             None,
             _(b'forcibly move over an existing managed file'),
         ),
     ]
     + walkopts
     + dryrunopts,
     _(b'[OPTION]... SOURCE... DEST'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def rename(ui, repo, *pats, **opts):
     """rename files; equivalent of copy + remove
 
     Mark dest as copies of sources; mark sources for deletion. If dest
     is a directory, copies are put in that directory. If dest is a
     file, there can only be one source.
 
     By default, this command copies the contents of files as they
     exist in the working directory. If invoked with -A/--after, the
     operation is recorded, but no copying is performed.
 
     To undo marking a destination file as renamed, use --forget. With that
     option, all given (positional) arguments are unmarked as renames. The
     destination file(s) will be left in place (still tracked). The source
     file(s) will not be restored. Note that :hg:`rename --forget` behaves
     the same way as :hg:`copy --forget`.
 
     This command takes effect with the next commit by default.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     opts = pycompat.byteskwargs(opts)
     with repo.wlock():
         return cmdutil.copy(ui, repo, pats, opts, rename=True)
 
 
 @command(
     b'resolve',
     [
         (b'a', b'all', None, _(b'select all unresolved files')),
         (b'l', b'list', None, _(b'list state of files needing merge')),
         (b'm', b'mark', None, _(b'mark files as resolved')),
         (b'u', b'unmark', None, _(b'mark files as unresolved')),
         (b'n', b'no-status', None, _(b'hide status prefix')),
         (b'', b're-merge', None, _(b're-merge files')),
     ]
     + mergetoolopts
     + walkopts
     + formatteropts,
     _(b'[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     inferrepo=True,
 )
 def resolve(ui, repo, *pats, **opts):
     """redo merges or set/view the merge status of files
 
     Merges with unresolved conflicts are often the result of
     non-interactive merging using the ``internal:merge`` configuration
     setting, or a command-line merge tool like ``diff3``. The resolve
     command is used to manage the files involved in a merge, after
     :hg:`merge` has been run, and before :hg:`commit` is run (i.e. the
     working directory must have two parents). See :hg:`help
     merge-tools` for information on configuring merge tools.
 
     The resolve command can be used in the following ways:
 
     - :hg:`resolve [--re-merge] [--tool TOOL] FILE...`: attempt to re-merge
       the specified files, discarding any previous merge attempts. Re-merging
       is not performed for files already marked as resolved. Use ``--all/-a``
       to select all unresolved files. ``--tool`` can be used to specify
       the merge tool used for the given files. It overrides the HGMERGE
       environment variable and your configuration files.  Previous file
       contents are saved with a ``.orig`` suffix.
 
     - :hg:`resolve -m [FILE]`: mark a file as having been resolved
       (e.g. after having manually fixed-up the files). The default is
       to mark all unresolved files.
 
     - :hg:`resolve -u [FILE]...`: mark a file as unresolved. The
       default is to mark all resolved files.
 
     - :hg:`resolve -l`: list files which had or still have conflicts.
       In the printed list, ``U`` = unresolved and ``R`` = resolved.
       You can use ``set:unresolved()`` or ``set:resolved()`` to filter
       the list. See :hg:`help filesets` for details.
 
     .. note::
 
        Mercurial will not let you commit files with unresolved merge
        conflicts. You must use :hg:`resolve -m ...` before you can
        commit after a conflicting merge.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :mergestatus: String. Character denoting merge conflicts, ``U`` or ``R``.
       :path:    String. Repository-absolute path of the file.
 
     Returns 0 on success, 1 if any files fail a resolve attempt.
     """
 
     opts = pycompat.byteskwargs(opts)
     confirm = ui.configbool(b'commands', b'resolve.confirm')
     flaglist = b'all mark unmark list no_status re_merge'.split()
     all, mark, unmark, show, nostatus, remerge = [opts.get(o) for o in flaglist]
 
     actioncount = len(list(filter(None, [show, mark, unmark, remerge])))
     if actioncount > 1:
         raise error.InputError(_(b"too many actions specified"))
     elif actioncount == 0 and ui.configbool(
         b'commands', b'resolve.explicit-re-merge'
     ):
         hint = _(b'use --mark, --unmark, --list or --re-merge')
         raise error.InputError(_(b'no action specified'), hint=hint)
     if pats and all:
         raise error.InputError(_(b"can't specify --all and patterns"))
     if not (all or pats or show or mark or unmark):
         raise error.InputError(
             _(b'no files or directories specified'),
             hint=b'use --all to re-merge all unresolved files',
         )
 
     if confirm:
         if all:
             if ui.promptchoice(
                 _(b're-merge all unresolved files (yn)?$$ &Yes $$ &No')
             ):
                 raise error.CanceledError(_(b'user quit'))
         if mark and not pats:
             if ui.promptchoice(
                 _(
                     b'mark all unresolved files as resolved (yn)?'
                     b'$$ &Yes $$ &No'
                 )
             ):
                 raise error.CanceledError(_(b'user quit'))
         if unmark and not pats:
             if ui.promptchoice(
                 _(
                     b'mark all resolved files as unresolved (yn)?'
                     b'$$ &Yes $$ &No'
                 )
             ):
                 raise error.CanceledError(_(b'user quit'))
 
     uipathfn = scmutil.getuipathfn(repo)
 
     if show:
         ui.pager(b'resolve')
         fm = ui.formatter(b'resolve', opts)
         ms = mergestatemod.mergestate.read(repo)
         wctx = repo[None]
         m = scmutil.match(wctx, pats, opts)
 
         # Labels and keys based on merge state.  Unresolved path conflicts show
         # as 'P'.  Resolved path conflicts show as 'R', the same as normal
         # resolved conflicts.
         mergestateinfo = {
             mergestatemod.MERGE_RECORD_UNRESOLVED: (
                 b'resolve.unresolved',
                 b'U',
             ),
             mergestatemod.MERGE_RECORD_RESOLVED: (b'resolve.resolved', b'R'),
             mergestatemod.MERGE_RECORD_UNRESOLVED_PATH: (
                 b'resolve.unresolved',
                 b'P',
             ),
             mergestatemod.MERGE_RECORD_RESOLVED_PATH: (
                 b'resolve.resolved',
                 b'R',
             ),
         }
 
         for f in ms:
             if not m(f):
                 continue
 
             label, key = mergestateinfo[ms[f]]
             fm.startitem()
             fm.context(ctx=wctx)
             fm.condwrite(not nostatus, b'mergestatus', b'%s ', key, label=label)
             fm.data(path=f)
             fm.plain(b'%s\n' % uipathfn(f), label=label)
         fm.end()
         return 0
 
     with repo.wlock():
         ms = mergestatemod.mergestate.read(repo)
 
         if not (ms.active() or repo.dirstate.p2() != repo.nullid):
             raise error.StateError(
                 _(b'resolve command not applicable when not merging')
             )
 
         wctx = repo[None]
         m = scmutil.match(wctx, pats, opts)
         ret = 0
         didwork = False
 
-        tocomplete = []
         hasconflictmarkers = []
         if mark:
             markcheck = ui.config(b'commands', b'resolve.mark-check')
             if markcheck not in [b'warn', b'abort']:
                 # Treat all invalid / unrecognized values as 'none'.
                 markcheck = False
         for f in ms:
             if not m(f):
                 continue
 
             didwork = True
 
             # path conflicts must be resolved manually
             if ms[f] in (
                 mergestatemod.MERGE_RECORD_UNRESOLVED_PATH,
                 mergestatemod.MERGE_RECORD_RESOLVED_PATH,
             ):
                 if mark:
                     ms.mark(f, mergestatemod.MERGE_RECORD_RESOLVED_PATH)
                 elif unmark:
                     ms.mark(f, mergestatemod.MERGE_RECORD_UNRESOLVED_PATH)
                 elif ms[f] == mergestatemod.MERGE_RECORD_UNRESOLVED_PATH:
                     ui.warn(
                         _(b'%s: path conflict must be resolved manually\n')
                         % uipathfn(f)
                     )
                 continue
 
             if mark:
                 if markcheck:
                     fdata = repo.wvfs.tryread(f)
                     if (
                         filemerge.hasconflictmarkers(fdata)
                         and ms[f] != mergestatemod.MERGE_RECORD_RESOLVED
                     ):
                         hasconflictmarkers.append(f)
                 ms.mark(f, mergestatemod.MERGE_RECORD_RESOLVED)
             elif unmark:
                 ms.mark(f, mergestatemod.MERGE_RECORD_UNRESOLVED)
             else:
                 # backup pre-resolve (merge uses .orig for its own purposes)
                 a = repo.wjoin(f)
                 try:
                     util.copyfile(a, a + b".resolve")
                 except (IOError, OSError) as inst:
                     if inst.errno != errno.ENOENT:
                         raise
 
                 try:
                     # preresolve file
                     overrides = {(b'ui', b'forcemerge'): opts.get(b'tool', b'')}
                     with ui.configoverride(overrides, b'resolve'):
-                        complete, r = ms.preresolve(f, wctx)
-                    if not complete:
-                        tocomplete.append(f)
-                    elif r:
+                        r = ms.resolve(f, wctx)
+                    if r:
                         ret = 1
                 finally:
                     ms.commit()
 
-                # replace filemerge's .orig file with our resolve file, but only
-                # for merges that are complete
-                if complete:
+                # replace filemerge's .orig file with our resolve file
                     try:
                         util.rename(
                             a + b".resolve", scmutil.backuppath(ui, repo, f)
                         )
                     except OSError as inst:
                         if inst.errno != errno.ENOENT:
                             raise
 
         if hasconflictmarkers:
             ui.warn(
                 _(
                     b'warning: the following files still have conflict '
                     b'markers:\n'
                 )
                 + b''.join(
                     b'  ' + uipathfn(f) + b'\n' for f in hasconflictmarkers
                 )
             )
             if markcheck == b'abort' and not all and not pats:
                 raise error.StateError(
                     _(b'conflict markers detected'),
                     hint=_(b'use --all to mark anyway'),
                 )
 
-        for f in tocomplete:
-            try:
-                # resolve file
-                overrides = {(b'ui', b'forcemerge'): opts.get(b'tool', b'')}
-                with ui.configoverride(overrides, b'resolve'):
-                    r = ms.resolve(f, wctx)
-                if r:
-                    ret = 1
-            finally:
-                ms.commit()
-
-            # replace filemerge's .orig file with our resolve file
-            a = repo.wjoin(f)
-            try:
-                util.rename(a + b".resolve", scmutil.backuppath(ui, repo, f))
-            except OSError as inst:
-                if inst.errno != errno.ENOENT:
-                    raise
-
         ms.commit()
         branchmerge = repo.dirstate.p2() != repo.nullid
         # resolve is not doing a parent change here, however, `record updates`
         # will call some dirstate API that at intended for parent changes call.
         # Ideally we would not need this and could implement a lighter version
         # of the recordupdateslogic that will not have to deal with the part
         # related to parent changes. However this would requires that:
         # - we are sure we passed around enough information at update/merge
         #   time to no longer needs it at `hg resolve time`
         # - we are sure we store that information well enough to be able to reuse it
         # - we are the necessary logic to reuse it right.
         #
         # All this should eventually happens, but in the mean time, we use this
         # context manager slightly out of the context it should be.
         with repo.dirstate.parentchange():
             mergestatemod.recordupdates(repo, ms.actions(), branchmerge, None)
 
         if not didwork and pats:
             hint = None
             if not any([p for p in pats if p.find(b':') >= 0]):
                 pats = [b'path:%s' % p for p in pats]
                 m = scmutil.match(wctx, pats, opts)
                 for f in ms:
                     if not m(f):
                         continue
 
                     def flag(o):
                         if o == b're_merge':
                             return b'--re-merge '
                         return b'-%s ' % o[0:1]
 
                     flags = b''.join([flag(o) for o in flaglist if opts.get(o)])
                     hint = _(b"(try: hg resolve %s%s)\n") % (
                         flags,
                         b' '.join(pats),
                     )
                     break
             ui.warn(_(b"arguments do not match paths that need resolving\n"))
             if hint:
                 ui.warn(hint)
 
     unresolvedf = ms.unresolvedcount()
     if not unresolvedf:
         ui.status(_(b'(no more unresolved files)\n'))
         cmdutil.checkafterresolved(repo)
 
     return ret
 
 
 @command(
     b'revert',
     [
         (b'a', b'all', None, _(b'revert all changes when no arguments given')),
         (b'd', b'date', b'', _(b'tipmost revision matching date'), _(b'DATE')),
         (b'r', b'rev', b'', _(b'revert to the specified revision'), _(b'REV')),
         (b'C', b'no-backup', None, _(b'do not save backup copies of files')),
         (b'i', b'interactive', None, _(b'interactively select the changes')),
     ]
     + walkopts
     + dryrunopts,
     _(b'[OPTION]... [-r REV] [NAME]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def revert(ui, repo, *pats, **opts):
     """restore files to their checkout state
 
     .. note::
 
        To check out earlier revisions, you should use :hg:`update REV`.
        To cancel an uncommitted merge (and lose your changes),
        use :hg:`merge --abort`.
 
     With no revision specified, revert the specified files or directories
     to the contents they had in the parent of the working directory.
     This restores the contents of files to an unmodified
     state and unschedules adds, removes, copies, and renames. If the
     working directory has two parents, you must explicitly specify a
     revision.
 
     Using the -r/--rev or -d/--date options, revert the given files or
     directories to their states as of a specific revision. Because
     revert does not change the working directory parents, this will
     cause these files to appear modified. This can be helpful to "back
     out" some or all of an earlier change. See :hg:`backout` for a
     related method.
 
     Modified files are saved with a .orig suffix before reverting.
     To disable these backups, use --no-backup. It is possible to store
     the backup files in a custom directory relative to the root of the
     repository by setting the ``ui.origbackuppath`` configuration
     option.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help backout` for a way to reverse the effect of an
     earlier changeset.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     if opts.get(b"date"):
         cmdutil.check_incompatible_arguments(opts, b'date', [b'rev'])
         opts[b"rev"] = cmdutil.finddate(ui, repo, opts[b"date"])
 
     parent, p2 = repo.dirstate.parents()
     if not opts.get(b'rev') and p2 != repo.nullid:
         # revert after merge is a trap for new users (issue2915)
         raise error.InputError(
             _(b'uncommitted merge with no revision specified'),
             hint=_(b"use 'hg update' or see 'hg help revert'"),
         )
 
     rev = opts.get(b'rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
     ctx = logcmdutil.revsingle(repo, rev)
 
     if not (
         pats
         or opts.get(b'include')
         or opts.get(b'exclude')
         or opts.get(b'all')
         or opts.get(b'interactive')
     ):
         msg = _(b"no files or directories specified")
         if p2 != repo.nullid:
             hint = _(
                 b"uncommitted merge, use --all to discard all changes,"
                 b" or 'hg update -C .' to abort the merge"
             )
             raise error.InputError(msg, hint=hint)
         dirty = any(repo.status())
         node = ctx.node()
         if node != parent:
             if dirty:
                 hint = (
                     _(
                         b"uncommitted changes, use --all to discard all"
                         b" changes, or 'hg update %d' to update"
                     )
                     % ctx.rev()
                 )
             else:
                 hint = (
                     _(
                         b"use --all to revert all files,"
                         b" or 'hg update %d' to update"
                     )
                     % ctx.rev()
                 )
         elif dirty:
             hint = _(b"uncommitted changes, use --all to discard all changes")
         else:
             hint = _(b"use --all to revert all files")
         raise error.InputError(msg, hint=hint)
 
     return cmdutil.revert(ui, repo, ctx, *pats, **pycompat.strkwargs(opts))
 
 
 @command(
     b'rollback',
     dryrunopts + [(b'f', b'force', False, _(b'ignore safety measures'))],
     helpcategory=command.CATEGORY_MAINTENANCE,
 )
 def rollback(ui, repo, **opts):
     """roll back the last transaction (DANGEROUS) (DEPRECATED)
 
     Please use :hg:`commit --amend` instead of rollback to correct
     mistakes in the last commit.
 
     This command should be used with care. There is only one level of
     rollback, and there is no way to undo a rollback. It will also
     restore the dirstate at the time of the last transaction, losing
     any dirstate changes since that time. This command does not alter
     the working directory.
 
     Transactions are used to encapsulate the effects of all commands
     that create new changesets or propagate existing changesets into a
     repository.
 
     .. container:: verbose
 
       For example, the following commands are transactional, and their
       effects can be rolled back:
 
       - commit
       - import
       - pull
       - push (with this repository as the destination)
       - unbundle
 
       To avoid permanent data loss, rollback will refuse to rollback a
       commit transaction if it isn't checked out. Use --force to
       override this protection.
 
       The rollback command can be entirely disabled by setting the
       ``ui.rollback`` configuration setting to false. If you're here
       because you want to use rollback and it's disabled, you can
       re-enable the command by setting ``ui.rollback`` to true.
 
     This command is not intended for use on public repositories. Once
     changes are visible for pull by other users, rolling a transaction
     back locally is ineffective (someone else may already have pulled
     the changes). Furthermore, a race is possible with readers of the
     repository; for example an in-progress pull from the repository
     may fail if a rollback is performed.
 
     Returns 0 on success, 1 if no rollback data is available.
     """
     if not ui.configbool(b'ui', b'rollback'):
         raise error.Abort(
             _(b'rollback is disabled because it is unsafe'),
             hint=b'see `hg help -v rollback` for information',
         )
     return repo.rollback(dryrun=opts.get('dry_run'), force=opts.get('force'))
 
 
 @command(
     b'root',
     [] + formatteropts,
     intents={INTENT_READONLY},
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def root(ui, repo, **opts):
     """print the root (top) of the current working directory
 
     Print the root directory of the current repository.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :hgpath:    String. Path to the .hg directory.
       :storepath: String. Path to the directory holding versioned data.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     with ui.formatter(b'root', opts) as fm:
         fm.startitem()
         fm.write(b'reporoot', b'%s\n', repo.root)
         fm.data(hgpath=repo.path, storepath=repo.spath)
 
 
 @command(
     b'serve',
     [
         (
             b'A',
             b'accesslog',
             b'',
             _(b'name of access log file to write to'),
             _(b'FILE'),
         ),
         (b'd', b'daemon', None, _(b'run server in background')),
         (b'', b'daemon-postexec', [], _(b'used internally by daemon mode')),
         (
             b'E',
             b'errorlog',
             b'',
             _(b'name of error log file to write to'),
             _(b'FILE'),
         ),
         # use string type, then we can check if something was passed
         (
             b'p',
             b'port',
             b'',
             _(b'port to listen on (default: 8000)'),
             _(b'PORT'),
         ),
         (
             b'a',
             b'address',
             b'',
             _(b'address to listen on (default: all interfaces)'),
             _(b'ADDR'),
         ),
         (
             b'',
             b'prefix',
             b'',
             _(b'prefix path to serve from (default: server root)'),
             _(b'PREFIX'),
         ),
         (
             b'n',
             b'name',
             b'',
             _(b'name to show in web pages (default: working directory)'),
             _(b'NAME'),
         ),
         (
             b'',
             b'web-conf',
             b'',
             _(b"name of the hgweb config file (see 'hg help hgweb')"),
             _(b'FILE'),
         ),
         (
             b'',
             b'webdir-conf',
             b'',
             _(b'name of the hgweb config file (DEPRECATED)'),
             _(b'FILE'),
         ),
         (
             b'',
             b'pid-file',
             b'',
             _(b'name of file to write process ID to'),
             _(b'FILE'),
         ),
         (b'', b'stdio', None, _(b'for remote clients (ADVANCED)')),
         (
             b'',
             b'cmdserver',
             b'',
             _(b'for remote clients (ADVANCED)'),
             _(b'MODE'),
         ),
         (b't', b'templates', b'', _(b'web templates to use'), _(b'TEMPLATE')),
         (b'', b'style', b'', _(b'template style to use'), _(b'STYLE')),
         (b'6', b'ipv6', None, _(b'use IPv6 in addition to IPv4')),
         (b'', b'certificate', b'', _(b'SSL certificate file'), _(b'FILE')),
         (b'', b'print-url', None, _(b'start and print only the URL')),
     ]
     + subrepoopts,
     _(b'[OPTION]...'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     helpbasic=True,
     optionalrepo=True,
 )
 def serve(ui, repo, **opts):
     """start stand-alone webserver
 
     Start a local HTTP repository browser and pull server. You can use
     this for ad-hoc sharing and browsing of repositories. It is
     recommended to use a real web server to serve a repository for
     longer periods of time.
 
     Please note that the server does not implement access control.
     This means that, by default, anybody can read from the server and
     nobody can write to it by default. Set the ``web.allow-push``
     option to ``*`` to allow everybody to push to the server. You
     should use a real web server if you need to authenticate users.
 
     By default, the server logs accesses to stdout and errors to
     stderr. Use the -A/--accesslog and -E/--errorlog options to log to
     files.
 
     To have the server choose a free port number to listen on, specify
     a port number of 0; in this case, the server will print the port
     number it uses.
 
     Returns 0 on success.
     """
 
     cmdutil.check_incompatible_arguments(opts, 'stdio', ['cmdserver'])
     opts = pycompat.byteskwargs(opts)
     if opts[b"print_url"] and ui.verbose:
         raise error.InputError(_(b"cannot use --print-url with --verbose"))
 
     if opts[b"stdio"]:
         if repo is None:
             raise error.RepoError(
                 _(b"there is no Mercurial repository here (.hg not found)")
             )
         s = wireprotoserver.sshserver(ui, repo)
         s.serve_forever()
         return
 
     service = server.createservice(ui, repo, opts)
     return server.runservice(opts, initfn=service.init, runfn=service.run)
 
 
 @command(
     b'shelve',
     [
         (
             b'A',
             b'addremove',
             None,
             _(b'mark new/missing files as added/removed before shelving'),
         ),
         (b'u', b'unknown', None, _(b'store unknown files in the shelve')),
         (b'', b'cleanup', None, _(b'delete all shelved changes')),
         (
             b'',
             b'date',
             b'',
             _(b'shelve with the specified commit date'),
             _(b'DATE'),
         ),
         (b'd', b'delete', None, _(b'delete the named shelved change(s)')),
         (b'e', b'edit', False, _(b'invoke editor on commit messages')),
         (
             b'k',
             b'keep',
             False,
             _(b'shelve, but keep changes in the working directory'),
         ),
         (b'l', b'list', None, _(b'list current shelves')),
         (b'm', b'message', b'', _(b'use text as shelve message'), _(b'TEXT')),
         (
             b'n',
             b'name',
             b'',
             _(b'use the given name for the shelved commit'),
             _(b'NAME'),
         ),
         (
             b'p',
             b'patch',
             None,
             _(
                 b'output patches for changes (provide the names of the shelved '
                 b'changes as positional arguments)'
             ),
         ),
         (b'i', b'interactive', None, _(b'interactive mode')),
         (
             b'',
             b'stat',
             None,
             _(
                 b'output diffstat-style summary of changes (provide the names of '
                 b'the shelved changes as positional arguments)'
             ),
         ),
     ]
     + cmdutil.walkopts,
     _(b'hg shelve [OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def shelve(ui, repo, *pats, **opts):
     """save and set aside changes from the working directory
 
     Shelving takes files that "hg status" reports as not clean, saves
     the modifications to a bundle (a shelved change), and reverts the
     files so that their state in the working directory becomes clean.
 
     To restore these changes to the working directory, using "hg
     unshelve"; this will work even if you switch to a different
     commit.
 
     When no files are specified, "hg shelve" saves all not-clean
     files. If specific files or directories are named, only changes to
     those files are shelved.
 
     In bare shelve (when no files are specified, without interactive,
     include and exclude option), shelving remembers information if the
     working directory was on newly created branch, in other words working
     directory was on different branch than its first parent. In this
     situation unshelving restores branch information to the working directory.
 
     Each shelved change has a name that makes it easier to find later.
     The name of a shelved change defaults to being based on the active
     bookmark, or if there is no active bookmark, the current named
     branch.  To specify a different name, use ``--name``.
 
     To see a list of existing shelved changes, use the ``--list``
     option. For each shelved change, this will print its name, age,
     and description; use ``--patch`` or ``--stat`` for more details.
 
     To delete specific shelved changes, use ``--delete``. To delete
     all shelved changes, use ``--cleanup``.
     """
     opts = pycompat.byteskwargs(opts)
     allowables = [
         (b'addremove', {b'create'}),  # 'create' is pseudo action
         (b'unknown', {b'create'}),
         (b'cleanup', {b'cleanup'}),
         #       ('date', {'create'}), # ignored for passing '--date "0 0"' in tests
         (b'delete', {b'delete'}),
         (b'edit', {b'create'}),
         (b'keep', {b'create'}),
         (b'list', {b'list'}),
         (b'message', {b'create'}),
         (b'name', {b'create'}),
         (b'patch', {b'patch', b'list'}),
         (b'stat', {b'stat', b'list'}),
     ]
 
     def checkopt(opt):
         if opts.get(opt):
             for i, allowable in allowables:
                 if opts[i] and opt not in allowable:
                     raise error.InputError(
                         _(
                             b"options '--%s' and '--%s' may not be "
                             b"used together"
                         )
                         % (opt, i)
                     )
             return True
 
     if checkopt(b'cleanup'):
         if pats:
             raise error.InputError(
                 _(b"cannot specify names when using '--cleanup'")
             )
         return shelvemod.cleanupcmd(ui, repo)
     elif checkopt(b'delete'):
         return shelvemod.deletecmd(ui, repo, pats)
     elif checkopt(b'list'):
         return shelvemod.listcmd(ui, repo, pats, opts)
     elif checkopt(b'patch') or checkopt(b'stat'):
         return shelvemod.patchcmds(ui, repo, pats, opts)
     else:
         return shelvemod.createcmd(ui, repo, pats, opts)
 
 
 _NOTTERSE = b'nothing'
 
 
 @command(
     b'status|st',
     [
         (b'A', b'all', None, _(b'show status of all files')),
         (b'm', b'modified', None, _(b'show only modified files')),
         (b'a', b'added', None, _(b'show only added files')),
         (b'r', b'removed', None, _(b'show only removed files')),
         (b'd', b'deleted', None, _(b'show only missing files')),
         (b'c', b'clean', None, _(b'show only files without changes')),
         (b'u', b'unknown', None, _(b'show only unknown (not tracked) files')),
         (b'i', b'ignored', None, _(b'show only ignored files')),
         (b'n', b'no-status', None, _(b'hide status prefix')),
         (b't', b'terse', _NOTTERSE, _(b'show the terse output (EXPERIMENTAL)')),
         (
             b'C',
             b'copies',
             None,
             _(b'show source of copied files (DEFAULT: ui.statuscopies)'),
         ),
         (
             b'0',
             b'print0',
             None,
             _(b'end filenames with NUL, for use with xargs'),
         ),
         (b'', b'rev', [], _(b'show difference from revision'), _(b'REV')),
         (
             b'',
             b'change',
             b'',
             _(b'list the changed files of a revision'),
             _(b'REV'),
         ),
     ]
     + walkopts
     + subrepoopts
     + formatteropts,
     _(b'[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
     inferrepo=True,
     intents={INTENT_READONLY},
 )
 def status(ui, repo, *pats, **opts):
     """show changed files in the working directory
 
     Show status of files in the repository. If names are given, only
     files that match are shown. Files that are clean or ignored or
     the source of a copy/move operation, are not listed unless
     -c/--clean, -i/--ignored, -C/--copies or -A/--all are given.
     Unless options described with "show only ..." are given, the
     options -mardu are used.
 
     Option -q/--quiet hides untracked (unknown and ignored) files
     unless explicitly requested with -u/--unknown or -i/--ignored.
 
     .. note::
 
        :hg:`status` may appear to disagree with diff if permissions have
        changed or a merge has occurred. The standard diff format does
        not report permission changes and diff only reports changes
        relative to one merge parent.
 
     If one revision is given, it is used as the base revision.
     If two revisions are given, the differences between them are
     shown. The --change option can also be used as a shortcut to list
     the changed files of a revision from its first parent.
 
     The codes used to show the status of files are::
 
       M = modified
       A = added
       R = removed
       C = clean
       ! = missing (deleted by non-hg command, but still tracked)
       ? = not tracked
       I = ignored
         = origin of the previous file (with --copies)
 
     .. container:: verbose
 
       The -t/--terse option abbreviates the output by showing only the directory
       name if all the files in it share the same status. The option takes an
       argument indicating the statuses to abbreviate: 'm' for 'modified', 'a'
       for 'added', 'r' for 'removed', 'd' for 'deleted', 'u' for 'unknown', 'i'
       for 'ignored' and 'c' for clean.
 
       It abbreviates only those statuses which are passed. Note that clean and
       ignored files are not displayed with '--terse ic' unless the -c/--clean
       and -i/--ignored options are also used.
 
