merge: change priority / ordering of merge actions

The ordering of actions matters. Normal file system semantics is that files
have to be removed before a directory with the same name can be created.

Before the first ordering key was to have 'r' and 'f' actions come first,
secondary key was the filename.

Because of future refactorings we want to consistently have all action types
(with a sensible priority) as separate first keys. Grouped by action type, we
sort by filename.

Not processing in strict filename order could give worse performance,
especially on spinning disks. That is however primarily an issue in the cases
where "all" actions are of the same kind and will be grouped together anyway.

mercurial/merge.py

@@ -1,1109 +1,1112 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.
 
 import struct
 
 from node import nullid, nullrev, hex, bin
 from i18n import _
 from mercurial import obsolete
 import error, util, filemerge, copies, subrepo, worker, dicthelpers
 import errno, os, shutil
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 def _droponode(data):
     # used for compatibility for v1
     bits = data.split("\0")
     bits = bits[:-2] + bits[-1:]
     return "\0".join(bits)
 
 class mergestate(object):
     '''track 3-way merge state of individual files
 
     it is stored on disk when needed. Two file are used, one with an old
     format, one with a new format. Both contains similar data, but the new
     format can store new kind of field.
 
     Current new format is a list of arbitrary record of the form:
 
         [type][length][content]
 
     Type is a single character, length is a 4 bytes integer, content is an
     arbitrary suites of bytes of length `length`.
 
     Type should be a letter. Capital letter are mandatory record, Mercurial
     should abort if they are unknown. lower case record can be safely ignored.
 
     Currently known record:
 
     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
     '''
     statepathv1 = "merge/state"
     statepathv2 = "merge/state2"
 
     def __init__(self, repo):
         self._repo = repo
         self._dirty = False
         self._read()
 
     def reset(self, node=None, other=None):
         self._state = {}
         self._local = None
         self._other = None
         if node:
             self._local = node
             self._other = other
         shutil.rmtree(self._repo.join("merge"), True)
         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._local = None
         self._other = None
         records = self._readrecords()
         for rtype, record in records:
             if rtype == 'L':
                 self._local = bin(record)
             elif rtype == 'O':
                 self._other = bin(record)
             elif rtype == "F":
                 bits = record.split("\0")
                 self._state[bits[0]] = bits[1:]
             elif not rtype.islower():
                 raise util.Abort(_('unsupported merge state record: %s')
                                    % rtype)
         self._dirty = False
 
     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()
         oldv2 = set() # old format version of v2 record
         for rec in v2records:
             if rec[0] == 'L':
                 oldv2.add(rec)
             elif rec[0] == 'F':
                 # drop the onode data (not contained in v1)
                 oldv2.add(('F', _droponode(rec[1])))
         for rec in v1records:
             if rec not in oldv2:
                 # v1 file is newer than v2 file, use it
                 # we have to infer the "other" changeset of the merge
                 # we cannot do better than that with v1 of the format
                 mctx = self._repo[None].parents()[-1]
                 v1records.append(('O', mctx.hex()))
                 # add place holder "other" file node information
                 # nobody is using it yet so we do no need to fetch the data
                 # if mctx was wrong `mctx[bits[-2]]` may fails.
                 for idx, r in enumerate(v1records):
                     if r[0] == 'F':
                         bits = r[1].split("\0")
                         bits.insert(-2, '')
                         v1records[idx] = (r[0], "\0".join(bits))
                 return v1records
         else:
             return v2records
 
     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.opener(self.statepathv1)
             for i, l in enumerate(f):
                 if i == 0:
                     records.append(('L', l[:-1]))
                 else:
                     records.append(('F', l[:-1]))
             f.close()
         except IOError, err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def _readrecordsv2(self):
         """read on disk merge state for version 2 file
 
         returns list of record [(TYPE, data), ...]
         """
         records = []
         try:
             f = self._repo.opener(self.statepathv2)
             data = f.read()
             off = 0
             end = len(data)
             while off < end:
                 rtype = data[off]
                 off += 1
                 length = _unpack('>I', data[off:(off + 4)])[0]
                 off += 4
                 record = data[off:(off + length)]
                 off += length
                 records.append((rtype, record))
             f.close()
         except IOError, err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     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.opener.exists(self.statepathv1) or \
                self._repo.opener.exists(self.statepathv2)
 
     def commit(self):
         """Write current state on disk (if necessary)"""
         if self._dirty:
             records = []
             records.append(("L", hex(self._local)))
             records.append(("O", hex(self._other)))
             for d, v in self._state.iteritems():
                 records.append(("F", "\0".join([d] + v)))
             self._writerecords(records)
             self._dirty = False
 
     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.opener(self.statepathv1, "w")
         irecords = iter(records)
         lrecords = irecords.next()
         assert lrecords[0] == 'L'
         f.write(hex(self._local) + "\n")
         for rtype, data in irecords:
             if rtype == "F":
                 f.write("%s\n" % _droponode(data))
         f.close()
 
     def _writerecordsv2(self, records):
         """Write current state on disk in a version 2 file"""
         f = self._repo.opener(self.statepathv2, "w")
         for key, data in records:
             assert len(key) == 1
             format = ">sI%is" % len(data)
             f.write(_pack(format, key, len(data), data))
         f.close()
 
     def add(self, fcl, fco, fca, fd):
         """add a new (potentially?) conflicting file the merge state
         fcl: file context for local,
         fco: file context for remote,
         fca: file context for ancestors,
         fd:  file path of the resulting merge.
 
         note: also write the local version to the `.hg/merge` directory.
         """
         hash = util.sha1(fcl.path()).hexdigest()
         self._repo.opener.write("merge/" + hash, fcl.data())
         self._state[fd] = ['u', hash, fcl.path(),
                            fca.path(), hex(fca.filenode()),
                            fco.path(), hex(fco.filenode()),
                            fcl.flags()]
         self._dirty = True
 
     def __contains__(self, dfile):
         return dfile in self._state
 
     def __getitem__(self, dfile):
         return self._state[dfile][0]
 
     def __iter__(self):
         return iter(sorted(self._state))
 
     def files(self):
         return self._state.keys()
 
     def mark(self, dfile, state):
         self._state[dfile][0] = state
         self._dirty = True
 
     def unresolved(self):
         """Obtain the paths of unresolved files."""
 
         for f, entry in self._state.items():
             if entry[0] == 'u':
                 yield f
 
     def resolve(self, dfile, wctx):
         """rerun merge process for file path `dfile`"""
         if self[dfile] == 'r':
             return 0
         stateentry = self._state[dfile]
         state, hash, lfile, afile, anode, ofile, onode, flags = stateentry
         octx = self._repo[self._other]
         fcd = wctx[dfile]
         fco = octx[ofile]
         fca = self._repo.filectx(afile, fileid=anode)
         # "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:
                 self._repo.ui.warn(_('warning: cannot merge flags for %s\n') %
                                    afile)
             elif flags == fla:
                 flags = flo
         # restore local
         f = self._repo.opener("merge/" + hash)
         self._repo.wwrite(dfile, f.read(), flags)
         f.close()
         r = filemerge.filemerge(self._repo, self._local, lfile, fcd, fco, fca)
         if r is None:
             # no real conflict
             del self._state[dfile]
             self._dirty = True
         elif not r:
             self.mark(dfile, 'r')
         return r
 
 def _checkunknownfile(repo, wctx, mctx, f):
     return (not repo.dirstate._ignore(f)
         and os.path.isfile(repo.wjoin(f))
         and repo.wopener.audit.check(f)
         and repo.dirstate.normalize(f) not in repo.dirstate
         and mctx[f].cmp(wctx[f]))
 
 def _checkunknown(repo, wctx, mctx):
     "check for collisions between unknown files and files in mctx"
 
     error = False
     for f in mctx:
         if f not in wctx and _checkunknownfile(repo, wctx, mctx, f):
             error = True
             wctx._repo.ui.warn(_("%s: untracked file differs\n") % f)
     if error:
         raise util.Abort(_("untracked files in working directory differ "
                            "from files in requested revision"))
 
 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 = []
     state = branchmerge and 'r' or 'f'
     for f in wctx.deleted():
         if f not in mctx:
             actions.append((f, state, None, "forget deleted"))
 
     if not branchmerge:
         for f in wctx.removed():
             if f not in mctx:
                 actions.append((f, "f", None, "forget removed"))
 
     return actions
 
 def _checkcollision(repo, wmf, actions):
     # build provisional merged manifest up
     pmmf = set(wmf)
 
     def addop(f, args):
         pmmf.add(f)
     def removeop(f, args):
         pmmf.discard(f)
     def nop(f, args):
         pass
 
     def renamemoveop(f, args):
         f2, flags = args
         pmmf.discard(f2)
         pmmf.add(f)
     def renamegetop(f, args):
         f2, flags = args
         pmmf.add(f)
     def mergeop(f, args):
         f1, f2, fa, move, anc = args
         if move:
             pmmf.discard(f1)
         pmmf.add(f)
 
     opmap = {
         "a": addop,
         "dm": renamemoveop,
         "dg": renamegetop,
         "dr": nop,
         "e": nop,
         "k": nop,
         "f": addop, # untracked file should be kept in working directory
         "g": addop,
         "m": mergeop,
         "r": removeop,
         "rd": nop,
         "cd": addop,
         "dc": addop,
     }
     for f, m, args, msg in actions:
         op = opmap.get(m)
         assert op, m
         op(f, args)
 
