url: use open and not url.open for local files (issue3624)

contrib/synthrepo.py

@@ -1,377 +1,377 b''
 # synthrepo.py - repo synthesis
 #
 # Copyright 2012 Facebook
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 '''synthesize structurally interesting change history
 
 This extension is useful for creating a repository with properties
 that are statistically similar to an existing repository. During
 analysis, a simple probability table is constructed from the history
 of an existing repository.  During synthesis, these properties are
 reconstructed.
 
 Properties that are analyzed and synthesized include the following:
 
 - Lines added or removed when an existing file is modified
 - Number and sizes of files added
 - Number of files removed
 - Line lengths
 - Topological distance to parent changeset(s)
 - Probability of a commit being a merge
 - Probability of a newly added file being added to a new directory
 - Interarrival time, and time zone, of commits
 
 A few obvious properties that are not currently handled realistically:
 
 - Merges are treated as regular commits with two parents, which is not
   realistic
 - Modifications are not treated as operations on hunks of lines, but
   as insertions and deletions of randomly chosen single lines
 - Committer ID (always random)
 - Executability of files
 - Symlinks and binary files are ignored
 '''
 
 import bisect, collections, json, os, random, time
-from mercurial import cmdutil, context, patch, scmutil, url, util
+from mercurial import cmdutil, context, patch, scmutil, url, util, hg
 from mercurial.i18n import _
 from mercurial.node import nullrev, nullid
 
 testedwith = 'internal'
 
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 
 newfile = set(('new fi', 'rename', 'copy f', 'copy t'))
 
 def zerodict():
     return collections.defaultdict(lambda: 0)
 
 def roundto(x, k):
     if x > k * 2:
         return int(round(x / float(k)) * k)
     return int(round(x))
 
 def parsegitdiff(lines):
     filename, mar, lineadd, lineremove = None, None, zerodict(), 0
     binary = False
     for line in lines:
         start = line[:6]
         if start == 'diff -':
             if filename:
                 yield filename, mar, lineadd, lineremove, binary
             mar, lineadd, lineremove, binary = 'm', zerodict(), 0, False
             filename = patch.gitre.match(line).group(1)
         elif start in newfile:
             mar = 'a'
         elif start == 'GIT bi':
             binary = True
         elif start == 'delete':
             mar = 'r'
         elif start:
             s = start[0]
             if s == '-' and not line.startswith('--- '):
                 lineremove += 1
             elif s == '+' and not line.startswith('+++ '):
                 lineadd[roundto(len(line) - 1, 5)] += 1
     if filename:
         yield filename, mar, lineadd, lineremove, binary
 
 @command('analyze',
          [('o', 'output', [], _('write output to given file'), _('FILE')),
           ('r', 'rev', [], _('analyze specified revisions'), _('REV'))],
          _('hg analyze'))
 def analyze(ui, repo, *revs, **opts):
     '''create a simple model of a repository to use for later synthesis
 
     This command examines every changeset in the given range (or all
     of history if none are specified) and creates a simple statistical
     model of the history of the repository.
 
     The model is written out to a JSON file, and can be used by
     :hg:`synthesize` to create or augment a repository with synthetic
     commits that have a structure that is statistically similar to the
     analyzed repository.
     '''
 
     revs = list(revs)
     revs.extend(opts['rev'])
     if not revs:
         revs = [':']
 
     output = opts['output']
     if not output:
         output = os.path.basename(repo.root) + '.json'
 
     if output == '-':
         fp = sys.stdout
     else:
         fp = open(output, 'w')
 
     revs = scmutil.revrange(repo, revs)
     revs.sort()
 
     lineschanged = zerodict()
     children = zerodict()
     p1distance = zerodict()
     p2distance = zerodict()
     linesinfilesadded = zerodict()
     fileschanged = zerodict()
     filesadded = zerodict()
     filesremoved = zerodict()
     linelengths = zerodict()
     interarrival = zerodict()
     parents = zerodict()
     dirsadded = zerodict()
     tzoffset = zerodict()
 
     progress = ui.progress
     _analyzing = _('analyzing')
     _changesets = _('changesets')
     _total = len(revs)
 
     for i, rev in enumerate(revs):
         progress(_analyzing, i, unit=_changesets, total=_total)
         ctx = repo[rev]
         pl = ctx.parents()
         pctx = pl[0]
         prev = pctx.rev()
         children[prev] += 1
         p1distance[rev - prev] += 1
         parents[len(pl)] += 1
         tzoffset[ctx.date()[1]] += 1
         if len(pl) > 1:
             p2distance[rev - pl[1].rev()] += 1
         if prev == rev - 1:
             lastctx = pctx
         else:
             lastctx = repo[rev - 1]
         if lastctx.rev() != nullrev:
             interarrival[roundto(ctx.date()[0] - lastctx.date()[0], 300)] += 1
         diff = sum((d.splitlines()
                     for d in ctx.diff(pctx, opts=dict(git=True))), [])
         fileadds, diradds, fileremoves, filechanges = 0, 0, 0, 0
         for filename, mar, lineadd, lineremove, binary in parsegitdiff(diff):
             if binary:
                 continue
             added = sum(lineadd.itervalues(), 0)
             if mar == 'm':
                 if added and lineremove:
                     lineschanged[roundto(added, 5), roundto(lineremove, 5)] += 1
                     filechanges += 1
             elif mar == 'a':
                 fileadds += 1
                 if '/' in filename:
                     filedir = filename.rsplit('/', 1)[0]
                     if filedir not in pctx.dirs():
                         diradds += 1
                 linesinfilesadded[roundto(added, 5)] += 1
             elif mar == 'r':
                 fileremoves += 1
             for length, count in lineadd.iteritems():
                 linelengths[length] += count
         fileschanged[filechanges] += 1
         filesadded[fileadds] += 1
         dirsadded[diradds] += 1
         filesremoved[fileremoves] += 1
 
     invchildren = zerodict()
 
     for rev, count in children.iteritems():
         invchildren[count] += 1
 
     if output != '-':
         ui.status(_('writing output to %s\n') % output)
 
     def pronk(d):
         return sorted(d.iteritems(), key=lambda x: x[1], reverse=True)
 
     json.dump(dict(revs=len(revs),
                    lineschanged=pronk(lineschanged),
                    children=pronk(invchildren),
                    fileschanged=pronk(fileschanged),
                    filesadded=pronk(filesadded),
                    linesinfilesadded=pronk(linesinfilesadded),
                    dirsadded=pronk(dirsadded),
                    filesremoved=pronk(filesremoved),
                    linelengths=pronk(linelengths),
                    parents=pronk(parents),
                    p1distance=pronk(p1distance),
                    p2distance=pronk(p2distance),
                    interarrival=pronk(interarrival),
                    tzoffset=pronk(tzoffset),
                    ),
               fp)
     fp.close()
 
 @command('synthesize',
          [('c', 'count', 0, _('create given number of commits'), _('COUNT')),
           ('', 'dict', '', _('path to a dictionary of words'), _('FILE'))],
          _('hg synthesize [OPTION].. DESCFILE'))
 def synthesize(ui, repo, descpath, **opts):
     '''synthesize commits based on a model of an existing repository
 
     The model must have been generated by :hg:`analyze`. Commits will
     be generated randomly according to the probabilities described in
     the model.
 
     When synthesizing new content, commit descriptions, and user
     names, words will be chosen randomly from a dictionary that is
     presumed to contain one word per line. Use --dict to specify the
     path to an alternate dictionary to use.
     '''
     try:
-        fp = url.open(ui, descpath)
+        fp = hg.openpath(ui, descpath)
     except Exception, err:
         raise util.Abort('%s: %s' % (descpath, err[0].strerror))
     desc = json.load(fp)
     fp.close()
 
     def cdf(l):
         vals, probs = zip(*sorted(l, key=lambda x: x[1], reverse=True))
         t = float(sum(probs, 0))
         s, cdfs = 0, []
         for v in probs:
             s += v
             cdfs.append(s / t)
         return vals, cdfs
 
     lineschanged = cdf(desc['lineschanged'])
     fileschanged = cdf(desc['fileschanged'])
     filesadded = cdf(desc['filesadded'])
     dirsadded = cdf(desc['dirsadded'])
     filesremoved = cdf(desc['filesremoved'])
     linelengths = cdf(desc['linelengths'])
     parents = cdf(desc['parents'])
     p1distance = cdf(desc['p1distance'])
     p2distance = cdf(desc['p2distance'])
     interarrival = cdf(desc['interarrival'])
     linesinfilesadded = cdf(desc['linesinfilesadded'])
     tzoffset = cdf(desc['tzoffset'])
 
     dictfile = opts.get('dict') or '/usr/share/dict/words'
     try:
         fp = open(dictfile, 'rU')
     except IOError, err:
         raise util.Abort('%s: %s' % (dictfile, err.strerror))
     words = fp.read().splitlines()
     fp.close()
 
     def pick(cdf):
         return cdf[0][bisect.bisect_left(cdf[1], random.random())]
 
     def makeline(minimum=0):
         total = max(minimum, pick(linelengths))
         c, l = 0, []
         while c < total:
             w = random.choice(words)
             c += len(w) + 1
             l.append(w)
         return ' '.join(l)
 
     wlock = repo.wlock()
     lock = repo.lock()
 
     nevertouch = set(('.hgsub', '.hgignore', '.hgtags'))
 
     progress = ui.progress
     _synthesizing = _('synthesizing')
     _changesets = _('changesets')
 
     count = int(opts['count'])
     heads = set(map(repo.changelog.rev, repo.heads()))
     for i in xrange(count):
         progress(_synthesizing, i, unit=_changesets, total=count)
 
         node = repo.changelog.node
         revs = len(repo)
 
         def pickhead(heads, distance):
             if heads:
                 lheads = sorted(heads)
                 rev = revs - min(pick(distance), revs)
                 if rev < lheads[-1]:
                     rev = lheads[bisect.bisect_left(lheads, rev)]
                 else:
                     rev = lheads[-1]
                 return rev, node(rev)
             return nullrev, nullid
 
         r1 = revs - min(pick(p1distance), revs)
         p1 = node(r1)
 
         # the number of heads will grow without bound if we use a pure
         # model, so artificially constrain their proliferation
         if pick(parents) == 2 or len(heads) > random.randint(1, 20):
             r2, p2 = pickhead(heads.difference([r1]), p2distance)
         else:
             r2, p2 = nullrev, nullid
 
         pl = [p1, p2]
         pctx = repo[r1]
         mf = pctx.manifest()
         mfk = mf.keys()
         changes = {}
         if mfk:
             for __ in xrange(pick(fileschanged)):
                 for __ in xrange(10):
                     fctx = pctx.filectx(random.choice(mfk))
                     path = fctx.path()
                     if not (path in nevertouch or fctx.isbinary() or
                             'l' in fctx.flags()):
                         break
                 lines = fctx.data().splitlines()
                 add, remove = pick(lineschanged)
                 for __ in xrange(remove):
                     if not lines:
                         break
                     del lines[random.randrange(0, len(lines))]
                 for __ in xrange(add):
                     lines.insert(random.randint(0, len(lines)), makeline())
                 path = fctx.path()
                 changes[path] = context.memfilectx(path,
                                                    '\n'.join(lines) + '\n')
             for __ in xrange(pick(filesremoved)):
                 path = random.choice(mfk)
                 for __ in xrange(10):
                     path = random.choice(mfk)
                     if path not in changes:
                         changes[path] = None
                         break
         if filesadded:
             dirs = list(pctx.dirs())
             dirs.append('')
         for __ in xrange(pick(filesadded)):
             path = [random.choice(dirs)]
             if pick(dirsadded):
                 path.append(random.choice(words))
             path.append(random.choice(words))
             path = '/'.join(filter(None, path))
             data = '\n'.join(makeline()
                              for __ in xrange(pick(linesinfilesadded))) + '\n'
             changes[path] = context.memfilectx(path, data)
         def filectxfn(repo, memctx, path):
             data = changes[path]
             if data is None:
                 raise IOError
             return data
         if not changes:
             continue
         if revs:
             date = repo['tip'].date()[0] + pick(interarrival)
         else:
             date = time.time() - (86400 * count)
         user = random.choice(words) + '@' + random.choice(words)
         mc = context.memctx(repo, pl, makeline(minimum=2),
                             sorted(changes.iterkeys()),
                             filectxfn, user, '%d %d' % (date, pick(tzoffset)))
         newnode = mc.commit()
         heads.add(repo.changelog.rev(newnode))
         heads.discard(r1)
         heads.discard(r2)
 
     lock.release()
     wlock.release()

hgext/mq.py

@@ -1,3606 +1,3606 b''
 # mq.py - patch queues for mercurial
 #
 # Copyright 2005, 2006 Chris Mason <[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.
 
 '''manage a stack of patches
 
 This extension lets you work with a stack of patches in a Mercurial
 repository. It manages two stacks of patches - all known patches, and
 applied patches (subset of known patches).
 
 Known patches are represented as patch files in the .hg/patches
 directory. Applied patches are both patch files and changesets.
 
 Common tasks (use :hg:`help command` for more details)::
 
   create new patch                          qnew
   import existing patch                     qimport
 
   print patch series                        qseries
   print applied patches                     qapplied
 
   add known patch to applied stack          qpush
   remove patch from applied stack           qpop
   refresh contents of top applied patch     qrefresh
 
 By default, mq will automatically use git patches when required to
 avoid losing file mode changes, copy records, binary files or empty
 files creations or deletions. This behaviour can be configured with::
 
   [mq]
   git = auto/keep/yes/no
 
 If set to 'keep', mq will obey the [diff] section configuration while
 preserving existing git patches upon qrefresh. If set to 'yes' or
 'no', mq will override the [diff] section and always generate git or
 regular patches, possibly losing data in the second case.
 
 It may be desirable for mq changesets to be kept in the secret phase (see
 :hg:`help phases`), which can be enabled with the following setting::
 
   [mq]
   secret = True
 
 You will by default be managing a patch queue named "patches". You can
 create other, independent patch queues with the :hg:`qqueue` command.
 
 If the working directory contains uncommitted files, qpush, qpop and
 qgoto abort immediately. If -f/--force is used, the changes are
 discarded. Setting::
 
   [mq]
   keepchanges = True
 
 make them behave as if --keep-changes were passed, and non-conflicting
 local changes will be tolerated and preserved. If incompatible options
 such as -f/--force or --exact are passed, this setting is ignored.
 '''
 
 from mercurial.i18n import _
 from mercurial.node import bin, hex, short, nullid, nullrev
 from mercurial.lock import release
 from mercurial import commands, cmdutil, hg, scmutil, util, revset
-from mercurial import repair, extensions, url, error, phases, bookmarks
+from mercurial import repair, extensions, error, phases, bookmarks
 from mercurial import patch as patchmod
 import os, re, errno, shutil
 
 commands.norepo += " qclone"
 
 seriesopts = [('s', 'summary', None, _('print first line of patch header'))]
 
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 testedwith = 'internal'
 
 # Patch names looks like unix-file names.
 # They must be joinable with queue directory and result in the patch path.
 normname = util.normpath
 
 class statusentry(object):
     def __init__(self, node, name):
         self.node, self.name = node, name
     def __repr__(self):
         return hex(self.node) + ':' + self.name
 
 class patchheader(object):
     def __init__(self, pf, plainmode=False):
         def eatdiff(lines):
             while lines:
                 l = lines[-1]
                 if (l.startswith("diff -") or
                     l.startswith("Index:") or
                     l.startswith("===========")):
                     del lines[-1]
                 else:
                     break
         def eatempty(lines):
             while lines:
                 if not lines[-1].strip():
                     del lines[-1]
                 else:
                     break
 
         message = []
         comments = []
         user = None
         date = None
         parent = None
         format = None
         subject = None
         branch = None
         nodeid = None
         diffstart = 0
 
         for line in file(pf):
             line = line.rstrip()
             if (line.startswith('diff --git')
                 or (diffstart and line.startswith('+++ '))):
                 diffstart = 2
                 break
             diffstart = 0 # reset
             if line.startswith("--- "):
                 diffstart = 1
                 continue
             elif format == "hgpatch":
                 # parse values when importing the result of an hg export
                 if line.startswith("# User "):
                     user = line[7:]
                 elif line.startswith("# Date "):
                     date = line[7:]
                 elif line.startswith("# Parent "):
                     parent = line[9:].lstrip()
                 elif line.startswith("# Branch "):
                     branch = line[9:]
                 elif line.startswith("# Node ID "):
                     nodeid = line[10:]
                 elif not line.startswith("# ") and line:
                     message.append(line)
                     format = None
             elif line == '# HG changeset patch':
                 message = []
                 format = "hgpatch"
             elif (format != "tagdone" and (line.startswith("Subject: ") or
                                            line.startswith("subject: "))):
                 subject = line[9:]
                 format = "tag"
             elif (format != "tagdone" and (line.startswith("From: ") or
                                            line.startswith("from: "))):
                 user = line[6:]
                 format = "tag"
             elif (format != "tagdone" and (line.startswith("Date: ") or
                                            line.startswith("date: "))):
                 date = line[6:]
                 format = "tag"
             elif format == "tag" and line == "":
                 # when looking for tags (subject: from: etc) they
                 # end once you find a blank line in the source
                 format = "tagdone"
             elif message or line:
                 message.append(line)
             comments.append(line)
 
         eatdiff(message)
         eatdiff(comments)
         # Remember the exact starting line of the patch diffs before consuming
         # empty lines, for external use by TortoiseHg and others
         self.diffstartline = len(comments)
         eatempty(message)
         eatempty(comments)
 
         # make sure message isn't empty
         if format and format.startswith("tag") and subject:
             message.insert(0, "")
             message.insert(0, subject)
 
         self.message = message
         self.comments = comments
         self.user = user
         self.date = date
         self.parent = parent
         # nodeid and branch are for external use by TortoiseHg and others
         self.nodeid = nodeid
         self.branch = branch
         self.haspatch = diffstart > 1
         self.plainmode = plainmode
 
     def setuser(self, user):
         if not self.updateheader(['From: ', '# User '], user):
             try:
                 patchheaderat = self.comments.index('# HG changeset patch')
                 self.comments.insert(patchheaderat + 1, '# User ' + user)
             except ValueError:
                 if self.plainmode or self._hasheader(['Date: ']):
                     self.comments = ['From: ' + user] + self.comments
                 else:
                     tmp = ['# HG changeset patch', '# User ' + user, '']
                     self.comments = tmp + self.comments
         self.user = user
 
     def setdate(self, date):
         if not self.updateheader(['Date: ', '# Date '], date):
             try:
                 patchheaderat = self.comments.index('# HG changeset patch')
                 self.comments.insert(patchheaderat + 1, '# Date ' + date)
             except ValueError:
                 if self.plainmode or self._hasheader(['From: ']):
                     self.comments = ['Date: ' + date] + self.comments
                 else:
                     tmp = ['# HG changeset patch', '# Date ' + date, '']
                     self.comments = tmp + self.comments
         self.date = date
 
     def setparent(self, parent):
         if not self.updateheader(['# Parent '], parent):
             try:
                 patchheaderat = self.comments.index('# HG changeset patch')
                 self.comments.insert(patchheaderat + 1, '# Parent ' + parent)
             except ValueError:
                 pass
         self.parent = parent
 
     def setmessage(self, message):
         if self.comments:
             self._delmsg()
         self.message = [message]
         self.comments += self.message
 
     def updateheader(self, prefixes, new):
         '''Update all references to a field in the patch header.
         Return whether the field is present.'''
         res = False
         for prefix in prefixes:
             for i in xrange(len(self.comments)):
                 if self.comments[i].startswith(prefix):
                     self.comments[i] = prefix + new
                     res = True
                     break
         return res
 
     def _hasheader(self, prefixes):
         '''Check if a header starts with any of the given prefixes.'''
         for prefix in prefixes:
             for comment in self.comments:
                 if comment.startswith(prefix):
                     return True
         return False
 
     def __str__(self):
         if not self.comments:
             return ''
         return '\n'.join(self.comments) + '\n\n'
 
     def _delmsg(self):
         '''Remove existing message, keeping the rest of the comments fields.
         If comments contains 'subject: ', message will prepend
         the field and a blank line.'''
         if self.message:
             subj = 'subject: ' + self.message[0].lower()
             for i in xrange(len(self.comments)):
                 if subj == self.comments[i].lower():
                     del self.comments[i]
                     self.message = self.message[2:]
                     break
         ci = 0
         for mi in self.message:
             while mi != self.comments[ci]:
                 ci += 1
             del self.comments[ci]
 
 def newcommit(repo, phase, *args, **kwargs):
     """helper dedicated to ensure a commit respect mq.secret setting
 
     It should be used instead of repo.commit inside the mq source for operation
     creating new changeset.
     """
     if phase is None:
         if repo.ui.configbool('mq', 'secret', False):
             phase = phases.secret
     if phase is not None:
         backup = repo.ui.backupconfig('phases', 'new-commit')
     # Marking the repository as committing an mq patch can be used
     # to optimize operations like _branchtags().
     repo._committingpatch = True
     try:
         if phase is not None:
             repo.ui.setconfig('phases', 'new-commit', phase)
         return repo.commit(*args, **kwargs)
     finally:
         repo._committingpatch = False
         if phase is not None:
             repo.ui.restoreconfig(backup)
 
 class AbortNoCleanup(error.Abort):
     pass
 
 class queue(object):
     def __init__(self, ui, path, patchdir=None):
         self.basepath = path
         try:
             fh = open(os.path.join(path, 'patches.queue'))
             cur = fh.read().rstrip()
             fh.close()
             if not cur:
                 curpath = os.path.join(path, 'patches')
             else:
                 curpath = os.path.join(path, 'patches-' + cur)
         except IOError:
             curpath = os.path.join(path, 'patches')
         self.path = patchdir or curpath
         self.opener = scmutil.opener(self.path)
         self.ui = ui
         self.applieddirty = False
         self.seriesdirty = False
         self.added = []
         self.seriespath = "series"
         self.statuspath = "status"
         self.guardspath = "guards"
         self.activeguards = None
         self.guardsdirty = False
         # Handle mq.git as a bool with extended values
         try:
             gitmode = ui.configbool('mq', 'git', None)
             if gitmode is None:
                 raise error.ConfigError
             self.gitmode = gitmode and 'yes' or 'no'
         except error.ConfigError:
             self.gitmode = ui.config('mq', 'git', 'auto').lower()
         self.plainmode = ui.configbool('mq', 'plain', False)
 
     @util.propertycache
     def applied(self):
         def parselines(lines):
             for l in lines:
                 entry = l.split(':', 1)
                 if len(entry) > 1:
                     n, name = entry
                     yield statusentry(bin(n), name)
                 elif l.strip():
                     self.ui.warn(_('malformated mq status line: %s\n') % entry)
                 # else we ignore empty lines
         try:
             lines = self.opener.read(self.statuspath).splitlines()
             return list(parselines(lines))
         except IOError, e:
             if e.errno == errno.ENOENT:
                 return []
             raise
 
     @util.propertycache
     def fullseries(self):
         try:
             return self.opener.read(self.seriespath).splitlines()
         except IOError, e:
             if e.errno == errno.ENOENT:
                 return []
             raise
 
     @util.propertycache
     def series(self):
         self.parseseries()
         return self.series
 
     @util.propertycache
     def seriesguards(self):
         self.parseseries()
         return self.seriesguards
 
     def invalidate(self):
         for a in 'applied fullseries series seriesguards'.split():
             if a in self.__dict__:
                 delattr(self, a)
         self.applieddirty = False
         self.seriesdirty = False
         self.guardsdirty = False
         self.activeguards = None
 
     def diffopts(self, opts={}, patchfn=None):
         diffopts = patchmod.diffopts(self.ui, opts)
         if self.gitmode == 'auto':
             diffopts.upgrade = True
         elif self.gitmode == 'keep':
             pass
         elif self.gitmode in ('yes', 'no'):
             diffopts.git = self.gitmode == 'yes'
         else:
             raise util.Abort(_('mq.git option can be auto/keep/yes/no'
                                ' got %s') % self.gitmode)
         if patchfn:
             diffopts = self.patchopts(diffopts, patchfn)
         return diffopts
 
     def patchopts(self, diffopts, *patches):
         """Return a copy of input diff options with git set to true if
         referenced patch is a git patch and should be preserved as such.
         """
         diffopts = diffopts.copy()
         if not diffopts.git and self.gitmode == 'keep':
             for patchfn in patches:
                 patchf = self.opener(patchfn, 'r')
                 # if the patch was a git patch, refresh it as a git patch
                 for line in patchf:
                     if line.startswith('diff --git'):
                         diffopts.git = True
                         break
                 patchf.close()
         return diffopts
 
     def join(self, *p):
         return os.path.join(self.path, *p)
 
     def findseries(self, patch):
         def matchpatch(l):
             l = l.split('#', 1)[0]
             return l.strip() == patch
         for index, l in enumerate(self.fullseries):
             if matchpatch(l):
                 return index
         return None
 
     guard_re = re.compile(r'\s?#([-+][^-+# \t\r\n\f][^# \t\r\n\f]*)')
 
     def parseseries(self):
         self.series = []
         self.seriesguards = []
         for l in self.fullseries:
             h = l.find('#')
             if h == -1:
                 patch = l
                 comment = ''
             elif h == 0:
                 continue
             else:
                 patch = l[:h]
                 comment = l[h:]
             patch = patch.strip()
             if patch:
                 if patch in self.series:
                     raise util.Abort(_('%s appears more than once in %s') %
                                      (patch, self.join(self.seriespath)))
                 self.series.append(patch)
                 self.seriesguards.append(self.guard_re.findall(comment))
 
     def checkguard(self, guard):
         if not guard:
             return _('guard cannot be an empty string')
         bad_chars = '# \t\r\n\f'
         first = guard[0]
         if first in '-+':
             return (_('guard %r starts with invalid character: %r') %
                       (guard, first))
         for c in bad_chars:
             if c in guard:
                 return _('invalid character in guard %r: %r') % (guard, c)
 
     def setactive(self, guards):
         for guard in guards:
             bad = self.checkguard(guard)
             if bad:
                 raise util.Abort(bad)
         guards = sorted(set(guards))
         self.ui.debug('active guards: %s\n' % ' '.join(guards))
         self.activeguards = guards
         self.guardsdirty = True
 
     def active(self):
         if self.activeguards is None:
             self.activeguards = []
             try:
                 guards = self.opener.read(self.guardspath).split()
             except IOError, err:
                 if err.errno != errno.ENOENT:
                     raise
                 guards = []
             for i, guard in enumerate(guards):
                 bad = self.checkguard(guard)
                 if bad:
                     self.ui.warn('%s:%d: %s\n' %
                                  (self.join(self.guardspath), i + 1, bad))
                 else:
                     self.activeguards.append(guard)
         return self.activeguards
 
     def setguards(self, idx, guards):
         for g in guards:
             if len(g) < 2:
                 raise util.Abort(_('guard %r too short') % g)
             if g[0] not in '-+':
                 raise util.Abort(_('guard %r starts with invalid char') % g)
             bad = self.checkguard(g[1:])
             if bad:
                 raise util.Abort(bad)
         drop = self.guard_re.sub('', self.fullseries[idx])
         self.fullseries[idx] = drop + ''.join([' #' + g for g in guards])
         self.parseseries()
         self.seriesdirty = True
 
     def pushable(self, idx):
         if isinstance(idx, str):
             idx = self.series.index(idx)
         patchguards = self.seriesguards[idx]
         if not patchguards:
             return True, None
         guards = self.active()
         exactneg = [g for g in patchguards if g[0] == '-' and g[1:] in guards]
         if exactneg:
             return False, repr(exactneg[0])
         pos = [g for g in patchguards if g[0] == '+']
         exactpos = [g for g in pos if g[1:] in guards]
         if pos:
             if exactpos:
                 return True, repr(exactpos[0])
             return False, ' '.join(map(repr, pos))
         return True, ''
 
     def explainpushable(self, idx, all_patches=False):
         write = all_patches and self.ui.write or self.ui.warn
         if all_patches or self.ui.verbose:
             if isinstance(idx, str):
                 idx = self.series.index(idx)
             pushable, why = self.pushable(idx)
             if all_patches and pushable:
                 if why is None:
                     write(_('allowing %s - no guards in effect\n') %
                           self.series[idx])
                 else:
                     if not why:
                         write(_('allowing %s - no matching negative guards\n') %
                               self.series[idx])
                     else:
                         write(_('allowing %s - guarded by %s\n') %
                               (self.series[idx], why))
             if not pushable:
                 if why:
                     write(_('skipping %s - guarded by %s\n') %
                           (self.series[idx], why))
                 else:
                     write(_('skipping %s - no matching guards\n') %
                           self.series[idx])
 
     def savedirty(self):
         def writelist(items, path):
             fp = self.opener(path, 'w')
             for i in items:
                 fp.write("%s\n" % i)
             fp.close()
         if self.applieddirty:
             writelist(map(str, self.applied), self.statuspath)
             self.applieddirty = False
         if self.seriesdirty:
             writelist(self.fullseries, self.seriespath)
             self.seriesdirty = False
         if self.guardsdirty:
             writelist(self.activeguards, self.guardspath)
             self.guardsdirty = False
         if self.added:
             qrepo = self.qrepo()
             if qrepo:
                 qrepo[None].add(f for f in self.added if f not in qrepo[None])
             self.added = []
 
     def removeundo(self, repo):
         undo = repo.sjoin('undo')
         if not os.path.exists(undo):
             return
         try:
             os.unlink(undo)
         except OSError, inst:
             self.ui.warn(_('error removing undo: %s\n') % str(inst))
 
     def backup(self, repo, files, copy=False):
         # backup local changes in --force case
         for f in sorted(files):
             absf = repo.wjoin(f)
             if os.path.lexists(absf):
                 self.ui.note(_('saving current version of %s as %s\n') %
                              (f, f + '.orig'))
                 if copy:
                     util.copyfile(absf, absf + '.orig')
                 else:
                     util.rename(absf, absf + '.orig')
 
     def printdiff(self, repo, diffopts, node1, node2=None, files=None,
                   fp=None, changes=None, opts={}):
         stat = opts.get('stat')
         m = scmutil.match(repo[node1], files, opts)
         cmdutil.diffordiffstat(self.ui, repo, diffopts, node1, node2,  m,
                                changes, stat, fp)
 
     def mergeone(self, repo, mergeq, head, patch, rev, diffopts):
         # first try just applying the patch
         (err, n) = self.apply(repo, [patch], update_status=False,
                               strict=True, merge=rev)
 
         if err == 0:
             return (err, n)
 
         if n is None:
             raise util.Abort(_("apply failed for patch %s") % patch)
 
         self.ui.warn(_("patch didn't work out, merging %s\n") % patch)
 
         # apply failed, strip away that rev and merge.
         hg.clean(repo, head)
         self.strip(repo, [n], update=False, backup='strip')
 
         ctx = repo[rev]
         ret = hg.merge(repo, rev)
         if ret:
             raise util.Abort(_("update returned %d") % ret)
         n = newcommit(repo, None, ctx.description(), ctx.user(), force=True)
         if n is None:
             raise util.Abort(_("repo commit failed"))
         try:
             ph = patchheader(mergeq.join(patch), self.plainmode)
         except Exception:
             raise util.Abort(_("unable to read %s") % patch)
 
         diffopts = self.patchopts(diffopts, patch)
         patchf = self.opener(patch, "w")
         comments = str(ph)
         if comments:
             patchf.write(comments)
         self.printdiff(repo, diffopts, head, n, fp=patchf)
         patchf.close()
         self.removeundo(repo)
         return (0, n)
 
     def qparents(self, repo, rev=None):
         if rev is None:
             (p1, p2) = repo.dirstate.parents()
             if p2 == nullid:
                 return p1
             if not self.applied:
                 return None
             return self.applied[-1].node
         p1, p2 = repo.changelog.parents(rev)
         if p2 != nullid and p2 in [x.node for x in self.applied]:
             return p2
         return p1
 
     def mergepatch(self, repo, mergeq, series, diffopts):
         if not self.applied:
             # each of the patches merged in will have two parents.  This
             # can confuse the qrefresh, qdiff, and strip code because it
             # needs to know which parent is actually in the patch queue.
             # so, we insert a merge marker with only one parent.  This way
             # the first patch in the queue is never a merge patch
             #
             pname = ".hg.patches.merge.marker"
             n = newcommit(repo, None, '[mq]: merge marker', force=True)
             self.removeundo(repo)
             self.applied.append(statusentry(n, pname))
             self.applieddirty = True
 
         head = self.qparents(repo)
 
         for patch in series:
             patch = mergeq.lookup(patch, strict=True)
             if not patch:
                 self.ui.warn(_("patch %s does not exist\n") % patch)
                 return (1, None)
             pushable, reason = self.pushable(patch)
             if not pushable:
                 self.explainpushable(patch, all_patches=True)
                 continue
             info = mergeq.isapplied(patch)
             if not info:
                 self.ui.warn(_("patch %s is not applied\n") % patch)
                 return (1, None)
             rev = info[1]
             err, head = self.mergeone(repo, mergeq, head, patch, rev, diffopts)
             if head:
                 self.applied.append(statusentry(head, patch))
                 self.applieddirty = True
             if err:
                 return (err, head)
         self.savedirty()
         return (0, head)
 
     def patch(self, repo, patchfile):
         '''Apply patchfile  to the working directory.
         patchfile: name of patch file'''
         files = set()
         try:
             fuzz = patchmod.patch(self.ui, repo, patchfile, strip=1,
                                   files=files, eolmode=None)
             return (True, list(files), fuzz)
         except Exception, inst:
             self.ui.note(str(inst) + '\n')
             if not self.ui.verbose:
                 self.ui.warn(_("patch failed, unable to continue (try -v)\n"))
             self.ui.traceback()
             return (False, list(files), False)
 
     def apply(self, repo, series, list=False, update_status=True,
               strict=False, patchdir=None, merge=None, all_files=None,
               tobackup=None, keepchanges=False):
         wlock = lock = tr = None
         try:
             wlock = repo.wlock()
             lock = repo.lock()
             tr = repo.transaction("qpush")
             try:
                 ret = self._apply(repo, series, list, update_status,
                                   strict, patchdir, merge, all_files=all_files,
                                   tobackup=tobackup, keepchanges=keepchanges)
                 tr.close()
                 self.savedirty()
                 return ret
             except AbortNoCleanup:
                 tr.close()
                 self.savedirty()
                 return 2, repo.dirstate.p1()
             except: # re-raises
                 try:
                     tr.abort()
                 finally:
                     repo.invalidate()
                     repo.dirstate.invalidate()
                     self.invalidate()
                 raise
         finally:
             release(tr, lock, wlock)
             self.removeundo(repo)
 
     def _apply(self, repo, series, list=False, update_status=True,
                strict=False, patchdir=None, merge=None, all_files=None,
                tobackup=None, keepchanges=False):
         """returns (error, hash)
 
         error = 1 for unable to read, 2 for patch failed, 3 for patch
         fuzz. tobackup is None or a set of files to backup before they
         are modified by a patch.
         """
         # TODO unify with commands.py
         if not patchdir:
             patchdir = self.path
         err = 0
         n = None
         for patchname in series:
             pushable, reason = self.pushable(patchname)
             if not pushable:
                 self.explainpushable(patchname, all_patches=True)
                 continue
             self.ui.status(_("applying %s\n") % patchname)
             pf = os.path.join(patchdir, patchname)
 
             try:
                 ph = patchheader(self.join(patchname), self.plainmode)
             except IOError:
                 self.ui.warn(_("unable to read %s\n") % patchname)
                 err = 1
                 break
 
             message = ph.message
             if not message:
                 # The commit message should not be translated
                 message = "imported patch %s\n" % patchname
             else:
                 if list:
                     # The commit message should not be translated
                     message.append("\nimported patch %s" % patchname)
                 message = '\n'.join(message)
 
             if ph.haspatch:
                 if tobackup:
                     touched = patchmod.changedfiles(self.ui, repo, pf)
                     touched = set(touched) & tobackup
                     if touched and keepchanges:
                         raise AbortNoCleanup(
                             _("local changes found, refresh first"))
                     self.backup(repo, touched, copy=True)
                     tobackup = tobackup - touched
                 (patcherr, files, fuzz) = self.patch(repo, pf)
                 if all_files is not None:
                     all_files.update(files)
                 patcherr = not patcherr
             else:
                 self.ui.warn(_("patch %s is empty\n") % patchname)
                 patcherr, files, fuzz = 0, [], 0
 
             if merge and files:
                 # Mark as removed/merged and update dirstate parent info
                 removed = []
                 merged = []
                 for f in files:
                     if os.path.lexists(repo.wjoin(f)):
                         merged.append(f)
                     else:
                         removed.append(f)
                 for f in removed:
                     repo.dirstate.remove(f)
                 for f in merged:
                     repo.dirstate.merge(f)
                 p1, p2 = repo.dirstate.parents()
                 repo.setparents(p1, merge)
 
             match = scmutil.matchfiles(repo, files or [])
             oldtip = repo['tip']
             n = newcommit(repo, None, message, ph.user, ph.date, match=match,
                           force=True)
             if repo['tip'] == oldtip:
                 raise util.Abort(_("qpush exactly duplicates child changeset"))
             if n is None:
                 raise util.Abort(_("repository commit failed"))
 
             if update_status:
                 self.applied.append(statusentry(n, patchname))
 
             if patcherr:
                 self.ui.warn(_("patch failed, rejects left in working dir\n"))
                 err = 2
                 break
 
             if fuzz and strict:
                 self.ui.warn(_("fuzz found when applying patch, stopping\n"))
                 err = 3
                 break
         return (err, n)
 
     def _cleanup(self, patches, numrevs, keep=False):
         if not keep:
             r = self.qrepo()
             if r:
                 r[None].forget(patches)
             for p in patches:
                 os.unlink(self.join(p))
 
         qfinished = []
         if numrevs:
             qfinished = self.applied[:numrevs]
             del self.applied[:numrevs]
             self.applieddirty = True
 
         unknown = []
 
         for (i, p) in sorted([(self.findseries(p), p) for p in patches],
                              reverse=True):
             if i is not None:
                 del self.fullseries[i]
             else:
                 unknown.append(p)
 
         if unknown:
             if numrevs:
                 rev  = dict((entry.name, entry.node) for entry in qfinished)
                 for p in unknown:
                     msg = _('revision %s refers to unknown patches: %s\n')
                     self.ui.warn(msg % (short(rev[p]), p))
             else:
                 msg = _('unknown patches: %s\n')
                 raise util.Abort(''.join(msg % p for p in unknown))
 
         self.parseseries()
         self.seriesdirty = True
         return [entry.node for entry in qfinished]
 
     def _revpatches(self, repo, revs):
         firstrev = repo[self.applied[0].node].rev()
         patches = []
         for i, rev in enumerate(revs):
 
             if rev < firstrev:
                 raise util.Abort(_('revision %d is not managed') % rev)
 
             ctx = repo[rev]
             base = self.applied[i].node
             if ctx.node() != base:
                 msg = _('cannot delete revision %d above applied patches')
                 raise util.Abort(msg % rev)
 
             patch = self.applied[i].name
             for fmt in ('[mq]: %s', 'imported patch %s'):
                 if ctx.description() == fmt % patch:
                     msg = _('patch %s finalized without changeset message\n')
                     repo.ui.status(msg % patch)
                     break
 
             patches.append(patch)
         return patches
 
     def finish(self, repo, revs):
         # Manually trigger phase computation to ensure phasedefaults is
         # executed before we remove the patches.
         repo._phasecache
         patches = self._revpatches(repo, sorted(revs))
         qfinished = self._cleanup(patches, len(patches))
         if qfinished and repo.ui.configbool('mq', 'secret', False):
             # only use this logic when the secret option is added
             oldqbase = repo[qfinished[0]]
             tphase = repo.ui.config('phases', 'new-commit', phases.draft)
             if oldqbase.phase() > tphase and oldqbase.p1().phase() <= tphase:
                 phases.advanceboundary(repo, tphase, qfinished)
 
     def delete(self, repo, patches, opts):
         if not patches and not opts.get('rev'):
             raise util.Abort(_('qdelete requires at least one revision or '
                                'patch name'))
 
         realpatches = []
         for patch in patches:
             patch = self.lookup(patch, strict=True)
             info = self.isapplied(patch)
             if info:
                 raise util.Abort(_("cannot delete applied patch %s") % patch)
             if patch not in self.series:
                 raise util.Abort(_("patch %s not in series file") % patch)
             if patch not in realpatches:
                 realpatches.append(patch)
 
         numrevs = 0
         if opts.get('rev'):
             if not self.applied:
                 raise util.Abort(_('no patches applied'))
             revs = scmutil.revrange(repo, opts.get('rev'))
             if len(revs) > 1 and revs[0] > revs[1]:
                 revs.reverse()
             revpatches = self._revpatches(repo, revs)
             realpatches += revpatches
             numrevs = len(revpatches)
 
         self._cleanup(realpatches, numrevs, opts.get('keep'))
 
     def checktoppatch(self, repo):
         if self.applied:
             top = self.applied[-1].node
             patch = self.applied[-1].name
             pp = repo.dirstate.parents()
             if top not in pp:
                 raise util.Abort(_("working directory revision is not qtip"))
             return top, patch
         return None, None
 
     def checksubstate(self, repo, baserev=None):
         '''return list of subrepos at a different revision than substate.
         Abort if any subrepos have uncommitted changes.'''
         inclsubs = []
         wctx = repo[None]
         if baserev:
             bctx = repo[baserev]
         else:
             bctx = wctx.parents()[0]
         for s in wctx.substate:
             if wctx.sub(s).dirty(True):
                 raise util.Abort(
                     _("uncommitted changes in subrepository %s") % s)
             elif s not in bctx.substate or bctx.sub(s).dirty():
                 inclsubs.append(s)
         return inclsubs
 
     def putsubstate2changes(self, substatestate, changes):
         for files in changes[:3]:
             if '.hgsubstate' in files:
                 return # already listed up
         # not yet listed up
         if substatestate in 'a?':
             changes[1].append('.hgsubstate')
         elif substatestate in 'r':
             changes[2].append('.hgsubstate')
         else: # modified
             changes[0].append('.hgsubstate')
 
     def localchangesfound(self, refresh=True):
         if refresh:
             raise util.Abort(_("local changes found, refresh first"))
         else:
             raise util.Abort(_("local changes found"))
 
     def checklocalchanges(self, repo, force=False, refresh=True):
         m, a, r, d = repo.status()[:4]
         if (m or a or r or d) and not force:
             self.localchangesfound(refresh)
         return m, a, r, d
 