       The -v/--verbose option shows information when the repository is in an
       unfinished merge, shelve, rebase state etc. You can have this behavior
       turned on by default by enabling the ``commands.status.verbose`` option.
 
       You can skip displaying some of these states by setting
       ``commands.status.skipstates`` to one or more of: 'bisect', 'graft',
       'histedit', 'merge', 'rebase', or 'unshelve'.
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :path:    String. Repository-absolute path of the file.
       :source:  String. Repository-absolute path of the file originated from.
                 Available if ``--copies`` is specified.
       :status:  String. Character denoting file's status.
 
       Examples:
 
       - show changes in the working directory relative to a
         changeset::
 
           hg status --rev 9353
 
       - show changes in the working directory relative to the
         current directory (see :hg:`help patterns` for more information)::
 
           hg status re:
 
       - show all changes including copies in an existing changeset::
 
           hg status --copies --change 9353
 
       - get a NUL separated list of added files, suitable for xargs::
 
           hg status -an0
 
       - show more information about the repository status, abbreviating
         added, removed, modified, deleted, and untracked paths::
 
           hg status -v -t mardu
 
     Returns 0 on success.
 
     """
 
     cmdutil.check_at_most_one_arg(opts, 'rev', 'change')
     opts = pycompat.byteskwargs(opts)
     revs = opts.get(b'rev')
     change = opts.get(b'change')
     terse = opts.get(b'terse')
     if terse is _NOTTERSE:
         if revs:
             terse = b''
         else:
             terse = ui.config(b'commands', b'status.terse')
 
     if revs and terse:
         msg = _(b'cannot use --terse with --rev')
         raise error.InputError(msg)
     elif change:
         repo = scmutil.unhidehashlikerevs(repo, [change], b'nowarn')
         ctx2 = logcmdutil.revsingle(repo, change, None)
         ctx1 = ctx2.p1()
     else:
         repo = scmutil.unhidehashlikerevs(repo, revs, b'nowarn')
         ctx1, ctx2 = logcmdutil.revpair(repo, revs)
 
     forcerelativevalue = None
     if ui.hasconfig(b'commands', b'status.relative'):
         forcerelativevalue = ui.configbool(b'commands', b'status.relative')
     uipathfn = scmutil.getuipathfn(
         repo,
         legacyrelativevalue=bool(pats),
         forcerelativevalue=forcerelativevalue,
     )
 
     if opts.get(b'print0'):
         end = b'\0'
     else:
         end = b'\n'
     states = b'modified added removed deleted unknown ignored clean'.split()
     show = [k for k in states if opts.get(k)]
     if opts.get(b'all'):
         show += ui.quiet and (states[:4] + [b'clean']) or states
 
     if not show:
         if ui.quiet:
             show = states[:4]
         else:
             show = states[:5]
 
     m = scmutil.match(ctx2, pats, opts)
     if terse:
         # we need to compute clean and unknown to terse
         stat = repo.status(
             ctx1.node(),
             ctx2.node(),
             m,
             b'ignored' in show or b'i' in terse,
             clean=True,
             unknown=True,
             listsubrepos=opts.get(b'subrepos'),
         )
 
         stat = cmdutil.tersedir(stat, terse)
     else:
         stat = repo.status(
             ctx1.node(),
             ctx2.node(),
             m,
             b'ignored' in show,
             b'clean' in show,
             b'unknown' in show,
             opts.get(b'subrepos'),
         )
 
     changestates = zip(
         states,
         pycompat.iterbytestr(b'MAR!?IC'),
         [getattr(stat, s.decode('utf8')) for s in states],
     )
 
     copy = {}
     if (
         opts.get(b'all')
         or opts.get(b'copies')
         or ui.configbool(b'ui', b'statuscopies')
     ) and not opts.get(b'no_status'):
         copy = copies.pathcopies(ctx1, ctx2, m)
 
     morestatus = None
     if (
         (ui.verbose or ui.configbool(b'commands', b'status.verbose'))
         and not ui.plain()
         and not opts.get(b'print0')
     ):
         morestatus = cmdutil.readmorestatus(repo)
 
     ui.pager(b'status')
     fm = ui.formatter(b'status', opts)
     fmt = b'%s' + end
     showchar = not opts.get(b'no_status')
 
     for state, char, files in changestates:
         if state in show:
             label = b'status.' + state
             for f in files:
                 fm.startitem()
                 fm.context(ctx=ctx2)
                 fm.data(itemtype=b'file', path=f)
                 fm.condwrite(showchar, b'status', b'%s ', char, label=label)
                 fm.plain(fmt % uipathfn(f), label=label)
                 if f in copy:
                     fm.data(source=copy[f])
                     fm.plain(
                         (b'  %s' + end) % uipathfn(copy[f]),
                         label=b'status.copied',
                     )
                 if morestatus:
                     morestatus.formatfile(f, fm)
 
     if morestatus:
         morestatus.formatfooter(fm)
     fm.end()
 
 
 @command(
     b'summary|sum',
     [(b'', b'remote', None, _(b'check for push and pull'))],
     b'[--remote]',
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
     intents={INTENT_READONLY},
 )
 def summary(ui, repo, **opts):
     """summarize working directory state
 
     This generates a brief summary of the working directory state,
     including parents, branch, commit status, phase and available updates.
 
     With the --remote option, this will check the default paths for
     incoming and outgoing changes. This can be time-consuming.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager(b'summary')
     ctx = repo[None]
     parents = ctx.parents()
     pnode = parents[0].node()
     marks = []
 
     try:
         ms = mergestatemod.mergestate.read(repo)
     except error.UnsupportedMergeRecords as e:
         s = b' '.join(e.recordtypes)
         ui.warn(
             _(b'warning: merge state has unsupported record types: %s\n') % s
         )
         unresolved = []
     else:
         unresolved = list(ms.unresolved())
 
     for p in parents:
         # label with log.changeset (instead of log.parent) since this
         # shows a working directory parent *changeset*:
         # i18n: column positioning for "hg summary"
         ui.write(
             _(b'parent: %d:%s ') % (p.rev(), p),
             label=logcmdutil.changesetlabels(p),
         )
         ui.write(b' '.join(p.tags()), label=b'log.tag')
         if p.bookmarks():
             marks.extend(p.bookmarks())
         if p.rev() == -1:
             if not len(repo):
                 ui.write(_(b' (empty repository)'))
             else:
                 ui.write(_(b' (no revision checked out)'))
         if p.obsolete():
             ui.write(_(b' (obsolete)'))
         if p.isunstable():
             instabilities = (
                 ui.label(instability, b'trouble.%s' % instability)
                 for instability in p.instabilities()
             )
             ui.write(b' (' + b', '.join(instabilities) + b')')
         ui.write(b'\n')
         if p.description():
             ui.status(
                 b' ' + p.description().splitlines()[0].strip() + b'\n',
                 label=b'log.summary',
             )
 
     branch = ctx.branch()
     bheads = repo.branchheads(branch)
     # i18n: column positioning for "hg summary"
     m = _(b'branch: %s\n') % branch
     if branch != b'default':
         ui.write(m, label=b'log.branch')
     else:
         ui.status(m, label=b'log.branch')
 
     if marks:
         active = repo._activebookmark
         # i18n: column positioning for "hg summary"
         ui.write(_(b'bookmarks:'), label=b'log.bookmark')
         if active is not None:
             if active in marks:
                 ui.write(b' *' + active, label=bookmarks.activebookmarklabel)
                 marks.remove(active)
             else:
                 ui.write(b' [%s]' % active, label=bookmarks.activebookmarklabel)
         for m in marks:
             ui.write(b' ' + m, label=b'log.bookmark')
         ui.write(b'\n', label=b'log.bookmark')
 
     status = repo.status(unknown=True)
 
     c = repo.dirstate.copies()
     copied, renamed = [], []
     for d, s in pycompat.iteritems(c):
         if s in status.removed:
             status.removed.remove(s)
             renamed.append(d)
         else:
             copied.append(d)
         if d in status.added:
             status.added.remove(d)
 
     subs = [s for s in ctx.substate if ctx.sub(s).dirty()]
 
     labels = [
         (ui.label(_(b'%d modified'), b'status.modified'), status.modified),
         (ui.label(_(b'%d added'), b'status.added'), status.added),
         (ui.label(_(b'%d removed'), b'status.removed'), status.removed),
         (ui.label(_(b'%d renamed'), b'status.copied'), renamed),
         (ui.label(_(b'%d copied'), b'status.copied'), copied),
         (ui.label(_(b'%d deleted'), b'status.deleted'), status.deleted),
         (ui.label(_(b'%d unknown'), b'status.unknown'), status.unknown),
         (ui.label(_(b'%d unresolved'), b'resolve.unresolved'), unresolved),
         (ui.label(_(b'%d subrepos'), b'status.modified'), subs),
     ]
     t = []
     for l, s in labels:
         if s:
             t.append(l % len(s))
 
     t = b', '.join(t)
     cleanworkdir = False
 
     if repo.vfs.exists(b'graftstate'):
         t += _(b' (graft in progress)')
     if repo.vfs.exists(b'updatestate'):
         t += _(b' (interrupted update)')
     elif len(parents) > 1:
         t += _(b' (merge)')
     elif branch != parents[0].branch():
         t += _(b' (new branch)')
     elif parents[0].closesbranch() and pnode in repo.branchheads(
         branch, closed=True
     ):
         t += _(b' (head closed)')
     elif not (
         status.modified
         or status.added
         or status.removed
         or renamed
         or copied
         or subs
     ):
         t += _(b' (clean)')
         cleanworkdir = True
     elif pnode not in bheads:
         t += _(b' (new branch head)')
 
     if parents:
         pendingphase = max(p.phase() for p in parents)
     else:
         pendingphase = phases.public
 
     if pendingphase > phases.newcommitphase(ui):
         t += b' (%s)' % phases.phasenames[pendingphase]
 
     if cleanworkdir:
         # i18n: column positioning for "hg summary"
         ui.status(_(b'commit: %s\n') % t.strip())
     else:
         # i18n: column positioning for "hg summary"
         ui.write(_(b'commit: %s\n') % t.strip())
 
     # all ancestors of branch heads - all ancestors of parent = new csets
     new = len(
         repo.changelog.findmissing([pctx.node() for pctx in parents], bheads)
     )
 
     if new == 0:
         # i18n: column positioning for "hg summary"
         ui.status(_(b'update: (current)\n'))
     elif pnode not in bheads:
         # i18n: column positioning for "hg summary"
         ui.write(_(b'update: %d new changesets (update)\n') % new)
     else:
         # i18n: column positioning for "hg summary"
         ui.write(
             _(b'update: %d new changesets, %d branch heads (merge)\n')
             % (new, len(bheads))
         )
 
     t = []
     draft = len(repo.revs(b'draft()'))
     if draft:
         t.append(_(b'%d draft') % draft)
     secret = len(repo.revs(b'secret()'))
     if secret:
         t.append(_(b'%d secret') % secret)
 
     if draft or secret:
         ui.status(_(b'phases: %s\n') % b', '.join(t))
 
     if obsolete.isenabled(repo, obsolete.createmarkersopt):
         for trouble in (b"orphan", b"contentdivergent", b"phasedivergent"):
             numtrouble = len(repo.revs(trouble + b"()"))
             # We write all the possibilities to ease translation
             troublemsg = {
                 b"orphan": _(b"orphan: %d changesets"),
                 b"contentdivergent": _(b"content-divergent: %d changesets"),
                 b"phasedivergent": _(b"phase-divergent: %d changesets"),
             }
             if numtrouble > 0:
                 ui.status(troublemsg[trouble] % numtrouble + b"\n")
 
     cmdutil.summaryhooks(ui, repo)
 
     if opts.get(b'remote'):
         needsincoming, needsoutgoing = True, True
     else:
         needsincoming, needsoutgoing = False, False
         for i, o in cmdutil.summaryremotehooks(ui, repo, opts, None):
             if i:
                 needsincoming = True
             if o:
                 needsoutgoing = True
         if not needsincoming and not needsoutgoing:
             return
 
     def getincoming():
         # XXX We should actually skip this if no default is specified, instead
         # of passing "default" which will resolve as "./default/" if no default
         # path is defined.
         source, branches = urlutil.get_unique_pull_path(
             b'summary', repo, ui, b'default'
         )
         sbranch = branches[0]
         try:
             other = hg.peer(repo, {}, source)
         except error.RepoError:
             if opts.get(b'remote'):
                 raise
             return source, sbranch, None, None, None
         revs, checkout = hg.addbranchrevs(repo, other, branches, None)
         if revs:
             revs = [other.lookup(rev) for rev in revs]
         ui.debug(b'comparing with %s\n' % urlutil.hidepassword(source))
         with repo.ui.silent():
             commoninc = discovery.findcommonincoming(repo, other, heads=revs)
         return source, sbranch, other, commoninc, commoninc[1]
 
     if needsincoming:
         source, sbranch, sother, commoninc, incoming = getincoming()
     else:
         source = sbranch = sother = commoninc = incoming = None
 
     def getoutgoing():
         # XXX We should actually skip this if no default is specified, instead
         # of passing "default" which will resolve as "./default/" if no default
         # path is defined.
         d = None
         if b'default-push' in ui.paths:
             d = b'default-push'
         elif b'default' in ui.paths:
             d = b'default'
         if d is not None:
             path = urlutil.get_unique_push_path(b'summary', repo, ui, d)
             dest = path.pushloc or path.loc
             dbranch = path.branch
         else:
             dest = b'default'
             dbranch = None
         revs, checkout = hg.addbranchrevs(repo, repo, (dbranch, []), None)
         if source != dest:
             try:
                 dother = hg.peer(repo, {}, dest)
             except error.RepoError:
                 if opts.get(b'remote'):
                     raise
                 return dest, dbranch, None, None
             ui.debug(b'comparing with %s\n' % urlutil.hidepassword(dest))
         elif sother is None:
             # there is no explicit destination peer, but source one is invalid
             return dest, dbranch, None, None
         else:
             dother = sother
         if source != dest or (sbranch is not None and sbranch != dbranch):
             common = None
         else:
             common = commoninc
         if revs:
             revs = [repo.lookup(rev) for rev in revs]
         with repo.ui.silent():
             outgoing = discovery.findcommonoutgoing(
                 repo, dother, onlyheads=revs, commoninc=common
             )
         return dest, dbranch, dother, outgoing
 
     if needsoutgoing:
         dest, dbranch, dother, outgoing = getoutgoing()
     else:
         dest = dbranch = dother = outgoing = None
 
     if opts.get(b'remote'):
         # Help pytype.  --remote sets both `needsincoming` and `needsoutgoing`.
         # The former always sets `sother` (or raises an exception if it can't);
         # the latter always sets `outgoing`.
         assert sother is not None
         assert outgoing is not None
 
         t = []
         if incoming:
             t.append(_(b'1 or more incoming'))
         o = outgoing.missing
         if o:
             t.append(_(b'%d outgoing') % len(o))
         other = dother or sother
         if b'bookmarks' in other.listkeys(b'namespaces'):
             counts = bookmarks.summary(repo, other)
             if counts[0] > 0:
                 t.append(_(b'%d incoming bookmarks') % counts[0])
             if counts[1] > 0:
                 t.append(_(b'%d outgoing bookmarks') % counts[1])
 
         if t:
             # i18n: column positioning for "hg summary"
             ui.write(_(b'remote: %s\n') % (b', '.join(t)))
         else:
             # i18n: column positioning for "hg summary"
             ui.status(_(b'remote: (synced)\n'))
 
     cmdutil.summaryremotehooks(
         ui,
         repo,
         opts,
         (
             (source, sbranch, sother, commoninc),
             (dest, dbranch, dother, outgoing),
         ),
     )
 
 
 @command(
     b'tag',
     [
         (b'f', b'force', None, _(b'force tag')),
         (b'l', b'local', None, _(b'make the tag local')),
         (b'r', b'rev', b'', _(b'revision to tag'), _(b'REV')),
         (b'', b'remove', None, _(b'remove a tag')),
         # -l/--local is already there, commitopts cannot be used
         (b'e', b'edit', None, _(b'invoke editor on commit messages')),
         (b'm', b'message', b'', _(b'use text as commit message'), _(b'TEXT')),
     ]
     + commitopts2,
     _(b'[-f] [-l] [-m TEXT] [-d DATE] [-u USER] [-r REV] NAME...'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
 )
 def tag(ui, repo, name1, *names, **opts):
     """add one or more tags for the current or given revision
 
     Name a particular revision using <name>.
 
     Tags are used to name particular revisions of the repository and are
     very useful to compare different revisions, to go back to significant
     earlier versions or to mark branch points as releases, etc. Changing
     an existing tag is normally disallowed; use -f/--force to override.
 
     If no revision is given, the parent of the working directory is
     used.
 
     To facilitate version control, distribution, and merging of tags,
     they are stored as a file named ".hgtags" which is managed similarly
     to other project files and can be hand-edited if necessary. This
     also means that tagging creates a new commit. The file
     ".hg/localtags" is used for local tags (not shared among
     repositories).
 
     Tag commits are usually made at the head of a branch. If the parent
     of the working directory is not a branch head, :hg:`tag` aborts; use
     -f/--force to force the tag commit to be based on a non-head
     changeset.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Since tag names have priority over branch names during revision
     lookup, using an existing branch name as a tag name is discouraged.
 
     Returns 0 on success.
     """
     cmdutil.check_incompatible_arguments(opts, 'remove', ['rev'])
     opts = pycompat.byteskwargs(opts)
     with repo.wlock(), repo.lock():
         rev_ = b"."
         names = [t.strip() for t in (name1,) + names]
         if len(names) != len(set(names)):
             raise error.InputError(_(b'tag names must be unique'))
         for n in names:
             scmutil.checknewlabel(repo, n, b'tag')
             if not n:
                 raise error.InputError(
                     _(b'tag names cannot consist entirely of whitespace')
                 )
         if opts.get(b'rev'):
             rev_ = opts[b'rev']
         message = opts.get(b'message')
         if opts.get(b'remove'):
             if opts.get(b'local'):
                 expectedtype = b'local'
             else:
                 expectedtype = b'global'
 
             for n in names:
                 if repo.tagtype(n) == b'global':
                     alltags = tagsmod.findglobaltags(ui, repo)
                     if alltags[n][0] == repo.nullid:
                         raise error.InputError(
                             _(b"tag '%s' is already removed") % n
                         )
                 if not repo.tagtype(n):
                     raise error.InputError(_(b"tag '%s' does not exist") % n)
                 if repo.tagtype(n) != expectedtype:
                     if expectedtype == b'global':
                         raise error.InputError(
                             _(b"tag '%s' is not a global tag") % n
                         )
                     else:
                         raise error.InputError(
                             _(b"tag '%s' is not a local tag") % n
                         )
             rev_ = b'null'
             if not message:
                 # we don't translate commit messages
                 message = b'Removed tag %s' % b', '.join(names)
         elif not opts.get(b'force'):
             for n in names:
                 if n in repo.tags():
                     raise error.InputError(
                         _(b"tag '%s' already exists (use -f to force)") % n
                     )
         if not opts.get(b'local'):
             p1, p2 = repo.dirstate.parents()
             if p2 != repo.nullid:
                 raise error.StateError(_(b'uncommitted merge'))
             bheads = repo.branchheads()
             if not opts.get(b'force') and bheads and p1 not in bheads:
                 raise error.InputError(
                     _(
                         b'working directory is not at a branch head '
                         b'(use -f to force)'
                     )
                 )
         node = logcmdutil.revsingle(repo, rev_).node()
 
         if not message:
             # we don't translate commit messages
             message = b'Added tag %s for changeset %s' % (
                 b', '.join(names),
                 short(node),
             )
 
         date = opts.get(b'date')
         if date:
             date = dateutil.parsedate(date)
 
         if opts.get(b'remove'):
             editform = b'tag.remove'
         else:
             editform = b'tag.add'
         editor = cmdutil.getcommiteditor(
             editform=editform, **pycompat.strkwargs(opts)
         )
 
         # don't allow tagging the null rev
         if (
             not opts.get(b'remove')
             and logcmdutil.revsingle(repo, rev_).rev() == nullrev
         ):
             raise error.InputError(_(b"cannot tag null revision"))
 
         tagsmod.tag(
             repo,
             names,
             node,
             message,
             opts.get(b'local'),
             opts.get(b'user'),
             date,
             editor=editor,
         )
 
 
 @command(
     b'tags',
     formatteropts,
     b'',
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
     intents={INTENT_READONLY},
 )
 def tags(ui, repo, **opts):
     """list repository tags
 
     This lists both regular and local tags. When the -v/--verbose
     switch is used, a third column "local" is printed for local tags.
     When the -q/--quiet switch is used, only the tag name is printed.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions such as ``{tag}``. See also
       :hg:`help templates`.
 
       :type:    String. ``local`` for local tags.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager(b'tags')
     fm = ui.formatter(b'tags', opts)
     hexfunc = fm.hexfunc
 
     for t, n in reversed(repo.tagslist()):
         hn = hexfunc(n)
         label = b'tags.normal'
         tagtype = repo.tagtype(t)
         if not tagtype or tagtype == b'global':
             tagtype = b''
         else:
             label = b'tags.' + tagtype
 
         fm.startitem()
         fm.context(repo=repo)
         fm.write(b'tag', b'%s', t, label=label)
         fmt = b" " * (30 - encoding.colwidth(t)) + b' %5d:%s'
         fm.condwrite(
             not ui.quiet,
             b'rev node',
             fmt,
             repo.changelog.rev(n),
             hn,
             label=label,
         )
         fm.condwrite(
             ui.verbose and tagtype, b'type', b' %s', tagtype, label=label
         )
         fm.plain(b'\n')
     fm.end()
 
 
 @command(
     b'tip',
     [
         (b'p', b'patch', None, _(b'show patch')),
         (b'g', b'git', None, _(b'use git extended diff format')),
     ]
     + templateopts,
     _(b'[-p] [-g]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
 )
 def tip(ui, repo, **opts):
     """show the tip revision (DEPRECATED)
 
     The tip revision (usually just called the tip) is the changeset
     most recently added to the repository (and therefore the most
     recently changed head).
 
     If you have just made a commit, that commit will be the tip. If
     you have just pulled changes from another repository, the tip of
     that repository becomes the current tip. The "tip" tag is special
     and cannot be renamed or assigned to a different changeset.
 
     This command is deprecated, please use :hg:`heads` instead.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
     displayer.show(repo[b'tip'])
     displayer.close()
 
 
 @command(
     b'unbundle',
     [
         (
             b'u',
             b'update',
             None,
             _(b'update to new branch head if changesets were unbundled'),
         )
     ],
     _(b'[-u] FILE...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def unbundle(ui, repo, fname1, *fnames, **opts):
     """apply one or more bundle files
 
     Apply one or more bundle files generated by :hg:`bundle`.
 
     Returns 0 on success, 1 if an update has unresolved files.
     """
     fnames = (fname1,) + fnames
 
     with repo.lock():
         for fname in fnames:
             f = hg.openpath(ui, fname)
             gen = exchange.readbundle(ui, f, fname)
             if isinstance(gen, streamclone.streamcloneapplier):
                 raise error.InputError(
                     _(
                         b'packed bundles cannot be applied with '
                         b'"hg unbundle"'
                     ),
                     hint=_(b'use "hg debugapplystreamclonebundle"'),
                 )
             url = b'bundle:' + fname
             try:
                 txnname = b'unbundle'
                 if not isinstance(gen, bundle2.unbundle20):
                     txnname = b'unbundle\n%s' % urlutil.hidepassword(url)
                 with repo.transaction(txnname) as tr:
                     op = bundle2.applybundle(
                         repo, gen, tr, source=b'unbundle', url=url
                     )
             except error.BundleUnknownFeatureError as exc:
                 raise error.Abort(
                     _(b'%s: unknown bundle feature, %s') % (fname, exc),
                     hint=_(
                         b"see https://mercurial-scm.org/"
                         b"wiki/BundleFeature for more "
                         b"information"
                     ),
                 )
             modheads = bundle2.combinechangegroupresults(op)
 
     if postincoming(ui, repo, modheads, opts.get('update'), None, None):
         return 1
     else:
         return 0
 
 
 @command(
     b'unshelve',
     [
         (b'a', b'abort', None, _(b'abort an incomplete unshelve operation')),
         (
             b'c',
             b'continue',
             None,
             _(b'continue an incomplete unshelve operation'),
         ),
         (b'i', b'interactive', None, _(b'use interactive mode (EXPERIMENTAL)')),
         (b'k', b'keep', None, _(b'keep shelve after unshelving')),
         (
             b'n',
             b'name',
             b'',
             _(b'restore shelved change with given name'),
             _(b'NAME'),
         ),
         (b't', b'tool', b'', _(b'specify merge tool')),
         (
             b'',
             b'date',
             b'',
             _(b'set date for temporary commits (DEPRECATED)'),
             _(b'DATE'),
         ),
     ],
     _(b'hg unshelve [OPTION]... [[-n] SHELVED]'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
 )
 def unshelve(ui, repo, *shelved, **opts):
     """restore a shelved change to the working directory
 
     This command accepts an optional name of a shelved change to
     restore. If none is given, the most recent shelved change is used.
 
     If a shelved change is applied successfully, the bundle that
     contains the shelved changes is moved to a backup location
     (.hg/shelve-backup).
 
     Since you can restore a shelved change on top of an arbitrary
     commit, it is possible that unshelving will result in a conflict
     between your changes and the commits you are unshelving onto. If
     this occurs, you must resolve the conflict, then use
     ``--continue`` to complete the unshelve operation. (The bundle
     will not be moved until you successfully complete the unshelve.)
 
     (Alternatively, you can use ``--abort`` to abandon an unshelve
     that causes a conflict. This reverts the unshelved changes, and
     leaves the bundle in place.)
 
     If bare shelved change (without interactive, include and exclude
     option) was done on newly created branch it would restore branch
     information to the working directory.
 
     After a successful unshelve, the shelved changes are stored in a
     backup directory. Only the N most recent backups are kept. N
     defaults to 10 but can be overridden using the ``shelve.maxbackups``
     configuration option.
 
     .. container:: verbose
 
        Timestamp in seconds is used to decide order of backups. More
        than ``maxbackups`` backups are kept, if same timestamp
        prevents from deciding exact order of them, for safety.
 
        Selected changes can be unshelved with ``--interactive`` flag.
        The working directory is updated with the selected changes, and
        only the unselected changes remain shelved.
        Note: The whole shelve is applied to working directory first before
        running interactively. So, this will bring up all the conflicts between
        working directory and the shelve, irrespective of which changes will be
        unshelved.
     """
     with repo.wlock():
         return shelvemod.unshelvecmd(ui, repo, *shelved, **opts)
 
 
 statemod.addunfinished(
     b'unshelve',
     fname=b'shelvedstate',
     continueflag=True,
     abortfunc=shelvemod.hgabortunshelve,
     continuefunc=shelvemod.hgcontinueunshelve,
     cmdmsg=_(b'unshelve already in progress'),
 )
 
 
 @command(
     b'update|up|checkout|co',
     [
         (b'C', b'clean', None, _(b'discard uncommitted changes (no backup)')),
         (b'c', b'check', None, _(b'require clean working directory')),
         (b'm', b'merge', None, _(b'merge uncommitted changes')),
         (b'd', b'date', b'', _(b'tipmost revision matching date'), _(b'DATE')),
         (b'r', b'rev', b'', _(b'revision'), _(b'REV')),
     ]
     + mergetoolopts,
     _(b'[-C|-c|-m] [-d DATE] [[-r] REV]'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
 )
 def update(ui, repo, node=None, **opts):
     """update working directory (or switch revisions)
 
     Update the repository's working directory to the specified
     changeset. If no changeset is specified, update to the tip of the
     current named branch and move the active bookmark (see :hg:`help
     bookmarks`).
 
     Update sets the working directory's parent revision to the specified
     changeset (see :hg:`help parents`).
 
     If the changeset is not a descendant or ancestor of the working
     directory's parent and there are uncommitted changes, the update is
     aborted. With the -c/--check option, the working directory is checked
     for uncommitted changes; if none are found, the working directory is
     updated to the specified changeset.
 
     .. container:: verbose
 
       The -C/--clean, -c/--check, and -m/--merge options control what
       happens if the working directory contains uncommitted changes.
       At most of one of them can be specified.
 
       1. If no option is specified, and if
          the requested changeset is an ancestor or descendant of
          the working directory's parent, the uncommitted changes
          are merged into the requested changeset and the merged
          result is left uncommitted. If the requested changeset is
          not an ancestor or descendant (that is, it is on another
          branch), the update is aborted and the uncommitted changes
          are preserved.
 
       2. With the -m/--merge option, the update is allowed even if the
          requested changeset is not an ancestor or descendant of
          the working directory's parent.
 
