amend: add noise in extra to avoid creating obsolescence cycle (issue3664)

Obsolescence cycle are bad and should be avoided as much as possible. The
current amend implemented touch changeset meta data as few as possible. This
make is easy for amend to result in the same node than a precursors. We add some
deterministic noise in extra to avoid this. In practice, the hex of the amended
changeset is stored in 'amend_source' extra key.

mercurial/cmdutil.py

@@ -1,1981 +1,1998 b''
 # cmdutil.py - help for command processing in mercurial
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from node import hex, nullid, nullrev, short
 from i18n import _
 import os, sys, errno, re, tempfile
 import util, scmutil, templater, patch, error, templatekw, revlog, copies
 import match as matchmod
 import subrepo, context, repair, bookmarks, graphmod, revset, phases, obsolete
+import changelog
 import lock as lockmod
 
 def parsealiases(cmd):
     return cmd.lstrip("^").split("|")
 
 def findpossible(cmd, table, strict=False):
     """
     Return cmd -> (aliases, command table entry)
     for each matching command.
     Return debug commands (or their aliases) only if no normal command matches.
     """
     choice = {}
     debugchoice = {}
 
     if cmd in table:
         # short-circuit exact matches, "log" alias beats "^log|history"
         keys = [cmd]
     else:
         keys = table.keys()
 
     for e in keys:
         aliases = parsealiases(e)
         found = None
         if cmd in aliases:
             found = cmd
         elif not strict:
             for a in aliases:
                 if a.startswith(cmd):
                     found = a
                     break
         if found is not None:
             if aliases[0].startswith("debug") or found.startswith("debug"):
                 debugchoice[found] = (aliases, table[e])
             else:
                 choice[found] = (aliases, table[e])
 
     if not choice and debugchoice:
         choice = debugchoice
 
     return choice
 
 def findcmd(cmd, table, strict=True):
     """Return (aliases, command table entry) for command string."""
     choice = findpossible(cmd, table, strict)
 
     if cmd in choice:
         return choice[cmd]
 
     if len(choice) > 1:
         clist = choice.keys()
         clist.sort()
         raise error.AmbiguousCommand(cmd, clist)
 
     if choice:
         return choice.values()[0]
 
     raise error.UnknownCommand(cmd)
 
 def findrepo(p):
     while not os.path.isdir(os.path.join(p, ".hg")):
         oldp, p = p, os.path.dirname(p)
         if p == oldp:
             return None
 
     return p
 
 def bailifchanged(repo):
     if repo.dirstate.p2() != nullid:
         raise util.Abort(_('outstanding uncommitted merge'))
     modified, added, removed, deleted = repo.status()[:4]
     if modified or added or removed or deleted:
         raise util.Abort(_("outstanding uncommitted changes"))
     ctx = repo[None]
     for s in ctx.substate:
         if ctx.sub(s).dirty():
             raise util.Abort(_("uncommitted changes in subrepo %s") % s)
 
 def logmessage(ui, opts):
     """ get the log message according to -m and -l option """
     message = opts.get('message')
     logfile = opts.get('logfile')
 
     if message and logfile:
         raise util.Abort(_('options --message and --logfile are mutually '
                            'exclusive'))
     if not message and logfile:
         try:
             if logfile == '-':
                 message = ui.fin.read()
             else:
                 message = '\n'.join(util.readfile(logfile).splitlines())
         except IOError, inst:
             raise util.Abort(_("can't read commit message '%s': %s") %
                              (logfile, inst.strerror))
     return message
 
 def loglimit(opts):
     """get the log limit according to option -l/--limit"""
     limit = opts.get('limit')
     if limit:
         try:
             limit = int(limit)
         except ValueError:
             raise util.Abort(_('limit must be a positive integer'))
         if limit <= 0:
             raise util.Abort(_('limit must be positive'))
     else:
         limit = None
     return limit
 
 def makefilename(repo, pat, node, desc=None,
                   total=None, seqno=None, revwidth=None, pathname=None):
     node_expander = {
         'H': lambda: hex(node),
         'R': lambda: str(repo.changelog.rev(node)),
         'h': lambda: short(node),
         'm': lambda: re.sub('[^\w]', '_', str(desc))
         }
     expander = {
         '%': lambda: '%',
         'b': lambda: os.path.basename(repo.root),
         }
 