     _reserved = ('series', 'status', 'guards', '.', '..')
     def checkreservedname(self, name):
         if name in self._reserved:
             raise util.Abort(_('"%s" cannot be used as the name of a patch')
                              % name)
         for prefix in ('.hg', '.mq'):
             if name.startswith(prefix):
                 raise util.Abort(_('patch name cannot begin with "%s"')
                                  % prefix)
         for c in ('#', ':'):
             if c in name:
                 raise util.Abort(_('"%s" cannot be used in the name of a patch')
                                  % c)
 
     def checkpatchname(self, name, force=False):
         self.checkreservedname(name)
         if not force and os.path.exists(self.join(name)):
             if os.path.isdir(self.join(name)):
                 raise util.Abort(_('"%s" already exists as a directory')
                                  % name)
             else:
                 raise util.Abort(_('patch "%s" already exists') % name)
 
     def checkkeepchanges(self, keepchanges, force):
         if force and keepchanges:
             raise util.Abort(_('cannot use both --force and --keep-changes'))
 
     def new(self, repo, patchfn, *pats, **opts):
         """options:
            msg: a string or a no-argument function returning a string
         """
         msg = opts.get('msg')
         user = opts.get('user')
         date = opts.get('date')
         if date:
             date = util.parsedate(date)
         diffopts = self.diffopts({'git': opts.get('git')})
         if opts.get('checkname', True):
             self.checkpatchname(patchfn)
         inclsubs = self.checksubstate(repo)
         if inclsubs:
             inclsubs.append('.hgsubstate')
             substatestate = repo.dirstate['.hgsubstate']
         if opts.get('include') or opts.get('exclude') or pats:
             if inclsubs:
                 pats = list(pats or []) + inclsubs
             match = scmutil.match(repo[None], pats, opts)
             # detect missing files in pats
             def badfn(f, msg):
                 if f != '.hgsubstate': # .hgsubstate is auto-created
                     raise util.Abort('%s: %s' % (f, msg))
             match.bad = badfn
             changes = repo.status(match=match)
             m, a, r, d = changes[:4]
         else:
             changes = self.checklocalchanges(repo, force=True)
             m, a, r, d = changes
         match = scmutil.matchfiles(repo, m + a + r + inclsubs)
         if len(repo[None].parents()) > 1:
             raise util.Abort(_('cannot manage merge changesets'))
         commitfiles = m + a + r
         self.checktoppatch(repo)
         insert = self.fullseriesend()
         wlock = repo.wlock()
         try:
             try:
                 # if patch file write fails, abort early
                 p = self.opener(patchfn, "w")
             except IOError, e:
                 raise util.Abort(_('cannot write patch "%s": %s')
                                  % (patchfn, e.strerror))
             try:
                 if self.plainmode:
                     if user:
                         p.write("From: " + user + "\n")
                         if not date:
                             p.write("\n")
                     if date:
                         p.write("Date: %d %d\n\n" % date)
                 else:
                     p.write("# HG changeset patch\n")
                     p.write("# Parent "
                             + hex(repo[None].p1().node()) + "\n")
                     if user:
                         p.write("# User " + user + "\n")
                     if date:
                         p.write("# Date %s %s\n\n" % date)
                 if util.safehasattr(msg, '__call__'):
                     msg = msg()
                 commitmsg = msg and msg or ("[mq]: %s" % patchfn)
                 n = newcommit(repo, None, commitmsg, user, date, match=match,
                               force=True)
                 if n is None:
                     raise util.Abort(_("repo commit failed"))
                 try:
                     self.fullseries[insert:insert] = [patchfn]
                     self.applied.append(statusentry(n, patchfn))
                     self.parseseries()
                     self.seriesdirty = True
                     self.applieddirty = True
                     if msg:
                         msg = msg + "\n\n"
                         p.write(msg)
                     if commitfiles:
                         parent = self.qparents(repo, n)
                         if inclsubs:
                             self.putsubstate2changes(substatestate, changes)
                         chunks = patchmod.diff(repo, node1=parent, node2=n,
                                                changes=changes, opts=diffopts)
                         for chunk in chunks:
                             p.write(chunk)
                     p.close()
                     r = self.qrepo()
                     if r:
                         r[None].add([patchfn])
                 except: # re-raises
                     repo.rollback()
                     raise
             except Exception:
                 patchpath = self.join(patchfn)
                 try:
                     os.unlink(patchpath)
                 except OSError:
                     self.ui.warn(_('error unlinking %s\n') % patchpath)
                 raise
             self.removeundo(repo)
         finally:
             release(wlock)
 
     def strip(self, repo, revs, update=True, backup="all", force=None):
         wlock = lock = None
         try:
             wlock = repo.wlock()
             lock = repo.lock()
 
             if update:
                 self.checklocalchanges(repo, force=force, refresh=False)
                 urev = self.qparents(repo, revs[0])
                 hg.clean(repo, urev)
                 repo.dirstate.write()
 
             repair.strip(self.ui, repo, revs, backup)
         finally:
             release(lock, wlock)
 
     def isapplied(self, patch):
         """returns (index, rev, patch)"""
         for i, a in enumerate(self.applied):
             if a.name == patch:
                 return (i, a.node, a.name)
         return None
 
     # if the exact patch name does not exist, we try a few
     # variations.  If strict is passed, we try only #1
     #
     # 1) a number (as string) to indicate an offset in the series file
     # 2) a unique substring of the patch name was given
     # 3) patchname[-+]num to indicate an offset in the series file
     def lookup(self, patch, strict=False):
         def partialname(s):
             if s in self.series:
                 return s
             matches = [x for x in self.series if s in x]
             if len(matches) > 1:
                 self.ui.warn(_('patch name "%s" is ambiguous:\n') % s)
                 for m in matches:
                     self.ui.warn('  %s\n' % m)
                 return None
             if matches:
                 return matches[0]
             if self.series and self.applied:
                 if s == 'qtip':
                     return self.series[self.seriesend(True)-1]
                 if s == 'qbase':
                     return self.series[0]
             return None
 
         if patch in self.series:
             return patch
 
         if not os.path.isfile(self.join(patch)):
             try:
                 sno = int(patch)
             except (ValueError, OverflowError):
                 pass
             else:
                 if -len(self.series) <= sno < len(self.series):
                     return self.series[sno]
 
             if not strict:
                 res = partialname(patch)
                 if res:
                     return res
                 minus = patch.rfind('-')
                 if minus >= 0:
                     res = partialname(patch[:minus])
                     if res:
                         i = self.series.index(res)
                         try:
                             off = int(patch[minus + 1:] or 1)
                         except (ValueError, OverflowError):
                             pass
                         else:
                             if i - off >= 0:
                                 return self.series[i - off]
                 plus = patch.rfind('+')
                 if plus >= 0:
                     res = partialname(patch[:plus])
                     if res:
                         i = self.series.index(res)
                         try:
                             off = int(patch[plus + 1:] or 1)
                         except (ValueError, OverflowError):
                             pass
                         else:
                             if i + off < len(self.series):
                                 return self.series[i + off]
         raise util.Abort(_("patch %s not in series") % patch)
 
     def push(self, repo, patch=None, force=False, list=False, mergeq=None,
              all=False, move=False, exact=False, nobackup=False,
              keepchanges=False):
         self.checkkeepchanges(keepchanges, force)
         diffopts = self.diffopts()
         wlock = repo.wlock()
         try:
             heads = []
             for b, ls in repo.branchmap().iteritems():
                 heads += ls
             if not heads:
                 heads = [nullid]
             if repo.dirstate.p1() not in heads and not exact:
                 self.ui.status(_("(working directory not at a head)\n"))
 
             if not self.series:
                 self.ui.warn(_('no patches in series\n'))
                 return 0
 
             # Suppose our series file is: A B C and the current 'top'
             # patch is B. qpush C should be performed (moving forward)
             # qpush B is a NOP (no change) qpush A is an error (can't
             # go backwards with qpush)
             if patch:
                 patch = self.lookup(patch)
                 info = self.isapplied(patch)
                 if info and info[0] >= len(self.applied) - 1:
                     self.ui.warn(
                         _('qpush: %s is already at the top\n') % patch)
                     return 0
 
                 pushable, reason = self.pushable(patch)
                 if pushable:
                     if self.series.index(patch) < self.seriesend():
                         raise util.Abort(
                             _("cannot push to a previous patch: %s") % patch)
                 else:
                     if reason:
                         reason = _('guarded by %s') % reason
                     else:
                         reason = _('no matching guards')
                     self.ui.warn(_("cannot push '%s' - %s\n") % (patch, reason))
                     return 1
             elif all:
                 patch = self.series[-1]
                 if self.isapplied(patch):
                     self.ui.warn(_('all patches are currently applied\n'))
                     return 0
 
             # Following the above example, starting at 'top' of B:
             # qpush should be performed (pushes C), but a subsequent
             # qpush without an argument is an error (nothing to
             # apply). This allows a loop of "...while hg qpush..." to
             # work as it detects an error when done
             start = self.seriesend()
             if start == len(self.series):
                 self.ui.warn(_('patch series already fully applied\n'))
                 return 1
             if not force and not keepchanges:
                 self.checklocalchanges(repo, refresh=self.applied)
 
             if exact:
                 if keepchanges:
                     raise util.Abort(
                         _("cannot use --exact and --keep-changes together"))
                 if move:
                     raise util.Abort(_('cannot use --exact and --move '
                                        'together'))
                 if self.applied:
                     raise util.Abort(_('cannot push --exact with applied '
                                        'patches'))
                 root = self.series[start]
                 target = patchheader(self.join(root), self.plainmode).parent
                 if not target:
                     raise util.Abort(
                         _("%s does not have a parent recorded") % root)
                 if not repo[target] == repo['.']:
                     hg.update(repo, target)
 
             if move:
                 if not patch:
                     raise util.Abort(_("please specify the patch to move"))
                 for fullstart, rpn in enumerate(self.fullseries):
                     # strip markers for patch guards
                     if self.guard_re.split(rpn, 1)[0] == self.series[start]:
                         break
                 for i, rpn in enumerate(self.fullseries[fullstart:]):
                     # strip markers for patch guards
                     if self.guard_re.split(rpn, 1)[0] == patch:
                         break
                 index = fullstart + i
                 assert index < len(self.fullseries)
                 fullpatch = self.fullseries[index]
                 del self.fullseries[index]
                 self.fullseries.insert(fullstart, fullpatch)
                 self.parseseries()
                 self.seriesdirty = True
 
             self.applieddirty = True
             if start > 0:
                 self.checktoppatch(repo)
             if not patch:
                 patch = self.series[start]
                 end = start + 1
             else:
                 end = self.series.index(patch, start) + 1
 
             tobackup = set()
             if (not nobackup and force) or keepchanges:
                 m, a, r, d = self.checklocalchanges(repo, force=True)
                 if keepchanges:
                     tobackup.update(m + a + r + d)
                 else:
                     tobackup.update(m + a)
 
             s = self.series[start:end]
             all_files = set()
             try:
                 if mergeq:
                     ret = self.mergepatch(repo, mergeq, s, diffopts)
                 else:
                     ret = self.apply(repo, s, list, all_files=all_files,
                                      tobackup=tobackup, keepchanges=keepchanges)
             except: # re-raises
                 self.ui.warn(_('cleaning up working directory...'))
                 node = repo.dirstate.p1()
                 hg.revert(repo, node, None)
                 # only remove unknown files that we know we touched or
                 # created while patching
                 for f in all_files:
                     if f not in repo.dirstate:
                         try:
                             util.unlinkpath(repo.wjoin(f))
                         except OSError, inst:
                             if inst.errno != errno.ENOENT:
                                 raise
                 self.ui.warn(_('done\n'))
                 raise
 
             if not self.applied:
                 return ret[0]
             top = self.applied[-1].name
             if ret[0] and ret[0] > 1:
                 msg = _("errors during apply, please fix and refresh %s\n")
                 self.ui.write(msg % top)
             else:
                 self.ui.write(_("now at: %s\n") % top)
             return ret[0]
 
         finally:
             wlock.release()
 
     def pop(self, repo, patch=None, force=False, update=True, all=False,
             nobackup=False, keepchanges=False):
         self.checkkeepchanges(keepchanges, force)
         wlock = repo.wlock()
         try:
             if patch:
                 # index, rev, patch
                 info = self.isapplied(patch)
                 if not info:
                     patch = self.lookup(patch)
                 info = self.isapplied(patch)
                 if not info:
                     raise util.Abort(_("patch %s is not applied") % patch)
 
             if not self.applied:
                 # Allow qpop -a to work repeatedly,
                 # but not qpop without an argument
                 self.ui.warn(_("no patches applied\n"))
                 return not all
 
             if all:
                 start = 0
             elif patch:
                 start = info[0] + 1
             else:
                 start = len(self.applied) - 1
 
             if start >= len(self.applied):
                 self.ui.warn(_("qpop: %s is already at the top\n") % patch)
                 return
 
             if not update:
                 parents = repo.dirstate.parents()
                 rr = [x.node for x in self.applied]
                 for p in parents:
                     if p in rr:
                         self.ui.warn(_("qpop: forcing dirstate update\n"))
                         update = True
             else:
                 parents = [p.node() for p in repo[None].parents()]
                 needupdate = False
                 for entry in self.applied[start:]:
                     if entry.node in parents:
                         needupdate = True
                         break
                 update = needupdate
 
             tobackup = set()
             if update:
                 m, a, r, d = self.checklocalchanges(
                     repo, force=force or keepchanges)
                 if force:
                     if not nobackup:
                         tobackup.update(m + a)
                 elif keepchanges:
                     tobackup.update(m + a + r + d)
 
             self.applieddirty = True
             end = len(self.applied)
             rev = self.applied[start].node
             if update:
                 top = self.checktoppatch(repo)[0]
 
             try:
                 heads = repo.changelog.heads(rev)
             except error.LookupError:
                 node = short(rev)
                 raise util.Abort(_('trying to pop unknown node %s') % node)
 
             if heads != [self.applied[-1].node]:
                 raise util.Abort(_("popping would remove a revision not "
                                    "managed by this patch queue"))
             if not repo[self.applied[-1].node].mutable():
                 raise util.Abort(
                     _("popping would remove an immutable revision"),
                     hint=_('see "hg help phases" for details'))
 
             # we know there are no local changes, so we can make a simplified
             # form of hg.update.
             if update:
                 qp = self.qparents(repo, rev)
                 ctx = repo[qp]
                 m, a, r, d = repo.status(qp, top)[:4]
                 if d:
                     raise util.Abort(_("deletions found between repo revs"))
 
                 tobackup = set(a + m + r) & tobackup
                 if keepchanges and tobackup:
                     self.localchangesfound()
                 self.backup(repo, tobackup)
 
                 for f in a:
                     try:
                         util.unlinkpath(repo.wjoin(f))
                     except OSError, e:
                         if e.errno != errno.ENOENT:
                             raise
                     repo.dirstate.drop(f)
                 for f in m + r:
                     fctx = ctx[f]
                     repo.wwrite(f, fctx.data(), fctx.flags())
                     repo.dirstate.normal(f)
                 repo.setparents(qp, nullid)
             for patch in reversed(self.applied[start:end]):
                 self.ui.status(_("popping %s\n") % patch.name)
             del self.applied[start:end]
             self.strip(repo, [rev], update=False, backup='strip')
             if self.applied:
                 self.ui.write(_("now at: %s\n") % self.applied[-1].name)
             else:
                 self.ui.write(_("patch queue now empty\n"))
         finally:
             wlock.release()
 
     def diff(self, repo, pats, opts):
         top, patch = self.checktoppatch(repo)
         if not top:
             self.ui.write(_("no patches applied\n"))
             return
         qp = self.qparents(repo, top)
         if opts.get('reverse'):
             node1, node2 = None, qp
         else:
             node1, node2 = qp, None
         diffopts = self.diffopts(opts, patch)
         self.printdiff(repo, diffopts, node1, node2, files=pats, opts=opts)
 
     def refresh(self, repo, pats=None, **opts):
         if not self.applied:
             self.ui.write(_("no patches applied\n"))
             return 1
         msg = opts.get('msg', '').rstrip()
         newuser = opts.get('user')
         newdate = opts.get('date')
         if newdate:
             newdate = '%d %d' % util.parsedate(newdate)
         wlock = repo.wlock()
 
         try:
             self.checktoppatch(repo)
             (top, patchfn) = (self.applied[-1].node, self.applied[-1].name)
             if repo.changelog.heads(top) != [top]:
                 raise util.Abort(_("cannot refresh a revision with children"))
             if not repo[top].mutable():
                 raise util.Abort(_("cannot refresh immutable revision"),
                                  hint=_('see "hg help phases" for details'))
 
             cparents = repo.changelog.parents(top)
             patchparent = self.qparents(repo, top)
 
             inclsubs = self.checksubstate(repo, hex(patchparent))
             if inclsubs:
                 inclsubs.append('.hgsubstate')
                 substatestate = repo.dirstate['.hgsubstate']
 
             ph = patchheader(self.join(patchfn), self.plainmode)
             diffopts = self.diffopts({'git': opts.get('git')}, patchfn)
             if msg:
                 ph.setmessage(msg)
             if newuser:
                 ph.setuser(newuser)
             if newdate:
                 ph.setdate(newdate)
             ph.setparent(hex(patchparent))
 
             # only commit new patch when write is complete
             patchf = self.opener(patchfn, 'w', atomictemp=True)
 
             comments = str(ph)
             if comments:
                 patchf.write(comments)
 
             # update the dirstate in place, strip off the qtip commit
             # and then commit.
             #
             # this should really read:
             #   mm, dd, aa = repo.status(top, patchparent)[:3]
             # but we do it backwards to take advantage of manifest/changelog
             # caching against the next repo.status call
             mm, aa, dd = repo.status(patchparent, top)[:3]
             changes = repo.changelog.read(top)
             man = repo.manifest.read(changes[0])
             aaa = aa[:]
             matchfn = scmutil.match(repo[None], pats, opts)
             # in short mode, we only diff the files included in the
             # patch already plus specified files
             if opts.get('short'):
                 # if amending a patch, we start with existing
                 # files plus specified files - unfiltered
                 match = scmutil.matchfiles(repo, mm + aa + dd + matchfn.files())
                 # filter with include/exclude options
                 matchfn = scmutil.match(repo[None], opts=opts)
             else:
                 match = scmutil.matchall(repo)
             m, a, r, d = repo.status(match=match)[:4]
             mm = set(mm)
             aa = set(aa)
             dd = set(dd)
 
             # we might end up with files that were added between
             # qtip and the dirstate parent, but then changed in the
             # local dirstate. in this case, we want them to only
             # show up in the added section
             for x in m:
                 if x not in aa:
                     mm.add(x)
             # we might end up with files added by the local dirstate that
             # were deleted by the patch.  In this case, they should only
             # show up in the changed section.
             for x in a:
                 if x in dd:
                     dd.remove(x)
                     mm.add(x)
                 else:
                     aa.add(x)
             # make sure any files deleted in the local dirstate
             # are not in the add or change column of the patch
             forget = []
             for x in d + r:
                 if x in aa:
                     aa.remove(x)
                     forget.append(x)
                     continue
                 else:
                     mm.discard(x)
                 dd.add(x)
 
             m = list(mm)
             r = list(dd)
             a = list(aa)
             c = [filter(matchfn, l) for l in (m, a, r)]
             match = scmutil.matchfiles(repo, set(c[0] + c[1] + c[2] + inclsubs))
             bmlist = repo[top].bookmarks()
 
             try:
                 if diffopts.git or diffopts.upgrade:
                     copies = {}
                     for dst in a:
                         src = repo.dirstate.copied(dst)
                         # during qfold, the source file for copies may
                         # be removed. Treat this as a simple add.
                         if src is not None and src in repo.dirstate:
                             copies.setdefault(src, []).append(dst)
                         repo.dirstate.add(dst)
                     # remember the copies between patchparent and qtip
                     for dst in aaa:
                         f = repo.file(dst)
                         src = f.renamed(man[dst])
                         if src:
                             copies.setdefault(src[0], []).extend(
                                 copies.get(dst, []))
                             if dst in a:
                                 copies[src[0]].append(dst)
                         # we can't copy a file created by the patch itself
                         if dst in copies:
                             del copies[dst]
                     for src, dsts in copies.iteritems():
                         for dst in dsts:
                             repo.dirstate.copy(src, dst)
                 else:
                     for dst in a:
                         repo.dirstate.add(dst)
                     # Drop useless copy information
                     for f in list(repo.dirstate.copies()):
                         repo.dirstate.copy(None, f)
                 for f in r:
                     repo.dirstate.remove(f)
                 # if the patch excludes a modified file, mark that
                 # file with mtime=0 so status can see it.
                 mm = []
                 for i in xrange(len(m)-1, -1, -1):
                     if not matchfn(m[i]):
                         mm.append(m[i])
                         del m[i]
                 for f in m:
                     repo.dirstate.normal(f)
                 for f in mm:
                     repo.dirstate.normallookup(f)
                 for f in forget:
                     repo.dirstate.drop(f)
 
                 if not msg:
                     if not ph.message:
                         message = "[mq]: %s\n" % patchfn
                     else:
                         message = "\n".join(ph.message)
                 else:
                     message = msg
 
                 user = ph.user or changes[1]
 
                 oldphase = repo[top].phase()
 
                 # assumes strip can roll itself back if interrupted
                 repo.setparents(*cparents)
                 self.applied.pop()
                 self.applieddirty = True
                 self.strip(repo, [top], update=False,
                            backup='strip')
             except: # re-raises
                 repo.dirstate.invalidate()
                 raise
 
             try:
                 # might be nice to attempt to roll back strip after this
 
                 # Ensure we create a new changeset in the same phase than
                 # the old one.
                 n = newcommit(repo, oldphase, message, user, ph.date,
                               match=match, force=True)
                 # only write patch after a successful commit
                 if inclsubs:
                     self.putsubstate2changes(substatestate, c)
                 chunks = patchmod.diff(repo, patchparent,
                                        changes=c, opts=diffopts)
                 for chunk in chunks:
                     patchf.write(chunk)
                 patchf.close()
 
                 for bm in bmlist:
                     repo._bookmarks[bm] = n
                 bookmarks.write(repo)
 
                 self.applied.append(statusentry(n, patchfn))
             except: # re-raises
                 ctx = repo[cparents[0]]
                 repo.dirstate.rebuild(ctx.node(), ctx.manifest())
                 self.savedirty()
                 self.ui.warn(_('refresh interrupted while patch was popped! '
                                '(revert --all, qpush to recover)\n'))
                 raise
         finally:
             wlock.release()
             self.removeundo(repo)
 
     def init(self, repo, create=False):
         if not create and os.path.isdir(self.path):
             raise util.Abort(_("patch queue directory already exists"))
         try:
             os.mkdir(self.path)
         except OSError, inst:
             if inst.errno != errno.EEXIST or not create:
                 raise
         if create:
             return self.qrepo(create=True)
 
     def unapplied(self, repo, patch=None):
         if patch and patch not in self.series:
             raise util.Abort(_("patch %s is not in series file") % patch)
         if not patch:
             start = self.seriesend()
         else:
             start = self.series.index(patch) + 1
         unapplied = []
         for i in xrange(start, len(self.series)):
             pushable, reason = self.pushable(i)
             if pushable:
                 unapplied.append((i, self.series[i]))
             self.explainpushable(i)
         return unapplied
 
     def qseries(self, repo, missing=None, start=0, length=None, status=None,
                 summary=False):
         def displayname(pfx, patchname, state):
             if pfx:
                 self.ui.write(pfx)
             if summary:
                 ph = patchheader(self.join(patchname), self.plainmode)
                 msg = ph.message and ph.message[0] or ''
                 if self.ui.formatted():
                     width = self.ui.termwidth() - len(pfx) - len(patchname) - 2
                     if width > 0:
                         msg = util.ellipsis(msg, width)
                     else:
                         msg = ''
                 self.ui.write(patchname, label='qseries.' + state)
                 self.ui.write(': ')
                 self.ui.write(msg, label='qseries.message.' + state)
             else:
                 self.ui.write(patchname, label='qseries.' + state)
             self.ui.write('\n')
 
         applied = set([p.name for p in self.applied])
         if length is None:
             length = len(self.series) - start
         if not missing:
             if self.ui.verbose:
                 idxwidth = len(str(start + length - 1))
             for i in xrange(start, start + length):
                 patch = self.series[i]
                 if patch in applied:
                     char, state = 'A', 'applied'
                 elif self.pushable(i)[0]:
                     char, state = 'U', 'unapplied'
                 else:
                     char, state = 'G', 'guarded'
                 pfx = ''
                 if self.ui.verbose:
                     pfx = '%*d %s ' % (idxwidth, i, char)
                 elif status and status != char:
                     continue
                 displayname(pfx, patch, state)
         else:
             msng_list = []
             for root, dirs, files in os.walk(self.path):
                 d = root[len(self.path) + 1:]
                 for f in files:
                     fl = os.path.join(d, f)
                     if (fl not in self.series and
                         fl not in (self.statuspath, self.seriespath,
                                    self.guardspath)
                         and not fl.startswith('.')):
                         msng_list.append(fl)
             for x in sorted(msng_list):
                 pfx = self.ui.verbose and ('D ') or ''
                 displayname(pfx, x, 'missing')
 
     def issaveline(self, l):
         if l.name == '.hg.patches.save.line':
             return True
 
     def qrepo(self, create=False):
         ui = self.ui.copy()
         ui.setconfig('paths', 'default', '', overlay=False)
         ui.setconfig('paths', 'default-push', '', overlay=False)
         if create or os.path.isdir(self.join(".hg")):
             return hg.repository(ui, path=self.path, create=create)
 
     def restore(self, repo, rev, delete=None, qupdate=None):
         desc = repo[rev].description().strip()
         lines = desc.splitlines()
         i = 0
         datastart = None
         series = []
         applied = []
         qpp = None
         for i, line in enumerate(lines):
             if line == 'Patch Data:':
                 datastart = i + 1
             elif line.startswith('Dirstate:'):
                 l = line.rstrip()
                 l = l[10:].split(' ')
                 qpp = [bin(x) for x in l]
             elif datastart is not None:
                 l = line.rstrip()
                 n, name = l.split(':', 1)
                 if n:
                     applied.append(statusentry(bin(n), name))
                 else:
                     series.append(l)
         if datastart is None:
             self.ui.warn(_("no saved patch data found\n"))
             return 1
         self.ui.warn(_("restoring status: %s\n") % lines[0])
         self.fullseries = series
         self.applied = applied
         self.parseseries()
         self.seriesdirty = True
         self.applieddirty = True
         heads = repo.changelog.heads()
         if delete:
             if rev not in heads:
                 self.ui.warn(_("save entry has children, leaving it alone\n"))
             else:
                 self.ui.warn(_("removing save entry %s\n") % short(rev))
                 pp = repo.dirstate.parents()
                 if rev in pp:
                     update = True
                 else:
                     update = False
                 self.strip(repo, [rev], update=update, backup='strip')
         if qpp:
             self.ui.warn(_("saved queue repository parents: %s %s\n") %
                          (short(qpp[0]), short(qpp[1])))
             if qupdate:
                 self.ui.status(_("updating queue directory\n"))
                 r = self.qrepo()
                 if not r:
                     self.ui.warn(_("unable to load queue repository\n"))
                     return 1
                 hg.clean(r, qpp[0])
 
     def save(self, repo, msg=None):
         if not self.applied:
             self.ui.warn(_("save: no patches applied, exiting\n"))
             return 1
         if self.issaveline(self.applied[-1]):
             self.ui.warn(_("status is already saved\n"))
             return 1
 
         if not msg:
             msg = _("hg patches saved state")
         else:
             msg = "hg patches: " + msg.rstrip('\r\n')
         r = self.qrepo()
         if r:
             pp = r.dirstate.parents()
             msg += "\nDirstate: %s %s" % (hex(pp[0]), hex(pp[1]))
         msg += "\n\nPatch Data:\n"
         msg += ''.join('%s\n' % x for x in self.applied)
         msg += ''.join(':%s\n' % x for x in self.fullseries)
         n = repo.commit(msg, force=True)
         if not n:
             self.ui.warn(_("repo commit failed\n"))
             return 1
         self.applied.append(statusentry(n, '.hg.patches.save.line'))
         self.applieddirty = True
         self.removeundo(repo)
 
     def fullseriesend(self):
         if self.applied:
             p = self.applied[-1].name
             end = self.findseries(p)
             if end is None:
                 return len(self.fullseries)
             return end + 1
         return 0
 
     def seriesend(self, all_patches=False):
         """If all_patches is False, return the index of the next pushable patch
         in the series, or the series length. If all_patches is True, return the
         index of the first patch past the last applied one.
         """
         end = 0
         def next(start):
             if all_patches or start >= len(self.series):
                 return start
             for i in xrange(start, len(self.series)):
                 p, reason = self.pushable(i)
                 if p:
                     return i
                 self.explainpushable(i)
             return len(self.series)
         if self.applied:
             p = self.applied[-1].name
             try:
                 end = self.series.index(p)
             except ValueError:
                 return 0
             return next(end + 1)
         return next(end)
 
     def appliedname(self, index):
         pname = self.applied[index].name
         if not self.ui.verbose:
             p = pname
         else:
             p = str(self.series.index(pname)) + " " + pname
         return p
 
     def qimport(self, repo, files, patchname=None, rev=None, existing=None,
                 force=None, git=False):
         def checkseries(patchname):
             if patchname in self.series:
                 raise util.Abort(_('patch %s is already in the series file')
                                  % patchname)
 
         if rev:
             if files:
                 raise util.Abort(_('option "-r" not valid when importing '
                                    'files'))
             rev = scmutil.revrange(repo, rev)
             rev.sort(reverse=True)
         elif not files:
             raise util.Abort(_('no files or revisions specified'))
         if (len(files) > 1 or len(rev) > 1) and patchname:
             raise util.Abort(_('option "-n" not valid when importing multiple '
                                'patches'))
         imported = []
         if rev:
             # If mq patches are applied, we can only import revisions
             # that form a linear path to qbase.
             # Otherwise, they should form a linear path to a head.
             heads = repo.changelog.heads(repo.changelog.node(rev[-1]))
             if len(heads) > 1:
                 raise util.Abort(_('revision %d is the root of more than one '
                                    'branch') % rev[-1])
             if self.applied:
                 base = repo.changelog.node(rev[0])
                 if base in [n.node for n in self.applied]:
                     raise util.Abort(_('revision %d is already managed')
                                      % rev[0])
                 if heads != [self.applied[-1].node]:
                     raise util.Abort(_('revision %d is not the parent of '
                                        'the queue') % rev[0])
                 base = repo.changelog.rev(self.applied[0].node)
                 lastparent = repo.changelog.parentrevs(base)[0]
             else:
                 if heads != [repo.changelog.node(rev[0])]:
                     raise util.Abort(_('revision %d has unmanaged children')
                                      % rev[0])
                 lastparent = None
 
             diffopts = self.diffopts({'git': git})
             for r in rev:
                 if not repo[r].mutable():
                     raise util.Abort(_('revision %d is not mutable') % r,
                                      hint=_('see "hg help phases" for details'))
                 p1, p2 = repo.changelog.parentrevs(r)
                 n = repo.changelog.node(r)
                 if p2 != nullrev:
                     raise util.Abort(_('cannot import merge revision %d') % r)
                 if lastparent and lastparent != r:
                     raise util.Abort(_('revision %d is not the parent of %d')
                                      % (r, lastparent))
                 lastparent = p1
 
                 if not patchname:
                     patchname = normname('%d.diff' % r)
                 checkseries(patchname)
                 self.checkpatchname(patchname, force)
                 self.fullseries.insert(0, patchname)
 
                 patchf = self.opener(patchname, "w")
                 cmdutil.export(repo, [n], fp=patchf, opts=diffopts)
                 patchf.close()
 
                 se = statusentry(n, patchname)
                 self.applied.insert(0, se)
 
                 self.added.append(patchname)
                 imported.append(patchname)
                 patchname = None
             if rev and repo.ui.configbool('mq', 'secret', False):
                 # if we added anything with --rev, we must move the secret root
                 phases.retractboundary(repo, phases.secret, [n])
             self.parseseries()
             self.applieddirty = True
             self.seriesdirty = True
 
         for i, filename in enumerate(files):
             if existing:
                 if filename == '-':
                     raise util.Abort(_('-e is incompatible with import from -'))
                 filename = normname(filename)
                 self.checkreservedname(filename)
                 originpath = self.join(filename)
                 if not os.path.isfile(originpath):
                     raise util.Abort(_("patch %s does not exist") % filename)
 
                 if patchname:
                     self.checkpatchname(patchname, force)
 
                     self.ui.write(_('renaming %s to %s\n')
                                         % (filename, patchname))
                     util.rename(originpath, self.join(patchname))
                 else:
                     patchname = filename
 
             else:
                 if filename == '-' and not patchname:
                     raise util.Abort(_('need --name to import a patch from -'))
                 elif not patchname:
                     patchname = normname(os.path.basename(filename.rstrip('/')))
                 self.checkpatchname(patchname, force)
                 try:
                     if filename == '-':
                         text = self.ui.fin.read()
                     else:
-                        fp = url.open(self.ui, filename)
+                        fp = hg.openpath(self.ui, filename)
                         text = fp.read()
                         fp.close()
                 except (OSError, IOError):
                     raise util.Abort(_("unable to read file %s") % filename)
                 patchf = self.opener(patchname, "w")
                 patchf.write(text)
                 patchf.close()
             if not force:
                 checkseries(patchname)
             if patchname not in self.series:
                 index = self.fullseriesend() + i
                 self.fullseries[index:index] = [patchname]
             self.parseseries()
             self.seriesdirty = True
             self.ui.warn(_("adding %s to series file\n") % patchname)
             self.added.append(patchname)
             imported.append(patchname)
             patchname = None
 
         self.removeundo(repo)
         return imported
 
 def fixkeepchangesopts(ui, opts):
     if (not ui.configbool('mq', 'keepchanges') or opts.get('force')
         or opts.get('exact')):
         return opts
     opts = dict(opts)
     opts['keep_changes'] = True
     return opts
 
 @command("qdelete|qremove|qrm",
          [('k', 'keep', None, _('keep patch file')),
           ('r', 'rev', [],
            _('stop managing a revision (DEPRECATED)'), _('REV'))],
          _('hg qdelete [-k] [PATCH]...'))
 def delete(ui, repo, *patches, **opts):
     """remove patches from queue
 
     The patches must not be applied, and at least one patch is required. Exact
     patch identifiers must be given. With -k/--keep, the patch files are
     preserved in the patch directory.
 
     To stop managing a patch and move it into permanent history,
     use the :hg:`qfinish` command."""
     q = repo.mq
     q.delete(repo, patches, opts)
     q.savedirty()
     return 0
 
 @command("qapplied",
          [('1', 'last', None, _('show only the preceding applied patch'))
           ] + seriesopts,
          _('hg qapplied [-1] [-s] [PATCH]'))
 def applied(ui, repo, patch=None, **opts):
     """print the patches already applied
 
     Returns 0 on success."""
 
     q = repo.mq
 
     if patch:
         if patch not in q.series:
             raise util.Abort(_("patch %s is not in series file") % patch)
         end = q.series.index(patch) + 1
     else:
         end = q.seriesend(True)
 
     if opts.get('last') and not end:
         ui.write(_("no patches applied\n"))
         return 1
     elif opts.get('last') and end == 1:
         ui.write(_("only one patch applied\n"))
         return 1
     elif opts.get('last'):
         start = end - 2
         end = 1
     else:
         start = 0
 
     q.qseries(repo, length=end, start=start, status='A',
               summary=opts.get('summary'))
 
 
 @command("qunapplied",
          [('1', 'first', None, _('show only the first patch'))] + seriesopts,
          _('hg qunapplied [-1] [-s] [PATCH]'))
 def unapplied(ui, repo, patch=None, **opts):
     """print the patches not yet applied
 
     Returns 0 on success."""
 
     q = repo.mq
     if patch:
         if patch not in q.series:
             raise util.Abort(_("patch %s is not in series file") % patch)
         start = q.series.index(patch) + 1
     else:
         start = q.seriesend(True)
 
     if start == len(q.series) and opts.get('first'):
         ui.write(_("all patches applied\n"))
         return 1
 
     length = opts.get('first') and 1 or None
     q.qseries(repo, start=start, length=length, status='U',
               summary=opts.get('summary'))
 
 @command("qimport",
          [('e', 'existing', None, _('import file in patch directory')),
           ('n', 'name', '',
            _('name of patch file'), _('NAME')),
           ('f', 'force', None, _('overwrite existing files')),
           ('r', 'rev', [],
            _('place existing revisions under mq control'), _('REV')),
           ('g', 'git', None, _('use git extended diff format')),
           ('P', 'push', None, _('qpush after importing'))],
          _('hg qimport [-e] [-n NAME] [-f] [-g] [-P] [-r REV]... [FILE]...'))
 def qimport(ui, repo, *filename, **opts):
     """import a patch or existing changeset
 
     The patch is inserted into the series after the last applied
     patch. If no patches have been applied, qimport prepends the patch
     to the series.
 
     The patch will have the same name as its source file unless you
     give it a new one with -n/--name.
 
     You can register an existing patch inside the patch directory with
     the -e/--existing flag.
 
     With -f/--force, an existing patch of the same name will be
     overwritten.
 
     An existing changeset may be placed under mq control with -r/--rev
     (e.g. qimport --rev tip -n patch will place tip under mq control).
     With -g/--git, patches imported with --rev will use the git diff
     format. See the diffs help topic for information on why this is
     important for preserving rename/copy information and permission
     changes. Use :hg:`qfinish` to remove changesets from mq control.
 
     To import a patch from standard input, pass - as the patch file.
     When importing from standard input, a patch name must be specified
     using the --name flag.
 
     To import an existing patch while renaming it::
 
       hg qimport -e existing-patch -n new-name
 
     Returns 0 if import succeeded.
     """
     lock = repo.lock() # cause this may move phase
     try:
         q = repo.mq
         try:
             imported = q.qimport(
                 repo, filename, patchname=opts.get('name'),
                 existing=opts.get('existing'), force=opts.get('force'),
                 rev=opts.get('rev'), git=opts.get('git'))
         finally:
             q.savedirty()
     finally:
         lock.release()
 
     if imported and opts.get('push') and not opts.get('rev'):
         return q.push(repo, imported[-1])
     return 0
 
 def qinit(ui, repo, create):
     """initialize a new queue repository
 
     This command also creates a series file for ordering patches, and
     an mq-specific .hgignore file in the queue repository, to exclude
     the status and guards files (these contain mostly transient state).
 
     Returns 0 if initialization succeeded."""
     q = repo.mq
     r = q.init(repo, create)
     q.savedirty()
     if r:
         if not os.path.exists(r.wjoin('.hgignore')):
             fp = r.wopener('.hgignore', 'w')
             fp.write('^\\.hg\n')
             fp.write('^\\.mq\n')
             fp.write('syntax: glob\n')
             fp.write('status\n')
             fp.write('guards\n')
             fp.close()
         if not os.path.exists(r.wjoin('series')):
             r.wopener('series', 'w').close()
         r[None].add(['.hgignore', 'series'])
         commands.add(ui, r)
     return 0
 
 @command("^qinit",
          [('c', 'create-repo', None, _('create queue repository'))],
          _('hg qinit [-c]'))
 def init(ui, repo, **opts):
     """init a new queue repository (DEPRECATED)
 
     The queue repository is unversioned by default. If
     -c/--create-repo is specified, qinit will create a separate nested
     repository for patches (qinit -c may also be run later to convert
     an unversioned patch repository into a versioned one). You can use
     qcommit to commit changes to this queue repository.
 
     This command is deprecated. Without -c, it's implied by other relevant
     commands. With -c, use :hg:`init --mq` instead."""
     return qinit(ui, repo, create=opts.get('create_repo'))
 
 @command("qclone",
          [('', 'pull', None, _('use pull protocol to copy metadata')),
           ('U', 'noupdate', None,
            _('do not update the new working directories')),
           ('', 'uncompressed', None,
            _('use uncompressed transfer (fast over LAN)')),
           ('p', 'patches', '',
            _('location of source patch repository'), _('REPO')),
          ] + commands.remoteopts,
          _('hg qclone [OPTION]... SOURCE [DEST]'))
 def clone(ui, source, dest=None, **opts):
     '''clone main and patch repository at same time
 
     If source is local, destination will have no patches applied. If
     source is remote, this command can not check if patches are
     applied in source, so cannot guarantee that patches are not
     applied in destination. If you clone remote repository, be sure
     before that it has no patches applied.
 
     Source patch repository is looked for in <src>/.hg/patches by
     default. Use -p <url> to change.
 
     The patch directory must be a nested Mercurial repository, as
     would be created by :hg:`init --mq`.
 
     Return 0 on success.
     '''
     def patchdir(repo):
         """compute a patch repo url from a repo object"""
         url = repo.url()
         if url.endswith('/'):
             url = url[:-1]
         return url + '/.hg/patches'
 
     # main repo (destination and sources)
     if dest is None:
         dest = hg.defaultdest(source)
     sr = hg.peer(ui, opts, ui.expandpath(source))
 
     # patches repo (source only)
     if opts.get('patches'):
         patchespath = ui.expandpath(opts.get('patches'))
     else:
         patchespath = patchdir(sr)
     try:
         hg.peer(ui, opts, patchespath)
     except error.RepoError:
         raise util.Abort(_('versioned patch repository not found'
                            ' (see init --mq)'))
     qbase, destrev = None, None
     if sr.local():
         repo = sr.local()
         if repo.mq.applied and repo[qbase].phase() != phases.secret:
             qbase = repo.mq.applied[0].node
             if not hg.islocal(dest):
                 heads = set(repo.heads())
                 destrev = list(heads.difference(repo.heads(qbase)))
                 destrev.append(repo.changelog.parents(qbase)[0])
     elif sr.capable('lookup'):
         try:
             qbase = sr.lookup('qbase')
         except error.RepoError:
             pass
 
     ui.note(_('cloning main repository\n'))
     sr, dr = hg.clone(ui, opts, sr.url(), dest,
                       pull=opts.get('pull'),
                       rev=destrev,
                       update=False,
                       stream=opts.get('uncompressed'))
 
     ui.note(_('cloning patch repository\n'))
     hg.clone(ui, opts, opts.get('patches') or patchdir(sr), patchdir(dr),
              pull=opts.get('pull'), update=not opts.get('noupdate'),
              stream=opts.get('uncompressed'))
 
     if dr.local():
         repo = dr.local()
         if qbase:
             ui.note(_('stripping applied patches from destination '
                       'repository\n'))
             repo.mq.strip(repo, [qbase], update=False, backup=None)
         if not opts.get('noupdate'):
             ui.note(_('updating destination repository\n'))
             hg.update(repo, repo.changelog.tip())
 
 @command("qcommit|qci",
          commands.table["^commit|ci"][1],
          _('hg qcommit [OPTION]... [FILE]...'))
 def commit(ui, repo, *pats, **opts):
     """commit changes in the queue repository (DEPRECATED)
 
     This command is deprecated; use :hg:`commit --mq` instead."""
     q = repo.mq
     r = q.qrepo()
     if not r:
         raise util.Abort('no queue repository')
     commands.commit(r.ui, r, *pats, **opts)
 
 @command("qseries",
          [('m', 'missing', None, _('print patches not in series')),
          ] + seriesopts,
           _('hg qseries [-ms]'))
 def series(ui, repo, **opts):
     """print the entire series file
 
     Returns 0 on success."""
     repo.mq.qseries(repo, missing=opts.get('missing'),
                     summary=opts.get('summary'))
     return 0
 
 @command("qtop", seriesopts, _('hg qtop [-s]'))
 def top(ui, repo, **opts):
     """print the name of the current patch
 
     Returns 0 on success."""
     q = repo.mq
     t = q.applied and q.seriesend(True) or 0
     if t:
         q.qseries(repo, start=t - 1, length=1, status='A',
                   summary=opts.get('summary'))
     else:
         ui.write(_("no patches applied\n"))
         return 1
 
 @command("qnext", seriesopts, _('hg qnext [-s]'))
 def next(ui, repo, **opts):
     """print the name of the next pushable patch
 
     Returns 0 on success."""
     q = repo.mq
     end = q.seriesend()
     if end == len(q.series):
         ui.write(_("all patches applied\n"))
         return 1
     q.qseries(repo, start=end, length=1, summary=opts.get('summary'))
 
 @command("qprev", seriesopts, _('hg qprev [-s]'))
 def prev(ui, repo, **opts):
     """print the name of the preceding applied patch
 
     Returns 0 on success."""
     q = repo.mq
     l = len(q.applied)
     if l == 1:
         ui.write(_("only one patch applied\n"))
         return 1
     if not l:
         ui.write(_("no patches applied\n"))
         return 1
     idx = q.series.index(q.applied[-2].name)
     q.qseries(repo, start=idx, length=1, status='A',
               summary=opts.get('summary'))
 
 def setupheaderopts(ui, opts):
     if not opts.get('user') and opts.get('currentuser'):
         opts['user'] = ui.username()
     if not opts.get('date') and opts.get('currentdate'):
         opts['date'] = "%d %d" % util.makedate()
 
 @command("^qnew",
          [('e', 'edit', None, _('edit commit message')),
           ('f', 'force', None, _('import uncommitted changes (DEPRECATED)')),
           ('g', 'git', None, _('use git extended diff format')),
           ('U', 'currentuser', None, _('add "From: <current user>" to patch')),
           ('u', 'user', '',
            _('add "From: <USER>" to patch'), _('USER')),
           ('D', 'currentdate', None, _('add "Date: <current date>" to patch')),
           ('d', 'date', '',
            _('add "Date: <DATE>" to patch'), _('DATE'))
           ] + commands.walkopts + commands.commitopts,
          _('hg qnew [-e] [-m TEXT] [-l FILE] PATCH [FILE]...'))
 def new(ui, repo, patch, *args, **opts):
     """create a new patch
 
     qnew creates a new patch on top of the currently-applied patch (if
     any). The patch will be initialized with any outstanding changes
     in the working directory. You may also use -I/--include,
     -X/--exclude, and/or a list of files after the patch name to add
     only changes to matching files to the new patch, leaving the rest
     as uncommitted modifications.
 
