merge: hint about using `hg resolve` for resolving conflicts

This was suggested by one of our users at Google. Makes sense to me.

Differential Revision: https://phab.mercurial-scm.org/D6755

mercurial/merge.py

@@ -1,2334 +1,2335 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 hashlib
 import shutil
 import stat
 import struct
 
 from .i18n import _
 from .node import (
     addednodeid,
     bin,
     hex,
     modifiednodeid,
     nullhex,
     nullid,
     nullrev,
 )
 from .thirdparty import (
     attr,
 )
 from . import (
     copies,
     encoding,
     error,
     filemerge,
     match as matchmod,
     obsutil,
     pycompat,
     scmutil,
     subrepoutil,
     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)
 
 # Merge state record types. See ``mergestate`` docs for more.
 RECORD_LOCAL = b'L'
 RECORD_OTHER = b'O'
 RECORD_MERGED = b'F'
 RECORD_CHANGEDELETE_CONFLICT = b'C'
 RECORD_MERGE_DRIVER_MERGE = b'D'
 RECORD_PATH_CONFLICT = b'P'
 RECORD_MERGE_DRIVER_STATE = b'm'
 RECORD_FILE_VALUES = b'f'
 RECORD_LABELS = b'l'
 RECORD_OVERRIDE = b't'
 RECORD_UNSUPPORTED_MANDATORY = b'X'
 RECORD_UNSUPPORTED_ADVISORY = b'x'
 
 MERGE_DRIVER_STATE_UNMARKED = b'u'
 MERGE_DRIVER_STATE_MARKED = b'm'
 MERGE_DRIVER_STATE_SUCCESS = b's'
 
 MERGE_RECORD_UNRESOLVED = b'u'
 MERGE_RECORD_RESOLVED = b'r'
 MERGE_RECORD_UNRESOLVED_PATH = b'pu'
 MERGE_RECORD_RESOLVED_PATH = b'pr'
 MERGE_RECORD_DRIVER_RESOLVED = b'd'
 
 ACTION_FORGET = b'f'
 ACTION_REMOVE = b'r'
 ACTION_ADD = b'a'
 ACTION_GET = b'g'
 ACTION_PATH_CONFLICT = b'p'
 ACTION_PATH_CONFLICT_RESOLVE = b'pr'
 ACTION_ADD_MODIFIED = b'am'
 ACTION_CREATED = b'c'
 ACTION_DELETED_CHANGED = b'dc'
 ACTION_CHANGED_DELETED = b'cd'
 ACTION_MERGE = b'm'
 ACTION_LOCAL_DIR_RENAME_GET = b'dg'
 ACTION_DIR_RENAME_MOVE_LOCAL = b'dm'
 ACTION_KEEP = b'k'
 ACTION_EXEC = b'e'
 ACTION_CREATED_MERGE = b'cm'
 
 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)
     P: a path conflict (file vs directory)
     m: the external merge driver defined for this merge plus its run state
        (experimental)
     f: a (filename, dictionary) tuple of optional values for a given file
     X: unsupported mandatory record type (used in tests)
     x: unsupported advisory record type (used in tests)
     l: the labels for the parts of the merge.
 
     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
 
     Merge record states (stored in self._state, indexed by filename):
     u: unresolved conflict
     r: resolved conflict
     pu: unresolved path conflict (file conflicts with directory)
     pr: resolved path conflict
     d: driver-resolved conflict
 
     The resolve command transitions between 'u' and 'r' for conflicts and
     'pu' and 'pr' for path conflicts.
     '''
     statepathv1 = 'merge/state'
     statepathv2 = 'merge/state2'
 
     @staticmethod
     def clean(repo, node=None, other=None, labels=None):
         """Initialize a brand new merge state, removing any existing state on
         disk."""
         ms = mergestate(repo)
         ms.reset(node, other, labels)
         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
         self._labels = None
 
     def reset(self, node=None, other=None, labels=None):
         self._state = {}
         self._stateextras = {}
         self._local = None
         self._other = None
         self._labels = labels
         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 = MERGE_DRIVER_STATE_SUCCESS
         else:
             self._mdstate = MERGE_DRIVER_STATE_UNMARKED
         shutil.rmtree(self._repo.vfs.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 = MERGE_DRIVER_STATE_SUCCESS
         unsupported = set()
         records = self._readrecords()
         for rtype, record in records:
             if rtype == RECORD_LOCAL:
                 self._local = bin(record)
             elif rtype == RECORD_OTHER:
                 self._other = bin(record)
             elif rtype == RECORD_MERGE_DRIVER_STATE:
                 bits = record.split('\0', 1)
                 mdstate = bits[1]
                 if len(mdstate) != 1 or mdstate not in (
                     MERGE_DRIVER_STATE_UNMARKED, MERGE_DRIVER_STATE_MARKED,
                     MERGE_DRIVER_STATE_SUCCESS):
                     # the merge driver should be idempotent, so just rerun it
                     mdstate = MERGE_DRIVER_STATE_UNMARKED
 
                 self._readmergedriver = bits[0]
                 self._mdstate = mdstate
             elif rtype in (RECORD_MERGED, RECORD_CHANGEDELETE_CONFLICT,
                            RECORD_PATH_CONFLICT, RECORD_MERGE_DRIVER_MERGE):
                 bits = record.split('\0')
                 self._state[bits[0]] = bits[1:]
             elif rtype == RECORD_FILE_VALUES:
                 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 rtype == RECORD_LABELS:
                 labels = record.split('\0', 2)
                 self._labels = [l for l in labels if len(l) > 0]
             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((RECORD_OTHER, mctx.hex()))
             # add place holder "other" file node information
             # nobody is using it yet so we do no need to fetch the data
             # if mctx was wrong `mctx[bits[-2]]` may fails.
             for idx, r in enumerate(v1records):
                 if r[0] == RECORD_MERGED:
                     bits = r[1].split('\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] == RECORD_LOCAL:
                 oldv2.add(rec)
             elif rec[0] == RECORD_MERGED:
                 # drop the onode data (not contained in v1)
                 oldv2.add((RECORD_MERGED, _droponode(rec[1])))
         for rec in v1records:
             if rec not in oldv2:
                 return False
         else:
             return True
 
     def _readrecordsv1(self):
         """read on disk merge state for version 1 file
 
         returns list of record [(TYPE, data), ...]
 
         Note: the "F" data from this file are one entry short
               (no "other file node" entry)
         """
         records = []
         try:
             f = self._repo.vfs(self.statepathv1)
             for i, l in enumerate(f):
                 if i == 0:
                     records.append((RECORD_LOCAL, l[:-1]))
                 else:
                     records.append((RECORD_MERGED, l[:-1]))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def _readrecordsv2(self):
         """read on disk merge state for version 2 file
 
         This format is a list of arbitrary records of the form:
 
           [type][length][content]
 
         `type` is a single character, `length` is a 4 byte integer, and
         `content` is an arbitrary byte sequence of length `length`.
 
         Mercurial versions prior to 3.7 have a bug where if there are
         unsupported mandatory merge records, attempting to clear out the merge
         state with hg update --clean or similar aborts. The 't' record type
         works around that by writing out what those versions treat as an
         advisory record, but later versions interpret as special: the first
         character is the 'real' record type and everything onwards is the data.
 
         Returns list of records [(TYPE, data), ...]."""
         records = []
         try:
             f = self._repo.vfs(self.statepathv2)
             data = f.read()
             off = 0
             end = len(data)
             while off < end:
                 rtype = data[off:off + 1]
                 off += 1
                 length = _unpack('>I', data[off:(off + 4)])[0]
                 off += 4
                 record = data[off:(off + length)]
                 off += length
                 if rtype == RECORD_OVERRIDE:
                     rtype, record = record[0:1], record[1:]
                 records.append((rtype, record))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     @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:
             msg = "localctx accessed but self._local isn't set"
             raise error.ProgrammingError(msg)
         return self._repo[self._local]
 
     @util.propertycache
     def otherctx(self):
         if self._other is None:
             msg = "otherctx accessed but self._other isn't set"
             raise error.ProgrammingError(msg)
         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((RECORD_LOCAL, hex(self._local)))
         records.append((RECORD_OTHER, hex(self._other)))
         if self.mergedriver:
             records.append((RECORD_MERGE_DRIVER_STATE, '\0'.join([
                 self.mergedriver, self._mdstate])))
         # Write out state items. In all cases, the value of the state map entry
         # is written as the contents of the record. The record type depends on
         # the type of state that is stored, and capital-letter records are used
         # to prevent older versions of Mercurial that do not support the feature
         # from loading them.
         for filename, v in self._state.iteritems():
             if v[0] == MERGE_RECORD_DRIVER_RESOLVED:
                 # Driver-resolved merge. These are stored in 'D' records.
                 records.append((RECORD_MERGE_DRIVER_MERGE,
                                 '\0'.join([filename] + v)))
             elif v[0] in (MERGE_RECORD_UNRESOLVED_PATH,
                           MERGE_RECORD_RESOLVED_PATH):
                 # Path conflicts. These are stored in 'P' records.  The current
                 # resolution state ('pu' or 'pr') is stored within the record.
                 records.append((RECORD_PATH_CONFLICT,
                                 '\0'.join([filename] + v)))
             elif v[1] == nullhex or v[6] == nullhex:
                 # Change/Delete or Delete/Change conflicts. These are stored in
                 # 'C' records. v[1] is the local file, and is nullhex when the
                 # file is deleted locally ('dc'). v[6] is the remote file, and
                 # is nullhex when the file is deleted remotely ('cd').
                 records.append((RECORD_CHANGEDELETE_CONFLICT,
                                 '\0'.join([filename] + v)))
             else:
                 # Normal files.  These are stored in 'F' records.
                 records.append((RECORD_MERGED,
                                 '\0'.join([filename] + 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((RECORD_FILE_VALUES,
                             '%s\0%s' % (filename, rawextras)))
         if self._labels is not None:
             labels = '\0'.join(self._labels)
             records.append((RECORD_LABELS, labels))
         return records
 
     def _writerecords(self, records):
         """Write current state on disk (both v1 and v2)"""
         self._writerecordsv1(records)
         self._writerecordsv2(records)
 
     def _writerecordsv1(self, records):
         """Write current state on disk in a version 1 file"""
         f = self._repo.vfs(self.statepathv1, 'wb')
         irecords = iter(records)
         lrecords = next(irecords)
         assert lrecords[0] == RECORD_LOCAL
         f.write(hex(self._local) + '\n')
         for rtype, data in irecords:
             if rtype == RECORD_MERGED:
                 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
         allowlist = (RECORD_LOCAL, RECORD_OTHER, RECORD_MERGED)
         f = self._repo.vfs(self.statepathv2, 'wb')
         for key, data in records:
             assert len(key) == 1
             if key not in allowlist:
                 key, data = RECORD_OVERRIDE, '%s%s' % (key, data)
             format = '>sI%is' % len(data)
             f.write(_pack(format, key, len(data), data))
         f.close()
 
     @staticmethod
     def getlocalkey(path):
         """hash the path of a local file context for storage in the .hg/merge
         directory."""
 
         return hex(hashlib.sha1(path).digest())
 
     def add(self, fcl, fco, fca, fd):
         """add a new (potentially?) conflicting file the merge state
         fcl: file context for local,
         fco: file context for remote,
         fca: file context for ancestors,
         fd:  file path of the resulting merge.
 
         note: also write the local version to the `.hg/merge` directory.
         """
         if fcl.isabsent():
             localkey = nullhex
         else:
             localkey = mergestate.getlocalkey(fcl.path())
             self._repo.vfs.write('merge/' + localkey, fcl.data())
         self._state[fd] = [MERGE_RECORD_UNRESOLVED, localkey, 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 addpath(self, path, frename, forigin):
         """add a new conflicting path to the merge state
         path:    the path that conflicts
         frename: the filename the conflicting file was renamed to
         forigin: origin of the file ('l' or 'r' for local/remote)
         """
         self._state[path] = [MERGE_RECORD_UNRESOLVED_PATH, frename, forigin]
         self._dirty = True
 
     def __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.iteritems():
             if entry[0] in (MERGE_RECORD_UNRESOLVED,
                             MERGE_RECORD_UNRESOLVED_PATH):
                 yield f
 
     def driverresolved(self):
         """Obtain the paths of driver-resolved files."""
 
