merge: add file ancestor linknode to mergestate

During a merge, each file has a current commitnode+filenode, an other
commitnode+filenode, and an ancestor commitnode+filenode. The ancestor
commitnode is not stored though, and we rely on the ability for the filectx() to
look up the commitnode by using the filenode's linkrev. In alternative backends
(like remotefilelog), linkrevs may have restriction that prevent arbitrary
linkrev look up given a filenode.

This patch accounts for that by storing the ancestor commitnode in
the merge state so that it is available later at resolve time.

This results in some test changes because the ancestor commitnode we're using at
resolve time changes slightly. Before, we used the linkrev commit, which is the
earliest commit that introduced that particular filenode (which may not be the
latest common ancestor of the commits being merged). Now we use the latest
common ancestor of the merged commits as the commitnode. This is fine though,
because that commit contains the same filenode as the linkrev'd commit.

mercurial/merge.py

@@ -1,1608 +1,1615 b''
 # merge.py - directory-level update/merge handling for Mercurial
 #
 # Copyright 2006, 2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import errno
 import os
 import shutil
 import struct
 
 from .i18n import _
 from .node import (
     bin,
     hex,
     nullhex,
     nullid,
     nullrev,
 )
 from . import (
     copies,
     destutil,
     error,
     filemerge,
     obsolete,
     scmutil,
     subrepo,
     util,
     worker,
 )
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 def _droponode(data):
     # used for compatibility for v1
     bits = data.split('\0')
     bits = bits[:-2] + bits[-1:]
     return '\0'.join(bits)
 
 class mergestate(object):
     '''track 3-way merge state of individual files
 
     The merge state is stored on disk when needed. Two files are used: one with
     an old format (version 1), and one with a new format (version 2). Version 2
     stores a superset of the data in version 1, including new kinds of records
     in the future. For more about the new format, see the documentation for
     `_readrecordsv2`.
 
     Each record can contain arbitrary content, and has an associated type. This
     `type` should be a letter. If `type` is uppercase, the record is mandatory:
     versions of Mercurial that don't support it should abort. If `type` is
     lowercase, the record can be safely ignored.
 
     Currently known records:
 
     L: the node of the "local" part of the merge (hexified version)
     O: the node of the "other" part of the merge (hexified version)
     F: a file to be merged entry
     C: a change/delete or delete/change conflict
     D: a file that the external merge driver will merge internally
        (experimental)
     m: the external merge driver defined for this merge plus its run state
        (experimental)
     f: a (filename, dictonary) tuple of optional values for a given file
     X: unsupported mandatory record type (used in tests)
     x: unsupported advisory record type (used in tests)
 
     Merge driver run states (experimental):
     u: driver-resolved files unmarked -- needs to be run next time we're about
        to resolve or commit
     m: driver-resolved files marked -- only needs to be run before commit
     s: success/skipped -- does not need to be run any more
 
     '''
     statepathv1 = 'merge/state'
     statepathv2 = 'merge/state2'
 
     @staticmethod
     def clean(repo, node=None, other=None):
         """Initialize a brand new merge state, removing any existing state on
         disk."""
         ms = mergestate(repo)
         ms.reset(node, other)
         return ms
 
     @staticmethod
     def read(repo):
         """Initialize the merge state, reading it from disk."""
         ms = mergestate(repo)
         ms._read()
         return ms
 
     def __init__(self, repo):
         """Initialize the merge state.
 
         Do not use this directly! Instead call read() or clean()."""
         self._repo = repo
         self._dirty = False
 
     def reset(self, node=None, other=None):
         self._state = {}
         self._stateextras = {}
         self._local = None
         self._other = None
         for var in ('localctx', 'otherctx'):
             if var in vars(self):
                 delattr(self, var)
         if node:
             self._local = node
             self._other = other
         self._readmergedriver = None
         if self.mergedriver:
             self._mdstate = 's'
         else:
             self._mdstate = 'u'
         shutil.rmtree(self._repo.join('merge'), True)
         self._results = {}
         self._dirty = False
 
     def _read(self):
         """Analyse each record content to restore a serialized state from disk
 
         This function process "record" entry produced by the de-serialization
         of on disk file.
         """
         self._state = {}
         self._stateextras = {}
         self._local = None
         self._other = None
         for var in ('localctx', 'otherctx'):
             if var in vars(self):
                 delattr(self, var)
         self._readmergedriver = None
         self._mdstate = 's'
         unsupported = set()
         records = self._readrecords()
         for rtype, record in records:
             if rtype == 'L':
                 self._local = bin(record)
             elif rtype == 'O':
                 self._other = bin(record)
             elif rtype == 'm':
                 bits = record.split('\0', 1)
                 mdstate = bits[1]
                 if len(mdstate) != 1 or mdstate not in 'ums':
                     # the merge driver should be idempotent, so just rerun it
                     mdstate = 'u'
 
                 self._readmergedriver = bits[0]
                 self._mdstate = mdstate
             elif rtype in 'FDC':
                 bits = record.split('\0')
                 self._state[bits[0]] = bits[1:]
             elif rtype == 'f':
                 filename, rawextras = record.split('\0', 1)
                 extraparts = rawextras.split('\0')
                 extras = {}
                 i = 0
                 while i < len(extraparts):
                     extras[extraparts[i]] = extraparts[i + 1]
                     i += 2
 
                 self._stateextras[filename] = extras
             elif not rtype.islower():
                 unsupported.add(rtype)
         self._results = {}
         self._dirty = False
 
         if unsupported:
             raise error.UnsupportedMergeRecords(unsupported)
 
     def _readrecords(self):
         """Read merge state from disk and return a list of record (TYPE, data)
 
         We read data from both v1 and v2 files and decide which one to use.
 
         V1 has been used by version prior to 2.9.1 and contains less data than
         v2. We read both versions and check if no data in v2 contradicts
         v1. If there is not contradiction we can safely assume that both v1
         and v2 were written at the same time and use the extract data in v2. If
         there is contradiction we ignore v2 content as we assume an old version
         of Mercurial has overwritten the mergestate file and left an old v2
         file around.
 
         returns list of record [(TYPE, data), ...]"""
         v1records = self._readrecordsv1()
         v2records = self._readrecordsv2()
         if self._v1v2match(v1records, v2records):
             return v2records
         else:
             # v1 file is newer than v2 file, use it
             # we have to infer the "other" changeset of the merge
             # we cannot do better than that with v1 of the format
             mctx = self._repo[None].parents()[-1]
             v1records.append(('O', mctx.hex()))
             # add place holder "other" file node information
             # nobody is using it yet so we do no need to fetch the data
             # if mctx was wrong `mctx[bits[-2]]` may fails.
             for idx, r in enumerate(v1records):
                 if r[0] == 'F':
                     bits = r[1].split('\0')
                     bits.insert(-2, '')
                     v1records[idx] = (r[0], '\0'.join(bits))
             return v1records
 
     def _v1v2match(self, v1records, v2records):
         oldv2 = set() # old format version of v2 record
         for rec in v2records:
             if rec[0] == 'L':
                 oldv2.add(rec)
             elif rec[0] == 'F':
                 # drop the onode data (not contained in v1)
                 oldv2.add(('F', _droponode(rec[1])))
         for rec in v1records:
             if rec not in oldv2:
                 return False
         else:
             return True
 
     def _readrecordsv1(self):
         """read on disk merge state for version 1 file
 
         returns list of record [(TYPE, data), ...]
 
         Note: the "F" data from this file are one entry short
               (no "other file node" entry)
         """
         records = []
         try:
             f = self._repo.vfs(self.statepathv1)
             for i, l in enumerate(f):
                 if i == 0:
                     records.append(('L', l[:-1]))
                 else:
                     records.append(('F', l[:-1]))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def _readrecordsv2(self):
         """read on disk merge state for version 2 file
 
         This format is a list of arbitrary records of the form:
 
           [type][length][content]
 
         `type` is a single character, `length` is a 4 byte integer, and
         `content` is an arbitrary byte sequence of length `length`.
 
         Mercurial versions prior to 3.7 have a bug where if there are
         unsupported mandatory merge records, attempting to clear out the merge
         state with hg update --clean or similar aborts. The 't' record type
         works around that by writing out what those versions treat as an
         advisory record, but later versions interpret as special: the first
         character is the 'real' record type and everything onwards is the data.
 
         Returns list of records [(TYPE, data), ...]."""
         records = []
         try:
             f = self._repo.vfs(self.statepathv2)
             data = f.read()
             off = 0
             end = len(data)
             while off < end:
                 rtype = data[off]
                 off += 1
                 length = _unpack('>I', data[off:(off + 4)])[0]
                 off += 4
                 record = data[off:(off + length)]
                 off += length
                 if rtype == 't':
                     rtype, record = record[0], record[1:]
                 records.append((rtype, record))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     @util.propertycache
     def mergedriver(self):
         # protect against the following:
         # - A configures a malicious merge driver in their hgrc, then
         #   pauses the merge
         # - A edits their hgrc to remove references to the merge driver
         # - A gives a copy of their entire repo, including .hg, to B
         # - B inspects .hgrc and finds it to be clean
         # - B then continues the merge and the malicious merge driver
         #  gets invoked
         configmergedriver = self._repo.ui.config('experimental', 'mergedriver')
         if (self._readmergedriver is not None
             and self._readmergedriver != configmergedriver):
             raise error.ConfigError(
                 _("merge driver changed since merge started"),
                 hint=_("revert merge driver change or abort merge"))
 
         return configmergedriver
 
     @util.propertycache
     def localctx(self):
         if self._local is None:
             raise RuntimeError("localctx accessed but self._local isn't set")
         return self._repo[self._local]
 
     @util.propertycache
     def otherctx(self):
         if self._other is None:
             raise RuntimeError("localctx accessed but self._local isn't set")
         return self._repo[self._other]
 
     def active(self):
         """Whether mergestate is active.
 
         Returns True if there appears to be mergestate. This is a rough proxy
         for "is a merge in progress."
         """
         # Check local variables before looking at filesystem for performance
         # reasons.
         return bool(self._local) or bool(self._state) or \
                self._repo.vfs.exists(self.statepathv1) or \
                self._repo.vfs.exists(self.statepathv2)
 
     def commit(self):
         """Write current state on disk (if necessary)"""
         if self._dirty:
             records = self._makerecords()
             self._writerecords(records)
             self._dirty = False
 
     def _makerecords(self):
         records = []
         records.append(('L', hex(self._local)))
         records.append(('O', hex(self._other)))
         if self.mergedriver:
             records.append(('m', '\0'.join([
                 self.mergedriver, self._mdstate])))
         for d, v in self._state.iteritems():
             if v[0] == 'd':
                 records.append(('D', '\0'.join([d] + v)))
             # v[1] == local ('cd'), v[6] == other ('dc') -- not supported by
             # older versions of Mercurial
             elif v[1] == nullhex or v[6] == nullhex:
                 records.append(('C', '\0'.join([d] + v)))
             else:
                 records.append(('F', '\0'.join([d] + v)))
         for filename, extras in sorted(self._stateextras.iteritems()):
             rawextras = '\0'.join('%s\0%s' % (k, v) for k, v in
                                   extras.iteritems())
             records.append(('f', '%s\0%s' % (filename, rawextras)))
         return records
 
     def _writerecords(self, records):
         """Write current state on disk (both v1 and v2)"""
         self._writerecordsv1(records)
         self._writerecordsv2(records)
 
     def _writerecordsv1(self, records):
         """Write current state on disk in a version 1 file"""
         f = self._repo.vfs(self.statepathv1, 'w')
         irecords = iter(records)
         lrecords = irecords.next()
         assert lrecords[0] == 'L'
         f.write(hex(self._local) + '\n')
         for rtype, data in irecords:
             if rtype == 'F':
                 f.write('%s\n' % _droponode(data))
         f.close()
 
     def _writerecordsv2(self, records):
         """Write current state on disk in a version 2 file
 
         See the docstring for _readrecordsv2 for why we use 't'."""
         # these are the records that all version 2 clients can read
         whitelist = 'LOF'
         f = self._repo.vfs(self.statepathv2, 'w')
         for key, data in records:
             assert len(key) == 1
             if key not in whitelist:
                 key, data = 't', '%s%s' % (key, data)
             format = '>sI%is' % len(data)
             f.write(_pack(format, key, len(data), data))
         f.close()
 
     def add(self, fcl, fco, fca, fd):
         """add a new (potentially?) conflicting file the merge state
         fcl: file context for local,
         fco: file context for remote,
         fca: file context for ancestors,
         fd:  file path of the resulting merge.
 
         note: also write the local version to the `.hg/merge` directory.
         """
         if fcl.isabsent():
             hash = nullhex
         else:
             hash = util.sha1(fcl.path()).hexdigest()
             self._repo.vfs.write('merge/' + hash, fcl.data())
         self._state[fd] = ['u', hash, fcl.path(),
                            fca.path(), hex(fca.filenode()),
                            fco.path(), hex(fco.filenode()),
                            fcl.flags()]
+        self._stateextras[fd] = { 'ancestorlinknode' : hex(fca.node()) }
         self._dirty = True
 
     def __contains__(self, dfile):
         return dfile in self._state
 
     def __getitem__(self, dfile):
         return self._state[dfile][0]
 
     def __iter__(self):
         return iter(sorted(self._state))
 
     def files(self):
         return self._state.keys()
 
     def mark(self, dfile, state):
         self._state[dfile][0] = state
         self._dirty = True
 
     def mdstate(self):
         return self._mdstate
 
     def unresolved(self):
         """Obtain the paths of unresolved files."""
 
         for f, entry in self._state.items():
             if entry[0] == 'u':
                 yield f
 
     def driverresolved(self):
         """Obtain the paths of driver-resolved files."""
 