     try:
         if node:
             expander.update(node_expander)
         if node:
             expander['r'] = (lambda:
                     str(repo.changelog.rev(node)).zfill(revwidth or 0))
         if total is not None:
             expander['N'] = lambda: str(total)
         if seqno is not None:
             expander['n'] = lambda: str(seqno)
         if total is not None and seqno is not None:
             expander['n'] = lambda: str(seqno).zfill(len(str(total)))
         if pathname is not None:
             expander['s'] = lambda: os.path.basename(pathname)
             expander['d'] = lambda: os.path.dirname(pathname) or '.'
             expander['p'] = lambda: pathname
 
         newname = []
         patlen = len(pat)
         i = 0
         while i < patlen:
             c = pat[i]
             if c == '%':
                 i += 1
                 c = pat[i]
                 c = expander[c]()
             newname.append(c)
             i += 1
         return ''.join(newname)
     except KeyError, inst:
         raise util.Abort(_("invalid format spec '%%%s' in output filename") %
                          inst.args[0])
 
 def makefileobj(repo, pat, node=None, desc=None, total=None,
                 seqno=None, revwidth=None, mode='wb', pathname=None):
 
     writable = mode not in ('r', 'rb')
 
     if not pat or pat == '-':
         fp = writable and repo.ui.fout or repo.ui.fin
         if util.safehasattr(fp, 'fileno'):
             return os.fdopen(os.dup(fp.fileno()), mode)
         else:
             # if this fp can't be duped properly, return
             # a dummy object that can be closed
             class wrappedfileobj(object):
                 noop = lambda x: None
                 def __init__(self, f):
                     self.f = f
                 def __getattr__(self, attr):
                     if attr == 'close':
                         return self.noop
                     else:
                         return getattr(self.f, attr)
 
             return wrappedfileobj(fp)
     if util.safehasattr(pat, 'write') and writable:
         return pat
     if util.safehasattr(pat, 'read') and 'r' in mode:
         return pat
     return open(makefilename(repo, pat, node, desc, total, seqno, revwidth,
                               pathname),
                 mode)
 
 def openrevlog(repo, cmd, file_, opts):
     """opens the changelog, manifest, a filelog or a given revlog"""
     cl = opts['changelog']
     mf = opts['manifest']
     msg = None
     if cl and mf:
         msg = _('cannot specify --changelog and --manifest at the same time')
     elif cl or mf:
         if file_:
             msg = _('cannot specify filename with --changelog or --manifest')
         elif not repo:
             msg = _('cannot specify --changelog or --manifest '
                     'without a repository')
     if msg:
         raise util.Abort(msg)
 
     r = None
     if repo:
         if cl:
             r = repo.changelog
         elif mf:
             r = repo.manifest
         elif file_:
             filelog = repo.file(file_)
             if len(filelog):
                 r = filelog
     if not r:
         if not file_:
             raise error.CommandError(cmd, _('invalid arguments'))
         if not os.path.isfile(file_):
             raise util.Abort(_("revlog '%s' not found") % file_)
         r = revlog.revlog(scmutil.opener(os.getcwd(), audit=False),
                           file_[:-2] + ".i")
     return r
 
 def copy(ui, repo, pats, opts, rename=False):
     # called with the repo lock held
     #
     # hgsep => pathname that uses "/" to separate directories
     # ossep => pathname that uses os.sep to separate directories
     cwd = repo.getcwd()
     targets = {}
     after = opts.get("after")
     dryrun = opts.get("dry_run")
     wctx = repo[None]
 
     def walkpat(pat):
         srcs = []
         badstates = after and '?' or '?r'
         m = scmutil.match(repo[None], [pat], opts, globbed=True)
         for abs in repo.walk(m):
             state = repo.dirstate[abs]
             rel = m.rel(abs)
             exact = m.exact(abs)
             if state in badstates:
                 if exact and state == '?':
                     ui.warn(_('%s: not copying - file is not managed\n') % rel)
                 if exact and state == 'r':
                     ui.warn(_('%s: not copying - file has been marked for'
                               ' remove\n') % rel)
                 continue
             # abs: hgsep
             # rel: ossep
             srcs.append((abs, rel, exact))
         return srcs
 