         for f, entry in self._state.items():
             if entry[0] == MERGE_RECORD_DRIVER_RESOLVED:
                 yield f
 
     def extras(self, filename):
         return self._stateextras.setdefault(filename, {})
 
     def _resolve(self, preresolve, dfile, wctx):
         """rerun merge process for file path `dfile`"""
         if self[dfile] in (MERGE_RECORD_RESOLVED,
                            MERGE_RECORD_DRIVER_RESOLVED):
             return True, 0
         stateentry = self._state[dfile]
         state, localkey, lfile, afile, anode, ofile, onode, flags = stateentry
         octx = self._repo[self._other]
         extras = self.extras(dfile)
         anccommitnode = extras.get('ancestorlinknode')
         if anccommitnode:
             actx = self._repo[anccommitnode]
         else:
             actx = None
         fcd = self._filectxorabsent(localkey, wctx, dfile)
         fco = self._filectxorabsent(onode, octx, ofile)
         # TODO: move this to filectxorabsent
         fca = self._repo.filectx(afile, fileid=anode, changectx=actx)
         # "premerge" x flags
         flo = fco.flags()
         fla = fca.flags()
         if 'x' in flags + flo + fla and 'l' not in flags + flo + fla:
             if fca.node() == nullid and flags != flo:
                 if preresolve:
                     self._repo.ui.warn(
                         _('warning: cannot merge flags for %s '
                           'without common ancestor - keeping local flags\n')
                         % afile)
             elif flags == fla:
                 flags = flo
         if preresolve:
             # restore local
             if localkey != nullhex:
                 f = self._repo.vfs('merge/' + localkey)
                 wctx[dfile].write(f.read(), flags)
                 f.close()
             else:
                 wctx[dfile].remove(ignoremissing=True)
             complete, r, deleted = filemerge.premerge(self._repo, wctx,
                                                       self._local, lfile, fcd,
                                                       fco, fca,
                                                       labels=self._labels)
         else:
             complete, r, deleted = filemerge.filemerge(self._repo, wctx,
                                                        self._local, lfile, fcd,
                                                        fco, fca,
                                                        labels=self._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, MERGE_RECORD_RESOLVED)
 
         if complete:
             action = None
             if deleted:
                 if fcd.isabsent():
                     # dc: local picked. Need to drop if present, which may
                     # happen on re-resolves.
                     action = ACTION_FORGET
                 else:
                     # cd: remote picked (or otherwise deleted)
                     action = ACTION_REMOVE
             else:
                 if fcd.isabsent(): # dc: remote picked
                     action = ACTION_GET
                 elif fco.isabsent(): # cd: local picked
                     if dfile in self.localctx:
                         action = ACTION_ADD_MODIFIED
                     else:
                         action = ACTION_ADD
                 # else: regular merges (no action necessary)
             self._results[dfile] = 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):
         """run premerge process for dfile
 
         Returns whether the merge is complete, and the exit code."""
         return self._resolve(True, dfile, wctx)
 
     def resolve(self, dfile, wctx):
         """run merge process (assuming premerge was run) for dfile
 
         Returns the exit code of the merge."""
         return self._resolve(False, dfile, wctx)[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 == ACTION_REMOVE:
                     removed += 1
                 else:
                     merged += 1
         return updated, merged, removed
 
     def unresolvedcount(self):
         """get unresolved count for this merge (persistent)"""
         return len(list(self.unresolved()))
 
     def actions(self):
         """return lists of actions to perform on the dirstate"""
         actions = {
             ACTION_REMOVE: [],
             ACTION_FORGET: [],
             ACTION_ADD: [],
             ACTION_ADD_MODIFIED: [],
             ACTION_GET: [],
         }
         for f, (r, action) in 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, None)
 
     def queueremove(self, f):
         """queues a file to be removed from the dirstate
 
         Meant for use by custom merge drivers."""
         self._results[f] = 0, ACTION_REMOVE
 
     def queueadd(self, f):
         """queues a file to be added to the dirstate
 
         Meant for use by custom merge drivers."""
         self._results[f] = 0, ACTION_ADD
 
     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, ACTION_GET
 
 def _getcheckunknownconfig(repo, section, name):
     config = repo.ui.config(section, name)
     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 wctx.isinmemory():
         # Nothing to do in IMM because nothing in the "working copy" can be an
         # unknown file.
         #
         # Note that we should bail out here, not in ``_checkunknownfiles()``,
         # because that function does other useful work.
         return False
 
     if f2 is None:
         f2 = f
     return (repo.wvfs.audit.check(f)
         and repo.wvfs.isfileorlink(f)
         and repo.dirstate.normalize(f) not in repo.dirstate
         and mctx[f2].cmp(wctx[f]))
 
 class _unknowndirschecker(object):
     """
     Look for any unknown files or directories that may have a path conflict
     with a file.  If any path prefix of the file exists as a file or link,
     then it conflicts.  If the file itself is a directory that contains any
     file that is not tracked, then it conflicts.
 
     Returns the shortest path at which a conflict occurs, or None if there is
     no conflict.
     """
     def __init__(self):
         # A set of paths known to be good.  This prevents repeated checking of
         # dirs.  It will be updated with any new dirs that are checked and found
         # to be safe.
         self._unknowndircache = set()
 
         # A set of paths that are known to be absent.  This prevents repeated
         # checking of subdirectories that are known not to exist. It will be
         # updated with any new dirs that are checked and found to be absent.
         self._missingdircache = set()
 
     def __call__(self, repo, wctx, f):
         if wctx.isinmemory():
             # Nothing to do in IMM for the same reason as ``_checkunknownfile``.
             return False
 
         # Check for path prefixes that exist as unknown files.
         for p in reversed(list(util.finddirs(f))):
             if p in self._missingdircache:
                 return
             if p in self._unknowndircache:
                 continue
             if repo.wvfs.audit.check(p):
                 if (repo.wvfs.isfileorlink(p)
                         and repo.dirstate.normalize(p) not in repo.dirstate):
                     return p
                 if not repo.wvfs.lexists(p):
                     self._missingdircache.add(p)
                     return
                 self._unknowndircache.add(p)
 
         # Check if the file conflicts with a directory containing unknown files.
         if repo.wvfs.audit.check(f) and repo.wvfs.isdir(f):
             # Does the directory contain any files that are not in the dirstate?
             for p, dirs, files in repo.wvfs.walk(f):
                 for fn in files:
                     relf = util.pconvert(repo.wvfs.reljoin(p, fn))
                     relf = repo.dirstate.normalize(relf, isknown=True)
                     if relf not in repo.dirstate:
                         return f
         return None
 
 def _checkunknownfiles(repo, wctx, mctx, force, actions, mergeforce):
     """
     Considers any actions that care about the presence of conflicting unknown
     files. For some actions, the result is to abort; for others, it is to
     choose a different action.
     """
     fileconflicts = set()
     pathconflicts = set()
     warnconflicts = set()
     abortconflicts = set()
     unknownconfig = _getcheckunknownconfig(repo, 'merge', 'checkunknown')
     ignoredconfig = _getcheckunknownconfig(repo, 'merge', 'checkignored')
     pathconfig = repo.ui.configbool('experimental', 'merge.checkpathconflicts')
     if not force:
         def collectconflicts(conflicts, config):
             if config == 'abort':
                 abortconflicts.update(conflicts)
             elif config == 'warn':
                 warnconflicts.update(conflicts)
 
         checkunknowndirs = _unknowndirschecker()
         for f, (m, args, msg) in actions.iteritems():
             if m in (ACTION_CREATED, ACTION_DELETED_CHANGED):
                 if _checkunknownfile(repo, wctx, mctx, f):
                     fileconflicts.add(f)
                 elif pathconfig and f not in wctx:
                     path = checkunknowndirs(repo, wctx, f)
                     if path is not None:
                         pathconflicts.add(path)
             elif m == ACTION_LOCAL_DIR_RENAME_GET:
                 if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                     fileconflicts.add(f)
 
         allconflicts = fileconflicts | pathconflicts
         ignoredconflicts = {c for c in allconflicts
                             if repo.dirstate._ignore(c)}
         unknownconflicts = allconflicts - ignoredconflicts
         collectconflicts(ignoredconflicts, ignoredconfig)
         collectconflicts(unknownconflicts, unknownconfig)
     else:
         for f, (m, args, msg) in actions.iteritems():
             if m == ACTION_CREATED_MERGE:
                 fl2, anc = args
                 different = _checkunknownfile(repo, wctx, mctx, f)
                 if repo.dirstate._ignore(f):
                     config = ignoredconfig
                 else:
                     config = unknownconfig
 
                 # The behavior when force is True is described by this table:
                 #  config  different  mergeforce  |    action    backup
                 #    *         n          *       |      get        n
                 #    *         y          y       |     merge       -
                 #   abort      y          n       |     merge       -   (1)
                 #   warn       y          n       |  warn + get     y
                 #  ignore      y          n       |      get        y
                 #
                 # (1) this is probably the wrong behavior here -- we should
                 #     probably abort, but some actions like rebases currently
                 #     don't like an abort happening in the middle of
                 #     merge.update.
                 if not different:
                     actions[f] = (ACTION_GET, (fl2, False), 'remote created')
                 elif mergeforce or config == 'abort':
                     actions[f] = (ACTION_MERGE, (f, f, None, False, anc),
                                   'remote differs from untracked local')
                 elif config == 'abort':
                     abortconflicts.add(f)
                 else:
                     if config == 'warn':
                         warnconflicts.add(f)
                     actions[f] = (ACTION_GET, (fl2, True), 'remote created')
 
     for f in sorted(abortconflicts):
         warn = repo.ui.warn
         if f in pathconflicts:
             if repo.wvfs.isfileorlink(f):
                 warn(_("%s: untracked file conflicts with directory\n") % f)
             else:
                 warn(_("%s: untracked directory conflicts with file\n") % f)
         else:
             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):
         if repo.wvfs.isfileorlink(f):
             repo.ui.warn(_("%s: replacing untracked file\n") % f)
         else:
             repo.ui.warn(_("%s: replacing untracked files in directory\n") % f)
 
     for f, (m, args, msg) in actions.iteritems():
         if m == ACTION_CREATED:
             backup = (f in fileconflicts or f in pathconflicts or
                       any(p in pathconflicts for p in util.finddirs(f)))
             flags, = args
             actions[f] = (ACTION_GET, (flags, backup), msg)
 
 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 = ACTION_FORGET
     if branchmerge:
         m = ACTION_REMOVE
     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] = ACTION_FORGET, None, "forget removed"
 
     return actions
 
 def _checkcollision(repo, wmf, actions):
     """
     Check for case-folding collisions.
     """
 
     # If the repo is narrowed, filter out files outside the narrowspec.
     narrowmatch = repo.narrowmatch()
     if not narrowmatch.always():
         wmf = wmf.matches(narrowmatch)
         if actions:
             narrowactions = {}
             for m, actionsfortype in actions.iteritems():
                 narrowactions[m] = []
                 for (f, args, msg) in actionsfortype:
                     if narrowmatch(f):
                         narrowactions[m].append((f, args, msg))
             actions = narrowactions
 
     # build provisional merged manifest up
     pmmf = set(wmf)
 
     if actions:
         # KEEP and EXEC are no-op
         for m in (ACTION_ADD, ACTION_ADD_MODIFIED, ACTION_FORGET, ACTION_GET,
                   ACTION_CHANGED_DELETED, ACTION_DELETED_CHANGED):
             for f, args, msg in actions[m]:
                 pmmf.add(f)
         for f, args, msg in actions[ACTION_REMOVE]:
             pmmf.discard(f)
         for f, args, msg in actions[ACTION_DIR_RENAME_MOVE_LOCAL]:
             f2, flags = args
             pmmf.discard(f2)
             pmmf.add(f)
         for f, args, msg in actions[ACTION_LOCAL_DIR_RENAME_GET]:
             pmmf.add(f)
         for f, args, msg in actions[ACTION_MERGE]:
             f1, f2, fa, move, anc = args
             if move:
                 pmmf.discard(f1)
             pmmf.add(f)
 
     # check case-folding collision in provisional merged manifest
     foldmap = {}
     for f in pmmf:
         fold = util.normcase(f)
         if fold in foldmap:
             raise error.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 _filesindirs(repo, manifest, dirs):
     """
     Generator that yields pairs of all the files in the manifest that are found
     inside the directories listed in dirs, and which directory they are found
     in.
     """
     for f in manifest:
         for p in util.finddirs(f):
             if p in dirs:
                 yield f, p
                 break
 
 def checkpathconflicts(repo, wctx, mctx, actions):
     """
     Check if any actions introduce path conflicts in the repository, updating
     actions to record or handle the path conflict accordingly.
     """
     mf = wctx.manifest()
 
     # The set of local files that conflict with a remote directory.
     localconflicts = set()
 
     # The set of directories that conflict with a remote file, and so may cause
     # conflicts if they still contain any files after the merge.
     remoteconflicts = set()
 