       3. With the -c/--check option, the update is aborted and the
          uncommitted changes are preserved.
 
       4. With the -C/--clean option, uncommitted changes are discarded and
          the working directory is updated to the requested changeset.
 
     To cancel an uncommitted merge (and lose your changes), use
     :hg:`merge --abort`.
 
     Use null as the changeset to remove the working directory (like
     :hg:`clone -U`).
 
     If you want to revert just one file to an older revision, use
     :hg:`revert [-r REV] NAME`.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success, 1 if there are unresolved files.
     """
     cmdutil.check_at_most_one_arg(opts, 'clean', 'check', 'merge')
     rev = opts.get('rev')
     date = opts.get('date')
     clean = opts.get('clean')
     check = opts.get('check')
     merge = opts.get('merge')
     if rev and node:
         raise error.InputError(_(b"please specify just one revision"))
 
     if ui.configbool(b'commands', b'update.requiredest'):
         if not node and not rev and not date:
             raise error.InputError(
                 _(b'you must specify a destination'),
                 hint=_(b'for example: hg update ".::"'),
             )
 
     if rev is None or rev == b'':
         rev = node
 
     if date and rev is not None:
         raise error.InputError(_(b"you can't specify a revision and a date"))
 
     updatecheck = None
     if check or merge is not None and not merge:
         updatecheck = b'abort'
     elif merge or check is not None and not check:
         updatecheck = b'none'
 
     with repo.wlock():
         cmdutil.clearunfinished(repo)
         if date:
             rev = cmdutil.finddate(ui, repo, date)
 
         # if we defined a bookmark, we have to remember the original name
         brev = rev
         if rev:
             repo = scmutil.unhidehashlikerevs(repo, [rev], b'nowarn')
         ctx = logcmdutil.revsingle(repo, rev, default=None)
         rev = ctx.rev()
         hidden = ctx.hidden()
         overrides = {(b'ui', b'forcemerge'): opts.get('tool', b'')}
         with ui.configoverride(overrides, b'update'):
             ret = hg.updatetotally(
                 ui, repo, rev, brev, clean=clean, updatecheck=updatecheck
             )
         if hidden:
             ctxstr = ctx.hex()[:12]
             ui.warn(_(b"updated to hidden changeset %s\n") % ctxstr)
 
             if ctx.obsolete():
                 obsfatemsg = obsutil._getfilteredreason(repo, ctxstr, ctx)
                 ui.warn(b"(%s)\n" % obsfatemsg)
         return ret
 
 
 @command(
     b'verify',
     [(b'', b'full', False, b'perform more checks (EXPERIMENTAL)')],
     helpcategory=command.CATEGORY_MAINTENANCE,
 )
 def verify(ui, repo, **opts):
     """verify the integrity of the repository
 
     Verify the integrity of the current repository.
 
     This will perform an extensive check of the repository's
     integrity, validating the hashes and checksums of each entry in
     the changelog, manifest, and tracked files, as well as the
     integrity of their crosslinks and indices.
 
     Please see https://mercurial-scm.org/wiki/RepositoryCorruption
     for more information about recovery from corruption of the
     repository.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     opts = pycompat.byteskwargs(opts)
 
     level = None
     if opts[b'full']:
         level = verifymod.VERIFY_FULL
     return hg.verify(repo, level)
 
 
 @command(
     b'version',
     [] + formatteropts,
     helpcategory=command.CATEGORY_HELP,
     norepo=True,
     intents={INTENT_READONLY},
 )
 def version_(ui, **opts):
     """output version and copyright information
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported. See also :hg:`help templates`.
 
       :extensions: List of extensions.
       :ver:     String. Version number.
 
       And each entry of ``{extensions}`` provides the following sub-keywords
       in addition to ``{ver}``.
 
       :bundled: Boolean. True if included in the release.
       :name:    String. Extension name.
     """
     opts = pycompat.byteskwargs(opts)
     if ui.verbose:
         ui.pager(b'version')
     fm = ui.formatter(b"version", opts)
     fm.startitem()
     fm.write(
         b"ver", _(b"Mercurial Distributed SCM (version %s)\n"), util.version()
     )
     license = _(
         b"(see https://mercurial-scm.org for more information)\n"
         b"\nCopyright (C) 2005-2021 Olivia Mackall and others\n"
         b"This is free software; see the source for copying conditions. "
         b"There is NO\nwarranty; "
         b"not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
     )
     if not ui.quiet:
         fm.plain(license)
 
     if ui.verbose:
         fm.plain(_(b"\nEnabled extensions:\n\n"))
     # format names and versions into columns
     names = []
     vers = []
     isinternals = []
     for name, module in sorted(extensions.extensions()):
         names.append(name)
         vers.append(extensions.moduleversion(module) or None)
         isinternals.append(extensions.ismoduleinternal(module))
     fn = fm.nested(b"extensions", tmpl=b'{name}\n')
     if names:
         namefmt = b"  %%-%ds  " % max(len(n) for n in names)
         places = [_(b"external"), _(b"internal")]
         for n, v, p in zip(names, vers, isinternals):
             fn.startitem()
             fn.condwrite(ui.verbose, b"name", namefmt, n)
             if ui.verbose:
                 fn.plain(b"%s  " % places[p])
             fn.data(bundled=p)
             fn.condwrite(ui.verbose and v, b"ver", b"%s", v)
             if ui.verbose:
                 fn.plain(b"\n")
     fn.end()
     fm.end()
 
 
 def loadcmdtable(ui, name, cmdtable):
     """Load command functions from specified cmdtable"""
     overrides = [cmd for cmd in cmdtable if cmd in table]
     if overrides:
         ui.warn(
             _(b"extension '%s' overrides commands: %s\n")
             % (name, b" ".join(overrides))
         )
     table.update(cmdtable)

mercurial/merge.py

@@ -1,2527 +1,2515 b''
 # merge.py - directory-level update/merge handling for Mercurial
 #
 # Copyright 2006, 2007 Olivia Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import collections
 import errno
 import struct
 
 from .i18n import _
 from .node import nullrev
 from .thirdparty import attr
 from .utils import stringutil
 from .dirstateutils import timestamp
 from . import (
     copies,
     encoding,
     error,
     filemerge,
     match as matchmod,
     mergestate as mergestatemod,
     obsutil,
     pathutil,
     pycompat,
     scmutil,
     subrepoutil,
     util,
     worker,
 )
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 
 def _getcheckunknownconfig(repo, section, name):
     config = repo.ui.config(section, name)
     valid = [b'abort', b'ignore', b'warn']
     if config not in valid:
         validstr = b', '.join([b"'" + v + b"'" for v in valid])
         raise error.ConfigError(
             _(b"%s.%s not valid ('%s' is none of %s)")
             % (section, name, config, validstr)
         )
     return config
 
 
 def _checkunknownfile(repo, wctx, mctx, f, f2=None):
     if wctx.isinmemory():
         # Nothing to do in IMM because nothing in the "working copy" can be an
         # unknown file.
         #
         # Note that we should bail out here, not in ``_checkunknownfiles()``,
         # because that function does other useful work.
         return False
 
     if f2 is None:
         f2 = f
     return (
         repo.wvfs.audit.check(f)
         and repo.wvfs.isfileorlink(f)
         and repo.dirstate.normalize(f) not in repo.dirstate
         and mctx[f2].cmp(wctx[f])
     )
 
 
 class _unknowndirschecker(object):
     """
     Look for any unknown files or directories that may have a path conflict
     with a file.  If any path prefix of the file exists as a file or link,
     then it conflicts.  If the file itself is a directory that contains any
     file that is not tracked, then it conflicts.
 
     Returns the shortest path at which a conflict occurs, or None if there is
     no conflict.
     """
 
     def __init__(self):
         # A set of paths known to be good.  This prevents repeated checking of
         # dirs.  It will be updated with any new dirs that are checked and found
         # to be safe.
         self._unknowndircache = set()
 
         # A set of paths that are known to be absent.  This prevents repeated
         # checking of subdirectories that are known not to exist. It will be
         # updated with any new dirs that are checked and found to be absent.
         self._missingdircache = set()
 
     def __call__(self, repo, wctx, f):
         if wctx.isinmemory():
             # Nothing to do in IMM for the same reason as ``_checkunknownfile``.
             return False
 
         # Check for path prefixes that exist as unknown files.
         for p in reversed(list(pathutil.finddirs(f))):
             if p in self._missingdircache:
                 return
             if p in self._unknowndircache:
                 continue
             if repo.wvfs.audit.check(p):
                 if (
                     repo.wvfs.isfileorlink(p)
                     and repo.dirstate.normalize(p) not in repo.dirstate
                 ):
                     return p
                 if not repo.wvfs.lexists(p):
                     self._missingdircache.add(p)
                     return
                 self._unknowndircache.add(p)
 
         # Check if the file conflicts with a directory containing unknown files.
         if repo.wvfs.audit.check(f) and repo.wvfs.isdir(f):
             # Does the directory contain any files that are not in the dirstate?
             for p, dirs, files in repo.wvfs.walk(f):
                 for fn in files:
                     relf = util.pconvert(repo.wvfs.reljoin(p, fn))
                     relf = repo.dirstate.normalize(relf, isknown=True)
                     if relf not in repo.dirstate:
                         return f
         return None
 
 
 def _checkunknownfiles(repo, wctx, mctx, force, mresult, mergeforce):
     """
     Considers any actions that care about the presence of conflicting unknown
     files. For some actions, the result is to abort; for others, it is to
     choose a different action.
     """
     fileconflicts = set()
     pathconflicts = set()
     warnconflicts = set()
     abortconflicts = set()
     unknownconfig = _getcheckunknownconfig(repo, b'merge', b'checkunknown')
     ignoredconfig = _getcheckunknownconfig(repo, b'merge', b'checkignored')
     pathconfig = repo.ui.configbool(
         b'experimental', b'merge.checkpathconflicts'
     )
     if not force:
 
         def collectconflicts(conflicts, config):
             if config == b'abort':
                 abortconflicts.update(conflicts)
             elif config == b'warn':
                 warnconflicts.update(conflicts)
 
         checkunknowndirs = _unknowndirschecker()
         for f in mresult.files(
             (
                 mergestatemod.ACTION_CREATED,
                 mergestatemod.ACTION_DELETED_CHANGED,
             )
         ):
             if _checkunknownfile(repo, wctx, mctx, f):
                 fileconflicts.add(f)
             elif pathconfig and f not in wctx:
                 path = checkunknowndirs(repo, wctx, f)
                 if path is not None:
                     pathconflicts.add(path)
         for f, args, msg in mresult.getactions(
             [mergestatemod.ACTION_LOCAL_DIR_RENAME_GET]
         ):
             if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                 fileconflicts.add(f)
 
         allconflicts = fileconflicts | pathconflicts
         ignoredconflicts = {c for c in allconflicts if repo.dirstate._ignore(c)}
         unknownconflicts = allconflicts - ignoredconflicts
         collectconflicts(ignoredconflicts, ignoredconfig)
         collectconflicts(unknownconflicts, unknownconfig)
     else:
         for f, args, msg in list(
             mresult.getactions([mergestatemod.ACTION_CREATED_MERGE])
         ):
             fl2, anc = args
             different = _checkunknownfile(repo, wctx, mctx, f)
             if repo.dirstate._ignore(f):
                 config = ignoredconfig
             else:
                 config = unknownconfig
 
             # The behavior when force is True is described by this table:
             #  config  different  mergeforce  |    action    backup
             #    *         n          *       |      get        n
             #    *         y          y       |     merge       -
             #   abort      y          n       |     merge       -   (1)
             #   warn       y          n       |  warn + get     y
             #  ignore      y          n       |      get        y
             #
             # (1) this is probably the wrong behavior here -- we should
             #     probably abort, but some actions like rebases currently
             #     don't like an abort happening in the middle of
             #     merge.update.
             if not different:
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_GET,
                     (fl2, False),
                     b'remote created',
                 )
             elif mergeforce or config == b'abort':
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_MERGE,
                     (f, f, None, False, anc),
                     b'remote differs from untracked local',
                 )
             elif config == b'abort':
                 abortconflicts.add(f)
             else:
                 if config == b'warn':
                     warnconflicts.add(f)
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_GET,
                     (fl2, True),
                     b'remote created',
                 )
 
     for f in sorted(abortconflicts):
         warn = repo.ui.warn
         if f in pathconflicts:
             if repo.wvfs.isfileorlink(f):
                 warn(_(b"%s: untracked file conflicts with directory\n") % f)
             else:
                 warn(_(b"%s: untracked directory conflicts with file\n") % f)
         else:
             warn(_(b"%s: untracked file differs\n") % f)
     if abortconflicts:
         raise error.StateError(
             _(
                 b"untracked files in working directory "
                 b"differ from files in requested revision"
             )
         )
 
     for f in sorted(warnconflicts):
         if repo.wvfs.isfileorlink(f):
             repo.ui.warn(_(b"%s: replacing untracked file\n") % f)
         else:
             repo.ui.warn(_(b"%s: replacing untracked files in directory\n") % f)
 
     for f, args, msg in list(
         mresult.getactions([mergestatemod.ACTION_CREATED])
     ):
         backup = (
             f in fileconflicts
             or f in pathconflicts
             or any(p in pathconflicts for p in pathutil.finddirs(f))
         )
         (flags,) = args
         mresult.addfile(f, mergestatemod.ACTION_GET, (flags, backup), msg)
 
 
 def _forgetremoved(wctx, mctx, branchmerge, mresult):
     """
     Forget removed files
 
     If we're jumping between revisions (as opposed to merging), and if
     neither the working directory nor the target rev has the file,
     then we need to remove it from the dirstate, to prevent the
     dirstate from listing the file when it is no longer in the
     manifest.
 
     If we're merging, and the other revision has removed a file
     that is not present in the working directory, we need to mark it
     as removed.
     """
 
     m = mergestatemod.ACTION_FORGET
     if branchmerge:
         m = mergestatemod.ACTION_REMOVE
     for f in wctx.deleted():
         if f not in mctx:
             mresult.addfile(f, m, None, b"forget deleted")
 
     if not branchmerge:
         for f in wctx.removed():
             if f not in mctx:
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_FORGET,
                     None,
                     b"forget removed",
                 )
 
 
 def _checkcollision(repo, wmf, mresult):
     """
     Check for case-folding collisions.
     """
     # If the repo is narrowed, filter out files outside the narrowspec.
     narrowmatch = repo.narrowmatch()
     if not narrowmatch.always():
         pmmf = set(wmf.walk(narrowmatch))
         if mresult:
             for f in list(mresult.files()):
                 if not narrowmatch(f):
                     mresult.removefile(f)
     else:
         # build provisional merged manifest up
         pmmf = set(wmf)
 
     if mresult:
         # KEEP and EXEC are no-op
         for f in mresult.files(
             (
                 mergestatemod.ACTION_ADD,
                 mergestatemod.ACTION_ADD_MODIFIED,
                 mergestatemod.ACTION_FORGET,
                 mergestatemod.ACTION_GET,
                 mergestatemod.ACTION_CHANGED_DELETED,
                 mergestatemod.ACTION_DELETED_CHANGED,
             )
         ):
             pmmf.add(f)
         for f in mresult.files((mergestatemod.ACTION_REMOVE,)):
             pmmf.discard(f)
         for f, args, msg in mresult.getactions(
             [mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL]
         ):
             f2, flags = args
             pmmf.discard(f2)
             pmmf.add(f)
         for f in mresult.files((mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,)):
             pmmf.add(f)
         for f, args, msg in mresult.getactions([mergestatemod.ACTION_MERGE]):
             f1, f2, fa, move, anc = args
             if move:
                 pmmf.discard(f1)
             pmmf.add(f)
 
     # check case-folding collision in provisional merged manifest
     foldmap = {}
     for f in pmmf:
         fold = util.normcase(f)
         if fold in foldmap:
             raise error.StateError(
                 _(b"case-folding collision between %s and %s")
                 % (f, foldmap[fold])
             )
         foldmap[fold] = f
 
     # check case-folding of directories
     foldprefix = unfoldprefix = lastfull = b''
     for fold, f in sorted(foldmap.items()):
         if fold.startswith(foldprefix) and not f.startswith(unfoldprefix):
             # the folded prefix matches but actual casing is different
             raise error.StateError(
                 _(b"case-folding collision between %s and directory of %s")
                 % (lastfull, f)
             )
         foldprefix = fold + b'/'
         unfoldprefix = f + b'/'
         lastfull = f
 
 
 def _filesindirs(repo, manifest, dirs):
     """
     Generator that yields pairs of all the files in the manifest that are found
     inside the directories listed in dirs, and which directory they are found
     in.
     """
     for f in manifest:
         for p in pathutil.finddirs(f):
             if p in dirs:
                 yield f, p
                 break
 
 
 def checkpathconflicts(repo, wctx, mctx, mresult):
     """
     Check if any actions introduce path conflicts in the repository, updating
     actions to record or handle the path conflict accordingly.
     """
     mf = wctx.manifest()
 
     # The set of local files that conflict with a remote directory.
     localconflicts = set()
 
     # The set of directories that conflict with a remote file, and so may cause
     # conflicts if they still contain any files after the merge.
     remoteconflicts = set()
 
     # The set of directories that appear as both a file and a directory in the
     # remote manifest.  These indicate an invalid remote manifest, which
     # can't be updated to cleanly.
     invalidconflicts = set()
 
     # The set of directories that contain files that are being created.
     createdfiledirs = set()
 
     # The set of files deleted by all the actions.
     deletedfiles = set()
 
     for f in mresult.files(
         (
             mergestatemod.ACTION_CREATED,
             mergestatemod.ACTION_DELETED_CHANGED,
             mergestatemod.ACTION_MERGE,
             mergestatemod.ACTION_CREATED_MERGE,
         )
     ):
         # This action may create a new local file.
         createdfiledirs.update(pathutil.finddirs(f))
         if mf.hasdir(f):
             # The file aliases a local directory.  This might be ok if all
             # the files in the local directory are being deleted.  This
             # will be checked once we know what all the deleted files are.
             remoteconflicts.add(f)
     # Track the names of all deleted files.
     for f in mresult.files((mergestatemod.ACTION_REMOVE,)):
         deletedfiles.add(f)
     for (f, args, msg) in mresult.getactions((mergestatemod.ACTION_MERGE,)):
         f1, f2, fa, move, anc = args
         if move:
             deletedfiles.add(f1)
     for (f, args, msg) in mresult.getactions(
         (mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,)
     ):
         f2, flags = args
         deletedfiles.add(f2)
 
     # Check all directories that contain created files for path conflicts.
     for p in createdfiledirs:
         if p in mf:
             if p in mctx:
                 # A file is in a directory which aliases both a local
                 # and a remote file.  This is an internal inconsistency
                 # within the remote manifest.
                 invalidconflicts.add(p)
             else:
                 # A file is in a directory which aliases a local file.
                 # We will need to rename the local file.
                 localconflicts.add(p)
         pd = mresult.getfile(p)
         if pd and pd[0] in (
             mergestatemod.ACTION_CREATED,
             mergestatemod.ACTION_DELETED_CHANGED,
             mergestatemod.ACTION_MERGE,
             mergestatemod.ACTION_CREATED_MERGE,
         ):
             # The file is in a directory which aliases a remote file.
             # This is an internal inconsistency within the remote
             # manifest.
             invalidconflicts.add(p)
 
     # Rename all local conflicting files that have not been deleted.
     for p in localconflicts:
         if p not in deletedfiles:
             ctxname = bytes(wctx).rstrip(b'+')
             pnew = util.safename(p, ctxname, wctx, set(mresult.files()))
             porig = wctx[p].copysource() or p
             mresult.addfile(
                 pnew,
                 mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
                 (p, porig),
                 b'local path conflict',
             )
             mresult.addfile(
                 p,
                 mergestatemod.ACTION_PATH_CONFLICT,
                 (pnew, b'l'),
                 b'path conflict',
             )
 
     if remoteconflicts:
         # Check if all files in the conflicting directories have been removed.
         ctxname = bytes(mctx).rstrip(b'+')
         for f, p in _filesindirs(repo, mf, remoteconflicts):
             if f not in deletedfiles:
                 m, args, msg = mresult.getfile(p)
                 pnew = util.safename(p, ctxname, wctx, set(mresult.files()))
                 if m in (
                     mergestatemod.ACTION_DELETED_CHANGED,
                     mergestatemod.ACTION_MERGE,
                 ):
                     # Action was merge, just update target.
                     mresult.addfile(pnew, m, args, msg)
                 else:
                     # Action was create, change to renamed get action.
                     fl = args[0]
                     mresult.addfile(
                         pnew,
                         mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
                         (p, fl),
                         b'remote path conflict',
                     )
                 mresult.addfile(
                     p,
                     mergestatemod.ACTION_PATH_CONFLICT,
                     (pnew, mergestatemod.ACTION_REMOVE),
                     b'path conflict',
                 )
                 remoteconflicts.remove(p)
                 break
 
     if invalidconflicts:
         for p in invalidconflicts:
             repo.ui.warn(_(b"%s: is both a file and a directory\n") % p)
         raise error.StateError(
             _(b"destination manifest contains path conflicts")
         )
 
 
 def _filternarrowactions(narrowmatch, branchmerge, mresult):
     """
     Filters out actions that can ignored because the repo is narrowed.
 
     Raise an exception if the merge cannot be completed because the repo is
     narrowed.
     """
     # TODO: handle with nonconflicttypes
     nonconflicttypes = {
         mergestatemod.ACTION_ADD,
         mergestatemod.ACTION_ADD_MODIFIED,
         mergestatemod.ACTION_CREATED,
         mergestatemod.ACTION_CREATED_MERGE,
         mergestatemod.ACTION_FORGET,
         mergestatemod.ACTION_GET,
         mergestatemod.ACTION_REMOVE,
         mergestatemod.ACTION_EXEC,
     }
     # We mutate the items in the dict during iteration, so iterate
     # over a copy.
     for f, action in mresult.filemap():
         if narrowmatch(f):
             pass
         elif not branchmerge:
             mresult.removefile(f)  # just updating, ignore changes outside clone
         elif action[0] in mergestatemod.NO_OP_ACTIONS:
             mresult.removefile(f)  # merge does not affect file
         elif action[0] in nonconflicttypes:
             raise error.Abort(
                 _(
                     b'merge affects file \'%s\' outside narrow, '
                     b'which is not yet supported'
                 )
                 % f,
                 hint=_(b'merging in the other direction may work'),
             )
         else:
             raise error.StateError(
                 _(b'conflict in file \'%s\' is outside narrow clone') % f
             )
 
 
 class mergeresult(object):
     """An object representing result of merging manifests.
 
     It has information about what actions need to be performed on dirstate
     mapping of divergent renames and other such cases."""
 
     def __init__(self):
         """
         filemapping: dict of filename as keys and action related info as values
         diverge: mapping of source name -> list of dest name for
                  divergent renames
         renamedelete: mapping of source name -> list of destinations for files
                       deleted on one side and renamed on other.
         commitinfo: dict containing data which should be used on commit
                     contains a filename -> info mapping
         actionmapping: dict of action names as keys and values are dict of
                        filename as key and related data as values
         """
         self._filemapping = {}
         self._diverge = {}
         self._renamedelete = {}
         self._commitinfo = collections.defaultdict(dict)
         self._actionmapping = collections.defaultdict(dict)
 
     def updatevalues(self, diverge, renamedelete):
         self._diverge = diverge
         self._renamedelete = renamedelete
 
     def addfile(self, filename, action, data, message):
         """adds a new file to the mergeresult object
 
         filename: file which we are adding
         action: one of mergestatemod.ACTION_*
         data: a tuple of information like fctx and ctx related to this merge
         message: a message about the merge
         """
         # if the file already existed, we need to delete it's old
         # entry form _actionmapping too
         if filename in self._filemapping:
             a, d, m = self._filemapping[filename]
             del self._actionmapping[a][filename]
 
         self._filemapping[filename] = (action, data, message)
         self._actionmapping[action][filename] = (data, message)
 
     def getfile(self, filename, default_return=None):
         """returns (action, args, msg) about this file
 
         returns default_return if the file is not present"""
         if filename in self._filemapping:
             return self._filemapping[filename]
         return default_return
 
     def files(self, actions=None):
         """returns files on which provided action needs to perfromed
 
         If actions is None, all files are returned
         """
         # TODO: think whether we should return renamedelete and
         # diverge filenames also
         if actions is None:
             for f in self._filemapping:
                 yield f
 
         else:
             for a in actions:
                 for f in self._actionmapping[a]:
                     yield f
 
     def removefile(self, filename):
         """removes a file from the mergeresult object as the file might
         not merging anymore"""
         action, data, message = self._filemapping[filename]
         del self._filemapping[filename]
         del self._actionmapping[action][filename]
 
     def getactions(self, actions, sort=False):
         """get list of files which are marked with these actions
         if sort is true, files for each action is sorted and then added
 
         Returns a list of tuple of form (filename, data, message)
         """
         for a in actions:
             if sort:
                 for f in sorted(self._actionmapping[a]):
                     args, msg = self._actionmapping[a][f]
                     yield f, args, msg
             else:
                 for f, (args, msg) in pycompat.iteritems(
                     self._actionmapping[a]
                 ):
                     yield f, args, msg
 
     def len(self, actions=None):
         """returns number of files which needs actions
 
         if actions is passed, total of number of files in that action
         only is returned"""
 
         if actions is None:
             return len(self._filemapping)
 
         return sum(len(self._actionmapping[a]) for a in actions)
 
     def filemap(self, sort=False):
         if sorted:
             for key, val in sorted(pycompat.iteritems(self._filemapping)):
                 yield key, val
         else:
             for key, val in pycompat.iteritems(self._filemapping):
                 yield key, val
 
     def addcommitinfo(self, filename, key, value):
         """adds key-value information about filename which will be required
         while committing this merge"""
         self._commitinfo[filename][key] = value
 
     @property
     def diverge(self):
         return self._diverge
 
     @property
     def renamedelete(self):
         return self._renamedelete
 
     @property
     def commitinfo(self):
         return self._commitinfo
 
     @property
     def actionsdict(self):
         """returns a dictionary of actions to be perfomed with action as key
         and a list of files and related arguments as values"""
         res = collections.defaultdict(list)
         for a, d in pycompat.iteritems(self._actionmapping):
             for f, (args, msg) in pycompat.iteritems(d):
                 res[a].append((f, args, msg))
         return res
 
     def setactions(self, actions):
         self._filemapping = actions
         self._actionmapping = collections.defaultdict(dict)
         for f, (act, data, msg) in pycompat.iteritems(self._filemapping):
             self._actionmapping[act][f] = data, msg
 
     def hasconflicts(self):
         """tells whether this merge resulted in some actions which can
         result in conflicts or not"""
         for a in self._actionmapping.keys():
             if (
                 a
                 not in (
                     mergestatemod.ACTION_GET,
                     mergestatemod.ACTION_EXEC,
                     mergestatemod.ACTION_REMOVE,
                     mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
                 )
                 and self._actionmapping[a]
                 and a not in mergestatemod.NO_OP_ACTIONS
             ):
                 return True
 
         return False
 
 
 def manifestmerge(
     repo,
     wctx,
     p2,
     pa,
     branchmerge,
     force,
     matcher,
     acceptremote,
     followcopies,
     forcefulldiff=False,
 ):
     """
     Merge wctx and p2 with ancestor pa and generate merge action list
 
     branchmerge and force are as passed in to update
     matcher = matcher to filter file lists
     acceptremote = accept the incoming changes without prompting
 
     Returns an object of mergeresult class
     """
     mresult = mergeresult()
     if matcher is not None and matcher.always():
         matcher = None
 
     # manifests fetched in order are going to be faster, so prime the caches
     [
         x.manifest()
         for x in sorted(wctx.parents() + [p2, pa], key=scmutil.intrev)
     ]
 
     branch_copies1 = copies.branch_copies()
     branch_copies2 = copies.branch_copies()
     diverge = {}
     # information from merge which is needed at commit time
     # for example choosing filelog of which parent to commit
     # TODO: use specific constants in future for this mapping
     if followcopies:
         branch_copies1, branch_copies2, diverge = copies.mergecopies(
             repo, wctx, p2, pa
         )
 
     boolbm = pycompat.bytestr(bool(branchmerge))
     boolf = pycompat.bytestr(bool(force))
     boolm = pycompat.bytestr(bool(matcher))
     repo.ui.note(_(b"resolving manifests\n"))
     repo.ui.debug(
         b" branchmerge: %s, force: %s, partial: %s\n" % (boolbm, boolf, boolm)
     )
     repo.ui.debug(b" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
 
     m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
     copied1 = set(branch_copies1.copy.values())
     copied1.update(branch_copies1.movewithdir.values())
     copied2 = set(branch_copies2.copy.values())
     copied2.update(branch_copies2.movewithdir.values())
 
     if b'.hgsubstate' in m1 and wctx.rev() is None:
         # Check whether sub state is modified, and overwrite the manifest
         # to flag the change. If wctx is a committed revision, we shouldn't
         # care for the dirty state of the working directory.
         if any(wctx.sub(s).dirty() for s in wctx.substate):
             m1[b'.hgsubstate'] = repo.nodeconstants.modifiednodeid
 