     # check case-folding collision in provisional merged manifest
     foldmap = {}
     for f in sorted(pmmf):
         fold = util.normcase(f)
         if fold in foldmap:
             raise util.Abort(_("case-folding collision between %s and %s")
                              % (f, foldmap[fold]))
         foldmap[fold] = f
 
 def manifestmerge(repo, wctx, p2, pa, branchmerge, force, partial,
                   acceptremote, followcopies):
     """
     Merge p1 and p2 with ancestor pa and generate merge action list
 
     branchmerge and force are as passed in to update
     partial = function to filter file lists
     acceptremote = accept the incoming changes without prompting
     """
 
     actions, copy, movewithdir = [], {}, {}
 
     # manifests fetched in order are going to be faster, so prime the caches
     [x.manifest() for x in
      sorted(wctx.parents() + [p2, pa], key=lambda x: x.rev())]
 
     if followcopies:
         ret = copies.mergecopies(repo, wctx, p2, pa)
         copy, movewithdir, diverge, renamedelete = ret
         for of, fl in diverge.iteritems():
             actions.append((of, "dr", (fl,), "divergent renames"))
         for of, fl in renamedelete.iteritems():
             actions.append((of, "rd", (fl,), "rename and delete"))
 
     repo.ui.note(_("resolving manifests\n"))
     repo.ui.debug(" branchmerge: %s, force: %s, partial: %s\n"
                   % (bool(branchmerge), bool(force), bool(partial)))
     repo.ui.debug(" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
 
     m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
     copied = set(copy.values())
     copied.update(movewithdir.values())
 
     if '.hgsubstate' in m1:
         # check whether sub state is modified
         for s in sorted(wctx.substate):
             if wctx.sub(s).dirty():
                 m1['.hgsubstate'] += "+"
                 break
 
     aborts = []
     # Compare manifests
     fdiff = dicthelpers.diff(m1, m2)
     flagsdiff = m1.flagsdiff(m2)
     diff12 = dicthelpers.join(fdiff, flagsdiff)
 
     for f, (n12, fl12) in diff12.iteritems():
         if n12:
             n1, n2 = n12
         else: # file contents didn't change, but flags did
             n1 = n2 = m1.get(f, None)
             if n1 is None:
                 # Since n1 == n2, the file isn't present in m2 either. This
                 # means that the file was removed or deleted locally and
                 # removed remotely, but that residual entries remain in flags.
                 # This can happen in manifests generated by workingctx.
                 continue
         if fl12:
             fl1, fl2 = fl12
         else: # flags didn't change, file contents did
             fl1 = fl2 = m1.flags(f)
 
         if partial and not partial(f):
             continue
         if n1 and n2:
             fa = f
             a = ma.get(f, nullid)
             if a == nullid:
                 fa = copy.get(f, f)
                 # Note: f as default is wrong - we can't really make a 3-way
                 # merge without an ancestor file.
             fla = ma.flags(fa)
             nol = 'l' not in fl1 + fl2 + fla
             if n2 == a and fl2 == fla:
                 actions.append((f, "k", (), "keep")) # remote unchanged
             elif n1 == a and fl1 == fla: # local unchanged - use remote
                 if n1 == n2: # optimization: keep local content
                     actions.append((f, "e", (fl2,), "update permissions"))
                 else:
                     actions.append((f, "g", (fl2,), "remote is newer"))
             elif nol and n2 == a: # remote only changed 'x'
                 actions.append((f, "e", (fl2,), "update permissions"))
             elif nol and n1 == a: # local only changed 'x'
                 actions.append((f, "g", (fl1,), "remote is newer"))
             else: # both changed something
                 actions.append((f, "m", (f, f, fa, False, pa.node()),
                                "versions differ"))
         elif f in copied: # files we'll deal with on m2 side
             pass
         elif n1 and f in movewithdir: # directory rename, move local
             f2 = movewithdir[f]
             actions.append((f2, "dm", (f, fl1),
                             "remote directory rename - move from " + f))
         elif n1 and f in copy:
             f2 = copy[f]
             actions.append((f, "m", (f, f2, f2, False, pa.node()),
                             "local copied/moved from " + f2))
         elif n1 and f in ma: # clean, a different, no remote
             if n1 != ma[f]:
                 if acceptremote:
                     actions.append((f, "r", None, "remote delete"))
                 else:
                     actions.append((f, "cd", None, "prompt changed/deleted"))
             elif n1[20:] == "a": # added, no remote
                 actions.append((f, "f", None, "remote deleted"))
             else:
                 actions.append((f, "r", None, "other deleted"))
         elif n2 and f in movewithdir:
             f2 = movewithdir[f]
             actions.append((f2, "dg", (f, fl2),
                             "local directory rename - get from " + f))
         elif n2 and f in copy:
             f2 = copy[f]
             if f2 in m2:
                 actions.append((f, "m", (f2, f, f2, False, pa.node()),
                                 "remote copied from " + f2))
             else:
                 actions.append((f, "m", (f2, f, f2, True, pa.node()),
                                 "remote moved from " + f2))
         elif n2 and f not in ma:
             # local unknown, remote created: the logic is described by the
             # following table:
             #
             # force  branchmerge  different  |  action
             #   n         *           n      |    get
             #   n         *           y      |   abort
             #   y         n           *      |    get
             #   y         y           n      |    get
             #   y         y           y      |   merge
             #
             # Checking whether the files are different is expensive, so we
             # don't do that when we can avoid it.
             if force and not branchmerge:
                 actions.append((f, "g", (fl2,), "remote created"))
             else:
                 different = _checkunknownfile(repo, wctx, p2, f)
                 if force and branchmerge and different:
                     # FIXME: This is wrong - f is not in ma ...
                     actions.append((f, "m", (f, f, f, False, pa.node()),
                                     "remote differs from untracked local"))
                 elif not force and different:
                     aborts.append((f, "ud"))
                 else:
                     actions.append((f, "g", (fl2,), "remote created"))
         elif n2 and n2 != ma[f]:
             different = _checkunknownfile(repo, wctx, p2, f)
             if not force and different:
                 aborts.append((f, "ud"))
             else:
                 # if different: old untracked f may be overwritten and lost
                 if acceptremote:
                     actions.append((f, "g", (m2.flags(f),),
                                    "remote recreating"))
                 else:
                     actions.append((f, "dc", (m2.flags(f),),
                                    "prompt deleted/changed"))
 
     for f, m in sorted(aborts):
         if m == "ud":
             repo.ui.warn(_("%s: untracked file differs\n") % f)
         else: assert False, m
     if aborts:
         raise util.Abort(_("untracked files in working directory differ "
                            "from files in requested revision"))
 
     if not util.checkcase(repo.path):
         # check collision between files only in p2 for clean update
         if (not branchmerge and
             (force or not wctx.dirty(missing=True, branch=False))):
             _checkcollision(repo, m2, [])
         else:
             _checkcollision(repo, m1, actions)
 
     return actions
 
+actionpriority = dict((m, p) for p, m in enumerate(
+    ['r', 'f', 'g', 'a', 'k', 'm', 'dm', 'dg', 'dr', 'cd', 'dc', 'rd', 'e']))
+
 def actionkey(a):
-    return a[1] in "rf" and -1 or 0, a
+    return actionpriority[a[1]], a
 
 def getremove(repo, mctx, overwrite, args):
     """apply usually-non-interactive updates to the working directory
 
     mctx is the context to be merged into the working copy
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     unlink = util.unlinkpath
     wjoin = repo.wjoin
     fctx = mctx.filectx
     wwrite = repo.wwrite
     audit = repo.wopener.audit
     i = 0
     for arg in args:
         f = arg[0]
         if arg[1] == 'r':
             if verbose:
                 repo.ui.note(_("removing %s\n") % f)
             audit(f)
             try:
                 unlink(wjoin(f), ignoremissing=True)
             except OSError, inst:
                 repo.ui.warn(_("update failed to remove %s: %s!\n") %
                              (f, inst.strerror))
         else:
             if verbose:
                 repo.ui.note(_("getting %s\n") % f)
             wwrite(f, fctx(f).data(), arg[2][0])
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
 def applyupdates(repo, actions, wctx, mctx, overwrite):
     """apply the merge action list to the working directory
 
     wctx is the working copy context
     mctx is the context to be merged into the working copy
 
     Return a tuple of counts (updated, merged, removed, unresolved) that
     describes how many files were affected by the update.
     """
 
     updated, merged, removed, unresolved = 0, 0, 0, 0
     ms = mergestate(repo)
     ms.reset(wctx.p1().node(), mctx.node())
     moves = []
     actions.sort(key=actionkey)
 
     # prescan for merges
     for a in actions:
         f, m, args, msg = a
         repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m))
         if m == "m": # merge
             f1, f2, fa, move, anc = args
             if f == '.hgsubstate': # merged internally
                 continue
             repo.ui.debug("  preserving %s for resolve of %s\n" % (f1, f))
             fcl = wctx[f1]
             fco = mctx[f2]
             actx = repo[anc]
             if fa in actx:
                 fca = actx[fa]
             else:
                 fca = repo.filectx(f1, fileid=nullrev)
             ms.add(fcl, fco, fca, f)
             if f1 != f and move:
                 moves.append(f1)
 
     audit = repo.wopener.audit
 
     # remove renamed files after safely stored
     for f in moves:
         if os.path.lexists(repo.wjoin(f)):
             repo.ui.debug("removing %s\n" % f)
             audit(f)
             util.unlinkpath(repo.wjoin(f))
 
     numupdates = len([a for a in actions if a[1] != 'k'])
     workeractions = [a for a in actions if a[1] in 'gr']
     updateactions = [a for a in workeractions if a[1] == 'g']
     updated = len(updateactions)
     removeactions = [a for a in workeractions if a[1] == 'r']
     removed = len(removeactions)
     actions = [a for a in actions if a[1] not in 'grk']
 
     hgsub = [a[1] for a in workeractions if a[0] == '.hgsubstate']
     if hgsub and hgsub[0] == 'r':
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
 
     z = 0
     prog = worker.worker(repo.ui, 0.001, getremove, (repo, mctx, overwrite),
                          removeactions)
     for i, item in prog:
         z += i
         repo.ui.progress(_('updating'), z, item=item, total=numupdates,
                          unit=_('files'))
     prog = worker.worker(repo.ui, 0.001, getremove, (repo, mctx, overwrite),
                          updateactions)
     for i, item in prog:
         z += i
         repo.ui.progress(_('updating'), z, item=item, total=numupdates,
                          unit=_('files'))
 
     if hgsub and hgsub[0] == 'g':
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
 
