abort: added support for graft

This adds support of `graft` to `hg abort` plan.

The patch creates a seperate function `cmdutil.hgabortgraft`
so that abort logic for graft can be called independently.
This logic is registered to the statedetection API as `abortfunc`.

Results are shown as tests.

Differential Revision: https://phab.mercurial-scm.org/D6567

mercurial/cmdutil.py

@@ -1,3421 +1,3427 b''
 # cmdutil.py - help for command processing in 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 copy as copymod
 import errno
 import os
 import re
 
 from .i18n import _
 from .node import (
     hex,
     nullid,
     nullrev,
     short,
 )
 
 from . import (
     bookmarks,
     changelog,
     copies,
     crecord as crecordmod,
     dirstateguard,
     encoding,
     error,
     formatter,
     logcmdutil,
     match as matchmod,
     merge as mergemod,
     mergeutil,
     obsolete,
     patch,
     pathutil,
     phases,
     pycompat,
     repair,
     revlog,
     rewriteutil,
     scmutil,
     smartset,
     state as statemod,
     subrepoutil,
     templatekw,
     templater,
     util,
     vfs as vfsmod,
 )
 
 from .utils import (
     dateutil,
     stringutil,
 )
 
 stringio = util.stringio
 
 # templates of common command options
 
 dryrunopts = [
     ('n', 'dry-run', None,
      _('do not perform actions, just print output')),
 ]
 
 confirmopts = [
     ('', 'confirm', None,
      _('ask before applying actions')),
 ]
 
 remoteopts = [
     ('e', 'ssh', '',
      _('specify ssh command to use'), _('CMD')),
     ('', 'remotecmd', '',
      _('specify hg command to run on the remote side'), _('CMD')),
     ('', 'insecure', None,
      _('do not verify server certificate (ignoring web.cacerts config)')),
 ]
 
 walkopts = [
     ('I', 'include', [],
      _('include names matching the given patterns'), _('PATTERN')),
     ('X', 'exclude', [],
      _('exclude names matching the given patterns'), _('PATTERN')),
 ]
 
 commitopts = [
     ('m', 'message', '',
      _('use text as commit message'), _('TEXT')),
     ('l', 'logfile', '',
      _('read commit message from file'), _('FILE')),
 ]
 
 commitopts2 = [
     ('d', 'date', '',
      _('record the specified date as commit date'), _('DATE')),
     ('u', 'user', '',
      _('record the specified user as committer'), _('USER')),
 ]
 
 formatteropts = [
     ('T', 'template', '',
      _('display with template'), _('TEMPLATE')),
 ]
 
 templateopts = [
     ('', 'style', '',
      _('display using template map file (DEPRECATED)'), _('STYLE')),
     ('T', 'template', '',
      _('display with template'), _('TEMPLATE')),
 ]
 
 logopts = [
     ('p', 'patch', None, _('show patch')),
     ('g', 'git', None, _('use git extended diff format')),
     ('l', 'limit', '',
      _('limit number of changes displayed'), _('NUM')),
     ('M', 'no-merges', None, _('do not show merges')),
     ('', 'stat', None, _('output diffstat-style summary of changes')),
     ('G', 'graph', None, _("show the revision DAG")),
 ] + templateopts
 
 diffopts = [
     ('a', 'text', None, _('treat all files as text')),
     ('g', 'git', None, _('use git extended diff format')),
     ('', 'binary', None, _('generate binary diffs in git mode (default)')),
     ('', 'nodates', None, _('omit dates from diff headers'))
 ]
 
 diffwsopts = [
     ('w', 'ignore-all-space', None,
      _('ignore white space when comparing lines')),
     ('b', 'ignore-space-change', None,
      _('ignore changes in the amount of white space')),
     ('B', 'ignore-blank-lines', None,
      _('ignore changes whose lines are all blank')),
     ('Z', 'ignore-space-at-eol', None,
      _('ignore changes in whitespace at EOL')),
 ]
 
 diffopts2 = [
     ('', 'noprefix', None, _('omit a/ and b/ prefixes from filenames')),
     ('p', 'show-function', None, _('show which function each change is in')),
     ('', 'reverse', None, _('produce a diff that undoes the changes')),
 ] + diffwsopts + [
     ('U', 'unified', '',
      _('number of lines of context to show'), _('NUM')),
     ('', 'stat', None, _('output diffstat-style summary of changes')),
     ('', 'root', '', _('produce diffs relative to subdirectory'), _('DIR')),
 ]
 
 mergetoolopts = [
     ('t', 'tool', '', _('specify merge tool'), _('TOOL')),
 ]
 
 similarityopts = [
     ('s', 'similarity', '',
      _('guess renamed files by similarity (0<=s<=100)'), _('SIMILARITY'))
 ]
 
 subrepoopts = [
     ('S', 'subrepos', None,
      _('recurse into subrepositories'))
 ]
 
 debugrevlogopts = [
     ('c', 'changelog', False, _('open changelog')),
     ('m', 'manifest', False, _('open manifest')),
     ('', 'dir', '', _('open directory manifest')),
 ]
 
 # special string such that everything below this line will be ingored in the
 # editor text
 _linebelow = "^HG: ------------------------ >8 ------------------------$"
 
 def ishunk(x):
     hunkclasses = (crecordmod.uihunk, patch.recordhunk)
     return isinstance(x, hunkclasses)
 
 def newandmodified(chunks, originalchunks):
     newlyaddedandmodifiedfiles = set()
     for chunk in chunks:
         if (ishunk(chunk) and chunk.header.isnewfile() and chunk not in
             originalchunks):
             newlyaddedandmodifiedfiles.add(chunk.header.filename())
     return newlyaddedandmodifiedfiles
 
 def parsealiases(cmd):
     return cmd.split("|")
 
 def setupwrapcolorwrite(ui):
     # wrap ui.write so diff output can be labeled/colorized
     def wrapwrite(orig, *args, **kw):
         label = kw.pop(r'label', '')
         for chunk, l in patch.difflabel(lambda: args):
             orig(chunk, label=label + l)
 
     oldwrite = ui.write
     def wrap(*args, **kwargs):
         return wrapwrite(oldwrite, *args, **kwargs)
     setattr(ui, 'write', wrap)
     return oldwrite
 
 def filterchunks(ui, originalhunks, usecurses, testfile, match,
                  operation=None):
     try:
         if usecurses:
             if testfile:
                 recordfn = crecordmod.testdecorator(
                     testfile, crecordmod.testchunkselector)
             else:
                 recordfn = crecordmod.chunkselector
 
             return crecordmod.filterpatch(ui, originalhunks, recordfn,
                                           operation)
     except crecordmod.fallbackerror as e:
         ui.warn('%s\n' % e.message)
         ui.warn(_('falling back to text mode\n'))
 
     return patch.filterpatch(ui, originalhunks, match, operation)
 
 def recordfilter(ui, originalhunks, match, operation=None):
     """ Prompts the user to filter the originalhunks and return a list of
     selected hunks.
     *operation* is used for to build ui messages to indicate the user what
     kind of filtering they are doing: reverting, committing, shelving, etc.
     (see patch.filterpatch).
     """
     usecurses = crecordmod.checkcurses(ui)
     testfile = ui.config('experimental', 'crecordtest')
     oldwrite = setupwrapcolorwrite(ui)
     try:
         newchunks, newopts = filterchunks(ui, originalhunks, usecurses,
                                           testfile, match, operation)
     finally:
         ui.write = oldwrite
     return newchunks, newopts
 
 def dorecord(ui, repo, commitfunc, cmdsuggest, backupall,
             filterfn, *pats, **opts):
     opts = pycompat.byteskwargs(opts)
     if not ui.interactive():
         if cmdsuggest:
             msg = _('running non-interactively, use %s instead') % cmdsuggest
         else:
             msg = _('running non-interactively')
         raise error.Abort(msg)
 
     # make sure username is set before going interactive
     if not opts.get('user'):
         ui.username() # raise exception, username not provided
 
     def recordfunc(ui, repo, message, match, opts):
         """This is generic record driver.
 
         Its job is to interactively filter local changes, and
         accordingly prepare working directory into a state in which the
         job can be delegated to a non-interactive commit command such as
         'commit' or 'qrefresh'.
 
         After the actual job is done by non-interactive command, the
         working directory is restored to its original state.
 
         In the end we'll record interesting changes, and everything else
         will be left in place, so the user can continue working.
         """
 
         checkunfinished(repo, commit=True)
         wctx = repo[None]
         merge = len(wctx.parents()) > 1
         if merge:
             raise error.Abort(_('cannot partially commit a merge '
                                '(use "hg commit" instead)'))
 
         def fail(f, msg):
             raise error.Abort('%s: %s' % (f, msg))
 
         force = opts.get('force')
         if not force:
             vdirs = []
             match = matchmod.badmatch(match, fail)
             match.explicitdir = vdirs.append
 
         status = repo.status(match=match)
 
         overrides = {(b'ui', b'commitsubrepos'): True}
 
         with repo.ui.configoverride(overrides, b'record'):
             # subrepoutil.precommit() modifies the status
             tmpstatus = scmutil.status(copymod.copy(status[0]),
                                        copymod.copy(status[1]),
                                        copymod.copy(status[2]),
                                        copymod.copy(status[3]),
                                        copymod.copy(status[4]),
                                        copymod.copy(status[5]),
                                        copymod.copy(status[6]))
 
             # Force allows -X subrepo to skip the subrepo.
             subs, commitsubs, newstate = subrepoutil.precommit(
                 repo.ui, wctx, tmpstatus, match, force=True)
             for s in subs:
                 if s in commitsubs:
                     dirtyreason = wctx.sub(s).dirtyreason(True)
                     raise error.Abort(dirtyreason)
 
         if not force:
             repo.checkcommitpatterns(wctx, vdirs, match, status, fail)
         diffopts = patch.difffeatureopts(ui, opts=opts, whitespace=True,
                                          section='commands',
                                          configprefix='commit.interactive.')
         diffopts.nodates = True
         diffopts.git = True
         diffopts.showfunc = True
         originaldiff = patch.diff(repo, changes=status, opts=diffopts)
         originalchunks = patch.parsepatch(originaldiff)
         match = scmutil.match(repo[None], pats)
 
         # 1. filter patch, since we are intending to apply subset of it
         try:
             chunks, newopts = filterfn(ui, originalchunks, match)
         except error.PatchError as err:
             raise error.Abort(_('error parsing patch: %s') % err)
         opts.update(newopts)
 
         # We need to keep a backup of files that have been newly added and
         # modified during the recording process because there is a previous
         # version without the edit in the workdir
         newlyaddedandmodifiedfiles = newandmodified(chunks, originalchunks)
         contenders = set()
         for h in chunks:
             try:
                 contenders.update(set(h.files()))
             except AttributeError:
                 pass
 
         changed = status.modified + status.added + status.removed
         newfiles = [f for f in changed if f in contenders]
         if not newfiles:
             ui.status(_('no changes to record\n'))
             return 0
 
         modified = set(status.modified)
 
         # 2. backup changed files, so we can restore them in the end
 
         if backupall:
             tobackup = changed
         else:
             tobackup = [f for f in newfiles if f in modified or f in
                         newlyaddedandmodifiedfiles]
         backups = {}
         if tobackup:
             backupdir = repo.vfs.join('record-backups')
             try:
                 os.mkdir(backupdir)
             except OSError as err:
                 if err.errno != errno.EEXIST:
                     raise
         try:
             # backup continues
             for f in tobackup:
                 fd, tmpname = pycompat.mkstemp(prefix=f.replace('/', '_') + '.',
                                                dir=backupdir)
                 os.close(fd)
                 ui.debug('backup %r as %r\n' % (f, tmpname))
                 util.copyfile(repo.wjoin(f), tmpname, copystat=True)
                 backups[f] = tmpname
 
             fp = stringio()
             for c in chunks:
                 fname = c.filename()
                 if fname in backups:
                     c.write(fp)
             dopatch = fp.tell()
             fp.seek(0)
 
             # 2.5 optionally review / modify patch in text editor
             if opts.get('review', False):
                 patchtext = (crecordmod.diffhelptext
                              + crecordmod.patchhelptext
                              + fp.read())
                 reviewedpatch = ui.edit(patchtext, "",
                                         action="diff",
                                         repopath=repo.path)
                 fp.truncate(0)
                 fp.write(reviewedpatch)
                 fp.seek(0)
 
             [os.unlink(repo.wjoin(c)) for c in newlyaddedandmodifiedfiles]
             # 3a. apply filtered patch to clean repo  (clean)
             if backups:
                 # Equivalent to hg.revert
                 m = scmutil.matchfiles(repo, backups.keys())
                 mergemod.update(repo, repo.dirstate.p1(), branchmerge=False,
                                 force=True, matcher=m)
 
             # 3b. (apply)
             if dopatch:
                 try:
                     ui.debug('applying patch\n')
                     ui.debug(fp.getvalue())
                     patch.internalpatch(ui, repo, fp, 1, eolmode=None)
                 except error.PatchError as err:
                     raise error.Abort(pycompat.bytestr(err))
             del fp
 
             # 4. We prepared working directory according to filtered
             #    patch. Now is the time to delegate the job to
             #    commit/qrefresh or the like!
 
             # Make all of the pathnames absolute.
             newfiles = [repo.wjoin(nf) for nf in newfiles]
             return commitfunc(ui, repo, *newfiles, **pycompat.strkwargs(opts))
         finally:
             # 5. finally restore backed-up files
             try:
                 dirstate = repo.dirstate
                 for realname, tmpname in backups.iteritems():
                     ui.debug('restoring %r to %r\n' % (tmpname, realname))
 
                     if dirstate[realname] == 'n':
                         # without normallookup, restoring timestamp
                         # may cause partially committed files
                         # to be treated as unmodified
                         dirstate.normallookup(realname)
 
                     # copystat=True here and above are a hack to trick any
                     # editors that have f open that we haven't modified them.
                     #
                     # Also note that this racy as an editor could notice the
                     # file's mtime before we've finished writing it.
                     util.copyfile(tmpname, repo.wjoin(realname), copystat=True)
                     os.unlink(tmpname)
                 if tobackup:
                     os.rmdir(backupdir)
             except OSError:
                 pass
 
     def recordinwlock(ui, repo, message, match, opts):
         with repo.wlock():
             return recordfunc(ui, repo, message, match, opts)
 
     return commit(ui, repo, recordinwlock, pats, opts)
 
 class dirnode(object):
     """
     Represent a directory in user working copy with information required for
     the purpose of tersing its status.
 
     path is the path to the directory, without a trailing '/'
 
     statuses is a set of statuses of all files in this directory (this includes
     all the files in all the subdirectories too)
 
     files is a list of files which are direct child of this directory
 
     subdirs is a dictionary of sub-directory name as the key and it's own
     dirnode object as the value
     """
 
     def __init__(self, dirpath):
         self.path = dirpath
         self.statuses = set()
         self.files = []
         self.subdirs = {}
 
     def _addfileindir(self, filename, status):
         """Add a file in this directory as a direct child."""
         self.files.append((filename, status))
 
     def addfile(self, filename, status):
         """
         Add a file to this directory or to its direct parent directory.
 
         If the file is not direct child of this directory, we traverse to the
         directory of which this file is a direct child of and add the file
         there.
         """
 
         # the filename contains a path separator, it means it's not the direct
         # child of this directory
         if '/' in filename:
             subdir, filep = filename.split('/', 1)
 
             # does the dirnode object for subdir exists
             if subdir not in self.subdirs:
                 subdirpath = pathutil.join(self.path, subdir)
                 self.subdirs[subdir] = dirnode(subdirpath)
 
             # try adding the file in subdir
             self.subdirs[subdir].addfile(filep, status)
 
         else:
             self._addfileindir(filename, status)
 
         if status not in self.statuses:
             self.statuses.add(status)
 
     def iterfilepaths(self):
         """Yield (status, path) for files directly under this directory."""
         for f, st in self.files:
             yield st, pathutil.join(self.path, f)
 
     def tersewalk(self, terseargs):
         """
         Yield (status, path) obtained by processing the status of this
         dirnode.
 
         terseargs is the string of arguments passed by the user with `--terse`
         flag.
 
         Following are the cases which can happen:
 
         1) All the files in the directory (including all the files in its
         subdirectories) share the same status and the user has asked us to terse
         that status. -> yield (status, dirpath).  dirpath will end in '/'.
 
         2) Otherwise, we do following:
 
                 a) Yield (status, filepath)  for all the files which are in this
                     directory (only the ones in this directory, not the subdirs)
 
                 b) Recurse the function on all the subdirectories of this
                    directory
         """
 
         if len(self.statuses) == 1:
             onlyst = self.statuses.pop()
 
             # Making sure we terse only when the status abbreviation is
             # passed as terse argument
             if onlyst in terseargs:
                 yield onlyst, self.path + '/'
                 return
 
         # add the files to status list
         for st, fpath in self.iterfilepaths():
             yield st, fpath
 
         #recurse on the subdirs
         for dirobj in self.subdirs.values():
             for st, fpath in dirobj.tersewalk(terseargs):
                 yield st, fpath
 
 def tersedir(statuslist, terseargs):
     """
     Terse the status if all the files in a directory shares the same status.
 
     statuslist is scmutil.status() object which contains a list of files for
     each status.
     terseargs is string which is passed by the user as the argument to `--terse`
     flag.
 
     The function makes a tree of objects of dirnode class, and at each node it
     stores the information required to know whether we can terse a certain
     directory or not.
     """
     # the order matters here as that is used to produce final list
     allst = ('m', 'a', 'r', 'd', 'u', 'i', 'c')
 
     # checking the argument validity
     for s in pycompat.bytestr(terseargs):
         if s not in allst:
             raise error.Abort(_("'%s' not recognized") % s)
 
     # creating a dirnode object for the root of the repo
     rootobj = dirnode('')
     pstatus = ('modified', 'added', 'deleted', 'clean', 'unknown',
                'ignored', 'removed')
 
     tersedict = {}
     for attrname in pstatus:
         statuschar = attrname[0:1]
         for f in getattr(statuslist, attrname):
             rootobj.addfile(f, statuschar)
         tersedict[statuschar] = []
 
     # we won't be tersing the root dir, so add files in it
     for st, fpath in rootobj.iterfilepaths():
         tersedict[st].append(fpath)
 
     # process each sub-directory and build tersedict
     for subdir in rootobj.subdirs.values():
         for st, f in subdir.tersewalk(terseargs):
             tersedict[st].append(f)
 
     tersedlist = []
     for st in allst:
         tersedict[st].sort()
         tersedlist.append(tersedict[st])
 
     return tersedlist
 
 def _commentlines(raw):
     '''Surround lineswith a comment char and a new line'''
     lines = raw.splitlines()
     commentedlines = ['# %s' % line for line in lines]
     return '\n'.join(commentedlines) + '\n'
 
 def _conflictsmsg(repo):
     mergestate = mergemod.mergestate.read(repo)
     if not mergestate.active():
         return
 
     m = scmutil.match(repo[None])
     unresolvedlist = [f for f in mergestate.unresolved() if m(f)]
     if unresolvedlist:
         mergeliststr = '\n'.join(
             ['    %s' % util.pathto(repo.root, encoding.getcwd(), path)
              for path in sorted(unresolvedlist)])
         msg = _('''Unresolved merge conflicts:
 
 %s
 
 To mark files as resolved:  hg resolve --mark FILE''') % mergeliststr
     else:
         msg = _('No unresolved merge conflicts.')
 
     return _commentlines(msg)
 
 def morestatus(repo, fm):
     statetuple = statemod.getrepostate(repo)
     label = 'status.morestatus'
     if statetuple:
         state, helpfulmsg = statetuple
         statemsg = _('The repository is in an unfinished *%s* state.') % state
         fm.plain('%s\n' % _commentlines(statemsg), label=label)
         conmsg = _conflictsmsg(repo)
         if conmsg:
             fm.plain('%s\n' % conmsg, label=label)
         if helpfulmsg:
             fm.plain('%s\n' % _commentlines(helpfulmsg), label=label)
 
 def findpossible(cmd, table, strict=False):
     """
     Return cmd -> (aliases, command table entry)
     for each matching command.
     Return debug commands (or their aliases) only if no normal command matches.
     """
     choice = {}
     debugchoice = {}
 
     if cmd in table:
         # short-circuit exact matches, "log" alias beats "log|history"
         keys = [cmd]
     else:
         keys = table.keys()
 
     allcmds = []
     for e in keys:
         aliases = parsealiases(e)
         allcmds.extend(aliases)
         found = None
         if cmd in aliases:
             found = cmd
         elif not strict:
             for a in aliases:
                 if a.startswith(cmd):
                     found = a
                     break
         if found is not None:
             if aliases[0].startswith("debug") or found.startswith("debug"):
                 debugchoice[found] = (aliases, table[e])
             else:
                 choice[found] = (aliases, table[e])
 
     if not choice and debugchoice:
         choice = debugchoice
 
     return choice, allcmds
 
 def findcmd(cmd, table, strict=True):
     """Return (aliases, command table entry) for command string."""
     choice, allcmds = findpossible(cmd, table, strict)
 
     if cmd in choice:
         return choice[cmd]
 
     if len(choice) > 1:
         clist = sorted(choice)
         raise error.AmbiguousCommand(cmd, clist)
 
     if choice:
         return list(choice.values())[0]
 
     raise error.UnknownCommand(cmd, allcmds)
 
 def changebranch(ui, repo, revs, label):
     """ Change the branch name of given revs to label """
 
     with repo.wlock(), repo.lock(), repo.transaction('branches'):
         # abort in case of uncommitted merge or dirty wdir
         bailifchanged(repo)
         revs = scmutil.revrange(repo, revs)
         if not revs:
             raise error.Abort("empty revision set")
         roots = repo.revs('roots(%ld)', revs)
         if len(roots) > 1:
             raise error.Abort(_("cannot change branch of non-linear revisions"))
         rewriteutil.precheck(repo, revs, 'change branch of')
 
         root = repo[roots.first()]
         rpb = {parent.branch() for parent in root.parents()}
         if label not in rpb and label in repo.branchmap():
             raise error.Abort(_("a branch of the same name already exists"))
 
         if repo.revs('obsolete() and %ld', revs):
             raise error.Abort(_("cannot change branch of a obsolete changeset"))
 
         # make sure only topological heads
         if repo.revs('heads(%ld) - head()', revs):
             raise error.Abort(_("cannot change branch in middle of a stack"))
 
         replacements = {}
         # avoid import cycle mercurial.cmdutil -> mercurial.context ->
         # mercurial.subrepo -> mercurial.cmdutil
         from . import context
         for rev in revs:
             ctx = repo[rev]
             oldbranch = ctx.branch()
             # check if ctx has same branch
             if oldbranch == label:
                 continue
 
             def filectxfn(repo, newctx, path):
                 try:
                     return ctx[path]
                 except error.ManifestLookupError:
                     return None
 
             ui.debug("changing branch of '%s' from '%s' to '%s'\n"
                      % (hex(ctx.node()), oldbranch, label))
             extra = ctx.extra()
             extra['branch_change'] = hex(ctx.node())
             # While changing branch of set of linear commits, make sure that
             # we base our commits on new parent rather than old parent which
             # was obsoleted while changing the branch
             p1 = ctx.p1().node()
             p2 = ctx.p2().node()
             if p1 in replacements:
                 p1 = replacements[p1][0]
             if p2 in replacements:
                 p2 = replacements[p2][0]
 
             mc = context.memctx(repo, (p1, p2),
                                 ctx.description(),
                                 ctx.files(),
                                 filectxfn,
                                 user=ctx.user(),
                                 date=ctx.date(),
                                 extra=extra,
                                 branch=label)
 
             newnode = repo.commitctx(mc)
             replacements[ctx.node()] = (newnode,)
             ui.debug('new node id is %s\n' % hex(newnode))
 
         # create obsmarkers and move bookmarks
         scmutil.cleanupnodes(repo, replacements, 'branch-change', fixphase=True)
 
         # move the working copy too
         wctx = repo[None]
         # in-progress merge is a bit too complex for now.
         if len(wctx.parents()) == 1:
             newid = replacements.get(wctx.p1().node())
             if newid is not None:
                 # avoid import cycle mercurial.cmdutil -> mercurial.hg ->
                 # mercurial.cmdutil
                 from . import hg
                 hg.update(repo, newid[0], quietempty=True)
 
         ui.status(_("changed branch on %d changesets\n") % len(replacements))
 
 def findrepo(p):
     while not os.path.isdir(os.path.join(p, ".hg")):
         oldp, p = p, os.path.dirname(p)
         if p == oldp:
             return None
 
     return p
 
 def bailifchanged(repo, merge=True, hint=None):
     """ enforce the precondition that working directory must be clean.
 
     'merge' can be set to false if a pending uncommitted merge should be
     ignored (such as when 'update --check' runs).
 
     'hint' is the usual hint given to Abort exception.
     """
 
     if merge and repo.dirstate.p2() != nullid:
         raise error.Abort(_('outstanding uncommitted merge'), hint=hint)
     modified, added, removed, deleted = repo.status()[:4]
     if modified or added or removed or deleted:
         raise error.Abort(_('uncommitted changes'), hint=hint)
     ctx = repo[None]
     for s in sorted(ctx.substate):
         ctx.sub(s).bailifchanged(hint=hint)
 
 def logmessage(ui, opts):
     """ get the log message according to -m and -l option """
     message = opts.get('message')
     logfile = opts.get('logfile')
 
     if message and logfile:
         raise error.Abort(_('options --message and --logfile are mutually '
                            'exclusive'))
     if not message and logfile:
         try:
             if isstdiofilename(logfile):
                 message = ui.fin.read()
             else:
                 message = '\n'.join(util.readfile(logfile).splitlines())
         except IOError as inst:
             raise error.Abort(_("can't read commit message '%s': %s") %
                              (logfile, encoding.strtolocal(inst.strerror)))
     return message
 
 def mergeeditform(ctxorbool, baseformname):
     """return appropriate editform name (referencing a committemplate)
 
     'ctxorbool' is either a ctx to be committed, or a bool indicating whether
     merging is committed.
 
     This returns baseformname with '.merge' appended if it is a merge,
     otherwise '.normal' is appended.
     """
     if isinstance(ctxorbool, bool):
         if ctxorbool:
             return baseformname + ".merge"
     elif len(ctxorbool.parents()) > 1:
         return baseformname + ".merge"
 
     return baseformname + ".normal"
 
 def getcommiteditor(edit=False, finishdesc=None, extramsg=None,
                     editform='', **opts):
     """get appropriate commit message editor according to '--edit' option
 
     'finishdesc' is a function to be called with edited commit message
     (= 'description' of the new changeset) just after editing, but
     before checking empty-ness. It should return actual text to be
     stored into history. This allows to change description before
     storing.
 
     'extramsg' is a extra message to be shown in the editor instead of
     'Leave message empty to abort commit' line. 'HG: ' prefix and EOL
     is automatically added.
 
     'editform' is a dot-separated list of names, to distinguish
     the purpose of commit text editing.
 
     'getcommiteditor' returns 'commitforceeditor' regardless of
     'edit', if one of 'finishdesc' or 'extramsg' is specified, because
     they are specific for usage in MQ.
     """
     if edit or finishdesc or extramsg:
         return lambda r, c, s: commitforceeditor(r, c, s,
                                                  finishdesc=finishdesc,
                                                  extramsg=extramsg,
                                                  editform=editform)
     elif editform:
         return lambda r, c, s: commiteditor(r, c, s, editform=editform)
     else:
         return commiteditor
 
 def _escapecommandtemplate(tmpl):
     parts = []
     for typ, start, end in templater.scantemplate(tmpl, raw=True):
         if typ == b'string':
             parts.append(stringutil.escapestr(tmpl[start:end]))
         else:
             parts.append(tmpl[start:end])
     return b''.join(parts)
 
 def rendercommandtemplate(ui, tmpl, props):
     r"""Expand a literal template 'tmpl' in a way suitable for command line
 
     '\' in outermost string is not taken as an escape character because it
     is a directory separator on Windows.
 
     >>> from . import ui as uimod
     >>> ui = uimod.ui()
     >>> rendercommandtemplate(ui, b'c:\\{path}', {b'path': b'foo'})
     'c:\\foo'
     >>> rendercommandtemplate(ui, b'{"c:\\{path}"}', {'path': b'foo'})
     'c:{path}'
     """
     if not tmpl:
         return tmpl
     t = formatter.maketemplater(ui, _escapecommandtemplate(tmpl))
     return t.renderdefault(props)
 
 def rendertemplate(ctx, tmpl, props=None):
     """Expand a literal template 'tmpl' byte-string against one changeset
 
     Each props item must be a stringify-able value or a callable returning
     such value, i.e. no bare list nor dict should be passed.
     """
     repo = ctx.repo()
     tres = formatter.templateresources(repo.ui, repo)
     t = formatter.maketemplater(repo.ui, tmpl, defaults=templatekw.keywords,
                                 resources=tres)
     mapping = {'ctx': ctx}
     if props:
         mapping.update(props)
     return t.renderdefault(mapping)
 
 def _buildfntemplate(pat, total=None, seqno=None, revwidth=None, pathname=None):
     r"""Convert old-style filename format string to template string
 
     >>> _buildfntemplate(b'foo-%b-%n.patch', seqno=0)
     'foo-{reporoot|basename}-{seqno}.patch'
     >>> _buildfntemplate(b'%R{tags % "{tag}"}%H')
     '{rev}{tags % "{tag}"}{node}'
 
     '\' in outermost strings has to be escaped because it is a directory
     separator on Windows:
 
     >>> _buildfntemplate(b'c:\\tmp\\%R\\%n.patch', seqno=0)
     'c:\\\\tmp\\\\{rev}\\\\{seqno}.patch'
     >>> _buildfntemplate(b'\\\\foo\\bar.patch')
     '\\\\\\\\foo\\\\bar.patch'
     >>> _buildfntemplate(b'\\{tags % "{tag}"}')
     '\\\\{tags % "{tag}"}'
 
     but inner strings follow the template rules (i.e. '\' is taken as an
     escape character):
 
     >>> _buildfntemplate(br'{"c:\tmp"}', seqno=0)
     '{"c:\\tmp"}'
     """
     expander = {
         b'H': b'{node}',
         b'R': b'{rev}',
         b'h': b'{node|short}',
         b'm': br'{sub(r"[^\w]", "_", desc|firstline)}',
         b'r': b'{if(revwidth, pad(rev, revwidth, "0", left=True), rev)}',
         b'%': b'%',
         b'b': b'{reporoot|basename}',
     }
     if total is not None:
         expander[b'N'] = b'{total}'
     if seqno is not None:
         expander[b'n'] = b'{seqno}'
     if total is not None and seqno is not None:
         expander[b'n'] = b'{pad(seqno, total|stringify|count, "0", left=True)}'
     if pathname is not None:
         expander[b's'] = b'{pathname|basename}'
         expander[b'd'] = b'{if(pathname|dirname, pathname|dirname, ".")}'
         expander[b'p'] = b'{pathname}'
 
     newname = []
     for typ, start, end in templater.scantemplate(pat, raw=True):
         if typ != b'string':
             newname.append(pat[start:end])
             continue
         i = start
         while i < end:
             n = pat.find(b'%', i, end)
             if n < 0:
                 newname.append(stringutil.escapestr(pat[i:end]))
                 break
             newname.append(stringutil.escapestr(pat[i:n]))
             if n + 2 > end:
                 raise error.Abort(_("incomplete format spec in output "
                                     "filename"))
             c = pat[n + 1:n + 2]
             i = n + 2
             try:
                 newname.append(expander[c])
             except KeyError:
                 raise error.Abort(_("invalid format spec '%%%s' in output "
                                     "filename") % c)
     return ''.join(newname)
 
 def makefilename(ctx, pat, **props):
     if not pat:
         return pat
     tmpl = _buildfntemplate(pat, **props)
     # BUG: alias expansion shouldn't be made against template fragments
     # rewritten from %-format strings, but we have no easy way to partially
     # disable the expansion.
     return rendertemplate(ctx, tmpl, pycompat.byteskwargs(props))
 
 def isstdiofilename(pat):
     """True if the given pat looks like a filename denoting stdin/stdout"""
     return not pat or pat == '-'
 
 class _unclosablefile(object):
     def __init__(self, fp):
         self._fp = fp
 
     def close(self):
         pass
 
     def __iter__(self):
         return iter(self._fp)
 
     def __getattr__(self, attr):
         return getattr(self._fp, attr)
 
     def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_value, exc_tb):
         pass
 
 def makefileobj(ctx, pat, mode='wb', **props):
     writable = mode not in ('r', 'rb')
 
     if isstdiofilename(pat):
         repo = ctx.repo()
         if writable:
             fp = repo.ui.fout
         else:
             fp = repo.ui.fin
         return _unclosablefile(fp)
     fn = makefilename(ctx, pat, **props)
     return open(fn, mode)
 
 def openstorage(repo, cmd, file_, opts, returnrevlog=False):
     """opens the changelog, manifest, a filelog or a given revlog"""
     cl = opts['changelog']
     mf = opts['manifest']
     dir = opts['dir']
     msg = None
     if cl and mf:
         msg = _('cannot specify --changelog and --manifest at the same time')
     elif cl and dir:
         msg = _('cannot specify --changelog and --dir at the same time')
     elif cl or mf or dir:
         if file_:
             msg = _('cannot specify filename with --changelog or --manifest')
         elif not repo:
             msg = _('cannot specify --changelog or --manifest or --dir '
                     'without a repository')
     if msg:
         raise error.Abort(msg)
 
     r = None
     if repo:
         if cl:
             r = repo.unfiltered().changelog
         elif dir:
             if 'treemanifest' not in repo.requirements:
                 raise error.Abort(_("--dir can only be used on repos with "
                                    "treemanifest enabled"))
             if not dir.endswith('/'):
                 dir = dir + '/'
             dirlog = repo.manifestlog.getstorage(dir)
             if len(dirlog):
                 r = dirlog
         elif mf:
             r = repo.manifestlog.getstorage(b'')
         elif file_:
             filelog = repo.file(file_)
             if len(filelog):
                 r = filelog
 
         # Not all storage may be revlogs. If requested, try to return an actual
         # revlog instance.
         if returnrevlog:
             if isinstance(r, revlog.revlog):
                 pass
             elif util.safehasattr(r, '_revlog'):
                 r = r._revlog
             elif r is not None:
                 raise error.Abort(_('%r does not appear to be a revlog') % r)
 
     if not r:
         if not returnrevlog:
             raise error.Abort(_('cannot give path to non-revlog'))
 
         if not file_:
             raise error.CommandError(cmd, _('invalid arguments'))
         if not os.path.isfile(file_):
             raise error.Abort(_("revlog '%s' not found") % file_)
         r = revlog.revlog(vfsmod.vfs(encoding.getcwd(), audit=False),
                           file_[:-2] + ".i")
     return r
 
 def openrevlog(repo, cmd, file_, opts):
     """Obtain a revlog backing storage of an item.
 
     This is similar to ``openstorage()`` except it always returns a revlog.
 