     # Don't use m2-vs-ma optimization if:
     # - ma is the same as m1 or m2, which we're just going to diff again later
     # - The caller specifically asks for a full diff, which is useful during bid
     #   merge.
     # - we are tracking salvaged files specifically hence should process all
     #   files
     if (
         pa not in ([wctx, p2] + wctx.parents())
         and not forcefulldiff
         and not (
             repo.ui.configbool(b'experimental', b'merge-track-salvaged')
             or repo.filecopiesmode == b'changeset-sidedata'
         )
     ):
         # Identify which files are relevant to the merge, so we can limit the
         # total m1-vs-m2 diff to just those files. This has significant
         # performance benefits in large repositories.
         relevantfiles = set(ma.diff(m2).keys())
 
         # For copied and moved files, we need to add the source file too.
         for copykey, copyvalue in pycompat.iteritems(branch_copies1.copy):
             if copyvalue in relevantfiles:
                 relevantfiles.add(copykey)
         for movedirkey in branch_copies1.movewithdir:
             relevantfiles.add(movedirkey)
         filesmatcher = scmutil.matchfiles(repo, relevantfiles)
         matcher = matchmod.intersectmatchers(matcher, filesmatcher)
 
     diff = m1.diff(m2, match=matcher)
 
     for f, ((n1, fl1), (n2, fl2)) in pycompat.iteritems(diff):
         if n1 and n2:  # file exists on both local and remote side
             if f not in ma:
                 # TODO: what if they're renamed from different sources?
                 fa = branch_copies1.copy.get(
                     f, None
                 ) or branch_copies2.copy.get(f, None)
                 args, msg = None, None
                 if fa is not None:
                     args = (f, f, fa, False, pa.node())
                     msg = b'both renamed from %s' % fa
                 else:
                     args = (f, f, None, False, pa.node())
                     msg = b'both created'
                 mresult.addfile(f, mergestatemod.ACTION_MERGE, args, msg)
             elif f in branch_copies1.copy:
                 fa = branch_copies1.copy[f]
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_MERGE,
                     (f, fa, fa, False, pa.node()),
                     b'local replaced from %s' % fa,
                 )
             elif f in branch_copies2.copy:
                 fa = branch_copies2.copy[f]
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_MERGE,
                     (fa, f, fa, False, pa.node()),
                     b'other replaced from %s' % fa,
                 )
             else:
                 a = ma[f]
                 fla = ma.flags(f)
                 nol = b'l' not in fl1 + fl2 + fla
                 if n2 == a and fl2 == fla:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_KEEP,
                         (),
                         b'remote unchanged',
                     )
                 elif n1 == a and fl1 == fla:  # local unchanged - use remote
                     if n1 == n2:  # optimization: keep local content
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_EXEC,
                             (fl2,),
                             b'update permissions',
                         )
                     else:
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_GET,
                             (fl2, False),
                             b'remote is newer',
                         )
                         if branchmerge:
                             mresult.addcommitinfo(
                                 f, b'filenode-source', b'other'
                             )
                 elif nol and n2 == a:  # remote only changed 'x'
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_EXEC,
                         (fl2,),
                         b'update permissions',
                     )
                 elif nol and n1 == a:  # local only changed 'x'
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_GET,
                         (fl1, False),
                         b'remote is newer',
                     )
                     if branchmerge:
                         mresult.addcommitinfo(f, b'filenode-source', b'other')
                 else:  # both changed something
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_MERGE,
                         (f, f, f, False, pa.node()),
                         b'versions differ',
                     )
         elif n1:  # file exists only on local side
             if f in copied2:
                 pass  # we'll deal with it on m2 side
             elif (
                 f in branch_copies1.movewithdir
             ):  # directory rename, move local
                 f2 = branch_copies1.movewithdir[f]
                 if f2 in m2:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_MERGE,
                         (f, f2, None, True, pa.node()),
                         b'remote directory rename, both created',
                     )
                 else:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
                         (f, fl1),
                         b'remote directory rename - move from %s' % f,
                     )
             elif f in branch_copies1.copy:
                 f2 = branch_copies1.copy[f]
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_MERGE,
                     (f, f2, f2, False, pa.node()),
                     b'local copied/moved from %s' % f2,
                 )
             elif f in ma:  # clean, a different, no remote
                 if n1 != ma[f]:
                     if acceptremote:
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_REMOVE,
                             None,
                             b'remote delete',
                         )
                     else:
                         mresult.addfile(
                             f,
                             mergestatemod.ACTION_CHANGED_DELETED,
                             (f, None, f, False, pa.node()),
                             b'prompt changed/deleted',
                         )
                         if branchmerge:
                             mresult.addcommitinfo(
                                 f, b'merge-removal-candidate', b'yes'
                             )
                 elif n1 == repo.nodeconstants.addednodeid:
                     # This file was locally added. We should forget it instead of
                     # deleting it.
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_FORGET,
                         None,
                         b'remote deleted',
                     )
                 else:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_REMOVE,
                         None,
                         b'other deleted',
                     )
                     if branchmerge:
                         # the file must be absent after merging,
                         # howeber the user might make
                         # the file reappear using revert and if they does,
                         # we force create a new node
                         mresult.addcommitinfo(
                             f, b'merge-removal-candidate', b'yes'
                         )
 
             else:  # file not in ancestor, not in remote
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_KEEP_NEW,
                     None,
                     b'ancestor missing, remote missing',
                 )
 
         elif n2:  # file exists only on remote side
             if f in copied1:
                 pass  # we'll deal with it on m1 side
             elif f in branch_copies2.movewithdir:
                 f2 = branch_copies2.movewithdir[f]
                 if f2 in m1:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_MERGE,
                         (f2, f, None, False, pa.node()),
                         b'local directory rename, both created',
                     )
                 else:
                     mresult.addfile(
                         f2,
                         mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
                         (f, fl2),
                         b'local directory rename - get from %s' % f,
                     )
             elif f in branch_copies2.copy:
                 f2 = branch_copies2.copy[f]
                 msg, args = None, None
                 if f2 in m2:
                     args = (f2, f, f2, False, pa.node())
                     msg = b'remote copied from %s' % f2
                 else:
                     args = (f2, f, f2, True, pa.node())
                     msg = b'remote moved from %s' % f2
                 mresult.addfile(f, mergestatemod.ACTION_MERGE, args, msg)
             elif f not in ma:
                 # local unknown, remote created: the logic is described by the
                 # following table:
                 #
                 # force  branchmerge  different  |  action
                 #   n         *           *      |   create
                 #   y         n           *      |   create
                 #   y         y           n      |   create
                 #   y         y           y      |   merge
                 #
                 # Checking whether the files are different is expensive, so we
                 # don't do that when we can avoid it.
                 if not force:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED,
                         (fl2,),
                         b'remote created',
                     )
                 elif not branchmerge:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED,
                         (fl2,),
                         b'remote created',
                     )
                 else:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED_MERGE,
                         (fl2, pa.node()),
                         b'remote created, get or merge',
                     )
             elif n2 != ma[f]:
                 df = None
                 for d in branch_copies1.dirmove:
                     if f.startswith(d):
                         # new file added in a directory that was moved
                         df = branch_copies1.dirmove[d] + f[len(d) :]
                         break
                 if df is not None and df in m1:
                     mresult.addfile(
                         df,
                         mergestatemod.ACTION_MERGE,
                         (df, f, f, False, pa.node()),
                         b'local directory rename - respect move '
                         b'from %s' % f,
                     )
                 elif acceptremote:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_CREATED,
                         (fl2,),
                         b'remote recreating',
                     )
                 else:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_DELETED_CHANGED,
                         (None, f, f, False, pa.node()),
                         b'prompt deleted/changed',
                     )
                     if branchmerge:
                         mresult.addcommitinfo(
                             f, b'merge-removal-candidate', b'yes'
                         )
             else:
                 mresult.addfile(
                     f,
                     mergestatemod.ACTION_KEEP_ABSENT,
                     None,
                     b'local not present, remote unchanged',
                 )
                 if branchmerge:
                     # the file must be absent after merging
                     # however the user might make
                     # the file reappear using revert and if they does,
                     # we force create a new node
                     mresult.addcommitinfo(f, b'merge-removal-candidate', b'yes')
 
     if repo.ui.configbool(b'experimental', b'merge.checkpathconflicts'):
         # If we are merging, look for path conflicts.
         checkpathconflicts(repo, wctx, p2, mresult)
 
     narrowmatch = repo.narrowmatch()
     if not narrowmatch.always():
         # Updates "actions" in place
         _filternarrowactions(narrowmatch, branchmerge, mresult)
 
     renamedelete = branch_copies1.renamedelete
     renamedelete.update(branch_copies2.renamedelete)
 
     mresult.updatevalues(diverge, renamedelete)
     return mresult
 
 
 def _resolvetrivial(repo, wctx, mctx, ancestor, mresult):
     """Resolves false conflicts where the nodeid changed but the content
     remained the same."""
     # We force a copy of actions.items() because we're going to mutate
     # actions as we resolve trivial conflicts.
     for f in list(mresult.files((mergestatemod.ACTION_CHANGED_DELETED,))):
         if f in ancestor and not wctx[f].cmp(ancestor[f]):
             # local did change but ended up with same content
             mresult.addfile(
                 f, mergestatemod.ACTION_REMOVE, None, b'prompt same'
             )
 
     for f in list(mresult.files((mergestatemod.ACTION_DELETED_CHANGED,))):
         if f in ancestor and not mctx[f].cmp(ancestor[f]):
             # remote did change but ended up with same content
             mresult.removefile(f)  # don't get = keep local deleted
 
 
 def calculateupdates(
     repo,
     wctx,
     mctx,
     ancestors,
     branchmerge,
     force,
     acceptremote,
     followcopies,
     matcher=None,
     mergeforce=False,
 ):
     """
     Calculate the actions needed to merge mctx into wctx using ancestors
 
     Uses manifestmerge() to merge manifest and get list of actions required to
     perform for merging two manifests. If there are multiple ancestors, uses bid
     merge if enabled.
 
     Also filters out actions which are unrequired if repository is sparse.
 
     Returns mergeresult object same as manifestmerge().
     """
     # Avoid cycle.
     from . import sparse
 
     mresult = None
     if len(ancestors) == 1:  # default
         mresult = manifestmerge(
             repo,
             wctx,
             mctx,
             ancestors[0],
             branchmerge,
             force,
             matcher,
             acceptremote,
             followcopies,
         )
         _checkunknownfiles(repo, wctx, mctx, force, mresult, mergeforce)
 
     else:  # only when merge.preferancestor=* - the default
         repo.ui.note(
             _(b"note: merging %s and %s using bids from ancestors %s\n")
             % (
                 wctx,
                 mctx,
                 _(b' and ').join(pycompat.bytestr(anc) for anc in ancestors),
             )
         )
 
         # mapping filename to bids (action method to list af actions)
         # {FILENAME1 : BID1, FILENAME2 : BID2}
         # BID is another dictionary which contains
         # mapping of following form:
         # {ACTION_X : [info, ..], ACTION_Y : [info, ..]}
         fbids = {}
         mresult = mergeresult()
         diverge, renamedelete = None, None
         for ancestor in ancestors:
             repo.ui.note(_(b'\ncalculating bids for ancestor %s\n') % ancestor)
             mresult1 = manifestmerge(
                 repo,
                 wctx,
                 mctx,
                 ancestor,
                 branchmerge,
                 force,
                 matcher,
                 acceptremote,
                 followcopies,
                 forcefulldiff=True,
             )
             _checkunknownfiles(repo, wctx, mctx, force, mresult1, mergeforce)
 
             # Track the shortest set of warning on the theory that bid
             # merge will correctly incorporate more information
             if diverge is None or len(mresult1.diverge) < len(diverge):
                 diverge = mresult1.diverge
             if renamedelete is None or len(renamedelete) < len(
                 mresult1.renamedelete
             ):
                 renamedelete = mresult1.renamedelete
 
             # blindly update final mergeresult commitinfo with what we get
             # from mergeresult object for each ancestor
             # TODO: some commitinfo depends on what bid merge choose and hence
             # we will need to make commitinfo also depend on bid merge logic
             mresult._commitinfo.update(mresult1._commitinfo)
 
             for f, a in mresult1.filemap(sort=True):
                 m, args, msg = a
                 repo.ui.debug(b' %s: %s -> %s\n' % (f, msg, m))
                 if f in fbids:
                     d = fbids[f]
                     if m in d:
                         d[m].append(a)
                     else:
                         d[m] = [a]
                 else:
                     fbids[f] = {m: [a]}
 
         # Call for bids
         # Pick the best bid for each file
         repo.ui.note(
             _(b'\nauction for merging merge bids (%d ancestors)\n')
             % len(ancestors)
         )
         for f, bids in sorted(fbids.items()):
             if repo.ui.debugflag:
                 repo.ui.debug(b" list of bids for %s:\n" % f)
                 for m, l in sorted(bids.items()):
                     for _f, args, msg in l:
                         repo.ui.debug(b'   %s -> %s\n' % (msg, m))
             # bids is a mapping from action method to list af actions
             # Consensus?
             if len(bids) == 1:  # all bids are the same kind of method
                 m, l = list(bids.items())[0]
                 if all(a == l[0] for a in l[1:]):  # len(bids) is > 1
                     repo.ui.note(_(b" %s: consensus for %s\n") % (f, m))
                     mresult.addfile(f, *l[0])
                     continue
             # If keep is an option, just do it.
             if mergestatemod.ACTION_KEEP in bids:
                 repo.ui.note(_(b" %s: picking 'keep' action\n") % f)
                 mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP][0])
                 continue
             # If keep absent is an option, just do that
             if mergestatemod.ACTION_KEEP_ABSENT in bids:
                 repo.ui.note(_(b" %s: picking 'keep absent' action\n") % f)
                 mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP_ABSENT][0])
                 continue
             # ACTION_KEEP_NEW and ACTION_CHANGED_DELETED are conflicting actions
             # as one say that file is new while other says that file was present
             # earlier too and has a change delete conflict
             # Let's fall back to conflicting ACTION_CHANGED_DELETED and let user
             # do the right thing
             if (
                 mergestatemod.ACTION_CHANGED_DELETED in bids
                 and mergestatemod.ACTION_KEEP_NEW in bids
             ):
                 repo.ui.note(_(b" %s: picking 'changed/deleted' action\n") % f)
                 mresult.addfile(
                     f, *bids[mergestatemod.ACTION_CHANGED_DELETED][0]
                 )
                 continue
             # If keep new is an option, let's just do that
             if mergestatemod.ACTION_KEEP_NEW in bids:
                 repo.ui.note(_(b" %s: picking 'keep new' action\n") % f)
                 mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP_NEW][0])
                 continue
             # ACTION_GET and ACTION_DELETE_CHANGED are conflicting actions as
             # one action states the file is newer/created on remote side and
             # other states that file is deleted locally and changed on remote
             # side. Let's fallback and rely on a conflicting action to let user
             # do the right thing
             if (
                 mergestatemod.ACTION_DELETED_CHANGED in bids
                 and mergestatemod.ACTION_GET in bids
             ):
                 repo.ui.note(_(b" %s: picking 'delete/changed' action\n") % f)
                 mresult.addfile(
                     f, *bids[mergestatemod.ACTION_DELETED_CHANGED][0]
                 )
                 continue
             # If there are gets and they all agree [how could they not?], do it.
             if mergestatemod.ACTION_GET in bids:
                 ga0 = bids[mergestatemod.ACTION_GET][0]
                 if all(a == ga0 for a in bids[mergestatemod.ACTION_GET][1:]):
                     repo.ui.note(_(b" %s: picking 'get' action\n") % f)
                     mresult.addfile(f, *ga0)
                     continue
             # TODO: Consider other simple actions such as mode changes
             # Handle inefficient democrazy.
             repo.ui.note(_(b' %s: multiple bids for merge action:\n') % f)
             for m, l in sorted(bids.items()):
                 for _f, args, msg in l:
                     repo.ui.note(b'  %s -> %s\n' % (msg, m))
             # Pick random action. TODO: Instead, prompt user when resolving
             m, l = list(bids.items())[0]
             repo.ui.warn(
                 _(b' %s: ambiguous merge - picked %s action\n') % (f, m)
             )
             mresult.addfile(f, *l[0])
             continue
         repo.ui.note(_(b'end of auction\n\n'))
         mresult.updatevalues(diverge, renamedelete)
 
     if wctx.rev() is None:
         _forgetremoved(wctx, mctx, branchmerge, mresult)
 
     sparse.filterupdatesactions(repo, wctx, mctx, branchmerge, mresult)
     _resolvetrivial(repo, wctx, mctx, ancestors[0], mresult)
 
     return mresult
 
 
 def _getcwd():
     try:
         return encoding.getcwd()
     except OSError as err:
         if err.errno == errno.ENOENT:
             return None
         raise
 
 
 def batchremove(repo, wctx, actions):
     """apply removes to the working directory
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     cwd = _getcwd()
     i = 0
     for f, args, msg in actions:
         repo.ui.debug(b" %s: %s -> r\n" % (f, msg))
         if verbose:
             repo.ui.note(_(b"removing %s\n") % f)
         wctx[f].audit()
         try:
             wctx[f].remove(ignoremissing=True)
         except OSError as inst:
             repo.ui.warn(
                 _(b"update failed to remove %s: %s!\n")
                 % (f, stringutil.forcebytestr(inst.strerror))
             )
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
     if cwd and not _getcwd():
         # cwd was removed in the course of removing files; print a helpful
         # warning.
         repo.ui.warn(
             _(
                 b"current directory was removed\n"
                 b"(consider changing to repo root: %s)\n"
             )
             % repo.root
         )
 
 
 def batchget(repo, mctx, wctx, wantfiledata, actions):
     """apply gets to the working directory
 
     mctx is the context to get from
 
     Yields arbitrarily many (False, tuple) for progress updates, followed by
     exactly one (True, filedata). When wantfiledata is false, filedata is an
     empty dict. When wantfiledata is true, filedata[f] is a triple (mode, size,
     mtime) of the file f written for each action.
     """
     filedata = {}
     verbose = repo.ui.verbose
     fctx = mctx.filectx
     ui = repo.ui
     i = 0
     with repo.wvfs.backgroundclosing(ui, expectedcount=len(actions)):
         for f, (flags, backup), msg in actions:
             repo.ui.debug(b" %s: %s -> g\n" % (f, msg))
             if verbose:
                 repo.ui.note(_(b"getting %s\n") % f)
 
             if backup:
                 # If a file or directory exists with the same name, back that
                 # up.  Otherwise, look to see if there is a file that conflicts
                 # with a directory this file is in, and if so, back that up.
                 conflicting = f
                 if not repo.wvfs.lexists(f):
                     for p in pathutil.finddirs(f):
                         if repo.wvfs.isfileorlink(p):
                             conflicting = p
                             break
                 if repo.wvfs.lexists(conflicting):
                     orig = scmutil.backuppath(ui, repo, conflicting)
                     util.rename(repo.wjoin(conflicting), orig)
             wfctx = wctx[f]
             wfctx.clearunknown()
             atomictemp = ui.configbool(b"experimental", b"update.atomic-file")
             size = wfctx.write(
                 fctx(f).data(),
                 flags,
                 backgroundclose=True,
                 atomictemp=atomictemp,
             )
             if wantfiledata:
                 # XXX note that there is a race window between the time we
                 # write the clean data into the file and we stats it. So another
                 # writing process meddling with the file content right after we
                 # wrote it could cause bad stat data to be gathered.
                 #
                 # They are 2 data we gather here
                 # - the mode:
                 #       That we actually just wrote, we should not need to read
                 #       it from disk, (except not all mode might have survived
                 #       the disk round-trip, which is another issue: we should
                 #       not depends on this)
                 # - the mtime,
                 #       On system that support nanosecond precision, the mtime
                 #       could be accurate enough to tell the two writes appart.
                 #       However gathering it in a racy way make the mtime we
                 #       gather "unreliable".
                 #
                 # (note: we get the size from the data we write, which is sane)
                 #
                 # So in theory the data returned here are fully racy, but in
                 # practice "it works mostly fine".
                 #
                 # Do not be surprised if you end up reading this while looking
                 # for the causes of some buggy status. Feel free to improve
                 # this in the future, but we cannot simply stop gathering
                 # information. Otherwise `hg status` call made after a large `hg
                 # update` runs would have to redo a similar amount of work to
                 # restore and compare all files content.
                 s = wfctx.lstat()
                 mode = s.st_mode
                 mtime = timestamp.mtime_of(s)
                 # for dirstate.update_file's parentfiledata argument:
                 filedata[f] = (mode, size, mtime)
             if i == 100:
                 yield False, (i, f)
                 i = 0
             i += 1
     if i > 0:
         yield False, (i, f)
     yield True, filedata
 
 
 def _prefetchfiles(repo, ctx, mresult):
     """Invoke ``scmutil.prefetchfiles()`` for the files relevant to the dict
     of merge actions.  ``ctx`` is the context being merged in."""
 
     # Skipping 'a', 'am', 'f', 'r', 'dm', 'e', 'k', 'p' and 'pr', because they
     # don't touch the context to be merged in.  'cd' is skipped, because
     # changed/deleted never resolves to something from the remote side.
     files = mresult.files(
         [
             mergestatemod.ACTION_GET,
             mergestatemod.ACTION_DELETED_CHANGED,
             mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
             mergestatemod.ACTION_MERGE,
         ]
     )
 
     prefetch = scmutil.prefetchfiles
     matchfiles = scmutil.matchfiles
     prefetch(
         repo,
         [
             (
                 ctx.rev(),
                 matchfiles(repo, files),
             )
         ],
     )
 
 
 @attr.s(frozen=True)
 class updateresult(object):
     updatedcount = attr.ib()
     mergedcount = attr.ib()
     removedcount = attr.ib()
     unresolvedcount = attr.ib()
 
     def isempty(self):
         return not (
             self.updatedcount
             or self.mergedcount
             or self.removedcount
             or self.unresolvedcount
         )
 
 
 def applyupdates(
     repo,
     mresult,
     wctx,
     mctx,
     overwrite,
     wantfiledata,
     labels=None,
 ):
     """apply the merge action list to the working directory
 
     mresult is a mergeresult object representing result of the merge
     wctx is the working copy context
     mctx is the context to be merged into the working copy
 
     Return a tuple of (counts, filedata), where counts is a tuple
     (updated, merged, removed, unresolved) that describes how many
     files were affected by the update, and filedata is as described in
     batchget.
     """
 
     _prefetchfiles(repo, mctx, mresult)
 
     updated, merged, removed = 0, 0, 0
     ms = wctx.mergestate(clean=True)
     ms.start(wctx.p1().node(), mctx.node(), labels)
 
     for f, op in pycompat.iteritems(mresult.commitinfo):
         # the other side of filenode was choosen while merging, store this in
         # mergestate so that it can be reused on commit
         ms.addcommitinfo(f, op)
 
     numupdates = mresult.len() - mresult.len(mergestatemod.NO_OP_ACTIONS)
     progress = repo.ui.makeprogress(
         _(b'updating'), unit=_(b'files'), total=numupdates
     )
 
     if b'.hgsubstate' in mresult._actionmapping[mergestatemod.ACTION_REMOVE]:
         subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
 
     # record path conflicts
     for f, args, msg in mresult.getactions(
         [mergestatemod.ACTION_PATH_CONFLICT], sort=True
     ):
         f1, fo = args
         s = repo.ui.status
         s(
             _(
                 b"%s: path conflict - a file or link has the same name as a "
                 b"directory\n"
             )
             % f
         )
         if fo == b'l':
             s(_(b"the local file has been renamed to %s\n") % f1)
         else:
             s(_(b"the remote file has been renamed to %s\n") % f1)
         s(_(b"resolve manually then use 'hg resolve --mark %s'\n") % f)
         ms.addpathconflict(f, f1, fo)
         progress.increment(item=f)
 
     # When merging in-memory, we can't support worker processes, so set the
     # per-item cost at 0 in that case.
     cost = 0 if wctx.isinmemory() else 0.001
 
     # remove in parallel (must come before resolving path conflicts and getting)
     prog = worker.worker(
         repo.ui,
         cost,
         batchremove,
         (repo, wctx),
         list(mresult.getactions([mergestatemod.ACTION_REMOVE], sort=True)),
     )
     for i, item in prog:
         progress.increment(step=i, item=item)
     removed = mresult.len((mergestatemod.ACTION_REMOVE,))
 
     # resolve path conflicts (must come before getting)
     for f, args, msg in mresult.getactions(
         [mergestatemod.ACTION_PATH_CONFLICT_RESOLVE], sort=True
     ):
         repo.ui.debug(b" %s: %s -> pr\n" % (f, msg))
         (f0, origf0) = args
         if wctx[f0].lexists():
             repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
             wctx[f].audit()
             wctx[f].write(wctx.filectx(f0).data(), wctx.filectx(f0).flags())
             wctx[f0].remove()
         progress.increment(item=f)
 
     # get in parallel.
     threadsafe = repo.ui.configbool(
         b'experimental', b'worker.wdir-get-thread-safe'
     )
     prog = worker.worker(
         repo.ui,
         cost,
         batchget,
         (repo, mctx, wctx, wantfiledata),
         list(mresult.getactions([mergestatemod.ACTION_GET], sort=True)),
         threadsafe=threadsafe,
         hasretval=True,
     )
     getfiledata = {}
     for final, res in prog:
         if final:
             getfiledata = res
         else:
             i, item = res
             progress.increment(step=i, item=item)
 
     if b'.hgsubstate' in mresult._actionmapping[mergestatemod.ACTION_GET]:
         subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
 
     # forget (manifest only, just log it) (must come first)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_FORGET,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> f\n" % (f, msg))
         progress.increment(item=f)
 
     # re-add (manifest only, just log it)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_ADD,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> a\n" % (f, msg))
         progress.increment(item=f)
 
     # re-add/mark as modified (manifest only, just log it)
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_ADD_MODIFIED,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> am\n" % (f, msg))
         progress.increment(item=f)
 
     # keep (noop, just log it)
     for a in mergestatemod.NO_OP_ACTIONS:
         for f, args, msg in mresult.getactions((a,), sort=True):
             repo.ui.debug(b" %s: %s -> %s\n" % (f, msg, a))
             # no progress
 
     # directory rename, move local
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> dm\n" % (f, msg))
         progress.increment(item=f)
         f0, flags = args
         repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
         wctx[f].audit()
         wctx[f].write(wctx.filectx(f0).data(), flags)
         wctx[f0].remove()
 
     # local directory rename, get
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> dg\n" % (f, msg))
         progress.increment(item=f)
         f0, flags = args
         repo.ui.note(_(b"getting %s to %s\n") % (f0, f))
         wctx[f].write(mctx.filectx(f0).data(), flags)
 
     # exec
     for f, args, msg in mresult.getactions(
         (mergestatemod.ACTION_EXEC,), sort=True
     ):
         repo.ui.debug(b" %s: %s -> e\n" % (f, msg))
         progress.increment(item=f)
         (flags,) = args
         wctx[f].audit()
         wctx[f].setflags(b'l' in flags, b'x' in flags)
 
     moves = []
 
     # 'cd' and 'dc' actions are treated like other merge conflicts
     mergeactions = list(
         mresult.getactions(
             [
                 mergestatemod.ACTION_CHANGED_DELETED,
                 mergestatemod.ACTION_DELETED_CHANGED,
                 mergestatemod.ACTION_MERGE,
             ],
             sort=True,
         )
     )
     for f, args, msg in mergeactions:
         f1, f2, fa, move, anc = args
         if f == b'.hgsubstate':  # merged internally
             continue
         if f1 is None:
             fcl = filemerge.absentfilectx(wctx, fa)
         else:
             repo.ui.debug(b" preserving %s for resolve of %s\n" % (f1, f))
             fcl = wctx[f1]
         if f2 is None:
             fco = filemerge.absentfilectx(mctx, fa)
         else:
             fco = mctx[f2]
         actx = repo[anc]
         if fa in actx:
             fca = actx[fa]
         else:
             # TODO: move to absentfilectx
             fca = repo.filectx(f1, fileid=nullrev)
         ms.add(fcl, fco, fca, f)
         if f1 != f and move:
             moves.append(f1)
 