     # The set of directories that appear as both a file and a directory in the
     # remote manifest.  These indicate an invalid remote manifest, which
     # can't be updated to cleanly.
     invalidconflicts = set()
 
     # The set of directories that contain files that are being created.
     createdfiledirs = set()
 
     # The set of files deleted by all the actions.
     deletedfiles = set()
 
     for f, (m, args, msg) in actions.items():
         if m in (ACTION_CREATED, ACTION_DELETED_CHANGED, ACTION_MERGE,
                  ACTION_CREATED_MERGE):
             # This action may create a new local file.
             createdfiledirs.update(util.finddirs(f))
             if mf.hasdir(f):
                 # The file aliases a local directory.  This might be ok if all
                 # the files in the local directory are being deleted.  This
                 # will be checked once we know what all the deleted files are.
                 remoteconflicts.add(f)
         # Track the names of all deleted files.
         if m == ACTION_REMOVE:
             deletedfiles.add(f)
         if m == ACTION_MERGE:
             f1, f2, fa, move, anc = args
             if move:
                 deletedfiles.add(f1)
         if m == ACTION_DIR_RENAME_MOVE_LOCAL:
             f2, flags = args
             deletedfiles.add(f2)
 
     # Check all directories that contain created files for path conflicts.
     for p in createdfiledirs:
         if p in mf:
             if p in mctx:
                 # A file is in a directory which aliases both a local
                 # and a remote file.  This is an internal inconsistency
                 # within the remote manifest.
                 invalidconflicts.add(p)
             else:
                 # A file is in a directory which aliases a local file.
                 # We will need to rename the local file.
                 localconflicts.add(p)
         if p in actions and actions[p][0] in (ACTION_CREATED,
                                               ACTION_DELETED_CHANGED,
                                               ACTION_MERGE,
                                               ACTION_CREATED_MERGE):
             # The file is in a directory which aliases a remote file.
             # This is an internal inconsistency within the remote
             # manifest.
             invalidconflicts.add(p)
 
     # Rename all local conflicting files that have not been deleted.
     for p in localconflicts:
         if p not in deletedfiles:
             ctxname = bytes(wctx).rstrip('+')
             pnew = util.safename(p, ctxname, wctx, set(actions.keys()))
             actions[pnew] = (ACTION_PATH_CONFLICT_RESOLVE, (p,),
                              'local path conflict')
             actions[p] = (ACTION_PATH_CONFLICT, (pnew, 'l'),
                           'path conflict')
 
     if remoteconflicts:
         # Check if all files in the conflicting directories have been removed.
         ctxname = bytes(mctx).rstrip('+')
         for f, p in _filesindirs(repo, mf, remoteconflicts):
             if f not in deletedfiles:
                 m, args, msg = actions[p]
                 pnew = util.safename(p, ctxname, wctx, set(actions.keys()))
                 if m in (ACTION_DELETED_CHANGED, ACTION_MERGE):
                     # Action was merge, just update target.
                     actions[pnew] = (m, args, msg)
                 else:
                     # Action was create, change to renamed get action.
                     fl = args[0]
                     actions[pnew] = (ACTION_LOCAL_DIR_RENAME_GET, (p, fl),
                                      'remote path conflict')
                 actions[p] = (ACTION_PATH_CONFLICT, (pnew, ACTION_REMOVE),
                               'path conflict')
                 remoteconflicts.remove(p)
                 break
 
     if invalidconflicts:
         for p in invalidconflicts:
             repo.ui.warn(_("%s: is both a file and a directory\n") % p)
         raise error.Abort(_("destination manifest contains path conflicts"))
 
 def _filternarrowactions(narrowmatch, branchmerge, actions):
     """
     Filters out actions that can ignored because the repo is narrowed.
 
     Raise an exception if the merge cannot be completed because the repo is
     narrowed.
     """
     nooptypes = {'k'} # TODO: handle with nonconflicttypes
     nonconflicttypes = set('a am c cm f g r e'.split())
     # We mutate the items in the dict during iteration, so iterate
     # over a copy.
     for f, action in list(actions.items()):
         if narrowmatch(f):
             pass
         elif not branchmerge:
             del actions[f] # just updating, ignore changes outside clone
         elif action[0] in nooptypes:
             del actions[f] # merge does not affect file
         elif action[0] in nonconflicttypes:
             raise error.Abort(_('merge affects file \'%s\' outside narrow, '
                                 'which is not yet supported') % f,
                               hint=_('merging in the other direction '
                                      'may work'))
         else:
             raise error.Abort(_('conflict in file \'%s\' is outside '
                                 'narrow clone') % f)
 
 def manifestmerge(repo, wctx, p2, pa, branchmerge, force, matcher,
                   acceptremote, followcopies, forcefulldiff=False):
     """
     Merge wctx and p2 with ancestor pa and generate merge action list
 
     branchmerge and force are as passed in to update
     matcher = matcher to filter file lists
     acceptremote = accept the incoming changes without prompting
     """
     if matcher is not None and matcher.always():
         matcher = None
 
     copy, movewithdir, diverge, renamedelete, dirmove = {}, {}, {}, {}, {}
 
     # manifests fetched in order are going to be faster, so prime the caches
     [x.manifest() for x in
      sorted(wctx.parents() + [p2, pa], key=scmutil.intrev)]
 
     if followcopies:
         ret = copies.mergecopies(repo, wctx, p2, pa)
         copy, movewithdir, diverge, renamedelete, dirmove = ret
 
     boolbm = pycompat.bytestr(bool(branchmerge))
     boolf = pycompat.bytestr(bool(force))
     boolm = pycompat.bytestr(bool(matcher))
     repo.ui.note(_("resolving manifests\n"))
     repo.ui.debug(" branchmerge: %s, force: %s, partial: %s\n"
                   % (boolbm, boolf, boolm))
     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 and wctx.rev() is None:
         # Check whether sub state is modified, and overwrite the manifest
         # to flag the change. If wctx is a committed revision, we shouldn't
         # care for the dirty state of the working directory.
         if any(wctx.sub(s).dirty() for s in wctx.substate):
             m1['.hgsubstate'] = modifiednodeid
 
     # Don't use m2-vs-ma optimization if:
     # - ma is the same as m1 or m2, which we're just going to diff again later
     # - The caller specifically asks for a full diff, which is useful during bid
     #   merge.
     if (pa not in ([wctx, p2] + wctx.parents()) and not forcefulldiff):
         # Identify which files are relevant to the merge, so we can limit the
         # total m1-vs-m2 diff to just those files. This has significant
         # performance benefits in large repositories.
         relevantfiles = set(ma.diff(m2).keys())
 
         # For copied and moved files, we need to add the source file too.
         for copykey, copyvalue in copy.iteritems():
             if copyvalue in relevantfiles:
                 relevantfiles.add(copykey)
         for movedirkey in movewithdir:
             relevantfiles.add(movedirkey)
         filesmatcher = scmutil.matchfiles(repo, relevantfiles)
         matcher = matchmod.intersectmatchers(matcher, filesmatcher)
 
     diff = m1.diff(m2, match=matcher)
 
     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] = (ACTION_MERGE, (f, f, fa, False, pa.node()),
                                   'both renamed from %s' % fa)
                 else:
                     actions[f] = (ACTION_MERGE, (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] = (ACTION_KEEP, (), 'remote unchanged')
                 elif n1 == a and fl1 == fla: # local unchanged - use remote
                     if n1 == n2: # optimization: keep local content
                         actions[f] = (ACTION_EXEC, (fl2,), 'update permissions')
                     else:
                         actions[f] = (ACTION_GET, (fl2, False),
                                       'remote is newer')
                 elif nol and n2 == a: # remote only changed 'x'
                     actions[f] = (ACTION_EXEC, (fl2,), 'update permissions')
                 elif nol and n1 == a: # local only changed 'x'
                     actions[f] = (ACTION_GET, (fl1, False), 'remote is newer')
                 else: # both changed something
                     actions[f] = (ACTION_MERGE, (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] = (ACTION_MERGE, (f, f2, None, True, pa.node()),
                                    'remote directory rename, both created')
                 else:
                     actions[f2] = (ACTION_DIR_RENAME_MOVE_LOCAL, (f, fl1),
                                    'remote directory rename - move from %s' % f)
             elif f in copy:
                 f2 = copy[f]
                 actions[f] = (ACTION_MERGE, (f, f2, f2, False, pa.node()),
                               'local copied/moved from %s' % f2)
             elif f in ma: # clean, a different, no remote
                 if n1 != ma[f]:
                     if acceptremote:
                         actions[f] = (ACTION_REMOVE, None, 'remote delete')
                     else:
                         actions[f] = (ACTION_CHANGED_DELETED,
                                       (f, None, f, False, pa.node()),
                                       'prompt changed/deleted')
                 elif n1 == addednodeid:
                     # 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] = (ACTION_FORGET, None, 'remote deleted')
                 else:
                     actions[f] = (ACTION_REMOVE, 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] = (ACTION_MERGE,
                                    (f2, f, None, False, pa.node()),
                                    'local directory rename, both created')
                 else:
                     actions[f2] = (ACTION_LOCAL_DIR_RENAME_GET, (f, fl2),
                                    'local directory rename - get from %s' % f)
             elif f in copy:
                 f2 = copy[f]
                 if f2 in m2:
                     actions[f] = (ACTION_MERGE, (f2, f, f2, False, pa.node()),
                                   'remote copied from %s' % f2)
                 else:
                     actions[f] = (ACTION_MERGE, (f2, f, f2, True, pa.node()),
                                   'remote moved from %s' % 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] = (ACTION_CREATED, (fl2,), 'remote created')
                 elif not branchmerge:
                     actions[f] = (ACTION_CREATED, (fl2,), 'remote created')
                 else:
                     actions[f] = (ACTION_CREATED_MERGE, (fl2, pa.node()),
                                   'remote created, get or merge')
             elif n2 != ma[f]:
                 df = None
                 for d in dirmove:
                     if f.startswith(d):
                         # new file added in a directory that was moved
                         df = dirmove[d] + f[len(d):]
                         break
                 if df is not None and df in m1:
                     actions[df] = (ACTION_MERGE, (df, f, f, False, pa.node()),
                                    'local directory rename - respect move '
                                    'from %s' % f)
                 elif acceptremote:
                     actions[f] = (ACTION_CREATED, (fl2,), 'remote recreating')
                 else:
                     actions[f] = (ACTION_DELETED_CHANGED,
                                   (None, f, f, False, pa.node()),
                                   'prompt deleted/changed')
 
     if repo.ui.configbool('experimental', 'merge.checkpathconflicts'):
         # If we are merging, look for path conflicts.
         checkpathconflicts(repo, wctx, p2, actions)
 
     narrowmatch = repo.narrowmatch()
     if not narrowmatch.always():
         # Updates "actions" in place
         _filternarrowactions(narrowmatch, branchmerge, actions)
 
     return actions, diverge, renamedelete
 
 def _resolvetrivial(repo, wctx, mctx, ancestor, actions):
     """Resolves false conflicts where the nodeid changed but the content
        remained the same."""
     # We force a copy of actions.items() because we're going to mutate
     # actions as we resolve trivial conflicts.
     for f, (m, args, msg) in list(actions.items()):
         if (m == ACTION_CHANGED_DELETED and f in ancestor
             and not wctx[f].cmp(ancestor[f])):
             # local did change but ended up with same content
             actions[f] = ACTION_REMOVE, None, 'prompt same'
         elif (m == ACTION_DELETED_CHANGED 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,
                      mergeforce=False):
     """Calculate the actions needed to merge mctx into wctx using ancestors"""
     # Avoid cycle.
     from . import sparse
 
     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, mergeforce)
 
     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(pycompat.bytestr(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, forcefulldiff=True)
             _checkunknownfiles(repo, wctx, mctx, force, actions, mergeforce)
 