     In most cases, a caller cares about the main storage object - not the
     revlog backing it. Therefore, this function should only be used by code
     that needs to examine low-level revlog implementation details. e.g. debug
     commands.
     """
     return openstorage(repo, cmd, file_, opts, returnrevlog=True)
 
 def copy(ui, repo, pats, opts, rename=False):
     # called with the repo lock held
     #
     # hgsep => pathname that uses "/" to separate directories
     # ossep => pathname that uses os.sep to separate directories
     cwd = repo.getcwd()
     targets = {}
     after = opts.get("after")
     dryrun = opts.get("dry_run")
     wctx = repo[None]
 
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     def walkpat(pat):
         srcs = []
         if after:
             badstates = '?'
         else:
             badstates = '?r'
         m = scmutil.match(wctx, [pat], opts, globbed=True)
         for abs in wctx.walk(m):
             state = repo.dirstate[abs]
             rel = uipathfn(abs)
             exact = m.exact(abs)
             if state in badstates:
                 if exact and state == '?':
                     ui.warn(_('%s: not copying - file is not managed\n') % rel)
                 if exact and state == 'r':
                     ui.warn(_('%s: not copying - file has been marked for'
                               ' remove\n') % rel)
                 continue
             # abs: hgsep
             # rel: ossep
             srcs.append((abs, rel, exact))
         return srcs
 
     # abssrc: hgsep
     # relsrc: ossep
     # otarget: ossep
     def copyfile(abssrc, relsrc, otarget, exact):
         abstarget = pathutil.canonpath(repo.root, cwd, otarget)
         if '/' in abstarget:
             # We cannot normalize abstarget itself, this would prevent
             # case only renames, like a => A.
             abspath, absname = abstarget.rsplit('/', 1)
             abstarget = repo.dirstate.normalize(abspath) + '/' + absname
         reltarget = repo.pathto(abstarget, cwd)
         target = repo.wjoin(abstarget)
         src = repo.wjoin(abssrc)
         state = repo.dirstate[abstarget]
 
         scmutil.checkportable(ui, abstarget)
 
         # check for collisions
         prevsrc = targets.get(abstarget)
         if prevsrc is not None:
             ui.warn(_('%s: not overwriting - %s collides with %s\n') %
                     (reltarget, repo.pathto(abssrc, cwd),
                      repo.pathto(prevsrc, cwd)))
             return True # report a failure
 
         # check for overwrites
         exists = os.path.lexists(target)
         samefile = False
         if exists and abssrc != abstarget:
             if (repo.dirstate.normalize(abssrc) ==
                 repo.dirstate.normalize(abstarget)):
                 if not rename:
                     ui.warn(_("%s: can't copy - same file\n") % reltarget)
                     return True # report a failure
                 exists = False
                 samefile = True
 
         if not after and exists or after and state in 'mn':
             if not opts['force']:
                 if state in 'mn':
                     msg = _('%s: not overwriting - file already committed\n')
                     if after:
                         flags = '--after --force'
                     else:
                         flags = '--force'
                     if rename:
                         hint = _("('hg rename %s' to replace the file by "
                                  'recording a rename)\n') % flags
                     else:
                         hint = _("('hg copy %s' to replace the file by "
                                  'recording a copy)\n') % flags
                 else:
                     msg = _('%s: not overwriting - file exists\n')
                     if rename:
                         hint = _("('hg rename --after' to record the rename)\n")
                     else:
                         hint = _("('hg copy --after' to record the copy)\n")
                 ui.warn(msg % reltarget)
                 ui.warn(hint)
                 return True # report a failure
 
         if after:
             if not exists:
                 if rename:
                     ui.warn(_('%s: not recording move - %s does not exist\n') %
                             (relsrc, reltarget))
                 else:
                     ui.warn(_('%s: not recording copy - %s does not exist\n') %
                             (relsrc, reltarget))
                 return True # report a failure
         elif not dryrun:
             try:
                 if exists:
                     os.unlink(target)
                 targetdir = os.path.dirname(target) or '.'
                 if not os.path.isdir(targetdir):
                     os.makedirs(targetdir)
                 if samefile:
                     tmp = target + "~hgrename"
                     os.rename(src, tmp)
                     os.rename(tmp, target)
                 else:
                     # Preserve stat info on renames, not on copies; this matches
                     # Linux CLI behavior.
                     util.copyfile(src, target, copystat=rename)
                 srcexists = True
             except IOError as inst:
                 if inst.errno == errno.ENOENT:
                     ui.warn(_('%s: deleted in working directory\n') % relsrc)
                     srcexists = False
                 else:
                     ui.warn(_('%s: cannot copy - %s\n') %
                             (relsrc, encoding.strtolocal(inst.strerror)))
                     return True # report a failure
 
         if ui.verbose or not exact:
             if rename:
                 ui.status(_('moving %s to %s\n') % (relsrc, reltarget))
             else:
                 ui.status(_('copying %s to %s\n') % (relsrc, reltarget))
 
         targets[abstarget] = abssrc
 
         # fix up dirstate
         scmutil.dirstatecopy(ui, repo, wctx, abssrc, abstarget,
                              dryrun=dryrun, cwd=cwd)
         if rename and not dryrun:
             if not after and srcexists and not samefile:
                 rmdir = repo.ui.configbool('experimental', 'removeemptydirs')
                 repo.wvfs.unlinkpath(abssrc, rmdir=rmdir)
             wctx.forget([abssrc])
 
     # pat: ossep
     # dest ossep
     # srcs: list of (hgsep, hgsep, ossep, bool)
     # return: function that takes hgsep and returns ossep
     def targetpathfn(pat, dest, srcs):
         if os.path.isdir(pat):
             abspfx = pathutil.canonpath(repo.root, cwd, pat)
             abspfx = util.localpath(abspfx)
             if destdirexists:
                 striplen = len(os.path.split(abspfx)[0])
             else:
                 striplen = len(abspfx)
             if striplen:
                 striplen += len(pycompat.ossep)
             res = lambda p: os.path.join(dest, util.localpath(p)[striplen:])
         elif destdirexists:
             res = lambda p: os.path.join(dest,
                                          os.path.basename(util.localpath(p)))
         else:
             res = lambda p: dest
         return res
 
     # pat: ossep
     # dest ossep
     # srcs: list of (hgsep, hgsep, ossep, bool)
     # return: function that takes hgsep and returns ossep
     def targetpathafterfn(pat, dest, srcs):
         if matchmod.patkind(pat):
             # a mercurial pattern
             res = lambda p: os.path.join(dest,
                                          os.path.basename(util.localpath(p)))
         else:
             abspfx = pathutil.canonpath(repo.root, cwd, pat)
             if len(abspfx) < len(srcs[0][0]):
                 # A directory. Either the target path contains the last
                 # component of the source path or it does not.
                 def evalpath(striplen):
                     score = 0
                     for s in srcs:
                         t = os.path.join(dest, util.localpath(s[0])[striplen:])
                         if os.path.lexists(t):
                             score += 1
                     return score
 
                 abspfx = util.localpath(abspfx)
                 striplen = len(abspfx)
                 if striplen:
                     striplen += len(pycompat.ossep)
                 if os.path.isdir(os.path.join(dest, os.path.split(abspfx)[1])):
                     score = evalpath(striplen)
                     striplen1 = len(os.path.split(abspfx)[0])
                     if striplen1:
                         striplen1 += len(pycompat.ossep)
                     if evalpath(striplen1) > score:
                         striplen = striplen1
                 res = lambda p: os.path.join(dest,
                                              util.localpath(p)[striplen:])
             else:
                 # a file
                 if destdirexists:
                     res = lambda p: os.path.join(dest,
                                         os.path.basename(util.localpath(p)))
                 else:
                     res = lambda p: dest
         return res
 
     pats = scmutil.expandpats(pats)
     if not pats:
         raise error.Abort(_('no source or destination specified'))
     if len(pats) == 1:
         raise error.Abort(_('no destination specified'))
     dest = pats.pop()
     destdirexists = os.path.isdir(dest) and not os.path.islink(dest)
     if not destdirexists:
         if len(pats) > 1 or matchmod.patkind(pats[0]):
             raise error.Abort(_('with multiple sources, destination must be an '
                                'existing directory'))
         if util.endswithsep(dest):
             raise error.Abort(_('destination %s is not a directory') % dest)
 
     tfn = targetpathfn
     if after:
         tfn = targetpathafterfn
     copylist = []
     for pat in pats:
         srcs = walkpat(pat)
         if not srcs:
             continue
         copylist.append((tfn(pat, dest, srcs), srcs))
     if not copylist:
         raise error.Abort(_('no files to copy'))
 
     errors = 0
     for targetpath, srcs in copylist:
         for abssrc, relsrc, exact in srcs:
             if copyfile(abssrc, relsrc, targetpath(abssrc), exact):
                 errors += 1
 
     return errors != 0
 
 ## facility to let extension process additional data into an import patch
 # list of identifier to be executed in order
 extrapreimport = []  # run before commit
 extrapostimport = [] # run after commit
 # mapping from identifier to actual import function
 #
 # 'preimport' are run before the commit is made and are provided the following
 # arguments:
 # - repo: the localrepository instance,
 # - patchdata: data extracted from patch header (cf m.patch.patchheadermap),
 # - extra: the future extra dictionary of the changeset, please mutate it,
 # - opts: the import options.
 # XXX ideally, we would just pass an ctx ready to be computed, that would allow
 # mutation of in memory commit and more. Feel free to rework the code to get
 # there.
 extrapreimportmap = {}
 # 'postimport' are run after the commit is made and are provided the following
 # argument:
 # - ctx: the changectx created by import.
 extrapostimportmap = {}
 
 def tryimportone(ui, repo, patchdata, parents, opts, msgs, updatefunc):
     """Utility function used by commands.import to import a single patch
 
     This function is explicitly defined here to help the evolve extension to
     wrap this part of the import logic.
 
     The API is currently a bit ugly because it a simple code translation from
     the import command. Feel free to make it better.
 
     :patchdata: a dictionary containing parsed patch data (such as from
                 ``patch.extract()``)
     :parents: nodes that will be parent of the created commit
     :opts: the full dict of option passed to the import command
     :msgs: list to save commit message to.
            (used in case we need to save it when failing)
     :updatefunc: a function that update a repo to a given node
                  updatefunc(<repo>, <node>)
     """
     # avoid cycle context -> subrepo -> cmdutil
     from . import context
 
     tmpname = patchdata.get('filename')
     message = patchdata.get('message')
     user = opts.get('user') or patchdata.get('user')
     date = opts.get('date') or patchdata.get('date')
     branch = patchdata.get('branch')
     nodeid = patchdata.get('nodeid')
     p1 = patchdata.get('p1')
     p2 = patchdata.get('p2')
 
     nocommit = opts.get('no_commit')
     importbranch = opts.get('import_branch')
     update = not opts.get('bypass')
     strip = opts["strip"]
     prefix = opts["prefix"]
     sim = float(opts.get('similarity') or 0)
 
     if not tmpname:
         return None, None, False
 
     rejects = False
 
     cmdline_message = logmessage(ui, opts)
     if cmdline_message:
         # pickup the cmdline msg
         message = cmdline_message
     elif message:
         # pickup the patch msg
         message = message.strip()
     else:
         # launch the editor
         message = None
     ui.debug('message:\n%s\n' % (message or ''))
 
     if len(parents) == 1:
         parents.append(repo[nullid])
     if opts.get('exact'):
         if not nodeid or not p1:
             raise error.Abort(_('not a Mercurial patch'))
         p1 = repo[p1]
         p2 = repo[p2 or nullid]
     elif p2:
         try:
             p1 = repo[p1]
             p2 = repo[p2]
             # Without any options, consider p2 only if the
             # patch is being applied on top of the recorded
             # first parent.
             if p1 != parents[0]:
                 p1 = parents[0]
                 p2 = repo[nullid]
         except error.RepoError:
             p1, p2 = parents
         if p2.node() == nullid:
             ui.warn(_("warning: import the patch as a normal revision\n"
                       "(use --exact to import the patch as a merge)\n"))
     else:
         p1, p2 = parents
 
     n = None
     if update:
         if p1 != parents[0]:
             updatefunc(repo, p1.node())
         if p2 != parents[1]:
             repo.setparents(p1.node(), p2.node())
 
         if opts.get('exact') or importbranch:
             repo.dirstate.setbranch(branch or 'default')
 
         partial = opts.get('partial', False)
         files = set()
         try:
             patch.patch(ui, repo, tmpname, strip=strip, prefix=prefix,
                         files=files, eolmode=None, similarity=sim / 100.0)
         except error.PatchError as e:
             if not partial:
                 raise error.Abort(pycompat.bytestr(e))
             if partial:
                 rejects = True
 
         files = list(files)
         if nocommit:
             if message:
                 msgs.append(message)
         else:
             if opts.get('exact') or p2:
                 # If you got here, you either use --force and know what
                 # you are doing or used --exact or a merge patch while
                 # being updated to its first parent.
                 m = None
             else:
                 m = scmutil.matchfiles(repo, files or [])
             editform = mergeeditform(repo[None], 'import.normal')
             if opts.get('exact'):
                 editor = None
             else:
                 editor = getcommiteditor(editform=editform,
                                          **pycompat.strkwargs(opts))
             extra = {}
             for idfunc in extrapreimport:
                 extrapreimportmap[idfunc](repo, patchdata, extra, opts)
             overrides = {}
             if partial:
                 overrides[('ui', 'allowemptycommit')] = True
             with repo.ui.configoverride(overrides, 'import'):
                 n = repo.commit(message, user,
                                 date, match=m,
                                 editor=editor, extra=extra)
                 for idfunc in extrapostimport:
                     extrapostimportmap[idfunc](repo[n])
     else:
         if opts.get('exact') or importbranch:
             branch = branch or 'default'
         else:
             branch = p1.branch()
         store = patch.filestore()
         try:
             files = set()
             try:
                 patch.patchrepo(ui, repo, p1, store, tmpname, strip, prefix,
                                 files, eolmode=None)
             except error.PatchError as e:
                 raise error.Abort(stringutil.forcebytestr(e))
             if opts.get('exact'):
                 editor = None
             else:
                 editor = getcommiteditor(editform='import.bypass')
             memctx = context.memctx(repo, (p1.node(), p2.node()),
                                     message,
                                     files=files,
                                     filectxfn=store,
                                     user=user,
                                     date=date,
                                     branch=branch,
                                     editor=editor)
             n = memctx.commit()
         finally:
             store.close()
     if opts.get('exact') and nocommit:
         # --exact with --no-commit is still useful in that it does merge
         # and branch bits
         ui.warn(_("warning: can't check exact import with --no-commit\n"))
     elif opts.get('exact') and (not n or hex(n) != nodeid):
         raise error.Abort(_('patch is damaged or loses information'))
     msg = _('applied to working directory')
     if n:
         # i18n: refers to a short changeset id
         msg = _('created %s') % short(n)
     return msg, n, rejects
 
 # facility to let extensions include additional data in an exported patch
 # list of identifiers to be executed in order
 extraexport = []
 # mapping from identifier to actual export function
 # function as to return a string to be added to the header or None
 # it is given two arguments (sequencenumber, changectx)
 extraexportmap = {}
 
 def _exportsingle(repo, ctx, fm, match, switch_parent, seqno, diffopts):
     node = scmutil.binnode(ctx)
     parents = [p.node() for p in ctx.parents() if p]
     branch = ctx.branch()
     if switch_parent:
         parents.reverse()
 
     if parents:
         prev = parents[0]
     else:
         prev = nullid
 
     fm.context(ctx=ctx)
     fm.plain('# HG changeset patch\n')
     fm.write('user', '# User %s\n', ctx.user())
     fm.plain('# Date %d %d\n' % ctx.date())
     fm.write('date', '#      %s\n', fm.formatdate(ctx.date()))
     fm.condwrite(branch and branch != 'default',
                  'branch', '# Branch %s\n', branch)
     fm.write('node', '# Node ID %s\n', hex(node))
     fm.plain('# Parent  %s\n' % hex(prev))
     if len(parents) > 1:
         fm.plain('# Parent  %s\n' % hex(parents[1]))
     fm.data(parents=fm.formatlist(pycompat.maplist(hex, parents), name='node'))
 
     # TODO: redesign extraexportmap function to support formatter
     for headerid in extraexport:
         header = extraexportmap[headerid](seqno, ctx)
         if header is not None:
             fm.plain('# %s\n' % header)
 
     fm.write('desc', '%s\n', ctx.description().rstrip())
     fm.plain('\n')
 
     if fm.isplain():
         chunkiter = patch.diffui(repo, prev, node, match, opts=diffopts)
         for chunk, label in chunkiter:
             fm.plain(chunk, label=label)
     else:
         chunkiter = patch.diff(repo, prev, node, match, opts=diffopts)
         # TODO: make it structured?
         fm.data(diff=b''.join(chunkiter))
 
 def _exportfile(repo, revs, fm, dest, switch_parent, diffopts, match):
     """Export changesets to stdout or a single file"""
     for seqno, rev in enumerate(revs, 1):
         ctx = repo[rev]
         if not dest.startswith('<'):
             repo.ui.note("%s\n" % dest)
         fm.startitem()
         _exportsingle(repo, ctx, fm, match, switch_parent, seqno, diffopts)
 
 def _exportfntemplate(repo, revs, basefm, fntemplate, switch_parent, diffopts,
                       match):
     """Export changesets to possibly multiple files"""
     total = len(revs)
     revwidth = max(len(str(rev)) for rev in revs)
     filemap = util.sortdict()  # filename: [(seqno, rev), ...]
 
     for seqno, rev in enumerate(revs, 1):
         ctx = repo[rev]
         dest = makefilename(ctx, fntemplate,
                             total=total, seqno=seqno, revwidth=revwidth)
         filemap.setdefault(dest, []).append((seqno, rev))
 
     for dest in filemap:
         with formatter.maybereopen(basefm, dest) as fm:
             repo.ui.note("%s\n" % dest)
             for seqno, rev in filemap[dest]:
                 fm.startitem()
                 ctx = repo[rev]
                 _exportsingle(repo, ctx, fm, match, switch_parent, seqno,
                               diffopts)
 
 def _prefetchchangedfiles(repo, revs, match):
     allfiles = set()
     for rev in revs:
         for file in repo[rev].files():
             if not match or match(file):
                 allfiles.add(file)
     scmutil.prefetchfiles(repo, revs, scmutil.matchfiles(repo, allfiles))
 
 def export(repo, revs, basefm, fntemplate='hg-%h.patch', switch_parent=False,
            opts=None, match=None):
     '''export changesets as hg patches
 
     Args:
       repo: The repository from which we're exporting revisions.
       revs: A list of revisions to export as revision numbers.
       basefm: A formatter to which patches should be written.
       fntemplate: An optional string to use for generating patch file names.
       switch_parent: If True, show diffs against second parent when not nullid.
                      Default is false, which always shows diff against p1.
       opts: diff options to use for generating the patch.
       match: If specified, only export changes to files matching this matcher.
 
     Returns:
       Nothing.
 
     Side Effect:
       "HG Changeset Patch" data is emitted to one of the following
       destinations:
         fntemplate specified: Each rev is written to a unique file named using
                             the given template.
         Otherwise: All revs will be written to basefm.
     '''
     _prefetchchangedfiles(repo, revs, match)
 
     if not fntemplate:
         _exportfile(repo, revs, basefm, '<unnamed>', switch_parent, opts, match)
     else:
         _exportfntemplate(repo, revs, basefm, fntemplate, switch_parent, opts,
                           match)
 
 def exportfile(repo, revs, fp, switch_parent=False, opts=None, match=None):
     """Export changesets to the given file stream"""
     _prefetchchangedfiles(repo, revs, match)
 
     dest = getattr(fp, 'name', '<unnamed>')
     with formatter.formatter(repo.ui, fp, 'export', {}) as fm:
         _exportfile(repo, revs, fm, dest, switch_parent, opts, match)
 
 def showmarker(fm, marker, index=None):
     """utility function to display obsolescence marker in a readable way
 
     To be used by debug function."""
     if index is not None:
         fm.write('index', '%i ', index)
     fm.write('prednode', '%s ', hex(marker.prednode()))
     succs = marker.succnodes()
     fm.condwrite(succs, 'succnodes', '%s ',
                  fm.formatlist(map(hex, succs), name='node'))
     fm.write('flag', '%X ', marker.flags())
     parents = marker.parentnodes()
     if parents is not None:
         fm.write('parentnodes', '{%s} ',
                  fm.formatlist(map(hex, parents), name='node', sep=', '))
     fm.write('date', '(%s) ', fm.formatdate(marker.date()))
     meta = marker.metadata().copy()
     meta.pop('date', None)
     smeta = pycompat.rapply(pycompat.maybebytestr, meta)
     fm.write('metadata', '{%s}', fm.formatdict(smeta, fmt='%r: %r', sep=', '))
     fm.plain('\n')
 
 def finddate(ui, repo, date):
     """Find the tipmost changeset that matches the given date spec"""
 
     df = dateutil.matchdate(date)
     m = scmutil.matchall(repo)
     results = {}
 
     def prep(ctx, fns):
         d = ctx.date()
         if df(d[0]):
             results[ctx.rev()] = d
 
     for ctx in walkchangerevs(repo, m, {'rev': None}, prep):
         rev = ctx.rev()
         if rev in results:
             ui.status(_("found revision %s from %s\n") %
                       (rev, dateutil.datestr(results[rev])))
             return '%d' % rev
 
     raise error.Abort(_("revision matching date not found"))
 
 def increasingwindows(windowsize=8, sizelimit=512):
     while True:
         yield windowsize
         if windowsize < sizelimit:
             windowsize *= 2
 
 def _walkrevs(repo, opts):
     # Default --rev value depends on --follow but --follow behavior
     # depends on revisions resolved from --rev...
     follow = opts.get('follow') or opts.get('follow_first')
     if opts.get('rev'):
         revs = scmutil.revrange(repo, opts['rev'])
     elif follow and repo.dirstate.p1() == nullid:
         revs = smartset.baseset()
     elif follow:
         revs = repo.revs('reverse(:.)')
     else:
         revs = smartset.spanset(repo)
         revs.reverse()
     return revs
 
 class FileWalkError(Exception):
     pass
 
 def walkfilerevs(repo, match, follow, revs, fncache):
     '''Walks the file history for the matched files.
 
     Returns the changeset revs that are involved in the file history.
 
     Throws FileWalkError if the file history can't be walked using
     filelogs alone.
     '''
     wanted = set()
     copies = []
     minrev, maxrev = min(revs), max(revs)
     def filerevs(filelog, last):
         """
         Only files, no patterns.  Check the history of each file.
 
         Examines filelog entries within minrev, maxrev linkrev range
         Returns an iterator yielding (linkrev, parentlinkrevs, copied)
         tuples in backwards order
         """
         cl_count = len(repo)
         revs = []
         for j in pycompat.xrange(0, last + 1):
             linkrev = filelog.linkrev(j)
             if linkrev < minrev:
                 continue
             # only yield rev for which we have the changelog, it can
             # happen while doing "hg log" during a pull or commit
             if linkrev >= cl_count:
                 break
 
             parentlinkrevs = []
             for p in filelog.parentrevs(j):
                 if p != nullrev:
                     parentlinkrevs.append(filelog.linkrev(p))
             n = filelog.node(j)
             revs.append((linkrev, parentlinkrevs,
                          follow and filelog.renamed(n)))
 
         return reversed(revs)
     def iterfiles():
         pctx = repo['.']
         for filename in match.files():
             if follow:
                 if filename not in pctx:
                     raise error.Abort(_('cannot follow file not in parent '
                                        'revision: "%s"') % filename)
                 yield filename, pctx[filename].filenode()
             else:
                 yield filename, None
         for filename_node in copies:
             yield filename_node
 
     for file_, node in iterfiles():
         filelog = repo.file(file_)
         if not len(filelog):
             if node is None:
                 # A zero count may be a directory or deleted file, so
                 # try to find matching entries on the slow path.
                 if follow:
                     raise error.Abort(
                         _('cannot follow nonexistent file: "%s"') % file_)
                 raise FileWalkError("Cannot walk via filelog")
             else:
                 continue
 
         if node is None:
             last = len(filelog) - 1
         else:
             last = filelog.rev(node)
 
         # keep track of all ancestors of the file
         ancestors = {filelog.linkrev(last)}
 
         # iterate from latest to oldest revision
         for rev, flparentlinkrevs, copied in filerevs(filelog, last):
             if not follow:
                 if rev > maxrev:
                     continue
             else:
                 # Note that last might not be the first interesting
                 # rev to us:
                 # if the file has been changed after maxrev, we'll
                 # have linkrev(last) > maxrev, and we still need
                 # to explore the file graph
                 if rev not in ancestors:
                     continue
                 # XXX insert 1327 fix here
                 if flparentlinkrevs:
                     ancestors.update(flparentlinkrevs)
 
             fncache.setdefault(rev, []).append(file_)
             wanted.add(rev)
             if copied:
                 copies.append(copied)
 
     return wanted
 
 class _followfilter(object):
     def __init__(self, repo, onlyfirst=False):
         self.repo = repo
         self.startrev = nullrev
         self.roots = set()
         self.onlyfirst = onlyfirst
 
     def match(self, rev):
         def realparents(rev):
             if self.onlyfirst:
                 return self.repo.changelog.parentrevs(rev)[0:1]
             else:
                 return filter(lambda x: x != nullrev,
                               self.repo.changelog.parentrevs(rev))
 
         if self.startrev == nullrev:
             self.startrev = rev
             return True
 
         if rev > self.startrev:
             # forward: all descendants
             if not self.roots:
                 self.roots.add(self.startrev)
             for parent in realparents(rev):
                 if parent in self.roots:
                     self.roots.add(rev)
                     return True
         else:
             # backwards: all parents
             if not self.roots:
                 self.roots.update(realparents(self.startrev))
             if rev in self.roots:
                 self.roots.remove(rev)
                 self.roots.update(realparents(rev))
                 return True
 
         return False
 
 def walkchangerevs(repo, match, opts, prepare):
     '''Iterate over files and the revs in which they changed.
 
     Callers most commonly need to iterate backwards over the history
     in which they are interested. Doing so has awful (quadratic-looking)
     performance, so we use iterators in a "windowed" way.
 
     We walk a window of revisions in the desired order.  Within the
     window, we first walk forwards to gather data, then in the desired
     order (usually backwards) to display it.
 
     This function returns an iterator yielding contexts. Before
     yielding each context, the iterator will first call the prepare
     function on each context in the window in forward order.'''
 
     allfiles = opts.get('all_files')
     follow = opts.get('follow') or opts.get('follow_first')
     revs = _walkrevs(repo, opts)
     if not revs:
         return []
     wanted = set()
     slowpath = match.anypats() or (not match.always() and opts.get('removed'))
     fncache = {}
     change = repo.__getitem__
 
     # First step is to fill wanted, the set of revisions that we want to yield.
     # When it does not induce extra cost, we also fill fncache for revisions in
     # wanted: a cache of filenames that were changed (ctx.files()) and that
     # match the file filtering conditions.
 
     if match.always() or allfiles:
         # No files, no patterns.  Display all revs.
         wanted = revs
     elif not slowpath:
         # We only have to read through the filelog to find wanted revisions
 
         try:
             wanted = walkfilerevs(repo, match, follow, revs, fncache)
         except FileWalkError:
             slowpath = True
 
             # We decided to fall back to the slowpath because at least one
             # of the paths was not a file. Check to see if at least one of them
             # existed in history, otherwise simply return
             for path in match.files():
                 if path == '.' or path in repo.store:
                     break
             else:
                 return []
 
     if slowpath:
         # We have to read the changelog to match filenames against
         # changed files
 
         if follow:
             raise error.Abort(_('can only follow copies/renames for explicit '
                                'filenames'))
 
         # The slow path checks files modified in every changeset.
         # This is really slow on large repos, so compute the set lazily.
         class lazywantedset(object):
             def __init__(self):
                 self.set = set()
                 self.revs = set(revs)
 
             # No need to worry about locality here because it will be accessed
             # in the same order as the increasing window below.
             def __contains__(self, value):
                 if value in self.set:
                     return True
                 elif not value in self.revs:
                     return False
                 else:
                     self.revs.discard(value)
                     ctx = change(value)
                     if allfiles:
                         matches = list(ctx.manifest().walk(match))
                     else:
                         matches = [f for f in ctx.files() if match(f)]
                     if matches:
                         fncache[value] = matches
                         self.set.add(value)
                         return True
                     return False
 
             def discard(self, value):
                 self.revs.discard(value)
                 self.set.discard(value)
 
         wanted = lazywantedset()
 
     # it might be worthwhile to do this in the iterator if the rev range
     # is descending and the prune args are all within that range
     for rev in opts.get('prune', ()):
         rev = repo[rev].rev()
         ff = _followfilter(repo)
         stop = min(revs[0], revs[-1])
         for x in pycompat.xrange(rev, stop - 1, -1):
             if ff.match(x):
                 wanted = wanted - [x]
 
     # Now that wanted is correctly initialized, we can iterate over the
     # revision range, yielding only revisions in wanted.
     def iterate():
         if follow and match.always():
             ff = _followfilter(repo, onlyfirst=opts.get('follow_first'))
             def want(rev):
                 return ff.match(rev) and rev in wanted
         else:
             def want(rev):
                 return rev in wanted
 
         it = iter(revs)
         stopiteration = False
         for windowsize in increasingwindows():
             nrevs = []
             for i in pycompat.xrange(windowsize):
                 rev = next(it, None)
                 if rev is None:
                     stopiteration = True
                     break
                 elif want(rev):
                     nrevs.append(rev)
             for rev in sorted(nrevs):
                 fns = fncache.get(rev)
                 ctx = change(rev)
                 if not fns:
                     def fns_generator():
                         if allfiles:
                             fiter = iter(ctx)
                         else:
                             fiter = ctx.files()
                         for f in fiter:
                             if match(f):
                                 yield f
                     fns = fns_generator()
                 prepare(ctx, fns)
             for rev in nrevs:
                 yield change(rev)
 
             if stopiteration:
                 break
 
     return iterate()
 
 def add(ui, repo, match, prefix, uipathfn, explicitonly, **opts):
     bad = []
 
     badfn = lambda x, y: bad.append(x) or match.bad(x, y)
     names = []
     wctx = repo[None]
     cca = None
     abort, warn = scmutil.checkportabilityalert(ui)
     if abort or warn:
         cca = scmutil.casecollisionauditor(ui, abort, repo.dirstate)
 
     match = repo.narrowmatch(match, includeexact=True)
     badmatch = matchmod.badmatch(match, badfn)
     dirstate = repo.dirstate
     # We don't want to just call wctx.walk here, since it would return a lot of
     # clean files, which we aren't interested in and takes time.
     for f in sorted(dirstate.walk(badmatch, subrepos=sorted(wctx.substate),
                                   unknown=True, ignored=False, full=False)):
         exact = match.exact(f)
         if exact or not explicitonly and f not in wctx and repo.wvfs.lexists(f):
             if cca:
                 cca(f)
             names.append(f)
             if ui.verbose or not exact:
                 ui.status(_('adding %s\n') % uipathfn(f),
                           label='ui.addremove.added')
 
     for subpath in sorted(wctx.substate):
         sub = wctx.sub(subpath)
         try:
             submatch = matchmod.subdirmatcher(subpath, match)
             subprefix = repo.wvfs.reljoin(prefix, subpath)
             subuipathfn = scmutil.subdiruipathfn(subpath, uipathfn)
             if opts.get(r'subrepos'):
                 bad.extend(sub.add(ui, submatch, subprefix, subuipathfn, False,
                                    **opts))
             else:
                 bad.extend(sub.add(ui, submatch, subprefix, subuipathfn, True,
                                    **opts))
         except error.LookupError:
             ui.status(_("skipping missing subrepository: %s\n")
                            % uipathfn(subpath))
 
     if not opts.get(r'dry_run'):
         rejected = wctx.add(names, prefix)
         bad.extend(f for f in rejected if f in match.files())
     return bad
 
 def addwebdirpath(repo, serverpath, webconf):
     webconf[serverpath] = repo.root
     repo.ui.debug('adding %s = %s\n' % (serverpath, repo.root))
 
     for r in repo.revs('filelog("path:.hgsub")'):
         ctx = repo[r]
         for subpath in ctx.substate:
             ctx.sub(subpath).addwebdirpath(serverpath, webconf)
 
 def forget(ui, repo, match, prefix, uipathfn, explicitonly, dryrun,
            interactive):
     if dryrun and interactive:
         raise error.Abort(_("cannot specify both --dry-run and --interactive"))
     bad = []
     badfn = lambda x, y: bad.append(x) or match.bad(x, y)
     wctx = repo[None]
     forgot = []
 
     s = repo.status(match=matchmod.badmatch(match, badfn), clean=True)
     forget = sorted(s.modified + s.added + s.deleted + s.clean)
     if explicitonly:
         forget = [f for f in forget if match.exact(f)]
 
     for subpath in sorted(wctx.substate):
         sub = wctx.sub(subpath)
         submatch = matchmod.subdirmatcher(subpath, match)
         subprefix = repo.wvfs.reljoin(prefix, subpath)
         subuipathfn = scmutil.subdiruipathfn(subpath, uipathfn)
         try:
             subbad, subforgot = sub.forget(submatch, subprefix, subuipathfn,
                                            dryrun=dryrun,
                                            interactive=interactive)
             bad.extend([subpath + '/' + f for f in subbad])
             forgot.extend([subpath + '/' + f for f in subforgot])
         except error.LookupError:
             ui.status(_("skipping missing subrepository: %s\n")
                            % uipathfn(subpath))
 
     if not explicitonly:
         for f in match.files():
             if f not in repo.dirstate and not repo.wvfs.isdir(f):
                 if f not in forgot:
                     if repo.wvfs.exists(f):
                         # Don't complain if the exact case match wasn't given.
                         # But don't do this until after checking 'forgot', so
                         # that subrepo files aren't normalized, and this op is
                         # purely from data cached by the status walk above.
                         if repo.dirstate.normalize(f) in repo.dirstate:
                             continue
                         ui.warn(_('not removing %s: '
                                   'file is already untracked\n')
                                 % uipathfn(f))
                     bad.append(f)
 
     if interactive:
         responses = _('[Ynsa?]'
                       '$$ &Yes, forget this file'
                       '$$ &No, skip this file'
                       '$$ &Skip remaining files'
                       '$$ Include &all remaining files'
                       '$$ &? (display help)')
         for filename in forget[:]:
             r = ui.promptchoice(_('forget %s %s') %
                                 (uipathfn(filename), responses))
             if r == 4: # ?
                 while r == 4:
                     for c, t in ui.extractchoices(responses)[1]:
                         ui.write('%s - %s\n' % (c, encoding.lower(t)))
                     r = ui.promptchoice(_('forget %s %s') %
                                         (uipathfn(filename), responses))
             if r == 0: # yes
                 continue
             elif r == 1: # no
                 forget.remove(filename)
             elif r == 2: # Skip
                 fnindex = forget.index(filename)
                 del forget[fnindex:]
                 break
             elif r == 3: # All
                 break
 
     for f in forget:
         if ui.verbose or not match.exact(f) or interactive:
             ui.status(_('removing %s\n') % uipathfn(f),
                       label='ui.addremove.removed')
 
     if not dryrun:
         rejected = wctx.forget(forget, prefix)
         bad.extend(f for f in rejected if f in match.files())
         forgot.extend(f for f in forget if f not in rejected)
     return bad, forgot
 
 def files(ui, ctx, m, uipathfn, fm, fmt, subrepos):
     ret = 1
 
     needsfctx = ui.verbose or {'size', 'flags'} & fm.datahint()
     for f in ctx.matches(m):
         fm.startitem()
         fm.context(ctx=ctx)
         if needsfctx:
             fc = ctx[f]
             fm.write('size flags', '% 10d % 1s ', fc.size(), fc.flags())
         fm.data(path=f)
         fm.plain(fmt % uipathfn(f))
         ret = 0
 
     for subpath in sorted(ctx.substate):
         submatch = matchmod.subdirmatcher(subpath, m)
         subuipathfn = scmutil.subdiruipathfn(subpath, uipathfn)
         if (subrepos or m.exact(subpath) or any(submatch.files())):
             sub = ctx.sub(subpath)
             try:
                 recurse = m.exact(subpath) or subrepos
                 if sub.printfiles(ui, submatch, subuipathfn, fm, fmt,
                                   recurse) == 0:
                     ret = 0
             except error.LookupError:
                 ui.status(_("skipping missing subrepository: %s\n")
                                % uipathfn(subpath))
 
     return ret
 
 def remove(ui, repo, m, prefix, uipathfn, after, force, subrepos, dryrun,
            warnings=None):
     ret = 0
     s = repo.status(match=m, clean=True)
     modified, added, deleted, clean = s[0], s[1], s[3], s[6]
 
     wctx = repo[None]
 
     if warnings is None:
         warnings = []
         warn = True
     else:
         warn = False
 
     subs = sorted(wctx.substate)
     progress = ui.makeprogress(_('searching'), total=len(subs),
                                unit=_('subrepos'))
     for subpath in subs:
         submatch = matchmod.subdirmatcher(subpath, m)
         subprefix = repo.wvfs.reljoin(prefix, subpath)
         subuipathfn = scmutil.subdiruipathfn(subpath, uipathfn)
         if subrepos or m.exact(subpath) or any(submatch.files()):
             progress.increment()
             sub = wctx.sub(subpath)
             try:
                 if sub.removefiles(submatch, subprefix, subuipathfn, after,
                                    force, subrepos, dryrun, warnings):
                     ret = 1
             except error.LookupError:
                 warnings.append(_("skipping missing subrepository: %s\n")
                                % uipathfn(subpath))
     progress.complete()
 
     # warn about failure to delete explicit files/dirs
     deleteddirs = util.dirs(deleted)
     files = m.files()
     progress = ui.makeprogress(_('deleting'), total=len(files),
                                unit=_('files'))
     for f in files:
         def insubrepo():
             for subpath in wctx.substate:
                 if f.startswith(subpath + '/'):
                     return True
             return False
 
         progress.increment()
         isdir = f in deleteddirs or wctx.hasdir(f)
         if (f in repo.dirstate or isdir or f == '.'
             or insubrepo() or f in subs):
             continue
 
         if repo.wvfs.exists(f):
             if repo.wvfs.isdir(f):
                 warnings.append(_('not removing %s: no tracked files\n')
                         % uipathfn(f))
             else:
                 warnings.append(_('not removing %s: file is untracked\n')
                         % uipathfn(f))
         # missing files will generate a warning elsewhere
         ret = 1
     progress.complete()
 
     if force:
         list = modified + deleted + clean + added
     elif after:
         list = deleted
         remaining = modified + added + clean
         progress = ui.makeprogress(_('skipping'), total=len(remaining),
                                    unit=_('files'))
         for f in remaining:
             progress.increment()
             if ui.verbose or (f in files):
                 warnings.append(_('not removing %s: file still exists\n')
                                 % uipathfn(f))
             ret = 1
         progress.complete()
     else:
         list = deleted + clean
         progress = ui.makeprogress(_('skipping'),
                                    total=(len(modified) + len(added)),
                                    unit=_('files'))
         for f in modified:
             progress.increment()
             warnings.append(_('not removing %s: file is modified (use -f'
                       ' to force removal)\n') % uipathfn(f))
             ret = 1
         for f in added:
             progress.increment()
             warnings.append(_("not removing %s: file has been marked for add"
                       " (use 'hg forget' to undo add)\n") % uipathfn(f))
             ret = 1
         progress.complete()
 
     list = sorted(list)
     progress = ui.makeprogress(_('deleting'), total=len(list),
                                unit=_('files'))
     for f in list:
         if ui.verbose or not m.exact(f):
             progress.increment()
             ui.status(_('removing %s\n') % uipathfn(f),
                       label='ui.addremove.removed')
     progress.complete()
 
     if not dryrun:
         with repo.wlock():
             if not after:
                 for f in list:
                     if f in added:
                         continue # we never unlink added files on remove
                     rmdir = repo.ui.configbool('experimental',
                                                'removeemptydirs')
                     repo.wvfs.unlinkpath(f, ignoremissing=True, rmdir=rmdir)
             repo[None].forget(list)
 
     if warn:
         for warning in warnings:
             ui.warn(warning)
 
     return ret
 
 def _catfmtneedsdata(fm):
     return not fm.datahint() or 'data' in fm.datahint()
 
 def _updatecatformatter(fm, ctx, matcher, path, decode):
     """Hook for adding data to the formatter used by ``hg cat``.
 