     # remove renamed files after safely stored
     for f in moves:
         if wctx[f].lexists():
             repo.ui.debug(b"removing %s\n" % f)
             wctx[f].audit()
             wctx[f].remove()
 
     # these actions updates the file
     updated = mresult.len(
         (
             mergestatemod.ACTION_GET,
             mergestatemod.ACTION_EXEC,
             mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
             mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
         )
     )
 
     try:
-        # premerge
-        tocomplete = []
         for f, args, msg in mergeactions:
-            repo.ui.debug(b" %s: %s -> m (premerge)\n" % (f, msg))
+            repo.ui.debug(b" %s: %s -> m\n" % (f, msg))
             ms.addcommitinfo(f, {b'merged': b'yes'})
             progress.increment(item=f)
             if f == b'.hgsubstate':  # subrepo states need updating
                 subrepoutil.submerge(
                     repo, wctx, mctx, wctx.ancestor(mctx), overwrite, labels
                 )
                 continue
             wctx[f].audit()
-            complete, r = ms.preresolve(f, wctx)
-            if not complete:
-                numupdates += 1
-                tocomplete.append((f, args, msg))
-
-        # merge
-        for f, args, msg in tocomplete:
-            repo.ui.debug(b" %s: %s -> m (merge)\n" % (f, msg))
-            ms.addcommitinfo(f, {b'merged': b'yes'})
-            progress.increment(item=f, total=numupdates)
             ms.resolve(f, wctx)
 
     except error.InterventionRequired:
         # If the user has merge.on-failure=halt, catch the error and close the
         # merge state "properly".
         pass
     finally:
         ms.commit()
 
     unresolved = ms.unresolvedcount()
 
     msupdated, msmerged, msremoved = ms.counts()
     updated += msupdated
     merged += msmerged
     removed += msremoved
 
     extraactions = ms.actions()
 
     progress.complete()
     return (
         updateresult(updated, merged, removed, unresolved),
         getfiledata,
         extraactions,
     )
 
 
 def _advertisefsmonitor(repo, num_gets, p1node):
     # Advertise fsmonitor when its presence could be useful.
     #
     # We only advertise when performing an update from an empty working
     # directory. This typically only occurs during initial clone.
     #
     # We give users a mechanism to disable the warning in case it is
     # annoying.
     #
     # We only allow on Linux and MacOS because that's where fsmonitor is
     # considered stable.
     fsmonitorwarning = repo.ui.configbool(b'fsmonitor', b'warn_when_unused')
     fsmonitorthreshold = repo.ui.configint(
         b'fsmonitor', b'warn_update_file_count'
     )
     # avoid cycle dirstate -> sparse -> merge -> dirstate
     from . import dirstate
 
     if dirstate.rustmod is not None:
         # When using rust status, fsmonitor becomes necessary at higher sizes
         fsmonitorthreshold = repo.ui.configint(
             b'fsmonitor',
             b'warn_update_file_count_rust',
         )
 
     try:
         # avoid cycle: extensions -> cmdutil -> merge
         from . import extensions
 
         extensions.find(b'fsmonitor')
         fsmonitorenabled = repo.ui.config(b'fsmonitor', b'mode') != b'off'
         # We intentionally don't look at whether fsmonitor has disabled
         # itself because a) fsmonitor may have already printed a warning
         # b) we only care about the config state here.
     except KeyError:
         fsmonitorenabled = False
 
     if (
         fsmonitorwarning
         and not fsmonitorenabled
         and p1node == repo.nullid
         and num_gets >= fsmonitorthreshold
         and pycompat.sysplatform.startswith((b'linux', b'darwin'))
     ):
         repo.ui.warn(
             _(
                 b'(warning: large working directory being used without '
                 b'fsmonitor enabled; enable fsmonitor to improve performance; '
                 b'see "hg help -e fsmonitor")\n'
             )
         )
 
 
 UPDATECHECK_ABORT = b'abort'  # handled at higher layers
 UPDATECHECK_NONE = b'none'
 UPDATECHECK_LINEAR = b'linear'
 UPDATECHECK_NO_CONFLICT = b'noconflict'
 
 
 def _update(
     repo,
     node,
     branchmerge,
     force,
     ancestor=None,
     mergeancestor=False,
     labels=None,
     matcher=None,
     mergeforce=False,
     updatedirstate=True,
     updatecheck=None,
     wc=None,
 ):
     """
     Perform a merge between the working directory and the given node
 
     node = the node to update to
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     matcher = a matcher to filter file lists (dirstate not updated)
     mergeancestor = whether it is merging with an ancestor. If true,
       we should accept the incoming changes for any prompts that occur.
       If false, merging with an ancestor (fast-forward) is only allowed
       between different named branches. This flag is used by rebase extension
       as a temporary fix and should be avoided in general.
     labels = labels to use for base, local and other
     mergeforce = whether the merge was run with 'merge --force' (deprecated): if
       this is True, then 'force' should be True as well.
 
     The table below shows all the behaviors of the update command given the
     -c/--check and -C/--clean or no options, whether the working directory is
     dirty, whether a revision is specified, and the relationship of the parent
     rev to the target rev (linear or not). Match from top first. The -n
     option doesn't exist on the command line, but represents the
     experimental.updatecheck=noconflict option.
 
     This logic is tested by test-update-branches.t.
 
     -c  -C  -n  -m  dirty  rev  linear  |  result
      y   y   *   *    *     *     *     |    (1)
      y   *   y   *    *     *     *     |    (1)
      y   *   *   y    *     *     *     |    (1)
      *   y   y   *    *     *     *     |    (1)
      *   y   *   y    *     *     *     |    (1)
      *   *   y   y    *     *     *     |    (1)
      *   *   *   *    *     n     n     |     x
      *   *   *   *    n     *     *     |    ok
      n   n   n   n    y     *     y     |   merge
      n   n   n   n    y     y     n     |    (2)
      n   n   n   y    y     *     *     |   merge
      n   n   y   n    y     *     *     |  merge if no conflict
      n   y   n   n    y     *     *     |  discard
      y   n   n   n    y     *     *     |    (3)
 
     x = can't happen
     * = don't-care
     1 = incompatible options (checked in commands.py)
     2 = abort: uncommitted changes (commit or update --clean to discard changes)
     3 = abort: uncommitted changes (checked in commands.py)
 
     The merge is performed inside ``wc``, a workingctx-like objects. It defaults
     to repo[None] if None is passed.
 
     Return the same tuple as applyupdates().
     """
     # Avoid cycle.
     from . import sparse
 
     # This function used to find the default destination if node was None, but
     # that's now in destutil.py.
     assert node is not None
     if not branchmerge and not force:
         # TODO: remove the default once all callers that pass branchmerge=False
         # and force=False pass a value for updatecheck. We may want to allow
         # updatecheck='abort' to better suppport some of these callers.
         if updatecheck is None:
             updatecheck = UPDATECHECK_LINEAR
         if updatecheck not in (
             UPDATECHECK_NONE,
             UPDATECHECK_LINEAR,
             UPDATECHECK_NO_CONFLICT,
         ):
             raise ValueError(
                 r'Invalid updatecheck %r (can accept %r)'
                 % (
                     updatecheck,
                     (
                         UPDATECHECK_NONE,
                         UPDATECHECK_LINEAR,
                         UPDATECHECK_NO_CONFLICT,
                     ),
                 )
             )
     if wc is not None and wc.isinmemory():
         maybe_wlock = util.nullcontextmanager()
     else:
         maybe_wlock = repo.wlock()
     with maybe_wlock:
         if wc is None:
             wc = repo[None]
         pl = wc.parents()
         p1 = pl[0]
         p2 = repo[node]
         if ancestor is not None:
             pas = [repo[ancestor]]
         else:
             if repo.ui.configlist(b'merge', b'preferancestor') == [b'*']:
                 cahs = repo.changelog.commonancestorsheads(p1.node(), p2.node())
                 pas = [repo[anc] for anc in (sorted(cahs) or [repo.nullid])]
             else:
                 pas = [p1.ancestor(p2, warn=branchmerge)]
 
         fp1, fp2, xp1, xp2 = p1.node(), p2.node(), bytes(p1), bytes(p2)
 
         overwrite = force and not branchmerge
         ### check phase
         if not overwrite:
             if len(pl) > 1:
                 raise error.StateError(_(b"outstanding uncommitted merge"))
             ms = wc.mergestate()
             if ms.unresolvedcount():
                 raise error.StateError(
                     _(b"outstanding merge conflicts"),
                     hint=_(b"use 'hg resolve' to resolve"),
                 )
         if branchmerge:
             if pas == [p2]:
                 raise error.Abort(
                     _(
                         b"merging with a working directory ancestor"
                         b" has no effect"
                     )
                 )
             elif pas == [p1]:
                 if not mergeancestor and wc.branch() == p2.branch():
                     raise error.Abort(
                         _(b"nothing to merge"),
                         hint=_(b"use 'hg update' or check 'hg heads'"),
                     )
             if not force and (wc.files() or wc.deleted()):
                 raise error.StateError(
                     _(b"uncommitted changes"),
                     hint=_(b"use 'hg status' to list changes"),
                 )
             if not wc.isinmemory():
                 for s in sorted(wc.substate):
                     wc.sub(s).bailifchanged()
 
         elif not overwrite:
             if p1 == p2:  # no-op update
                 # call the hooks and exit early
                 repo.hook(b'preupdate', throw=True, parent1=xp2, parent2=b'')
                 repo.hook(b'update', parent1=xp2, parent2=b'', error=0)
                 return updateresult(0, 0, 0, 0)
 
             if updatecheck == UPDATECHECK_LINEAR and pas not in (
                 [p1],
                 [p2],
             ):  # nonlinear
                 dirty = wc.dirty(missing=True)
                 if dirty:
                     # Branching is a bit strange to ensure we do the minimal
                     # amount of call to obsutil.foreground.
                     foreground = obsutil.foreground(repo, [p1.node()])
                     # note: the <node> variable contains a random identifier
                     if repo[node].node() in foreground:
                         pass  # allow updating to successors
                     else:
                         msg = _(b"uncommitted changes")
                         hint = _(b"commit or update --clean to discard changes")
                         raise error.UpdateAbort(msg, hint=hint)
                 else:
                     # Allow jumping branches if clean and specific rev given
                     pass
 
         if overwrite:
             pas = [wc]
         elif not branchmerge:
             pas = [p1]
 
         # deprecated config: merge.followcopies
         followcopies = repo.ui.configbool(b'merge', b'followcopies')
         if overwrite:
             followcopies = False
         elif not pas[0]:
             followcopies = False
         if not branchmerge and not wc.dirty(missing=True):
             followcopies = False
 
         ### calculate phase
         mresult = calculateupdates(
             repo,
             wc,
             p2,
             pas,
             branchmerge,
             force,
             mergeancestor,
             followcopies,
             matcher=matcher,
             mergeforce=mergeforce,
         )
 
         if updatecheck == UPDATECHECK_NO_CONFLICT:
             if mresult.hasconflicts():
                 msg = _(b"conflicting changes")
                 hint = _(b"commit or update --clean to discard changes")
                 raise error.StateError(msg, hint=hint)
 
         # Prompt and create actions. Most of this is in the resolve phase
         # already, but we can't handle .hgsubstate in filemerge or
         # subrepoutil.submerge yet so we have to keep prompting for it.
         vals = mresult.getfile(b'.hgsubstate')
         if vals:
             f = b'.hgsubstate'
             m, args, msg = vals
             prompts = filemerge.partextras(labels)
             prompts[b'f'] = f
             if m == mergestatemod.ACTION_CHANGED_DELETED:
                 if repo.ui.promptchoice(
                     _(
                         b"local%(l)s changed %(f)s which other%(o)s deleted\n"
                         b"use (c)hanged version or (d)elete?"
                         b"$$ &Changed $$ &Delete"
                     )
                     % prompts,
                     0,
                 ):
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_REMOVE,
                         None,
                         b'prompt delete',
                     )
                 elif f in p1:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_ADD_MODIFIED,
                         None,
                         b'prompt keep',
                     )
                 else:
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_ADD,
                         None,
                         b'prompt keep',
                     )
             elif m == mergestatemod.ACTION_DELETED_CHANGED:
                 f1, f2, fa, move, anc = args
                 flags = p2[f2].flags()
                 if (
                     repo.ui.promptchoice(
                         _(
                             b"other%(o)s changed %(f)s which local%(l)s deleted\n"
                             b"use (c)hanged version or leave (d)eleted?"
                             b"$$ &Changed $$ &Deleted"
                         )
                         % prompts,
                         0,
                     )
                     == 0
                 ):
                     mresult.addfile(
                         f,
                         mergestatemod.ACTION_GET,
                         (flags, False),
                         b'prompt recreating',
                     )
                 else:
                     mresult.removefile(f)
 
         if not util.fscasesensitive(repo.path):
             # check collision between files only in p2 for clean update
             if not branchmerge and (
                 force or not wc.dirty(missing=True, branch=False)
             ):
                 _checkcollision(repo, p2.manifest(), None)
             else:
                 _checkcollision(repo, wc.manifest(), mresult)
 
         # divergent renames
         for f, fl in sorted(pycompat.iteritems(mresult.diverge)):
             repo.ui.warn(
                 _(
                     b"note: possible conflict - %s was renamed "
                     b"multiple times to:\n"
                 )
                 % f
             )
             for nf in sorted(fl):
                 repo.ui.warn(b" %s\n" % nf)
 
         # rename and delete
         for f, fl in sorted(pycompat.iteritems(mresult.renamedelete)):
             repo.ui.warn(
                 _(
                     b"note: possible conflict - %s was deleted "
                     b"and renamed to:\n"
                 )
                 % f
             )
             for nf in sorted(fl):
                 repo.ui.warn(b" %s\n" % nf)
 
         ### apply phase
         if not branchmerge:  # just jump to the new rev
             fp1, fp2, xp1, xp2 = fp2, repo.nullid, xp2, b''
         # If we're doing a partial update, we need to skip updating
         # the dirstate.
         always = matcher is None or matcher.always()
         updatedirstate = updatedirstate and always and not wc.isinmemory()
         if updatedirstate:
             repo.hook(b'preupdate', throw=True, parent1=xp1, parent2=xp2)
             # note that we're in the middle of an update
             repo.vfs.write(b'updatestate', p2.hex())
 
         _advertisefsmonitor(
             repo, mresult.len((mergestatemod.ACTION_GET,)), p1.node()
         )
 
         wantfiledata = updatedirstate and not branchmerge
         stats, getfiledata, extraactions = applyupdates(
             repo,
             mresult,
             wc,
             p2,
             overwrite,
             wantfiledata,
             labels=labels,
         )
 
         if updatedirstate:
             if extraactions:
                 for k, acts in pycompat.iteritems(extraactions):
                     for a in acts:
                         mresult.addfile(a[0], k, *a[1:])
                     if k == mergestatemod.ACTION_GET and wantfiledata:
                         # no filedata until mergestate is updated to provide it
                         for a in acts:
                             getfiledata[a[0]] = None
 
             assert len(getfiledata) == (
                 mresult.len((mergestatemod.ACTION_GET,)) if wantfiledata else 0
             )
             with repo.dirstate.parentchange():
                 ### Filter Filedata
                 #
                 # We gathered "cache" information for the clean file while
                 # updating them: mtime, size and mode.
                 #
                 # At the time this comment is written, they are various issues
                 # with how we gather the `mode` and `mtime` information (see
                 # the comment in `batchget`).
                 #
                 # We are going to smooth one of this issue here : mtime ambiguity.
                 #
                 # i.e. even if the mtime gathered during `batchget` was
                 # correct[1] a change happening right after it could change the
                 # content while keeping the same mtime[2].
                 #
                 # When we reach the current code, the "on disk" part of the
                 # update operation is finished. We still assume that no other
                 # process raced that "on disk" part, but we want to at least
                 # prevent later file change to alter the content of the file
                 # right after the update operation. So quickly that the same
                 # mtime is record for the operation.
                 # To prevent such ambiguity to happens, we will only keep the
                 # "file data" for files with mtime that are stricly in the past,
                 # i.e. whose mtime is strictly lower than the current time.
                 #
                 # This protect us from race conditions from operation that could
                 # run right after this one, especially other Mercurial
                 # operation that could be waiting for the wlock to touch files
                 # content and the dirstate.
                 #
                 # In an ideal world, we could only get reliable information in
                 # `getfiledata` (from `getbatch`), however the current approach
                 # have been a successful compromise since many years.
                 #
                 # At the time this comment is written, not using any "cache"
                 # file data at all here would not be viable. As it would result is
                 # a very large amount of work (equivalent to the previous `hg
                 # update` during the next status after an update).
                 #
                 # [1] the current code cannot grantee that the `mtime` and
                 # `mode` are correct, but the result is "okay in practice".
                 # (see the comment in `batchget`).                #
                 #
                 # [2] using nano-second precision can greatly help here because
                 # it makes the "different write with same mtime" issue
                 # virtually vanish. However, dirstate v1 cannot store such
                 # precision and a bunch of python-runtime, operating-system and
                 # filesystem does not provide use with such precision, so we
                 # have to operate as if it wasn't available.
                 if getfiledata:
                     ambiguous_mtime = {}
                     now = timestamp.get_fs_now(repo.vfs)
                     if now is None:
                         # we can't write to the FS, so we won't actually update
                         # the dirstate content anyway, no need to put cache
                         # information.
                         getfiledata = None
                     else:
                         now_sec = now[0]
                         for f, m in pycompat.iteritems(getfiledata):
                             if m is not None and m[2][0] >= now_sec:
                                 ambiguous_mtime[f] = (m[0], m[1], None)
                         for f, m in pycompat.iteritems(ambiguous_mtime):
                             getfiledata[f] = m
 
                 repo.setparents(fp1, fp2)
                 mergestatemod.recordupdates(
                     repo, mresult.actionsdict, branchmerge, getfiledata
                 )
                 # update completed, clear state
                 util.unlink(repo.vfs.join(b'updatestate'))
 
                 if not branchmerge:
                     repo.dirstate.setbranch(p2.branch())
 
                 # If we're updating to a location, clean up any stale temporary includes
                 # (ex: this happens during hg rebase --abort).
                 if not branchmerge:
                     sparse.prunetemporaryincludes(repo)
 
     if updatedirstate:
         repo.hook(
             b'update', parent1=xp1, parent2=xp2, error=stats.unresolvedcount
         )
     return stats
 
 
 def merge(ctx, labels=None, force=False, wc=None):
     """Merge another topological branch into the working copy.
 
     force = whether the merge was run with 'merge --force' (deprecated)
     """
 
     return _update(
         ctx.repo(),
         ctx.rev(),
         labels=labels,
         branchmerge=True,
         force=force,
         mergeforce=force,
         wc=wc,
     )
 
 
 def update(ctx, updatecheck=None, wc=None):
     """Do a regular update to the given commit, aborting if there are conflicts.
 
     The 'updatecheck' argument can be used to control what to do in case of
     conflicts.
 
     Note: This is a new, higher-level update() than the one that used to exist
     in this module. That function is now called _update(). You can hopefully
     replace your callers to use this new update(), or clean_update(), merge(),
     revert_to(), or graft().
     """
     return _update(
         ctx.repo(),
         ctx.rev(),
         branchmerge=False,
         force=False,
         labels=[b'working copy', b'destination'],
         updatecheck=updatecheck,
         wc=wc,
     )
 
 
 def clean_update(ctx, wc=None):
     """Do a clean update to the given commit.
 
     This involves updating to the commit and discarding any changes in the
     working copy.
     """
     return _update(ctx.repo(), ctx.rev(), branchmerge=False, force=True, wc=wc)
 
 
 def revert_to(ctx, matcher=None, wc=None):
     """Revert the working copy to the given commit.
 
     The working copy will keep its current parent(s) but its content will
     be the same as in the given commit.
     """
 
     return _update(
         ctx.repo(),
         ctx.rev(),
         branchmerge=False,
         force=True,
         updatedirstate=False,
         matcher=matcher,
         wc=wc,
     )
 
 
 def graft(
     repo,
     ctx,
     base=None,
     labels=None,
     keepparent=False,
     keepconflictparent=False,
     wctx=None,
 ):
     """Do a graft-like merge.
 
     This is a merge where the merge ancestor is chosen such that one
     or more changesets are grafted onto the current changeset. In
     addition to the merge, this fixes up the dirstate to include only
     a single parent (if keepparent is False) and tries to duplicate any
     renames/copies appropriately.
 
     ctx - changeset to rebase
     base - merge base, or ctx.p1() if not specified
     labels - merge labels eg ['local', 'graft']
     keepparent - keep second parent if any
     keepconflictparent - if unresolved, keep parent used for the merge
 
     """
     # If we're grafting a descendant onto an ancestor, be sure to pass
     # mergeancestor=True to update. This does two things: 1) allows the merge if
     # the destination is the same as the parent of the ctx (so we can use graft
     # to copy commits), and 2) informs update that the incoming changes are
     # newer than the destination so it doesn't prompt about "remote changed foo
     # which local deleted".
     # We also pass mergeancestor=True when base is the same revision as p1. 2)
     # doesn't matter as there can't possibly be conflicts, but 1) is necessary.
     wctx = wctx or repo[None]
     pctx = wctx.p1()
     base = base or ctx.p1()
     mergeancestor = (
         repo.changelog.isancestor(pctx.node(), ctx.node())
         or pctx.rev() == base.rev()
     )
 
     stats = _update(
         repo,
         ctx.node(),
         True,
         True,
         base.node(),
         mergeancestor=mergeancestor,
         labels=labels,
         wc=wctx,
     )
 
     if keepconflictparent and stats.unresolvedcount:
         pother = ctx.node()
     else:
         pother = repo.nullid
         parents = ctx.parents()
         if keepparent and len(parents) == 2 and base in parents:
             parents.remove(base)
             pother = parents[0].node()
     # Never set both parents equal to each other
     if pother == pctx.node():
         pother = repo.nullid
 
     if wctx.isinmemory():
         wctx.setparents(pctx.node(), pother)
         # fix up dirstate for copies and renames
         copies.graftcopies(wctx, ctx, base)
     else:
         with repo.dirstate.parentchange():
             repo.setparents(pctx.node(), pother)
             repo.dirstate.write(repo.currenttransaction())
             # fix up dirstate for copies and renames
             copies.graftcopies(wctx, ctx, base)
     return stats
 
 
 def back_out(ctx, parent=None, wc=None):
     if parent is None:
         if ctx.p2() is not None:
             raise error.ProgrammingError(
                 b"must specify parent of merge commit to back out"
             )
         parent = ctx.p1()
     return _update(
         ctx.repo(),
         parent,
         branchmerge=True,
         force=True,
         ancestor=ctx.node(),
         mergeancestor=False,
     )
 
 
 def purge(
     repo,
     matcher,
     unknown=True,
     ignored=False,
     removeemptydirs=True,
     removefiles=True,
     abortonerror=False,
     noop=False,
     confirm=False,
 ):
     """Purge the working directory of untracked files.
 
     ``matcher`` is a matcher configured to scan the working directory -
     potentially a subset.
 
     ``unknown`` controls whether unknown files should be purged.
 
     ``ignored`` controls whether ignored files should be purged.
 
     ``removeemptydirs`` controls whether empty directories should be removed.
 
     ``removefiles`` controls whether files are removed.
 
     ``abortonerror`` causes an exception to be raised if an error occurs
     deleting a file or directory.
 
     ``noop`` controls whether to actually remove files. If not defined, actions
     will be taken.
 
     ``confirm`` ask confirmation before actually removing anything.
 
     Returns an iterable of relative paths in the working directory that were
     or would be removed.
     """
 
     def remove(removefn, path):
         try:
             removefn(path)
         except OSError:
             m = _(b'%s cannot be removed') % path
             if abortonerror:
                 raise error.Abort(m)
             else:
                 repo.ui.warn(_(b'warning: %s\n') % m)
 
     # There's no API to copy a matcher. So mutate the passed matcher and
     # restore it when we're done.
     oldtraversedir = matcher.traversedir
 
     res = []
 
     try:
         if removeemptydirs:
             directories = []
             matcher.traversedir = directories.append
 
         status = repo.status(match=matcher, ignored=ignored, unknown=unknown)
 
         if confirm:
             nb_ignored = len(status.ignored)
             nb_unknown = len(status.unknown)
             if nb_unknown and nb_ignored:
                 msg = _(b"permanently delete %d unknown and %d ignored files?")
                 msg %= (nb_unknown, nb_ignored)
             elif nb_unknown:
                 msg = _(b"permanently delete %d unknown files?")
                 msg %= nb_unknown
             elif nb_ignored:
                 msg = _(b"permanently delete %d ignored files?")
                 msg %= nb_ignored
             elif removeemptydirs:
                 dir_count = 0
                 for f in directories:
                     if matcher(f) and not repo.wvfs.listdir(f):
                         dir_count += 1
                 if dir_count:
                     msg = _(
                         b"permanently delete at least %d empty directories?"
                     )
                     msg %= dir_count
                 else:
                     # XXX we might be missing directory there
                     return res
             msg += b" (yN)$$ &Yes $$ &No"
             if repo.ui.promptchoice(msg, default=1) == 1:
                 raise error.CanceledError(_(b'removal cancelled'))
 
         if removefiles:
             for f in sorted(status.unknown + status.ignored):
                 if not noop:
                     repo.ui.note(_(b'removing file %s\n') % f)
                     remove(repo.wvfs.unlink, f)
                 res.append(f)
 
         if removeemptydirs:
             for f in sorted(directories, reverse=True):
                 if matcher(f) and not repo.wvfs.listdir(f):
                     if not noop:
                         repo.ui.note(_(b'removing directory %s\n') % f)
                         remove(repo.wvfs.rmdir, f)
                     res.append(f)
 
         return res
 
     finally:
         matcher.traversedir = oldtraversedir

mercurial/mergestate.py

@@ -1,871 +1,868 b''
 from __future__ import absolute_import
 
 import collections
 import errno
 import shutil
 import struct
 
 from .i18n import _
 from .node import (
     bin,
     hex,
     nullrev,
 )
 from . import (
     error,
     filemerge,
     pycompat,
     util,
 )
 from .utils import hashutil
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 
 def _droponode(data):
     # used for compatibility for v1
     bits = data.split(b'\0')
     bits = bits[:-2] + bits[-1:]
     return b'\0'.join(bits)
 
 
 def _filectxorabsent(hexnode, ctx, f):
     if hexnode == ctx.repo().nodeconstants.nullhex:
         return filemerge.absentfilectx(ctx, f)
     else:
         return ctx[f]
 
 
 # Merge state record types. See ``mergestate`` docs for more.
 
 ####
 # merge records which records metadata about a current merge
 # exists only once in a mergestate
 #####
 RECORD_LOCAL = b'L'
 RECORD_OTHER = b'O'
 # record merge labels
 RECORD_LABELS = b'l'
 
 #####
 # record extra information about files, with one entry containing info about one
 # file. Hence, multiple of them can exists
 #####
 RECORD_FILE_VALUES = b'f'
 
 #####
 # merge records which represents state of individual merges of files/folders
 # These are top level records for each entry containing merge related info.
 # Each record of these has info about one file. Hence multiple of them can
 # exists
 #####
 RECORD_MERGED = b'F'
 RECORD_CHANGEDELETE_CONFLICT = b'C'
 # the path was dir on one side of merge and file on another
 RECORD_PATH_CONFLICT = b'P'
 
 #####
 # possible state which a merge entry can have. These are stored inside top-level
 # merge records mentioned just above.
 #####
 MERGE_RECORD_UNRESOLVED = b'u'
 MERGE_RECORD_RESOLVED = b'r'
 MERGE_RECORD_UNRESOLVED_PATH = b'pu'
 MERGE_RECORD_RESOLVED_PATH = b'pr'
 # represents that the file was automatically merged in favor
 # of other version. This info is used on commit.
 # This is now deprecated and commit related information is now
 # stored in RECORD_FILE_VALUES
 MERGE_RECORD_MERGED_OTHER = b'o'
 
 #####
 # top level record which stores other unknown records. Multiple of these can
 # exists
 #####
 RECORD_OVERRIDE = b't'
 
 #####
 # legacy records which are no longer used but kept to prevent breaking BC
 #####
 # This record was release in 5.4 and usage was removed in 5.5
 LEGACY_RECORD_RESOLVED_OTHER = b'R'
 # This record was release in 3.7 and usage was removed in 5.6
 LEGACY_RECORD_DRIVER_RESOLVED = b'd'
 # This record was release in 3.7 and usage was removed in 5.6
 LEGACY_MERGE_DRIVER_STATE = b'm'
 # This record was release in 3.7 and usage was removed in 5.6
 LEGACY_MERGE_DRIVER_MERGE = b'D'
 
 
 ACTION_FORGET = b'f'
 ACTION_REMOVE = b'r'
 ACTION_ADD = b'a'
 ACTION_GET = b'g'
 ACTION_PATH_CONFLICT = b'p'
 ACTION_PATH_CONFLICT_RESOLVE = b'pr'
 ACTION_ADD_MODIFIED = b'am'
 ACTION_CREATED = b'c'
 ACTION_DELETED_CHANGED = b'dc'
 ACTION_CHANGED_DELETED = b'cd'
 ACTION_MERGE = b'm'
 ACTION_LOCAL_DIR_RENAME_GET = b'dg'
 ACTION_DIR_RENAME_MOVE_LOCAL = b'dm'
 ACTION_KEEP = b'k'
 # the file was absent on local side before merge and we should
 # keep it absent (absent means file not present, it can be a result
 # of file deletion, rename etc.)
 ACTION_KEEP_ABSENT = b'ka'
 # the file is absent on the ancestor and remote side of the merge
 # hence this file is new and we should keep it
 ACTION_KEEP_NEW = b'kn'
 ACTION_EXEC = b'e'
 ACTION_CREATED_MERGE = b'cm'
 
 # actions which are no op
 NO_OP_ACTIONS = (
     ACTION_KEEP,
     ACTION_KEEP_ABSENT,
     ACTION_KEEP_NEW,
 )
 
 
 class _mergestate_base(object):
     """track 3-way merge state of individual files
 
     The merge state is stored on disk when needed. Two files are used: one with
     an old format (version 1), and one with a new format (version 2). Version 2
     stores a superset of the data in version 1, including new kinds of records
     in the future. For more about the new format, see the documentation for
     `_readrecordsv2`.
 