             # 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 = list(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 ACTION_KEEP in bids:
                 repo.ui.note(_(" %s: picking 'keep' action\n") % f)
                 actions[f] = bids[ACTION_KEEP][0]
                 continue
             # If there are gets and they all agree [how could they not?], do it.
             if ACTION_GET in bids:
                 ga0 = bids[ACTION_GET][0]
                 if all(a == ga0 for a in bids[ACTION_GET][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 = list(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'))
 
     if wctx.rev() is None:
         fractions = _forgetremoved(wctx, mctx, branchmerge)
         actions.update(fractions)
 
     prunedactions = sparse.filterupdatesactions(repo, wctx, mctx, branchmerge,
                                                 actions)
     _resolvetrivial(repo, wctx, mctx, ancestors[0], actions)
 
     return prunedactions, diverge, renamedelete
 
 def _getcwd():
     try:
         return encoding.getcwd()
     except OSError as err:
         if err.errno == errno.ENOENT:
             return None
         raise
 
 def batchremove(repo, wctx, actions):
     """apply removes to the working directory
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     cwd = _getcwd()
     i = 0
     for f, args, msg in actions:
         repo.ui.debug(" %s: %s -> r\n" % (f, msg))
         if verbose:
             repo.ui.note(_("removing %s\n") % f)
         wctx[f].audit()
         try:
             wctx[f].remove(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
 
     if cwd and not _getcwd():
         # cwd was removed in the course of removing files; print a helpful
         # warning.
         repo.ui.warn(_("current directory was removed\n"
                        "(consider changing to repo root: %s)\n") % repo.root)
 
 def batchget(repo, mctx, wctx, wantfiledata, actions):
     """apply gets to the working directory
 
     mctx is the context to get from
 
     Yields arbitrarily many (False, tuple) for progress updates, followed by
     exactly one (True, filedata). When wantfiledata is false, filedata is an
     empty dict. When wantfiledata is true, filedata[f] is a triple (mode, size,
     mtime) of the file f written for each action.
     """
     filedata = {}
     verbose = repo.ui.verbose
     fctx = mctx.filectx
     ui = repo.ui
     i = 0
     with repo.wvfs.backgroundclosing(ui, expectedcount=len(actions)):
         for f, (flags, backup), msg in actions:
             repo.ui.debug(" %s: %s -> g\n" % (f, msg))
             if verbose:
                 repo.ui.note(_("getting %s\n") % f)
 
             if backup:
                 # If a file or directory exists with the same name, back that
                 # up.  Otherwise, look to see if there is a file that conflicts
                 # with a directory this file is in, and if so, back that up.
                 conflicting = f
                 if not repo.wvfs.lexists(f):
                     for p in util.finddirs(f):
                         if repo.wvfs.isfileorlink(p):
                             conflicting = p
                             break
                 if repo.wvfs.lexists(conflicting):
                     orig = scmutil.backuppath(ui, repo, conflicting)
                     util.rename(repo.wjoin(conflicting), orig)
             wfctx = wctx[f]
             wfctx.clearunknown()
             atomictemp = ui.configbool("experimental", "update.atomic-file")
             size = wfctx.write(fctx(f).data(), flags,
                                backgroundclose=True,
                                atomictemp=atomictemp)
             if wantfiledata:
                 s = wfctx.lstat()
                 mode = s.st_mode
                 mtime = s[stat.ST_MTIME]
                 filedata[f] = ((mode, size, mtime)) # for dirstate.normal
             if i == 100:
                 yield False, (i, f)
                 i = 0
             i += 1
     if i > 0:
         yield False, (i, f)
     yield True, filedata
 
 def _prefetchfiles(repo, ctx, actions):
     """Invoke ``scmutil.prefetchfiles()`` for the files relevant to the dict
     of merge actions.  ``ctx`` is the context being merged in."""
 
     # Skipping 'a', 'am', 'f', 'r', 'dm', 'e', 'k', 'p' and 'pr', because they
     # don't touch the context to be merged in.  'cd' is skipped, because
     # changed/deleted never resolves to something from the remote side.
     oplist = [actions[a] for a in (ACTION_GET, ACTION_DELETED_CHANGED,
                                    ACTION_LOCAL_DIR_RENAME_GET, ACTION_MERGE)]
     prefetch = scmutil.prefetchfiles
     matchfiles = scmutil.matchfiles
     prefetch(repo, [ctx.rev()],
              matchfiles(repo,
                         [f for sublist in oplist for f, args, msg in sublist]))
 
 @attr.s(frozen=True)
 class updateresult(object):
     updatedcount = attr.ib()
     mergedcount = attr.ib()
     removedcount = attr.ib()
     unresolvedcount = attr.ib()
 
     def isempty(self):
         return not (self.updatedcount or self.mergedcount
                     or self.removedcount or self.unresolvedcount)
 
 def emptyactions():
     """create an actions dict, to be populated and passed to applyupdates()"""
     return dict((m, [])
                 for m in (
                     ACTION_ADD,
                     ACTION_ADD_MODIFIED,
                     ACTION_FORGET,
                     ACTION_GET,
                     ACTION_CHANGED_DELETED,
                     ACTION_DELETED_CHANGED,
                     ACTION_REMOVE,
                     ACTION_DIR_RENAME_MOVE_LOCAL,
                     ACTION_LOCAL_DIR_RENAME_GET,
                     ACTION_MERGE,
                     ACTION_EXEC,
                     ACTION_KEEP,
                     ACTION_PATH_CONFLICT,
                     ACTION_PATH_CONFLICT_RESOLVE))
 
 def applyupdates(repo, actions, wctx, mctx, overwrite, wantfiledata,
                  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, filedata), where counts is a tuple
     (updated, merged, removed, unresolved) that describes how many
     files were affected by the update, and filedata is as described in
     batchget.
     """
 
     _prefetchfiles(repo, mctx, actions)
 
     updated, merged, removed = 0, 0, 0
     ms = mergestate.clean(repo, wctx.p1().node(), mctx.node(), labels)
     moves = []
     for m, l in actions.items():
         l.sort()
 
     # 'cd' and 'dc' actions are treated like other merge conflicts
     mergeactions = sorted(actions[ACTION_CHANGED_DELETED])
     mergeactions.extend(sorted(actions[ACTION_DELETED_CHANGED]))
     mergeactions.extend(actions[ACTION_MERGE])
     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)
 
     # remove renamed files after safely stored
     for f in moves:
         if wctx[f].lexists():
             repo.ui.debug("removing %s\n" % f)
             wctx[f].audit()
             wctx[f].remove()
 
     numupdates = sum(len(l) for m, l in actions.items()
                      if m != ACTION_KEEP)
     progress = repo.ui.makeprogress(_('updating'), unit=_('files'),
                                     total=numupdates)
 
     if [a for a in actions[ACTION_REMOVE] if a[0] == '.hgsubstate']:
         subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
 
     # record path conflicts
     for f, args, msg in actions[ACTION_PATH_CONFLICT]:
         f1, fo = args
         s = repo.ui.status
         s(_("%s: path conflict - a file or link has the same name as a "
             "directory\n") % f)
         if fo == 'l':
             s(_("the local file has been renamed to %s\n") % f1)
         else:
             s(_("the remote file has been renamed to %s\n") % f1)
         s(_("resolve manually then use 'hg resolve --mark %s'\n") % f)
         ms.addpath(f, f1, fo)
         progress.increment(item=f)
 
     # When merging in-memory, we can't support worker processes, so set the
     # per-item cost at 0 in that case.
     cost = 0 if wctx.isinmemory() else 0.001
 
     # remove in parallel (must come before resolving path conflicts and getting)
     prog = worker.worker(repo.ui, cost, batchremove, (repo, wctx),
                          actions[ACTION_REMOVE])
     for i, item in prog:
         progress.increment(step=i, item=item)
     removed = len(actions[ACTION_REMOVE])
 
     # resolve path conflicts (must come before getting)
     for f, args, msg in actions[ACTION_PATH_CONFLICT_RESOLVE]:
         repo.ui.debug(" %s: %s -> pr\n" % (f, msg))
         f0, = args
         if wctx[f0].lexists():
             repo.ui.note(_("moving %s to %s\n") % (f0, f))
             wctx[f].audit()
             wctx[f].write(wctx.filectx(f0).data(), wctx.filectx(f0).flags())
             wctx[f0].remove()
         progress.increment(item=f)
 
     # get in parallel.
     threadsafe = repo.ui.configbool('experimental',
                                     'worker.wdir-get-thread-safe')
     prog = worker.worker(repo.ui, cost, batchget,
                          (repo, mctx, wctx, wantfiledata),
                          actions[ACTION_GET],
                          threadsafe=threadsafe,
                          hasretval=True)
     getfiledata = {}
     for final, res in prog:
         if final:
             getfiledata = res
         else:
             i, item = res
             progress.increment(step=i, item=item)
     updated = len(actions[ACTION_GET])
 
     if [a for a in actions[ACTION_GET] if a[0] == '.hgsubstate']:
         subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
 
     # forget (manifest only, just log it) (must come first)
     for f, args, msg in actions[ACTION_FORGET]:
         repo.ui.debug(" %s: %s -> f\n" % (f, msg))
         progress.increment(item=f)
 
     # re-add (manifest only, just log it)
     for f, args, msg in actions[ACTION_ADD]:
         repo.ui.debug(" %s: %s -> a\n" % (f, msg))
         progress.increment(item=f)
 
     # re-add/mark as modified (manifest only, just log it)
     for f, args, msg in actions[ACTION_ADD_MODIFIED]:
         repo.ui.debug(" %s: %s -> am\n" % (f, msg))
         progress.increment(item=f)
 
     # keep (noop, just log it)
     for f, args, msg in actions[ACTION_KEEP]:
         repo.ui.debug(" %s: %s -> k\n" % (f, msg))
         # no progress
 
     # directory rename, move local
     for f, args, msg in actions[ACTION_DIR_RENAME_MOVE_LOCAL]:
         repo.ui.debug(" %s: %s -> dm\n" % (f, msg))
         progress.increment(item=f)
         f0, flags = args
         repo.ui.note(_("moving %s to %s\n") % (f0, f))
         wctx[f].audit()
         wctx[f].write(wctx.filectx(f0).data(), flags)
         wctx[f0].remove()
         updated += 1
 
     # local directory rename, get
     for f, args, msg in actions[ACTION_LOCAL_DIR_RENAME_GET]:
         repo.ui.debug(" %s: %s -> dg\n" % (f, msg))
         progress.increment(item=f)
         f0, flags = args
         repo.ui.note(_("getting %s to %s\n") % (f0, f))
         wctx[f].write(mctx.filectx(f0).data(), flags)
         updated += 1
 
     # exec
     for f, args, msg in actions[ACTION_EXEC]:
         repo.ui.debug(" %s: %s -> e\n" % (f, msg))
         progress.increment(item=f)
         flags, = args
         wctx[f].audit()
         wctx[f].setflags('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:
         if wctx.isinmemory():
             raise error.InMemoryMergeConflictsError("in-memory merge does not "
                                                     "support mergedriver")
         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 updateresult(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
 
     try:
         # premerge
         tocomplete = []
         for f, args, msg in mergeactions:
             repo.ui.debug(" %s: %s -> m (premerge)\n" % (f, msg))
             progress.increment(item=f)
             if f == '.hgsubstate': # subrepo states need updating
                 subrepoutil.submerge(repo, wctx, mctx, wctx.ancestor(mctx),
                                      overwrite, labels)
                 continue
             wctx[f].audit()
             complete, r = ms.preresolve(f, wctx)
             if not complete:
                 numupdates += 1
                 tocomplete.append((f, args, msg))
 
         # merge
         for f, args, msg in tocomplete:
             repo.ui.debug(" %s: %s -> m (merge)\n" % (f, msg))
             progress.increment(item=f, total=numupdates)
             ms.resolve(f, wctx)
 
     finally:
         ms.commit()
 
     unresolved = ms.unresolvedcount()
 
     if (usemergedriver and not unresolved
         and ms.mdstate() != MERGE_DRIVER_STATE_SUCCESS):
         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()
     if extraactions:
         mfiles = set(a[0] for a in actions[ACTION_MERGE])
         for k, acts in extraactions.iteritems():
             actions[k].extend(acts)
             if k == ACTION_GET and wantfiledata:
                 # no filedata until mergestate is updated to provide it
                 for a in acts:
                     getfiledata[a[0]] = None
             # Remove these files from actions[ACTION_MERGE] as well. This is
             # important because in recordupdates, files in actions[ACTION_MERGE]
             # are processed after files in other actions, and the merge driver
             # might add files to those actions via extraactions above. This can
             # lead to a file being recorded twice, with poor results. This is
             # especially problematic for actions[ACTION_REMOVE] (currently only
             # possible with the merge driver in the initial merge process;
             # interrupted merges don't go through this flow).
             #
             # The real fix here is to have indexes by both file and action so
             # that when the action for a file is changed it is automatically
             # reflected in the other action lists. But that involves a more
             # complex data structure, so this will do for now.
             #
             # We don't need to do the same operation for 'dc' and 'cd' because
             # those lists aren't consulted again.
             mfiles.difference_update(a[0] for a in acts)
 
         actions[ACTION_MERGE] = [a for a in actions[ACTION_MERGE]
                                  if a[0] in mfiles]
 
     progress.complete()
     assert len(getfiledata) == (len(actions[ACTION_GET]) if wantfiledata else 0)
     return updateresult(updated, merged, removed, unresolved), getfiledata
 
 def recordupdates(repo, actions, branchmerge, getfiledata):
     "record merge actions to the dirstate"
     # remove (must come first)
     for f, args, msg in actions.get(ACTION_REMOVE, []):
         if branchmerge:
             repo.dirstate.remove(f)
         else:
             repo.dirstate.drop(f)
 