     Extensions (e.g., lfs) can wrap this to inject keywords/data, but must call
     this method first."""
 
     # data() can be expensive to fetch (e.g. lfs), so don't fetch it if it
     # wasn't requested.
     data = b''
     if _catfmtneedsdata(fm):
         data = ctx[path].data()
         if decode:
             data = ctx.repo().wwritedata(path, data)
     fm.startitem()
     fm.context(ctx=ctx)
     fm.write('data', '%s', data)
     fm.data(path=path)
 
 def cat(ui, repo, ctx, matcher, basefm, fntemplate, prefix, **opts):
     err = 1
     opts = pycompat.byteskwargs(opts)
 
     def write(path):
         filename = None
         if fntemplate:
             filename = makefilename(ctx, fntemplate,
                                     pathname=os.path.join(prefix, path))
             # attempt to create the directory if it does not already exist
             try:
                 os.makedirs(os.path.dirname(filename))
             except OSError:
                 pass
         with formatter.maybereopen(basefm, filename) as fm:
             _updatecatformatter(fm, ctx, matcher, path, opts.get('decode'))
 
     # Automation often uses hg cat on single files, so special case it
     # for performance to avoid the cost of parsing the manifest.
     if len(matcher.files()) == 1 and not matcher.anypats():
         file = matcher.files()[0]
         mfl = repo.manifestlog
         mfnode = ctx.manifestnode()
         try:
             if mfnode and mfl[mfnode].find(file)[0]:
                 if _catfmtneedsdata(basefm):
                     scmutil.prefetchfiles(repo, [ctx.rev()], matcher)
                 write(file)
                 return 0
         except KeyError:
             pass
 
     if _catfmtneedsdata(basefm):
         scmutil.prefetchfiles(repo, [ctx.rev()], matcher)
 
     for abs in ctx.walk(matcher):
         write(abs)
         err = 0
 
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     for subpath in sorted(ctx.substate):
         sub = ctx.sub(subpath)
         try:
             submatch = matchmod.subdirmatcher(subpath, matcher)
             subprefix = os.path.join(prefix, subpath)
             if not sub.cat(submatch, basefm, fntemplate, subprefix,
                            **pycompat.strkwargs(opts)):
                 err = 0
         except error.RepoLookupError:
             ui.status(_("skipping missing subrepository: %s\n") %
                       uipathfn(subpath))
 
     return err
 
 def commit(ui, repo, commitfunc, pats, opts):
     '''commit the specified files or all outstanding changes'''
     date = opts.get('date')
     if date:
         opts['date'] = dateutil.parsedate(date)
     message = logmessage(ui, opts)
     matcher = scmutil.match(repo[None], pats, opts)
 
     dsguard = None
     # extract addremove carefully -- this function can be called from a command
     # that doesn't support addremove
     if opts.get('addremove'):
         dsguard = dirstateguard.dirstateguard(repo, 'commit')
     with dsguard or util.nullcontextmanager():
         if dsguard:
             relative = scmutil.anypats(pats, opts)
             uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=relative)
             if scmutil.addremove(repo, matcher, "", uipathfn, opts) != 0:
                 raise error.Abort(
                     _("failed to mark all new/missing files as added/removed"))
 
         return commitfunc(ui, repo, message, matcher, opts)
 
 def samefile(f, ctx1, ctx2):
     if f in ctx1.manifest():
         a = ctx1.filectx(f)
         if f in ctx2.manifest():
             b = ctx2.filectx(f)
             return (not a.cmp(b)
                     and a.flags() == b.flags())
         else:
             return False
     else:
         return f not in ctx2.manifest()
 
 def amend(ui, repo, old, extra, pats, opts):
     # avoid cycle context -> subrepo -> cmdutil
     from . import context
 
     # amend will reuse the existing user if not specified, but the obsolete
     # marker creation requires that the current user's name is specified.
     if obsolete.isenabled(repo, obsolete.createmarkersopt):
         ui.username() # raise exception if username not set
 
     ui.note(_('amending changeset %s\n') % old)
     base = old.p1()
 
     with repo.wlock(), repo.lock(), repo.transaction('amend'):
         # Participating changesets:
         #
         # wctx     o - workingctx that contains changes from working copy
         #          |   to go into amending commit
         #          |
         # old      o - changeset to amend
         #          |
         # base     o - first parent of the changeset to amend
         wctx = repo[None]
 
         # Copy to avoid mutating input
         extra = extra.copy()
         # Update extra dict from amended commit (e.g. to preserve graft
         # source)
         extra.update(old.extra())
 
         # Also update it from the from the wctx
         extra.update(wctx.extra())
 
         user = opts.get('user') or old.user()
 
         datemaydiffer = False  # date-only change should be ignored?
         if opts.get('date') and opts.get('currentdate'):
             raise error.Abort(_('--date and --currentdate are mutually '
                                 'exclusive'))
         if opts.get('date'):
             date = dateutil.parsedate(opts.get('date'))
         elif opts.get('currentdate'):
             date = dateutil.makedate()
         elif (ui.configbool('rewrite', 'update-timestamp')
               and opts.get('currentdate') is None):
             date = dateutil.makedate()
             datemaydiffer = True
         else:
             date = old.date()
 
         if len(old.parents()) > 1:
             # ctx.files() isn't reliable for merges, so fall back to the
             # slower repo.status() method
             files = {fn for st in base.status(old)[:3] for fn in st}
         else:
             files = set(old.files())
 
         # add/remove the files to the working copy if the "addremove" option
         # was specified.
         matcher = scmutil.match(wctx, pats, opts)
         relative = scmutil.anypats(pats, opts)
         uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=relative)
         if (opts.get('addremove')
             and scmutil.addremove(repo, matcher, "", uipathfn, opts)):
             raise error.Abort(
                 _("failed to mark all new/missing files as added/removed"))
 
         # Check subrepos. This depends on in-place wctx._status update in
         # subrepo.precommit(). To minimize the risk of this hack, we do
         # nothing if .hgsub does not exist.
         if '.hgsub' in wctx or '.hgsub' in old:
             subs, commitsubs, newsubstate = subrepoutil.precommit(
                 ui, wctx, wctx._status, matcher)
             # amend should abort if commitsubrepos is enabled
             assert not commitsubs
             if subs:
                 subrepoutil.writestate(repo, newsubstate)
 
         ms = mergemod.mergestate.read(repo)
         mergeutil.checkunresolved(ms)
 
         filestoamend = set(f for f in wctx.files() if matcher(f))
 
         changes = (len(filestoamend) > 0)
         if changes:
             # Recompute copies (avoid recording a -> b -> a)
             copied = copies.pathcopies(base, wctx, matcher)
             if old.p2:
                 copied.update(copies.pathcopies(old.p2(), wctx, matcher))
 
             # Prune files which were reverted by the updates: if old
             # introduced file X and the file was renamed in the working
             # copy, then those two files are the same and
             # we can discard X from our list of files. Likewise if X
             # was removed, it's no longer relevant. If X is missing (aka
             # deleted), old X must be preserved.
             files.update(filestoamend)
             files = [f for f in files if (not samefile(f, wctx, base)
                                           or f in wctx.deleted())]
 
             def filectxfn(repo, ctx_, path):
                 try:
                     # If the file being considered is not amongst the files
                     # to be amended, we should return the file context from the
                     # old changeset. This avoids issues when only some files in
                     # the working copy are being amended but there are also
                     # changes to other files from the old changeset.
                     if path not in filestoamend:
                         return old.filectx(path)
 
                     # Return None for removed files.
                     if path in wctx.removed():
                         return None
 
                     fctx = wctx[path]
                     flags = fctx.flags()
                     mctx = context.memfilectx(repo, ctx_,
                                               fctx.path(), fctx.data(),
                                               islink='l' in flags,
                                               isexec='x' in flags,
                                               copysource=copied.get(path))
                     return mctx
                 except KeyError:
                     return None
         else:
             ui.note(_('copying changeset %s to %s\n') % (old, base))
 
             # Use version of files as in the old cset
             def filectxfn(repo, ctx_, path):
                 try:
                     return old.filectx(path)
                 except KeyError:
                     return None
 
         # See if we got a message from -m or -l, if not, open the editor with
         # the message of the changeset to amend.
         message = logmessage(ui, opts)
 
         editform = mergeeditform(old, 'commit.amend')
 
         if not message:
             message = old.description()
             # Default if message isn't provided and --edit is not passed is to
             # invoke editor, but allow --no-edit. If somehow we don't have any
             # description, let's always start the editor.
             doedit = not message or opts.get('edit') in [True, None]
         else:
             # Default if message is provided is to not invoke editor, but allow
             # --edit.
             doedit = opts.get('edit') is True
         editor = getcommiteditor(edit=doedit, editform=editform)
 
         pureextra = extra.copy()
         extra['amend_source'] = old.hex()
 
         new = context.memctx(repo,
                              parents=[base.node(), old.p2().node()],
                              text=message,
                              files=files,
                              filectxfn=filectxfn,
                              user=user,
                              date=date,
                              extra=extra,
                              editor=editor)
 
         newdesc = changelog.stripdesc(new.description())
         if ((not changes)
             and newdesc == old.description()
             and user == old.user()
             and (date == old.date() or datemaydiffer)
             and pureextra == old.extra()):
             # nothing changed. continuing here would create a new node
             # anyway because of the amend_source noise.
             #
             # This not what we expect from amend.
             return old.node()
 
         commitphase = None
         if opts.get('secret'):
             commitphase = phases.secret
         newid = repo.commitctx(new)
 
         # Reroute the working copy parent to the new changeset
         repo.setparents(newid, nullid)
         mapping = {old.node(): (newid,)}
         obsmetadata = None
         if opts.get('note'):
             obsmetadata = {'note': encoding.fromlocal(opts['note'])}
         backup = ui.configbool('rewrite', 'backup-bundle')
         scmutil.cleanupnodes(repo, mapping, 'amend', metadata=obsmetadata,
                              fixphase=True, targetphase=commitphase,
                              backup=backup)
 
         # Fixing the dirstate because localrepo.commitctx does not update
         # it. This is rather convenient because we did not need to update
         # the dirstate for all the files in the new commit which commitctx
         # could have done if it updated the dirstate. Now, we can
         # selectively update the dirstate only for the amended files.
         dirstate = repo.dirstate
 
         # Update the state of the files which were added and
         # and modified in the amend to "normal" in the dirstate.
         normalfiles = set(wctx.modified() + wctx.added()) & filestoamend
         for f in normalfiles:
             dirstate.normal(f)
 
         # Update the state of files which were removed in the amend
         # to "removed" in the dirstate.
         removedfiles = set(wctx.removed()) & filestoamend
         for f in removedfiles:
             dirstate.drop(f)
 
     return newid
 
 def commiteditor(repo, ctx, subs, editform=''):
     if ctx.description():
         return ctx.description()
     return commitforceeditor(repo, ctx, subs, editform=editform,
                              unchangedmessagedetection=True)
 
 def commitforceeditor(repo, ctx, subs, finishdesc=None, extramsg=None,
                       editform='', unchangedmessagedetection=False):
     if not extramsg:
         extramsg = _("Leave message empty to abort commit.")
 
     forms = [e for e in editform.split('.') if e]
     forms.insert(0, 'changeset')
     templatetext = None
     while forms:
         ref = '.'.join(forms)
         if repo.ui.config('committemplate', ref):
             templatetext = committext = buildcommittemplate(
                 repo, ctx, subs, extramsg, ref)
             break
         forms.pop()
     else:
         committext = buildcommittext(repo, ctx, subs, extramsg)
 
     # run editor in the repository root
     olddir = encoding.getcwd()
     os.chdir(repo.root)
 
     # make in-memory changes visible to external process
     tr = repo.currenttransaction()
     repo.dirstate.write(tr)
     pending = tr and tr.writepending() and repo.root
 
     editortext = repo.ui.edit(committext, ctx.user(), ctx.extra(),
                               editform=editform, pending=pending,
                               repopath=repo.path, action='commit')
     text = editortext
 
     # strip away anything below this special string (used for editors that want
     # to display the diff)
     stripbelow = re.search(_linebelow, text, flags=re.MULTILINE)
     if stripbelow:
         text = text[:stripbelow.start()]
 
     text = re.sub("(?m)^HG:.*(\n|$)", "", text)
     os.chdir(olddir)
 
     if finishdesc:
         text = finishdesc(text)
     if not text.strip():
         raise error.Abort(_("empty commit message"))
     if unchangedmessagedetection and editortext == templatetext:
         raise error.Abort(_("commit message unchanged"))
 
     return text
 
 def buildcommittemplate(repo, ctx, subs, extramsg, ref):
     ui = repo.ui
     spec = formatter.templatespec(ref, None, None)
     t = logcmdutil.changesettemplater(ui, repo, spec)
     t.t.cache.update((k, templater.unquotestring(v))
                      for k, v in repo.ui.configitems('committemplate'))
 
     if not extramsg:
         extramsg = '' # ensure that extramsg is string
 
     ui.pushbuffer()
     t.show(ctx, extramsg=extramsg)
     return ui.popbuffer()
 
 def hgprefix(msg):
     return "\n".join(["HG: %s" % a for a in msg.split("\n") if a])
 
 def buildcommittext(repo, ctx, subs, extramsg):
     edittext = []
     modified, added, removed = ctx.modified(), ctx.added(), ctx.removed()
     if ctx.description():
         edittext.append(ctx.description())
     edittext.append("")
     edittext.append("") # Empty line between message and comments.
     edittext.append(hgprefix(_("Enter commit message."
                       "  Lines beginning with 'HG:' are removed.")))
     edittext.append(hgprefix(extramsg))
     edittext.append("HG: --")
     edittext.append(hgprefix(_("user: %s") % ctx.user()))
     if ctx.p2():
         edittext.append(hgprefix(_("branch merge")))
     if ctx.branch():
         edittext.append(hgprefix(_("branch '%s'") % ctx.branch()))
     if bookmarks.isactivewdirparent(repo):
         edittext.append(hgprefix(_("bookmark '%s'") % repo._activebookmark))
     edittext.extend([hgprefix(_("subrepo %s") % s) for s in subs])
     edittext.extend([hgprefix(_("added %s") % f) for f in added])
     edittext.extend([hgprefix(_("changed %s") % f) for f in modified])
     edittext.extend([hgprefix(_("removed %s") % f) for f in removed])
     if not added and not modified and not removed:
         edittext.append(hgprefix(_("no files changed")))
     edittext.append("")
 
     return "\n".join(edittext)
 
 def commitstatus(repo, node, branch, bheads=None, opts=None):
     if opts is None:
         opts = {}
     ctx = repo[node]
     parents = ctx.parents()
 
     if (not opts.get('amend') and bheads and node not in bheads and not
         [x for x in parents if x.node() in bheads and x.branch() == branch]):
         repo.ui.status(_('created new head\n'))
         # The message is not printed for initial roots. For the other
         # changesets, it is printed in the following situations:
         #
         # Par column: for the 2 parents with ...
         #   N: null or no parent
         #   B: parent is on another named branch
         #   C: parent is a regular non head changeset
         #   H: parent was a branch head of the current branch
         # Msg column: whether we print "created new head" message
         # In the following, it is assumed that there already exists some
         # initial branch heads of the current branch, otherwise nothing is
         # printed anyway.
         #
         # Par Msg Comment
         # N N  y  additional topo root
         #
         # B N  y  additional branch root
         # C N  y  additional topo head
         # H N  n  usual case
         #
         # B B  y  weird additional branch root
         # C B  y  branch merge
         # H B  n  merge with named branch
         #
         # C C  y  additional head from merge
         # C H  n  merge with a head
         #
         # H H  n  head merge: head count decreases
 
     if not opts.get('close_branch'):
         for r in parents:
             if r.closesbranch() and r.branch() == branch:
                 repo.ui.status(_('reopening closed branch head %d\n') % r.rev())
 
     if repo.ui.debugflag:
         repo.ui.write(_('committed changeset %d:%s\n') % (ctx.rev(), ctx.hex()))
     elif repo.ui.verbose:
         repo.ui.write(_('committed changeset %d:%s\n') % (ctx.rev(), ctx))
 
 def postcommitstatus(repo, pats, opts):
     return repo.status(match=scmutil.match(repo[None], pats, opts))
 
 def revert(ui, repo, ctx, parents, *pats, **opts):
     opts = pycompat.byteskwargs(opts)
     parent, p2 = parents
     node = ctx.node()
 
     mf = ctx.manifest()
     if node == p2:
         parent = p2
 
     # need all matching names in dirstate and manifest of target rev,
     # so have to walk both. do not print errors if files exist in one
     # but not other. in both cases, filesets should be evaluated against
     # workingctx to get consistent result (issue4497). this means 'set:**'
     # cannot be used to select missing files from target rev.
 
     # `names` is a mapping for all elements in working copy and target revision
     # The mapping is in the form:
     #   <abs path in repo> -> (<path from CWD>, <exactly specified by matcher?>)
     names = {}
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
 
     with repo.wlock():
         ## filling of the `names` mapping
         # walk dirstate to fill `names`
 
         interactive = opts.get('interactive', False)
         wctx = repo[None]
         m = scmutil.match(wctx, pats, opts)
 
         # we'll need this later
         targetsubs = sorted(s for s in wctx.substate if m(s))
 
         if not m.always():
             matcher = matchmod.badmatch(m, lambda x, y: False)
             for abs in wctx.walk(matcher):
                 names[abs] = m.exact(abs)
 
             # walk target manifest to fill `names`
 
             def badfn(path, msg):
                 if path in names:
                     return
                 if path in ctx.substate:
                     return
                 path_ = path + '/'
                 for f in names:
                     if f.startswith(path_):
                         return
                 ui.warn("%s: %s\n" % (uipathfn(path), msg))
 
             for abs in ctx.walk(matchmod.badmatch(m, badfn)):
                 if abs not in names:
                     names[abs] = m.exact(abs)
 
             # Find status of all file in `names`.
             m = scmutil.matchfiles(repo, names)
 
             changes = repo.status(node1=node, match=m,
                                   unknown=True, ignored=True, clean=True)
         else:
             changes = repo.status(node1=node, match=m)
             for kind in changes:
                 for abs in kind:
                     names[abs] = m.exact(abs)
 
             m = scmutil.matchfiles(repo, names)
 
         modified = set(changes.modified)
         added    = set(changes.added)
         removed  = set(changes.removed)
         _deleted = set(changes.deleted)
         unknown  = set(changes.unknown)
         unknown.update(changes.ignored)
         clean    = set(changes.clean)
         modadded = set()
 
         # We need to account for the state of the file in the dirstate,
         # even when we revert against something else than parent. This will
         # slightly alter the behavior of revert (doing back up or not, delete
         # or just forget etc).
         if parent == node:
             dsmodified = modified
             dsadded = added
             dsremoved = removed
             # store all local modifications, useful later for rename detection
             localchanges = dsmodified | dsadded
             modified, added, removed = set(), set(), set()
         else:
             changes = repo.status(node1=parent, match=m)
             dsmodified = set(changes.modified)
             dsadded    = set(changes.added)
             dsremoved  = set(changes.removed)
             # store all local modifications, useful later for rename detection
             localchanges = dsmodified | dsadded
 
             # only take into account for removes between wc and target
             clean |= dsremoved - removed
             dsremoved &= removed
             # distinct between dirstate remove and other
             removed -= dsremoved
 
             modadded = added & dsmodified
             added -= modadded
 
             # tell newly modified apart.
             dsmodified &= modified
             dsmodified |= modified & dsadded # dirstate added may need backup
             modified -= dsmodified
 
             # We need to wait for some post-processing to update this set
             # before making the distinction. The dirstate will be used for
             # that purpose.
             dsadded = added
 
         # in case of merge, files that are actually added can be reported as
         # modified, we need to post process the result
         if p2 != nullid:
             mergeadd = set(dsmodified)
             for path in dsmodified:
                 if path in mf:
                     mergeadd.remove(path)
             dsadded |= mergeadd
             dsmodified -= mergeadd
 
         # if f is a rename, update `names` to also revert the source
         for f in localchanges:
             src = repo.dirstate.copied(f)
             # XXX should we check for rename down to target node?
             if src and src not in names and repo.dirstate[src] == 'r':
                 dsremoved.add(src)
                 names[src] = True
 
         # determine the exact nature of the deleted changesets
         deladded = set(_deleted)
         for path in _deleted:
             if path in mf:
                 deladded.remove(path)
         deleted = _deleted - deladded
 
         # distinguish between file to forget and the other
         added = set()
         for abs in dsadded:
             if repo.dirstate[abs] != 'a':
                 added.add(abs)
         dsadded -= added
 
         for abs in deladded:
             if repo.dirstate[abs] == 'a':
                 dsadded.add(abs)
         deladded -= dsadded
 
         # For files marked as removed, we check if an unknown file is present at
         # the same path. If a such file exists it may need to be backed up.
         # Making the distinction at this stage helps have simpler backup
         # logic.
         removunk = set()
         for abs in removed:
             target = repo.wjoin(abs)
             if os.path.lexists(target):
                 removunk.add(abs)
         removed -= removunk
 
         dsremovunk = set()
         for abs in dsremoved:
             target = repo.wjoin(abs)
             if os.path.lexists(target):
                 dsremovunk.add(abs)
         dsremoved -= dsremovunk
 
         # action to be actually performed by revert
         # (<list of file>, message>) tuple
         actions = {'revert': ([], _('reverting %s\n')),
                    'add': ([], _('adding %s\n')),
                    'remove': ([], _('removing %s\n')),
                    'drop': ([], _('removing %s\n')),
                    'forget': ([], _('forgetting %s\n')),
                    'undelete': ([], _('undeleting %s\n')),
                    'noop': (None, _('no changes needed to %s\n')),
                    'unknown': (None, _('file not managed: %s\n')),
                   }
 
         # "constant" that convey the backup strategy.
         # All set to `discard` if `no-backup` is set do avoid checking
         # no_backup lower in the code.
         # These values are ordered for comparison purposes
         backupinteractive = 3 # do backup if interactively modified
         backup = 2  # unconditionally do backup
         check = 1   # check if the existing file differs from target
         discard = 0 # never do backup
         if opts.get('no_backup'):
             backupinteractive = backup = check = discard
         if interactive:
             dsmodifiedbackup = backupinteractive
         else:
             dsmodifiedbackup = backup
         tobackup = set()
 
         backupanddel = actions['remove']
         if not opts.get('no_backup'):
             backupanddel = actions['drop']
 
         disptable = (
             # dispatch table:
             #   file state
             #   action
             #   make backup
 
             ## Sets that results that will change file on disk
             # Modified compared to target, no local change
             (modified,      actions['revert'],   discard),
             # Modified compared to target, but local file is deleted
             (deleted,       actions['revert'],   discard),
             # Modified compared to target, local change
             (dsmodified,    actions['revert'],   dsmodifiedbackup),
             # Added since target
             (added,         actions['remove'],   discard),
             # Added in working directory
             (dsadded,       actions['forget'],   discard),
             # Added since target, have local modification
             (modadded,      backupanddel,        backup),
             # Added since target but file is missing in working directory
             (deladded,      actions['drop'],   discard),
             # Removed since  target, before working copy parent
             (removed,       actions['add'],      discard),
             # Same as `removed` but an unknown file exists at the same path
             (removunk,      actions['add'],      check),
             # Removed since targe, marked as such in working copy parent
             (dsremoved,     actions['undelete'], discard),
             # Same as `dsremoved` but an unknown file exists at the same path
             (dsremovunk,    actions['undelete'], check),
             ## the following sets does not result in any file changes
             # File with no modification
             (clean,         actions['noop'],     discard),
             # Existing file, not tracked anywhere
             (unknown,       actions['unknown'],  discard),
             )
 
         for abs, exact in sorted(names.items()):
             # target file to be touch on disk (relative to cwd)
             target = repo.wjoin(abs)
             # search the entry in the dispatch table.
             # if the file is in any of these sets, it was touched in the working
             # directory parent and we are sure it needs to be reverted.
             for table, (xlist, msg), dobackup in disptable:
                 if abs not in table:
                     continue
                 if xlist is not None:
                     xlist.append(abs)
                     if dobackup:
                         # If in interactive mode, don't automatically create
                         # .orig files (issue4793)
                         if dobackup == backupinteractive:
                             tobackup.add(abs)
                         elif (backup <= dobackup or wctx[abs].cmp(ctx[abs])):
                             absbakname = scmutil.backuppath(ui, repo, abs)
                             bakname = os.path.relpath(absbakname,
                                                       start=repo.root)
                             ui.note(_('saving current version of %s as %s\n') %
                                     (uipathfn(abs), uipathfn(bakname)))
                             if not opts.get('dry_run'):
                                 if interactive:
                                     util.copyfile(target, absbakname)
                                 else:
                                     util.rename(target, absbakname)
                     if opts.get('dry_run'):
                         if ui.verbose or not exact:
                             ui.status(msg % uipathfn(abs))
                 elif exact:
                     ui.warn(msg % uipathfn(abs))
                 break
 
         if not opts.get('dry_run'):
             needdata = ('revert', 'add', 'undelete')
             oplist = [actions[name][0] for name in needdata]
             prefetch = scmutil.prefetchfiles
             matchfiles = scmutil.matchfiles
             prefetch(repo, [ctx.rev()],
                      matchfiles(repo,
                                 [f for sublist in oplist for f in sublist]))
             match = scmutil.match(repo[None], pats)
             _performrevert(repo, parents, ctx, names, uipathfn, actions,
                            match, interactive, tobackup)
 
         if targetsubs:
             # Revert the subrepos on the revert list
             for sub in targetsubs:
                 try:
                     wctx.sub(sub).revert(ctx.substate[sub], *pats,
                                          **pycompat.strkwargs(opts))
                 except KeyError:
                     raise error.Abort("subrepository '%s' does not exist in %s!"
                                       % (sub, short(ctx.node())))
 
 def _performrevert(repo, parents, ctx, names, uipathfn, actions,
                    match, interactive=False, tobackup=None):
     """function that actually perform all the actions computed for revert
 
     This is an independent function to let extension to plug in and react to
     the imminent revert.
 
     Make sure you have the working directory locked when calling this function.
     """
     parent, p2 = parents
     node = ctx.node()
     excluded_files = []
 
     def checkout(f):
         fc = ctx[f]
         repo.wwrite(f, fc.data(), fc.flags())
 
     def doremove(f):
         try:
             rmdir = repo.ui.configbool('experimental', 'removeemptydirs')
             repo.wvfs.unlinkpath(f, rmdir=rmdir)
         except OSError:
             pass
         repo.dirstate.remove(f)
 
     def prntstatusmsg(action, f):
         exact = names[f]
         if repo.ui.verbose or not exact:
             repo.ui.status(actions[action][1] % uipathfn(f))
 
     audit_path = pathutil.pathauditor(repo.root, cached=True)
     for f in actions['forget'][0]:
         if interactive:
             choice = repo.ui.promptchoice(
                 _("forget added file %s (Yn)?$$ &Yes $$ &No") % uipathfn(f))
             if choice == 0:
                 prntstatusmsg('forget', f)
                 repo.dirstate.drop(f)
             else:
                 excluded_files.append(f)
         else:
             prntstatusmsg('forget', f)
             repo.dirstate.drop(f)
     for f in actions['remove'][0]:
         audit_path(f)
         if interactive:
             choice = repo.ui.promptchoice(
                 _("remove added file %s (Yn)?$$ &Yes $$ &No") % uipathfn(f))
             if choice == 0:
                 prntstatusmsg('remove', f)
                 doremove(f)
             else:
                 excluded_files.append(f)
         else:
             prntstatusmsg('remove', f)
             doremove(f)
     for f in actions['drop'][0]:
         audit_path(f)
         prntstatusmsg('drop', f)
         repo.dirstate.remove(f)
 
     normal = None
     if node == parent:
         # We're reverting to our parent. If possible, we'd like status
         # to report the file as clean. We have to use normallookup for
         # merges to avoid losing information about merged/dirty files.
         if p2 != nullid:
             normal = repo.dirstate.normallookup
         else:
             normal = repo.dirstate.normal
 
     newlyaddedandmodifiedfiles = set()
     if interactive:
         # Prompt the user for changes to revert
         torevert = [f for f in actions['revert'][0] if f not in excluded_files]
         m = scmutil.matchfiles(repo, torevert)
         diffopts = patch.difffeatureopts(repo.ui, whitespace=True,
                                          section='commands',
                                          configprefix='revert.interactive.')
         diffopts.nodates = True
         diffopts.git = True
         operation = 'apply'
         if node == parent:
             if repo.ui.configbool('experimental',
                                   'revert.interactive.select-to-keep'):
                 operation = 'keep'
             else:
                 operation = 'discard'
 
         if operation == 'apply':
             diff = patch.diff(repo, None, ctx.node(), m, opts=diffopts)
         else:
             diff = patch.diff(repo, ctx.node(), None, m, opts=diffopts)
         originalchunks = patch.parsepatch(diff)
 
         try:
 
             chunks, opts = recordfilter(repo.ui, originalchunks, match,
                                         operation=operation)
             if operation == 'discard':
                 chunks = patch.reversehunks(chunks)
 
         except error.PatchError as err:
             raise error.Abort(_('error parsing patch: %s') % err)
 
         newlyaddedandmodifiedfiles = newandmodified(chunks, originalchunks)
         if tobackup is None:
             tobackup = set()
         # Apply changes
         fp = stringio()
         # chunks are serialized per file, but files aren't sorted
         for f in sorted(set(c.header.filename() for c in chunks if ishunk(c))):
             prntstatusmsg('revert', f)
         files = set()
         for c in chunks:
             if ishunk(c):
                 abs = c.header.filename()
                 # Create a backup file only if this hunk should be backed up
                 if c.header.filename() in tobackup:
                     target = repo.wjoin(abs)
                     bakname = scmutil.backuppath(repo.ui, repo, abs)
                     util.copyfile(target, bakname)
                     tobackup.remove(abs)
                 if abs not in files:
                     files.add(abs)
                     if operation == 'keep':
                         checkout(abs)
             c.write(fp)
         dopatch = fp.tell()
         fp.seek(0)
         if dopatch:
             try:
                 patch.internalpatch(repo.ui, repo, fp, 1, eolmode=None)
             except error.PatchError as err:
                 raise error.Abort(pycompat.bytestr(err))
         del fp
     else:
         for f in actions['revert'][0]:
             prntstatusmsg('revert', f)
             checkout(f)
             if normal:
                 normal(f)
 
     for f in actions['add'][0]:
         # Don't checkout modified files, they are already created by the diff
         if f not in newlyaddedandmodifiedfiles:
             prntstatusmsg('add', f)
             checkout(f)
             repo.dirstate.add(f)
 
     normal = repo.dirstate.normallookup
     if node == parent and p2 == nullid:
         normal = repo.dirstate.normal
     for f in actions['undelete'][0]:
         if interactive:
             choice = repo.ui.promptchoice(
                 _("add back removed file %s (Yn)?$$ &Yes $$ &No") % f)
             if choice == 0:
                 prntstatusmsg('undelete', f)
                 checkout(f)
                 normal(f)
             else:
                 excluded_files.append(f)
         else:
             prntstatusmsg('undelete', f)
             checkout(f)
             normal(f)
 
     copied = copies.pathcopies(repo[parent], ctx)
 
     for f in actions['add'][0] + actions['undelete'][0] + actions['revert'][0]:
         if f in copied:
             repo.dirstate.copy(copied[f], f)
 
 # a list of (ui, repo, otherpeer, opts, missing) functions called by
 # commands.outgoing.  "missing" is "missing" of the result of
 # "findcommonoutgoing()"
 outgoinghooks = util.hooks()
 
 # a list of (ui, repo) functions called by commands.summary
 summaryhooks = util.hooks()
 
 # a list of (ui, repo, opts, changes) functions called by commands.summary.
 #
 # functions should return tuple of booleans below, if 'changes' is None:
 #  (whether-incomings-are-needed, whether-outgoings-are-needed)
 #
 # otherwise, 'changes' is a tuple of tuples below:
 #  - (sourceurl, sourcebranch, sourcepeer, incoming)
 #  - (desturl,   destbranch,   destpeer,   outgoing)
 summaryremotehooks = util.hooks()
 
 
 def checkunfinished(repo, commit=False, skipmerge=False):
     '''Look for an unfinished multistep operation, like graft, and abort
     if found. It's probably good to check this right before
     bailifchanged().
     '''
     # Check for non-clearable states first, so things like rebase will take
     # precedence over update.
     for state in statemod._unfinishedstates:
         if (state._clearable or (commit and state._allowcommit) or
             state._reportonly):
             continue
         if state.isunfinished(repo):
             raise error.Abort(state.msg(), hint=state.hint())
 
     for s in statemod._unfinishedstates:
         if (not s._clearable or (commit and s._allowcommit) or
             (s._opname == 'merge' and skipmerge) or s._reportonly):
             continue
         if s.isunfinished(repo):
             raise error.Abort(s.msg(), hint=s.hint())
 
 def clearunfinished(repo):
     '''Check for unfinished operations (as above), and clear the ones
     that are clearable.
     '''
     for state in statemod._unfinishedstates:
         if state._reportonly:
             continue
         if not state._clearable and state.isunfinished(repo):
             raise error.Abort(state.msg(), hint=state.hint())
 
     for s in statemod._unfinishedstates:
         if s._opname == 'merge' or state._reportonly:
             continue
         if s._clearable and s.isunfinished(repo):
             util.unlink(repo.vfs.join(s._fname))
 
 def getunfinishedstate(repo):
     ''' Checks for unfinished operations and returns statecheck object
         for it'''
     for state in statemod._unfinishedstates:
         if state.isunfinished(repo):
             return state
     return None
 
 def howtocontinue(repo):
     '''Check for an unfinished operation and return the command to finish
     it.
 
     statemod._unfinishedstates list is checked for an unfinished operation
     and the corresponding message to finish it is generated if a method to
     continue is supported by the operation.
 
     Returns a (msg, warning) tuple. 'msg' is a string and 'warning' is
     a boolean.
     '''
     contmsg = _("continue: %s")
     for state in statemod._unfinishedstates:
         if not state._continueflag:
             continue
         if state.isunfinished(repo):
             return contmsg % state.continuemsg(), True
     if repo[None].dirty(missing=True, merge=False, branch=False):
         return contmsg % _("hg commit"), False
     return None, None
 
 def checkafterresolved(repo):
     '''Inform the user about the next action after completing hg resolve
 
     If there's a an unfinished operation that supports continue flag,
     howtocontinue will yield repo.ui.warn as the reporter.
 
     Otherwise, it will yield repo.ui.note.
     '''
     msg, warning = howtocontinue(repo)
     if msg is not None:
         if warning:
             repo.ui.warn("%s\n" % msg)
         else:
             repo.ui.note("%s\n" % msg)
 
 def wrongtooltocontinue(repo, task):
     '''Raise an abort suggesting how to properly continue if there is an
     active task.
 
     Uses howtocontinue() to find the active task.
 
     If there's no task (repo.ui.note for 'hg commit'), it does not offer
     a hint.
     '''
     after = howtocontinue(repo)
     hint = None
     if after[1]:
         hint = after[0]
     raise error.Abort(_('no %s in progress') % task, hint=hint)
 
 def abortgraft(ui, repo, graftstate):
     """abort the interrupted graft and rollbacks to the state before interrupted
     graft"""
     if not graftstate.exists():
         raise error.Abort(_("no interrupted graft to abort"))
     statedata = readgraftstate(repo, graftstate)
     newnodes = statedata.get('newnodes')
     if newnodes is None:
         # and old graft state which does not have all the data required to abort
         # the graft
         raise error.Abort(_("cannot abort using an old graftstate"))
 
     # changeset from which graft operation was started
     if len(newnodes) > 0:
         startctx = repo[newnodes[0]].p1()
     else:
         startctx = repo['.']
     # whether to strip or not
     cleanup = False
     from . import hg
     if newnodes:
         newnodes = [repo[r].rev() for r in newnodes]
         cleanup = True
         # checking that none of the newnodes turned public or is public
         immutable = [c for c in newnodes if not repo[c].mutable()]
         if immutable:
             repo.ui.warn(_("cannot clean up public changesets %s\n")
                          % ', '.join(bytes(repo[r]) for r in immutable),
                          hint=_("see 'hg help phases' for details"))
             cleanup = False
 
         # checking that no new nodes are created on top of grafted revs
         desc = set(repo.changelog.descendants(newnodes))
         if desc - set(newnodes):
             repo.ui.warn(_("new changesets detected on destination "
                            "branch, can't strip\n"))
             cleanup = False
 
         if cleanup:
             with repo.wlock(), repo.lock():
                 hg.updaterepo(repo, startctx.node(), overwrite=True)
                 # stripping the new nodes created
                 strippoints = [c.node() for c in repo.set("roots(%ld)",
                                                           newnodes)]
                 repair.strip(repo.ui, repo, strippoints, backup=False)
 
     if not cleanup:
         # we don't update to the startnode if we can't strip
         startctx = repo['.']
         hg.updaterepo(repo, startctx.node(), overwrite=True)
 
     ui.status(_("graft aborted\n"))
     ui.status(_("working directory is now at %s\n") % startctx.hex()[:12])
     graftstate.delete()
     return 0
 
 def readgraftstate(repo, graftstate):
     """read the graft state file and return a dict of the data stored in it"""
     try:
         return graftstate.read()
     except error.CorruptedState:
         nodes = repo.vfs.read('graftstate').splitlines()
         return {'nodes': nodes}
+
+def hgabortgraft(ui, repo):
+    """ abort logic for aborting graft using 'hg abort'"""
+    with repo.wlock():
+        graftstate = statemod.cmdstate(repo, 'graftstate')
+        return abortgraft(ui, repo, graftstate)

mercurial/commands.py

@@ -1,6395 +1,6401 b''
 # 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,
     wdirhex,
     wdirrev,
 )
 from . import (
     archival,
     bookmarks,
     bundle2,
     changegroup,
     cmdutil,
     copies,
     debugcommands as debugcommandsmod,
     destutil,
     dirstateguard,
     discovery,
     encoding,
     error,
     exchange,
     extensions,
     filemerge,
     formatter,
     graphmod,
     hbisect,
     help,
     hg,
     logcmdutil,
     merge as mergemod,
     narrowspec,
     obsolete,
     obsutil,
     patch,
     phases,
     pycompat,
     rcutil,
     registrar,
     revsetlang,
     rewriteutil,
     scmutil,
     server,
     shelve as shelvemod,
     state as statemod,
     streamclone,
     tags as tagsmod,
     ui as uimod,
     util,
     verify as verifymod,
     wireprotoserver,
 )
 from .utils import (
     dateutil,
     stringutil,
 )
 
 table = {}
 table.update(debugcommandsmod.command._table)
 
 command = registrar.command(table)
 INTENT_READONLY = registrar.INTENT_READONLY
 
 # 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('abort',
     dryrunopts, helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
     helpbasic=True)
 def abort(ui, repo, **opts):
     """abort an unfinished operation (EXPERIMENTAL)
 
     Aborts a multistep operation like graft, histedit, rebase, merge,
     and unshelve if they are in an unfinished state.
 
     use --dry-run/-n to dry run the command.
     A new operation can be added to this by registering the operation and
     abort logic in the unfinishedstates list under statemod.
     """
     dryrun = opts.get(r'dry_run')
     abortstate = cmdutil.getunfinishedstate(repo)
     if not abortstate:
         raise error.Abort(_('no operation in progress'))
     if not abortstate.abortfunc:
         raise error.Abort((_("%s in progress but does not support 'hg abort'") %
                             (abortstate._opname)), hint=abortstate.hint())
     if dryrun:
         ui.status(_('%s in progress, will be aborted\n') % (abortstate._opname))
         return
     return abortstate.abortfunc(ui, repo)
 
 @command('add',
     walkopts + subrepoopts + dryrunopts,
     _('[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True, inferrepo=True)
 def add(ui, repo, *pats, **opts):
     """add the specified files on the next commit
 
     Schedule files to be version controlled and added to the
     repository.
 