     Each record can contain arbitrary content, and has an associated type. This
     `type` should be a letter. If `type` is uppercase, the record is mandatory:
     versions of Mercurial that don't support it should abort. If `type` is
     lowercase, the record can be safely ignored.
 
     Currently known records:
 
     L: the node of the "local" part of the merge (hexified version)
     O: the node of the "other" part of the merge (hexified version)
     F: a file to be merged entry
     C: a change/delete or delete/change conflict
     P: a path conflict (file vs directory)
     f: a (filename, dictionary) tuple of optional values for a given file
     l: the labels for the parts of the merge.
 
     Merge record states (stored in self._state, indexed by filename):
     u: unresolved conflict
     r: resolved conflict
     pu: unresolved path conflict (file conflicts with directory)
     pr: resolved path conflict
     o: file was merged in favor of other parent of merge (DEPRECATED)
 
     The resolve command transitions between 'u' and 'r' for conflicts and
     'pu' and 'pr' for path conflicts.
     """
 
     def __init__(self, repo):
         """Initialize the merge state.
 
         Do not use this directly! Instead call read() or clean()."""
         self._repo = repo
         self._state = {}
         self._stateextras = collections.defaultdict(dict)
         self._local = None
         self._other = None
         self._labels = None
         # contains a mapping of form:
         # {filename : (merge_return_value, action_to_be_performed}
         # these are results of re-running merge process
         # this dict is used to perform actions on dirstate caused by re-running
         # the merge
         self._results = {}
         self._dirty = False
 
     def reset(self):
         pass
 
     def start(self, node, other, labels=None):
         self._local = node
         self._other = other
         self._labels = labels
 
     @util.propertycache
     def local(self):
         if self._local is None:
             msg = b"local accessed but self._local isn't set"
             raise error.ProgrammingError(msg)
         return self._local
 
     @util.propertycache
     def localctx(self):
         return self._repo[self.local]
 
     @util.propertycache
     def other(self):
         if self._other is None:
             msg = b"other accessed but self._other isn't set"
             raise error.ProgrammingError(msg)
         return self._other
 
     @util.propertycache
     def otherctx(self):
         return self._repo[self.other]
 
     def active(self):
         """Whether mergestate is active.
 
         Returns True if there appears to be mergestate. This is a rough proxy
         for "is a merge in progress."
         """
         return bool(self._local) or bool(self._state)
 
     def commit(self):
         """Write current state on disk (if necessary)"""
 
     @staticmethod
     def getlocalkey(path):
         """hash the path of a local file context for storage in the .hg/merge
         directory."""
 
         return hex(hashutil.sha1(path).digest())
 
     def _make_backup(self, fctx, localkey):
         raise NotImplementedError()
 
     def _restore_backup(self, fctx, localkey, flags):
         raise NotImplementedError()
 
     def add(self, fcl, fco, fca, fd):
         """add a new (potentially?) conflicting file the merge state
         fcl: file context for local,
         fco: file context for remote,
         fca: file context for ancestors,
         fd:  file path of the resulting merge.
 
         note: also write the local version to the `.hg/merge` directory.
         """
         if fcl.isabsent():
             localkey = self._repo.nodeconstants.nullhex
         else:
             localkey = mergestate.getlocalkey(fcl.path())
             self._make_backup(fcl, localkey)
         self._state[fd] = [
             MERGE_RECORD_UNRESOLVED,
             localkey,
             fcl.path(),
             fca.path(),
             hex(fca.filenode()),
             fco.path(),
             hex(fco.filenode()),
             fcl.flags(),
         ]
         self._stateextras[fd][b'ancestorlinknode'] = hex(fca.node())
         self._dirty = True
 
     def addpathconflict(self, path, frename, forigin):
         """add a new conflicting path to the merge state
         path:    the path that conflicts
         frename: the filename the conflicting file was renamed to
         forigin: origin of the file ('l' or 'r' for local/remote)
         """
         self._state[path] = [MERGE_RECORD_UNRESOLVED_PATH, frename, forigin]
         self._dirty = True
 
     def addcommitinfo(self, path, data):
         """stores information which is required at commit
         into _stateextras"""
         self._stateextras[path].update(data)
         self._dirty = True
 
     def __contains__(self, dfile):
         return dfile in self._state
 
     def __getitem__(self, dfile):
         return self._state[dfile][0]
 
     def __iter__(self):
         return iter(sorted(self._state))
 
     def files(self):
         return self._state.keys()
 
     def mark(self, dfile, state):
         self._state[dfile][0] = state
         self._dirty = True
 
     def unresolved(self):
         """Obtain the paths of unresolved files."""
 
         for f, entry in pycompat.iteritems(self._state):
             if entry[0] in (
                 MERGE_RECORD_UNRESOLVED,
                 MERGE_RECORD_UNRESOLVED_PATH,
             ):
                 yield f
 
     def allextras(self):
         """return all extras information stored with the mergestate"""
         return self._stateextras
 
     def extras(self, filename):
         """return extras stored with the mergestate for the given filename"""
         return self._stateextras[filename]
 
     def _resolve(self, preresolve, dfile, wctx):
         """rerun merge process for file path `dfile`.
         Returns whether the merge was completed and the return value of merge
         obtained from filemerge._filemerge().
         """
         if self[dfile] in (
             MERGE_RECORD_RESOLVED,
             LEGACY_RECORD_DRIVER_RESOLVED,
         ):
             return True, 0
         stateentry = self._state[dfile]
         state, localkey, lfile, afile, anode, ofile, onode, flags = stateentry
         octx = self._repo[self._other]
         extras = self.extras(dfile)
         anccommitnode = extras.get(b'ancestorlinknode')
         if anccommitnode:
             actx = self._repo[anccommitnode]
         else:
             actx = None
         fcd = _filectxorabsent(localkey, wctx, dfile)
         fco = _filectxorabsent(onode, octx, ofile)
         # TODO: move this to filectxorabsent
         fca = self._repo.filectx(afile, fileid=anode, changectx=actx)
         # "premerge" x flags
         flo = fco.flags()
         fla = fca.flags()
         if b'x' in flags + flo + fla and b'l' not in flags + flo + fla:
             if fca.rev() == nullrev and flags != flo:
                 if preresolve:
                     self._repo.ui.warn(
                         _(
                             b'warning: cannot merge flags for %s '
                             b'without common ancestor - keeping local flags\n'
                         )
                         % afile
                     )
             elif flags == fla:
                 flags = flo
         if preresolve:
             # restore local
             if localkey != self._repo.nodeconstants.nullhex:
                 self._restore_backup(wctx[dfile], localkey, flags)
             else:
                 wctx[dfile].remove(ignoremissing=True)
             complete, merge_ret, deleted = filemerge.premerge(
                 self._repo,
                 wctx,
                 self._local,
                 lfile,
                 fcd,
                 fco,
                 fca,
                 labels=self._labels,
             )
         else:
             complete, merge_ret, deleted = filemerge.filemerge(
                 self._repo,
                 wctx,
                 self._local,
                 lfile,
                 fcd,
                 fco,
                 fca,
                 labels=self._labels,
             )
         if merge_ret is None:
             # If return value of merge is None, then there are no real conflict
             del self._state[dfile]
             self._dirty = True
         elif not merge_ret:
             self.mark(dfile, MERGE_RECORD_RESOLVED)
 
         if complete:
             action = None
             if deleted:
                 if fcd.isabsent():
                     # dc: local picked. Need to drop if present, which may
                     # happen on re-resolves.
                     action = ACTION_FORGET
                 else:
                     # cd: remote picked (or otherwise deleted)
                     action = ACTION_REMOVE
             else:
                 if fcd.isabsent():  # dc: remote picked
                     action = ACTION_GET
                 elif fco.isabsent():  # cd: local picked
                     if dfile in self.localctx:
                         action = ACTION_ADD_MODIFIED
                     else:
                         action = ACTION_ADD
                 # else: regular merges (no action necessary)
             self._results[dfile] = merge_ret, action
 
         return complete, merge_ret
 
-    def preresolve(self, dfile, wctx):
-        """run premerge process for dfile
-
-        Returns whether the merge is complete, and the exit code."""
-        return self._resolve(True, dfile, wctx)
-
     def resolve(self, dfile, wctx):
-        """run merge process (assuming premerge was run) for dfile
+        """run merge process for dfile
 
         Returns the exit code of the merge."""
-        return self._resolve(False, dfile, wctx)[1]
+        complete, r = self._resolve(True, dfile, wctx)
+        if not complete:
+            r = self._resolve(False, dfile, wctx)[1]
+        return r
 
     def counts(self):
         """return counts for updated, merged and removed files in this
         session"""
         updated, merged, removed = 0, 0, 0
         for r, action in pycompat.itervalues(self._results):
             if r is None:
                 updated += 1
             elif r == 0:
                 if action == ACTION_REMOVE:
                     removed += 1
                 else:
                     merged += 1
         return updated, merged, removed
 
     def unresolvedcount(self):
         """get unresolved count for this merge (persistent)"""
         return len(list(self.unresolved()))
 
     def actions(self):
         """return lists of actions to perform on the dirstate"""
         actions = {
             ACTION_REMOVE: [],
             ACTION_FORGET: [],
             ACTION_ADD: [],
             ACTION_ADD_MODIFIED: [],
             ACTION_GET: [],
         }
         for f, (r, action) in pycompat.iteritems(self._results):
             if action is not None:
                 actions[action].append((f, None, b"merge result"))
         return actions
 
 
 class mergestate(_mergestate_base):
 
     statepathv1 = b'merge/state'
     statepathv2 = b'merge/state2'
 
     @staticmethod
     def clean(repo):
         """Initialize a brand new merge state, removing any existing state on
         disk."""
         ms = mergestate(repo)
         ms.reset()
         return ms
 
     @staticmethod
     def read(repo):
         """Initialize the merge state, reading it from disk."""
         ms = mergestate(repo)
         ms._read()
         return ms
 
     def _read(self):
         """Analyse each record content to restore a serialized state from disk
 
         This function process "record" entry produced by the de-serialization
         of on disk file.
         """
         unsupported = set()
         records = self._readrecords()
         for rtype, record in records:
             if rtype == RECORD_LOCAL:
                 self._local = bin(record)
             elif rtype == RECORD_OTHER:
                 self._other = bin(record)
             elif rtype == LEGACY_MERGE_DRIVER_STATE:
                 pass
             elif rtype in (
                 RECORD_MERGED,
                 RECORD_CHANGEDELETE_CONFLICT,
                 RECORD_PATH_CONFLICT,
                 LEGACY_MERGE_DRIVER_MERGE,
                 LEGACY_RECORD_RESOLVED_OTHER,
             ):
                 bits = record.split(b'\0')
                 # merge entry type MERGE_RECORD_MERGED_OTHER is deprecated
                 # and we now store related information in _stateextras, so
                 # lets write to _stateextras directly
                 if bits[1] == MERGE_RECORD_MERGED_OTHER:
                     self._stateextras[bits[0]][b'filenode-source'] = b'other'
                 else:
                     self._state[bits[0]] = bits[1:]
             elif rtype == RECORD_FILE_VALUES:
                 filename, rawextras = record.split(b'\0', 1)
                 extraparts = rawextras.split(b'\0')
                 extras = {}
                 i = 0
                 while i < len(extraparts):
                     extras[extraparts[i]] = extraparts[i + 1]
                     i += 2
 
                 self._stateextras[filename] = extras
             elif rtype == RECORD_LABELS:
                 labels = record.split(b'\0', 2)
                 self._labels = [l for l in labels if len(l) > 0]
             elif not rtype.islower():
                 unsupported.add(rtype)
 
         if unsupported:
             raise error.UnsupportedMergeRecords(unsupported)
 
     def _readrecords(self):
         """Read merge state from disk and return a list of record (TYPE, data)
 
         We read data from both v1 and v2 files and decide which one to use.
 
         V1 has been used by version prior to 2.9.1 and contains less data than
         v2. We read both versions and check if no data in v2 contradicts
         v1. If there is not contradiction we can safely assume that both v1
         and v2 were written at the same time and use the extract data in v2. If
         there is contradiction we ignore v2 content as we assume an old version
         of Mercurial has overwritten the mergestate file and left an old v2
         file around.
 
         returns list of record [(TYPE, data), ...]"""
         v1records = self._readrecordsv1()
         v2records = self._readrecordsv2()
         if self._v1v2match(v1records, v2records):
             return v2records
         else:
             # v1 file is newer than v2 file, use it
             # we have to infer the "other" changeset of the merge
             # we cannot do better than that with v1 of the format
             mctx = self._repo[None].parents()[-1]
             v1records.append((RECORD_OTHER, mctx.hex()))
             # add place holder "other" file node information
             # nobody is using it yet so we do no need to fetch the data
             # if mctx was wrong `mctx[bits[-2]]` may fails.
             for idx, r in enumerate(v1records):
                 if r[0] == RECORD_MERGED:
                     bits = r[1].split(b'\0')
                     bits.insert(-2, b'')
                     v1records[idx] = (r[0], b'\0'.join(bits))
             return v1records
 
     def _v1v2match(self, v1records, v2records):
         oldv2 = set()  # old format version of v2 record
         for rec in v2records:
             if rec[0] == RECORD_LOCAL:
                 oldv2.add(rec)
             elif rec[0] == RECORD_MERGED:
                 # drop the onode data (not contained in v1)
                 oldv2.add((RECORD_MERGED, _droponode(rec[1])))
         for rec in v1records:
             if rec not in oldv2:
                 return False
         else:
             return True
 
     def _readrecordsv1(self):
         """read on disk merge state for version 1 file
 
         returns list of record [(TYPE, data), ...]
 
         Note: the "F" data from this file are one entry short
               (no "other file node" entry)
         """
         records = []
         try:
             f = self._repo.vfs(self.statepathv1)
             for i, l in enumerate(f):
                 if i == 0:
                     records.append((RECORD_LOCAL, l[:-1]))
                 else:
                     records.append((RECORD_MERGED, l[:-1]))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def _readrecordsv2(self):
         """read on disk merge state for version 2 file
 
         This format is a list of arbitrary records of the form:
 
           [type][length][content]
 
         `type` is a single character, `length` is a 4 byte integer, and
         `content` is an arbitrary byte sequence of length `length`.
 
         Mercurial versions prior to 3.7 have a bug where if there are
         unsupported mandatory merge records, attempting to clear out the merge
         state with hg update --clean or similar aborts. The 't' record type
         works around that by writing out what those versions treat as an
         advisory record, but later versions interpret as special: the first
         character is the 'real' record type and everything onwards is the data.
 
         Returns list of records [(TYPE, data), ...]."""
         records = []
         try:
             f = self._repo.vfs(self.statepathv2)
             data = f.read()
             off = 0
             end = len(data)
             while off < end:
                 rtype = data[off : off + 1]
                 off += 1
                 length = _unpack(b'>I', data[off : (off + 4)])[0]
                 off += 4
                 record = data[off : (off + length)]
                 off += length
                 if rtype == RECORD_OVERRIDE:
                     rtype, record = record[0:1], record[1:]
                 records.append((rtype, record))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def commit(self):
         if self._dirty:
             records = self._makerecords()
             self._writerecords(records)
             self._dirty = False
 
     def _makerecords(self):
         records = []
         records.append((RECORD_LOCAL, hex(self._local)))
         records.append((RECORD_OTHER, hex(self._other)))
         # Write out state items. In all cases, the value of the state map entry
         # is written as the contents of the record. The record type depends on
         # the type of state that is stored, and capital-letter records are used
         # to prevent older versions of Mercurial that do not support the feature
         # from loading them.
         for filename, v in pycompat.iteritems(self._state):
             if v[0] in (
                 MERGE_RECORD_UNRESOLVED_PATH,
                 MERGE_RECORD_RESOLVED_PATH,
             ):
                 # Path conflicts. These are stored in 'P' records.  The current
                 # resolution state ('pu' or 'pr') is stored within the record.
                 records.append(
                     (RECORD_PATH_CONFLICT, b'\0'.join([filename] + v))
                 )
             elif (
                 v[1] == self._repo.nodeconstants.nullhex
                 or v[6] == self._repo.nodeconstants.nullhex
             ):
                 # Change/Delete or Delete/Change conflicts. These are stored in
                 # 'C' records. v[1] is the local file, and is nullhex when the
                 # file is deleted locally ('dc'). v[6] is the remote file, and
                 # is nullhex when the file is deleted remotely ('cd').
                 records.append(
                     (RECORD_CHANGEDELETE_CONFLICT, b'\0'.join([filename] + v))
                 )
             else:
                 # Normal files.  These are stored in 'F' records.
                 records.append((RECORD_MERGED, b'\0'.join([filename] + v)))
         for filename, extras in sorted(pycompat.iteritems(self._stateextras)):
             rawextras = b'\0'.join(
                 b'%s\0%s' % (k, v) for k, v in pycompat.iteritems(extras)
             )
             records.append(
                 (RECORD_FILE_VALUES, b'%s\0%s' % (filename, rawextras))
             )
         if self._labels is not None:
             labels = b'\0'.join(self._labels)
             records.append((RECORD_LABELS, labels))
         return records
 
     def _writerecords(self, records):
         """Write current state on disk (both v1 and v2)"""
         self._writerecordsv1(records)
         self._writerecordsv2(records)
 
     def _writerecordsv1(self, records):
         """Write current state on disk in a version 1 file"""
         f = self._repo.vfs(self.statepathv1, b'wb')
         irecords = iter(records)
         lrecords = next(irecords)
         assert lrecords[0] == RECORD_LOCAL
         f.write(hex(self._local) + b'\n')
         for rtype, data in irecords:
             if rtype == RECORD_MERGED:
                 f.write(b'%s\n' % _droponode(data))
         f.close()
 
     def _writerecordsv2(self, records):
         """Write current state on disk in a version 2 file
 
         See the docstring for _readrecordsv2 for why we use 't'."""
         # these are the records that all version 2 clients can read
         allowlist = (RECORD_LOCAL, RECORD_OTHER, RECORD_MERGED)
         f = self._repo.vfs(self.statepathv2, b'wb')
         for key, data in records:
             assert len(key) == 1
             if key not in allowlist:
                 key, data = RECORD_OVERRIDE, b'%s%s' % (key, data)
             format = b'>sI%is' % len(data)
             f.write(_pack(format, key, len(data), data))
         f.close()
 
     def _make_backup(self, fctx, localkey):
         self._repo.vfs.write(b'merge/' + localkey, fctx.data())
 
     def _restore_backup(self, fctx, localkey, flags):
         with self._repo.vfs(b'merge/' + localkey) as f:
             fctx.write(f.read(), flags)
 
     def reset(self):
         shutil.rmtree(self._repo.vfs.join(b'merge'), True)
 
 
 class memmergestate(_mergestate_base):
     def __init__(self, repo):
         super(memmergestate, self).__init__(repo)
         self._backups = {}
 
     def _make_backup(self, fctx, localkey):
         self._backups[localkey] = fctx.data()
 
     def _restore_backup(self, fctx, localkey, flags):
         fctx.write(self._backups[localkey], flags)
 
 
 def recordupdates(repo, actions, branchmerge, getfiledata):
     """record merge actions to the dirstate"""
     # remove (must come first)
     for f, args, msg in actions.get(ACTION_REMOVE, []):
         if branchmerge:
             repo.dirstate.update_file(f, p1_tracked=True, wc_tracked=False)
         else:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=False)
 
     # forget (must come first)
     for f, args, msg in actions.get(ACTION_FORGET, []):
         repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=False)
 
     # resolve path conflicts
     for f, args, msg in actions.get(ACTION_PATH_CONFLICT_RESOLVE, []):
         (f0, origf0) = args
         repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
         repo.dirstate.copy(origf0, f)
         if f0 == origf0:
             repo.dirstate.update_file(f0, p1_tracked=True, wc_tracked=False)
         else:
             repo.dirstate.update_file(f0, p1_tracked=False, wc_tracked=False)
 
     # re-add
     for f, args, msg in actions.get(ACTION_ADD, []):
         repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
 
     # re-add/mark as modified
     for f, args, msg in actions.get(ACTION_ADD_MODIFIED, []):
         if branchmerge:
             repo.dirstate.update_file(
                 f, p1_tracked=True, wc_tracked=True, possibly_dirty=True
             )
         else:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
 
     # exec change
     for f, args, msg in actions.get(ACTION_EXEC, []):
         repo.dirstate.update_file(
             f, p1_tracked=True, wc_tracked=True, possibly_dirty=True
         )
 
     # keep
     for f, args, msg in actions.get(ACTION_KEEP, []):
         pass
 
     # keep deleted
     for f, args, msg in actions.get(ACTION_KEEP_ABSENT, []):
         pass
 
     # keep new
     for f, args, msg in actions.get(ACTION_KEEP_NEW, []):
         pass
 
     # get
     for f, args, msg in actions.get(ACTION_GET, []):
         if branchmerge:
             # tracked in p1 can be True also but update_file should not care
             old_entry = repo.dirstate.get_entry(f)
             p1_tracked = old_entry.any_tracked and not old_entry.added
             repo.dirstate.update_file(
                 f,
                 p1_tracked=p1_tracked,
                 wc_tracked=True,
                 p2_info=True,
             )
         else:
             parentfiledata = getfiledata[f] if getfiledata else None
             repo.dirstate.update_file(
                 f,
                 p1_tracked=True,
                 wc_tracked=True,
                 parentfiledata=parentfiledata,
             )
 
     # merge
     for f, args, msg in actions.get(ACTION_MERGE, []):
         f1, f2, fa, move, anc = args
         if branchmerge:
             # We've done a branch merge, mark this file as merged
             # so that we properly record the merger later
             p1_tracked = f1 == f
             repo.dirstate.update_file(
                 f,
                 p1_tracked=p1_tracked,
                 wc_tracked=True,
                 p2_info=True,
             )
             if f1 != f2:  # copy/rename
                 if move:
                     repo.dirstate.update_file(
                         f1, p1_tracked=True, wc_tracked=False
                     )
                 if f1 != f:
                     repo.dirstate.copy(f1, f)
                 else:
                     repo.dirstate.copy(f2, f)
         else:
             # We've update-merged a locally modified file, so
             # we set the dirstate to emulate a normal checkout
             # of that file some time in the past. Thus our
             # merge will appear as a normal local file
             # modification.
             if f2 == f:  # file not locally copied/moved
                 repo.dirstate.update_file(
                     f, p1_tracked=True, wc_tracked=True, possibly_dirty=True
                 )
             if move:
                 repo.dirstate.update_file(
                     f1, p1_tracked=False, wc_tracked=False
                 )
 
     # directory rename, move local
     for f, args, msg in actions.get(ACTION_DIR_RENAME_MOVE_LOCAL, []):
         f0, flag = args
         if branchmerge:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
             repo.dirstate.update_file(f0, p1_tracked=True, wc_tracked=False)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.update_file(f, p1_tracked=True, wc_tracked=True)
             repo.dirstate.update_file(f0, p1_tracked=False, wc_tracked=False)
 
     # directory rename, get
     for f, args, msg in actions.get(ACTION_LOCAL_DIR_RENAME_GET, []):
         f0, flag = args
         if branchmerge:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.update_file(f, p1_tracked=True, wc_tracked=True)

tests/test-copy-move-merge.t

@@ -1,255 +1,255 b''
 Test for the full copytracing algorithm
 =======================================
 
 
 Initial Setup
 =============
 
 use git diff to see rename
 
   $ cat << EOF >> $HGRCPATH
   > [diff]
   > git=yes
   > EOF
 
 Setup an history where one side copy and rename a file (and update it) while the other side update it.
 
   $ hg init t
   $ cd t
 
   $ echo 1 > a
   $ hg ci -qAm "first"
 
   $ hg cp a b
   $ hg mv a c
   $ echo 2 >> b
   $ echo 2 >> c
 
   $ hg ci -qAm "second"
 
   $ hg co -C 0
   1 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
   $ echo 0 > a
   $ echo 1 >> a
 
   $ hg ci -qAm "other"
 
   $ hg log -G --patch
   @  changeset:   2:add3f11052fa
   |  tag:         tip
   |  parent:      0:b8bf91eeebbc
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     other
   |
   |  diff --git a/a b/a
   |  --- a/a
   |  +++ b/a
   |  @@ -1,1 +1,2 @@
   |  +0
   |   1
   |
   | o  changeset:   1:17c05bb7fcb6
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     second
   |
   |    diff --git a/a b/b
   |    rename from a
   |    rename to b
   |    --- a/a
   |    +++ b/b
   |    @@ -1,1 +1,2 @@
   |     1
   |    +2
   |    diff --git a/a b/c
   |    copy from a
   |    copy to c
   |    --- a/a
   |    +++ b/c
   |    @@ -1,1 +1,2 @@
   |     1
   |    +2
   |
   o  changeset:   0:b8bf91eeebbc
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     first
   
      diff --git a/a b/a
      new file mode 100644
      --- /dev/null
      +++ b/a
      @@ -0,0 +1,1 @@
      +1
   
 
 Test Simple Merge
 =================
 
   $ hg merge --debug
     unmatched files in other:
      b
      c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on remote side:
       src: 'a' -> dst: 'b' *
       src: 'a' -> dst: 'c' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: b8bf91eeebbc, local: add3f11052fa+, remote: 17c05bb7fcb6
   starting 4 threads for background file closing (?)
    preserving a for resolve of b
    preserving a for resolve of c
   removing a
-   b: remote moved from a -> m (premerge)
+   b: remote moved from a -> m
   picked tool ':merge' for b (binary False symlink False changedelete False)
   merging a and b to b
   my b@add3f11052fa+ other b@17c05bb7fcb6 ancestor a@b8bf91eeebbc
    premerge successful
-   c: remote moved from a -> m (premerge)
+   c: remote moved from a -> m
   picked tool ':merge' for c (binary False symlink False changedelete False)
   merging a and c to c
   my c@add3f11052fa+ other c@17c05bb7fcb6 ancestor a@b8bf91eeebbc
    premerge successful
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 file b
   $ cat b
   0
   1
   2
 
 file c
   $ cat c
   0
   1
   2
 
 Test disabling copy tracing
 ===========================
 
 first verify copy metadata was kept
 -----------------------------------
 
   $ hg up -qC 2
   $ hg rebase --keep -d 1 -b 2 --config extensions.rebase=
   rebasing 2:add3f11052fa tip "other"
   merging b and a to b
   merging c and a to c
 
   $ cat b
   0
   1
   2
 
  next verify copy metadata is lost when disabled
 ------------------------------------------------
 
   $ hg strip -r . --config extensions.strip=
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/t/.hg/strip-backup/550bd84c0cd3-fc575957-backup.hg
   $ hg up -qC 2
   $ hg rebase --keep -d 1 -b 2 --config extensions.rebase= --config experimental.copytrace=off --config ui.interactive=True << EOF
   > c
   > EOF
   rebasing 2:add3f11052fa tip "other"
   file 'a' was deleted in local [dest] but was modified in other [source].
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? c
 
   $ cat b
   1
   2
 
   $ cd ..
 