     # abssrc: hgsep
     # relsrc: ossep
     # otarget: ossep
     def copyfile(abssrc, relsrc, otarget, exact):
         abstarget = scmutil.canonpath(repo.root, cwd, otarget)
         if '/' in abstarget:
             # We cannot normalize abstarget itself, this would prevent
             # case only renames, like a => A.
             abspath, absname = abstarget.rsplit('/', 1)
             abstarget = repo.dirstate.normalize(abspath) + '/' + absname
         reltarget = repo.pathto(abstarget, cwd)
         target = repo.wjoin(abstarget)
         src = repo.wjoin(abssrc)
         state = repo.dirstate[abstarget]
 
         scmutil.checkportable(ui, abstarget)
 
         # check for collisions
         prevsrc = targets.get(abstarget)
         if prevsrc is not None:
             ui.warn(_('%s: not overwriting - %s collides with %s\n') %
                     (reltarget, repo.pathto(abssrc, cwd),
                      repo.pathto(prevsrc, cwd)))
             return
 
         # check for overwrites
         exists = os.path.lexists(target)
         samefile = False
         if exists and abssrc != abstarget:
             if (repo.dirstate.normalize(abssrc) ==
                 repo.dirstate.normalize(abstarget)):
                 if not rename:
                     ui.warn(_("%s: can't copy - same file\n") % reltarget)
                     return
                 exists = False
                 samefile = True
 
         if not after and exists or after and state in 'mn':
             if not opts['force']:
                 ui.warn(_('%s: not overwriting - file exists\n') %
                         reltarget)
                 return
 
         if after:
             if not exists:
                 if rename:
                     ui.warn(_('%s: not recording move - %s does not exist\n') %
                             (relsrc, reltarget))
                 else:
                     ui.warn(_('%s: not recording copy - %s does not exist\n') %
                             (relsrc, reltarget))
                 return
         elif not dryrun:
             try:
                 if exists:
                     os.unlink(target)
                 targetdir = os.path.dirname(target) or '.'
                 if not os.path.isdir(targetdir):
                     os.makedirs(targetdir)
                 if samefile:
                     tmp = target + "~hgrename"
                     os.rename(src, tmp)
                     os.rename(tmp, target)
                 else:
                     util.copyfile(src, target)
                 srcexists = True
             except IOError, inst:
                 if inst.errno == errno.ENOENT:
                     ui.warn(_('%s: deleted in working copy\n') % relsrc)
                     srcexists = False
                 else:
                     ui.warn(_('%s: cannot copy - %s\n') %
                             (relsrc, inst.strerror))
                     return True # report a failure
 
         if ui.verbose or not exact:
             if rename:
                 ui.status(_('moving %s to %s\n') % (relsrc, reltarget))
             else:
                 ui.status(_('copying %s to %s\n') % (relsrc, reltarget))
 
         targets[abstarget] = abssrc
 
         # fix up dirstate
         scmutil.dirstatecopy(ui, repo, wctx, abssrc, abstarget,
                              dryrun=dryrun, cwd=cwd)
         if rename and not dryrun:
             if not after and srcexists and not samefile:
                 util.unlinkpath(repo.wjoin(abssrc))
             wctx.forget([abssrc])
 
     # pat: ossep
     # dest ossep
     # srcs: list of (hgsep, hgsep, ossep, bool)
     # return: function that takes hgsep and returns ossep
     def targetpathfn(pat, dest, srcs):
         if os.path.isdir(pat):
             abspfx = scmutil.canonpath(repo.root, cwd, pat)
             abspfx = util.localpath(abspfx)
             if destdirexists:
                 striplen = len(os.path.split(abspfx)[0])
             else:
                 striplen = len(abspfx)
             if striplen:
                 striplen += len(os.sep)
             res = lambda p: os.path.join(dest, util.localpath(p)[striplen:])
         elif destdirexists:
             res = lambda p: os.path.join(dest,
                                          os.path.basename(util.localpath(p)))
         else:
             res = lambda p: dest
         return res
 