     _updating = _('updating')
     _files = _('files')
     progress = repo.ui.progress
 
     for i, a in enumerate(actions):
         f, m, args, msg = a
         progress(_updating, z + i + 1, item=f, total=numupdates, unit=_files)
         if m == "m": # merge
             f1, f2, fa, move, anc = args
             if f == '.hgsubstate': # subrepo states need updating
                 subrepo.submerge(repo, wctx, mctx, wctx.ancestor(mctx),
                                  overwrite)
                 continue
             audit(f)
             r = ms.resolve(f, wctx)
             if r is not None and r > 0:
                 unresolved += 1
             else:
                 if r is None:
                     updated += 1
                 else:
                     merged += 1
         elif m == "dm": # directory rename, move local
             f0, flags = args
             repo.ui.note(_("moving %s to %s\n") % (f0, f))
             audit(f)
             repo.wwrite(f, wctx.filectx(f0).data(), flags)
             util.unlinkpath(repo.wjoin(f0))
             updated += 1
         elif m == "dg": # local directory rename, get
             f0, flags = args
             repo.ui.note(_("getting %s to %s\n") % (f0, f))
             repo.wwrite(f, mctx.filectx(f0).data(), flags)
             updated += 1
         elif m == "dr": # divergent renames
             fl, = args
             repo.ui.warn(_("note: possible conflict - %s was renamed "
                            "multiple times to:\n") % f)
             for nf in fl:
                 repo.ui.warn(" %s\n" % nf)
         elif m == "rd": # rename and delete
             fl, = args
             repo.ui.warn(_("note: possible conflict - %s was deleted "
                            "and renamed to:\n") % f)
             for nf in fl:
                 repo.ui.warn(" %s\n" % nf)
         elif m == "e": # exec
             flags, = args
             audit(f)
             util.setflags(repo.wjoin(f), 'l' in flags, 'x' in flags)
             updated += 1
     ms.commit()
     progress(_updating, None, total=numupdates, unit=_files)
 
     return updated, merged, removed, unresolved
 
 def calculateupdates(repo, wctx, mctx, ancestors, branchmerge, force, partial,
                      acceptremote, followcopies):
     "Calculate the actions needed to merge mctx into wctx using ancestors"
 
     if len(ancestors) == 1: # default
         actions = manifestmerge(repo, wctx, mctx, ancestors[0],
                                 branchmerge, force,
                                 partial, acceptremote, followcopies)
 
     else: # only when merge.preferancestor=* - experimentalish code
         repo.ui.status(
             _("note: merging %s and %s using bids from ancestors %s\n") %
             (wctx, mctx, _(' and ').join(str(anc) for anc in ancestors)))
 
         # Call for bids
         fbids = {} # mapping filename to list af action bids
         for ancestor in ancestors:
             repo.ui.note(_('\ncalculating bids for ancestor %s\n') % ancestor)
             actions = manifestmerge(repo, wctx, mctx, ancestor,
                                     branchmerge, force,
                                     partial, acceptremote, followcopies)
             for a in sorted(actions):
                 f, m, args, msg = a
                 repo.ui.debug(' %s: %s -> %s\n' % (f, msg, m))
                 if f in fbids:
                     fbids[f].append(a)
                 else:
                     fbids[f] = [a]
 
         # Pick the best bid for each file
         repo.ui.note(_('\nauction for merging merge bids\n'))
         actions = []
         for f, bidsl in sorted(fbids.items()):
             # Consensus?
             a0 = bidsl[0]
             if util.all(a == a0 for a in bidsl[1:]): # len(bidsl) is > 1
                 repo.ui.note(" %s: consensus for %s\n" % (f, a0[1]))
                 actions.append(a0)
                 continue
             # Group bids by kind of action
             bids = {}
             for a in bidsl:
                 m = a[1]
                 if m in bids:
                     bids[m].append(a)
                 else:
                     bids[m] = [a]
             # If keep is an option, just do it.
             if "k" in bids:
                 repo.ui.note(" %s: picking 'keep' action\n" % f)
                 actions.append(bids["k"][0])
                 continue
             # If all gets agree [how could they not?], just do it.
             if "g" in bids:
                 ga0 = bids["g"][0]
                 if util.all(a == ga0 for a in bids["g"][1:]):
                     repo.ui.note(" %s: picking 'get' action\n" % f)
                     actions.append(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 _f, m, args, msg in bidsl:
                 repo.ui.note('  %s -> %s\n' % (msg, m))
             # Pick random action. TODO: Instead, prompt user when resolving
             a0 = bidsl[0]
             repo.ui.warn(_(' %s: ambiguous merge - picked %s action\n') %
                          (f, a0[1]))
             actions.append(a0)
             continue
         repo.ui.note(_('end of auction\n\n'))
 
     # Filter out prompts.
     newactions, prompts = [], []
     for a in actions:
         if a[1] in ("cd", "dc"):
             prompts.append(a)
         else:
             newactions.append(a)
     # Prompt and create actions. TODO: Move this towards resolve phase.
     for f, m, args, msg in sorted(prompts):
         if m == "cd":
             if repo.ui.promptchoice(
                 _("local changed %s which remote deleted\n"
                   "use (c)hanged version or (d)elete?"
                   "$$ &Changed $$ &Delete") % f, 0):
                 newactions.append((f, "r", None, "prompt delete"))
             else:
                 newactions.append((f, "a", None, "prompt keep"))
         elif m == "dc":
             flags, = args
             if repo.ui.promptchoice(
                 _("remote changed %s which local deleted\n"
                   "use (c)hanged version or leave (d)eleted?"
                   "$$ &Changed $$ &Deleted") % f, 0) == 0:
                 newactions.append((f, "g", (flags,), "prompt recreating"))
         else: assert False, m
 
     if wctx.rev() is None:
         newactions += _forgetremoved(wctx, mctx, branchmerge)
 
     return newactions
 
 def recordupdates(repo, actions, branchmerge):
     "record merge actions to the dirstate"
 
     for a in actions:
         f, m, args, msg = a
-        if m == "r": # remove
+        if m == "r": # remove (must come first)
             if branchmerge:
                 repo.dirstate.remove(f)
             else:
                 repo.dirstate.drop(f)
+        elif m == "f": # forget (must come first)
+            repo.dirstate.drop(f)
         elif m == "a": # re-add
             if not branchmerge:
                 repo.dirstate.add(f)
-        elif m == "f": # forget
-            repo.dirstate.drop(f)
         elif m == "e": # exec change
             repo.dirstate.normallookup(f)
         elif m == "k": # keep
             pass
         elif m == "g": # get
             if branchmerge:
                 repo.dirstate.otherparent(f)
             else:
                 repo.dirstate.normal(f)
         elif m == "m": # 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)
         elif m == "dm": # directory rename, move local
             f0, flag = args
             if f0 not in repo.dirstate:
                 # untracked file moved
                 continue
             if branchmerge:
                 repo.dirstate.add(f)
                 repo.dirstate.remove(f0)
                 repo.dirstate.copy(f0, f)
             else:
                 repo.dirstate.normal(f)
                 repo.dirstate.drop(f0)
         elif m == "dg": # directory 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, partial, ancestor=None,
            mergeancestor=False):
     """
     Perform a merge between the working directory and the given node
 
     node = the node to update to, or None if unspecified
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     partial = a function to filter file lists (dirstate not updated)
     mergeancestor = whether it is merging with an ancestor. If true,
       we should accept the incoming changes for any prompts that occur.
       If false, merging with an ancestor (fast-forward) is only allowed
       between different named branches. This flag is used by rebase extension
       as a temporary fix and should be avoided in general.
 
     The table below shows all the behaviors of the update command
     given the -c and -C or no options, whether the working directory
     is dirty, whether a revision is specified, and the relationship of
     the parent rev to the target rev (linear, on the same named
     branch, or on another named branch).
 
     This logic is tested by test-update-branches.t.
 
     -c  -C  dirty  rev  |  linear   same  cross
      n   n    n     n   |    ok     (1)     x
      n   n    n     y   |    ok     ok     ok
      n   n    y     n   |   merge   (2)    (2)
      n   n    y     y   |   merge   (3)    (3)
      n   y    *     *   |    ---  discard  ---
      y   n    y     *   |    ---    (4)    ---
      y   n    n     *   |    ---    ok     ---
      y   y    *     *   |    ---    (5)    ---
 
     x = can't happen
     * = don't-care
     1 = abort: not a linear update (merge or update --check to force update)
     2 = abort: uncommitted changes (commit and merge, or update --clean to
                  discard changes)
     3 = abort: uncommitted changes (commit or update --clean to discard changes)
     4 = abort: uncommitted changes (checked in commands.py)
     5 = incompatible options (checked in commands.py)
 
     Return the same tuple as applyupdates().
     """
 
     onode = node
     wlock = repo.wlock()
     try:
         wc = repo[None]
         pl = wc.parents()
         p1 = pl[0]
         pas = [None]
         if ancestor:
             pas = [repo[ancestor]]
 
         if node is None:
             # Here is where we should consider bookmarks, divergent bookmarks,
             # foreground changesets (successors), and tip of current branch;
             # but currently we are only checking the branch tips.
             try:
                 node = repo.branchtip(wc.branch())
             except error.RepoLookupError:
                 if wc.branch() == "default": # no default branch!
                     node = repo.lookup("tip") # update to tip
                 else:
                     raise util.Abort(_("branch %s not found") % wc.branch())
 
             if p1.obsolete() and not p1.children():
                 # allow updating to successors
                 successors = obsolete.successorssets(repo, p1.node())
 
                 # behavior of certain cases is as follows,
                 #
                 # divergent changesets: update to highest rev, similar to what
                 #     is currently done when there are more than one head
                 #     (i.e. 'tip')
                 #
                 # replaced changesets: same as divergent except we know there
                 # is no conflict
                 #
                 # pruned changeset: no update is done; though, we could
                 #     consider updating to the first non-obsolete parent,
                 #     similar to what is current done for 'hg prune'
 
                 if successors:
                     # flatten the list here handles both divergent (len > 1)
                     # and the usual case (len = 1)
                     successors = [n for sub in successors for n in sub]
 
                     # get the max revision for the given successors set,
                     # i.e. the 'tip' of a set
                     node = repo.revs("max(%ln)", successors)[0]
                     pas = [p1]
 
         overwrite = force and not branchmerge
 
         p2 = repo[node]
         if pas[0] is None:
             if repo.ui.config("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=True)]
 
         fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2)
 