 Verify disabling copy tracing still keeps copies from rebase source
 -------------------------------------------------------------------
 
   $ hg init copydisable
   $ cd copydisable
   $ touch a
   $ hg ci -Aqm 'add a'
   $ touch b
   $ hg ci -Aqm 'add b, c'
   $ hg cp b x
   $ echo x >> x
   $ hg ci -qm 'copy b->x'
   $ hg up -q 1
   $ touch z
   $ hg ci -Aqm 'add z'
   $ hg log -G -T '{rev} {desc}\n'
   @  3 add z
   |
   | o  2 copy b->x
   |/
   o  1 add b, c
   |
   o  0 add a
   
   $ hg rebase -d . -b 2 --config extensions.rebase= --config experimental.copytrace=off
   rebasing 2:6adcf8c12e7d "copy b->x"
   saved backup bundle to $TESTTMP/copydisable/.hg/strip-backup/6adcf8c12e7d-ce4b3e75-rebase.hg
   $ hg up -q 3
   $ hg log -f x -T '{rev} {desc}\n'
   3 copy b->x
   1 add b, c
 
   $ cd ../
 
 
 test storage preservation
 -------------------------
 
 Verify rebase do not discard recorded copies data when copy tracing usage is
 disabled.
 
 Setup
 
   $ hg init copydisable3
   $ cd copydisable3
   $ touch a
   $ hg ci -Aqm 'add a'
   $ hg cp a b
   $ hg ci -Aqm 'copy a->b'
   $ hg mv b c
   $ hg ci -Aqm 'move b->c'
   $ hg up -q 0
   $ hg cp a b
   $ echo b >> b
   $ hg ci -Aqm 'copy a->b (2)'
   $ hg log -G -T '{rev} {desc}\n'
   @  3 copy a->b (2)
   |
   | o  2 move b->c
   | |
   | o  1 copy a->b
   |/
   o  0 add a
   
 
 Actual Test
 
 A file is copied on one side and has been moved twice on the other side. the
 file is copied from `0:a`, so the file history of the `3:b` should trace directly to `0:a`.
 
   $ hg rebase -d 2 -s 3 --config extensions.rebase= --config experimental.copytrace=off
   rebasing 3:47e1a9e6273b tip "copy a->b (2)"
   saved backup bundle to $TESTTMP/copydisable3/.hg/strip-backup/47e1a9e6273b-2d099c59-rebase.hg
 
   $ hg log -G -f b
   @  changeset:   3:76024fb4b05b
   :  tag:         tip
   :  user:        test
   :  date:        Thu Jan 01 00:00:00 1970 +0000
   :  summary:     copy a->b (2)
   :
   o  changeset:   0:ac82d8b1f7c4
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     add a
   

tests/test-double-merge.t

@@ -1,66 +1,66 b''
   $ hg init repo
   $ cd repo
 
   $ echo line 1 > foo
   $ hg ci -qAm 'add foo'
 
 copy foo to bar and change both files
   $ hg cp foo bar
   $ echo line 2-1 >> foo
   $ echo line 2-2 >> bar
   $ hg ci -m 'cp foo bar; change both'
 
 in another branch, change foo in a way that doesn't conflict with
 the other changes
   $ hg up -qC 0
   $ echo line 0 > foo
   $ hg cat foo >> foo
   $ hg ci -m 'change foo'
   created new head
 
 we get conflicts that shouldn't be there
   $ hg merge -P
   changeset:   1:484bf6903104
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     cp foo bar; change both
   
   $ hg merge --debug
     unmatched files in other:
      bar
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on remote side:
       src: 'foo' -> dst: 'bar' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: e6dc8efe11cc, local: 6a0df1dad128+, remote: 484bf6903104
   starting 4 threads for background file closing (?)
    preserving foo for resolve of bar
    preserving foo for resolve of foo
-   bar: remote copied from foo -> m (premerge)
+   bar: remote copied from foo -> m
   picked tool ':merge' for bar (binary False symlink False changedelete False)
   merging foo and bar to bar
   my bar@6a0df1dad128+ other bar@484bf6903104 ancestor foo@e6dc8efe11cc
    premerge successful
-   foo: versions differ -> m (premerge)
+   foo: versions differ -> m
   picked tool ':merge' for foo (binary False symlink False changedelete False)
   merging foo
   my foo@6a0df1dad128+ other foo@484bf6903104 ancestor foo@e6dc8efe11cc
    premerge successful
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 contents of foo
   $ cat foo
   line 0
   line 1
   line 2-1
 
 contents of bar
   $ cat bar
   line 0
   line 1
   line 2-2
 
   $ cd ..

tests/test-graft.t

@@ -1,926 +1,925 b''
   $ cat >> $HGRCPATH <<EOF
   > [extdiff]
   > # for portability:
   > pdiff = sh "$RUNTESTDIR/pdiff"
   > EOF
 
 Create a repo with some stuff in it:
 
   $ hg init a
   $ cd a
   $ echo a > a
   $ echo a > d
   $ echo a > e
   $ hg ci -qAm0
   $ echo b > a
   $ hg ci -m1 -u bar
   $ hg mv a b
   $ hg ci -m2
   $ hg cp b c
   $ hg ci -m3 -u baz
   $ echo b > d
   $ echo f > e
   $ hg ci -m4
   $ hg up -q 3
   $ echo b > e
   $ hg branch -q stable
   $ hg ci -m5
   $ hg merge -q default --tool internal:local # for conflicts in e, choose 5 and ignore 4
   $ hg branch -q default
   $ hg ci -m6
   $ hg phase --public 3
   $ hg phase --force --secret 6
 
   $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
   @    [e-mail]: 6
   |\
   | o  [e-mail]: 5
   | |
   o |  [e-mail]: 4
   |/
   o  [e-mail]: 3
   |
   o  [e-mail]: 2
   |
   o  [e-mail]: 1
   |
   o  [e-mail]: 0
   
 Test --base for grafting the merge of 4 from the perspective of 5, thus only getting the change to d
 
   $ hg up -cqr 3
   $ hg graft -r 6 --base 5
   grafting 6:25a2b029d3ae "6" (tip)
   merging e
   $ hg st --change .
   M d
 
   $ hg -q strip . --config extensions.strip=
 
 Test --base for collapsing changesets 2 and 3, thus getting both b and c
 
   $ hg up -cqr 0
   $ hg graft -r 3 --base 1
   grafting 3:4c60f11aa304 "3"
   merging a and b to b
   merging a and c to c
   $ hg st --change .
   A b
   A c
   R a
 
   $ hg -q strip . --config extensions.strip=
 
 Specifying child as --base revision fails safely (perhaps slightly confusing, but consistent)
 
   $ hg graft -r 2 --base 3
   grafting 2:5c095ad7e90f "2"
   note: possible conflict - c was deleted and renamed to:
    a
   note: graft of 2:5c095ad7e90f created no changes to commit
 
 Can't continue without starting:
 
   $ hg -q up -cr tip
   $ hg rm -q e
   $ hg graft --continue
   abort: no graft in progress
   [20]
   $ hg revert -r . -q e
 
 Need to specify a rev:
 
   $ hg graft
   abort: no revisions specified
   [10]
 
 Can't graft ancestor:
 
   $ hg graft 1 2
   skipping ancestor revision 1:5d205f8b35b6
   skipping ancestor revision 2:5c095ad7e90f
   [255]
 
 Specify revisions with -r:
 
   $ hg graft -r 1 -r 2
   skipping ancestor revision 1:5d205f8b35b6
   skipping ancestor revision 2:5c095ad7e90f
   [255]
 
   $ hg graft -r 1 2
   warning: inconsistent use of --rev might give unexpected revision ordering!
   skipping ancestor revision 2:5c095ad7e90f
   skipping ancestor revision 1:5d205f8b35b6
   [255]
 
 Conflicting date/user options:
 
   $ hg up -q 0
   $ hg graft -U --user foo 2
   abort: cannot specify both --user and --currentuser
   [10]
   $ hg graft -D --date '0 0' 2
   abort: cannot specify both --date and --currentdate
   [10]
 
 Can't graft with dirty wd:
 
   $ hg up -q 0
   $ echo foo > a
   $ hg graft 1
   abort: uncommitted changes
   [20]
   $ hg revert a
 
 Graft a rename:
 (this also tests that editor is invoked if '--edit' is specified)
 
   $ hg status --rev "2^1" --rev 2
   A b
   R a
   $ HGEDITOR=cat hg graft 2 -u foo --edit
   grafting 2:5c095ad7e90f "2"
   merging a and b to b
   2
   
   
   HG: Enter commit message.  Lines beginning with 'HG:' are removed.
   HG: Leave message empty to abort commit.
   HG: --
   HG: user: foo
   HG: branch 'default'
   HG: added b
   HG: removed a
   $ hg export tip --git
   # HG changeset patch
   # User foo
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID ef0ef43d49e79e81ddafdc7997401ba0041efc82
   # Parent  68795b066622ca79a25816a662041d8f78f3cd9e
   2
   
   diff --git a/a b/b
   rename from a
   rename to b
 
 Look for extra:source
 
   $ hg log --debug -r tip
   changeset:   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
   tag:         tip
   phase:       draft
   parent:      0:68795b066622ca79a25816a662041d8f78f3cd9e
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    7:e59b6b228f9cbf9903d5e9abf996e083a1f533eb
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   files+:      b
   files-:      a
   extra:       branch=default
   extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   description:
   2
   
   
 
 Graft out of order, skipping a merge and a duplicate
 (this also tests that editor is not invoked if '--edit' is not specified)
 
   $ hg graft 1 5 4 3 'merge()' 2 -n
   skipping ungraftable merge revision 6
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   grafting 1:5d205f8b35b6 "1"
   grafting 5:97f8bfe72746 "5"
   grafting 4:9c233e8e184d "4"
   grafting 3:4c60f11aa304 "3"
 
   $ HGEDITOR=cat hg graft 1 5 'merge()' 2 --debug
   skipping ungraftable merge revision 6
   scanning for duplicate grafts
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   grafting 1:5d205f8b35b6 "1"
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on local side:
       src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 68795b066622, local: ef0ef43d49e7+, remote: 5d205f8b35b6
   starting 4 threads for background file closing (?)
    preserving b for resolve of b
-   b: local copied/moved from a -> m (premerge)
+   b: local copied/moved from a -> m
   picked tool ':merge' for b (binary False symlink False changedelete False)
   merging b and a to b
   my b@ef0ef43d49e7+ other a@5d205f8b35b6 ancestor a@68795b066622
    premerge successful
   committing files:
   b
   committing manifest
   committing changelog
   updating the branch cache
   grafting 5:97f8bfe72746 "5"
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 6b9e5368ca4e+, remote: 97f8bfe72746
    e: remote is newer -> g
   getting e
   committing files:
   e
   committing manifest
   committing changelog
   updating the branch cache
   $ HGEDITOR=cat hg graft 4 3 --log --debug
   scanning for duplicate grafts
   grafting 4:9c233e8e184d "4"
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 1905859650ec+, remote: 9c233e8e184d
    d: remote is newer -> g
   getting d
    preserving e for resolve of e
-   e: versions differ -> m (premerge)
+   e: versions differ -> m
   picked tool ':merge' for e (binary False symlink False changedelete False)
   merging e
   my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
-   e: versions differ -> m (merge)
   picked tool ':merge' for e (binary False symlink False changedelete False)
   my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [1]
 
 Summary should mention graft:
 
   $ hg summary |grep graft
   commit: 2 modified, 2 unknown, 1 unresolved (graft in progress)
 
 Using status to get more context
 
   $ hg status --verbose
   M d
   M e
   ? a.orig
   ? e.orig
   # The repository is in an unfinished *graft* state.
   
   # Unresolved merge conflicts:
   # 
   #     e
   # 
   # To mark files as resolved:  hg resolve --mark FILE
   
   # To continue:    hg graft --continue
   # To abort:       hg graft --abort
   # To stop:        hg graft --stop
   
 
 Commit while interrupted should fail:
 
   $ hg ci -m 'commit interrupted graft'
   abort: graft in progress
   (use 'hg graft --continue' or 'hg graft --stop' to stop)
   [20]
 
 Abort the graft and try committing:
 
   $ hg up -C .
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo c >> e
   $ hg ci -mtest
 
   $ hg strip . --config extensions.strip=
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/a/.hg/strip-backup/*-backup.hg (glob)
 
 Graft again:
 
   $ hg graft 1 5 4 3 'merge()' 2
   skipping ungraftable merge revision 6
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   skipping revision 1:5d205f8b35b6 (already grafted to 8:6b9e5368ca4e)
   skipping revision 5:97f8bfe72746 (already grafted to 9:1905859650ec)
   grafting 4:9c233e8e184d "4"
   merging e
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [1]
 
 Continue without resolve should fail:
 
   $ hg graft -c
   grafting 4:9c233e8e184d "4"
   abort: unresolved merge conflicts (see 'hg help resolve')
   [20]
 
 Fix up:
 
   $ echo b > e
   $ hg resolve -m e
   (no more unresolved files)
   continue: hg graft --continue
 
 Continue with a revision should fail:
 
   $ hg graft -c 6
   abort: can't specify --continue and revisions
   [10]
 
   $ hg graft -c -r 6
   abort: can't specify --continue and revisions
   [10]
 
 Continue for real, clobber usernames
 
   $ hg graft -c -U
   grafting 4:9c233e8e184d "4"
   grafting 3:4c60f11aa304 "3"
 
 Compare with original:
 
   $ hg diff -r 6
   $ hg status --rev 0:. -C
   M d
   M e
   A b
     a
   A c
     a
   R a
 
 View graph:
 
   $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
   @  [e-mail]: 3
   |
   o  [e-mail]: 4
   |
   o  [e-mail]: 5
   |
   o  [e-mail]: 1
   |
   o  [e-mail]: 2
   |
   | o    [e-mail]: 6
   | |\
   | | o  [e-mail]: 5
   | | |
   | o |  [e-mail]: 4
   | |/
   | o  [e-mail]: 3
   | |
   | o  [e-mail]: 2
   | |
   | o  [e-mail]: 1
   |/
   o  [e-mail]: 0
   
 Graft again onto another branch should preserve the original source
   $ hg up -q 0
   $ echo 'g'>g
   $ hg add g
   $ hg ci -m 7
   created new head
   $ hg graft 7
   grafting 7:ef0ef43d49e7 "2"
 
   $ hg log -r 7 --template '{rev}:{node}\n'
   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
   $ hg log -r 2 --template '{rev}:{node}\n'
   2:5c095ad7e90f871700f02dd1fa5012cb4498a2d4
 
   $ hg log --debug -r tip
   changeset:   13:7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   tag:         tip
   phase:       draft
   parent:      12:b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    13:dc313617b8c32457c0d589e0dbbedfe71f3cd637
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   files+:      b
   files-:      a
   extra:       branch=default
   extra:       intermediate-source=ef0ef43d49e79e81ddafdc7997401ba0041efc82
   extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   description:
   2
   
   
 Disallow grafting an already grafted cset onto its original branch
   $ hg up -q 6
   $ hg graft 7
   skipping already grafted revision 7:ef0ef43d49e7 (was grafted from 2:5c095ad7e90f)
   [255]
 
   $ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13
   --- */hg-5c095ad7e90f.patch	* (glob)
   +++ */hg-7a4785234d87.patch	* (glob)
   @@ -1,18 +1,18 @@
    # HG changeset patch
   -# User test
   +# User foo
    # Date 0 0
    #      Thu Jan 01 00:00:00 1970 +0000
   -# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   -# Parent  5d205f8b35b66bc36375c9534ffd3237730e8f04
   +# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   +# Parent  b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
    2
    
   -diff -r 5d205f8b35b6 -r 5c095ad7e90f a
   +diff -r b592ea63bb0c -r 7a4785234d87 a
    --- a/a	Thu Jan 01 00:00:00 1970 +0000
    +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
    @@ -1,1 +0,0 @@
   --b
   -diff -r 5d205f8b35b6 -r 5c095ad7e90f b
   +-a
   +diff -r b592ea63bb0c -r 7a4785234d87 b
    --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
    +++ b/b	Thu Jan 01 00:00:00 1970 +0000
    @@ -0,0 +1,1 @@
   -+b
   ++a
   [1]
 
   $ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13 -X .
   --- */hg-5c095ad7e90f.patch	* (glob)
   +++ */hg-7a4785234d87.patch	* (glob)
   @@ -1,8 +1,8 @@
    # HG changeset patch
   -# User test
   +# User foo
    # Date 0 0
    #      Thu Jan 01 00:00:00 1970 +0000
   -# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   -# Parent  5d205f8b35b66bc36375c9534ffd3237730e8f04
   +# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   +# Parent  b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
    2
    
   [1]
 
 Disallow grafting already grafted csets with the same origin onto each other
   $ hg up -q 13
   $ hg graft 2
   skipping revision 2:5c095ad7e90f (already grafted to 13:7a4785234d87)
   [255]
   $ hg graft 7
   skipping already grafted revision 7:ef0ef43d49e7 (13:7a4785234d87 also has origin 2:5c095ad7e90f)
   [255]
 
   $ hg up -q 7
   $ hg graft 2
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   [255]
   $ hg graft tip
   skipping already grafted revision 13:7a4785234d87 (7:ef0ef43d49e7 also has origin 2:5c095ad7e90f)
   [255]
 
 Graft with --log
 
   $ hg up -Cq 1
   $ hg graft 3 --log -u foo
   grafting 3:4c60f11aa304 "3"
   $ hg log --template '{rev}:{node|short} {parents} {desc}\n' -r tip
   14:0c921c65ef1e 1:5d205f8b35b6  3
   (grafted from 4c60f11aa304a54ae1c199feb94e7fc771e51ed8)
 
 Resolve conflicted graft
   $ hg up -q 0
   $ echo b > a
   $ hg ci -m 8
   created new head
   $ echo c > a
   $ hg ci -m 9
   $ hg graft 1 --tool internal:fail
   grafting 1:5d205f8b35b6 "1"
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [1]
   $ hg resolve --all
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   [1]
   $ cat a
   <<<<<<< local: aaa4406d4f0a - test: 9
   c
   =======
   b
   >>>>>>> graft: 5d205f8b35b6 - bar: 1
   $ echo b > a
   $ hg resolve -m a
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft -c
   grafting 1:5d205f8b35b6 "1"
   $ hg export tip --git
   # HG changeset patch
   # User bar
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID f67661df0c4804d301f064f332b57e7d5ddaf2be
   # Parent  aaa4406d4f0ae9befd6e58c82ec63706460cbca6
   1
   
   diff --git a/a b/a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -c
   +b
 
 Resolve conflicted graft with rename
   $ echo c > a
   $ hg ci -m 10
   $ hg graft 2 --tool internal:fail
   grafting 2:5c095ad7e90f "2"
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [1]
   $ hg resolve --all
   merging a and b to b
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft -c
   grafting 2:5c095ad7e90f "2"
   $ hg export tip --git
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID 9627f653b421c61fc1ea4c4e366745070fa3d2bc
   # Parent  ee295f490a40b97f3d18dd4c4f1c8936c233b612
   2
   
   diff --git a/a b/b
   rename from a
   rename to b
 
 Test simple origin(), with and without args
   $ hg log -r 'origin()'
   changeset:   1:5d205f8b35b6
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   3:4c60f11aa304
   user:        baz
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   4:9c233e8e184d
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     4
   
   changeset:   5:97f8bfe72746
   branch:      stable
   parent:      3:4c60f11aa304
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     5
   
   $ hg log -r 'origin(7)'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Now transplant a graft to test following through copies
   $ hg up -q 0
   $ hg branch -q dev
   $ hg ci -qm "dev branch"
   $ hg --config extensions.transplant= transplant -q 7
   $ hg log -r 'origin(.)'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Test that the graft and transplant markers in extra are converted, allowing
 origin() to still work.  Note that these recheck the immediately preceeding two
 tests.
   $ hg --quiet --config extensions.convert= --config convert.hg.saverev=True convert . ../converted
 
 The graft case
   $ hg -R ../converted log -r 7 --template "{rev}: {node}\n{join(extras, '\n')}\n"
   7: 7ae846e9111fc8f57745634250c7b9ac0a60689b
   branch=default
   convert_revision=ef0ef43d49e79e81ddafdc7997401ba0041efc82
   source=e0213322b2c1a5d5d236c74e79666441bee67a7d
   $ hg -R ../converted log -r 'origin(7)'
   changeset:   2:e0213322b2c1
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Test that template correctly expands more than one 'extra' (issue4362), and that
 'intermediate-source' is converted.
   $ hg -R ../converted log -r 13 --template "{extras % ' Extra: {extra}\n'}"
    Extra: branch=default
    Extra: convert_revision=7a4785234d87ec1aa420ed6b11afe40fa73e12a9
    Extra: intermediate-source=7ae846e9111fc8f57745634250c7b9ac0a60689b
    Extra: source=e0213322b2c1a5d5d236c74e79666441bee67a7d
 
 The transplant case
   $ hg -R ../converted log -r tip --template "{rev}: {node}\n{join(extras, '\n')}\n"
   21: fbb6c5cc81002f2b4b49c9d731404688bcae5ade
   branch=dev
   convert_revision=7e61b508e709a11d28194a5359bc3532d910af21
   transplant_source=z\xe8F\xe9\x11\x1f\xc8\xf5wEcBP\xc7\xb9\xac\n`h\x9b
   $ hg -R ../converted log -r 'origin(tip)'
   changeset:   2:e0213322b2c1
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 
 Test simple destination
   $ hg log -r 'destination()'
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   8:6b9e5368ca4e
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   9:1905859650ec
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     5
   
   changeset:   10:52dc0b4c6907
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     4
   
   changeset:   11:882b35362a6b
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   13:7a4785234d87
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   14:0c921c65ef1e
   parent:      1:5d205f8b35b6
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   17:f67661df0c48
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   19:9627f653b421
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg log -r 'destination(2)'
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   13:7a4785234d87
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   19:9627f653b421
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Transplants of grafts can find a destination...
   $ hg log -r 'destination(7)'
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 ... grafts of grafts unfortunately can't
   $ hg graft -q 13 --debug
   scanning for duplicate grafts
   grafting 13:7a4785234d87 "2"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on local side:
       src: 'a' -> dst: 'b' *
      on remote side:
       src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: b592ea63bb0c, local: 7e61b508e709+, remote: 7a4785234d87
   starting 4 threads for background file closing (?)
   nothing to commit, clearing merge state
   note: graft of 13:7a4785234d87 created no changes to commit
   $ hg log -r 'destination(13)'
 All copies of a cset
   $ hg log -r 'origin(13) or destination(origin(13))'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   13:7a4785234d87
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   19:9627f653b421
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 
 graft skips ancestors
 
   $ hg graft 21 3
   skipping ancestor revision 21:7e61b508e709
   grafting 3:4c60f11aa304 "3"
   merging b and c to c
 
 graft with --force (still doesn't graft merges)
 
   $ hg graft 19 0 6
   skipping ungraftable merge revision 6
   skipping ancestor revision 0:68795b066622
   grafting 19:9627f653b421 "2"
   merging b
   note: graft of 19:9627f653b421 created no changes to commit
   $ hg graft 19 0 6 --force
   skipping ungraftable merge revision 6
   grafting 19:9627f653b421 "2"
   merging b
   note: graft of 19:9627f653b421 created no changes to commit
   grafting 0:68795b066622 "0"
 
 graft --force after backout. Do the backout with graft too, to make
 sure we support issue6248.
 
   $ echo abc > a
   $ hg ci -m 24
   $ hg graft --base . -r ".^" --no-commit
   grafting 23:b1cac6de36a9 "0"
   $ hg commit -m 'Backed out changeset 2e7ea477be26'
   $ hg graft 24
   skipping ancestor revision 24:2e7ea477be26
   [255]
   $ hg graft 24 --force
   grafting 24:2e7ea477be26 "24"
   merging a
   $ cat a
   abc
 
 graft --continue after --force
 
   $ echo def > a
   $ hg ci -m 27
   $ hg graft 24 --force --tool internal:fail
   grafting 24:2e7ea477be26 "24"
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [1]
   $ hg resolve --all
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   [1]
   $ echo abc > a
   $ hg resolve -m a
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft -c
   grafting 24:2e7ea477be26 "24"
   $ cat a
   abc
 
 graft --continue after --base with conflits
 
   $ echo base > d
   $ hg ci -m _
   $ hg graft -r 6
   skipping ungraftable merge revision 6
   [255]
   $ hg graft -r 6 --base 5
   grafting 6:25a2b029d3ae "6"
   merging d
+  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
   merging e
-  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [1]
   $ echo a > d && hg resolve -qm
   continue: hg graft --continue
   $ hg graft --continue
   grafting 6:25a2b029d3ae "6"
 
 Continue testing same origin policy, using revision numbers from test above
 but do some destructive editing of the repo:
 
   $ hg up -qC 7
   $ hg tag -l -r 13 tmp
   $ hg --config extensions.strip= strip 2
   saved backup bundle to $TESTTMP/a/.hg/strip-backup/5c095ad7e90f-d323a1e4-backup.hg
   $ hg graft tmp
   skipping already grafted revision 8:7a4785234d87 (2:ef0ef43d49e7 also has unknown origin 5c095ad7e90f)
   [255]
 
 Empty graft
 
   $ hg up -qr 22
   $ hg tag -f something
   $ hg graft -qr 23
   $ hg graft -f 23
   grafting 23:72d9c7c75bcc "24"
   note: graft of 23:72d9c7c75bcc created no changes to commit
 
   $ cd ..
 