         for f, entry in self._state.items():
             if entry[0] == 'd':
                 yield f
 
     def extras(self, filename):
         return self._stateextras.setdefault(filename, {})
 
     def _resolve(self, preresolve, dfile, wctx, labels=None):
         """rerun merge process for file path `dfile`"""
         if self[dfile] in 'rd':
             return True, 0
         stateentry = self._state[dfile]
         state, hash, lfile, afile, anode, ofile, onode, flags = stateentry
         octx = self._repo[self._other]
+        extras = self.extras(dfile)
+        anccommitnode = extras.get('ancestorlinknode')
+        if anccommitnode:
+            actx = self._repo[anccommitnode]
+        else:
+            actx = None
         fcd = self._filectxorabsent(hash, wctx, dfile)
         fco = self._filectxorabsent(onode, octx, ofile)
         # TODO: move this to filectxorabsent
-        fca = self._repo.filectx(afile, fileid=anode)
+        fca = self._repo.filectx(afile, fileid=anode, changeid=actx)
         # "premerge" x flags
         flo = fco.flags()
         fla = fca.flags()
         if 'x' in flags + flo + fla and 'l' not in flags + flo + fla:
             if fca.node() == nullid:
                 if preresolve:
                     self._repo.ui.warn(
                         _('warning: cannot merge flags for %s\n') % afile)
             elif flags == fla:
                 flags = flo
         if preresolve:
             # restore local
             if hash != nullhex:
                 f = self._repo.vfs('merge/' + hash)
                 self._repo.wwrite(dfile, f.read(), flags)
                 f.close()
             else:
                 self._repo.wvfs.unlinkpath(dfile, ignoremissing=True)
             complete, r, deleted = filemerge.premerge(self._repo, self._local,
                                                       lfile, fcd, fco, fca,
                                                       labels=labels)
         else:
             complete, r, deleted = filemerge.filemerge(self._repo, self._local,
                                                        lfile, fcd, fco, fca,
                                                        labels=labels)
         if r is None:
             # no real conflict
             del self._state[dfile]
             self._stateextras.pop(dfile, None)
             self._dirty = True
         elif not r:
             self.mark(dfile, 'r')
 
         if complete:
             action = None
             if deleted:
                 if fcd.isabsent():
                     # dc: local picked. Need to drop if present, which may
                     # happen on re-resolves.
                     action = 'f'
                 else:
                     # cd: remote picked (or otherwise deleted)
                     action = 'r'
             else:
                 if fcd.isabsent(): # dc: remote picked
                     action = 'g'
                 elif fco.isabsent(): # cd: local picked
                     if dfile in self.localctx:
                         action = 'am'
                     else:
                         action = 'a'
                 # else: regular merges (no action necessary)
             self._results[dfile] = r, action
 
         return complete, r
 
     def _filectxorabsent(self, hexnode, ctx, f):
         if hexnode == nullhex:
             return filemerge.absentfilectx(ctx, f)
         else:
             return ctx[f]
 
     def preresolve(self, dfile, wctx, labels=None):
         """run premerge process for dfile
 
         Returns whether the merge is complete, and the exit code."""
         return self._resolve(True, dfile, wctx, labels=labels)
 
     def resolve(self, dfile, wctx, labels=None):
         """run merge process (assuming premerge was run) for dfile
 
         Returns the exit code of the merge."""
         return self._resolve(False, dfile, wctx, labels=labels)[1]
 
     def counts(self):
         """return counts for updated, merged and removed files in this
         session"""
         updated, merged, removed = 0, 0, 0
         for r, action in self._results.itervalues():
             if r is None:
                 updated += 1
             elif r == 0:
                 if action == 'r':
                     removed += 1
                 else:
                     merged += 1
         return updated, merged, removed
 
     def unresolvedcount(self):
         """get unresolved count for this merge (persistent)"""
         return len([True for f, entry in self._state.iteritems()
                     if entry[0] == 'u'])
 
     def actions(self):
         """return lists of actions to perform on the dirstate"""
         actions = {'r': [], 'f': [], 'a': [], 'am': [], 'g': []}
         for f, (r, action) in self._results.iteritems():
             if action is not None:
                 actions[action].append((f, None, "merge result"))
         return actions
 
     def recordactions(self):
         """record remove/add/get actions in the dirstate"""
         branchmerge = self._repo.dirstate.p2() != nullid
         recordupdates(self._repo, self.actions(), branchmerge)
 
     def queueremove(self, f):
         """queues a file to be removed from the dirstate
 
         Meant for use by custom merge drivers."""
         self._results[f] = 0, 'r'
 
     def queueadd(self, f):
         """queues a file to be added to the dirstate
 
         Meant for use by custom merge drivers."""
         self._results[f] = 0, 'a'
 
     def queueget(self, f):
         """queues a file to be marked modified in the dirstate
 
         Meant for use by custom merge drivers."""
         self._results[f] = 0, 'g'
 
 def _getcheckunknownconfig(repo, section, name):
     config = repo.ui.config(section, name, default='abort')
     valid = ['abort', 'ignore', 'warn']
     if config not in valid:
         validstr = ', '.join(["'" + v + "'" for v in valid])
         raise error.ConfigError(_("%s.%s not valid "
                                   "('%s' is none of %s)")
                                 % (section, name, config, validstr))
     return config
 
 def _checkunknownfile(repo, wctx, mctx, f, f2=None):
     if f2 is None:
         f2 = f
     return (repo.wvfs.isfileorlink(f)
         and repo.wvfs.audit.check(f)
         and repo.dirstate.normalize(f) not in repo.dirstate
         and mctx[f2].cmp(wctx[f]))
 
 def _checkunknownfiles(repo, wctx, mctx, force, actions):
     """
     Considers any actions that care about the presence of conflicting unknown
     files. For some actions, the result is to abort; for others, it is to
     choose a different action.
     """
     conflicts = set()
     if not force:
         abortconflicts = set()
         warnconflicts = set()
         def collectconflicts(conflicts, config):
             if config == 'abort':
                 abortconflicts.update(conflicts)
             elif config == 'warn':
                 warnconflicts.update(conflicts)
 
         unknownconfig = _getcheckunknownconfig(repo, 'merge', 'checkunknown')
         ignoredconfig = _getcheckunknownconfig(repo, 'merge', 'checkignored')
         for f, (m, args, msg) in actions.iteritems():
             if m in ('c', 'dc'):
                 if _checkunknownfile(repo, wctx, mctx, f):
                     conflicts.add(f)
             elif m == 'dg':
                 if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                     conflicts.add(f)
 
         ignoredconflicts = set([c for c in conflicts
                                 if repo.dirstate._ignore(c)])
         unknownconflicts = conflicts - ignoredconflicts
         collectconflicts(ignoredconflicts, ignoredconfig)
         collectconflicts(unknownconflicts, unknownconfig)
         for f in sorted(abortconflicts):
             repo.ui.warn(_("%s: untracked file differs\n") % f)
         if abortconflicts:
             raise error.Abort(_("untracked files in working directory "
                                 "differ from files in requested revision"))
 
         for f in sorted(warnconflicts):
             repo.ui.warn(_("%s: replacing untracked file\n") % f)
 
     for f, (m, args, msg) in actions.iteritems():
         backup = f in conflicts
         if m == 'c':
             flags, = args
             actions[f] = ('g', (flags, backup), msg)
         elif m == 'cm':
             fl2, anc = args
             different = _checkunknownfile(repo, wctx, mctx, f)
             if different:
                 actions[f] = ('m', (f, f, None, False, anc),
                               "remote differs from untracked local")
             else:
                 actions[f] = ('g', (fl2, backup), "remote created")
 
 def _forgetremoved(wctx, mctx, branchmerge):
     """
     Forget removed files
 
     If we're jumping between revisions (as opposed to merging), and if
     neither the working directory nor the target rev has the file,
     then we need to remove it from the dirstate, to prevent the
     dirstate from listing the file when it is no longer in the
     manifest.
 
     If we're merging, and the other revision has removed a file
     that is not present in the working directory, we need to mark it
     as removed.
     """
 
     actions = {}
     m = 'f'
     if branchmerge:
         m = 'r'
     for f in wctx.deleted():
         if f not in mctx:
             actions[f] = m, None, "forget deleted"
 
     if not branchmerge:
         for f in wctx.removed():
             if f not in mctx:
                 actions[f] = 'f', None, "forget removed"
 
     return actions
 
 def _checkcollision(repo, wmf, actions):
     # build provisional merged manifest up
     pmmf = set(wmf)
 
     if actions:
         # k, dr, e and rd are no-op
         for m in 'a', 'am', 'f', 'g', 'cd', 'dc':
             for f, args, msg in actions[m]:
                 pmmf.add(f)
         for f, args, msg in actions['r']:
             pmmf.discard(f)
         for f, args, msg in actions['dm']:
             f2, flags = args
             pmmf.discard(f2)
             pmmf.add(f)
         for f, args, msg in actions['dg']:
             pmmf.add(f)
         for f, args, msg in actions['m']:
             f1, f2, fa, move, anc = args
             if move:
                 pmmf.discard(f1)
             pmmf.add(f)
 
     # check case-folding collision in provisional merged manifest
     foldmap = {}
     for f in sorted(pmmf):
         fold = util.normcase(f)
         if fold in foldmap:
             raise error.Abort(_("case-folding collision between %s and %s")
                              % (f, foldmap[fold]))
         foldmap[fold] = f
 
     # check case-folding of directories
     foldprefix = unfoldprefix = lastfull = ''
     for fold, f in sorted(foldmap.items()):
         if fold.startswith(foldprefix) and not f.startswith(unfoldprefix):
             # the folded prefix matches but actual casing is different
             raise error.Abort(_("case-folding collision between "
                                 "%s and directory of %s") % (lastfull, f))
         foldprefix = fold + '/'
         unfoldprefix = f + '/'
         lastfull = f
 
 def driverpreprocess(repo, ms, wctx, labels=None):
     """run the preprocess step of the merge driver, if any
 
     This is currently not implemented -- it's an extension point."""
     return True
 
 def driverconclude(repo, ms, wctx, labels=None):
     """run the conclude step of the merge driver, if any
 
     This is currently not implemented -- it's an extension point."""
     return True
 
 def manifestmerge(repo, wctx, p2, pa, branchmerge, force, matcher,
                   acceptremote, followcopies):
     """
     Merge p1 and p2 with ancestor pa and generate merge action list
 
     branchmerge and force are as passed in to update
     matcher = matcher to filter file lists
     acceptremote = accept the incoming changes without prompting
     """
     if matcher is not None and matcher.always():
         matcher = None
 
     copy, movewithdir, diverge, renamedelete = {}, {}, {}, {}
 
     # manifests fetched in order are going to be faster, so prime the caches
     [x.manifest() for x in
      sorted(wctx.parents() + [p2, pa], key=lambda x: x.rev())]
 
     if followcopies:
         ret = copies.mergecopies(repo, wctx, p2, pa)
         copy, movewithdir, diverge, renamedelete = ret
 
     repo.ui.note(_("resolving manifests\n"))
     repo.ui.debug(" branchmerge: %s, force: %s, partial: %s\n"
                   % (bool(branchmerge), bool(force), bool(matcher)))
     repo.ui.debug(" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
 
     m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
     copied = set(copy.values())
     copied.update(movewithdir.values())
 
     if '.hgsubstate' in m1:
         # check whether sub state is modified
         for s in sorted(wctx.substate):
             if wctx.sub(s).dirty():
                 m1['.hgsubstate'] += '+'
                 break
 
     # Compare manifests
     if matcher is not None:
         m1 = m1.matches(matcher)
         m2 = m2.matches(matcher)
     diff = m1.diff(m2)
 
     actions = {}
     for f, ((n1, fl1), (n2, fl2)) in diff.iteritems():
         if n1 and n2: # file exists on both local and remote side
             if f not in ma:
                 fa = copy.get(f, None)
                 if fa is not None:
                     actions[f] = ('m', (f, f, fa, False, pa.node()),
                                   "both renamed from " + fa)
                 else:
                     actions[f] = ('m', (f, f, None, False, pa.node()),
                                   "both created")
             else:
                 a = ma[f]
                 fla = ma.flags(f)
                 nol = 'l' not in fl1 + fl2 + fla
                 if n2 == a and fl2 == fla:
                     actions[f] = ('k' , (), "remote unchanged")
                 elif n1 == a and fl1 == fla: # local unchanged - use remote
                     if n1 == n2: # optimization: keep local content
                         actions[f] = ('e', (fl2,), "update permissions")
                     else:
                         actions[f] = ('g', (fl2, False), "remote is newer")
                 elif nol and n2 == a: # remote only changed 'x'
                     actions[f] = ('e', (fl2,), "update permissions")
                 elif nol and n1 == a: # local only changed 'x'
                     actions[f] = ('g', (fl1, False), "remote is newer")
                 else: # both changed something
                     actions[f] = ('m', (f, f, f, False, pa.node()),
                                    "versions differ")
         elif n1: # file exists only on local side
             if f in copied:
                 pass # we'll deal with it on m2 side
             elif f in movewithdir: # directory rename, move local
                 f2 = movewithdir[f]
                 if f2 in m2:
                     actions[f2] = ('m', (f, f2, None, True, pa.node()),
                                    "remote directory rename, both created")
                 else:
                     actions[f2] = ('dm', (f, fl1),
                                    "remote directory rename - move from " + f)
             elif f in copy:
                 f2 = copy[f]
                 actions[f] = ('m', (f, f2, f2, False, pa.node()),
                               "local copied/moved from " + f2)
             elif f in ma: # clean, a different, no remote
                 if n1 != ma[f]:
                     if acceptremote:
                         actions[f] = ('r', None, "remote delete")
                     else:
                         actions[f] = ('cd', (f, None, f, False, pa.node()),
                                       "prompt changed/deleted")
                 elif n1[20:] == 'a':
                     # This extra 'a' is added by working copy manifest to mark
                     # the file as locally added. We should forget it instead of
                     # deleting it.
                     actions[f] = ('f', None, "remote deleted")
                 else:
                     actions[f] = ('r', None, "other deleted")
         elif n2: # file exists only on remote side
             if f in copied:
                 pass # we'll deal with it on m1 side
             elif f in movewithdir:
                 f2 = movewithdir[f]
                 if f2 in m1:
                     actions[f2] = ('m', (f2, f, None, False, pa.node()),
                                    "local directory rename, both created")
                 else:
                     actions[f2] = ('dg', (f, fl2),
                                    "local directory rename - get from " + f)
             elif f in copy:
                 f2 = copy[f]
                 if f2 in m2:
                     actions[f] = ('m', (f2, f, f2, False, pa.node()),
                                   "remote copied from " + f2)
                 else:
                     actions[f] = ('m', (f2, f, f2, True, pa.node()),
                                   "remote moved from " + f2)
             elif f not in ma:
                 # local unknown, remote created: the logic is described by the
                 # following table:
                 #
                 # force  branchmerge  different  |  action
                 #   n         *           *      |   create
                 #   y         n           *      |   create
                 #   y         y           n      |   create
                 #   y         y           y      |   merge
                 #
                 # Checking whether the files are different is expensive, so we
                 # don't do that when we can avoid it.
                 if not force:
                     actions[f] = ('c', (fl2,), "remote created")
                 elif not branchmerge:
                     actions[f] = ('c', (fl2,), "remote created")
                 else:
                     actions[f] = ('cm', (fl2, pa.node()),
                                   "remote created, get or merge")
             elif n2 != ma[f]:
                 if acceptremote:
                     actions[f] = ('c', (fl2,), "remote recreating")
                 else:
                     actions[f] = ('dc', (None, f, f, False, pa.node()),
                                   "prompt deleted/changed")
 
     return actions, diverge, renamedelete
 
 def _resolvetrivial(repo, wctx, mctx, ancestor, actions):
     """Resolves false conflicts where the nodeid changed but the content
        remained the same."""
 