         ### check phase
         if not overwrite and len(pl) > 1:
             raise util.Abort(_("outstanding uncommitted merges"))
         if branchmerge:
             if pas == [p2]:
                 raise util.Abort(_("merging with a working directory ancestor"
                                    " has no effect"))
             elif pas == [p1]:
                 if not mergeancestor and p1.branch() == p2.branch():
                     raise util.Abort(_("nothing to merge"),
                                      hint=_("use 'hg update' "
                                             "or check 'hg heads'"))
             if not force and (wc.files() or wc.deleted()):
                 raise util.Abort(_("uncommitted changes"),
                                  hint=_("use 'hg status' to list changes"))
             for s in sorted(wc.substate):
                 if wc.sub(s).dirty():
                     raise util.Abort(_("uncommitted changes in "
                                        "subrepository '%s'") % s)
 
         elif not overwrite:
             if p1 == p2: # no-op update
                 # call the hooks and exit early
                 repo.hook('preupdate', throw=True, parent1=xp2, parent2='')
                 repo.hook('update', parent1=xp2, parent2='', error=0)
                 return 0, 0, 0, 0
 
             if pas not in ([p1], [p2]):  # nonlinear
                 dirty = wc.dirty(missing=True)
                 if dirty or onode is None:
                     # Branching is a bit strange to ensure we do the minimal
                     # amount of call to obsolete.background.
                     foreground = obsolete.foreground(repo, [p1.node()])
                     # note: the <node> variable contains a random identifier
                     if repo[node].node() in foreground:
                         pas = [p1]  # allow updating to successors
                     elif dirty:
                         msg = _("uncommitted changes")
                         if onode is None:
                             hint = _("commit and merge, or update --clean to"
                                      " discard changes")
                         else:
                             hint = _("commit or update --clean to discard"
                                      " changes")
                         raise util.Abort(msg, hint=hint)
                     else:  # node is none
                         msg = _("not a linear update")
                         hint = _("merge or update --check to force update")
                         raise util.Abort(msg, hint=hint)
                 else:
                     # Allow jumping branches if clean and specific rev given
                     pas = [p1]
 
         followcopies = False
         if overwrite:
             pas = [wc]
         elif pas == [p2]: # backwards
             pas = [wc.p1()]
         elif not branchmerge and not wc.dirty(missing=True):
             pass
         elif pas[0] and repo.ui.configbool("merge", "followcopies", True):
             followcopies = True
 
         ### calculate phase
         actions = calculateupdates(repo, wc, p2, pas, branchmerge, force,
                                    partial, mergeancestor, followcopies)
 
         ### apply phase
         if not branchmerge: # just jump to the new rev
             fp1, fp2, xp1, xp2 = fp2, nullid, xp2, ''
         if not partial:
             repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
             # note that we're in the middle of an update
             repo.vfs.write('updatestate', p2.hex())
 
         stats = applyupdates(repo, actions, wc, p2, overwrite)
 
         if not partial:
             repo.setparents(fp1, fp2)
             recordupdates(repo, actions, branchmerge)
             # update completed, clear state
             util.unlink(repo.join('updatestate'))
 
             if not branchmerge:
                 repo.dirstate.setbranch(p2.branch())
     finally:
         wlock.release()
 
     if not partial:
         repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3])
     return stats

tests/test-graft.t

@@ -1,587 +1,587 b''
 Create a repo with some stuff in it:
 
   $ hg init a
   $ cd a
   $ echo a > a
   $ echo a > d
   $ echo a > e
   $ hg ci -qAm0
   $ echo b > a
   $ hg ci -m1 -u bar
   $ hg mv a b
   $ hg ci -m2
   $ hg cp b c
   $ hg ci -m3 -u baz
   $ echo b > d
   $ echo f > e
   $ hg ci -m4
   $ hg up -q 3
   $ echo b > e
   $ hg branch -q stable
   $ hg ci -m5
   $ hg merge -q default --tool internal:local
   $ hg branch -q default
   $ hg ci -m6
   $ hg phase --public 3
   $ hg phase --force --secret 6
 
   $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
   @    [e-mail]: 6
   |\
   | o  [e-mail]: 5
   | |
   o |  [e-mail]: 4
   |/
   o  [e-mail]: 3
   |
   o  [e-mail]: 2
   |
   o  [e-mail]: 1
   |
   o  [e-mail]: 0
   
 
 Need to specify a rev:
 
   $ hg graft
   abort: no revisions specified
   [255]
 
 Can't graft ancestor:
 
   $ hg graft 1 2
   skipping ancestor revision 1
   skipping ancestor revision 2
   [255]
 
 Specify revisions with -r:
 
   $ hg graft -r 1 -r 2
   skipping ancestor revision 1
   skipping ancestor revision 2
   [255]
 
   $ hg graft -r 1 2
   skipping ancestor revision 2
   skipping ancestor revision 1
   [255]
 
 Can't graft with dirty wd:
 
   $ hg up -q 0
   $ echo foo > a
   $ hg graft 1
   abort: uncommitted changes
   [255]
   $ hg revert a
 
 Graft a rename:
 
   $ hg graft 2 -u foo
   grafting revision 2
   merging a and b to b
   $ hg export tip --git
   # HG changeset patch
   # User foo
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID ef0ef43d49e79e81ddafdc7997401ba0041efc82
   # Parent  68795b066622ca79a25816a662041d8f78f3cd9e
   2
   
   diff --git a/a b/b
   rename from a
   rename to b
 
 Look for extra:source
 
   $ hg log --debug -r tip
   changeset:   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
   tag:         tip
   phase:       draft
   parent:      0:68795b066622ca79a25816a662041d8f78f3cd9e
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    7:e59b6b228f9cbf9903d5e9abf996e083a1f533eb
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   files+:      b
   files-:      a
   extra:       branch=default
   extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   description:
   2
   
   
 
 Graft out of order, skipping a merge and a duplicate
 
   $ hg graft 1 5 4 3 'merge()' 2 -n
   skipping ungraftable merge revision 6
   skipping revision 2 (already grafted to 7)
   grafting revision 1
   grafting revision 5
   grafting revision 4
   grafting revision 3
 
   $ hg graft 1 5 4 3 'merge()' 2 --debug
   skipping ungraftable merge revision 6
   scanning for duplicate grafts
   skipping revision 2 (already grafted to 7)
   grafting revision 1
     searching for copies back to rev 1
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 68795b066622, local: ef0ef43d49e7+, remote: 5d205f8b35b6
    b: local copied/moved from a -> m
     preserving b for resolve of b
   updating: b 1/1 files (100.00%)
   picked tool 'internal:merge' for b (binary False symlink False)
   merging b and a to b
   my b@ef0ef43d49e7+ other a@5d205f8b35b6 ancestor a@68795b066622
    premerge successful
   b
   grafting revision 5
     searching for copies back to rev 1
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 6b9e5368ca4e+, remote: 97f8bfe72746
+   e: remote is newer -> g
    b: keep -> k
-   e: remote is newer -> g
   getting e
   updating: e 1/1 files (100.00%)
   e
   grafting revision 4
     searching for copies back to rev 1
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: 4c60f11aa304, local: 1905859650ec+, remote: 9c233e8e184d
+   d: remote is newer -> g
    b: keep -> k
-   d: remote is newer -> g
    e: versions differ -> m
     preserving e for resolve of e
   getting d
   updating: d 1/2 files (50.00%)
   updating: e 2/2 files (100.00%)
   picked tool 'internal:merge' for e (binary False symlink False)
   merging e
   my e@1905859650ec+ other e@9c233e8e184d ancestor e@68795b066622
   warning: conflicts during merge.
   merging e incomplete! (edit conflicts, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use hg resolve and hg graft --continue)
   [255]
 
 Commit while interrupted should fail:
 
   $ hg ci -m 'commit interrupted graft'
   abort: graft in progress
   (use 'hg graft --continue' or 'hg update' to abort)
   [255]
 
 Abort the graft and try committing:
 
   $ hg up -C .
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo c >> e
   $ hg ci -mtest
 
   $ hg strip . --config extensions.mq=
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/a/.hg/strip-backup/*-backup.hg (glob)
 
 Graft again:
 
   $ hg graft 1 5 4 3 'merge()' 2
   skipping ungraftable merge revision 6
   skipping revision 2 (already grafted to 7)
   skipping revision 1 (already grafted to 8)
   skipping revision 5 (already grafted to 9)
   grafting revision 4
   merging e
   warning: conflicts during merge.
   merging e incomplete! (edit conflicts, then use 'hg resolve --mark')
   abort: unresolved conflicts, can't continue
   (use hg resolve and hg graft --continue)
   [255]
 
 Continue without resolve should fail:
 
   $ hg graft -c
   grafting revision 4
   abort: unresolved merge conflicts (see hg help resolve)
   [255]
 
 Fix up:
 
   $ echo b > e
   $ hg resolve -m e
   no more unresolved files
 
 Continue with a revision should fail:
 
   $ hg graft -c 6
   abort: can't specify --continue and revisions
   [255]
 
   $ hg graft -c -r 6
   abort: can't specify --continue and revisions
   [255]
 
 Continue for real, clobber usernames
 
   $ hg graft -c -U
   grafting revision 4
   grafting revision 3
 
 Compare with original:
 
   $ hg diff -r 6
   $ hg status --rev 0:. -C
   M d
   M e
   A b
     a
   A c
     a
   R a
 
 View graph:
 
   $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
   @  [e-mail]: 3
   |
   o  [e-mail]: 4
   |
   o  [e-mail]: 5
   |
   o  [e-mail]: 1
   |
   o  [e-mail]: 2
   |
   | o    [e-mail]: 6
   | |\
   | | o  [e-mail]: 5
   | | |
   | o |  [e-mail]: 4
   | |/
   | o  [e-mail]: 3
   | |
   | o  [e-mail]: 2
   | |
   | o  [e-mail]: 1
   |/
   o  [e-mail]: 0
   
 Graft again onto another branch should preserve the original source
   $ hg up -q 0
   $ echo 'g'>g
   $ hg add g
   $ hg ci -m 7
   created new head
   $ hg graft 7
   grafting revision 7
 