 Graft to duplicate a commit
 
   $ hg init graftsibling
   $ cd graftsibling
   $ touch a
   $ hg commit -qAm a
   $ touch b
   $ hg commit -qAm b
   $ hg log -G -T '{rev}\n'
   @  1
   |
   o  0
   
   $ hg up -q 0
   $ hg graft -r 1
   grafting 1:0e067c57feba "b" (tip)
   $ hg log -G -T '{rev}\n'
   @  2
   |
   | o  1
   |/
   o  0
   
 Graft to duplicate a commit twice
 
   $ hg up -q 0
   $ hg graft -r 2
   grafting 2:044ec77f6389 "b" (tip)
   $ hg log -G -T '{rev}\n'
   @  3
   |
   | o  2
   |/
   | o  1
   |/
   o  0
   

tests/test-issue672.t

@@ -1,99 +1,99 b''
 https://bz.mercurial-scm.org/672
 
 # 0-2-4
 #  \ \ \
 #   1-3-5
 #
 # rename in #1, content change in #4.
 
   $ hg init
 
   $ touch 1
   $ touch 2
   $ hg commit -Am init  # 0
   adding 1
   adding 2
 
   $ hg rename 1 1a
   $ hg commit -m rename # 1
 
   $ hg co -C 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ echo unrelated >> 2
   $ hg ci -m unrelated1 # 2
   created new head
 
   $ hg merge --debug 1
     unmatched files in other:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on remote side:
       src: '1' -> dst: '1a' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a
    1: other deleted -> r
   removing 1
    1a: remote created -> g
   getting 1a
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg ci -m merge1 # 3
 
   $ hg co -C 2
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ echo hello >> 1
   $ hg ci -m unrelated2 # 4
   created new head
 
   $ hg co -C 3
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge -y --debug 4
     unmatched files in local:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on local side:
       src: '1' -> dst: '1a' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: c64f439569a9, local: f4a9cff3cd0b+, remote: 746e9549ea96
   starting 4 threads for background file closing (?)
    preserving 1a for resolve of 1a
-   1a: local copied/moved from 1 -> m (premerge)
+   1a: local copied/moved from 1 -> m
   picked tool ':merge' for 1a (binary False symlink False changedelete False)
   merging 1a and 1 to 1a
   my 1a@f4a9cff3cd0b+ other 1@746e9549ea96 ancestor 1@c64f439569a9
    premerge successful
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg co -C 4
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge -y --debug 3
     unmatched files in other:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on remote side:
       src: '1' -> dst: '1a' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: c64f439569a9, local: 746e9549ea96+, remote: f4a9cff3cd0b
   starting 4 threads for background file closing (?)
    preserving 1 for resolve of 1a
   removing 1
-   1a: remote moved from 1 -> m (premerge)
+   1a: remote moved from 1 -> m
   picked tool ':merge' for 1a (binary False symlink False changedelete False)
   merging 1 and 1a to 1a
   my 1a@746e9549ea96+ other 1a@f4a9cff3cd0b ancestor 1@c64f439569a9
    premerge successful
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 

tests/test-merge-commit.t

@@ -1,183 +1,183 b''
 Check that renames are correctly saved by a commit after a merge
 
 Test with the merge on 3 having the rename on the local parent
 
   $ hg init a
   $ cd a
 
   $ echo line1 > foo
   $ hg add foo
   $ hg ci -m '0: add foo'
 
   $ echo line2 >> foo
   $ hg ci -m '1: change foo'
 
   $ hg up -C 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg mv foo bar
   $ rm bar
   $ echo line0 > bar
   $ echo line1 >> bar
   $ hg ci -m '2: mv foo bar; change bar'
   created new head
 
   $ hg merge 1
   merging bar and foo to bar
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat bar
   line0
   line1
   line2
 
   $ hg ci -m '3: merge with local rename'
 
   $ hg debugindex bar
      rev linkrev nodeid       p1           p2
        0       2 d35118874825 000000000000 000000000000
        1       3 5345f5ab8abd 000000000000 d35118874825
 
   $ hg debugrename bar
   bar renamed from foo:9e25c27b87571a1edee5ae4dddee5687746cc8e2
 
   $ hg debugindex foo
      rev linkrev nodeid       p1           p2
        0       0 690b295714ae 000000000000 000000000000
        1       1 9e25c27b8757 690b295714ae 000000000000
 
 
 Revert the content change from rev 2:
 
   $ hg up -C 2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm bar
   $ echo line1 > bar
   $ hg ci -m '4: revert content change from rev 2'
   created new head
 
   $ hg log --template '{rev}:{node|short} {parents}\n'
   4:2263c1be0967 2:0f2ff26688b9 
   3:0555950ead28 2:0f2ff26688b9 1:5cd961e4045d 
   2:0f2ff26688b9 0:2665aaee66e9 
   1:5cd961e4045d 
   0:2665aaee66e9 
 
 This should use bar@rev2 as the ancestor:
 
   $ hg --debug merge 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f2ff26688b9, local: 2263c1be0967+, remote: 0555950ead28
   starting 4 threads for background file closing (?)
    preserving bar for resolve of bar
-   bar: versions differ -> m (premerge)
+   bar: versions differ -> m
   picked tool ':merge' for bar (binary False symlink False changedelete False)
   merging bar
   my bar@2263c1be0967+ other bar@0555950ead28 ancestor bar@0f2ff26688b9
    premerge successful
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat bar
   line1
   line2
 
   $ hg ci -m '5: merge'
 
   $ hg debugindex bar
      rev linkrev nodeid       p1           p2
        0       2 d35118874825 000000000000 000000000000
        1       3 5345f5ab8abd 000000000000 d35118874825
        2       4 ff4b45017382 d35118874825 000000000000
        3       5 3701b4893544 ff4b45017382 5345f5ab8abd
 
 
 Same thing, but with the merge on 3 having the rename
 on the remote parent:
 
   $ cd ..
   $ hg clone -U -r 1 -r 2 a b
   adding changesets
   adding manifests
   adding file changes
   added 3 changesets with 3 changes to 2 files (+1 heads)
   new changesets 2665aaee66e9:0f2ff26688b9
   $ cd b
 
   $ hg up -C 1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg merge 2
   merging foo and bar to bar
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat bar
   line0
   line1
   line2
 
   $ hg ci -m '3: merge with remote rename'
 
   $ hg debugindex bar
      rev linkrev nodeid       p1           p2
        0       2 d35118874825 000000000000 000000000000
        1       3 5345f5ab8abd 000000000000 d35118874825
 
   $ hg debugrename bar
   bar renamed from foo:9e25c27b87571a1edee5ae4dddee5687746cc8e2
 
   $ hg debugindex foo
      rev linkrev nodeid       p1           p2
        0       0 690b295714ae 000000000000 000000000000
        1       1 9e25c27b8757 690b295714ae 000000000000
 
 
 Revert the content change from rev 2:
 
   $ hg up -C 2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm bar
   $ echo line1 > bar
   $ hg ci -m '4: revert content change from rev 2'
   created new head
 
   $ hg log --template '{rev}:{node|short} {parents}\n'
   4:2263c1be0967 2:0f2ff26688b9 
   3:3ffa6b9e35f0 1:5cd961e4045d 2:0f2ff26688b9 
   2:0f2ff26688b9 0:2665aaee66e9 
   1:5cd961e4045d 
   0:2665aaee66e9 
 
 This should use bar@rev2 as the ancestor:
 
   $ hg --debug merge 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f2ff26688b9, local: 2263c1be0967+, remote: 3ffa6b9e35f0
   starting 4 threads for background file closing (?)
    preserving bar for resolve of bar
-   bar: versions differ -> m (premerge)
+   bar: versions differ -> m
   picked tool ':merge' for bar (binary False symlink False changedelete False)
   merging bar
   my bar@2263c1be0967+ other bar@3ffa6b9e35f0 ancestor bar@0f2ff26688b9
    premerge successful
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat bar
   line1
   line2
 
   $ hg ci -m '5: merge'
 
   $ hg debugindex bar
      rev linkrev nodeid       p1           p2
        0       2 d35118874825 000000000000 000000000000
        1       3 5345f5ab8abd 000000000000 d35118874825
        2       4 ff4b45017382 d35118874825 000000000000
        3       5 3701b4893544 ff4b45017382 5345f5ab8abd
 
   $ cd ..

tests/test-merge-criss-cross.t

@@ -1,939 +1,938 b''
 #testcases old newfilenode
 
 #if newfilenode
 Enable the config option
 ------------------------
 
   $ cat >> $HGRCPATH <<EOF
   > [experimental]
   > merge-track-salvaged = True
   > EOF
 #endif
 
 Criss cross merging
 
   $ hg init criss-cross
   $ cd criss-cross
   $ echo '0 base' > f1
   $ echo '0 base' > f2
   $ hg ci -Aqm '0 base'
 
   $ echo '1 first change' > f1
   $ hg ci -m '1 first change f1'
 
   $ hg up -qr0
   $ echo '2 first change' > f2
   $ hg ci -qm '2 first change f2'
 
   $ hg merge -qr 1
   $ hg ci -m '3 merge'
 
   $ hg up -qr2
   $ hg merge -qr1
   $ hg ci -qm '4 merge'
 
   $ echo '5 second change' > f1
   $ hg ci -m '5 second change f1'
 
   $ hg up -r3
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo '6 second change' > f2
   $ hg ci -m '6 second change f2'
 
   $ hg log -G
   @  changeset:   6:3b08d01b0ab5
   |  tag:         tip
   |  parent:      3:cf89f02107e5
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     6 second change f2
   |
   | o  changeset:   5:adfe50279922
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     5 second change f1
   | |
   | o    changeset:   4:7d3e55501ae6
   | |\   parent:      2:40663881a6dd
   | | |  parent:      1:0f6b37dbe527
   | | |  user:        test
   | | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | | |  summary:     4 merge
   | | |
   o---+  changeset:   3:cf89f02107e5
   | | |  parent:      2:40663881a6dd
   |/ /   parent:      1:0f6b37dbe527
   | |    user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | |    summary:     3 merge
   | |
   | o  changeset:   2:40663881a6dd
   | |  parent:      0:40494bf2444c
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     2 first change f2
   | |
   o |  changeset:   1:0f6b37dbe527
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     1 first change f1
   |
   o  changeset:   0:40494bf2444c
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     0 base
   
 
   $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor='!'
   note: using 0f6b37dbe527 as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=40663881a6dd
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
   getting f1
    preserving f2 for resolve of f2
-   f2: versions differ -> m (premerge)
+   f2: versions differ -> m
   picked tool ':dump' for f2 (binary False symlink False changedelete False)
   merging f2
   my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@0f6b37dbe527
-   f2: versions differ -> m (merge)
   picked tool ':dump' for f2 (binary False symlink False changedelete False)
   my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@0f6b37dbe527
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 
   $ f --dump *
   f1:
   >>>
   5 second change
   <<<
   f2:
   >>>
   6 second change
   <<<
   f2.base:
   >>>
   0 base
   <<<
   f2.local:
   >>>
   6 second change
   <<<
   f2.orig:
   >>>
   6 second change
   <<<
   f2.other:
   >>>
   2 first change
   <<<
 
   $ hg up -qC .
   $ hg merge -v --tool internal:dump 5 --config merge.preferancestor="null 40663881 3b08d"
   note: using 40663881a6dd as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=0f6b37dbe527
   resolving manifests
   merging f1
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 
 Redo merge with merge.preferancestor="*" to enable bid merge
 
   $ rm f*
   $ hg up -qC .
   $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: versions differ -> m
    f2: remote unchanged -> k
   
   auction for merging merge bids (2 ancestors)
    list of bids for f1:
      remote is newer -> g
      versions differ -> m
    f1: picking 'get' action
    list of bids for f2:
      remote unchanged -> k
      versions differ -> m
    f2: picking 'keep' action
   end of auction
   
    f1: remote is newer -> g
   getting f1
    f2: remote unchanged -> k
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ f --dump *
   f1:
   >>>
   5 second change
   <<<
   f2:
   >>>
   6 second change
   <<<
 
 
 The other way around:
 
   $ hg up -C -r5
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge -v --debug --config merge.preferancestor="*"
   note: merging adfe50279922+ and 3b08d01b0ab5 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: adfe50279922+, remote: 3b08d01b0ab5
    f1: remote unchanged -> k
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: adfe50279922+, remote: 3b08d01b0ab5
    f1: versions differ -> m
    f2: remote is newer -> g
   
   auction for merging merge bids (2 ancestors)
    list of bids for f1:
      remote unchanged -> k
      versions differ -> m
    f1: picking 'keep' action
    list of bids for f2:
      remote is newer -> g
      versions differ -> m
    f2: picking 'get' action
   end of auction
   
    f2: remote is newer -> g
   getting f2
    f1: remote unchanged -> k
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ f --dump *
   f1:
   >>>
   5 second change
   <<<
   f2:
   >>>
   6 second change
   <<<
 
 Verify how the output looks and and how verbose it is:
 
   $ hg up -qC
   $ hg merge
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg up -qC tip
   $ hg merge -v
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
   resolving manifests
   
   calculating bids for ancestor 40663881a6dd
   resolving manifests
   
   auction for merging merge bids (2 ancestors)
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
   getting f1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg up -qC
   $ hg merge -v --debug --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: versions differ -> m
    f2: remote unchanged -> k
   
   auction for merging merge bids (2 ancestors)
    list of bids for f1:
      remote is newer -> g
      versions differ -> m
    f1: picking 'get' action
    list of bids for f2:
      remote unchanged -> k
      versions differ -> m
    f2: picking 'keep' action
   end of auction
   
    f1: remote is newer -> g
   getting f1
    f2: remote unchanged -> k
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 Test the greatest common ancestor returning multiple changesets
 
   $ hg log -r 'heads(commonancestors(head()))'
   changeset:   1:0f6b37dbe527
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1 first change f1
   
   changeset:   2:40663881a6dd
   parent:      0:40494bf2444c
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2 first change f2
   
 
   $ cd ..
 
 http://stackoverflow.com/questions/9350005/how-do-i-specify-a-merge-base-to-use-in-a-hg-merge/9430810
 
   $ hg init ancestor-merging
   $ cd ancestor-merging
   $ echo a > x
   $ hg commit -A -m a x
   $ hg update -q 0
   $ echo b >> x
   $ hg commit -m b
   $ hg update -q 0
   $ echo c >> x
   $ hg commit -qm c
   $ hg update -q 1
   $ hg merge -q --tool internal:local 2
   $ echo c >> x
   $ hg commit -m bc
   $ hg update -q 2
   $ hg merge -q --tool internal:local 1
   $ echo b >> x
   $ hg commit -qm cb
 
   $ hg merge --config merge.preferancestor='!'
   note: using 70008a2163f6 as ancestor of 0d355fdef312 and 4b8b546a3eef
         alternatively, use --config merge.preferancestor=b211bbc6eb3c
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   c
   b
   c
 
   $ hg up -qC .
 
   $ hg merge --config merge.preferancestor=b211bbc6eb3c
   note: using b211bbc6eb3c as ancestor of 0d355fdef312 and 4b8b546a3eef
         alternatively, use --config merge.preferancestor=70008a2163f6
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   b
   c
   b
 
   $ hg up -qC .
 
   $ hg merge -v --config merge.preferancestor="*"
   note: merging 0d355fdef312+ and 4b8b546a3eef using bids from ancestors 70008a2163f6 and b211bbc6eb3c
   
   calculating bids for ancestor 70008a2163f6
   resolving manifests
   
   calculating bids for ancestor b211bbc6eb3c
   resolving manifests
   
   auction for merging merge bids (2 ancestors)
    x: multiple bids for merge action:
     versions differ -> m
     versions differ -> m
    x: ambiguous merge - picked m action
   end of auction
   
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   c
   b
   c
 
 Verify that the old context ancestor works with / despite preferancestor:
 
   $ hg log -r 'ancestor(head())' --config merge.preferancestor=1 -T '{rev}\n'
   1
   $ hg log -r 'ancestor(head())' --config merge.preferancestor=2 -T '{rev}\n'
   2
   $ hg log -r 'ancestor(head())' --config merge.preferancestor=3 -T '{rev}\n'
   1
   $ hg log -r 'ancestor(head())' --config merge.preferancestor='1337 * - 2' -T '{rev}\n'
   2
 
   $ cd ..
 
   $ hg init issue5020
   $ cd issue5020
 
   $ echo a > noop
   $ hg ci -qAm initial
 
   $ echo b > noop
   $ hg ci -qAm 'uninteresting change'
 
   $ hg up -q 0
   $ mkdir d1
   $ echo a > d1/a
   $ echo b > d1/b
   $ hg ci -qAm 'add d1/a and d1/b'
 
   $ hg merge -q 1
   $ hg rm d1/a
   $ hg mv -q d1 d2
   $ hg ci -qm 'merge while removing d1/a and moving d1/b to d2/b'
 
   $ hg up -q 1
   $ hg merge -q 2
   $ hg ci -qm 'merge (no changes while merging)'
   $ hg log -G -T '{rev}:{node|short} {desc}'
   @    4:c0ef19750a22 merge (no changes while merging)
   |\
   +---o  3:6ca01f7342b9 merge while removing d1/a and moving d1/b to d2/b
   | |/
   | o  2:154e6000f54e add d1/a and d1/b
   | |
   o |  1:11b5b303e36c uninteresting change
   |/
   o  0:7b54db1ebf33 initial
   
   $ hg merge 3 --debug
   note: merging c0ef19750a22+ and 6ca01f7342b9 using bids from ancestors 11b5b303e36c and 154e6000f54e
   
   calculating bids for ancestor 11b5b303e36c
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 11b5b303e36c, local: c0ef19750a22+, remote: 6ca01f7342b9
    d1/a: ancestor missing, remote missing -> kn
    d1/b: ancestor missing, remote missing -> kn
    d2/b: remote created -> g
   
   calculating bids for ancestor 154e6000f54e
     unmatched files in other:
      d2/b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      on remote side:
       src: 'd1/b' -> dst: 'd2/b' 
     checking for directory renames
      discovered dir src: 'd1/' -> dst: 'd2/'
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 154e6000f54e, local: c0ef19750a22+, remote: 6ca01f7342b9
    d1/a: other deleted -> r
    d1/b: other deleted -> r
    d2/b: remote created -> g
   
   auction for merging merge bids (2 ancestors)
    list of bids for d1/a:
      ancestor missing, remote missing -> kn
      other deleted -> r
    d1/a: picking 'keep new' action
    list of bids for d1/b:
      ancestor missing, remote missing -> kn
      other deleted -> r
    d1/b: picking 'keep new' action
    list of bids for d2/b:
      remote created -> g
      remote created -> g
    d2/b: consensus for g
   end of auction
   
    d2/b: remote created -> g
   getting d2/b
    d1/a: ancestor missing, remote missing -> kn
    d1/b: ancestor missing, remote missing -> kn
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 
 Check that removal reversion does not go unotified
 ==================================================
 
 On a merge, a file can be removed and user can revert that removal. This means
 user has made an explicit choice of keeping the file or reverting the removal
 even though the merge algo wanted to remove it.
 Based on this, when we do criss cross merges, merge algorithm should not again
 choose to remove the file as in one of the merges, user made an explicit choice
 to revert the removal.
 Following test cases demonstrate how merge algo does not take in account
 explicit choices made by users to revert the removal and on criss-cross merging
 removes the file again.
 
 "Simple" case where the filenode changes
 ----------------------------------------
 
   $ cd ..
   $ hg init criss-cross-merge-reversal-with-update
   $ cd criss-cross-merge-reversal-with-update
   $ echo the-file > the-file
   $ echo other-file > other-file
   $ hg add the-file other-file
   $ hg ci -m 'root-commit'
   $ echo foo >> the-file
   $ echo bar >> other-file
   $ hg ci -m 'updating-both-file'
   $ hg up 'desc("root-commit")'
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg rm the-file
   $ hg ci -m 'delete-the-file'
   created new head
   $ hg log -G -T '{node|short} {desc}\n'
   @  7801bc9b9899 delete-the-file
   |
   | o  9b610631ab29 updating-both-file
   |/
   o  955800955977 root-commit
   
 
 Do all the merge combination (from the deleted or the update side × keeping and deleting the file
 
   $ hg update 'desc("delete-the-file")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge 'desc("updating-both-file")' -t :local
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg debugmergestate
   local (working copy): 7801bc9b9899de5e304bd162cafde9b78e10ab9b
   other (merge rev): 9b610631ab29024c5f44af7d2c19658ef8f8f071
   file: the-file (state "r")
     local path: the-file (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: the-file (node 4b69178b9bdae28b651393b46e631427a72f217a)
     other path: the-file (node 59e363a07dc876278f0e41756236f30213b6b460)
     extra: ancestorlinknode = 955800955977bd6c103836ee3e437276e940a589
     extra: merge-removal-candidate = yes
     extra: merged = yes
   extra: other-file (filenode-source = other)
   $ hg ci -m "merge-deleting-the-file-from-deleted"
   $ hg manifest
   other-file
   $ hg debugrevlogindex the-file
      rev linkrev nodeid       p1           p2
        0       0 4b69178b9bda 000000000000 000000000000
        1       1 59e363a07dc8 4b69178b9bda 000000000000
 
   $ hg update 'desc("updating-both-file")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge 'desc("delete-the-file")' -t :other
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg debugmergestate
   local (working copy): 9b610631ab29024c5f44af7d2c19658ef8f8f071
   other (merge rev): 7801bc9b9899de5e304bd162cafde9b78e10ab9b
   file: the-file (state "r")
     local path: the-file (hash 6d2e02da5a9fe0691363dc6b573845fa271eaa35, flags "")
     ancestor path: the-file (node 4b69178b9bdae28b651393b46e631427a72f217a)
     other path: the-file (node 0000000000000000000000000000000000000000)
     extra: ancestorlinknode = 955800955977bd6c103836ee3e437276e940a589
     extra: merge-removal-candidate = yes
     extra: merged = yes
   $ hg ci -m "merge-deleting-the-file-from-updated"
   created new head
   $ hg manifest
   other-file
   $ hg debugrevlogindex the-file
      rev linkrev nodeid       p1           p2
        0       0 4b69178b9bda 000000000000 000000000000
        1       1 59e363a07dc8 4b69178b9bda 000000000000
 
   $ hg update 'desc("delete-the-file")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge 'desc("updating-both-file")' -t :other
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg debugmergestate
   local (working copy): 7801bc9b9899de5e304bd162cafde9b78e10ab9b
   other (merge rev): 9b610631ab29024c5f44af7d2c19658ef8f8f071
   file: the-file (state "r")
     local path: the-file (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: the-file (node 4b69178b9bdae28b651393b46e631427a72f217a)
     other path: the-file (node 59e363a07dc876278f0e41756236f30213b6b460)
     extra: ancestorlinknode = 955800955977bd6c103836ee3e437276e940a589
     extra: merge-removal-candidate = yes
     extra: merged = yes
   extra: other-file (filenode-source = other)
   $ hg ci -m "merge-keeping-the-file-from-deleted"
   created new head
   $ hg manifest
   other-file
   the-file
 
   $ hg debugrevlogindex the-file
      rev linkrev nodeid       p1           p2
        0       0 4b69178b9bda 000000000000 000000000000
        1       1 59e363a07dc8 4b69178b9bda 000000000000
        2       5 885af55420b3 59e363a07dc8 000000000000 (newfilenode !)
 
   $ hg update 'desc("updating-both-file")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved (newfilenode !)
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   $ hg merge 'desc("delete-the-file")' -t :local
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg debugmergestate
   local (working copy): 9b610631ab29024c5f44af7d2c19658ef8f8f071
   other (merge rev): 7801bc9b9899de5e304bd162cafde9b78e10ab9b
   file: the-file (state "r")
     local path: the-file (hash 6d2e02da5a9fe0691363dc6b573845fa271eaa35, flags "")
     ancestor path: the-file (node 4b69178b9bdae28b651393b46e631427a72f217a)
     other path: the-file (node 0000000000000000000000000000000000000000)
     extra: ancestorlinknode = 955800955977bd6c103836ee3e437276e940a589
     extra: merge-removal-candidate = yes
     extra: merged = yes
   $ hg ci -m "merge-keeping-the-file-from-updated"
   created new head
   $ hg manifest
   other-file
   the-file
 
 XXX: This should create a new filenode because user explicitly decided to keep
 the file. If we reuse the same filenode, future merges (criss-cross ones mostly)
 will think that file remain unchanged and user explicit choice will not be taken
 in consideration.
   $ hg debugrevlogindex the-file
      rev linkrev nodeid       p1           p2
        0       0 4b69178b9bda 000000000000 000000000000
        1       1 59e363a07dc8 4b69178b9bda 000000000000
        2       5 885af55420b3 59e363a07dc8 000000000000 (newfilenode !)
 
   $ hg log -G -T '{node|short} {desc}\n'
   @    5e3eccec60d8 merge-keeping-the-file-from-updated
   |\
   +---o  38a4c3e7cac8 merge-keeping-the-file-from-deleted (newfilenode !)
   +---o  e9b708131723 merge-keeping-the-file-from-deleted (old !)
   | |/
   +---o  a4e0e44229dc merge-deleting-the-file-from-updated
   | |/
   +---o  adfd88e5d7d3 merge-deleting-the-file-from-deleted
   | |/
   | o  7801bc9b9899 delete-the-file
   | |
   o |  9b610631ab29 updating-both-file
   |/
   o  955800955977 root-commit
   
 
 There the resulting merge together (leading to criss cross situation). Check
 the conflict is properly detected.
 
 (merging two deletion together → no conflict)
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg merge          'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   $ hg debugmergestate
   no merge state found
 
 (merging a deletion with keeping → conflict)
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 #if newfilenode
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
   file 'the-file' was deleted in local [working copy] but was modified in other [merge rev].
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 #else
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 #endif
   $ ls -1
   other-file
   the-file (newfilenode !)
 
 #if newfilenode
   $ hg debugmergestate
   local (working copy): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
   other (merge rev): 38a4c3e7cac8c294ecb0a7a85a05464e9836ca78
   file: the-file (state "u")
     local path: the-file (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: the-file (node 59e363a07dc876278f0e41756236f30213b6b460)
     other path: the-file (node 885af55420b35d7bf3bbd6f546615295bfe6544a)
     extra: ancestorlinknode = 9b610631ab29024c5f44af7d2c19658ef8f8f071
     extra: merge-removal-candidate = yes
     extra: merged = yes
 #else
   $ hg debugmergestate
   local (working copy): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
   other (merge rev): e9b7081317232edce73f7ad5ae0b7807ff5c326a
   extra: the-file (merge-removal-candidate = yes)
 #endif
 
 (merging a deletion with keeping → conflict)
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved (newfilenode !)
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   $ hg merge          'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   $ hg debugmergestate
   local (working copy): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
   other (merge rev): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
   extra: the-file (merge-removal-candidate = yes)
 
 (merging two deletion together → no conflict)
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   $ hg debugmergestate
   no merge state found
 
 (merging a deletion with keeping → conflict)
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 #if newfilenode
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
   file 'the-file' was deleted in local [working copy] but was modified in other [merge rev].
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 #else
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 #endif
 
   $ ls -1
   other-file
   the-file (newfilenode !)
 #if newfilenode
   $ hg debugmergestate
   local (working copy): a4e0e44229dc130be2915b92c957c093f8c7ee3e
   other (merge rev): 38a4c3e7cac8c294ecb0a7a85a05464e9836ca78
   file: the-file (state "u")
     local path: the-file (hash 0000000000000000000000000000000000000000, flags "")
     ancestor path: the-file (node 59e363a07dc876278f0e41756236f30213b6b460)
     other path: the-file (node 885af55420b35d7bf3bbd6f546615295bfe6544a)
     extra: ancestorlinknode = 9b610631ab29024c5f44af7d2c19658ef8f8f071
     extra: merge-removal-candidate = yes
     extra: merged = yes
 #else
   $ hg debugmergestate
   local (working copy): a4e0e44229dc130be2915b92c957c093f8c7ee3e
   other (merge rev): e9b7081317232edce73f7ad5ae0b7807ff5c326a
   extra: the-file (merge-removal-candidate = yes)
 #endif
 
 (merging a deletion with keeping → conflict)
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved (newfilenode !)
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   $ hg merge          'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   $ hg debugmergestate
   local (working copy): a4e0e44229dc130be2915b92c957c093f8c7ee3e
   other (merge rev): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
   extra: the-file (merge-removal-candidate = yes)
 
 (merging two "keeping" together → no conflict)
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-updated")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved (newfilenode !)
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   the-file
 #if newfilenode
   $ hg debugmergestate
   local (working copy): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
   other (merge rev): 38a4c3e7cac8c294ecb0a7a85a05464e9836ca78
   extra: the-file (filenode-source = other)
 #else
   $ hg debugmergestate
   no merge state found
 #endif
 
 (merging a deletion with keeping → conflict)
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-updated")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved (newfilenode !)
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   $ hg merge          'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   the-file
   $ hg debugmergestate
   local (working copy): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
   other (merge rev): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
   extra: the-file (merge-removal-candidate = yes)
 
 (merging a deletion with keeping → conflict)
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   the-file
   $ hg debugmergestate
   local (working copy): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
   other (merge rev): a4e0e44229dc130be2915b92c957c093f8c7ee3e
   extra: the-file (merge-removal-candidate = yes)
 
 (merging two "keeping" together → no conflict)
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-deleted")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved (newfilenode !)
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved (old !)
   $ hg merge          'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
   the-file
   $ hg debugmergestate
   no merge state found
 
 (merging a deletion with keeping → conflict)
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #if newfilenode
   $ hg merge          'desc("merge-deleting-the-file-from-deleted")'
   file 'the-file' was deleted in other [merge rev] but was modified in local [working copy].
   You can use (c)hanged version, (d)elete, or leave (u)nresolved.
   What do you want to do? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 #else
   $ hg merge          'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 #endif
   $ ls -1
   other-file
   the-file
 
 #if newfilenode
   $ hg debugmergestate
   local (working copy): 38a4c3e7cac8c294ecb0a7a85a05464e9836ca78 (newfilenode !)
   local (working copy): e9b7081317232edce73f7ad5ae0b7807ff5c326a (old !)
   other (merge rev): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
   file: the-file (state "u")
     local path: the-file (hash 6d2e02da5a9fe0691363dc6b573845fa271eaa35, flags "")
     ancestor path: the-file (node 59e363a07dc876278f0e41756236f30213b6b460)
     other path: the-file (node 0000000000000000000000000000000000000000)
     extra: ancestorlinknode = 9b610631ab29024c5f44af7d2c19658ef8f8f071
     extra: merge-removal-candidate = yes
     extra: merged = yes
 #else
   $ hg debugmergestate
   local (working copy): e9b7081317232edce73f7ad5ae0b7807ff5c326a
   other (merge rev): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
   extra: the-file (merge-removal-candidate = yes)
 #endif
 
 (merging a deletion with keeping → conflict)
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 #if newfilenode
   $ hg merge          'desc("merge-deleting-the-file-from-updated")'
   file 'the-file' was deleted in other [merge rev] but was modified in local [working copy].
   You can use (c)hanged version, (d)elete, or leave (u)nresolved.
   What do you want to do? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 #else
   $ hg merge          'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 #endif
   $ ls -1
   other-file
   the-file
 #if newfilenode
   $ hg debugmergestate
   local (working copy): 38a4c3e7cac8c294ecb0a7a85a05464e9836ca78
   other (merge rev): a4e0e44229dc130be2915b92c957c093f8c7ee3e
   file: the-file (state "u")
     local path: the-file (hash 6d2e02da5a9fe0691363dc6b573845fa271eaa35, flags "")
     ancestor path: the-file (node 59e363a07dc876278f0e41756236f30213b6b460)
     other path: the-file (node 0000000000000000000000000000000000000000)
     extra: ancestorlinknode = 9b610631ab29024c5f44af7d2c19658ef8f8f071
     extra: merge-removal-candidate = yes
     extra: merged = yes
 #else
   $ hg debugmergestate
   local (working copy): e9b7081317232edce73f7ad5ae0b7807ff5c326a
   other (merge rev): a4e0e44229dc130be2915b92c957c093f8c7ee3e
   extra: the-file (merge-removal-candidate = yes)
 #endif