     for f, (m, args, msg) in actions.items():
         if m == 'cd' and f in ancestor and not wctx[f].cmp(ancestor[f]):
             # local did change but ended up with same content
             actions[f] = 'r', None, "prompt same"
         elif m == 'dc' and f in ancestor and not mctx[f].cmp(ancestor[f]):
             # remote did change but ended up with same content
             del actions[f] # don't get = keep local deleted
 
 def calculateupdates(repo, wctx, mctx, ancestors, branchmerge, force,
                      acceptremote, followcopies, matcher=None):
     "Calculate the actions needed to merge mctx into wctx using ancestors"
     if len(ancestors) == 1: # default
         actions, diverge, renamedelete = manifestmerge(
             repo, wctx, mctx, ancestors[0], branchmerge, force, matcher,
             acceptremote, followcopies)
         _checkunknownfiles(repo, wctx, mctx, force, actions)
 
     else: # only when merge.preferancestor=* - the default
         repo.ui.note(
             _("note: merging %s and %s using bids from ancestors %s\n") %
             (wctx, mctx, _(' and ').join(str(anc) for anc in ancestors)))
 
         # Call for bids
         fbids = {} # mapping filename to bids (action method to list af actions)
         diverge, renamedelete = None, None
         for ancestor in ancestors:
             repo.ui.note(_('\ncalculating bids for ancestor %s\n') % ancestor)
             actions, diverge1, renamedelete1 = manifestmerge(
                 repo, wctx, mctx, ancestor, branchmerge, force, matcher,
                 acceptremote, followcopies)
             _checkunknownfiles(repo, wctx, mctx, force, actions)
 
             # Track the shortest set of warning on the theory that bid
             # merge will correctly incorporate more information
             if diverge is None or len(diverge1) < len(diverge):
                 diverge = diverge1
             if renamedelete is None or len(renamedelete) < len(renamedelete1):
                 renamedelete = renamedelete1
 
             for f, a in sorted(actions.iteritems()):
                 m, args, msg = a
                 repo.ui.debug(' %s: %s -> %s\n' % (f, msg, m))
                 if f in fbids:
                     d = fbids[f]
                     if m in d:
                         d[m].append(a)
                     else:
                         d[m] = [a]
                 else:
                     fbids[f] = {m: [a]}
 
         # Pick the best bid for each file
         repo.ui.note(_('\nauction for merging merge bids\n'))
         actions = {}
         for f, bids in sorted(fbids.items()):
             # bids is a mapping from action method to list af actions
             # Consensus?
             if len(bids) == 1: # all bids are the same kind of method
                 m, l = bids.items()[0]
                 if all(a == l[0] for a in l[1:]): # len(bids) is > 1
                     repo.ui.note(" %s: consensus for %s\n" % (f, m))
                     actions[f] = l[0]
                     continue
             # If keep is an option, just do it.
             if 'k' in bids:
                 repo.ui.note(" %s: picking 'keep' action\n" % f)
                 actions[f] = bids['k'][0]
                 continue
             # If there are gets and they all agree [how could they not?], do it.
             if 'g' in bids:
                 ga0 = bids['g'][0]
                 if all(a == ga0 for a in bids['g'][1:]):
                     repo.ui.note(" %s: picking 'get' action\n" % f)
                     actions[f] = ga0
                     continue
             # TODO: Consider other simple actions such as mode changes
             # Handle inefficient democrazy.
             repo.ui.note(_(' %s: multiple bids for merge action:\n') % f)
             for m, l in sorted(bids.items()):
                 for _f, args, msg in l:
                     repo.ui.note('  %s -> %s\n' % (msg, m))
             # Pick random action. TODO: Instead, prompt user when resolving
             m, l = bids.items()[0]
             repo.ui.warn(_(' %s: ambiguous merge - picked %s action\n') %
                          (f, m))
             actions[f] = l[0]
             continue
         repo.ui.note(_('end of auction\n\n'))
 
     _resolvetrivial(repo, wctx, mctx, ancestors[0], actions)
 
     if wctx.rev() is None:
         fractions = _forgetremoved(wctx, mctx, branchmerge)
         actions.update(fractions)
 
     return actions, diverge, renamedelete
 
 def batchremove(repo, actions):
     """apply removes to the working directory
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     unlink = util.unlinkpath
     wjoin = repo.wjoin
     audit = repo.wvfs.audit
     i = 0
     for f, args, msg in actions:
         repo.ui.debug(" %s: %s -> r\n" % (f, msg))
         if verbose:
             repo.ui.note(_("removing %s\n") % f)
         audit(f)
         try:
             unlink(wjoin(f), ignoremissing=True)
         except OSError as inst:
             repo.ui.warn(_("update failed to remove %s: %s!\n") %
                          (f, inst.strerror))
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
 def batchget(repo, mctx, actions):
     """apply gets to the working directory
 
     mctx is the context to get from
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     fctx = mctx.filectx
     wwrite = repo.wwrite
     ui = repo.ui
     i = 0
     for f, (flags, backup), msg in actions:
         repo.ui.debug(" %s: %s -> g\n" % (f, msg))
         if verbose:
             repo.ui.note(_("getting %s\n") % f)
 
         if backup:
             absf = repo.wjoin(f)
             orig = scmutil.origpath(ui, repo, absf)
             try:
                 # TODO Mercurial has always aborted if an untracked directory
                 # is replaced by a tracked file, or generally with
                 # file/directory merges. This needs to be sorted out.
                 if repo.wvfs.isfileorlink(f):
                     util.rename(absf, orig)
             except OSError as e:
                 if e.errno != errno.ENOENT:
                     raise
 
         wwrite(f, fctx(f).data(), flags)
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
 def applyupdates(repo, actions, wctx, mctx, overwrite, labels=None):
     """apply the merge action list to the working directory
 
     wctx is the working copy context
     mctx is the context to be merged into the working copy
 
     Return a tuple of counts (updated, merged, removed, unresolved) that
     describes how many files were affected by the update.
     """
 
     updated, merged, removed = 0, 0, 0
     ms = mergestate.clean(repo, wctx.p1().node(), mctx.node())
     moves = []
     for m, l in actions.items():
         l.sort()
 
     # 'cd' and 'dc' actions are treated like other merge conflicts
     mergeactions = sorted(actions['cd'])
     mergeactions.extend(sorted(actions['dc']))
     mergeactions.extend(actions['m'])
     for f, args, msg in mergeactions:
         f1, f2, fa, move, anc = args
         if f == '.hgsubstate': # merged internally
             continue
         if f1 is None:
             fcl = filemerge.absentfilectx(wctx, fa)
         else:
             repo.ui.debug(" preserving %s for resolve of %s\n" % (f1, f))
             fcl = wctx[f1]
         if f2 is None:
             fco = filemerge.absentfilectx(mctx, fa)
         else:
             fco = mctx[f2]
         actx = repo[anc]
         if fa in actx:
             fca = actx[fa]
         else:
             # TODO: move to absentfilectx
             fca = repo.filectx(f1, fileid=nullrev)
         ms.add(fcl, fco, fca, f)
         if f1 != f and move:
             moves.append(f1)
 
     audit = repo.wvfs.audit
     _updating = _('updating')
     _files = _('files')
     progress = repo.ui.progress
 
     # remove renamed files after safely stored
     for f in moves:
         if os.path.lexists(repo.wjoin(f)):
             repo.ui.debug("removing %s\n" % f)
             audit(f)
             util.unlinkpath(repo.wjoin(f))
 
     numupdates = sum(len(l) for m, l in actions.items() if m != 'k')
 
     if [a for a in actions['r'] if a[0] == '.hgsubstate']:
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
 
     # remove in parallel (must come first)
     z = 0
     prog = worker.worker(repo.ui, 0.001, batchremove, (repo,), actions['r'])
     for i, item in prog:
         z += i
         progress(_updating, z, item=item, total=numupdates, unit=_files)
     removed = len(actions['r'])
 
     # get in parallel
     prog = worker.worker(repo.ui, 0.001, batchget, (repo, mctx), actions['g'])
     for i, item in prog:
         z += i
         progress(_updating, z, item=item, total=numupdates, unit=_files)
     updated = len(actions['g'])
 
     if [a for a in actions['g'] if a[0] == '.hgsubstate']:
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
 
     # forget (manifest only, just log it) (must come first)
     for f, args, msg in actions['f']:
         repo.ui.debug(" %s: %s -> f\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
 
     # re-add (manifest only, just log it)
     for f, args, msg in actions['a']:
         repo.ui.debug(" %s: %s -> a\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
 
     # re-add/mark as modified (manifest only, just log it)
     for f, args, msg in actions['am']:
         repo.ui.debug(" %s: %s -> am\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
 
     # keep (noop, just log it)
     for f, args, msg in actions['k']:
         repo.ui.debug(" %s: %s -> k\n" % (f, msg))
         # no progress
 
     # directory rename, move local
     for f, args, msg in actions['dm']:
         repo.ui.debug(" %s: %s -> dm\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         f0, flags = args
         repo.ui.note(_("moving %s to %s\n") % (f0, f))
         audit(f)
         repo.wwrite(f, wctx.filectx(f0).data(), flags)
         util.unlinkpath(repo.wjoin(f0))
         updated += 1
 
     # local directory rename, get
     for f, args, msg in actions['dg']:
         repo.ui.debug(" %s: %s -> dg\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         f0, flags = args
         repo.ui.note(_("getting %s to %s\n") % (f0, f))
         repo.wwrite(f, mctx.filectx(f0).data(), flags)
         updated += 1
 
     # exec
     for f, args, msg in actions['e']:
         repo.ui.debug(" %s: %s -> e\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         flags, = args
         audit(f)
         util.setflags(repo.wjoin(f), 'l' in flags, 'x' in flags)
         updated += 1
 
     # the ordering is important here -- ms.mergedriver will raise if the merge
     # driver has changed, and we want to be able to bypass it when overwrite is
     # True
     usemergedriver = not overwrite and mergeactions and ms.mergedriver
 
     if usemergedriver:
         ms.commit()
         proceed = driverpreprocess(repo, ms, wctx, labels=labels)
         # the driver might leave some files unresolved
         unresolvedf = set(ms.unresolved())
         if not proceed:
             # XXX setting unresolved to at least 1 is a hack to make sure we
             # error out
             return updated, merged, removed, max(len(unresolvedf), 1)
         newactions = []
         for f, args, msg in mergeactions:
             if f in unresolvedf:
                 newactions.append((f, args, msg))
         mergeactions = newactions
 
     # premerge
     tocomplete = []
     for f, args, msg in mergeactions:
         repo.ui.debug(" %s: %s -> m (premerge)\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         if f == '.hgsubstate': # subrepo states need updating
             subrepo.submerge(repo, wctx, mctx, wctx.ancestor(mctx),
                              overwrite)
             continue
         audit(f)
         complete, r = ms.preresolve(f, wctx, labels=labels)
         if not complete:
             numupdates += 1
             tocomplete.append((f, args, msg))
 
     # merge
     for f, args, msg in tocomplete:
         repo.ui.debug(" %s: %s -> m (merge)\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         ms.resolve(f, wctx, labels=labels)
 
     ms.commit()
 
     unresolved = ms.unresolvedcount()
 
     if usemergedriver and not unresolved and ms.mdstate() != 's':
         if not driverconclude(repo, ms, wctx, labels=labels):
             # XXX setting unresolved to at least 1 is a hack to make sure we
             # error out
             unresolved = max(unresolved, 1)
 
         ms.commit()
 
     msupdated, msmerged, msremoved = ms.counts()
     updated += msupdated
     merged += msmerged
     removed += msremoved
 
     extraactions = ms.actions()
     for k, acts in extraactions.iteritems():
         actions[k].extend(acts)
 
     progress(_updating, None, total=numupdates, unit=_files)
 
     return updated, merged, removed, unresolved
 
 def recordupdates(repo, actions, branchmerge):
     "record merge actions to the dirstate"
     # remove (must come first)
     for f, args, msg in actions.get('r', []):
         if branchmerge:
             repo.dirstate.remove(f)
         else:
             repo.dirstate.drop(f)
 
     # forget (must come first)
     for f, args, msg in actions.get('f', []):
         repo.dirstate.drop(f)
 
     # re-add
     for f, args, msg in actions.get('a', []):
         repo.dirstate.add(f)
 
     # re-add/mark as modified
     for f, args, msg in actions.get('am', []):
         if branchmerge:
             repo.dirstate.normallookup(f)
         else:
             repo.dirstate.add(f)
 
     # exec change
     for f, args, msg in actions.get('e', []):
         repo.dirstate.normallookup(f)
 
     # keep
     for f, args, msg in actions.get('k', []):
         pass
 
     # get
     for f, args, msg in actions.get('g', []):
         if branchmerge:
             repo.dirstate.otherparent(f)
         else:
             repo.dirstate.normal(f)
 
     # merge
     for f, args, msg in actions.get('m', []):
         f1, f2, fa, move, anc = args
         if branchmerge:
             # We've done a branch merge, mark this file as merged
             # so that we properly record the merger later
             repo.dirstate.merge(f)
             if f1 != f2: # copy/rename
                 if move:
                     repo.dirstate.remove(f1)
                 if f1 != f:
                     repo.dirstate.copy(f1, f)
                 else:
                     repo.dirstate.copy(f2, f)
         else:
             # We've update-merged a locally modified file, so
             # we set the dirstate to emulate a normal checkout
             # of that file some time in the past. Thus our
             # merge will appear as a normal local file
             # modification.
             if f2 == f: # file not locally copied/moved
                 repo.dirstate.normallookup(f)
             if move:
                 repo.dirstate.drop(f1)
 
     # directory rename, move local
     for f, args, msg in actions.get('dm', []):
         f0, flag = args
         if branchmerge:
             repo.dirstate.add(f)
             repo.dirstate.remove(f0)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.normal(f)
             repo.dirstate.drop(f0)
 
     # directory rename, get
     for f, args, msg in actions.get('dg', []):
         f0, flag = args
         if branchmerge:
             repo.dirstate.add(f)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.normal(f)
 
 def update(repo, node, branchmerge, force, ancestor=None,
            mergeancestor=False, labels=None, matcher=None):
     """
     Perform a merge between the working directory and the given node
 
     node = the node to update to, or None if unspecified
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     matcher = a matcher to filter file lists (dirstate not updated)
     mergeancestor = whether it is merging with an ancestor. If true,
       we should accept the incoming changes for any prompts that occur.
       If false, merging with an ancestor (fast-forward) is only allowed
       between different named branches. This flag is used by rebase extension
       as a temporary fix and should be avoided in general.
 
     The table below shows all the behaviors of the update command
     given the -c and -C or no options, whether the working directory
     is dirty, whether a revision is specified, and the relationship of
     the parent rev to the target rev (linear, on the same named
     branch, or on another named branch).
 
     This logic is tested by test-update-branches.t.
 