     # forget (must come first)
     for f, args, msg in actions.get(ACTION_FORGET, []):
         repo.dirstate.drop(f)
 
     # resolve path conflicts
     for f, args, msg in actions.get(ACTION_PATH_CONFLICT_RESOLVE, []):
         f0, = args
         origf0 = repo.dirstate.copied(f0) or f0
         repo.dirstate.add(f)
         repo.dirstate.copy(origf0, f)
         if f0 == origf0:
             repo.dirstate.remove(f0)
         else:
             repo.dirstate.drop(f0)
 
     # re-add
     for f, args, msg in actions.get(ACTION_ADD, []):
         repo.dirstate.add(f)
 
     # re-add/mark as modified
     for f, args, msg in actions.get(ACTION_ADD_MODIFIED, []):
         if branchmerge:
             repo.dirstate.normallookup(f)
         else:
             repo.dirstate.add(f)
 
     # exec change
     for f, args, msg in actions.get(ACTION_EXEC, []):
         repo.dirstate.normallookup(f)
 
     # keep
     for f, args, msg in actions.get(ACTION_KEEP, []):
         pass
 
     # get
     for f, args, msg in actions.get(ACTION_GET, []):
         if branchmerge:
             repo.dirstate.otherparent(f)
         else:
             parentfiledata = getfiledata[f] if getfiledata else None
             repo.dirstate.normal(f, parentfiledata=parentfiledata)
 
     # merge
     for f, args, msg in actions.get(ACTION_MERGE, []):
         f1, f2, fa, move, anc = args
         if branchmerge:
             # We've done a branch merge, mark this file as merged
             # so that we properly record the merger later
             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(ACTION_DIR_RENAME_MOVE_LOCAL, []):
         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(ACTION_LOCAL_DIR_RENAME_GET, []):
         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, mergeforce=False,
            updatecheck=None, wc=None):
     """
     Perform a merge between the working directory and the given node
 
     node = the node to update to
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     matcher = a matcher to filter file lists (dirstate not updated)
     mergeancestor = whether it is merging with an ancestor. If true,
       we should accept the incoming changes for any prompts that occur.
       If false, merging with an ancestor (fast-forward) is only allowed
       between different named branches. This flag is used by rebase extension
       as a temporary fix and should be avoided in general.
     labels = labels to use for base, local and other
     mergeforce = whether the merge was run with 'merge --force' (deprecated): if
       this is True, then 'force' should be True as well.
 
     The table below shows all the behaviors of the update command given the
     -c/--check and -C/--clean or no options, whether the working directory is
     dirty, whether a revision is specified, and the relationship of the parent
     rev to the target rev (linear or not). Match from top first. The -n
     option doesn't exist on the command line, but represents the
     experimental.updatecheck=noconflict option.
 
     This logic is tested by test-update-branches.t.
 
     -c  -C  -n  -m  dirty  rev  linear  |  result
      y   y   *   *    *     *     *     |    (1)
      y   *   y   *    *     *     *     |    (1)
      y   *   *   y    *     *     *     |    (1)
      *   y   y   *    *     *     *     |    (1)
      *   y   *   y    *     *     *     |    (1)
      *   *   y   y    *     *     *     |    (1)
      *   *   *   *    *     n     n     |     x
      *   *   *   *    n     *     *     |    ok
      n   n   n   n    y     *     y     |   merge
      n   n   n   n    y     y     n     |    (2)
      n   n   n   y    y     *     *     |   merge
      n   n   y   n    y     *     *     |  merge if no conflict
      n   y   n   n    y     *     *     |  discard
      y   n   n   n    y     *     *     |    (3)
 
     x = can't happen
     * = don't-care
     1 = incompatible options (checked in commands.py)
     2 = abort: uncommitted changes (commit or update --clean to discard changes)
     3 = abort: uncommitted changes (checked in commands.py)
 
     The merge is performed inside ``wc``, a workingctx-like objects. It defaults
     to repo[None] if None is passed.
 
     Return the same tuple as applyupdates().
     """
     # Avoid cycle.
     from . import sparse
 
     # This function used to find the default destination if node was None, but
     # that's now in destutil.py.
     assert node is not None
     if not branchmerge and not force:
         # TODO: remove the default once all callers that pass branchmerge=False
         # and force=False pass a value for updatecheck. We may want to allow
         # updatecheck='abort' to better suppport some of these callers.
         if updatecheck is None:
             updatecheck = 'linear'
         assert updatecheck in ('none', 'linear', 'noconflict')
     # 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():
         if wc is None:
             wc = repo[None]
         pl = wc.parents()
         p1 = pl[0]
         p2 = repo[node]
         if ancestor is not None:
             pas = [repo[ancestor]]
         else:
             if repo.ui.configlist('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(), bytes(p1), bytes(p2)
 
         overwrite = force and not branchmerge
         ### 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"))
+                raise error.Abort(_("outstanding merge conflicts"),
+                                  hint=_("use 'hg resolve' to resolve"))
         if branchmerge:
             if pas == [p2]:
                 raise error.Abort(_("merging with a working directory ancestor"
                                    " has no effect"))
             elif pas == [p1]:
                 if not mergeancestor and wc.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"))
             if not wc.isinmemory():
                 for s in sorted(wc.substate):
                     wc.sub(s).bailifchanged()
 
         elif not overwrite:
             if p1 == p2: # no-op update
                 # call the hooks and exit early
                 repo.hook('preupdate', throw=True, parent1=xp2, parent2='')
                 repo.hook('update', parent1=xp2, parent2='', error=0)
                 return updateresult(0, 0, 0, 0)
 
             if (updatecheck == 'linear' and
                     pas not in ([p1], [p2])):  # nonlinear
                 dirty = wc.dirty(missing=True)
                 if dirty:
                     # Branching is a bit strange to ensure we do the minimal
                     # amount of call to obsutil.foreground.
                     foreground = obsutil.foreground(repo, [p1.node()])
                     # note: the <node> variable contains a random identifier
                     if repo[node].node() in foreground:
                         pass # allow updating to successors
                     else:
                         msg = _("uncommitted changes")
                         hint = _("commit or update --clean to discard changes")
                         raise error.UpdateAbort(msg, hint=hint)
                 else:
                     # Allow jumping branches if clean and specific rev given
                     pass
 
         if overwrite:
             pas = [wc]
         elif not branchmerge:
             pas = [p1]
 
         # deprecated config: merge.followcopies
         followcopies = repo.ui.configbool('merge', 'followcopies')
         if overwrite:
             followcopies = False
         elif not pas[0]:
             followcopies = False
         if not branchmerge and not wc.dirty(missing=True):
             followcopies = False
 
         ### calculate phase
         actionbyfile, diverge, renamedelete = calculateupdates(
             repo, wc, p2, pas, branchmerge, force, mergeancestor,
             followcopies, matcher=matcher, mergeforce=mergeforce)
 
         if updatecheck == 'noconflict':
             for f, (m, args, msg) in actionbyfile.iteritems():
                 if m not in (ACTION_GET, ACTION_KEEP, ACTION_EXEC,
                              ACTION_REMOVE, ACTION_PATH_CONFLICT_RESOLVE):
                     msg = _("conflicting changes")
                     hint = _("commit or update --clean to discard changes")
                     raise error.Abort(msg, hint=hint)
 
         # Prompt and create actions. Most of this is in the resolve phase
         # already, but we can't handle .hgsubstate in filemerge or
         # subrepoutil.submerge yet so we have to keep prompting for it.
         if '.hgsubstate' in actionbyfile:
             f = '.hgsubstate'
             m, args, msg = actionbyfile[f]
             prompts = filemerge.partextras(labels)
             prompts['f'] = f
             if m == ACTION_CHANGED_DELETED:
                 if repo.ui.promptchoice(
                     _("local%(l)s changed %(f)s which other%(o)s deleted\n"
                       "use (c)hanged version or (d)elete?"
                       "$$ &Changed $$ &Delete") % prompts, 0):
                     actionbyfile[f] = (ACTION_REMOVE, None, 'prompt delete')
                 elif f in p1:
                     actionbyfile[f] = (ACTION_ADD_MODIFIED, None, 'prompt keep')
                 else:
                     actionbyfile[f] = (ACTION_ADD, None, 'prompt keep')
             elif m == ACTION_DELETED_CHANGED:
                 f1, f2, fa, move, anc = args
                 flags = p2[f2].flags()
                 if repo.ui.promptchoice(
                     _("other%(o)s changed %(f)s which local%(l)s deleted\n"
                       "use (c)hanged version or leave (d)eleted?"
                       "$$ &Changed $$ &Deleted") % prompts, 0) == 0:
                     actionbyfile[f] = (ACTION_GET, (flags, False),
                                        'prompt recreating')
                 else:
                     del actionbyfile[f]
 
         # Convert to dictionary-of-lists format
         actions = emptyactions()
         for f, (m, args, msg) in actionbyfile.iteritems():
             if m not in actions:
                 actions[m] = []
             actions[m].append((f, args, msg))
 
         if not util.fscasesensitive(repo.path):
             # check collision between files only in p2 for clean update
             if (not branchmerge and
                 (force or not wc.dirty(missing=True, branch=False))):
                 _checkcollision(repo, p2.manifest(), None)
             else:
                 _checkcollision(repo, wc.manifest(), 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 sorted(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 sorted(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 and not wc.isinmemory():
             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())
 
         # Advertise fsmonitor when its presence could be useful.
         #
         # We only advertise when performing an update from an empty working
         # directory. This typically only occurs during initial clone.
         #
         # We give users a mechanism to disable the warning in case it is
         # annoying.
         #
         # We only allow on Linux and MacOS because that's where fsmonitor is
         # considered stable.
         fsmonitorwarning = repo.ui.configbool('fsmonitor', 'warn_when_unused')
         fsmonitorthreshold = repo.ui.configint('fsmonitor',
                                                'warn_update_file_count')
         try:
             # avoid cycle: extensions -> cmdutil -> merge
             from . import extensions
             extensions.find('fsmonitor')
             fsmonitorenabled = repo.ui.config('fsmonitor', 'mode') != 'off'
             # We intentionally don't look at whether fsmonitor has disabled
             # itself because a) fsmonitor may have already printed a warning
             # b) we only care about the config state here.
         except KeyError:
             fsmonitorenabled = False
 
         if (fsmonitorwarning
                 and not fsmonitorenabled
                 and p1.node() == nullid
                 and len(actions[ACTION_GET]) >= fsmonitorthreshold
                 and pycompat.sysplatform.startswith(('linux', 'darwin'))):
             repo.ui.warn(
                 _('(warning: large working directory being used without '
                   'fsmonitor enabled; enable fsmonitor to improve performance; '
                   'see "hg help -e fsmonitor")\n'))
 
         updatedirstate = not partial and not wc.isinmemory()
         wantfiledata = updatedirstate and not branchmerge
         stats, getfiledata = applyupdates(repo, actions, wc, p2, overwrite,
                                           wantfiledata, labels=labels)
 
         if updatedirstate:
             with repo.dirstate.parentchange():
                 repo.setparents(fp1, fp2)
                 recordupdates(repo, actions, branchmerge, getfiledata)
                 # update completed, clear state
                 util.unlink(repo.vfs.join('updatestate'))
 
                 if not branchmerge:
                     repo.dirstate.setbranch(p2.branch())
 
     # If we're updating to a location, clean up any stale temporary includes
     # (ex: this happens during hg rebase --abort).
     if not branchmerge:
         sparse.prunetemporaryincludes(repo)
 
     if not partial:
         repo.hook('update', parent1=xp1, parent2=xp2,
                   error=stats.unresolvedcount)
     return stats
 
 def graft(repo, ctx, pctx, labels=None, keepparent=False,
           keepconflictparent=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
     keepconflictparent - if unresolved, keep parent used for the merge
 
     """
     # If we're grafting a descendant onto an ancestor, be sure to pass
     # mergeancestor=True to update. This does two things: 1) allows the merge if
     # the destination is the same as the parent of the ctx (so we can use graft
     # to copy commits), and 2) informs update that the incoming changes are
     # newer than the destination so it doesn't prompt about "remote changed foo
     # which local deleted".
     mergeancestor = repo.changelog.isancestor(repo['.'].node(), ctx.node())
 
     stats = update(repo, ctx.node(), True, True, pctx.node(),
                    mergeancestor=mergeancestor, labels=labels)
 
 
     if keepconflictparent and stats.unresolvedcount:
         pother = ctx.node()
     else:
         pother = nullid
         parents = ctx.parents()
         if keepparent and len(parents) == 2 and pctx in parents:
             parents.remove(pctx)
             pother = parents[0].node()
 
     with repo.dirstate.parentchange():
         repo.setparents(repo['.'].node(), pother)
         repo.dirstate.write(repo.currenttransaction())
         # fix up dirstate for copies and renames
         copies.duplicatecopies(repo, repo[None], ctx.rev(), pctx.rev())
     return stats
 
 def purge(repo, matcher, ignored=False, removeemptydirs=True,
           removefiles=True, abortonerror=False, noop=False):
     """Purge the working directory of untracked files.
 