     -u/--user and -d/--date can be used to set the (given) user and
     date, respectively. -U/--currentuser and -D/--currentdate set user
     to current user and date to current date.
 
     -e/--edit, -m/--message or -l/--logfile set the patch header as
     well as the commit message. If none is specified, the header is
     empty and the commit message is '[mq]: PATCH'.
 
     Use the -g/--git option to keep the patch in the git extended diff
     format. Read the diffs help topic for more information on why this
     is important for preserving permission changes and copy/rename
     information.
 
     Returns 0 on successful creation of a new patch.
     """
     msg = cmdutil.logmessage(ui, opts)
     def getmsg():
         return ui.edit(msg, opts.get('user') or ui.username())
     q = repo.mq
     opts['msg'] = msg
     if opts.get('edit'):
         opts['msg'] = getmsg
     else:
         opts['msg'] = msg
     setupheaderopts(ui, opts)
     q.new(repo, patch, *args, **opts)
     q.savedirty()
     return 0
 
 @command("^qrefresh",
          [('e', 'edit', None, _('edit commit message')),
           ('g', 'git', None, _('use git extended diff format')),
           ('s', 'short', None,
            _('refresh only files already in the patch and specified files')),
           ('U', 'currentuser', None,
            _('add/update author field in patch with current user')),
           ('u', 'user', '',
            _('add/update author field in patch with given user'), _('USER')),
           ('D', 'currentdate', None,
            _('add/update date field in patch with current date')),
           ('d', 'date', '',
            _('add/update date field in patch with given date'), _('DATE'))
           ] + commands.walkopts + commands.commitopts,
          _('hg qrefresh [-I] [-X] [-e] [-m TEXT] [-l FILE] [-s] [FILE]...'))
 def refresh(ui, repo, *pats, **opts):
     """update the current patch
 
     If any file patterns are provided, the refreshed patch will
     contain only the modifications that match those patterns; the
     remaining modifications will remain in the working directory.
 
     If -s/--short is specified, files currently included in the patch
     will be refreshed just like matched files and remain in the patch.
 
     If -e/--edit is specified, Mercurial will start your configured editor for
     you to enter a message. In case qrefresh fails, you will find a backup of
     your message in ``.hg/last-message.txt``.
 
     hg add/remove/copy/rename work as usual, though you might want to
     use git-style patches (-g/--git or [diff] git=1) to track copies
     and renames. See the diffs help topic for more information on the
     git diff format.
 
     Returns 0 on success.
     """
     q = repo.mq
     message = cmdutil.logmessage(ui, opts)
     if opts.get('edit'):
         if not q.applied:
             ui.write(_("no patches applied\n"))
             return 1
         if message:
             raise util.Abort(_('option "-e" incompatible with "-m" or "-l"'))
         patch = q.applied[-1].name
         ph = patchheader(q.join(patch), q.plainmode)
         message = ui.edit('\n'.join(ph.message), ph.user or ui.username())
         # We don't want to lose the patch message if qrefresh fails (issue2062)
         repo.savecommitmessage(message)
     setupheaderopts(ui, opts)
     wlock = repo.wlock()
     try:
         ret = q.refresh(repo, pats, msg=message, **opts)
         q.savedirty()
         return ret
     finally:
         wlock.release()
 
 @command("^qdiff",
          commands.diffopts + commands.diffopts2 + commands.walkopts,
          _('hg qdiff [OPTION]... [FILE]...'))
 def diff(ui, repo, *pats, **opts):
     """diff of the current patch and subsequent modifications
 
     Shows a diff which includes the current patch as well as any
     changes which have been made in the working directory since the
     last refresh (thus showing what the current patch would become
     after a qrefresh).
 
     Use :hg:`diff` if you only want to see the changes made since the
     last qrefresh, or :hg:`export qtip` if you want to see changes
     made by the current patch without including changes made since the
     qrefresh.
 
     Returns 0 on success.
     """
     repo.mq.diff(repo, pats, opts)
     return 0
 
 @command('qfold',
          [('e', 'edit', None, _('edit patch header')),
           ('k', 'keep', None, _('keep folded patch files')),
          ] + commands.commitopts,
          _('hg qfold [-e] [-k] [-m TEXT] [-l FILE] PATCH...'))
 def fold(ui, repo, *files, **opts):
     """fold the named patches into the current patch
 
     Patches must not yet be applied. Each patch will be successively
     applied to the current patch in the order given. If all the
     patches apply successfully, the current patch will be refreshed
     with the new cumulative patch, and the folded patches will be
     deleted. With -k/--keep, the folded patch files will not be
     removed afterwards.
 
     The header for each folded patch will be concatenated with the
     current patch header, separated by a line of ``* * *``.
 
     Returns 0 on success."""
     q = repo.mq
     if not files:
         raise util.Abort(_('qfold requires at least one patch name'))
     if not q.checktoppatch(repo)[0]:
         raise util.Abort(_('no patches applied'))
     q.checklocalchanges(repo)
 
     message = cmdutil.logmessage(ui, opts)
     if opts.get('edit'):
         if message:
             raise util.Abort(_('option "-e" incompatible with "-m" or "-l"'))
 
     parent = q.lookup('qtip')
     patches = []
     messages = []
     for f in files:
         p = q.lookup(f)
         if p in patches or p == parent:
             ui.warn(_('skipping already folded patch %s\n') % p)
         if q.isapplied(p):
             raise util.Abort(_('qfold cannot fold already applied patch %s')
                              % p)
         patches.append(p)
 
     for p in patches:
         if not message:
             ph = patchheader(q.join(p), q.plainmode)
             if ph.message:
                 messages.append(ph.message)
         pf = q.join(p)
         (patchsuccess, files, fuzz) = q.patch(repo, pf)
         if not patchsuccess:
             raise util.Abort(_('error folding patch %s') % p)
 
     if not message:
         ph = patchheader(q.join(parent), q.plainmode)
         message, user = ph.message, ph.user
         for msg in messages:
             message.append('* * *')
             message.extend(msg)
         message = '\n'.join(message)
 
     if opts.get('edit'):
         message = ui.edit(message, user or ui.username())
 
     diffopts = q.patchopts(q.diffopts(), *patches)
     wlock = repo.wlock()
     try:
         q.refresh(repo, msg=message, git=diffopts.git)
         q.delete(repo, patches, opts)
         q.savedirty()
     finally:
         wlock.release()
 
 @command("qgoto",
          [('', 'keep-changes', None,
            _('tolerate non-conflicting local changes')),
           ('f', 'force', None, _('overwrite any local changes')),
           ('', 'no-backup', None, _('do not save backup copies of files'))],
          _('hg qgoto [OPTION]... PATCH'))
 def goto(ui, repo, patch, **opts):
     '''push or pop patches until named patch is at top of stack
 
     Returns 0 on success.'''
     opts = fixkeepchangesopts(ui, opts)
     q = repo.mq
     patch = q.lookup(patch)
     nobackup = opts.get('no_backup')
     keepchanges = opts.get('keep_changes')
     if q.isapplied(patch):
         ret = q.pop(repo, patch, force=opts.get('force'), nobackup=nobackup,
                     keepchanges=keepchanges)
     else:
         ret = q.push(repo, patch, force=opts.get('force'), nobackup=nobackup,
                      keepchanges=keepchanges)
     q.savedirty()
     return ret
 
 @command("qguard",
          [('l', 'list', None, _('list all patches and guards')),
           ('n', 'none', None, _('drop all guards'))],
          _('hg qguard [-l] [-n] [PATCH] [-- [+GUARD]... [-GUARD]...]'))
 def guard(ui, repo, *args, **opts):
     '''set or print guards for a patch
 
     Guards control whether a patch can be pushed. A patch with no
     guards is always pushed. A patch with a positive guard ("+foo") is
     pushed only if the :hg:`qselect` command has activated it. A patch with
     a negative guard ("-foo") is never pushed if the :hg:`qselect` command
     has activated it.
 
     With no arguments, print the currently active guards.
     With arguments, set guards for the named patch.
 
     .. note::
        Specifying negative guards now requires '--'.
 
     To set guards on another patch::
 
       hg qguard other.patch -- +2.6.17 -stable
 
     Returns 0 on success.
     '''
     def status(idx):
         guards = q.seriesguards[idx] or ['unguarded']
         if q.series[idx] in applied:
             state = 'applied'
         elif q.pushable(idx)[0]:
             state = 'unapplied'
         else:
             state = 'guarded'
         label = 'qguard.patch qguard.%s qseries.%s' % (state, state)
         ui.write('%s: ' % ui.label(q.series[idx], label))
 
         for i, guard in enumerate(guards):
             if guard.startswith('+'):
                 ui.write(guard, label='qguard.positive')
             elif guard.startswith('-'):
                 ui.write(guard, label='qguard.negative')
             else:
                 ui.write(guard, label='qguard.unguarded')
             if i != len(guards) - 1:
                 ui.write(' ')
         ui.write('\n')
     q = repo.mq
     applied = set(p.name for p in q.applied)
     patch = None
     args = list(args)
     if opts.get('list'):
         if args or opts.get('none'):
             raise util.Abort(_('cannot mix -l/--list with options or '
                                'arguments'))
         for i in xrange(len(q.series)):
             status(i)
         return
     if not args or args[0][0:1] in '-+':
         if not q.applied:
             raise util.Abort(_('no patches applied'))
         patch = q.applied[-1].name
     if patch is None and args[0][0:1] not in '-+':
         patch = args.pop(0)
     if patch is None:
         raise util.Abort(_('no patch to work with'))
     if args or opts.get('none'):
         idx = q.findseries(patch)
         if idx is None:
             raise util.Abort(_('no patch named %s') % patch)
         q.setguards(idx, args)
         q.savedirty()
     else:
         status(q.series.index(q.lookup(patch)))
 
 @command("qheader", [], _('hg qheader [PATCH]'))
 def header(ui, repo, patch=None):
     """print the header of the topmost or specified patch
 
     Returns 0 on success."""
     q = repo.mq
 
     if patch:
         patch = q.lookup(patch)
     else:
         if not q.applied:
             ui.write(_('no patches applied\n'))
             return 1
         patch = q.lookup('qtip')
     ph = patchheader(q.join(patch), q.plainmode)
 
     ui.write('\n'.join(ph.message) + '\n')
 
 def lastsavename(path):
     (directory, base) = os.path.split(path)
     names = os.listdir(directory)
     namere = re.compile("%s.([0-9]+)" % base)
     maxindex = None
     maxname = None
     for f in names:
         m = namere.match(f)
         if m:
             index = int(m.group(1))
             if maxindex is None or index > maxindex:
                 maxindex = index
                 maxname = f
     if maxname:
         return (os.path.join(directory, maxname), maxindex)
     return (None, None)
 
 def savename(path):
     (last, index) = lastsavename(path)
     if last is None:
         index = 0
     newpath = path + ".%d" % (index + 1)
     return newpath
 
 @command("^qpush",
          [('', 'keep-changes', None,
            _('tolerate non-conflicting local changes')),
           ('f', 'force', None, _('apply on top of local changes')),
           ('e', 'exact', None,
            _('apply the target patch to its recorded parent')),
           ('l', 'list', None, _('list patch name in commit text')),
           ('a', 'all', None, _('apply all patches')),
           ('m', 'merge', None, _('merge from another queue (DEPRECATED)')),
           ('n', 'name', '',
            _('merge queue name (DEPRECATED)'), _('NAME')),
           ('', 'move', None,
            _('reorder patch series and apply only the patch')),
           ('', 'no-backup', None, _('do not save backup copies of files'))],
          _('hg qpush [-f] [-l] [-a] [--move] [PATCH | INDEX]'))
 def push(ui, repo, patch=None, **opts):
     """push the next patch onto the stack
 
     By default, abort if the working directory contains uncommitted
     changes. With --keep-changes, abort only if the uncommitted files
     overlap with patched files. With -f/--force, backup and patch over
     uncommitted changes.
 
     Return 0 on success.
     """
     q = repo.mq
     mergeq = None
 
     opts = fixkeepchangesopts(ui, opts)
     if opts.get('merge'):
         if opts.get('name'):
             newpath = repo.join(opts.get('name'))
         else:
             newpath, i = lastsavename(q.path)
         if not newpath:
             ui.warn(_("no saved queues found, please use -n\n"))
             return 1
         mergeq = queue(ui, repo.path, newpath)
         ui.warn(_("merging with queue at: %s\n") % mergeq.path)
     ret = q.push(repo, patch, force=opts.get('force'), list=opts.get('list'),
                  mergeq=mergeq, all=opts.get('all'), move=opts.get('move'),
                  exact=opts.get('exact'), nobackup=opts.get('no_backup'),
                  keepchanges=opts.get('keep_changes'))
     return ret
 
 @command("^qpop",
          [('a', 'all', None, _('pop all patches')),
           ('n', 'name', '',
            _('queue name to pop (DEPRECATED)'), _('NAME')),
           ('', 'keep-changes', None,
            _('tolerate non-conflicting local changes')),
           ('f', 'force', None, _('forget any local changes to patched files')),
           ('', 'no-backup', None, _('do not save backup copies of files'))],
          _('hg qpop [-a] [-f] [PATCH | INDEX]'))
 def pop(ui, repo, patch=None, **opts):
     """pop the current patch off the stack
 
     Without argument, pops off the top of the patch stack. If given a
     patch name, keeps popping off patches until the named patch is at
     the top of the stack.
 
     By default, abort if the working directory contains uncommitted
     changes. With --keep-changes, abort only if the uncommitted files
     overlap with patched files. With -f/--force, backup and discard
     changes made to such files.
 
     Return 0 on success.
     """
     opts = fixkeepchangesopts(ui, opts)
     localupdate = True
     if opts.get('name'):
         q = queue(ui, repo.path, repo.join(opts.get('name')))
         ui.warn(_('using patch queue: %s\n') % q.path)
         localupdate = False
     else:
         q = repo.mq
     ret = q.pop(repo, patch, force=opts.get('force'), update=localupdate,
                 all=opts.get('all'), nobackup=opts.get('no_backup'),
                 keepchanges=opts.get('keep_changes'))
     q.savedirty()
     return ret
 
 @command("qrename|qmv", [], _('hg qrename PATCH1 [PATCH2]'))
 def rename(ui, repo, patch, name=None, **opts):
     """rename a patch
 
     With one argument, renames the current patch to PATCH1.
     With two arguments, renames PATCH1 to PATCH2.
 
     Returns 0 on success."""
     q = repo.mq
     if not name:
         name = patch
         patch = None
 
     if patch:
         patch = q.lookup(patch)
     else:
         if not q.applied:
             ui.write(_('no patches applied\n'))
             return
         patch = q.lookup('qtip')
     absdest = q.join(name)
     if os.path.isdir(absdest):
         name = normname(os.path.join(name, os.path.basename(patch)))
         absdest = q.join(name)
     q.checkpatchname(name)
 
     ui.note(_('renaming %s to %s\n') % (patch, name))
     i = q.findseries(patch)
     guards = q.guard_re.findall(q.fullseries[i])
     q.fullseries[i] = name + ''.join([' #' + g for g in guards])
     q.parseseries()
     q.seriesdirty = True
 
     info = q.isapplied(patch)
     if info:
         q.applied[info[0]] = statusentry(info[1], name)
     q.applieddirty = True
 
     destdir = os.path.dirname(absdest)
     if not os.path.isdir(destdir):
         os.makedirs(destdir)
     util.rename(q.join(patch), absdest)
     r = q.qrepo()
     if r and patch in r.dirstate:
         wctx = r[None]
         wlock = r.wlock()
         try:
             if r.dirstate[patch] == 'a':
                 r.dirstate.drop(patch)
                 r.dirstate.add(name)
             else:
                 wctx.copy(patch, name)
                 wctx.forget([patch])
         finally:
             wlock.release()
 
     q.savedirty()
 
 @command("qrestore",
          [('d', 'delete', None, _('delete save entry')),
           ('u', 'update', None, _('update queue working directory'))],
          _('hg qrestore [-d] [-u] REV'))
 def restore(ui, repo, rev, **opts):
     """restore the queue state saved by a revision (DEPRECATED)
 
     This command is deprecated, use :hg:`rebase` instead."""
     rev = repo.lookup(rev)
     q = repo.mq
     q.restore(repo, rev, delete=opts.get('delete'),
               qupdate=opts.get('update'))
     q.savedirty()
     return 0
 
 @command("qsave",
          [('c', 'copy', None, _('copy patch directory')),
           ('n', 'name', '',
            _('copy directory name'), _('NAME')),
           ('e', 'empty', None, _('clear queue status file')),
           ('f', 'force', None, _('force copy'))] + commands.commitopts,
          _('hg qsave [-m TEXT] [-l FILE] [-c] [-n NAME] [-e] [-f]'))
 def save(ui, repo, **opts):
     """save current queue state (DEPRECATED)
 
     This command is deprecated, use :hg:`rebase` instead."""
     q = repo.mq
     message = cmdutil.logmessage(ui, opts)
     ret = q.save(repo, msg=message)
     if ret:
         return ret
     q.savedirty() # save to .hg/patches before copying
     if opts.get('copy'):
         path = q.path
         if opts.get('name'):
             newpath = os.path.join(q.basepath, opts.get('name'))
             if os.path.exists(newpath):
                 if not os.path.isdir(newpath):
                     raise util.Abort(_('destination %s exists and is not '
                                        'a directory') % newpath)
                 if not opts.get('force'):
                     raise util.Abort(_('destination %s exists, '
                                        'use -f to force') % newpath)
         else:
             newpath = savename(path)
         ui.warn(_("copy %s to %s\n") % (path, newpath))
         util.copyfiles(path, newpath)
     if opts.get('empty'):
         del q.applied[:]
         q.applieddirty = True
         q.savedirty()
     return 0
 
 @command("strip",
          [
           ('r', 'rev', [], _('strip specified revision (optional, '
                                'can specify revisions without this '
                                'option)'), _('REV')),
           ('f', 'force', None, _('force removal of changesets, discard '
                                  'uncommitted changes (no backup)')),
           ('b', 'backup', None, _('bundle only changesets with local revision'
                                   ' number greater than REV which are not'
                                   ' descendants of REV (DEPRECATED)')),
           ('', 'no-backup', None, _('no backups')),
           ('', 'nobackup', None, _('no backups (DEPRECATED)')),
           ('n', '', None, _('ignored  (DEPRECATED)')),
           ('k', 'keep', None, _("do not modify working copy during strip")),
           ('B', 'bookmark', '', _("remove revs only reachable from given"
                                   " bookmark"))],
           _('hg strip [-k] [-f] [-n] [-B bookmark] [-r] REV...'))
 def strip(ui, repo, *revs, **opts):
     """strip changesets and all their descendants from the repository
 
     The strip command removes the specified changesets and all their
     descendants. If the working directory has uncommitted changes, the
     operation is aborted unless the --force flag is supplied, in which
     case changes will be discarded.
 
     If a parent of the working directory is stripped, then the working
     directory will automatically be updated to the most recent
     available ancestor of the stripped parent after the operation
     completes.
 
     Any stripped changesets are stored in ``.hg/strip-backup`` as a
     bundle (see :hg:`help bundle` and :hg:`help unbundle`). They can
     be restored by running :hg:`unbundle .hg/strip-backup/BUNDLE`,
     where BUNDLE is the bundle file created by the strip. Note that
     the local revision numbers will in general be different after the
     restore.
 
     Use the --no-backup option to discard the backup bundle once the
     operation completes.
 
     Strip is not a history-rewriting operation and can be used on
     changesets in the public phase. But if the stripped changesets have
     been pushed to a remote repository you will likely pull them again.
 
     Return 0 on success.
     """
     backup = 'all'
     if opts.get('backup'):
         backup = 'strip'
     elif opts.get('no_backup') or opts.get('nobackup'):
         backup = 'none'
 
     cl = repo.changelog
     revs = list(revs) + opts.get('rev')
     revs = set(scmutil.revrange(repo, revs))
 
     if opts.get('bookmark'):
         mark = opts.get('bookmark')
         marks = repo._bookmarks
         if mark not in marks:
             raise util.Abort(_("bookmark '%s' not found") % mark)
 
         # If the requested bookmark is not the only one pointing to a
         # a revision we have to only delete the bookmark and not strip
         # anything. revsets cannot detect that case.
         uniquebm = True
         for m, n in marks.iteritems():
             if m != mark and n == repo[mark].node():
                 uniquebm = False
                 break
         if uniquebm:
             rsrevs = repo.revs("ancestors(bookmark(%s)) - "
                                "ancestors(head() and not bookmark(%s)) - "
                                "ancestors(bookmark() and not bookmark(%s))",
                                mark, mark, mark)
             revs.update(set(rsrevs))
         if not revs:
             del marks[mark]
             repo._writebookmarks(mark)
             ui.write(_("bookmark '%s' deleted\n") % mark)
 
     if not revs:
         raise util.Abort(_('empty revision set'))
 
     descendants = set(cl.descendants(revs))
     strippedrevs = revs.union(descendants)
     roots = revs.difference(descendants)
 
     update = False
     # if one of the wdir parent is stripped we'll need
     # to update away to an earlier revision
     for p in repo.dirstate.parents():
         if p != nullid and cl.rev(p) in strippedrevs:
             update = True
             break
 
     rootnodes = set(cl.node(r) for r in roots)
 
     q = repo.mq
     if q.applied:
         # refresh queue state if we're about to strip
         # applied patches
         if cl.rev(repo.lookup('qtip')) in strippedrevs:
             q.applieddirty = True
             start = 0
             end = len(q.applied)
             for i, statusentry in enumerate(q.applied):
                 if statusentry.node in rootnodes:
                     # if one of the stripped roots is an applied
                     # patch, only part of the queue is stripped
                     start = i
                     break
             del q.applied[start:end]
             q.savedirty()
 
     revs = list(rootnodes)
     if update and opts.get('keep'):
         wlock = repo.wlock()
         try:
             urev = repo.mq.qparents(repo, revs[0])
             repo.dirstate.rebuild(urev, repo[urev].manifest())
             repo.dirstate.write()
             update = False
         finally:
             wlock.release()
 
     if opts.get('bookmark'):
         del marks[mark]
         repo._writebookmarks(marks)
         ui.write(_("bookmark '%s' deleted\n") % mark)
 
     repo.mq.strip(repo, revs, backup=backup, update=update,
                   force=opts.get('force'))
 
     return 0
 
 @command("qselect",
          [('n', 'none', None, _('disable all guards')),
           ('s', 'series', None, _('list all guards in series file')),
           ('', 'pop', None, _('pop to before first guarded applied patch')),
           ('', 'reapply', None, _('pop, then reapply patches'))],
          _('hg qselect [OPTION]... [GUARD]...'))
 def select(ui, repo, *args, **opts):
     '''set or print guarded patches to push
 
     Use the :hg:`qguard` command to set or print guards on patch, then use
     qselect to tell mq which guards to use. A patch will be pushed if
     it has no guards or any positive guards match the currently
     selected guard, but will not be pushed if any negative guards
     match the current guard. For example::
 
         qguard foo.patch -- -stable    (negative guard)
         qguard bar.patch    +stable    (positive guard)
         qselect stable
 
     This activates the "stable" guard. mq will skip foo.patch (because
     it has a negative match) but push bar.patch (because it has a
     positive match).
 
     With no arguments, prints the currently active guards.
     With one argument, sets the active guard.
 
     Use -n/--none to deactivate guards (no other arguments needed).
     When no guards are active, patches with positive guards are
     skipped and patches with negative guards are pushed.
 
     qselect can change the guards on applied patches. It does not pop
     guarded patches by default. Use --pop to pop back to the last
     applied patch that is not guarded. Use --reapply (which implies
     --pop) to push back to the current patch afterwards, but skip
     guarded patches.
 
     Use -s/--series to print a list of all guards in the series file
     (no other arguments needed). Use -v for more information.
 
     Returns 0 on success.'''
 
     q = repo.mq
     guards = q.active()
     if args or opts.get('none'):
         old_unapplied = q.unapplied(repo)
         old_guarded = [i for i in xrange(len(q.applied)) if
                        not q.pushable(i)[0]]
         q.setactive(args)
         q.savedirty()
         if not args:
             ui.status(_('guards deactivated\n'))
         if not opts.get('pop') and not opts.get('reapply'):
             unapplied = q.unapplied(repo)
             guarded = [i for i in xrange(len(q.applied))
                        if not q.pushable(i)[0]]
             if len(unapplied) != len(old_unapplied):
                 ui.status(_('number of unguarded, unapplied patches has '
                             'changed from %d to %d\n') %
                           (len(old_unapplied), len(unapplied)))
             if len(guarded) != len(old_guarded):
                 ui.status(_('number of guarded, applied patches has changed '
                             'from %d to %d\n') %
                           (len(old_guarded), len(guarded)))
     elif opts.get('series'):
         guards = {}
         noguards = 0
         for gs in q.seriesguards:
             if not gs:
                 noguards += 1
             for g in gs:
                 guards.setdefault(g, 0)
                 guards[g] += 1
         if ui.verbose:
             guards['NONE'] = noguards
         guards = guards.items()
         guards.sort(key=lambda x: x[0][1:])
         if guards:
             ui.note(_('guards in series file:\n'))
             for guard, count in guards:
                 ui.note('%2d  ' % count)
                 ui.write(guard, '\n')
         else:
             ui.note(_('no guards in series file\n'))
     else:
         if guards:
             ui.note(_('active guards:\n'))
             for g in guards:
                 ui.write(g, '\n')
         else:
             ui.write(_('no active guards\n'))
     reapply = opts.get('reapply') and q.applied and q.appliedname(-1)
     popped = False
     if opts.get('pop') or opts.get('reapply'):
         for i in xrange(len(q.applied)):
             pushable, reason = q.pushable(i)
             if not pushable:
                 ui.status(_('popping guarded patches\n'))
                 popped = True
                 if i == 0:
                     q.pop(repo, all=True)
                 else:
                     q.pop(repo, str(i - 1))
                 break
     if popped:
         try:
             if reapply:
                 ui.status(_('reapplying unguarded patches\n'))
                 q.push(repo, reapply)
         finally:
             q.savedirty()
 
 @command("qfinish",
          [('a', 'applied', None, _('finish all applied changesets'))],
          _('hg qfinish [-a] [REV]...'))
 def finish(ui, repo, *revrange, **opts):
     """move applied patches into repository history
 
     Finishes the specified revisions (corresponding to applied
     patches) by moving them out of mq control into regular repository
     history.
 
     Accepts a revision range or the -a/--applied option. If --applied
     is specified, all applied mq revisions are removed from mq
     control. Otherwise, the given revisions must be at the base of the
     stack of applied patches.
 
     This can be especially useful if your changes have been applied to
     an upstream repository, or if you are about to push your changes
     to upstream.
 
     Returns 0 on success.
     """
     if not opts.get('applied') and not revrange:
         raise util.Abort(_('no revisions specified'))
     elif opts.get('applied'):
         revrange = ('qbase::qtip',) + revrange
 
     q = repo.mq
     if not q.applied:
         ui.status(_('no patches applied\n'))
         return 0
 
     revs = scmutil.revrange(repo, revrange)
     if repo['.'].rev() in revs and repo[None].files():
         ui.warn(_('warning: uncommitted changes in the working directory\n'))
     # queue.finish may changes phases but leave the responsibility to lock the
     # repo to the caller to avoid deadlock with wlock. This command code is
     # responsibility for this locking.
     lock = repo.lock()
     try:
         q.finish(repo, revs)
         q.savedirty()
     finally:
         lock.release()
     return 0
 
 @command("qqueue",
          [('l', 'list', False, _('list all available queues')),
           ('', 'active', False, _('print name of active queue')),
           ('c', 'create', False, _('create new queue')),
           ('', 'rename', False, _('rename active queue')),
           ('', 'delete', False, _('delete reference to queue')),
           ('', 'purge', False, _('delete queue, and remove patch dir')),
          ],
          _('[OPTION] [QUEUE]'))
 def qqueue(ui, repo, name=None, **opts):
     '''manage multiple patch queues
 
     Supports switching between different patch queues, as well as creating
     new patch queues and deleting existing ones.
 
     Omitting a queue name or specifying -l/--list will show you the registered
     queues - by default the "normal" patches queue is registered. The currently
     active queue will be marked with "(active)". Specifying --active will print
     only the name of the active queue.
 
     To create a new queue, use -c/--create. The queue is automatically made
     active, except in the case where there are applied patches from the
     currently active queue in the repository. Then the queue will only be
     created and switching will fail.
 
     To delete an existing queue, use --delete. You cannot delete the currently
     active queue.
 
     Returns 0 on success.
     '''
     q = repo.mq
     _defaultqueue = 'patches'
     _allqueues = 'patches.queues'
     _activequeue = 'patches.queue'
 
     def _getcurrent():
         cur = os.path.basename(q.path)
         if cur.startswith('patches-'):
             cur = cur[8:]
         return cur
 
     def _noqueues():
         try:
             fh = repo.opener(_allqueues, 'r')
             fh.close()
         except IOError:
             return True
 
         return False
 
     def _getqueues():
         current = _getcurrent()
 
         try:
             fh = repo.opener(_allqueues, 'r')
             queues = [queue.strip() for queue in fh if queue.strip()]
             fh.close()
             if current not in queues:
                 queues.append(current)
         except IOError:
             queues = [_defaultqueue]
 
         return sorted(queues)
 
     def _setactive(name):
         if q.applied:
             raise util.Abort(_('new queue created, but cannot make active '
                                'as patches are applied'))
         _setactivenocheck(name)
 
     def _setactivenocheck(name):
         fh = repo.opener(_activequeue, 'w')
         if name != 'patches':
             fh.write(name)
         fh.close()
 
     def _addqueue(name):
         fh = repo.opener(_allqueues, 'a')
         fh.write('%s\n' % (name,))
         fh.close()
 
     def _queuedir(name):
         if name == 'patches':
             return repo.join('patches')
         else:
             return repo.join('patches-' + name)
 
     def _validname(name):
         for n in name:
             if n in ':\\/.':
                 return False
         return True
 
     def _delete(name):
         if name not in existing:
             raise util.Abort(_('cannot delete queue that does not exist'))
 
         current = _getcurrent()
 
         if name == current:
             raise util.Abort(_('cannot delete currently active queue'))
 
         fh = repo.opener('patches.queues.new', 'w')
         for queue in existing:
             if queue == name:
                 continue
             fh.write('%s\n' % (queue,))
         fh.close()
         util.rename(repo.join('patches.queues.new'), repo.join(_allqueues))
 
     if not name or opts.get('list') or opts.get('active'):
         current = _getcurrent()
         if opts.get('active'):
             ui.write('%s\n' % (current,))
             return
         for queue in _getqueues():
             ui.write('%s' % (queue,))
             if queue == current and not ui.quiet:
                 ui.write(_(' (active)\n'))
             else:
                 ui.write('\n')
         return
 
     if not _validname(name):
         raise util.Abort(
                 _('invalid queue name, may not contain the characters ":\\/."'))
 
     existing = _getqueues()
 
     if opts.get('create'):
         if name in existing:
             raise util.Abort(_('queue "%s" already exists') % name)
         if _noqueues():
             _addqueue(_defaultqueue)
         _addqueue(name)
         _setactive(name)
     elif opts.get('rename'):
         current = _getcurrent()
         if name == current:
             raise util.Abort(_('can\'t rename "%s" to its current name') % name)
         if name in existing:
             raise util.Abort(_('queue "%s" already exists') % name)
 
         olddir = _queuedir(current)
         newdir = _queuedir(name)
 
         if os.path.exists(newdir):
             raise util.Abort(_('non-queue directory "%s" already exists') %
                     newdir)
 
         fh = repo.opener('patches.queues.new', 'w')
         for queue in existing:
             if queue == current:
                 fh.write('%s\n' % (name,))
                 if os.path.exists(olddir):
                     util.rename(olddir, newdir)
             else:
                 fh.write('%s\n' % (queue,))
         fh.close()
         util.rename(repo.join('patches.queues.new'), repo.join(_allqueues))
         _setactivenocheck(name)
     elif opts.get('delete'):
         _delete(name)
     elif opts.get('purge'):
         if name in existing:
             _delete(name)
         qdir = _queuedir(name)
         if os.path.exists(qdir):
             shutil.rmtree(qdir)
     else:
         if name not in existing:
             raise util.Abort(_('use --create to create a new queue'))
         _setactive(name)
 
 def mqphasedefaults(repo, roots):
     """callback used to set mq changeset as secret when no phase data exists"""
     if repo.mq.applied:
         if repo.ui.configbool('mq', 'secret', False):
             mqphase = phases.secret
         else:
             mqphase = phases.draft
         qbase = repo[repo.mq.applied[0].node]
         roots[mqphase].add(qbase.node())
     return roots
 
 def reposetup(ui, repo):
     class mqrepo(repo.__class__):
         @util.propertycache
         def mq(self):
             return queue(self.ui, self.path)
 
         def abortifwdirpatched(self, errmsg, force=False):
             if self.mq.applied and not force:
                 parents = self.dirstate.parents()
                 patches = [s.node for s in self.mq.applied]
                 if parents[0] in patches or parents[1] in patches:
                     raise util.Abort(errmsg)
 
         def commit(self, text="", user=None, date=None, match=None,
                    force=False, editor=False, extra={}):
             self.abortifwdirpatched(
                 _('cannot commit over an applied mq patch'),
                 force)
 
             return super(mqrepo, self).commit(text, user, date, match, force,
                                               editor, extra)
 
         def checkpush(self, force, revs):
             if self.mq.applied and not force:
                 outapplied = [e.node for e in self.mq.applied]
                 if revs:
                     # Assume applied patches have no non-patch descendants and
                     # are not on remote already. Filtering any changeset not
                     # pushed.
                     heads = set(revs)
                     for node in reversed(outapplied):
                         if node in heads:
                             break
                         else:
                             outapplied.pop()
                 # looking for pushed and shared changeset
                 for node in outapplied:
                     if repo[node].phase() < phases.secret:
                         raise util.Abort(_('source has mq patches applied'))
                 # no non-secret patches pushed
             super(mqrepo, self).checkpush(force, revs)
 
         def _findtags(self):
             '''augment tags from base class with patch tags'''
             result = super(mqrepo, self)._findtags()
 
             q = self.mq
             if not q.applied:
                 return result
 
             mqtags = [(patch.node, patch.name) for patch in q.applied]
 
             try:
                 self.changelog.rev(mqtags[-1][0])
             except error.LookupError:
                 self.ui.warn(_('mq status file refers to unknown node %s\n')
                              % short(mqtags[-1][0]))
                 return result
 
             mqtags.append((mqtags[-1][0], 'qtip'))
             mqtags.append((mqtags[0][0], 'qbase'))
             mqtags.append((self.changelog.parents(mqtags[0][0])[0], 'qparent'))
             tags = result[0]
             for patch in mqtags:
                 if patch[1] in tags:
                     self.ui.warn(_('tag %s overrides mq patch of the same '
                                    'name\n') % patch[1])
                 else:
                     tags[patch[1]] = patch[0]
 
             return result
 
         def _branchtags(self, partial, lrev):
             q = self.mq
             cl = self.changelog
             qbase = None
             if not q.applied:
                 if getattr(self, '_committingpatch', False):
                     # Committing a new patch, must be tip
                     qbase = len(cl) - 1
             else:
                 qbasenode = q.applied[0].node
                 try:
                     qbase = cl.rev(qbasenode)
                 except error.LookupError:
                     self.ui.warn(_('mq status file refers to unknown node %s\n')
                                  % short(qbasenode))
             if qbase is None:
                 return super(mqrepo, self)._branchtags(partial, lrev)
 
             start = lrev + 1
             if start < qbase:
                 # update the cache (excluding the patches) and save it
                 ctxgen = (self[r] for r in xrange(lrev + 1, qbase))
                 self._updatebranchcache(partial, ctxgen)
                 self._writebranchcache(partial, cl.node(qbase - 1), qbase - 1)
                 start = qbase
             # if start = qbase, the cache is as updated as it should be.
             # if start > qbase, the cache includes (part of) the patches.
             # we might as well use it, but we won't save it.
 
             # update the cache up to the tip
             ctxgen = (self[r] for r in xrange(start, len(cl)))
             self._updatebranchcache(partial, ctxgen)
 
             return partial
 
     if repo.local():
         repo.__class__ = mqrepo
 
         repo._phasedefaults.append(mqphasedefaults)
 
 def mqimport(orig, ui, repo, *args, **kwargs):
     if (util.safehasattr(repo, 'abortifwdirpatched')
         and not kwargs.get('no_commit', False)):
         repo.abortifwdirpatched(_('cannot import over an applied patch'),
                                    kwargs.get('force'))
     return orig(ui, repo, *args, **kwargs)
 
 def mqinit(orig, ui, *args, **kwargs):
     mq = kwargs.pop('mq', None)
 
     if not mq:
         return orig(ui, *args, **kwargs)
 
     if args:
         repopath = args[0]
         if not hg.islocal(repopath):
             raise util.Abort(_('only a local queue repository '
                                'may be initialized'))
     else:
         repopath = cmdutil.findrepo(os.getcwd())
         if not repopath:
             raise util.Abort(_('there is no Mercurial repository here '
                                '(.hg not found)'))
     repo = hg.repository(ui, repopath)
     return qinit(ui, repo, True)
 
 def mqcommand(orig, ui, repo, *args, **kwargs):
     """Add --mq option to operate on patch repository instead of main"""
 
     # some commands do not like getting unknown options
     mq = kwargs.pop('mq', None)
 
     if not mq:
         return orig(ui, repo, *args, **kwargs)
 
     q = repo.mq
     r = q.qrepo()
     if not r:
         raise util.Abort(_('no queue repository'))
     return orig(r.ui, r, *args, **kwargs)
 
 def summary(orig, ui, repo, *args, **kwargs):
     r = orig(ui, repo, *args, **kwargs)
     q = repo.mq
     m = []
     a, u = len(q.applied), len(q.unapplied(repo))
     if a:
         m.append(ui.label(_("%d applied"), 'qseries.applied') % a)
     if u:
         m.append(ui.label(_("%d unapplied"), 'qseries.unapplied') % u)
     if m:
         ui.write("mq:     %s\n" % ', '.join(m))
     else:
         ui.note(_("mq:     (empty queue)\n"))
     return r
 
 def revsetmq(repo, subset, x):
     """``mq()``
     Changesets managed by MQ.
     """
     revset.getargs(x, 0, 0, _("mq takes no arguments"))
     applied = set([repo[r.node].rev() for r in repo.mq.applied])
     return [r for r in subset if r in applied]
 
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = [revsetmq]
 
 def extsetup(ui):
     # Ensure mq wrappers are called first, regardless of extension load order by
     # NOT wrapping in uisetup() and instead deferring to init stage two here.
     mqopt = [('', 'mq', None, _("operate on patch repository"))]
 
     extensions.wrapcommand(commands.table, 'import', mqimport)
     extensions.wrapcommand(commands.table, 'summary', summary)
 
     entry = extensions.wrapcommand(commands.table, 'init', mqinit)
     entry[1].extend(mqopt)
 
     nowrap = set(commands.norepo.split(" "))
 
     def dotable(cmdtable):
         for cmd in cmdtable.keys():
             cmd = cmdutil.parsealiases(cmd)[0]
             if cmd in nowrap:
                 continue
             entry = extensions.wrapcommand(cmdtable, cmd, mqcommand)
             entry[1].extend(mqopt)
 
     dotable(commands.table)
 
     for extname, extmodule in extensions.extensions():
         if extmodule.__file__ != __file__:
             dotable(getattr(extmodule, 'cmdtable', {}))
 
     revset.symbols['mq'] = revsetmq
 
 colortable = {'qguard.negative': 'red',
               'qguard.positive': 'yellow',
               'qguard.unguarded': 'green',
               'qseries.applied': 'blue bold underline',
               'qseries.guarded': 'black bold',
               'qseries.missing': 'red bold',
               'qseries.unapplied': 'black bold'}
 
 commands.inferrepo += " qnew qrefresh qdiff qcommit"

mercurial/commands.py

@@ -1,5956 +1,5956 b''
 # commands.py - command processing for mercurial
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from node import hex, bin, nullid, nullrev, short
 from lock import release
 from i18n import _, gettext
 import os, re, difflib, time, tempfile, errno
 import hg, scmutil, util, revlog, extensions, copies, error, bookmarks
-import patch, help, url, encoding, templatekw, discovery
+import patch, help, encoding, templatekw, discovery
 import archival, changegroup, cmdutil, hbisect
 import sshserver, hgweb, hgweb.server, commandserver
 import merge as mergemod
 import minirst, revset, fileset
 import dagparser, context, simplemerge, graphmod
 import random, setdiscovery, treediscovery, dagutil, pvec, localrepo
 import phases, obsolete
 
 table = {}
 
 command = cmdutil.command(table)
 
 # common command options
 
 globalopts = [
     ('R', 'repository', '',
      _('repository root directory or name of overlay bundle file'),
      _('REPO')),
     ('', 'cwd', '',
      _('change working directory'), _('DIR')),
     ('y', 'noninteractive', None,
      _('do not prompt, automatically pick the first choice for all prompts')),
     ('q', 'quiet', None, _('suppress output')),
     ('v', 'verbose', None, _('enable additional output')),
     ('', 'config', [],
      _('set/override config option (use \'section.name=value\')'),
      _('CONFIG')),
     ('', 'debug', None, _('enable debugging output')),
     ('', 'debugger', None, _('start debugger')),
     ('', 'encoding', encoding.encoding, _('set the charset encoding'),
      _('ENCODE')),
     ('', 'encodingmode', encoding.encodingmode,
      _('set the charset encoding mode'), _('MODE')),
     ('', 'traceback', None, _('always print a traceback on exception')),
     ('', 'time', None, _('time how long the command takes')),
     ('', 'profile', None, _('print command execution profile')),
     ('', 'version', None, _('output version information and exit')),
     ('h', 'help', None, _('display help and exit')),
 ]
 
 dryrunopts = [('n', 'dry-run', None,
                _('do not perform actions, just print output'))]
 
 remoteopts = [
     ('e', 'ssh', '',
      _('specify ssh command to use'), _('CMD')),
     ('', 'remotecmd', '',
      _('specify hg command to run on the remote side'), _('CMD')),
     ('', 'insecure', None,
      _('do not verify server certificate (ignoring web.cacerts config)')),
 ]
 
 walkopts = [
     ('I', 'include', [],
      _('include names matching the given patterns'), _('PATTERN')),
     ('X', 'exclude', [],
      _('exclude names matching the given patterns'), _('PATTERN')),
 ]
 
 commitopts = [
     ('m', 'message', '',
      _('use text as commit message'), _('TEXT')),
     ('l', 'logfile', '',
      _('read commit message from file'), _('FILE')),
 ]
 
 commitopts2 = [
     ('d', 'date', '',
      _('record the specified date as commit date'), _('DATE')),
     ('u', 'user', '',
      _('record the specified user as committer'), _('USER')),
 ]
 
 templateopts = [
     ('', 'style', '',
      _('display using template map file'), _('STYLE')),
     ('', 'template', '',
      _('display with template'), _('TEMPLATE')),
 ]
 
 logopts = [
     ('p', 'patch', None, _('show patch')),
     ('g', 'git', None, _('use git extended diff format')),
     ('l', 'limit', '',
      _('limit number of changes displayed'), _('NUM')),
     ('M', 'no-merges', None, _('do not show merges')),
     ('', 'stat', None, _('output diffstat-style summary of changes')),
     ('G', 'graph', None, _("show the revision DAG")),
 ] + templateopts
 
 diffopts = [
     ('a', 'text', None, _('treat all files as text')),
     ('g', 'git', None, _('use git extended diff format')),
     ('', 'nodates', None, _('omit dates from diff headers'))
 ]
 
 diffwsopts = [
     ('w', 'ignore-all-space', None,
      _('ignore white space when comparing lines')),
     ('b', 'ignore-space-change', None,
      _('ignore changes in the amount of white space')),
     ('B', 'ignore-blank-lines', None,
      _('ignore changes whose lines are all blank')),
     ]
 
 diffopts2 = [
     ('p', 'show-function', None, _('show which function each change is in')),
     ('', 'reverse', None, _('produce a diff that undoes the changes')),
     ] + diffwsopts + [
     ('U', 'unified', '',
      _('number of lines of context to show'), _('NUM')),
     ('', 'stat', None, _('output diffstat-style summary of changes')),
 ]
 
 mergetoolopts = [
     ('t', 'tool', '', _('specify merge tool')),
 ]
 
 similarityopts = [
     ('s', 'similarity', '',
      _('guess renamed files by similarity (0<=s<=100)'), _('SIMILARITY'))
 ]
 
 subrepoopts = [
     ('S', 'subrepos', None,
      _('recurse into subrepositories'))
 ]
 
 # Commands start here, listed alphabetically
 
 @command('^add',
     walkopts + subrepoopts + dryrunopts,
     _('[OPTION]... [FILE]...'))
 def add(ui, repo, *pats, **opts):
     """add the specified files on the next commit
 
     Schedule files to be version controlled and added to the
     repository.
 