     -c  -C  dirty  rev  |  linear      same    cross
      n   n    n     n   |    ok        (1)       x
      n   n    n     y   |    ok        ok       ok
      n   n    y     n   |   merge      (2)      (2)
      n   n    y     y   |   merge      (3)      (3)
      n   y    *     *   |   discard   discard   discard
      y   n    y     *   |    (4)       (4)      (4)
      y   n    n     *   |    ok        ok       ok
      y   y    *     *   |    (5)       (5)      (5)
 
     x = can't happen
     * = don't-care
     1 = abort: not a linear update (merge or update --check to force update)
     2 = abort: uncommitted changes (commit and merge, or update --clean to
                  discard changes)
     3 = abort: uncommitted changes (commit or update --clean to discard changes)
     4 = abort: uncommitted changes (checked in commands.py)
     5 = incompatible options (checked in commands.py)
 
     Return the same tuple as applyupdates().
     """
 
     onode = node
     # If we're doing a partial update, we need to skip updating
     # the dirstate, so make a note of any partial-ness to the
     # update here.
     if matcher is None or matcher.always():
         partial = False
     else:
         partial = True
     with repo.wlock():
         wc = repo[None]
         pl = wc.parents()
         p1 = pl[0]
         pas = [None]
         if ancestor is not None:
             pas = [repo[ancestor]]
 
         if node is None:
             if (repo.ui.configbool('devel', 'all-warnings')
                     or repo.ui.configbool('devel', 'oldapi')):
                 repo.ui.develwarn('update with no target')
             rev, _mark, _act = destutil.destupdate(repo)
             node = repo[rev].node()
 
         overwrite = force and not branchmerge
 
         p2 = repo[node]
         if pas[0] is None:
             if repo.ui.configlist('merge', 'preferancestor', ['*']) == ['*']:
                 cahs = repo.changelog.commonancestorsheads(p1.node(), p2.node())
                 pas = [repo[anc] for anc in (sorted(cahs) or [nullid])]
             else:
                 pas = [p1.ancestor(p2, warn=branchmerge)]
 
         fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2)
 
         ### check phase
         if not overwrite:
             if len(pl) > 1:
                 raise error.Abort(_("outstanding uncommitted merge"))
             ms = mergestate.read(repo)
             if list(ms.unresolved()):
                 raise error.Abort(_("outstanding merge conflicts"))
         if branchmerge:
             if pas == [p2]:
                 raise error.Abort(_("merging with a working directory ancestor"
                                    " has no effect"))
             elif pas == [p1]:
                 if not mergeancestor and p1.branch() == p2.branch():
                     raise error.Abort(_("nothing to merge"),
                                      hint=_("use 'hg update' "
                                             "or check 'hg heads'"))
             if not force and (wc.files() or wc.deleted()):
                 raise error.Abort(_("uncommitted changes"),
                                  hint=_("use 'hg status' to list changes"))
             for s in sorted(wc.substate):
                 wc.sub(s).bailifchanged()
 
         elif not overwrite:
             if p1 == p2: # no-op update
                 # call the hooks and exit early
                 repo.hook('preupdate', throw=True, parent1=xp2, parent2='')
                 repo.hook('update', parent1=xp2, parent2='', error=0)
                 return 0, 0, 0, 0
 
             if pas not in ([p1], [p2]):  # nonlinear
                 dirty = wc.dirty(missing=True)
                 if dirty or onode is None:
                     # Branching is a bit strange to ensure we do the minimal
                     # amount of call to obsolete.background.
                     foreground = obsolete.foreground(repo, [p1.node()])
                     # note: the <node> variable contains a random identifier
                     if repo[node].node() in foreground:
                         pas = [p1]  # allow updating to successors
                     elif dirty:
                         msg = _("uncommitted changes")
                         if onode is None:
                             hint = _("commit and merge, or update --clean to"
                                      " discard changes")
                         else:
                             hint = _("commit or update --clean to discard"
                                      " changes")
                         raise error.Abort(msg, hint=hint)
                     else:  # node is none
                         msg = _("not a linear update")
                         hint = _("merge or update --check to force update")
                         raise error.Abort(msg, hint=hint)
                 else:
                     # Allow jumping branches if clean and specific rev given
                     pas = [p1]
 
         # deprecated config: merge.followcopies
         followcopies = False
         if overwrite:
             pas = [wc]
         elif pas == [p2]: # backwards
             pas = [wc.p1()]
         elif not branchmerge and not wc.dirty(missing=True):
             pass
         elif pas[0] and repo.ui.configbool('merge', 'followcopies', True):
             followcopies = True
 
         ### calculate phase
         actionbyfile, diverge, renamedelete = calculateupdates(
             repo, wc, p2, pas, branchmerge, force, mergeancestor,
             followcopies, matcher=matcher)
 
         # Prompt and create actions. Most of this is in the resolve phase
         # already, but we can't handle .hgsubstate in filemerge or
         # subrepo.submerge yet so we have to keep prompting for it.
         if '.hgsubstate' in actionbyfile:
             f = '.hgsubstate'
             m, args, msg = actionbyfile[f]
             if m == 'cd':
                 if repo.ui.promptchoice(
                     _("local changed %s which remote deleted\n"
                       "use (c)hanged version or (d)elete?"
                       "$$ &Changed $$ &Delete") % f, 0):
                     actionbyfile[f] = ('r', None, "prompt delete")
                 elif f in p1:
                     actionbyfile[f] = ('am', None, "prompt keep")
                 else:
                     actionbyfile[f] = ('a', None, "prompt keep")
             elif m == 'dc':
                 f1, f2, fa, move, anc = args
                 flags = p2[f2].flags()
                 if repo.ui.promptchoice(
                     _("remote changed %s which local deleted\n"
                       "use (c)hanged version or leave (d)eleted?"
                       "$$ &Changed $$ &Deleted") % f, 0) == 0:
                     actionbyfile[f] = ('g', (flags, False), "prompt recreating")
                 else:
                     del actionbyfile[f]
 
         # Convert to dictionary-of-lists format
         actions = dict((m, []) for m in 'a am f g cd dc r dm dg m e k'.split())
         for f, (m, args, msg) in actionbyfile.iteritems():
             if m not in actions:
                 actions[m] = []
             actions[m].append((f, args, msg))
 
         if not util.checkcase(repo.path):
             # check collision between files only in p2 for clean update
             if (not branchmerge and
                 (force or not wc.dirty(missing=True, branch=False))):
                 _checkcollision(repo, p2.manifest(), None)
             else:
                 _checkcollision(repo, wc.manifest(), actions)
 
         # divergent renames
         for f, fl in sorted(diverge.iteritems()):
             repo.ui.warn(_("note: possible conflict - %s was renamed "
                            "multiple times to:\n") % f)
             for nf in fl:
                 repo.ui.warn(" %s\n" % nf)
 
         # rename and delete
         for f, fl in sorted(renamedelete.iteritems()):
             repo.ui.warn(_("note: possible conflict - %s was deleted "
                            "and renamed to:\n") % f)
             for nf in fl:
                 repo.ui.warn(" %s\n" % nf)
 
         ### apply phase
         if not branchmerge: # just jump to the new rev
             fp1, fp2, xp1, xp2 = fp2, nullid, xp2, ''
         if not partial:
             repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
             # note that we're in the middle of an update
             repo.vfs.write('updatestate', p2.hex())
 
         stats = applyupdates(repo, actions, wc, p2, overwrite, labels=labels)
 
         if not partial:
             repo.dirstate.beginparentchange()
             repo.setparents(fp1, fp2)
             recordupdates(repo, actions, branchmerge)
             # update completed, clear state
             util.unlink(repo.join('updatestate'))
 
             if not branchmerge:
                 repo.dirstate.setbranch(p2.branch())
             repo.dirstate.endparentchange()
 
     if not partial:
         repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3])
     return stats
 
 def graft(repo, ctx, pctx, labels, keepparent=False):
     """Do a graft-like merge.
 
     This is a merge where the merge ancestor is chosen such that one
     or more changesets are grafted onto the current changeset. In
     addition to the merge, this fixes up the dirstate to include only
     a single parent (if keepparent is False) and tries to duplicate any
     renames/copies appropriately.
 
     ctx - changeset to rebase
     pctx - merge base, usually ctx.p1()
     labels - merge labels eg ['local', 'graft']
     keepparent - keep second parent if any
 
     """
     # If we're grafting a descendant onto an ancestor, be sure to pass
     # mergeancestor=True to update. This does two things: 1) allows the merge if
     # the destination is the same as the parent of the ctx (so we can use graft
     # to copy commits), and 2) informs update that the incoming changes are
     # newer than the destination so it doesn't prompt about "remote changed foo
     # which local deleted".
     mergeancestor = repo.changelog.isancestor(repo['.'].node(), ctx.node())
 
     stats = update(repo, ctx.node(), True, True, pctx.node(),
                    mergeancestor=mergeancestor, labels=labels)
 
     pother = nullid
     parents = ctx.parents()
     if keepparent and len(parents) == 2 and pctx in parents:
         parents.remove(pctx)
         pother = parents[0].node()
 
     repo.dirstate.beginparentchange()
     repo.setparents(repo['.'].node(), pother)
     repo.dirstate.write(repo.currenttransaction())
     # fix up dirstate for copies and renames
     copies.duplicatecopies(repo, ctx.rev(), pctx.rev())
     repo.dirstate.endparentchange()
     return stats

tests/test-backout.t

@@ -1,762 +1,763 b''
   $ hg init basic
   $ cd basic
 
 should complain
 
   $ hg backout
   abort: please specify a revision to backout
   [255]
   $ hg backout -r 0 0
   abort: please specify just one revision
   [255]
 
 basic operation
 (this also tests that editor is invoked if the commit message is not
 specified explicitly)
 
   $ echo a > a
   $ hg commit -d '0 0' -A -m a
   adding a
   $ echo b >> a
   $ hg commit -d '1 0' -m b
 
   $ hg status --rev tip --rev "tip^1"
   M a
   $ HGEDITOR=cat hg backout -d '2 0' tip --tool=true
   reverting a
   Backed out changeset a820f4f40a57
   
   
   HG: Enter commit message.  Lines beginning with 'HG:' are removed.
   HG: Leave message empty to abort commit.
   HG: --
   HG: user: test
   HG: branch 'default'
   HG: changed a
   changeset 2:2929462c3dff backs out changeset 1:a820f4f40a57
   $ cat a
   a
   $ hg summary
   parent: 2:2929462c3dff tip
    Backed out changeset a820f4f40a57
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
 
 commit option
 
   $ cd ..
   $ hg init commit
   $ cd commit
 
   $ echo tomatoes > a
   $ hg add a
   $ hg commit -d '0 0' -m tomatoes
 
   $ echo chair > b
   $ hg add b
   $ hg commit -d '1 0' -m chair
 
   $ echo grapes >> a
   $ hg commit -d '2 0' -m grapes
 
   $ hg backout -d '4 0' 1 --tool=:fail
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   changeset 3:1c2161e97c0a backs out changeset 1:22cb4f70d813
   $ hg summary
   parent: 3:1c2161e97c0a tip
    Backed out changeset 22cb4f70d813
   branch: default
   commit: (clean)
   update: (current)
   phases: 4 draft
 
   $ echo ypples > a
   $ hg commit -d '5 0' -m ypples
 
   $ hg backout -d '6 0' 2 --tool=:fail
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ hg summary
   parent: 4:ed99997b793d tip
    ypples
   branch: default
   commit: 1 unresolved (clean)
   update: (current)
   phases: 5 draft
 
 file that was removed is recreated
 (this also tests that editor is not invoked if the commit message is
 specified explicitly)
 
   $ cd ..
   $ hg init remove
   $ cd remove
 
   $ echo content > a
   $ hg commit -d '0 0' -A -m a
   adding a
 
   $ hg rm a
   $ hg commit -d '1 0' -m b
 
   $ HGEDITOR=cat hg backout -d '2 0' tip --tool=true -m "Backed out changeset 76862dcce372"
   adding a
   changeset 2:de31bdc76c0d backs out changeset 1:76862dcce372
   $ cat a
   content
   $ hg summary
   parent: 2:de31bdc76c0d tip
    Backed out changeset 76862dcce372
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
 
 backout of backout is as if nothing happened
 
   $ hg backout -d '3 0' --merge tip --tool=true
   removing a
   changeset 3:7f6d0f120113 backs out changeset 2:de31bdc76c0d
   $ test -f a
   [1]
   $ hg summary
   parent: 3:7f6d0f120113 tip
    Backed out changeset de31bdc76c0d
   branch: default
   commit: (clean)
   update: (current)
   phases: 4 draft
 
 Test that 'hg rollback' restores dirstate just before opening
 transaction: in-memory dirstate changes should be written into
 '.hg/journal.dirstate' as expected.
 
   $ echo 'removed soon' > b
   $ hg commit -A -d '4 0' -m 'prepare for subsequent removing'
   adding b
   $ echo 'newly added' > c
   $ hg add c
   $ hg remove b
   $ hg commit -d '5 0' -m 'prepare for subsequent backout'
   $ touch -t 200001010000 c
   $ hg status -A
   C c
   $ hg debugstate --nodates
   n 644         12 set                 c
   $ hg backout -d '6 0' -m 'to be rollback-ed soon' -r .
   adding b
   removing c
   changeset 6:4bfec048029d backs out changeset 5:fac0b729a654
   $ hg rollback -q
   $ hg status -A
   A b
   R c
   $ hg debugstate --nodates
   a   0         -1 unset               b
   r   0          0 set                 c
 
 across branch
 
   $ cd ..
   $ hg init branch
   $ cd branch
   $ echo a > a
   $ hg ci -Am0
   adding a
   $ echo b > b
   $ hg ci -Am1
   adding b
   $ hg co -C 0
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg summary
   parent: 0:f7b1eb17ad24 
    0
   branch: default
   commit: (clean)
   update: 1 new changesets (update)
   phases: 2 draft
 
 should fail
 
   $ hg backout 1
   abort: cannot backout change that is not an ancestor
   [255]
   $ echo c > c
   $ hg ci -Am2
   adding c
   created new head
   $ hg summary
   parent: 2:db815d6d32e6 tip
    2
   branch: default
   commit: (clean)
   update: 1 new changesets, 2 branch heads (merge)
   phases: 3 draft
 
 should fail
 
   $ hg backout 1
   abort: cannot backout change that is not an ancestor
   [255]
   $ hg summary
   parent: 2:db815d6d32e6 tip
    2
   branch: default
   commit: (clean)
   update: 1 new changesets, 2 branch heads (merge)
   phases: 3 draft
 
 backout with merge
 
   $ cd ..
   $ hg init merge
   $ cd merge
 
   $ echo line 1 > a
   $ echo line 2 >> a
   $ hg commit -d '0 0' -A -m a
   adding a
   $ hg summary
   parent: 0:59395513a13a tip
    a
   branch: default
   commit: (clean)
   update: (current)
   phases: 1 draft
 
 remove line 1
 
   $ echo line 2 > a
   $ hg commit -d '1 0' -m b
 
   $ echo line 3 >> a
   $ hg commit -d '2 0' -m c
 
   $ hg backout --merge -d '3 0' 1 --tool=true
   reverting a
   created new head
   changeset 3:26b8ccb9ad91 backs out changeset 1:5a50a024c182
   merging with changeset 3:26b8ccb9ad91
   merging a
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg commit -d '4 0' -m d
   $ hg summary
   parent: 4:c7df5e0b9c09 tip
    d
   branch: default
   commit: (clean)
   update: (current)
   phases: 5 draft
 
 check line 1 is back
 
   $ cat a
   line 1
   line 2
   line 3
 
 Test visibility of in-memory dirstate changes outside transaction to
 external hook process
 