     # pat: ossep
     # dest ossep
     # srcs: list of (hgsep, hgsep, ossep, bool)
     # return: function that takes hgsep and returns ossep
     def targetpathafterfn(pat, dest, srcs):
         if matchmod.patkind(pat):
             # a mercurial pattern
             res = lambda p: os.path.join(dest,
                                          os.path.basename(util.localpath(p)))
         else:
             abspfx = scmutil.canonpath(repo.root, cwd, pat)
             if len(abspfx) < len(srcs[0][0]):
                 # A directory. Either the target path contains the last
                 # component of the source path or it does not.
                 def evalpath(striplen):
                     score = 0
                     for s in srcs:
                         t = os.path.join(dest, util.localpath(s[0])[striplen:])
                         if os.path.lexists(t):
                             score += 1
                     return score
 
                 abspfx = util.localpath(abspfx)
                 striplen = len(abspfx)
                 if striplen:
                     striplen += len(os.sep)
                 if os.path.isdir(os.path.join(dest, os.path.split(abspfx)[1])):
                     score = evalpath(striplen)
                     striplen1 = len(os.path.split(abspfx)[0])
                     if striplen1:
                         striplen1 += len(os.sep)
                     if evalpath(striplen1) > score:
                         striplen = striplen1
                 res = lambda p: os.path.join(dest,
                                              util.localpath(p)[striplen:])
             else:
                 # a file
                 if destdirexists:
                     res = lambda p: os.path.join(dest,
                                         os.path.basename(util.localpath(p)))
                 else:
                     res = lambda p: dest
         return res
 
 
     pats = scmutil.expandpats(pats)
     if not pats:
         raise util.Abort(_('no source or destination specified'))
     if len(pats) == 1:
         raise util.Abort(_('no destination specified'))
     dest = pats.pop()
     destdirexists = os.path.isdir(dest) and not os.path.islink(dest)
     if not destdirexists:
         if len(pats) > 1 or matchmod.patkind(pats[0]):
             raise util.Abort(_('with multiple sources, destination must be an '
                                'existing directory'))
         if util.endswithsep(dest):
             raise util.Abort(_('destination %s is not a directory') % dest)
 
     tfn = targetpathfn
     if after:
         tfn = targetpathafterfn
     copylist = []
     for pat in pats:
         srcs = walkpat(pat)
         if not srcs:
             continue
         copylist.append((tfn(pat, dest, srcs), srcs))
     if not copylist:
         raise util.Abort(_('no files to copy'))
 
     errors = 0
     for targetpath, srcs in copylist:
         for abssrc, relsrc, exact in srcs:
             if copyfile(abssrc, relsrc, targetpath(abssrc), exact):
                 errors += 1
 
     if errors:
         ui.warn(_('(consider using --after)\n'))
 
     return errors != 0
 
 def service(opts, parentfn=None, initfn=None, runfn=None, logfile=None,
     runargs=None, appendpid=False):
     '''Run a command as a service.'''
 
     if opts['daemon'] and not opts['daemon_pipefds']:
         # Signal child process startup with file removal
         lockfd, lockpath = tempfile.mkstemp(prefix='hg-service-')
         os.close(lockfd)
         try:
             if not runargs:
                 runargs = util.hgcmd() + sys.argv[1:]
             runargs.append('--daemon-pipefds=%s' % lockpath)
             # Don't pass --cwd to the child process, because we've already
             # changed directory.
             for i in xrange(1, len(runargs)):
                 if runargs[i].startswith('--cwd='):
                     del runargs[i]
                     break
                 elif runargs[i].startswith('--cwd'):
                     del runargs[i:i + 2]
                     break
             def condfn():
                 return not os.path.exists(lockpath)
             pid = util.rundetached(runargs, condfn)
             if pid < 0:
                 raise util.Abort(_('child process failed to start'))
         finally:
             try:
                 os.unlink(lockpath)
             except OSError, e:
                 if e.errno != errno.ENOENT:
                     raise
         if parentfn:
             return parentfn(pid)
         else:
             return
 
     if initfn:
         initfn()
 
     if opts['pid_file']:
         mode = appendpid and 'a' or 'w'
         fp = open(opts['pid_file'], mode)
         fp.write(str(os.getpid()) + '\n')
         fp.close()
 
     if opts['daemon_pipefds']:
         lockpath = opts['daemon_pipefds']
         try:
             os.setsid()
         except AttributeError:
             pass
         os.unlink(lockpath)
         util.hidewindow()
         sys.stdout.flush()
         sys.stderr.flush()
 