   $ hg log -r 7 --template '{rev}:{node}\n'
   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
   $ hg log -r 2 --template '{rev}:{node}\n'
   2:5c095ad7e90f871700f02dd1fa5012cb4498a2d4
 
   $ hg log --debug -r tip
   changeset:   13:9db0f28fd3747e92c57d015f53b5593aeec53c2d
   tag:         tip
   phase:       draft
   parent:      12:b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    13:dc313617b8c32457c0d589e0dbbedfe71f3cd637
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   files+:      b
   files-:      a
   extra:       branch=default
   extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
   description:
   2
   
   
 Disallow grafting an already grafted cset onto its original branch
   $ hg up -q 6
   $ hg graft 7
   skipping already grafted revision 7 (was grafted from 2)
   [255]
 
 Disallow grafting already grafted csets with the same origin onto each other
   $ hg up -q 13
   $ hg graft 2
   skipping revision 2 (already grafted to 13)
   [255]
   $ hg graft 7
   skipping already grafted revision 7 (13 also has origin 2)
   [255]
 
   $ hg up -q 7
   $ hg graft 2
   skipping revision 2 (already grafted to 7)
   [255]
   $ hg graft tip
   skipping already grafted revision 13 (7 also has origin 2)
   [255]
 
 Graft with --log
 
   $ hg up -Cq 1
   $ hg graft 3 --log -u foo
   grafting revision 3
   warning: can't find ancestor for 'c' copied from 'b'!
   $ hg log --template '{rev} {parents} {desc}\n' -r tip
   14 1:5d205f8b35b6  3
   (grafted from 4c60f11aa304a54ae1c199feb94e7fc771e51ed8)
 
 Resolve conflicted graft
   $ hg up -q 0
   $ echo b > a
   $ hg ci -m 8
   created new head
   $ echo a > a
   $ hg ci -m 9
   $ hg graft 1 --tool internal:fail
   grafting revision 1
   abort: unresolved conflicts, can't continue
   (use hg resolve and hg graft --continue)
   [255]
   $ hg resolve --all
   merging a
   no more unresolved files
   $ hg graft -c
   grafting revision 1
   $ hg export tip --git
   # HG changeset patch
   # User bar
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID 64ecd9071ce83c6e62f538d8ce7709d53f32ebf7
   # Parent  4bdb9a9d0b84ffee1d30f0dfc7744cade17aa19c
   1
   
   diff --git a/a b/a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -a
   +b
 
 Resolve conflicted graft with rename
   $ echo c > a
   $ hg ci -m 10
   $ hg graft 2 --tool internal:fail
   grafting revision 2
   abort: unresolved conflicts, can't continue
   (use hg resolve and hg graft --continue)
   [255]
   $ hg resolve --all
   merging a and b to b
   no more unresolved files
   $ hg graft -c
   grafting revision 2
   $ hg export tip --git
   # HG changeset patch
   # User test
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
   # Node ID 2e80e1351d6ed50302fe1e05f8bd1d4d412b6e11
   # Parent  e5a51ae854a8bbaaf25cc5c6a57ff46042dadbb4
   2
   
   diff --git a/a b/b
   rename from a
   rename to b
 
 Test simple origin(), with and without args
   $ hg log -r 'origin()'
   changeset:   1:5d205f8b35b6
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   3:4c60f11aa304
   user:        baz
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   4:9c233e8e184d
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     4
   
   changeset:   5:97f8bfe72746
   branch:      stable
   parent:      3:4c60f11aa304
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     5
   
   $ hg log -r 'origin(7)'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Now transplant a graft to test following through copies
   $ hg up -q 0
   $ hg branch -q dev
   $ hg ci -qm "dev branch"
   $ hg --config extensions.transplant= transplant -q 7
   $ hg log -r 'origin(.)'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Test simple destination
   $ hg log -r 'destination()'
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   8:6b9e5368ca4e
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   9:1905859650ec
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     5
   
   changeset:   10:52dc0b4c6907
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     4
   
   changeset:   11:882b35362a6b
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   13:9db0f28fd374
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   14:f64defefacee
   parent:      1:5d205f8b35b6
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   changeset:   17:64ecd9071ce8
   user:        bar
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   changeset:   19:2e80e1351d6e
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg log -r 'destination(2)'
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   13:9db0f28fd374
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   19:2e80e1351d6e
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 Transplants of grafts can find a destination...
   $ hg log -r 'destination(7)'
   changeset:   21:7e61b508e709
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 ... grafts of grafts unfortunately can't
   $ hg graft -q 13
   $ hg log -r 'destination(13)'
 All copies of a cset
   $ hg log -r 'origin(13) or destination(origin(13))'
   changeset:   2:5c095ad7e90f
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   7:ef0ef43d49e7
   parent:      0:68795b066622
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   13:9db0f28fd374
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   19:2e80e1351d6e
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   21:7e61b508e709
   branch:      dev
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   22:1313d0a825e2
   branch:      dev
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
 
 graft works on complex revset
 
   $ hg graft 'origin(13) or destination(origin(13))'
   skipping ancestor revision 21
   skipping ancestor revision 22
   skipping revision 2 (already grafted to 22)
   grafting revision 7
   grafting revision 13
   grafting revision 19
   merging b

tests/test-merge-criss-cross.t

@@ -1,348 +1,348 b''
 Criss cross merging
 
   $ hg init criss-cross
   $ cd criss-cross
   $ echo '0 base' > f1
   $ echo '0 base' > f2
   $ hg ci -Aqm '0 base'
 
   $ echo '1 first change' > f1
   $ hg ci -m '1 first change f1'
 
   $ hg up -qr0
   $ echo '2 first change' > f2
   $ hg ci -qm '2 first change f2'
 
   $ hg merge -qr 1
   $ hg ci -m '3 merge'
 
   $ hg up -qr2
   $ hg merge -qr1
   $ hg ci -qm '4 merge'
 
   $ echo '5 second change' > f1
   $ hg ci -m '5 second change f1'
 
   $ hg up -r3
   note: using 0f6b37dbe527 as ancestor of adfe50279922 and cf89f02107e5
         alternatively, use --config merge.preferancestor=40663881a6dd
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo '6 second change' > f2
   $ hg ci -m '6 second change f2'
 
   $ hg log -G
   @  changeset:   6:3b08d01b0ab5
   |  tag:         tip
   |  parent:      3:cf89f02107e5
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     6 second change f2
   |
   | o  changeset:   5:adfe50279922
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     5 second change f1
   | |
   | o    changeset:   4:7d3e55501ae6
   | |\   parent:      2:40663881a6dd
   | | |  parent:      1:0f6b37dbe527
   | | |  user:        test
   | | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | | |  summary:     4 merge
   | | |
   o---+  changeset:   3:cf89f02107e5
   | | |  parent:      2:40663881a6dd
   |/ /   parent:      1:0f6b37dbe527
   | |    user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
   | |    summary:     3 merge
   | |
   | o  changeset:   2:40663881a6dd
   | |  parent:      0:40494bf2444c
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     2 first change f2
   | |
   o |  changeset:   1:0f6b37dbe527
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     1 first change f1
   |
   o  changeset:   0:40494bf2444c
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     0 base
   
 
   $ hg merge -v --debug --tool internal:dump 5
   note: using 0f6b37dbe527 as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
     preserving f2 for resolve of f2
   getting f1
   updating: f1 1/2 files (50.00%)
   updating: f2 2/2 files (100.00%)
   picked tool 'internal:dump' for f2 (binary False symlink False)
   merging f2
   my f2@3b08d01b0ab5+ other f2@adfe50279922 ancestor f2@40494bf2444c
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
   $ head *
   ==> f1 <==
   5 second change
   
   ==> f2 <==
   6 second change
   
   ==> f2.base <==
   0 base
   
   ==> f2.local <==
   6 second change
   
   ==> f2.orig <==
   6 second change
   
   ==> f2.other <==
   2 first change
 
   $ hg up -qC .
   $ hg merge -v --tool internal:dump 5 --config merge.preferancestor="null 40663881 3b08d"
   note: using 40663881a6dd as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=0f6b37dbe527
   resolving manifests
   merging f1
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
 
 Redo merge with merge.preferancestor="*" to enable bid merge
 
   $ rm f*
   $ hg up -qC .
   $ hg merge -v --debug --tool internal:dump 5 --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: versions differ -> m
    f2: keep -> k
   
   auction for merging merge bids
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
    f1: remote is newer -> g
    f2: keep -> k
   getting f1
   updating: f1 1/1 files (100.00%)
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ head *
   ==> f1 <==
   5 second change
   
   ==> f2 <==
   6 second change
 
 
 The other way around:
 
   $ hg up -C -r5
   note: using 0f6b37dbe527 as ancestor of 3b08d01b0ab5 and adfe50279922
         alternatively, use --config merge.preferancestor=40663881a6dd
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge -v --debug --config merge.preferancestor="*"
   note: merging adfe50279922+ and 3b08d01b0ab5 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: adfe50279922+, remote: 3b08d01b0ab5
    f1: keep -> k
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: adfe50279922+, remote: 3b08d01b0ab5
    f1: versions differ -> m
    f2: remote is newer -> g
   
   auction for merging merge bids
    f1: picking 'keep' action
    f2: picking 'get' action
   end of auction
   
+   f2: remote is newer -> g
    f1: keep -> k
-   f2: remote is newer -> g
   getting f2
   updating: f2 1/1 files (100.00%)
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ head *
   ==> f1 <==
   5 second change
   
   ==> f2 <==
   6 second change
 
 Verify how the output looks and and how verbose it is:
 
   $ hg up -qC
   $ hg merge --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg up -qC
   $ hg merge -v --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
   resolving manifests
   
   calculating bids for ancestor 40663881a6dd
   resolving manifests
   
   auction for merging merge bids
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
   getting f1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg up -qC
   $ hg merge -v --debug --config merge.preferancestor="*"
   note: merging 3b08d01b0ab5+ and adfe50279922 using bids from ancestors 0f6b37dbe527 and 40663881a6dd
   
   calculating bids for ancestor 0f6b37dbe527
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 0f6b37dbe527, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: remote is newer -> g
    f2: versions differ -> m
   
   calculating bids for ancestor 40663881a6dd
     searching for copies back to rev 3
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 40663881a6dd, local: 3b08d01b0ab5+, remote: adfe50279922
    f1: versions differ -> m
    f2: keep -> k
   
   auction for merging merge bids
    f1: picking 'get' action
    f2: picking 'keep' action
   end of auction
   
    f1: remote is newer -> g
    f2: keep -> k
   getting f1
   updating: f1 1/1 files (100.00%)
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cd ..
 
 http://stackoverflow.com/questions/9350005/how-do-i-specify-a-merge-base-to-use-in-a-hg-merge/9430810
 
   $ hg init ancestor-merging
   $ cd ancestor-merging
   $ echo a > x
   $ hg commit -A -m a x
   $ hg update -q 0
   $ echo b >> x
   $ hg commit -m b
   $ hg update -q 0
   $ echo c >> x
   $ hg commit -qm c
   $ hg update -q 1
   $ hg merge -q --tool internal:local 2
   $ echo c >> x
   $ hg commit -m bc
   $ hg update -q 2
   $ hg merge -q --tool internal:local 1
   $ echo b >> x
   $ hg commit -qm cb
 
   $ hg merge
   note: using 70008a2163f6 as ancestor of 0d355fdef312 and 4b8b546a3eef
         alternatively, use --config merge.preferancestor=b211bbc6eb3c
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   c
   b
   c
 
   $ hg up -qC .
 