     The files will be added to the repository at the next commit. To
     undo an add before that, see :hg:`forget`.
 
     If no names are given, add all files to the repository (except
     files matching ``.hgignore``).
 
     .. container:: verbose
 
        Examples:
 
          - New (unknown) files are added
            automatically by :hg:`add`::
 
              $ ls
              foo.c
              $ hg status
              ? foo.c
              $ hg add
              adding foo.c
              $ hg status
              A foo.c
 
          - Specific files to be added can be specified::
 
              $ ls
              bar.c  foo.c
              $ hg status
              ? bar.c
              ? foo.c
              $ hg add bar.c
              $ hg status
              A bar.c
              ? foo.c
 
     Returns 0 if all files are successfully added.
     """
 
     m = scmutil.match(repo[None], pats, pycompat.byteskwargs(opts))
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     rejected = cmdutil.add(ui, repo, m, "", uipathfn, False, **opts)
     return rejected and 1 or 0
 
 @command('addremove',
     similarityopts + subrepoopts + walkopts + dryrunopts,
     _('[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     inferrepo=True)
 def addremove(ui, repo, *pats, **opts):
     """add all new files, delete all missing files
 
     Add all new files and remove all missing files from the
     repository.
 
     Unless names are given, new files are ignored if they match any of
     the patterns in ``.hgignore``. As with add, these changes take
     effect at the next commit.
 
     Use the -s/--similarity option to detect renamed files. This
     option takes a percentage between 0 (disabled) and 100 (files must
     be identical) as its parameter. With a parameter greater than 0,
     this compares every removed file with every added file and records
     those similar enough as renames. Detecting renamed files this way
     can be expensive. After using this option, :hg:`status -C` can be
     used to check which files were identified as moved or renamed. If
     not specified, -s/--similarity defaults to 100 and only renames of
     identical files are detected.
 
     .. container:: verbose
 
        Examples:
 
          - A number of files (bar.c and foo.c) are new,
            while foobar.c has been removed (without using :hg:`remove`)
            from the repository::
 
              $ ls
              bar.c foo.c
              $ hg status
              ! foobar.c
              ? bar.c
              ? foo.c
              $ hg addremove
              adding bar.c
              adding foo.c
              removing foobar.c
              $ hg status
              A bar.c
              A foo.c
              R foobar.c
 
          - A file foobar.c was moved to foo.c without using :hg:`rename`.
            Afterwards, it was edited slightly::
 
              $ ls
              foo.c
              $ hg status
              ! foobar.c
              ? foo.c
              $ hg addremove --similarity 90
              removing foobar.c
              adding foo.c
              recording removal of foobar.c as rename to foo.c (94% similar)
              $ hg status -C
              A foo.c
                foobar.c
              R foobar.c
 
     Returns 0 if all files are successfully added.
     """
     opts = pycompat.byteskwargs(opts)
     if not opts.get('similarity'):
         opts['similarity'] = '100'
     matcher = scmutil.match(repo[None], pats, opts)
     relative = scmutil.anypats(pats, opts)
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=relative)
     return scmutil.addremove(repo, matcher, "", uipathfn, opts)
 
 @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...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     helpbasic=True, inferrepo=True)
 def annotate(ui, repo, *pats, **opts):
     """show changeset information by line for each file
 
     List changes in files, showing the revision id responsible for
     each line.
 
     This command is useful for discovering when a change was made and
     by whom.
 
     If you include --file, --user, or --date, the revision number is
     suppressed unless you also include --number.
 
     Without the -a/--text option, annotate will avoid processing files
     it detects as binary. With -a, annotate will annotate the file
     anyway, although the results will probably be neither useful
     nor desirable.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :lines:   List of lines with annotation data.
       :path:    String. Repository-absolute path of the specified file.
 
       And each entry of ``{lines}`` provides the following sub-keywords in
       addition to ``{date}``, ``{node}``, ``{rev}``, ``{user}``, etc.
 
       :line:    String. Line content.
       :lineno:  Integer. Line number at that revision.
       :path:    String. Repository-absolute path of the file at that revision.
 
       See :hg:`help templates.operators` for the list expansion syntax.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     if not pats:
         raise error.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
 
     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'))
 
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
     ctx = scmutil.revsingle(repo, rev)
 
     ui.pager('annotate')
     rootfm = ui.formatter('annotate', opts)
     if ui.debugflag:
         shorthex = pycompat.identity
     else:
         def shorthex(h):
             return h[:12]
     if ui.quiet:
         datefunc = dateutil.shortdate
     else:
         datefunc = dateutil.datestr
     if ctx.rev() is None:
         if opts.get('changeset'):
             # omit "+" suffix which is appended to node hex
             def formatrev(rev):
                 if rev == wdirrev:
                     return '%d' % ctx.p1().rev()
                 else:
                     return '%d' % rev
         else:
             def formatrev(rev):
                 if rev == wdirrev:
                     return '%d+' % ctx.p1().rev()
                 else:
                     return '%d ' % rev
         def formathex(h):
             if h == wdirhex:
                 return '%s+' % shorthex(hex(ctx.p1().node()))
             else:
                 return '%s ' % shorthex(h)
     else:
         formatrev = b'%d'.__mod__
         formathex = shorthex
 
     opmap = [
         ('user', ' ', lambda x: x.fctx.user(), ui.shortuser),
         ('rev', ' ', lambda x: scmutil.intrev(x.fctx), formatrev),
         ('node', ' ', lambda x: hex(scmutil.binnode(x.fctx)), formathex),
         ('date', ' ', lambda x: x.fctx.date(), util.cachefunc(datefunc)),
         ('path', ' ', lambda x: x.fctx.path(), pycompat.bytestr),
         ('lineno', ':', lambda x: x.lineno, pycompat.bytestr),
     ]
     opnamemap = {
         'rev': 'number',
         'node': 'changeset',
         'path': 'file',
         'lineno': 'line_number',
     }
 
     if rootfm.isplain():
         def makefunc(get, fmt):
             return lambda x: fmt(get(x))
     else:
         def makefunc(get, fmt):
             return get
     datahint = rootfm.datahint()
     funcmap = [(makefunc(get, fmt), sep) for fn, sep, get, fmt in opmap
                if opts.get(opnamemap.get(fn, fn)) or fn in datahint]
     funcmap[0] = (funcmap[0][0], '') # no separator in front of first column
     fields = ' '.join(fn for fn, sep, get, fmt in opmap
                       if opts.get(opnamemap.get(fn, fn)) or fn in datahint)
 
     def bad(x, y):
         raise error.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)
 
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     for abs in ctx.walk(m):
         fctx = ctx[abs]
         rootfm.startitem()
         rootfm.data(path=abs)
         if not opts.get('text') and fctx.isbinary():
             rootfm.plain(_("%s: binary file\n") % uipathfn(abs))
             continue
 
         fm = rootfm.nested('lines', tmpl='{rev}: {line}')
         lines = fctx.annotate(follow=follow, skiprevs=skiprevs,
                               diffopts=diffopts)
         if not lines:
             fm.end()
             continue
         formats = []
         pieces = []
 
         for f, sep in funcmap:
             l = [f(n) for n in lines]
             if fm.isplain():
                 sizes = [encoding.colwidth(x) for x in l]
                 ml = max(sizes)
                 formats.append([sep + ' ' * (ml - w) + '%s' for w in sizes])
             else:
                 formats.append(['%s' for x in l])
             pieces.append(l)
 
         for f, p, n in zip(zip(*formats), zip(*pieces), lines):
             fm.startitem()
             fm.context(fctx=n.fctx)
             fm.write(fields, "".join(f), *p)
             if n.skip:
                 fmt = "* %s"
             else:
                 fmt = ": %s"
             fm.write('line', fmt, n.text)
 
         if not lines[-1].text.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'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT)
 def archive(ui, repo, dest, **opts):
     '''create an unversioned archive of a repository revision
 
     By default, the revision used is the parent of the working
     directory; use -r/--rev to specify a different revision.
 
     The archive type is automatically detected based on file
     extension (to override, use -t/--type).
 
     .. container:: verbose
 
       Examples:
 
       - create a zip file containing the 1.0 release::
 
           hg archive -r 1.0 project-1.0.zip
 
       - create a tarball excluding .hg files::
 
           hg archive project.tar.gz -X ".hg*"
 
     Valid types are:
 
     :``files``: a directory full of files (default)
     :``tar``:   tar archive, uncompressed
     :``tbz2``:  tar archive, compressed using bzip2
     :``tgz``:   tar archive, compressed using gzip
     :``uzip``:  zip archive, uncompressed
     :``zip``:   zip archive, compressed using deflate
 
     The exact name of the destination archive or directory is given
     using a format string; see :hg:`help export` for details.
 
     Each member added to an archive file has a directory prefix
     prepended. Use -p/--prefix to specify a format string for the
     prefix. The default is the basename of the archive, with suffixes
     removed.
 
     Returns 0 on success.
     '''
 
     opts = pycompat.byteskwargs(opts)
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
     ctx = scmutil.revsingle(repo, rev)
     if not ctx:
         raise error.Abort(_('no working directory: please specify a revision'))
     node = ctx.node()
     dest = cmdutil.makefilename(ctx, dest)
     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(ctx, dest)
         if not prefix:
             prefix = os.path.basename(repo.root) + '-%h'
 
     prefix = cmdutil.makefilename(ctx, prefix)
     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'),
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT)
 def backout(ui, repo, node=None, rev=None, **opts):
     '''reverse effect of earlier changeset
 
     Prepare a new changeset with the effect of REV undone in the
     current working directory. If no conflicts were encountered,
     it will be committed immediately.
 
     If REV is the parent of the working directory, then this new changeset
     is committed automatically (unless --no-commit is specified).
 
     .. note::
 
        :hg:`backout` cannot be used to fix either an unwanted or
        incorrect merge.
 
     .. container:: verbose
 
       Examples:
 
       - Reverse the effect of the parent of the working directory.
         This backout will be committed immediately::
 
           hg backout -r .
 
       - Reverse the effect of previous bad revision 23::
 
           hg backout -r 23
 
       - Reverse the effect of previous bad revision 23 and
         leave changes uncommitted::
 
           hg backout -r 23 --no-commit
           hg commit -m "Backout revision 23"
 
       By default, the pending changeset will have one parent,
       maintaining a linear history. With --merge, the pending
       changeset will instead have two parents: the old parent of the
       working directory and a new child of REV that simply undoes REV.
 
       Before version 1.7, the behavior without --merge was equivalent
       to specifying --merge followed by :hg:`update --clean .` to
       cancel the merge and leave the child of REV as a head to be
       merged separately.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help revert` for a way to restore files to the state
     of another revision.
 
     Returns 0 on success, 1 if nothing to backout or there are unresolved
     files.
     '''
     with repo.wlock(), repo.lock():
         return _dobackout(ui, repo, node, rev, **opts)
 
 def _dobackout(ui, repo, node=None, rev=None, **opts):
     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'] = dateutil.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:
         with dirstateguard.dirstateguard(repo, 'backout'):
             overrides = {('ui', 'forcemerge'): opts.get('tool', '')}
             with ui.configoverride(overrides, 'backout'):
                 stats = mergemod.update(repo, parent, branchmerge=True,
                                         force=True, ancestor=node,
                                         mergeancestor=False)
             repo.setparents(op1, op2)
         hg._showstats(repo, stats)
         if stats.unresolvedcount:
             repo.ui.status(_("use 'hg resolve' to retry unresolved "
                              "file merges\n"))
             return 1
     else:
         hg.clean(repo, node, show_stats=False)
         repo.dirstate.setbranch(branch)
         cmdutil.revert(ui, repo, rctx, 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()))
         overrides = {('ui', 'forcemerge'): opts.get('tool', '')}
         with ui.configoverride(overrides, 'backout'):
             return hg.merge(repo, hex(repo.changelog.tip()))
     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]"),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION)
 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[i].node() 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 = logcmdutil.changesetdisplayer(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.rev(), ctx,
                                                         transition))
                 hbisect.checkstate(state)
                 # bisect
                 nodes, changesets, bgood = hbisect.bisect(repo, state)
                 # update to next check
                 node = nodes[0]
                 mayupdate(repo, node, show_stats=False)
         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, 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')),
     ('l', 'list', False, _('list existing bookmarks')),
     ] + formatteropts,
     _('hg bookmarks [OPTIONS]... [NAME]...'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION)
 def bookmark(ui, repo, *names, **opts):
     '''create a new bookmark or list existing bookmarks
 
     Bookmarks are labels on changesets to help track lines of development.
     Bookmarks are unversioned and can be moved, renamed and deleted.
     Deleting or moving a bookmark has no effect on the associated changesets.
 
     Creating or updating to a bookmark causes it to be marked as 'active'.
     The active bookmark is indicated with a '*'.
     When a commit is made, the active bookmark will advance to the new commit.
     A plain :hg:`update` will also advance an active bookmark, if possible.
     Updating away from a bookmark will cause it to be deactivated.
 
     Bookmarks can be pushed and pulled between repositories (see
     :hg:`help push` and :hg:`help pull`). If a shared bookmark has
     diverged, a new 'divergent bookmark' of the form 'name@path' will
     be created. Using :hg:`merge` will resolve the divergence.
 
     Specifying bookmark as '.' to -m/-d/-l options is equivalent to specifying
     the active bookmark's name.
 
     A bookmark named '@' has the special property that :hg:`clone` will
     check it out by default if it exists.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions such as ``{bookmark}``. See also
       :hg:`help templates`.
 
       :active:  Boolean. True if the bookmark is active.
 
       Examples:
 
       - create an active bookmark for a new line of development::
 
           hg book new-feature
 
       - create an inactive bookmark as a place marker::
 
           hg book -i reviewed
 
       - create an inactive bookmark on another changeset::
 
           hg book -r .^ tested
 
       - rename bookmark turkey to dinner::
 
           hg book -m turkey dinner
 
       - move the '@' bookmark from another branch::
 
           hg book -f @
 
       - print only the active bookmark name::
 
           hg book -ql .
     '''
     opts = pycompat.byteskwargs(opts)
     force = opts.get('force')
     rev = opts.get('rev')
     inactive = opts.get('inactive')  # meaning add/rename to inactive bookmark
 
     selactions = [k for k in ['delete', 'rename', 'list'] if opts.get(k)]
     if len(selactions) > 1:
         raise error.Abort(_('--%s and --%s are incompatible')
                           % tuple(selactions[:2]))
     if selactions:
         action = selactions[0]
     elif names or rev:
         action = 'add'
     elif inactive:
         action = 'inactive'  # meaning deactivate
     else:
         action = 'list'
 
     if rev and action in {'delete', 'rename', 'list'}:
         raise error.Abort(_("--rev is incompatible with --%s") % action)
     if inactive and action in {'delete', 'list'}:
         raise error.Abort(_("--inactive is incompatible with --%s") % action)
     if not names and action in {'add', 'delete'}:
         raise error.Abort(_("bookmark name required"))
 
     if action in {'add', 'delete', 'rename', 'inactive'}:
         with repo.wlock(), repo.lock(), repo.transaction('bookmark') as tr:
             if action == 'delete':
                 names = pycompat.maplist(repo._bookmarks.expandname, names)
                 bookmarks.delete(repo, tr, names)
             elif action == 'rename':
                 if not names:
                     raise error.Abort(_("new bookmark name required"))
                 elif len(names) > 1:
                     raise error.Abort(_("only one new bookmark name allowed"))
                 oldname = repo._bookmarks.expandname(opts['rename'])
                 bookmarks.rename(repo, tr, oldname, names[0], force, inactive)
             elif action == 'add':
                 bookmarks.addbookmarks(repo, tr, names, rev, force, inactive)
             elif action == '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)
     elif action == 'list':
         names = pycompat.maplist(repo._bookmarks.expandname, names)
         with ui.formatter('bookmarks', opts) as fm:
             bookmarks.printbookmarks(ui, repo, fm, names)
     else:
         raise error.ProgrammingError('invalid action: %s' % action)
 
 @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')),
      ('r', 'rev', [], _('change branches of the given revs (EXPERIMENTAL)')),
     ],
     _('[-fC] [NAME]'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION)
 def branch(ui, repo, label=None, **opts):
     """set or show the current branch name
 
     .. note::
 
        Branch names are permanent and global. Use :hg:`bookmark` to create a
        light-weight bookmark instead. See :hg:`help glossary` for more
        information about named branches and bookmarks.
 
     With no argument, show the current branch name. With one argument,
     set the working directory branch name (the branch will not exist
     in the repository until the next commit). Standard practice
     recommends that primary development take place on the 'default'
     branch.
 
     Unless -f/--force is specified, branch will not let you set a
     branch name that already exists.
 
     Use -C/--clean to reset the working directory branch to that of
     the parent of the working directory, negating a previous branch
     change.
 
     Use the command :hg:`update` to switch to an existing branch. Use
     :hg:`commit --close-branch` to mark this branch head as closed.
     When all heads of a branch are closed, the branch will be
     considered closed.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     revs = opts.get('rev')
     if label:
         label = label.strip()
 
     if not opts.get('clean') and not label:
         if revs:
             raise error.Abort(_("no branch name specified for the revisions"))
         ui.write("%s\n" % repo.dirstate.branch())
         return
 
     with repo.wlock():
         if opts.get('clean'):
             label = repo['.'].branch()
             repo.dirstate.setbranch(label)
             ui.status(_('reset working directory to branch %s\n') % label)
         elif label:
 
             scmutil.checknewlabel(repo, label, 'branch')
             if revs:
                 return cmdutil.changebranch(ui, repo, revs, 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"))
 
             repo.dirstate.setbranch(label)
             ui.status(_('marked working directory as branch %s\n') % label)
 
             # find any open named branches aside from default
             for n, h, t, c in repo.branchmap().iterbranches():
                 if n != "default" and not c:
                     return 0
             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')),
      ('r', 'rev', [], _('show branch name(s) of the given rev'))
     ] + formatteropts,
     _('[-c]'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
     intents={INTENT_READONLY})
 def branches(ui, repo, active=False, closed=False, **opts):
     """list repository named branches
 
     List the repository's named branches, indicating which ones are
     inactive. If -c/--closed is specified, also list branches which have
     been marked closed (see :hg:`commit --close-branch`).
 
     Use the command :hg:`update` to switch to an existing branch.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions such as ``{branch}``. See also
       :hg:`help templates`.
 
       :active:  Boolean. True if the branch is active.
       :closed:  Boolean. True if the branch is closed.
       :current: Boolean. True if it is the current branch.
 
     Returns 0.
     """
 
     opts = pycompat.byteskwargs(opts)
     revs = opts.get('rev')
     selectedbranches = None
     if revs:
         revs = scmutil.revrange(repo, revs)
         getbi = repo.revbranchcache().branchinfo
         selectedbranches = {getbi(r)[0] for r in revs}
 
     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():
         if selectedbranches is not None and tag not in selectedbranches:
             continue
         isactive = False
         if not isclosed:
             openheads = set(repo.branchmap().iteropen(heads))
             isactive = bool(openheads & allheads)
         branches.append((tag, repo[tip], isactive, not isclosed))
     branches.sort(key=lambda i: (i[2], i[1].rev(), i[0], i[3]),
                   reverse=True)
 
     for tag, ctx, isactive, isopen in branches:
         if active and not isactive:
             continue
         if isactive:
             label = '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("%d" % 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]'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT)
 def bundle(ui, repo, fname, dest=None, **opts):
     """create a bundle file
 
     Generate a bundle file containing data to be transferred to another
     repository.
 
     To create a bundle containing all changesets, use -a/--all
     (or --base null). Otherwise, hg assumes the destination will have
     all the nodes you specify with --base parameters. Otherwise, hg
     will assume the repository has all the nodes in destination, or
     default-push/default if no destination is specified, where destination
     is the repository you provide through DEST option.
 
     You can change bundle format with the -t/--type option. See
     :hg:`help bundlespec` for documentation on this format. By default,
     the most appropriate format is used and compression defaults to
     bzip2.
 
     The bundle file can then be transferred using conventional means
     and applied to another repository with the unbundle or pull
     command. This is useful when direct push and pull are not
     available or when exporting an entire repository is undesirable.
 
     Applying bundles preserves all changeset contents including
     permissions, copy/rename information, and revision history.
 
     Returns 0 on success, 1 if no changes found.
     """
     opts = pycompat.byteskwargs(opts)
     revs = None
     if '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:
         bundlespec = exchange.parsebundlespec(repo, bundletype, strict=False)
     except error.UnsupportedBundleSpecification as e:
         raise error.Abort(pycompat.bytestr(e),
                           hint=_("see 'hg help bundlespec' for supported "
                                  "values for --type"))
     cgversion = bundlespec.contentopts["cg.version"]
 
     # 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 = [nullrev]
     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[rev].node() for rev in base]
         heads = [repo[r].node() for r in revs] if revs else 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 = [repo[r].hex() for r in revs]
         revs, checkout = hg.addbranchrevs(repo, repo, branches, revs)
         heads = revs and pycompat.maplist(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
         bversion = 'HG10' + bundlespec.wirecompression
         bcompression = None
     elif cgversion in ('02', '03'):
         bversion = 'HG20'
         bcompression = bundlespec.wirecompression
     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.' + bundlespec.compression)
     if complevel is None:
         complevel = ui.configint('experimental', 'bundlecomplevel')
     if complevel is not None:
         compopts['level'] = complevel
 
     # Allow overriding the bundling of obsmarker in phases through
     # configuration while we don't have a bundle version that include them
     if repo.ui.configbool('experimental', 'evolution.bundle-obsmarker'):
         bundlespec.contentopts['obsolescence'] = True
     if repo.ui.configbool('experimental', 'bundle-phases'):
         bundlespec.contentopts['phases'] = True
 
     bundle2.writenewbundle(ui, repo, 'bundle', fname, bversion, outgoing,
                            bundlespec.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...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     inferrepo=True,
     intents={INTENT_READONLY})
 def cat(ui, repo, file1, *pats, **opts):
     """output the current or given revision of files
 
     Print the specified files as they were at the given revision. If
     no revision is given, the parent of the working directory is used.
 
     Output may be to a file, in which case the name of the file is
     given using a template string. See :hg:`help templates`. In addition
     to the common template keywords, the following formatting rules are
     supported:
 
     :``%%``: literal "%" character
     :``%s``: basename of file being printed
     :``%d``: dirname of file being printed, or '.' if in repository root
     :``%p``: root-relative path name of file being printed
     :``%H``: changeset hash (40 hexadecimal digits)
     :``%R``: changeset revision number
     :``%h``: short-form changeset hash (12 hexadecimal digits)
     :``%r``: zero-padded changeset revision number
     :``%b``: basename of the exporting repository
     :``\\``: literal "\\" character
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :data:    String. File content.
       :path:    String. Repository-absolute path of the file.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
     ctx = scmutil.revsingle(repo, rev)
     m = scmutil.match(ctx, (file1,) + pats, opts)
     fntemplate = opts.pop('output', '')
     if cmdutil.isstdiofilename(fntemplate):
         fntemplate = ''
 
     if fntemplate:
         fm = formatter.nullformatter(ui, 'cat', opts)
     else:
         ui.pager('cat')
         fm = ui.formatter('cat', opts)
     with fm:
         return cmdutil.cat(ui, repo, ctx, m, fm, fntemplate, '',
                            **pycompat.strkwargs(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', [], _('do not clone everything, but include this changeset'
                        ' and its ancestors'), _('REV')),
     ('b', 'branch', [], _('do not clone everything, but include this branch\'s'
                           ' changesets and their ancestors'), _('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]'),
     helpcategory=command.CATEGORY_REPO_CREATION,
     helpbasic=True, norepo=True)
 def clone(ui, source, dest=None, **opts):
     """make a copy of an existing repository
 
     Create a copy of an existing repository in a new directory.
 
     If no destination directory name is specified, it defaults to the
     basename of the source.
 
     The location of the source is added to the new repository's
     ``.hg/hgrc`` file, as the default to be used for future pulls.
 
     Only local paths and ``ssh://`` URLs are supported as
     destinations. For ``ssh://`` destinations, no working directory or
     ``.hg/hgrc`` will be created on the remote side.
 
     If the source repository has a bookmark called '@' set, that
     revision will be checked out in the new repository by default.
 
     To check out a particular version, use -u/--update, or
     -U/--noupdate to create a clone with no working directory.
 
     To pull only a subset of changesets, specify one or more revisions
     identifiers with -r/--rev or branches with -b/--branch. The
     resulting clone will contain only the specified changesets and
     their ancestors. These options (or 'clone src#rev dest') imply
     --pull, even for local source repositories.
 
     In normal clone mode, the remote normalizes repository data into a common
     exchange format and the receiving end translates this data into its local
     storage format. --stream activates a different clone mode that essentially
     copies repository files from the remote with minimal data processing. This
     significantly reduces the CPU cost of a clone both remotely and locally.
     However, it often increases the transferred data size by 30-40%. This can
     result in substantially faster clones where I/O throughput is plentiful,
     especially for larger repositories. A side-effect of --stream clones is
     that storage settings and requirements on the remote are applied locally:
     a modern client may inherit legacy or inefficient storage used by the
     remote or a legacy Mercurial client may not be able to clone from a
     modern Mercurial remote.
 
     .. note::
 
        Specifying a tag will include the tagged changeset but not the
        changeset containing the tag.
 
     .. container:: verbose
 
       For efficiency, hardlinks are used for cloning whenever the
       source and destination are on the same filesystem (note this
       applies only to the repository data, not to the working
       directory). Some filesystems, such as AFS, implement hardlinking
       incorrectly, but do not report errors. In these cases, use the
       --pull option to avoid hardlinking.
 
       Mercurial will update the working directory to the first applicable
       revision from this list:
 
       a) null if -U or the source repository has no changesets
       b) if -u . and the source repository is local, the first parent of
          the source repository's working directory
       c) the changeset specified with -u (if a branch name, this means the
          latest head of that branch)
       d) the changeset specified with -r
       e) the tipmost head specified with -b
       f) the tipmost head specified with the url#branch source syntax
       g) the revision marked with the '@' bookmark, if present
       h) the tipmost head of the default branch
       i) tip
 
       When cloning from servers that support it, Mercurial may fetch
       pre-generated data from a server-advertised URL or inline from the
       same stream. When this is done, hooks operating on incoming changesets
       and changegroups may fire more than once, once for each pre-generated
       bundle and as well as for any additional remaining data. In addition,
       if an error occurs, the repository may be rolled back to a partial
       clone. This behavior may change in future releases.
       See :hg:`help -e clonebundles` for more.
 
       Examples:
 
       - clone a remote repository to a new directory named hg/::
 
           hg clone https://www.mercurial-scm.org/repo/hg/
 
       - create a lightweight local clone::
 
           hg clone project/ project-feature/
 
       - clone from an absolute path on an ssh server (note double-slash)::
 
           hg clone ssh://user@server//home/projects/alpha/
 
       - do a streaming clone while checking out a specified version::
 
           hg clone --stream http://server/repo -u 1.5
 
       - create a repository without changesets after a particular revision::
 
           hg clone -r 04e544 experimental/ good/
 
       - clone (and track) a particular named branch::
 
           hg clone https://www.mercurial-scm.org/repo/hg/#stable
 
     See :hg:`help urls` for details on specifying URLs.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get('noupdate') and opts.get('updaterev'):
         raise error.Abort(_("cannot specify both --noupdate and --updaterev"))
 
     # --include/--exclude can come from narrow or sparse.
     includepats, excludepats = None, None
 
     # hg.clone() differentiates between None and an empty set. So make sure
     # patterns are sets if narrow is requested without patterns.
     if opts.get('narrow'):
         includepats = set()
         excludepats = set()
 
         if opts.get('include'):
             includepats = narrowspec.parsepatterns(opts.get('include'))
         if opts.get('exclude'):
             excludepats = narrowspec.parsepatterns(opts.get('exclude'))
 
     r = hg.clone(ui, opts, source, dest,
                  pull=opts.get('pull'),
                  stream=opts.get('stream') or opts.get('uncompressed'),
                  revs=opts.get('rev'),
                  update=opts.get('updaterev') or not opts.get('noupdate'),
                  branch=opts.get('branch'),
                  shareopts=opts.get('shareopts'),
                  storeincludepats=includepats,
                  storeexcludepats=excludepats,
                  depth=opts.get('depth') or None)
 
     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')),
     ('', 'force-close-branch', None,
      _('forcibly close branch from a non-head changeset (ADVANCED)')),
     ('i', 'interactive', None, _('use interactive mode')),
     ] + walkopts + commitopts + commitopts2 + subrepoopts,
     _('[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_COMMITTING, helpbasic=True,
     inferrepo=True)
 def commit(ui, repo, *pats, **opts):
     """commit the specified files or all outstanding changes
 
     Commit changes to the given files into the repository. Unlike a
     centralized SCM, this operation is a local operation. See
     :hg:`push` for a way to actively distribute your changes.
 
     If a list of files is omitted, all changes reported by :hg:`status`
     will be committed.
 
     If you are committing the result of a merge, do not provide any
     filenames or -I/-X filters.
 
     If no commit message is specified, Mercurial starts your
     configured editor where you can enter a message. In case your
     commit fails, you will find a backup of your message in
     ``.hg/last-message.txt``.
 
     The --close-branch flag can be used to mark the current branch
     head closed. When all heads of a branch are closed, the branch
     will be considered closed and no longer listed.
 
     The --amend flag can be used to amend the parent of the
     working directory with a new commit that contains the changes
     in the parent in addition to those currently reported by :hg:`status`,
     if there are any. The old commit is stored in a backup bundle in
     ``.hg/strip-backup`` (see :hg:`help bundle` and :hg:`help unbundle`
     on how to restore it).
 
     Message, user and date are taken from the amended commit unless
     specified. When a message isn't specified on the command line,
     the editor will open with the message of the amended commit.
 
     It is not possible to amend public changesets (see :hg:`help phases`)
     or changesets that have children.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success, 1 if nothing changed.
 
     .. container:: verbose
 
       Examples:
 
       - commit all files ending in .py::
 
           hg commit --include "set:**.py"
 
       - commit all non-binary files::
 
           hg commit --exclude "set:binary()"
 
       - amend the current commit and set the date to now::
 
           hg commit --amend --date now
     """
     with repo.wlock(), repo.lock():
         return _docommit(ui, repo, *pats, **opts)
 
 def _docommit(ui, repo, *pats, **opts):
     if opts.get(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') or opts.get('force_close_branch'):
         extra['close'] = '1'
 
         if repo['.'].closesbranch():
             raise error.Abort(_('current revision is already a branch closing'
                                 ' head'))
         elif not bheads:
             raise error.Abort(_('branch "%s" has no heads to close') % branch)
         elif (branch == repo['.'].branch() and repo['.'].node() not in bheads
               and not opts.get('force_close_branch')):
             hint = _('use --force-close-branch to close branch from a non-head'
                      ' changeset')
             raise error.Abort(_('can only close branch heads'), hint=hint)
         elif opts.get('amend'):
             if (repo['.'].p1().branch() != branch and
                 repo['.'].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['.']
         rewriteutil.precheck(repo, [old.rev()], 'amend')
 
         # Currently histedit gets confused if an amend happens while histedit
         # is in progress. Since we have a checkunfinished command, we are
         # temporarily honoring it.
         #
         # Note: eventually this guard will be removed. Please do not expect
         # this behavior to remain.
         if not obsolete.isenabled(repo, obsolete.createmarkersopt):
             cmdutil.checkunfinished(repo)
 
         node = cmdutil.amend(ui, repo, old, extra, pats, opts)
         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)
 
     if not ui.quiet and ui.configbool('commands', 'commit.post-status'):
         status(ui, repo, modified=True, added=True, removed=True, deleted=True,
                unknown=True, subrepos=opts.get('subrepos'))
 
 @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]...'),
     helpcategory=command.CATEGORY_HELP,
     optionalrepo=True,
     intents={INTENT_READONLY})
 def config(ui, repo, *values, **opts):
     """show combined config settings from all hgrc files
 
     With no arguments, print names and values of all config items.
 
     With one argument of the form section.name, print just the value
     of that config item.
 
     With multiple arguments, print names and values of all config
     items with matching section names or section.names.
 
     With --edit, start an editor on the user-level config file. With
     --global, edit the system-wide config file. With --local, edit the
     repository-level config file.
 
     With --debug, the source (filename and line number) is printed
     for each config item.
 
     See :hg:`help config` for more information about config files.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported. See also :hg:`help templates`.
 
       :name:    String. Config name.
       :source:  String. Filename and line number where the item is defined.
       :value:   String. Config value.
 
     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'))
 
     selsections = selentries = []
     if values:
         selsections = [v for v in values if '.' not in v]
         selentries = [v for v in values if '.' in v]
     uniquesel = (len(selentries) == 1 and not selsections)
     selsections = set(selsections)
     selentries = set(selentries)
 
     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 and not (section in selsections or entryname in selentries):
             continue
         fm.startitem()
         fm.condwrite(ui.debugflag, 'source', '%s: ', source)
         if uniquesel:
             fm.data(name=entryname)
             fm.write('value', '%s\n', value)
         else:
             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'),
     helpcategory=command.CATEGORY_FILE_CONTENTS)
 def copy(ui, repo, *pats, **opts):
     """mark files as copied for the next commit
 
     Mark dest as having copies of source files. If dest is a
     directory, copies are put in that directory. If dest is a file,
     the source must be a single file.
 
     By default, this command copies the contents of files as they
     exist in the working directory. If invoked with -A/--after, the
     operation is recorded, but no copying is performed.
 
     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]'),
     helpcategory=command.CATEGORY_HELP,
     norepo=True)
 def debugcommands(ui, cmd='', *args):
     """list all available commands and options"""
     for cmd, vals in sorted(table.iteritems()):
         cmd = cmd.split('|')[0]
         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'),
     helpcategory=command.CATEGORY_HELP,
     norepo=True)
 def debugcomplete(ui, cmd='', **opts):
     """returns the completion list associated with the given command"""
 
     if opts.get(r'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]...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     helpbasic=True, inferrepo=True, intents={INTENT_READONLY})
 def diff(ui, repo, *pats, **opts):
     """diff repository (or selected files)
 
     Show differences between revisions for the specified files.
 
     Differences between files are shown using the unified diff format.
 
     .. note::
 
        :hg:`diff` may generate unexpected results for merges, as it will
        default to comparing against the working directory's first
        parent changeset if no revisions are specified.
 
     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:
         repo = scmutil.unhidehashlikerevs(repo, [change], 'nowarn')
         ctx2 = scmutil.revsingle(repo, change, None)
         ctx1 = ctx2.p1()
     else:
         repo = scmutil.unhidehashlikerevs(repo, revs, 'nowarn')
         ctx1, ctx2 = scmutil.revpair(repo, revs)
     node1, node2 = ctx1.node(), ctx2.node()
 
     if reverse:
         node1, node2 = node2, node1
 
     diffopts = patch.diffallopts(ui, opts)
     m = scmutil.match(ctx2, pats, opts)
     m = repo.narrowmatch(m)
     ui.pager('diff')
     logcmdutil.diffordiffstat(ui, repo, diffopts, node1, node2, m, stat=stat,
                               listsubrepos=opts.get('subrepos'),
                               root=opts.get('root'))
 
 @command('export',
     [('B', 'bookmark', '',
      _('export changes only reachable by given bookmark'), _('BOOKMARK')),
     ('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 + formatteropts,
     _('[OPTION]... [-o OUTFILESPEC] [-r] [REV]...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
     helpbasic=True, intents={INTENT_READONLY})
 def export(ui, repo, *changesets, **opts):
     """dump the header and diffs for one or more changesets
 
     Print the changeset header and diffs for one or more revisions.
     If no revision is given, the parent of the working directory is used.
 
