annotate: introduce attr for storing per-line annotate data

We're going to extend this a bit -- at first by simply adding whether this was
a skipped child. We're well on our way to outgrowing tuples, though -- adding
more and more fields to tuples becomes annoying very quickly.

Differential Revision: https://phab.mercurial-scm.org/D898

mercurial/commands.py

@@ -1,5491 +1,5491
 # commands.py - command processing for mercurial
 #
 # Copyright 2005-2007 Matt 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 difflib
 import errno
 import os
 import re
 import sys
 
 from .i18n import _
 from .node import (
     hex,
     nullid,
     nullrev,
     short,
 )
 from . import (
     archival,
     bookmarks,
     bundle2,
     changegroup,
     cmdutil,
     copies,
     debugcommands as debugcommandsmod,
     destutil,
     dirstateguard,
     discovery,
     encoding,
     error,
     exchange,
     extensions,
     formatter,
     graphmod,
     hbisect,
     help,
     hg,
     lock as lockmod,
     merge as mergemod,
     obsolete,
     patch,
     phases,
     pycompat,
     rcutil,
     registrar,
     revsetlang,
     scmutil,
     server,
     sshserver,
     streamclone,
     tags as tagsmod,
     templatekw,
     ui as uimod,
     util,
 )
 
 release = lockmod.release
 
 table = {}
 table.update(debugcommandsmod.command._table)
 
 command = registrar.command(table)
 
 # common command options
 
 globalopts = [
     ('R', 'repository', '',
      _('repository root directory or name of overlay bundle file'),
      _('REPO')),
     ('', 'cwd', '',
      _('change working directory'), _('DIR')),
     ('y', 'noninteractive', None,
      _('do not prompt, automatically pick the first choice for all prompts')),
     ('q', 'quiet', None, _('suppress output')),
     ('v', 'verbose', None, _('enable additional output')),
     ('', 'color', '',
      # i18n: 'always', 'auto', 'never', and 'debug' are keywords
      # and should not be translated
      _("when to colorize (boolean, always, auto, never, or debug)"),
      _('TYPE')),
     ('', 'config', [],
      _('set/override config option (use \'section.name=value\')'),
      _('CONFIG')),
     ('', 'debug', None, _('enable debugging output')),
     ('', 'debugger', None, _('start debugger')),
     ('', 'encoding', encoding.encoding, _('set the charset encoding'),
      _('ENCODE')),
     ('', 'encodingmode', encoding.encodingmode,
      _('set the charset encoding mode'), _('MODE')),
     ('', 'traceback', None, _('always print a traceback on exception')),
     ('', 'time', None, _('time how long the command takes')),
     ('', 'profile', None, _('print command execution profile')),
     ('', 'version', None, _('output version information and exit')),
     ('h', 'help', None, _('display help and exit')),
     ('', 'hidden', False, _('consider hidden changesets')),
     ('', 'pager', 'auto',
      _("when to paginate (boolean, always, auto, or never)"), _('TYPE')),
 ]
 
 dryrunopts = cmdutil.dryrunopts
 remoteopts = cmdutil.remoteopts
 walkopts = cmdutil.walkopts
 commitopts = cmdutil.commitopts
 commitopts2 = cmdutil.commitopts2
 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('^add',
     walkopts + subrepoopts + dryrunopts,
     _('[OPTION]... [FILE]...'),
     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))
     rejected = cmdutil.add(ui, repo, m, "", False, **opts)
     return rejected and 1 or 0
 
 @command('addremove',
     similarityopts + subrepoopts + walkopts + dryrunopts,
     _('[OPTION]... [FILE]...'),
     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)
     try:
         sim = float(opts.get('similarity') or 100)
     except ValueError:
         raise error.Abort(_('similarity must be a number'))
     if sim < 0 or sim > 100:
         raise error.Abort(_('similarity must be between 0 and 100'))
     matcher = scmutil.match(repo[None], pats, opts)
     return scmutil.addremove(repo, matcher, "", opts, similarity=sim / 100.0)
 
 @command('^annotate|blame',
     [('r', 'rev', '', _('annotate the specified revision'), _('REV')),
     ('', 'follow', None,
      _('follow copies/renames and list the filename (DEPRECATED)')),
     ('', 'no-follow', None, _("don't follow copies and renames")),
     ('a', 'text', None, _('treat all files as text')),
     ('u', 'user', None, _('list the author (long with -v)')),
     ('f', 'file', None, _('list the filename')),
     ('d', 'date', None, _('list the date (short with -q)')),
     ('n', 'number', None, _('list the revision number (default)')),
     ('c', 'changeset', None, _('list the changeset')),
     ('l', 'line-number', None, _('show line number at the first appearance')),
     ('', 'skip', [], _('revision to not display (EXPERIMENTAL)'), _('REV')),
     ] + diffwsopts + walkopts + formatteropts,
     _('[-r REV] [-f] [-a] [-u] [-d] [-n] [-c] [-l] FILE...'),
     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.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     if not pats:
         raise error.Abort(_('at least one filename or pattern is required'))
 
     if opts.get('follow'):
         # --follow is deprecated and now just an alias for -f/--file
         # to mimic the behavior of Mercurial before version 1.5
         opts['file'] = True
 
     ctx = scmutil.revsingle(repo, opts.get('rev'))
 
     rootfm = ui.formatter('annotate', opts)
     if ui.quiet:
         datefunc = util.shortdate
     else:
         datefunc = util.datestr
     if ctx.rev() is None:
         def hexfn(node):
             if node is None:
                 return None
             else:
                 return rootfm.hexfunc(node)
         if opts.get('changeset'):
             # omit "+" suffix which is appended to node hex
             def formatrev(rev):
                 if rev is None:
                     return '%d' % ctx.p1().rev()
                 else:
                     return '%d' % rev
         else:
             def formatrev(rev):
                 if rev is None:
                     return '%d+' % ctx.p1().rev()
                 else:
                     return '%d ' % rev
         def formathex(hex):
             if hex is None:
                 return '%s+' % rootfm.hexfunc(ctx.p1().node())
             else:
                 return '%s ' % hex
     else:
         hexfn = rootfm.hexfunc
         formatrev = formathex = pycompat.bytestr
 
-    opmap = [('user', ' ', lambda x: x[0].user(), ui.shortuser),
-             ('number', ' ', lambda x: x[0].rev(), formatrev),
-             ('changeset', ' ', lambda x: hexfn(x[0].node()), formathex),
-             ('date', ' ', lambda x: x[0].date(), util.cachefunc(datefunc)),
-             ('file', ' ', lambda x: x[0].path(), str),
-             ('line_number', ':', lambda x: x[1], str),
+    opmap = [('user', ' ', lambda x: x.fctx.user(), ui.shortuser),
+             ('number', ' ', lambda x: x.fctx.rev(), formatrev),
+             ('changeset', ' ', lambda x: hexfn(x.fctx.node()), formathex),
+             ('date', ' ', lambda x: x.fctx.date(), util.cachefunc(datefunc)),
+             ('file', ' ', lambda x: x.fctx.path(), str),
+             ('line_number', ':', lambda x: x.lineno, str),
             ]
     fieldnamemap = {'number': 'rev', 'changeset': 'node'}
 
     if (not opts.get('user') and not opts.get('changeset')
         and not opts.get('date') and not opts.get('file')):
         opts['number'] = True
 
     linenumber = opts.get('line_number') is not None
     if linenumber and (not opts.get('changeset')) and (not opts.get('number')):
         raise error.Abort(_('at least one of -n/-c is required for -l'))
 
     ui.pager('annotate')
 
     if rootfm.isplain():
         def makefunc(get, fmt):
             return lambda x: fmt(get(x))
     else:
         def makefunc(get, fmt):
             return get
     funcmap = [(makefunc(get, fmt), sep) for op, sep, get, fmt in opmap
                if opts.get(op)]
     funcmap[0] = (funcmap[0][0], '') # no separator in front of first column
     fields = ' '.join(fieldnamemap.get(op, op) for op, sep, get, fmt in opmap
                       if opts.get(op))
 
     def bad(x, y):
         raise error.Abort("%s: %s" % (x, y))
 
     m = scmutil.match(ctx, pats, opts, badfn=bad)
 
     follow = not opts.get('no_follow')
     diffopts = patch.difffeatureopts(ui, opts, section='annotate',
                                      whitespace=True)
     skiprevs = opts.get('skip')
     if skiprevs:
         skiprevs = scmutil.revrange(repo, skiprevs)
 
     for abs in ctx.walk(m):
         fctx = ctx[abs]
         rootfm.startitem()
         rootfm.data(abspath=abs, path=m.rel(abs))
         if not opts.get('text') and fctx.isbinary():
             rootfm.plain(_("%s: binary file\n")
                          % ((pats and m.rel(abs)) or abs))
             continue
 
         fm = rootfm.nested('lines')
         lines = fctx.annotate(follow=follow, linenumber=linenumber,
                               skiprevs=skiprevs, diffopts=diffopts)
         if not lines:
             fm.end()
             continue
         formats = []
         pieces = []
 
         for f, sep in funcmap:
             l = [f(n) for n, dummy in lines]
             if fm.isplain():
                 sizes = [encoding.colwidth(x) for x in l]
                 ml = max(sizes)
                 formats.append([sep + ' ' * (ml - w) + '%s' for w in sizes])
             else:
                 formats.append(['%s' for x in l])
             pieces.append(l)
 
         for f, p, l in zip(zip(*formats), zip(*pieces), lines):
             fm.startitem()
             fm.write(fields, "".join(f), *p)
             fm.write('line', ": %s", l[1])
 
         if not lines[-1][1].endswith('\n'):
             fm.plain('\n')
         fm.end()
 
     rootfm.end()
 
 @command('archive',
     [('', 'no-decode', None, _('do not pass files through decoders')),
     ('p', 'prefix', '', _('directory prefix for files in archive'),
      _('PREFIX')),
     ('r', 'rev', '', _('revision to distribute'), _('REV')),
     ('t', 'type', '', _('type of distribution to create'), _('TYPE')),
     ] + subrepoopts + walkopts,
     _('[OPTION]... DEST'))
 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
     :``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)
     ctx = scmutil.revsingle(repo, opts.get('rev'))
     if not ctx:
         raise error.Abort(_('no working directory: please specify a revision'))
     node = ctx.node()
     dest = cmdutil.makefilename(repo, dest, node)
     if os.path.realpath(dest) == repo.root:
         raise error.Abort(_('repository root cannot be destination'))
 
     kind = opts.get('type') or archival.guesskind(dest) or 'files'
     prefix = opts.get('prefix')
 
     if dest == '-':
         if kind == 'files':
             raise error.Abort(_('cannot archive plain files to stdout'))
         dest = cmdutil.makefileobj(repo, dest)
         if not prefix:
             prefix = os.path.basename(repo.root) + '-%h'
 
     prefix = cmdutil.makefilename(repo, prefix, node)
     match = scmutil.match(ctx, [], opts)
     archival.archive(repo, dest, node, kind, not opts.get('no_decode'),
                      match, prefix, subrepos=opts.get('subrepos'))
 
 @command('backout',
     [('', 'merge', None, _('merge with old dirstate parent after backout')),
     ('', 'commit', None,
      _('commit if no conflicts were encountered (DEPRECATED)')),
     ('', 'no-commit', None, _('do not commit')),
     ('', 'parent', '',
      _('parent to choose when backing out merge (DEPRECATED)'), _('REV')),
     ('r', 'rev', '', _('revision to backout'), _('REV')),
     ('e', 'edit', False, _('invoke editor on commit messages')),
     ] + mergetoolopts + walkopts + commitopts + commitopts2,
     _('[OPTION]... [-r] REV'))
 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.
     '''
     wlock = lock = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
         return _dobackout(ui, repo, node, rev, **opts)
     finally:
         release(lock, wlock)
 
 def _dobackout(ui, repo, node=None, rev=None, **opts):
     opts = pycompat.byteskwargs(opts)
     if opts.get('commit') and opts.get('no_commit'):
         raise error.Abort(_("cannot use --commit with --no-commit"))
     if opts.get('merge') and opts.get('no_commit'):
         raise error.Abort(_("cannot use --merge with --no-commit"))
 
     if rev and node:
         raise error.Abort(_("please specify just one revision"))
 
     if not rev:
         rev = node
 
     if not rev:
         raise error.Abort(_("please specify a revision to backout"))
 
     date = opts.get('date')
     if date:
         opts['date'] = util.parsedate(date)
 
     cmdutil.checkunfinished(repo)
     cmdutil.bailifchanged(repo)
     node = scmutil.revsingle(repo, rev).node()
 
     op1, op2 = repo.dirstate.parents()
     if not repo.changelog.isancestor(node, op1):
         raise error.Abort(_('cannot backout change that is not an ancestor'))
 
     p1, p2 = repo.changelog.parents(node)
     if p1 == nullid:
         raise error.Abort(_('cannot backout a change with no parents'))
     if p2 != nullid:
         if not opts.get('parent'):
             raise error.Abort(_('cannot backout a merge changeset'))
         p = repo.lookup(opts['parent'])
         if p not in (p1, p2):
             raise error.Abort(_('%s is not a parent of %s') %
                              (short(p), short(node)))
         parent = p
     else:
         if opts.get('parent'):
             raise error.Abort(_('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('merge') and op1 != node:
         dsguard = dirstateguard.dirstateguard(repo, 'backout')
         try:
             ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
                          'backout')
             stats = mergemod.update(repo, parent, True, True, node, False)
             repo.setparents(op1, op2)
             dsguard.close()
             hg._showstats(repo, stats)
             if stats[3]:
                 repo.ui.status(_("use 'hg resolve' to retry unresolved "
                                  "file merges\n"))
                 return 1
         finally:
             ui.setconfig('ui', 'forcemerge', '', '')
             lockmod.release(dsguard)
     else:
         hg.clean(repo, node, show_stats=False)
         repo.dirstate.setbranch(branch)
         cmdutil.revert(ui, repo, rctx, repo.dirstate.parents())
 
     if opts.get('no_commit'):
         msg = _("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 = 'backout'
         e = cmdutil.getcommiteditor(editform=editform,
                                     **pycompat.strkwargs(opts))
         if not message:
             # we don't translate commit messages
             message = "Backed out changeset %s" % short(node)
             e = cmdutil.getcommiteditor(edit=True, editform=editform)
         return repo.commit(message, opts.get('user'), opts.get('date'),
                            match, editor=e)
     newnode = cmdutil.commit(ui, repo, commitfunc, [], opts)
     if not newnode:
         ui.status(_("nothing changed\n"))
         return 1
     cmdutil.commitstatus(repo, newnode, branch, bheads)
 
     def nice(node):
         return '%d:%s' % (repo.changelog.rev(node), short(node))
     ui.status(_('changeset %s backs out changeset %s\n') %
               (nice(repo.changelog.tip()), nice(node)))
     if opts.get('merge') and op1 != node:
         hg.clean(repo, op1, show_stats=False)
         ui.status(_('merging with changeset %s\n')
                   % nice(repo.changelog.tip()))
         try:
             ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
                          'backout')
             return hg.merge(repo, hex(repo.changelog.tip()))
         finally:
             ui.setconfig('ui', 'forcemerge', '', '')
     return 0
 
 @command('bisect',
     [('r', 'reset', False, _('reset bisect state')),
     ('g', 'good', False, _('mark changeset good')),
     ('b', 'bad', False, _('mark changeset bad')),
     ('s', 'skip', False, _('skip testing changeset')),
     ('e', 'extend', False, _('extend the bisect range')),
     ('c', 'command', '', _('use command to check changeset state'), _('CMD')),
     ('U', 'noupdate', False, _('do not update to target'))],
     _("[-gbsr] [-U] [-c CMD] [REV]"))
 def bisect(ui, repo, rev=None, extra=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.
     """
     # backward compatibility
     if rev in "good bad reset init".split():
         ui.warn(_("(use of 'hg bisect <cmd>' is deprecated)\n"))
         cmd, rev, extra = rev, extra, None
         if cmd == "good":
             good = True
         elif cmd == "bad":
             bad = True
         else:
             reset = True
     elif extra:
         raise error.Abort(_('incompatible arguments'))
 
     incompatibles = {
         '--bad': bad,
         '--command': bool(command),
         '--extend': extend,
         '--good': good,
         '--reset': reset,
         '--skip': skip,
     }
 
     enabled = [x for x in incompatibles if incompatibles[x]]
 
     if len(enabled) > 1:
         raise error.Abort(_('%s and %s are incompatible') %
                           tuple(sorted(enabled)[0:2]))
 
     if reset:
         hbisect.resetstate(repo)
         return
 
     state = hbisect.load_state(repo)
 
     # update state
     if good or bad or skip:
         if rev:
             nodes = [repo.lookup(i) for i in scmutil.revrange(repo, [rev])]
         else:
             nodes = [repo.lookup('.')]
         if good:
             state['good'] += nodes
         elif bad:
             state['bad'] += nodes
         elif skip:
             state['skip'] += nodes
         hbisect.save_state(repo, state)
         if not (state['good'] and state['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 = cmdutil.show_changeset(ui, repo, {})
 
     if command:
         changesets = 1
         if noupdate:
             try:
                 node = state['current'][0]
             except LookupError:
                 raise error.Abort(_('current bisect revision is unknown - '
                                    'start a new bisect to fix'))
         else:
             node, p2 = repo.dirstate.parents()
             if p2 != nullid:
                 raise error.Abort(_('current bisect revision is a merge'))
         if rev:
             node = repo[scmutil.revsingle(repo, rev, node)].node()
         try:
             while changesets:
                 # update state
                 state['current'] = [node]
                 hbisect.save_state(repo, state)
                 status = ui.system(command, environ={'HG_NODE': hex(node)},
                                    blockedtag='bisect_check')
                 if status == 125:
                     transition = "skip"
                 elif status == 0:
                     transition = "good"
                 # status < 0 means process was killed
                 elif status == 127:
                     raise error.Abort(_("failed to execute %s") % command)
                 elif status < 0:
                     raise error.Abort(_("%s killed") % command)
                 else:
                     transition = "bad"
                 state[transition].append(node)
                 ctx = repo[node]
                 ui.status(_('changeset %d:%s: %s\n') % (ctx, ctx, transition))
                 hbisect.checkstate(state)
                 # bisect
                 nodes, changesets, bgood = hbisect.bisect(repo.changelog, state)
                 # update to next check
                 node = nodes[0]
                 mayupdate(repo, node, show_stats=False)
         finally:
             state['current'] = [node]
             hbisect.save_state(repo, state)
         hbisect.printresult(ui, repo, state, displayer, nodes, bgood)
         return
 
     hbisect.checkstate(state)
 
     # actually bisect
     nodes, changesets, good = hbisect.bisect(repo.changelog, state)
     if extend:
         if not changesets:
             extendnode = hbisect.extendrange(repo, state, nodes, good)
             if extendnode is not None:
                 ui.write(_("Extending search to changeset %d:%s\n")
                          % (extendnode.rev(), extendnode))
                 state['current'] = [extendnode.node()]
                 hbisect.save_state(repo, state)
                 return mayupdate(repo, extendnode.node())
         raise error.Abort(_("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)
         ui.write(_("Testing changeset %d:%s "
                    "(%d changesets remaining, ~%d tests)\n")
                  % (rev, short(node), changesets, tests))
         state['current'] = [node]
         hbisect.save_state(repo, state)
         return mayupdate(repo, node)
 
 @command('bookmarks|bookmark',
     [('f', 'force', False, _('force')),
     ('r', 'rev', '', _('revision for bookmark action'), _('REV')),
     ('d', 'delete', False, _('delete a given bookmark')),
     ('m', 'rename', '', _('rename a given bookmark'), _('OLD')),
     ('i', 'inactive', False, _('mark a bookmark inactive')),
     ] + formatteropts,
     _('hg bookmarks [OPTIONS]... [NAME]...'))
 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 or -d 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
 
       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 @
     '''
     force = opts.get(r'force')
     rev = opts.get(r'rev')
     delete = opts.get(r'delete')
     rename = opts.get(r'rename')
     inactive = opts.get(r'inactive')
 
     if delete and rename:
         raise error.Abort(_("--delete and --rename are incompatible"))
     if delete and rev:
         raise error.Abort(_("--rev is incompatible with --delete"))
     if rename and rev:
         raise error.Abort(_("--rev is incompatible with --rename"))
     if not names and (delete or rev):
         raise error.Abort(_("bookmark name required"))
 
     if delete or rename or names or inactive:
         with repo.wlock(), repo.lock(), repo.transaction('bookmark') as tr:
             if delete:
                 names = pycompat.maplist(repo._bookmarks.expandname, names)
                 bookmarks.delete(repo, tr, names)
             elif rename:
                 if not names:
                     raise error.Abort(_("new bookmark name required"))
                 elif len(names) > 1:
                     raise error.Abort(_("only one new bookmark name allowed"))
                 rename = repo._bookmarks.expandname(rename)
                 bookmarks.rename(repo, tr, rename, names[0], force, inactive)
             elif names:
                 bookmarks.addbookmarks(repo, tr, names, rev, force, inactive)
             elif inactive:
                 if len(repo._bookmarks) == 0:
                     ui.status(_("no bookmarks set\n"))
                 elif not repo._activebookmark:
                     ui.status(_("no active bookmark\n"))
                 else:
                     bookmarks.deactivate(repo)
     else: # show bookmarks
         bookmarks.printbookmarks(ui, repo, **opts)
 
 @command('branch',
     [('f', 'force', None,
      _('set branch name even if it shadows an existing branch')),
     ('C', 'clean', None, _('reset branch name to parent branch name'))],
     _('[-fC] [NAME]'))
 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)
     if label:
         label = label.strip()
 
     if not opts.get('clean') and not label:
         ui.write("%s\n" % repo.dirstate.branch())
         return
 
     with repo.wlock():
         if opts.get('clean'):
             label = repo[None].p1().branch()
             repo.dirstate.setbranch(label)
             ui.status(_('reset working directory to branch %s\n') % label)
         elif label:
             if not opts.get('force') and label in repo.branchmap():
                 if label not in [p.branch() for p in repo[None].parents()]:
                     raise error.Abort(_('a branch of the same name already'
                                        ' exists'),
                                      # i18n: "it" refers to an existing branch
                                      hint=_("use 'hg update' to switch to it"))
             scmutil.checknewlabel(repo, label, 'branch')
             repo.dirstate.setbranch(label)
             ui.status(_('marked working directory as branch %s\n') % label)
 
             # find any open named branches aside from default
             others = [n for n, h, t, c in repo.branchmap().iterbranches()
                       if n != "default" and not c]
             if not others:
                 ui.status(_('(branches are permanent and global, '
                             'did you want a bookmark?)\n'))
 
 @command('branches',
     [('a', 'active', False,
       _('show only branches that have unmerged heads (DEPRECATED)')),
      ('c', 'closed', False, _('show normal and closed branches')),
     ] + formatteropts,
     _('[-c]'))
 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.
 
     Returns 0.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager('branches')
     fm = ui.formatter('branches', opts)
     hexfunc = fm.hexfunc
 
     allheads = set(repo.heads())
     branches = []
     for tag, heads, tip, isclosed in repo.branchmap().iterbranches():
         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 = 'branches.active'
             notice = ''
         elif not isopen:
             if not closed:
                 continue
             label = 'branches.closed'
             notice = _(' (closed)')
         else:
             label = 'branches.inactive'
             notice = _(' (inactive)')
         current = (tag == repo.dirstate.branch())
         if current:
             label = 'branches.current'
 
         fm.startitem()
         fm.write('branch', '%s', tag, label=label)
         rev = ctx.rev()
         padsize = max(31 - len(str(rev)) - encoding.colwidth(tag), 0)
         fmt = ' ' * padsize + ' %d:%s'
         fm.condwrite(not ui.quiet, 'rev node', fmt, rev, hexfunc(ctx.node()),
                      label='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('\n')
     fm.end()
 
 @command('bundle',
     [('f', 'force', None, _('run even when the destination is unrelated')),
     ('r', 'rev', [], _('a changeset intended to be added to the destination'),
      _('REV')),
     ('b', 'branch', [], _('a specific branch you would like to bundle'),
      _('BRANCH')),
     ('', 'base', [],
      _('a base changeset assumed to be available at the destination'),
      _('REV')),
     ('a', 'all', None, _('bundle all changesets in the repository')),
     ('t', 'type', 'bzip2', _('bundle compression type to use'), _('TYPE')),
     ] + remoteopts,
     _('[-f] [-t BUNDLESPEC] [-a] [-r REV]... [--base REV]... FILE [DEST]'))
 def bundle(ui, repo, fname, dest=None, **opts):
     """create a bundle file
 
     Generate a bundle file containing data to be added to a 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.
 
     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 'rev' in opts:
         revstrings = opts['rev']
         revs = scmutil.revrange(repo, revstrings)
         if revstrings and not revs:
             raise error.Abort(_('no commits to bundle'))
 
     bundletype = opts.get('type', 'bzip2').lower()
     try:
         bcompression, cgversion, params = exchange.parsebundlespec(
                 repo, bundletype, strict=False)
     except error.UnsupportedBundleSpecification as e:
         raise error.Abort(str(e),
                           hint=_("see 'hg help bundlespec' for supported "
                                  "values for --type"))
 
     # Packed bundles are a pseudo bundle format for now.
     if cgversion == 's1':
         raise error.Abort(_('packed bundles cannot be produced by "hg bundle"'),
                           hint=_("use 'hg debugcreatestreamclonebundle'"))
 
     if opts.get('all'):
         if dest:
             raise error.Abort(_("--all is incompatible with specifying "
                                 "a destination"))
         if opts.get('base'):
             ui.warn(_("ignoring --base because --all was specified\n"))
         base = ['null']
     else:
         base = scmutil.revrange(repo, opts.get('base'))
     if cgversion not in changegroup.supportedoutgoingversions(repo):
         raise error.Abort(_("repository does not support bundle version %s") %
                           cgversion)
 
     if base:
         if dest:
             raise error.Abort(_("--base is incompatible with specifying "
                                "a destination"))
         common = [repo.lookup(rev) for rev in base]
         heads = revs and map(repo.lookup, revs) or None
         outgoing = discovery.outgoing(repo, common, heads)
     else:
         dest = ui.expandpath(dest or 'default-push', dest or 'default')
         dest, branches = hg.parseurl(dest, opts.get('branch'))
         other = hg.peer(repo, opts, dest)
         revs, checkout = hg.addbranchrevs(repo, repo, branches, revs)
         heads = revs and map(repo.lookup, revs) or revs
         outgoing = discovery.findcommonoutgoing(repo, other,
                                                 onlyheads=heads,
                                                 force=opts.get('force'),
                                                 portable=True)
 
     if not outgoing.missing:
         scmutil.nochangesfound(ui, repo, not base and outgoing.excluded)
         return 1
 
     if cgversion == '01': #bundle1
         if bcompression is None:
             bcompression = 'UN'
         bversion = 'HG10' + bcompression
         bcompression = None
     elif cgversion in ('02', '03'):
         bversion = 'HG20'
     else:
         raise error.ProgrammingError(
             '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('experimental', 'bundlecomplevel')
     if complevel is not None:
         compopts['level'] = complevel
 
 
     contentopts = {'cg.version': cgversion}
     if repo.ui.configbool('experimental', 'stabilization.bundle-obsmarker'):
         contentopts['obsolescence'] = True
     if repo.ui.configbool('experimental', 'bundle-phases'):
         contentopts['phases'] = True
     bundle2.writenewbundle(ui, repo, 'bundle', fname, bversion, outgoing,
                            contentopts, compression=bcompression,
                            compopts=compopts)
 
 @command('cat',
     [('o', 'output', '',
      _('print output to file with formatted name'), _('FORMAT')),
     ('r', 'rev', '', _('print the given revision'), _('REV')),
     ('', 'decode', None, _('apply any matching decode filter')),
     ] + walkopts + formatteropts,
     _('[OPTION]... FILE...'),
     inferrepo=True)
 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 format string. The formatting rules as follows:
 
     :``%%``: 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
 
     Returns 0 on success.
     """
     ctx = scmutil.revsingle(repo, opts.get('rev'))
     m = scmutil.match(ctx, (file1,) + pats, opts)
     fntemplate = opts.pop('output', '')
     if cmdutil.isstdiofilename(fntemplate):
         fntemplate = ''
 
     if fntemplate:
         fm = formatter.nullformatter(ui, 'cat')
     else:
         ui.pager('cat')
         fm = ui.formatter('cat', opts)
     with fm:
         return cmdutil.cat(ui, repo, ctx, m, fm, fntemplate, '', **opts)
 
 @command('^clone',
     [('U', 'noupdate', None, _('the clone will include an empty working '
                                'directory (only a repository)')),
     ('u', 'updaterev', '', _('revision, tag, or branch to check out'),
         _('REV')),
     ('r', 'rev', [], _('include the specified changeset'), _('REV')),
     ('b', 'branch', [], _('clone only the specified branch'), _('BRANCH')),
     ('', 'pull', None, _('use pull protocol to copy metadata')),
     ('', 'uncompressed', None,
        _('an alias to --stream (DEPRECATED)')),
     ('', 'stream', None,
        _('clone with minimal data processing')),
     ] + remoteopts,
     _('[OPTION]... SOURCE [DEST]'),
     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. When this is done,
       hooks operating on incoming changesets and changegroups may fire twice,
       once for the bundle fetched from the URL and another for any additional
       data not fetched from this URL. 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)
     if opts.get('noupdate') and opts.get('updaterev'):
         raise error.Abort(_("cannot specify both --noupdate and --updaterev"))
 
     r = hg.clone(ui, opts, source, dest,
                  pull=opts.get('pull'),
                  stream=opts.get('stream') or opts.get('uncompressed'),
                  rev=opts.get('rev'),
                  update=opts.get('updaterev') or not opts.get('noupdate'),
                  branch=opts.get('branch'),
                  shareopts=opts.get('shareopts'))
 
     return r is None
 
 @command('^commit|ci',
     [('A', 'addremove', None,
      _('mark new/missing files as added/removed before committing')),
     ('', 'close-branch', None,
      _('mark a branch head as closed')),
     ('', 'amend', None, _('amend the parent of the working directory')),
     ('s', 'secret', None, _('use the secret phase for committing')),
     ('e', 'edit', None, _('invoke editor on commit messages')),
     ('i', 'interactive', None, _('use interactive mode')),
     ] + walkopts + commitopts + commitopts2 + subrepoopts,
     _('[OPTION]... [FILE]...'),
     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
     """
     wlock = lock = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
         return _docommit(ui, repo, *pats, **opts)
     finally:
         release(lock, wlock)
 
 def _docommit(ui, repo, *pats, **opts):
     if opts.get(r'interactive'):
         opts.pop(r'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
 
     opts = pycompat.byteskwargs(opts)
     if opts.get('subrepos'):
         if opts.get('amend'):
             raise error.Abort(_('cannot amend with --subrepos'))
         # Let --subrepos on the command line override config setting.
         ui.setconfig('ui', 'commitsubrepos', True, 'commit')
 
     cmdutil.checkunfinished(repo, commit=True)
 
     branch = repo[None].branch()
     bheads = repo.branchheads(branch)
 
     extra = {}
     if opts.get('close_branch'):
         extra['close'] = 1
 
         if not bheads:
             raise error.Abort(_('can only close branch heads'))
         elif opts.get('amend'):
             if repo[None].parents()[0].p1().branch() != branch and \
                     repo[None].parents()[0].p2().branch() != branch:
                 raise error.Abort(_('can only close branch heads'))
 
     if opts.get('amend'):
         if ui.configbool('ui', 'commitsubrepos'):
             raise error.Abort(_('cannot amend with ui.commitsubrepos enabled'))
 
         old = repo['.']
         if not old.mutable():
             raise error.Abort(_('cannot amend public changesets'))
         if len(repo[None].parents()) > 1:
             raise error.Abort(_('cannot amend while merging'))
         allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
         if not allowunstable and old.children():
             raise error.Abort(_('cannot amend changeset with children'))
 
         # 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)
         if node == old.node():
             ui.status(_("nothing changed\n"))
             return 1
     else:
         def commitfunc(ui, repo, message, match, opts):
             overrides = {}
             if opts.get('secret'):
                 overrides[('phases', 'new-commit')] = 'secret'
 
             baseui = repo.baseui
             with baseui.configoverride(overrides, 'commit'):
                 with ui.configoverride(overrides, 'commit'):
                     editform = cmdutil.mergeeditform(repo[None],
                                                      'commit.normal')
                     editor = cmdutil.getcommiteditor(
                         editform=editform, **pycompat.strkwargs(opts))
                     return repo.commit(message,
                                        opts.get('user'),
                                        opts.get('date'),
                                        match,
                                        editor=editor,
                                        extra=extra)
 
         node = cmdutil.commit(ui, repo, commitfunc, pats, opts)
 
         if not node:
             stat = cmdutil.postcommitstatus(repo, pats, opts)
             if stat[3]:
                 ui.status(_("nothing changed (%d missing files, see "
                             "'hg status')\n") % len(stat[3]))
             else:
                 ui.status(_("nothing changed\n"))
             return 1
 
     cmdutil.commitstatus(repo, node, branch, bheads, opts)
 
 @command('config|showconfig|debugconfig',
     [('u', 'untrusted', None, _('show untrusted configuration options')),
      ('e', 'edit', None, _('edit user config')),
      ('l', 'local', None, _('edit repository config')),
      ('g', 'global', None, _('edit global config'))] + formatteropts,
     _('[-u] [NAME]...'),
     optionalrepo=True)
 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.
 