     The files will be added to the repository at the next commit. To
     undo an add before that, see :hg:`forget`.
 
     If no names are given, add all files to the repository.
 
     .. container:: verbose
 
        An example showing how new (unknown) files are added
        automatically by :hg:`add`::
 
          $ ls
          foo.c
          $ hg status
          ? foo.c
          $ hg add
          adding foo.c
          $ hg status
          A foo.c
 
     Returns 0 if all files are successfully added.
     """
 
     m = scmutil.match(repo[None], pats, opts)
     rejected = cmdutil.add(ui, repo, m, opts.get('dry_run'),
                            opts.get('subrepos'), prefix="", explicitonly=False)
     return rejected and 1 or 0
 
 @command('addremove',
     similarityopts + walkopts + dryrunopts,
     _('[OPTION]... [FILE]...'))
 def addremove(ui, repo, *pats, **opts):
     """add all new files, delete all missing files
 
     Add all new files and remove all missing files from the
     repository.
 
     New files are ignored if they match any of the patterns in
     ``.hgignore``. As with add, these changes take effect at the next
     commit.
 
     Use the -s/--similarity option to detect renamed files. This
     option takes a percentage between 0 (disabled) and 100 (files must
     be identical) as its parameter. With a parameter greater than 0,
     this compares every removed file with every added file and records
     those similar enough as renames. Detecting renamed files this way
     can be expensive. After using this option, :hg:`status -C` can be
     used to check which files were identified as moved or renamed. If
     not specified, -s/--similarity defaults to 100 and only renames of
     identical files are detected.
 
     Returns 0 if all files are successfully added.
     """
     try:
         sim = float(opts.get('similarity') or 100)
     except ValueError:
         raise util.Abort(_('similarity must be a number'))
     if sim < 0 or sim > 100:
         raise util.Abort(_('similarity must be between 0 and 100'))
     return scmutil.addremove(repo, pats, opts, similarity=sim / 100.0)
 
 @command('^annotate|blame',
     [('r', 'rev', '', _('annotate the specified revision'), _('REV')),
     ('', 'follow', None,
      _('follow copies/renames and list the filename (DEPRECATED)')),
     ('', 'no-follow', None, _("don't follow copies and renames")),
     ('a', 'text', None, _('treat all files as text')),
     ('u', 'user', None, _('list the author (long with -v)')),
     ('f', 'file', None, _('list the filename')),
     ('d', 'date', None, _('list the date (short with -q)')),
     ('n', 'number', None, _('list the revision number (default)')),
     ('c', 'changeset', None, _('list the changeset')),
     ('l', 'line-number', None, _('show line number at the first appearance'))
     ] + diffwsopts + walkopts,
     _('[-r REV] [-f] [-a] [-u] [-d] [-n] [-c] [-l] FILE...'))
 def annotate(ui, repo, *pats, **opts):
     """show changeset information by line for each file
 
     List changes in files, showing the revision id responsible for
     each line
 
     This command is useful for discovering when a change was made and
     by whom.
 
     Without the -a/--text option, annotate will avoid processing files
     it detects as binary. With -a, annotate will annotate the file
     anyway, although the results will probably be neither useful
     nor desirable.
 
     Returns 0 on success.
     """
     if opts.get('follow'):
         # --follow is deprecated and now just an alias for -f/--file
         # to mimic the behavior of Mercurial before version 1.5
         opts['file'] = True
 
     datefunc = ui.quiet and util.shortdate or util.datestr
     getdate = util.cachefunc(lambda x: datefunc(x[0].date()))
 
     if not pats:
         raise util.Abort(_('at least one filename or pattern is required'))
 
     hexfn = ui.debugflag and hex or short
 
     opmap = [('user', ' ', lambda x: ui.shortuser(x[0].user())),
              ('number', ' ', lambda x: str(x[0].rev())),
              ('changeset', ' ', lambda x: hexfn(x[0].node())),
              ('date', ' ', getdate),
              ('file', ' ', lambda x: x[0].path()),
              ('line_number', ':', lambda x: str(x[1])),
             ]
 
     if (not opts.get('user') and not opts.get('changeset')
         and not opts.get('date') and not opts.get('file')):
         opts['number'] = True
 
     linenumber = opts.get('line_number') is not None
     if linenumber and (not opts.get('changeset')) and (not opts.get('number')):
         raise util.Abort(_('at least one of -n/-c is required for -l'))
 
     funcmap = [(func, sep) for op, sep, func in opmap if opts.get(op)]
     funcmap[0] = (funcmap[0][0], '') # no separator in front of first column
 
     def bad(x, y):
         raise util.Abort("%s: %s" % (x, y))
 
     ctx = scmutil.revsingle(repo, opts.get('rev'))
     m = scmutil.match(ctx, pats, opts)
     m.bad = bad
     follow = not opts.get('no_follow')
     diffopts = patch.diffopts(ui, opts, section='annotate')
     for abs in ctx.walk(m):
         fctx = ctx[abs]
         if not opts.get('text') and util.binary(fctx.data()):
             ui.write(_("%s: binary file\n") % ((pats and m.rel(abs)) or abs))
             continue
 
         lines = fctx.annotate(follow=follow, linenumber=linenumber,
                               diffopts=diffopts)
         pieces = []
 
         for f, sep in funcmap:
             l = [f(n) for n, dummy in lines]
             if l:
                 sized = [(x, encoding.colwidth(x)) for x in l]
                 ml = max([w for x, w in sized])
                 pieces.append(["%s%s%s" % (sep, ' ' * (ml - w), x)
                                for x, w in sized])
 
         if pieces:
             for p, l in zip(zip(*pieces), lines):
                 ui.write("%s: %s" % ("".join(p), l[1]))
 
             if lines and not lines[-1][1].endswith('\n'):
                 ui.write('\n')
 
 @command('archive',
     [('', 'no-decode', None, _('do not pass files through decoders')),
     ('p', 'prefix', '', _('directory prefix for files in archive'),
      _('PREFIX')),
     ('r', 'rev', '', _('revision to distribute'), _('REV')),
     ('t', 'type', '', _('type of distribution to create'), _('TYPE')),
     ] + subrepoopts + walkopts,
     _('[OPTION]... DEST'))
 def archive(ui, repo, dest, **opts):
     '''create an unversioned archive of a repository revision
 
     By default, the revision used is the parent of the working
     directory; use -r/--rev to specify a different revision.
 
     The archive type is automatically detected based on file
     extension (or override using -t/--type).
 
     .. container:: verbose
 
       Examples:
 
       - create a zip file containing the 1.0 release::
 
           hg archive -r 1.0 project-1.0.zip
 
       - create a tarball excluding .hg files::
 
           hg archive project.tar.gz -X ".hg*"
 
     Valid types are:
 
     :``files``: a directory full of files (default)
     :``tar``:   tar archive, uncompressed
     :``tbz2``:  tar archive, compressed using bzip2
     :``tgz``:   tar archive, compressed using gzip
     :``uzip``:  zip archive, uncompressed
     :``zip``:   zip archive, compressed using deflate
 
     The exact name of the destination archive or directory is given
     using a format string; see :hg:`help export` for details.
 
     Each member added to an archive file has a directory prefix
     prepended. Use -p/--prefix to specify a format string for the
     prefix. The default is the basename of the archive, with suffixes
     removed.
 
     Returns 0 on success.
     '''
 
     ctx = scmutil.revsingle(repo, opts.get('rev'))
     if not ctx:
         raise util.Abort(_('no working directory: please specify a revision'))
     node = ctx.node()
     dest = cmdutil.makefilename(repo, dest, node)
     if os.path.realpath(dest) == repo.root:
         raise util.Abort(_('repository root cannot be destination'))
 
     kind = opts.get('type') or archival.guesskind(dest) or 'files'
     prefix = opts.get('prefix')
 
     if dest == '-':
         if kind == 'files':
             raise util.Abort(_('cannot archive plain files to stdout'))
         dest = cmdutil.makefileobj(repo, dest)
         if not prefix:
             prefix = os.path.basename(repo.root) + '-%h'
 
     prefix = cmdutil.makefilename(repo, prefix, node)
     matchfn = scmutil.match(ctx, [], opts)
     archival.archive(repo, dest, node, kind, not opts.get('no_decode'),
                      matchfn, prefix, subrepos=opts.get('subrepos'))
 
 @command('backout',
     [('', 'merge', None, _('merge with old dirstate parent after backout')),
     ('', 'parent', '',
      _('parent to choose when backing out merge (DEPRECATED)'), _('REV')),
     ('r', 'rev', '', _('revision to backout'), _('REV')),
     ] + mergetoolopts + walkopts + commitopts + commitopts2,
     _('[OPTION]... [-r] REV'))
 def backout(ui, repo, node=None, rev=None, **opts):
     '''reverse effect of earlier changeset
 
     Prepare a new changeset with the effect of REV undone in the
     current working directory.
 
     If REV is the parent of the working directory, then this new changeset
     is committed automatically. Otherwise, hg needs to merge the
     changes and the merged result is left uncommitted.
 
     .. note::
       backout cannot be used to fix either an unwanted or
       incorrect merge.
 
     .. container:: verbose
 
       By default, the pending changeset will have one parent,
       maintaining a linear history. With --merge, the pending
       changeset will instead have two parents: the old parent of the
       working directory and a new child of REV that simply undoes REV.
 
       Before version 1.7, the behavior without --merge was equivalent
       to specifying --merge followed by :hg:`update --clean .` to
       cancel the merge and leave the child of REV as a head to be
       merged separately.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success.
     '''
     if rev and node:
         raise util.Abort(_("please specify just one revision"))
 
     if not rev:
         rev = node
 
     if not rev:
         raise util.Abort(_("please specify a revision to backout"))
 
     date = opts.get('date')
     if date:
         opts['date'] = util.parsedate(date)
 
     cmdutil.bailifchanged(repo)
     node = scmutil.revsingle(repo, rev).node()
 
     op1, op2 = repo.dirstate.parents()
     a = repo.changelog.ancestor(op1, node)
     if a != node:
         raise util.Abort(_('cannot backout change on a different branch'))
 
     p1, p2 = repo.changelog.parents(node)
     if p1 == nullid:
         raise util.Abort(_('cannot backout a change with no parents'))
     if p2 != nullid:
         if not opts.get('parent'):
             raise util.Abort(_('cannot backout a merge changeset'))
         p = repo.lookup(opts['parent'])
         if p not in (p1, p2):
             raise util.Abort(_('%s is not a parent of %s') %
                              (short(p), short(node)))
         parent = p
     else:
         if opts.get('parent'):
             raise util.Abort(_('cannot use --parent on non-merge changeset'))
         parent = p1
 
     # the backout should appear on the same branch
     wlock = repo.wlock()
     try:
         branch = repo.dirstate.branch()
         hg.clean(repo, node, show_stats=False)
         repo.dirstate.setbranch(branch)
         revert_opts = opts.copy()
         revert_opts['date'] = None
         revert_opts['all'] = True
         revert_opts['rev'] = hex(parent)
         revert_opts['no_backup'] = None
         revert(ui, repo, **revert_opts)
         if not opts.get('merge') and op1 != node:
             try:
                 ui.setconfig('ui', 'forcemerge', opts.get('tool', ''))
                 return hg.update(repo, op1)
             finally:
                 ui.setconfig('ui', 'forcemerge', '')
 
         commit_opts = opts.copy()
         commit_opts['addremove'] = False
         if not commit_opts['message'] and not commit_opts['logfile']:
             # we don't translate commit messages
             commit_opts['message'] = "Backed out changeset %s" % short(node)
             commit_opts['force_editor'] = True
         commit(ui, repo, **commit_opts)
         def nice(node):
             return '%d:%s' % (repo.changelog.rev(node), short(node))
         ui.status(_('changeset %s backs out changeset %s\n') %
                   (nice(repo.changelog.tip()), nice(node)))
         if opts.get('merge') and op1 != node:
             hg.clean(repo, op1, show_stats=False)
             ui.status(_('merging with changeset %s\n')
                       % nice(repo.changelog.tip()))
             try:
                 ui.setconfig('ui', 'forcemerge', opts.get('tool', ''))
                 return hg.merge(repo, hex(repo.changelog.tip()))
             finally:
                 ui.setconfig('ui', 'forcemerge', '')
     finally:
         wlock.release()
     return 0
 
 @command('bisect',
     [('r', 'reset', False, _('reset bisect state')),
     ('g', 'good', False, _('mark changeset good')),
     ('b', 'bad', False, _('mark changeset bad')),
     ('s', 'skip', False, _('skip testing changeset')),
     ('e', 'extend', False, _('extend the bisect range')),
     ('c', 'command', '', _('use command to check changeset state'), _('CMD')),
     ('U', 'noupdate', False, _('do not update to target'))],
     _("[-gbsr] [-U] [-c CMD] [REV]"))
 def bisect(ui, repo, rev=None, extra=None, command=None,
                reset=None, good=None, bad=None, skip=None, extend=None,
                noupdate=None):
     """subdivision search of changesets
 
     This command helps to find changesets which introduce problems. To
     use, mark the earliest changeset you know exhibits the problem as
     bad, then mark the latest changeset which is free from the problem
     as good. Bisect will update your working directory to a revision
     for testing (unless the -U/--noupdate option is specified). Once
     you have performed tests, mark the working directory as good or
     bad, and bisect will either update to another candidate changeset
     or announce that it has found the bad revision.
 
     As a shortcut, you can also use the revision argument to mark a
     revision as good or bad without checking it out first.
 
     If you supply a command, it will be used for automatic bisection.
     The environment variable HG_NODE will contain the ID of the
     changeset being tested. The exit status of the command will be
     used to mark revisions as good or bad: status 0 means good, 125
     means to skip the revision, 127 (command not found) will abort the
     bisection, and any other non-zero exit status means the revision
     is bad.
 
     .. container:: verbose
 
       Some examples:
 
       - start a bisection with known bad revision 12, and good revision 34::
 
           hg bisect --bad 34
           hg bisect --good 12
 
       - advance the current bisection by marking current revision as good or
         bad::
 
           hg bisect --good
           hg bisect --bad
 
       - mark the current revision, or a known revision, to be skipped (e.g. if
         that revision is not usable because of another issue)::
 
           hg bisect --skip
           hg bisect --skip 23
 
       - forget the current bisection::
 
           hg bisect --reset
 
       - use 'make && make tests' to automatically find the first broken
         revision::
 
           hg bisect --reset
           hg bisect --bad 34
           hg bisect --good 12
           hg bisect --command 'make && make tests'
 
       - see all changesets whose states are already known in the current
         bisection::
 
           hg log -r "bisect(pruned)"
 
       - see the changeset currently being bisected (especially useful
         if running with -U/--noupdate)::
 
           hg log -r "bisect(current)"
 
       - see all changesets that took part in the current bisection::
 
           hg log -r "bisect(range)"
 
       - with the graphlog extension, you can even get a nice graph::
 
           hg log --graph -r "bisect(range)"
 
       See :hg:`help revsets` for more about the `bisect()` keyword.
 
     Returns 0 on success.
     """
     def extendbisectrange(nodes, good):
         # bisect is incomplete when it ends on a merge node and
         # one of the parent was not checked.
         parents = repo[nodes[0]].parents()
         if len(parents) > 1:
             side = good and state['bad'] or state['good']
             num = len(set(i.node() for i in parents) & set(side))
             if num == 1:
                 return parents[0].ancestor(parents[1])
         return None
 
     def print_result(nodes, good):
         displayer = cmdutil.show_changeset(ui, repo, {})
         if len(nodes) == 1:
             # narrowed it down to a single revision
             if good:
                 ui.write(_("The first good revision is:\n"))
             else:
                 ui.write(_("The first bad revision is:\n"))
             displayer.show(repo[nodes[0]])
             extendnode = extendbisectrange(nodes, good)
             if extendnode is not None:
                 ui.write(_('Not all ancestors of this changeset have been'
                            ' checked.\nUse bisect --extend to continue the '
                            'bisection from\nthe common ancestor, %s.\n')
                          % extendnode)
         else:
             # multiple possible revisions
             if good:
                 ui.write(_("Due to skipped revisions, the first "
                         "good revision could be any of:\n"))
             else:
                 ui.write(_("Due to skipped revisions, the first "
                         "bad revision could be any of:\n"))
             for n in nodes:
                 displayer.show(repo[n])
         displayer.close()
 
     def check_state(state, interactive=True):
         if not state['good'] or not state['bad']:
             if (good or bad or skip or reset) and interactive:
                 return
             if not state['good']:
                 raise util.Abort(_('cannot bisect (no known good revisions)'))
             else:
                 raise util.Abort(_('cannot bisect (no known bad revisions)'))
         return True
 
     # backward compatibility
     if rev in "good bad reset init".split():
         ui.warn(_("(use of 'hg bisect <cmd>' is deprecated)\n"))
         cmd, rev, extra = rev, extra, None
         if cmd == "good":
             good = True
         elif cmd == "bad":
             bad = True
         else:
             reset = True
     elif extra or good + bad + skip + reset + extend + bool(command) > 1:
         raise util.Abort(_('incompatible arguments'))
 
     if reset:
         p = repo.join("bisect.state")
         if os.path.exists(p):
             os.unlink(p)
         return
 
     state = hbisect.load_state(repo)
 
     if command:
         changesets = 1
         try:
             node = state['current'][0]
         except LookupError:
             if noupdate:
                 raise util.Abort(_('current bisect revision is unknown - '
                                    'start a new bisect to fix'))
             node, p2 = repo.dirstate.parents()
             if p2 != nullid:
                 raise util.Abort(_('current bisect revision is a merge'))
         try:
             while changesets:
                 # update state
                 state['current'] = [node]
                 hbisect.save_state(repo, state)
                 status = util.system(command,
                                      environ={'HG_NODE': hex(node)},
                                      out=ui.fout)
                 if status == 125:
                     transition = "skip"
                 elif status == 0:
                     transition = "good"
                 # status < 0 means process was killed
                 elif status == 127:
                     raise util.Abort(_("failed to execute %s") % command)
                 elif status < 0:
                     raise util.Abort(_("%s killed") % command)
                 else:
                     transition = "bad"
                 ctx = scmutil.revsingle(repo, rev, node)
                 rev = None # clear for future iterations
                 state[transition].append(ctx.node())
                 ui.status(_('changeset %d:%s: %s\n') % (ctx, ctx, transition))
                 check_state(state, interactive=False)
                 # bisect
                 nodes, changesets, good = hbisect.bisect(repo.changelog, state)
                 # update to next check
                 node = nodes[0]
                 if not noupdate:
                     cmdutil.bailifchanged(repo)
                     hg.clean(repo, node, show_stats=False)
         finally:
             state['current'] = [node]
             hbisect.save_state(repo, state)
         print_result(nodes, good)
         return
 
     # update state
 
     if rev:
         nodes = [repo.lookup(i) for i in scmutil.revrange(repo, [rev])]
     else:
         nodes = [repo.lookup('.')]
 
     if good or bad or skip:
         if good:
             state['good'] += nodes
         elif bad:
             state['bad'] += nodes
         elif skip:
             state['skip'] += nodes
         hbisect.save_state(repo, state)
 
     if not check_state(state):
         return
 
     # actually bisect
     nodes, changesets, good = hbisect.bisect(repo.changelog, state)
     if extend:
         if not changesets:
             extendnode = extendbisectrange(nodes, good)
             if extendnode is not None:
                 ui.write(_("Extending search to changeset %d:%s\n"
                          % (extendnode.rev(), extendnode)))
                 state['current'] = [extendnode.node()]
                 hbisect.save_state(repo, state)
                 if noupdate:
                     return
                 cmdutil.bailifchanged(repo)
                 return hg.clean(repo, extendnode.node())
         raise util.Abort(_("nothing to extend"))
 
     if changesets == 0:
         print_result(nodes, good)
     else:
         assert len(nodes) == 1 # only a single node can be tested next
         node = nodes[0]
         # compute the approximate number of remaining tests
         tests, size = 0, 2
         while size <= changesets:
             tests, size = tests + 1, size * 2
         rev = repo.changelog.rev(node)
         ui.write(_("Testing changeset %d:%s "
                    "(%d changesets remaining, ~%d tests)\n")
                  % (rev, short(node), changesets, tests))
         state['current'] = [node]
         hbisect.save_state(repo, state)
         if not noupdate:
             cmdutil.bailifchanged(repo)
             return hg.clean(repo, node)
 
 @command('bookmarks',
     [('f', 'force', False, _('force')),
     ('r', 'rev', '', _('revision'), _('REV')),
     ('d', 'delete', False, _('delete a given bookmark')),
     ('m', 'rename', '', _('rename a given bookmark'), _('NAME')),
     ('i', 'inactive', False, _('mark a bookmark inactive'))],
     _('hg bookmarks [-f] [-d] [-i] [-m NAME] [-r REV] [NAME]'))
 def bookmark(ui, repo, mark=None, rev=None, force=False, delete=False,
              rename=None, inactive=False):
     '''track a line of development with movable markers
 
     Bookmarks are pointers to certain commits that move when committing.
     Bookmarks are local. They can be renamed, copied and deleted. It is
     possible to use :hg:`merge NAME` to merge from a given bookmark, and
     :hg:`update NAME` to update to a given bookmark.
 
     You can use :hg:`bookmark NAME` to set a bookmark on the working
     directory's parent revision with the given name. If you specify
     a revision using -r REV (where REV may be an existing bookmark),
     the bookmark is assigned to that revision.
 
     Bookmarks can be pushed and pulled between repositories (see :hg:`help
     push` and :hg:`help pull`). This requires both the local and remote
     repositories to support bookmarks. For versions prior to 1.8, this means
     the bookmarks extension must be enabled.
 
     With -i/--inactive, the new bookmark will not be made the active
     bookmark. If -r/--rev is given, the new bookmark will not be made
     active even if -i/--inactive is not given. If no NAME is given, the
     current active bookmark will be marked inactive.
     '''
     hexfn = ui.debugflag and hex or short
     marks = repo._bookmarks
     cur   = repo.changectx('.').node()
 
     def checkformat(mark):
         mark = mark.strip()
         if not mark:
             raise util.Abort(_("bookmark names cannot consist entirely of "
                                "whitespace"))
         scmutil.checknewlabel(repo, mark, 'bookmark')
         return mark
 
     def checkconflict(repo, mark, force=False):
         if mark in marks and not force:
             raise util.Abort(_("bookmark '%s' already exists "
                                "(use -f to force)") % mark)
         if ((mark in repo.branchmap() or mark == repo.dirstate.branch())
             and not force):
             raise util.Abort(
                 _("a bookmark cannot have the name of an existing branch"))
 
     if delete and rename:
         raise util.Abort(_("--delete and --rename are incompatible"))
     if delete and rev:
         raise util.Abort(_("--rev is incompatible with --delete"))
     if rename and rev:
         raise util.Abort(_("--rev is incompatible with --rename"))
     if mark is None and (delete or rev):
         raise util.Abort(_("bookmark name required"))
 
     if delete:
         if mark not in marks:
             raise util.Abort(_("bookmark '%s' does not exist") % mark)
         if mark == repo._bookmarkcurrent:
             bookmarks.setcurrent(repo, None)
         del marks[mark]
         bookmarks.write(repo)
 
     elif rename:
         if mark is None:
             raise util.Abort(_("new bookmark name required"))
         mark = checkformat(mark)
         if rename not in marks:
             raise util.Abort(_("bookmark '%s' does not exist") % rename)
         checkconflict(repo, mark, force)
         marks[mark] = marks[rename]
         if repo._bookmarkcurrent == rename and not inactive:
             bookmarks.setcurrent(repo, mark)
         del marks[rename]
         bookmarks.write(repo)
 
     elif mark is not None:
         mark = checkformat(mark)
         if inactive and mark == repo._bookmarkcurrent:
             bookmarks.setcurrent(repo, None)
             return
         checkconflict(repo, mark, force)
         if rev:
             marks[mark] = scmutil.revsingle(repo, rev).node()
         else:
             marks[mark] = cur
         if not inactive and cur == marks[mark]:
             bookmarks.setcurrent(repo, mark)
         bookmarks.write(repo)
 
     # Same message whether trying to deactivate the current bookmark (-i
     # with no NAME) or listing bookmarks
     elif len(marks) == 0:
         ui.status(_("no bookmarks set\n"))
 
     elif inactive:
         if not repo._bookmarkcurrent:
             ui.status(_("no active bookmark\n"))
         else:
             bookmarks.setcurrent(repo, None)
 
     else: # show bookmarks
         for bmark, n in sorted(marks.iteritems()):
             current = repo._bookmarkcurrent
             if bmark == current and n == cur:
                 prefix, label = '*', 'bookmarks.current'
             else:
                 prefix, label = ' ', ''
 
             if ui.quiet:
                 ui.write("%s\n" % bmark, label=label)
             else:
                 ui.write(" %s %-25s %d:%s\n" % (
                     prefix, bmark, repo.changelog.rev(n), hexfn(n)),
                     label=label)
 
 @command('branch',
     [('f', 'force', None,
      _('set branch name even if it shadows an existing branch')),
     ('C', 'clean', None, _('reset branch name to parent branch name'))],
     _('[-fC] [NAME]'))
 def branch(ui, repo, label=None, **opts):
     """set or show the current branch name
 
     .. note::
        Branch names are permanent and global. Use :hg:`bookmark` to create a
        light-weight bookmark instead. See :hg:`help glossary` for more
        information about named branches and bookmarks.
 
     With no argument, show the current branch name. With one argument,
     set the working directory branch name (the branch will not exist
     in the repository until the next commit). Standard practice
     recommends that primary development take place on the 'default'
     branch.
 
     Unless -f/--force is specified, branch will not let you set a
     branch name that already exists, even if it's inactive.
 
     Use -C/--clean to reset the working directory branch to that of
     the parent of the working directory, negating a previous branch
     change.
 
     Use the command :hg:`update` to switch to an existing branch. Use
     :hg:`commit --close-branch` to mark this branch as closed.
 
     Returns 0 on success.
     """
     if not opts.get('clean') and not label:
         ui.write("%s\n" % repo.dirstate.branch())
         return
 
     wlock = repo.wlock()
     try:
         if opts.get('clean'):
             label = repo[None].p1().branch()
             repo.dirstate.setbranch(label)
             ui.status(_('reset working directory to branch %s\n') % label)
         elif label:
             if not opts.get('force') and label in repo.branchmap():
                 if label not in [p.branch() for p in repo.parents()]:
                     raise util.Abort(_('a branch of the same name already'
                                        ' exists'),
                                      # i18n: "it" refers to an existing branch
                                      hint=_("use 'hg update' to switch to it"))
             repo.dirstate.setbranch(label)
             ui.status(_('marked working directory as branch %s\n') % label)
             ui.status(_('(branches are permanent and global, '
                         'did you want a bookmark?)\n'))
     finally:
         wlock.release()
 
 @command('branches',
     [('a', 'active', False, _('show only branches that have unmerged heads')),
     ('c', 'closed', False, _('show normal and closed branches'))],
     _('[-ac]'))
 def branches(ui, repo, active=False, closed=False):
     """list repository named branches
 
     List the repository's named branches, indicating which ones are
     inactive. If -c/--closed is specified, also list branches which have
     been marked closed (see :hg:`commit --close-branch`).
 
     If -a/--active is specified, only show active branches. A branch
     is considered active if it contains repository heads.
 
     Use the command :hg:`update` to switch to an existing branch.
 
     Returns 0.
     """
 
     hexfunc = ui.debugflag and hex or short
 
     activebranches = set([repo[n].branch() for n in repo.heads()])
     branches = []
     for tag, heads in repo.branchmap().iteritems():
         for h in reversed(heads):
             ctx = repo[h]
             isopen = not ctx.closesbranch()
             if isopen:
                 tip = ctx
                 break
         else:
             tip = repo[heads[-1]]
         isactive = tag in activebranches and isopen
         branches.append((tip, isactive, isopen))
     branches.sort(key=lambda i: (i[1], i[0].rev(), i[0].branch(), i[2]),
                   reverse=True)
 
     for ctx, isactive, isopen in branches:
         if (not active) or isactive:
             if isactive:
                 label = 'branches.active'
                 notice = ''
             elif not isopen:
                 if not closed:
                     continue
                 label = 'branches.closed'
                 notice = _(' (closed)')
             else:
                 label = 'branches.inactive'
                 notice = _(' (inactive)')
             if ctx.branch() == repo.dirstate.branch():
                 label = 'branches.current'
             rev = str(ctx.rev()).rjust(31 - encoding.colwidth(ctx.branch()))
             rev = ui.label('%s:%s' % (rev, hexfunc(ctx.node())),
                            'log.changeset changeset.%s' % ctx.phasestr())
             tag = ui.label(ctx.branch(), label)
             if ui.quiet:
                 ui.write("%s\n" % tag)
             else:
                 ui.write("%s %s%s\n" % (tag, rev, notice))
 
 @command('bundle',
     [('f', 'force', None, _('run even when the destination is unrelated')),
     ('r', 'rev', [], _('a changeset intended to be added to the destination'),
      _('REV')),
     ('b', 'branch', [], _('a specific branch you would like to bundle'),
      _('BRANCH')),
     ('', 'base', [],
      _('a base changeset assumed to be available at the destination'),
      _('REV')),
     ('a', 'all', None, _('bundle all changesets in the repository')),
     ('t', 'type', 'bzip2', _('bundle compression type to use'), _('TYPE')),
     ] + remoteopts,
     _('[-f] [-t TYPE] [-a] [-r REV]... [--base REV]... FILE [DEST]'))
 def bundle(ui, repo, fname, dest=None, **opts):
     """create a changegroup file
 
     Generate a compressed changegroup file collecting changesets not
     known to be in another repository.
 
     If you omit the destination repository, then hg assumes the
     destination will have all the nodes you specify with --base
     parameters. To create a bundle containing all changesets, use
     -a/--all (or --base null).
 
     You can change compression method with the -t/--type option.
     The available compression methods are: none, bzip2, and
     gzip (by default, bundles are compressed using bzip2).
 
     The bundle file can then be transferred using conventional means
     and applied to another repository with the unbundle or pull
     command. This is useful when direct push and pull are not
     available or when exporting an entire repository is undesirable.
 
     Applying bundles preserves all changeset contents including
     permissions, copy/rename information, and revision history.
 
     Returns 0 on success, 1 if no changes found.
     """
     revs = None
     if 'rev' in opts:
         revs = scmutil.revrange(repo, opts['rev'])
 
     bundletype = opts.get('type', 'bzip2').lower()
     btypes = {'none': 'HG10UN', 'bzip2': 'HG10BZ', 'gzip': 'HG10GZ'}
     bundletype = btypes.get(bundletype)
     if bundletype not in changegroup.bundletypes:
         raise util.Abort(_('unknown bundle type specified with --type'))
 
     if opts.get('all'):
         base = ['null']
     else:
         base = scmutil.revrange(repo, opts.get('base'))
     if base:
         if dest:
             raise util.Abort(_("--base is incompatible with specifying "
                                "a destination"))
         common = [repo.lookup(rev) for rev in base]
         heads = revs and map(repo.lookup, revs) or revs
         cg = repo.getbundle('bundle', heads=heads, common=common)
         outgoing = None
     else:
         dest = ui.expandpath(dest or 'default-push', dest or 'default')
         dest, branches = hg.parseurl(dest, opts.get('branch'))
         other = hg.peer(repo, opts, dest)
         revs, checkout = hg.addbranchrevs(repo, other, branches, revs)
         heads = revs and map(repo.lookup, revs) or revs
         outgoing = discovery.findcommonoutgoing(repo, other,
                                                 onlyheads=heads,
                                                 force=opts.get('force'),
                                                 portable=True)
         cg = repo.getlocalbundle('bundle', outgoing)
     if not cg:
         scmutil.nochangesfound(ui, repo, outgoing and outgoing.excluded)
         return 1
 
     changegroup.writebundle(cg, fname, bundletype)
 
 @command('cat',
     [('o', 'output', '',
      _('print output to file with formatted name'), _('FORMAT')),
     ('r', 'rev', '', _('print the given revision'), _('REV')),
     ('', 'decode', None, _('apply any matching decode filter')),
     ] + walkopts,
     _('[OPTION]... FILE...'))
 def cat(ui, repo, file1, *pats, **opts):
     """output the current or given revision of files
 
     Print the specified files as they were at the given revision. If
     no revision is given, the parent of the working directory is used,
     or tip if no revision is checked out.
 
     Output may be to a file, in which case the name of the file is
     given using a format string. The formatting rules are the same as
     for the export command, with the following additions:
 
     :``%s``: basename of file being printed
     :``%d``: dirname of file being printed, or '.' if in repository root
     :``%p``: root-relative path name of file being printed
 
     Returns 0 on success.
     """
     ctx = scmutil.revsingle(repo, opts.get('rev'))
     err = 1
     m = scmutil.match(ctx, (file1,) + pats, opts)
     for abs in ctx.walk(m):
         fp = cmdutil.makefileobj(repo, opts.get('output'), ctx.node(),
                                  pathname=abs)
         data = ctx[abs].data()
         if opts.get('decode'):
             data = repo.wwritedata(abs, data)
         fp.write(data)
         fp.close()
         err = 0
     return err
 
 @command('^clone',
     [('U', 'noupdate', None,
      _('the clone will include an empty working copy (only a repository)')),
     ('u', 'updaterev', '', _('revision, tag or branch to check out'), _('REV')),
     ('r', 'rev', [], _('include the specified changeset'), _('REV')),
     ('b', 'branch', [], _('clone only the specified branch'), _('BRANCH')),
     ('', 'pull', None, _('use pull protocol to copy metadata')),
     ('', 'uncompressed', None, _('use uncompressed transfer (fast over LAN)')),
     ] + remoteopts,
     _('[OPTION]... SOURCE [DEST]'))
 def clone(ui, source, dest=None, **opts):
     """make a copy of an existing repository
 
     Create a copy of an existing repository in a new directory.
 
     If no destination directory name is specified, it defaults to the
     basename of the source.
 
     The location of the source is added to the new repository's
     ``.hg/hgrc`` file, as the default to be used for future pulls.
 
     Only local paths and ``ssh://`` URLs are supported as
     destinations. For ``ssh://`` destinations, no working directory or
     ``.hg/hgrc`` will be created on the remote side.
 
     To pull only a subset of changesets, specify one or more revisions
     identifiers with -r/--rev or branches with -b/--branch. The
     resulting clone will contain only the specified changesets and
     their ancestors. These options (or 'clone src#rev dest') imply
     --pull, even for local source repositories. Note that specifying a
     tag will include the tagged changeset but not the changeset
     containing the tag.
 
     To check out a particular version, use -u/--update, or
     -U/--noupdate to create a clone with no working directory.
 
     .. container:: verbose
 
       For efficiency, hardlinks are used for cloning whenever the
       source and destination are on the same filesystem (note this
       applies only to the repository data, not to the working
       directory). Some filesystems, such as AFS, implement hardlinking
       incorrectly, but do not report errors. In these cases, use the
       --pull option to avoid hardlinking.
 
       In some cases, you can clone repositories and the working
       directory using full hardlinks with ::
 
         $ cp -al REPO REPOCLONE
 
       This is the fastest way to clone, but it is not always safe. The
       operation is not atomic (making sure REPO is not modified during
       the operation is up to you) and you have to make sure your
       editor breaks hardlinks (Emacs and most Linux Kernel tools do
       so). Also, this is not compatible with certain extensions that
       place their metadata under the .hg directory, such as mq.
 
       Mercurial will update the working directory to the first applicable
       revision from this list:
 
       a) null if -U or the source repository has no changesets
       b) if -u . and the source repository is local, the first parent of
          the source repository's working directory
       c) the changeset specified with -u (if a branch name, this means the
          latest head of that branch)
       d) the changeset specified with -r
       e) the tipmost head specified with -b
       f) the tipmost head specified with the url#branch source syntax
       g) the tipmost head of the default branch
       h) tip
 
       Examples:
 
       - clone a remote repository to a new directory named hg/::
 
           hg clone http://selenic.com/hg
 
       - create a lightweight local clone::
 
           hg clone project/ project-feature/
 
       - clone from an absolute path on an ssh server (note double-slash)::
 
           hg clone ssh://user@server//home/projects/alpha/
 
       - do a high-speed clone over a LAN while checking out a
         specified version::
 
           hg clone --uncompressed http://server/repo -u 1.5
 
       - create a repository without changesets after a particular revision::
 
           hg clone -r 04e544 experimental/ good/
 
       - clone (and track) a particular named branch::
 
           hg clone http://selenic.com/hg#stable
 
     See :hg:`help urls` for details on specifying URLs.
 
     Returns 0 on success.
     """
     if opts.get('noupdate') and opts.get('updaterev'):
         raise util.Abort(_("cannot specify both --noupdate and --updaterev"))
 
     r = hg.clone(ui, opts, source, dest,
                  pull=opts.get('pull'),
                  stream=opts.get('uncompressed'),
                  rev=opts.get('rev'),
                  update=opts.get('updaterev') or not opts.get('noupdate'),
                  branch=opts.get('branch'))
 
     return r is None
 
 @command('^commit|ci',
     [('A', 'addremove', None,
      _('mark new/missing files as added/removed before committing')),
     ('', 'close-branch', None,
      _('mark a branch as closed, hiding it from the branch list')),
     ('', 'amend', None, _('amend the parent of the working dir')),
     ] + walkopts + commitopts + commitopts2 + subrepoopts,
     _('[OPTION]... [FILE]...'))
 def commit(ui, repo, *pats, **opts):
     """commit the specified files or all outstanding changes
 
     Commit changes to the given files into the repository. Unlike a
     centralized SCM, this operation is a local operation. See
     :hg:`push` for a way to actively distribute your changes.
 
     If a list of files is omitted, all changes reported by :hg:`status`
     will be committed.
 
     If you are committing the result of a merge, do not provide any
     filenames or -I/-X filters.
 
     If no commit message is specified, Mercurial starts your
     configured editor where you can enter a message. In case your
     commit fails, you will find a backup of your message in
     ``.hg/last-message.txt``.
 
     The --amend flag can be used to amend the parent of the
     working directory with a new commit that contains the changes
     in the parent in addition to those currently reported by :hg:`status`,
     if there are any. The old commit is stored in a backup bundle in
     ``.hg/strip-backup`` (see :hg:`help bundle` and :hg:`help unbundle`
     on how to restore it).
 
     Message, user and date are taken from the amended commit unless
     specified. When a message isn't specified on the command line,
     the editor will open with the message of the amended commit.
 
     It is not possible to amend public changesets (see :hg:`help phases`)
     or changesets that have children.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success, 1 if nothing changed.
     """
     if opts.get('subrepos'):
         # Let --subrepos on the command line override config setting.
         ui.setconfig('ui', 'commitsubrepos', True)
 
     extra = {}
     if opts.get('close_branch'):
         if repo['.'].node() not in repo.branchheads():
             # The topo heads set is included in the branch heads set of the
             # current branch, so it's sufficient to test branchheads
             raise util.Abort(_('can only close branch heads'))
         extra['close'] = 1
 
     branch = repo[None].branch()
     bheads = repo.branchheads(branch)
 
     if opts.get('amend'):
         if ui.configbool('ui', 'commitsubrepos'):
             raise util.Abort(_('cannot amend recursively'))
 
         old = repo['.']
         if old.phase() == phases.public:
             raise util.Abort(_('cannot amend public changesets'))
         if len(old.parents()) > 1:
             raise util.Abort(_('cannot amend merge changesets'))
         if len(repo[None].parents()) > 1:
             raise util.Abort(_('cannot amend while merging'))
         if old.children():
             raise util.Abort(_('cannot amend changeset with children'))
 
         e = cmdutil.commiteditor
         if opts.get('force_editor'):
             e = cmdutil.commitforceeditor
 
         def commitfunc(ui, repo, message, match, opts):
             editor = e
             # message contains text from -m or -l, if it's empty,
             # open the editor with the old message
             if not message:
                 message = old.description()
                 editor = cmdutil.commitforceeditor
             return repo.commit(message,
                                opts.get('user') or old.user(),
                                opts.get('date') or old.date(),
                                match,
                                editor=editor,
                                extra=extra)
 
         current = repo._bookmarkcurrent
         marks = old.bookmarks()
         node = cmdutil.amend(ui, repo, commitfunc, old, extra, pats, opts)
         if node == old.node():
             ui.status(_("nothing changed\n"))
             return 1
         elif marks:
             ui.debug('moving bookmarks %r from %s to %s\n' %
                      (marks, old.hex(), hex(node)))
             for bm in marks:
                 repo._bookmarks[bm] = node
                 if bm == current:
                     bookmarks.setcurrent(repo, bm)
             bookmarks.write(repo)
     else:
         e = cmdutil.commiteditor
         if opts.get('force_editor'):
             e = cmdutil.commitforceeditor
 
         def commitfunc(ui, repo, message, match, opts):
             return repo.commit(message, opts.get('user'), opts.get('date'),
                                match, editor=e, extra=extra)
 
         node = cmdutil.commit(ui, repo, commitfunc, pats, opts)
 
         if not node:
             stat = repo.status(match=scmutil.match(repo[None], pats, opts))
             if stat[3]:
                 ui.status(_("nothing changed (%d missing files, see "
                             "'hg status')\n") % len(stat[3]))
             else:
                 ui.status(_("nothing changed\n"))
             return 1
 
     ctx = repo[node]
     parents = ctx.parents()
 
     if (not opts.get('amend') and bheads and node not in bheads and not
         [x for x in parents if x.node() in bheads and x.branch() == branch]):
         ui.status(_('created new head\n'))
         # The message is not printed for initial roots. For the other
         # changesets, it is printed in the following situations:
         #
         # Par column: for the 2 parents with ...
         #   N: null or no parent
         #   B: parent is on another named branch
         #   C: parent is a regular non head changeset
         #   H: parent was a branch head of the current branch
         # Msg column: whether we print "created new head" message
         # In the following, it is assumed that there already exists some
         # initial branch heads of the current branch, otherwise nothing is
         # printed anyway.
         #
         # Par Msg Comment
         # N N  y  additional topo root
         #
         # B N  y  additional branch root
         # C N  y  additional topo head
         # H N  n  usual case
         #
         # B B  y  weird additional branch root
         # C B  y  branch merge
         # H B  n  merge with named branch
         #
         # C C  y  additional head from merge
         # C H  n  merge with a head
         #
         # H H  n  head merge: head count decreases
 
     if not opts.get('close_branch'):
         for r in parents:
             if r.closesbranch() and r.branch() == branch:
                 ui.status(_('reopening closed branch head %d\n') % r)
 
     if ui.debugflag:
         ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx.hex()))
     elif ui.verbose:
         ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx))
 
 @command('copy|cp',
     [('A', 'after', None, _('record a copy that has already occurred')),
     ('f', 'force', None, _('forcibly copy over an existing managed file')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... [SOURCE]... DEST'))
 def copy(ui, repo, *pats, **opts):
     """mark files as copied for the next commit
 
     Mark dest as having copies of source files. If dest is a
     directory, copies are put in that directory. If dest is a file,
     the source must be a single file.
 