     The information shown in the changeset header is: author, date,
     branch name (if non-default), changeset hash, parent(s) and commit
     comment.
 
     .. note::
 
        :hg:`export` may generate unexpected diff output for merge
        changesets, as it will compare the merge changeset against its
        first parent only.
 
     Output may be to a file, in which case the name of the file is
     given using a template string. See :hg:`help templates`. In addition
     to the common template keywords, the following formatting rules are
     supported:
 
     :``%%``: literal "%" character
     :``%H``: changeset hash (40 hexadecimal digits)
     :``%N``: number of patches being generated
     :``%R``: changeset revision number
     :``%b``: basename of the exporting repository
     :``%h``: short-form changeset hash (12 hexadecimal digits)
     :``%m``: first line of the commit message (only alphanumeric characters)
     :``%n``: zero-padded sequence number, starting at 1
     :``%r``: zero-padded changeset revision number
     :``\\``: literal "\\" character
 
     Without the -a/--text option, export will avoid generating diffs
     of files it detects as binary. With -a, export will generate a
     diff anyway, probably with undesirable results.
 
     With -B/--bookmark changesets reachable by the given bookmark are
     selected.
 
     Use the -g/--git option to generate diffs in the git extended diff
     format. See :hg:`help diffs` for more information.
 
     With the --switch-parent option, the diff will be against the
     second parent. It can be useful to review a merge.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :diff:    String. Diff content.
       :parents: List of strings. Parent nodes of the changeset.
 
       Examples:
 
       - use export and import to transplant a bugfix to the current
         branch::
 
           hg export -r 9353 | hg import -
 
       - export all the changesets between two revisions to a file with
         rename information::
 
           hg export --git -r 123:150 > changes.txt
 
       - split outgoing changes into a series of patches with
         descriptive names::
 
           hg export -r "outgoing()" -o "%n-%m.patch"
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     bookmark = opts.get('bookmark')
     changesets += tuple(opts.get('rev', []))
 
     if bookmark and changesets:
         raise error.Abort(_("-r and -B are mutually exclusive"))
 
     if bookmark:
         if bookmark not in repo._bookmarks:
             raise error.Abort(_("bookmark '%s' not found") % bookmark)
 
         revs = scmutil.bookmarkrevs(repo, bookmark)
     else:
         if not changesets:
             changesets = ['.']
 
         repo = scmutil.unhidehashlikerevs(repo, changesets, 'nowarn')
         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'))
 
     fntemplate = opts.get('output')
     if cmdutil.isstdiofilename(fntemplate):
         fntemplate = ''
 
     if fntemplate:
         fm = formatter.nullformatter(ui, 'export', opts)
     else:
         ui.pager('export')
         fm = ui.formatter('export', opts)
     with fm:
         cmdutil.export(repo, revs, fm, fntemplate=fntemplate,
                        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]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     intents={INTENT_READONLY})
 def files(ui, repo, *pats, **opts):
     """list tracked files
 
     Print files under Mercurial control in the working directory or
     specified revision for given files (excluding removed files).
     Files can be specified as filenames or filesets.
 
     If no files are given to match, this command prints the names
     of all files under Mercurial control.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :flags:   String. Character denoting file's symlink and executable bits.
       :path:    String. Repository-absolute path of the file.
       :size:    Integer. Size of the file in bytes.
 
       Examples:
 
       - list all files under the current directory::
 
           hg files .
 
       - shows sizes and flags for current revision::
 
           hg files -vr .
 
       - list all files named README::
 
           hg files -I "**/README"
 
       - list all binary files::
 
           hg files "set:binary()"
 
       - find files containing a regular expression::
 
           hg files "set:grep('bob')"
 
       - search tracked file contents with xargs and grep::
 
           hg files -0 | xargs -0 grep foo
 
     See :hg:`help patterns` and :hg:`help filesets` for more information
     on specifying file patterns.
 
     Returns 0 if a match is found, 1 otherwise.
 
     """
 
     opts = pycompat.byteskwargs(opts)
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
     ctx = scmutil.revsingle(repo, rev, None)
 
     end = '\n'
     if opts.get('print0'):
         end = '\0'
     fmt = '%s' + end
 
     m = scmutil.match(ctx, pats, opts)
     ui.pager('files')
     uipathfn = scmutil.getuipathfn(ctx.repo(), legacyrelativevalue=True)
     with ui.formatter('files', opts) as fm:
         return cmdutil.files(ui, ctx, m, uipathfn, fm, fmt,
                              opts.get('subrepos'))
 
 @command(
     'forget',
     [('i', 'interactive', None, _('use interactive mode')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... FILE...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True, inferrepo=True)
 def forget(ui, repo, *pats, **opts):
     """forget the specified files on the next commit
 
     Mark the specified files so they will no longer be tracked
     after the next commit.
 
     This only removes files from the current branch, not from the
     entire project history, and it does not delete them from the
     working directory.
 
     To delete the file from the working directory, see :hg:`remove`.
 
     To undo a forget before the next commit, see :hg:`add`.
 
     .. container:: verbose
 
       Examples:
 
       - forget newly-added binary files::
 
           hg forget "set:added() and binary()"
 
       - forget files that would be excluded by .hgignore::
 
           hg forget "set:hgignore()"
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     if not pats:
         raise error.Abort(_('no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     dryrun, interactive = opts.get('dry_run'), opts.get('interactive')
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     rejected = cmdutil.forget(ui, repo, m, prefix="", uipathfn=uipathfn,
                               explicitonly=False, dryrun=dryrun,
                               interactive=interactive)[0]
     return rejected and 1 or 0
 
 @command(
     'graft',
     [('r', 'rev', [], _('revisions to graft'), _('REV')),
      ('', 'base', '',
       _('base revision when doing the graft merge (ADVANCED)'), _('REV')),
      ('c', 'continue', False, _('resume interrupted graft')),
      ('', 'stop', False, _('stop interrupted graft')),
      ('', 'abort', False, _('abort interrupted graft')),
      ('e', 'edit', False, _('invoke editor on commit messages')),
      ('', 'log', None, _('append graft info to log message')),
      ('', 'no-commit', None,
       _("don't commit, just apply the changes in working directory")),
      ('f', 'force', False, _('force graft')),
      ('D', 'currentdate', False,
       _('record the current date as commit date')),
      ('U', 'currentuser', False,
       _('record the current user as committer'))]
     + commitopts2 + mergetoolopts  + dryrunopts,
     _('[OPTION]... [-r REV]... REV...'),
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT)
 def graft(ui, repo, *revs, **opts):
     '''copy changes from other branches onto the current branch
 
     This command uses Mercurial's merge logic to copy individual
     changes from other branches without merging branches in the
     history graph. This is sometimes known as 'backporting' or
     'cherry-picking'. By default, graft will copy user, date, and
     description from the source changesets.
 
     Changesets that are ancestors of the current revision, that have
     already been grafted, or that are merges will be skipped.
 
     If --log is specified, log messages will have a comment appended
     of the form::
 
       (grafted from CHANGESETHASH)
 
     If --force is specified, revisions will be grafted even if they
     are already ancestors of, or have been grafted to, the destination.
     This is useful when the revisions have since been backed out.
 
     If a graft merge results in conflicts, the graft process is
     interrupted so that the current merge can be manually resolved.
     Once all conflicts are addressed, the graft process can be
     continued with the -c/--continue option.
 
     The -c/--continue option reapplies all the earlier options.
 
     .. container:: verbose
 
       The --base option exposes more of how graft internally uses merge with a
       custom base revision. --base can be used to specify another ancestor than
       the first and only parent.
 
       The command::
 
         hg graft -r 345 --base 234
 
       is thus pretty much the same as::
 
         hg diff -r 234 -r 345 | hg import
 
       but using merge to resolve conflicts and track moved files.
 
       The result of a merge can thus be backported as a single commit by
       specifying one of the merge parents as base, and thus effectively
       grafting the changes from the other side.
 
       It is also possible to collapse multiple changesets and clean up history
       by specifying another ancestor as base, much like rebase --collapse
       --keep.
 
       The commit message can be tweaked after the fact using commit --amend .
 
       For using non-ancestors as the base to backout changes, see the backout
       command and the hidden --parent option.
 
     .. container:: verbose
 
       Examples:
 
       - copy a single change to the stable branch and edit its description::
 
           hg update stable
           hg graft --edit 9393
 
       - graft a range of changesets with one exception, updating dates::
 
           hg graft -D "2085::2093 and not 2091"
 
       - continue a graft after resolving conflicts::
 
           hg graft -c
 
       - show the source of a grafted changeset::
 
           hg log --debug -r .
 
       - show revisions sorted by date::
 
           hg log -r "sort(all(), date)"
 
       - backport the result of a merge as a single commit::
 
           hg graft -r 123 --base 123^
 
       - land a feature branch as one changeset::
 
           hg up -cr default
           hg graft -r featureX --base "ancestor('featureX', 'default')"
 
     See :hg:`help revisions` for more about specifying revisions.
 
     Returns 0 on successful completion.
     '''
     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'))
     basectx = None
     if opts.get('base'):
         basectx = scmutil.revsingle(repo, opts['base'], None)
     # a dict of data to be stored in state file
     statedata = {}
     # list of new nodes created by ongoing graft
     statedata['newnodes'] = []
 
     if opts.get('user') and opts.get('currentuser'):
         raise error.Abort(_('--user and --currentuser are mutually exclusive'))
     if opts.get('date') and opts.get('currentdate'):
         raise error.Abort(_('--date and --currentdate are mutually exclusive'))
     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" % dateutil.makedate()
 
     editor = cmdutil.getcommiteditor(editform='graft',
                                      **pycompat.strkwargs(opts))
 
     cont = False
     if opts.get('no_commit'):
         if opts.get('edit'):
             raise error.Abort(_("cannot specify --no-commit and "
                                 "--edit together"))
         if opts.get('currentuser'):
             raise error.Abort(_("cannot specify --no-commit and "
                                 "--currentuser together"))
         if opts.get('currentdate'):
             raise error.Abort(_("cannot specify --no-commit and "
                                 "--currentdate together"))
         if opts.get('log'):
             raise error.Abort(_("cannot specify --no-commit and "
                                 "--log together"))
 
     graftstate = statemod.cmdstate(repo, 'graftstate')
 
     if opts.get('stop'):
         if opts.get('continue'):
             raise error.Abort(_("cannot use '--continue' and "
                                 "'--stop' together"))
         if opts.get('abort'):
             raise error.Abort(_("cannot use '--abort' and '--stop' together"))
 
         if any((opts.get('edit'), opts.get('log'), opts.get('user'),
                 opts.get('date'), opts.get('currentdate'),
                 opts.get('currentuser'), opts.get('rev'))):
             raise error.Abort(_("cannot specify any other flag with '--stop'"))
         return _stopgraft(ui, repo, graftstate)
     elif opts.get('abort'):
         if opts.get('continue'):
             raise error.Abort(_("cannot use '--continue' and "
                                 "'--abort' together"))
         if any((opts.get('edit'), opts.get('log'), opts.get('user'),
                 opts.get('date'), opts.get('currentdate'),
                 opts.get('currentuser'), opts.get('rev'))):
             raise error.Abort(_("cannot specify any other flag with '--abort'"))
 
         return cmdutil.abortgraft(ui, repo, graftstate)
     elif opts.get('continue'):
         cont = True
         if revs:
             raise error.Abort(_("can't specify --continue and revisions"))
         # read in unfinished revisions
         if graftstate.exists():
             statedata = cmdutil.readgraftstate(repo, graftstate)
             if statedata.get('date'):
                 opts['date'] = statedata['date']
             if statedata.get('user'):
                 opts['user'] = statedata['user']
             if statedata.get('log'):
                 opts['log'] = True
             if statedata.get('no_commit'):
                 opts['no_commit'] = statedata.get('no_commit')
             nodes = statedata['nodes']
             revs = [repo[node].rev() for node in nodes]
         else:
             cmdutil.wrongtooltocontinue(repo, _('graft'))
     else:
         if not revs:
             raise error.Abort(_('no revisions specified'))
         cmdutil.checkunfinished(repo)
         cmdutil.bailifchanged(repo)
         revs = scmutil.revrange(repo, revs)
 
     skipped = set()
     if basectx is None:
         # 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
     if basectx is not None and len(revs) != 1:
         raise error.Abort(_('only one revision allowed with --base '))
 
     # Don't check in the --continue case, in effect retaining --force across
     # --continues. That's because without --force, any revisions we decided to
     # skip would have been filtered out here, so they wouldn't have made their
     # way to the graftstate. With --force, any revisions we would have otherwise
     # skipped would not have been filtered out, and if they hadn't been applied
     # already, they'd have been in the graftstate.
     if not (cont or opts.get('force')) and basectx is None:
         # check for ancestors of dest branch
         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()]
                 if r in revs:
                     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
 
     if opts.get('no_commit'):
         statedata['no_commit'] = True
     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']
             statedata['user'] = user
         date = ctx.date()
         if opts.get('date'):
             date = opts['date']
             statedata['date'] = date
         message = ctx.description()
         if opts.get('log'):
             message += '\n(grafted from %s)' % ctx.hex()
             statedata['log'] = True
 
         # we don't merge the first commit when continuing
         if not cont:
             # perform the graft merge with p1(rev) as 'ancestor'
             overrides = {('ui', 'forcemerge'): opts.get('tool', '')}
             base = ctx.p1() if basectx is None else basectx
             with ui.configoverride(overrides, 'graft'):
                 stats = mergemod.graft(repo, ctx, base, ['local', 'graft'])
             # report any conflicts
             if stats.unresolvedcount > 0:
                 # write out state for --continue
                 nodes = [repo[rev].hex() for rev in revs[pos:]]
                 statedata['nodes'] = nodes
                 stateversion = 1
                 graftstate.save(stateversion, statedata)
                 hint = _("use 'hg resolve' and 'hg graft --continue'")
                 raise error.Abort(
                     _("unresolved conflicts, can't continue"),
                     hint=hint)
         else:
             cont = False
 
         # commit if --no-commit is false
         if not opts.get('no_commit'):
             node = repo.commit(text=message, user=user, date=date, extra=extra,
                                editor=editor)
             if node is None:
                 ui.warn(
                     _('note: graft of %d:%s created no changes to commit\n') %
                     (ctx.rev(), ctx))
             # checking that newnodes exist because old state files won't have it
             elif statedata.get('newnodes') is not None:
                 statedata['newnodes'].append(node)
 
     # remove state when we complete successfully
     if not opts.get('dry_run'):
         graftstate.delete()
 
     return 0
 
 def _stopgraft(ui, repo, graftstate):
     """stop the interrupted graft"""
     if not graftstate.exists():
         raise error.Abort(_("no interrupted graft found"))
     pctx = repo['.']
     hg.updaterepo(repo, pctx.node(), overwrite=True)
     graftstate.delete()
     ui.status(_("stopped the interrupted graft\n"))
     ui.status(_("working directory is now at %s\n") % pctx.hex()[:12])
     return 0
 
+statemod.addunfinished(
+    'graft', fname='graftstate', clearable=True, stopflag=True,
+    continueflag=True, abortfunc=cmdutil.hgabortgraft,
+    cmdhint=_("use 'hg graft --continue' or 'hg graft --stop' to stop")
+)
+
 @command('grep',
     [('0', 'print0', None, _('end fields with NUL')),
     ('', 'all', None, _('print all revisions that match (DEPRECATED) ')),
     ('', 'diff', None, _('print all revisions when the term was introduced '
                          'or removed')),
     ('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')),
     ('', 'all-files', None,
      _('include all files in the changeset while grepping (EXPERIMENTAL)')),
     ('u', 'user', None, _('list the author (long with -v)')),
     ('d', 'date', None, _('list the date (short with -q)')),
     ] + formatteropts + walkopts,
     _('[OPTION]... PATTERN [FILE]...'),
     helpcategory=command.CATEGORY_FILE_CONTENTS,
     inferrepo=True,
     intents={INTENT_READONLY})
 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
     --diff 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.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :change:  String. Character denoting insertion ``+`` or removal ``-``.
                 Available if ``--diff`` is specified.
       :lineno:  Integer. Line number of the match.
       :path:    String. Repository-absolute path of the file.
       :texts:   List of text chunks.
 
       And each entry of ``{texts}`` provides the following sub-keywords.
 
       :matched: Boolean. True if the chunk matches the specified pattern.
       :text:    String. Chunk content.
 
       See :hg:`help templates.operators` for the list expansion syntax.
 
     Returns 0 if a match is found, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     diff = opts.get('all') or opts.get('diff')
     all_files = opts.get('all_files')
     if diff and opts.get('all_files'):
         raise error.Abort(_('--diff and --all-files are mutually exclusive'))
     # TODO: remove "not opts.get('rev')" if --all-files -rMULTIREV gets working
     if opts.get('all_files') is None and not opts.get('rev') and not diff:
         # experimental config: commands.grep.all-files
         opts['all_files'] = ui.configbool('commands', 'grep.all-files')
     plaingrep = opts.get('all_files') and not opts.get('rev')
     if plaingrep:
         opts['rev'] = ['wdir()']
 
     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") % pycompat.bytestr(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 == r'insert':
                 for i in pycompat.xrange(blo, bhi):
                     yield ('+', b[i])
             elif tag == r'delete':
                 for i in pycompat.xrange(alo, ahi):
                     yield ('-', a[i])
             elif tag == r'replace':
                 for i in pycompat.xrange(alo, ahi):
                     yield ('-', a[i])
                 for i in pycompat.xrange(blo, bhi):
                     yield ('+', b[i])
 
     uipathfn = scmutil.getuipathfn(repo)
     def display(fm, fn, ctx, pstates, states):
         rev = scmutil.intrev(ctx)
         if fm.isplain():
             formatuser = ui.shortuser
         else:
             formatuser = pycompat.bytestr
         if ui.quiet:
             datefmt = '%Y-%m-%d'
         else:
             datefmt = '%a %b %d %H:%M:%S %Y %1%2'
         found = False
         @util.cachefunc
         def binary():
             flog = getfile(fn)
             try:
                 return stringutil.binary(flog.read(ctx.filenode(fn)))
             except error.WdirUnsupported:
                 return ctx[fn].isbinary()
 
         fieldnamemap = {'linenumber': 'lineno'}
         if diff:
             iter = difflinestates(pstates, states)
         else:
             iter = [('', l) for l in states]
         for change, l in iter:
             fm.startitem()
             fm.context(ctx=ctx)
             fm.data(node=fm.hexfunc(scmutil.binnode(ctx)), path=fn)
             fm.plain(uipathfn(fn), label='grep.filename')
 
             cols = [
                 ('rev', '%d', rev, not plaingrep, ''),
                 ('linenumber', '%d', l.linenum, opts.get('line_number'), ''),
             ]
             if diff:
                 cols.append(
                     ('change', '%s', change, True,
                      'grep.inserted ' if change == '+' else 'grep.deleted ')
                 )
             cols.extend([
                 ('user', '%s', formatuser(ctx.user()), opts.get('user'), ''),
                 ('date', '%s', fm.formatdate(ctx.date(), datefmt),
                  opts.get('date'), ''),
             ])
             for name, fmt, data, cond, extra_label in cols:
                 if cond:
                     fm.plain(sep, label='grep.sep')
                 field = fieldnamemap.get(name, name)
                 label = extra_label + ('grep.%s' % name)
                 fm.condwrite(cond, field, fmt, data, label=label)
             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', tmpl='{text}'), 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 = set()
     revfiles = {}
     match = scmutil.match(repo[None], pats, opts)
     found = False
     follow = opts.get('follow')
 
     getrenamed = scmutil.getrenamedfn(repo)
     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
 
             copy = None
             if follow:
                 copy = getrenamed(fn, rev)
                 if copy:
                     copies.setdefault(rev, {})[fn] = copy
                     if fn in skip:
                         skip.add(copy)
             if fn in skip:
                 continue
             files.append(fn)
 
             if fn not in matches[rev]:
                 try:
                     content = flog.read(fnode)
                 except error.WdirUnsupported:
                     content = ctx[fn].data()
                 grepbody(fn, rev, content)
 
             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.add(copy)
                 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 diff and not all_files:
                     skip.add(fn)
                     if copy:
                         skip.add(copy)
         del revfiles[rev]
         # We will keep the matches dict for the duration of the window
         # clear the matches dict once the window is over
         if not revfiles:
             matches.clear()
     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]...'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     intents={INTENT_READONLY})
 def heads(ui, repo, *branchrevs, **opts):
     """show branch heads
 
     With no arguments, show all open branch heads in the repository.
     Branch heads are changesets that have no descendants on the
     same branch. They are where development generally takes place and
     are the usual targets for update and merge operations.
 
     If one or more REVs are given, only open branch heads on the
     branches associated with the specified changesets are shown. This
     means that you can use :hg:`heads .` to see the heads on the
     currently checked-out branch.
 
     If -c/--closed is specified, also show branch heads marked closed
     (see :hg:`commit --close-branch`).
 
     If STARTREV is specified, only those heads that are descendants of
     STARTREV will be displayed.
 
     If -t/--topo is specified, named branch mechanics will be ignored and only
     topological heads (changesets with no children) will be shown.
 
     Returns 0 if matching heads are found, 1 if not.
     """
 
     opts = pycompat.byteskwargs(opts)
     start = None
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
         start = scmutil.revsingle(repo, 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[r].branch()
                        for r in scmutil.revrange(repo, 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 = logcmdutil.changesetdisplayer(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)'), _('PLATFORM')),
      ],
     _('[-eck] [-s PLATFORM] [TOPIC]'),
     helpcategory=command.CATEGORY_HELP,
     norepo=True,
     intents={INTENT_READONLY})
 def help_(ui, name=None, **opts):
     """show help for a given topic or a help overview
 
     With no arguments, print a list of commands with short help messages.
 
     Given a topic, extension, or command name, print help for that
     topic.
 
     Returns 0 if successful.
     """
 
     keep = opts.get(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]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     optionalrepo=True,
     intents={INTENT_READONLY})
 def identify(ui, repo, source=None, rev=None,
              num=None, id=None, branch=None, tags=None, bookmarks=None, **opts):
     """identify the working directory or specified revision
 
     Print a summary identifying the repository state at REV using one or
     two parent hash identifiers, followed by a "+" if the working
     directory has uncommitted changes, the branch name (if not default),
     a list of tags, and a list of bookmarks.
 
     When REV is not given, print a summary of the current state of the
     repository including the working directory. Specify -r. to get information
     of the working directory parent without scanning uncommitted changes.
 
     Specifying a path to a repository root or Mercurial bundle will
     cause lookup to operate on that repository/bundle.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :dirty:   String. Character ``+`` denoting if the working directory has
                 uncommitted changes.
       :id:      String. One or two nodes, optionally followed by ``+``.
       :parents: List of strings. Parent nodes of the changeset.
 
       Examples:
 
       - generate a build identifier for the working directory::
 
           hg id --id > build-id.dat
 
       - find the revision corresponding to a tag::
 
           hg id -n -r 1.3
 
       - check the most recent revision of a remote repository::
 
           hg id -r tip https://www.mercurial-scm.org/repo/hg/
 
     See :hg:`log` for generating more information about specific revisions,
     including full hash identifiers.
 
     Returns 0 if successful.
     """
 
     opts = pycompat.byteskwargs(opts)
     if not repo and not source:
         raise error.Abort(_("there is no Mercurial repository here "
                            "(.hg not found)"))
 
     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 = fm.hexfunc(remoterev)
         if default or id:
             output = [hexrev]
         fm.data(id=hexrev)
 
         @util.cachefunc
         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)
 
         if fm.isplain():
             if bookmarks:
                 output.extend(getbms())
             elif default and not ui.quiet:
                 # multiple bookmarks for a single parent separated by '/'
                 bm = '/'.join(getbms())
                 if bm:
                     output.append(bm)
         else:
             fm.data(node=hex(remoterev))
             if bookmarks or 'bookmarks' in fm.datahint():
                 fm.data(bookmarks=fm.formatlist(getbms(), name='bookmark'))
     else:
         if rev:
             repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
         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 = [fm.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))
 
             fm.data(parents=fm.formatlist([fm.hexfunc(p.node())
                                            for p in parents], name='node'))
         else:
             hexoutput = fm.hexfunc(ctx.node())
             if default or id:
                 output = [hexoutput]
             fm.data(id=hexoutput)
 
             if num:
                 output.append(pycompat.bytestr(ctx.rev()))
             taglist = ctx.tags()
 
         if default and not ui.quiet:
             b = ctx.branch()
             if b != '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...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT)
 def import_(ui, repo, patch1=None, *patches, **opts):
     """import an ordered set of patches
 
     Import a list of patches and commit them individually (unless
     --no-commit is specified).
 
     To read a patch from standard input (stdin), use "-" as the patch
     name. If a URL is specified, the patch will be downloaded from
     there.
 
     Import first applies changes to the working directory (unless
     --bypass is specified), import will abort if there are outstanding
     changes.
 
     Use --bypass to apply and commit patches directly to the
     repository, without affecting the working directory. Without
     --exact, patches will be applied on top of the working directory
     parent revision.
 
     You can import a patch straight from a mail message. Even patches
     as attachments work (to use the body part, it must have type
     text/plain or text/x-patch). From and Subject headers of email
     message are used as default committer and commit message. All
     text/plain body parts before first diff are added to the commit
     message.
 
     If the imported patch was generated by :hg:`export`, user and
     description from patch override values from message headers and
     body. Values given on command line with -m/--message and -u/--user
     override these.
 
     If --exact is specified, import will set the working directory to
     the parent of each patch before applying it, and will abort if the
     resulting changeset has a different ID than the one recorded in
     the patch. This will guard against various ways that portable
     patch formats and mail systems might fail to transfer Mercurial
     data or metadata. See :hg:`bundle` for lossless transmission.
 
     Use --partial to ensure a changeset will be created from the patch
     even if some hunks fail to apply. Hunks that fail to apply will be
     written to a <target-file>.rej file. Conflicts can then be resolved
     by hand before :hg:`commit --amend` is run to update the created
     changeset. This flag exists to let people import patches that
     partially apply without losing the associated metadata (author,
     date, description, ...).
 
     .. note::
 
        When no hunks apply cleanly, :hg:`import --partial` will create
        an empty changeset, importing only the patch metadata.
 
     With -s/--similarity, hg will attempt to discover renames and
     copies in the patch in the same way as :hg:`addremove`.
 
     It is possible to use external patch programs to perform the patch
     by setting the ``ui.patch`` configuration option. For the default
     internal tool, the fuzz can also be configured via ``patch.fuzz``.
     See :hg:`help config` for more information about configuration
     files and how to use these options.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     .. container:: verbose
 
       Examples:
 
       - import a traditional patch from a website and detect renames::
 
           hg import -s 80 http://example.com/bugfix.patch
 
       - import a changeset from an hgweb server::
 
           hg import https://www.mercurial-scm.org/repo/hg/rev/5ca8c111e9aa
 
       - import all the patches in an Unix-style mbox::
 
           hg import incoming-patches.mbox
 
       - import patches from stdin::
 
           hg import -
 
       - attempt to exactly restore an exported changeset (not always
         possible)::
 
           hg import --exact proposed-fix.patch
 
       - use an external tool to apply a patch which is too fuzzy for
         the default internal tool.
 
           hg import --config ui.patch="patch --merge" fuzzy.patch
 
       - change the default fuzzing from 2 to a less strict 7
 
           hg import --config ui.fuzz=7 fuzz.patch
 
     Returns 0 on success, 1 on partial success (see --partial).
     """
 
     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'] = dateutil.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"]
     msgs = []
     ret = 0
 
     with 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 = lambda: repo.transaction('import')
             dsguard = util.nullcontextmanager
         else:
             lock = util.nullcontextmanager
             tr = util.nullcontextmanager
             dsguard = lambda: dirstateguard.dirstateguard(repo, 'import')
         with lock(), tr(), dsguard():
             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, sendaccept=False)
 
                 haspatch = False
                 for hunk in patch.split(patchfile):
                     with patch.extract(ui, hunk) as patchdata:
                         msg, node, rej = cmdutil.tryimportone(ui, repo,
                                                               patchdata,
                                                               parents, opts,
                                                               msgs, hg.clean)
                     if msg:
                         haspatch = True
                         ui.note(msg + '\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 msgs:
                 repo.savecommitmessage('\n* * *\n'.join(msgs))
         return ret
 
 @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]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT)
 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
     by :hg:`pull` at the time you issued this command.
 
     See pull for valid source format details.
 
     .. container:: verbose
 
       With -B/--bookmarks, the result of bookmark comparison between
       local and remote repositories is displayed. With -v/--verbose,
       status is also displayed for each bookmark like below::
 
         BM1               01234567890a added
         BM2               1234567890ab advanced
         BM3               234567890abc diverged
         BM4               34567890abcd changed
 
       The action taken locally when pulling depends on the
       status of each bookmark:
 
       :``added``: pull will create it
       :``advanced``: pull will update it
       :``diverged``: pull will create a divergent bookmark
       :``changed``: result depends on remote changesets
 
       From the point of view of pulling behavior, bookmark
       existing only in the remote repository are treated as ``added``,
       even if it is in fact locally deleted.
 
     .. container:: verbose
 
       For remote repository, using --bundle avoids downloading the
       changesets twice if the incoming is followed by a pull.
 
       Examples:
 
       - show incoming changes with patches and full description::
 
           hg incoming -vp
 
       - show incoming changes excluding merges, store a bundle::
 
           hg in -vpM --bundle incoming.hg
           hg pull incoming.hg
 
       - briefly list changes inside a bundle::
 
           hg in changes.hg -T "{desc|firstline}\\n"
 
     Returns 0 if there are incoming changes, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get('graph'):
         logcmdutil.checkunsupportedgraphflags([], opts)
         def display(other, chlist, displayer):
             revdag = logcmdutil.graphrevs(other, chlist, opts)
             logcmdutil.displaygraph(ui, repo, revdag, displayer,
                                     graphmod.asciiedges)
 
         hg._incoming(display, lambda: 1, ui, repo, source, opts, buffered=True)
         return 0
 
     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]'),
          helpcategory=command.CATEGORY_REPO_CREATION,
          helpbasic=True, 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]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY)
 def locate(ui, repo, *pats, **opts):
     """locate files matching specific patterns (DEPRECATED)
 
     Print files under Mercurial control in the working directory whose
     names match the given patterns.
 
     By default, this command searches all directories in the working
     directory. To search just the current directory and its
     subdirectories, use "--include .".
 
     If no patterns are given to match, this command prints the names
     of all files under Mercurial control in the working directory.
 
     If you want to feed the output of this command into the "xargs"
     command, use the -0 option to both this command and "xargs". This
     will avoid the problem of "xargs" treating single filenames that
     contain whitespace as multiple filenames.
 
     See :hg:`help files` for a more versatile command.
 
     Returns 0 if a match is found, 1 otherwise.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get('print0'):
         end = '\0'
     else:
         end = '\n'
     ctx = scmutil.revsingle(repo, opts.get('rev'), None)
 
     ret = 1
     m = scmutil.match(ctx, pats, opts, default='relglob',
                       badfn=lambda x, y: False)
 
     ui.pager('locate')
     if ctx.rev() is None:
         # When run on the working copy, "locate" includes removed files, so
         # we get the list of files from the dirstate.
         filesgen = sorted(repo.dirstate.matches(m))
     else:
         filesgen = ctx.matches(m)
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=bool(pats))
     for abs in filesgen:
         if opts.get('fullpath'):
             ui.write(repo.wjoin(abs), end)
         else:
             ui.write(uipathfn(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')),
     ('L', 'line-range', [],
      _('follow line range of specified file (EXPERIMENTAL)'),
      _('FILE,RANGE')),
     ('', 'removed', None, _('include revisions where files were removed')),
     ('m', 'only-merges', None,
      _('show only merges (DEPRECATED) (use -r "merge()" instead)')),
     ('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]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     helpbasic=True, inferrepo=True,
     intents={INTENT_READONLY})
 def log(ui, repo, *pats, **opts):
     """show revision history of entire repository or files
 
     Print the revision history of the specified files or the entire
     project.
 
     If no revision range is specified, the default is ``tip:0`` unless
     --follow is set, 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 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, '_' closes a branch,
     'x' is obsolete, '*' is unstable, and '+' represents a fork where the
     changeset from the lines below is a parent of the 'o' merge on the same
     line.
     Paths in the DAG are represented with '|', '/' and so forth. ':' in place
     of a '|' indicates one or more revisions in a path are omitted.
 
     .. container:: verbose
 
        Use -L/--line-range FILE,M:N options to follow the history of lines
        from M to N in FILE. With -p/--patch only diff hunks affecting
        specified line range will be shown. This option requires --follow;
        it can be specified multiple times. Currently, this option is not
        compatible with --graph. This option is experimental.
 
     .. note::
 
        :hg:`log --patch` may generate unexpected diff output for merge
        changesets, as it will only compare the merge changeset against
        its first parent. Also, only files different from BOTH parents
        will appear in files:.
 
     .. note::
 
        For performance reasons, :hg:`log FILE` may omit duplicate changes
        made on branches and will not show removals or mode changes. To
        see all such changes, use the --removed switch.
 
     .. container:: verbose
 
        .. note::
 
           The history resulting from -L/--line-range options depends on diff
           options; for instance if white-spaces are ignored, respective changes
           with only white-spaces in specified line range will not be listed.
 
     .. container:: verbose
 
       Some examples:
 
       - changesets with full descriptions and file lists::
 
           hg log -v
 
       - changesets ancestral to the working directory::
 
           hg log -f
 
       - last 10 commits on the current branch::
 
           hg log -l 10 -b .
 
       - changesets showing all modifications of a file, including removals::
 
           hg log --removed file.c
 
       - all changesets that touch a directory, with diffs, excluding merges::
 
           hg log -Mp lib/
 
       - all revision numbers that match a keyword::
 
           hg log -k bug --template "{rev}\\n"
 
       - the full hash identifier of the working directory parent::
 
           hg log -r . --template "{node}\\n"
 
       - list available log templates::
 
           hg log -T list
 
       - check if a given changeset is included in a tagged release::
 
           hg log -r "a21ccf and ancestor(1.9)"
 
       - find all changesets by some user in a date range::
 
           hg log -k alice -d "may 2008 to jul 2008"
 
       - summary of all changesets after the last tag::
 
           hg log -r "last(tagged())::" --template "{desc|firstline}\\n"
 
       - changesets touching lines 13 to 23 for file.c::
 
           hg log -L file.c,13:23
 
       - changesets touching lines 13 to 23 for file.c and lines 2 to 6 of
         main.c with patch::
 
           hg log -L file.c,13:23 -L main.c,2:6 -p
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help revisions` for more about specifying and ordering
     revisions.
 
     See :hg:`help templates` for more about pre-packaged styles and
     specifying custom templates. The default template used by the log
     command can be customized via the ``ui.logtemplate`` configuration
     setting.
 
     Returns 0 on success.
 
     """
     opts = pycompat.byteskwargs(opts)
     linerange = opts.get('line_range')
 
     if linerange and not opts.get('follow'):
         raise error.Abort(_('--line-range requires --follow'))
 
     if linerange and pats:
         # TODO: take pats as patterns with no line-range filter
         raise error.Abort(
             _('FILE arguments are not compatible with --line-range option')
         )
 
     repo = scmutil.unhidehashlikerevs(repo, opts.get('rev'), 'nowarn')
     revs, differ = logcmdutil.getrevs(repo, pats, opts)
     if linerange:
         # TODO: should follow file history from logcmdutil._initialrevs(),
         # then filter the result by logcmdutil._makerevset() and --limit
         revs, differ = logcmdutil.getlinerangerevs(repo, revs, opts)
 
     getcopies = None
     if opts.get('copies'):
         endrev = None
         if revs:
             endrev = revs.max() + 1
         getcopies = scmutil.getcopiesfn(repo, endrev=endrev)
 
     ui.pager('log')
     displayer = logcmdutil.changesetdisplayer(ui, repo, opts, differ,
                                               buffered=True)
     if opts.get('graph'):
         displayfn = logcmdutil.displaygraphrevs
     else:
         displayfn = logcmdutil.displayrevs
     displayfn(ui, repo, revs, displayer, getcopies)
 
 @command('manifest',
     [('r', 'rev', '', _('revision to display'), _('REV')),
      ('', 'all', False, _("list files from all revisions"))]
          + formatteropts,
     _('[-r REV]'),
     helpcategory=command.CATEGORY_MAINTENANCE,
     intents={INTENT_READONLY})
 def manifest(ui, repo, node=None, rev=None, **opts):
     """output the current or given revision of the project manifest
 
     Print a list of version controlled files for the given revision.
     If no revision is given, the first parent of the working directory
     is used, or the null revision if no revision is checked out.
 
     With -v, print file permissions, symlink and executable bits.
     With --debug, print file revision hashes.
 