     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 --debug, the source (filename and line number) is printed
     for each config item.
 
     See :hg:`help config` for more information about config files.
 
     Returns 0 on success, 1 if NAME does not exist.
 
     """
 
     opts = pycompat.byteskwargs(opts)
     if opts.get('edit') or opts.get('local') or opts.get('global'):
         if opts.get('local') and opts.get('global'):
             raise error.Abort(_("can't use --local and --global together"))
 
         if opts.get('local'):
             if not repo:
                 raise error.Abort(_("can't use --local outside a repository"))
             paths = [repo.vfs.join('hgrc')]
         elif opts.get('global'):
             paths = rcutil.systemrcpath()
         else:
             paths = rcutil.userrcpath()
 
         for f in paths:
             if os.path.exists(f):
                 break
         else:
             if opts.get('global'):
                 samplehgrc = uimod.samplehgrcs['global']
             elif opts.get('local'):
                 samplehgrc = uimod.samplehgrcs['local']
             else:
                 samplehgrc = uimod.samplehgrcs['user']
 
             f = paths[0]
             fp = open(f, "wb")
             fp.write(util.tonativeeol(samplehgrc))
             fp.close()
 
         editor = ui.geteditor()
         ui.system("%s \"%s\"" % (editor, f),
                   onerr=error.Abort, errprefix=_("edit failed"),
                   blockedtag='config_edit')
         return
     ui.pager('config')
     fm = ui.formatter('config', opts)
     for t, f in rcutil.rccomponents():
         if t == 'path':
             ui.debug('read config from: %s\n' % f)
         elif t == 'items':
             for section, name, value, source in f:
                 ui.debug('set config by: %s\n' % source)
         else:
             raise error.ProgrammingError('unknown rctype: %s' % t)
     untrusted = bool(opts.get('untrusted'))
     if values:
         sections = [v for v in values if '.' not in v]
         items = [v for v in values if '.' in v]
         if len(items) > 1 or items and sections:
             raise error.Abort(_('only one config item permitted'))
     matched = False
     for section, name, value in ui.walkconfig(untrusted=untrusted):
         source = ui.configsource(section, name, untrusted)
         value = pycompat.bytestr(value)
         if fm.isplain():
             source = source or 'none'
             value = value.replace('\n', '\\n')
         entryname = section + '.' + name
         if values:
             for v in values:
                 if v == section:
                     fm.startitem()
                     fm.condwrite(ui.debugflag, 'source', '%s: ', source)
                     fm.write('name value', '%s=%s\n', entryname, value)
                     matched = True
                 elif v == entryname:
                     fm.startitem()
                     fm.condwrite(ui.debugflag, 'source', '%s: ', source)
                     fm.write('value', '%s\n', value)
                     fm.data(name=entryname)
                     matched = True
         else:
             fm.startitem()
             fm.condwrite(ui.debugflag, 'source', '%s: ', source)
             fm.write('name value', '%s=%s\n', entryname, value)
             matched = True
     fm.end()
     if matched:
         return 0
     return 1
 
 @command('copy|cp',
     [('A', 'after', None, _('record a copy that has already occurred')),
     ('f', 'force', None, _('forcibly copy over an existing managed file')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... [SOURCE]... DEST'))
 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.
 
     This command takes effect with the next commit. To undo a copy
     before that, see :hg:`revert`.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     opts = pycompat.byteskwargs(opts)
     with repo.wlock(False):
         return cmdutil.copy(ui, repo, pats, opts)
 
 @command('debugcommands', [], _('[COMMAND]'), norepo=True)
 def debugcommands(ui, cmd='', *args):
     """list all available commands and options"""
     for cmd, vals in sorted(table.iteritems()):
         cmd = cmd.split('|')[0].strip('^')
         opts = ', '.join([i[1] for i in vals[1]])
         ui.write('%s: %s\n' % (cmd, opts))
 
 @command('debugcomplete',
     [('o', 'options', None, _('show the command options'))],
     _('[-o] CMD'),
     norepo=True)
 def debugcomplete(ui, cmd='', **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 "(DEPRECATED)" in o[3]:
                     continue
                 if o[0]:
                     options.append('-%s' % o[0])
                 options.append('--%s' % o[1])
         ui.write("%s\n" % "\n".join(options))
         return
 
     cmdlist, unused_allcmds = cmdutil.findpossible(cmd, table)
     if ui.verbose:
         cmdlist = [' '.join(c[0]) for c in cmdlist.values()]
     ui.write("%s\n" % "\n".join(sorted(cmdlist)))
 
 @command('^diff',
     [('r', 'rev', [], _('revision'), _('REV')),
     ('c', 'change', '', _('change made by revision'), _('REV'))
     ] + diffopts + diffopts2 + walkopts + subrepoopts,
     _('[OPTION]... ([-c REV] | [-r REV1 [-r REV2]]) [FILE]...'),
     inferrepo=True)
 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.
 
     When two revision arguments are given, then changes are shown
     between those revisions. If only one revision is specified then
     that revision is compared to the working directory, and, when no
     revisions are specified, the working directory files are compared
     to its first parent.
 
     Alternatively you can specify -c/--change with a revision to see
     the changes in that changeset relative to its first parent.
 
     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 -r 1.0:1.2 lib/
 
       - get change stats relative to the last change on some date::
 
           hg diff --stat -r "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 -r 9353^:9353   # same using revset syntax
           hg diff -r 9353^2:9353  # compare against the second parent
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     revs = opts.get('rev')
     change = opts.get('change')
     stat = opts.get('stat')
     reverse = opts.get('reverse')
 
     if revs and change:
         msg = _('cannot specify --rev and --change at the same time')
         raise error.Abort(msg)
     elif change:
         node2 = scmutil.revsingle(repo, change, None).node()
         node1 = repo[node2].p1().node()
     else:
         node1, node2 = scmutil.revpair(repo, revs)
 
     if reverse:
         node1, node2 = node2, node1
 
     diffopts = patch.diffallopts(ui, opts)
     m = scmutil.match(repo[node2], pats, opts)
     ui.pager('diff')
     cmdutil.diffordiffstat(ui, repo, diffopts, node1, node2, m, stat=stat,
                            listsubrepos=opts.get('subrepos'),
                            root=opts.get('root'))
 
 @command('^export',
     [('o', 'output', '',
      _('print output to file with formatted name'), _('FORMAT')),
     ('', 'switch-parent', None, _('diff against the second parent')),
     ('r', 'rev', [], _('revisions to export'), _('REV')),
     ] + diffopts,
     _('[OPTION]... [-o OUTFILESPEC] [-r] [REV]...'))
 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 format string. The formatting rules are as follows:
 
     :``%%``: 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
 
     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.
 
     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
 
       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)
     changesets += tuple(opts.get('rev', []))
     if not changesets:
         changesets = ['.']
     revs = scmutil.revrange(repo, changesets)
     if not revs:
         raise error.Abort(_("export requires at least one changeset"))
     if len(revs) > 1:
         ui.note(_('exporting patches:\n'))
     else:
         ui.note(_('exporting patch:\n'))
     ui.pager('export')
     cmdutil.export(repo, revs, fntemplate=opts.get('output'),
                  switch_parent=opts.get('switch_parent'),
                  opts=patch.diffallopts(ui, opts))
 
 @command('files',
     [('r', 'rev', '', _('search the repository as it is in REV'), _('REV')),
      ('0', 'print0', None, _('end filenames with NUL, for use with xargs')),
     ] + walkopts + formatteropts + subrepoopts,
     _('[OPTION]... [FILE]...'))
 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
 
       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)
     ctx = scmutil.revsingle(repo, opts.get('rev'), None)
 
     end = '\n'
     if opts.get('print0'):
         end = '\0'
     fmt = '%s' + end
 
     m = scmutil.match(ctx, pats, opts)
     ui.pager('files')
     with ui.formatter('files', opts) as fm:
         return cmdutil.files(ui, ctx, m, fm, fmt, opts.get('subrepos'))
 
 @command('^forget', walkopts, _('[OPTION]... FILE...'), 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.Abort(_('no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     rejected = cmdutil.forget(ui, repo, m, prefix="", explicitonly=False)[0]
     return rejected and 1 or 0
 
 @command(
     'graft',
     [('r', 'rev', [], _('revisions to graft'), _('REV')),
      ('c', 'continue', False, _('resume interrupted graft')),
      ('e', 'edit', False, _('invoke editor on commit messages')),
      ('', 'log', None, _('append graft info to log message')),
      ('f', 'force', False, _('force graft')),
      ('D', 'currentdate', False,
       _('record the current date as commit date')),
      ('U', 'currentuser', False,
       _('record the current user as committer'), _('DATE'))]
     + commitopts2 + mergetoolopts  + dryrunopts,
     _('[OPTION]... [-r REV]... REV...'))
 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.
 
     .. note::
 
        The -c/--continue option does not reapply earlier options, except
        for --force.
 
     .. 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)"
 
     See :hg:`help revisions` for more about specifying revisions.
 
     Returns 0 on successful completion.
     '''
     with repo.wlock():
         return _dograft(ui, repo, *revs, **opts)
 
 def _dograft(ui, repo, *revs, **opts):
     opts = pycompat.byteskwargs(opts)
     if revs and opts.get('rev'):
         ui.warn(_('warning: inconsistent use of --rev might give unexpected '
                   'revision ordering!\n'))
 
     revs = list(revs)
     revs.extend(opts.get('rev'))
 
     if not opts.get('user') and opts.get('currentuser'):
         opts['user'] = ui.username()
     if not opts.get('date') and opts.get('currentdate'):
         opts['date'] = "%d %d" % util.makedate()
 
     editor = cmdutil.getcommiteditor(editform='graft',
                                      **pycompat.strkwargs(opts))
 
     cont = False
     if opts.get('continue'):
         cont = True
         if revs:
             raise error.Abort(_("can't specify --continue and revisions"))
         # read in unfinished revisions
         try:
             nodes = repo.vfs.read('graftstate').splitlines()
             revs = [repo[node].rev() for node in nodes]
         except IOError as inst:
             if inst.errno != errno.ENOENT:
                 raise
             cmdutil.wrongtooltocontinue(repo, _('graft'))
     else:
         cmdutil.checkunfinished(repo)
         cmdutil.bailifchanged(repo)
         if not revs:
             raise error.Abort(_('no revisions specified'))
         revs = scmutil.revrange(repo, revs)
 
     skipped = set()
     # check for merges
     for rev in repo.revs('%ld and merge()', revs):
         ui.warn(_('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
 
     # 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')):
         # check for ancestors of dest branch
         crev = repo['.'].rev()
         ancestors = repo.changelog.ancestors([crev], inclusive=True)
         # XXX make this lazy in the future
         # don't mutate while iterating, create a copy
         for rev in list(revs):
             if rev in ancestors:
                 ui.warn(_('skipping ancestor revision %d:%s\n') %
                         (rev, repo[rev]))
                 # XXX remove on list is slow
                 revs.remove(rev)
         if not revs:
             return -1
 
         # analyze revs for earlier grafts
         ids = {}
         for ctx in repo.set("%ld", revs):
             ids[ctx.hex()] = ctx.rev()
             n = ctx.extra().get('source')
             if n:
                 ids[n] = ctx.rev()
 
         # check ancestors for earlier grafts
         ui.debug('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('only(%d,ancestor(%ld))', crev, revs):
             ctx = repo[rev]
             n = ctx.extra().get('source')
             if n in ids:
                 try:
                     r = repo[n].rev()
                 except error.RepoLookupError:
                     r = None
                 if r in revs:
                     ui.warn(_('skipping revision %d:%s '
                               '(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(_('skipping already grafted revision %d:%s '
                                   '(%d:%s also has unknown origin %s)\n')
                                 % (ids[n], repo[ids[n]], rev, ctx, n[:12]))
                     else:
                         ui.warn(_('skipping already grafted revision %d:%s '
                                   '(%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()]
                 ui.warn(_('skipping already grafted revision %d:%s '
                           '(was grafted from %d:%s)\n') %
                         (r, repo[r], rev, ctx))
                 revs.remove(r)
         if not revs:
             return -1
 
     for pos, ctx in enumerate(repo.set("%ld", revs)):
         desc = '%d:%s "%s"' % (ctx.rev(), ctx,
                                ctx.description().split('\n', 1)[0])
         names = repo.nodetags(ctx.node()) + repo.nodebookmarks(ctx.node())
         if names:
             desc += ' (%s)' % ' '.join(names)
         ui.status(_('grafting %s\n') % desc)
         if opts.get('dry_run'):
             continue
 
         source = ctx.extra().get('source')
         extra = {}
         if source:
             extra['source'] = source
             extra['intermediate-source'] = ctx.hex()
         else:
             extra['source'] = ctx.hex()
         user = ctx.user()
         if opts.get('user'):
             user = opts['user']
         date = ctx.date()
         if opts.get('date'):
             date = opts['date']
         message = ctx.description()
         if opts.get('log'):
             message += '\n(grafted from %s)' % ctx.hex()
 
         # we don't merge the first commit when continuing
         if not cont:
             # perform the graft merge with p1(rev) as 'ancestor'
             try:
                 # ui.forcemerge is an internal variable, do not document
                 repo.ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
                                   'graft')
                 stats = mergemod.graft(repo, ctx, ctx.p1(),
                                        ['local', 'graft'])
             finally:
                 repo.ui.setconfig('ui', 'forcemerge', '', 'graft')
             # report any conflicts
             if stats and stats[3] > 0:
                 # write out state for --continue
                 nodelines = [repo[rev].hex() + "\n" for rev in revs[pos:]]
                 repo.vfs.write('graftstate', ''.join(nodelines))
                 extra = ''
                 if opts.get('user'):
                     extra += ' --user %s' % util.shellquote(opts['user'])
                 if opts.get('date'):
                     extra += ' --date %s' % util.shellquote(opts['date'])
                 if opts.get('log'):
                     extra += ' --log'
                 hint=_("use 'hg resolve' and 'hg graft --continue%s'") % extra
                 raise error.Abort(
                     _("unresolved conflicts, can't continue"),
                     hint=hint)
         else:
             cont = False
 
         # commit
         node = repo.commit(text=message, user=user,
                     date=date, extra=extra, editor=editor)
         if node is None:
             ui.warn(
                 _('note: graft of %d:%s created no changes to commit\n') %
                 (ctx.rev(), ctx))
 
     # remove state when we complete successfully
     if not opts.get('dry_run'):
         repo.vfs.unlinkpath('graftstate', ignoremissing=True)
 
     return 0
 
 @command('grep',
     [('0', 'print0', None, _('end fields with NUL')),
     ('', 'all', None, _('print all revisions that match')),
     ('a', 'text', None, _('treat all files as text')),
     ('f', 'follow', None,
      _('follow changeset history,'
        ' or file history across copies and renames')),
     ('i', 'ignore-case', None, _('ignore case when matching')),
     ('l', 'files-with-matches', None,
      _('print only filenames and revisions that match')),
     ('n', 'line-number', None, _('print matching line numbers')),
     ('r', 'rev', [],
      _('only search files changed within revision range'), _('REV')),
     ('u', 'user', None, _('list the author (long with -v)')),
     ('d', 'date', None, _('list the date (short with -q)')),
     ] + formatteropts + walkopts,
     _('[OPTION]... PATTERN [FILE]...'),
     inferrepo=True)
 def grep(ui, repo, pattern, *pats, **opts):
     """search revision history for a pattern in specified files
 
     Search revision history for a regular expression in the specified
     files or the entire project.
 
     By default, grep prints the most recent revision number for each
     file in which it finds a match. To get it to print every revision
     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
     --all flag.
 
     PATTERN can be any Python (roughly Perl-compatible) regular
     expression.
 
     If no FILEs are specified (and -f/--follow isn't set), all files in
     the repository are searched, including those that don't exist in the
     current branch or have been deleted in a prior changeset.
 
     Returns 0 if a match is found, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     reflags = re.M
     if opts.get('ignore_case'):
         reflags |= re.I
     try:
         regexp = util.re.compile(pattern, reflags)
     except re.error as inst:
         ui.warn(_("grep: invalid match pattern: %s\n") % inst)
         return 1
     sep, eol = ':', '\n'
     if opts.get('print0'):
         sep = eol = '\0'
 
     getfile = util.lrucachefunc(repo.file)
 
     def matchlines(body):
         begin = 0
         linenum = 0
         while begin < len(body):
             match = regexp.search(body, begin)
             if not match:
                 break
             mstart, mend = match.span()
             linenum += body.count('\n', begin, mstart) + 1
             lstart = body.rfind('\n', begin, mstart) + 1 or begin
             begin = body.find('\n', mend) + 1 or len(body) + 1
             lend = begin - 1
             yield linenum, mstart - lstart, mend - lstart, body[lstart:lend]
 
     class linestate(object):
         def __init__(self, line, linenum, colstart, colend):
             self.line = line
             self.linenum = linenum
             self.colstart = colstart
             self.colend = colend
 
         def __hash__(self):
             return hash((self.linenum, self.line))
 
         def __eq__(self, other):
             return self.line == other.line
 
         def findpos(self):
             """Iterate all (start, end) indices of matches"""
             yield self.colstart, self.colend
             p = self.colend
             while p < len(self.line):
                 m = regexp.search(self.line, p)
                 if not m:
                     break
                 yield m.span()
                 p = m.end()
 
     matches = {}
     copies = {}
     def grepbody(fn, rev, body):
         matches[rev].setdefault(fn, [])
         m = matches[rev][fn]
         for lnum, cstart, cend, line in matchlines(body):
             s = linestate(line, lnum, cstart, cend)
             m.append(s)
 
     def difflinestates(a, b):
         sm = difflib.SequenceMatcher(None, a, b)
         for tag, alo, ahi, blo, bhi in sm.get_opcodes():
             if tag == 'insert':
                 for i in xrange(blo, bhi):
                     yield ('+', b[i])
             elif tag == 'delete':
                 for i in xrange(alo, ahi):
                     yield ('-', a[i])
             elif tag == 'replace':
                 for i in xrange(alo, ahi):
                     yield ('-', a[i])
                 for i in xrange(blo, bhi):
                     yield ('+', b[i])
 
     def display(fm, fn, ctx, pstates, states):
         rev = ctx.rev()
         if fm.isplain():
             formatuser = ui.shortuser
         else:
             formatuser = str
         if ui.quiet:
             datefmt = '%Y-%m-%d'
         else:
             datefmt = '%a %b %d %H:%M:%S %Y %1%2'
         found = False
         @util.cachefunc
         def binary():
             flog = getfile(fn)
             return util.binary(flog.read(ctx.filenode(fn)))
 
         fieldnamemap = {'filename': 'file', 'linenumber': 'line_number'}
         if opts.get('all'):
             iter = difflinestates(pstates, states)
         else:
             iter = [('', l) for l in states]
         for change, l in iter:
             fm.startitem()
             fm.data(node=fm.hexfunc(ctx.node()))
             cols = [
                 ('filename', fn, True),
                 ('rev', rev, True),
                 ('linenumber', l.linenum, opts.get('line_number')),
             ]
             if opts.get('all'):
                 cols.append(('change', change, True))
             cols.extend([
                 ('user', formatuser(ctx.user()), opts.get('user')),
                 ('date', fm.formatdate(ctx.date(), datefmt), opts.get('date')),
             ])
             lastcol = next(name for name, data, cond in reversed(cols) if cond)
             for name, data, cond in cols:
                 field = fieldnamemap.get(name, name)
                 fm.condwrite(cond, field, '%s', data, label='grep.%s' % name)
                 if cond and name != lastcol:
                     fm.plain(sep, label='grep.sep')
             if not opts.get('files_with_matches'):
                 fm.plain(sep, label='grep.sep')
                 if not opts.get('text') and binary():
                     fm.plain(_(" Binary file matches"))
                 else:
                     displaymatches(fm.nested('texts'), l)
             fm.plain(eol)
             found = True
             if opts.get('files_with_matches'):
                 break
         return found
 
     def displaymatches(fm, l):
         p = 0
         for s, e in l.findpos():
             if p < s:
                 fm.startitem()
                 fm.write('text', '%s', l.line[p:s])
                 fm.data(matched=False)
             fm.startitem()
             fm.write('text', '%s', l.line[s:e], label='grep.match')
             fm.data(matched=True)
             p = e
         if p < len(l.line):
             fm.startitem()
             fm.write('text', '%s', l.line[p:])
             fm.data(matched=False)
         fm.end()
 
     skip = {}
     revfiles = {}
     match = scmutil.match(repo[None], pats, opts)
     found = False
     follow = opts.get('follow')
 
     def prep(ctx, fns):
         rev = ctx.rev()
         pctx = ctx.p1()
         parent = pctx.rev()
         matches.setdefault(rev, {})
         matches.setdefault(parent, {})
         files = revfiles.setdefault(rev, [])
         for fn in fns:
             flog = getfile(fn)
             try:
                 fnode = ctx.filenode(fn)
             except error.LookupError:
                 continue
 
             copied = flog.renamed(fnode)
             copy = follow and copied and copied[0]
             if copy:
                 copies.setdefault(rev, {})[fn] = copy
             if fn in skip:
                 if copy:
                     skip[copy] = True
                 continue
             files.append(fn)
 
             if fn not in matches[rev]:
                 grepbody(fn, rev, flog.read(fnode))
 
             pfn = copy or fn
             if pfn not in matches[parent]:
                 try:
                     fnode = pctx.filenode(pfn)
                     grepbody(pfn, parent, flog.read(fnode))
                 except error.LookupError:
                     pass
 
     ui.pager('grep')
     fm = ui.formatter('grep', opts)
     for ctx in cmdutil.walkchangerevs(repo, match, opts, prep):
         rev = ctx.rev()
         parent = ctx.p1().rev()
         for fn in sorted(revfiles.get(rev, [])):
             states = matches[rev][fn]
             copy = copies.get(rev, {}).get(fn)
             if fn in skip:
                 if copy:
                     skip[copy] = True
                 continue
             pstates = matches.get(parent, {}).get(copy or fn, [])
             if pstates or states:
                 r = display(fm, fn, ctx, pstates, states)
                 found = found or r
                 if r and not opts.get('all'):
                     skip[fn] = True
                     if copy:
                         skip[copy] = True
         del matches[rev]
         del revfiles[rev]
     fm.end()
 
     return not found
 
 @command('heads',
     [('r', 'rev', '',
      _('show only heads which are descendants of STARTREV'), _('STARTREV')),
     ('t', 'topo', False, _('show topological heads only')),
     ('a', 'active', False, _('show active branchheads only (DEPRECATED)')),
     ('c', 'closed', False, _('show normal and closed branch heads')),
     ] + templateopts,
     _('[-ct] [-r STARTREV] [REV]...'))
 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
     if 'rev' in opts:
         start = scmutil.revsingle(repo, opts['rev'], None).node()
 
     if opts.get('topo'):
         heads = [repo[h] for h in repo.heads(start)]
     else:
         heads = []
         for branch in repo.branchmap():
             heads += repo.branchheads(branch, start, opts.get('closed'))
         heads = [repo[h] for h in heads]
 
     if branchrevs:
         branches = set(repo[br].branch() for br in branchrevs)
         heads = [h for h in heads if h.branch() in branches]
 
     if opts.get('active') and branchrevs:
         dagheads = repo.heads(start)
         heads = [h for h in heads if h.node() in dagheads]
 
     if branchrevs:
         haveheads = set(h.branch() for h in heads)
         if branches - haveheads:
             headless = ', '.join(b for b in branches - haveheads)
             msg = _('no open branch heads found on branches %s')
             if opts.get('rev'):
                 msg += _(' (started at %s)') % opts['rev']
             ui.warn((msg + '\n') % headless)
 
     if not heads:
         return 1
 
     ui.pager('heads')
     heads = sorted(heads, key=lambda x: -x.rev())
     displayer = cmdutil.show_changeset(ui, repo, opts)
     for ctx in heads:
         displayer.show(ctx)
     displayer.close()
 
 @command('help',
     [('e', 'extension', None, _('show only help for extensions')),
      ('c', 'command', None, _('show only help for commands')),
      ('k', 'keyword', None, _('show topics matching keyword')),
      ('s', 'system', [], _('show help for specific platform(s)')),
      ],
     _('[-ecks] [TOPIC]'),
     norepo=True)
 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(r'system') or []
     if len(keep) == 0:
         if pycompat.sysplatform.startswith('win'):
             keep.append('windows')
         elif pycompat.sysplatform == 'OpenVMS':
             keep.append('vms')
         elif pycompat.sysplatform == 'plan9':
             keep.append('plan9')
         else:
             keep.append('unix')
             keep.append(pycompat.sysplatform.lower())
     if ui.verbose:
         keep.append('verbose')
 
     commands = sys.modules[__name__]
     formatted = help.formattedhelp(ui, commands, name, keep=keep, **opts)
     ui.pager('help')
     ui.write(formatted)
 
 
 @command('identify|id',
     [('r', 'rev', '',
      _('identify the specified revision'), _('REV')),
     ('n', 'num', None, _('show local revision number')),
     ('i', 'id', None, _('show global revision id')),
     ('b', 'branch', None, _('show branch')),
     ('t', 'tags', None, _('show tags')),
     ('B', 'bookmarks', None, _('show bookmarks')),
     ] + remoteopts + formatteropts,
     _('[-nibtB] [-r REV] [SOURCE]'),
     optionalrepo=True)
 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.
 
     Specifying a path to a repository root or Mercurial bundle will
     cause lookup to operate on that repository/bundle.
 