     By default, this command copies the contents of files as they
     exist in the working directory. If invoked with -A/--after, the
     operation is recorded, but no copying is performed.
 
     This command takes effect with the next commit. To undo a copy
     before that, see :hg:`revert`.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     wlock = repo.wlock(False)
     try:
         return cmdutil.copy(ui, repo, pats, opts)
     finally:
         wlock.release()
 
 @command('debugancestor', [], _('[INDEX] REV1 REV2'))
 def debugancestor(ui, repo, *args):
     """find the ancestor revision of two revisions in a given index"""
     if len(args) == 3:
         index, rev1, rev2 = args
         r = revlog.revlog(scmutil.opener(os.getcwd(), audit=False), index)
         lookup = r.lookup
     elif len(args) == 2:
         if not repo:
             raise util.Abort(_("there is no Mercurial repository here "
                                "(.hg not found)"))
         rev1, rev2 = args
         r = repo.changelog
         lookup = repo.lookup
     else:
         raise util.Abort(_('either two or three arguments required'))
     a = r.ancestor(lookup(rev1), lookup(rev2))
     ui.write("%d:%s\n" % (r.rev(a), hex(a)))
 
 @command('debugbuilddag',
     [('m', 'mergeable-file', None, _('add single file mergeable changes')),
     ('o', 'overwritten-file', None, _('add single file all revs overwrite')),
     ('n', 'new-file', None, _('add new file at each rev'))],
     _('[OPTION]... [TEXT]'))
 def debugbuilddag(ui, repo, text=None,
                   mergeable_file=False,
                   overwritten_file=False,
                   new_file=False):
     """builds a repo with a given DAG from scratch in the current empty repo
 
     The description of the DAG is read from stdin if not given on the
     command line.
 
     Elements:
 
      - "+n" is a linear run of n nodes based on the current default parent
      - "." is a single node based on the current default parent
      - "$" resets the default parent to null (implied at the start);
            otherwise the default parent is always the last node created
      - "<p" sets the default parent to the backref p
      - "*p" is a fork at parent p, which is a backref
      - "*p1/p2" is a merge of parents p1 and p2, which are backrefs
      - "/p2" is a merge of the preceding node and p2
      - ":tag" defines a local tag for the preceding node
      - "@branch" sets the named branch for subsequent nodes
      - "#...\\n" is a comment up to the end of the line
 
     Whitespace between the above elements is ignored.
 
     A backref is either
 
      - a number n, which references the node curr-n, where curr is the current
        node, or
      - the name of a local tag you placed earlier using ":tag", or
      - empty to denote the default parent.
 
     All string valued-elements are either strictly alphanumeric, or must
     be enclosed in double quotes ("..."), with "\\" as escape character.
     """
 
     if text is None:
         ui.status(_("reading DAG from stdin\n"))
         text = ui.fin.read()
 
     cl = repo.changelog
     if len(cl) > 0:
         raise util.Abort(_('repository is not empty'))
 
     # determine number of revs in DAG
     total = 0
     for type, data in dagparser.parsedag(text):
         if type == 'n':
             total += 1
 
     if mergeable_file:
         linesperrev = 2
         # make a file with k lines per rev
         initialmergedlines = [str(i) for i in xrange(0, total * linesperrev)]
         initialmergedlines.append("")
 
     tags = []
 
     lock = tr = None
     try:
         lock = repo.lock()
         tr = repo.transaction("builddag")
 
         at = -1
         atbranch = 'default'
         nodeids = []
         id = 0
         ui.progress(_('building'), id, unit=_('revisions'), total=total)
         for type, data in dagparser.parsedag(text):
             if type == 'n':
                 ui.note('node %s\n' % str(data))
                 id, ps = data
 
                 files = []
                 fctxs = {}
 
                 p2 = None
                 if mergeable_file:
                     fn = "mf"
                     p1 = repo[ps[0]]
                     if len(ps) > 1:
                         p2 = repo[ps[1]]
                         pa = p1.ancestor(p2)
                         base, local, other = [x[fn].data() for x in pa, p1, p2]
                         m3 = simplemerge.Merge3Text(base, local, other)
                         ml = [l.strip() for l in m3.merge_lines()]
                         ml.append("")
                     elif at > 0:
                         ml = p1[fn].data().split("\n")
                     else:
                         ml = initialmergedlines
                     ml[id * linesperrev] += " r%i" % id
                     mergedtext = "\n".join(ml)
                     files.append(fn)
                     fctxs[fn] = context.memfilectx(fn, mergedtext)
 
                 if overwritten_file:
                     fn = "of"
                     files.append(fn)
                     fctxs[fn] = context.memfilectx(fn, "r%i\n" % id)
 
                 if new_file:
                     fn = "nf%i" % id
                     files.append(fn)
                     fctxs[fn] = context.memfilectx(fn, "r%i\n" % id)
                     if len(ps) > 1:
                         if not p2:
                             p2 = repo[ps[1]]
                         for fn in p2:
                             if fn.startswith("nf"):
                                 files.append(fn)
                                 fctxs[fn] = p2[fn]
 
                 def fctxfn(repo, cx, path):
                     return fctxs.get(path)
 
                 if len(ps) == 0 or ps[0] < 0:
                     pars = [None, None]
                 elif len(ps) == 1:
                     pars = [nodeids[ps[0]], None]
                 else:
                     pars = [nodeids[p] for p in ps]
                 cx = context.memctx(repo, pars, "r%i" % id, files, fctxfn,
                                     date=(id, 0),
                                     user="debugbuilddag",
                                     extra={'branch': atbranch})
                 nodeid = repo.commitctx(cx)
                 nodeids.append(nodeid)
                 at = id
             elif type == 'l':
                 id, name = data
                 ui.note('tag %s\n' % name)
                 tags.append("%s %s\n" % (hex(repo.changelog.node(id)), name))
             elif type == 'a':
                 ui.note('branch %s\n' % data)
                 atbranch = data
             ui.progress(_('building'), id, unit=_('revisions'), total=total)
         tr.close()
 
         if tags:
             repo.opener.write("localtags", "".join(tags))
     finally:
         ui.progress(_('building'), None)
         release(tr, lock)
 
 @command('debugbundle', [('a', 'all', None, _('show all details'))], _('FILE'))
 def debugbundle(ui, bundlepath, all=None, **opts):
     """lists the contents of a bundle"""
-    f = url.open(ui, bundlepath)
+    f = hg.openpath(ui, bundlepath)
     try:
         gen = changegroup.readbundle(f, bundlepath)
         if all:
             ui.write("format: id, p1, p2, cset, delta base, len(delta)\n")
 
             def showchunks(named):
                 ui.write("\n%s\n" % named)
                 chain = None
                 while True:
                     chunkdata = gen.deltachunk(chain)
                     if not chunkdata:
                         break
                     node = chunkdata['node']
                     p1 = chunkdata['p1']
                     p2 = chunkdata['p2']
                     cs = chunkdata['cs']
                     deltabase = chunkdata['deltabase']
                     delta = chunkdata['delta']
                     ui.write("%s %s %s %s %s %s\n" %
                              (hex(node), hex(p1), hex(p2),
                               hex(cs), hex(deltabase), len(delta)))
                     chain = node
 
             chunkdata = gen.changelogheader()
             showchunks("changelog")
             chunkdata = gen.manifestheader()
             showchunks("manifest")
             while True:
                 chunkdata = gen.filelogheader()
                 if not chunkdata:
                     break
                 fname = chunkdata['filename']
                 showchunks(fname)
         else:
             chunkdata = gen.changelogheader()
             chain = None
             while True:
                 chunkdata = gen.deltachunk(chain)
                 if not chunkdata:
                     break
                 node = chunkdata['node']
                 ui.write("%s\n" % hex(node))
                 chain = node
     finally:
         f.close()
 
 @command('debugcheckstate', [], '')
 def debugcheckstate(ui, repo):
     """validate the correctness of the current dirstate"""
     parent1, parent2 = repo.dirstate.parents()
     m1 = repo[parent1].manifest()
     m2 = repo[parent2].manifest()
     errors = 0
     for f in repo.dirstate:
         state = repo.dirstate[f]
         if state in "nr" and f not in m1:
             ui.warn(_("%s in state %s, but not in manifest1\n") % (f, state))
             errors += 1
         if state in "a" and f in m1:
             ui.warn(_("%s in state %s, but also in manifest1\n") % (f, state))
             errors += 1
         if state in "m" and f not in m1 and f not in m2:
             ui.warn(_("%s in state %s, but not in either manifest\n") %
                     (f, state))
             errors += 1
     for f in m1:
         state = repo.dirstate[f]
         if state not in "nrm":
             ui.warn(_("%s in manifest1, but listed as state %s") % (f, state))
             errors += 1
     if errors:
         error = _(".hg/dirstate inconsistent with current parent's manifest")
         raise util.Abort(error)
 
 @command('debugcommands', [], _('[COMMAND]'))
 def debugcommands(ui, cmd='', *args):
     """list all available commands and options"""
     for cmd, vals in sorted(table.iteritems()):
         cmd = cmd.split('|')[0].strip('^')
         opts = ', '.join([i[1] for i in vals[1]])
         ui.write('%s: %s\n' % (cmd, opts))
 
 @command('debugcomplete',
     [('o', 'options', None, _('show the command options'))],
     _('[-o] CMD'))
 def debugcomplete(ui, cmd='', **opts):
     """returns the completion list associated with the given command"""
 
     if opts.get('options'):
         options = []
         otables = [globalopts]
         if cmd:
             aliases, entry = cmdutil.findcmd(cmd, table, False)
             otables.append(entry[1])
         for t in otables:
             for o in t:
                 if "(DEPRECATED)" in o[3]:
                     continue
                 if o[0]:
                     options.append('-%s' % o[0])
                 options.append('--%s' % o[1])
         ui.write("%s\n" % "\n".join(options))
         return
 
     cmdlist = cmdutil.findpossible(cmd, table)
     if ui.verbose:
         cmdlist = [' '.join(c[0]) for c in cmdlist.values()]
     ui.write("%s\n" % "\n".join(sorted(cmdlist)))
 
 @command('debugdag',
     [('t', 'tags', None, _('use tags as labels')),
     ('b', 'branches', None, _('annotate with branch names')),
     ('', 'dots', None, _('use dots for runs')),
     ('s', 'spaces', None, _('separate elements by spaces'))],
     _('[OPTION]... [FILE [REV]...]'))
 def debugdag(ui, repo, file_=None, *revs, **opts):
     """format the changelog or an index DAG as a concise textual description
 
     If you pass a revlog index, the revlog's DAG is emitted. If you list
     revision numbers, they get labeled in the output as rN.
 
     Otherwise, the changelog DAG of the current repo is emitted.
     """
     spaces = opts.get('spaces')
     dots = opts.get('dots')
     if file_:
         rlog = revlog.revlog(scmutil.opener(os.getcwd(), audit=False), file_)
         revs = set((int(r) for r in revs))
         def events():
             for r in rlog:
                 yield 'n', (r, list(set(p for p in rlog.parentrevs(r)
                                         if p != -1)))
                 if r in revs:
                     yield 'l', (r, "r%i" % r)
     elif repo:
         cl = repo.changelog
         tags = opts.get('tags')
         branches = opts.get('branches')
         if tags:
             labels = {}
             for l, n in repo.tags().items():
                 labels.setdefault(cl.rev(n), []).append(l)
         def events():
             b = "default"
             for r in cl:
                 if branches:
                     newb = cl.read(cl.node(r))[5]['branch']
                     if newb != b:
                         yield 'a', newb
                         b = newb
                 yield 'n', (r, list(set(p for p in cl.parentrevs(r)
                                         if p != -1)))
                 if tags:
                     ls = labels.get(r)
                     if ls:
                         for l in ls:
                             yield 'l', (r, l)
     else:
         raise util.Abort(_('need repo for changelog dag'))
 
     for line in dagparser.dagtextlines(events(),
                                        addspaces=spaces,
                                        wraplabels=True,
                                        wrapannotations=True,
                                        wrapnonlinear=dots,
                                        usedots=dots,
                                        maxlinewidth=70):
         ui.write(line)
         ui.write("\n")
 
 @command('debugdata',
     [('c', 'changelog', False, _('open changelog')),
      ('m', 'manifest', False, _('open manifest'))],
     _('-c|-m|FILE REV'))
 def debugdata(ui, repo, file_, rev = None, **opts):
     """dump the contents of a data file revision"""
     if opts.get('changelog') or opts.get('manifest'):
         file_, rev = None, file_
     elif rev is None:
         raise error.CommandError('debugdata', _('invalid arguments'))
     r = cmdutil.openrevlog(repo, 'debugdata', file_, opts)
     try:
         ui.write(r.revision(r.lookup(rev)))
     except KeyError:
         raise util.Abort(_('invalid revision identifier %s') % rev)
 
 @command('debugdate',
     [('e', 'extended', None, _('try extended date formats'))],
     _('[-e] DATE [RANGE]'))
 def debugdate(ui, date, range=None, **opts):
     """parse and display a date"""
     if opts["extended"]:
         d = util.parsedate(date, util.extendeddateformats)
     else:
         d = util.parsedate(date)
     ui.write("internal: %s %s\n" % d)
     ui.write("standard: %s\n" % util.datestr(d))
     if range:
         m = util.matchdate(range)
         ui.write("match: %s\n" % m(d[0]))
 
 @command('debugdiscovery',
     [('', 'old', None, _('use old-style discovery')),
     ('', 'nonheads', None,
      _('use old-style discovery with non-heads included')),
     ] + remoteopts,
     _('[-l REV] [-r REV] [-b BRANCH]... [OTHER]'))
 def debugdiscovery(ui, repo, remoteurl="default", **opts):
     """runs the changeset discovery protocol in isolation"""
     remoteurl, branches = hg.parseurl(ui.expandpath(remoteurl),
                                       opts.get('branch'))
     remote = hg.peer(repo, opts, remoteurl)
     ui.status(_('comparing with %s\n') % util.hidepassword(remoteurl))
 
     # make sure tests are repeatable
     random.seed(12323)
 
     def doit(localheads, remoteheads, remote=remote):
         if opts.get('old'):
             if localheads:
                 raise util.Abort('cannot use localheads with old style '
                                  'discovery')
             if not util.safehasattr(remote, 'branches'):
                 # enable in-client legacy support
                 remote = localrepo.locallegacypeer(remote.local())
             common, _in, hds = treediscovery.findcommonincoming(repo, remote,
                                                                 force=True)
             common = set(common)
             if not opts.get('nonheads'):
                 ui.write("unpruned common: %s\n" % " ".join([short(n)
                                                             for n in common]))
                 dag = dagutil.revlogdag(repo.changelog)
                 all = dag.ancestorset(dag.internalizeall(common))
                 common = dag.externalizeall(dag.headsetofconnecteds(all))
         else:
             common, any, hds = setdiscovery.findcommonheads(ui, repo, remote)
         common = set(common)
         rheads = set(hds)
         lheads = set(repo.heads())
         ui.write("common heads: %s\n" % " ".join([short(n) for n in common]))
         if lheads <= common:
             ui.write("local is subset\n")
         elif rheads <= common:
             ui.write("remote is subset\n")
 
     serverlogs = opts.get('serverlog')
     if serverlogs:
         for filename in serverlogs:
             logfile = open(filename, 'r')
             try:
                 line = logfile.readline()
                 while line:
                     parts = line.strip().split(';')
                     op = parts[1]
                     if op == 'cg':
                         pass
                     elif op == 'cgss':
                         doit(parts[2].split(' '), parts[3].split(' '))
                     elif op == 'unb':
                         doit(parts[3].split(' '), parts[2].split(' '))
                     line = logfile.readline()
             finally:
                 logfile.close()
 
     else:
         remoterevs, _checkout = hg.addbranchrevs(repo, remote, branches,
                                                  opts.get('remote_head'))
         localrevs = opts.get('local_head')
         doit(localrevs, remoterevs)
 
 @command('debugfileset',
     [('r', 'rev', '', _('apply the filespec on this revision'), _('REV'))],
     _('[-r REV] FILESPEC'))
 def debugfileset(ui, repo, expr, **opts):
     '''parse and apply a fileset specification'''
     ctx = scmutil.revsingle(repo, opts.get('rev'), None)
     if ui.verbose:
         tree = fileset.parse(expr)[0]
         ui.note(tree, "\n")
 
     for f in fileset.getfileset(ctx, expr):
         ui.write("%s\n" % f)
 
 @command('debugfsinfo', [], _('[PATH]'))
 def debugfsinfo(ui, path = "."):
     """show information detected about current filesystem"""
     util.writefile('.debugfsinfo', '')
     ui.write('exec: %s\n' % (util.checkexec(path) and 'yes' or 'no'))
     ui.write('symlink: %s\n' % (util.checklink(path) and 'yes' or 'no'))
     ui.write('case-sensitive: %s\n' % (util.checkcase('.debugfsinfo')
                                 and 'yes' or 'no'))
     os.unlink('.debugfsinfo')
 
 @command('debuggetbundle',
     [('H', 'head', [], _('id of head node'), _('ID')),
     ('C', 'common', [], _('id of common node'), _('ID')),
     ('t', 'type', 'bzip2', _('bundle compression type to use'), _('TYPE'))],
     _('REPO FILE [-H|-C ID]...'))
 def debuggetbundle(ui, repopath, bundlepath, head=None, common=None, **opts):
     """retrieves a bundle from a repo
 
     Every ID must be a full-length hex node id string. Saves the bundle to the
     given file.
     """
     repo = hg.peer(ui, opts, repopath)
     if not repo.capable('getbundle'):
         raise util.Abort("getbundle() not supported by target repository")
     args = {}
     if common:
         args['common'] = [bin(s) for s in common]
     if head:
         args['heads'] = [bin(s) for s in head]
     bundle = repo.getbundle('debug', **args)
 
     bundletype = opts.get('type', 'bzip2').lower()
     btypes = {'none': 'HG10UN', 'bzip2': 'HG10BZ', 'gzip': 'HG10GZ'}
     bundletype = btypes.get(bundletype)
     if bundletype not in changegroup.bundletypes:
         raise util.Abort(_('unknown bundle type specified with --type'))
     changegroup.writebundle(bundle, bundlepath, bundletype)
 
 @command('debugignore', [], '')
 def debugignore(ui, repo, *values, **opts):
     """display the combined ignore pattern"""
     ignore = repo.dirstate._ignore
     includepat = getattr(ignore, 'includepat', None)
     if includepat is not None:
         ui.write("%s\n" % includepat)
     else:
         raise util.Abort(_("no ignore patterns found"))
 
 @command('debugindex',
     [('c', 'changelog', False, _('open changelog')),
      ('m', 'manifest', False, _('open manifest')),
      ('f', 'format', 0, _('revlog format'), _('FORMAT'))],
     _('[-f FORMAT] -c|-m|FILE'))
 def debugindex(ui, repo, file_ = None, **opts):
     """dump the contents of an index file"""
     r = cmdutil.openrevlog(repo, 'debugindex', file_, opts)
     format = opts.get('format', 0)
     if format not in (0, 1):
         raise util.Abort(_("unknown format %d") % format)
 
     generaldelta = r.version & revlog.REVLOGGENERALDELTA
     if generaldelta:
         basehdr = ' delta'
     else:
         basehdr = '  base'
 
     if format == 0:
         ui.write("   rev    offset  length " + basehdr + " linkrev"
                  " nodeid       p1           p2\n")
     elif format == 1:
         ui.write("   rev flag   offset   length"
                  "     size " + basehdr + "   link     p1     p2"
                  "       nodeid\n")
 
     for i in r:
         node = r.node(i)
         if generaldelta:
             base = r.deltaparent(i)
         else:
             base = r.chainbase(i)
         if format == 0:
             try:
                 pp = r.parents(node)
             except Exception:
                 pp = [nullid, nullid]
             ui.write("% 6d % 9d % 7d % 6d % 7d %s %s %s\n" % (
                     i, r.start(i), r.length(i), base, r.linkrev(i),
                     short(node), short(pp[0]), short(pp[1])))
         elif format == 1:
             pr = r.parentrevs(i)
             ui.write("% 6d %04x % 8d % 8d % 8d % 6d % 6d % 6d % 6d %s\n" % (
                     i, r.flags(i), r.start(i), r.length(i), r.rawsize(i),
                     base, r.linkrev(i), pr[0], pr[1], short(node)))
 
 @command('debugindexdot', [], _('FILE'))
 def debugindexdot(ui, repo, file_):
     """dump an index DAG as a graphviz dot file"""
     r = None
     if repo:
         filelog = repo.file(file_)
         if len(filelog):
             r = filelog
     if not r:
         r = revlog.revlog(scmutil.opener(os.getcwd(), audit=False), file_)
     ui.write("digraph G {\n")
     for i in r:
         node = r.node(i)
         pp = r.parents(node)
         ui.write("\t%d -> %d\n" % (r.rev(pp[0]), i))
         if pp[1] != nullid:
             ui.write("\t%d -> %d\n" % (r.rev(pp[1]), i))
     ui.write("}\n")
 
 @command('debuginstall', [], '')
 def debuginstall(ui):
     '''test Mercurial installation
 
     Returns 0 on success.
     '''
 
     def writetemp(contents):
         (fd, name) = tempfile.mkstemp(prefix="hg-debuginstall-")
         f = os.fdopen(fd, "wb")
         f.write(contents)
         f.close()
         return name
 
     problems = 0
 
     # encoding
     ui.status(_("checking encoding (%s)...\n") % encoding.encoding)
     try:
         encoding.fromlocal("test")
     except util.Abort, inst:
         ui.write(" %s\n" % inst)
         ui.write(_(" (check that your locale is properly set)\n"))
         problems += 1
 
     # Python lib
     ui.status(_("checking Python lib (%s)...\n")
               % os.path.dirname(os.__file__))
 
     # compiled modules
     ui.status(_("checking installed modules (%s)...\n")
               % os.path.dirname(__file__))
     try:
         import bdiff, mpatch, base85, osutil
         dir(bdiff), dir(mpatch), dir(base85), dir(osutil) # quiet pyflakes
     except Exception, inst:
         ui.write(" %s\n" % inst)
         ui.write(_(" One or more extensions could not be found"))
         ui.write(_(" (check that you compiled the extensions)\n"))
         problems += 1
 
     # templates
     import templater
     p = templater.templatepath()
     ui.status(_("checking templates (%s)...\n") % ' '.join(p))
     try:
         templater.templater(templater.templatepath("map-cmdline.default"))
     except Exception, inst:
         ui.write(" %s\n" % inst)
         ui.write(_(" (templates seem to have been installed incorrectly)\n"))
         problems += 1
 
     # editor
     ui.status(_("checking commit editor...\n"))
     editor = ui.geteditor()
     cmdpath = util.findexe(editor) or util.findexe(editor.split()[0])
     if not cmdpath:
         if editor == 'vi':
             ui.write(_(" No commit editor set and can't find vi in PATH\n"))
             ui.write(_(" (specify a commit editor in your configuration"
                        " file)\n"))
         else:
             ui.write(_(" Can't find editor '%s' in PATH\n") % editor)
             ui.write(_(" (specify a commit editor in your configuration"
                        " file)\n"))
             problems += 1
 
     # check username
     ui.status(_("checking username...\n"))
     try:
         ui.username()
     except util.Abort, e:
         ui.write(" %s\n" % e)
         ui.write(_(" (specify a username in your configuration file)\n"))
         problems += 1
 
     if not problems:
         ui.status(_("no problems detected\n"))
     else:
         ui.write(_("%s problems detected,"
                    " please check your install!\n") % problems)
 
     return problems
 
 @command('debugknown', [], _('REPO ID...'))
 def debugknown(ui, repopath, *ids, **opts):
     """test whether node ids are known to a repo
 
     Every ID must be a full-length hex node id string. Returns a list of 0s
     and 1s indicating unknown/known.
     """
     repo = hg.peer(ui, opts, repopath)
     if not repo.capable('known'):
         raise util.Abort("known() not supported by target repository")
     flags = repo.known([bin(s) for s in ids])
     ui.write("%s\n" % ("".join([f and "1" or "0" for f in flags])))
 
 @command('debugobsolete',
         [('', 'flags', 0, _('markers flag')),
         ] + commitopts2,
          _('[OBSOLETED [REPLACEMENT] [REPL... ]'))
 def debugobsolete(ui, repo, precursor=None, *successors, **opts):
     """create arbitrary obsolete marker"""
     def parsenodeid(s):
         try:
             # We do not use revsingle/revrange functions here to accept
             # arbitrary node identifiers, possibly not present in the
             # local repository.
             n = bin(s)
             if len(n) != len(nullid):
                 raise TypeError()
             return n
         except TypeError:
             raise util.Abort('changeset references must be full hexadecimal '
                              'node identifiers')
 
     if precursor is not None:
         metadata = {}
         if 'date' in opts:
             metadata['date'] = opts['date']
         metadata['user'] = opts['user'] or ui.username()
         succs = tuple(parsenodeid(succ) for succ in successors)
         l = repo.lock()
         try:
             tr = repo.transaction('debugobsolete')
             try:
                 repo.obsstore.create(tr, parsenodeid(precursor), succs,
                                      opts['flags'], metadata)
                 tr.close()
             finally:
                 tr.release()
         finally:
             l.release()
     else:
         for m in obsolete.allmarkers(repo):
             ui.write(hex(m.precnode()))
             for repl in m.succnodes():
                 ui.write(' ')
                 ui.write(hex(repl))
             ui.write(' %X ' % m._data[2])
             ui.write(m.metadata())
             ui.write('\n')
 
 @command('debugpushkey', [], _('REPO NAMESPACE [KEY OLD NEW]'))
 def debugpushkey(ui, repopath, namespace, *keyinfo, **opts):
     '''access the pushkey key/value protocol
 
     With two args, list the keys in the given namespace.
 
     With five args, set a key to new if it currently is set to old.
     Reports success or failure.
     '''
 
     target = hg.peer(ui, {}, repopath)
     if keyinfo:
         key, old, new = keyinfo
         r = target.pushkey(namespace, key, old, new)
         ui.status(str(r) + '\n')
         return not r
     else:
         for k, v in target.listkeys(namespace).iteritems():
             ui.write("%s\t%s\n" % (k.encode('string-escape'),
                                    v.encode('string-escape')))
 
 @command('debugpvec', [], _('A B'))
 def debugpvec(ui, repo, a, b=None):
     ca = scmutil.revsingle(repo, a)
     cb = scmutil.revsingle(repo, b)
     pa = pvec.ctxpvec(ca)
     pb = pvec.ctxpvec(cb)
     if pa == pb:
         rel = "="
     elif pa > pb:
         rel = ">"
     elif pa < pb:
         rel = "<"
     elif pa | pb:
         rel = "|"
     ui.write(_("a: %s\n") % pa)
     ui.write(_("b: %s\n") % pb)
     ui.write(_("depth(a): %d depth(b): %d\n") % (pa._depth, pb._depth))
     ui.write(_("delta: %d hdist: %d distance: %d relation: %s\n") %
              (abs(pa._depth - pb._depth), pvec._hamming(pa._vec, pb._vec),
               pa.distance(pb), rel))
 
 @command('debugrebuildstate',
     [('r', 'rev', '', _('revision to rebuild to'), _('REV'))],
     _('[-r REV] [REV]'))
 def debugrebuildstate(ui, repo, rev="tip"):
     """rebuild the dirstate as it would look like for the given revision"""
     ctx = scmutil.revsingle(repo, rev)
     wlock = repo.wlock()
     try:
         repo.dirstate.rebuild(ctx.node(), ctx.manifest())
     finally:
         wlock.release()
 
 @command('debugrename',
     [('r', 'rev', '', _('revision to debug'), _('REV'))],
     _('[-r REV] FILE'))
 def debugrename(ui, repo, file1, *pats, **opts):
     """dump rename information"""
 
     ctx = scmutil.revsingle(repo, opts.get('rev'))
     m = scmutil.match(ctx, (file1,) + pats, opts)
     for abs in ctx.walk(m):
         fctx = ctx[abs]
         o = fctx.filelog().renamed(fctx.filenode())
         rel = m.rel(abs)
         if o:
             ui.write(_("%s renamed from %s:%s\n") % (rel, o[0], hex(o[1])))
         else:
             ui.write(_("%s not renamed\n") % rel)
 
 @command('debugrevlog',
     [('c', 'changelog', False, _('open changelog')),
      ('m', 'manifest', False, _('open manifest')),
      ('d', 'dump', False, _('dump index data'))],
      _('-c|-m|FILE'))
 def debugrevlog(ui, repo, file_ = None, **opts):
     """show data and statistics about a revlog"""
     r = cmdutil.openrevlog(repo, 'debugrevlog', file_, opts)
 
     if opts.get("dump"):
         numrevs = len(r)
         ui.write("# rev p1rev p2rev start end deltastart base p1 p2"
                  " rawsize totalsize compression heads\n")
         ts = 0
         heads = set()
         for rev in xrange(numrevs):
             dbase = r.deltaparent(rev)
             if dbase == -1:
                 dbase = rev
             cbase = r.chainbase(rev)
             p1, p2 = r.parentrevs(rev)
             rs = r.rawsize(rev)
             ts = ts + rs
             heads -= set(r.parentrevs(rev))
             heads.add(rev)
             ui.write("%d %d %d %d %d %d %d %d %d %d %d %d %d\n" %
                      (rev, p1, p2, r.start(rev), r.end(rev),
                       r.start(dbase), r.start(cbase),
                       r.start(p1), r.start(p2),
                       rs, ts, ts / r.end(rev), len(heads)))
         return 0
 
     v = r.version
     format = v & 0xFFFF
     flags = []
     gdelta = False
     if v & revlog.REVLOGNGINLINEDATA:
         flags.append('inline')
     if v & revlog.REVLOGGENERALDELTA:
         gdelta = True
         flags.append('generaldelta')
     if not flags:
         flags = ['(none)']
 
     nummerges = 0
     numfull = 0
     numprev = 0
     nump1 = 0
     nump2 = 0
     numother = 0
     nump1prev = 0
     nump2prev = 0
     chainlengths = []
 
     datasize = [None, 0, 0L]
     fullsize = [None, 0, 0L]
     deltasize = [None, 0, 0L]
 
     def addsize(size, l):
         if l[0] is None or size < l[0]:
             l[0] = size
         if size > l[1]:
             l[1] = size
         l[2] += size
 
     numrevs = len(r)
     for rev in xrange(numrevs):
         p1, p2 = r.parentrevs(rev)
         delta = r.deltaparent(rev)
         if format > 0:
             addsize(r.rawsize(rev), datasize)
         if p2 != nullrev:
             nummerges += 1
         size = r.length(rev)
         if delta == nullrev:
             chainlengths.append(0)
             numfull += 1
             addsize(size, fullsize)
         else:
             chainlengths.append(chainlengths[delta] + 1)
             addsize(size, deltasize)
             if delta == rev - 1:
                 numprev += 1
                 if delta == p1:
                     nump1prev += 1
                 elif delta == p2:
                     nump2prev += 1
             elif delta == p1:
                 nump1 += 1
             elif delta == p2:
                 nump2 += 1
             elif delta != nullrev:
                 numother += 1
 
     # Adjust size min value for empty cases
     for size in (datasize, fullsize, deltasize):
         if size[0] is None:
             size[0] = 0
 
     numdeltas = numrevs - numfull
     numoprev = numprev - nump1prev - nump2prev
     totalrawsize = datasize[2]
     datasize[2] /= numrevs
     fulltotal = fullsize[2]
     fullsize[2] /= numfull
     deltatotal = deltasize[2]
     if numrevs - numfull > 0:
         deltasize[2] /= numrevs - numfull
     totalsize = fulltotal + deltatotal
     avgchainlen = sum(chainlengths) / numrevs
     compratio = totalrawsize / totalsize
 
     basedfmtstr = '%%%dd\n'
     basepcfmtstr = '%%%dd %s(%%5.2f%%%%)\n'
 
     def dfmtstr(max):
         return basedfmtstr % len(str(max))
     def pcfmtstr(max, padding=0):
         return basepcfmtstr % (len(str(max)), ' ' * padding)
 
     def pcfmt(value, total):
         return (value, 100 * float(value) / total)
 
     ui.write('format : %d\n' % format)
     ui.write('flags  : %s\n' % ', '.join(flags))
 
     ui.write('\n')
     fmt = pcfmtstr(totalsize)
     fmt2 = dfmtstr(totalsize)
     ui.write('revisions     : ' + fmt2 % numrevs)
     ui.write('    merges    : ' + fmt % pcfmt(nummerges, numrevs))
     ui.write('    normal    : ' + fmt % pcfmt(numrevs - nummerges, numrevs))
     ui.write('revisions     : ' + fmt2 % numrevs)
     ui.write('    full      : ' + fmt % pcfmt(numfull, numrevs))
     ui.write('    deltas    : ' + fmt % pcfmt(numdeltas, numrevs))
     ui.write('revision size : ' + fmt2 % totalsize)
     ui.write('    full      : ' + fmt % pcfmt(fulltotal, totalsize))
     ui.write('    deltas    : ' + fmt % pcfmt(deltatotal, totalsize))
 
     ui.write('\n')
     fmt = dfmtstr(max(avgchainlen, compratio))
     ui.write('avg chain length  : ' + fmt % avgchainlen)
     ui.write('compression ratio : ' + fmt % compratio)
 
     if format > 0:
         ui.write('\n')
         ui.write('uncompressed data size (min/max/avg) : %d / %d / %d\n'
                  % tuple(datasize))
     ui.write('full revision size (min/max/avg)     : %d / %d / %d\n'
              % tuple(fullsize))
     ui.write('delta size (min/max/avg)             : %d / %d / %d\n'
              % tuple(deltasize))
 
     if numdeltas > 0:
         ui.write('\n')
         fmt = pcfmtstr(numdeltas)
         fmt2 = pcfmtstr(numdeltas, 4)
         ui.write('deltas against prev  : ' + fmt % pcfmt(numprev, numdeltas))
         if numprev > 0:
             ui.write('    where prev = p1  : ' + fmt2 % pcfmt(nump1prev,
                                                               numprev))
             ui.write('    where prev = p2  : ' + fmt2 % pcfmt(nump2prev,
                                                               numprev))
             ui.write('    other            : ' + fmt2 % pcfmt(numoprev,
                                                               numprev))
         if gdelta:
             ui.write('deltas against p1    : ' + fmt % pcfmt(nump1, numdeltas))
             ui.write('deltas against p2    : ' + fmt % pcfmt(nump2, numdeltas))
             ui.write('deltas against other : ' + fmt % pcfmt(numother,
                                                              numdeltas))
 
 @command('debugrevspec', [], ('REVSPEC'))
 def debugrevspec(ui, repo, expr):
     """parse and apply a revision specification
 
     Use --verbose to print the parsed tree before and after aliases
     expansion.
     """
     if ui.verbose:
         tree = revset.parse(expr)[0]
         ui.note(revset.prettyformat(tree), "\n")
         newtree = revset.findaliases(ui, tree)
         if newtree != tree:
             ui.note(revset.prettyformat(newtree), "\n")
     func = revset.match(ui, expr)
     for c in func(repo, range(len(repo))):
         ui.write("%s\n" % c)
 
 @command('debugsetparents', [], _('REV1 [REV2]'))
 def debugsetparents(ui, repo, rev1, rev2=None):
     """manually set the parents of the current working directory
 
     This is useful for writing repository conversion tools, but should
     be used with care.
 
     Returns 0 on success.
     """
 
     r1 = scmutil.revsingle(repo, rev1).node()
     r2 = scmutil.revsingle(repo, rev2, 'null').node()
 
     wlock = repo.wlock()
     try:
         repo.setparents(r1, r2)
     finally:
         wlock.release()
 
 @command('debugstate',
     [('', 'nodates', None, _('do not display the saved mtime')),
     ('', 'datesort', None, _('sort by saved mtime'))],
     _('[OPTION]...'))
 def debugstate(ui, repo, nodates=None, datesort=None):
     """show the contents of the current dirstate"""
     timestr = ""
     showdate = not nodates
     if datesort:
         keyfunc = lambda x: (x[1][3], x[0]) # sort by mtime, then by filename
     else:
         keyfunc = None # sort by filename
     for file_, ent in sorted(repo.dirstate._map.iteritems(), key=keyfunc):
         if showdate:
             if ent[3] == -1:
                 # Pad or slice to locale representation
                 locale_len = len(time.strftime("%Y-%m-%d %H:%M:%S ",
                                                time.localtime(0)))
                 timestr = 'unset'
                 timestr = (timestr[:locale_len] +
                            ' ' * (locale_len - len(timestr)))
             else:
                 timestr = time.strftime("%Y-%m-%d %H:%M:%S ",
                                         time.localtime(ent[3]))
         if ent[1] & 020000:
             mode = 'lnk'
         else:
             mode = '%3o' % (ent[1] & 0777 & ~util.umask)
         ui.write("%c %s %10d %s%s\n" % (ent[0], mode, ent[2], timestr, file_))
     for f in repo.dirstate.copies():
         ui.write(_("copy: %s -> %s\n") % (repo.dirstate.copied(f), f))
 
 @command('debugsub',
     [('r', 'rev', '',
      _('revision to check'), _('REV'))],
     _('[-r REV] [REV]'))
 def debugsub(ui, repo, rev=None):
     ctx = scmutil.revsingle(repo, rev, None)
     for k, v in sorted(ctx.substate.items()):
         ui.write('path %s\n' % k)
         ui.write(' source   %s\n' % v[0])
         ui.write(' revision %s\n' % v[1])
 
 @command('debugwalk', walkopts, _('[OPTION]... [FILE]...'))
 def debugwalk(ui, repo, *pats, **opts):
     """show how files match on given patterns"""
     m = scmutil.match(repo[None], pats, opts)
     items = list(repo.walk(m))
     if not items:
         return
     f = lambda fn: fn
     if ui.configbool('ui', 'slash') and os.sep != '/':
         f = lambda fn: util.normpath(fn)
     fmt = 'f  %%-%ds  %%-%ds  %%s' % (
         max([len(abs) for abs in items]),
         max([len(m.rel(abs)) for abs in items]))
     for abs in items:
         line = fmt % (abs, f(m.rel(abs)), m.exact(abs) and 'exact' or '')
         ui.write("%s\n" % line.rstrip())
 
 @command('debugwireargs',
     [('', 'three', '', 'three'),
     ('', 'four', '', 'four'),
     ('', 'five', '', 'five'),
     ] + remoteopts,
     _('REPO [OPTIONS]... [ONE [TWO]]'))
 def debugwireargs(ui, repopath, *vals, **opts):
     repo = hg.peer(ui, opts, repopath)
     for opt in remoteopts:
         del opts[opt[1]]
     args = {}
     for k, v in opts.iteritems():
         if v:
             args[k] = v
     # run twice to check that we don't mess up the stream for the next command
     res1 = repo.debugwireargs(*vals, **args)
     res2 = repo.debugwireargs(*vals, **args)
     ui.write("%s\n" % res1)
     if res1 != res2:
         ui.warn("%s\n" % res2)
 
 @command('^diff',
     [('r', 'rev', [], _('revision'), _('REV')),
     ('c', 'change', '', _('change made by revision'), _('REV'))
     ] + diffopts + diffopts2 + walkopts + subrepoopts,
     _('[OPTION]... ([-c REV] | [-r REV1 [-r REV2]]) [FILE]...'))
 def diff(ui, repo, *pats, **opts):
     """diff repository (or selected files)
 
     Show differences between revisions for the specified files.
 
     Differences between files are shown using the unified diff format.
 
     .. note::
        diff may generate unexpected results for merges, as it will
        default to comparing against the working directory's first
        parent changeset if no revisions are specified.
 
     When two revision arguments are given, then changes are shown
     between those revisions. If only one revision is specified then
     that revision is compared to the working directory, and, when no
     revisions are specified, the working directory files are compared
     to its parent.
 
     Alternatively you can specify -c/--change with a revision to see
     the changes in that changeset relative to its first parent.
 
     Without the -a/--text option, diff will avoid generating diffs of
     files it detects as binary. With -a, diff will generate a diff
     anyway, probably with undesirable results.
 
     Use the -g/--git option to generate diffs in the git extended diff
     format. For more information, read :hg:`help diffs`.
 
     .. container:: verbose
 
       Examples:
 
       - compare a file in the current working directory to its parent::
 
           hg diff foo.c
 
       - compare two historical versions of a directory, with rename info::
 
           hg diff --git -r 1.0:1.2 lib/
 
       - get change stats relative to the last change on some date::
 
           hg diff --stat -r "date('may 2')"
 
       - diff all newly-added files that contain a keyword::
 
           hg diff "set:added() and grep(GNU)"
 
       - compare a revision and its parents::
 
           hg diff -c 9353         # compare against first parent
           hg diff -r 9353^:9353   # same using revset syntax
           hg diff -r 9353^2:9353  # compare against the second parent
 
     Returns 0 on success.
     """
 
     revs = opts.get('rev')
     change = opts.get('change')
     stat = opts.get('stat')
     reverse = opts.get('reverse')
 
     if revs and change:
         msg = _('cannot specify --rev and --change at the same time')
         raise util.Abort(msg)
     elif change:
         node2 = scmutil.revsingle(repo, change, None).node()
         node1 = repo[node2].p1().node()
     else:
         node1, node2 = scmutil.revpair(repo, revs)
 
     if reverse:
         node1, node2 = node2, node1
 
     diffopts = patch.diffopts(ui, opts)
     m = scmutil.match(repo[node2], pats, opts)
     cmdutil.diffordiffstat(ui, repo, diffopts, node1, node2, m, stat=stat,
                            listsubrepos=opts.get('subrepos'))
 
 @command('^export',
     [('o', 'output', '',
      _('print output to file with formatted name'), _('FORMAT')),
     ('', 'switch-parent', None, _('diff against the second parent')),
     ('r', 'rev', [], _('revisions to export'), _('REV')),
     ] + diffopts,
     _('[OPTION]... [-o OUTFILESPEC] [-r] REV...'))
 def export(ui, repo, *changesets, **opts):
     """dump the header and diffs for one or more changesets
 
     Print the changeset header and diffs for one or more revisions.
 