   $ cat > $TESTTMP/checkvisibility.sh <<EOF
   > echo "==== \$1:"
   > hg parents --template "{rev}:{node|short}\n"
   > echo "===="
   > EOF
 
 "hg backout --merge REV1" at REV2 below implies steps below:
 
 (1) update to REV1 (REV2 => REV1)
 (2) revert by REV1^1
 (3) commit backnig out revision (REV3)
 (4) update to REV2 (REV3 => REV2)
 (5) merge with REV3 (REV2 => REV2, REV3)
 
 == test visibility to external preupdate hook
 
   $ hg update -q -C 2
   $ hg --config extensions.strip= strip 3
   saved backup bundle to * (glob)
 
   $ cat >> .hg/hgrc <<EOF
   > [hooks]
   > preupdate.visibility = sh $TESTTMP/checkvisibility.sh preupdate
   > EOF
 
 ("-m" is needed to avoid writing dirstte changes out at other than
 invocation of the hook to be examined)
 
   $ hg backout --merge -d '3 0' 1 --tool=true -m 'fixed comment'
   ==== preupdate:
   2:6ea3f2a197a2
   ====
   reverting a
   created new head
   changeset 3:d92a3f57f067 backs out changeset 1:5a50a024c182
   ==== preupdate:
   3:d92a3f57f067
   ====
   merging with changeset 3:d92a3f57f067
   ==== preupdate:
   2:6ea3f2a197a2
   ====
   merging a
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat >> .hg/hgrc <<EOF
   > [hooks]
   > preupdate.visibility =
   > EOF
 
 == test visibility to external update hook
 
   $ hg update -q -C 2
   $ hg --config extensions.strip= strip 3
   saved backup bundle to * (glob)
 
   $ cat >> .hg/hgrc <<EOF
   > [hooks]
   > update.visibility = sh $TESTTMP/checkvisibility.sh update
   > EOF
 
   $ hg backout --merge -d '3 0' 1 --tool=true -m 'fixed comment'
   ==== update:
   1:5a50a024c182
   ====
   reverting a
   created new head
   changeset 3:d92a3f57f067 backs out changeset 1:5a50a024c182
   ==== update:
   2:6ea3f2a197a2
   ====
   merging with changeset 3:d92a3f57f067
   merging a
   ==== update:
   2:6ea3f2a197a2
   3:d92a3f57f067
   ====
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat >> .hg/hgrc <<EOF
   > [hooks]
   > update.visibility =
   > EOF
 
   $ cd ..
 
 backout should not back out subsequent changesets
 
   $ hg init onecs
   $ cd onecs
   $ echo 1 > a
   $ hg commit -d '0 0' -A -m a
   adding a
   $ echo 2 >> a
   $ hg commit -d '1 0' -m b
   $ echo 1 > b
   $ hg commit -d '2 0' -A -m c
   adding b
   $ hg summary
   parent: 2:882396649954 tip
    c
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
 
 without --merge
   $ hg backout --no-commit -d '3 0' 1 --tool=true
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   changeset 22bca4c721e5 backed out, don't forget to commit.
   $ hg locate b
   b
   $ hg update -C tip
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg locate b
   b
   $ hg summary
   parent: 2:882396649954 tip
    c
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
 
 with --merge
   $ hg backout --merge -d '3 0' 1 --tool=true
   reverting a
   created new head
   changeset 3:3202beb76721 backs out changeset 1:22bca4c721e5
   merging with changeset 3:3202beb76721
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg locate b
   b
   $ hg update -C tip
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg locate b
   [1]
 
   $ cd ..
   $ hg init m
   $ cd m
   $ echo a > a
   $ hg commit -d '0 0' -A -m a
   adding a
   $ echo b > b
   $ hg commit -d '1 0' -A -m b
   adding b
   $ echo c > c
   $ hg commit -d '2 0' -A -m b
   adding c
   $ hg update 1
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo d > d
   $ hg commit -d '3 0' -A -m c
   adding d
   created new head
   $ hg merge 2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg commit -d '4 0' -A -m d
   $ hg summary
   parent: 4:b2f3bb92043e tip
    d
   branch: default
   commit: (clean)
   update: (current)
   phases: 5 draft
 
 backout of merge should fail
 
   $ hg backout 4
   abort: cannot backout a merge changeset
   [255]
 
 backout of merge with bad parent should fail
 
   $ hg backout --parent 0 4
   abort: cb9a9f314b8b is not a parent of b2f3bb92043e
   [255]
 
 backout of non-merge with parent should fail
 
   $ hg backout --parent 0 3
   abort: cannot use --parent on non-merge changeset
   [255]
 
 backout with valid parent should be ok
 
   $ hg backout -d '5 0' --parent 2 4 --tool=true
   removing d
   changeset 5:10e5328c8435 backs out changeset 4:b2f3bb92043e
   $ hg summary
   parent: 5:10e5328c8435 tip
    Backed out changeset b2f3bb92043e
   branch: default
   commit: (clean)
   update: (current)
   phases: 6 draft
 
   $ hg rollback
   repository tip rolled back to revision 4 (undo commit)
   working directory now based on revision 4
   $ hg update -C
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg summary
   parent: 4:b2f3bb92043e tip
    d
   branch: default
   commit: (clean)
   update: (current)
   phases: 5 draft
 
   $ hg backout -d '6 0' --parent 3 4 --tool=true
   removing c
   changeset 5:033590168430 backs out changeset 4:b2f3bb92043e
   $ hg summary
   parent: 5:033590168430 tip
    Backed out changeset b2f3bb92043e
   branch: default
   commit: (clean)
   update: (current)
   phases: 6 draft
 
   $ cd ..
 
 named branches
 
   $ hg init named_branches
   $ cd named_branches
 
   $ echo default > default
   $ hg ci -d '0 0' -Am default
   adding default
   $ hg branch branch1
   marked working directory as branch branch1
   (branches are permanent and global, did you want a bookmark?)
   $ echo branch1 > file1
   $ hg ci -d '1 0' -Am file1
   adding file1
   $ hg branch branch2
   marked working directory as branch branch2
   $ echo branch2 > file2
   $ hg ci -d '2 0' -Am file2
   adding file2
 
 without --merge
   $ hg backout --no-commit -r 1 --tool=true
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   changeset bf1602f437f3 backed out, don't forget to commit.
   $ hg branch
   branch2
   $ hg status -A
   R file1
   C default
   C file2
   $ hg summary
   parent: 2:45bbcd363bf0 tip
    file2
   branch: branch2
   commit: 1 removed
   update: (current)
   phases: 3 draft
 
 with --merge
 (this also tests that editor is invoked if '--edit' is specified
 explicitly regardless of '--message')
 
   $ hg update -qC
   $ HGEDITOR=cat hg backout --merge -d '3 0' -r 1 -m 'backout on branch1' --tool=true --edit
   removing file1
   backout on branch1
   
   
   HG: Enter commit message.  Lines beginning with 'HG:' are removed.
   HG: Leave message empty to abort commit.
   HG: --
   HG: user: test
   HG: branch 'branch2'
   HG: removed file1
   created new head
   changeset 3:d4e8f6db59fb backs out changeset 1:bf1602f437f3
   merging with changeset 3:d4e8f6db59fb
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg summary
   parent: 2:45bbcd363bf0 
    file2
   parent: 3:d4e8f6db59fb tip
    backout on branch1
   branch: branch2
   commit: 1 removed (merge)
   update: (current)
   phases: 4 draft
   $ hg update -q -C 2
 
 on branch2 with branch1 not merged, so file1 should still exist:
 
   $ hg id
   45bbcd363bf0 (branch2)
   $ hg st -A
   C default
   C file1
   C file2
   $ hg summary
   parent: 2:45bbcd363bf0 
    file2
   branch: branch2
   commit: (clean)
   update: 1 new changesets, 2 branch heads (merge)
   phases: 4 draft
 
 on branch2 with branch1 merged, so file1 should be gone:
 
   $ hg merge
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg ci -d '4 0' -m 'merge backout of branch1'
   $ hg id
   22149cdde76d (branch2) tip
   $ hg st -A
   C default
   C file2
   $ hg summary
   parent: 4:22149cdde76d tip
    merge backout of branch1
   branch: branch2
   commit: (clean)
   update: (current)
   phases: 5 draft
 
 on branch1, so no file1 and file2:
 
   $ hg co -C branch1
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg id
   bf1602f437f3 (branch1)
   $ hg st -A
   C default
   C file1
   $ hg summary
   parent: 1:bf1602f437f3 
    file1
   branch: branch1
   commit: (clean)
   update: (current)
   phases: 5 draft
 
   $ cd ..
 
 backout of empty changeset (issue4190)
 
   $ hg init emptycommit
   $ cd emptycommit
 
   $ touch file1
   $ hg ci -Aqm file1
   $ hg branch -q branch1
   $ hg ci -qm branch1
   $ hg backout -v 1
   resolving manifests
   nothing changed
   [1]
 
   $ cd ..
 
 
 Test usage of `hg resolve` in case of conflict
 (issue4163)
 
   $ hg init issue4163
   $ cd issue4163
   $ touch foo
   $ hg add foo
   $ cat > foo << EOF
   > one
   > two
   > three
   > four
   > five
   > six
   > seven
   > height
   > nine
   > ten
   > EOF
   $ hg ci -m 'initial'
   $ cat > foo << EOF
   > one
   > two
   > THREE
   > four
   > five
   > six
   > seven
   > height
   > nine
   > ten
   > EOF
   $ hg ci -m 'capital three'
   $ cat > foo << EOF
   > one
   > two
   > THREE
   > four
   > five
   > six
   > seven
   > height
   > nine
   > TEN
   > EOF
   $ hg ci -m 'capital ten'
   $ hg backout -r 'desc("capital three")' --tool internal:fail
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ hg status
   $ hg debugmergestate
   * version 2 records
   local: b71750c4b0fdf719734971e3ef90dbeab5919a2d
   other: a30dd8addae3ce71b8667868478542bc417439e6
+  file extras: foo (ancestorlinknode = 91360952243723bd5b1138d5f26bd8c8564cb553)
   file: foo (record type "F", state "u", hash 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33)
     local path: foo (flags "")
     ancestor path: foo (node f89532f44c247a0e993d63e3a734dd781ab04708)
     other path: foo (node f50039b486d6fa1a90ae51778388cad161f425ee)
   $ mv .hg/merge/state2 .hg/merge/state2-moved
   $ hg debugmergestate
   * version 1 records
   local: b71750c4b0fdf719734971e3ef90dbeab5919a2d
   file: foo (record type "F", state "u", hash 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33)
     local path: foo (flags "")
     ancestor path: foo (node f89532f44c247a0e993d63e3a734dd781ab04708)
     other path: foo (node not stored in v1 format)
   $ mv .hg/merge/state2-moved .hg/merge/state2
   $ hg resolve -l  # still unresolved
   U foo
   $ hg summary
   parent: 2:b71750c4b0fd tip
    capital ten
   branch: default
   commit: 1 unresolved (clean)
   update: (current)
   phases: 3 draft
   $ hg resolve --all --debug
   picked tool ':merge' for foo (binary False symlink False changedelete False)
   merging foo
   my foo@b71750c4b0fd+ other foo@a30dd8addae3 ancestor foo@913609522437
    premerge successful
   (no more unresolved files)
   continue: hg commit
   $ hg status
   M foo
   ? foo.orig
   $ hg resolve -l
   R foo
   $ hg summary
   parent: 2:b71750c4b0fd tip
    capital ten
   branch: default
   commit: 1 modified, 1 unknown
   update: (current)
   phases: 3 draft
   $ cat foo
   one
   two
   three
   four
   five
   six
   seven
   height
   nine
   TEN
 
 --no-commit shouldn't commit
 
   $ hg init a
   $ cd a
   $ for i in 1 2 3; do
   >   touch $i
   >   hg ci -Am $i
   > done
   adding 1
   adding 2
   adding 3
   $ hg backout --no-commit .
   removing 3
   changeset cccc23d9d68f backed out, don't forget to commit.
   $ hg revert -aq
 
 --no-commit can't be used with --merge
 
   $ hg backout --merge --no-commit 2
   abort: cannot use --merge with --no-commit
   [255]

tests/test-graft.t

@@ -1,830 +1,830 b''
 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
   $ 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
   
 
 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]
 
 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"
     searching for copies back to rev 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
    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
   grafting 5:97f8bfe72746 "5"
     searching for copies back to rev 1
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 6b9e5368ca4e+, remote: 97f8bfe72746
    e: remote is newer -> g
   getting e
    b: remote unchanged -> k
   committing files:
   e
   committing manifest
   committing changelog
   $ HGEDITOR=cat hg graft 4 3 --log --debug
   scanning for duplicate grafts
   grafting 4:9c233e8e184d "4"
     searching for copies back to rev 1
   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
    b: remote unchanged -> k
    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@68795b066622
+  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@68795b066622
+  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 --log)
   [255]
 
 Summary should mention graft:
 
   $ hg summary |grep graft
   commit: 2 modified, 2 unknown, 1 unresolved (graft in progress)
 
 Commit while interrupted should fail:
 
   $ hg ci -m 'commit interrupted graft'
   abort: graft in progress
   (use 'hg graft --continue' or 'hg update' to abort)
   [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 extdiff --config extensions.extdiff= --patch -r 2 -r 13
   --- */hg-5c095ad7e90f.patch	* +0000 (glob)
   +++ */hg-7a4785234d87.patch	* +0000 (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 extdiff --config extensions.extdiff= --patch -r 2 -r 13 -X .
   --- */hg-5c095ad7e90f.patch	* +0000 (glob)
   +++ */hg-7a4785234d87.patch	* +0000 (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} {parents} {desc}\n' -r tip
   14 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
   >>>>>>> other: 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 (esc)
   `h\x9b (esc)
   $ 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:f64defefacee
   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
   warning: can't find ancestor for 'b' copied from 'a'!
   $ 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:d1cb6591fa4b
   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:d1cb6591fa4b
   skipping revision 2:5c095ad7e90f (already grafted to 22:d1cb6591fa4b)
   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:d1cb6591fa4b 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 29:53177ba928f6 backs out changeset 28:50a516bb8b57
   $ hg graft 28
   skipping ancestor revision 28:50a516bb8b57
   [255]
   $ hg graft 28 --force
   grafting 28:50a516bb8b57 "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 28:50a516bb8b57 "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 28:50a516bb8b57 "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 (glob)
   $ 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:ed6c7e54e319 "28"
   note: graft of 27:ed6c7e54e319 created no changes to commit
 
   $ cd ..
 