     .. container:: verbose
 
       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.Abort(_("there is no Mercurial repository here "
                            "(.hg not found)"))
 
     if ui.debugflag:
         hexfunc = hex
     else:
         hexfunc = short
     default = not (num or id or branch or tags or bookmarks)
     output = []
     revs = []
 
     if source:
         source, branches = hg.parseurl(ui.expandpath(source))
         peer = hg.peer(repo or ui, opts, source) # only pass ui when no repo
         repo = peer.local()
         revs, checkout = hg.addbranchrevs(repo, peer, branches, None)
 
     fm = ui.formatter('identify', opts)
     fm.startitem()
 
     if not repo:
         if num or branch or tags:
             raise error.Abort(
                 _("can't query remote revision number, branch, or tags"))
         if not rev and revs:
             rev = revs[0]
         if not rev:
             rev = "tip"
 
         remoterev = peer.lookup(rev)
         hexrev = hexfunc(remoterev)
         if default or id:
             output = [hexrev]
         fm.data(id=hexrev)
 
         def getbms():
             bms = []
 
             if 'bookmarks' in peer.listkeys('namespaces'):
                 hexremoterev = hex(remoterev)
                 bms = [bm for bm, bmr in peer.listkeys('bookmarks').iteritems()
                        if bmr == hexremoterev]
 
             return sorted(bms)
 
         bms = getbms()
         if bookmarks:
             output.extend(bms)
         elif default and not ui.quiet:
             # multiple bookmarks for a single parent separated by '/'
             bm = '/'.join(bms)
             if bm:
                 output.append(bm)
 
         fm.data(node=hex(remoterev))
         fm.data(bookmarks=fm.formatlist(bms, name='bookmark'))
     else:
         ctx = scmutil.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 = ""
             if ctx.dirty(missing=True, merge=False, branch=False):
                 dirty = '+'
             fm.data(dirty=dirty)
 
             hexoutput = [hexfunc(p.node()) for p in parents]
             if default or id:
                 output = ["%s%s" % ('+'.join(hexoutput), dirty)]
             fm.data(id="%s%s" % ('+'.join(hexoutput), dirty))
 
             if num:
                 numoutput = ["%d" % p.rev() for p in parents]
                 output.append("%s%s" % ('+'.join(numoutput), dirty))
 
             fn = fm.nested('parents')
             for p in parents:
                 fn.startitem()
                 fn.data(rev=p.rev())
                 fn.data(node=p.hex())
                 fn.context(ctx=p)
             fn.end()
         else:
             hexoutput = 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 != 'default':
                 output.append("(%s)" % b)
 
             # multiple tags for a single parent separated by '/'
             t = '/'.join(taglist)
             if t:
                 output.append(t)
 
             # multiple bookmarks for a single parent separated by '/'
             bm = '/'.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='tag', sep=':'))
         fm.data(bookmarks=fm.formatlist(ctx.bookmarks(), name='bookmark'))
         fm.context(ctx=ctx)
 
     fm.plain("%s\n" % ' '.join(output))
     fm.end()
 
 @command('import|patch',
     [('p', 'strip', 1,
      _('directory strip option for patch. This has the same '
        'meaning as the corresponding patch option'), _('NUM')),
     ('b', 'base', '', _('base path (DEPRECATED)'), _('PATH')),
     ('e', 'edit', False, _('invoke editor on commit messages')),
     ('f', 'force', None,
      _('skip check for outstanding uncommitted changes (DEPRECATED)')),
     ('', 'no-commit', None,
      _("don't commit, just update the working directory")),
     ('', 'bypass', None,
      _("apply patch without touching the working directory")),
     ('', 'partial', None,
      _('commit even if some hunks fail')),
     ('', 'exact', None,
      _('abort if patch would apply lossily')),
     ('', 'prefix', '',
      _('apply patch to subdirectory'), _('DIR')),
     ('', 'import-branch', None,
      _('use any branch information in patch (implied by --exact)'))] +
     commitopts + commitopts2 + similarityopts,
     _('[OPTION]... PATCH...'))
 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).
     """
 
     opts = pycompat.byteskwargs(opts)
     if not patch1:
         raise error.Abort(_('need at least one patch to import'))
 
     patches = (patch1,) + patches
 
     date = opts.get('date')
     if date:
         opts['date'] = util.parsedate(date)
 
     exact = opts.get('exact')
     update = not opts.get('bypass')
     if not update and opts.get('no_commit'):
         raise error.Abort(_('cannot use --no-commit with --bypass'))
     try:
         sim = float(opts.get('similarity') or 0)
     except ValueError:
         raise error.Abort(_('similarity must be a number'))
     if sim < 0 or sim > 100:
         raise error.Abort(_('similarity must be between 0 and 100'))
     if sim and not update:
         raise error.Abort(_('cannot use --similarity with --bypass'))
     if exact:
         if opts.get('edit'):
             raise error.Abort(_('cannot use --exact with --edit'))
         if opts.get('prefix'):
             raise error.Abort(_('cannot use --exact with --prefix'))
 
     base = opts["base"]
     wlock = dsguard = lock = tr = None
     msgs = []
     ret = 0
 
 
     try:
         wlock = repo.wlock()
 
         if update:
             cmdutil.checkunfinished(repo)
             if (exact or not opts.get('force')):
                 cmdutil.bailifchanged(repo)
 
         if not opts.get('no_commit'):
             lock = repo.lock()
             tr = repo.transaction('import')
         else:
             dsguard = dirstateguard.dirstateguard(repo, 'import')
         parents = repo[None].parents()
         for patchurl in patches:
             if patchurl == '-':
                 ui.status(_('applying patch from stdin\n'))
                 patchfile = ui.fin
                 patchurl = 'stdin'      # for error message
             else:
                 patchurl = os.path.join(base, patchurl)
                 ui.status(_('applying %s\n') % patchurl)
                 patchfile = hg.openpath(ui, patchurl)
 
             haspatch = False
             for hunk in patch.split(patchfile):
                 (msg, node, rej) = cmdutil.tryimportone(ui, repo, hunk,
                                                         parents, opts,
                                                         msgs, hg.clean)
                 if msg:
                     haspatch = True
                     ui.note(msg + '\n')
                 if update or exact:
                     parents = repo[None].parents()
                 else:
                     parents = [repo[node]]
                 if rej:
                     ui.write_err(_("patch applied partially\n"))
                     ui.write_err(_("(fix the .rej files and run "
                                    "`hg commit --amend`)\n"))
                     ret = 1
                     break
 
             if not haspatch:
                 raise error.Abort(_('%s: no diffs found') % patchurl)
 
         if tr:
             tr.close()
         if msgs:
             repo.savecommitmessage('\n* * *\n'.join(msgs))
         if dsguard:
             dsguard.close()
         return ret
     finally:
         if tr:
             tr.release()
         release(lock, dsguard, wlock)
 
 @command('incoming|in',
     [('f', 'force', None,
      _('run even if remote repository is unrelated')),
     ('n', 'newest-first', None, _('show newest record first')),
     ('', 'bundle', '',
      _('file to store the bundles into'), _('FILE')),
     ('r', 'rev', [], _('a remote changeset intended to be added'), _('REV')),
     ('B', 'bookmarks', False, _("compare bookmarks")),
     ('b', 'branch', [],
      _('a specific branch you would like to pull'), _('BRANCH')),
     ] + logopts + remoteopts + subrepoopts,
     _('[-p] [-n] [-M] [-f] [-r REV]... [--bundle FILENAME] [SOURCE]'))
 def incoming(ui, repo, source="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
     if a 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('graph'):
         cmdutil.checkunsupportedgraphflags([], opts)
         def display(other, chlist, displayer):
             revdag = cmdutil.graphrevs(other, chlist, opts)
             cmdutil.displaygraph(ui, repo, revdag, displayer,
                                  graphmod.asciiedges)
 
         hg._incoming(display, lambda: 1, ui, repo, source, opts, buffered=True)
         return 0
 
     if opts.get('bundle') and opts.get('subrepos'):
         raise error.Abort(_('cannot combine --bundle and --subrepos'))
 
     if opts.get('bookmarks'):
         source, branches = hg.parseurl(ui.expandpath(source),
                                        opts.get('branch'))
         other = hg.peer(repo, opts, source)
         if 'bookmarks' not in other.listkeys('namespaces'):
             ui.warn(_("remote doesn't support bookmarks\n"))
             return 0
         ui.pager('incoming')
         ui.status(_('comparing with %s\n') % util.hidepassword(source))
         return bookmarks.incoming(ui, repo, other)
 
     repo._subtoppath = ui.expandpath(source)
     try:
         return hg.incoming(ui, repo, source, opts)
     finally:
         del repo._subtoppath
 
 
 @command('^init', remoteopts, _('[-e CMD] [--remotecmd CMD] [DEST]'),
          norepo=True)
 def init(ui, dest=".", **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)
     hg.peer(ui, opts, ui.expandpath(dest), create=True)
 
 @command('locate',
     [('r', 'rev', '', _('search the repository as it is in REV'), _('REV')),
     ('0', 'print0', None, _('end filenames with NUL, for use with xargs')),
     ('f', 'fullpath', None, _('print complete paths from the filesystem root')),
     ] + walkopts,
     _('[OPTION]... [PATTERN]...'))
 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('print0'):
         end = '\0'
     else:
         end = '\n'
     rev = scmutil.revsingle(repo, opts.get('rev'), None).node()
 
     ret = 1
     ctx = repo[rev]
     m = scmutil.match(ctx, pats, opts, default='relglob',
                       badfn=lambda x, y: False)
 
     ui.pager('locate')
     for abs in ctx.matches(m):
         if opts.get('fullpath'):
             ui.write(repo.wjoin(abs), end)
         else:
             ui.write(((pats and m.rel(abs)) or abs), end)
         ret = 0
 
     return ret
 
 @command('^log|history',
     [('f', 'follow', None,
      _('follow changeset history, or file history across copies and renames')),
     ('', 'follow-first', None,
      _('only follow the first parent of merge changesets (DEPRECATED)')),
     ('d', 'date', '', _('show revisions matching date spec'), _('DATE')),
     ('C', 'copies', None, _('show copied files')),
     ('k', 'keyword', [],
      _('do case-insensitive search for a given text'), _('TEXT')),
     ('r', 'rev', [], _('show the specified revision or revset'), _('REV')),
     ('', 'removed', None, _('include revisions where files were removed')),
     ('m', 'only-merges', None, _('show only merges (DEPRECATED)')),
     ('u', 'user', [], _('revisions committed by user'), _('USER')),
     ('', 'only-branch', [],
      _('show only changesets within the given named branch (DEPRECATED)'),
      _('BRANCH')),
     ('b', 'branch', [],
      _('show changesets within the given named branch'), _('BRANCH')),
     ('P', 'prune', [],
      _('do not display revision or any of its ancestors'), _('REV')),
     ] + logopts + walkopts,
     _('[OPTION]... [FILE]'),
     inferrepo=True)
 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, in which case the working directory parent is
     used as the starting revision.
 
     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 or descendants of the starting revision.
 
     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, 'x' is obsolete,
     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.
 
     .. 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
 
       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"
 
     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 ``ui.logtemplate`` configuration
     setting.
 
     Returns 0 on success.
 
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get('follow') and opts.get('rev'):
         opts['rev'] = [revsetlang.formatspec('reverse(::%lr)', opts.get('rev'))]
         del opts['follow']
 
     if opts.get('graph'):
         return cmdutil.graphlog(ui, repo, pats, opts)
 
     revs, expr, filematcher = cmdutil.getlogrevs(repo, pats, opts)
     limit = cmdutil.loglimit(opts)
     count = 0
 
     getrenamed = None
     if opts.get('copies'):
         endrev = None
         if opts.get('rev'):
             endrev = scmutil.revrange(repo, opts.get('rev')).max() + 1
         getrenamed = templatekw.getrenamedfn(repo, endrev=endrev)
 
     ui.pager('log')
     displayer = cmdutil.show_changeset(ui, repo, opts, buffered=True)
     for rev in revs:
         if count == limit:
             break
         ctx = repo[rev]
         copies = None
         if getrenamed is not None and rev:
             copies = []
             for fn in ctx.files():
                 rename = getrenamed(fn, rev)
                 if rename:
                     copies.append((fn, rename[0]))
         if filematcher:
             revmatchfn = filematcher(ctx.rev())
         else:
             revmatchfn = None
         displayer.show(ctx, copies=copies, matchfn=revmatchfn)
         if displayer.flush(ctx):
             count += 1
 
     displayer.close()
 
 @command('manifest',
     [('r', 'rev', '', _('revision to display'), _('REV')),
      ('', 'all', False, _("list files from all revisions"))]
          + formatteropts,
     _('[-r REV]'))
 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('manifest', opts)
 
     if opts.get('all'):
         if rev or node:
             raise error.Abort(_("can't specify a revision with --all"))
 
         res = []
         prefix = "data/"
         suffix = ".i"
         plen = len(prefix)
         slen = len(suffix)
         with repo.lock():
             for fn, b, size in repo.store.datafiles():
                 if size != 0 and fn[-slen:] == suffix and fn[:plen] == prefix:
                     res.append(fn[plen:-slen])
         ui.pager('manifest')
         for f in res:
             fm.startitem()
             fm.write("path", '%s\n', f)
         fm.end()
         return
 
     if rev and node:
         raise error.Abort(_("please specify just one revision"))
 
     if not node:
         node = rev
 
     char = {'l': '@', 'x': '*', '': ''}
     mode = {'l': '644', 'x': '755', '': '644'}
     ctx = scmutil.revsingle(repo, node)
     mf = ctx.manifest()
     ui.pager('manifest')
     for f in ctx:
         fm.startitem()
         fl = ctx[f].flags()
         fm.condwrite(ui.debugflag, 'hash', '%s ', hex(mf[f]))
         fm.condwrite(ui.verbose, 'mode type', '%s %1s ', mode[fl], char[fl])
         fm.write('path', '%s\n', f)
     fm.end()
 
 @command('^merge',
     [('f', 'force', None,
       _('force a merge including outstanding changes (DEPRECATED)')),
     ('r', 'rev', '', _('revision to merge'), _('REV')),
     ('P', 'preview', None,
      _('review revisions to merge (no merge is performed)'))
      ] + mergetoolopts,
     _('[-P] [[-r] REV]'))
 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 with must be provided.
 
     See :hg:`help resolve` for information on handling file conflicts.
 
     To undo an uncommitted merge, use :hg:`update --clean .` 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)
     if opts.get('rev') and node:
         raise error.Abort(_("please specify just one revision"))
     if not node:
         node = opts.get('rev')
 
     if node:
         node = scmutil.revsingle(repo, node).node()
 
     if not node:
         node = repo[destutil.destmerge(repo)].node()
 
     if opts.get('preview'):
         # find nodes that are ancestors of p2 but not of p1
         p1 = repo.lookup('.')
         p2 = repo.lookup(node)
         nodes = repo.changelog.findmissing(common=[p1], heads=[p2])
 
         displayer = cmdutil.show_changeset(ui, repo, opts)
         for node in nodes:
             displayer.show(repo[node])
         displayer.close()
         return 0
 
     try:
         # ui.forcemerge is an internal variable, do not document
         repo.ui.setconfig('ui', 'forcemerge', opts.get('tool', ''), 'merge')
         force = opts.get('force')
         labels = ['working copy', 'merge rev']
         return hg.merge(repo, node, force=force, mergeforce=force,
                         labels=labels)
     finally:
         ui.setconfig('ui', 'forcemerge', '', 'merge')
 
 @command('outgoing|out',
     [('f', 'force', None, _('run even when the destination is unrelated')),
     ('r', 'rev', [],
      _('a changeset intended to be included in the destination'), _('REV')),
     ('n', 'newest-first', None, _('show newest record first')),
     ('B', 'bookmarks', False, _('compare bookmarks')),
     ('b', 'branch', [], _('a specific branch you would like to push'),
      _('BRANCH')),
     ] + logopts + remoteopts + subrepoopts,
     _('[-M] [-p] [-n] [-f] [-r REV]... [DEST]'))
 def outgoing(ui, repo, dest=None, **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('graph'):
         cmdutil.checkunsupportedgraphflags([], opts)
         o, other = hg._outgoing(ui, repo, dest, opts)
         if not o:
             cmdutil.outgoinghooks(ui, repo, other, opts, o)
             return
 
         revdag = cmdutil.graphrevs(repo, o, opts)
         ui.pager('outgoing')
         displayer = cmdutil.show_changeset(ui, repo, opts, buffered=True)
         cmdutil.displaygraph(ui, repo, revdag, displayer, graphmod.asciiedges)
         cmdutil.outgoinghooks(ui, repo, other, opts, o)
         return 0
 
     if opts.get('bookmarks'):
         dest = ui.expandpath(dest or 'default-push', dest or 'default')
         dest, branches = hg.parseurl(dest, opts.get('branch'))
         other = hg.peer(repo, opts, dest)
         if 'bookmarks' not in other.listkeys('namespaces'):
             ui.warn(_("remote doesn't support bookmarks\n"))
             return 0
         ui.status(_('comparing with %s\n') % util.hidepassword(dest))
         ui.pager('outgoing')
         return bookmarks.outgoing(ui, repo, other)
 
     repo._subtoppath = ui.expandpath(dest or 'default-push', dest or 'default')
     try:
         return hg.outgoing(ui, repo, dest, opts)
     finally:
         del repo._subtoppath
 
 @command('parents',
     [('r', 'rev', '', _('show parents of the specified revision'), _('REV')),
     ] + templateopts,
     _('[-r REV] [FILE]'),
     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)
     ctx = scmutil.revsingle(repo, opts.get('rev'), None)
 
     if file_:
         m = scmutil.match(ctx, (file_,), opts)
         if m.anypats() or len(m.files()) != 1:
             raise error.Abort(_('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.Abort(_("'%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 = cmdutil.show_changeset(ui, repo, opts)
     for n in p:
         if n != nullid:
             displayer.show(repo[n])
     displayer.close()
 
 @command('paths', formatteropts, _('[NAME]'), optionalrepo=True)
 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.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager('paths')
     if search:
         pathitems = [(name, path) for name, path in ui.paths.iteritems()
                      if name == search]
     else:
         pathitems = sorted(ui.paths.iteritems())
 
     fm = ui.formatter('paths', opts)
     if fm.isplain():
         hidepassword = util.hidepassword
     else:
         hidepassword = str
     if ui.quiet:
         namefmt = '%s\n'
     else:
         namefmt = '%s = '
     showsubopts = not search and not ui.quiet
 
     for name, path in pathitems:
         fm.startitem()
         fm.condwrite(not search, 'name', namefmt, name)
         fm.condwrite(not ui.quiet, 'url', '%s\n', hidepassword(path.rawloc))
         for subopt, value in sorted(path.suboptions.items()):
             assert subopt not in ('name', 'url')
             if showsubopts:
                 fm.plain('%s:%s = ' % (name, subopt))
             fm.condwrite(showsubopts, subopt, '%s\n', value)
 
     fm.end()
 
     if search and not pathitems:
         if not ui.quiet:
             ui.warn(_("not found!\n"))
         return 1
     else:
         return 0
 
 @command('phase',
     [('p', 'public', False, _('set changeset phase to public')),
      ('d', 'draft', False, _('set changeset phase to draft')),
      ('s', 'secret', False, _('set changeset phase to secret')),
      ('f', 'force', False, _('allow to move boundary backward')),
      ('r', 'rev', [], _('target revision'), _('REV')),
     ],
     _('[-p|-d|-s] [-f] [-r] [REV...]'))
 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 changeset from a
     lower phase to an 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.phasenames):
         if opts[name]:
             if targetphase is not None:
                 raise error.Abort(_('only one phase can be specified'))
             targetphase = idx
 
     # look for specified revision
     revs = list(revs)
     revs.extend(opts['rev'])
     if not revs:
         # 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()]
 
     revs = scmutil.revrange(repo, revs)
 
     lock = None
     ret = 0
     if targetphase is None:
         # display
         for r in revs:
             ctx = repo[r]
             ui.write('%i: %s\n' % (ctx.rev(), ctx.phasestr()))
     else:
         tr = None
         lock = repo.lock()
         try:
             tr = repo.transaction("phase")
             # set phase
             if not revs:
                 raise error.Abort(_('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['force']:
                 phases.retractboundary(repo, tr, targetphase, nodes)
             tr.close()
         finally:
             if tr is not None:
                 tr.release()
             lock.release()
         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(_('cannot move %i changesets to a higher '
                       'phase, use --force\n') % len(rejected))
             ret = 1
         if changes:
             msg = _('phase changed for %i changesets\n') % changes
             if ret:
                 ui.status(msg)
             else:
                 ui.note(msg)
         else:
             ui.warn(_('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
     """
     if modheads == 0:
         return
     if optupdate:
         try:
             return hg.updatetotally(ui, repo, checkout, brev)
         except error.UpdateAbort as inst:
             msg = _("not updating: %s") % str(inst)
             hint = inst.hint
             raise error.UpdateAbort(msg, hint=hint)
     if modheads > 1:
         currentbranchheads = len(repo.branchheads())
         if currentbranchheads == modheads:
             ui.status(_("(run 'hg heads' to see heads, 'hg merge' to merge)\n"))
         elif currentbranchheads > 1:
             ui.status(_("(run 'hg heads .' to see heads, 'hg merge' to "
                         "merge)\n"))
         else:
             ui.status(_("(run 'hg heads' to see heads)\n"))
     elif not ui.configbool('commands', 'update.requiredest'):
         ui.status(_("(run 'hg update' to get a working copy)\n"))
 
 @command('^pull',
     [('u', 'update', None,
      _('update to new branch head if changesets were pulled')),
     ('f', 'force', None, _('run even when remote repository is unrelated')),
     ('r', 'rev', [], _('a remote changeset intended to be added'), _('REV')),
     ('B', 'bookmark', [], _("bookmark to pull"), _('BOOKMARK')),
     ('b', 'branch', [], _('a specific branch you would like to pull'),
      _('BRANCH')),
     ] + remoteopts,
     _('[-u] [-f] [-r REV]... [-e CMD] [--remotecmd CMD] [SOURCE]'))
 def pull(ui, repo, source="default", **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.
 
     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.
 
     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('commands', 'update.requiredest') and opts.get('update'):
         msg = _('update destination required by configuration')
         hint = _('use hg pull followed by hg update DEST')
         raise error.Abort(msg, hint=hint)
 
     source, branches = hg.parseurl(ui.expandpath(source), opts.get('branch'))
     ui.status(_('pulling from %s\n') % util.hidepassword(source))
     other = hg.peer(repo, opts, source)
     try:
         revs, checkout = hg.addbranchrevs(repo, other, branches,
                                           opts.get('rev'))
 
 
         pullopargs = {}
         if opts.get('bookmark'):
             if not revs:
                 revs = []
             # The list of bookmark used here is not the one used to actually
             # update the bookmark name. This can result in the revision pulled
             # not ending up with the name of the bookmark because of a race
             # condition on the server. (See issue 4689 for details)
             remotebookmarks = other.listkeys('bookmarks')
             pullopargs['remotebookmarks'] = remotebookmarks
             for b in opts['bookmark']:
                 b = repo._bookmarks.expandname(b)
                 if b not in remotebookmarks:
                     raise error.Abort(_('remote bookmark %s not found!') % b)
                 revs.append(remotebookmarks[b])
 
         if revs:
             try:
                 # When 'rev' is a bookmark name, we cannot guarantee that it
                 # will be updated with that name because of a race condition
                 # server side. (See issue 4689 for details)
                 oldrevs = revs
                 revs = [] # actually, nodes
                 for r in oldrevs:
                     node = other.lookup(r)
                     revs.append(node)
                     if r == checkout:
                         checkout = node
             except error.CapabilityError:
                 err = _("other repository doesn't support revision lookup, "
                         "so a rev cannot be specified.")
                 raise error.Abort(err)
 
         pullopargs.update(opts.get('opargs', {}))
         modheads = exchange.pull(repo, other, heads=revs,
                                  force=opts.get('force'),
                                  bookmarks=opts.get('bookmark', ()),
                                  opargs=pullopargs).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 = str(repo.changelog.rev(checkout))
 
             # order below depends on implementation of
             # hg.addbranchrevs(). opts['bookmark'] is ignored,
             # because 'checkout' is determined without it.
             if opts.get('rev'):
                 brev = opts['rev'][0]
             elif opts.get('branch'):
                 brev = opts['branch'][0]
             else:
                 brev = branches[0]
         repo._subtoppath = source
         try:
             ret = postincoming(ui, repo, modheads, opts.get('update'),
                                checkout, brev)
 
         finally:
             del repo._subtoppath
 
     finally:
         other.close()
     return ret
 
 @command('^push',
     [('f', 'force', None, _('force push')),
     ('r', 'rev', [],
      _('a changeset intended to be included in the destination'),
      _('REV')),
     ('B', 'bookmark', [], _("bookmark to push"), _('BOOKMARK')),
     ('b', 'branch', [],
      _('a specific branch you would like to push'), _('BRANCH')),
     ('', 'new-branch', False, _('allow pushing a new branch')),
     ('', 'pushvars', [], _('variables that can be sent to server (ADVANCED)')),
     ] + remoteopts,
     _('[-f] [-r REV]... [-e CMD] [--remotecmd CMD] [DEST]'))
 def push(ui, repo, dest=None, **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.
 
     Please see :hg:`help urls` for important details about ``ssh://``
     URLs. If DESTINATION is omitted, a default path will be used.
 
     .. 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('bookmark'):
         ui.setconfig('bookmarks', 'pushing', opts['bookmark'], 'push')
         for b in opts['bookmark']:
             # translate -B options to -r so changesets get pushed
             b = repo._bookmarks.expandname(b)
             if b in repo._bookmarks:
                 opts.setdefault('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('rev', []).append("null")
 
     path = ui.paths.getpath(dest, default=('default-push', 'default'))
     if not path:
         raise error.Abort(_('default repository not configured!'),
                          hint=_("see 'hg help config.paths'"))
     dest = path.pushloc or path.loc
     branches = (path.branch, opts.get('branch') or [])
     ui.status(_('pushing to %s\n') % util.hidepassword(dest))
     revs, checkout = hg.addbranchrevs(repo, repo, branches, opts.get('rev'))
     other = hg.peer(repo, opts, dest)
 
     if revs:
         revs = [repo.lookup(r) for r in scmutil.revrange(repo, revs)]
         if not revs:
             raise error.Abort(_("specified revisions evaluate to an empty set"),
                              hint=_("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('heads(%r)', path.pushrev)
         revs = scmutil.revrange(repo, [expr])
         revs = [repo[rev].node() for rev in revs]
         if not revs:
             raise error.Abort(_('default push revset for path evaluates to an '
                                 'empty set'))
 
     repo._subtoppath = dest
     try:
         # push subrepos depth-first for coherent ordering
         c = repo['']
         subs = c.substate # only repos that are committed
         for s in sorted(subs):
             result = c.sub(s).push(opts)
             if result == 0:
                 return not result
     finally:
         del repo._subtoppath
 
     opargs = dict(opts.get('opargs', {})) # copy opargs since we may mutate it
     opargs.setdefault('pushvars', []).extend(opts.get('pushvars', []))
 
     pushop = exchange.push(repo, other, opts.get('force'), revs=revs,
                            newbranch=opts.get('new_branch'),
                            bookmarks=opts.get('bookmark', ()),
                            opargs=opargs)
 
     result = not pushop.cgresult
 
     if pushop.bkresult is not None:
         if pushop.bkresult == 2:
             result = 2
         elif not result and pushop.bkresult:
             result = 2
 
     return result
 
 @command('recover', [])
 def recover(ui, repo):
     """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.
     """
     if repo.recover():
         return hg.verify(repo)
     return 1
 
 @command('^remove|rm',
     [('A', 'after', None, _('record delete for missing files')),
     ('f', 'force', None,
      _('forget added files, delete modified files')),
     ] + subrepoopts + walkopts,
     _('[OPTION]... FILE...'),
     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('after'), opts.get('force')
     if not pats and not after:
         raise error.Abort(_('no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     subrepos = opts.get('subrepos')
     return cmdutil.remove(ui, repo, m, "", after, force, subrepos)
 
 @command('rename|move|mv',
     [('A', 'after', None, _('record a rename that has already occurred')),
     ('f', 'force', None, _('forcibly copy over an existing managed file')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... SOURCE... DEST'))
 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.
 
     This command takes effect at the next commit. To undo a rename
     before that, see :hg:`revert`.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     opts = pycompat.byteskwargs(opts)
     with repo.wlock(False):
         return cmdutil.copy(ui, repo, pats, opts, rename=True)
 
 @command('resolve',
     [('a', 'all', None, _('select all unresolved files')),
     ('l', 'list', None, _('list state of files needing merge')),
     ('m', 'mark', None, _('mark files as resolved')),
     ('u', 'unmark', None, _('mark files as unresolved')),
     ('n', 'no-status', None, _('hide status prefix'))]
     + mergetoolopts + walkopts + formatteropts,
     _('[OPTION]... [FILE]...'),
     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 [--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.
 