     The information shown in the changeset header is: author, date,
     branch name (if non-default), changeset hash, parent(s) and commit
     comment.
 
     .. note::
        export may generate unexpected diff output for merge
        changesets, as it will compare the merge changeset against its
        first parent only.
 
     Output may be to a file, in which case the name of the file is
     given using a format string. The formatting rules are as follows:
 
     :``%%``: literal "%" character
     :``%H``: changeset hash (40 hexadecimal digits)
     :``%N``: number of patches being generated
     :``%R``: changeset revision number
     :``%b``: basename of the exporting repository
     :``%h``: short-form changeset hash (12 hexadecimal digits)
     :``%m``: first line of the commit message (only alphanumeric characters)
     :``%n``: zero-padded sequence number, starting at 1
     :``%r``: zero-padded changeset revision number
 
     Without the -a/--text option, export will avoid generating diffs
     of files it detects as binary. With -a, export will generate a
     diff anyway, probably with undesirable results.
 
     Use the -g/--git option to generate diffs in the git extended diff
     format. See :hg:`help diffs` for more information.
 
     With the --switch-parent option, the diff will be against the
     second parent. It can be useful to review a merge.
 
     .. container:: verbose
 
       Examples:
 
       - use export and import to transplant a bugfix to the current
         branch::
 
           hg export -r 9353 | hg import -
 
       - export all the changesets between two revisions to a file with
         rename information::
 
           hg export --git -r 123:150 > changes.txt
 
       - split outgoing changes into a series of patches with
         descriptive names::
 
           hg export -r "outgoing()" -o "%n-%m.patch"
 
     Returns 0 on success.
     """
     changesets += tuple(opts.get('rev', []))
     revs = scmutil.revrange(repo, changesets)
     if not revs:
         raise util.Abort(_("export requires at least one changeset"))
     if len(revs) > 1:
         ui.note(_('exporting patches:\n'))
     else:
         ui.note(_('exporting patch:\n'))
     cmdutil.export(repo, revs, template=opts.get('output'),
                  switch_parent=opts.get('switch_parent'),
                  opts=patch.diffopts(ui, opts))
 
 @command('^forget', walkopts, _('[OPTION]... FILE...'))
 def forget(ui, repo, *pats, **opts):
     """forget the specified files on the next commit
 
     Mark the specified files so they will no longer be tracked
     after the next commit.
 
     This only removes files from the current branch, not from the
     entire project history, and it does not delete them from the
     working directory.
 
     To undo a forget before the next commit, see :hg:`add`.
 
     .. container:: verbose
 
       Examples:
 
       - forget newly-added binary files::
 
           hg forget "set:added() and binary()"
 
       - forget files that would be excluded by .hgignore::
 
           hg forget "set:hgignore()"
 
     Returns 0 on success.
     """
 
     if not pats:
         raise util.Abort(_('no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     rejected = cmdutil.forget(ui, repo, m, prefix="", explicitonly=False)[0]
     return rejected and 1 or 0
 
 @command(
     'graft',
     [('r', 'rev', [], _('revisions to graft'), _('REV')),
      ('c', 'continue', False, _('resume interrupted graft')),
      ('e', 'edit', False, _('invoke editor on commit messages')),
      ('', 'log', None, _('append graft info to log message')),
      ('D', 'currentdate', False,
       _('record the current date as commit date')),
      ('U', 'currentuser', False,
       _('record the current user as committer'), _('DATE'))]
     + commitopts2 + mergetoolopts  + dryrunopts,
     _('[OPTION]... [-r] REV...'))
 def graft(ui, repo, *revs, **opts):
     '''copy changes from other branches onto the current branch
 
     This command uses Mercurial's merge logic to copy individual
     changes from other branches without merging branches in the
     history graph. This is sometimes known as 'backporting' or
     'cherry-picking'. By default, graft will copy user, date, and
     description from the source changesets.
 
     Changesets that are ancestors of the current revision, that have
     already been grafted, or that are merges will be skipped.
 
     If --log is specified, log messages will have a comment appended
     of the form::
 
       (grafted from CHANGESETHASH)
 
     If a graft merge results in conflicts, the graft process is
     interrupted so that the current merge can be manually resolved.
     Once all conflicts are addressed, the graft process can be
     continued with the -c/--continue option.
 
     .. note::
       The -c/--continue option does not reapply earlier options.
 
     .. container:: verbose
 
       Examples:
 
       - copy a single change to the stable branch and edit its description::
 
           hg update stable
           hg graft --edit 9393
 
       - graft a range of changesets with one exception, updating dates::
 
           hg graft -D "2085::2093 and not 2091"
 
       - continue a graft after resolving conflicts::
 
           hg graft -c
 
       - show the source of a grafted changeset::
 
           hg log --debug -r tip
 
     Returns 0 on successful completion.
     '''
 
     revs = list(revs)
     revs.extend(opts['rev'])
 
     if not opts.get('user') and opts.get('currentuser'):
         opts['user'] = ui.username()
     if not opts.get('date') and opts.get('currentdate'):
         opts['date'] = "%d %d" % util.makedate()
 
     editor = None
     if opts.get('edit'):
         editor = cmdutil.commitforceeditor
 
     cont = False
     if opts['continue']:
         cont = True
         if revs:
             raise util.Abort(_("can't specify --continue and revisions"))
         # read in unfinished revisions
         try:
             nodes = repo.opener.read('graftstate').splitlines()
             revs = [repo[node].rev() for node in nodes]
         except IOError, inst:
             if inst.errno != errno.ENOENT:
                 raise
             raise util.Abort(_("no graft state found, can't continue"))
     else:
         cmdutil.bailifchanged(repo)
         if not revs:
             raise util.Abort(_('no revisions specified'))
         revs = scmutil.revrange(repo, revs)
 
     # check for merges
     for rev in repo.revs('%ld and merge()', revs):
         ui.warn(_('skipping ungraftable merge revision %s\n') % rev)
         revs.remove(rev)
     if not revs:
         return -1
 
     # check for ancestors of dest branch
     for rev in repo.revs('::. and %ld', revs):
         ui.warn(_('skipping ancestor revision %s\n') % rev)
         revs.remove(rev)
     if not revs:
         return -1
 
     # analyze revs for earlier grafts
     ids = {}
     for ctx in repo.set("%ld", revs):
         ids[ctx.hex()] = ctx.rev()
         n = ctx.extra().get('source')
         if n:
             ids[n] = ctx.rev()
 
     # check ancestors for earlier grafts
     ui.debug('scanning for duplicate grafts\n')
     for ctx in repo.set("::. - ::%ld", revs):
         n = ctx.extra().get('source')
         if n in ids:
             r = repo[n].rev()
             if r in revs:
                 ui.warn(_('skipping already grafted revision %s\n') % r)
                 revs.remove(r)
             elif ids[n] in revs:
                 ui.warn(_('skipping already grafted revision %s '
                             '(same origin %d)\n') % (ids[n], r))
                 revs.remove(ids[n])
         elif ctx.hex() in ids:
             r = ids[ctx.hex()]
             ui.warn(_('skipping already grafted revision %s '
                             '(was grafted from %d)\n') % (r, ctx.rev()))
             revs.remove(r)
     if not revs:
         return -1
 
     wlock = repo.wlock()
     try:
         for pos, ctx in enumerate(repo.set("%ld", revs)):
             current = repo['.']
 
             ui.status(_('grafting revision %s\n') % ctx.rev())
             if opts.get('dry_run'):
                 continue
 
             # we don't merge the first commit when continuing
             if not cont:
                 # perform the graft merge with p1(rev) as 'ancestor'
                 try:
                     # ui.forcemerge is an internal variable, do not document
                     repo.ui.setconfig('ui', 'forcemerge', opts.get('tool', ''))
                     stats = mergemod.update(repo, ctx.node(), True, True, False,
                                             ctx.p1().node())
                 finally:
                     repo.ui.setconfig('ui', 'forcemerge', '')
                 # report any conflicts
                 if stats and stats[3] > 0:
                     # write out state for --continue
                     nodelines = [repo[rev].hex() + "\n" for rev in revs[pos:]]
                     repo.opener.write('graftstate', ''.join(nodelines))
                     raise util.Abort(
                         _("unresolved conflicts, can't continue"),
                         hint=_('use hg resolve and hg graft --continue'))
             else:
                 cont = False
 
             # drop the second merge parent
             repo.setparents(current.node(), nullid)
             repo.dirstate.write()
             # fix up dirstate for copies and renames
             cmdutil.duplicatecopies(repo, ctx.rev(), ctx.p1().rev())
 
             # commit
             source = ctx.extra().get('source')
             if not source:
                 source = ctx.hex()
             extra = {'source': source}
             user = ctx.user()
             if opts.get('user'):
                 user = opts['user']
             date = ctx.date()
             if opts.get('date'):
                 date = opts['date']
             message = ctx.description()
             if opts.get('log'):
                 message += '\n(grafted from %s)' % ctx.hex()
             node = repo.commit(text=message, user=user,
                         date=date, extra=extra, editor=editor)
             if node is None:
                 ui.status(_('graft for revision %s is empty\n') % ctx.rev())
     finally:
         wlock.release()
 
     # remove state when we complete successfully
     if not opts.get('dry_run') and os.path.exists(repo.join('graftstate')):
         util.unlinkpath(repo.join('graftstate'))
 
     return 0
 
 @command('grep',
     [('0', 'print0', None, _('end fields with NUL')),
     ('', 'all', None, _('print all revisions that match')),
     ('a', 'text', None, _('treat all files as text')),
     ('f', 'follow', None,
      _('follow changeset history,'
        ' or file history across copies and renames')),
     ('i', 'ignore-case', None, _('ignore case when matching')),
     ('l', 'files-with-matches', None,
      _('print only filenames and revisions that match')),
     ('n', 'line-number', None, _('print matching line numbers')),
     ('r', 'rev', [],
      _('only search files changed within revision range'), _('REV')),
     ('u', 'user', None, _('list the author (long with -v)')),
     ('d', 'date', None, _('list the date (short with -q)')),
     ] + walkopts,
     _('[OPTION]... PATTERN [FILE]...'))
 def grep(ui, repo, pattern, *pats, **opts):
     """search for a pattern in specified files and revisions
 
     Search revisions of files for a regular expression.
 
     This command behaves differently than Unix grep. It only accepts
     Python/Perl regexps. It searches repository history, not the
     working directory. It always prints the revision number in which a
     match appears.
 
     By default, grep only prints output for the first revision of a
     file in which it finds a match. To get it to print every revision
     that contains a change in match status ("-" for a match that
     becomes a non-match, or "+" for a non-match that becomes a match),
     use the --all flag.
 
     Returns 0 if a match is found, 1 otherwise.
     """
     reflags = re.M
     if opts.get('ignore_case'):
         reflags |= re.I
     try:
         regexp = re.compile(pattern, reflags)
     except re.error, inst:
         ui.warn(_("grep: invalid match pattern: %s\n") % inst)
         return 1
     sep, eol = ':', '\n'
     if opts.get('print0'):
         sep = eol = '\0'
 
     getfile = util.lrucachefunc(repo.file)
 
     def matchlines(body):
         begin = 0
         linenum = 0
         while True:
             match = regexp.search(body, begin)
             if not match:
                 break
             mstart, mend = match.span()
             linenum += body.count('\n', begin, mstart) + 1
             lstart = body.rfind('\n', begin, mstart) + 1 or begin
             begin = body.find('\n', mend) + 1 or len(body) + 1
             lend = begin - 1
             yield linenum, mstart - lstart, mend - lstart, body[lstart:lend]
 
     class linestate(object):
         def __init__(self, line, linenum, colstart, colend):
             self.line = line
             self.linenum = linenum
             self.colstart = colstart
             self.colend = colend
 
         def __hash__(self):
             return hash((self.linenum, self.line))
 
         def __eq__(self, other):
             return self.line == other.line
 
     matches = {}
     copies = {}
     def grepbody(fn, rev, body):
         matches[rev].setdefault(fn, [])
         m = matches[rev][fn]
         for lnum, cstart, cend, line in matchlines(body):
             s = linestate(line, lnum, cstart, cend)
             m.append(s)
 
     def difflinestates(a, b):
         sm = difflib.SequenceMatcher(None, a, b)
         for tag, alo, ahi, blo, bhi in sm.get_opcodes():
             if tag == 'insert':
                 for i in xrange(blo, bhi):
                     yield ('+', b[i])
             elif tag == 'delete':
                 for i in xrange(alo, ahi):
                     yield ('-', a[i])
             elif tag == 'replace':
                 for i in xrange(alo, ahi):
                     yield ('-', a[i])
                 for i in xrange(blo, bhi):
                     yield ('+', b[i])
 
     def display(fn, ctx, pstates, states):
         rev = ctx.rev()
         datefunc = ui.quiet and util.shortdate or util.datestr
         found = False
         filerevmatches = {}
         def binary():
             flog = getfile(fn)
             return util.binary(flog.read(ctx.filenode(fn)))
 
         if opts.get('all'):
             iter = difflinestates(pstates, states)
         else:
             iter = [('', l) for l in states]
         for change, l in iter:
             cols = [(fn, 'grep.filename'), (str(rev), 'grep.rev')]
             before, match, after = None, None, None
 
             if opts.get('line_number'):
                 cols.append((str(l.linenum), 'grep.linenumber'))
             if opts.get('all'):
                 cols.append((change, 'grep.change'))
             if opts.get('user'):
                 cols.append((ui.shortuser(ctx.user()), 'grep.user'))
             if opts.get('date'):
                 cols.append((datefunc(ctx.date()), 'grep.date'))
             if opts.get('files_with_matches'):
                 c = (fn, rev)
                 if c in filerevmatches:
                     continue
                 filerevmatches[c] = 1
             else:
                 before = l.line[:l.colstart]
                 match = l.line[l.colstart:l.colend]
                 after = l.line[l.colend:]
             for col, label in cols[:-1]:
                 ui.write(col, label=label)
                 ui.write(sep, label='grep.sep')
             ui.write(cols[-1][0], label=cols[-1][1])
             if before is not None:
                 ui.write(sep, label='grep.sep')
                 if not opts.get('text') and binary():
                     ui.write(" Binary file matches")
                 else:
                     ui.write(before)
                     ui.write(match, label='grep.match')
                     ui.write(after)
             ui.write(eol)
             found = True
         return found
 
     skip = {}
     revfiles = {}
     matchfn = scmutil.match(repo[None], pats, opts)
     found = False
     follow = opts.get('follow')
 
     def prep(ctx, fns):
         rev = ctx.rev()
         pctx = ctx.p1()
         parent = pctx.rev()
         matches.setdefault(rev, {})
         matches.setdefault(parent, {})
         files = revfiles.setdefault(rev, [])
         for fn in fns:
             flog = getfile(fn)
             try:
                 fnode = ctx.filenode(fn)
             except error.LookupError:
                 continue
 
             copied = flog.renamed(fnode)
             copy = follow and copied and copied[0]
             if copy:
                 copies.setdefault(rev, {})[fn] = copy
             if fn in skip:
                 if copy:
                     skip[copy] = True
                 continue
             files.append(fn)
 
             if fn not in matches[rev]:
                 grepbody(fn, rev, flog.read(fnode))
 
             pfn = copy or fn
             if pfn not in matches[parent]:
                 try:
                     fnode = pctx.filenode(pfn)
                     grepbody(pfn, parent, flog.read(fnode))
                 except error.LookupError:
                     pass
 
     for ctx in cmdutil.walkchangerevs(repo, matchfn, opts, prep):
         rev = ctx.rev()
         parent = ctx.p1().rev()
         for fn in sorted(revfiles.get(rev, [])):
             states = matches[rev][fn]
             copy = copies.get(rev, {}).get(fn)
             if fn in skip:
                 if copy:
                     skip[copy] = True
                 continue
             pstates = matches.get(parent, {}).get(copy or fn, [])
             if pstates or states:
                 r = display(fn, ctx, pstates, states)
                 found = found or r
                 if r and not opts.get('all'):
                     skip[fn] = True
                     if copy:
                         skip[copy] = True
         del matches[rev]
         del revfiles[rev]
 
     return not found
 
 @command('heads',
     [('r', 'rev', '',
      _('show only heads which are descendants of STARTREV'), _('STARTREV')),
     ('t', 'topo', False, _('show topological heads only')),
     ('a', 'active', False, _('show active branchheads only (DEPRECATED)')),
     ('c', 'closed', False, _('show normal and closed branch heads')),
     ] + templateopts,
     _('[-ct] [-r STARTREV] [REV]...'))
 def heads(ui, repo, *branchrevs, **opts):
     """show current repository heads or show branch heads
 
     With no arguments, show all repository branch heads.
 
     Repository "heads" are changesets with no child changesets. They are
     where development generally takes place and are the usual targets
     for update and merge operations. Branch heads are changesets that have
     no child changeset on the same branch.
 
     If one or more REVs are given, only branch heads on the branches
     associated with the specified changesets are shown. This means
     that you can use :hg:`heads foo` to see the heads on a branch
     named ``foo``.
 
     If -c/--closed is specified, also show branch heads marked closed
     (see :hg:`commit --close-branch`).
 
     If STARTREV is specified, only those heads that are descendants of
     STARTREV will be displayed.
 
     If -t/--topo is specified, named branch mechanics will be ignored and only
     changesets without children will be shown.
 
     Returns 0 if matching heads are found, 1 if not.
     """
 
     start = None
     if 'rev' in opts:
         start = scmutil.revsingle(repo, opts['rev'], None).node()
 
     if opts.get('topo'):
         heads = [repo[h] for h in repo.heads(start)]
     else:
         heads = []
         for branch in repo.branchmap():
             heads += repo.branchheads(branch, start, opts.get('closed'))
         heads = [repo[h] for h in heads]
 
     if branchrevs:
         branches = set(repo[br].branch() for br in branchrevs)
         heads = [h for h in heads if h.branch() in branches]
 
     if opts.get('active') and branchrevs:
         dagheads = repo.heads(start)
         heads = [h for h in heads if h.node() in dagheads]
 
     if branchrevs:
         haveheads = set(h.branch() for h in heads)
         if branches - haveheads:
             headless = ', '.join(b for b in branches - haveheads)
             msg = _('no open branch heads found on branches %s')
             if opts.get('rev'):
                 msg += _(' (started at %s)') % opts['rev']
             ui.warn((msg + '\n') % headless)
 
     if not heads:
         return 1
 
     heads = sorted(heads, key=lambda x: -x.rev())
     displayer = cmdutil.show_changeset(ui, repo, opts)
     for ctx in heads:
         displayer.show(ctx)
     displayer.close()
 
 @command('help',
     [('e', 'extension', None, _('show only help for extensions')),
      ('c', 'command', None, _('show only help for commands')),
      ('k', 'keyword', '', _('show topics matching keyword')),
      ],
     _('[-ec] [TOPIC]'))
 def help_(ui, name=None, unknowncmd=False, full=True, **opts):
     """show help for a given topic or a help overview
 
     With no arguments, print a list of commands with short help messages.
 
     Given a topic, extension, or command name, print help for that
     topic.
 
     Returns 0 if successful.
     """
 
     textwidth = min(ui.termwidth(), 80) - 2
 
     def helpcmd(name):
         try:
             aliases, entry = cmdutil.findcmd(name, table, strict=unknowncmd)
         except error.AmbiguousCommand, inst:
             # py3k fix: except vars can't be used outside the scope of the
             # except block, nor can be used inside a lambda. python issue4617
             prefix = inst.args[0]
             select = lambda c: c.lstrip('^').startswith(prefix)
             rst = helplist(select)
             return rst
 
         rst = []
 
         # check if it's an invalid alias and display its error if it is
         if getattr(entry[0], 'badalias', False):
             if not unknowncmd:
                 ui.pushbuffer()
                 entry[0](ui)
                 rst.append(ui.popbuffer())
             return rst
 
         # synopsis
         if len(entry) > 2:
             if entry[2].startswith('hg'):
                 rst.append("%s\n" % entry[2])
             else:
                 rst.append('hg %s %s\n' % (aliases[0], entry[2]))
         else:
             rst.append('hg %s\n' % aliases[0])
         # aliases
         if full and not ui.quiet and len(aliases) > 1:
             rst.append(_("\naliases: %s\n") % ', '.join(aliases[1:]))
         rst.append('\n')
 
         # description
         doc = gettext(entry[0].__doc__)
         if not doc:
             doc = _("(no help text available)")
         if util.safehasattr(entry[0], 'definition'):  # aliased command
             if entry[0].definition.startswith('!'):  # shell alias
                 doc = _('shell alias for::\n\n    %s') % entry[0].definition[1:]
             else:
                 doc = _('alias for: hg %s\n\n%s') % (entry[0].definition, doc)
         doc = doc.splitlines(True)
         if ui.quiet or not full:
             rst.append(doc[0])
         else:
             rst.extend(doc)
         rst.append('\n')
 
         # check if this command shadows a non-trivial (multi-line)
         # extension help text
         try:
             mod = extensions.find(name)
             doc = gettext(mod.__doc__) or ''
             if '\n' in doc.strip():
                 msg = _('use "hg help -e %s" to show help for '
                         'the %s extension') % (name, name)
                 rst.append('\n%s\n' % msg)
         except KeyError:
             pass
 
         # options
         if not ui.quiet and entry[1]:
             rst.append('\n%s\n\n' % _("options:"))
             rst.append(help.optrst(entry[1], ui.verbose))
 
         if ui.verbose:
             rst.append('\n%s\n\n' % _("global options:"))
             rst.append(help.optrst(globalopts, ui.verbose))
 
         if not ui.verbose:
             if not full:
                 rst.append(_('\nuse "hg help %s" to show the full help text\n')
                            % name)
             elif not ui.quiet:
                 omitted = _('use "hg -v help %s" to show more complete'
                             ' help and the global options') % name
                 notomitted = _('use "hg -v help %s" to show'
                                ' the global options') % name
                 help.indicateomitted(rst, omitted, notomitted)
 
         return rst
 
 
     def helplist(select=None):
         # list of commands
         if name == "shortlist":
             header = _('basic commands:\n\n')
         else:
             header = _('list of commands:\n\n')
 
         h = {}
         cmds = {}
         for c, e in table.iteritems():
             f = c.split("|", 1)[0]
             if select and not select(f):
                 continue
             if (not select and name != 'shortlist' and
                 e[0].__module__ != __name__):
                 continue
             if name == "shortlist" and not f.startswith("^"):
                 continue
             f = f.lstrip("^")
             if not ui.debugflag and f.startswith("debug"):
                 continue
             doc = e[0].__doc__
             if doc and 'DEPRECATED' in doc and not ui.verbose:
                 continue
             doc = gettext(doc)
             if not doc:
                 doc = _("(no help text available)")
             h[f] = doc.splitlines()[0].rstrip()
             cmds[f] = c.lstrip("^")
 
         rst = []
         if not h:
             if not ui.quiet:
                 rst.append(_('no commands defined\n'))
             return rst
 
         if not ui.quiet:
             rst.append(header)
         fns = sorted(h)
         for f in fns:
             if ui.verbose:
                 commands = cmds[f].replace("|",", ")
                 rst.append(" :%s: %s\n" % (commands, h[f]))
             else:
                 rst.append(' :%s: %s\n' % (f, h[f]))
 
         if not name:
             exts = help.listexts(_('enabled extensions:'), extensions.enabled())
             if exts:
                 rst.append('\n')
                 rst.extend(exts)
 
             rst.append(_("\nadditional help topics:\n\n"))
             topics = []
             for names, header, doc in help.helptable:
                 topics.append((names[0], header))
             for t, desc in topics:
                 rst.append(" :%s: %s\n" % (t, desc))
 
         optlist = []
         if not ui.quiet:
             if ui.verbose:
                 optlist.append((_("global options:"), globalopts))
                 if name == 'shortlist':
                     optlist.append((_('use "hg help" for the full list '
                                            'of commands'), ()))
             else:
                 if name == 'shortlist':
                     msg = _('use "hg help" for the full list of commands '
                             'or "hg -v" for details')
                 elif name and not full:
                     msg = _('use "hg help %s" to show the full help '
                             'text') % name
                 else:
                     msg = _('use "hg -v help%s" to show builtin aliases and '
                             'global options') % (name and " " + name or "")
                 optlist.append((msg, ()))
 
         if optlist:
             for title, options in optlist:
                 rst.append('\n%s\n' % title)
                 if options:
                     rst.append('\n%s\n' % help.optrst(options, ui.verbose))
         return rst
 
     def helptopic(name):
         for names, header, doc in help.helptable:
             if name in names:
                 break
         else:
             raise error.UnknownCommand(name)
 
         rst = ["%s\n\n" % header]
         # description
         if not doc:
             rst.append("    %s\n" % _("(no help text available)"))
         if util.safehasattr(doc, '__call__'):
             rst += ["    %s\n" % l for l in doc().splitlines()]
 
         if not ui.verbose:
             omitted = (_('use "hg help -v %s" to show more complete help') %
                        name)
             help.indicateomitted(rst, omitted)
 
         try:
             cmdutil.findcmd(name, table)
             rst.append(_('\nuse "hg help -c %s" to see help for '
                        'the %s command\n') % (name, name))
         except error.UnknownCommand:
             pass
         return rst
 
     def helpext(name):
         try:
             mod = extensions.find(name)
             doc = gettext(mod.__doc__) or _('no help text available')
         except KeyError:
             mod = None
             doc = extensions.disabledext(name)
             if not doc:
                 raise error.UnknownCommand(name)
 
         if '\n' not in doc:
             head, tail = doc, ""
         else:
             head, tail = doc.split('\n', 1)
         rst = [_('%s extension - %s\n\n') % (name.split('.')[-1], head)]
         if tail:
             rst.extend(tail.splitlines(True))
             rst.append('\n')
 
         if not ui.verbose:
             omitted = (_('use "hg help -v %s" to show more complete help') %
                        name)
             help.indicateomitted(rst, omitted)
 
         if mod:
             try:
                 ct = mod.cmdtable
             except AttributeError:
                 ct = {}
             modcmds = set([c.split('|', 1)[0] for c in ct])
             rst.extend(helplist(modcmds.__contains__))
         else:
             rst.append(_('use "hg help extensions" for information on enabling '
                        'extensions\n'))
         return rst
 
     def helpextcmd(name):
         cmd, ext, mod = extensions.disabledcmd(ui, name,
                                                ui.configbool('ui', 'strict'))
         doc = gettext(mod.__doc__).splitlines()[0]
 
         rst = help.listexts(_("'%s' is provided by the following "
                               "extension:") % cmd, {ext: doc}, indent=4)
         rst.append('\n')
         rst.append(_('use "hg help extensions" for information on enabling '
                    'extensions\n'))
         return rst
 
 
     rst = []
     kw = opts.get('keyword')
     if kw:
         matches = help.topicmatch(kw)
         for t, title in (('topics', _('Topics')),
                          ('commands', _('Commands')),
                          ('extensions', _('Extensions')),
                          ('extensioncommands', _('Extension Commands'))):
             if matches[t]:
                 rst.append('%s:\n\n' % title)
                 rst.extend(minirst.maketable(sorted(matches[t]), 1))
                 rst.append('\n')
     elif name and name != 'shortlist':
         i = None
         if unknowncmd:
             queries = (helpextcmd,)
         elif opts.get('extension'):
             queries = (helpext,)
         elif opts.get('command'):
             queries = (helpcmd,)
         else:
             queries = (helptopic, helpcmd, helpext, helpextcmd)
         for f in queries:
             try:
                 rst = f(name)
                 i = None
                 break
             except error.UnknownCommand, inst:
                 i = inst
         if i:
             raise i
     else:
         # program name
         if not ui.quiet:
             rst = [_("Mercurial Distributed SCM\n"), '\n']
         rst.extend(helplist())
 
     keep = ui.verbose and ['verbose'] or []
     text = ''.join(rst)
     formatted, pruned = minirst.format(text, textwidth, keep=keep)
     if 'verbose' in pruned:
         keep.append('omitted')
     else:
         keep.append('notomitted')
     formatted, pruned = minirst.format(text, textwidth, keep=keep)
     ui.write(formatted)
 
 
 @command('identify|id',
     [('r', 'rev', '',
      _('identify the specified revision'), _('REV')),
     ('n', 'num', None, _('show local revision number')),
     ('i', 'id', None, _('show global revision id')),
     ('b', 'branch', None, _('show branch')),
     ('t', 'tags', None, _('show tags')),
     ('B', 'bookmarks', None, _('show bookmarks')),
     ] + remoteopts,
     _('[-nibtB] [-r REV] [SOURCE]'))
 def identify(ui, repo, source=None, rev=None,
              num=None, id=None, branch=None, tags=None, bookmarks=None, **opts):
     """identify the working copy or specified revision
 
     Print a summary identifying the repository state at REV using one or
     two parent hash identifiers, followed by a "+" if the working
     directory has uncommitted changes, the branch name (if not default),
     a list of tags, and a list of bookmarks.
 
     When REV is not given, print a summary of the current state of the
     repository.
 
     Specifying a path to a repository root or Mercurial bundle will
     cause lookup to operate on that repository/bundle.
 
     .. container:: verbose
 
       Examples:
 
       - generate a build identifier for the working directory::
 
           hg id --id > build-id.dat
 
       - find the revision corresponding to a tag::
 
           hg id -n -r 1.3
 
       - check the most recent revision of a remote repository::
 
           hg id -r tip http://selenic.com/hg/
 
     Returns 0 if successful.
     """
 
     if not repo and not source:
         raise util.Abort(_("there is no Mercurial repository here "
                            "(.hg not found)"))
 
     hexfunc = ui.debugflag and hex or short
     default = not (num or id or branch or tags or bookmarks)
     output = []
     revs = []
 
     if source:
         source, branches = hg.parseurl(ui.expandpath(source))
         peer = hg.peer(repo or ui, opts, source) # only pass ui when no repo
         repo = peer.local()
         revs, checkout = hg.addbranchrevs(repo, peer, branches, None)
 
     if not repo:
         if num or branch or tags:
             raise util.Abort(
                 _("can't query remote revision number, branch, or tags"))
         if not rev and revs:
             rev = revs[0]
         if not rev:
             rev = "tip"
 
         remoterev = peer.lookup(rev)
         if default or id:
             output = [hexfunc(remoterev)]
 
         def getbms():
             bms = []
 
             if 'bookmarks' in peer.listkeys('namespaces'):
                 hexremoterev = hex(remoterev)
                 bms = [bm for bm, bmr in peer.listkeys('bookmarks').iteritems()
                        if bmr == hexremoterev]
 
             return bms
 
         if bookmarks:
             output.extend(getbms())
         elif default and not ui.quiet:
             # multiple bookmarks for a single parent separated by '/'
             bm = '/'.join(getbms())
             if bm:
                 output.append(bm)
     else:
         if not rev:
             ctx = repo[None]
             parents = ctx.parents()
             changed = ""
             if default or id or num:
                 if (util.any(repo.status())
                     or util.any(ctx.sub(s).dirty() for s in ctx.substate)):
                     changed = '+'
             if default or id:
                 output = ["%s%s" %
                   ('+'.join([hexfunc(p.node()) for p in parents]), changed)]
             if num:
                 output.append("%s%s" %
                   ('+'.join([str(p.rev()) for p in parents]), changed))
         else:
             ctx = scmutil.revsingle(repo, rev)
             if default or id:
                 output = [hexfunc(ctx.node())]
             if num:
                 output.append(str(ctx.rev()))
 
         if default and not ui.quiet:
             b = ctx.branch()
             if b != 'default':
                 output.append("(%s)" % b)
 
             # multiple tags for a single parent separated by '/'
             t = '/'.join(ctx.tags())
             if t:
                 output.append(t)
 
             # multiple bookmarks for a single parent separated by '/'
             bm = '/'.join(ctx.bookmarks())
             if bm:
                 output.append(bm)
         else:
             if branch:
                 output.append(ctx.branch())
 
             if tags:
                 output.extend(ctx.tags())
 
             if bookmarks:
                 output.extend(ctx.bookmarks())
 
     ui.write("%s\n" % ' '.join(output))
 
 @command('import|patch',
     [('p', 'strip', 1,
      _('directory strip option for patch. This has the same '
        'meaning as the corresponding patch option'), _('NUM')),
     ('b', 'base', '', _('base path (DEPRECATED)'), _('PATH')),
     ('e', 'edit', False, _('invoke editor on commit messages')),
     ('f', 'force', None, _('skip check for outstanding uncommitted changes')),
     ('', 'no-commit', None,
      _("don't commit, just update the working directory")),
     ('', 'bypass', None,
      _("apply patch without touching the working directory")),
     ('', 'exact', None,
      _('apply patch to the nodes from which it was generated')),
     ('', 'import-branch', None,
      _('use any branch information in patch (implied by --exact)'))] +
     commitopts + commitopts2 + similarityopts,
     _('[OPTION]... PATCH...'))
 def import_(ui, repo, patch1=None, *patches, **opts):
     """import an ordered set of patches
 
     Import a list of patches and commit them individually (unless
     --no-commit is specified).
 
     If there are outstanding changes in the working directory, import
     will abort unless given the -f/--force flag.
 
     You can import a patch straight from a mail message. Even patches
     as attachments work (to use the body part, it must have type
     text/plain or text/x-patch). From and Subject headers of email
     message are used as default committer and commit message. All
     text/plain body parts before first diff are added to commit
     message.
 
     If the imported patch was generated by :hg:`export`, user and
     description from patch override values from message headers and
     body. Values given on command line with -m/--message and -u/--user
     override these.
 
     If --exact is specified, import will set the working directory to
     the parent of each patch before applying it, and will abort if the
     resulting changeset has a different ID than the one recorded in
     the patch. This may happen due to character set problems or other
     deficiencies in the text patch format.
 
     Use --bypass to apply and commit patches directly to the
     repository, not touching the working directory. Without --exact,
     patches will be applied on top of the working directory parent
     revision.
 
     With -s/--similarity, hg will attempt to discover renames and
     copies in the patch in the same way as :hg:`addremove`.
 
     To read a patch from standard input, use "-" as the patch name. If
     a URL is specified, the patch will be downloaded from it.
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     .. container:: verbose
 
       Examples:
 
       - import a traditional patch from a website and detect renames::
 
           hg import -s 80 http://example.com/bugfix.patch
 
       - import a changeset from an hgweb server::
 
           hg import http://www.selenic.com/hg/rev/5ca8c111e9aa
 
       - import all the patches in an Unix-style mbox::
 
           hg import incoming-patches.mbox
 
       - attempt to exactly restore an exported changeset (not always
         possible)::
 
           hg import --exact proposed-fix.patch
 
     Returns 0 on success.
     """
 
     if not patch1:
         raise util.Abort(_('need at least one patch to import'))
 
     patches = (patch1,) + patches
 
     date = opts.get('date')
     if date:
         opts['date'] = util.parsedate(date)
 
     editor = cmdutil.commiteditor
     if opts.get('edit'):
         editor = cmdutil.commitforceeditor
 
     update = not opts.get('bypass')
     if not update and opts.get('no_commit'):
         raise util.Abort(_('cannot use --no-commit with --bypass'))
     try:
         sim = float(opts.get('similarity') or 0)
     except ValueError:
         raise util.Abort(_('similarity must be a number'))
     if sim < 0 or sim > 100:
         raise util.Abort(_('similarity must be between 0 and 100'))
     if sim and not update:
         raise util.Abort(_('cannot use --similarity with --bypass'))
 
     if (opts.get('exact') or not opts.get('force')) and update:
         cmdutil.bailifchanged(repo)
 
     base = opts["base"]
     strip = opts["strip"]
     wlock = lock = tr = None
     msgs = []
 
     def checkexact(repo, n, nodeid):
         if opts.get('exact') and hex(n) != nodeid:
             repo.rollback()
             raise util.Abort(_('patch is damaged or loses information'))
 
     def tryone(ui, hunk, parents):
         tmpname, message, user, date, branch, nodeid, p1, p2 = \
             patch.extract(ui, hunk)
 
         if not tmpname:
             return (None, None)
         msg = _('applied to working directory')
 
         try:
             cmdline_message = cmdutil.logmessage(ui, opts)
             if cmdline_message:
                 # pickup the cmdline msg
                 message = cmdline_message
             elif message:
                 # pickup the patch msg
                 message = message.strip()
             else:
                 # launch the editor
                 message = None
             ui.debug('message:\n%s\n' % message)
 
             if len(parents) == 1:
                 parents.append(repo[nullid])
             if opts.get('exact'):
                 if not nodeid or not p1:
                     raise util.Abort(_('not a Mercurial patch'))
                 p1 = repo[p1]
                 p2 = repo[p2 or nullid]
             elif p2:
                 try:
                     p1 = repo[p1]
                     p2 = repo[p2]
                     # Without any options, consider p2 only if the
                     # patch is being applied on top of the recorded
                     # first parent.
                     if p1 != parents[0]:
                         p1 = parents[0]
                         p2 = repo[nullid]
                 except error.RepoError:
                     p1, p2 = parents
             else:
                 p1, p2 = parents
 
             n = None
             if update:
                 if p1 != parents[0]:
                     hg.clean(repo, p1.node())
                 if p2 != parents[1]:
                     repo.setparents(p1.node(), p2.node())
 
                 if opts.get('exact') or opts.get('import_branch'):
                     repo.dirstate.setbranch(branch or 'default')
 
                 files = set()
                 patch.patch(ui, repo, tmpname, strip=strip, files=files,
                             eolmode=None, similarity=sim / 100.0)
                 files = list(files)
                 if opts.get('no_commit'):
                     if message:
                         msgs.append(message)
                 else:
                     if opts.get('exact') or p2:
                         # If you got here, you either use --force and know what
                         # you are doing or used --exact or a merge patch while
                         # being updated to its first parent.
                         m = None
                     else:
                         m = scmutil.matchfiles(repo, files or [])
                     n = repo.commit(message, opts.get('user') or user,
                                     opts.get('date') or date, match=m,
                                     editor=editor)
                     checkexact(repo, n, nodeid)
             else:
                 if opts.get('exact') or opts.get('import_branch'):
                     branch = branch or 'default'
                 else:
                     branch = p1.branch()
                 store = patch.filestore()
                 try:
                     files = set()
                     try:
                         patch.patchrepo(ui, repo, p1, store, tmpname, strip,
                                         files, eolmode=None)
                     except patch.PatchError, e:
                         raise util.Abort(str(e))
                     memctx = patch.makememctx(repo, (p1.node(), p2.node()),
                                               message,
                                               opts.get('user') or user,
                                               opts.get('date') or date,
                                               branch, files, store,
                                               editor=cmdutil.commiteditor)
                     repo.savecommitmessage(memctx.description())
                     n = memctx.commit()
                     checkexact(repo, n, nodeid)
                 finally:
                     store.close()
             if n:
                 # i18n: refers to a short changeset id
                 msg = _('created %s') % short(n)
             return (msg, n)
         finally:
             os.unlink(tmpname)
 
     try:
         try:
             wlock = repo.wlock()
             if not opts.get('no_commit'):
                 lock = repo.lock()
                 tr = repo.transaction('import')
             parents = repo.parents()
             for patchurl in patches:
                 if patchurl == '-':
                     ui.status(_('applying patch from stdin\n'))
                     patchfile = ui.fin
                     patchurl = 'stdin'      # for error message
                 else:
                     patchurl = os.path.join(base, patchurl)
                     ui.status(_('applying %s\n') % patchurl)
-                    patchfile = url.open(ui, patchurl)
+                    patchfile = hg.openpath(ui, patchurl)
 
                 haspatch = False
                 for hunk in patch.split(patchfile):
                     (msg, node) = tryone(ui, hunk, parents)
                     if msg:
                         haspatch = True
                         ui.note(msg + '\n')
                     if update or opts.get('exact'):
                         parents = repo.parents()
                     else:
                         parents = [repo[node]]
 
                 if not haspatch:
                     raise util.Abort(_('%s: no diffs found') % patchurl)
 
             if tr:
                 tr.close()
             if msgs:
                 repo.savecommitmessage('\n* * *\n'.join(msgs))
         except: # re-raises
             # wlock.release() indirectly calls dirstate.write(): since
             # we're crashing, we do not want to change the working dir
             # parent after all, so make sure it writes nothing
             repo.dirstate.invalidate()
             raise
     finally:
         if tr:
             tr.release()
         release(lock, wlock)
 
 @command('incoming|in',
     [('f', 'force', None,
      _('run even if remote repository is unrelated')),
     ('n', 'newest-first', None, _('show newest record first')),
     ('', 'bundle', '',
      _('file to store the bundles into'), _('FILE')),
     ('r', 'rev', [], _('a remote changeset intended to be added'), _('REV')),
     ('B', 'bookmarks', False, _("compare bookmarks")),
     ('b', 'branch', [],
      _('a specific branch you would like to pull'), _('BRANCH')),
     ] + logopts + remoteopts + subrepoopts,
     _('[-p] [-n] [-M] [-f] [-r REV]... [--bundle FILENAME] [SOURCE]'))
 def incoming(ui, repo, source="default", **opts):
     """show new changesets found in source
 
     Show new changesets found in the specified path/URL or the default
     pull location. These are the changesets that would have been pulled
     if a pull at the time you issued this command.
 
     For remote repository, using --bundle avoids downloading the
     changesets twice if the incoming is followed by a pull.
 
     See pull for valid source format details.
 
     Returns 0 if there are incoming changes, 1 otherwise.
     """
     if opts.get('graph'):
         cmdutil.checkunsupportedgraphflags([], opts)
         def display(other, chlist, displayer):
             revdag = cmdutil.graphrevs(other, chlist, opts)
             showparents = [ctx.node() for ctx in repo[None].parents()]
             cmdutil.displaygraph(ui, revdag, displayer, showparents,
                                  graphmod.asciiedges)
 
         hg._incoming(display, lambda: 1, ui, repo, source, opts, buffered=True)
         return 0
 
     if opts.get('bundle') and opts.get('subrepos'):
         raise util.Abort(_('cannot combine --bundle and --subrepos'))
 
     if opts.get('bookmarks'):
         source, branches = hg.parseurl(ui.expandpath(source),
                                        opts.get('branch'))
         other = hg.peer(repo, opts, source)
         if 'bookmarks' not in other.listkeys('namespaces'):
             ui.warn(_("remote doesn't support bookmarks\n"))
             return 0
         ui.status(_('comparing with %s\n') % util.hidepassword(source))
         return bookmarks.diff(ui, repo, other)
 
     repo._subtoppath = ui.expandpath(source)
     try:
         return hg.incoming(ui, repo, source, opts)
     finally:
         del repo._subtoppath
 
 
 @command('^init', remoteopts, _('[-e CMD] [--remotecmd CMD] [DEST]'))
 def init(ui, dest=".", **opts):
     """create a new repository in the given directory
 
     Initialize a new repository in the given directory. If the given
     directory does not exist, it will be created.
 
     If no directory is given, the current directory is used.
 
     It is possible to specify an ``ssh://`` URL as the destination.
     See :hg:`help urls` for more information.
 
     Returns 0 on success.
     """
     hg.peer(ui, opts, ui.expandpath(dest), create=True)
 
 @command('locate',
     [('r', 'rev', '', _('search the repository as it is in REV'), _('REV')),
     ('0', 'print0', None, _('end filenames with NUL, for use with xargs')),
     ('f', 'fullpath', None, _('print complete paths from the filesystem root')),
     ] + walkopts,
     _('[OPTION]... [PATTERN]...'))
 def locate(ui, repo, *pats, **opts):
     """locate files matching specific patterns
 
     Print files under Mercurial control in the working directory whose
     names match the given patterns.
 