 Graft to duplicate a commit
 
   $ hg init graftsibling
   $ cd graftsibling
   $ touch a
   $ hg commit -qAm a
   $ touch b
   $ hg commit -qAm b
   $ hg log -G -T '{rev}\n'
   @  1
   |
   o  0
   
   $ hg up -q 0
   $ hg graft -r 1
   grafting 1:0e067c57feba "b" (tip)
   $ hg log -G -T '{rev}\n'
   @  2
   |
   | o  1
   |/
   o  0
   
 Graft to duplicate a commit twice
 
   $ hg up -q 0
   $ hg graft -r 2
   grafting 2:044ec77f6389 "b" (tip)
   $ hg log -G -T '{rev}\n'
   @  3
   |
   | o  2
   |/
   | o  1
   |/
   o  0
   

tests/test-histedit-non-commute-abort.t

@@ -1,157 +1,159 b''
   $ . "$TESTDIR/histedit-helpers.sh"
 
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > histedit=
   > EOF
 
   $ initrepo ()
   > {
   >     hg init r
   >     cd r
   >     for x in a b c d e f ; do
   >         echo $x > $x
   >         hg add $x
   >         hg ci -m $x
   >     done
   >     echo a >> e
   >     hg ci -m 'does not commute with e'
   >     cd ..
   > }
 
   $ initrepo
   $ cd r
 
 log before edit
   $ hg log --graph
   @  changeset:   6:bfa474341cc9
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     does not commute with e
   |
   o  changeset:   5:652413bf663e
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     f
   |
   o  changeset:   4:e860deea161a
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     e
   |
   o  changeset:   3:055a42cdd887
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     d
   |
   o  changeset:   2:177f92b77385
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     c
   |
   o  changeset:   1:d2ae7f538514
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     b
   |
   o  changeset:   0:cb9a9f314b8b
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a
   
 
 edit the history
   $ hg histedit 177f92b77385 --commands - 2>&1 <<EOF | fixbundle
   > pick 177f92b77385 c
   > pick 055a42cdd887 d
   > pick bfa474341cc9 does not commute with e
   > pick e860deea161a e
   > pick 652413bf663e f
   > EOF
   merging e
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   Fix up the change (pick e860deea161a)
   (hg histedit --continue to resume)
 
 insert unsupported advisory merge record
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -x
   $ hg debugmergestate
   * version 2 records
   local: 8f7551c7e4a2f2efe0bc8c741baf7f227d65d758
   other: e860deea161a2f77de56603b340ebbb4536308ae
   unrecognized entry: x	advisory record
+  file extras: e (ancestorlinknode = 0000000000000000000000000000000000000000)
   file: e (record type "F", state "u", hash 58e6b3a414a1e090dfc6029add0f3555ccba127f)
     local path: e (flags "")
     ancestor path: e (node null)
     other path: e (node 6b67ccefd5ce6de77e7ead4f5292843a0255329f)
   $ hg resolve -l
   U e
 
 insert unsupported mandatory merge record
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -X
   $ hg debugmergestate
   * version 2 records
   local: 8f7551c7e4a2f2efe0bc8c741baf7f227d65d758
   other: e860deea161a2f77de56603b340ebbb4536308ae
+  file extras: e (ancestorlinknode = 0000000000000000000000000000000000000000)
   file: e (record type "F", state "u", hash 58e6b3a414a1e090dfc6029add0f3555ccba127f)
     local path: e (flags "")
     ancestor path: e (node null)
     other path: e (node 6b67ccefd5ce6de77e7ead4f5292843a0255329f)
   unrecognized entry: X	mandatory record
   $ hg resolve -l
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
   [255]
   $ hg resolve -ma
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
   [255]
 
 abort the edit (should clear out merge state)
   $ hg histedit --abort 2>&1 | fixbundle
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg debugmergestate
   no merge state found
 
 log after abort
   $ hg resolve -l
   $ hg log --graph
   @  changeset:   6:bfa474341cc9
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     does not commute with e
   |
   o  changeset:   5:652413bf663e
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     f
   |
   o  changeset:   4:e860deea161a
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     e
   |
   o  changeset:   3:055a42cdd887
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     d
   |
   o  changeset:   2:177f92b77385
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     c
   |
   o  changeset:   1:d2ae7f538514
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     b
   |
   o  changeset:   0:cb9a9f314b8b
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a
   
 
   $ cd ..

tests/test-issue672.t

@@ -1,98 +1,98 b''
 https://bz.mercurial-scm.org/672
 
 # 0-2-4
 #  \ \ \
 #   1-3-5
 #
 # rename in #1, content change in #4.
 
   $ hg init
 
   $ touch 1
   $ touch 2
   $ hg commit -Am init  # 0
   adding 1
   adding 2
 
   $ hg rename 1 1a
   $ hg commit -m rename # 1
 
   $ hg co -C 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ echo unrelated >> 2
   $ hg ci -m unrelated1 # 2
   created new head
 
   $ hg merge --debug 1
     searching for copies back to rev 1
     unmatched files in other:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: '1' -> dst: '1a' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a
    1: other deleted -> r
   removing 1
    1a: remote created -> g
   getting 1a
    2: remote unchanged -> k
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg ci -m merge1 # 3
 
   $ hg co -C 2
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ echo hello >> 1
   $ hg ci -m unrelated2 # 4
   created new head
 
   $ hg co -C 3
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge -y --debug 4
     searching for copies back to rev 1
     unmatched files in local:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: '1' -> dst: '1a' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: c64f439569a9, local: e327dca35ac8+, remote: 746e9549ea96
    preserving 1a for resolve of 1a
    1a: local copied/moved from 1 -> m (premerge)
   picked tool ':merge' for 1a (binary False symlink False changedelete False)
   merging 1a and 1 to 1a
-  my 1a@e327dca35ac8+ other 1@746e9549ea96 ancestor 1@81f4b099af3d
+  my 1a@e327dca35ac8+ other 1@746e9549ea96 ancestor 1@c64f439569a9
    premerge successful
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg co -C 4
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge -y --debug 3
     searching for copies back to rev 1
     unmatched files in other:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: '1' -> dst: '1a' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: c64f439569a9, local: 746e9549ea96+, remote: e327dca35ac8
    preserving 1 for resolve of 1a
   removing 1
    1a: remote moved from 1 -> m (premerge)
   picked tool ':merge' for 1a (binary False symlink False changedelete False)
   merging 1 and 1a to 1a
-  my 1a@746e9549ea96+ other 1a@e327dca35ac8 ancestor 1@81f4b099af3d
+  my 1a@746e9549ea96+ other 1a@e327dca35ac8 ancestor 1@c64f439569a9
    premerge successful
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 

tests/test-merge-changedelete.t

@@ -1,992 +1,1034 b''
 Tests for change/delete conflicts, including:
 b5605d88dc27: Make ui.prompt repeat on "unrecognized response" again
  (issue897)
 
 840e2b315c1f: Fix misleading error and prompts during update/merge
  (issue556)
 
 Make sure HGMERGE doesn't interfere with the test
   $ unset HGMERGE
 
   $ status() {
   >     echo "--- status ---"
   >     hg st -A file1 file2 file3
   >     echo "--- resolve --list ---"
   >     hg resolve --list file1 file2 file3
   >     echo "--- debugmergestate ---"
   >     hg debugmergestate
   >     for file in file1 file2 file3; do
   >         if [ -f $file ]; then
   >             echo "--- $file ---"
   >             cat $file
   >         else
   >             echo "*** $file does not exist"
   >         fi
   >     done
   > }
 
   $ hg init repo
   $ cd repo
 
   $ echo 1 > file1
   $ echo 2 > file2
   $ echo 3 > file3
   $ hg ci -Am 'added files'
   adding file1
   adding file2
   adding file3
 
   $ hg rm file1
   $ echo changed >> file2
   $ echo changed1 >> file3
   $ hg ci -m 'removed file1, changed file2, changed file3'
 
   $ hg co 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ echo changed >> file1
   $ hg rm file2
   $ echo changed2 >> file3
   $ hg ci -m 'changed file1, removed file2, changed file3'
   created new head
 
 
 Non-interactive merge:
 
   $ hg merge -y
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? u
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
   merging file3
   warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 3 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
   $ status
   --- status ---
   M file2
   M file3
   C file1
   --- resolve --list ---
   U file1
   U file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   <<<<<<< local: 13910f48cf7b - test: changed file1, removed file2, changed file3
   changed2
   =======
   changed1
   >>>>>>> other: 10f9a0a634e8  - test: removed file1, changed file2, changed file3
 
 
 Interactive merge:
 
   $ hg co -C
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --config ui.interactive=true <<EOF
   > c
   > d
   > EOF
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? c
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? d
   merging file3
   warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
   0 files updated, 2 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
   $ status
   --- status ---
   file2: * (glob)
   M file3
   C file1
   --- resolve --list ---
   R file1
   R file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "r", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   *** file2 does not exist
   --- file3 ---
   3
   <<<<<<< local: 13910f48cf7b - test: changed file1, removed file2, changed file3
   changed2
   =======
   changed1
   >>>>>>> other: 10f9a0a634e8  - test: removed file1, changed file2, changed file3
 
 
 Interactive merge with bad input:
 
   $ hg co -C
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg merge --config ui.interactive=true <<EOF
   > foo
   > bar
   > d
   > baz
   > c
   > EOF
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? foo
   unrecognized response
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? bar
   unrecognized response
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? d
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? baz
   unrecognized response
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? c
   merging file3
   warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
   0 files updated, 1 files merged, 1 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
   $ status
   --- status ---
   M file2
   M file3
   R file1
   --- resolve --list ---
   R file1
   R file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "r", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   *** file1 does not exist
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   <<<<<<< local: 13910f48cf7b - test: changed file1, removed file2, changed file3
   changed2
   =======
   changed1
   >>>>>>> other: 10f9a0a634e8  - test: removed file1, changed file2, changed file3
 
 
 Interactive merge with not enough input:
 
   $ hg co -C
   2 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --config ui.interactive=true <<EOF
   > d
   > EOF
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? d
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   merging file3
   warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 1 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
   $ status
   --- status ---
   M file2
   M file3
   R file1
   --- resolve --list ---
   R file1
   U file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   *** file1 does not exist
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   <<<<<<< local: 13910f48cf7b - test: changed file1, removed file2, changed file3
   changed2
   =======
   changed1
   >>>>>>> other: 10f9a0a634e8  - test: removed file1, changed file2, changed file3
 
 Choose local versions of files
 
   $ hg co -C
   2 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --tool :local
   0 files updated, 3 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ status 2>&1 | tee $TESTTMP/local.status
   --- status ---
   file2: * (glob)
   M file3
   C file1
   --- resolve --list ---
   R file1
   R file2
   R file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "r", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "r", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   *** file2 does not exist
   --- file3 ---
   3
   changed2
 
 Choose other versions of files
 
   $ hg co -C
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg merge --tool :other
   0 files updated, 2 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ status 2>&1 | tee $TESTTMP/other.status
   --- status ---
   M file2
   M file3
   R file1
   --- resolve --list ---
   R file1
   R file2
   R file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "r", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "r", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   *** file1 does not exist
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed1
 
 Fail
 
   $ hg co -C
   2 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --tool :fail
   0 files updated, 0 files merged, 0 files removed, 3 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ status 2>&1 | tee $TESTTMP/fail.status
   --- status ---
   M file2
   M file3
   C file1
   --- resolve --list ---
   U file1
   U file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed2
 
 Force prompts with no input (should be similar to :fail)
 
   $ hg co -C
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --config ui.interactive=True --tool :prompt
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   no tool found to merge file3
   keep (l)ocal, take (o)ther, or leave (u)nresolved? 
   0 files updated, 0 files merged, 0 files removed, 3 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ status 2>&1 | tee $TESTTMP/prompt.status
   --- status ---
   M file2
   M file3
   C file1
   --- resolve --list ---
   U file1
   U file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed2
   $ cmp $TESTTMP/fail.status $TESTTMP/prompt.status || diff -U8 $TESTTMP/fail.status $TESTTMP/prompt.status
 
 
 Force prompts
 
   $ hg co -C
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --tool :prompt
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? u
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
   no tool found to merge file3
   keep (l)ocal, take (o)ther, or leave (u)nresolved? u
   0 files updated, 0 files merged, 0 files removed, 3 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ status
   --- status ---
   M file2
   M file3
   C file1
   --- resolve --list ---
   U file1
   U file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed2
 
 Choose to merge all files
 
   $ hg co -C
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg merge --tool :merge3
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? u
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
   merging file3
   warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 3 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ status
   --- status ---
   M file2
   M file3
   C file1
   --- resolve --list ---
   U file1
   U file2
   U file3
   --- debugmergestate ---
   * version 2 records
   local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
+  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
     local path: file3 (flags "")
     ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
     other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   <<<<<<< local: 13910f48cf7b - test: changed file1, removed file2, changed file3
   changed2
   ||||||| base
   =======
   changed1
   >>>>>>> other: 10f9a0a634e8  - test: removed file1, changed file2, changed file3
 
 Exercise transitions between local, other, fail and prompt, and make sure the
 dirstate stays consistent. (Compare with each other and to the above
 invocations.)
 