     Returns 0 on success, 1 if any files fail a resolve attempt.
     """
 
     opts = pycompat.byteskwargs(opts)
     flaglist = 'all mark unmark list no_status'.split()
     all, mark, unmark, show, nostatus = \
         [opts.get(o) for o in flaglist]
 
     if (show and (mark or unmark)) or (mark and unmark):
         raise error.Abort(_("too many options specified"))
     if pats and all:
         raise error.Abort(_("can't specify --all and patterns"))
     if not (all or pats or show or mark or unmark):
         raise error.Abort(_('no files or directories specified'),
                          hint=('use --all to re-merge all unresolved files'))
 
     if show:
         ui.pager('resolve')
         fm = ui.formatter('resolve', opts)
         ms = mergemod.mergestate.read(repo)
         m = scmutil.match(repo[None], pats, opts)
         for f in ms:
             if not m(f):
                 continue
             l = 'resolve.' + {'u': 'unresolved', 'r': 'resolved',
                               'd': 'driverresolved'}[ms[f]]
             fm.startitem()
             fm.condwrite(not nostatus, 'status', '%s ', ms[f].upper(), label=l)
             fm.write('path', '%s\n', f, label=l)
         fm.end()
         return 0
 
     with repo.wlock():
         ms = mergemod.mergestate.read(repo)
 
         if not (ms.active() or repo.dirstate.p2() != nullid):
             raise error.Abort(
                 _('resolve command not applicable when not merging'))
 
         wctx = repo[None]
 
         if ms.mergedriver and ms.mdstate() == 'u':
             proceed = mergemod.driverpreprocess(repo, ms, wctx)
             ms.commit()
             # allow mark and unmark to go through
             if not mark and not unmark and not proceed:
                 return 1
 
         m = scmutil.match(wctx, pats, opts)
         ret = 0
         didwork = False
         runconclude = False
 
         tocomplete = []
         for f in ms:
             if not m(f):
                 continue
 
             didwork = True
 
             # don't let driver-resolved files be marked, and run the conclude
             # step if asked to resolve
             if ms[f] == "d":
                 exact = m.exact(f)
                 if mark:
                     if exact:
                         ui.warn(_('not marking %s as it is driver-resolved\n')
                                 % f)
                 elif unmark:
                     if exact:
                         ui.warn(_('not unmarking %s as it is driver-resolved\n')
                                 % f)
                 else:
                     runconclude = True
                 continue
 
             if mark:
                 ms.mark(f, "r")
             elif unmark:
                 ms.mark(f, "u")
             else:
                 # backup pre-resolve (merge uses .orig for its own purposes)
                 a = repo.wjoin(f)
                 try:
                     util.copyfile(a, a + ".resolve")
                 except (IOError, OSError) as inst:
                     if inst.errno != errno.ENOENT:
                         raise
 
                 try:
                     # preresolve file
                     ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
                                  'resolve')
                     complete, r = ms.preresolve(f, wctx)
                     if not complete:
                         tocomplete.append(f)
                     elif r:
                         ret = 1
                 finally:
                     ui.setconfig('ui', 'forcemerge', '', 'resolve')
                     ms.commit()
 
                 # replace filemerge's .orig file with our resolve file, but only
                 # for merges that are complete
                 if complete:
                     try:
                         util.rename(a + ".resolve",
                                     scmutil.origpath(ui, repo, a))
                     except OSError as inst:
                         if inst.errno != errno.ENOENT:
                             raise
 
         for f in tocomplete:
             try:
                 # resolve file
                 ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
                              'resolve')
                 r = ms.resolve(f, wctx)
                 if r:
                     ret = 1
             finally:
                 ui.setconfig('ui', 'forcemerge', '', 'resolve')
                 ms.commit()
 
             # replace filemerge's .orig file with our resolve file
             a = repo.wjoin(f)
             try:
                 util.rename(a + ".resolve", scmutil.origpath(ui, repo, a))
             except OSError as inst:
                 if inst.errno != errno.ENOENT:
                     raise
 
         ms.commit()
         ms.recordactions()
 
         if not didwork and pats:
             hint = None
             if not any([p for p in pats if p.find(':') >= 0]):
                 pats = ['path:%s' % p for p in pats]
                 m = scmutil.match(wctx, pats, opts)
                 for f in ms:
                     if not m(f):
                         continue
                     flags = ''.join(['-%s ' % o[0] for o in flaglist
                                                    if opts.get(o)])
                     hint = _("(try: hg resolve %s%s)\n") % (
                              flags,
                              ' '.join(pats))
                     break
             ui.warn(_("arguments do not match paths that need resolving\n"))
             if hint:
                 ui.warn(hint)
         elif ms.mergedriver and ms.mdstate() != 's':
             # run conclude step when either a driver-resolved file is requested
             # or there are no driver-resolved files
             # we can't use 'ret' to determine whether any files are unresolved
             # because we might not have tried to resolve some
             if ((runconclude or not list(ms.driverresolved()))
                 and not list(ms.unresolved())):
                 proceed = mergemod.driverconclude(repo, ms, wctx)
                 ms.commit()
                 if not proceed:
                     return 1
 
     # Nudge users into finishing an unfinished operation
     unresolvedf = list(ms.unresolved())
     driverresolvedf = list(ms.driverresolved())
     if not unresolvedf and not driverresolvedf:
         ui.status(_('(no more unresolved files)\n'))
         cmdutil.checkafterresolved(repo)
     elif not unresolvedf:
         ui.status(_('(no more unresolved files -- '
                     'run "hg resolve --all" to conclude)\n'))
 
     return ret
 
 @command('revert',
     [('a', 'all', None, _('revert all changes when no arguments given')),
     ('d', 'date', '', _('tipmost revision matching date'), _('DATE')),
     ('r', 'rev', '', _('revert to the specified revision'), _('REV')),
     ('C', 'no-backup', None, _('do not save backup copies of files')),
     ('i', 'interactive', None,
             _('interactively select the changes (EXPERIMENTAL)')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... [-r REV] [NAME]...'))
 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:`update --clean .`.
 
     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.
     """
 
     if opts.get("date"):
         if opts.get("rev"):
             raise error.Abort(_("you can't specify a revision and a date"))
         opts["rev"] = cmdutil.finddate(ui, repo, opts["date"])
 
     parent, p2 = repo.dirstate.parents()
     if not opts.get('rev') and p2 != nullid:
         # revert after merge is a trap for new users (issue2915)
         raise error.Abort(_('uncommitted merge with no revision specified'),
                          hint=_("use 'hg update' or see 'hg help revert'"))
 
     ctx = scmutil.revsingle(repo, opts.get('rev'))
 
     if (not (pats or opts.get('include') or opts.get('exclude') or
              opts.get('all') or opts.get('interactive'))):
         msg = _("no files or directories specified")
         if p2 != nullid:
             hint = _("uncommitted merge, use --all to discard all changes,"
                      " or 'hg update -C .' to abort the merge")
             raise error.Abort(msg, hint=hint)
         dirty = any(repo.status())
         node = ctx.node()
         if node != parent:
             if dirty:
                 hint = _("uncommitted changes, use --all to discard all"
                          " changes, or 'hg update %s' to update") % ctx.rev()
             else:
                 hint = _("use --all to revert all files,"
                          " or 'hg update %s' to update") % ctx.rev()
         elif dirty:
             hint = _("uncommitted changes, use --all to discard all changes")
         else:
             hint = _("use --all to revert all files")
         raise error.Abort(msg, hint=hint)
 
     return cmdutil.revert(ui, repo, ctx, (parent, p2), *pats, **opts)
 
 @command('rollback', dryrunopts +
          [('f', 'force', False, _('ignore safety measures'))])
 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('ui', 'rollback'):
         raise error.Abort(_('rollback is disabled because it is unsafe'),
                           hint=('see `hg help -v rollback` for information'))
     return repo.rollback(dryrun=opts.get(r'dry_run'),
                          force=opts.get(r'force'))
 
 @command('root', [])
 def root(ui, repo):
     """print the root (top) of the current working directory
 
     Print the root directory of the current repository.
 
     Returns 0 on success.
     """
     ui.write(repo.root + "\n")
 
 @command('^serve',
     [('A', 'accesslog', '', _('name of access log file to write to'),
      _('FILE')),
     ('d', 'daemon', None, _('run server in background')),
     ('', 'daemon-postexec', [], _('used internally by daemon mode')),
     ('E', 'errorlog', '', _('name of error log file to write to'), _('FILE')),
     # use string type, then we can check if something was passed
     ('p', 'port', '', _('port to listen on (default: 8000)'), _('PORT')),
     ('a', 'address', '', _('address to listen on (default: all interfaces)'),
      _('ADDR')),
     ('', 'prefix', '', _('prefix path to serve from (default: server root)'),
      _('PREFIX')),
     ('n', 'name', '',
      _('name to show in web pages (default: working directory)'), _('NAME')),
     ('', 'web-conf', '',
      _("name of the hgweb config file (see 'hg help hgweb')"), _('FILE')),
     ('', 'webdir-conf', '', _('name of the hgweb config file (DEPRECATED)'),
      _('FILE')),
     ('', 'pid-file', '', _('name of file to write process ID to'), _('FILE')),
     ('', 'stdio', None, _('for remote clients (ADVANCED)')),
     ('', 'cmdserver', '', _('for remote clients (ADVANCED)'), _('MODE')),
     ('t', 'templates', '', _('web templates to use'), _('TEMPLATE')),
     ('', 'style', '', _('template style to use'), _('STYLE')),
     ('6', 'ipv6', None, _('use IPv6 in addition to IPv4')),
     ('', 'certificate', '', _('SSL certificate file'), _('FILE'))]
      + subrepoopts,
     _('[OPTION]...'),
     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.
     """
 
     opts = pycompat.byteskwargs(opts)
     if opts["stdio"] and opts["cmdserver"]:
         raise error.Abort(_("cannot use --stdio with --cmdserver"))
 
     if opts["stdio"]:
         if repo is None:
             raise error.RepoError(_("there is no Mercurial repository here"
                                     " (.hg not found)"))
         s = sshserver.sshserver(ui, repo)
         s.serve_forever()
 
     service = server.createservice(ui, repo, opts)
     return server.runservice(opts, initfn=service.init, runfn=service.run)
 
 @command('^status|st',
     [('A', 'all', None, _('show status of all files')),
     ('m', 'modified', None, _('show only modified files')),
     ('a', 'added', None, _('show only added files')),
     ('r', 'removed', None, _('show only removed files')),
     ('d', 'deleted', None, _('show only deleted (but tracked) files')),
     ('c', 'clean', None, _('show only files without changes')),
     ('u', 'unknown', None, _('show only unknown (not tracked) files')),
     ('i', 'ignored', None, _('show only ignored files')),
     ('n', 'no-status', None, _('hide status prefix')),
     ('t', 'terse', '', _('show the terse output (EXPERIMENTAL)')),
     ('C', 'copies', None, _('show source of copied files')),
     ('0', 'print0', None, _('end filenames with NUL, for use with xargs')),
     ('', 'rev', [], _('show difference from revision'), _('REV')),
     ('', 'change', '', _('list the changed files of a revision'), _('REV')),
     ] + walkopts + subrepoopts + formatteropts,
     _('[OPTION]... [FILE]...'),
     inferrepo=True)
 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 directory name
       if all the files in it share the same status. The option expects a value
       which can be a string formed by using 'm', 'a', 'r', 'd', 'u', 'i', 'c'
       where, 'm' stands for 'modified', 'a' for 'added', 'r' for 'removed',
       'd' for 'deleted', 'u' for 'unknown', 'i' for 'ignored' and 'c' for clean.
 
       It terses the output of only those status which are passed. The ignored
       files are not considered while tersing until 'i' is there in --terse value
       or the --ignored option is used.
 
       --verbose option shows more context about the state of the repo
       like the repository is in unfinised merge, shelve, rebase state etc.
       You can have this behaviour turned on by default by following config:
 
       [commands]
       status.verbose = true
 
       You can also skip some states like bisect by adding following in
       configuration file.
 
       [commands]
       status.skipstates = bisect
 
       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
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     revs = opts.get('rev')
     change = opts.get('change')
     terse = opts.get('terse')
 
     if revs and change:
         msg = _('cannot specify --rev and --change at the same time')
         raise error.Abort(msg)
     elif revs and terse:
         msg = _('cannot use --terse with --rev')
         raise error.Abort(msg)
     elif change:
         node2 = scmutil.revsingle(repo, change, None).node()
         node1 = repo[node2].p1().node()
     else:
         node1, node2 = scmutil.revpair(repo, revs)
 
     if pats or ui.configbool('commands', 'status.relative'):
         cwd = repo.getcwd()
     else:
         cwd = ''
 
     if opts.get('print0'):
         end = '\0'
     else:
         end = '\n'
     copy = {}
     states = 'modified added removed deleted unknown ignored clean'.split()
     show = [k for k in states if opts.get(k)]
     if opts.get('all'):
         show += ui.quiet and (states[:4] + ['clean']) or states
 
     if not show:
         if ui.quiet:
             show = states[:4]
         else:
             show = states[:5]
 
     m = scmutil.match(repo[node2], pats, opts)
     stat = repo.status(node1, node2, m,
                        'ignored' in show, 'clean' in show, 'unknown' in show,
                        opts.get('subrepos'))
     if terse:
         stat = cmdutil.tersestatus(repo.root, stat, terse,
                                     repo.dirstate._ignore, opts.get('ignored'))
     changestates = zip(states, pycompat.iterbytestr('MAR!?IC'), stat)
 
     if (opts.get('all') or opts.get('copies')
         or ui.configbool('ui', 'statuscopies')) and not opts.get('no_status'):
         copy = copies.pathcopies(repo[node1], repo[node2], m)
 
     ui.pager('status')
     fm = ui.formatter('status', opts)
     fmt = '%s' + end
     showchar = not opts.get('no_status')
 
     for state, char, files in changestates:
         if state in show:
             label = 'status.' + state
             for f in files:
                 fm.startitem()
                 fm.condwrite(showchar, 'status', '%s ', char, label=label)
                 fm.write('path', fmt, repo.pathto(f, cwd), label=label)
                 if f in copy:
                     fm.write("copy", '  %s' + end, repo.pathto(copy[f], cwd),
                              label='status.copied')
 
     if ((ui.verbose or ui.configbool('commands', 'status.verbose'))
         and not ui.plain()):
         cmdutil.morestatus(repo, fm)
     fm.end()
 
 @command('^summary|sum',
     [('', 'remote', None, _('check for push and pull'))], '[--remote]')
 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('summary')
     ctx = repo[None]
     parents = ctx.parents()
     pnode = parents[0].node()
     marks = []
 
     ms = None
     try:
         ms = mergemod.mergestate.read(repo)
     except error.UnsupportedMergeRecords as e:
         s = ' '.join(e.recordtypes)
         ui.warn(
             _('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(_('parent: %d:%s ') % (p.rev(), p),
                  label=cmdutil._changesetlabels(p))
         ui.write(' '.join(p.tags()), label='log.tag')
         if p.bookmarks():
             marks.extend(p.bookmarks())
         if p.rev() == -1:
             if not len(repo):
                 ui.write(_(' (empty repository)'))
             else:
                 ui.write(_(' (no revision checked out)'))
         if p.obsolete():
             ui.write(_(' (obsolete)'))
         if p.isunstable():
             instabilities = (ui.label(instability, 'trouble.%s' % instability)
                              for instability in p.instabilities())
             ui.write(' ('
                      + ', '.join(instabilities)
                      + ')')
         ui.write('\n')
         if p.description():
             ui.status(' ' + p.description().splitlines()[0].strip() + '\n',
                       label='log.summary')
 
     branch = ctx.branch()
     bheads = repo.branchheads(branch)
     # i18n: column positioning for "hg summary"
     m = _('branch: %s\n') % branch
     if branch != 'default':
         ui.write(m, label='log.branch')
     else:
         ui.status(m, label='log.branch')
 
     if marks:
         active = repo._activebookmark
         # i18n: column positioning for "hg summary"
         ui.write(_('bookmarks:'), label='log.bookmark')
         if active is not None:
             if active in marks:
                 ui.write(' *' + active, label=bookmarks.activebookmarklabel)
                 marks.remove(active)
             else:
                 ui.write(' [%s]' % active, label=bookmarks.activebookmarklabel)
         for m in marks:
             ui.write(' ' + m, label='log.bookmark')
         ui.write('\n', label='log.bookmark')
 
     status = repo.status(unknown=True)
 
     c = repo.dirstate.copies()
     copied, renamed = [], []
     for d, s in c.iteritems():
         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(_('%d modified'), 'status.modified'), status.modified),
               (ui.label(_('%d added'), 'status.added'), status.added),
               (ui.label(_('%d removed'), 'status.removed'), status.removed),
               (ui.label(_('%d renamed'), 'status.copied'), renamed),
               (ui.label(_('%d copied'), 'status.copied'), copied),
               (ui.label(_('%d deleted'), 'status.deleted'), status.deleted),
               (ui.label(_('%d unknown'), 'status.unknown'), status.unknown),
               (ui.label(_('%d unresolved'), 'resolve.unresolved'), unresolved),
               (ui.label(_('%d subrepos'), 'status.modified'), subs)]
     t = []
     for l, s in labels:
         if s:
             t.append(l % len(s))
 
     t = ', '.join(t)
     cleanworkdir = False
 
     if repo.vfs.exists('graftstate'):
         t += _(' (graft in progress)')
     if repo.vfs.exists('updatestate'):
         t += _(' (interrupted update)')
     elif len(parents) > 1:
         t += _(' (merge)')
     elif branch != parents[0].branch():
         t += _(' (new branch)')
     elif (parents[0].closesbranch() and
           pnode in repo.branchheads(branch, closed=True)):
         t += _(' (head closed)')
     elif not (status.modified or status.added or status.removed or renamed or
               copied or subs):
         t += _(' (clean)')
         cleanworkdir = True
     elif pnode not in bheads:
         t += _(' (new branch head)')
 
     if parents:
         pendingphase = max(p.phase() for p in parents)
     else:
         pendingphase = phases.public
 
     if pendingphase > phases.newcommitphase(ui):
         t += ' (%s)' % phases.phasenames[pendingphase]
 
     if cleanworkdir:
         # i18n: column positioning for "hg summary"
         ui.status(_('commit: %s\n') % t.strip())
     else:
         # i18n: column positioning for "hg summary"
         ui.write(_('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(_('update: (current)\n'))
     elif pnode not in bheads:
         # i18n: column positioning for "hg summary"
         ui.write(_('update: %d new changesets (update)\n') % new)
     else:
         # i18n: column positioning for "hg summary"
         ui.write(_('update: %d new changesets, %d branch heads (merge)\n') %
                  (new, len(bheads)))
 
     t = []
     draft = len(repo.revs('draft()'))
     if draft:
         t.append(_('%d draft') % draft)
     secret = len(repo.revs('secret()'))
     if secret:
         t.append(_('%d secret') % secret)
 
     if draft or secret:
         ui.status(_('phases: %s\n') % ', '.join(t))
 
     if obsolete.isenabled(repo, obsolete.createmarkersopt):
         for trouble in ("orphan", "contentdivergent", "phasedivergent"):
             numtrouble = len(repo.revs(trouble + "()"))
             # We write all the possibilities to ease translation
             troublemsg = {
                "orphan": _("orphan: %d changesets"),
                "contentdivergent": _("content-divergent: %d changesets"),
                "phasedivergent": _("phase-divergent: %d changesets"),
             }
             if numtrouble > 0:
                 ui.status(troublemsg[trouble] % numtrouble + "\n")
 
     cmdutil.summaryhooks(ui, repo)
 
     if opts.get('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():
         source, branches = hg.parseurl(ui.expandpath('default'))
         sbranch = branches[0]
         try:
             other = hg.peer(repo, {}, source)
         except error.RepoError:
             if opts.get('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('comparing with %s\n' % util.hidepassword(source))
         repo.ui.pushbuffer()
         commoninc = discovery.findcommonincoming(repo, other, heads=revs)
         repo.ui.popbuffer()
         return source, sbranch, other, commoninc, commoninc[1]
 
     if needsincoming:
         source, sbranch, sother, commoninc, incoming = getincoming()
     else:
         source = sbranch = sother = commoninc = incoming = None
 
     def getoutgoing():
         dest, branches = hg.parseurl(ui.expandpath('default-push', 'default'))
         dbranch = branches[0]
         revs, checkout = hg.addbranchrevs(repo, repo, branches, None)
         if source != dest:
             try:
                 dother = hg.peer(repo, {}, dest)
             except error.RepoError:
                 if opts.get('remote'):
                     raise
                 return dest, dbranch, None, None
             ui.debug('comparing with %s\n' % util.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]
         repo.ui.pushbuffer()
         outgoing = discovery.findcommonoutgoing(repo, dother, onlyheads=revs,
                                                 commoninc=common)
         repo.ui.popbuffer()
         return dest, dbranch, dother, outgoing
 
     if needsoutgoing:
         dest, dbranch, dother, outgoing = getoutgoing()
     else:
         dest = dbranch = dother = outgoing = None
 
     if opts.get('remote'):
         t = []
         if incoming:
             t.append(_('1 or more incoming'))
         o = outgoing.missing
         if o:
             t.append(_('%d outgoing') % len(o))
         other = dother or sother
         if 'bookmarks' in other.listkeys('namespaces'):
             counts = bookmarks.summary(repo, other)
             if counts[0] > 0:
                 t.append(_('%d incoming bookmarks') % counts[0])
             if counts[1] > 0:
                 t.append(_('%d outgoing bookmarks') % counts[1])
 
         if t:
             # i18n: column positioning for "hg summary"
             ui.write(_('remote: %s\n') % (', '.join(t)))
         else:
             # i18n: column positioning for "hg summary"
             ui.status(_('remote: (synced)\n'))
 
     cmdutil.summaryremotehooks(ui, repo, opts,
                                ((source, sbranch, sother, commoninc),
                                 (dest, dbranch, dother, outgoing)))
 
 @command('tag',
     [('f', 'force', None, _('force tag')),
     ('l', 'local', None, _('make the tag local')),
     ('r', 'rev', '', _('revision to tag'), _('REV')),
     ('', 'remove', None, _('remove a tag')),
     # -l/--local is already there, commitopts cannot be used
     ('e', 'edit', None, _('invoke editor on commit messages')),
     ('m', 'message', '', _('use text as commit message'), _('TEXT')),
     ] + commitopts2,
     _('[-f] [-l] [-m TEXT] [-d DATE] [-u USER] [-r REV] NAME...'))
 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.
     """
     opts = pycompat.byteskwargs(opts)
     wlock = lock = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
         rev_ = "."
         names = [t.strip() for t in (name1,) + names]
         if len(names) != len(set(names)):
             raise error.Abort(_('tag names must be unique'))
         for n in names:
             scmutil.checknewlabel(repo, n, 'tag')
             if not n:
                 raise error.Abort(_('tag names cannot consist entirely of '
                                    'whitespace'))
         if opts.get('rev') and opts.get('remove'):
             raise error.Abort(_("--rev and --remove are incompatible"))
         if opts.get('rev'):
             rev_ = opts['rev']
         message = opts.get('message')
         if opts.get('remove'):
             if opts.get('local'):
                 expectedtype = 'local'
             else:
                 expectedtype = 'global'
 
             for n in names:
                 if not repo.tagtype(n):
                     raise error.Abort(_("tag '%s' does not exist") % n)
                 if repo.tagtype(n) != expectedtype:
                     if expectedtype == 'global':
                         raise error.Abort(_("tag '%s' is not a global tag") % n)
                     else:
                         raise error.Abort(_("tag '%s' is not a local tag") % n)
             rev_ = 'null'
             if not message:
                 # we don't translate commit messages
                 message = 'Removed tag %s' % ', '.join(names)
         elif not opts.get('force'):
             for n in names:
                 if n in repo.tags():
                     raise error.Abort(_("tag '%s' already exists "
                                        "(use -f to force)") % n)
         if not opts.get('local'):
             p1, p2 = repo.dirstate.parents()
             if p2 != nullid:
                 raise error.Abort(_('uncommitted merge'))
             bheads = repo.branchheads()
             if not opts.get('force') and bheads and p1 not in bheads:
                 raise error.Abort(_('working directory is not at a branch head '
                                     '(use -f to force)'))
         r = scmutil.revsingle(repo, rev_).node()
 
         if not message:
             # we don't translate commit messages
             message = ('Added tag %s for changeset %s' %
                        (', '.join(names), short(r)))
 
         date = opts.get('date')
         if date:
             date = util.parsedate(date)
 
         if opts.get('remove'):
             editform = 'tag.remove'
         else:
             editform = 'tag.add'
         editor = cmdutil.getcommiteditor(editform=editform,
                                          **pycompat.strkwargs(opts))
 
         # don't allow tagging the null rev
         if (not opts.get('remove') and
             scmutil.revsingle(repo, rev_).rev() == nullrev):
             raise error.Abort(_("cannot tag null revision"))
 
         tagsmod.tag(repo, names, r, message, opts.get('local'),
                     opts.get('user'), date, editor=editor)
     finally:
         release(lock, wlock)
 
 @command('tags', formatteropts, '')
 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.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager('tags')
     fm = ui.formatter('tags', opts)
     hexfunc = fm.hexfunc
     tagtype = ""
 
     for t, n in reversed(repo.tagslist()):
         hn = hexfunc(n)
         label = 'tags.normal'
         tagtype = ''
         if repo.tagtype(t) == 'local':
             label = 'tags.local'
             tagtype = 'local'
 
         fm.startitem()
         fm.write('tag', '%s', t, label=label)
         fmt = " " * (30 - encoding.colwidth(t)) + ' %5d:%s'
         fm.condwrite(not ui.quiet, 'rev node', fmt,
                      repo.changelog.rev(n), hn, label=label)
         fm.condwrite(ui.verbose and tagtype, 'type', ' %s',
                      tagtype, label=label)
         fm.plain('\n')
     fm.end()
 
 @command('tip',
     [('p', 'patch', None, _('show patch')),
     ('g', 'git', None, _('use git extended diff format')),
     ] + templateopts,
     _('[-p] [-g]'))
 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 = cmdutil.show_changeset(ui, repo, opts)
     displayer.show(repo['tip'])
     displayer.close()
 
 @command('unbundle',
     [('u', 'update', None,
      _('update to new branch head if changesets were unbundled'))],
     _('[-u] FILE...'))
 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.Abort(
                         _('packed bundles cannot be applied with '
                           '"hg unbundle"'),
                         hint=_('use "hg debugapplystreamclonebundle"'))
             url = 'bundle:' + fname
             try:
                 txnname = 'unbundle'
                 if not isinstance(gen, bundle2.unbundle20):
                     txnname = 'unbundle\n%s' % util.hidepassword(url)
                 with repo.transaction(txnname) as tr:
                     op = bundle2.applybundle(repo, gen, tr, source='unbundle',
                                              url=url)
             except error.BundleUnknownFeatureError as exc:
                 raise error.Abort(
                     _('%s: unknown bundle feature, %s') % (fname, exc),
                     hint=_("see https://mercurial-scm.org/"
                            "wiki/BundleFeature for more "
                            "information"))
             modheads = bundle2.combinechangegroupresults(op)
 
     return postincoming(ui, repo, modheads, opts.get(r'update'), None, None)
 
 @command('^update|up|checkout|co',
     [('C', 'clean', None, _('discard uncommitted changes (no backup)')),
     ('c', 'check', None, _('require clean working directory')),
     ('m', 'merge', None, _('merge uncommitted changes')),
     ('d', 'date', '', _('tipmost revision matching date'), _('DATE')),
     ('r', 'rev', '', _('revision'), _('REV'))
      ] + mergetoolopts,
     _('[-C|-c|-m] [-d DATE] [[-r] REV]'))
 def update(ui, repo, node=None, rev=None, clean=False, date=None, check=False,
            merge=None, tool=None):
     """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:`update --clean .`.
 
     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.
     """
     if rev and node:
         raise error.Abort(_("please specify just one revision"))
 
     if ui.configbool('commands', 'update.requiredest'):
         if not node and not rev and not date:
             raise error.Abort(_('you must specify a destination'),
                               hint=_('for example: hg update ".::"'))
 
     if rev is None or rev == '':
         rev = node
 
     if date and rev is not None:
         raise error.Abort(_("you can't specify a revision and a date"))
 
     if len([x for x in (clean, check, merge) if x]) > 1:
         raise error.Abort(_("can only specify one of -C/--clean, -c/--check, "
                             "or -m/merge"))
 
     updatecheck = None
     if check:
         updatecheck = 'abort'
     elif merge:
         updatecheck = '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
         rev = scmutil.revsingle(repo, rev, rev).rev()
 
         repo.ui.setconfig('ui', 'forcemerge', tool, 'update')
 
         return hg.updatetotally(ui, repo, rev, brev, clean=clean,
                                 updatecheck=updatecheck)
 
 @command('verify', [])
 def verify(ui, repo):
     """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.
     """
     return hg.verify(repo)
 
 @command('version', [] + formatteropts, norepo=True)
 def version_(ui, **opts):
     """output version and copyright information"""
     opts = pycompat.byteskwargs(opts)
     if ui.verbose:
         ui.pager('version')
     fm = ui.formatter("version", opts)
     fm.startitem()
     fm.write("ver", _("Mercurial Distributed SCM (version %s)\n"),
              util.version())
     license = _(
         "(see https://mercurial-scm.org for more information)\n"
         "\nCopyright (C) 2005-2017 Matt Mackall and others\n"
         "This is free software; see the source for copying conditions. "
         "There is NO\nwarranty; "
         "not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
     )
     if not ui.quiet:
         fm.plain(license)
 
     if ui.verbose:
         fm.plain(_("\nEnabled extensions:\n\n"))
     # format names and versions into columns
     names = []
     vers = []
     isinternals = []
     for name, module in extensions.extensions():
         names.append(name)
         vers.append(extensions.moduleversion(module) or None)
         isinternals.append(extensions.ismoduleinternal(module))
     fn = fm.nested("extensions")
     if names:
         namefmt = "  %%-%ds  " % max(len(n) for n in names)
         places = [_("external"), _("internal")]
         for n, v, p in zip(names, vers, isinternals):
             fn.startitem()
             fn.condwrite(ui.verbose, "name", namefmt, n)
             if ui.verbose:
                 fn.plain("%s  " % places[p])
             fn.data(bundled=p)
             fn.condwrite(ui.verbose and v, "ver", "%s", v)
             if ui.verbose:
                 fn.plain("\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(_("extension '%s' overrides commands: %s\n")
                 % (name, " ".join(overrides)))
     table.update(cmdtable)

mercurial/context.py

@@ -1,2557 +1,2566
 # context.py - changeset and file context objects for mercurial
 #
 # Copyright 2006, 2007 Matt 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 stat
 
 from .i18n import _
 from .node import (
     addednodeid,
     bin,
     hex,
     modifiednodeid,
     nullid,
     nullrev,
     short,
     wdirid,
     wdirnodes,
     wdirrev,
 )
+from .thirdparty import (
+    attr,
+)
 from . import (
     encoding,
     error,
     fileset,
     match as matchmod,
     mdiff,
     obsolete as obsmod,
     patch,
     pathutil,
     phases,
     pycompat,
     repoview,
     revlog,
     scmutil,
     sparse,
     subrepo,
     util,
 )
 
 propertycache = util.propertycache
 
 nonascii = re.compile(r'[^\x21-\x7f]').search
 
 class basectx(object):
     """A basectx object represents the common logic for its children:
     changectx: read-only context that is already present in the repo,
     workingctx: a context that represents the working directory and can
                 be committed,
     memctx: a context that represents changes in-memory and can also
             be committed."""
     def __new__(cls, repo, changeid='', *args, **kwargs):
         if isinstance(changeid, basectx):
             return changeid
 
         o = super(basectx, cls).__new__(cls)
 
         o._repo = repo
         o._rev = nullrev
         o._node = nullid
 
         return o
 
     def __bytes__(self):
         return short(self.node())
 