     By default, this command searches all directories in the working
     directory. To search just the current directory and its
     subdirectories, use "--include .".
 
     If no patterns are given to match, this command prints the names
     of all files under Mercurial control in the working directory.
 
     If you want to feed the output of this command into the "xargs"
     command, use the -0 option to both this command and "xargs". This
     will avoid the problem of "xargs" treating single filenames that
     contain whitespace as multiple filenames.
 
     Returns 0 if a match is found, 1 otherwise.
     """
     end = opts.get('print0') and '\0' or '\n'
     rev = scmutil.revsingle(repo, opts.get('rev'), None).node()
 
     ret = 1
     m = scmutil.match(repo[rev], pats, opts, default='relglob')
     m.bad = lambda x, y: False
     for abs in repo[rev].walk(m):
         if not rev and abs not in repo.dirstate:
             continue
         if opts.get('fullpath'):
             ui.write(repo.wjoin(abs), end)
         else:
             ui.write(((pats and m.rel(abs)) or abs), end)
         ret = 0
 
     return ret
 
 @command('^log|history',
     [('f', 'follow', None,
      _('follow changeset history, or file history across copies and renames')),
     ('', 'follow-first', None,
      _('only follow the first parent of merge changesets (DEPRECATED)')),
     ('d', 'date', '', _('show revisions matching date spec'), _('DATE')),
     ('C', 'copies', None, _('show copied files')),
     ('k', 'keyword', [],
      _('do case-insensitive search for a given text'), _('TEXT')),
     ('r', 'rev', [], _('show the specified revision or range'), _('REV')),
     ('', 'removed', None, _('include revisions where files were removed')),
     ('m', 'only-merges', None, _('show only merges (DEPRECATED)')),
     ('u', 'user', [], _('revisions committed by user'), _('USER')),
     ('', 'only-branch', [],
      _('show only changesets within the given named branch (DEPRECATED)'),
      _('BRANCH')),
     ('b', 'branch', [],
      _('show changesets within the given named branch'), _('BRANCH')),
     ('P', 'prune', [],
      _('do not display revision or any of its ancestors'), _('REV')),
     ('', 'hidden', False, _('show hidden changesets (DEPRECATED)')),
     ] + logopts + walkopts,
     _('[OPTION]... [FILE]'))
 def log(ui, repo, *pats, **opts):
     """show revision history of entire repository or files
 
     Print the revision history of the specified files or the entire
     project.
 
     If no revision range is specified, the default is ``tip:0`` unless
     --follow is set, in which case the working directory parent is
     used as the starting revision.
 
     File history is shown without following rename or copy history of
     files. Use -f/--follow with a filename to follow history across
     renames and copies. --follow without a filename will only show
     ancestors or descendants of the starting revision.
 
     By default this command prints revision number and changeset id,
     tags, non-trivial parents, user, date and time, and a summary for
     each commit. When the -v/--verbose switch is used, the list of
     changed files and full commit message are shown.
 
     .. note::
        log -p/--patch may generate unexpected diff output for merge
        changesets, as it will only compare the merge changeset against
        its first parent. Also, only files different from BOTH parents
        will appear in files:.
 
     .. note::
        for performance reasons, log FILE may omit duplicate changes
        made on branches and will not show deletions. To see all
        changes including duplicates and deletions, use the --removed
        switch.
 
     .. container:: verbose
 
       Some examples:
 
       - changesets with full descriptions and file lists::
 
           hg log -v
 
       - changesets ancestral to the working directory::
 
           hg log -f
 
       - last 10 commits on the current branch::
 
           hg log -l 10 -b .
 
       - changesets showing all modifications of a file, including removals::
 
           hg log --removed file.c
 
       - all changesets that touch a directory, with diffs, excluding merges::
 
           hg log -Mp lib/
 
       - all revision numbers that match a keyword::
 
           hg log -k bug --template "{rev}\\n"
 
       - check if a given changeset is included is a tagged release::
 
           hg log -r "a21ccf and ancestor(1.9)"
 
       - find all changesets by some user in a date range::
 
           hg log -k alice -d "may 2008 to jul 2008"
 
       - summary of all changesets after the last tag::
 
           hg log -r "last(tagged())::" --template "{desc|firstline}\\n"
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     See :hg:`help revisions` and :hg:`help revsets` for more about
     specifying revisions.
 
     See :hg:`help templates` for more about pre-packaged styles and
     specifying custom templates.
 
     Returns 0 on success.
     """
     if opts.get('graph'):
         return cmdutil.graphlog(ui, repo, *pats, **opts)
 
     matchfn = scmutil.match(repo[None], pats, opts)
     limit = cmdutil.loglimit(opts)
     count = 0
 
     getrenamed, endrev = None, None
     if opts.get('copies'):
         if opts.get('rev'):
             endrev = max(scmutil.revrange(repo, opts.get('rev'))) + 1
         getrenamed = templatekw.getrenamedfn(repo, endrev=endrev)
 
     df = False
     if opts.get("date"):
         df = util.matchdate(opts["date"])
 
     branches = opts.get('branch', []) + opts.get('only_branch', [])
     opts['branch'] = [repo.lookupbranch(b) for b in branches]
 
     displayer = cmdutil.show_changeset(ui, repo, opts, True)
     def prep(ctx, fns):
         rev = ctx.rev()
         parents = [p for p in repo.changelog.parentrevs(rev)
                    if p != nullrev]
         if opts.get('no_merges') and len(parents) == 2:
             return
         if opts.get('only_merges') and len(parents) != 2:
             return
         if opts.get('branch') and ctx.branch() not in opts['branch']:
             return
         if not opts.get('hidden') and ctx.hidden():
             return
         if df and not df(ctx.date()[0]):
             return
 
         lower = encoding.lower
         if opts.get('user'):
             luser = lower(ctx.user())
             for k in [lower(x) for x in opts['user']]:
                 if (k in luser):
                     break
             else:
                 return
         if opts.get('keyword'):
             luser = lower(ctx.user())
             ldesc = lower(ctx.description())
             lfiles = lower(" ".join(ctx.files()))
             for k in [lower(x) for x in opts['keyword']]:
                 if (k in luser or k in ldesc or k in lfiles):
                     break
             else:
                 return
 
         copies = None
         if getrenamed is not None and rev:
             copies = []
             for fn in ctx.files():
                 rename = getrenamed(fn, rev)
                 if rename:
                     copies.append((fn, rename[0]))
 
         revmatchfn = None
         if opts.get('patch') or opts.get('stat'):
             if opts.get('follow') or opts.get('follow_first'):
                 # note: this might be wrong when following through merges
                 revmatchfn = scmutil.match(repo[None], fns, default='path')
             else:
                 revmatchfn = matchfn
 
         displayer.show(ctx, copies=copies, matchfn=revmatchfn)
 
     for ctx in cmdutil.walkchangerevs(repo, matchfn, opts, prep):
         if count == limit:
             break
         if displayer.flush(ctx.rev()):
             count += 1
     displayer.close()
 
 @command('manifest',
     [('r', 'rev', '', _('revision to display'), _('REV')),
      ('', 'all', False, _("list files from all revisions"))],
     _('[-r REV]'))
 def manifest(ui, repo, node=None, rev=None, **opts):
     """output the current or given revision of the project manifest
 
     Print a list of version controlled files for the given revision.
     If no revision is given, the first parent of the working directory
     is used, or the null revision if no revision is checked out.
 
     With -v, print file permissions, symlink and executable bits.
     With --debug, print file revision hashes.
 
     If option --all is specified, the list of all files from all revisions
     is printed. This includes deleted and renamed files.
 
     Returns 0 on success.
     """
     if opts.get('all'):
         if rev or node:
             raise util.Abort(_("can't specify a revision with --all"))
 
         res = []
         prefix = "data/"
         suffix = ".i"
         plen = len(prefix)
         slen = len(suffix)
         lock = repo.lock()
         try:
             for fn, b, size in repo.store.datafiles():
                 if size != 0 and fn[-slen:] == suffix and fn[:plen] == prefix:
                     res.append(fn[plen:-slen])
         finally:
             lock.release()
         for f in res:
             ui.write("%s\n" % f)
         return
 
     if rev and node:
         raise util.Abort(_("please specify just one revision"))
 
     if not node:
         node = rev
 
     decor = {'l':'644 @ ', 'x':'755 * ', '':'644   '}
     ctx = scmutil.revsingle(repo, node)
     for f in ctx:
         if ui.debugflag:
             ui.write("%40s " % hex(ctx.manifest()[f]))
         if ui.verbose:
             ui.write(decor[ctx.flags(f)])
         ui.write("%s\n" % f)
 
 @command('^merge',
     [('f', 'force', None, _('force a merge with outstanding changes')),
     ('r', 'rev', '', _('revision to merge'), _('REV')),
     ('P', 'preview', None,
      _('review revisions to merge (no merge is performed)'))
      ] + mergetoolopts,
     _('[-P] [-f] [[-r] REV]'))
 def merge(ui, repo, node=None, **opts):
     """merge working directory with another revision
 
     The current working directory is updated with all changes made in
     the requested revision since the last common predecessor revision.
 
     Files that changed between either parent are marked as changed for
     the next commit and a commit must be performed before any further
     updates to the repository are allowed. The next commit will have
     two parents.
 
     ``--tool`` can be used to specify the merge tool used for file
     merges. It overrides the HGMERGE environment variable and your
     configuration files. See :hg:`help merge-tools` for options.
 
     If no revision is specified, the working directory's parent is a
     head revision, and the current branch contains exactly one other
     head, the other head is merged with by default. Otherwise, an
     explicit revision with which to merge with must be provided.
 
     :hg:`resolve` must be used to resolve unresolved files.
 
     To undo an uncommitted merge, use :hg:`update --clean .` which
     will check out a clean copy of the original merge parent, losing
     all changes.
 
     Returns 0 on success, 1 if there are unresolved files.
     """
 
     if opts.get('rev') and node:
         raise util.Abort(_("please specify just one revision"))
     if not node:
         node = opts.get('rev')
 
     if node:
         node = scmutil.revsingle(repo, node).node()
 
     if not node and repo._bookmarkcurrent:
         bmheads = repo.bookmarkheads(repo._bookmarkcurrent)
         curhead = repo[repo._bookmarkcurrent]
         if len(bmheads) == 2:
             if curhead == bmheads[0]:
                 node = bmheads[1]
             else:
                 node = bmheads[0]
         elif len(bmheads) > 2:
             raise util.Abort(_("multiple matching bookmarks to merge - "
                 "please merge with an explicit rev or bookmark"),
                 hint=_("run 'hg heads' to see all heads"))
         elif len(bmheads) <= 1:
             raise util.Abort(_("no matching bookmark to merge - "
                 "please merge with an explicit rev or bookmark"),
                 hint=_("run 'hg heads' to see all heads"))
 
     if not node and not repo._bookmarkcurrent:
         branch = repo[None].branch()
         bheads = repo.branchheads(branch)
         nbhs = [bh for bh in bheads if not repo[bh].bookmarks()]
 
         if len(nbhs) > 2:
             raise util.Abort(_("branch '%s' has %d heads - "
                                "please merge with an explicit rev")
                              % (branch, len(bheads)),
                              hint=_("run 'hg heads .' to see heads"))
 
         parent = repo.dirstate.p1()
         if len(nbhs) <= 1:
             if len(bheads) > 1:
                 raise util.Abort(_("heads are bookmarked - "
                                    "please merge with an explicit rev"),
                                  hint=_("run 'hg heads' to see all heads"))
             if len(repo.heads()) > 1:
                 raise util.Abort(_("branch '%s' has one head - "
                                    "please merge with an explicit rev")
                                  % branch,
                                  hint=_("run 'hg heads' to see all heads"))
             msg, hint = _('nothing to merge'), None
             if parent != repo.lookup(branch):
                 hint = _("use 'hg update' instead")
             raise util.Abort(msg, hint=hint)
 
         if parent not in bheads:
             raise util.Abort(_('working directory not at a head revision'),
                              hint=_("use 'hg update' or merge with an "
                                     "explicit revision"))
         if parent == nbhs[0]:
             node = nbhs[-1]
         else:
             node = nbhs[0]
 
     if opts.get('preview'):
         # find nodes that are ancestors of p2 but not of p1
         p1 = repo.lookup('.')
         p2 = repo.lookup(node)
         nodes = repo.changelog.findmissing(common=[p1], heads=[p2])
 
         displayer = cmdutil.show_changeset(ui, repo, opts)
         for node in nodes:
             displayer.show(repo[node])
         displayer.close()
         return 0
 
     try:
         # ui.forcemerge is an internal variable, do not document
         repo.ui.setconfig('ui', 'forcemerge', opts.get('tool', ''))
         return hg.merge(repo, node, force=opts.get('force'))
     finally:
         ui.setconfig('ui', 'forcemerge', '')
 
 @command('outgoing|out',
     [('f', 'force', None, _('run even when the destination is unrelated')),
     ('r', 'rev', [],
      _('a changeset intended to be included in the destination'), _('REV')),
     ('n', 'newest-first', None, _('show newest record first')),
     ('B', 'bookmarks', False, _('compare bookmarks')),
     ('b', 'branch', [], _('a specific branch you would like to push'),
      _('BRANCH')),
     ] + logopts + remoteopts + subrepoopts,
     _('[-M] [-p] [-n] [-f] [-r REV]... [DEST]'))
 def outgoing(ui, repo, dest=None, **opts):
     """show changesets not found in the destination
 
     Show changesets not found in the specified destination repository
     or the default push location. These are the changesets that would
     be pushed if a push was requested.
 
     See pull for details of valid destination formats.
 
     Returns 0 if there are outgoing changes, 1 otherwise.
     """
     if opts.get('graph'):
         cmdutil.checkunsupportedgraphflags([], opts)
         o = hg._outgoing(ui, repo, dest, opts)
         if o is None:
             return
 
         revdag = cmdutil.graphrevs(repo, o, opts)
         displayer = cmdutil.show_changeset(ui, repo, opts, buffered=True)
         showparents = [ctx.node() for ctx in repo[None].parents()]
         cmdutil.displaygraph(ui, revdag, displayer, showparents,
                              graphmod.asciiedges)
         return 0
 
     if opts.get('bookmarks'):
         dest = ui.expandpath(dest or 'default-push', dest or 'default')
         dest, branches = hg.parseurl(dest, opts.get('branch'))
         other = hg.peer(repo, opts, dest)
         if 'bookmarks' not in other.listkeys('namespaces'):
             ui.warn(_("remote doesn't support bookmarks\n"))
             return 0
         ui.status(_('comparing with %s\n') % util.hidepassword(dest))
         return bookmarks.diff(ui, other, repo)
 
     repo._subtoppath = ui.expandpath(dest or 'default-push', dest or 'default')
     try:
         return hg.outgoing(ui, repo, dest, opts)
     finally:
         del repo._subtoppath
 
 @command('parents',
     [('r', 'rev', '', _('show parents of the specified revision'), _('REV')),
     ] + templateopts,
     _('[-r REV] [FILE]'))
 def parents(ui, repo, file_=None, **opts):
     """show the parents of the working directory or revision
 
     Print the working directory's parent revisions. If a revision is
     given via -r/--rev, the parent of that revision will be printed.
     If a file argument is given, the revision in which the file was
     last changed (before the working directory revision or the
     argument to --rev if given) is printed.
 
     Returns 0 on success.
     """
 
     ctx = scmutil.revsingle(repo, opts.get('rev'), None)
 
     if file_:
         m = scmutil.match(ctx, (file_,), opts)
         if m.anypats() or len(m.files()) != 1:
             raise util.Abort(_('can only specify an explicit filename'))
         file_ = m.files()[0]
         filenodes = []
         for cp in ctx.parents():
             if not cp:
                 continue
             try:
                 filenodes.append(cp.filenode(file_))
             except error.LookupError:
                 pass
         if not filenodes:
             raise util.Abort(_("'%s' not found in manifest!") % file_)
         fl = repo.file(file_)
         p = [repo.lookup(fl.linkrev(fl.rev(fn))) for fn in filenodes]
     else:
         p = [cp.node() for cp in ctx.parents()]
 
     displayer = cmdutil.show_changeset(ui, repo, opts)
     for n in p:
         if n != nullid:
             displayer.show(repo[n])
     displayer.close()
 
 @command('paths', [], _('[NAME]'))
 def paths(ui, repo, search=None):
     """show aliases for remote repositories
 
     Show definition of symbolic path name NAME. If no name is given,
     show definition of all available names.
 
     Option -q/--quiet suppresses all output when searching for NAME
     and shows only the path names when listing all definitions.
 
     Path names are defined in the [paths] section of your
     configuration file and in ``/etc/mercurial/hgrc``. If run inside a
     repository, ``.hg/hgrc`` is used, too.
 
     The path names ``default`` and ``default-push`` have a special
     meaning.  When performing a push or pull operation, they are used
     as fallbacks if no location is specified on the command-line.
     When ``default-push`` is set, it will be used for push and
     ``default`` will be used for pull; otherwise ``default`` is used
     as the fallback for both.  When cloning a repository, the clone
     source is written as ``default`` in ``.hg/hgrc``.  Note that
     ``default`` and ``default-push`` apply to all inbound (e.g.
     :hg:`incoming`) and outbound (e.g. :hg:`outgoing`, :hg:`email` and
     :hg:`bundle`) operations.
 
     See :hg:`help urls` for more information.
 
     Returns 0 on success.
     """
     if search:
         for name, path in ui.configitems("paths"):
             if name == search:
                 ui.status("%s\n" % util.hidepassword(path))
                 return
         if not ui.quiet:
             ui.warn(_("not found!\n"))
         return 1
     else:
         for name, path in ui.configitems("paths"):
             if ui.quiet:
                 ui.write("%s\n" % name)
             else:
                 ui.write("%s = %s\n" % (name, util.hidepassword(path)))
 
 @command('^phase',
     [('p', 'public', False, _('set changeset phase to public')),
      ('d', 'draft', False, _('set changeset phase to draft')),
      ('s', 'secret', False, _('set changeset phase to secret')),
      ('f', 'force', False, _('allow to move boundary backward')),
      ('r', 'rev', [], _('target revision'), _('REV')),
     ],
     _('[-p|-d|-s] [-f] [-r] REV...'))
 def phase(ui, repo, *revs, **opts):
     """set or show the current phase name
 
     With no argument, show the phase name of specified revisions.
 
     With one of -p/--public, -d/--draft or -s/--secret, change the
     phase value of the specified revisions.
 
     Unless -f/--force is specified, :hg:`phase` won't move changeset from a
     lower phase to an higher phase. Phases are ordered as follows::
 
         public < draft < secret
 
     Return 0 on success, 1 if no phases were changed or some could not
     be changed.
     """
     # search for a unique phase argument
     targetphase = None
     for idx, name in enumerate(phases.phasenames):
         if opts[name]:
             if targetphase is not None:
                 raise util.Abort(_('only one phase can be specified'))
             targetphase = idx
 
     # look for specified revision
     revs = list(revs)
     revs.extend(opts['rev'])
     if not revs:
         raise util.Abort(_('no revisions specified'))
 
     revs = scmutil.revrange(repo, revs)
 
     lock = None
     ret = 0
     if targetphase is None:
         # display
         for r in revs:
             ctx = repo[r]
             ui.write('%i: %s\n' % (ctx.rev(), ctx.phasestr()))
     else:
         lock = repo.lock()
         try:
             # set phase
             if not revs:
                 raise util.Abort(_('empty revision set'))
             nodes = [repo[r].node() for r in revs]
             olddata = repo._phasecache.getphaserevs(repo)[:]
             phases.advanceboundary(repo, targetphase, nodes)
             if opts['force']:
                 phases.retractboundary(repo, targetphase, nodes)
         finally:
             lock.release()
         newdata = repo._phasecache.getphaserevs(repo)
         changes = sum(o != newdata[i] for i, o in enumerate(olddata))
         rejected = [n for n in nodes
                     if newdata[repo[n].rev()] < targetphase]
         if rejected:
             ui.warn(_('cannot move %i changesets to a more permissive '
                       'phase, use --force\n') % len(rejected))
             ret = 1
         if changes:
             msg = _('phase changed for %i changesets\n') % changes
             if ret:
                 ui.status(msg)
             else:
                 ui.note(msg)
         else:
             ui.warn(_('no phases changed\n'))
             ret = 1
     return ret
 
 def postincoming(ui, repo, modheads, optupdate, checkout):
     if modheads == 0:
         return
     if optupdate:
         movemarkfrom = repo['.'].node()
         try:
             ret = hg.update(repo, checkout)
         except util.Abort, inst:
             ui.warn(_("not updating: %s\n") % str(inst))
             return 0
         if not ret and not checkout:
             if bookmarks.update(repo, [movemarkfrom], repo['.'].node()):
                 ui.status(_("updating bookmark %s\n") % repo._bookmarkcurrent)
         return ret
     if modheads > 1:
         currentbranchheads = len(repo.branchheads())
         if currentbranchheads == modheads:
             ui.status(_("(run 'hg heads' to see heads, 'hg merge' to merge)\n"))
         elif currentbranchheads > 1:
             ui.status(_("(run 'hg heads .' to see heads, 'hg merge' to "
                         "merge)\n"))
         else:
             ui.status(_("(run 'hg heads' to see heads)\n"))
     else:
         ui.status(_("(run 'hg update' to get a working copy)\n"))
 
 @command('^pull',
     [('u', 'update', None,
      _('update to new branch head if changesets were pulled')),
     ('f', 'force', None, _('run even when remote repository is unrelated')),
     ('r', 'rev', [], _('a remote changeset intended to be added'), _('REV')),
     ('B', 'bookmark', [], _("bookmark to pull"), _('BOOKMARK')),
     ('b', 'branch', [], _('a specific branch you would like to pull'),
      _('BRANCH')),
     ] + remoteopts,
     _('[-u] [-f] [-r REV]... [-e CMD] [--remotecmd CMD] [SOURCE]'))
 def pull(ui, repo, source="default", **opts):
     """pull changes from the specified source
 
     Pull changes from a remote repository to a local one.
 
     This finds all changes from the repository at the specified path
     or URL and adds them to a local repository (the current one unless
     -R is specified). By default, this does not update the copy of the
     project in the working directory.
 
     Use :hg:`incoming` if you want to see what would have been added
     by a pull at the time you issued this command. If you then decide
     to add those changes to the repository, you should use :hg:`pull
     -r X` where ``X`` is the last changeset listed by :hg:`incoming`.
 
     If SOURCE is omitted, the 'default' path will be used.
     See :hg:`help urls` for more information.
 
     Returns 0 on success, 1 if an update had unresolved files.
     """
     source, branches = hg.parseurl(ui.expandpath(source), opts.get('branch'))
     other = hg.peer(repo, opts, source)
     ui.status(_('pulling from %s\n') % util.hidepassword(source))
     revs, checkout = hg.addbranchrevs(repo, other, branches, opts.get('rev'))
 
     if opts.get('bookmark'):
         if not revs:
             revs = []
         rb = other.listkeys('bookmarks')
         for b in opts['bookmark']:
             if b not in rb:
                 raise util.Abort(_('remote bookmark %s not found!') % b)
             revs.append(rb[b])
 
     if revs:
         try:
             revs = [other.lookup(rev) for rev in revs]
         except error.CapabilityError:
             err = _("other repository doesn't support revision lookup, "
                     "so a rev cannot be specified.")
             raise util.Abort(err)
 
     modheads = repo.pull(other, heads=revs, force=opts.get('force'))
     bookmarks.updatefromremote(ui, repo, other, source)
     if checkout:
         checkout = str(repo.changelog.rev(other.lookup(checkout)))
     repo._subtoppath = source
     try:
         ret = postincoming(ui, repo, modheads, opts.get('update'), checkout)
 
     finally:
         del repo._subtoppath
 
     # update specified bookmarks
     if opts.get('bookmark'):
         for b in opts['bookmark']:
             # explicit pull overrides local bookmark if any
             ui.status(_("importing bookmark %s\n") % b)
             repo._bookmarks[b] = repo[rb[b]].node()
         bookmarks.write(repo)
 
     return ret
 
 @command('^push',
     [('f', 'force', None, _('force push')),
     ('r', 'rev', [],
      _('a changeset intended to be included in the destination'),
      _('REV')),
     ('B', 'bookmark', [], _("bookmark to push"), _('BOOKMARK')),
     ('b', 'branch', [],
      _('a specific branch you would like to push'), _('BRANCH')),
     ('', 'new-branch', False, _('allow pushing a new branch')),
     ] + remoteopts,
     _('[-f] [-r REV]... [-e CMD] [--remotecmd CMD] [DEST]'))
 def push(ui, repo, dest=None, **opts):
     """push changes to the specified destination
 
     Push changesets from the local repository to the specified
     destination.
 
     This operation is symmetrical to pull: it is identical to a pull
     in the destination repository from the current one.
 
     By default, push will not allow creation of new heads at the
     destination, since multiple heads would make it unclear which head
     to use. In this situation, it is recommended to pull and merge
     before pushing.
 
     Use --new-branch if you want to allow push to create a new named
     branch that is not present at the destination. This allows you to
     only create a new branch without forcing other changes.
 
     Use -f/--force to override the default behavior and push all
     changesets on all branches.
 
     If -r/--rev is used, the specified revision and all its ancestors
     will be pushed to the remote repository.
 
     If -B/--bookmark is used, the specified bookmarked revision, its
     ancestors, and the bookmark will be pushed to the remote
     repository.
 
     Please see :hg:`help urls` for important details about ``ssh://``
     URLs. If DESTINATION is omitted, a default path will be used.
 
     Returns 0 if push was successful, 1 if nothing to push.
     """
 
     if opts.get('bookmark'):
         for b in opts['bookmark']:
             # translate -B options to -r so changesets get pushed
             if b in repo._bookmarks:
                 opts.setdefault('rev', []).append(b)
             else:
                 # if we try to push a deleted bookmark, translate it to null
                 # this lets simultaneous -r, -b options continue working
                 opts.setdefault('rev', []).append("null")
 
     dest = ui.expandpath(dest or 'default-push', dest or 'default')
     dest, branches = hg.parseurl(dest, opts.get('branch'))
     ui.status(_('pushing to %s\n') % util.hidepassword(dest))
     revs, checkout = hg.addbranchrevs(repo, repo, branches, opts.get('rev'))
     other = hg.peer(repo, opts, dest)
     if revs:
         revs = [repo.lookup(r) for r in scmutil.revrange(repo, revs)]
 
     repo._subtoppath = dest
     try:
         # push subrepos depth-first for coherent ordering
         c = repo['']
         subs = c.substate # only repos that are committed
         for s in sorted(subs):
             if c.sub(s).push(opts) == 0:
                 return False
     finally:
         del repo._subtoppath
     result = repo.push(other, opts.get('force'), revs=revs,
                        newbranch=opts.get('new_branch'))
 
     result = not result
 
     if opts.get('bookmark'):
         rb = other.listkeys('bookmarks')
         for b in opts['bookmark']:
             # explicit push overrides remote bookmark if any
             if b in repo._bookmarks:
                 ui.status(_("exporting bookmark %s\n") % b)
                 new = repo[b].hex()
             elif b in rb:
                 ui.status(_("deleting remote bookmark %s\n") % b)
                 new = '' # delete
             else:
                 ui.warn(_('bookmark %s does not exist on the local '
                           'or remote repository!\n') % b)
                 return 2
             old = rb.get(b, '')
             r = other.pushkey('bookmarks', b, old, new)
             if not r:
                 ui.warn(_('updating bookmark %s failed!\n') % b)
                 if not result:
                     result = 2
 
     return result
 
 @command('recover', [])
 def recover(ui, repo):
     """roll back an interrupted transaction
 
     Recover from an interrupted commit or pull.
 
     This command tries to fix the repository status after an
     interrupted operation. It should only be necessary when Mercurial
     suggests it.
 
     Returns 0 if successful, 1 if nothing to recover or verify fails.
     """
     if repo.recover():
         return hg.verify(repo)
     return 1
 
 @command('^remove|rm',
     [('A', 'after', None, _('record delete for missing files')),
     ('f', 'force', None,
      _('remove (and delete) file even if added or modified')),
     ] + walkopts,
     _('[OPTION]... FILE...'))
 def remove(ui, repo, *pats, **opts):
     """remove the specified files on the next commit
 
     Schedule the indicated files for removal from the current branch.
 
     This command schedules the files to be removed at the next commit.
     To undo a remove before that, see :hg:`revert`. To undo added
     files, see :hg:`forget`.
 
     .. container:: verbose
 
       -A/--after can be used to remove only files that have already
       been deleted, -f/--force can be used to force deletion, and -Af
       can be used to remove files from the next revision without
       deleting them from the working directory.
 
       The following table details the behavior of remove for different
       file states (columns) and option combinations (rows). The file
       states are Added [A], Clean [C], Modified [M] and Missing [!]
       (as reported by :hg:`status`). The actions are Warn, Remove
       (from branch) and Delete (from disk):
 
       ======= == == == ==
               A  C  M  !
       ======= == == == ==
       none    W  RD W  R
       -f      R  RD RD R
       -A      W  W  W  R
       -Af     R  R  R  R
       ======= == == == ==
 
       Note that remove never deletes files in Added [A] state from the
       working directory, not even if option --force is specified.
 
     Returns 0 on success, 1 if any warnings encountered.
     """
 
     ret = 0
     after, force = opts.get('after'), opts.get('force')
     if not pats and not after:
         raise util.Abort(_('no files specified'))
 
     m = scmutil.match(repo[None], pats, opts)
     s = repo.status(match=m, clean=True)
     modified, added, deleted, clean = s[0], s[1], s[3], s[6]
 
     # warn about failure to delete explicit files/dirs
     wctx = repo[None]
     for f in m.files():
         if f in repo.dirstate or f in wctx.dirs():
             continue
         if os.path.exists(m.rel(f)):
             if os.path.isdir(m.rel(f)):
                 ui.warn(_('not removing %s: no tracked files\n') % m.rel(f))
             else:
                 ui.warn(_('not removing %s: file is untracked\n') % m.rel(f))
         # missing files will generate a warning elsewhere
         ret = 1
 
     if force:
         list = modified + deleted + clean + added
     elif after:
         list = deleted
         for f in modified + added + clean:
             ui.warn(_('not removing %s: file still exists (use -f'
                       ' to force removal)\n') % m.rel(f))
             ret = 1
     else:
         list = deleted + clean
         for f in modified:
             ui.warn(_('not removing %s: file is modified (use -f'
                       ' to force removal)\n') % m.rel(f))
             ret = 1
         for f in added:
             ui.warn(_('not removing %s: file has been marked for add'
                       ' (use forget to undo)\n') % m.rel(f))
             ret = 1
 
     for f in sorted(list):
         if ui.verbose or not m.exact(f):
             ui.status(_('removing %s\n') % m.rel(f))
 
     wlock = repo.wlock()
     try:
         if not after:
             for f in list:
                 if f in added:
                     continue # we never unlink added files on remove
                 try:
                     util.unlinkpath(repo.wjoin(f))
                 except OSError, inst:
                     if inst.errno != errno.ENOENT:
                         raise
         repo[None].forget(list)
     finally:
         wlock.release()
 
     return ret
 
 @command('rename|move|mv',
     [('A', 'after', None, _('record a rename that has already occurred')),
     ('f', 'force', None, _('forcibly copy over an existing managed file')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... SOURCE... DEST'))
 def rename(ui, repo, *pats, **opts):
     """rename files; equivalent of copy + remove
 
     Mark dest as copies of sources; mark sources for deletion. If dest
     is a directory, copies are put in that directory. If dest is a
     file, there can only be one source.
 
     By default, this command copies the contents of files as they
     exist in the working directory. If invoked with -A/--after, the
     operation is recorded, but no copying is performed.
 
     This command takes effect at the next commit. To undo a rename
     before that, see :hg:`revert`.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     wlock = repo.wlock(False)
     try:
         return cmdutil.copy(ui, repo, pats, opts, rename=True)
     finally:
         wlock.release()
 
 @command('resolve',
     [('a', 'all', None, _('select all unresolved files')),
     ('l', 'list', None, _('list state of files needing merge')),
     ('m', 'mark', None, _('mark files as resolved')),
     ('u', 'unmark', None, _('mark files as unresolved')),
     ('n', 'no-status', None, _('hide status prefix'))]
     + mergetoolopts + walkopts,
     _('[OPTION]... [FILE]...'))
 def resolve(ui, repo, *pats, **opts):
     """redo merges or set/view the merge status of files
 
     Merges with unresolved conflicts are often the result of
     non-interactive merging using the ``internal:merge`` configuration
     setting, or a command-line merge tool like ``diff3``. The resolve
     command is used to manage the files involved in a merge, after
     :hg:`merge` has been run, and before :hg:`commit` is run (i.e. the
     working directory must have two parents). See :hg:`help
     merge-tools` for information on configuring merge tools.
 
     The resolve command can be used in the following ways:
 
     - :hg:`resolve [--tool TOOL] FILE...`: attempt to re-merge the specified
       files, discarding any previous merge attempts. Re-merging is not
       performed for files already marked as resolved. Use ``--all/-a``
       to select all unresolved files. ``--tool`` can be used to specify
       the merge tool used for the given files. It overrides the HGMERGE
       environment variable and your configuration files.  Previous file
       contents are saved with a ``.orig`` suffix.
 
     - :hg:`resolve -m [FILE]`: mark a file as having been resolved
       (e.g. after having manually fixed-up the files). The default is
       to mark all unresolved files.
 
     - :hg:`resolve -u [FILE]...`: mark a file as unresolved. The
       default is to mark all resolved files.
 
     - :hg:`resolve -l`: list files which had or still have conflicts.
       In the printed list, ``U`` = unresolved and ``R`` = resolved.
 
     Note that Mercurial will not let you commit files with unresolved
     merge conflicts. You must use :hg:`resolve -m ...` before you can
     commit after a conflicting merge.
 
     Returns 0 on success, 1 if any files fail a resolve attempt.
     """
 
     all, mark, unmark, show, nostatus = \
         [opts.get(o) for o in 'all mark unmark list no_status'.split()]
 
     if (show and (mark or unmark)) or (mark and unmark):
         raise util.Abort(_("too many options specified"))
     if pats and all:
         raise util.Abort(_("can't specify --all and patterns"))
     if not (all or pats or show or mark or unmark):
         raise util.Abort(_('no files or directories specified; '
                            'use --all to remerge all files'))
 
     ms = mergemod.mergestate(repo)
     m = scmutil.match(repo[None], pats, opts)
     ret = 0
 
     for f in ms:
         if m(f):
             if show:
                 if nostatus:
                     ui.write("%s\n" % f)
                 else:
                     ui.write("%s %s\n" % (ms[f].upper(), f),
                              label='resolve.' +
                              {'u': 'unresolved', 'r': 'resolved'}[ms[f]])
             elif mark:
                 ms.mark(f, "r")
             elif unmark:
                 ms.mark(f, "u")
             else:
                 wctx = repo[None]
                 mctx = wctx.parents()[-1]
 
                 # backup pre-resolve (merge uses .orig for its own purposes)
                 a = repo.wjoin(f)
                 util.copyfile(a, a + ".resolve")
 
                 try:
                     # resolve file
                     ui.setconfig('ui', 'forcemerge', opts.get('tool', ''))
                     if ms.resolve(f, wctx, mctx):
                         ret = 1
                 finally:
                     ui.setconfig('ui', 'forcemerge', '')
                     ms.commit()
 
                 # replace filemerge's .orig file with our resolve file
                 util.rename(a + ".resolve", a + ".orig")
 
     ms.commit()
     return ret
 
 @command('revert',
     [('a', 'all', None, _('revert all changes when no arguments given')),
     ('d', 'date', '', _('tipmost revision matching date'), _('DATE')),
     ('r', 'rev', '', _('revert to the specified revision'), _('REV')),
     ('C', 'no-backup', None, _('do not save backup copies of files')),
     ] + walkopts + dryrunopts,
     _('[OPTION]... [-r REV] [NAME]...'))
 def revert(ui, repo, *pats, **opts):
     """restore files to their checkout state
 
     .. note::
 
        To check out earlier revisions, you should use :hg:`update REV`.
        To cancel an uncommitted merge (and lose your changes), use
        :hg:`update --clean .`.
 
     With no revision specified, revert the specified files or directories
     to the contents they had in the parent of the working directory.
     This restores the contents of files to an unmodified
     state and unschedules adds, removes, copies, and renames. If the
     working directory has two parents, you must explicitly specify a
     revision.
 
     Using the -r/--rev or -d/--date options, revert the given files or
     directories to their states as of a specific revision. Because
     revert does not change the working directory parents, this will
     cause these files to appear modified. This can be helpful to "back
     out" some or all of an earlier change. See :hg:`backout` for a
     related method.
 
     Modified files are saved with a .orig suffix before reverting.
     To disable these backups, use --no-backup.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success.
     """
 
     if opts.get("date"):
         if opts.get("rev"):
             raise util.Abort(_("you can't specify a revision and a date"))
         opts["rev"] = cmdutil.finddate(ui, repo, opts["date"])
 
     parent, p2 = repo.dirstate.parents()
     if not opts.get('rev') and p2 != nullid:
         # revert after merge is a trap for new users (issue2915)
         raise util.Abort(_('uncommitted merge with no revision specified'),
                          hint=_('use "hg update" or see "hg help revert"'))
 
     ctx = scmutil.revsingle(repo, opts.get('rev'))
 
     if not pats and not opts.get('all'):
         msg = _("no files or directories specified")
         if p2 != nullid:
             hint = _("uncommitted merge, use --all to discard all changes,"
                      " or 'hg update -C .' to abort the merge")
             raise util.Abort(msg, hint=hint)
         dirty = util.any(repo.status())
         node = ctx.node()
         if node != parent:
             if dirty:
                 hint = _("uncommitted changes, use --all to discard all"
                          " changes, or 'hg update %s' to update") % ctx.rev()
             else:
                 hint = _("use --all to revert all files,"
                          " or 'hg update %s' to update") % ctx.rev()
         elif dirty:
             hint = _("uncommitted changes, use --all to discard all changes")
         else:
             hint = _("use --all to revert all files")
         raise util.Abort(msg, hint=hint)
 
     return cmdutil.revert(ui, repo, ctx, (parent, p2), *pats, **opts)
 
 @command('rollback', dryrunopts +
          [('f', 'force', False, _('ignore safety measures'))])
 def rollback(ui, repo, **opts):
     """roll back the last transaction (dangerous)
 
     This command should be used with care. There is only one level of
     rollback, and there is no way to undo a rollback. It will also
     restore the dirstate at the time of the last transaction, losing
     any dirstate changes since that time. This command does not alter
     the working directory.
 
     Transactions are used to encapsulate the effects of all commands
     that create new changesets or propagate existing changesets into a
     repository.
 
     .. container:: verbose
 
       For example, the following commands are transactional, and their
       effects can be rolled back:
 
       - commit
       - import
       - pull
       - push (with this repository as the destination)
       - unbundle
 
       To avoid permanent data loss, rollback will refuse to rollback a
       commit transaction if it isn't checked out. Use --force to
       override this protection.
 
     This command is not intended for use on public repositories. Once
     changes are visible for pull by other users, rolling a transaction
     back locally is ineffective (someone else may already have pulled
     the changes). Furthermore, a race is possible with readers of the
     repository; for example an in-progress pull from the repository
     may fail if a rollback is performed.
 
     Returns 0 on success, 1 if no rollback data is available.
     """
     return repo.rollback(dryrun=opts.get('dry_run'),
                          force=opts.get('force'))
 
 @command('root', [])
 def root(ui, repo):
     """print the root (top) of the current working directory
 
     Print the root directory of the current repository.
 
     Returns 0 on success.
     """
     ui.write(repo.root + "\n")
 
 @command('^serve',
     [('A', 'accesslog', '', _('name of access log file to write to'),
      _('FILE')),
     ('d', 'daemon', None, _('run server in background')),
     ('', 'daemon-pipefds', '', _('used internally by daemon mode'), _('NUM')),
     ('E', 'errorlog', '', _('name of error log file to write to'), _('FILE')),
     # use string type, then we can check if something was passed
     ('p', 'port', '', _('port to listen on (default: 8000)'), _('PORT')),
     ('a', 'address', '', _('address to listen on (default: all interfaces)'),
      _('ADDR')),
     ('', 'prefix', '', _('prefix path to serve from (default: server root)'),
      _('PREFIX')),
     ('n', 'name', '',
      _('name to show in web pages (default: working directory)'), _('NAME')),
     ('', 'web-conf', '',
      _('name of the hgweb config file (see "hg help hgweb")'), _('FILE')),
     ('', 'webdir-conf', '', _('name of the hgweb config file (DEPRECATED)'),
      _('FILE')),
     ('', 'pid-file', '', _('name of file to write process ID to'), _('FILE')),
     ('', 'stdio', None, _('for remote clients')),
     ('', 'cmdserver', '', _('for remote clients'), _('MODE')),
     ('t', 'templates', '', _('web templates to use'), _('TEMPLATE')),
     ('', 'style', '', _('template style to use'), _('STYLE')),
     ('6', 'ipv6', None, _('use IPv6 in addition to IPv4')),
     ('', 'certificate', '', _('SSL certificate file'), _('FILE'))],
     _('[OPTION]...'))
 def serve(ui, repo, **opts):
     """start stand-alone webserver
 
     Start a local HTTP repository browser and pull server. You can use
     this for ad-hoc sharing and browsing of repositories. It is
     recommended to use a real web server to serve a repository for
     longer periods of time.
 
     Please note that the server does not implement access control.
     This means that, by default, anybody can read from the server and
     nobody can write to it by default. Set the ``web.allow_push``
     option to ``*`` to allow everybody to push to the server. You
     should use a real web server if you need to authenticate users.
 
     By default, the server logs accesses to stdout and errors to
     stderr. Use the -A/--accesslog and -E/--errorlog options to log to
     files.
 
     To have the server choose a free port number to listen on, specify
     a port number of 0; in this case, the server will print the port
     number it uses.
 
     Returns 0 on success.
     """
 
     if opts["stdio"] and opts["cmdserver"]:
         raise util.Abort(_("cannot use --stdio with --cmdserver"))
 
     def checkrepo():
         if repo is None:
             raise error.RepoError(_("there is no Mercurial repository here"
                               " (.hg not found)"))
 
     if opts["stdio"]:
         checkrepo()
         s = sshserver.sshserver(ui, repo)
         s.serve_forever()
 
     if opts["cmdserver"]:
         checkrepo()
         s = commandserver.server(ui, repo, opts["cmdserver"])
         return s.serve()
 
     # this way we can check if something was given in the command-line
     if opts.get('port'):
         opts['port'] = util.getport(opts.get('port'))
 
     baseui = repo and repo.baseui or ui
     optlist = ("name templates style address port prefix ipv6"
                " accesslog errorlog certificate encoding")
     for o in optlist.split():
         val = opts.get(o, '')
         if val in (None, ''): # should check against default options instead
             continue
         baseui.setconfig("web", o, val)
         if repo and repo.ui != baseui:
             repo.ui.setconfig("web", o, val)
 
     o = opts.get('web_conf') or opts.get('webdir_conf')
     if not o:
         if not repo:
             raise error.RepoError(_("there is no Mercurial repository"
                                     " here (.hg not found)"))
         o = repo.root
 
     app = hgweb.hgweb(o, baseui=ui)
 
     class service(object):
         def init(self):
             util.setsignalhandler()
             self.httpd = hgweb.server.create_server(ui, app)
 
             if opts['port'] and not ui.verbose:
                 return
 
             if self.httpd.prefix:
                 prefix = self.httpd.prefix.strip('/') + '/'
             else:
                 prefix = ''
 
             port = ':%d' % self.httpd.port
             if port == ':80':
                 port = ''
 
             bindaddr = self.httpd.addr
             if bindaddr == '0.0.0.0':
                 bindaddr = '*'
             elif ':' in bindaddr: # IPv6
                 bindaddr = '[%s]' % bindaddr
 
             fqaddr = self.httpd.fqaddr
             if ':' in fqaddr:
                 fqaddr = '[%s]' % fqaddr
             if opts['port']:
                 write = ui.status
             else:
                 write = ui.write
             write(_('listening at http://%s%s/%s (bound to %s:%d)\n') %
                   (fqaddr, port, prefix, bindaddr, self.httpd.port))
 
         def run(self):
             self.httpd.serve_forever()
 
     service = service()
 
     cmdutil.service(opts, initfn=service.init, runfn=service.run)
 
 @command('showconfig|debugconfig',
     [('u', 'untrusted', None, _('show untrusted configuration options'))],
     _('[-u] [NAME]...'))
 def showconfig(ui, repo, *values, **opts):
     """show combined config settings from all hgrc files
 
     With no arguments, print names and values of all config items.
 