   $ testtransitions() {
   >     # this traversal order covers every transition
   >     tools="local other prompt local fail other local prompt other fail prompt fail local"
   >     lasttool="merge3"
   >     for tool in $tools; do
   >         echo "=== :$lasttool -> :$tool ==="
   >         ref="$TESTTMP/$tool.status"
   >         hg resolve --unmark --all
   >         hg resolve --tool ":$tool" --all --config ui.interactive=True
   >         status > "$TESTTMP/compare.status" 2>&1
   >         echo '--- diff of status ---'
   >         if cmp "$TESTTMP/$tool.status" "$TESTTMP/compare.status" || diff -U8 "$TESTTMP/$tool.status" "$TESTTMP/compare.status"; then
   >             echo '(status identical)'
   >         fi
   >         lasttool="$tool"
   >         echo
   >     done
   > }
 
   $ testtransitions
   === :merge3 -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :local -> :other ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :other -> :prompt ===
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   no tool found to merge file3
   keep (l)ocal, take (o)ther, or leave (u)nresolved? 
   --- diff of status ---
   (status identical)
   
   === :prompt -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :local -> :fail ===
   --- diff of status ---
   (status identical)
   
   === :fail -> :other ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :other -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :local -> :prompt ===
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   no tool found to merge file3
   keep (l)ocal, take (o)ther, or leave (u)nresolved? 
   --- diff of status ---
   (status identical)
   
   === :prompt -> :other ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :other -> :fail ===
   --- diff of status ---
   (status identical)
   
   === :fail -> :prompt ===
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   no tool found to merge file3
   keep (l)ocal, take (o)ther, or leave (u)nresolved? 
   --- diff of status ---
   (status identical)
   
   === :prompt -> :fail ===
   --- diff of status ---
   (status identical)
   
   === :fail -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
 
 
 Non-interactive linear update
 
   $ hg co -C 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo changed >> file1
   $ hg rm file2
   $ hg update 1 -y
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? u
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
   1 files updated, 0 files merged, 0 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ status
   --- status ---
   A file1
   C file2
   C file3
   --- resolve --list ---
   U file1
   U file2
   --- debugmergestate ---
   * version 2 records
   local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed1
 
 Choose local versions of files
 
   $ hg co -C 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo changed >> file1
   $ hg rm file2
   $ hg update 1 --tool :local
   1 files updated, 2 files merged, 0 files removed, 0 files unresolved
   $ status 2>&1 | tee $TESTTMP/local.status
   --- status ---
   file2: * (glob)
   A file1
   C file3
   --- resolve --list ---
   R file1
   R file2
   --- debugmergestate ---
   * version 2 records
   local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "r", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
   --- file1 ---
   1
   changed
   *** file2 does not exist
   --- file3 ---
   3
   changed1
 
 Choose other versions of files
 
   $ hg co -C 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo changed >> file1
   $ hg rm file2
   $ hg update 1 --tool :other
   1 files updated, 1 files merged, 1 files removed, 0 files unresolved
   $ status 2>&1 | tee $TESTTMP/other.status
   --- status ---
   file1: * (glob)
   C file2
   C file3
   --- resolve --list ---
   R file1
   R file2
   --- debugmergestate ---
   * version 2 records
   local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "r", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
   *** file1 does not exist
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed1
 
 Fail
 
   $ hg co -C 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo changed >> file1
   $ hg rm file2
   $ hg update 1 --tool :fail
   1 files updated, 0 files merged, 0 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ status 2>&1 | tee $TESTTMP/fail.status
   --- status ---
   A file1
   C file2
   C file3
   --- resolve --list ---
   U file1
   U file2
   --- debugmergestate ---
   * version 2 records
   local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed1
 
 Force prompts with no input
 
   $ hg co -C 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo changed >> file1
   $ hg rm file2
   $ hg update 1 --config ui.interactive=True --tool :prompt
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   1 files updated, 0 files merged, 0 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ status 2>&1 | tee $TESTTMP/prompt.status
   --- status ---
   A file1
   C file2
   C file3
   --- resolve --list ---
   U file1
   U file2
   --- debugmergestate ---
   * version 2 records
   local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed1
   $ cmp $TESTTMP/fail.status $TESTTMP/prompt.status || diff -U8 $TESTTMP/fail.status $TESTTMP/prompt.status
 
 Choose to merge all files
 
   $ hg co -C 0
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo changed >> file1
   $ hg rm file2
   $ hg update 1 --tool :merge3
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? u
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
   1 files updated, 0 files merged, 0 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ status
   --- status ---
   A file1
   C file2
   C file3
   --- resolve --list ---
   U file1
   U file2
   --- debugmergestate ---
   * version 2 records
   local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
   other: 10f9a0a634e82080907e62f075ab119cbc565ea6
+  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
     other path: file1 (node null)
+  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
   file: file2 (record type "C", state "u", hash null)
     local path: file2 (flags "")
     ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
     other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
   --- file1 ---
   1
   changed
   --- file2 ---
   2
   changed
   --- file3 ---
   3
   changed1
 
 Test transitions between different merge tools
 
   $ testtransitions
   === :merge3 -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :local -> :other ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :other -> :prompt ===
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   --- diff of status ---
   (status identical)
   
   === :prompt -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :local -> :fail ===
   --- diff of status ---
   (status identical)
   
   === :fail -> :other ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :other -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :local -> :prompt ===
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   --- diff of status ---
   (status identical)
   
   === :prompt -> :other ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   
   === :other -> :fail ===
   --- diff of status ---
   (status identical)
   
   === :fail -> :prompt ===
   local changed file1 which remote deleted
   use (c)hanged version, (d)elete, or leave (u)nresolved? 
   remote changed file2 which local deleted
   use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
   --- diff of status ---
   (status identical)
   
   === :prompt -> :fail ===
   --- diff of status ---
   (status identical)
   
   === :fail -> :local ===
   (no more unresolved files)
   --- diff of status ---
   (status identical)
   

tests/test-merge-criss-cross.t

@@ -1,352 +1,352 b''
 Criss cross merging
 
   $ hg init criss-cross
   $ cd criss-cross
   $ echo '0 base' > f1
   $ echo '0 base' > f2
   $ hg ci -Aqm '0 base'
 
   $ echo '1 first change' > f1
   $ hg ci -m '1 first change f1'
 
   $ hg up -qr0
   $ echo '2 first change' > f2
   $ hg ci -qm '2 first change f2'
 
   $ hg merge -qr 1
   $ hg ci -m '3 merge'
 
   $ hg up -qr2
   $ hg merge -qr1
   $ hg ci -qm '4 merge'
 
   $ echo '5 second change' > f1
   $ hg ci -m '5 second change f1'
 
   $ hg up -r3
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo '6 second change' > f2
   $ hg ci -m '6 second change f2'
 
   $ hg log -G
   @  changeset:   6:3b08d01b0ab5
   |  tag:         tip
   |  parent:      3:cf89f02107e5
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     6 second change f2
   |
   | o  changeset:   5:adfe50279922
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     5 second change f1
   | |
   | o    changeset:   4:7d3e55501ae6
   | |\   parent:      2:40663881a6dd
   | | |  parent:      1:0f6b37dbe527
   | | |  user:        test
   | | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | | |  summary:     4 merge
   | | |
   o---+  changeset:   3:cf89f02107e5
   | | |  parent:      2:40663881a6dd
   |/ /   parent:      1:0f6b37dbe527
   | |    user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | |    summary:     3 merge
   | |
   | o  changeset:   2:40663881a6dd
   | |  parent:      0:40494bf2444c
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     2 first change f2
   | |
   o |  changeset:   1:0f6b37dbe527
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     1 first change f1
   |
   o  changeset:   0:40494bf2444c
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     0 base
   
 
   $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor='!'
   note: using 0f6b37dbe527 as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    preserving f2 for resolve of f2
    f1: remote is newer -> g
   getting f1
    f2: versions differ -> m (premerge)
   picked tool ':dump' for f2 (binary False symlink False changedelete False)
   merging f2
-  my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@40494bf2444c
+  my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@0f6b37dbe527
    f2: versions differ -> m (merge)
   picked tool ':dump' for f2 (binary False symlink False changedelete False)
-  my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@40494bf2444c
+  my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@0f6b37dbe527
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
   $ head *
   ==> f1 <==
   5 second change
   
   ==> f2 <==
   6 second change
   
   ==> f2.base <==
   0 base
   
   ==> f2.local <==
   6 second change
   
   ==> f2.orig <==
   6 second change
   
   ==> f2.other <==
   2 first change
 
   $ hg up -qC .
   $ hg merge -v --tool internal:dump 5 --config merge.preferancestor="null 40663881 3b08d"
   note: using 40663881a6dd as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=0f6b37dbe527
   resolving manifests
   merging f1
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
 Redo merge with merge.preferancestor="*" to enable bid merge
 
   $ rm f*
   $ hg up -qC .
   $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: versions differ -> m
    f2: remote unchanged -> k
   
   auction for merging merge bids
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
    f1: remote is newer -> g
   getting f1
    f2: remote unchanged -> k
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ head *
   ==> f1 <==
   5 second change
   
   ==> f2 <==
   6 second change
 
 
 The other way around:
 
   $ hg up -C -r5
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge -v --debug --config merge.preferancestor="*"
   note: merging adfe50279922+ and 3b08d01b0ab5 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: adfe50279922+, remote: 3b08d01b0ab5
    f1: remote unchanged -> k
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: adfe50279922+, remote: 3b08d01b0ab5
    f1: versions differ -> m
    f2: remote is newer -> g
   
   auction for merging merge bids
    f1: picking 'keep' action
    f2: picking 'get' action
   end of auction
   
    f2: remote is newer -> g
   getting f2
    f1: remote unchanged -> k
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ head *
   ==> f1 <==
   5 second change
   
   ==> f2 <==
   6 second change
 
 Verify how the output looks and and how verbose it is:
 
   $ hg up -qC
   $ hg merge
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg up -qC
   $ hg merge -v
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
   resolving manifests
   
   calculating bids for ancestor 40663881a6dd
   resolving manifests
   
   auction for merging merge bids
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
   getting f1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg up -qC
   $ hg merge -v --debug --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: versions differ -> m
    f2: remote unchanged -> k
   
   auction for merging merge bids
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
    f1: remote is newer -> g
   getting f1
    f2: remote unchanged -> k
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cd ..
 
 http://stackoverflow.com/questions/9350005/how-do-i-specify-a-merge-base-to-use-in-a-hg-merge/9430810
 
   $ hg init ancestor-merging
   $ cd ancestor-merging
   $ echo a > x
   $ hg commit -A -m a x
   $ hg update -q 0
   $ echo b >> x
   $ hg commit -m b
   $ hg update -q 0
   $ echo c >> x
   $ hg commit -qm c
   $ hg update -q 1
   $ hg merge -q --tool internal:local 2
   $ echo c >> x
   $ hg commit -m bc
   $ hg update -q 2
   $ hg merge -q --tool internal:local 1
   $ echo b >> x
   $ hg commit -qm cb
 
   $ hg merge --config merge.preferancestor='!'
   note: using 70008a2163f6 as ancestor of 0d355fdef312 and 4b8b546a3eef
         alternatively, use --config merge.preferancestor=b211bbc6eb3c
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   c
   b
   c
 
   $ hg up -qC .
 
   $ hg merge --config merge.preferancestor=b211bbc6eb3c
   note: using b211bbc6eb3c as ancestor of 0d355fdef312 and 4b8b546a3eef
         alternatively, use --config merge.preferancestor=70008a2163f6
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   b
   c
   b
 
   $ hg up -qC .
 
   $ hg merge -v --config merge.preferancestor="*"
   note: merging 0d355fdef312+ and 4b8b546a3eef using bids from ancestors 70008a2163f6 and b211bbc6eb3c
   
   calculating bids for ancestor 70008a2163f6
   resolving manifests
   
   calculating bids for ancestor b211bbc6eb3c
   resolving manifests
   
   auction for merging merge bids
    x: multiple bids for merge action:
     versions differ -> m
     versions differ -> m
    x: ambiguous merge - picked m action
   end of auction
   
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   c
   b
   c
 
 Verify that the old context ancestor works with / despite preferancestor:
 
   $ hg log -r 'ancestor(head())' --config merge.preferancestor=1 -T '{rev}\n'
   1
   $ hg log -r 'ancestor(head())' --config merge.preferancestor=2 -T '{rev}\n'
   2
   $ hg log -r 'ancestor(head())' --config merge.preferancestor=3 -T '{rev}\n'
   1
   $ hg log -r 'ancestor(head())' --config merge.preferancestor='1337 * - 2' -T '{rev}\n'
   2
 
   $ cd ..

tests/test-rebase-abort.t

@@ -1,394 +1,396 b''
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > rebase=
   > 
   > [phases]
   > publish=False
   > 
   > [alias]
   > tglog = log -G --template "{rev}:{phase} '{desc}' {branches}\n"
   > EOF
 
 
   $ hg init a
   $ cd a
 
   $ touch .hg/rebasestate
   $ hg sum
   parent: -1:000000000000 tip (empty repository)
   branch: default
   commit: (clean)
   update: (current)
   abort: .hg/rebasestate is incomplete
   [255]
   $ rm .hg/rebasestate
 
   $ echo c1 > common
   $ hg add common
   $ hg ci -m C1
 
   $ echo c2 >> common
   $ hg ci -m C2
 
   $ echo c3 >> common
   $ hg ci -m C3
 
   $ hg up -q -C 1
 
   $ echo l1 >> extra
   $ hg add extra
   $ hg ci -m L1
   created new head
 
   $ sed -e 's/c2/l2/' common > common.new
   $ mv common.new common
   $ hg ci -m L2
 
   $ hg phase --force --secret 2
 
   $ hg tglog
   @  4:draft 'L2'
   |
   o  3:draft 'L1'
   |
   | o  2:secret 'C3'
   |/
   o  1:draft 'C2'
   |
   o  0:draft 'C1'
   
 
 Conflicting rebase:
 
   $ hg rebase -s 3 -d 2
   rebasing 3:3163e20567cc "L1"
   rebasing 4:46f0b057b5c0 "L2" (tip)
   merging common
   warning: conflicts while merging common! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
 Insert unsupported advisory merge record:
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -x
   $ hg debugmergestate
   * version 2 records
   local: 3e046f2ecedb793b97ed32108086edd1a162f8bc
   other: 46f0b057b5c061d276b91491c22151f78698abd2
   unrecognized entry: x	advisory record
+  file extras: common (ancestorlinknode = 3163e20567cc93074fbb7a53c8b93312e59dbf2c)
   file: common (record type "F", state "u", hash 94c8c21d08740f5da9eaa38d1f175c592692f0d1)
     local path: common (flags "")
     ancestor path: common (node de0a666fdd9c1a0b0698b90d85064d8bd34f74b6)
     other path: common (node 2f6411de53677f6f1048fef5bf888d67a342e0a5)
   $ hg resolve -l
   U common
 
 Insert unsupported mandatory merge record:
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -X
   $ hg debugmergestate
   * version 2 records
   local: 3e046f2ecedb793b97ed32108086edd1a162f8bc
   other: 46f0b057b5c061d276b91491c22151f78698abd2
+  file extras: common (ancestorlinknode = 3163e20567cc93074fbb7a53c8b93312e59dbf2c)
   file: common (record type "F", state "u", hash 94c8c21d08740f5da9eaa38d1f175c592692f0d1)
     local path: common (flags "")
     ancestor path: common (node de0a666fdd9c1a0b0698b90d85064d8bd34f74b6)
     other path: common (node 2f6411de53677f6f1048fef5bf888d67a342e0a5)
   unrecognized entry: X	mandatory record
   $ hg resolve -l
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
   [255]
   $ hg resolve -ma
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
   [255]
 
 Abort (should clear out unsupported merge state):
 
   $ hg rebase --abort
   saved backup bundle to $TESTTMP/a/.hg/strip-backup/3e046f2ecedb-6beef7d5-backup.hg (glob)
   rebase aborted
   $ hg debugmergestate
   no merge state found
 
   $ hg tglog
   @  4:draft 'L2'
   |
   o  3:draft 'L1'
   |
   | o  2:secret 'C3'
   |/
   o  1:draft 'C2'
   |
   o  0:draft 'C1'
   
 Test safety for inconsistent rebase state, which may be created (and
 forgotten) by Mercurial earlier than 2.7. This emulates Mercurial
 earlier than 2.7 by renaming ".hg/rebasestate" temporarily.
 