     __str__ = encoding.strmethod(__bytes__)
 
     def __int__(self):
         return self.rev()
 
     def __repr__(self):
         return r"<%s %s>" % (type(self).__name__, str(self))
 
     def __eq__(self, other):
         try:
             return type(self) == type(other) and self._rev == other._rev
         except AttributeError:
             return False
 
     def __ne__(self, other):
         return not (self == other)
 
     def __contains__(self, key):
         return key in self._manifest
 
     def __getitem__(self, key):
         return self.filectx(key)
 
     def __iter__(self):
         return iter(self._manifest)
 
     def _buildstatusmanifest(self, status):
         """Builds a manifest that includes the given status results, if this is
         a working copy context. For non-working copy contexts, it just returns
         the normal manifest."""
         return self.manifest()
 
     def _matchstatus(self, other, match):
         """This internal method provides a way for child objects to override the
         match operator.
         """
         return match
 
     def _buildstatus(self, other, s, match, listignored, listclean,
                      listunknown):
         """build a status with respect to another context"""
         # Load earliest manifest first for caching reasons. More specifically,
         # if you have revisions 1000 and 1001, 1001 is probably stored as a
         # delta against 1000. Thus, if you read 1000 first, we'll reconstruct
         # 1000 and cache it so that when you read 1001, we just need to apply a
         # delta to what's in the cache. So that's one full reconstruction + one
         # delta application.
         mf2 = None
         if self.rev() is not None and self.rev() < other.rev():
             mf2 = self._buildstatusmanifest(s)
         mf1 = other._buildstatusmanifest(s)
         if mf2 is None:
             mf2 = self._buildstatusmanifest(s)
 
         modified, added = [], []
         removed = []
         clean = []
         deleted, unknown, ignored = s.deleted, s.unknown, s.ignored
         deletedset = set(deleted)
         d = mf1.diff(mf2, match=match, clean=listclean)
         for fn, value in d.iteritems():
             if fn in deletedset:
                 continue
             if value is None:
                 clean.append(fn)
                 continue
             (node1, flag1), (node2, flag2) = value
             if node1 is None:
                 added.append(fn)
             elif node2 is None:
                 removed.append(fn)
             elif flag1 != flag2:
                 modified.append(fn)
             elif node2 not in wdirnodes:
                 # When comparing files between two commits, we save time by
                 # not comparing the file contents when the nodeids differ.
                 # Note that this means we incorrectly report a reverted change
                 # to a file as a modification.
                 modified.append(fn)
             elif self[fn].cmp(other[fn]):
                 modified.append(fn)
             else:
                 clean.append(fn)
 
         if removed:
             # need to filter files if they are already reported as removed
             unknown = [fn for fn in unknown if fn not in mf1 and
                                                (not match or match(fn))]
             ignored = [fn for fn in ignored if fn not in mf1 and
                                                (not match or match(fn))]
             # if they're deleted, don't report them as removed
             removed = [fn for fn in removed if fn not in deletedset]
 
         return scmutil.status(modified, added, removed, deleted, unknown,
                               ignored, clean)
 
     @propertycache
     def substate(self):
         return subrepo.state(self, self._repo.ui)
 
     def subrev(self, subpath):
         return self.substate[subpath][1]
 
     def rev(self):
         return self._rev
     def node(self):
         return self._node
     def hex(self):
         return hex(self.node())
     def manifest(self):
         return self._manifest
     def manifestctx(self):
         return self._manifestctx
     def repo(self):
         return self._repo
     def phasestr(self):
         return phases.phasenames[self.phase()]
     def mutable(self):
         return self.phase() > phases.public
 
     def getfileset(self, expr):
         return fileset.getfileset(self, expr)
 
     def obsolete(self):
         """True if the changeset is obsolete"""
         return self.rev() in obsmod.getrevs(self._repo, 'obsolete')
 
     def extinct(self):
         """True if the changeset is extinct"""
         return self.rev() in obsmod.getrevs(self._repo, 'extinct')
 
     def unstable(self):
         msg = ("'context.unstable' is deprecated, "
                "use 'context.orphan'")
         self._repo.ui.deprecwarn(msg, '4.4')
         return self.orphan()
 
     def orphan(self):
         """True if the changeset is not obsolete but it's ancestor are"""
         return self.rev() in obsmod.getrevs(self._repo, 'orphan')
 
     def bumped(self):
         msg = ("'context.bumped' is deprecated, "
                "use 'context.phasedivergent'")
         self._repo.ui.deprecwarn(msg, '4.4')
         return self.phasedivergent()
 
     def phasedivergent(self):
         """True if the changeset try to be a successor of a public changeset
 
         Only non-public and non-obsolete changesets may be bumped.
         """
         return self.rev() in obsmod.getrevs(self._repo, 'phasedivergent')
 
     def divergent(self):
         msg = ("'context.divergent' is deprecated, "
                "use 'context.contentdivergent'")
         self._repo.ui.deprecwarn(msg, '4.4')
         return self.contentdivergent()
 
     def contentdivergent(self):
         """Is a successors of a changeset with multiple possible successors set
 
         Only non-public and non-obsolete changesets may be divergent.
         """
         return self.rev() in obsmod.getrevs(self._repo, 'contentdivergent')
 
     def troubled(self):
         msg = ("'context.troubled' is deprecated, "
                "use 'context.isunstable'")
         self._repo.ui.deprecwarn(msg, '4.4')
         return self.isunstable()
 
     def isunstable(self):
         """True if the changeset is either unstable, bumped or divergent"""
         return self.orphan() or self.phasedivergent() or self.contentdivergent()
 
     def troubles(self):
         """Keep the old version around in order to avoid breaking extensions
         about different return values.
         """
         msg = ("'context.troubles' is deprecated, "
                "use 'context.instabilities'")
         self._repo.ui.deprecwarn(msg, '4.4')
 
         troubles = []
         if self.orphan():
             troubles.append('orphan')
         if self.phasedivergent():
             troubles.append('bumped')
         if self.contentdivergent():
             troubles.append('divergent')
         return troubles
 
     def instabilities(self):
         """return the list of instabilities affecting this changeset.
 
         Instabilities are returned as strings. possible values are:
         - orphan,
         - phase-divergent,
         - content-divergent.
         """
         instabilities = []
         if self.orphan():
             instabilities.append('orphan')
         if self.phasedivergent():
             instabilities.append('phase-divergent')
         if self.contentdivergent():
             instabilities.append('content-divergent')
         return instabilities
 
     def parents(self):
         """return contexts for each parent changeset"""
         return self._parents
 
     def p1(self):
         return self._parents[0]
 
     def p2(self):
         parents = self._parents
         if len(parents) == 2:
             return parents[1]
         return changectx(self._repo, nullrev)
 
     def _fileinfo(self, path):
         if r'_manifest' in self.__dict__:
             try:
                 return self._manifest[path], self._manifest.flags(path)
             except KeyError:
                 raise error.ManifestLookupError(self._node, path,
                                                 _('not found in manifest'))
         if r'_manifestdelta' in self.__dict__ or path in self.files():
             if path in self._manifestdelta:
                 return (self._manifestdelta[path],
                         self._manifestdelta.flags(path))
         mfl = self._repo.manifestlog
         try:
             node, flag = mfl[self._changeset.manifest].find(path)
         except KeyError:
             raise error.ManifestLookupError(self._node, path,
                                             _('not found in manifest'))
 
         return node, flag
 
     def filenode(self, path):
         return self._fileinfo(path)[0]
 
     def flags(self, path):
         try:
             return self._fileinfo(path)[1]
         except error.LookupError:
             return ''
 
     def sub(self, path, allowcreate=True):
         '''return a subrepo for the stored revision of path, never wdir()'''
         return subrepo.subrepo(self, path, allowcreate=allowcreate)
 
     def nullsub(self, path, pctx):
         return subrepo.nullsubrepo(self, path, pctx)
 
     def workingsub(self, path):
         '''return a subrepo for the stored revision, or wdir if this is a wdir
         context.
         '''
         return subrepo.subrepo(self, path, allowwdir=True)
 
     def match(self, pats=None, include=None, exclude=None, default='glob',
               listsubrepos=False, badfn=None):
         r = self._repo
         return matchmod.match(r.root, r.getcwd(), pats,
                               include, exclude, default,
                               auditor=r.nofsauditor, ctx=self,
                               listsubrepos=listsubrepos, badfn=badfn)
 
     def diff(self, ctx2=None, match=None, **opts):
         """Returns a diff generator for the given contexts and matcher"""
         if ctx2 is None:
             ctx2 = self.p1()
         if ctx2 is not None:
             ctx2 = self._repo[ctx2]
         diffopts = patch.diffopts(self._repo.ui, opts)
         return patch.diff(self._repo, ctx2, self, match=match, opts=diffopts)
 
     def dirs(self):
         return self._manifest.dirs()
 
     def hasdir(self, dir):
         return self._manifest.hasdir(dir)
 
     def status(self, other=None, match=None, listignored=False,
                listclean=False, listunknown=False, listsubrepos=False):
         """return status of files between two nodes or node and working
         directory.
 
         If other is None, compare this node with working directory.
 
         returns (modified, added, removed, deleted, unknown, ignored, clean)
         """
 
         ctx1 = self
         ctx2 = self._repo[other]
 
         # This next code block is, admittedly, fragile logic that tests for
         # reversing the contexts and wouldn't need to exist if it weren't for
         # the fast (and common) code path of comparing the working directory
         # with its first parent.
         #
         # What we're aiming for here is the ability to call:
         #
         # workingctx.status(parentctx)
         #
         # If we always built the manifest for each context and compared those,
         # then we'd be done. But the special case of the above call means we
         # just copy the manifest of the parent.
         reversed = False
         if (not isinstance(ctx1, changectx)
             and isinstance(ctx2, changectx)):
             reversed = True
             ctx1, ctx2 = ctx2, ctx1
 
         match = match or matchmod.always(self._repo.root, self._repo.getcwd())
         match = ctx2._matchstatus(ctx1, match)
         r = scmutil.status([], [], [], [], [], [], [])
         r = ctx2._buildstatus(ctx1, r, match, listignored, listclean,
                               listunknown)
 
         if reversed:
             # Reverse added and removed. Clear deleted, unknown and ignored as
             # these make no sense to reverse.
             r = scmutil.status(r.modified, r.removed, r.added, [], [], [],
                                r.clean)
 
         if listsubrepos:
             for subpath, sub in scmutil.itersubrepos(ctx1, ctx2):
                 try:
                     rev2 = ctx2.subrev(subpath)
                 except KeyError:
                     # A subrepo that existed in node1 was deleted between
                     # node1 and node2 (inclusive). Thus, ctx2's substate
                     # won't contain that subpath. The best we can do ignore it.
                     rev2 = None
                 submatch = matchmod.subdirmatcher(subpath, match)
                 s = sub.status(rev2, match=submatch, ignored=listignored,
                                clean=listclean, unknown=listunknown,
                                listsubrepos=True)
                 for rfiles, sfiles in zip(r, s):
                     rfiles.extend("%s/%s" % (subpath, f) for f in sfiles)
 
         for l in r:
             l.sort()
 
         return r
 
 def _filterederror(repo, changeid):
     """build an exception to be raised about a filtered changeid
 
     This is extracted in a function to help extensions (eg: evolve) to
     experiment with various message variants."""
     if repo.filtername.startswith('visible'):
         msg = _("hidden revision '%s'") % changeid
         hint = _('use --hidden to access hidden revisions')
         return error.FilteredRepoLookupError(msg, hint=hint)
     msg = _("filtered revision '%s' (not in '%s' subset)")
     msg %= (changeid, repo.filtername)
     return error.FilteredRepoLookupError(msg)
 
 class changectx(basectx):
     """A changecontext object makes access to data related to a particular
     changeset convenient. It represents a read-only context already present in
     the repo."""
     def __init__(self, repo, changeid=''):
         """changeid is a revision number, node, or tag"""
 
         # since basectx.__new__ already took care of copying the object, we
         # don't need to do anything in __init__, so we just exit here
         if isinstance(changeid, basectx):
             return
 
         if changeid == '':
             changeid = '.'
         self._repo = repo
 
         try:
             if isinstance(changeid, int):
                 self._node = repo.changelog.node(changeid)
                 self._rev = changeid
                 return
             if not pycompat.ispy3 and isinstance(changeid, long):
                 changeid = str(changeid)
             if changeid == 'null':
                 self._node = nullid
                 self._rev = nullrev
                 return
             if changeid == 'tip':
                 self._node = repo.changelog.tip()
                 self._rev = repo.changelog.rev(self._node)
                 return
             if changeid == '.' or changeid == repo.dirstate.p1():
                 # this is a hack to delay/avoid loading obsmarkers
                 # when we know that '.' won't be hidden
                 self._node = repo.dirstate.p1()
                 self._rev = repo.unfiltered().changelog.rev(self._node)
                 return
             if len(changeid) == 20:
                 try:
                     self._node = changeid
                     self._rev = repo.changelog.rev(changeid)
                     return
                 except error.FilteredRepoLookupError:
                     raise
                 except LookupError:
                     pass
 
             try:
                 r = int(changeid)
                 if '%d' % r != changeid:
                     raise ValueError
                 l = len(repo.changelog)
                 if r < 0:
                     r += l
                 if r < 0 or r >= l and r != wdirrev:
                     raise ValueError
                 self._rev = r
                 self._node = repo.changelog.node(r)
                 return
             except error.FilteredIndexError:
                 raise
             except (ValueError, OverflowError, IndexError):
                 pass
 
             if len(changeid) == 40:
                 try:
                     self._node = bin(changeid)
                     self._rev = repo.changelog.rev(self._node)
                     return
                 except error.FilteredLookupError:
                     raise
                 except (TypeError, LookupError):
                     pass
 
             # lookup bookmarks through the name interface
             try:
                 self._node = repo.names.singlenode(repo, changeid)
                 self._rev = repo.changelog.rev(self._node)
                 return
             except KeyError:
                 pass
             except error.FilteredRepoLookupError:
                 raise
             except error.RepoLookupError:
                 pass
 
             self._node = repo.unfiltered().changelog._partialmatch(changeid)
             if self._node is not None:
                 self._rev = repo.changelog.rev(self._node)
                 return
 
             # lookup failed
             # check if it might have come from damaged dirstate
             #
             # XXX we could avoid the unfiltered if we had a recognizable
             # exception for filtered changeset access
             if changeid in repo.unfiltered().dirstate.parents():
                 msg = _("working directory has unknown parent '%s'!")
                 raise error.Abort(msg % short(changeid))
             try:
                 if len(changeid) == 20 and nonascii(changeid):
                     changeid = hex(changeid)
             except TypeError:
                 pass
         except (error.FilteredIndexError, error.FilteredLookupError,
                 error.FilteredRepoLookupError):
             raise _filterederror(repo, changeid)
         except IndexError:
             pass
         raise error.RepoLookupError(
             _("unknown revision '%s'") % changeid)
 
     def __hash__(self):
         try:
             return hash(self._rev)
         except AttributeError:
             return id(self)
 
     def __nonzero__(self):
         return self._rev != nullrev
 
     __bool__ = __nonzero__
 
     @propertycache
     def _changeset(self):
         return self._repo.changelog.changelogrevision(self.rev())
 
     @propertycache
     def _manifest(self):
         return self._manifestctx.read()
 
     @property
     def _manifestctx(self):
         return self._repo.manifestlog[self._changeset.manifest]
 
     @propertycache
     def _manifestdelta(self):
         return self._manifestctx.readdelta()
 
     @propertycache
     def _parents(self):
         repo = self._repo
         p1, p2 = repo.changelog.parentrevs(self._rev)
         if p2 == nullrev:
             return [changectx(repo, p1)]
         return [changectx(repo, p1), changectx(repo, p2)]
 
     def changeset(self):
         c = self._changeset
         return (
             c.manifest,
             c.user,
             c.date,
             c.files,
             c.description,
             c.extra,
         )
     def manifestnode(self):
         return self._changeset.manifest
 
     def user(self):
         return self._changeset.user
     def date(self):
         return self._changeset.date
     def files(self):
         return self._changeset.files
     def description(self):
         return self._changeset.description
     def branch(self):
         return encoding.tolocal(self._changeset.extra.get("branch"))
     def closesbranch(self):
         return 'close' in self._changeset.extra
     def extra(self):
         return self._changeset.extra
     def tags(self):
         return self._repo.nodetags(self._node)
     def bookmarks(self):
         return self._repo.nodebookmarks(self._node)
     def phase(self):
         return self._repo._phasecache.phase(self._repo, self._rev)
     def hidden(self):
         return self._rev in repoview.filterrevs(self._repo, 'visible')
 
     def children(self):
         """return contexts for each child changeset"""
         c = self._repo.changelog.children(self._node)
         return [changectx(self._repo, x) for x in c]
 
     def ancestors(self):
         for a in self._repo.changelog.ancestors([self._rev]):
             yield changectx(self._repo, a)
 
     def descendants(self):
         for d in self._repo.changelog.descendants([self._rev]):
             yield changectx(self._repo, d)
 
     def filectx(self, path, fileid=None, filelog=None):
         """get a file context from this changeset"""
         if fileid is None:
             fileid = self.filenode(path)
         return filectx(self._repo, path, fileid=fileid,
                        changectx=self, filelog=filelog)
 
     def ancestor(self, c2, warn=False):
         """return the "best" ancestor context of self and c2
 
         If there are multiple candidates, it will show a message and check
         merge.preferancestor configuration before falling back to the
         revlog ancestor."""
         # deal with workingctxs
         n2 = c2._node
         if n2 is None:
             n2 = c2._parents[0]._node
         cahs = self._repo.changelog.commonancestorsheads(self._node, n2)
         if not cahs:
             anc = nullid
         elif len(cahs) == 1:
             anc = cahs[0]
         else:
             # experimental config: merge.preferancestor
             for r in self._repo.ui.configlist('merge', 'preferancestor', ['*']):
                 try:
                     ctx = changectx(self._repo, r)
                 except error.RepoLookupError:
                     continue
                 anc = ctx.node()
                 if anc in cahs:
                     break
             else:
                 anc = self._repo.changelog.ancestor(self._node, n2)
             if warn:
                 self._repo.ui.status(
                     (_("note: using %s as ancestor of %s and %s\n") %
                      (short(anc), short(self._node), short(n2))) +
                     ''.join(_("      alternatively, use --config "
                               "merge.preferancestor=%s\n") %
                             short(n) for n in sorted(cahs) if n != anc))
         return changectx(self._repo, anc)
 
     def descendant(self, other):
         """True if other is descendant of this changeset"""
         return self._repo.changelog.descendant(self._rev, other._rev)
 
     def walk(self, match):
         '''Generates matching file names.'''
 
         # Wrap match.bad method to have message with nodeid
         def bad(fn, msg):
             # The manifest doesn't know about subrepos, so don't complain about
             # paths into valid subrepos.
             if any(fn == s or fn.startswith(s + '/')
                    for s in self.substate):
                 return
             match.bad(fn, _('no such file in rev %s') % self)
 
         m = matchmod.badmatch(match, bad)
         return self._manifest.walk(m)
 
     def matches(self, match):
         return self.walk(match)
 
 class basefilectx(object):
     """A filecontext object represents the common logic for its children:
     filectx: read-only access to a filerevision that is already present
              in the repo,
     workingfilectx: a filecontext that represents files from the working
                     directory,
     memfilectx: a filecontext that represents files in-memory,
     overlayfilectx: duplicate another filecontext with some fields overridden.
     """
     @propertycache
     def _filelog(self):
         return self._repo.file(self._path)
 
     @propertycache
     def _changeid(self):
         if r'_changeid' in self.__dict__:
             return self._changeid
         elif r'_changectx' in self.__dict__:
             return self._changectx.rev()
         elif r'_descendantrev' in self.__dict__:
             # this file context was created from a revision with a known
             # descendant, we can (lazily) correct for linkrev aliases
             return self._adjustlinkrev(self._descendantrev)
         else:
             return self._filelog.linkrev(self._filerev)
 
     @propertycache
     def _filenode(self):
         if r'_fileid' in self.__dict__:
             return self._filelog.lookup(self._fileid)
         else:
             return self._changectx.filenode(self._path)
 
     @propertycache
     def _filerev(self):
         return self._filelog.rev(self._filenode)
 
     @propertycache
     def _repopath(self):
         return self._path
 
     def __nonzero__(self):
         try:
             self._filenode
             return True
         except error.LookupError:
             # file is missing
             return False
 
     __bool__ = __nonzero__
 
     def __bytes__(self):
         try:
             return "%s@%s" % (self.path(), self._changectx)
         except error.LookupError:
             return "%s@???" % self.path()
 
     __str__ = encoding.strmethod(__bytes__)
 
     def __repr__(self):
         return "<%s %s>" % (type(self).__name__, str(self))
 
     def __hash__(self):
         try:
             return hash((self._path, self._filenode))
         except AttributeError:
             return id(self)
 
     def __eq__(self, other):
         try:
             return (type(self) == type(other) and self._path == other._path
                     and self._filenode == other._filenode)
         except AttributeError:
             return False
 
     def __ne__(self, other):
         return not (self == other)
 
     def filerev(self):
         return self._filerev
     def filenode(self):
         return self._filenode
     @propertycache
     def _flags(self):
         return self._changectx.flags(self._path)
     def flags(self):
         return self._flags
     def filelog(self):
         return self._filelog
     def rev(self):
         return self._changeid
     def linkrev(self):
         return self._filelog.linkrev(self._filerev)
     def node(self):
         return self._changectx.node()
     def hex(self):
         return self._changectx.hex()
     def user(self):
         return self._changectx.user()
     def date(self):
         return self._changectx.date()
     def files(self):
         return self._changectx.files()
     def description(self):
         return self._changectx.description()
     def branch(self):
         return self._changectx.branch()
     def extra(self):
         return self._changectx.extra()
     def phase(self):
         return self._changectx.phase()
     def phasestr(self):
         return self._changectx.phasestr()
     def manifest(self):
         return self._changectx.manifest()
     def changectx(self):
         return self._changectx
     def renamed(self):
         return self._copied
     def repo(self):
         return self._repo
     def size(self):
         return len(self.data())
 
     def path(self):
         return self._path
 
     def isbinary(self):
         try:
             return util.binary(self.data())
         except IOError:
             return False
     def isexec(self):
         return 'x' in self.flags()
     def islink(self):
         return 'l' in self.flags()
 
     def isabsent(self):
         """whether this filectx represents a file not in self._changectx
 
         This is mainly for merge code to detect change/delete conflicts. This is
         expected to be True for all subclasses of basectx."""
         return False
 
     _customcmp = False
     def cmp(self, fctx):
         """compare with other file context
 
         returns True if different than fctx.
         """
         if fctx._customcmp:
             return fctx.cmp(self)
 
         if (fctx._filenode is None
             and (self._repo._encodefilterpats
                  # if file data starts with '\1\n', empty metadata block is
                  # prepended, which adds 4 bytes to filelog.size().
                  or self.size() - 4 == fctx.size())
             or self.size() == fctx.size()):
             return self._filelog.cmp(self._filenode, fctx.data())
 
         return True
 
     def _adjustlinkrev(self, srcrev, inclusive=False):
         """return the first ancestor of <srcrev> introducing <fnode>
 
         If the linkrev of the file revision does not point to an ancestor of
         srcrev, we'll walk down the ancestors until we find one introducing
         this file revision.
 
         :srcrev: the changeset revision we search ancestors from
         :inclusive: if true, the src revision will also be checked
         """
         repo = self._repo
         cl = repo.unfiltered().changelog
         mfl = repo.manifestlog
         # fetch the linkrev
         lkr = self.linkrev()
         # hack to reuse ancestor computation when searching for renames
         memberanc = getattr(self, '_ancestrycontext', None)
         iteranc = None
         if srcrev is None:
             # wctx case, used by workingfilectx during mergecopy
             revs = [p.rev() for p in self._repo[None].parents()]
             inclusive = True # we skipped the real (revless) source
         else:
             revs = [srcrev]
         if memberanc is None:
             memberanc = iteranc = cl.ancestors(revs, lkr,
                                                inclusive=inclusive)
         # check if this linkrev is an ancestor of srcrev
         if lkr not in memberanc:
             if iteranc is None:
                 iteranc = cl.ancestors(revs, lkr, inclusive=inclusive)
             fnode = self._filenode
             path = self._path
             for a in iteranc:
                 ac = cl.read(a) # get changeset data (we avoid object creation)
                 if path in ac[3]: # checking the 'files' field.
                     # The file has been touched, check if the content is
                     # similar to the one we search for.
                     if fnode == mfl[ac[0]].readfast().get(path):
                         return a
             # In theory, we should never get out of that loop without a result.
             # But if manifest uses a buggy file revision (not children of the
             # one it replaces) we could. Such a buggy situation will likely
             # result is crash somewhere else at to some point.
         return lkr
 
     def introrev(self):
         """return the rev of the changeset which introduced this file revision
 
         This method is different from linkrev because it take into account the
         changeset the filectx was created from. It ensures the returned
         revision is one of its ancestors. This prevents bugs from
         'linkrev-shadowing' when a file revision is used by multiple
         changesets.
         """
         lkr = self.linkrev()
         attrs = vars(self)
         noctx = not ('_changeid' in attrs or '_changectx' in attrs)
         if noctx or self.rev() == lkr:
             return self.linkrev()
         return self._adjustlinkrev(self.rev(), inclusive=True)
 
     def _parentfilectx(self, path, fileid, filelog):
         """create parent filectx keeping ancestry info for _adjustlinkrev()"""
         fctx = filectx(self._repo, path, fileid=fileid, filelog=filelog)
         if '_changeid' in vars(self) or '_changectx' in vars(self):
             # If self is associated with a changeset (probably explicitly
             # fed), ensure the created filectx is associated with a
             # changeset that is an ancestor of self.changectx.
             # This lets us later use _adjustlinkrev to get a correct link.
             fctx._descendantrev = self.rev()
             fctx._ancestrycontext = getattr(self, '_ancestrycontext', None)
         elif '_descendantrev' in vars(self):
             # Otherwise propagate _descendantrev if we have one associated.
             fctx._descendantrev = self._descendantrev
             fctx._ancestrycontext = getattr(self, '_ancestrycontext', None)
         return fctx
 
     def parents(self):
         _path = self._path
         fl = self._filelog
         parents = self._filelog.parents(self._filenode)
         pl = [(_path, node, fl) for node in parents if node != nullid]
 
         r = fl.renamed(self._filenode)
         if r:
             # - In the simple rename case, both parent are nullid, pl is empty.
             # - In case of merge, only one of the parent is null id and should
             # be replaced with the rename information. This parent is -always-
             # the first one.
             #
             # As null id have always been filtered out in the previous list
             # comprehension, inserting to 0 will always result in "replacing
             # first nullid parent with rename information.
             pl.insert(0, (r[0], r[1], self._repo.file(r[0])))
 
         return [self._parentfilectx(path, fnode, l) for path, fnode, l in pl]
 
     def p1(self):
         return self.parents()[0]
 
     def p2(self):
         p = self.parents()
         if len(p) == 2:
             return p[1]
         return filectx(self._repo, self._path, fileid=-1, filelog=self._filelog)
 
     def annotate(self, follow=False, linenumber=False, skiprevs=None,
                  diffopts=None):
         '''returns a list of tuples of ((ctx, number), line) for each line
         in the file, where ctx is the filectx of the node where
         that line was last changed; if linenumber parameter is true, number is
         the line number at the first appearance in the managed file, otherwise,
         number has a fixed value of False.
         '''
 
         def lines(text):
             if text.endswith("\n"):
                 return text.count("\n")
             return text.count("\n") + int(bool(text))
 
         if linenumber:
             def decorate(text, rev):
-                return ([(rev, i) for i in xrange(1, lines(text) + 1)], text)
+                return ([annotateline(fctx=rev, lineno=i)
+                         for i in xrange(1, lines(text) + 1)], text)
         else:
             def decorate(text, rev):
-                return ([(rev, False)] * lines(text), text)
+                return ([annotateline(fctx=rev)] * lines(text), text)
 
         getlog = util.lrucachefunc(lambda x: self._repo.file(x))
 
         def parents(f):
             # Cut _descendantrev here to mitigate the penalty of lazy linkrev
             # adjustment. Otherwise, p._adjustlinkrev() would walk changelog
             # from the topmost introrev (= srcrev) down to p.linkrev() if it
             # isn't an ancestor of the srcrev.
             f._changeid
             pl = f.parents()
 
             # Don't return renamed parents if we aren't following.
             if not follow:
                 pl = [p for p in pl if p.path() == f.path()]
 
             # renamed filectx won't have a filelog yet, so set it
             # from the cache to save time
             for p in pl:
                 if not '_filelog' in p.__dict__:
                     p._filelog = getlog(p.path())
 
             return pl
 
         # use linkrev to find the first changeset where self appeared
         base = self
         introrev = self.introrev()
         if self.rev() != introrev:
             base = self.filectx(self.filenode(), changeid=introrev)
         if getattr(base, '_ancestrycontext', None) is None:
             cl = self._repo.changelog
             if introrev is None:
                 # wctx is not inclusive, but works because _ancestrycontext
                 # is used to test filelog revisions
                 ac = cl.ancestors([p.rev() for p in base.parents()],
                                   inclusive=True)
             else:
                 ac = cl.ancestors([introrev], inclusive=True)
             base._ancestrycontext = ac
 
         # This algorithm would prefer to be recursive, but Python is a
         # bit recursion-hostile. Instead we do an iterative
         # depth-first search.
 
         # 1st DFS pre-calculates pcache and needed
         visit = [base]
         pcache = {}
         needed = {base: 1}
         while visit:
             f = visit.pop()
             if f in pcache:
                 continue
             pl = parents(f)
             pcache[f] = pl
             for p in pl:
                 needed[p] = needed.get(p, 0) + 1
                 if p not in pcache:
                     visit.append(p)
 
         # 2nd DFS does the actual annotate
         visit[:] = [base]
         hist = {}
         while visit:
             f = visit[-1]
             if f in hist:
                 visit.pop()
                 continue
 
             ready = True
             pl = pcache[f]
             for p in pl:
                 if p not in hist:
                     ready = False
                     visit.append(p)
             if ready:
                 visit.pop()
                 curr = decorate(f.data(), f)
                 skipchild = False
                 if skiprevs is not None:
                     skipchild = f._changeid in skiprevs
                 curr = _annotatepair([hist[p] for p in pl], f, curr, skipchild,
                                      diffopts)
                 for p in pl:
                     if needed[p] == 1:
                         del hist[p]
                         del needed[p]
                     else:
                         needed[p] -= 1
 
                 hist[f] = curr
                 del pcache[f]
 
         return zip(hist[base][0], hist[base][1].splitlines(True))
 
     def ancestors(self, followfirst=False):
         visit = {}
         c = self
         if followfirst:
             cut = 1
         else:
             cut = None
 
         while True:
             for parent in c.parents()[:cut]:
                 visit[(parent.linkrev(), parent.filenode())] = parent
             if not visit:
                 break
             c = visit.pop(max(visit))
             yield c
 
     def decodeddata(self):
         """Returns `data()` after running repository decoding filters.
 
         This is often equivalent to how the data would be expressed on disk.
         """
         return self._repo.wwritedata(self.path(), self.data())
 
+@attr.s(slots=True, frozen=True)
+class annotateline(object):
+    fctx = attr.ib()
+    lineno = attr.ib(default=False)
+
 def _annotatepair(parents, childfctx, child, skipchild, diffopts):
     r'''
     Given parent and child fctxes and annotate data for parents, for all lines
     in either parent that match the child, annotate the child with the parent's
     data.
 