   $ hg merge --config merge.preferancestor=b211bbc6eb3c
   note: using b211bbc6eb3c as ancestor of 0d355fdef312 and 4b8b546a3eef
         alternatively, use --config merge.preferancestor=70008a2163f6
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   b
   c
   b
 
   $ hg up -qC .
 
   $ hg merge -v --config merge.preferancestor="*"
   note: merging 0d355fdef312+ and 4b8b546a3eef using bids from ancestors 70008a2163f6 and b211bbc6eb3c
   
   calculating bids for ancestor 70008a2163f6
   resolving manifests
   
   calculating bids for ancestor b211bbc6eb3c
   resolving manifests
   
   auction for merging merge bids
    x: multiple bids for merge action:
     versions differ -> m
     versions differ -> m
    x: ambiguous merge - picked m action
   end of auction
   
   merging x
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat x
   a
   c
   b
   c
 
   $ cd ..

tests/test-rename-merge1.t

@@ -1,195 +1,195 b''
   $ hg init
 
   $ echo "[merge]" >> .hg/hgrc
   $ echo "followcopies = 1" >> .hg/hgrc
 
   $ echo foo > a
   $ echo foo > a2
   $ hg add a a2
   $ hg ci -m "start"
 
   $ hg mv a b
   $ hg mv a2 b2
   $ hg ci -m "rename"
 
   $ hg co 0
   2 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
   $ echo blahblah > a
   $ echo blahblah > a2
   $ hg mv a2 c2
   $ hg ci -m "modify"
   created new head
 
   $ hg merge -y --debug
     searching for copies back to rev 1
     unmatched files in local:
      c2
     unmatched files in other:
      b
      b2
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
      src: 'a2' -> dst: 'b2' !
      src: 'a2' -> dst: 'c2' !
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: af1939970a1c, local: 044f8520aeeb+, remote: 85c198ef2f6c
-   a2: divergent renames -> dr
+   b2: remote created -> g
    b: remote moved from a -> m
     preserving a for resolve of b
-   b2: remote created -> g
+   a2: divergent renames -> dr
   removing a
   getting b2
   updating: b2 1/3 files (33.33%)
-  updating: a2 2/3 files (66.67%)
-  note: possible conflict - a2 was renamed multiple times to:
-   c2
-   b2
-  updating: b 3/3 files (100.00%)
+  updating: b 2/3 files (66.67%)
   picked tool 'internal:merge' for b (binary False symlink False)
   merging a and b to b
   my b@044f8520aeeb+ other b@85c198ef2f6c ancestor a@af1939970a1c
    premerge successful
+  updating: a2 3/3 files (100.00%)
+  note: possible conflict - a2 was renamed multiple times to:
+   c2
+   b2
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg status -AC
   M b
     a
   M b2
   R a
   C c2
 
   $ cat b
   blahblah
 
   $ hg ci -m "merge"
 
   $ hg debugindex b
      rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
        0         0      67  .....       1 57eacc201a7f 000000000000 000000000000 (re)
        1        67      72  .....       3 4727ba907962 000000000000 57eacc201a7f (re)
 
   $ hg debugrename b
   b renamed from a:dd03b83622e78778b403775d0d074b9ac7387a66
 
 This used to trigger a "divergent renames" warning, despite no renames
 
   $ hg cp b b3
   $ hg cp b b4
   $ hg ci -A -m 'copy b twice'
   $ hg up eb92d88a9712
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ hg up
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg rm b3 b4
   $ hg ci -m 'clean up a bit of our mess'
 
 We'd rather not warn on divergent renames done in the same changeset (issue2113)
 
   $ hg cp b b3
   $ hg mv b b4
   $ hg ci -A -m 'divergent renames in same changeset'
   $ hg up c761c6948de0
   1 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ hg up
   2 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
 Check for issue2642
 
   $ hg init t
   $ cd t
 
   $ echo c0 > f1
   $ hg ci -Aqm0
 
   $ hg up null -q
   $ echo c1 > f1 # backport
   $ hg ci -Aqm1
   $ hg mv f1 f2
   $ hg ci -qm2
 
   $ hg up 0 -q
   $ hg merge 1 -q --tool internal:local
   $ hg ci -qm3
 
   $ hg merge 2
   merging f1 and f2 to f2
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat f2
   c0
 
   $ cd ..
 
 Check for issue2089
 
   $ hg init repo2089
   $ cd repo2089
 
   $ echo c0 > f1
   $ hg ci -Aqm0
 
   $ hg up null -q
   $ echo c1 > f1
   $ hg ci -Aqm1
 
   $ hg up 0 -q
   $ hg merge 1 -q --tool internal:local
   $ echo c2 > f1
   $ hg ci -qm2
 
   $ hg up 1 -q
   $ hg mv f1 f2
   $ hg ci -Aqm3
 
   $ hg up 2 -q
   $ hg merge 3
   merging f1 and f2 to f2
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ cat f2
   c2
 
   $ cd ..
 
 Check for issue3074
 
   $ hg init repo3074
   $ cd repo3074
   $ echo foo > file
   $ hg add file
   $ hg commit -m "added file"
   $ hg mv file newfile
   $ hg commit -m "renamed file"
   $ hg update 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg rm file
   $ hg commit -m "deleted file"
   created new head
   $ hg merge --debug
     searching for copies back to rev 1
     unmatched files in other:
      newfile
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'file' -> dst: 'newfile' %
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 19d7f95df299, local: 0084274f6b67+, remote: 5d32493049f0
+   newfile: remote created -> g
    file: rename and delete -> rd
-   newfile: remote created -> g
   getting newfile
   updating: newfile 1/2 files (50.00%)
   updating: file 2/2 files (100.00%)
   note: possible conflict - file was deleted and renamed to:
    newfile
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg status
   M newfile
   $ cd ..

tests/test-rename-merge2.t

@@ -1,972 +1,972 b''
 
   $ mkdir -p t
   $ cd t
   $ cat <<EOF > merge
   > import sys, os
   > f = open(sys.argv[1], "wb")
   > f.write("merge %s %s %s" % (sys.argv[1], sys.argv[2], sys.argv[3]))
   > f.close()
   > EOF
 
 perform a test merge with possible renaming
 args:
 $1 = action in local branch
 $2 = action in remote branch
 $3 = action in working dir
 $4 = expected result
 
   $ tm()
   > {
   >     hg init t
   >     cd t
   >     echo "[merge]" >> .hg/hgrc
   >     echo "followcopies = 1" >> .hg/hgrc
   > 
   >     # base
   >     echo base > a
   >     echo base > rev # used to force commits
   >     hg add a rev
   >     hg ci -m "base"
   > 
   >     # remote
   >     echo remote > rev
   >     if [ "$2" != "" ] ; then $2 ; fi
   >     hg ci -m "remote"
   > 
   >     # local
   >     hg co -q 0
   >     echo local > rev
   >     if [ "$1" != "" ] ; then $1 ; fi
   >     hg ci -m "local"
   > 
   >     # working dir
   >     echo local > rev
   >     if [ "$3" != "" ] ; then $3 ; fi
   > 
   >     # merge
   >     echo "--------------"
   >     echo "test L:$1 R:$2 W:$3 - $4"
   >     echo "--------------"
   >     hg merge -y --debug --traceback --tool="python ../merge"
   > 
   >     echo "--------------"
   >     hg status -camC -X rev
   > 
   >     hg ci -m "merge"
   > 
   >     echo "--------------"
   >     echo
   > 
   >     cd ..
   >     rm -r t
   > }
   $ up() {
   >     cp rev $1
   >     hg add $1 2> /dev/null
   >     if [ "$2" != "" ] ; then
   >         cp rev $2
   >         hg add $2 2> /dev/null
   >     fi
   > }
   $ uc() { up $1; hg cp $1 $2; } # update + copy
   $ um() { up $1; hg mv $1 $2; }
   $ nc() { hg cp $1 $2; } # just copy
   $ nm() { hg mv $1 $2; } # just move
   $ tm "up a  " "nc a b" "      " "1  get local a to b"
   created new head
   --------------
   test L:up a   R:nc a b W:       - 1  get local a to b
   --------------
     searching for copies back to rev 1
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: e300d1c794ec+, remote: 4ce40f5aca24
    a: keep -> k
    b: remote copied from a -> m
     preserving a for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging a and b to b
   my b@e300d1c794ec+ other b@4ce40f5aca24 ancestor a@924404dff337
    premerge successful
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@e300d1c794ec+ other rev@4ce40f5aca24 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
     a
   C a
   --------------
   
   $ tm "nc a b" "up a  " "      " "2  get rem change to a and b"
   created new head
   --------------
   test L:nc a b R:up a   W:       - 2  get rem change to a and b
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 86a2aa42fc76+, remote: f4db7e329e71
    a: remote is newer -> g
    b: local copied/moved from a -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   getting a
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b and a to b
   my b@86a2aa42fc76+ other a@f4db7e329e71 ancestor a@924404dff337
    premerge successful
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@86a2aa42fc76+ other rev@f4db7e329e71 ancestor rev@924404dff337
   1 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M a
   M b
     a
   --------------
   