   $ hg rebase -s 3 -d 2
   rebasing 3:3163e20567cc "L1"
   rebasing 4:46f0b057b5c0 "L2" (tip)
   merging common
   warning: conflicts while merging common! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
   $ mv .hg/rebasestate .hg/rebasestate.back
   $ hg update --quiet --clean 2
   $ hg --config extensions.mq= strip --quiet "destination()"
   $ mv .hg/rebasestate.back .hg/rebasestate
 
   $ hg rebase --continue
   abort: cannot continue inconsistent rebase
   (use "hg rebase --abort" to clear broken state)
   [255]
   $ hg summary | grep '^rebase: '
   rebase: (use "hg rebase --abort" to clear broken state)
   $ hg rebase --abort
   rebase aborted (no revision is removed, only broken state is cleared)
 
   $ cd ..
 
 
 Construct new repo:
 
   $ hg init b
   $ cd b
 
   $ echo a > a
   $ hg ci -Am A
   adding a
 
   $ echo b > b
   $ hg ci -Am B
   adding b
 
   $ echo c > c
   $ hg ci -Am C
   adding c
 
   $ hg up -q 0
 
   $ echo b > b
   $ hg ci -Am 'B bis'
   adding b
   created new head
 
   $ echo c1 > c
   $ hg ci -Am C1
   adding c
 
   $ hg phase --force --secret 1
   $ hg phase --public 1
 
 Rebase and abort without generating new changesets:
 
   $ hg tglog
   @  4:draft 'C1'
   |
   o  3:draft 'B bis'
   |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ hg rebase -b 4 -d 2
   rebasing 3:a6484957d6b9 "B bis"
   note: rebase of 3:a6484957d6b9 created no changes to commit
   rebasing 4:145842775fec "C1" (tip)
   merging c
   warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
   $ hg tglog
   @  4:draft 'C1'
   |
   o  3:draft 'B bis'
   |
   | @  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
   $ hg rebase -a
   rebase aborted
 
   $ hg tglog
   @  4:draft 'C1'
   |
   o  3:draft 'B bis'
   |
   | o  2:secret 'C'
   | |
   | o  1:public 'B'
   |/
   o  0:public 'A'
   
 
   $ cd ..
 
 rebase abort should not leave working copy in a merge state if tip-1 is public
 (issue4082)
 
   $ hg init abortpublic
   $ cd abortpublic
   $ echo a > a && hg ci -Aqm a
   $ hg book master
   $ hg book foo
   $ echo b > b && hg ci -Aqm b
   $ hg up -q master
   $ echo c > c && hg ci -Aqm c
   $ hg phase -p -r .
   $ hg up -q foo
   $ echo C > c && hg ci -Aqm C
   $ hg log -G --template "{rev} {desc} {bookmarks}"
   @  3 C foo
   |
   | o  2 c master
   | |
   o |  1 b
   |/
   o  0 a
   
 
   $ hg rebase -d master -r foo
   rebasing 3:6c0f977a22d8 "C" (tip foo)
   merging c
   warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
   $ hg rebase --abort
   rebase aborted
   $ hg log -G --template "{rev} {desc} {bookmarks}"
   @  3 C foo
   |
   | o  2 c master
   | |
   o |  1 b
   |/
   o  0 a
   
   $ cd ..
 
 Make sure we don't clobber changes in the working directory when the
 user has somehow managed to update to a different revision (issue4009)
 
   $ hg init noupdate
   $ cd noupdate
   $ hg book @
   $ echo original > a
   $ hg add a
   $ hg commit -m a
   $ echo x > b
   $ hg add b
   $ hg commit -m b1
   $ hg up 0
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (leaving bookmark @)
   $ hg book foo
   $ echo y > b
   $ hg add b
   $ hg commit -m b2
   created new head
 
   $ hg rebase -d @ -b foo --tool=internal:fail
   rebasing 2:070cf4580bb5 "b2" (tip foo)
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
   $ mv .hg/rebasestate ./ # so we're allowed to hg up like in mercurial <2.6.3
   $ hg up -C 0            # user does other stuff in the repo
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ mv rebasestate .hg/   # user upgrades to 2.7
 
   $ echo new > a
   $ hg up 1               # user gets an error saying to run hg rebase --abort
   abort: rebase in progress
   (use 'hg rebase --continue' or 'hg rebase --abort')
   [255]
 
   $ cat a
   new
   $ hg rebase --abort
   rebase aborted
   $ cat a
   new
 
   $ cd ..
 
 On the other hand, make sure we *do* clobber changes whenever we
 haven't somehow managed to update the repo to a different revision
 during a rebase (issue4661)
 
   $ hg ini yesupdate
   $ cd yesupdate
   $ echo "initial data" > foo.txt
   $ hg add
   adding foo.txt
   $ hg ci -m "initial checkin"
   $ echo "change 1" > foo.txt
   $ hg ci -m "change 1"
   $ hg up 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo "conflicting change 1" > foo.txt
   $ hg ci -m "conflicting 1"
   created new head
   $ echo "conflicting change 2" > foo.txt
   $ hg ci -m "conflicting 2"
 
   $ hg rebase -d 1 --tool 'internal:fail'
   rebasing 2:e4ea5cdc9789 "conflicting 1"
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
   $ hg rebase --abort
   rebase aborted
   $ hg summary
   parent: 3:b16646383533 tip
    conflicting 2
   branch: default
   commit: (clean)
   update: 1 new changesets, 2 branch heads (merge)
   phases: 4 draft
   $ cd ..
 
 test aborting a rebase succeeds after rebasing with skipped commits onto a
 public changeset (issue4896)
 
   $ hg init succeedonpublic
   $ cd succeedonpublic
   $ echo 'content' > root
   $ hg commit -A -m 'root' -q
 
 set up public branch
   $ echo 'content' > disappear
   $ hg commit -A -m 'disappear public' -q
 commit will cause merge conflict on rebase
   $ echo '' > root
   $ hg commit -m 'remove content public' -q
   $ hg phase --public
 
 setup the draft branch that will be rebased onto public commit
   $ hg up -r 0 -q
   $ echo 'content' > disappear
 commit will disappear
   $ hg commit -A -m 'disappear draft' -q
   $ echo 'addedcontADDEDentadded' > root
 commit will cause merge conflict on rebase
   $ hg commit -m 'add content draft' -q
 
   $ hg rebase -d 'public()' --tool :merge -q
   note: rebase of 3:0682fd3dabf5 created no changes to commit
   warning: conflicts while merging root! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
   $ hg rebase --abort
   rebase aborted
   $ cd ..
 

tests/test-resolve.t

@@ -1,328 +1,332 b''
 test that a commit clears the merge state.
 
   $ hg init repo
   $ cd repo
 
   $ echo foo > file1
   $ echo foo > file2
   $ hg commit -Am 'add files'
   adding file1
   adding file2
 
   $ echo bar >> file1
   $ echo bar >> file2
   $ hg commit -Am 'append bar to files'
 
 create a second head with conflicting edits
 
   $ hg up -C 0
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo baz >> file1
   $ echo baz >> file2
   $ hg commit -Am 'append baz to files'
   created new head
 
 create a third head with no conflicting edits
   $ hg up -qC 0
   $ echo foo > file3
   $ hg commit -Am 'add non-conflicting file'
   adding file3
   created new head
 
 failing merge
 
   $ hg up -qC 2
   $ hg merge --tool=internal:fail 1
   0 files updated, 0 files merged, 0 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
 resolve -l should contain unresolved entries
 
   $ hg resolve -l
   U file1
   U file2
 
   $ hg resolve -l --no-status
   file1
   file2
 
 resolving an unknown path should emit a warning, but not for -l
 
   $ hg resolve -m does-not-exist
   arguments do not match paths that need resolving
   $ hg resolve -l does-not-exist
 
 don't allow marking or unmarking driver-resolved files
 
   $ cat > $TESTTMP/markdriver.py << EOF
   > '''mark and unmark files as driver-resolved'''
   > from mercurial import cmdutil, merge, scmutil
   > cmdtable = {}
   > command = cmdutil.command(cmdtable)
   > @command('markdriver',
   >   [('u', 'unmark', None, '')],
   >   'FILE...')
   > def markdriver(ui, repo, *pats, **opts):
   >     wlock = repo.wlock()
   >     try:
   >         ms = merge.mergestate.read(repo)
   >         m = scmutil.match(repo[None], pats, opts)
   >         for f in ms:
   >             if not m(f):
   >                 continue
   >             if not opts['unmark']:
   >                 ms.mark(f, 'd')
   >             else:
   >                 ms.mark(f, 'u')
   >         ms.commit()
   >     finally:
   >         wlock.release()
   > EOF
   $ hg --config extensions.markdriver=$TESTTMP/markdriver.py markdriver file1
   $ hg resolve --list
   D file1
   U file2
   $ hg resolve --mark file1
   not marking file1 as it is driver-resolved
 this should not print out file1
   $ hg resolve --mark --all
   (no more unresolved files -- run "hg resolve --all" to conclude)
   $ hg resolve --mark 'glob:file*'
   (no more unresolved files -- run "hg resolve --all" to conclude)
   $ hg resolve --list
   D file1
   R file2
   $ hg resolve --unmark file1
   not unmarking file1 as it is driver-resolved
   (no more unresolved files -- run "hg resolve --all" to conclude)
   $ hg resolve --unmark --all
   $ hg resolve --list
   D file1
   U file2
   $ hg --config extensions.markdriver=$TESTTMP/markdriver.py markdriver --unmark file1
   $ hg resolve --list
   U file1
   U file2
 
 resolve the failure
 
   $ echo resolved > file1
   $ hg resolve -m file1
 
 resolve -l should show resolved file as resolved
 
   $ hg resolve -l
   R file1
   U file2
 
   $ hg resolve -l -Tjson
   [
    {
     "path": "file1",
     "status": "R"
    },
    {
     "path": "file2",
     "status": "U"
    }
   ]
 
 resolve -m without paths should mark all resolved
 
   $ hg resolve -m
   (no more unresolved files)
   $ hg commit -m 'resolved'
 
 resolve -l should be empty after commit
 
   $ hg resolve -l
 
   $ hg resolve -l -Tjson
   [
   ]
 
 resolve --all should abort when no merge in progress
 
   $ hg resolve --all
   abort: resolve command not applicable when not merging
   [255]
 
 resolve -m should abort when no merge in progress
 
   $ hg resolve -m
   abort: resolve command not applicable when not merging
   [255]
 
 can not update or merge when there are unresolved conflicts
 
   $ hg up -qC 0
   $ echo quux >> file1
   $ hg up 1
   merging file1
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ hg up 0
   abort: outstanding merge conflicts
   [255]
   $ hg merge 2
   abort: outstanding merge conflicts
   [255]
   $ hg merge --force 2
   abort: outstanding merge conflicts
   [255]
 
 set up conflict-free merge
 
   $ hg up -qC 3
   $ hg merge 1
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 resolve --all should do nothing in merge without conflicts
   $ hg resolve --all
   (no more unresolved files)
 
 resolve -m should do nothing in merge without conflicts
 
   $ hg resolve -m
   (no more unresolved files)
 
 get back to conflicting state
 
   $ hg up -qC 2
   $ hg merge --tool=internal:fail 1
   0 files updated, 0 files merged, 0 files removed, 2 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
 resolve without arguments should suggest --all
   $ hg resolve
   abort: no files or directories specified
   (use --all to re-merge all unresolved files)
   [255]
 
 resolve --all should re-merge all unresolved files
   $ hg resolve --all
   merging file1
   merging file2
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging file2! (edit, then use 'hg resolve --mark')
   [1]
   $ cat file1.orig
   foo
   baz
   $ cat file2.orig
   foo
   baz
 
 .orig files should exists where specified
   $ hg resolve --all --verbose --config 'ui.origbackuppath=.hg/origbackups'
   merging file1
   creating directory: $TESTTMP/repo/.hg/origbackups (glob)
   merging file2
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging file2! (edit, then use 'hg resolve --mark')
   [1]
   $ ls .hg/origbackups
   file1.orig
   file2.orig
   $ grep '<<<' file1 > /dev/null
   $ grep '<<<' file2 > /dev/null
 
 resolve <file> should re-merge file
   $ echo resolved > file1
   $ hg resolve -q file1
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   [1]
   $ grep '<<<' file1 > /dev/null
 
 test .orig behavior with resolve
 
   $ hg resolve -q file1 --tool "sh -c 'f --dump \"$TESTTMP/repo/file1.orig\"'"
   $TESTTMP/repo/file1.orig: (glob)
   >>>
   foo
   baz
   <<<
 
 resolve <file> should do nothing if 'file' was marked resolved
   $ echo resolved > file1
   $ hg resolve -m file1
   $ hg resolve -q file1
   $ cat file1
   resolved
 
 insert unsupported advisory merge record
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -x
   $ hg debugmergestate
   * version 2 records
   local: 57653b9f834a4493f7240b0681efcb9ae7cab745
   other: dc77451844e37f03f5c559e3b8529b2b48d381d1
   unrecognized entry: x	advisory record
+  file extras: file1 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
   file: file1 (record type "F", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
     other path: file1 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
+  file extras: file2 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
   file: file2 (record type "F", state "u", hash cb99b709a1978bd205ab9dfd4c5aaa1fc91c7523)
     local path: file2 (flags "")
     ancestor path: file2 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
     other path: file2 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
   $ hg resolve -l
   R file1
   U file2
 
 insert unsupported mandatory merge record
 
   $ hg --config extensions.fakemergerecord=$TESTDIR/fakemergerecord.py fakemergerecord -X
   $ hg debugmergestate
   * version 2 records
   local: 57653b9f834a4493f7240b0681efcb9ae7cab745
   other: dc77451844e37f03f5c559e3b8529b2b48d381d1
+  file extras: file1 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
   file: file1 (record type "F", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
     local path: file1 (flags "")
     ancestor path: file1 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
     other path: file1 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
+  file extras: file2 (ancestorlinknode = 99726c03216e233810a2564cbc0adfe395007eac)
   file: file2 (record type "F", state "u", hash cb99b709a1978bd205ab9dfd4c5aaa1fc91c7523)
     local path: file2 (flags "")
     ancestor path: file2 (node 2ed2a3912a0b24502043eae84ee4b279c18b90dd)
     other path: file2 (node 6f4310b00b9a147241b071a60c28a650827fb03d)
   unrecognized entry: X	mandatory record
   $ hg resolve -l
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
   [255]
   $ hg resolve -ma
   abort: unsupported merge state records: X
   (see https://mercurial-scm.org/wiki/MergeStateRecords for more information)
   [255]
   $ hg summary
   parent: 2:57653b9f834a 
    append baz to files
   parent: 1:dc77451844e3 
    append bar to files
   branch: default
   warning: merge state has unsupported record types: X
   commit: 2 modified, 2 unknown (merge)
   update: 2 new changesets (update)
   phases: 5 draft
 
 update --clean shouldn't abort on unsupported records
 
   $ hg up -qC 1
   $ hg debugmergestate
   no merge state found
 
 test crashed merge with empty mergestate
 
   $ mkdir .hg/merge
   $ touch .hg/merge/state
 
 resolve -l should be empty
 
   $ hg resolve -l
 
   $ cd ..