     Additionally, if `skipchild` is True, replace all other lines with parent
     annotate data as well such that child is never blamed for any lines.
 
     See test-annotate.py for unit tests.
     '''
     pblocks = [(parent, mdiff.allblocks(parent[1], child[1], opts=diffopts))
                for parent in parents]
 
     if skipchild:
         # Need to iterate over the blocks twice -- make it a list
         pblocks = [(p, list(blocks)) for (p, blocks) in pblocks]
     # Mercurial currently prefers p2 over p1 for annotate.
     # TODO: change this?
     for parent, blocks in pblocks:
         for (a1, a2, b1, b2), t in blocks:
             # Changed blocks ('!') or blocks made only of blank lines ('~')
             # belong to the child.
             if t == '=':
                 child[0][b1:b2] = parent[0][a1:a2]
 
     if skipchild:
         # Now try and match up anything that couldn't be matched,
         # Reversing pblocks maintains bias towards p2, matching above
         # behavior.
         pblocks.reverse()
 
         # The heuristics are:
         # * Work on blocks of changed lines (effectively diff hunks with -U0).
         # This could potentially be smarter but works well enough.
         # * For a non-matching section, do a best-effort fit. Match lines in
         #   diff hunks 1:1, dropping lines as necessary.
         # * Repeat the last line as a last resort.
 
         # First, replace as much as possible without repeating the last line.
         remaining = [(parent, []) for parent, _blocks in pblocks]
         for idx, (parent, blocks) in enumerate(pblocks):
             for (a1, a2, b1, b2), _t in blocks:
                 if a2 - a1 >= b2 - b1:
                     for bk in xrange(b1, b2):
-                        if child[0][bk][0] == childfctx:
+                        if child[0][bk].fctx == childfctx:
                             ak = min(a1 + (bk - b1), a2 - 1)
                             child[0][bk] = parent[0][ak]
                 else:
                     remaining[idx][1].append((a1, a2, b1, b2))
 
         # Then, look at anything left, which might involve repeating the last
         # line.
         for parent, blocks in remaining:
             for a1, a2, b1, b2 in blocks:
                 for bk in xrange(b1, b2):
-                    if child[0][bk][0] == childfctx:
+                    if child[0][bk].fctx == childfctx:
                         ak = min(a1 + (bk - b1), a2 - 1)
                         child[0][bk] = parent[0][ak]
     return child
 
 class filectx(basefilectx):
     """A filecontext object makes access to data related to a particular
        filerevision convenient."""
     def __init__(self, repo, path, changeid=None, fileid=None,
                  filelog=None, changectx=None):
         """changeid can be a changeset revision, node, or tag.
            fileid can be a file revision or node."""
         self._repo = repo
         self._path = path
 
         assert (changeid is not None
                 or fileid is not None
                 or changectx is not None), \
                 ("bad args: changeid=%r, fileid=%r, changectx=%r"
                  % (changeid, fileid, changectx))
 
         if filelog is not None:
             self._filelog = filelog
 
         if changeid is not None:
             self._changeid = changeid
         if changectx is not None:
             self._changectx = changectx
         if fileid is not None:
             self._fileid = fileid
 
     @propertycache
     def _changectx(self):
         try:
             return changectx(self._repo, self._changeid)
         except error.FilteredRepoLookupError:
             # Linkrev may point to any revision in the repository.  When the
             # repository is filtered this may lead to `filectx` trying to build
             # `changectx` for filtered revision. In such case we fallback to
             # creating `changectx` on the unfiltered version of the reposition.
             # This fallback should not be an issue because `changectx` from
             # `filectx` are not used in complex operations that care about
             # filtering.
             #
             # This fallback is a cheap and dirty fix that prevent several
             # crashes. It does not ensure the behavior is correct. However the
             # behavior was not correct before filtering either and "incorrect
             # behavior" is seen as better as "crash"
             #
             # Linkrevs have several serious troubles with filtering that are
             # complicated to solve. Proper handling of the issue here should be
             # considered when solving linkrev issue are on the table.
             return changectx(self._repo.unfiltered(), self._changeid)
 
     def filectx(self, fileid, changeid=None):
         '''opens an arbitrary revision of the file without
         opening a new filelog'''
         return filectx(self._repo, self._path, fileid=fileid,
                        filelog=self._filelog, changeid=changeid)
 
     def rawdata(self):
         return self._filelog.revision(self._filenode, raw=True)
 
     def rawflags(self):
         """low-level revlog flags"""
         return self._filelog.flags(self._filerev)
 
     def data(self):
         try:
             return self._filelog.read(self._filenode)
         except error.CensoredNodeError:
             if self._repo.ui.config("censor", "policy") == "ignore":
                 return ""
             raise error.Abort(_("censored node: %s") % short(self._filenode),
                              hint=_("set censor.policy to ignore errors"))
 
     def size(self):
         return self._filelog.size(self._filerev)
 
     @propertycache
     def _copied(self):
         """check if file was actually renamed in this changeset revision
 
         If rename logged in file revision, we report copy for changeset only
         if file revisions linkrev points back to the changeset in question
         or both changeset parents contain different file revisions.
         """
 
         renamed = self._filelog.renamed(self._filenode)
         if not renamed:
             return renamed
 
         if self.rev() == self.linkrev():
             return renamed
 
         name = self.path()
         fnode = self._filenode
         for p in self._changectx.parents():
             try:
                 if fnode == p.filenode(name):
                     return None
             except error.LookupError:
                 pass
         return renamed
 
     def children(self):
         # hard for renames
         c = self._filelog.children(self._filenode)
         return [filectx(self._repo, self._path, fileid=x,
                         filelog=self._filelog) for x in c]
 
 class committablectx(basectx):
     """A committablectx object provides common functionality for a context that
     wants the ability to commit, e.g. workingctx or memctx."""
     def __init__(self, repo, text="", user=None, date=None, extra=None,
                  changes=None):
         self._repo = repo
         self._rev = None
         self._node = None
         self._text = text
         if date:
             self._date = util.parsedate(date)
         if user:
             self._user = user
         if changes:
             self._status = changes
 
         self._extra = {}
         if extra:
             self._extra = extra.copy()
         if 'branch' not in self._extra:
             try:
                 branch = encoding.fromlocal(self._repo.dirstate.branch())
             except UnicodeDecodeError:
                 raise error.Abort(_('branch name not in UTF-8!'))
             self._extra['branch'] = branch
         if self._extra['branch'] == '':
             self._extra['branch'] = 'default'
 
     def __bytes__(self):
         return bytes(self._parents[0]) + "+"
 
     __str__ = encoding.strmethod(__bytes__)
 
     def __nonzero__(self):
         return True
 
     __bool__ = __nonzero__
 
     def _buildflagfunc(self):
         # Create a fallback function for getting file flags when the
         # filesystem doesn't support them
 
         copiesget = self._repo.dirstate.copies().get
         parents = self.parents()
         if len(parents) < 2:
             # when we have one parent, it's easy: copy from parent
             man = parents[0].manifest()
             def func(f):
                 f = copiesget(f, f)
                 return man.flags(f)
         else:
             # merges are tricky: we try to reconstruct the unstored
             # result from the merge (issue1802)
             p1, p2 = parents
             pa = p1.ancestor(p2)
             m1, m2, ma = p1.manifest(), p2.manifest(), pa.manifest()
 
             def func(f):
                 f = copiesget(f, f) # may be wrong for merges with copies
                 fl1, fl2, fla = m1.flags(f), m2.flags(f), ma.flags(f)
                 if fl1 == fl2:
                     return fl1
                 if fl1 == fla:
                     return fl2
                 if fl2 == fla:
                     return fl1
                 return '' # punt for conflicts
 
         return func
 
     @propertycache
     def _flagfunc(self):
         return self._repo.dirstate.flagfunc(self._buildflagfunc)
 
     @propertycache
     def _status(self):
         return self._repo.status()
 
     @propertycache
     def _user(self):
         return self._repo.ui.username()
 
     @propertycache
     def _date(self):
         ui = self._repo.ui
         date = ui.configdate('devel', 'default-date')
         if date is None:
             date = util.makedate()
         return date
 
     def subrev(self, subpath):
         return None
 
     def manifestnode(self):
         return None
     def user(self):
         return self._user or self._repo.ui.username()
     def date(self):
         return self._date
     def description(self):
         return self._text
     def files(self):
         return sorted(self._status.modified + self._status.added +
                       self._status.removed)
 
     def modified(self):
         return self._status.modified
     def added(self):
         return self._status.added
     def removed(self):
         return self._status.removed
     def deleted(self):
         return self._status.deleted
     def branch(self):
         return encoding.tolocal(self._extra['branch'])
     def closesbranch(self):
         return 'close' in self._extra
     def extra(self):
         return self._extra
 
     def tags(self):
         return []
 
     def bookmarks(self):
         b = []
         for p in self.parents():
             b.extend(p.bookmarks())
         return b
 
     def phase(self):
         phase = phases.draft # default phase to draft
         for p in self.parents():
             phase = max(phase, p.phase())
         return phase
 
     def hidden(self):
         return False
 
     def children(self):
         return []
 
     def flags(self, path):
         if r'_manifest' in self.__dict__:
             try:
                 return self._manifest.flags(path)
             except KeyError:
                 return ''
 
         try:
             return self._flagfunc(path)
         except OSError:
             return ''
 
     def ancestor(self, c2):
         """return the "best" ancestor context of self and c2"""
         return self._parents[0].ancestor(c2) # punt on two parents for now
 
     def walk(self, match):
         '''Generates matching file names.'''
         return sorted(self._repo.dirstate.walk(match,
                                                subrepos=sorted(self.substate),
                                                unknown=True, ignored=False))
 
     def matches(self, match):
         return sorted(self._repo.dirstate.matches(match))
 
     def ancestors(self):
         for p in self._parents:
             yield p
         for a in self._repo.changelog.ancestors(
             [p.rev() for p in self._parents]):
             yield changectx(self._repo, a)
 
     def markcommitted(self, node):
         """Perform post-commit cleanup necessary after committing this ctx
 
         Specifically, this updates backing stores this working context
         wraps to reflect the fact that the changes reflected by this
         workingctx have been committed.  For example, it marks
         modified and added files as normal in the dirstate.
 
         """
 
         with self._repo.dirstate.parentchange():
             for f in self.modified() + self.added():
                 self._repo.dirstate.normal(f)
             for f in self.removed():
                 self._repo.dirstate.drop(f)
             self._repo.dirstate.setparents(node)
 
         # write changes out explicitly, because nesting wlock at
         # runtime may prevent 'wlock.release()' in 'repo.commit()'
         # from immediately doing so for subsequent changing files
         self._repo.dirstate.write(self._repo.currenttransaction())
 
     def dirty(self, missing=False, merge=True, branch=True):
         return False
 
 class workingctx(committablectx):
     """A workingctx object makes access to data related to
     the current working directory convenient.
     date - any valid date string or (unixtime, offset), or None.
     user - username string, or None.
     extra - a dictionary of extra values, or None.
     changes - a list of file lists as returned by localrepo.status()
                or None to use the repository status.
     """
     def __init__(self, repo, text="", user=None, date=None, extra=None,
                  changes=None):
         super(workingctx, self).__init__(repo, text, user, date, extra, changes)
 
     def __iter__(self):
         d = self._repo.dirstate
         for f in d:
             if d[f] != 'r':
                 yield f
 
     def __contains__(self, key):
         return self._repo.dirstate[key] not in "?r"
 
     def hex(self):
         return hex(wdirid)
 
     @propertycache
     def _parents(self):
         p = self._repo.dirstate.parents()
         if p[1] == nullid:
             p = p[:-1]
         return [changectx(self._repo, x) for x in p]
 
     def filectx(self, path, filelog=None):
         """get a file context from the working directory"""
         return workingfilectx(self._repo, path, workingctx=self,
                               filelog=filelog)
 
     def dirty(self, missing=False, merge=True, branch=True):
         "check whether a working directory is modified"
         # check subrepos first
         for s in sorted(self.substate):
             if self.sub(s).dirty(missing=missing):
                 return True
         # check current working dir
         return ((merge and self.p2()) or
                 (branch and self.branch() != self.p1().branch()) or
                 self.modified() or self.added() or self.removed() or
                 (missing and self.deleted()))
 
     def add(self, list, prefix=""):
         with self._repo.wlock():
             ui, ds = self._repo.ui, self._repo.dirstate
             uipath = lambda f: ds.pathto(pathutil.join(prefix, f))
             rejected = []
             lstat = self._repo.wvfs.lstat
             for f in list:
                 # ds.pathto() returns an absolute file when this is invoked from
                 # the keyword extension.  That gets flagged as non-portable on
                 # Windows, since it contains the drive letter and colon.
                 scmutil.checkportable(ui, os.path.join(prefix, f))
                 try:
                     st = lstat(f)
                 except OSError:
                     ui.warn(_("%s does not exist!\n") % uipath(f))
                     rejected.append(f)
                     continue
                 if st.st_size > 10000000:
                     ui.warn(_("%s: up to %d MB of RAM may be required "
                               "to manage this file\n"
                               "(use 'hg revert %s' to cancel the "
                               "pending addition)\n")
                             % (f, 3 * st.st_size // 1000000, uipath(f)))
                 if not (stat.S_ISREG(st.st_mode) or stat.S_ISLNK(st.st_mode)):
                     ui.warn(_("%s not added: only files and symlinks "
                               "supported currently\n") % uipath(f))
                     rejected.append(f)
                 elif ds[f] in 'amn':
                     ui.warn(_("%s already tracked!\n") % uipath(f))
                 elif ds[f] == 'r':
                     ds.normallookup(f)
                 else:
                     ds.add(f)
             return rejected
 
     def forget(self, files, prefix=""):
         with self._repo.wlock():
             ds = self._repo.dirstate
             uipath = lambda f: ds.pathto(pathutil.join(prefix, f))
             rejected = []
             for f in files:
                 if f not in self._repo.dirstate:
                     self._repo.ui.warn(_("%s not tracked!\n") % uipath(f))
                     rejected.append(f)
                 elif self._repo.dirstate[f] != 'a':
                     self._repo.dirstate.remove(f)
                 else:
                     self._repo.dirstate.drop(f)
             return rejected
 
     def undelete(self, list):
         pctxs = self.parents()
         with self._repo.wlock():
             ds = self._repo.dirstate
             for f in list:
                 if self._repo.dirstate[f] != 'r':
                     self._repo.ui.warn(_("%s not removed!\n") % ds.pathto(f))
                 else:
                     fctx = f in pctxs[0] and pctxs[0][f] or pctxs[1][f]
                     t = fctx.data()
                     self._repo.wwrite(f, t, fctx.flags())
                     self._repo.dirstate.normal(f)
 
     def copy(self, source, dest):
         try:
             st = self._repo.wvfs.lstat(dest)
         except OSError as err:
             if err.errno != errno.ENOENT:
                 raise
             self._repo.ui.warn(_("%s does not exist!\n")
                                % self._repo.dirstate.pathto(dest))
             return
         if not (stat.S_ISREG(st.st_mode) or stat.S_ISLNK(st.st_mode)):
             self._repo.ui.warn(_("copy failed: %s is not a file or a "
                                  "symbolic link\n")
                                % self._repo.dirstate.pathto(dest))
         else:
             with self._repo.wlock():
                 if self._repo.dirstate[dest] in '?':
                     self._repo.dirstate.add(dest)
                 elif self._repo.dirstate[dest] in 'r':
                     self._repo.dirstate.normallookup(dest)
                 self._repo.dirstate.copy(source, dest)
 
     def match(self, pats=None, include=None, exclude=None, default='glob',
               listsubrepos=False, badfn=None):
         r = self._repo
 
         # Only a case insensitive filesystem needs magic to translate user input
         # to actual case in the filesystem.
         icasefs = not util.fscasesensitive(r.root)
         return matchmod.match(r.root, r.getcwd(), pats, include, exclude,
                               default, auditor=r.auditor, ctx=self,
                               listsubrepos=listsubrepos, badfn=badfn,
                               icasefs=icasefs)
 
     def flushall(self):
         pass # For overlayworkingfilectx compatibility.
 
     def _filtersuspectsymlink(self, files):
         if not files or self._repo.dirstate._checklink:
             return files
 
         # Symlink placeholders may get non-symlink-like contents
         # via user error or dereferencing by NFS or Samba servers,
         # so we filter out any placeholders that don't look like a
         # symlink
         sane = []
         for f in files:
             if self.flags(f) == 'l':
                 d = self[f].data()
                 if d == '' or len(d) >= 1024 or '\n' in d or util.binary(d):
                     self._repo.ui.debug('ignoring suspect symlink placeholder'
                                         ' "%s"\n' % f)
                     continue
             sane.append(f)
         return sane
 
     def _checklookup(self, files):
         # check for any possibly clean files
         if not files:
             return [], [], []
 
         modified = []
         deleted = []
         fixup = []
         pctx = self._parents[0]
         # do a full compare of any files that might have changed
         for f in sorted(files):
             try:
                 # This will return True for a file that got replaced by a
                 # directory in the interim, but fixing that is pretty hard.
                 if (f not in pctx or self.flags(f) != pctx.flags(f)
                     or pctx[f].cmp(self[f])):
                     modified.append(f)
                 else:
                     fixup.append(f)
             except (IOError, OSError):
                 # A file become inaccessible in between? Mark it as deleted,
                 # matching dirstate behavior (issue5584).
                 # The dirstate has more complex behavior around whether a
                 # missing file matches a directory, etc, but we don't need to
                 # bother with that: if f has made it to this point, we're sure
                 # it's in the dirstate.
                 deleted.append(f)
 
         return modified, deleted, fixup
 
     def _poststatusfixup(self, status, fixup):
         """update dirstate for files that are actually clean"""
         poststatus = self._repo.postdsstatus()
         if fixup or poststatus:
             try:
                 oldid = self._repo.dirstate.identity()
 
                 # updating the dirstate is optional
                 # so we don't wait on the lock
                 # wlock can invalidate the dirstate, so cache normal _after_
                 # taking the lock
                 with self._repo.wlock(False):
                     if self._repo.dirstate.identity() == oldid:
                         if fixup:
                             normal = self._repo.dirstate.normal
                             for f in fixup:
                                 normal(f)
                             # write changes out explicitly, because nesting
                             # wlock at runtime may prevent 'wlock.release()'
                             # after this block from doing so for subsequent
                             # changing files
                             tr = self._repo.currenttransaction()
                             self._repo.dirstate.write(tr)
 
                         if poststatus:
                             for ps in poststatus:
                                 ps(self, status)
                     else:
                         # in this case, writing changes out breaks
                         # consistency, because .hg/dirstate was
                         # already changed simultaneously after last
                         # caching (see also issue5584 for detail)
                         self._repo.ui.debug('skip updating dirstate: '
                                             'identity mismatch\n')
             except error.LockError:
                 pass
             finally:
                 # Even if the wlock couldn't be grabbed, clear out the list.
                 self._repo.clearpostdsstatus()
 
     def _dirstatestatus(self, match, ignored=False, clean=False, unknown=False):
         '''Gets the status from the dirstate -- internal use only.'''
         subrepos = []
         if '.hgsub' in self:
             subrepos = sorted(self.substate)
         cmp, s = self._repo.dirstate.status(match, subrepos, ignored=ignored,
                                             clean=clean, unknown=unknown)
 
         # check for any possibly clean files
         fixup = []
         if cmp:
             modified2, deleted2, fixup = self._checklookup(cmp)
             s.modified.extend(modified2)
             s.deleted.extend(deleted2)
 
             if fixup and clean:
                 s.clean.extend(fixup)
 
         self._poststatusfixup(s, fixup)
 
         if match.always():
             # cache for performance
             if s.unknown or s.ignored or s.clean:
                 # "_status" is cached with list*=False in the normal route
                 self._status = scmutil.status(s.modified, s.added, s.removed,
                                               s.deleted, [], [], [])
             else:
                 self._status = s
 
         return s
 
     @propertycache
     def _manifest(self):
         """generate a manifest corresponding to the values in self._status
 
         This reuse the file nodeid from parent, but we use special node
         identifiers for added and modified files. This is used by manifests
         merge to see that files are different and by update logic to avoid
         deleting newly added files.
         """
         return self._buildstatusmanifest(self._status)
 
     def _buildstatusmanifest(self, status):
         """Builds a manifest that includes the given status results."""
         parents = self.parents()
 
         man = parents[0].manifest().copy()
 
         ff = self._flagfunc
         for i, l in ((addednodeid, status.added),
                      (modifiednodeid, status.modified)):
             for f in l:
                 man[f] = i
                 try:
                     man.setflag(f, ff(f))
                 except OSError:
                     pass
 
         for f in status.deleted + status.removed:
             if f in man:
                 del man[f]
 
         return man
 
     def _buildstatus(self, other, s, match, listignored, listclean,
                      listunknown):
         """build a status with respect to another context
 
         This includes logic for maintaining the fast path of status when
         comparing the working directory against its parent, which is to skip
         building a new manifest if self (working directory) is not comparing
         against its parent (repo['.']).
         """
         s = self._dirstatestatus(match, listignored, listclean, listunknown)
         # Filter out symlinks that, in the case of FAT32 and NTFS filesystems,
         # might have accidentally ended up with the entire contents of the file
         # they are supposed to be linking to.
         s.modified[:] = self._filtersuspectsymlink(s.modified)
         if other != self._repo['.']:
             s = super(workingctx, self)._buildstatus(other, s, match,
                                                      listignored, listclean,
                                                      listunknown)
         return s
 
     def _matchstatus(self, other, match):
         """override the match method with a filter for directory patterns
 
         We use inheritance to customize the match.bad method only in cases of
         workingctx since it belongs only to the working directory when
         comparing against the parent changeset.
 
         If we aren't comparing against the working directory's parent, then we
         just use the default match object sent to us.
         """
         if other != self._repo['.']:
             def bad(f, msg):
                 # 'f' may be a directory pattern from 'match.files()',
                 # so 'f not in ctx1' is not enough
                 if f not in other and not other.hasdir(f):
                     self._repo.ui.warn('%s: %s\n' %
                                        (self._repo.dirstate.pathto(f), msg))
             match.bad = bad
         return match
 
     def markcommitted(self, node):
         super(workingctx, self).markcommitted(node)
 
         sparse.aftercommit(self._repo, node)
 
 class committablefilectx(basefilectx):
     """A committablefilectx provides common functionality for a file context
     that wants the ability to commit, e.g. workingfilectx or memfilectx."""
     def __init__(self, repo, path, filelog=None, ctx=None):
         self._repo = repo
         self._path = path
         self._changeid = None
         self._filerev = self._filenode = None
 
         if filelog is not None:
             self._filelog = filelog
         if ctx:
             self._changectx = ctx
 
     def __nonzero__(self):
         return True
 
     __bool__ = __nonzero__
 
     def linkrev(self):
         # linked to self._changectx no matter if file is modified or not
         return self.rev()
 
     def parents(self):
         '''return parent filectxs, following copies if necessary'''
         def filenode(ctx, path):
             return ctx._manifest.get(path, nullid)
 
         path = self._path
         fl = self._filelog
         pcl = self._changectx._parents
         renamed = self.renamed()
 
         if renamed:
             pl = [renamed + (None,)]
         else:
             pl = [(path, filenode(pcl[0], path), fl)]
 
         for pc in pcl[1:]:
             pl.append((path, filenode(pc, path), fl))
 
         return [self._parentfilectx(p, fileid=n, filelog=l)
                 for p, n, l in pl if n != nullid]
 
     def children(self):
         return []
 
 class workingfilectx(committablefilectx):
     """A workingfilectx object makes access to data related to a particular
        file in the working directory convenient."""
     def __init__(self, repo, path, filelog=None, workingctx=None):
         super(workingfilectx, self).__init__(repo, path, filelog, workingctx)
 
     @propertycache
     def _changectx(self):
         return workingctx(self._repo)
 
     def data(self):
         return self._repo.wread(self._path)
     def renamed(self):
         rp = self._repo.dirstate.copied(self._path)
         if not rp:
             return None
         return rp, self._changectx._parents[0]._manifest.get(rp, nullid)
 
     def size(self):
         return self._repo.wvfs.lstat(self._path).st_size
     def date(self):
         t, tz = self._changectx.date()
         try:
             return (self._repo.wvfs.lstat(self._path).st_mtime, tz)
         except OSError as err:
             if err.errno != errno.ENOENT:
                 raise
             return (t, tz)
 
     def exists(self):
         return self._repo.wvfs.exists(self._path)
 
     def lexists(self):
         return self._repo.wvfs.lexists(self._path)
 
     def audit(self):
         return self._repo.wvfs.audit(self._path)
 
     def cmp(self, fctx):
         """compare with other file context
 
         returns True if different than fctx.
         """
         # fctx should be a filectx (not a workingfilectx)
         # invert comparison to reuse the same code path
         return fctx.cmp(self)
 
     def remove(self, ignoremissing=False):
         """wraps unlink for a repo's working directory"""
         self._repo.wvfs.unlinkpath(self._path, ignoremissing=ignoremissing)
 
     def write(self, data, flags, backgroundclose=False):
         """wraps repo.wwrite"""
         self._repo.wwrite(self._path, data, flags,
                           backgroundclose=backgroundclose)
 
     def clearunknown(self):
         """Removes conflicting items in the working directory so that
         ``write()`` can be called successfully.
         """
         wvfs = self._repo.wvfs
         if wvfs.isdir(self._path) and not wvfs.islink(self._path):
             wvfs.removedirs(self._path)
 
     def setflags(self, l, x):
         self._repo.wvfs.setflags(self._path, l, x)
 
 class overlayworkingctx(workingctx):
     """Wraps another mutable context with a write-back cache that can be flushed
     at a later time.
 
     self._cache[path] maps to a dict with keys: {
         'exists': bool?
         'date': date?
         'data': str?
         'flags': str?
     }
     If `exists` is True, `flags` must be non-None and 'date' is non-None. If it
     is `False`, the file was deleted.
     """
 
     def __init__(self, repo, wrappedctx):
         super(overlayworkingctx, self).__init__(repo)
         self._repo = repo
         self._wrappedctx = wrappedctx
         self._clean()
 
     def data(self, path):
         if self.isdirty(path):
             if self._cache[path]['exists']:
                 if self._cache[path]['data']:
                     return self._cache[path]['data']
                 else:
                     # Must fallback here, too, because we only set flags.
                     return self._wrappedctx[path].data()
             else:
                 raise error.ProgrammingError("No such file or directory: %s" %
                                              self._path)
         else:
             return self._wrappedctx[path].data()
 
     def filedate(self, path):
         if self.isdirty(path):
             return self._cache[path]['date']
         else:
             return self._wrappedctx[path].date()
 
     def flags(self, path):
         if self.isdirty(path):
             if self._cache[path]['exists']:
                 return self._cache[path]['flags']
             else:
                 raise error.ProgrammingError("No such file or directory: %s" %
                                              self._path)
         else:
             return self._wrappedctx[path].flags()
 
     def write(self, path, data, flags=''):
         if data is None:
             raise error.ProgrammingError("data must be non-None")
         self._markdirty(path, exists=True, data=data, date=util.makedate(),
                         flags=flags)
 
     def setflags(self, path, l, x):
         self._markdirty(path, exists=True, date=util.makedate(),
                         flags=(l and 'l' or '') + (x and 'x' or ''))
 
     def remove(self, path):
         self._markdirty(path, exists=False)
 
     def exists(self, path):
         """exists behaves like `lexists`, but needs to follow symlinks and
         return False if they are broken.
         """
         if self.isdirty(path):
             # If this path exists and is a symlink, "follow" it by calling
             # exists on the destination path.
             if (self._cache[path]['exists'] and
                         'l' in self._cache[path]['flags']):
                 return self.exists(self._cache[path]['data'].strip())
             else:
                 return self._cache[path]['exists']
         return self._wrappedctx[path].exists()
 
     def lexists(self, path):
         """lexists returns True if the path exists"""
         if self.isdirty(path):
             return self._cache[path]['exists']
         return self._wrappedctx[path].lexists()
 
     def size(self, path):
         if self.isdirty(path):
             if self._cache[path]['exists']:
                 return len(self._cache[path]['data'])
             else:
                 raise error.ProgrammingError("No such file or directory: %s" %
                                              self._path)
         return self._wrappedctx[path].size()
 
     def flushall(self):
         for path in self._writeorder:
             entry = self._cache[path]
             if entry['exists']:
                 self._wrappedctx[path].clearunknown()
                 if entry['data'] is not None:
                     if entry['flags'] is None:
                         raise error.ProgrammingError('data set but not flags')
                     self._wrappedctx[path].write(
                         entry['data'],
                         entry['flags'])
                 else:
                     self._wrappedctx[path].setflags(
                         'l' in entry['flags'],
                         'x' in entry['flags'])
             else:
                 self._wrappedctx[path].remove(path)
         self._clean()
 
     def isdirty(self, path):
         return path in self._cache
 
     def _clean(self):
         self._cache = {}
         self._writeorder = []
 
     def _markdirty(self, path, exists, data=None, date=None, flags=''):
         if path not in self._cache:
             self._writeorder.append(path)
 
         self._cache[path] = {
             'exists': exists,
             'data': data,
             'date': date,
             'flags': flags,
         }
 
     def filectx(self, path, filelog=None):
         return overlayworkingfilectx(self._repo, path, parent=self,
                                      filelog=filelog)
 
 class overlayworkingfilectx(workingfilectx):
     """Wrap a ``workingfilectx`` but intercepts all writes into an in-memory
     cache, which can be flushed through later by calling ``flush()``."""
 
     def __init__(self, repo, path, filelog=None, parent=None):
         super(overlayworkingfilectx, self).__init__(repo, path, filelog,
                                                     parent)
         self._repo = repo
         self._parent = parent
         self._path = path
 
     def ctx(self):
         return self._parent
 
     def data(self):
         return self._parent.data(self._path)
 
     def date(self):
         return self._parent.filedate(self._path)
 
     def exists(self):
         return self.lexists()
 
     def lexists(self):
         return self._parent.exists(self._path)
 
     def renamed(self):
         # Copies are currently tracked in the dirstate as before. Straight copy
         # from workingfilectx.
         rp = self._repo.dirstate.copied(self._path)
         if not rp:
             return None
         return rp, self._changectx._parents[0]._manifest.get(rp, nullid)
 
     def size(self):
         return self._parent.size(self._path)
 
     def audit(self):
         pass
 
     def flags(self):
         return self._parent.flags(self._path)
 
     def setflags(self, islink, isexec):
         return self._parent.setflags(self._path, islink, isexec)
 
     def write(self, data, flags, backgroundclose=False):
         return self._parent.write(self._path, data, flags)
 
     def remove(self, ignoremissing=False):
         return self._parent.remove(self._path)
 
 class workingcommitctx(workingctx):
     """A workingcommitctx object makes access to data related to
     the revision being committed convenient.
 