         nullfd = os.open(os.devnull, os.O_RDWR)
         logfilefd = nullfd
         if logfile:
             logfilefd = os.open(logfile, os.O_RDWR | os.O_CREAT | os.O_APPEND)
         os.dup2(nullfd, 0)
         os.dup2(logfilefd, 1)
         os.dup2(logfilefd, 2)
         if nullfd not in (0, 1, 2):
             os.close(nullfd)
         if logfile and logfilefd not in (0, 1, 2):
             os.close(logfilefd)
 
     if runfn:
         return runfn()
 
 def export(repo, revs, template='hg-%h.patch', fp=None, switch_parent=False,
            opts=None):
     '''export changesets as hg patches.'''
 
     total = len(revs)
     revwidth = max([len(str(rev)) for rev in revs])
 
     def single(rev, seqno, fp):
         ctx = repo[rev]
         node = ctx.node()
         parents = [p.node() for p in ctx.parents() if p]
         branch = ctx.branch()
         if switch_parent:
             parents.reverse()
         prev = (parents and parents[0]) or nullid
 
         shouldclose = False
         if not fp and len(template) > 0:
             desc_lines = ctx.description().rstrip().split('\n')
             desc = desc_lines[0]    #Commit always has a first line.
             fp = makefileobj(repo, template, node, desc=desc, total=total,
                              seqno=seqno, revwidth=revwidth, mode='ab')
             if fp != template:
                 shouldclose = True
         if fp and fp != sys.stdout and util.safehasattr(fp, 'name'):
             repo.ui.note("%s\n" % fp.name)
 
         if not fp:
             write = repo.ui.write
         else:
             def write(s, **kw):
                 fp.write(s)
 
 
         write("# HG changeset patch\n")
         write("# User %s\n" % ctx.user())
         write("# Date %d %d\n" % ctx.date())
         if branch and branch != 'default':
             write("# Branch %s\n" % branch)
         write("# Node ID %s\n" % hex(node))
         write("# Parent  %s\n" % hex(prev))
         if len(parents) > 1:
             write("# Parent  %s\n" % hex(parents[1]))
         write(ctx.description().rstrip())
         write("\n\n")
 
         for chunk, label in patch.diffui(repo, prev, node, opts=opts):
             write(chunk, label=label)
 
         if shouldclose:
             fp.close()
 
     for seqno, rev in enumerate(revs):
         single(rev, seqno + 1, fp)
 
 def diffordiffstat(ui, repo, diffopts, node1, node2, match,
                    changes=None, stat=False, fp=None, prefix='',
                    listsubrepos=False):
     '''show diff or diffstat.'''
     if fp is None:
         write = ui.write
     else:
         def write(s, **kw):
             fp.write(s)
 
     if stat:
         diffopts = diffopts.copy(context=0)
         width = 80
         if not ui.plain():
             width = ui.termwidth()
         chunks = patch.diff(repo, node1, node2, match, changes, diffopts,
                             prefix=prefix)
         for chunk, label in patch.diffstatui(util.iterlines(chunks),
                                              width=width,
                                              git=diffopts.git):
             write(chunk, label=label)
     else:
         for chunk, label in patch.diffui(repo, node1, node2, match,
                                          changes, diffopts, prefix=prefix):
             write(chunk, label=label)
 
     if listsubrepos:
         ctx1 = repo[node1]
         ctx2 = repo[node2]
         for subpath, sub in subrepo.itersubrepos(ctx1, ctx2):
             tempnode2 = node2
             try:
                 if node2 is not None:
                     tempnode2 = ctx2.substate[subpath][1]
             except KeyError:
                 # A subrepo that existed in node1 was deleted between node1 and
                 # node2 (inclusive). Thus, ctx2's substate won't contain that
                 # subpath. The best we can do is to ignore it.
                 tempnode2 = None
             submatch = matchmod.narrowmatcher(subpath, match)
             sub.diff(diffopts, tempnode2, submatch, changes=changes,
                      stat=stat, fp=fp, prefix=prefix)
 
 class changeset_printer(object):
     '''show changeset information when templating not requested.'''
 