   $ tm "up a  " "nm a b" "      " "3  get local a change to b, remove a"
   created new head
   --------------
   test L:up a   R:nm a b W:       - 3  get local a change to b, remove a
   --------------
     searching for copies back to rev 1
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: e300d1c794ec+, remote: bdb19105162a
    b: remote moved from a -> m
     preserving a for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   removing a
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging a and b to b
   my b@e300d1c794ec+ other b@bdb19105162a ancestor a@924404dff337
    premerge successful
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@e300d1c794ec+ other rev@bdb19105162a ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
     a
   --------------
   
   $ tm "nm a b" "up a  " "      " "4  get remote change to b"
   created new head
   --------------
   test L:nm a b R:up a   W:       - 4  get remote change to b
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 02963e448370+, remote: f4db7e329e71
    b: local copied/moved from a -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b and a to b
   my b@02963e448370+ other a@f4db7e329e71 ancestor a@924404dff337
    premerge successful
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@02963e448370+ other rev@f4db7e329e71 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
     a
   --------------
   
   $ tm "      " "nc a b" "      " "5  get b"
   created new head
   --------------
   test L:       R:nc a b W:       - 5  get b
   --------------
     searching for copies back to rev 1
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 94b33a1b7f2d+, remote: 4ce40f5aca24
    b: remote created -> g
    rev: versions differ -> m
     preserving rev for resolve of rev
   getting b
   updating: b 1/2 files (50.00%)
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@94b33a1b7f2d+ other rev@4ce40f5aca24 ancestor rev@924404dff337
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   C a
   --------------
   
   $ tm "nc a b" "      " "      " "6  nothing"
   created new head
   --------------
   test L:nc a b R:       W:       - 6  nothing
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 86a2aa42fc76+, remote: 97c705ade336
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: rev 1/1 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@86a2aa42fc76+ other rev@97c705ade336 ancestor rev@924404dff337
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   C a
   C b
   --------------
   
   $ tm "      " "nm a b" "      " "7  get b"
   created new head
   --------------
   test L:       R:nm a b W:       - 7  get b
   --------------
     searching for copies back to rev 1
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 94b33a1b7f2d+, remote: bdb19105162a
    a: other deleted -> r
    b: remote created -> g
    rev: versions differ -> m
     preserving rev for resolve of rev
   removing a
   updating: a 1/3 files (33.33%)
   getting b
   updating: b 2/3 files (66.67%)
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@94b33a1b7f2d+ other rev@bdb19105162a ancestor rev@924404dff337
   1 files updated, 1 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   --------------
   
   $ tm "nm a b" "      " "      " "8  nothing"
   created new head
   --------------
   test L:nm a b R:       W:       - 8  nothing
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 02963e448370+, remote: 97c705ade336
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: rev 1/1 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@02963e448370+ other rev@97c705ade336 ancestor rev@924404dff337
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   C b
   --------------
   
   $ tm "um a b" "um a b" "      " "9  do merge with ancestor in a"
   created new head
   --------------
   test L:um a b R:um a b W:       - 9  do merge with ancestor in a
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 62e7bf090eba+, remote: 49b6d8032493
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@62e7bf090eba+ other b@49b6d8032493 ancestor a@924404dff337
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@62e7bf090eba+ other rev@49b6d8032493 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   --------------
   
 
 m "um a c" "um x c" "      " "10 do merge with no ancestor"
 
   $ tm "nm a b" "nm a c" "      " "11 get c, keep b"
   created new head
   --------------
   test L:nm a b R:nm a c W:       - 11 get c, keep b
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     unmatched files in other:
      c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' !
      src: 'a' -> dst: 'c' !
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 02963e448370+, remote: fe905ef2c33e
-   a: divergent renames -> dr
    c: remote created -> g
    rev: versions differ -> m
     preserving rev for resolve of rev
+   a: divergent renames -> dr
   getting c
   updating: c 1/3 files (33.33%)
-  updating: a 2/3 files (66.67%)
+  updating: rev 2/3 files (66.67%)
+  picked tool 'python ../merge' for rev (binary False symlink False)
+  merging rev
+  my rev@02963e448370+ other rev@fe905ef2c33e ancestor rev@924404dff337
+  updating: a 3/3 files (100.00%)
   note: possible conflict - a was renamed multiple times to:
    b
    c
-  updating: rev 3/3 files (100.00%)
-  picked tool 'python ../merge' for rev (binary False symlink False)
-  merging rev
-  my rev@02963e448370+ other rev@fe905ef2c33e ancestor rev@924404dff337
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M c
   C b
   --------------
   
   $ tm "nc a b" "up b  " "      " "12 merge b no ancestor"
   created new head
   --------------
   test L:nc a b R:up b   W:       - 12 merge b no ancestor
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 86a2aa42fc76+, remote: af30c7647fc7
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@86a2aa42fc76+ other b@af30c7647fc7 ancestor b@000000000000
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@86a2aa42fc76+ other rev@af30c7647fc7 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   C a
   --------------
   
   $ tm "up b  " "nm a b" "      " "13 merge b no ancestor"
   created new head
   --------------
   test L:up b   R:nm a b W:       - 13 merge b no ancestor
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 59318016310c+, remote: bdb19105162a
    a: other deleted -> r
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   removing a
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@59318016310c+ other b@bdb19105162a ancestor b@000000000000
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@59318016310c+ other rev@bdb19105162a ancestor rev@924404dff337
   0 files updated, 2 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   --------------
   
   $ tm "nc a b" "up a b" "      " "14 merge b no ancestor"
   created new head
   --------------
   test L:nc a b R:up a b W:       - 14 merge b no ancestor
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 86a2aa42fc76+, remote: 8dbce441892a
    a: remote is newer -> g
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   getting a
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@86a2aa42fc76+ other b@8dbce441892a ancestor b@000000000000
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@86a2aa42fc76+ other rev@8dbce441892a ancestor rev@924404dff337
   1 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M a
   M b
   --------------
   
   $ tm "up b  " "nm a b" "      " "15 merge b no ancestor, remove a"
   created new head
   --------------
   test L:up b   R:nm a b W:       - 15 merge b no ancestor, remove a
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 59318016310c+, remote: bdb19105162a
    a: other deleted -> r
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   removing a
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@59318016310c+ other b@bdb19105162a ancestor b@000000000000
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@59318016310c+ other rev@bdb19105162a ancestor rev@924404dff337
   0 files updated, 2 files merged, 1 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   --------------
   
   $ tm "nc a b" "up a b" "      " "16 get a, merge b no ancestor"
   created new head
   --------------
   test L:nc a b R:up a b W:       - 16 get a, merge b no ancestor
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 86a2aa42fc76+, remote: 8dbce441892a
    a: remote is newer -> g
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   getting a
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@86a2aa42fc76+ other b@8dbce441892a ancestor b@000000000000
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@86a2aa42fc76+ other rev@8dbce441892a ancestor rev@924404dff337
   1 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M a
   M b
   --------------
   
   $ tm "up a b" "nc a b" "      " "17 keep a, merge b no ancestor"
   created new head
   --------------
   test L:up a b R:nc a b W:       - 17 keep a, merge b no ancestor
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 0b76e65c8289+, remote: 4ce40f5aca24
    a: keep -> k
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@0b76e65c8289+ other b@4ce40f5aca24 ancestor b@000000000000
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@0b76e65c8289+ other rev@4ce40f5aca24 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   C a
   --------------
   
   $ tm "nm a b" "up a b" "      " "18 merge b no ancestor"
   created new head
   --------------
   test L:nm a b R:up a b W:       - 18 merge b no ancestor
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 02963e448370+, remote: 8dbce441892a
   remote changed a which local deleted
   use (c)hanged version or leave (d)eleted? c
    a: prompt recreating -> g
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   getting a
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@02963e448370+ other b@8dbce441892a ancestor b@000000000000
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@02963e448370+ other rev@8dbce441892a ancestor rev@924404dff337
   1 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M a
   M b
   --------------
   
   $ tm "up a b" "nm a b" "      " "19 merge b no ancestor, prompt remove a"
   created new head
   --------------
   test L:up a b R:nm a b W:       - 19 merge b no ancestor, prompt remove a
   --------------
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 0b76e65c8289+, remote: bdb19105162a
   local changed a which remote deleted
   use (c)hanged version or (d)elete? c
    a: prompt keep -> a
    b: versions differ -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: a 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b
   my b@0b76e65c8289+ other b@bdb19105162a ancestor b@000000000000
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@0b76e65c8289+ other rev@bdb19105162a ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
   C a
   --------------
   
   $ tm "up a  " "um a b" "      " "20 merge a and b to b, remove a"
   created new head
   --------------
   test L:up a   R:um a b W:       - 20 merge a and b to b, remove a
   --------------
     searching for copies back to rev 1
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: e300d1c794ec+, remote: 49b6d8032493
    b: remote moved from a -> m
     preserving a for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   removing a
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging a and b to b
   my b@e300d1c794ec+ other b@49b6d8032493 ancestor a@924404dff337
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@e300d1c794ec+ other rev@49b6d8032493 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
     a
   --------------
   
   $ tm "um a b" "up a  " "      " "21 merge a and b to b"
   created new head
   --------------
   test L:um a b R:up a   W:       - 21 merge a and b to b
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 62e7bf090eba+, remote: f4db7e329e71
    b: local copied/moved from a -> m
     preserving b for resolve of b
    rev: versions differ -> m
     preserving rev for resolve of rev
   updating: b 1/2 files (50.00%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b and a to b
   my b@62e7bf090eba+ other a@f4db7e329e71 ancestor a@924404dff337
   updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@62e7bf090eba+ other rev@f4db7e329e71 ancestor rev@924404dff337
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
     a
   --------------
   
 
 m "nm a b" "um x a" "      " "22 get a, keep b"
 
   $ tm "nm a b" "up a c" "      " "23 get c, keep b"
   created new head
   --------------
   test L:nm a b R:up a c W:       - 23 get c, keep b
   --------------
     searching for copies back to rev 1
     unmatched files in local:
      b
     unmatched files in other:
      c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
    ancestor: 924404dff337, local: 02963e448370+, remote: 2b958612230f
+   c: remote created -> g
    b: local copied/moved from a -> m
     preserving b for resolve of b
-   c: remote created -> g
    rev: versions differ -> m
     preserving rev for resolve of rev
   getting c
   updating: c 1/3 files (33.33%)
   updating: b 2/3 files (66.67%)
   picked tool 'python ../merge' for b (binary False symlink False)
   merging b and a to b
   my b@02963e448370+ other a@2b958612230f ancestor a@924404dff337
    premerge successful
   updating: rev 3/3 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@02963e448370+ other rev@2b958612230f ancestor rev@924404dff337
   1 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   --------------
   M b
     a
   M c
   --------------
   
 
   $ cd ..
 