     This hides changes in the working directory, if they aren't
     committed in this context.
     """
     def __init__(self, repo, changes,
                  text="", user=None, date=None, extra=None):
         super(workingctx, self).__init__(repo, text, user, date, extra,
                                          changes)
 
     def _dirstatestatus(self, match, ignored=False, clean=False, unknown=False):
         """Return matched files only in ``self._status``
 
         Uncommitted files appear "clean" via this context, even if
         they aren't actually so in the working directory.
         """
         if clean:
             clean = [f for f in self._manifest if f not in self._changedset]
         else:
             clean = []
         return scmutil.status([f for f in self._status.modified if match(f)],
                               [f for f in self._status.added if match(f)],
                               [f for f in self._status.removed if match(f)],
                               [], [], [], clean)
 
     @propertycache
     def _changedset(self):
         """Return the set of files changed in this context
         """
         changed = set(self._status.modified)
         changed.update(self._status.added)
         changed.update(self._status.removed)
         return changed
 
 def makecachingfilectxfn(func):
     """Create a filectxfn that caches based on the path.
 
     We can't use util.cachefunc because it uses all arguments as the cache
     key and this creates a cycle since the arguments include the repo and
     memctx.
     """
     cache = {}
 
     def getfilectx(repo, memctx, path):
         if path not in cache:
             cache[path] = func(repo, memctx, path)
         return cache[path]
 
     return getfilectx
 
 def memfilefromctx(ctx):
     """Given a context return a memfilectx for ctx[path]
 
     This is a convenience method for building a memctx based on another
     context.
     """
     def getfilectx(repo, memctx, path):
         fctx = ctx[path]
         # this is weird but apparently we only keep track of one parent
         # (why not only store that instead of a tuple?)
         copied = fctx.renamed()
         if copied:
             copied = copied[0]
         return memfilectx(repo, path, fctx.data(),
                           islink=fctx.islink(), isexec=fctx.isexec(),
                           copied=copied, memctx=memctx)
 
     return getfilectx
 
 def memfilefrompatch(patchstore):
     """Given a patch (e.g. patchstore object) return a memfilectx
 
     This is a convenience method for building a memctx based on a patchstore.
     """
     def getfilectx(repo, memctx, path):
         data, mode, copied = patchstore.getfile(path)
         if data is None:
             return None
         islink, isexec = mode
         return memfilectx(repo, path, data, islink=islink,
                           isexec=isexec, copied=copied,
                           memctx=memctx)
 
     return getfilectx
 
 class memctx(committablectx):
     """Use memctx to perform in-memory commits via localrepo.commitctx().
 
     Revision information is supplied at initialization time while
     related files data and is made available through a callback
     mechanism.  'repo' is the current localrepo, 'parents' is a
     sequence of two parent revisions identifiers (pass None for every
     missing parent), 'text' is the commit message and 'files' lists
     names of files touched by the revision (normalized and relative to
     repository root).
 
     filectxfn(repo, memctx, path) is a callable receiving the
     repository, the current memctx object and the normalized path of
     requested file, relative to repository root. It is fired by the
     commit function for every file in 'files', but calls order is
     undefined. If the file is available in the revision being
     committed (updated or added), filectxfn returns a memfilectx
     object. If the file was removed, filectxfn return None for recent
     Mercurial. Moved files are represented by marking the source file
     removed and the new file added with copy information (see
     memfilectx).
 
     user receives the committer name and defaults to current
     repository username, date is the commit date in any format
     supported by util.parsedate() and defaults to current date, extra
     is a dictionary of metadata or is left empty.
     """
 
     # Mercurial <= 3.1 expects the filectxfn to raise IOError for missing files.
     # Extensions that need to retain compatibility across Mercurial 3.1 can use
     # this field to determine what to do in filectxfn.
     _returnnoneformissingfiles = True
 
     def __init__(self, repo, parents, text, files, filectxfn, user=None,
                  date=None, extra=None, branch=None, editor=False):
         super(memctx, self).__init__(repo, text, user, date, extra)
         self._rev = None
         self._node = None
         parents = [(p or nullid) for p in parents]
         p1, p2 = parents
         self._parents = [changectx(self._repo, p) for p in (p1, p2)]
         files = sorted(set(files))
         self._files = files
         if branch is not None:
             self._extra['branch'] = encoding.fromlocal(branch)
         self.substate = {}
 
         if isinstance(filectxfn, patch.filestore):
             filectxfn = memfilefrompatch(filectxfn)
         elif not callable(filectxfn):
             # if store is not callable, wrap it in a function
             filectxfn = memfilefromctx(filectxfn)
 
         # memoizing increases performance for e.g. vcs convert scenarios.
         self._filectxfn = makecachingfilectxfn(filectxfn)
 
         if editor:
             self._text = editor(self._repo, self, [])
             self._repo.savecommitmessage(self._text)
 
     def filectx(self, path, filelog=None):
         """get a file context from the working directory
 
         Returns None if file doesn't exist and should be removed."""
         return self._filectxfn(self._repo, self, path)
 
     def commit(self):
         """commit context to the repo"""
         return self._repo.commitctx(self)
 
     @propertycache
     def _manifest(self):
         """generate a manifest based on the return values of filectxfn"""
 
         # keep this simple for now; just worry about p1
         pctx = self._parents[0]
         man = pctx.manifest().copy()
 
         for f in self._status.modified:
             p1node = nullid
             p2node = nullid
             p = pctx[f].parents() # if file isn't in pctx, check p2?
             if len(p) > 0:
                 p1node = p[0].filenode()
                 if len(p) > 1:
                     p2node = p[1].filenode()
             man[f] = revlog.hash(self[f].data(), p1node, p2node)
 
         for f in self._status.added:
             man[f] = revlog.hash(self[f].data(), nullid, nullid)
 
         for f in self._status.removed:
             if f in man:
                 del man[f]
 
         return man
 
     @propertycache
     def _status(self):
         """Calculate exact status from ``files`` specified at construction
         """
         man1 = self.p1().manifest()
         p2 = self._parents[1]
         # "1 < len(self._parents)" can't be used for checking
         # existence of the 2nd parent, because "memctx._parents" is
         # explicitly initialized by the list, of which length is 2.
         if p2.node() != nullid:
             man2 = p2.manifest()
             managing = lambda f: f in man1 or f in man2
         else:
             managing = lambda f: f in man1
 
         modified, added, removed = [], [], []
         for f in self._files:
             if not managing(f):
                 added.append(f)
             elif self[f]:
                 modified.append(f)
             else:
                 removed.append(f)
 
         return scmutil.status(modified, added, removed, [], [], [], [])
 
 class memfilectx(committablefilectx):
     """memfilectx represents an in-memory file to commit.
 
     See memctx and committablefilectx for more details.
     """
     def __init__(self, repo, path, data, islink=False,
                  isexec=False, copied=None, memctx=None):
         """
         path is the normalized file path relative to repository root.
         data is the file content as a string.
         islink is True if the file is a symbolic link.
         isexec is True if the file is executable.
         copied is the source file path if current file was copied in the
         revision being committed, or None."""
         super(memfilectx, self).__init__(repo, path, None, memctx)
         self._data = data
         self._flags = (islink and 'l' or '') + (isexec and 'x' or '')
         self._copied = None
         if copied:
             self._copied = (copied, nullid)
 
     def data(self):
         return self._data
 
     def remove(self, ignoremissing=False):
         """wraps unlink for a repo's working directory"""
         # need to figure out what to do here
         del self._changectx[self._path]
 
     def write(self, data, flags):
         """wraps repo.wwrite"""
         self._data = data
 
 class overlayfilectx(committablefilectx):
     """Like memfilectx but take an original filectx and optional parameters to
     override parts of it. This is useful when fctx.data() is expensive (i.e.
     flag processor is expensive) and raw data, flags, and filenode could be
     reused (ex. rebase or mode-only amend a REVIDX_EXTSTORED file).
     """
 
     def __init__(self, originalfctx, datafunc=None, path=None, flags=None,
                  copied=None, ctx=None):
         """originalfctx: filecontext to duplicate
 
         datafunc: None or a function to override data (file content). It is a
         function to be lazy. path, flags, copied, ctx: None or overridden value
 
         copied could be (path, rev), or False. copied could also be just path,
         and will be converted to (path, nullid). This simplifies some callers.
         """
 
         if path is None:
             path = originalfctx.path()
         if ctx is None:
             ctx = originalfctx.changectx()
             ctxmatch = lambda: True
         else:
             ctxmatch = lambda: ctx == originalfctx.changectx()
 
         repo = originalfctx.repo()
         flog = originalfctx.filelog()
         super(overlayfilectx, self).__init__(repo, path, flog, ctx)
 
         if copied is None:
             copied = originalfctx.renamed()
             copiedmatch = lambda: True
         else:
             if copied and not isinstance(copied, tuple):
                 # repo._filecommit will recalculate copyrev so nullid is okay
                 copied = (copied, nullid)
             copiedmatch = lambda: copied == originalfctx.renamed()
 
         # When data, copied (could affect data), ctx (could affect filelog
         # parents) are not overridden, rawdata, rawflags, and filenode may be
         # reused (repo._filecommit should double check filelog parents).
         #
         # path, flags are not hashed in filelog (but in manifestlog) so they do
         # not affect reusable here.
         #
         # If ctx or copied is overridden to a same value with originalfctx,
         # still consider it's reusable. originalfctx.renamed() may be a bit
         # expensive so it's not called unless necessary. Assuming datafunc is
         # always expensive, do not call it for this "reusable" test.
         reusable = datafunc is None and ctxmatch() and copiedmatch()
 
         if datafunc is None:
             datafunc = originalfctx.data
         if flags is None:
             flags = originalfctx.flags()
 
         self._datafunc = datafunc
         self._flags = flags
         self._copied = copied
 
         if reusable:
             # copy extra fields from originalfctx
             attrs = ['rawdata', 'rawflags', '_filenode', '_filerev']
             for attr_ in attrs:
                 if util.safehasattr(originalfctx, attr_):
                     setattr(self, attr_, getattr(originalfctx, attr_))
 
     def data(self):
         return self._datafunc()
 
 class metadataonlyctx(committablectx):
     """Like memctx but it's reusing the manifest of different commit.
     Intended to be used by lightweight operations that are creating
     metadata-only changes.
 
     Revision information is supplied at initialization time.  'repo' is the
     current localrepo, 'ctx' is original revision which manifest we're reuisng
     'parents' is a sequence of two parent revisions identifiers (pass None for
     every missing parent), 'text' is the commit.
 
     user receives the committer name and defaults to current repository
     username, date is the commit date in any format supported by
     util.parsedate() and defaults to current date, extra is a dictionary of
     metadata or is left empty.
     """
     def __new__(cls, repo, originalctx, *args, **kwargs):
         return super(metadataonlyctx, cls).__new__(cls, repo)
 
     def __init__(self, repo, originalctx, parents=None, text=None, user=None,
                  date=None, extra=None, editor=False):
         if text is None:
             text = originalctx.description()
         super(metadataonlyctx, self).__init__(repo, text, user, date, extra)
         self._rev = None
         self._node = None
         self._originalctx = originalctx
         self._manifestnode = originalctx.manifestnode()
         if parents is None:
             parents = originalctx.parents()
         else:
             parents = [repo[p] for p in parents if p is not None]
         parents = parents[:]
         while len(parents) < 2:
             parents.append(repo[nullid])
         p1, p2 = self._parents = parents
 
         # sanity check to ensure that the reused manifest parents are
         # manifests of our commit parents
         mp1, mp2 = self.manifestctx().parents
         if p1 != nullid and p1.manifestnode() != mp1:
             raise RuntimeError('can\'t reuse the manifest: '
                                'its p1 doesn\'t match the new ctx p1')
         if p2 != nullid and p2.manifestnode() != mp2:
             raise RuntimeError('can\'t reuse the manifest: '
                                'its p2 doesn\'t match the new ctx p2')
 
         self._files = originalctx.files()
         self.substate = {}
 
         if editor:
             self._text = editor(self._repo, self, [])
             self._repo.savecommitmessage(self._text)
 
     def manifestnode(self):
         return self._manifestnode
 
     @property
     def _manifestctx(self):
         return self._repo.manifestlog[self._manifestnode]
 
     def filectx(self, path, filelog=None):
         return self._originalctx.filectx(path, filelog=filelog)
 
     def commit(self):
         """commit context to the repo"""
         return self._repo.commitctx(self)
 
     @property
     def _manifest(self):
         return self._originalctx.manifest()
 
     @propertycache
     def _status(self):
         """Calculate exact status from ``files`` specified in the ``origctx``
         and parents manifests.
         """
         man1 = self.p1().manifest()
         p2 = self._parents[1]
         # "1 < len(self._parents)" can't be used for checking
         # existence of the 2nd parent, because "metadataonlyctx._parents" is
         # explicitly initialized by the list, of which length is 2.
         if p2.node() != nullid:
             man2 = p2.manifest()
             managing = lambda f: f in man1 or f in man2
         else:
             managing = lambda f: f in man1
 
         modified, added, removed = [], [], []
         for f in self._files:
             if not managing(f):
                 added.append(f)
             elif f in self:
                 modified.append(f)
             else:
                 removed.append(f)
 
         return scmutil.status(modified, added, removed, [], [], [], [])
 
 class arbitraryfilectx(object):
     """Allows you to use filectx-like functions on a file in an arbitrary
     location on disk, possibly not in the working directory.
     """
     def __init__(self, path):
         self._path = path
 
     def cmp(self, otherfilectx):
         return self.data() != otherfilectx.data()
 
     def path(self):
         return self._path
 
     def flags(self):
         return ''
 
     def data(self):
         return util.readfile(self._path)
 
     def decodeddata(self):
         with open(self._path, "rb") as f:
             return f.read()
 
     def remove(self):
         util.unlink(self._path)
 
     def write(self, data, flags):
         assert not flags
         with open(self._path, "w") as f:
             f.write(data)

mercurial/hgweb/webcommands.py

@@ -1,1399 +1,1400
 #
 # Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
 # Copyright 2005-2007 Matt 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 cgi
 import copy
 import mimetypes
 import os
 import re
 
 from ..i18n import _
 from ..node import hex, short
 
 from .common import (
     ErrorResponse,
     HTTP_FORBIDDEN,
     HTTP_NOT_FOUND,
     HTTP_OK,
     get_contact,
     paritygen,
     staticfile,
 )
 
 from .. import (
     archival,
     dagop,
     encoding,
     error,
     graphmod,
     revset,
     revsetlang,
     scmutil,
     smartset,
     templatefilters,
     templater,
     util,
 )
 
 from . import (
     webutil,
 )
 
 __all__ = []
 commands = {}
 
 class webcommand(object):
     """Decorator used to register a web command handler.
 
     The decorator takes as its positional arguments the name/path the
     command should be accessible under.
 
     Usage:
 
     @webcommand('mycommand')
     def mycommand(web, req, tmpl):
         pass
     """
 
     def __init__(self, name):
         self.name = name
 
     def __call__(self, func):
         __all__.append(self.name)
         commands[self.name] = func
         return func
 
 @webcommand('log')
 def log(web, req, tmpl):
     """
     /log[/{revision}[/{path}]]
     --------------------------
 
     Show repository or file history.
 
     For URLs of the form ``/log/{revision}``, a list of changesets starting at
     the specified changeset identifier is shown. If ``{revision}`` is not
     defined, the default is ``tip``. This form is equivalent to the
     ``changelog`` handler.
 
     For URLs of the form ``/log/{revision}/{file}``, the history for a specific
     file will be shown. This form is equivalent to the ``filelog`` handler.
     """
 
     if 'file' in req.form and req.form['file'][0]:
         return filelog(web, req, tmpl)
     else:
         return changelog(web, req, tmpl)
 
 @webcommand('rawfile')
 def rawfile(web, req, tmpl):
     guessmime = web.configbool('web', 'guessmime', False)
 
     path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])
     if not path:
         content = manifest(web, req, tmpl)
         req.respond(HTTP_OK, web.ctype)
         return content
 
     try:
         fctx = webutil.filectx(web.repo, req)
     except error.LookupError as inst:
         try:
             content = manifest(web, req, tmpl)
             req.respond(HTTP_OK, web.ctype)
             return content
         except ErrorResponse:
             raise inst
 
     path = fctx.path()
     text = fctx.data()
     mt = 'application/binary'
     if guessmime:
         mt = mimetypes.guess_type(path)[0]
         if mt is None:
             if util.binary(text):
                 mt = 'application/binary'
             else:
                 mt = 'text/plain'
     if mt.startswith('text/'):
         mt += '; charset="%s"' % encoding.encoding
 
     req.respond(HTTP_OK, mt, path, body=text)
     return []
 
 def _filerevision(web, req, tmpl, fctx):
     f = fctx.path()
     text = fctx.data()
     parity = paritygen(web.stripecount)
     ishead = fctx.filerev() in fctx.filelog().headrevs()
 
     if util.binary(text):
         mt = mimetypes.guess_type(f)[0] or 'application/octet-stream'
         text = '(binary:%s)' % mt
 
     def lines():
         for lineno, t in enumerate(text.splitlines(True)):
             yield {"line": t,
                    "lineid": "l%d" % (lineno + 1),
                    "linenumber": "% 6d" % (lineno + 1),
                    "parity": next(parity)}
 
     return tmpl("filerevision",
                 file=f,
                 path=webutil.up(f),
                 text=lines(),
                 symrev=webutil.symrevorshortnode(req, fctx),
                 rename=webutil.renamelink(fctx),
                 permissions=fctx.manifest().flags(f),
                 ishead=int(ishead),
                 **webutil.commonentry(web.repo, fctx))
 
 @webcommand('file')
 def file(web, req, tmpl):
     """
     /file/{revision}[/{path}]
     -------------------------
 
     Show information about a directory or file in the repository.
 
     Info about the ``path`` given as a URL parameter will be rendered.
 
     If ``path`` is a directory, information about the entries in that
     directory will be rendered. This form is equivalent to the ``manifest``
     handler.
 
     If ``path`` is a file, information about that file will be shown via
     the ``filerevision`` template.
 
     If ``path`` is not defined, information about the root directory will
     be rendered.
     """
     path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])
     if not path:
         return manifest(web, req, tmpl)
     try:
         return _filerevision(web, req, tmpl, webutil.filectx(web.repo, req))
     except error.LookupError as inst:
         try:
             return manifest(web, req, tmpl)
         except ErrorResponse:
             raise inst
 
 def _search(web, req, tmpl):
     MODE_REVISION = 'rev'
     MODE_KEYWORD = 'keyword'
     MODE_REVSET = 'revset'
 
     def revsearch(ctx):
         yield ctx
 
     def keywordsearch(query):
         lower = encoding.lower
         qw = lower(query).split()
 
         def revgen():
             cl = web.repo.changelog
             for i in xrange(len(web.repo) - 1, 0, -100):
                 l = []
                 for j in cl.revs(max(0, i - 99), i):
                     ctx = web.repo[j]
                     l.append(ctx)
                 l.reverse()
                 for e in l:
                     yield e
 
         for ctx in revgen():
             miss = 0
             for q in qw:
                 if not (q in lower(ctx.user()) or
                         q in lower(ctx.description()) or
                         q in lower(" ".join(ctx.files()))):
                     miss = 1
                     break
             if miss:
                 continue
 
             yield ctx
 
     def revsetsearch(revs):
         for r in revs:
             yield web.repo[r]
 
     searchfuncs = {
         MODE_REVISION: (revsearch, 'exact revision search'),
         MODE_KEYWORD: (keywordsearch, 'literal keyword search'),
         MODE_REVSET: (revsetsearch, 'revset expression search'),
     }
 
     def getsearchmode(query):
         try:
             ctx = web.repo[query]
         except (error.RepoError, error.LookupError):
             # query is not an exact revision pointer, need to
             # decide if it's a revset expression or keywords
             pass
         else:
             return MODE_REVISION, ctx
 
         revdef = 'reverse(%s)' % query
         try:
             tree = revsetlang.parse(revdef)
         except error.ParseError:
             # can't parse to a revset tree
             return MODE_KEYWORD, query
 
         if revsetlang.depth(tree) <= 2:
             # no revset syntax used
             return MODE_KEYWORD, query
 
         if any((token, (value or '')[:3]) == ('string', 're:')
                for token, value, pos in revsetlang.tokenize(revdef)):
             return MODE_KEYWORD, query
 
         funcsused = revsetlang.funcsused(tree)
         if not funcsused.issubset(revset.safesymbols):
             return MODE_KEYWORD, query
 
         mfunc = revset.match(web.repo.ui, revdef, repo=web.repo)
         try:
             revs = mfunc(web.repo)
             return MODE_REVSET, revs
             # ParseError: wrongly placed tokens, wrongs arguments, etc
             # RepoLookupError: no such revision, e.g. in 'revision:'
             # Abort: bookmark/tag not exists
             # LookupError: ambiguous identifier, e.g. in '(bc)' on a large repo
         except (error.ParseError, error.RepoLookupError, error.Abort,
                 LookupError):
             return MODE_KEYWORD, query
 
     def changelist(**map):
         count = 0
 
         for ctx in searchfunc[0](funcarg):
             count += 1
             n = ctx.node()
             showtags = webutil.showtag(web.repo, tmpl, 'changelogtag', n)
             files = webutil.listfilediffs(tmpl, ctx.files(), n, web.maxfiles)
 
             yield tmpl('searchentry',
                        parity=next(parity),
                        changelogtag=showtags,
                        files=files,
                        **webutil.commonentry(web.repo, ctx))
 
             if count >= revcount:
                 break
 
     query = req.form['rev'][0]
     revcount = web.maxchanges
     if 'revcount' in req.form:
         try:
             revcount = int(req.form.get('revcount', [revcount])[0])
             revcount = max(revcount, 1)
             tmpl.defaults['sessionvars']['revcount'] = revcount
         except ValueError:
             pass
 
     lessvars = copy.copy(tmpl.defaults['sessionvars'])
     lessvars['revcount'] = max(revcount / 2, 1)
     lessvars['rev'] = query
     morevars = copy.copy(tmpl.defaults['sessionvars'])
     morevars['revcount'] = revcount * 2
     morevars['rev'] = query
 
     mode, funcarg = getsearchmode(query)
 
     if 'forcekw' in req.form:
         showforcekw = ''
         showunforcekw = searchfuncs[mode][1]
         mode = MODE_KEYWORD
         funcarg = query
     else:
         if mode != MODE_KEYWORD:
             showforcekw = searchfuncs[MODE_KEYWORD][1]
         else:
             showforcekw = ''
         showunforcekw = ''
 
     searchfunc = searchfuncs[mode]
 
     tip = web.repo['tip']
     parity = paritygen(web.stripecount)
 
     return tmpl('search', query=query, node=tip.hex(), symrev='tip',
                 entries=changelist, archives=web.archivelist("tip"),
                 morevars=morevars, lessvars=lessvars,
                 modedesc=searchfunc[1],
                 showforcekw=showforcekw, showunforcekw=showunforcekw)
 
 @webcommand('changelog')
 def changelog(web, req, tmpl, shortlog=False):
     """
     /changelog[/{revision}]
     -----------------------
 
     Show information about multiple changesets.
 
     If the optional ``revision`` URL argument is absent, information about
     all changesets starting at ``tip`` will be rendered. If the ``revision``
     argument is present, changesets will be shown starting from the specified
     revision.
 
     If ``revision`` is absent, the ``rev`` query string argument may be
     defined. This will perform a search for changesets.
 
     The argument for ``rev`` can be a single revision, a revision set,
     or a literal keyword to search for in changeset data (equivalent to
     :hg:`log -k`).
 
     The ``revcount`` query string argument defines the maximum numbers of
     changesets to render.
 
     For non-searches, the ``changelog`` template will be rendered.
     """
 
     query = ''
     if 'node' in req.form:
         ctx = webutil.changectx(web.repo, req)
         symrev = webutil.symrevorshortnode(req, ctx)
     elif 'rev' in req.form:
         return _search(web, req, tmpl)
     else:
         ctx = web.repo['tip']
         symrev = 'tip'
 
     def changelist():
         revs = []
         if pos != -1:
             revs = web.repo.changelog.revs(pos, 0)
         curcount = 0
         for rev in revs:
             curcount += 1
             if curcount > revcount + 1:
                 break
 
             entry = webutil.changelistentry(web, web.repo[rev], tmpl)
             entry['parity'] = next(parity)
             yield entry
 
     if shortlog:
         revcount = web.maxshortchanges
     else:
         revcount = web.maxchanges
 
     if 'revcount' in req.form:
         try:
             revcount = int(req.form.get('revcount', [revcount])[0])
             revcount = max(revcount, 1)
             tmpl.defaults['sessionvars']['revcount'] = revcount
         except ValueError:
             pass
 
     lessvars = copy.copy(tmpl.defaults['sessionvars'])
     lessvars['revcount'] = max(revcount / 2, 1)
     morevars = copy.copy(tmpl.defaults['sessionvars'])
     morevars['revcount'] = revcount * 2
 
     count = len(web.repo)
     pos = ctx.rev()
     parity = paritygen(web.stripecount)
 
     changenav = webutil.revnav(web.repo).gen(pos, revcount, count)
 
     entries = list(changelist())
     latestentry = entries[:1]
     if len(entries) > revcount:
         nextentry = entries[-1:]
         entries = entries[:-1]
     else:
         nextentry = []
 
     return tmpl(shortlog and 'shortlog' or 'changelog', changenav=changenav,
                 node=ctx.hex(), rev=pos, symrev=symrev, changesets=count,
                 entries=entries,
                 latestentry=latestentry, nextentry=nextentry,
                 archives=web.archivelist("tip"), revcount=revcount,
                 morevars=morevars, lessvars=lessvars, query=query)
 
 @webcommand('shortlog')
 def shortlog(web, req, tmpl):
     """
     /shortlog
     ---------
 
     Show basic information about a set of changesets.
 
     This accepts the same parameters as the ``changelog`` handler. The only
     difference is the ``shortlog`` template will be rendered instead of the
     ``changelog`` template.
     """
     return changelog(web, req, tmpl, shortlog=True)
 
 @webcommand('changeset')
 def changeset(web, req, tmpl):
     """
     /changeset[/{revision}]
     -----------------------
 
     Show information about a single changeset.
 
     A URL path argument is the changeset identifier to show. See ``hg help
     revisions`` for possible values. If not defined, the ``tip`` changeset
     will be shown.
 
     The ``changeset`` template is rendered. Contents of the ``changesettag``,
     ``changesetbookmark``, ``filenodelink``, ``filenolink``, and the many
     templates related to diffs may all be used to produce the output.
     """
     ctx = webutil.changectx(web.repo, req)
 
     return tmpl('changeset', **webutil.changesetentry(web, req, tmpl, ctx))
 
 rev = webcommand('rev')(changeset)
 
 def decodepath(path):
     """Hook for mapping a path in the repository to a path in the
     working copy.
 
     Extensions (e.g., largefiles) can override this to remap files in
     the virtual file system presented by the manifest command below."""
     return path
 
 @webcommand('manifest')
 def manifest(web, req, tmpl):
     """
     /manifest[/{revision}[/{path}]]
     -------------------------------
 
     Show information about a directory.
 
     If the URL path arguments are omitted, information about the root
     directory for the ``tip`` changeset will be shown.
 
     Because this handler can only show information for directories, it
     is recommended to use the ``file`` handler instead, as it can handle both
     directories and files.
 
     The ``manifest`` template will be rendered for this handler.
     """
     if 'node' in req.form:
         ctx = webutil.changectx(web.repo, req)
         symrev = webutil.symrevorshortnode(req, ctx)
     else:
         ctx = web.repo['tip']
         symrev = 'tip'
     path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])
     mf = ctx.manifest()
     node = ctx.node()
 
     files = {}
     dirs = {}
     parity = paritygen(web.stripecount)
 
     if path and path[-1] != "/":
         path += "/"
     l = len(path)
     abspath = "/" + path
 
     for full, n in mf.iteritems():
         # the virtual path (working copy path) used for the full
         # (repository) path
         f = decodepath(full)
 
         if f[:l] != path:
             continue
         remain = f[l:]
         elements = remain.split('/')
         if len(elements) == 1:
             files[remain] = full
         else:
             h = dirs # need to retain ref to dirs (root)
             for elem in elements[0:-1]:
                 if elem not in h:
                     h[elem] = {}
                 h = h[elem]
                 if len(h) > 1:
                     break
             h[None] = None # denotes files present
 
     if mf and not files and not dirs:
         raise ErrorResponse(HTTP_NOT_FOUND, 'path not found: ' + path)
 
     def filelist(**map):
         for f in sorted(files):
             full = files[f]
 
             fctx = ctx.filectx(full)
             yield {"file": full,
                    "parity": next(parity),
                    "basename": f,
                    "date": fctx.date(),
                    "size": fctx.size(),
                    "permissions": mf.flags(full)}
 
     def dirlist(**map):
         for d in sorted(dirs):
 
             emptydirs = []
             h = dirs[d]
             while isinstance(h, dict) and len(h) == 1:
                 k, v = h.items()[0]
                 if v:
                     emptydirs.append(k)
                 h = v
 
             path = "%s%s" % (abspath, d)
             yield {"parity": next(parity),
                    "path": path,
                    "emptydirs": "/".join(emptydirs),
                    "basename": d}
 
     return tmpl("manifest",
                 symrev=symrev,
                 path=abspath,
                 up=webutil.up(abspath),
                 upparity=next(parity),
                 fentries=filelist,
                 dentries=dirlist,
                 archives=web.archivelist(hex(node)),
                 **webutil.commonentry(web.repo, ctx))
 
 @webcommand('tags')
 def tags(web, req, tmpl):
     """
     /tags
     -----
 
     Show information about tags.
 