     If option --all is specified, the list of all files from all revisions
     is printed. This includes deleted and renamed files.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     fm = ui.formatter('manifest', opts)
 
     if opts.get('all'):
         if rev or node:
             raise error.Abort(_("can't specify a revision with --all"))
 
         res = set()
         for rev in repo:
             ctx = repo[rev]
             res |= set(ctx.files())
 
         ui.pager('manifest')
         for f in sorted(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': '*', '': '', 't': 'd'}
     mode = {'l': '644', 'x': '755', '': '644', 't': '755'}
     if node:
         repo = scmutil.unhidehashlikerevs(repo, [node], 'nowarn')
     ctx = scmutil.revsingle(repo, node)
     mf = ctx.manifest()
     ui.pager('manifest')
     for f in ctx:
         fm.startitem()
         fm.context(ctx=ctx)
         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)')),
     ('', 'abort', None, _('abort the ongoing merge')),
      ] + mergetoolopts,
     _('[-P] [[-r] REV]'),
     helpcategory=command.CATEGORY_CHANGE_MANAGEMENT, helpbasic=True)
 def merge(ui, repo, node=None, **opts):
     """merge another revision into working directory
 
     The current working directory is updated with all changes made in
     the requested revision since the last common predecessor revision.
 
     Files that changed between either parent are marked as changed for
     the next commit and a commit must be performed before any further
     updates to the repository are allowed. The next commit will have
     two parents.
 
     ``--tool`` can be used to specify the merge tool used for file
     merges. It overrides the HGMERGE environment variable and your
     configuration files. See :hg:`help merge-tools` for options.
 
     If no revision is specified, the working directory's parent is a
     head revision, and the current branch contains exactly one other
     head, the other head is merged with by default. Otherwise, an
     explicit revision with which to merge must be provided.
 
     See :hg:`help resolve` for information on handling file conflicts.
 
     To undo an uncommitted merge, use :hg:`merge --abort` which
     will check out a clean copy of the original merge parent, losing
     all changes.
 
     Returns 0 on success, 1 if there are unresolved files.
     """
 
     opts = pycompat.byteskwargs(opts)
     abort = opts.get('abort')
     if abort and repo.dirstate.p2() == nullid:
         cmdutil.wrongtooltocontinue(repo, _('merge'))
     if abort:
         state = cmdutil.getunfinishedstate(repo)
         if state and state._opname != 'merge':
             raise error.Abort(_('cannot abort merge with %s in progress') %
                                 (state._opname), hint=state.hint())
         if node:
             raise error.Abort(_("cannot specify a node with --abort"))
         if opts.get('rev'):
             raise error.Abort(_("cannot specify both --rev and --abort"))
         if opts.get('preview'):
             raise error.Abort(_("cannot specify --preview with --abort"))
     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 and not abort:
         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 = node
         nodes = repo.changelog.findmissing(common=[p1], heads=[p2])
 
         displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
         for node in nodes:
             displayer.show(repo[node])
         displayer.close()
         return 0
 
     # ui.forcemerge is an internal variable, do not document
     overrides = {('ui', 'forcemerge'): opts.get('tool', '')}
     with ui.configoverride(overrides, 'merge'):
         force = opts.get('force')
         labels = ['working copy', 'merge rev']
         return hg.merge(repo, node, force=force, mergeforce=force,
                         labels=labels, abort=abort)
 
 @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]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT)
 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.
     """
     # hg._outgoing() needs to re-resolve the path in order to handle #branch
     # style URLs, so don't overwrite dest.
     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'"))
 
     opts = pycompat.byteskwargs(opts)
     if opts.get('graph'):
         logcmdutil.checkunsupportedgraphflags([], opts)
         o, other = hg._outgoing(ui, repo, dest, opts)
         if not o:
             cmdutil.outgoinghooks(ui, repo, other, opts, o)
             return
 
         revdag = logcmdutil.graphrevs(repo, o, opts)
         ui.pager('outgoing')
         displayer = logcmdutil.changesetdisplayer(ui, repo, opts, buffered=True)
         logcmdutil.displaygraph(ui, repo, revdag, displayer,
                                 graphmod.asciiedges)
         cmdutil.outgoinghooks(ui, repo, other, opts, o)
         return 0
 
     if opts.get('bookmarks'):
         dest = path.pushloc or path.loc
         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 = path.pushloc or path.loc
     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]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
     inferrepo=True)
 def parents(ui, repo, file_=None, **opts):
     """show the parents of the working directory or revision (DEPRECATED)
 
     Print the working directory's parent revisions. If a revision is
     given via -r/--rev, the parent of that revision will be printed.
     If a file argument is given, the revision in which the file was
     last changed (before the working directory revision or the
     argument to --rev if given) is printed.
 
     This command is equivalent to::
 
         hg log -r "p1()+p2()" or
         hg log -r "p1(REV)+p2(REV)" or
         hg log -r "max(::p1() and file(FILE))+max(::p2() and file(FILE))" or
         hg log -r "max(::p1(REV) and file(FILE))+max(::p2(REV) and file(FILE))"
 
     See :hg:`summary` and :hg:`help revsets` for related information.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
     ctx = scmutil.revsingle(repo, 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 = logcmdutil.changesetdisplayer(ui, repo, opts)
     for n in p:
         if n != nullid:
             displayer.show(repo[n])
     displayer.close()
 
 @command('paths', formatteropts, _('[NAME]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     optionalrepo=True, intents={INTENT_READONLY})
 def paths(ui, repo, search=None, **opts):
     """show aliases for remote repositories
 
     Show definition of symbolic path name NAME. If no name is given,
     show definition of all available names.
 
     Option -q/--quiet suppresses all output when searching for NAME
     and shows only the path names when listing all definitions.
 
     Path names are defined in the [paths] section of your
     configuration file and in ``/etc/mercurial/hgrc``. If run inside a
     repository, ``.hg/hgrc`` is used, too.
 
     The path names ``default`` and ``default-push`` have a special
     meaning.  When performing a push or pull operation, they are used
     as fallbacks if no location is specified on the command-line.
     When ``default-push`` is set, it will be used for push and
     ``default`` will be used for pull; otherwise ``default`` is used
     as the fallback for both.  When cloning a repository, the clone
     source is written as ``default`` in ``.hg/hgrc``.
 
     .. note::
 
        ``default`` and ``default-push`` apply to all inbound (e.g.
        :hg:`incoming`) and outbound (e.g. :hg:`outgoing`, :hg:`email`
        and :hg:`bundle`) operations.
 
     See :hg:`help urls` for more information.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported. See also :hg:`help templates`.
 
       :name:    String. Symbolic name of the path alias.
       :pushurl: String. URL for push operations.
       :url:     String. URL or directory path for the other operations.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     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 = bytes
     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...]'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION)
 def phase(ui, repo, *revs, **opts):
     """set or show the current phase name
 
     With no argument, show the phase name of the current revision(s).
 
     With one of -p/--public, -d/--draft or -s/--secret, change the
     phase value of the specified revisions.
 
     Unless -f/--force is specified, :hg:`phase` won't move changesets from a
     lower phase to a higher phase. Phases are ordered as follows::
 
         public < draft < secret
 
     Returns 0 on success, 1 if some phases could not be changed.
 
     (For more information about the phases concept, see :hg:`help phases`.)
     """
     opts = pycompat.byteskwargs(opts)
     # search for a unique phase argument
     targetphase = None
     for idx, name in enumerate(phases.cmdphasenames):
         if opts[name]:
             if targetphase is not None:
                 raise error.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)
 
     ret = 0
     if targetphase is None:
         # display
         for r in revs:
             ctx = repo[r]
             ui.write('%i: %s\n' % (ctx.rev(), ctx.phasestr()))
     else:
         with repo.lock(), repo.transaction("phase") as tr:
             # 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)
         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") % stringutil.forcebytestr(inst)
             hint = inst.hint
             raise error.UpdateAbort(msg, hint=hint)
     if modheads is not None and modheads > 1:
         currentbranchheads = len(repo.branchheads())
         if currentbranchheads == modheads:
             ui.status(_("(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 new descendants 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]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     helpbasic=True)
 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.
 
     When cloning from servers that support it, Mercurial may fetch
     pre-generated data. When this is done, hooks operating on incoming
     changesets and changegroups may fire more than once, once for each
     pre-generated bundle and as well as for any additional remaining
     data. See :hg:`help -e clonebundles` for more.
 
     Use :hg:`incoming` if you want to see what would have been added
     by a pull at the time you issued this command. If you then decide
     to add those changes to the repository, you should use :hg:`pull
     -r X` where ``X`` is the last changeset listed by :hg:`incoming`.
 
     If SOURCE is omitted, the 'default' path will be used.
     See :hg:`help urls` for more information.
 
     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 = {}
 
         nodes = None
         if opts.get('bookmark') or revs:
             # The list of bookmark used here is the same used to actually update
             # the bookmark names, to avoid the race from issue 4689 and we do
             # all lookup and bookmark queries in one go so they see the same
             # version of the server state (issue 4700).
             nodes = []
             fnodes = []
             revs = revs or []
             if revs and not other.capable('lookup'):
                 err = _("other repository doesn't support revision lookup, "
                         "so a rev cannot be specified.")
                 raise error.Abort(err)
             with other.commandexecutor() as e:
                 fremotebookmarks = e.callcommand('listkeys', {
                     'namespace': 'bookmarks'
                 })
                 for r in revs:
                     fnodes.append(e.callcommand('lookup', {'key': r}))
             remotebookmarks = fremotebookmarks.result()
             remotebookmarks = bookmarks.unhexlifybookmarks(remotebookmarks)
             pullopargs['remotebookmarks'] = remotebookmarks
             for b in opts.get('bookmark', []):
                 b = repo._bookmarks.expandname(b)
                 if b not in remotebookmarks:
                     raise error.Abort(_('remote bookmark %s not found!') % b)
                 nodes.append(remotebookmarks[b])
             for i, rev in enumerate(revs):
                 node = fnodes[i].result()
                 nodes.append(node)
                 if rev == checkout:
                     checkout = node
 
         wlock = util.nullcontextmanager()
         if opts.get('update'):
             wlock = repo.wlock()
         with wlock:
             pullopargs.update(opts.get('opargs', {}))
             modheads = exchange.pull(repo, other, heads=nodes,
                                      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 = repo.unfiltered().changelog.rev(checkout)
 
                 # order below depends on implementation of
                 # hg.addbranchrevs(). opts['bookmark'] is ignored,
                 # because 'checkout' is determined without it.
                 if opts.get('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)
             except error.FilteredRepoLookupError as exc:
                 msg = _('cannot update to target: %s') % exc.args[0]
                 exc.args = (msg,) + exc.args[1:]
                 raise
             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)')),
     ('', 'publish', False, _('push the changeset as public (EXPERIMENTAL)')),
     ] + remoteopts,
     _('[-f] [-r REV]... [-e CMD] [--remotecmd CMD] [DEST]'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     helpbasic=True)
 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[r].node() 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', ()),
                            publish=opts.get('publish'),
                            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',
     [('','verify', True, "run `hg verify` after succesful recover"),
     ],
     helpcategory=command.CATEGORY_MAINTENANCE)
 def recover(ui, repo, **opts):
     """roll back an interrupted transaction
 
     Recover from an interrupted commit or pull.
 
     This command tries to fix the repository status after an
     interrupted operation. It should only be necessary when Mercurial
     suggests it.
 
     Returns 0 if successful, 1 if nothing to recover or verify fails.
     """
     ret = repo.recover()
     if ret:
         if opts[r'verify']:
             return hg.verify(repo)
         else:
             msg = _("(verify step skipped, run  `hg verify` to check your "
                     "repository content)\n")
             ui.warn(msg)
             return 0
     return 1
 
 @command('remove|rm',
     [('A', 'after', None, _('record delete for missing files')),
     ('f', 'force', None,
      _('forget added files, delete modified files')),
     ] + subrepoopts + walkopts + dryrunopts,
     _('[OPTION]... FILE...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True, inferrepo=True)
 def remove(ui, repo, *pats, **opts):
     """remove the specified files on the next commit
 
     Schedule the indicated files for removal from the current branch.
 
     This command schedules the files to be removed at the next commit.
     To undo a remove before that, see :hg:`revert`. To undo added
     files, see :hg:`forget`.
 
     .. container:: verbose
 
       -A/--after can be used to remove only files that have already
       been deleted, -f/--force can be used to force deletion, and -Af
       can be used to remove files from the next revision without
       deleting them from the working directory.
 
       The following table details the behavior of remove for different
       file states (columns) and option combinations (rows). The file
       states are Added [A], Clean [C], Modified [M] and Missing [!]
       (as reported by :hg:`status`). The actions are Warn, Remove
       (from branch) and Delete (from disk):
 
       ========= == == == ==
       opt/state A  C  M  !
       ========= == == == ==
       none      W  RD W  R
       -f        R  RD RD R
       -A        W  W  W  R
       -Af       R  R  R  R
       ========= == == == ==
 
       .. note::
 
          :hg:`remove` never deletes files in Added [A] state from the
          working directory, not even if ``--force`` is specified.
 
     Returns 0 on success, 1 if any warnings encountered.
     """
 
     opts = pycompat.byteskwargs(opts)
     after, force = opts.get('after'), opts.get('force')
     dryrun = opts.get('dry_run')
     if not pats and not after:
         raise error.Abort(_('no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     subrepos = opts.get('subrepos')
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True)
     return cmdutil.remove(ui, repo, m, "", uipathfn, after, force, subrepos,
                           dryrun=dryrun)
 
 @command('rename|move|mv',
     [('A', 'after', None, _('record a rename that has already occurred')),
     ('f', 'force', None, _('forcibly move over an existing managed file')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... SOURCE... DEST'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY)
 def rename(ui, repo, *pats, **opts):
     """rename files; equivalent of copy + remove
 
     Mark dest as copies of sources; mark sources for deletion. If dest
     is a directory, copies are put in that directory. If dest is a
     file, there can only be one source.
 
     By default, this command copies the contents of files as they
     exist in the working directory. If invoked with -A/--after, the
     operation is recorded, but no copying is performed.
 
     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')),
     ('', 're-merge', None, _('re-merge files'))]
     + mergetoolopts + walkopts + formatteropts,
     _('[OPTION]... [FILE]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     inferrepo=True)
 def resolve(ui, repo, *pats, **opts):
     """redo merges or set/view the merge status of files
 
     Merges with unresolved conflicts are often the result of
     non-interactive merging using the ``internal:merge`` configuration
     setting, or a command-line merge tool like ``diff3``. The resolve
     command is used to manage the files involved in a merge, after
     :hg:`merge` has been run, and before :hg:`commit` is run (i.e. the
     working directory must have two parents). See :hg:`help
     merge-tools` for information on configuring merge tools.
 
     The resolve command can be used in the following ways:
 
     - :hg:`resolve [--re-merge] [--tool TOOL] FILE...`: attempt to re-merge
       the specified files, discarding any previous merge attempts. Re-merging
       is not performed for files already marked as resolved. Use ``--all/-a``
       to select all unresolved files. ``--tool`` can be used to specify
       the merge tool used for the given files. It overrides the HGMERGE
       environment variable and your configuration files.  Previous file
       contents are saved with a ``.orig`` suffix.
 
     - :hg:`resolve -m [FILE]`: mark a file as having been resolved
       (e.g. after having manually fixed-up the files). The default is
       to mark all unresolved files.
 
     - :hg:`resolve -u [FILE]...`: mark a file as unresolved. The
       default is to mark all resolved files.
 
     - :hg:`resolve -l`: list files which had or still have conflicts.
       In the printed list, ``U`` = unresolved and ``R`` = resolved.
       You can use ``set:unresolved()`` or ``set:resolved()`` to filter
       the list. See :hg:`help filesets` for details.
 
     .. note::
 
        Mercurial will not let you commit files with unresolved merge
        conflicts. You must use :hg:`resolve -m ...` before you can
        commit after a conflicting merge.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :mergestatus: String. Character denoting merge conflicts, ``U`` or ``R``.
       :path:    String. Repository-absolute path of the file.
 
     Returns 0 on success, 1 if any files fail a resolve attempt.
     """
 
     opts = pycompat.byteskwargs(opts)
     confirm = ui.configbool('commands', 'resolve.confirm')
     flaglist = 'all mark unmark list no_status re_merge'.split()
     all, mark, unmark, show, nostatus, remerge = [
         opts.get(o) for o in flaglist]
 
     actioncount = len(list(filter(None, [show, mark, unmark, remerge])))
     if actioncount > 1:
         raise error.Abort(_("too many actions specified"))
     elif (actioncount == 0
           and ui.configbool('commands', 'resolve.explicit-re-merge')):
         hint = _('use --mark, --unmark, --list or --re-merge')
         raise error.Abort(_('no action specified'), hint=hint)
     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 confirm:
         if all:
             if ui.promptchoice(_(b're-merge all unresolved files (yn)?'
                                  b'$$ &Yes $$ &No')):
                 raise error.Abort(_('user quit'))
         if mark and not pats:
             if ui.promptchoice(_(b'mark all unresolved files as resolved (yn)?'
                                  b'$$ &Yes $$ &No')):
                 raise error.Abort(_('user quit'))
         if unmark and not pats:
             if ui.promptchoice(_(b'mark all resolved files as unresolved (yn)?'
                                  b'$$ &Yes $$ &No')):
                 raise error.Abort(_('user quit'))
 
     uipathfn = scmutil.getuipathfn(repo)
 
     if show:
         ui.pager('resolve')
         fm = ui.formatter('resolve', opts)
         ms = mergemod.mergestate.read(repo)
         wctx = repo[None]
         m = scmutil.match(wctx, pats, opts)
 
         # Labels and keys based on merge state.  Unresolved path conflicts show
         # as 'P'.  Resolved path conflicts show as 'R', the same as normal
         # resolved conflicts.
         mergestateinfo = {
             mergemod.MERGE_RECORD_UNRESOLVED: ('resolve.unresolved', 'U'),
             mergemod.MERGE_RECORD_RESOLVED: ('resolve.resolved', 'R'),
             mergemod.MERGE_RECORD_UNRESOLVED_PATH: ('resolve.unresolved', 'P'),
             mergemod.MERGE_RECORD_RESOLVED_PATH: ('resolve.resolved', 'R'),
             mergemod.MERGE_RECORD_DRIVER_RESOLVED: ('resolve.driverresolved',
                                                     'D'),
         }
 
         for f in ms:
             if not m(f):
                 continue
 
             label, key = mergestateinfo[ms[f]]
             fm.startitem()
             fm.context(ctx=wctx)
             fm.condwrite(not nostatus, 'mergestatus', '%s ', key, label=label)
             fm.data(path=f)
             fm.plain('%s\n' % uipathfn(f), label=label)
         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() == mergemod.MERGE_DRIVER_STATE_UNMARKED):
             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 = []
         hasconflictmarkers = []
         if mark:
             markcheck = ui.config('commands', 'resolve.mark-check')
             if markcheck not in ['warn', 'abort']:
                 # Treat all invalid / unrecognized values as 'none'.
                 markcheck = False
         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] == mergemod.MERGE_RECORD_DRIVER_RESOLVED:
                 exact = m.exact(f)
                 if mark:
                     if exact:
                         ui.warn(_('not marking %s as it is driver-resolved\n')
                                 % uipathfn(f))
                 elif unmark:
                     if exact:
                         ui.warn(_('not unmarking %s as it is driver-resolved\n')
                                 % uipathfn(f))
                 else:
                     runconclude = True
                 continue
 
             # path conflicts must be resolved manually
             if ms[f] in (mergemod.MERGE_RECORD_UNRESOLVED_PATH,
                          mergemod.MERGE_RECORD_RESOLVED_PATH):
                 if mark:
                     ms.mark(f, mergemod.MERGE_RECORD_RESOLVED_PATH)
                 elif unmark:
                     ms.mark(f, mergemod.MERGE_RECORD_UNRESOLVED_PATH)
                 elif ms[f] == mergemod.MERGE_RECORD_UNRESOLVED_PATH:
                     ui.warn(_('%s: path conflict must be resolved manually\n')
                             % uipathfn(f))
                 continue
 
             if mark:
                 if markcheck:
                     fdata = repo.wvfs.tryread(f)
                     if (filemerge.hasconflictmarkers(fdata) and
                         ms[f] != mergemod.MERGE_RECORD_RESOLVED):
                         hasconflictmarkers.append(f)
                 ms.mark(f, mergemod.MERGE_RECORD_RESOLVED)
             elif unmark:
                 ms.mark(f, mergemod.MERGE_RECORD_UNRESOLVED)
             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
                     overrides = {('ui', 'forcemerge'): opts.get('tool', '')}
                     with ui.configoverride(overrides, 'resolve'):
                         complete, r = ms.preresolve(f, wctx)
                     if not complete:
                         tocomplete.append(f)
                     elif r:
                         ret = 1
                 finally:
                     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.backuppath(ui, repo, f))
                     except OSError as inst:
                         if inst.errno != errno.ENOENT:
                             raise
 
         if hasconflictmarkers:
             ui.warn(_('warning: the following files still have conflict '
                       'markers:\n') + ''.join('  ' + uipathfn(f) + '\n'
                                               for f in hasconflictmarkers))
             if markcheck == 'abort' and not all and not pats:
                 raise error.Abort(_('conflict markers detected'),
                                   hint=_('use --all to mark anyway'))
 
         for f in tocomplete:
             try:
                 # resolve file
                 overrides = {('ui', 'forcemerge'): opts.get('tool', '')}
                 with ui.configoverride(overrides, 'resolve'):
                     r = ms.resolve(f, wctx)
                 if r:
                     ret = 1
             finally:
                 ms.commit()
 
             # replace filemerge's .orig file with our resolve file
             a = repo.wjoin(f)
             try:
                 util.rename(a + ".resolve", scmutil.backuppath(ui, repo, f))
             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
                     def flag(o):
                         if o == 're_merge':
                             return '--re-merge '
                         return '-%s ' % o[0:1]
                     flags = ''.join([flag(o) 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')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... [-r REV] [NAME]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY)
 def revert(ui, repo, *pats, **opts):
     """restore files to their checkout state
 
     .. note::
 
        To check out earlier revisions, you should use :hg:`update REV`.
        To cancel an uncommitted merge (and lose your changes),
        use :hg:`merge --abort`.
 
     With no revision specified, revert the specified files or directories
     to the contents they had in the parent of the working directory.
     This restores the contents of files to an unmodified
     state and unschedules adds, removes, copies, and renames. If the
     working directory has two parents, you must explicitly specify a
     revision.
 
     Using the -r/--rev or -d/--date options, revert the given files or
     directories to their states as of a specific revision. Because
     revert does not change the working directory parents, this will
     cause these files to appear modified. This can be helpful to "back
     out" some or all of an earlier change. See :hg:`backout` for a
     related method.
 
     Modified files are saved with a .orig suffix before reverting.
     To disable these backups, use --no-backup. It is possible to store
     the backup files in a custom directory relative to the root of the
     repository by setting the ``ui.origbackuppath`` configuration
     option.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help backout` for a way to reverse the effect of an
     earlier changeset.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     if opts.get("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'"))
 
     rev = opts.get('rev')
     if rev:
         repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
     ctx = scmutil.revsingle(repo, 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 %d' to update") % ctx.rev()
             else:
                 hint = _("use --all to revert all files,"
                          " or 'hg update %d' 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,
                           **pycompat.strkwargs(opts))
 
 @command(
     'rollback',
     dryrunopts + [('f', 'force', False, _('ignore safety measures'))],
     helpcategory=command.CATEGORY_MAINTENANCE)
 def rollback(ui, repo, **opts):
     """roll back the last transaction (DANGEROUS) (DEPRECATED)
 
     Please use :hg:`commit --amend` instead of rollback to correct
     mistakes in the last commit.
 
     This command should be used with care. There is only one level of
     rollback, and there is no way to undo a rollback. It will also
     restore the dirstate at the time of the last transaction, losing
     any dirstate changes since that time. This command does not alter
     the working directory.
 
     Transactions are used to encapsulate the effects of all commands
     that create new changesets or propagate existing changesets into a
     repository.
 
     .. container:: verbose
 
       For example, the following commands are transactional, and their
       effects can be rolled back:
 
       - commit
       - import
       - pull
       - push (with this repository as the destination)
       - unbundle
 
       To avoid permanent data loss, rollback will refuse to rollback a
       commit transaction if it isn't checked out. Use --force to
       override this protection.
 
       The rollback command can be entirely disabled by setting the
       ``ui.rollback`` configuration setting to false. If you're here
       because you want to use rollback and it's disabled, you can
       re-enable the command by setting ``ui.rollback`` to true.
 
     This command is not intended for use on public repositories. Once
     changes are visible for pull by other users, rolling a transaction
     back locally is ineffective (someone else may already have pulled
     the changes). Furthermore, a race is possible with readers of the
     repository; for example an in-progress pull from the repository
     may fail if a rollback is performed.
 
     Returns 0 on success, 1 if no rollback data is available.
     """
     if not ui.configbool('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', [] + formatteropts, intents={INTENT_READONLY},
     helpcategory=command.CATEGORY_WORKING_DIRECTORY)
 def root(ui, repo, **opts):
     """print the root (top) of the current working directory
 
     Print the root directory of the current repository.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :hgpath:    String. Path to the .hg directory.
       :storepath: String. Path to the directory holding versioned data.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     with ui.formatter('root', opts) as fm:
         fm.startitem()
         fm.write('reporoot', '%s\n', repo.root)
         fm.data(hgpath=repo.path, storepath=repo.spath)
 
 @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')),
     ('', 'print-url', None, _('start and print only the URL'))]
      + subrepoopts,
     _('[OPTION]...'),
     helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT,
     helpbasic=True, optionalrepo=True)
 def serve(ui, repo, **opts):
     """start stand-alone webserver
 
     Start a local HTTP repository browser and pull server. You can use
     this for ad-hoc sharing and browsing of repositories. It is
     recommended to use a real web server to serve a repository for
     longer periods of time.
 
     Please note that the server does not implement access control.
     This means that, by default, anybody can read from the server and
     nobody can write to it by default. Set the ``web.allow-push``
     option to ``*`` to allow everybody to push to the server. You
     should use a real web server if you need to authenticate users.
 
     By default, the server logs accesses to stdout and errors to
     stderr. Use the -A/--accesslog and -E/--errorlog options to log to
     files.
 
     To have the server choose a free port number to listen on, specify
     a port number of 0; in this case, the server will print the port
     number it uses.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     if opts["stdio"] and opts["cmdserver"]:
         raise error.Abort(_("cannot use --stdio with --cmdserver"))
     if opts["print_url"] and ui.verbose:
         raise error.Abort(_("cannot use --print-url with --verbose"))
 
     if opts["stdio"]:
         if repo is None:
             raise error.RepoError(_("there is no Mercurial repository here"
                                     " (.hg not found)"))
         s = wireprotoserver.sshserver(ui, repo)
         s.serve_forever()
 
     service = server.createservice(ui, repo, opts)
     return server.runservice(opts, initfn=service.init, runfn=service.run)
 
 @command('shelve',
          [('A', 'addremove', None,
            _('mark new/missing files as added/removed before shelving')),
           ('u', 'unknown', None,
            _('store unknown files in the shelve')),
           ('', 'cleanup', None,
            _('delete all shelved changes')),
           ('', 'date', '',
            _('shelve with the specified commit date'), _('DATE')),
           ('d', 'delete', None,
            _('delete the named shelved change(s)')),
           ('e', 'edit', False,
            _('invoke editor on commit messages')),
           ('k', 'keep', False,
            _('shelve, but keep changes in the working directory')),
           ('l', 'list', None,
            _('list current shelves')),
           ('m', 'message', '',
            _('use text as shelve message'), _('TEXT')),
           ('n', 'name', '',
            _('use the given name for the shelved commit'), _('NAME')),
           ('p', 'patch', None,
            _('output patches for changes (provide the names of the shelved '
              'changes as positional arguments)')),
           ('i', 'interactive', None,
            _('interactive mode, only works while creating a shelve')),
           ('', 'stat', None,
            _('output diffstat-style summary of changes (provide the names of '
              'the shelved changes as positional arguments)')
            )] + cmdutil.walkopts,
          _('hg shelve [OPTION]... [FILE]...'),
          helpcategory=command.CATEGORY_WORKING_DIRECTORY)
 def shelve(ui, repo, *pats, **opts):
     '''save and set aside changes from the working directory
 
     Shelving takes files that "hg status" reports as not clean, saves
     the modifications to a bundle (a shelved change), and reverts the
     files so that their state in the working directory becomes clean.
 
     To restore these changes to the working directory, using "hg
     unshelve"; this will work even if you switch to a different
     commit.
 
     When no files are specified, "hg shelve" saves all not-clean
     files. If specific files or directories are named, only changes to
     those files are shelved.
 
     In bare shelve (when no files are specified, without interactive,
     include and exclude option), shelving remembers information if the
     working directory was on newly created branch, in other words working
     directory was on different branch than its first parent. In this
     situation unshelving restores branch information to the working directory.
 
     Each shelved change has a name that makes it easier to find later.
     The name of a shelved change defaults to being based on the active
     bookmark, or if there is no active bookmark, the current named
     branch.  To specify a different name, use ``--name``.
 
     To see a list of existing shelved changes, use the ``--list``
     option. For each shelved change, this will print its name, age,
     and description; use ``--patch`` or ``--stat`` for more details.
 
     To delete specific shelved changes, use ``--delete``. To delete
     all shelved changes, use ``--cleanup``.
     '''
     opts = pycompat.byteskwargs(opts)
     allowables = [
         ('addremove', {'create'}), # 'create' is pseudo action
         ('unknown', {'create'}),
         ('cleanup', {'cleanup'}),
 #       ('date', {'create'}), # ignored for passing '--date "0 0"' in tests
         ('delete', {'delete'}),
         ('edit', {'create'}),
         ('keep', {'create'}),
         ('list', {'list'}),
         ('message', {'create'}),
         ('name', {'create'}),
         ('patch', {'patch', 'list'}),
         ('stat', {'stat', 'list'}),
     ]
     def checkopt(opt):
         if opts.get(opt):
             for i, allowable in allowables:
                 if opts[i] and opt not in allowable:
                     raise error.Abort(_("options '--%s' and '--%s' may not be "
                                        "used together") % (opt, i))
             return True
     if checkopt('cleanup'):
         if pats:
             raise error.Abort(_("cannot specify names when using '--cleanup'"))
         return shelvemod.cleanupcmd(ui, repo)
     elif checkopt('delete'):
         return shelvemod.deletecmd(ui, repo, pats)
     elif checkopt('list'):
         return shelvemod.listcmd(ui, repo, pats, opts)
     elif checkopt('patch') or checkopt('stat'):
         return shelvemod.patchcmds(ui, repo, pats, opts)
     else:
         return shelvemod.createcmd(ui, repo, pats, opts)
 
 _NOTTERSE = 'nothing'
 
 @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', _NOTTERSE, _('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]...'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True, inferrepo=True,
     intents={INTENT_READONLY})
 def status(ui, repo, *pats, **opts):
     """show changed files in the working directory
 
     Show status of files in the repository. If names are given, only
     files that match are shown. Files that are clean or ignored or
     the source of a copy/move operation, are not listed unless
     -c/--clean, -i/--ignored, -C/--copies or -A/--all are given.
     Unless options described with "show only ..." are given, the
     options -mardu are used.
 
     Option -q/--quiet hides untracked (unknown and ignored) files
     unless explicitly requested with -u/--unknown or -i/--ignored.
 
     .. note::
 
        :hg:`status` may appear to disagree with diff if permissions have
        changed or a merge has occurred. The standard diff format does
        not report permission changes and diff only reports changes
        relative to one merge parent.
 
     If one revision is given, it is used as the base revision.
     If two revisions are given, the differences between them are
     shown. The --change option can also be used as a shortcut to list
     the changed files of a revision from its first parent.
 
     The codes used to show the status of files are::
 
       M = modified
       A = added
       R = removed
       C = clean
       ! = missing (deleted by non-hg command, but still tracked)
       ? = not tracked
       I = ignored
         = origin of the previous file (with --copies)
 
     .. container:: verbose
 
       The -t/--terse option abbreviates the output by showing only the directory
       name if all the files in it share the same status. The option takes an
       argument indicating the statuses to abbreviate: 'm' for 'modified', 'a'
       for 'added', 'r' for 'removed', 'd' for 'deleted', 'u' for 'unknown', 'i'
       for 'ignored' and 'c' for clean.
 
       It abbreviates only those statuses which are passed. Note that clean and
       ignored files are not displayed with '--terse ic' unless the -c/--clean
       and -i/--ignored options are also used.
 
       The -v/--verbose option shows information when the repository is in an
       unfinished merge, shelve, rebase state etc. You can have this behavior
       turned on by default by enabling the ``commands.status.verbose`` option.
 
       You can skip displaying some of these states by setting
       ``commands.status.skipstates`` to one or more of: 'bisect', 'graft',
       'histedit', 'merge', 'rebase', or 'unshelve'.
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions. See also :hg:`help templates`.
 
       :path:    String. Repository-absolute path of the file.
       :source:  String. Repository-absolute path of the file originated from.
                 Available if ``--copies`` is specified.
       :status:  String. Character denoting file's status.
 
       Examples:
 
       - show changes in the working directory relative to a
         changeset::
 
           hg status --rev 9353
 
       - show changes in the working directory relative to the
         current directory (see :hg:`help patterns` for more information)::
 
           hg status re:
 
       - show all changes including copies in an existing changeset::
 
           hg status --copies --change 9353
 
       - get a NUL separated list of added files, suitable for xargs::
 
           hg status -an0
 
       - show more information about the repository status, abbreviating
         added, removed, modified, deleted, and untracked paths::
 
           hg status -v -t mardu
 
     Returns 0 on success.
 
     """
 
     opts = pycompat.byteskwargs(opts)
     revs = opts.get('rev')
     change = opts.get('change')
     terse = opts.get('terse')
     if terse is _NOTTERSE:
         if revs:
             terse = ''
         else:
             terse = ui.config('commands', 'status.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:
         repo = scmutil.unhidehashlikerevs(repo, [change], 'nowarn')
         ctx2 = scmutil.revsingle(repo, change, None)
         ctx1 = ctx2.p1()
     else:
         repo = scmutil.unhidehashlikerevs(repo, revs, 'nowarn')
         ctx1, ctx2 = scmutil.revpair(repo, revs)
 
     forcerelativevalue = None
     if ui.hasconfig('commands', 'status.relative'):
         forcerelativevalue = ui.configbool('commands', 'status.relative')
     uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=bool(pats),
                                    forcerelativevalue=forcerelativevalue)
 
     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(ctx2, pats, opts)
     if terse:
         # we need to compute clean and unknown to terse
         stat = repo.status(ctx1.node(), ctx2.node(), m,
                            'ignored' in show or 'i' in terse,
                             clean=True, unknown=True,
                             listsubrepos=opts.get('subrepos'))
 
         stat = cmdutil.tersedir(stat, terse)
     else:
         stat = repo.status(ctx1.node(), ctx2.node(), m,
                            'ignored' in show, 'clean' in show,
                            'unknown' in show, opts.get('subrepos'))
 
     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(ctx1, ctx2, 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.context(ctx=ctx2)
                 fm.data(path=f)
                 fm.condwrite(showchar, 'status', '%s ', char, label=label)
                 fm.plain(fmt % uipathfn(f), label=label)
                 if f in copy:
                     fm.data(source=copy[f])
                     fm.plain(('  %s' + end) % uipathfn(copy[f]),
                              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]',
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True,
     intents={INTENT_READONLY})
 def summary(ui, repo, **opts):
     """summarize working directory state
 
     This generates a brief summary of the working directory state,
     including parents, branch, commit status, phase and available updates.
 
     With the --remote option, this will check the default paths for
     incoming and outgoing changes. This can be time-consuming.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager('summary')
     ctx = repo[None]
     parents = ctx.parents()
     pnode = parents[0].node()
     marks = []
 
     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=logcmdutil.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...'),
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION)
 def tag(ui, repo, name1, *names, **opts):
     """add one or more tags for the current or given revision
 
     Name a particular revision using <name>.
 
     Tags are used to name particular revisions of the repository and are
     very useful to compare different revisions, to go back to significant
     earlier versions or to mark branch points as releases, etc. Changing
     an existing tag is normally disallowed; use -f/--force to override.
 
     If no revision is given, the parent of the working directory is
     used.
 
     To facilitate version control, distribution, and merging of tags,
     they are stored as a file named ".hgtags" which is managed similarly
     to other project files and can be hand-edited if necessary. This
     also means that tagging creates a new commit. The file
     ".hg/localtags" is used for local tags (not shared among
     repositories).
 
     Tag commits are usually made at the head of a branch. If the parent
     of the working directory is not a branch head, :hg:`tag` aborts; use
     -f/--force to force the tag commit to be based on a non-head
     changeset.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Since tag names have priority over branch names during revision
     lookup, using an existing branch name as a tag name is discouraged.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     with repo.wlock(), 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 repo.tagtype(n) == 'global':
                     alltags = tagsmod.findglobaltags(ui, repo)
                     if alltags[n][0] == nullid:
                         raise error.Abort(_("tag '%s' is already removed") % n)
                 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)'))
         node = scmutil.revsingle(repo, rev_).node()
 
         if not message:
             # we don't translate commit messages
             message = ('Added tag %s for changeset %s' %
                        (', '.join(names), short(node)))
 
         date = opts.get('date')
         if date:
             date = dateutil.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, node, message, opts.get('local'),
                     opts.get('user'), date, editor=editor)
 
 @command(
     'tags', formatteropts, '',
     helpcategory=command.CATEGORY_CHANGE_ORGANIZATION,
     intents={INTENT_READONLY})
 def tags(ui, repo, **opts):
     """list repository tags
 
     This lists both regular and local tags. When the -v/--verbose
     switch is used, a third column "local" is printed for local tags.
     When the -q/--quiet switch is used, only the tag name is printed.
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported in addition to the common template
       keywords and functions such as ``{tag}``. See also
       :hg:`help templates`.
 