     ``matcher`` is a matcher configured to scan the working directory -
     potentially a subset.
 
     ``ignored`` controls whether ignored files should also be purged.
 
     ``removeemptydirs`` controls whether empty directories should be removed.
 
     ``removefiles`` controls whether files are removed.
 
     ``abortonerror`` causes an exception to be raised if an error occurs
     deleting a file or directory.
 
     ``noop`` controls whether to actually remove files. If not defined, actions
     will be taken.
 
     Returns an iterable of relative paths in the working directory that were
     or would be removed.
     """
 
     def remove(removefn, path):
         try:
             removefn(path)
         except OSError:
             m = _('%s cannot be removed') % path
             if abortonerror:
                 raise error.Abort(m)
             else:
                 repo.ui.warn(_('warning: %s\n') % m)
 
     # There's no API to copy a matcher. So mutate the passed matcher and
     # restore it when we're done.
     oldexplicitdir = matcher.explicitdir
     oldtraversedir = matcher.traversedir
 
     res = []
 
     try:
         if removeemptydirs:
             directories = []
             matcher.explicitdir = matcher.traversedir = directories.append
 
         status = repo.status(match=matcher, ignored=ignored, unknown=True)
 
         if removefiles:
             for f in sorted(status.unknown + status.ignored):
                 if not noop:
                     repo.ui.note(_('removing file %s\n') % f)
                     remove(repo.wvfs.unlink, f)
                 res.append(f)
 
         if removeemptydirs:
             for f in sorted(directories, reverse=True):
                 if matcher(f) and not repo.wvfs.listdir(f):
                     if not noop:
                         repo.ui.note(_('removing directory %s\n') % f)
                         remove(repo.wvfs.rmdir, f)
                     res.append(f)
 
         return res
 
     finally:
         matcher.explicitdir = oldexplicitdir
         matcher.traversedir = oldtraversedir

tests/test-rebase-inmemory.t

@@ -1,863 +1,864 b''
 #require symlink execbit
   $ cat << EOF >> $HGRCPATH
   > [phases]
   > publish=False
   > [extensions]
   > amend=
   > rebase=
   > debugdrawdag=$TESTDIR/drawdag.py
   > strip=
   > [rebase]
   > experimental.inmemory=1
   > [diff]
   > git=1
   > [alias]
   > tglog = log -G --template "{rev}: {node|short} '{desc}'\n"
   > EOF
 
 Rebase a simple DAG:
   $ hg init repo1
   $ cd repo1
   $ hg debugdrawdag <<'EOS'
   > c b
   > |/
   > d
   > |
   > a
   > EOS
   $ hg up -C a
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg tglog
   o  3: 814f6bd05178 'c'
   |
   | o  2: db0e82a16a62 'b'
   |/
   o  1: 02952614a83d 'd'
   |
   @  0: b173517d0057 'a'
   
   $ hg cat -r 3 c
   c (no-eol)
   $ hg cat -r 2 b
   b (no-eol)
   $ hg rebase --debug -r b -d c | grep rebasing
   rebasing in-memory
   rebasing 2:db0e82a16a62 "b" (b)
   $ hg tglog
   o  3: ca58782ad1e4 'b'
   |
   o  2: 814f6bd05178 'c'
   |
   o  1: 02952614a83d 'd'
   |
   @  0: b173517d0057 'a'
   
   $ hg cat -r 3 b
   b (no-eol)
   $ hg cat -r 2 c
   c (no-eol)
   $ cd ..
 
 Case 2:
   $ hg init repo2
   $ cd repo2
   $ hg debugdrawdag <<'EOS'
   > c b
   > |/
   > d
   > |
   > a
   > EOS
 
 Add a symlink and executable file:
   $ hg up -C c
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ ln -s somefile e
   $ echo f > f
   $ chmod +x f
   $ hg add e f
   $ hg amend -q
   $ hg up -Cq a
 
 Write files to the working copy, and ensure they're still there after the rebase
   $ echo "abc" > a
   $ ln -s def b
   $ echo "ghi" > c
   $ echo "jkl" > d
   $ echo "mno" > e
   $ hg tglog
   o  3: f56b71190a8f 'c'
   |
   | o  2: db0e82a16a62 'b'
   |/
   o  1: 02952614a83d 'd'
   |
   @  0: b173517d0057 'a'
   
   $ hg cat -r 3 c
   c (no-eol)
   $ hg cat -r 2 b
   b (no-eol)
   $ hg cat -r 3 e
   somefile (no-eol)
   $ hg rebase --debug -s b -d a | grep rebasing
   rebasing in-memory
   rebasing 2:db0e82a16a62 "b" (b)
   $ hg tglog
   o  3: fc055c3b4d33 'b'
   |
   | o  2: f56b71190a8f 'c'
   | |
   | o  1: 02952614a83d 'd'
   |/
   @  0: b173517d0057 'a'
   
   $ hg cat -r 2 c
   c (no-eol)
   $ hg cat -r 3 b
   b (no-eol)
   $ hg rebase --debug -s 1 -d 3 | grep rebasing
   rebasing in-memory
   rebasing 1:02952614a83d "d" (d)
   rebasing 2:f56b71190a8f "c"
   $ hg tglog
   o  3: 753feb6fd12a 'c'
   |
   o  2: 09c044d2cb43 'd'
   |
   o  1: fc055c3b4d33 'b'
   |
   @  0: b173517d0057 'a'
   
 Ensure working copy files are still there:
   $ cat a
   abc
   $ readlink.py b
   b -> def
   $ cat e
   mno
 
 Ensure symlink and executable files were rebased properly:
   $ hg up -Cq 3
   $ readlink.py e
   e -> somefile
   $ ls -l f | cut -c -10
   -rwxr-xr-x
 
 Rebase the working copy parent
   $ hg up -C 3
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg rebase -r 3 -d 0 --debug | grep rebasing
   rebasing in-memory
   rebasing 3:753feb6fd12a "c" (tip)
   $ hg tglog
   @  3: 844a7de3e617 'c'
   |
   | o  2: 09c044d2cb43 'd'
   | |
   | o  1: fc055c3b4d33 'b'
   |/
   o  0: b173517d0057 'a'
   
 
 Test reporting of path conflicts
 
   $ hg rm a
   $ mkdir a
   $ touch a/a
   $ hg ci -Am "a/a"
   adding a/a
   $ hg tglog
   @  4: daf7dfc139cb 'a/a'
   |
   o  3: 844a7de3e617 'c'
   |
   | o  2: 09c044d2cb43 'd'
   | |
   | o  1: fc055c3b4d33 'b'
   |/
   o  0: b173517d0057 'a'
   
   $ hg rebase -r . -d 2
   rebasing 4:daf7dfc139cb "a/a" (tip)
   saved backup bundle to $TESTTMP/repo2/.hg/strip-backup/daf7dfc139cb-fdbfcf4f-rebase.hg
 
   $ hg tglog
   @  4: c6ad37a4f250 'a/a'
   |
   | o  3: 844a7de3e617 'c'
   | |
   o |  2: 09c044d2cb43 'd'
   | |
   o |  1: fc055c3b4d33 'b'
   |/
   o  0: b173517d0057 'a'
   
   $ echo foo > foo
   $ hg ci -Aqm "added foo"
   $ hg up '.^'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo bar > bar
   $ hg ci -Aqm "added bar"
   $ hg rm a/a
   $ echo a > a
   $ hg ci -Aqm "added a back!"
   $ hg tglog
   @  7: 855e9797387e 'added a back!'
   |
   o  6: d14530e5e3e6 'added bar'
   |
   | o  5: 9b94b9373deb 'added foo'
   |/
   o  4: c6ad37a4f250 'a/a'
   |
   | o  3: 844a7de3e617 'c'
   | |
   o |  2: 09c044d2cb43 'd'
   | |
   o |  1: fc055c3b4d33 'b'
   |/
   o  0: b173517d0057 'a'
   
   $ hg rebase -r . -d 5
   rebasing 7:855e9797387e "added a back!" (tip)
   saved backup bundle to $TESTTMP/repo2/.hg/strip-backup/855e9797387e-81ee4c5d-rebase.hg
 
   $ hg tglog
   @  7: bb3f02be2688 'added a back!'
   |
   | o  6: d14530e5e3e6 'added bar'
   | |
   o |  5: 9b94b9373deb 'added foo'
   |/
   o  4: c6ad37a4f250 'a/a'
   |
   | o  3: 844a7de3e617 'c'
   | |
   o |  2: 09c044d2cb43 'd'
   | |
   o |  1: fc055c3b4d33 'b'
   |/
   o  0: b173517d0057 'a'
   
   $ mkdir -p c/subdir
   $ echo c > c/subdir/file.txt
   $ hg add c/subdir/file.txt
   $ hg ci -m 'c/subdir/file.txt'
   $ hg rebase -r . -d 3 -n
   starting dry-run rebase; repository will not be changed
   rebasing 8:e147e6e3c490 "c/subdir/file.txt" (tip)
   abort: error: 'c/subdir/file.txt' conflicts with file 'c' in 3.
   [255]
   $ hg rebase -r 3 -d . -n
   starting dry-run rebase; repository will not be changed
   rebasing 3:844a7de3e617 "c"
   abort: error: file 'c' cannot be written because  'c/' is a directory in e147e6e3c490 (containing 1 entries: c/subdir/file.txt)
   [255]
 
   $ cd ..
 
 Test path auditing (issue5818)
 
   $ mkdir lib_
   $ ln -s lib_ lib
   $ hg init repo
   $ cd repo
   $ mkdir -p ".$TESTTMP/lib"
   $ touch ".$TESTTMP/lib/a"
   $ hg add ".$TESTTMP/lib/a"
   $ hg ci -m 'a'
 
   $ touch ".$TESTTMP/lib/b"
   $ hg add ".$TESTTMP/lib/b"
   $ hg ci -m 'b'
 
   $ hg up -q '.^'
   $ touch ".$TESTTMP/lib/c"
   $ hg add ".$TESTTMP/lib/c"
   $ hg ci -m 'c'
   created new head
   $ hg rebase -s 1 -d .
   rebasing 1:* "b" (glob)
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-rebase.hg (glob)
   $ cd ..
 