     def __init__(self, ui, repo, patch, diffopts, buffered):
         self.ui = ui
         self.repo = repo
         self.buffered = buffered
         self.patch = patch
         self.diffopts = diffopts
         self.header = {}
         self.hunk = {}
         self.lastheader = None
         self.footer = None
 
     def flush(self, rev):
         if rev in self.header:
             h = self.header[rev]
             if h != self.lastheader:
                 self.lastheader = h
                 self.ui.write(h)
             del self.header[rev]
         if rev in self.hunk:
             self.ui.write(self.hunk[rev])
             del self.hunk[rev]
             return 1
         return 0
 
     def close(self):
         if self.footer:
             self.ui.write(self.footer)
 
     def show(self, ctx, copies=None, matchfn=None, **props):
         if self.buffered:
             self.ui.pushbuffer()
             self._show(ctx, copies, matchfn, props)
             self.hunk[ctx.rev()] = self.ui.popbuffer(labeled=True)
         else:
             self._show(ctx, copies, matchfn, props)
 
     def _show(self, ctx, copies, matchfn, props):
         '''show a single changeset or file revision'''
         changenode = ctx.node()
         rev = ctx.rev()
 
         if self.ui.quiet:
             self.ui.write("%d:%s\n" % (rev, short(changenode)),
                           label='log.node')
             return
 
         log = self.repo.changelog
         date = util.datestr(ctx.date())
 
         hexfunc = self.ui.debugflag and hex or short
 
         parents = [(p, hexfunc(log.node(p)))
                    for p in self._meaningful_parentrevs(log, rev)]
 
         self.ui.write(_("changeset:   %d:%s\n") % (rev, hexfunc(changenode)),
                       label='log.changeset changeset.%s' % ctx.phasestr())
 
         branch = ctx.branch()
         # don't show the default branch name
         if branch != 'default':
             self.ui.write(_("branch:      %s\n") % branch,
                           label='log.branch')
         for bookmark in self.repo.nodebookmarks(changenode):
             self.ui.write(_("bookmark:    %s\n") % bookmark,
                     label='log.bookmark')
         for tag in self.repo.nodetags(changenode):
             self.ui.write(_("tag:         %s\n") % tag,
                           label='log.tag')
         if self.ui.debugflag and ctx.phase():
             self.ui.write(_("phase:       %s\n") % _(ctx.phasestr()),
                           label='log.phase')
         for parent in parents:
             self.ui.write(_("parent:      %d:%s\n") % parent,
                           label='log.parent changeset.%s' % ctx.phasestr())
 
         if self.ui.debugflag:
             mnode = ctx.manifestnode()
             self.ui.write(_("manifest:    %d:%s\n") %
                           (self.repo.manifest.rev(mnode), hex(mnode)),
                           label='ui.debug log.manifest')
         self.ui.write(_("user:        %s\n") % ctx.user(),
                       label='log.user')
         self.ui.write(_("date:        %s\n") % date,
                       label='log.date')
 
         if self.ui.debugflag:
             files = self.repo.status(log.parents(changenode)[0], changenode)[:3]
             for key, value in zip([_("files:"), _("files+:"), _("files-:")],
                                   files):
                 if value:
                     self.ui.write("%-12s %s\n" % (key, " ".join(value)),
                                   label='ui.debug log.files')
         elif ctx.files() and self.ui.verbose:
             self.ui.write(_("files:       %s\n") % " ".join(ctx.files()),
                           label='ui.note log.files')
         if copies and self.ui.verbose:
             copies = ['%s (%s)' % c for c in copies]
             self.ui.write(_("copies:      %s\n") % ' '.join(copies),
                           label='ui.note log.copies')
 
         extra = ctx.extra()
         if extra and self.ui.debugflag:
             for key, value in sorted(extra.items()):
                 self.ui.write(_("extra:       %s=%s\n")
                               % (key, value.encode('string_escape')),
                               label='ui.debug log.extra')
 
         description = ctx.description().strip()
         if description:
             if self.ui.verbose:
                 self.ui.write(_("description:\n"),
                               label='ui.note log.description')
                 self.ui.write(description,
                               label='ui.note log.description')
                 self.ui.write("\n\n")
             else:
                 self.ui.write(_("summary:     %s\n") %
                               description.splitlines()[0],
                               label='log.summary')
         self.ui.write("\n")
 
         self.showpatch(changenode, matchfn)
 