       :type:    String. ``local`` for local tags.
 
     Returns 0 on success.
     """
 
     opts = pycompat.byteskwargs(opts)
     ui.pager('tags')
     fm = ui.formatter('tags', opts)
     hexfunc = fm.hexfunc
 
     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.context(repo=repo)
         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]'),
     helpcategory=command.CATEGORY_CHANGE_NAVIGATION)
 def tip(ui, repo, **opts):
     """show the tip revision (DEPRECATED)
 
     The tip revision (usually just called the tip) is the changeset
     most recently added to the repository (and therefore the most
     recently changed head).
 
     If you have just made a commit, that commit will be the tip. If
     you have just pulled changes from another repository, the tip of
     that repository becomes the current tip. The "tip" tag is special
     and cannot be renamed or assigned to a different changeset.
 
     This command is deprecated, please use :hg:`heads` instead.
 
     Returns 0 on success.
     """
     opts = pycompat.byteskwargs(opts)
     displayer = logcmdutil.changesetdisplayer(ui, repo, opts)
     displayer.show(repo['tip'])
     displayer.close()
 
 @command('unbundle',
     [('u', 'update', None,
      _('update to new branch head if changesets were unbundled'))],
     _('[-u] FILE...'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT)
 def unbundle(ui, repo, fname1, *fnames, **opts):
     """apply one or more bundle files
 
     Apply one or more bundle files generated by :hg:`bundle`.
 
     Returns 0 on success, 1 if an update has unresolved files.
     """
     fnames = (fname1,) + fnames
 
     with repo.lock():
         for fname in fnames:
             f = hg.openpath(ui, fname)
             gen = exchange.readbundle(ui, f, fname)
             if isinstance(gen, streamclone.streamcloneapplier):
                 raise error.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('unshelve',
          [('a', 'abort', None,
            _('abort an incomplete unshelve operation')),
           ('c', 'continue', None,
            _('continue an incomplete unshelve operation')),
           ('k', 'keep', None,
            _('keep shelve after unshelving')),
           ('n', 'name', '',
            _('restore shelved change with given name'), _('NAME')),
           ('t', 'tool', '', _('specify merge tool')),
           ('', 'date', '',
            _('set date for temporary commits (DEPRECATED)'), _('DATE'))],
          _('hg unshelve [[-n] SHELVED]'),
          helpcategory=command.CATEGORY_WORKING_DIRECTORY)
 def unshelve(ui, repo, *shelved, **opts):
     """restore a shelved change to the working directory
 
     This command accepts an optional name of a shelved change to
     restore. If none is given, the most recent shelved change is used.
 
     If a shelved change is applied successfully, the bundle that
     contains the shelved changes is moved to a backup location
     (.hg/shelve-backup).
 
     Since you can restore a shelved change on top of an arbitrary
     commit, it is possible that unshelving will result in a conflict
     between your changes and the commits you are unshelving onto. If
     this occurs, you must resolve the conflict, then use
     ``--continue`` to complete the unshelve operation. (The bundle
     will not be moved until you successfully complete the unshelve.)
 
     (Alternatively, you can use ``--abort`` to abandon an unshelve
     that causes a conflict. This reverts the unshelved changes, and
     leaves the bundle in place.)
 
     If bare shelved change (when no files are specified, without interactive,
     include and exclude option) was done on newly created branch it would
     restore branch information to the working directory.
 
     After a successful unshelve, the shelved changes are stored in a
     backup directory. Only the N most recent backups are kept. N
     defaults to 10 but can be overridden using the ``shelve.maxbackups``
     configuration option.
 
     .. container:: verbose
 
        Timestamp in seconds is used to decide order of backups. More
        than ``maxbackups`` backups are kept, if same timestamp
        prevents from deciding exact order of them, for safety.
     """
     with repo.wlock():
         return shelvemod.dounshelve(ui, repo, *shelved, **opts)
 
 @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]'),
     helpcategory=command.CATEGORY_WORKING_DIRECTORY,
     helpbasic=True)
 def update(ui, repo, node=None, **opts):
     """update working directory (or switch revisions)
 
     Update the repository's working directory to the specified
     changeset. If no changeset is specified, update to the tip of the
     current named branch and move the active bookmark (see :hg:`help
     bookmarks`).
 
     Update sets the working directory's parent revision to the specified
     changeset (see :hg:`help parents`).
 
     If the changeset is not a descendant or ancestor of the working
     directory's parent and there are uncommitted changes, the update is
     aborted. With the -c/--check option, the working directory is checked
     for uncommitted changes; if none are found, the working directory is
     updated to the specified changeset.
 
     .. container:: verbose
 
       The -C/--clean, -c/--check, and -m/--merge options control what
       happens if the working directory contains uncommitted changes.
       At most of one of them can be specified.
 
       1. If no option is specified, and if
          the requested changeset is an ancestor or descendant of
          the working directory's parent, the uncommitted changes
          are merged into the requested changeset and the merged
          result is left uncommitted. If the requested changeset is
          not an ancestor or descendant (that is, it is on another
          branch), the update is aborted and the uncommitted changes
          are preserved.
 
       2. With the -m/--merge option, the update is allowed even if the
          requested changeset is not an ancestor or descendant of
          the working directory's parent.
 
       3. With the -c/--check option, the update is aborted and the
          uncommitted changes are preserved.
 
       4. With the -C/--clean option, uncommitted changes are discarded and
          the working directory is updated to the requested changeset.
 
     To cancel an uncommitted merge (and lose your changes), use
     :hg:`merge --abort`.
 
     Use null as the changeset to remove the working directory (like
     :hg:`clone -U`).
 
     If you want to revert just one file to an older revision, use
     :hg:`revert [-r REV] NAME`.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success, 1 if there are unresolved files.
     """
     rev = opts.get(r'rev')
     date = opts.get(r'date')
     clean = opts.get(r'clean')
     check = opts.get(r'check')
     merge = opts.get(r'merge')
     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
         if rev:
             repo = scmutil.unhidehashlikerevs(repo, [rev], 'nowarn')
         ctx = scmutil.revsingle(repo, rev, default=None)
         rev = ctx.rev()
         hidden = ctx.hidden()
         overrides = {('ui', 'forcemerge'): opts.get(r'tool', '')}
         with ui.configoverride(overrides, 'update'):
             ret = hg.updatetotally(ui, repo, rev, brev, clean=clean,
                                    updatecheck=updatecheck)
         if hidden:
             ctxstr = ctx.hex()[:12]
             ui.warn(_("updated to hidden changeset %s\n") % ctxstr)
 
             if ctx.obsolete():
                 obsfatemsg = obsutil._getfilteredreason(repo, ctxstr, ctx)
                 ui.warn("(%s)\n" % obsfatemsg)
         return ret
 
 @command('verify',
          [('', 'full', False, 'perform more checks (EXPERIMENTAL)')],
          helpcategory=command.CATEGORY_MAINTENANCE)
 def verify(ui, repo, **opts):
     """verify the integrity of the repository
 
     Verify the integrity of the current repository.
 
     This will perform an extensive check of the repository's
     integrity, validating the hashes and checksums of each entry in
     the changelog, manifest, and tracked files, as well as the
     integrity of their crosslinks and indices.
 
     Please see https://mercurial-scm.org/wiki/RepositoryCorruption
     for more information about recovery from corruption of the
     repository.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     opts = pycompat.byteskwargs(opts)
 
     level = None
     if opts['full']:
         level = verifymod.VERIFY_FULL
     return hg.verify(repo, level)
 
 @command(
     'version', [] + formatteropts, helpcategory=command.CATEGORY_HELP,
     norepo=True, intents={INTENT_READONLY})
 def version_(ui, **opts):
     """output version and copyright information
 
     .. container:: verbose
 
       Template:
 
       The following keywords are supported. See also :hg:`help templates`.
 
       :extensions: List of extensions.
       :ver:     String. Version number.
 
       And each entry of ``{extensions}`` provides the following sub-keywords
       in addition to ``{ver}``.
 
       :bundled: Boolean. True if included in the release.
       :name:    String. Extension name.
     """
     opts = pycompat.byteskwargs(opts)
     if ui.verbose:
         ui.pager('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) 2005-2019 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", tmpl='{name}\n')
     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/state.py

@@ -1,232 +1,227 b''
 # state.py - writing and reading state files in Mercurial
 #
 # Copyright 2018 Pulkit Goyal <[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.
 
 """
 This file contains class to wrap the state for commands and other
 related logic.
 
 All the data related to the command state is stored as dictionary in the object.
 The class has methods using which the data can be stored to disk in a file under
 .hg/ directory.
 
 We store the data on disk in cbor, for which we use the CBOR format to encode
 the data.
 """
 
 from __future__ import absolute_import
 
 from .i18n import _
 
 from . import (
     error,
     util,
 )
 from .utils import (
     cborutil,
 )
 
 class cmdstate(object):
     """a wrapper class to store the state of commands like `rebase`, `graft`,
     `histedit`, `shelve` etc. Extensions can also use this to write state files.
 
     All the data for the state is stored in the form of key-value pairs in a
     dictionary.
 
     The class object can write all the data to a file in .hg/ directory and
     can populate the object data reading that file.
 
     Uses cbor to serialize and deserialize data while writing and reading from
     disk.
     """
 
     def __init__(self, repo, fname):
         """ repo is the repo object
         fname is the file name in which data should be stored in .hg directory
         """
         self._repo = repo
         self.fname = fname
 
     def read(self):
         """read the existing state file and return a dict of data stored"""
         return self._read()
 
     def save(self, version, data):
         """write all the state data stored to .hg/<filename> file
 
         we use third-party library cbor to serialize data to write in the file.
         """
         if not isinstance(version, int):
             raise error.ProgrammingError("version of state file should be"
                                          " an integer")
 
         with self._repo.vfs(self.fname, 'wb', atomictemp=True) as fp:
             fp.write('%d\n' % version)
             for chunk in cborutil.streamencode(data):
                 fp.write(chunk)
 
     def _read(self):
         """reads the state file and returns a dictionary which contain
         data in the same format as it was before storing"""
         with self._repo.vfs(self.fname, 'rb') as fp:
             try:
                 int(fp.readline())
             except ValueError:
                 raise error.CorruptedState("unknown version of state file"
                                            " found")
 
             return cborutil.decodeall(fp.read())[0]
 
     def delete(self):
         """drop the state file if exists"""
         util.unlinkpath(self._repo.vfs.join(self.fname), ignoremissing=True)
 
     def exists(self):
         """check whether the state file exists or not"""
         return self._repo.vfs.exists(self.fname)
 
 class _statecheck(object):
     """a utility class that deals with multistep operations like graft,
        histedit, bisect, update etc and check whether such commands
        are in an unfinished conditition or not and return appropriate message
        and hint.
        It also has the ability to register and determine the states of any new
        multistep operation or multistep command extension.
     """
 
     def __init__(self, opname, fname, clearable, allowcommit, reportonly,
                  continueflag, stopflag, cmdmsg, cmdhint, statushint,
                  abortfunc):
         self._opname = opname
         self._fname = fname
         self._clearable = clearable
         self._allowcommit = allowcommit
         self._reportonly = reportonly
         self._continueflag = continueflag
         self._stopflag = stopflag
         self._cmdmsg = cmdmsg
         self._cmdhint = cmdhint
         self._statushint = statushint
         self.abortfunc = abortfunc
 
     def statusmsg(self):
         """returns the hint message corresponding to the command for
         hg status --verbose
         """
         if not self._statushint:
             hint = (_('To continue:    hg %s --continue\n'
                       'To abort:       hg %s --abort') % (self._opname,
                        self._opname))
             if self._stopflag:
                 hint = hint + (_('\nTo stop:        hg %s --stop') %
                             (self._opname))
             return hint
         return self._statushint
 
     def hint(self):
         """returns the hint message corresponding to an interrupted
         operation
         """
         if not self._cmdhint:
                 return (_("use 'hg %s --continue' or 'hg %s --abort'") %
                         (self._opname, self._opname))
         return self._cmdhint
 
     def msg(self):
         """returns the status message corresponding to the command"""
         if not self._cmdmsg:
             return _('%s in progress') % (self._opname)
         return self._cmdmsg
 
     def continuemsg(self):
         """ returns appropriate continue message corresponding to command"""
         return _('hg %s --continue') % (self._opname)
 
     def isunfinished(self, repo):
         """determines whether a multi-step operation is in progress
         or not
         """
         if self._opname == 'merge':
             return len(repo[None].parents()) > 1
         else:
             return repo.vfs.exists(self._fname)
 
 # A list of statecheck objects for multistep operations like graft.
 _unfinishedstates = []
 
 def addunfinished(opname, fname, clearable=False, allowcommit=False,
                   reportonly=False, continueflag=False, stopflag=False,
                   cmdmsg="", cmdhint="", statushint="", abortfunc=None):
     """this registers a new command or operation to unfinishedstates
     opname is the name the command or operation
     fname is the file name in which data should be stored in .hg directory.
     It is None for merge command.
     clearable boolean determines whether or not interrupted states can be
     cleared by running `hg update -C .` which in turn deletes the
     state file.
     allowcommit boolean decides whether commit is allowed during interrupted
     state or not.
     reportonly flag is used for operations like bisect where we just
     need to detect the operation using 'hg status --verbose'
     continueflag is a boolean determines whether or not a command supports
     `--continue` option or not.
     stopflag is a boolean that determines whether or not a command supports
     --stop flag
     cmdmsg is used to pass a different status message in case standard
     message of the format "abort: cmdname in progress" is not desired.
     cmdhint is used to pass a different hint message in case standard
     message of the format "To continue: hg cmdname --continue
     To abort: hg cmdname --abort" is not desired.
     statushint is used to pass a different status message in case standard
     message of the format ('To continue:    hg cmdname --continue'
     'To abort:       hg cmdname --abort') is not desired
     abortfunc stores the function required to abort an unfinished state.
     """
     statecheckobj = _statecheck(opname, fname, clearable, allowcommit,
                                 reportonly, continueflag, stopflag, cmdmsg,
                                 cmdhint, statushint, abortfunc)
     if opname == 'merge':
         _unfinishedstates.append(statecheckobj)
     else:
         _unfinishedstates.insert(0, statecheckobj)
 
 addunfinished(
-    'graft', fname='graftstate', clearable=True, stopflag=True,
-    continueflag=True,
-    cmdhint=_("use 'hg graft --continue' or 'hg graft --stop' to stop")
-)
-addunfinished(
     'unshelve', fname='shelvedstate', continueflag=True,
     cmdmsg=_('unshelve already in progress')
 )
 addunfinished(
     'update', fname='updatestate', clearable=True,
     cmdmsg=_('last update was interrupted'),
     cmdhint=_("use 'hg update' to get a consistent checkout"),
     statushint=_("To continue:    hg update")
 )
 addunfinished(
     'bisect', fname='bisect.state', allowcommit=True, reportonly=True,
     statushint=_('To mark the changeset good:    hg bisect --good\n'
                  'To mark the changeset bad:     hg bisect --bad\n'
                  'To abort:                      hg bisect --reset\n')
 )
 addunfinished(
     'merge', fname=None, clearable=True, allowcommit=True,
     cmdmsg=_('outstanding uncommitted merge'),
     statushint=_('To continue:    hg commit\n'
                  'To abort:       hg merge --abort'),
     cmdhint=_("use 'hg commit' or 'hg merge --abort'")
 )
 
 def getrepostate(repo):
     # experimental config: commands.status.skipstates
     skip = set(repo.ui.configlist('commands', 'status.skipstates'))
     for state in _unfinishedstates:
         if state._opname in skip:
             continue
         if state.isunfinished(repo):
             return (state._opname, state.statusmsg())

tests/test-graft.t

@@ -1,2411 +1,2427 b''
+#testcases abortcommand abortflag
+
   $ cat >> $HGRCPATH <<EOF
   > [extdiff]
   > # for portability:
   > pdiff = sh "$RUNTESTDIR/pdiff"
   > EOF
 
+#if abortflag
+  $ cat >> $HGRCPATH <<EOF
+  > [alias]
+  > abort = graft --abort
+  > EOF
+#endif
+
 Create a repo with some stuff in it:
 
   $ hg init a
   $ cd a
   $ echo a > a
   $ echo a > d
   $ echo a > e
   $ hg ci -qAm0
   $ echo b > a
   $ hg ci -m1 -u bar
   $ hg mv a b
   $ hg ci -m2
   $ hg cp b c
   $ hg ci -m3 -u baz
   $ echo b > d
   $ echo f > e
   $ hg ci -m4
   $ hg up -q 3
   $ echo b > e
   $ hg branch -q stable
   $ hg ci -m5
   $ hg merge -q default --tool internal:local # for conflicts in e, choose 5 and ignore 4
   $ hg branch -q default
   $ hg ci -m6
   $ hg phase --public 3
   $ hg phase --force --secret 6
 
   $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
   @    [e-mail]: 6
   |\
   | o  [e-mail]: 5
   | |
   o |  [e-mail]: 4
   |/
   o  [e-mail]: 3
   |
   o  [e-mail]: 2
   |
   o  [e-mail]: 1
   |
   o  [e-mail]: 0
   
 Test --base for grafting the merge of 4 from the perspective of 5, thus only getting the change to d
 
   $ hg up -cqr 3
   $ hg graft -r 6 --base 5
   grafting 6:25a2b029d3ae "6" (tip)
   merging e
   $ hg st --change .
   M d
 
   $ hg -q strip . --config extensions.strip=
 
 Test --base for collapsing changesets 2 and 3, thus getting both b and c
 
   $ hg up -cqr 0
   $ hg graft -r 3 --base 1
   grafting 3:4c60f11aa304 "3"
   merging a and b to b
   merging a and c to c
   $ hg st --change .
   A b
   A c
   R a
 
   $ hg -q strip . --config extensions.strip=
 
 Specifying child as --base revision fails safely (perhaps slightly confusing, but consistent)
 
   $ hg graft -r 2 --base 3
   grafting 2:5c095ad7e90f "2"
   note: possible conflict - c was deleted and renamed to:
    a
   note: graft of 2:5c095ad7e90f created no changes to commit
 
 Can't continue without starting:
 
   $ hg -q up -cr tip
   $ hg rm -q e
   $ hg graft --continue
   abort: no graft in progress
   [255]
   $ hg revert -r . -q e
 
 Need to specify a rev:
 
   $ hg graft
   abort: no revisions specified
   [255]
 
 Can't graft ancestor:
 
   $ hg graft 1 2
   skipping ancestor revision 1:5d205f8b35b6
   skipping ancestor revision 2:5c095ad7e90f
   [255]
 
 Specify revisions with -r:
 
   $ hg graft -r 1 -r 2
   skipping ancestor revision 1:5d205f8b35b6
   skipping ancestor revision 2:5c095ad7e90f
   [255]
 
   $ hg graft -r 1 2
   warning: inconsistent use of --rev might give unexpected revision ordering!
   skipping ancestor revision 2:5c095ad7e90f
   skipping ancestor revision 1:5d205f8b35b6
   [255]
 
 Conflicting date/user options:
 
   $ hg up -q 0
   $ hg graft -U --user foo 2
   abort: --user and --currentuser are mutually exclusive
   [255]
   $ hg graft -D --date '0 0' 2
   abort: --date and --currentdate are mutually exclusive
   [255]
 
 Can't graft with dirty wd:
 
   $ hg up -q 0
   $ echo foo > a
   $ hg graft 1
   abort: uncommitted changes
   [255]
   $ hg revert a
 
 Graft a rename:
 (this also tests that editor is invoked if '--edit' is specified)
 
   $ hg status --rev "2^1" --rev 2
   A b
   R a
   $ HGEDITOR=cat hg graft 2 -u foo --edit
   grafting 2:5c095ad7e90f "2"
   merging a and b to b
   2
   
   
   HG: Enter commit message.  Lines beginning with 'HG:' are removed.
   HG: Leave message empty to abort commit.
   HG: --
   HG: user: foo
   HG: branch 'default'
   HG: added b
   HG: removed a
   $ hg export tip --git
   # HG changeset patch
   # User foo
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID ef0ef43d49e79e81ddafdc7997401ba0041efc82
   # Parent  68795b066622ca79a25816a662041d8f78f3cd9e
   2
   
   diff --git a/a b/b
   rename from a
   rename to b
 
 Look for extra:source
 
   $ hg log --debug -r tip
   changeset:   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
   tag:         tip
   phase:       draft
   parent:      0:68795b066622ca79a25816a662041d8f78f3cd9e
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    7:e59b6b228f9cbf9903d5e9abf996e083a1f533eb
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   files+:      b
   files-:      a
   extra:       branch=default
   extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   description:
   2
   
   
 
 Graft out of order, skipping a merge and a duplicate
 (this also tests that editor is not invoked if '--edit' is not specified)
 
   $ hg graft 1 5 4 3 'merge()' 2 -n
   skipping ungraftable merge revision 6
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   grafting 1:5d205f8b35b6 "1"
   grafting 5:97f8bfe72746 "5"
   grafting 4:9c233e8e184d "4"
   grafting 3:4c60f11aa304 "3"
 
   $ HGEDITOR=cat hg graft 1 5 'merge()' 2 --debug
   skipping ungraftable merge revision 6
   scanning for duplicate grafts
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   grafting 1:5d205f8b35b6 "1"
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 68795b066622, local: ef0ef43d49e7+, remote: 5d205f8b35b6
    preserving b for resolve of b
   starting 4 threads for background file closing (?)
    b: local copied/moved from a -> m (premerge)
   picked tool ':merge' for b (binary False symlink False changedelete False)
   merging b and a to b
   my b@ef0ef43d49e7+ other a@5d205f8b35b6 ancestor a@68795b066622
    premerge successful
   committing files:
   b
   committing manifest
   committing changelog
   updating the branch cache
   grafting 5:97f8bfe72746 "5"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'c' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 6b9e5368ca4e+, remote: 97f8bfe72746
    e: remote is newer -> g
   getting e
   committing files:
   e
   committing manifest
   committing changelog
   updating the branch cache
   $ HGEDITOR=cat hg graft 4 3 --log --debug
   scanning for duplicate grafts
   grafting 4:9c233e8e184d "4"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'c' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 1905859650ec+, remote: 9c233e8e184d
    preserving e for resolve of e
    d: remote is newer -> g
   getting d
    e: versions differ -> m (premerge)
   picked tool ':merge' for e (binary False symlink False changedelete False)
   merging e
   my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
    e: versions differ -> m (merge)
   picked tool ':merge' for e (binary False symlink False changedelete False)
   my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
 Summary should mention graft:
 
   $ hg summary |grep graft
   commit: 2 modified, 2 unknown, 1 unresolved (graft in progress)
 
 Using status to get more context
 
   $ hg status --verbose
   M d
   M e
   ? a.orig
   ? e.orig
   # The repository is in an unfinished *graft* state.
   
   # Unresolved merge conflicts:
   # 
   #     e
   # 
   # To mark files as resolved:  hg resolve --mark FILE
   
   # To continue:    hg graft --continue
   # To abort:       hg graft --abort
   # To stop:        hg graft --stop
   
 
 Commit while interrupted should fail:
 
   $ hg ci -m 'commit interrupted graft'
   abort: graft in progress
   (use 'hg graft --continue' or 'hg graft --stop' to stop)
   [255]
 
 Abort the graft and try committing:
 
   $ hg up -C .
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo c >> e
   $ hg ci -mtest
 
   $ hg strip . --config extensions.strip=
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/a/.hg/strip-backup/*-backup.hg (glob)
 
 Graft again:
 
   $ hg graft 1 5 4 3 'merge()' 2
   skipping ungraftable merge revision 6
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   skipping revision 1:5d205f8b35b6 (already grafted to 8:6b9e5368ca4e)
   skipping revision 5:97f8bfe72746 (already grafted to 9:1905859650ec)
   grafting 4:9c233e8e184d "4"
   merging e
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
 Continue without resolve should fail:
 
   $ hg graft -c
   grafting 4:9c233e8e184d "4"
   abort: unresolved merge conflicts (see 'hg help resolve')
   [255]
 
 Fix up:
 
   $ echo b > e
   $ hg resolve -m e
   (no more unresolved files)
   continue: hg graft --continue
 
 Continue with a revision should fail:
 
   $ hg graft -c 6
   abort: can't specify --continue and revisions
   [255]
 
   $ hg graft -c -r 6
   abort: can't specify --continue and revisions
   [255]
 
 Continue for real, clobber usernames
 
   $ hg graft -c -U
   grafting 4:9c233e8e184d "4"
   grafting 3:4c60f11aa304 "3"
 
 Compare with original:
 
   $ hg diff -r 6
   $ hg status --rev 0:. -C
   M d
   M e
   A b
     a
   A c
     a
   R a
 
 View graph:
 
   $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
   @  [e-mail]: 3
   |
   o  [e-mail]: 4
   |
   o  [e-mail]: 5
   |
   o  [e-mail]: 1
   |
   o  [e-mail]: 2
   |
   | o    [e-mail]: 6
   | |\
   | | o  [e-mail]: 5
   | | |
   | o |  [e-mail]: 4
   | |/
   | o  [e-mail]: 3
   | |
   | o  [e-mail]: 2
   | |
   | o  [e-mail]: 1
   |/
   o  [e-mail]: 0
   
 Graft again onto another branch should preserve the original source
   $ hg up -q 0
   $ echo 'g'>g
   $ hg add g
   $ hg ci -m 7
   created new head
   $ hg graft 7
   grafting 7:ef0ef43d49e7 "2"
 
   $ hg log -r 7 --template '{rev}:{node}\n'
   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
   $ hg log -r 2 --template '{rev}:{node}\n'
   2:5c095ad7e90f871700f02dd1fa5012cb4498a2d4
 
   $ hg log --debug -r tip
   changeset:   13:7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   tag:         tip
   phase:       draft
   parent:      12:b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    13:dc313617b8c32457c0d589e0dbbedfe71f3cd637
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   files+:      b
   files-:      a
   extra:       branch=default
   extra:       intermediate-source=ef0ef43d49e79e81ddafdc7997401ba0041efc82
   extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   description:
   2
   
   
 Disallow grafting an already grafted cset onto its original branch
   $ hg up -q 6
   $ hg graft 7
   skipping already grafted revision 7:ef0ef43d49e7 (was grafted from 2:5c095ad7e90f)
   [255]
 
   $ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13
   --- */hg-5c095ad7e90f.patch	* (glob)
   +++ */hg-7a4785234d87.patch	* (glob)
   @@ -1,18 +1,18 @@
    # HG changeset patch
   -# User test
   +# User foo
    # Date 0 0
    #      Thu Jan 01 00:00:00 1970 +0000
   -# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   -# Parent  5d205f8b35b66bc36375c9534ffd3237730e8f04
   +# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   +# Parent  b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
    2
    
   -diff -r 5d205f8b35b6 -r 5c095ad7e90f a
   +diff -r b592ea63bb0c -r 7a4785234d87 a
    --- a/a	Thu Jan 01 00:00:00 1970 +0000
    +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
    @@ -1,1 +0,0 @@
   --b
   -diff -r 5d205f8b35b6 -r 5c095ad7e90f b
   +-a
   +diff -r b592ea63bb0c -r 7a4785234d87 b
    --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
    +++ b/b	Thu Jan 01 00:00:00 1970 +0000
    @@ -0,0 +1,1 @@
   -+b
   ++a
   [1]
 
   $ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13 -X .
   --- */hg-5c095ad7e90f.patch	* (glob)
   +++ */hg-7a4785234d87.patch	* (glob)
   @@ -1,8 +1,8 @@
    # HG changeset patch
   -# User test
   +# User foo
    # Date 0 0
    #      Thu Jan 01 00:00:00 1970 +0000
   -# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   -# Parent  5d205f8b35b66bc36375c9534ffd3237730e8f04
   +# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   +# Parent  b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
    2
    
   [1]
 
 Disallow grafting already grafted csets with the same origin onto each other
   $ hg up -q 13
   $ hg graft 2
   skipping revision 2:5c095ad7e90f (already grafted to 13:7a4785234d87)
   [255]
   $ hg graft 7
   skipping already grafted revision 7:ef0ef43d49e7 (13:7a4785234d87 also has origin 2:5c095ad7e90f)
   [255]
 
   $ hg up -q 7
   $ hg graft 2
   skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
   [255]
   $ hg graft tip
   skipping already grafted revision 13:7a4785234d87 (7:ef0ef43d49e7 also has origin 2:5c095ad7e90f)
   [255]
 
 Graft with --log
 
   $ hg up -Cq 1
   $ hg graft 3 --log -u foo
   grafting 3:4c60f11aa304 "3"
   warning: can't find ancestor for 'c' copied from 'b'!
   $ hg log --template '{rev}:{node|short} {parents} {desc}\n' -r tip
   14:0c921c65ef1e 1:5d205f8b35b6  3
   (grafted from 4c60f11aa304a54ae1c199feb94e7fc771e51ed8)
 
 Resolve conflicted graft
   $ hg up -q 0
   $ echo b > a
   $ hg ci -m 8
   created new head
   $ echo c > a
   $ hg ci -m 9
   $ hg graft 1 --tool internal:fail
   grafting 1:5d205f8b35b6 "1"
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
   $ hg resolve --all
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   [1]
   $ cat a
   <<<<<<< local: aaa4406d4f0a - test: 9
   c
   =======
   b
   >>>>>>> graft: 5d205f8b35b6 - bar: 1
   $ echo b > a
   $ hg resolve -m a
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft -c
   grafting 1:5d205f8b35b6 "1"
   $ hg export tip --git
   # HG changeset patch
   # User bar
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID f67661df0c4804d301f064f332b57e7d5ddaf2be
   # Parent  aaa4406d4f0ae9befd6e58c82ec63706460cbca6
   1
   
   diff --git a/a b/a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -c
   +b
 
 Resolve conflicted graft with rename
   $ echo c > a
   $ hg ci -m 10
   $ hg graft 2 --tool internal:fail
   grafting 2:5c095ad7e90f "2"
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
   $ hg resolve --all
   merging a and b to b
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft -c
   grafting 2:5c095ad7e90f "2"
   $ hg export tip --git
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID 9627f653b421c61fc1ea4c4e366745070fa3d2bc
   # Parent  ee295f490a40b97f3d18dd4c4f1c8936c233b612
   2
   
   diff --git a/a b/b
   rename from a
   rename to b
 
 Test simple origin(), with and without args
   $ hg log -r 'origin()'
   changeset:   1:5d205f8b35b6
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   3:4c60f11aa304
   user:        baz
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   4:9c233e8e184d
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     4
   
   changeset:   5:97f8bfe72746
   branch:      stable
   parent:      3:4c60f11aa304
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     5
   
   $ hg log -r 'origin(7)'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Now transplant a graft to test following through copies
   $ hg up -q 0
   $ hg branch -q dev
   $ hg ci -qm "dev branch"
   $ hg --config extensions.transplant= transplant -q 7
   $ hg log -r 'origin(.)'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Test that the graft and transplant markers in extra are converted, allowing
 origin() to still work.  Note that these recheck the immediately preceeding two
 tests.
   $ hg --quiet --config extensions.convert= --config convert.hg.saverev=True convert . ../converted
 
 The graft case
   $ hg -R ../converted log -r 7 --template "{rev}: {node}\n{join(extras, '\n')}\n"
   7: 7ae846e9111fc8f57745634250c7b9ac0a60689b
   branch=default
   convert_revision=ef0ef43d49e79e81ddafdc7997401ba0041efc82
   source=e0213322b2c1a5d5d236c74e79666441bee67a7d
   $ hg -R ../converted log -r 'origin(7)'
   changeset:   2:e0213322b2c1
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Test that template correctly expands more than one 'extra' (issue4362), and that
 'intermediate-source' is converted.
   $ hg -R ../converted log -r 13 --template "{extras % ' Extra: {extra}\n'}"
    Extra: branch=default
    Extra: convert_revision=7a4785234d87ec1aa420ed6b11afe40fa73e12a9
    Extra: intermediate-source=7ae846e9111fc8f57745634250c7b9ac0a60689b
    Extra: source=e0213322b2c1a5d5d236c74e79666441bee67a7d
 
 The transplant case
   $ hg -R ../converted log -r tip --template "{rev}: {node}\n{join(extras, '\n')}\n"
   21: fbb6c5cc81002f2b4b49c9d731404688bcae5ade
   branch=dev
   convert_revision=7e61b508e709a11d28194a5359bc3532d910af21
   transplant_source=z\xe8F\xe9\x11\x1f\xc8\xf5wEcBP\xc7\xb9\xac\n`h\x9b
   $ hg -R ../converted log -r 'origin(tip)'
   changeset:   2:e0213322b2c1
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 
 Test simple destination
   $ hg log -r 'destination()'
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   8:6b9e5368ca4e
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   9:1905859650ec
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     5
   
   changeset:   10:52dc0b4c6907
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     4
   
   changeset:   11:882b35362a6b
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   13:7a4785234d87
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   14:0c921c65ef1e
   parent:      1:5d205f8b35b6
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   17:f67661df0c48
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   19:9627f653b421
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg log -r 'destination(2)'
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   13:7a4785234d87
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   19:9627f653b421
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Transplants of grafts can find a destination...
   $ hg log -r 'destination(7)'
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 ... grafts of grafts unfortunately can't
   $ hg graft -q 13 --debug
   scanning for duplicate grafts
   grafting 13:7a4785234d87 "2"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: b592ea63bb0c, local: 7e61b508e709+, remote: 7a4785234d87
   starting 4 threads for background file closing (?)
   committing files:
   b
   warning: can't find ancestor for 'b' copied from 'a'!
   reusing manifest from p1 (listed files actually unchanged)
   committing changelog
   updating the branch cache
   $ hg log -r 'destination(13)'
 All copies of a cset
   $ hg log -r 'origin(13) or destination(origin(13))'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   13:7a4785234d87
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   19:9627f653b421
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   22:3a4e92d81b97
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 
 graft works on complex revset
 
   $ hg graft 'origin(13) or destination(origin(13))'
   skipping ancestor revision 21:7e61b508e709
   skipping ancestor revision 22:3a4e92d81b97
   skipping revision 2:5c095ad7e90f (already grafted to 22:3a4e92d81b97)
   grafting 7:ef0ef43d49e7 "2"
   warning: can't find ancestor for 'b' copied from 'a'!
   grafting 13:7a4785234d87 "2"
   warning: can't find ancestor for 'b' copied from 'a'!
   grafting 19:9627f653b421 "2"
   merging b
   warning: can't find ancestor for 'b' copied from 'a'!
 
 graft with --force (still doesn't graft merges)
 
   $ hg graft 19 0 6
   skipping ungraftable merge revision 6
   skipping ancestor revision 0:68795b066622
   skipping already grafted revision 19:9627f653b421 (22:3a4e92d81b97 also has origin 2:5c095ad7e90f)
   [255]
   $ hg graft 19 0 6 --force
   skipping ungraftable merge revision 6
   grafting 19:9627f653b421 "2"
   merging b
   warning: can't find ancestor for 'b' copied from 'a'!
   grafting 0:68795b066622 "0"
 
 graft --force after backout
 
   $ echo abc > a
   $ hg ci -m 28
   $ hg backout 28
   reverting a
   changeset 29:9d95e865b00c backs out changeset 28:cc20d29aec8d
   $ hg graft 28
   skipping ancestor revision 28:cc20d29aec8d
   [255]
   $ hg graft 28 --force
   grafting 28:cc20d29aec8d "28"
   merging a
   $ cat a
   abc
 
 graft --continue after --force
 
   $ echo def > a
   $ hg ci -m 31
   $ hg graft 28 --force --tool internal:fail
   grafting 28:cc20d29aec8d "28"
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
   $ hg resolve --all
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   [1]
   $ echo abc > a
   $ hg resolve -m a
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft -c
   grafting 28:cc20d29aec8d "28"
   $ cat a
   abc
 
 Continue testing same origin policy, using revision numbers from test above
 but do some destructive editing of the repo:
 
   $ hg up -qC 7
   $ hg tag -l -r 13 tmp
   $ hg --config extensions.strip= strip 2
   saved backup bundle to $TESTTMP/a/.hg/strip-backup/5c095ad7e90f-d323a1e4-backup.hg
   $ hg graft tmp
   skipping already grafted revision 8:7a4785234d87 (2:ef0ef43d49e7 also has unknown origin 5c095ad7e90f)
   [255]
 
 Empty graft
 
   $ hg up -qr 26
   $ hg tag -f something
   $ hg graft -qr 27
   $ hg graft -f 27
   grafting 27:17d42b8f5d50 "28"
   note: graft of 27:17d42b8f5d50 created no changes to commit
 
   $ cd ..
 
 Graft to duplicate a commit
 
   $ hg init graftsibling
   $ cd graftsibling
   $ touch a
   $ hg commit -qAm a
   $ touch b
   $ hg commit -qAm b
   $ hg log -G -T '{rev}\n'
   @  1
   |
   o  0
   
   $ hg up -q 0
   $ hg graft -r 1
   grafting 1:0e067c57feba "b" (tip)
   $ hg log -G -T '{rev}\n'
   @  2
   |
   | o  1
   |/
   o  0
   
 Graft to duplicate a commit twice
 
   $ hg up -q 0
   $ hg graft -r 2
   grafting 2:044ec77f6389 "b" (tip)
   $ hg log -G -T '{rev}\n'
   @  3
   |
   | o  2
   |/
   | o  1
   |/
   o  0
   
 Graft from behind a move or rename
 ==================================
 
 NOTE: This is affected by issue5343, and will need updating when it's fixed
 
 Consider this topology for a regular graft:
 
 o c1
 |
 | o c2
 | |
 | o ca # stands for "common ancestor"
 |/
 o cta # stands for "common topological ancestor"
 
 Note that in issue5343, ca==cta.
 