 
 Systematic and terse testing of merge merges and ancestor calculation:
 
 Expected result:
 
 \  a  m1  m2  dst
 0  -   f   f   f   "versions differ"
 1  f   g   g   g   "versions differ"
 2  f   f   f   f   "versions differ"
 3  f   f   g  f+g  "remote copied to " + f
 4  f   f   g   g   "remote moved to " + f
 5  f   g   f  f+g  "local copied to " + f2
 6  f   g   f   g   "local moved to " + f2
 7  -  (f)  f   f   "remote differs from untracked local"
 8  f  (f)  f   f   "remote differs from untracked local"
 
   $ hg init ancestortest
   $ cd ancestortest
   $ for x in 1 2 3 4 5 6 8; do mkdir $x; echo a > $x/f; done
   $ hg ci -Aqm "a"
   $ mkdir 0
   $ touch 0/f
   $ hg mv 1/f 1/g
   $ hg cp 5/f 5/g
   $ hg mv 6/f 6/g
   $ hg rm 8/f
   $ for x in */*; do echo m1 > $x; done
   $ hg ci -Aqm "m1"
   $ hg up -qr0
   $ mkdir 0 7
   $ touch 0/f 7/f
   $ hg mv 1/f 1/g
   $ hg cp 3/f 3/g
   $ hg mv 4/f 4/g
   $ for x in */*; do echo m2 > $x; done
   $ hg ci -Aqm "m2"
   $ hg up -qr1
   $ mkdir 7 8
   $ echo m > 7/f
   $ echo m > 8/f
   $ hg merge -f --tool internal:dump -v --debug -r2 | sed '/^updating:/,$d' 2> /dev/null
     searching for copies back to rev 1
     unmatched files in local:
      5/g
      6/g
     unmatched files in other:
      3/g
      4/g
      7/f
     unmatched files new in both:
      0/f
      1/g
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
      src: '3/f' -> dst: '3/g' *
      src: '4/f' -> dst: '4/g' *
      src: '5/f' -> dst: '5/g' *
      src: '6/f' -> dst: '6/g' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: e6cb3cf11019, local: ec44bf929ab5+, remote: c62e34d0b898
   remote changed 8/f which local deleted
   use (c)hanged version or leave (d)eleted? c
+   8/f: prompt recreating -> g
    0/f: versions differ -> m
     preserving 0/f for resolve of 0/f
    1/g: versions differ -> m
     preserving 1/g for resolve of 1/g
    2/f: versions differ -> m
     preserving 2/f for resolve of 2/f
    3/f: versions differ -> m
     preserving 3/f for resolve of 3/f
    3/g: remote copied from 3/f -> m
     preserving 3/f for resolve of 3/g
    4/g: remote moved from 4/f -> m
     preserving 4/f for resolve of 4/g
    5/f: versions differ -> m
     preserving 5/f for resolve of 5/f
    5/g: local copied/moved from 5/f -> m
     preserving 5/g for resolve of 5/g
    6/g: local copied/moved from 6/f -> m
     preserving 6/g for resolve of 6/g
    7/f: remote differs from untracked local -> m
     preserving 7/f for resolve of 7/f
-   8/f: prompt recreating -> g
   removing 4/f
   getting 8/f
   $ hg mani
   0/f
   1/g
   2/f
   3/f
   4/f
   5/f
   5/g
   6/g
   $ for f in */*; do echo $f:; cat $f; done
   0/f:
   m1
   0/f.base:
   0/f.local:
   m1
   0/f.orig:
   m1
   0/f.other:
   m2
   1/g:
   m1
   1/g.base:
   a
   1/g.local:
   m1
   1/g.orig:
   m1
   1/g.other:
   m2
   2/f:
   m1
   2/f.base:
   a
   2/f.local:
   m1
   2/f.orig:
   m1
   2/f.other:
   m2
   3/f:
   m1
   3/f.base:
   a
   3/f.local:
   m1
   3/f.orig:
   m1
   3/f.other:
   m2
   3/g:
   m1
   3/g.base:
   a
   3/g.local:
   m1
   3/g.orig:
   m1
   3/g.other:
   m2
   4/g:
   m1
   4/g.base:
   a
   4/g.local:
   m1
   4/g.orig:
   m1
   4/g.other:
   m2
   5/f:
   m1
   5/f.base:
   a
   5/f.local:
   m1
   5/f.orig:
   m1
   5/f.other:
   m2
   5/g:
   m1
   5/g.base:
   a
   5/g.local:
   m1
   5/g.orig:
   m1
   5/g.other:
   m2
   6/g:
   m1
   6/g.base:
   a
   6/g.local:
   m1
   6/g.orig:
   m1
   6/g.other:
   m2
   7/f:
   m
   7/f.base:
   7/f.local:
   m
   7/f.orig:
   m
   7/f.other:
   m2
   8/f:
   m2
   $ cd ..

tests/test-up-local-change.t

@@ -1,241 +1,241 b''
   $ HGMERGE=true; export HGMERGE
 
   $ hg init r1
   $ cd r1
   $ echo a > a
   $ hg addremove
   adding a
   $ hg commit -m "1"
 
   $ hg clone . ../r2
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ../r2
   $ hg up
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo abc > a
   $ hg diff --nodates
   diff -r c19d34741b0a a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -a
   +abc
 
   $ cd ../r1
   $ echo b > b
   $ echo a2 > a
   $ hg addremove
   adding b
   $ hg commit -m "2"
 
   $ cd ../r2
   $ hg -q pull ../r1
   $ hg status
   M a
   $ hg parents
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   $ hg --debug up
     searching for copies back to rev 1
     unmatched files in other:
      b
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: c19d34741b0a, local: c19d34741b0a+, remote: 1e71731e6fbb
+   b: remote created -> g
    a: versions differ -> m
     preserving a for resolve of a
-   b: remote created -> g
   getting b
   updating: b 1/2 files (50.00%)
   updating: a 2/2 files (100.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@c19d34741b0a+ other a@1e71731e6fbb ancestor a@c19d34741b0a
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   $ hg parents
   changeset:   1:1e71731e6fbb
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg --debug up 0
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: 1e71731e6fbb, local: 1e71731e6fbb+, remote: c19d34741b0a
    b: other deleted -> r
    a: versions differ -> m
     preserving a for resolve of a
   removing b
   updating: b 1/2 files (50.00%)
   updating: a 2/2 files (100.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@1e71731e6fbb+ other a@c19d34741b0a ancestor a@1e71731e6fbb
   0 files updated, 1 files merged, 1 files removed, 0 files unresolved
   $ hg parents
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   $ hg --debug merge
   abort: nothing to merge
   (use 'hg update' instead)
   [255]
   $ hg parents
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   $ hg --debug up
     searching for copies back to rev 1
     unmatched files in other:
      b
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: c19d34741b0a, local: c19d34741b0a+, remote: 1e71731e6fbb
+   b: remote created -> g
    a: versions differ -> m
     preserving a for resolve of a
-   b: remote created -> g
   getting b
   updating: b 1/2 files (50.00%)
   updating: a 2/2 files (100.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@c19d34741b0a+ other a@1e71731e6fbb ancestor a@c19d34741b0a
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   $ hg parents
   changeset:   1:1e71731e6fbb
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg -v history
   changeset:   1:1e71731e6fbb
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   files:       a b
   description:
   2
   
   
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   files:       a
   description:
   1
   
   
   $ hg diff --nodates
   diff -r 1e71731e6fbb a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -a2
   +abc
 
 
 create a second head
 
   $ cd ../r1
   $ hg up 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo b2 > b
   $ echo a3 > a
   $ hg addremove
   adding b
   $ hg commit -m "3"
   created new head
 
   $ cd ../r2
   $ hg -q pull ../r1
   $ hg status
   M a
   $ hg parents
   changeset:   1:1e71731e6fbb
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg --debug up
   abort: uncommitted changes
   (commit and merge, or update --clean to discard changes)
   [255]
   $ hg --debug merge
   abort: uncommitted changes
   (use 'hg status' to list changes)
   [255]
   $ hg --debug merge -f
     searching for copies back to rev 1
     unmatched files new in both:
      b
   resolving manifests
    branchmerge: True, force: True, partial: False
    ancestor: c19d34741b0a, local: 1e71731e6fbb+, remote: 83c51d0caff4
    a: versions differ -> m
     preserving a for resolve of a
    b: versions differ -> m
     preserving b for resolve of b
   updating: a 1/2 files (50.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@1e71731e6fbb+ other a@83c51d0caff4 ancestor a@c19d34741b0a
   updating: b 2/2 files (100.00%)
   picked tool 'true' for b (binary False symlink False)
   merging b
   my b@1e71731e6fbb+ other b@83c51d0caff4 ancestor b@000000000000
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg parents
   changeset:   1:1e71731e6fbb
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   changeset:   2:83c51d0caff4
   tag:         tip
   parent:      0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     3
   
   $ hg diff --nodates
   diff -r 1e71731e6fbb a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -a2
   +abc
 
 
 test a local add
 
   $ cd ..
   $ hg init a
   $ hg init b
   $ echo a > a/a
   $ echo a > b/a
   $ hg --cwd a commit -A -m a
   adding a
   $ cd b
   $ hg add a
   $ hg pull -u ../a
   pulling from ../a
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg st
 
   $ cd ..