     No arguments are accepted.
 
     The ``tags`` template is rendered.
     """
     i = list(reversed(web.repo.tagslist()))
     parity = paritygen(web.stripecount)
 
     def entries(notip, latestonly, **map):
         t = i
         if notip:
             t = [(k, n) for k, n in i if k != "tip"]
         if latestonly:
             t = t[:1]
         for k, n in t:
             yield {"parity": next(parity),
                    "tag": k,
                    "date": web.repo[n].date(),
                    "node": hex(n)}
 
     return tmpl("tags",
                 node=hex(web.repo.changelog.tip()),
                 entries=lambda **x: entries(False, False, **x),
                 entriesnotip=lambda **x: entries(True, False, **x),
                 latestentry=lambda **x: entries(True, True, **x))
 
 @webcommand('bookmarks')
 def bookmarks(web, req, tmpl):
     """
     /bookmarks
     ----------
 
     Show information about bookmarks.
 
     No arguments are accepted.
 
     The ``bookmarks`` template is rendered.
     """
     i = [b for b in web.repo._bookmarks.items() if b[1] in web.repo]
     sortkey = lambda b: (web.repo[b[1]].rev(), b[0])
     i = sorted(i, key=sortkey, reverse=True)
     parity = paritygen(web.stripecount)
 
     def entries(latestonly, **map):
         t = i
         if latestonly:
             t = i[:1]
         for k, n in t:
             yield {"parity": next(parity),
                    "bookmark": k,
                    "date": web.repo[n].date(),
                    "node": hex(n)}
 
     if i:
         latestrev = i[0][1]
     else:
         latestrev = -1
 
     return tmpl("bookmarks",
                 node=hex(web.repo.changelog.tip()),
                 lastchange=[{"date": web.repo[latestrev].date()}],
                 entries=lambda **x: entries(latestonly=False, **x),
                 latestentry=lambda **x: entries(latestonly=True, **x))
 
 @webcommand('branches')
 def branches(web, req, tmpl):
     """
     /branches
     ---------
 
     Show information about branches.
 
     All known branches are contained in the output, even closed branches.
 
     No arguments are accepted.
 
     The ``branches`` template is rendered.
     """
     entries = webutil.branchentries(web.repo, web.stripecount)
     latestentry = webutil.branchentries(web.repo, web.stripecount, 1)
     return tmpl('branches', node=hex(web.repo.changelog.tip()),
                 entries=entries, latestentry=latestentry)
 
 @webcommand('summary')
 def summary(web, req, tmpl):
     """
     /summary
     --------
 
     Show a summary of repository state.
 
     Information about the latest changesets, bookmarks, tags, and branches
     is captured by this handler.
 
     The ``summary`` template is rendered.
     """
     i = reversed(web.repo.tagslist())
 
     def tagentries(**map):
         parity = paritygen(web.stripecount)
         count = 0
         for k, n in i:
             if k == "tip": # skip tip
                 continue
 
             count += 1
             if count > 10: # limit to 10 tags
                 break
 
             yield tmpl("tagentry",
                        parity=next(parity),
                        tag=k,
                        node=hex(n),
                        date=web.repo[n].date())
 
     def bookmarks(**map):
         parity = paritygen(web.stripecount)
         marks = [b for b in web.repo._bookmarks.items() if b[1] in web.repo]
         sortkey = lambda b: (web.repo[b[1]].rev(), b[0])
         marks = sorted(marks, key=sortkey, reverse=True)
         for k, n in marks[:10]:  # limit to 10 bookmarks
             yield {'parity': next(parity),
                    'bookmark': k,
                    'date': web.repo[n].date(),
                    'node': hex(n)}
 
     def changelist(**map):
         parity = paritygen(web.stripecount, offset=start - end)
         l = [] # build a list in forward order for efficiency
         revs = []
         if start < end:
             revs = web.repo.changelog.revs(start, end - 1)
         for i in revs:
             ctx = web.repo[i]
 
             l.append(tmpl(
                 'shortlogentry',
                 parity=next(parity),
                 **webutil.commonentry(web.repo, ctx)))
 
         for entry in reversed(l):
             yield entry
 
     tip = web.repo['tip']
     count = len(web.repo)
     start = max(0, count - web.maxchanges)
     end = min(count, start + web.maxchanges)
 
     desc = web.config("web", "description")
     if not desc:
         desc = 'unknown'
     return tmpl("summary",
                 desc=desc,
                 owner=get_contact(web.config) or "unknown",
                 lastchange=tip.date(),
                 tags=tagentries,
                 bookmarks=bookmarks,
                 branches=webutil.branchentries(web.repo, web.stripecount, 10),
                 shortlog=changelist,
                 node=tip.hex(),
                 symrev='tip',
                 archives=web.archivelist("tip"),
                 labels=web.configlist('web', 'labels'))
 
 @webcommand('filediff')
 def filediff(web, req, tmpl):
     """
     /diff/{revision}/{path}
     -----------------------
 
     Show how a file changed in a particular commit.
 
     The ``filediff`` template is rendered.
 
     This handler is registered under both the ``/diff`` and ``/filediff``
     paths. ``/diff`` is used in modern code.
     """
     fctx, ctx = None, None
     try:
         fctx = webutil.filectx(web.repo, req)
     except LookupError:
         ctx = webutil.changectx(web.repo, req)
         path = webutil.cleanpath(web.repo, req.form['file'][0])
         if path not in ctx.files():
             raise
 
     if fctx is not None:
         path = fctx.path()
         ctx = fctx.changectx()
     basectx = ctx.p1()
 
     style = web.config('web', 'style')
     if 'style' in req.form:
         style = req.form['style'][0]
 
     diffs = webutil.diffs(web, tmpl, ctx, basectx, [path], style)
     if fctx is not None:
         rename = webutil.renamelink(fctx)
         ctx = fctx
     else:
         rename = []
         ctx = ctx
     return tmpl("filediff",
                 file=path,
                 symrev=webutil.symrevorshortnode(req, ctx),
                 rename=rename,
                 diff=diffs,
                 **webutil.commonentry(web.repo, ctx))
 
 diff = webcommand('diff')(filediff)
 
 @webcommand('comparison')
 def comparison(web, req, tmpl):
     """
     /comparison/{revision}/{path}
     -----------------------------
 
     Show a comparison between the old and new versions of a file from changes
     made on a particular revision.
 
     This is similar to the ``diff`` handler. However, this form features
     a split or side-by-side diff rather than a unified diff.
 
     The ``context`` query string argument can be used to control the lines of
     context in the diff.
 
     The ``filecomparison`` template is rendered.
     """
     ctx = webutil.changectx(web.repo, req)
     if 'file' not in req.form:
         raise ErrorResponse(HTTP_NOT_FOUND, 'file not given')
     path = webutil.cleanpath(web.repo, req.form['file'][0])
 
     parsecontext = lambda v: v == 'full' and -1 or int(v)
     if 'context' in req.form:
         context = parsecontext(req.form['context'][0])
     else:
         context = parsecontext(web.config('web', 'comparisoncontext', '5'))
 
     def filelines(f):
         if f.isbinary():
             mt = mimetypes.guess_type(f.path())[0]
             if not mt:
                 mt = 'application/octet-stream'
             return [_('(binary file %s, hash: %s)') % (mt, hex(f.filenode()))]
         return f.data().splitlines()
 
     fctx = None
     parent = ctx.p1()
     leftrev = parent.rev()
     leftnode = parent.node()
     rightrev = ctx.rev()
     rightnode = ctx.node()
     if path in ctx:
         fctx = ctx[path]
         rightlines = filelines(fctx)
         if path not in parent:
             leftlines = ()
         else:
             pfctx = parent[path]
             leftlines = filelines(pfctx)
     else:
         rightlines = ()
         pfctx = ctx.parents()[0][path]
         leftlines = filelines(pfctx)
 
     comparison = webutil.compare(tmpl, context, leftlines, rightlines)
     if fctx is not None:
         rename = webutil.renamelink(fctx)
         ctx = fctx
     else:
         rename = []
         ctx = ctx
     return tmpl('filecomparison',
                 file=path,
                 symrev=webutil.symrevorshortnode(req, ctx),
                 rename=rename,
                 leftrev=leftrev,
                 leftnode=hex(leftnode),
                 rightrev=rightrev,
                 rightnode=hex(rightnode),
                 comparison=comparison,
                 **webutil.commonentry(web.repo, ctx))
 
 @webcommand('annotate')
 def annotate(web, req, tmpl):
     """
     /annotate/{revision}/{path}
     ---------------------------
 
     Show changeset information for each line in a file.
 
     The ``ignorews``, ``ignorewsamount``, ``ignorewseol``, and
     ``ignoreblanklines`` query string arguments have the same meaning as
     their ``[annotate]`` config equivalents. It uses the hgrc boolean
     parsing logic to interpret the value. e.g. ``0`` and ``false`` are
     false and ``1`` and ``true`` are true. If not defined, the server
     default settings are used.
 
     The ``fileannotate`` template is rendered.
     """
     fctx = webutil.filectx(web.repo, req)
     f = fctx.path()
     parity = paritygen(web.stripecount)
     ishead = fctx.filerev() in fctx.filelog().headrevs()
 
     # parents() is called once per line and several lines likely belong to
     # same revision. So it is worth caching.
     # TODO there are still redundant operations within basefilectx.parents()
     # and from the fctx.annotate() call itself that could be cached.
     parentscache = {}
     def parents(f):
         rev = f.rev()
         if rev not in parentscache:
             parentscache[rev] = []
             for p in f.parents():
                 entry = {
                     'node': p.hex(),
                     'rev': p.rev(),
                 }
                 parentscache[rev].append(entry)
 
         for p in parentscache[rev]:
             yield p
 
     def annotate(**map):
         if fctx.isbinary():
             mt = (mimetypes.guess_type(fctx.path())[0]
                   or 'application/octet-stream')
             lines = [((fctx.filectx(fctx.filerev()), 1), '(binary:%s)' % mt)]
         else:
             lines = webutil.annotate(req, fctx, web.repo.ui)
 
         previousrev = None
         blockparitygen = paritygen(1)
-        for lineno, ((f, targetline), l) in enumerate(lines):
+        for lineno, (aline, l) in enumerate(lines):
+            f = aline.fctx
             rev = f.rev()
             if rev != previousrev:
                 blockhead = True
                 blockparity = next(blockparitygen)
             else:
                 blockhead = None
             previousrev = rev
             yield {"parity": next(parity),
                    "node": f.hex(),
                    "rev": rev,
                    "author": f.user(),
                    "parents": parents(f),
                    "desc": f.description(),
                    "extra": f.extra(),
                    "file": f.path(),
                    "blockhead": blockhead,
                    "blockparity": blockparity,
-                   "targetline": targetline,
+                   "targetline": aline.lineno,
                    "line": l,
                    "lineno": lineno + 1,
                    "lineid": "l%d" % (lineno + 1),
                    "linenumber": "% 6d" % (lineno + 1),
                    "revdate": f.date()}
 
     diffopts = webutil.difffeatureopts(req, web.repo.ui, 'annotate')
     diffopts = {k: getattr(diffopts, k) for k in diffopts.defaults}
 
     return tmpl("fileannotate",
                 file=f,
                 annotate=annotate,
                 path=webutil.up(f),
                 symrev=webutil.symrevorshortnode(req, fctx),
                 rename=webutil.renamelink(fctx),
                 permissions=fctx.manifest().flags(f),
                 ishead=int(ishead),
                 diffopts=diffopts,
                 **webutil.commonentry(web.repo, fctx))
 
 @webcommand('filelog')
 def filelog(web, req, tmpl):
     """
     /filelog/{revision}/{path}
     --------------------------
 
     Show information about the history of a file in the repository.
 
     The ``revcount`` query string argument can be defined to control the
     maximum number of entries to show.
 
     The ``filelog`` template will be rendered.
     """
 
     try:
         fctx = webutil.filectx(web.repo, req)
         f = fctx.path()
         fl = fctx.filelog()
     except error.LookupError:
         f = webutil.cleanpath(web.repo, req.form['file'][0])
         fl = web.repo.file(f)
         numrevs = len(fl)
         if not numrevs: # file doesn't exist at all
             raise
         rev = webutil.changectx(web.repo, req).rev()
         first = fl.linkrev(0)
         if rev < first: # current rev is from before file existed
             raise
         frev = numrevs - 1
         while fl.linkrev(frev) > rev:
             frev -= 1
         fctx = web.repo.filectx(f, fl.linkrev(frev))
 
     revcount = web.maxshortchanges
     if 'revcount' in req.form:
         try:
             revcount = int(req.form.get('revcount', [revcount])[0])
             revcount = max(revcount, 1)
             tmpl.defaults['sessionvars']['revcount'] = revcount
         except ValueError:
             pass
 
     lrange = webutil.linerange(req)
 
     lessvars = copy.copy(tmpl.defaults['sessionvars'])
     lessvars['revcount'] = max(revcount / 2, 1)
     morevars = copy.copy(tmpl.defaults['sessionvars'])
     morevars['revcount'] = revcount * 2
 
     patch = 'patch' in req.form
     if patch:
         lessvars['patch'] = morevars['patch'] = req.form['patch'][0]
     descend = 'descend' in req.form
     if descend:
         lessvars['descend'] = morevars['descend'] = req.form['descend'][0]
 
     count = fctx.filerev() + 1
     start = max(0, count - revcount) # first rev on this page
     end = min(count, start + revcount) # last rev on this page
     parity = paritygen(web.stripecount, offset=start - end)
 
     repo = web.repo
     revs = fctx.filelog().revs(start, end - 1)
     entries = []
 
     diffstyle = web.config('web', 'style')
     if 'style' in req.form:
         diffstyle = req.form['style'][0]
 
     def diff(fctx, linerange=None):
         ctx = fctx.changectx()
         basectx = ctx.p1()
         path = fctx.path()
         return webutil.diffs(web, tmpl, ctx, basectx, [path], diffstyle,
                              linerange=linerange,
                              lineidprefix='%s-' % ctx.hex()[:12])
 
     linerange = None
     if lrange is not None:
         linerange = webutil.formatlinerange(*lrange)
         # deactivate numeric nav links when linerange is specified as this
         # would required a dedicated "revnav" class
         nav = None
         if descend:
             it = dagop.blockdescendants(fctx, *lrange)
         else:
             it = dagop.blockancestors(fctx, *lrange)
         for i, (c, lr) in enumerate(it, 1):
             diffs = None
             if patch:
                 diffs = diff(c, linerange=lr)
             # follow renames accross filtered (not in range) revisions
             path = c.path()
             entries.append(dict(
                 parity=next(parity),
                 filerev=c.rev(),
                 file=path,
                 diff=diffs,
                 linerange=webutil.formatlinerange(*lr),
                 **webutil.commonentry(repo, c)))
             if i == revcount:
                 break
         lessvars['linerange'] = webutil.formatlinerange(*lrange)
         morevars['linerange'] = lessvars['linerange']
     else:
         for i in revs:
             iterfctx = fctx.filectx(i)
             diffs = None
             if patch:
                 diffs = diff(iterfctx)
             entries.append(dict(
                 parity=next(parity),
                 filerev=i,
                 file=f,
                 diff=diffs,
                 rename=webutil.renamelink(iterfctx),
                 **webutil.commonentry(repo, iterfctx)))
         entries.reverse()
         revnav = webutil.filerevnav(web.repo, fctx.path())
         nav = revnav.gen(end - 1, revcount, count)
 
     latestentry = entries[:1]
 
     return tmpl("filelog",
                 file=f,
                 nav=nav,
                 symrev=webutil.symrevorshortnode(req, fctx),
                 entries=entries,
                 descend=descend,
                 patch=patch,
                 latestentry=latestentry,
                 linerange=linerange,
                 revcount=revcount,
                 morevars=morevars,
                 lessvars=lessvars,
                 **webutil.commonentry(web.repo, fctx))
 
 @webcommand('archive')
 def archive(web, req, tmpl):
     """
     /archive/{revision}.{format}[/{path}]
     -------------------------------------
 
     Obtain an archive of repository content.
 
     The content and type of the archive is defined by a URL path parameter.
     ``format`` is the file extension of the archive type to be generated. e.g.
     ``zip`` or ``tar.bz2``. Not all archive types may be allowed by your
     server configuration.
 
     The optional ``path`` URL parameter controls content to include in the
     archive. If omitted, every file in the specified revision is present in the
     archive. If included, only the specified file or contents of the specified
     directory will be included in the archive.
 
     No template is used for this handler. Raw, binary content is generated.
     """
 
     type_ = req.form.get('type', [None])[0]
     allowed = web.configlist("web", "allow_archive")
     key = req.form['node'][0]
 
     if type_ not in web.archivespecs:
         msg = 'Unsupported archive type: %s' % type_
         raise ErrorResponse(HTTP_NOT_FOUND, msg)
 
     if not ((type_ in allowed or
         web.configbool("web", "allow" + type_, False))):
         msg = 'Archive type not allowed: %s' % type_
         raise ErrorResponse(HTTP_FORBIDDEN, msg)
 
     reponame = re.sub(r"\W+", "-", os.path.basename(web.reponame))
     cnode = web.repo.lookup(key)
     arch_version = key
     if cnode == key or key == 'tip':
         arch_version = short(cnode)
     name = "%s-%s" % (reponame, arch_version)
 
     ctx = webutil.changectx(web.repo, req)
     pats = []
     match = scmutil.match(ctx, [])
     file = req.form.get('file', None)
     if file:
         pats = ['path:' + file[0]]
         match = scmutil.match(ctx, pats, default='path')
         if pats:
             files = [f for f in ctx.manifest().keys() if match(f)]
             if not files:
                 raise ErrorResponse(HTTP_NOT_FOUND,
                     'file(s) not found: %s' % file[0])
 
     mimetype, artype, extension, encoding = web.archivespecs[type_]
     headers = [
         ('Content-Disposition', 'attachment; filename=%s%s' % (name, extension))
         ]
     if encoding:
         headers.append(('Content-Encoding', encoding))
     req.headers.extend(headers)
     req.respond(HTTP_OK, mimetype)
 
     archival.archive(web.repo, req, cnode, artype, prefix=name,
                      matchfn=match,
                      subrepos=web.configbool("web", "archivesubrepos"))
     return []
 
 
 @webcommand('static')
 def static(web, req, tmpl):
     fname = req.form['file'][0]
     # a repo owner may set web.static in .hg/hgrc to get any file
     # readable by the user running the CGI script
     static = web.config("web", "static", None, untrusted=False)
     if not static:
         tp = web.templatepath or templater.templatepaths()
         if isinstance(tp, str):
             tp = [tp]
         static = [os.path.join(p, 'static') for p in tp]
     staticfile(static, fname, req)
     return []
 
 @webcommand('graph')
 def graph(web, req, tmpl):
     """
     /graph[/{revision}]
     -------------------
 
     Show information about the graphical topology of the repository.
 
     Information rendered by this handler can be used to create visual
     representations of repository topology.
 
     The ``revision`` URL parameter controls the starting changeset.
 
     The ``revcount`` query string argument can define the number of changesets
     to show information for.
 
     This handler will render the ``graph`` template.
     """
 
     if 'node' in req.form:
         ctx = webutil.changectx(web.repo, req)
         symrev = webutil.symrevorshortnode(req, ctx)
     else:
         ctx = web.repo['tip']
         symrev = 'tip'
     rev = ctx.rev()
 
     bg_height = 39
     revcount = web.maxshortchanges
     if 'revcount' in req.form:
         try:
             revcount = int(req.form.get('revcount', [revcount])[0])
             revcount = max(revcount, 1)
             tmpl.defaults['sessionvars']['revcount'] = revcount
         except ValueError:
             pass
 
     lessvars = copy.copy(tmpl.defaults['sessionvars'])
     lessvars['revcount'] = max(revcount / 2, 1)
     morevars = copy.copy(tmpl.defaults['sessionvars'])
     morevars['revcount'] = revcount * 2
 
     count = len(web.repo)
     pos = rev
 
     uprev = min(max(0, count - 1), rev + revcount)
     downrev = max(0, rev - revcount)
     changenav = webutil.revnav(web.repo).gen(pos, revcount, count)
 
     tree = []
     if pos != -1:
         allrevs = web.repo.changelog.revs(pos, 0)
         revs = []
         for i in allrevs:
             revs.append(i)
             if len(revs) >= revcount:
                 break
 
         # We have to feed a baseset to dagwalker as it is expecting smartset
         # object. This does not have a big impact on hgweb performance itself
         # since hgweb graphing code is not itself lazy yet.
         dag = graphmod.dagwalker(web.repo, smartset.baseset(revs))
         # As we said one line above... not lazy.
         tree = list(graphmod.colored(dag, web.repo))
 
     def getcolumns(tree):
         cols = 0
         for (id, type, ctx, vtx, edges) in tree:
             if type != graphmod.CHANGESET:
                 continue
             cols = max(cols, max([edge[0] for edge in edges] or [0]),
                              max([edge[1] for edge in edges] or [0]))
         return cols
 
     def graphdata(usetuples, encodestr):
         data = []
 
         row = 0
         for (id, type, ctx, vtx, edges) in tree:
             if type != graphmod.CHANGESET:
                 continue
             node = str(ctx)
             age = encodestr(templatefilters.age(ctx.date()))
             desc = templatefilters.firstline(encodestr(ctx.description()))
             desc = cgi.escape(templatefilters.nonempty(desc))
             user = cgi.escape(templatefilters.person(encodestr(ctx.user())))
             branch = cgi.escape(encodestr(ctx.branch()))
             try:
                 branchnode = web.repo.branchtip(branch)
             except error.RepoLookupError:
                 branchnode = None
             branch = branch, branchnode == ctx.node()
 
             if usetuples:
                 data.append((node, vtx, edges, desc, user, age, branch,
                              [cgi.escape(encodestr(x)) for x in ctx.tags()],
                              [cgi.escape(encodestr(x))
                               for x in ctx.bookmarks()]))
             else:
                 edgedata = [{'col': edge[0], 'nextcol': edge[1],
                              'color': (edge[2] - 1) % 6 + 1,
                              'width': edge[3], 'bcolor': edge[4]}
                             for edge in edges]
 
                 data.append(
                     {'node': node,
                      'col': vtx[0],
                      'color': (vtx[1] - 1) % 6 + 1,
                      'edges': edgedata,
                      'row': row,
                      'nextrow': row + 1,
                      'desc': desc,
                      'user': user,
                      'age': age,
                      'bookmarks': webutil.nodebookmarksdict(
                          web.repo, ctx.node()),
                      'branches': webutil.nodebranchdict(web.repo, ctx),
                      'inbranch': webutil.nodeinbranch(web.repo, ctx),
                      'tags': webutil.nodetagsdict(web.repo, ctx.node())})
 
             row += 1
 
         return data
 
     cols = getcolumns(tree)
     rows = len(tree)
     canvasheight = (rows + 1) * bg_height - 27
 
     return tmpl('graph', rev=rev, symrev=symrev, revcount=revcount,
                 uprev=uprev,
                 lessvars=lessvars, morevars=morevars, downrev=downrev,
                 cols=cols, rows=rows,
                 canvaswidth=(cols + 1) * bg_height,
                 truecanvasheight=rows * bg_height,
                 canvasheight=canvasheight, bg_height=bg_height,
                 # {jsdata} will be passed to |json, so it must be in utf-8
                 jsdata=lambda **x: graphdata(True, encoding.fromlocal),
                 nodes=lambda **x: graphdata(False, str),
                 node=ctx.hex(), changenav=changenav)
 
 def _getdoc(e):
     doc = e[0].__doc__
     if doc:
         doc = _(doc).partition('\n')[0]
     else:
         doc = _('(no help text available)')
     return doc
 
 @webcommand('help')
 def help(web, req, tmpl):
     """
     /help[/{topic}]
     ---------------
 
     Render help documentation.
 
     This web command is roughly equivalent to :hg:`help`. If a ``topic``
     is defined, that help topic will be rendered. If not, an index of
     available help topics will be rendered.
 
     The ``help`` template will be rendered when requesting help for a topic.
     ``helptopics`` will be rendered for the index of help topics.
     """
     from .. import commands, help as helpmod  # avoid cycle
 
     topicname = req.form.get('node', [None])[0]
     if not topicname:
         def topics(**map):
             for entries, summary, _doc in helpmod.helptable:
                 yield {'topic': entries[0], 'summary': summary}
 
         early, other = [], []
         primary = lambda s: s.partition('|')[0]
         for c, e in commands.table.iteritems():
             doc = _getdoc(e)
             if 'DEPRECATED' in doc or c.startswith('debug'):
                 continue
             cmd = primary(c)
             if cmd.startswith('^'):
                 early.append((cmd[1:], doc))
             else:
                 other.append((cmd, doc))
 
         early.sort()
         other.sort()
 
         def earlycommands(**map):
             for c, doc in early:
                 yield {'topic': c, 'summary': doc}
 
         def othercommands(**map):
             for c, doc in other:
                 yield {'topic': c, 'summary': doc}
 
         return tmpl('helptopics', topics=topics, earlycommands=earlycommands,
                     othercommands=othercommands, title='Index')
 
     # Render an index of sub-topics.
     if topicname in helpmod.subtopics:
         topics = []
         for entries, summary, _doc in helpmod.subtopics[topicname]:
             topics.append({
                 'topic': '%s.%s' % (topicname, entries[0]),
                 'basename': entries[0],
                 'summary': summary,
             })
 
         return tmpl('helptopics', topics=topics, title=topicname,
                     subindex=True)
 
     u = webutil.wsgiui.load()
     u.verbose = True
 
     # Render a page from a sub-topic.
     if '.' in topicname:
         # TODO implement support for rendering sections, like
         # `hg help` works.
         topic, subtopic = topicname.split('.', 1)
         if topic not in helpmod.subtopics:
             raise ErrorResponse(HTTP_NOT_FOUND)
     else:
         topic = topicname
         subtopic = None
 
     try:
         doc = helpmod.help_(u, commands, topic, subtopic=subtopic)
     except error.UnknownCommand:
         raise ErrorResponse(HTTP_NOT_FOUND)
     return tmpl('help', topic=topicname, doc=doc)
 
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = commands.values()

tests/test-annotate.py

@@ -1,75 +1,102
 from __future__ import absolute_import
 from __future__ import print_function
 
 import unittest
 
 from mercurial import (
     mdiff,
 )
 from mercurial.context import (
+    annotateline,
     _annotatepair,
 )
 
 class AnnotateTests(unittest.TestCase):
     """Unit tests for annotate code."""
 
     def testannotatepair(self):
         self.maxDiff = None # camelcase-required
 
         oldfctx = b'old'
         p1fctx, p2fctx, childfctx = b'p1', b'p2', b'c'
         olddata = b'a\nb\n'
         p1data = b'a\nb\nc\n'
         p2data = b'a\nc\nd\n'
         childdata = b'a\nb2\nc\nc2\nd\n'
         diffopts = mdiff.diffopts()
 
         def decorate(text, rev):
-            return ([(rev, i) for i in xrange(1, text.count(b'\n') + 1)], text)
+            return ([annotateline(fctx=rev, lineno=i)
+                     for i in xrange(1, text.count(b'\n') + 1)],
+                    text)
 
         # Basic usage
 
         oldann = decorate(olddata, oldfctx)
         p1ann = decorate(p1data, p1fctx)
         p1ann = _annotatepair([oldann], p1fctx, p1ann, False, diffopts)
-        self.assertEqual(p1ann[0], [('old', 1), ('old', 2), ('p1', 3)])
+        self.assertEqual(p1ann[0], [
+            annotateline('old', 1),
+            annotateline('old', 2),
+            annotateline('p1', 3),
+        ])
 
         p2ann = decorate(p2data, p2fctx)
         p2ann = _annotatepair([oldann], p2fctx, p2ann, False, diffopts)
-        self.assertEqual(p2ann[0], [('old', 1), ('p2', 2), ('p2', 3)])
+        self.assertEqual(p2ann[0], [
+            annotateline('old', 1),
+            annotateline('p2', 2),
+            annotateline('p2', 3),
+        ])
 
         # Test with multiple parents (note the difference caused by ordering)
 
         childann = decorate(childdata, childfctx)
         childann = _annotatepair([p1ann, p2ann], childfctx, childann, False,
                                  diffopts)
-        self.assertEqual(childann[0],
-            [('old', 1), ('c', 2), ('p2', 2), ('c', 4), ('p2', 3)]
-        )
+        self.assertEqual(childann[0], [
+            annotateline('old', 1),
+            annotateline('c', 2),
+            annotateline('p2', 2),
+            annotateline('c', 4),
+            annotateline('p2', 3),
+        ])
 
         childann = decorate(childdata, childfctx)
         childann = _annotatepair([p2ann, p1ann], childfctx, childann, False,
                                  diffopts)
-        self.assertEqual(childann[0],
-            [('old', 1), ('c', 2), ('p1', 3), ('c', 4), ('p2', 3)]
-        )
+        self.assertEqual(childann[0], [
+            annotateline('old', 1),
+            annotateline('c', 2),
+            annotateline('p1', 3),
+            annotateline('c', 4),
+            annotateline('p2', 3),
+        ])
 
         # Test with skipchild (note the difference caused by ordering)
 
         childann = decorate(childdata, childfctx)
         childann = _annotatepair([p1ann, p2ann], childfctx, childann, True,
                                  diffopts)
-        self.assertEqual(childann[0],
-            [('old', 1), ('old', 2), ('p2', 2), ('p2', 2), ('p2', 3)]
-        )
+        self.assertEqual(childann[0], [
+            annotateline('old', 1),
+            annotateline('old', 2),
+            annotateline('p2', 2),
+            annotateline('p2', 2),
+            annotateline('p2', 3),
+        ])
 
         childann = decorate(childdata, childfctx)
         childann = _annotatepair([p2ann, p1ann], childfctx, childann, True,
                                  diffopts)
-        self.assertEqual(childann[0],
-            [('old', 1), ('old', 2), ('p1', 3), ('p1', 3), ('p2', 3)]
-        )
+        self.assertEqual(childann[0], [
+            annotateline('old', 1),
+            annotateline('old', 2),
+            annotateline('p1', 3),
+            annotateline('p1', 3),
+            annotateline('p2', 3),
+        ])
 
 if __name__ == '__main__':
     import silenttestrunner
     silenttestrunner.main(__name__)