 Test dry-run rebasing
 
   $ hg init repo3
   $ cd repo3
   $ echo a>a
   $ hg ci -Aqma
   $ echo b>b
   $ hg ci -Aqmb
   $ echo c>c
   $ hg ci -Aqmc
   $ echo d>d
   $ hg ci -Aqmd
   $ echo e>e
   $ hg ci -Aqme
 
   $ hg up 1 -q
   $ echo f>f
   $ hg ci -Amf
   adding f
   created new head
   $ echo g>g
   $ hg ci -Aqmg
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
 Make sure it throws error while passing --continue or --abort with --dry-run
   $ hg rebase -s 2 -d 6 -n --continue
   abort: cannot specify both --dry-run and --continue
   [255]
   $ hg rebase -s 2 -d 6 -n --abort
   abort: cannot specify both --dry-run and --abort
   [255]
 
 Check dryrun gives correct results when there is no conflict in rebasing
   $ hg rebase -s 2 -d 6 -n
   starting dry-run rebase; repository will not be changed
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   dry-run rebase completed successfully; run without -n/--dry-run to perform this rebase
 
   $ hg diff
   $ hg status
 
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
 Check dryrun working with --collapse when there is no conflict
   $ hg rebase -s 2 -d 6 -n --collapse
   starting dry-run rebase; repository will not be changed
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   dry-run rebase completed successfully; run without -n/--dry-run to perform this rebase
 
 Check dryrun gives correct results when there is conflict in rebasing
 Make a conflict:
   $ hg up 6 -q
   $ echo conflict>e
   $ hg ci -Aqm "conflict with e"
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  7:d2c195b28050 test
   |  conflict with e
   |
   o  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
   $ hg rebase -s 2 -d 7 -n
   starting dry-run rebase; repository will not be changed
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   merging e
   transaction abort!
   rollback completed
   hit a merge conflict
   [1]
   $ hg diff
   $ hg status
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  7:d2c195b28050 test
   |  conflict with e
   |
   o  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
 Check dryrun working with --collapse when there is conflicts
   $ hg rebase -s 2 -d 7 -n --collapse
   starting dry-run rebase; repository will not be changed
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   merging e
   hit a merge conflict
   [1]
 
 In-memory rebase that fails due to merge conflicts
 
   $ hg rebase -s 2 -d 7
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   merging e
   transaction abort!
   rollback completed
   hit merge conflicts; re-running rebase without in-memory merge
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   merging e
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
   $ hg rebase --abort
   saved backup bundle to $TESTTMP/repo3/.hg/strip-backup/c1e524d4287c-f91f82e1-backup.hg
   rebase aborted
 
 Retrying without in-memory merge won't lose working copy changes
   $ cd ..
   $ hg clone repo3 repo3-dirty -q
   $ cd repo3-dirty
   $ echo dirty > a
   $ hg rebase -s 2 -d 7
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   merging e
   transaction abort!
   rollback completed
   hit merge conflicts; re-running rebase without in-memory merge
   abort: uncommitted changes
   [255]
   $ cat a
   dirty
 
 Retrying without in-memory merge won't lose merge state
   $ cd ..
   $ hg clone repo3 repo3-merge-state -q
   $ cd repo3-merge-state
   $ hg merge 4
   merging e
   warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
   2 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg resolve -l
   U e
   $ hg rebase -s 2 -d 7
   rebasing 2:177f92b77385 "c"
   abort: outstanding merge conflicts
+  (use 'hg resolve' to resolve)
   [255]
   $ hg resolve -l
   U e
 
 ==========================
 Test for --confirm option|
 ==========================
   $ cd ..
   $ hg clone repo3 repo4 -q
   $ cd repo4
   $ hg strip 7 -q
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
 Check it gives error when both --dryrun and --confirm is used:
   $ hg rebase -s 2 -d . --confirm --dry-run
   abort: cannot specify both --confirm and --dry-run
   [255]
   $ hg rebase -s 2 -d . --confirm --abort
   abort: cannot specify both --confirm and --abort
   [255]
   $ hg rebase -s 2 -d . --confirm --continue
   abort: cannot specify both --confirm and --continue
   [255]
 
 Test --confirm option when there are no conflicts:
   $ hg rebase -s 2 -d . --keep --config ui.interactive=True --confirm << EOF
   > n
   > EOF
   starting in-memory rebase
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   rebase completed successfully
   apply changes (yn)? n
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
   $ hg rebase -s 2 -d . --keep --config ui.interactive=True --confirm << EOF
   > y
   > EOF
   starting in-memory rebase
   rebasing 2:177f92b77385 "c"
   rebasing 3:055a42cdd887 "d"
   rebasing 4:e860deea161a "e"
   rebase completed successfully
   apply changes (yn)? y
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   o  9:9fd28f55f6dc test
   |  e
   |
   o  8:12cbf031f469 test
   |  d
   |
   o  7:c83b1da5b1ae test
   |  c
   |
   @  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
 Test --confirm option when there is a conflict
   $ hg up tip -q
   $ echo ee>e
   $ hg ci --amend -m "conflict with e" -q
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  9:906d72f66a59 test
   |  conflict with e
   |
   o  8:12cbf031f469 test
   |  d
   |
   o  7:c83b1da5b1ae test
   |  c
   |
   o  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
   $ hg rebase -s 4 -d . --keep --confirm
   starting in-memory rebase
   rebasing 4:e860deea161a "e"
   merging e
   hit a merge conflict
   [1]
   $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
   @  9:906d72f66a59 test
   |  conflict with e
   |
   o  8:12cbf031f469 test
   |  d
   |
   o  7:c83b1da5b1ae test
   |  c
   |
   o  6:baf10c5166d4 test
   |  g
   |
   o  5:6343ca3eff20 test
   |  f
   |
   | o  4:e860deea161a test
   | |  e
   | |
   | o  3:055a42cdd887 test
   | |  d
   | |
   | o  2:177f92b77385 test
   |/   c
   |
   o  1:d2ae7f538514 test
   |  b
   |
   o  0:cb9a9f314b8b test
      a
   
 Test a metadata-only in-memory merge
   $ cd $TESTTMP
   $ hg init no_exception
   $ cd no_exception
 # Produce the following graph:
 #   o  'add +x to foo.txt'
 #   | o  r1  (adds bar.txt, just for something to rebase to)
 #   |/
 #   o  r0   (adds foo.txt, no +x)
   $ echo hi > foo.txt
   $ hg ci -qAm r0
   $ echo hi > bar.txt
   $ hg ci -qAm r1
   $ hg co -qr ".^"
   $ chmod +x foo.txt
   $ hg ci -qAm 'add +x to foo.txt'
 issue5960: this was raising an AttributeError exception
   $ hg rebase -r . -d 1
   rebasing 2:539b93e77479 "add +x to foo.txt" (tip)
   saved backup bundle to $TESTTMP/no_exception/.hg/strip-backup/*.hg (glob)
   $ hg diff -c tip
   diff --git a/foo.txt b/foo.txt
   old mode 100644
   new mode 100755
 
 Test rebasing a commit with copy information, but no content changes
 
   $ cd ..
   $ hg clone -q repo1 merge-and-rename
   $ cd merge-and-rename
   $ cat << EOF >> .hg/hgrc
   > [experimental]
   > evolution.createmarkers=True
   > evolution.allowunstable=True
   > EOF
   $ hg co -q 1
   $ hg mv d e
   $ hg ci -qm 'rename d to e'
   $ hg co -q 3
   $ hg merge -q 4
   $ hg ci -m 'merge'
   $ hg co -q 2
   $ mv d e
   $ hg addremove -qs 0
   $ hg ci -qm 'untracked rename of d to e'
   $ hg debugobsolete -q `hg log -T '{node}' -r 4` `hg log -T '{node}' -r .`
   1 new orphan changesets
   $ hg tglog
   @  6: 676538af172d 'untracked rename of d to e'
   |
   | *    5: 574d92ad16fc 'merge'
   | |\
   | | x  4: 2c8b5dad7956 'rename d to e'
   | | |
   | o |  3: ca58782ad1e4 'b'
   |/ /
   o /  2: 814f6bd05178 'c'
   |/
   o  1: 02952614a83d 'd'
   |
   o  0: b173517d0057 'a'
   
   $ hg rebase -b 5 -d tip
   rebasing 3:ca58782ad1e4 "b"
   rebasing 5:574d92ad16fc "merge"
   note: not rebasing 5:574d92ad16fc "merge", its destination already has all its changes
 
   $ cd ..
 
 Test rebasing a commit with copy information
 
   $ hg init rebase-rename
   $ cd rebase-rename
   $ echo a > a
   $ hg ci -Aqm 'add a'
   $ echo a2 > a
   $ hg ci -m 'modify a'
   $ hg co -q 0
   $ hg mv a b
   $ hg ci -qm 'rename a to b'
   $ hg rebase -d 1
   rebasing 2:b977edf6f839 "rename a to b" (tip)
   merging a and b to b
   saved backup bundle to $TESTTMP/rebase-rename/.hg/strip-backup/b977edf6f839-0864f570-rebase.hg
   $ hg st --copies --change .
   A b
     a
   R a
   $ cd ..
 
 Test rebasing a commit with copy information, where the target is empty
 
   $ hg init rebase-rename-empty
   $ cd rebase-rename-empty
   $ echo a > a
   $ hg ci -Aqm 'add a'
   $ cat > a
   $ hg ci -m 'make a empty'
   $ hg co -q 0
   $ hg mv a b
   $ hg ci -qm 'rename a to b'
   $ hg rebase -d 1
   rebasing 2:b977edf6f839 "rename a to b" (tip)
   merging a and b to b
   saved backup bundle to $TESTTMP/rebase-rename-empty/.hg/strip-backup/b977edf6f839-0864f570-rebase.hg
   $ hg st --copies --change .
   A b
     a
   R a
   $ cd ..
 Rebase across a copy with --collapse
 
   $ hg init rebase-rename-collapse
   $ cd rebase-rename-collapse
   $ echo a > a
   $ hg ci -Aqm 'add a'
   $ hg mv a b
   $ hg ci -m 'rename a to b'
   $ hg co -q 0
   $ echo a2 > a
   $ hg ci -qm 'modify a'
   $ hg rebase -r . -d 1 --collapse
   rebasing 2:41c4ea50d4cf "modify a" (tip)
   merging b and a to b
   saved backup bundle to $TESTTMP/rebase-rename-collapse/.hg/strip-backup/41c4ea50d4cf-b90b7994-rebase.hg
   $ cd ..
 
 Test rebasing when the file we are merging in destination is empty
 
   $ hg init test
   $ cd test
   $ echo a > foo
   $ hg ci -Aqm 'added a to foo'
 
   $ rm foo
   $ touch foo
   $ hg di
   diff --git a/foo b/foo
   --- a/foo
   +++ b/foo
   @@ -1,1 +0,0 @@
   -a
 
   $ hg ci -m "make foo an empty file"
 
   $ hg up '.^'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo b > foo
   $ hg di
   diff --git a/foo b/foo
   --- a/foo
   +++ b/foo
   @@ -1,1 +1,1 @@
   -a
   +b
   $ hg ci -m "add b to foo"
   created new head
 
   $ hg rebase -r . -d 1 --config ui.merge=internal:merge3
   rebasing 2:fb62b706688e "add b to foo" (tip)
   merging foo
   hit merge conflicts; re-running rebase without in-memory merge
   rebasing 2:fb62b706688e "add b to foo" (tip)
   merging foo
   warning: conflicts while merging foo! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]

tests/test-resolve.t

@@ -1,800 +1,803 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 merge --abort' 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
 
 tell users how they could have used resolve
 
   $ mkdir nested
   $ cd nested
   $ hg resolve -m file1
   arguments do not match paths that need resolving
   (try: hg resolve -m path:file1)
   $ hg resolve -m file1 filez
   arguments do not match paths that need resolving
   (try: hg resolve -m path:file1 path:filez)
   $ hg resolve -m path:file1 path:filez
   $ hg resolve -l
   R file1
   U file2
   $ hg resolve -l --config ui.relative-paths=yes
   R ../file1
   U ../file2
   $ hg resolve --re-merge filez file2
   arguments do not match paths that need resolving
   (try: hg resolve --re-merge path:filez path:file2)
   $ hg resolve -m filez file2
   arguments do not match paths that need resolving
   (try: hg resolve -m path:filez path:file2)
   $ hg resolve -m path:filez path:file2
   (no more unresolved files)
   $ hg resolve -l
   R file1
   R file2
 
 cleanup
   $ hg resolve -u
   $ cd ..
   $ rmdir nested
 
 don't allow marking or unmarking driver-resolved files
 
   $ cat > $TESTTMP/markdriver.py << EOF
   > '''mark and unmark files as driver-resolved'''
   > from mercurial import (
   >    merge,
   >    pycompat,
   >    registrar,
   >    scmutil,
   > )
   > cmdtable = {}
   > command = registrar.command(cmdtable)
   > @command(b'markdriver',
   >   [(b'u', b'unmark', None, b'')],
   >   b'FILE...')
   > def markdriver(ui, repo, *pats, **opts):
   >     wlock = repo.wlock()
   >     opts = pycompat.byteskwargs(opts)
   >     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[b'unmark']:
   >                 ms.mark(f, b'd')
   >             else:
   >                 ms.mark(f, b'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
   [
    {
     "mergestatus": "R",
     "path": "file1"
    },
    {
     "mergestatus": "U",
     "path": "file2"
    }
   ]
 
   $ hg resolve -l -T '{path} {mergestatus} {status} {p1rev} {p2rev}\n'
   file1 R M 2 1
   file2 U M 2 1
 