 The following table shows the possible cases. Here, "x->y" and, equivalently,
 "y<-x", where x is an ancestor of y, means that some copy happened from x to y.
 
 name | c1<-cta | cta<->ca | ca->c2
 A.0  |         |          |
 A.1  |    X    |          |
 A.2  |         |     X    |
 A.3  |         |          |   X
 A.4  |    X    |     X    |
 A.5  |    X    |          |   X
 A.6  |         |     X    |   X
 A.7  |    X    |     X    |   X
 
 A.0 is trivial, and doesn't need copy tracking.
 For A.1, a forward rename is recorded in the c1 pass, to be followed later.
 In A.2, the rename is recorded in the c2 pass and followed backwards.
 A.3 is recorded in the c2 pass as a forward rename to be duplicated on target.
 In A.4, both passes of checkcopies record incomplete renames, which are
 then joined in mergecopies to record a rename to be followed.
 In A.5 and A.7, the c1 pass records an incomplete rename, while the c2 pass
 records an incomplete divergence. The incomplete rename is then joined to the
 appropriate side of the incomplete divergence, and the result is recorded as a
 divergence. The code doesn't distinguish at all between these two cases, since
 the end result of them is the same: an incomplete divergence joined with an
 incomplete rename into a divergence.
 Finally, A.6 records a divergence entirely in the c2 pass.
 
 A.4 has a degenerate case a<-b<-a->a, where checkcopies isn't needed at all.
 A.5 has a special case a<-b<-b->a, which is treated like a<-b->a in a merge.
 A.5 has issue5343 as a special case.
 A.6 has a special case a<-a<-b->a. Here, checkcopies will find a spurious
 incomplete divergence, which is in fact complete. This is handled later in
 mergecopies.
 A.7 has 4 special cases: a<-b<-a->b (the "ping-pong" case), a<-b<-c->b,
 a<-b<-a->c and a<-b<-c->a. Of these, only the "ping-pong" case is interesting,
 the others are fairly trivial (a<-b<-c->b and a<-b<-a->c proceed like the base
 case, a<-b<-c->a is treated the same as a<-b<-b->a).
 
 f5a therefore tests the "ping-pong" rename case, where a file is renamed to the
 same name on both branches, then the rename is backed out on one branch, and
 the backout is grafted to the other branch. This creates a challenging rename
 sequence of a<-b<-a->b in the graft target, topological CA, graft CA and graft
 source, respectively. Since rename detection will run on the c1 side for such a
 sequence (as for technical reasons, we split the c1 and c2 sides not at the
 graft CA, but rather at the topological CA), it will pick up a false rename,
 and cause a spurious merge conflict. This false rename is always exactly the
 reverse of the true rename that would be detected on the c2 side, so we can
 correct for it by detecting this condition and reversing as necessary.
 
 First, set up the repository with commits to be grafted
 
   $ hg init ../graftmove
   $ cd ../graftmove
   $ echo c1a > f1a
   $ echo c2a > f2a
   $ echo c3a > f3a
   $ echo c4a > f4a
   $ echo c5a > f5a
   $ hg ci -qAm A0
   $ hg mv f1a f1b
   $ hg mv f3a f3b
   $ hg mv f5a f5b
   $ hg ci -qAm B0
   $ echo c1c > f1b
   $ hg mv f2a f2c
   $ hg mv f5b f5a
   $ echo c5c > f5a
   $ hg ci -qAm C0
   $ hg mv f3b f3d
   $ echo c4d > f4a
   $ hg ci -qAm D0
   $ hg log -G
   @  changeset:   3:b69f5839d2d9
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     D0
   |
   o  changeset:   2:f58c7e2b28fa
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     C0
   |
   o  changeset:   1:3d7bba921b5d
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     B0
   |
   o  changeset:   0:11f7a1b56675
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     A0
   
 
 Test the cases A.2 (f1x), A.3 (f2x) and a special case of A.6 (f5x) where the
 two renames actually converge to the same name (thus no actual divergence).
 
   $ hg up -q 'desc("A0")'
   $ HGEDITOR="echo C1 >" hg graft -r 'desc("C0")' --edit
   grafting 2:f58c7e2b28fa "C0"
   merging f1a and f1b to f1a
   merging f5a
   warning: can't find ancestor for 'f5a' copied from 'f5b'!
   $ hg status --change .
   M f1a
   M f5a
   A f2c
   R f2a
   $ hg cat f1a
   c1c
   $ hg cat f1b
   f1b: no such file in rev c9763722f9bd
   [1]
 
 Test the cases A.0 (f4x) and A.6 (f3x)
 
   $ HGEDITOR="echo D1 >" hg graft -r 'desc("D0")' --edit
   grafting 3:b69f5839d2d9 "D0"
   note: possible conflict - f3b was renamed multiple times to:
    f3a
    f3d
   warning: can't find ancestor for 'f3d' copied from 'f3b'!
 
 Set up the repository for some further tests
 
   $ hg up -q "min(desc("A0"))"
   $ hg mv f1a f1e
   $ echo c2e > f2a
   $ hg mv f3a f3e
   $ hg mv f4a f4e
   $ hg mv f5a f5b
   $ hg ci -qAm "E0"
   $ hg up -q "min(desc("A0"))"
   $ hg cp f1a f1f
   $ hg ci -qAm "F0"
   $ hg up -q "min(desc("A0"))"
   $ hg cp f1a f1g
   $ echo c1g > f1g
   $ hg ci -qAm "G0"
   $ hg log -G
   @  changeset:   8:ba67f08fb15a
   |  tag:         tip
   |  parent:      0:11f7a1b56675
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     G0
   |
   | o  changeset:   7:d376ab0d7fda
   |/   parent:      0:11f7a1b56675
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     F0
   |
   | o  changeset:   6:6bd1736cab86
   |/   parent:      0:11f7a1b56675
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     E0
   |
   | o  changeset:   5:560daee679da
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     D1
   | |
   | o  changeset:   4:c9763722f9bd
   |/   parent:      0:11f7a1b56675
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     C1
   |
   | o  changeset:   3:b69f5839d2d9
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     D0
   | |
   | o  changeset:   2:f58c7e2b28fa
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     C0
   | |
   | o  changeset:   1:3d7bba921b5d
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     B0
   |
   o  changeset:   0:11f7a1b56675
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     A0
   
 
 Test the cases A.4 (f1x), the "ping-pong" special case of A.7 (f5x),
 and A.3 with a local content change to be preserved (f2x).
 
   $ hg up -q "desc("E0")"
   $ HGEDITOR="echo C2 >" hg graft -r 'desc("C0")' --edit
   grafting 2:f58c7e2b28fa "C0"
   merging f1e and f1b to f1e
   merging f2a and f2c to f2c
 
 Test the cases A.1 (f4x) and A.7 (f3x).
 
   $ HGEDITOR="echo D2 >" hg graft -r 'desc("D0")' --edit
   grafting 3:b69f5839d2d9 "D0"
   note: possible conflict - f3b was renamed multiple times to:
    f3d
    f3e
   merging f4e and f4a to f4e
   warning: can't find ancestor for 'f3d' copied from 'f3b'!
 
   $ hg cat f2c
   c2e
 
 Test the case A.5 (move case, f1x).
 
   $ hg up -q "desc("C0")"
 BROKEN: Shouldn't get the warning about missing ancestor
   $ HGEDITOR="echo E1 >" hg graft -r 'desc("E0")' --edit
   grafting 6:6bd1736cab86 "E0"
   note: possible conflict - f1a was renamed multiple times to:
    f1b
    f1e
   note: possible conflict - f3a was renamed multiple times to:
    f3b
    f3e
   merging f2c and f2a to f2c
   merging f5a and f5b to f5b
   warning: can't find ancestor for 'f1e' copied from 'f1a'!
   warning: can't find ancestor for 'f3e' copied from 'f3a'!
   $ cat f1e
   c1a
 
 Test the case A.5 (copy case, f1x).
 
   $ hg up -q "desc("C0")"
 BROKEN: Shouldn't get the warning about missing ancestor
   $ HGEDITOR="echo F1 >" hg graft -r 'desc("F0")' --edit
   grafting 7:d376ab0d7fda "F0"
   warning: can't find ancestor for 'f1f' copied from 'f1a'!
 BROKEN: f1f should be marked a copy from f1b
   $ hg st --copies --change .
   A f1f
 BROKEN: f1f should have the new content from f1b (i.e. "c1c")
   $ cat f1f
   c1a
 
 Test the case A.5 (copy+modify case, f1x).
 
   $ hg up -q "desc("C0")"
 BROKEN: We should get a merge conflict from the 3-way merge between f1b in C0
 (content "c1c") and f1g in G0 (content "c1g") with f1a in A0 as base (content
 "c1a")
   $ HGEDITOR="echo G1 >" hg graft -r 'desc("G0")' --edit
   grafting 8:ba67f08fb15a "G0"
   warning: can't find ancestor for 'f1g' copied from 'f1a'!
 
 Check the results of the grafts tested
 
   $ hg log -CGv --patch --git
   @  changeset:   13:ef3adf6c20a4
   |  tag:         tip
   |  parent:      2:f58c7e2b28fa
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  files:       f1g
   |  description:
   |  G1
   |
   |
   |  diff --git a/f1g b/f1g
   |  new file mode 100644
   |  --- /dev/null
   |  +++ b/f1g
   |  @@ -0,0 +1,1 @@
   |  +c1g
   |
   | o  changeset:   12:b5542d755b54
   |/   parent:      2:f58c7e2b28fa
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    files:       f1f
   |    description:
   |    F1
   |
   |
   |    diff --git a/f1f b/f1f
   |    new file mode 100644
   |    --- /dev/null
   |    +++ b/f1f
   |    @@ -0,0 +1,1 @@
   |    +c1a
   |
   | o  changeset:   11:f8a162271246
   |/   parent:      2:f58c7e2b28fa
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    files:       f1e f2c f3e f4a f4e f5a f5b
   |    copies:      f4e (f4a) f5b (f5a)
   |    description:
   |    E1
   |
   |
   |    diff --git a/f1e b/f1e
   |    new file mode 100644
   |    --- /dev/null
   |    +++ b/f1e
   |    @@ -0,0 +1,1 @@
   |    +c1a
   |    diff --git a/f2c b/f2c
   |    --- a/f2c
   |    +++ b/f2c
   |    @@ -1,1 +1,1 @@
   |    -c2a
   |    +c2e
   |    diff --git a/f3e b/f3e
   |    new file mode 100644
   |    --- /dev/null
   |    +++ b/f3e
   |    @@ -0,0 +1,1 @@
   |    +c3a
   |    diff --git a/f4a b/f4e
   |    rename from f4a
   |    rename to f4e
   |    diff --git a/f5a b/f5b
   |    rename from f5a
   |    rename to f5b
   |
   | o  changeset:   10:93ee502e8b0a
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  files:       f3d f4e
   | |  description:
   | |  D2
   | |
   | |
   | |  diff --git a/f3d b/f3d
   | |  new file mode 100644
   | |  --- /dev/null
   | |  +++ b/f3d
   | |  @@ -0,0 +1,1 @@
   | |  +c3a
   | |  diff --git a/f4e b/f4e
   | |  --- a/f4e
   | |  +++ b/f4e
   | |  @@ -1,1 +1,1 @@
   | |  -c4a
   | |  +c4d
   | |
   | o  changeset:   9:539cf145f496
   | |  parent:      6:6bd1736cab86
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  files:       f1e f2a f2c f5a f5b
   | |  copies:      f2c (f2a) f5a (f5b)
   | |  description:
   | |  C2
   | |
   | |
   | |  diff --git a/f1e b/f1e
   | |  --- a/f1e
   | |  +++ b/f1e
   | |  @@ -1,1 +1,1 @@
   | |  -c1a
   | |  +c1c
   | |  diff --git a/f2a b/f2c
   | |  rename from f2a
   | |  rename to f2c
   | |  diff --git a/f5b b/f5a
   | |  rename from f5b
   | |  rename to f5a
   | |  --- a/f5b
   | |  +++ b/f5a
   | |  @@ -1,1 +1,1 @@
   | |  -c5a
   | |  +c5c
   | |
   | | o  changeset:   8:ba67f08fb15a
   | | |  parent:      0:11f7a1b56675
   | | |  user:        test
   | | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | | |  files:       f1g
   | | |  copies:      f1g (f1a)
   | | |  description:
   | | |  G0
   | | |
   | | |
   | | |  diff --git a/f1a b/f1g
   | | |  copy from f1a
   | | |  copy to f1g
   | | |  --- a/f1a
   | | |  +++ b/f1g
   | | |  @@ -1,1 +1,1 @@
   | | |  -c1a
   | | |  +c1g
   | | |
   | | | o  changeset:   7:d376ab0d7fda
   | | |/   parent:      0:11f7a1b56675
   | | |    user:        test
   | | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | | |    files:       f1f
   | | |    copies:      f1f (f1a)
   | | |    description:
   | | |    F0
   | | |
   | | |
   | | |    diff --git a/f1a b/f1f
   | | |    copy from f1a
   | | |    copy to f1f
   | | |
   | o |  changeset:   6:6bd1736cab86
   | |/   parent:      0:11f7a1b56675
   | |    user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | |    files:       f1a f1e f2a f3a f3e f4a f4e f5a f5b
   | |    copies:      f1e (f1a) f3e (f3a) f4e (f4a) f5b (f5a)
   | |    description:
   | |    E0
   | |
   | |
   | |    diff --git a/f1a b/f1e
   | |    rename from f1a
   | |    rename to f1e
   | |    diff --git a/f2a b/f2a
   | |    --- a/f2a
   | |    +++ b/f2a
   | |    @@ -1,1 +1,1 @@
   | |    -c2a
   | |    +c2e
   | |    diff --git a/f3a b/f3e
   | |    rename from f3a
   | |    rename to f3e
   | |    diff --git a/f4a b/f4e
   | |    rename from f4a
   | |    rename to f4e
   | |    diff --git a/f5a b/f5b
   | |    rename from f5a
   | |    rename to f5b
   | |
   | | o  changeset:   5:560daee679da
   | | |  user:        test
   | | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | | |  files:       f3d f4a
   | | |  description:
   | | |  D1
   | | |
   | | |
   | | |  diff --git a/f3d b/f3d
   | | |  new file mode 100644
   | | |  --- /dev/null
   | | |  +++ b/f3d
   | | |  @@ -0,0 +1,1 @@
   | | |  +c3a
   | | |  diff --git a/f4a b/f4a
   | | |  --- a/f4a
   | | |  +++ b/f4a
   | | |  @@ -1,1 +1,1 @@
   | | |  -c4a
   | | |  +c4d
   | | |
   | | o  changeset:   4:c9763722f9bd
   | |/   parent:      0:11f7a1b56675
   | |    user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | |    files:       f1a f2a f2c f5a
   | |    copies:      f2c (f2a)
   | |    description:
   | |    C1
   | |
   | |
   | |    diff --git a/f1a b/f1a
   | |    --- a/f1a
   | |    +++ b/f1a
   | |    @@ -1,1 +1,1 @@
   | |    -c1a
   | |    +c1c
   | |    diff --git a/f2a b/f2c
   | |    rename from f2a
   | |    rename to f2c
   | |    diff --git a/f5a b/f5a
   | |    --- a/f5a
   | |    +++ b/f5a
   | |    @@ -1,1 +1,1 @@
   | |    -c5a
   | |    +c5c
   | |
   +---o  changeset:   3:b69f5839d2d9
   | |    user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | |    files:       f3b f3d f4a
   | |    copies:      f3d (f3b)
   | |    description:
   | |    D0
   | |
   | |
   | |    diff --git a/f3b b/f3d
   | |    rename from f3b
   | |    rename to f3d
   | |    diff --git a/f4a b/f4a
   | |    --- a/f4a
   | |    +++ b/f4a
   | |    @@ -1,1 +1,1 @@
   | |    -c4a
   | |    +c4d
   | |
   o |  changeset:   2:f58c7e2b28fa
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  files:       f1b f2a f2c f5a f5b
   | |  copies:      f2c (f2a) f5a (f5b)
   | |  description:
   | |  C0
   | |
   | |
   | |  diff --git a/f1b b/f1b
   | |  --- a/f1b
   | |  +++ b/f1b
   | |  @@ -1,1 +1,1 @@
   | |  -c1a
   | |  +c1c
   | |  diff --git a/f2a b/f2c
   | |  rename from f2a
   | |  rename to f2c
   | |  diff --git a/f5b b/f5a
   | |  rename from f5b
   | |  rename to f5a
   | |  --- a/f5b
   | |  +++ b/f5a
   | |  @@ -1,1 +1,1 @@
   | |  -c5a
   | |  +c5c
   | |
   o |  changeset:   1:3d7bba921b5d
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    files:       f1a f1b f3a f3b f5a f5b
   |    copies:      f1b (f1a) f3b (f3a) f5b (f5a)
   |    description:
   |    B0
   |
   |
   |    diff --git a/f1a b/f1b
   |    rename from f1a
   |    rename to f1b
   |    diff --git a/f3a b/f3b
   |    rename from f3a
   |    rename to f3b
   |    diff --git a/f5a b/f5b
   |    rename from f5a
   |    rename to f5b
   |
   o  changeset:   0:11f7a1b56675
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      files:       f1a f2a f3a f4a f5a
      description:
      A0
   
   
      diff --git a/f1a b/f1a
      new file mode 100644
      --- /dev/null
      +++ b/f1a
      @@ -0,0 +1,1 @@
      +c1a
      diff --git a/f2a b/f2a
      new file mode 100644
      --- /dev/null
      +++ b/f2a
      @@ -0,0 +1,1 @@
      +c2a
      diff --git a/f3a b/f3a
      new file mode 100644
      --- /dev/null
      +++ b/f3a
      @@ -0,0 +1,1 @@
      +c3a
      diff --git a/f4a b/f4a
      new file mode 100644
      --- /dev/null
      +++ b/f4a
      @@ -0,0 +1,1 @@
      +c4a
      diff --git a/f5a b/f5a
      new file mode 100644
      --- /dev/null
      +++ b/f5a
      @@ -0,0 +1,1 @@
      +c5a
   
 Check superfluous filemerge of files renamed in the past but untouched by graft
 
   $ echo a > a
   $ hg ci -qAma
   $ hg mv a b
   $ echo b > b
   $ hg ci -qAmb
   $ echo c > c
   $ hg ci -qAmc
   $ hg up -q .~2
   $ hg graft tip -qt:fail
 
   $ cd ..
 
 Graft a change into a new file previously grafted into a renamed directory
 
   $ hg init dirmovenewfile
   $ cd dirmovenewfile
   $ mkdir a
   $ echo a > a/a
   $ hg ci -qAma
   $ echo x > a/x
   $ hg ci -qAmx
   $ hg up -q 0
   $ hg mv -q a b
   $ hg ci -qAmb
   $ hg graft -q 1 # a/x grafted as b/x, but no copy information recorded
   $ hg up -q 1
   $ echo y > a/x
   $ hg ci -qAmy
   $ hg up -q 3
   $ hg graft -q 4
   $ hg status --change .
   M b/x
 
 Prepare for test of skipped changesets and how merges can influence it:
 
   $ hg merge -q -r 1 --tool :local
   $ hg ci -m m
   $ echo xx >> b/x
   $ hg ci -m xx
 
   $ hg log -G -T '{rev} {desc|firstline}'
   @  7 xx
   |
   o    6 m
   |\
   | o  5 y
   | |
   +---o  4 y
   | |
   | o  3 x
   | |
   | o  2 b
   | |
   o |  1 x
   |/
   o  0 a
   
 Grafting of plain changes correctly detects that 3 and 5 should be skipped:
 
   $ hg up -qCr 4
   $ hg graft --tool :local -r 2::5
   skipping already grafted revision 3:ca093ca2f1d9 (was grafted from 1:13ec5badbf2a)
   skipping already grafted revision 5:43e9eb70dab0 (was grafted from 4:6c9a1289e5f1)
   grafting 2:42127f193bcd "b"
 
 Extending the graft range to include a (skipped) merge of 3 will not prevent us from
 also detecting that both 3 and 5 should be skipped:
 
   $ hg up -qCr 4
   $ hg graft --tool :local -r 2::7
   skipping ungraftable merge revision 6
   skipping already grafted revision 3:ca093ca2f1d9 (was grafted from 1:13ec5badbf2a)
   skipping already grafted revision 5:43e9eb70dab0 (was grafted from 4:6c9a1289e5f1)
   grafting 2:42127f193bcd "b"
   grafting 7:d3c3f2b38ecc "xx"
   note: graft of 7:d3c3f2b38ecc created no changes to commit
 
   $ cd ..
 
 Grafted revision should be warned and skipped only once. (issue6024)
 
   $ mkdir issue6024
   $ cd issue6024
 
   $ hg init base
   $ cd base
   $ touch x
   $ hg commit -qAminit
   $ echo a > x
   $ hg commit -mchange
   $ hg update -q 0
   $ hg graft -r 1
   grafting 1:a0b923c546aa "change" (tip)
   $ cd ..
 
   $ hg clone -qr 2 base clone
   $ cd clone
   $ hg pull -q
   $ hg merge -q 2
   $ hg commit -mmerge
   $ hg update -q 0
   $ hg graft -r 1
   grafting 1:04fc6d444368 "change"
   $ hg update -q 3
   $ hg log -G -T '{rev}:{node|shortest} <- {extras.source|shortest}\n'
   o  4:4e16 <- a0b9
   |
   | @    3:f0ac <-
   | |\
   +---o  2:a0b9 <-
   | |
   | o  1:04fc <- a0b9
   |/
   o  0:7848 <-
   
 
  the source of rev 4 is an ancestor of the working parent, and was also
  grafted as rev 1. it should be stripped from the target revisions only once.
 
   $ hg graft -r 4
   skipping already grafted revision 4:4e16bab40c9c (1:04fc6d444368 also has origin 2:a0b923c546aa)
   [255]
 
   $ cd ../..
 
 Testing the reading of old format graftstate file with newer mercurial
 
   $ hg init oldgraft
   $ cd oldgraft
   $ for ch in a b c; do echo foo > $ch; hg add $ch; hg ci -Aqm "added "$ch; done;
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  2:8be98ac1a569 added c
   |
   o  1:80e6d2c47cfe added b
   |
   o  0:f7ad41964313 added a
   
   $ hg up 0
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ echo bar > b
   $ hg add b
   $ hg ci -m "bar to b"
   created new head
   $ hg graft -r 1 -r 2
   grafting 1:80e6d2c47cfe "added b"
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
 Writing the nodes in old format to graftstate
 
   $ hg log -r 1 -r 2 -T '{node}\n' > .hg/graftstate
   $ echo foo > b
   $ hg resolve -m
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft --continue
   grafting 1:80e6d2c47cfe "added b"
   grafting 2:8be98ac1a569 "added c"
 
 Testing that --user is preserved during conflicts and value is reused while
 running `hg graft --continue`
 
   $ hg log -G
   @  changeset:   5:711e9fa999f1
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added c
   |
   o  changeset:   4:e5ad7353b408
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added b
   |
   o  changeset:   3:9e887f7a939c
   |  parent:      0:f7ad41964313
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     bar to b
   |
   | o  changeset:   2:8be98ac1a569
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     added c
   | |
   | o  changeset:   1:80e6d2c47cfe
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     added b
   |
   o  changeset:   0:f7ad41964313
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     added a
   
 
   $ hg up '.^^'
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg graft -r 1 -r 2 --user batman
   grafting 1:80e6d2c47cfe "added b"
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ echo wat > b
   $ hg resolve -m
   (no more unresolved files)
   continue: hg graft --continue
 
   $ hg graft --continue
   grafting 1:80e6d2c47cfe "added b"
   grafting 2:8be98ac1a569 "added c"
 
   $ hg log -Gr 3::
   @  changeset:   7:11a36ffaacf2
   |  tag:         tip
   |  user:        batman
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added c
   |
   o  changeset:   6:76803afc6511
   |  parent:      3:9e887f7a939c
   |  user:        batman
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added b
   |
   | o  changeset:   5:711e9fa999f1
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     added c
   | |
   | o  changeset:   4:e5ad7353b408
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     added b
   |
   o  changeset:   3:9e887f7a939c
   |  parent:      0:f7ad41964313
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     bar to b
   
 Test that --date is preserved and reused in `hg graft --continue`
 
   $ hg up '.^^'
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg graft -r 1 -r 2 --date '1234560000 120'
   grafting 1:80e6d2c47cfe "added b"
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ echo foobar > b
   $ hg resolve -m
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft --continue
   grafting 1:80e6d2c47cfe "added b"
   grafting 2:8be98ac1a569 "added c"
 
   $ hg log -Gr '.^^::.'
   @  changeset:   9:1896b76e007a
   |  tag:         tip
   |  user:        test
   |  date:        Fri Feb 13 21:18:00 2009 -0002
   |  summary:     added c
   |
   o  changeset:   8:ce2b4f1632af
   |  parent:      3:9e887f7a939c
   |  user:        test
   |  date:        Fri Feb 13 21:18:00 2009 -0002
   |  summary:     added b
   |
   o  changeset:   3:9e887f7a939c
   |  parent:      0:f7ad41964313
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     bar to b
   
 Test that --log is preserved and reused in `hg graft --continue`
 
   $ hg up '.^^'
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg graft -r 1 -r 2 --log
   grafting 1:80e6d2c47cfe "added b"
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ echo foobar > b
   $ hg resolve -m
   (no more unresolved files)
   continue: hg graft --continue
 
   $ hg graft --continue
   grafting 1:80e6d2c47cfe "added b"
   grafting 2:8be98ac1a569 "added c"
 
   $ hg log -GT "{rev}:{node|short} {desc}" -r '.^^::.'
   @  11:30c1050a58b2 added c
   |  (grafted from 8be98ac1a56990c2d9ca6861041b8390af7bd6f3)
   o  10:ec7eda2313e2 added b
   |  (grafted from 80e6d2c47cfe5b3185519568327a17a061c7efb6)
   o  3:9e887f7a939c bar to b
   |
   ~
 
   $ cd ..
 
 Testing the --stop flag of `hg graft` which stops the interrupted graft
 
   $ hg init stopgraft
   $ cd stopgraft
   $ for ch in a b c d; do echo $ch > $ch; hg add $ch; hg ci -Aqm "added "$ch; done;
 
   $ hg log -G
   @  changeset:   3:9150fe93bec6
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added d
   |
   o  changeset:   2:155349b645be
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added c
   |
   o  changeset:   1:5f6d8a4bf34a
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added b
   |
   o  changeset:   0:9092f1db7931
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     added a
   
   $ hg up '.^^'
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
   $ echo foo > d
   $ hg ci -Aqm "added foo to d"
 
   $ hg graft --stop
   abort: no interrupted graft found
   [255]
 
   $ hg graft -r 3
   grafting 3:9150fe93bec6 "added d"
   merging d
   warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ hg graft --stop --continue
   abort: cannot use '--continue' and '--stop' together
   [255]
 
   $ hg graft --stop -U
   abort: cannot specify any other flag with '--stop'
   [255]
   $ hg graft --stop --rev 4
   abort: cannot specify any other flag with '--stop'
   [255]
   $ hg graft --stop --log
   abort: cannot specify any other flag with '--stop'
   [255]
 
   $ hg graft --stop
   stopped the interrupted graft
   working directory is now at a0deacecd59d
 
   $ hg diff
 
   $ hg log -Gr '.'
   @  changeset:   4:a0deacecd59d
   |  tag:         tip
   ~  parent:      1:5f6d8a4bf34a
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     added foo to d
   
   $ hg graft -r 2 -r 3
   grafting 2:155349b645be "added c"
   grafting 3:9150fe93bec6 "added d"
   merging d
   warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ hg graft --stop
   stopped the interrupted graft
   working directory is now at 75b447541a9e
 
   $ hg diff
 
   $ hg log -G -T "{rev}:{node|short} {desc}"
   @  5:75b447541a9e added c
   |
   o  4:a0deacecd59d added foo to d
   |
   | o  3:9150fe93bec6 added d
   | |
   | o  2:155349b645be added c
   |/
   o  1:5f6d8a4bf34a added b
   |
   o  0:9092f1db7931 added a
   
   $ cd ..
 
 Testing the --abort flag for `hg graft` which aborts and rollback to state
 before the graft
 
   $ hg init abortgraft
   $ cd abortgraft
   $ for ch in a b c d; do echo $ch > $ch; hg add $ch; hg ci -Aqm "added "$ch; done;
 
   $ hg up '.^^'
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
   $ echo x > x
   $ hg ci -Aqm "added x"
   $ hg up '.^'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo foo > c
   $ hg ci -Aqm "added foo to c"
 
   $ hg log -GT "{rev}:{node|short} {desc}"
   @  5:36b793615f78 added foo to c
   |
   | o  4:863a25e1a9ea added x
   |/
   | o  3:9150fe93bec6 added d
   | |
   | o  2:155349b645be added c
   |/
   o  1:5f6d8a4bf34a added b
   |
   o  0:9092f1db7931 added a
   
   $ hg up 9150fe93bec6
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
-  $ hg graft --abort
-  abort: no interrupted graft to abort
+  $ hg abort
+  abort: no interrupted graft to abort (abortflag !)
+  abort: no operation in progress (abortcommand !)
   [255]
 
 when stripping is required
   $ hg graft -r 4 -r 5
   grafting 4:863a25e1a9ea "added x"
   grafting 5:36b793615f78 "added foo to c" (tip)
   merging c
   warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ hg graft --continue --abort
   abort: cannot use '--continue' and '--abort' together
   [255]
 
   $ hg graft --abort --stop
   abort: cannot use '--abort' and '--stop' together
   [255]
 
   $ hg graft --abort --currentuser
   abort: cannot specify any other flag with '--abort'
   [255]
 
   $ hg graft --abort --edit
   abort: cannot specify any other flag with '--abort'
   [255]
 
-  $ hg graft --abort
+#if abortcommand
+when in dry-run mode
+  $ hg abort --dry-run
+  graft in progress, will be aborted
+#endif
+
+  $ hg abort
   graft aborted
   working directory is now at 9150fe93bec6
   $ hg log -GT "{rev}:{node|short} {desc}"
   o  5:36b793615f78 added foo to c
   |
   | o  4:863a25e1a9ea added x
   |/
   | @  3:9150fe93bec6 added d
   | |
   | o  2:155349b645be added c
   |/
   o  1:5f6d8a4bf34a added b
   |
   o  0:9092f1db7931 added a
   
 when stripping is not required
   $ hg graft -r 5
   grafting 5:36b793615f78 "added foo to c" (tip)
   merging c
   warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
-  $ hg graft --abort
+  $ hg abort
   graft aborted
   working directory is now at 9150fe93bec6
   $ hg log -GT "{rev}:{node|short} {desc}"
   o  5:36b793615f78 added foo to c
   |
   | o  4:863a25e1a9ea added x
   |/
   | @  3:9150fe93bec6 added d
   | |
   | o  2:155349b645be added c
   |/
   o  1:5f6d8a4bf34a added b
   |
   o  0:9092f1db7931 added a
   
 when some of the changesets became public
 
   $ hg graft -r 4 -r 5
   grafting 4:863a25e1a9ea "added x"
   grafting 5:36b793615f78 "added foo to c" (tip)
   merging c
   warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ hg log -GT "{rev}:{node|short} {desc}"
   @  6:6ec71c037d94 added x
   |
   | o  5:36b793615f78 added foo to c
   | |
   | | o  4:863a25e1a9ea added x
   | |/
   o |  3:9150fe93bec6 added d
   | |
   o |  2:155349b645be added c
   |/
   o  1:5f6d8a4bf34a added b
   |
   o  0:9092f1db7931 added a
   
   $ hg phase -r 6 --public
 
-  $ hg graft --abort
+  $ hg abort
   cannot clean up public changesets 6ec71c037d94
   graft aborted
   working directory is now at 6ec71c037d94
 
 when we created new changesets on top of existing one
 
   $ hg up '.^^'
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ echo y > y
   $ hg ci -Aqm "added y"
   $ echo z > z
   $ hg ci -Aqm "added z"
 
   $ hg up 3
   1 files updated, 0 files merged, 3 files removed, 0 files unresolved
   $ hg log -GT "{rev}:{node|short} {desc}"
   o  8:637f9e9bbfd4 added z
   |
   o  7:123221671fd4 added y
   |
   | o  6:6ec71c037d94 added x
   | |
   | | o  5:36b793615f78 added foo to c
   | | |
   | | | o  4:863a25e1a9ea added x
   | | |/
   | @ |  3:9150fe93bec6 added d
   |/ /
   o /  2:155349b645be added c
   |/
   o  1:5f6d8a4bf34a added b
   |
   o  0:9092f1db7931 added a
   
   $ hg graft -r 8 -r 7 -r 5
   grafting 8:637f9e9bbfd4 "added z" (tip)
   grafting 7:123221671fd4 "added y"
   grafting 5:36b793615f78 "added foo to c"
   merging c
   warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ cd ..
   $ hg init pullrepo
   $ cd pullrepo
   $ cat >> .hg/hgrc <<EOF
   > [phases]
   > publish=False
   > EOF
   $ hg pull ../abortgraft --config phases.publish=False
   pulling from ../abortgraft
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 11 changesets with 9 changes to 8 files (+4 heads)
   new changesets 9092f1db7931:6b98ff0062dd (6 drafts)
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg up 9
   5 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo w > w
   $ hg ci -Aqm "added w" --config phases.publish=False
 
   $ cd ../abortgraft
   $ hg pull ../pullrepo
   pulling from ../pullrepo
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   new changesets 311dfc6cf3bf (1 drafts)
   (run 'hg heads .' to see heads, 'hg merge' to merge)
 
-  $ hg graft --abort
+  $ hg abort
   new changesets detected on destination branch, can't strip
   graft aborted
   working directory is now at 6b98ff0062dd
 
   $ cd ..
 
 ============================
 Testing --no-commit option:|
 ============================
 
   $ hg init nocommit
   $ cd nocommit
   $ echo a > a
   $ hg ci -qAma
   $ echo b > b
   $ hg ci -qAmb
   $ hg up -q 0
   $ echo c > c
   $ hg ci -qAmc
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  2:d36c0562f908 c
   |
   | o  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
 
 Check reporting when --no-commit used with non-applicable options:
 
   $ hg graft 1 --no-commit -e
   abort: cannot specify --no-commit and --edit together
   [255]
 
   $ hg graft 1 --no-commit --log
   abort: cannot specify --no-commit and --log together
   [255]
 
   $ hg graft 1 --no-commit -D
   abort: cannot specify --no-commit and --currentdate together
   [255]
 
 Test --no-commit is working:
   $ hg graft 1 --no-commit
   grafting 1:d2ae7f538514 "b"
 
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  2:d36c0562f908 c
   |
   | o  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
 
   $ hg diff
   diff -r d36c0562f908 b
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,1 @@
   +b
 
 Prepare wrdir to check --no-commit is resepected after --continue:
 
   $ hg up -qC
   $ echo A>a
   $ hg ci -qm "A in file a"
   $ hg up -q 1
   $ echo B>a
   $ hg ci -qm "B in file a"
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
   | o  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
   o |  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
 
   $ hg graft 3 --no-commit
   grafting 3:09e253b87e17 "A in file a"
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
 Resolve conflict:
   $ echo A>a
   $ hg resolve --mark
   (no more unresolved files)
   continue: hg graft --continue
 
   $ hg graft --continue
   grafting 3:09e253b87e17 "A in file a"
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
   | o  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
   o |  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
   $ hg diff
   diff -r 2aa9ad1006ff a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,1 @@
   -B
   +A
 
   $ hg up -qC
 
 Check --no-commit is resepected when passed with --continue:
 
   $ hg graft 3
   grafting 3:09e253b87e17 "A in file a"
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
 Resolve conflict:
   $ echo A>a
   $ hg resolve --mark
   (no more unresolved files)
   continue: hg graft --continue
 
   $ hg graft --continue --no-commit
   grafting 3:09e253b87e17 "A in file a"
   $ hg diff
   diff -r 2aa9ad1006ff a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,1 @@
   -B
   +A
 
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
   | o  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
   o |  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
   $ hg up -qC
 
 Test --no-commit when graft multiple revisions:
 When there is conflict:
   $ hg graft -r "2::3" --no-commit
   grafting 2:d36c0562f908 "c"
   grafting 3:09e253b87e17 "A in file a"
   merging a
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use 'hg resolve' and 'hg graft --continue')
   [255]
 
   $ echo A>a
   $ hg resolve --mark
   (no more unresolved files)
   continue: hg graft --continue
   $ hg graft --continue
   grafting 3:09e253b87e17 "A in file a"
   $ hg diff
   diff -r 2aa9ad1006ff a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,1 @@
   -B
   +A
   diff -r 2aa9ad1006ff c
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/c	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,1 @@
   +c
 
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
   | o  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
   o |  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
   $ hg up -qC
 
 When there is no conflict:
   $ echo d>d
   $ hg add d -q
   $ hg ci -qmd
   $ hg up 3 -q
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   o  5:baefa8927fc0 d
   |
   o  4:2aa9ad1006ff B in file a
   |
   | @  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
   o |  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
 
   $ hg graft -r 1 -r 5 --no-commit
   grafting 1:d2ae7f538514 "b"
   grafting 5:baefa8927fc0 "d" (tip)
   $ hg diff
   diff -r 09e253b87e17 b
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,1 @@
   +b
   diff -r 09e253b87e17 d
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/d	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,1 @@
   +d
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   o  5:baefa8927fc0 d
   |
   o  4:2aa9ad1006ff B in file a
   |
   | @  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
   o |  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
   $ cd ..