     With one argument of the form section.name, print just the value
     of that config item.
 
     With multiple arguments, print names and values of all config
     items with matching section names.
 
     With --debug, the source (filename and line number) is printed
     for each config item.
 
     Returns 0 on success.
     """
 
     for f in scmutil.rcpath():
         ui.debug('read config from: %s\n' % f)
     untrusted = bool(opts.get('untrusted'))
     if values:
         sections = [v for v in values if '.' not in v]
         items = [v for v in values if '.' in v]
         if len(items) > 1 or items and sections:
             raise util.Abort(_('only one config item permitted'))
     for section, name, value in ui.walkconfig(untrusted=untrusted):
         value = str(value).replace('\n', '\\n')
         sectname = section + '.' + name
         if values:
             for v in values:
                 if v == section:
                     ui.debug('%s: ' %
                              ui.configsource(section, name, untrusted))
                     ui.write('%s=%s\n' % (sectname, value))
                 elif v == sectname:
                     ui.debug('%s: ' %
                              ui.configsource(section, name, untrusted))
                     ui.write(value, '\n')
         else:
             ui.debug('%s: ' %
                      ui.configsource(section, name, untrusted))
             ui.write('%s=%s\n' % (sectname, value))
 
 @command('^status|st',
     [('A', 'all', None, _('show status of all files')),
     ('m', 'modified', None, _('show only modified files')),
     ('a', 'added', None, _('show only added files')),
     ('r', 'removed', None, _('show only removed files')),
     ('d', 'deleted', None, _('show only deleted (but tracked) files')),
     ('c', 'clean', None, _('show only files without changes')),
     ('u', 'unknown', None, _('show only unknown (not tracked) files')),
     ('i', 'ignored', None, _('show only ignored files')),
     ('n', 'no-status', None, _('hide status prefix')),
     ('C', 'copies', None, _('show source of copied files')),
     ('0', 'print0', None, _('end filenames with NUL, for use with xargs')),
     ('', 'rev', [], _('show difference from revision'), _('REV')),
     ('', 'change', '', _('list the changed files of a revision'), _('REV')),
     ] + walkopts + subrepoopts,
     _('[OPTION]... [FILE]...'))
 def status(ui, repo, *pats, **opts):
     """show changed files in the working directory
 
     Show status of files in the repository. If names are given, only
     files that match are shown. Files that are clean or ignored or
     the source of a copy/move operation, are not listed unless
     -c/--clean, -i/--ignored, -C/--copies or -A/--all are given.
     Unless options described with "show only ..." are given, the
     options -mardu are used.
 
     Option -q/--quiet hides untracked (unknown and ignored) files
     unless explicitly requested with -u/--unknown or -i/--ignored.
 
     .. note::
        status may appear to disagree with diff if permissions have
        changed or a merge has occurred. The standard diff format does
        not report permission changes and diff only reports changes
        relative to one merge parent.
 
     If one revision is given, it is used as the base revision.
     If two revisions are given, the differences between them are
     shown. The --change option can also be used as a shortcut to list
     the changed files of a revision from its first parent.
 
     The codes used to show the status of files are::
 
       M = modified
       A = added
       R = removed
       C = clean
       ! = missing (deleted by non-hg command, but still tracked)
       ? = not tracked
       I = ignored
         = origin of the previous file listed as A (added)
 
     .. container:: verbose
 
       Examples:
 
       - show changes in the working directory relative to a
         changeset::
 
           hg status --rev 9353
 
       - show all changes including copies in an existing changeset::
 
           hg status --copies --change 9353
 
       - get a NUL separated list of added files, suitable for xargs::
 
           hg status -an0
 
     Returns 0 on success.
     """
 
     revs = opts.get('rev')
     change = opts.get('change')
 
     if revs and change:
         msg = _('cannot specify --rev and --change at the same time')
         raise util.Abort(msg)
     elif change:
         node2 = scmutil.revsingle(repo, change, None).node()
         node1 = repo[node2].p1().node()
     else:
         node1, node2 = scmutil.revpair(repo, revs)
 
     cwd = (pats and repo.getcwd()) or ''
     end = opts.get('print0') and '\0' or '\n'
     copy = {}
     states = 'modified added removed deleted unknown ignored clean'.split()
     show = [k for k in states if opts.get(k)]
     if opts.get('all'):
         show += ui.quiet and (states[:4] + ['clean']) or states
     if not show:
         show = ui.quiet and states[:4] or states[:5]
 
     stat = repo.status(node1, node2, scmutil.match(repo[node2], pats, opts),
                        'ignored' in show, 'clean' in show, 'unknown' in show,
                        opts.get('subrepos'))
     changestates = zip(states, 'MAR!?IC', stat)
 
     if (opts.get('all') or opts.get('copies')) and not opts.get('no_status'):
         copy = copies.pathcopies(repo[node1], repo[node2])
 
     fm = ui.formatter('status', opts)
     format = '%s %s' + end
     if opts.get('no_status'):
         format = '%.0s%s' + end
 
     for state, char, files in changestates:
         if state in show:
             label = 'status.' + state
             for f in files:
                 fm.startitem()
                 fm.write("status path", format, char,
                          repo.pathto(f, cwd), label=label)
                 if f in copy:
                     fm.write("copy", '  %s' + end, repo.pathto(copy[f], cwd),
                              label='status.copied')
     fm.end()
 
 @command('^summary|sum',
     [('', 'remote', None, _('check for push and pull'))], '[--remote]')
 def summary(ui, repo, **opts):
     """summarize working directory state
 
     This generates a brief summary of the working directory state,
     including parents, branch, commit status, and available updates.
 
     With the --remote option, this will check the default paths for
     incoming and outgoing changes. This can be time-consuming.
 
     Returns 0 on success.
     """
 
     ctx = repo[None]
     parents = ctx.parents()
     pnode = parents[0].node()
     marks = []
 
     for p in parents:
         # label with log.changeset (instead of log.parent) since this
         # shows a working directory parent *changeset*:
         ui.write(_('parent: %d:%s ') % (p.rev(), str(p)),
                  label='log.changeset changeset.%s' % p.phasestr())
         ui.write(' '.join(p.tags()), label='log.tag')
         if p.bookmarks():
             marks.extend(p.bookmarks())
         if p.rev() == -1:
             if not len(repo):
                 ui.write(_(' (empty repository)'))
             else:
                 ui.write(_(' (no revision checked out)'))
         ui.write('\n')
         if p.description():
             ui.status(' ' + p.description().splitlines()[0].strip() + '\n',
                       label='log.summary')
 
     branch = ctx.branch()
     bheads = repo.branchheads(branch)
     m = _('branch: %s\n') % branch
     if branch != 'default':
         ui.write(m, label='log.branch')
     else:
         ui.status(m, label='log.branch')
 
     if marks:
         current = repo._bookmarkcurrent
         ui.write(_('bookmarks:'), label='log.bookmark')
         if current is not None:
             try:
                 marks.remove(current)
                 ui.write(' *' + current, label='bookmarks.current')
             except ValueError:
                 # current bookmark not in parent ctx marks
                 pass
         for m in marks:
             ui.write(' ' + m, label='log.bookmark')
         ui.write('\n', label='log.bookmark')
 
     st = list(repo.status(unknown=True))[:6]
 
     c = repo.dirstate.copies()
     copied, renamed = [], []
     for d, s in c.iteritems():
         if s in st[2]:
             st[2].remove(s)
             renamed.append(d)
         else:
             copied.append(d)
         if d in st[1]:
             st[1].remove(d)
     st.insert(3, renamed)
     st.insert(4, copied)
 
     ms = mergemod.mergestate(repo)
     st.append([f for f in ms if ms[f] == 'u'])
 
     subs = [s for s in ctx.substate if ctx.sub(s).dirty()]
     st.append(subs)
 
     labels = [ui.label(_('%d modified'), 'status.modified'),
               ui.label(_('%d added'), 'status.added'),
               ui.label(_('%d removed'), 'status.removed'),
               ui.label(_('%d renamed'), 'status.copied'),
               ui.label(_('%d copied'), 'status.copied'),
               ui.label(_('%d deleted'), 'status.deleted'),
               ui.label(_('%d unknown'), 'status.unknown'),
               ui.label(_('%d ignored'), 'status.ignored'),
               ui.label(_('%d unresolved'), 'resolve.unresolved'),
               ui.label(_('%d subrepos'), 'status.modified')]
     t = []
     for s, l in zip(st, labels):
         if s:
             t.append(l % len(s))
 
     t = ', '.join(t)
     cleanworkdir = False
 
     if len(parents) > 1:
         t += _(' (merge)')
     elif branch != parents[0].branch():
         t += _(' (new branch)')
     elif (parents[0].closesbranch() and
           pnode in repo.branchheads(branch, closed=True)):
         t += _(' (head closed)')
     elif not (st[0] or st[1] or st[2] or st[3] or st[4] or st[9]):
         t += _(' (clean)')
         cleanworkdir = True
     elif pnode not in bheads:
         t += _(' (new branch head)')
 
     if cleanworkdir:
         ui.status(_('commit: %s\n') % t.strip())
     else:
         ui.write(_('commit: %s\n') % t.strip())
 
     # all ancestors of branch heads - all ancestors of parent = new csets
     new = [0] * len(repo)
     cl = repo.changelog
     for a in [cl.rev(n) for n in bheads]:
         new[a] = 1
     for a in cl.ancestors([cl.rev(n) for n in bheads]):
         new[a] = 1
     for a in [p.rev() for p in parents]:
         if a >= 0:
             new[a] = 0
     for a in cl.ancestors([p.rev() for p in parents]):
         new[a] = 0
     new = sum(new)
 
     if new == 0:
         ui.status(_('update: (current)\n'))
     elif pnode not in bheads:
         ui.write(_('update: %d new changesets (update)\n') % new)
     else:
         ui.write(_('update: %d new changesets, %d branch heads (merge)\n') %
                  (new, len(bheads)))
 
     if opts.get('remote'):
         t = []
         source, branches = hg.parseurl(ui.expandpath('default'))
         other = hg.peer(repo, {}, source)
         revs, checkout = hg.addbranchrevs(repo, other, branches,
                                           opts.get('rev'))
         ui.debug('comparing with %s\n' % util.hidepassword(source))
         repo.ui.pushbuffer()
         commoninc = discovery.findcommonincoming(repo, other)
         _common, incoming, _rheads = commoninc
         repo.ui.popbuffer()
         if incoming:
             t.append(_('1 or more incoming'))
 
         dest, branches = hg.parseurl(ui.expandpath('default-push', 'default'))
         revs, checkout = hg.addbranchrevs(repo, repo, branches, None)
         if source != dest:
             other = hg.peer(repo, {}, dest)
             commoninc = None
             ui.debug('comparing with %s\n' % util.hidepassword(dest))
         repo.ui.pushbuffer()
         outgoing = discovery.findcommonoutgoing(repo, other,
                                                 commoninc=commoninc)
         repo.ui.popbuffer()
         o = outgoing.missing
         if o:
             t.append(_('%d outgoing') % len(o))
         if 'bookmarks' in other.listkeys('namespaces'):
             lmarks = repo.listkeys('bookmarks')
             rmarks = other.listkeys('bookmarks')
             diff = set(rmarks) - set(lmarks)
             if len(diff) > 0:
                 t.append(_('%d incoming bookmarks') % len(diff))
             diff = set(lmarks) - set(rmarks)
             if len(diff) > 0:
                 t.append(_('%d outgoing bookmarks') % len(diff))
 
         if t:
             ui.write(_('remote: %s\n') % (', '.join(t)))
         else:
             ui.status(_('remote: (synced)\n'))
 
 @command('tag',
     [('f', 'force', None, _('force tag')),
     ('l', 'local', None, _('make the tag local')),
     ('r', 'rev', '', _('revision to tag'), _('REV')),
     ('', 'remove', None, _('remove a tag')),
     # -l/--local is already there, commitopts cannot be used
     ('e', 'edit', None, _('edit commit message')),
     ('m', 'message', '', _('use <text> as commit message'), _('TEXT')),
     ] + commitopts2,
     _('[-f] [-l] [-m TEXT] [-d DATE] [-u USER] [-r REV] NAME...'))
 def tag(ui, repo, name1, *names, **opts):
     """add one or more tags for the current or given revision
 
     Name a particular revision using <name>.
 
     Tags are used to name particular revisions of the repository and are
     very useful to compare different revisions, to go back to significant
     earlier versions or to mark branch points as releases, etc. Changing
     an existing tag is normally disallowed; use -f/--force to override.
 
     If no revision is given, the parent of the working directory is
     used, or tip if no revision is checked out.
 
     To facilitate version control, distribution, and merging of tags,
     they are stored as a file named ".hgtags" which is managed similarly
     to other project files and can be hand-edited if necessary. This
     also means that tagging creates a new commit. The file
     ".hg/localtags" is used for local tags (not shared among
     repositories).
 
     Tag commits are usually made at the head of a branch. If the parent
     of the working directory is not a branch head, :hg:`tag` aborts; use
     -f/--force to force the tag commit to be based on a non-head
     changeset.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Since tag names have priority over branch names during revision
     lookup, using an existing branch name as a tag name is discouraged.
 
     Returns 0 on success.
     """
     wlock = lock = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
         rev_ = "."
         names = [t.strip() for t in (name1,) + names]
         if len(names) != len(set(names)):
             raise util.Abort(_('tag names must be unique'))
         for n in names:
             scmutil.checknewlabel(repo, n, 'tag')
             if not n:
                 raise util.Abort(_('tag names cannot consist entirely of '
                                    'whitespace'))
         if opts.get('rev') and opts.get('remove'):
             raise util.Abort(_("--rev and --remove are incompatible"))
         if opts.get('rev'):
             rev_ = opts['rev']
         message = opts.get('message')
         if opts.get('remove'):
             expectedtype = opts.get('local') and 'local' or 'global'
             for n in names:
                 if not repo.tagtype(n):
                     raise util.Abort(_("tag '%s' does not exist") % n)
                 if repo.tagtype(n) != expectedtype:
                     if expectedtype == 'global':
                         raise util.Abort(_("tag '%s' is not a global tag") % n)
                     else:
                         raise util.Abort(_("tag '%s' is not a local tag") % n)
             rev_ = nullid
             if not message:
                 # we don't translate commit messages
                 message = 'Removed tag %s' % ', '.join(names)
         elif not opts.get('force'):
             for n in names:
                 if n in repo.tags():
                     raise util.Abort(_("tag '%s' already exists "
                                        "(use -f to force)") % n)
         if not opts.get('local'):
             p1, p2 = repo.dirstate.parents()
             if p2 != nullid:
                 raise util.Abort(_('uncommitted merge'))
             bheads = repo.branchheads()
             if not opts.get('force') and bheads and p1 not in bheads:
                 raise util.Abort(_('not at a branch head (use -f to force)'))
         r = scmutil.revsingle(repo, rev_).node()
 
         if not message:
             # we don't translate commit messages
             message = ('Added tag %s for changeset %s' %
                        (', '.join(names), short(r)))
 
         date = opts.get('date')
         if date:
             date = util.parsedate(date)
 
         if opts.get('edit'):
             message = ui.edit(message, ui.username())
 
         # don't allow tagging the null rev
         if (not opts.get('remove') and
             scmutil.revsingle(repo, rev_).rev() == nullrev):
             raise util.Abort(_("null revision specified"))
 
         repo.tag(names, r, message, opts.get('local'), opts.get('user'), date)
     finally:
         release(lock, wlock)
 
 @command('tags', [], '')
 def tags(ui, repo):
     """list repository tags
 
     This lists both regular and local tags. When the -v/--verbose
     switch is used, a third column "local" is printed for local tags.
 
     Returns 0 on success.
     """
 
     hexfunc = ui.debugflag and hex or short
     tagtype = ""
 
     for t, n in reversed(repo.tagslist()):
         if ui.quiet:
             ui.write("%s\n" % t, label='tags.normal')
             continue
 
         hn = hexfunc(n)
         r = "%5d:%s" % (repo.changelog.rev(n), hn)
         rev = ui.label(r, 'log.changeset changeset.%s' % repo[n].phasestr())
         spaces = " " * (30 - encoding.colwidth(t))
 
         tag = ui.label(t, 'tags.normal')
         if ui.verbose:
             if repo.tagtype(t) == 'local':
                 tagtype = " local"
                 tag = ui.label(t, 'tags.local')
             else:
                 tagtype = ""
         ui.write("%s%s %s%s\n" % (tag, spaces, rev, tagtype))
 
 @command('tip',
     [('p', 'patch', None, _('show patch')),
     ('g', 'git', None, _('use git extended diff format')),
     ] + templateopts,
     _('[-p] [-g]'))
 def tip(ui, repo, **opts):
     """show the tip revision
 
     The tip revision (usually just called the tip) is the changeset
     most recently added to the repository (and therefore the most
     recently changed head).
 
     If you have just made a commit, that commit will be the tip. If
     you have just pulled changes from another repository, the tip of
     that repository becomes the current tip. The "tip" tag is special
     and cannot be renamed or assigned to a different changeset.
 
     Returns 0 on success.
     """
     displayer = cmdutil.show_changeset(ui, repo, opts)
     displayer.show(repo[len(repo) - 1])
     displayer.close()
 
 @command('unbundle',
     [('u', 'update', None,
      _('update to new branch head if changesets were unbundled'))],
     _('[-u] FILE...'))
 def unbundle(ui, repo, fname1, *fnames, **opts):
     """apply one or more changegroup files
 
     Apply one or more compressed changegroup files generated by the
     bundle command.
 
     Returns 0 on success, 1 if an update has unresolved files.
     """
     fnames = (fname1,) + fnames
 
     lock = repo.lock()
     wc = repo['.']
     try:
         for fname in fnames:
-            f = url.open(ui, fname)
+            f = hg.openpath(ui, fname)
             gen = changegroup.readbundle(f, fname)
             modheads = repo.addchangegroup(gen, 'unbundle', 'bundle:' + fname)
     finally:
         lock.release()
     bookmarks.updatecurrentbookmark(repo, wc.node(), wc.branch())
     return postincoming(ui, repo, modheads, opts.get('update'), None)
 
 @command('^update|up|checkout|co',
     [('C', 'clean', None, _('discard uncommitted changes (no backup)')),
     ('c', 'check', None,
      _('update across branches if no uncommitted changes')),
     ('d', 'date', '', _('tipmost revision matching date'), _('DATE')),
     ('r', 'rev', '', _('revision'), _('REV'))],
     _('[-c] [-C] [-d DATE] [[-r] REV]'))
 def update(ui, repo, node=None, rev=None, clean=False, date=None, check=False):
     """update working directory (or switch revisions)
 
     Update the repository's working directory to the specified
     changeset. If no changeset is specified, update to the tip of the
     current named branch and move the current bookmark (see :hg:`help
     bookmarks`).
 
     Update sets the working directory's parent revision to the specified
     changeset (see :hg:`help parents`).
 
     If the changeset is not a descendant or ancestor of the working
     directory's parent, the update is aborted. With the -c/--check
     option, the working directory is checked for uncommitted changes; if
     none are found, the working directory is updated to the specified
     changeset.
 
     .. container:: verbose
 
       The following rules apply when the working directory contains
       uncommitted changes:
 
       1. If neither -c/--check nor -C/--clean is specified, and if
          the requested changeset is an ancestor or descendant of
          the working directory's parent, the uncommitted changes
          are merged into the requested changeset and the merged
          result is left uncommitted. If the requested changeset is
          not an ancestor or descendant (that is, it is on another
          branch), the update is aborted and the uncommitted changes
          are preserved.
 
       2. With the -c/--check option, the update is aborted and the
          uncommitted changes are preserved.
 
       3. With the -C/--clean option, uncommitted changes are discarded and
          the working directory is updated to the requested changeset.
 
     To cancel an uncommitted merge (and lose your changes), use
     :hg:`update --clean .`.
 
     Use null as the changeset to remove the working directory (like
     :hg:`clone -U`).
 
     If you want to revert just one file to an older revision, use
     :hg:`revert [-r REV] NAME`.
 
     See :hg:`help dates` for a list of formats valid for -d/--date.
 
     Returns 0 on success, 1 if there are unresolved files.
     """
     if rev and node:
         raise util.Abort(_("please specify just one revision"))
 
     if rev is None or rev == '':
         rev = node
 
     # with no argument, we also move the current bookmark, if any
     movemarkfrom = None
     if rev is None:
         movemarkfrom = repo['.'].node()
 
     # if we defined a bookmark, we have to remember the original bookmark name
     brev = rev
     rev = scmutil.revsingle(repo, rev, rev).rev()
 
     if check and clean:
         raise util.Abort(_("cannot specify both -c/--check and -C/--clean"))
 
     if date:
         if rev is not None:
             raise util.Abort(_("you can't specify a revision and a date"))
         rev = cmdutil.finddate(ui, repo, date)
 
     if check:
         c = repo[None]
         if c.dirty(merge=False, branch=False, missing=True):
             raise util.Abort(_("uncommitted local changes"))
         if rev is None:
             rev = repo[repo[None].branch()].rev()
         mergemod._checkunknown(repo, repo[None], repo[rev])
 
     if clean:
         ret = hg.clean(repo, rev)
     else:
         ret = hg.update(repo, rev)
 
     if not ret and movemarkfrom:
         if bookmarks.update(repo, [movemarkfrom], repo['.'].node()):
             ui.status(_("updating bookmark %s\n") % repo._bookmarkcurrent)
     elif brev in repo._bookmarks:
         bookmarks.setcurrent(repo, brev)
     elif brev:
         bookmarks.unsetcurrent(repo)
 
     return ret
 
 @command('verify', [])
 def verify(ui, repo):
     """verify the integrity of the repository
 
     Verify the integrity of the current repository.
 
     This will perform an extensive check of the repository's
     integrity, validating the hashes and checksums of each entry in
     the changelog, manifest, and tracked files, as well as the
     integrity of their crosslinks and indices.
 
     Please see http://mercurial.selenic.com/wiki/RepositoryCorruption
     for more information about recovery from corruption of the
     repository.
 
     Returns 0 on success, 1 if errors are encountered.
     """
     return hg.verify(repo)
 
 @command('version', [])
 def version_(ui):
     """output version and copyright information"""
     ui.write(_("Mercurial Distributed SCM (version %s)\n")
              % util.version())
     ui.status(_(
         "(see http://mercurial.selenic.com for more information)\n"
         "\nCopyright (C) 2005-2012 Matt Mackall and others\n"
         "This is free software; see the source for copying conditions. "
         "There is NO\nwarranty; "
         "not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
     ))
 
 norepo = ("clone init version help debugcommands debugcomplete"
           " debugdate debuginstall debugfsinfo debugpushkey debugwireargs"
           " debugknown debuggetbundle debugbundle")
 optionalrepo = ("identify paths serve showconfig debugancestor debugdag"
                 " debugdata debugindex debugindexdot debugrevlog")
 inferrepo = ("add addremove annotate cat commit diff grep forget log parents"
              " remove resolve status debugwalk")

mercurial/hg.py

@@ -1,627 +1,634 b''
 # hg.py - repository classes for mercurial
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 # Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from i18n import _
 from lock import release
 from node import hex, nullid
 import localrepo, bundlerepo, httppeer, sshpeer, statichttprepo, bookmarks
-import lock, util, extensions, error, node, scmutil, phases
+import lock, util, extensions, error, node, scmutil, phases, url
 import cmdutil, discovery
 import merge as mergemod
 import verify as verifymod
 import errno, os, shutil
 
 def _local(path):
     path = util.expandpath(util.urllocalpath(path))
     return (os.path.isfile(path) and bundlerepo or localrepo)
 
 def addbranchrevs(lrepo, other, branches, revs):
     peer = other.peer() # a courtesy to callers using a localrepo for other
     hashbranch, branches = branches
     if not hashbranch and not branches:
         return revs or None, revs and revs[0] or None
     revs = revs and list(revs) or []
     if not peer.capable('branchmap'):
         if branches:
             raise util.Abort(_("remote branch lookup not supported"))
         revs.append(hashbranch)
         return revs, revs[0]
     branchmap = peer.branchmap()
 
     def primary(branch):
         if branch == '.':
             if not lrepo:
                 raise util.Abort(_("dirstate branch not accessible"))
             branch = lrepo.dirstate.branch()
         if branch in branchmap:
             revs.extend(node.hex(r) for r in reversed(branchmap[branch]))
             return True
         else:
             return False
 
     for branch in branches:
         if not primary(branch):
             raise error.RepoLookupError(_("unknown branch '%s'") % branch)
     if hashbranch:
         if not primary(hashbranch):
             revs.append(hashbranch)
     return revs, revs[0]
 
 def parseurl(path, branches=None):
     '''parse url#branch, returning (url, (branch, branches))'''
 
     u = util.url(path)
     branch = None
     if u.fragment:
         branch = u.fragment
         u.fragment = None
     return str(u), (branch, branches or [])
 
 schemes = {
     'bundle': bundlerepo,
     'file': _local,
     'http': httppeer,
     'https': httppeer,
     'ssh': sshpeer,
     'static-http': statichttprepo,
 }
 
 def _peerlookup(path):
     u = util.url(path)
     scheme = u.scheme or 'file'
     thing = schemes.get(scheme) or schemes['file']
     try:
         return thing(path)
     except TypeError:
         return thing
 
 def islocal(repo):
     '''return true if repo or path is local'''
     if isinstance(repo, str):
         try:
             return _peerlookup(repo).islocal(repo)
         except AttributeError:
             return False
     return repo.local()
 
+def openpath(ui, path):
+    '''open path with open if local, url.open if remote'''
+    if islocal(path):
+        return open(util.urllocalpath(path))
+    else:
+        return url.open(ui, path)
+
 def _peerorrepo(ui, path, create=False):
     """return a repository object for the specified path"""
     obj = _peerlookup(path).instance(ui, path, create)
     ui = getattr(obj, "ui", ui)
     for name, module in extensions.extensions():
         hook = getattr(module, 'reposetup', None)
         if hook:
             hook(ui, obj)
     return obj
 
 def repository(ui, path='', create=False):
     """return a repository object for the specified path"""
     peer = _peerorrepo(ui, path, create)
     repo = peer.local()
     if not repo:
         raise util.Abort(_("repository '%s' is not local") %
                          (path or peer.url()))
     return repo
 
 def peer(uiorrepo, opts, path, create=False):
     '''return a repository peer for the specified path'''
     rui = remoteui(uiorrepo, opts)
     return _peerorrepo(rui, path, create).peer()
 
 def defaultdest(source):
     '''return default destination of clone if none is given'''
     return os.path.basename(os.path.normpath(util.url(source).path))
 
 def share(ui, source, dest=None, update=True):
     '''create a shared repository'''
 
     if not islocal(source):
         raise util.Abort(_('can only share local repositories'))
 
     if not dest:
         dest = defaultdest(source)
     else:
         dest = ui.expandpath(dest)
 
     if isinstance(source, str):
         origsource = ui.expandpath(source)
         source, branches = parseurl(origsource)
         srcrepo = repository(ui, source)
         rev, checkout = addbranchrevs(srcrepo, srcrepo, branches, None)
     else:
         srcrepo = source.local()
         origsource = source = srcrepo.url()
         checkout = None
 
     sharedpath = srcrepo.sharedpath # if our source is already sharing
 
     root = os.path.realpath(dest)
     roothg = os.path.join(root, '.hg')
 
     if os.path.exists(roothg):
         raise util.Abort(_('destination already exists'))
 
     if not os.path.isdir(root):
         os.mkdir(root)
     util.makedir(roothg, notindexed=True)
 
     requirements = ''
     try:
         requirements = srcrepo.opener.read('requires')
     except IOError, inst:
         if inst.errno != errno.ENOENT:
             raise
 
     requirements += 'shared\n'
     util.writefile(os.path.join(roothg, 'requires'), requirements)
     util.writefile(os.path.join(roothg, 'sharedpath'), sharedpath)
 
     r = repository(ui, root)
 
     default = srcrepo.ui.config('paths', 'default')
     if default:
         fp = r.opener("hgrc", "w", text=True)
         fp.write("[paths]\n")
         fp.write("default = %s\n" % default)
         fp.close()
 
     if update:
         r.ui.status(_("updating working directory\n"))
         if update is not True:
             checkout = update
         for test in (checkout, 'default', 'tip'):
             if test is None:
                 continue
             try:
                 uprev = r.lookup(test)
                 break
             except error.RepoLookupError:
                 continue
         _update(r, uprev)
 
 def copystore(ui, srcrepo, destpath):
     '''copy files from store of srcrepo in destpath
 
     returns destlock
     '''
     destlock = None
     try:
         hardlink = None
         num = 0
         srcpublishing = srcrepo.ui.configbool('phases', 'publish', True)
         for f in srcrepo.store.copylist():
             if srcpublishing and f.endswith('phaseroots'):
                 continue
             src = os.path.join(srcrepo.sharedpath, f)
             dst = os.path.join(destpath, f)
             dstbase = os.path.dirname(dst)
             if dstbase and not os.path.exists(dstbase):
                 os.mkdir(dstbase)
             if os.path.exists(src):
                 if dst.endswith('data'):
                     # lock to avoid premature writing to the target
                     destlock = lock.lock(os.path.join(dstbase, "lock"))
                 hardlink, n = util.copyfiles(src, dst, hardlink)
                 num += n
         if hardlink:
             ui.debug("linked %d files\n" % num)
         else:
             ui.debug("copied %d files\n" % num)
         return destlock
     except: # re-raises
         release(destlock)
         raise
 
 def clone(ui, peeropts, source, dest=None, pull=False, rev=None,
           update=True, stream=False, branch=None):
     """Make a copy of an existing repository.
 
     Create a copy of an existing repository in a new directory.  The
     source and destination are URLs, as passed to the repository
     function.  Returns a pair of repository peers, the source and
     newly created destination.
 
     The location of the source is added to the new repository's
     .hg/hgrc file, as the default to be used for future pulls and
     pushes.
 
     If an exception is raised, the partly cloned/updated destination
     repository will be deleted.
 
     Arguments:
 
     source: repository object or URL
 
     dest: URL of destination repository to create (defaults to base
     name of source repository)
 
     pull: always pull from source repository, even in local case
 
     stream: stream raw data uncompressed from repository (fast over
     LAN, slow over WAN)
 
     rev: revision to clone up to (implies pull=True)
 
     update: update working directory after clone completes, if
     destination is local repository (True means update to default rev,
     anything else is treated as a revision)
 
     branch: branches to clone
     """
 
     if isinstance(source, str):
         origsource = ui.expandpath(source)
         source, branch = parseurl(origsource, branch)
         srcpeer = peer(ui, peeropts, source)
     else:
         srcpeer = source.peer() # in case we were called with a localrepo
         branch = (None, branch or [])
         origsource = source = srcpeer.url()
     rev, checkout = addbranchrevs(srcpeer, srcpeer, branch, rev)
 
     if dest is None:
         dest = defaultdest(source)
         ui.status(_("destination directory: %s\n") % dest)
     else:
         dest = ui.expandpath(dest)
 
     dest = util.urllocalpath(dest)
     source = util.urllocalpath(source)
 
     if not dest:
         raise util.Abort(_("empty destination path is not valid"))
     if os.path.exists(dest):
         if not os.path.isdir(dest):
             raise util.Abort(_("destination '%s' already exists") % dest)
         elif os.listdir(dest):
             raise util.Abort(_("destination '%s' is not empty") % dest)
 
     class DirCleanup(object):
         def __init__(self, dir_):
             self.rmtree = shutil.rmtree
             self.dir_ = dir_
         def close(self):
             self.dir_ = None
         def cleanup(self):
             if self.dir_:
                 self.rmtree(self.dir_, True)
 
     srclock = destlock = dircleanup = None
     srcrepo = srcpeer.local()
     try:
         abspath = origsource
         if islocal(origsource):
             abspath = os.path.abspath(util.urllocalpath(origsource))
 
         if islocal(dest):
             dircleanup = DirCleanup(dest)
 
         copy = False
         if (srcrepo and srcrepo.cancopy() and islocal(dest)
             and not phases.hassecret(srcrepo)):
             copy = not pull and not rev
 
         if copy:
             try:
                 # we use a lock here because if we race with commit, we
                 # can end up with extra data in the cloned revlogs that's
                 # not pointed to by changesets, thus causing verify to
                 # fail
                 srclock = srcrepo.lock(wait=False)
             except error.LockError:
                 copy = False
 
         if copy:
             srcrepo.hook('preoutgoing', throw=True, source='clone')
             hgdir = os.path.realpath(os.path.join(dest, ".hg"))
             if not os.path.exists(dest):
                 os.mkdir(dest)
             else:
                 # only clean up directories we create ourselves
                 dircleanup.dir_ = hgdir
             try:
                 destpath = hgdir
                 util.makedir(destpath, notindexed=True)
             except OSError, inst:
                 if inst.errno == errno.EEXIST:
                     dircleanup.close()
                     raise util.Abort(_("destination '%s' already exists")
                                      % dest)
                 raise
 
             destlock = copystore(ui, srcrepo, destpath)
 
             # Recomputing branch cache might be slow on big repos,
             # so just copy it
             dstcachedir = os.path.join(destpath, 'cache')
             srcbranchcache = srcrepo.sjoin('cache/branchheads')
             dstbranchcache = os.path.join(dstcachedir, 'branchheads')
             if os.path.exists(srcbranchcache):
                 if not os.path.exists(dstcachedir):
                     os.mkdir(dstcachedir)
                 util.copyfile(srcbranchcache, dstbranchcache)
 
             # we need to re-init the repo after manually copying the data
             # into it
             destpeer = peer(srcrepo, peeropts, dest)
             srcrepo.hook('outgoing', source='clone',
                           node=node.hex(node.nullid))
         else:
             try:
                 destpeer = peer(srcrepo or ui, peeropts, dest, create=True)
                                 # only pass ui when no srcrepo
             except OSError, inst:
                 if inst.errno == errno.EEXIST:
                     dircleanup.close()
                     raise util.Abort(_("destination '%s' already exists")
                                      % dest)
                 raise
 
             revs = None
             if rev:
                 if not srcpeer.capable('lookup'):
                     raise util.Abort(_("src repository does not support "
                                        "revision lookup and so doesn't "
                                        "support clone by revision"))
                 revs = [srcpeer.lookup(r) for r in rev]
                 checkout = revs[0]
             if destpeer.local():
                 destpeer.local().clone(srcpeer, heads=revs, stream=stream)
             elif srcrepo:
                 srcrepo.push(destpeer, revs=revs)
             else:
                 raise util.Abort(_("clone from remote to remote not supported"))
 
         if dircleanup:
             dircleanup.close()
 
         # clone all bookmarks except divergent ones
         destrepo = destpeer.local()
         if destrepo and srcpeer.capable("pushkey"):
             rb = srcpeer.listkeys('bookmarks')
             for k, n in rb.iteritems():
                 try:
                     m = destrepo.lookup(n)
                     destrepo._bookmarks[k] = m
                 except error.RepoLookupError:
                     pass
             if rb:
                 bookmarks.write(destrepo)
         elif srcrepo and destpeer.capable("pushkey"):
             for k, n in srcrepo._bookmarks.iteritems():
                 destpeer.pushkey('bookmarks', k, '', hex(n))
 
         if destrepo:
             fp = destrepo.opener("hgrc", "w", text=True)
             fp.write("[paths]\n")
             u = util.url(abspath)
             u.passwd = None
             defaulturl = str(u)
             fp.write("default = %s\n" % defaulturl)
             fp.close()
 
             destrepo.ui.setconfig('paths', 'default', defaulturl)
 
             if update:
                 if update is not True:
                     checkout = srcpeer.lookup(update)
                 uprev = None
                 status = None
                 if checkout is not None:
                     try:
                         uprev = destrepo.lookup(checkout)
                     except error.RepoLookupError:
                         pass
                 if uprev is None:
                     try:
                         uprev = destrepo._bookmarks['@']
                         update = '@'
                         bn = destrepo[uprev].branch()
                         if bn == 'default':
                             status = _("updating to bookmark @\n")
                         else:
                             status = _("updating to bookmark @ on branch %s\n"
                                        % bn)
                     except KeyError:
                         try:
                             uprev = destrepo.branchtip('default')
                         except error.RepoLookupError:
                             uprev = destrepo.lookup('tip')
                 if not status:
                     bn = destrepo[uprev].branch()
                     status = _("updating to branch %s\n") % bn
                 destrepo.ui.status(status)
                 _update(destrepo, uprev)
                 if update in destrepo._bookmarks:
                     bookmarks.setcurrent(destrepo, update)
 
         return srcpeer, destpeer
     finally:
         release(srclock, destlock)
         if dircleanup is not None:
             dircleanup.cleanup()
         if srcpeer is not None:
             srcpeer.close()
 
 def _showstats(repo, stats):
     repo.ui.status(_("%d files updated, %d files merged, "
                      "%d files removed, %d files unresolved\n") % stats)
 
 def update(repo, node):
     """update the working directory to node, merging linear changes"""
     stats = mergemod.update(repo, node, False, False, None)
     _showstats(repo, stats)
     if stats[3]:
         repo.ui.status(_("use 'hg resolve' to retry unresolved file merges\n"))
     return stats[3] > 0
 
 # naming conflict in clone()
 _update = update
 
 def clean(repo, node, show_stats=True):
     """forcibly switch the working directory to node, clobbering changes"""
     stats = mergemod.update(repo, node, False, True, None)
     if show_stats:
         _showstats(repo, stats)
     return stats[3] > 0
 
 def merge(repo, node, force=None, remind=True):
     """Branch merge with node, resolving changes. Return true if any
     unresolved conflicts."""
     stats = mergemod.update(repo, node, True, force, False)
     _showstats(repo, stats)
     if stats[3]:
         repo.ui.status(_("use 'hg resolve' to retry unresolved file merges "
                          "or 'hg update -C .' to abandon\n"))
     elif remind:
         repo.ui.status(_("(branch merge, don't forget to commit)\n"))
     return stats[3] > 0
 
 def _incoming(displaychlist, subreporecurse, ui, repo, source,
         opts, buffered=False):
     """
     Helper for incoming / gincoming.
     displaychlist gets called with
         (remoterepo, incomingchangesetlist, displayer) parameters,
     and is supposed to contain only code that can't be unified.
     """
     source, branches = parseurl(ui.expandpath(source), opts.get('branch'))
     other = peer(repo, opts, source)
     ui.status(_('comparing with %s\n') % util.hidepassword(source))
     revs, checkout = addbranchrevs(repo, other, branches, opts.get('rev'))
 
     if revs:
         revs = [other.lookup(rev) for rev in revs]
     other, chlist, cleanupfn = bundlerepo.getremotechanges(ui, repo, other,
                                 revs, opts["bundle"], opts["force"])
     try:
         if not chlist:
             ui.status(_("no changes found\n"))
             return subreporecurse()
 
         displayer = cmdutil.show_changeset(ui, other, opts, buffered)
 
         # XXX once graphlog extension makes it into core,
         # should be replaced by a if graph/else
         displaychlist(other, chlist, displayer)
 
         displayer.close()
     finally:
         cleanupfn()
     subreporecurse()
     return 0 # exit code is zero since we found incoming changes
 
 def incoming(ui, repo, source, opts):
     def subreporecurse():
         ret = 1
         if opts.get('subrepos'):
             ctx = repo[None]
             for subpath in sorted(ctx.substate):
                 sub = ctx.sub(subpath)
                 ret = min(ret, sub.incoming(ui, source, opts))
         return ret
 
     def display(other, chlist, displayer):
         limit = cmdutil.loglimit(opts)
         if opts.get('newest_first'):
             chlist.reverse()
         count = 0
         for n in chlist:
             if limit is not None and count >= limit:
                 break
             parents = [p for p in other.changelog.parents(n) if p != nullid]
             if opts.get('no_merges') and len(parents) == 2:
                 continue
             count += 1
             displayer.show(other[n])
     return _incoming(display, subreporecurse, ui, repo, source, opts)
 
 def _outgoing(ui, repo, dest, opts):
     dest = ui.expandpath(dest or 'default-push', dest or 'default')
     dest, branches = parseurl(dest, opts.get('branch'))
     ui.status(_('comparing with %s\n') % util.hidepassword(dest))
     revs, checkout = addbranchrevs(repo, repo, branches, opts.get('rev'))
     if revs:
         revs = [repo.lookup(rev) for rev in scmutil.revrange(repo, revs)]
 
     other = peer(repo, opts, dest)
     outgoing = discovery.findcommonoutgoing(repo, other, revs,
                                             force=opts.get('force'))
     o = outgoing.missing
     if not o:
         scmutil.nochangesfound(repo.ui, repo, outgoing.excluded)
         return None
     return o
 
 def outgoing(ui, repo, dest, opts):
     def recurse():
         ret = 1
         if opts.get('subrepos'):
             ctx = repo[None]
             for subpath in sorted(ctx.substate):
                 sub = ctx.sub(subpath)
                 ret = min(ret, sub.outgoing(ui, dest, opts))
         return ret
 
     limit = cmdutil.loglimit(opts)
     o = _outgoing(ui, repo, dest, opts)
     if o is None:
         return recurse()
 
     if opts.get('newest_first'):
         o.reverse()
     displayer = cmdutil.show_changeset(ui, repo, opts)
     count = 0
     for n in o:
         if limit is not None and count >= limit:
             break
         parents = [p for p in repo.changelog.parents(n) if p != nullid]
         if opts.get('no_merges') and len(parents) == 2:
             continue
         count += 1
         displayer.show(repo[n])
     displayer.close()
     recurse()
     return 0 # exit code is zero since we found outgoing changes
 
 def revert(repo, node, choose):
     """revert changes to revision in node without updating dirstate"""
     return mergemod.update(repo, node, False, True, choose)[3] > 0
 
 def verify(repo):
     """verify the consistency of a repository"""
     return verifymod.verify(repo)
 
 def remoteui(src, opts):
     'build a remote ui from ui or repo and opts'
     if util.safehasattr(src, 'baseui'): # looks like a repository
         dst = src.baseui.copy() # drop repo-specific config
         src = src.ui # copy target options from repo
     else: # assume it's a global ui object
         dst = src.copy() # keep all global options
 
     # copy ssh-specific options
     for o in 'ssh', 'remotecmd':
         v = opts.get(o) or src.config('ui', o)
         if v:
             dst.setconfig("ui", o, v)
 
     # copy bundle-specific options
     r = src.config('bundle', 'mainreporoot')
     if r:
         dst.setconfig('bundle', 'mainreporoot', r)
 
     # copy selected local settings to the remote ui
     for sect in ('auth', 'hostfingerprints', 'http_proxy'):
         for key, val in src.configitems(sect):
             dst.setconfig(sect, key, val)
     v = src.config('web', 'cacerts')
     if v:
         dst.setconfig('web', 'cacerts', util.expandpath(v))
 
     return dst