     def showpatch(self, node, matchfn):
         if not matchfn:
             matchfn = self.patch
         if matchfn:
             stat = self.diffopts.get('stat')
             diff = self.diffopts.get('patch')
             diffopts = patch.diffopts(self.ui, self.diffopts)
             prev = self.repo.changelog.parents(node)[0]
             if stat:
                 diffordiffstat(self.ui, self.repo, diffopts, prev, node,
                                match=matchfn, stat=True)
             if diff:
                 if stat:
                     self.ui.write("\n")
                 diffordiffstat(self.ui, self.repo, diffopts, prev, node,
                                match=matchfn, stat=False)
             self.ui.write("\n")
 
     def _meaningful_parentrevs(self, log, rev):
         """Return list of meaningful (or all if debug) parentrevs for rev.
 
         For merges (two non-nullrev revisions) both parents are meaningful.
         Otherwise the first parent revision is considered meaningful if it
         is not the preceding revision.
         """
         parents = log.parentrevs(rev)
         if not self.ui.debugflag and parents[1] == nullrev:
             if parents[0] >= rev - 1:
                 parents = []
             else:
                 parents = [parents[0]]
         return parents
 
 
 class changeset_templater(changeset_printer):
     '''format changeset information.'''
 
     def __init__(self, ui, repo, patch, diffopts, mapfile, buffered):
         changeset_printer.__init__(self, ui, repo, patch, diffopts, buffered)
         formatnode = ui.debugflag and (lambda x: x) or (lambda x: x[:12])
         defaulttempl = {
             'parent': '{rev}:{node|formatnode} ',
             'manifest': '{rev}:{node|formatnode}',
             'file_copy': '{name} ({source})',
             'extra': '{key}={value|stringescape}'
             }
         # filecopy is preserved for compatibility reasons
         defaulttempl['filecopy'] = defaulttempl['file_copy']
         self.t = templater.templater(mapfile, {'formatnode': formatnode},
                                      cache=defaulttempl)
         self.cache = {}
 
     def use_template(self, t):
         '''set template string to use'''
         self.t.cache['changeset'] = t
 
     def _meaningful_parentrevs(self, ctx):
         """Return list of meaningful (or all if debug) parentrevs for rev.
         """
         parents = ctx.parents()
         if len(parents) > 1:
             return parents
         if self.ui.debugflag:
             return [parents[0], self.repo['null']]
         if parents[0].rev() >= ctx.rev() - 1:
             return []
         return parents
 
     def _show(self, ctx, copies, matchfn, props):
         '''show a single changeset or file revision'''
 
         showlist = templatekw.showlist
 
         # showparents() behaviour depends on ui trace level which
         # causes unexpected behaviours at templating level and makes
         # it harder to extract it in a standalone function. Its
         # behaviour cannot be changed so leave it here for now.
         def showparents(**args):
             ctx = args['ctx']
             parents = [[('rev', p.rev()), ('node', p.hex())]
                        for p in self._meaningful_parentrevs(ctx)]
             return showlist('parent', parents, **args)
 
         props = props.copy()
         props.update(templatekw.keywords)
         props['parents'] = showparents
         props['templ'] = self.t
         props['ctx'] = ctx
         props['repo'] = self.repo
         props['revcache'] = {'copies': copies}
         props['cache'] = self.cache
 
         # find correct templates for current mode
 
         tmplmodes = [
             (True, None),
             (self.ui.verbose, 'verbose'),
             (self.ui.quiet, 'quiet'),
             (self.ui.debugflag, 'debug'),
         ]
 
         types = {'header': '', 'footer':'', 'changeset': 'changeset'}
         for mode, postfix  in tmplmodes:
             for type in types:
                 cur = postfix and ('%s_%s' % (type, postfix)) or type
                 if mode and cur in self.t:
                     types[type] = cur
 
         try:
 
             # write header
             if types['header']:
                 h = templater.stringify(self.t(types['header'], **props))
                 if self.buffered:
                     self.header[ctx.rev()] = h
                 else:
                     if self.lastheader != h:
                         self.lastheader = h
                         self.ui.write(h)
 
             # write changeset metadata, then patch if requested
             key = types['changeset']
             self.ui.write(templater.stringify(self.t(key, **props)))
             self.showpatch(ctx.node(), matchfn)
 
             if types['footer']:
                 if not self.footer:
                     self.footer = templater.stringify(self.t(types['footer'],
                                                       **props))
 
         except KeyError, inst:
             msg = _("%s: no key named '%s'")
             raise util.Abort(msg % (self.t.mapfile, inst.args[0]))
         except SyntaxError, inst:
             raise util.Abort('%s: %s' % (self.t.mapfile, inst.args[0]))
 
 def show_changeset(ui, repo, opts, buffered=False):
     """show one changeset using template or regular display.
 