 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
+  (use 'hg resolve' to resolve)
   [255]
   $ hg merge 2
   abort: outstanding merge conflicts
+  (use 'hg resolve' to resolve)
   [255]
   $ hg merge --force 2
   abort: outstanding merge conflicts
+  (use 'hg resolve' to resolve)
   [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 merge --abort' 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
   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
   file2
   $ 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:
   >>>
   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
   labels:
     local: working copy
     other: merge rev
   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
   labels:
     local: working copy
     other: merge rev
   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
   warning: merge state has unsupported record types: X
   parent: 2:57653b9f834a 
    append baz to files
   parent: 1:dc77451844e3 
    append bar to files
   branch: default
   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
 
 resolve -m can be configured to look for remaining conflict markers
   $ hg up -qC 2
   $ hg merge -q --tool=internal:merge 1
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging file2! (edit, then use 'hg resolve --mark')
   [1]
   $ hg resolve -l
   U file1
   U file2
   $ echo 'remove markers' > file1
   $ hg --config commands.resolve.mark-check=abort resolve -m
   warning: the following files still have conflict markers:
     file2
   abort: conflict markers detected
   (use --all to mark anyway)
   [255]
   $ hg resolve -l
   U file1
   U file2
 Try with --all from the hint
   $ hg --config commands.resolve.mark-check=abort resolve -m --all
   warning: the following files still have conflict markers:
     file2
   (no more unresolved files)
   $ hg resolve -l
   R file1
   R file2
 Test option value 'warn'
   $ hg resolve --unmark
   $ hg resolve -l
   U file1
   U file2
   $ hg --config commands.resolve.mark-check=warn resolve -m
   warning: the following files still have conflict markers:
     file2
   (no more unresolved files)
   $ hg resolve -l
   R file1
   R file2
 If the file is already marked as resolved, we don't warn about it
   $ hg resolve --unmark file1
   $ hg resolve -l
   U file1
   R file2
   $ hg --config commands.resolve.mark-check=warn resolve -m
   (no more unresolved files)
   $ hg resolve -l
   R file1
   R file2
 If the user passes an invalid value, we treat it as 'none'.
   $ hg resolve --unmark
   $ hg resolve -l
   U file1
   U file2
   $ hg --config commands.resolve.mark-check=nope resolve -m
   (no more unresolved files)
   $ hg resolve -l
   R file1
   R file2
 Test explicitly setting the option to 'none'
   $ hg resolve --unmark
   $ hg resolve -l
   U file1
   U file2
   $ hg --config commands.resolve.mark-check=none resolve -m
   (no more unresolved files)
   $ hg resolve -l
   R file1
   R file2
 Test with marking an explicit file as resolved, this should not abort (since
 there's no --force flag, we have no way of combining --all with a filename)
   $ hg resolve --unmark
   $ hg resolve -l
   U file1
   U file2
 (This downgrades to a warning since an explicit file was specified).
   $ hg --config commands.resolve.mark-check=abort resolve -m file2
   warning: the following files still have conflict markers:
     file2
   $ hg resolve -l
   U file1
   R file2
 Testing the --re-merge flag
   $ hg resolve --unmark file1
   $ hg resolve -l
   U file1
   R file2
   $ hg resolve --mark --re-merge
   abort: too many actions specified
   [255]
   $ hg resolve --re-merge --all
   merging file1
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   [1]
 Explicit re-merge
   $ hg resolve --unmark file1
   $ hg resolve --config commands.resolve.explicit-re-merge=1 --all
   abort: no action specified
   (use --mark, --unmark, --list or --re-merge)
   [255]
   $ hg resolve --config commands.resolve.explicit-re-merge=1 --re-merge --all
   merging file1
   warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
   [1]
 
   $ cd ..
 
 ======================================================
 Test 'hg resolve' confirm config option functionality |
 ======================================================
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > rebase=
   > EOF
 
   $ hg init repo2
   $ cd repo2
 
   $ echo boss > boss
   $ hg ci -Am "add boss"
   adding boss
 
   $ for emp in emp1 emp2 emp3; do echo work > $emp; done;
   $ hg ci -Aqm "added emp1 emp2 emp3"
 
   $ hg up 0
   0 files updated, 0 files merged, 3 files removed, 0 files unresolved
 
   $ for emp in emp1 emp2 emp3; do echo nowork > $emp; done;
   $ hg ci -Aqm "added lazy emp1 emp2 emp3"
 
   $ hg log -GT "{rev} {node|short} {firstline(desc)}\n"
   @  2 0acfd4a49af0 added lazy emp1 emp2 emp3
   |
   | o  1 f30f98a8181f added emp1 emp2 emp3
   |/
   o  0 88660038d466 add boss
   
   $ hg rebase -s 1 -d 2
   rebasing 1:f30f98a8181f "added emp1 emp2 emp3"
   merging emp1
   merging emp2
   merging emp3
   warning: conflicts while merging emp1! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging emp2! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging emp3! (edit, then use 'hg resolve --mark')
   unresolved conflicts (see hg resolve, then hg rebase --continue)
   [1]
 
 Test when commands.resolve.confirm config option is not set:
 ===========================================================
   $ hg resolve --all
   merging emp1
   merging emp2
   merging emp3
   warning: conflicts while merging emp1! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging emp2! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging emp3! (edit, then use 'hg resolve --mark')
   [1]
 
 Test when config option is set:
 ==============================
   $ cat >> .hg/hgrc << EOF
   > [ui]
   > interactive = True
   > [commands]
   > resolve.confirm = True
   > EOF
 
   $ hg resolve
   abort: no files or directories specified
   (use --all to re-merge all unresolved files)
   [255]
   $ hg resolve --all << EOF
   > n
   > EOF
   re-merge all unresolved files (yn)? n
   abort: user quit
   [255]
 
   $ hg resolve --all << EOF
   > y
   > EOF
   re-merge all unresolved files (yn)? y
   merging emp1
   merging emp2
   merging emp3
   warning: conflicts while merging emp1! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging emp2! (edit, then use 'hg resolve --mark')
   warning: conflicts while merging emp3! (edit, then use 'hg resolve --mark')
   [1]
 
 Test that commands.resolve.confirm respect --mark option (only when no patterns args are given):
 ===============================================================================================
 
   $ hg resolve -m emp1
   $ hg resolve -l
   R emp1
   U emp2
   U emp3
 
   $ hg resolve -m << EOF
   > n
   > EOF
   mark all unresolved files as resolved (yn)? n
   abort: user quit
   [255]
 
   $ hg resolve -m << EOF
   > y
   > EOF
   mark all unresolved files as resolved (yn)? y
   (no more unresolved files)
   continue: hg rebase --continue
   $ hg resolve -l
   R emp1
   R emp2
   R emp3
 
 Test that commands.resolve.confirm respect --unmark option (only when no patterns args are given):
 =================================================================================================
 
   $ hg resolve -u emp1
 
   $ hg resolve -l
   U emp1
   R emp2
   R emp3
 
   $ hg resolve -u << EOF
   > n
   > EOF
   mark all resolved files as unresolved (yn)? n
   abort: user quit
   [255]
 
   $ hg resolve -m << EOF
   > y
   > EOF
   mark all unresolved files as resolved (yn)? y
   (no more unresolved files)
   continue: hg rebase --continue
 
   $ hg resolve -l
   R emp1
   R emp2
   R emp3
 
   $ hg rebase --abort
   rebase aborted
 
 Done with commands.resolve.confirm tests:
   $ cd ..
 
 Test that commands.resolve.mark-check works even if there are deleted files:
   $ hg init resolve-deleted
   $ cd resolve-deleted
   $ echo r0 > file1
   $ hg ci -qAm r0
   $ echo r1 > file1
   $ hg ci -qm r1
   $ hg co -qr 0
   $ hg rm file1
   $ hg ci -qm "r2 (delete file1)"
 
 (At this point we have r0 creating file1, and sibling commits r1 and r2, which
  modify and delete file1, respectively)
 
   $ hg merge -r 1
   file 'file1' was deleted in local [working copy] but was modified in other [merge rev].
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg resolve --list
   U file1
 Because we left it as 'unresolved' the file should still exist.
   $ [ -f file1 ] || echo "File does not exist?"
 BC behavior: `hg resolve --mark` accepts that the file is still there, and
 doesn't have a problem with this situation.
   $ hg resolve --mark --config commands.resolve.mark-check=abort
   (no more unresolved files)
   $ hg resolve --list
   R file1
 The file is still there:
   $ [ -f file1 ] || echo "File does not exist?"
 Let's check mark-check=warn:
   $ hg resolve --unmark file1
   $ hg resolve --mark --config commands.resolve.mark-check=warn
   (no more unresolved files)
   $ hg resolve --list
   R file1
 The file is still there:
   $ [ -f file1 ] || echo "File does not exist?"
 Let's resolve the issue by deleting the file via `hg resolve`
   $ hg resolve --unmark file1
   $ echo 'd' | hg resolve file1 --config ui.interactive=1
   file 'file1' was deleted in local [working copy] but was modified in other [merge rev].
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? d
   (no more unresolved files)
   $ hg resolve --list
   R file1
 The file is deleted:
   $ [ -f file1 ] && echo "File still exists?" || true
 Doing `hg resolve --mark` doesn't break now that the file is missing:
   $ hg resolve --mark --config commands.resolve.mark-check=abort
   (no more unresolved files)
   $ hg resolve --mark --config commands.resolve.mark-check=warn
   (no more unresolved files)
 Resurrect the file, and delete it outside of hg:
   $ hg resolve --unmark file1
   $ hg resolve file1
   file 'file1' was deleted in local [working copy] but was modified in other [merge rev].
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? u
   [1]
   $ [ -f file1 ] || echo "File does not exist?"
   $ hg resolve --list
   U file1
   $ rm file1
   $ hg resolve --mark --config commands.resolve.mark-check=abort
   (no more unresolved files)
   $ hg resolve --list
   R file1
   $ hg resolve --unmark file1
   $ hg resolve file1
   file 'file1' was deleted in local [working copy] but was modified in other [merge rev].
   You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
   What do you want to do? u
   [1]
   $ [ -f file1 ] || echo "File does not exist?"
   $ hg resolve --list
   U file1
   $ rm file1
   $ hg resolve --mark --config commands.resolve.mark-check=warn
   (no more unresolved files)
   $ hg resolve --list
   R file1
 
 
 For completeness, let's try that in the opposite direction (merging r2 into r1,
 instead of r1 into r2):
   $ hg update -qCr 1
   $ hg merge -r 2
   file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
   You can use (c)hanged version, (d)elete, or leave (u)nresolved.
   What do you want to do? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ hg resolve --list
   U file1
 Because we left it as 'unresolved' the file should still exist.
   $ [ -f file1 ] || echo "File does not exist?"
 BC behavior: `hg resolve --mark` accepts that the file is still there, and
 doesn't have a problem with this situation.
   $ hg resolve --mark --config commands.resolve.mark-check=abort
   (no more unresolved files)
   $ hg resolve --list
   R file1
 The file is still there:
   $ [ -f file1 ] || echo "File does not exist?"
 Let's check mark-check=warn:
   $ hg resolve --unmark file1
   $ hg resolve --mark --config commands.resolve.mark-check=warn
   (no more unresolved files)
   $ hg resolve --list
   R file1
 The file is still there:
   $ [ -f file1 ] || echo "File does not exist?"
 Let's resolve the issue by deleting the file via `hg resolve`
   $ hg resolve --unmark file1
   $ echo 'd' | hg resolve file1 --config ui.interactive=1
   file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
   You can use (c)hanged version, (d)elete, or leave (u)nresolved.
   What do you want to do? d
   (no more unresolved files)
   $ hg resolve --list
   R file1
 The file is deleted:
   $ [ -f file1 ] && echo "File still exists?" || true
 Doing `hg resolve --mark` doesn't break now that the file is missing:
   $ hg resolve --mark --config commands.resolve.mark-check=abort
   (no more unresolved files)
   $ hg resolve --mark --config commands.resolve.mark-check=warn
   (no more unresolved files)
 Resurrect the file, and delete it outside of hg:
   $ hg resolve --unmark file1
   $ hg resolve file1
   file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
   You can use (c)hanged version, (d)elete, or leave (u)nresolved.
   What do you want to do? u
   [1]
   $ [ -f file1 ] || echo "File does not exist?"
   $ hg resolve --list
   U file1
   $ rm file1
   $ hg resolve --mark --config commands.resolve.mark-check=abort
   (no more unresolved files)
   $ hg resolve --list
   R file1
   $ hg resolve --unmark file1
   $ hg resolve file1
   file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
   You can use (c)hanged version, (d)elete, or leave (u)nresolved.
   What do you want to do? u
   [1]
   $ [ -f file1 ] || echo "File does not exist?"
   $ hg resolve --list
   U file1
   $ rm file1
   $ hg resolve --mark --config commands.resolve.mark-check=warn
   (no more unresolved files)
   $ hg resolve --list
   R file1
 
   $ cd ..