     Display format will be the first non-empty hit of:
     1. option 'template'
     2. option 'style'
     3. [ui] setting 'logtemplate'
     4. [ui] setting 'style'
     If all of these values are either the unset or the empty string,
     regular display via changeset_printer() is done.
     """
     # options
     patch = False
     if opts.get('patch') or opts.get('stat'):
         patch = scmutil.matchall(repo)
 
     tmpl = opts.get('template')
     style = None
     if tmpl:
         tmpl = templater.parsestring(tmpl, quoted=False)
     else:
         style = opts.get('style')
 
     # ui settings
     if not (tmpl or style):
         tmpl = ui.config('ui', 'logtemplate')
         if tmpl:
             try:
                 tmpl = templater.parsestring(tmpl)
             except SyntaxError:
                 tmpl = templater.parsestring(tmpl, quoted=False)
         else:
             style = util.expandpath(ui.config('ui', 'style', ''))
 
     if not (tmpl or style):
         return changeset_printer(ui, repo, patch, opts, buffered)
 
     mapfile = None
     if style and not tmpl:
         mapfile = style
         if not os.path.split(mapfile)[0]:
             mapname = (templater.templatepath('map-cmdline.' + mapfile)
                        or templater.templatepath(mapfile))
             if mapname:
                 mapfile = mapname
 
     try:
         t = changeset_templater(ui, repo, patch, opts, mapfile, buffered)
     except SyntaxError, inst:
         raise util.Abort(inst.args[0])
     if tmpl:
         t.use_template(tmpl)
     return t
 
 def finddate(ui, repo, date):
     """Find the tipmost changeset that matches the given date spec"""
 
     df = util.matchdate(date)
     m = scmutil.matchall(repo)
     results = {}
 
     def prep(ctx, fns):
         d = ctx.date()
         if df(d[0]):
             results[ctx.rev()] = d
 
     for ctx in walkchangerevs(repo, m, {'rev': None}, prep):
         rev = ctx.rev()
         if rev in results:
             ui.status(_("found revision %s from %s\n") %
                       (rev, util.datestr(results[rev])))
             return str(rev)
 
     raise util.Abort(_("revision matching date not found"))
 
 def increasingwindows(start, end, windowsize=8, sizelimit=512):
     if start < end:
         while start < end:
             yield start, min(windowsize, end - start)
             start += windowsize
             if windowsize < sizelimit:
                 windowsize *= 2
     else:
         while start > end:
             yield start, min(windowsize, start - end - 1)
             start -= windowsize
             if windowsize < sizelimit:
                 windowsize *= 2
 
 def walkchangerevs(repo, match, opts, prepare):
     '''Iterate over files and the revs in which they changed.
 
     Callers most commonly need to iterate backwards over the history
     in which they are interested. Doing so has awful (quadratic-looking)
     performance, so we use iterators in a "windowed" way.
 
     We walk a window of revisions in the desired order.  Within the
     window, we first walk forwards to gather data, then in the desired
     order (usually backwards) to display it.
 
     This function returns an iterator yielding contexts. Before
     yielding each context, the iterator will first call the prepare
     function on each context in the window in forward order.'''
 
     follow = opts.get('follow') or opts.get('follow_first')
 
     if not len(repo):
         return []
     if opts.get('rev'):
         revs = scmutil.revrange(repo, opts.get('rev'))
     elif follow:
         revs = repo.revs('reverse(:.)')
     else:
         revs = list(repo)
         revs.reverse()
     if not revs:
         return []
     wanted = set()
     slowpath = match.anypats() or (match.files() and opts.get('removed'))
     fncache = {}
     change = repo.changectx
 
     # First step is to fill wanted, the set of revisions that we want to yield.
     # When it does not induce extra cost, we also fill fncache for revisions in
     # wanted: a cache of filenames that were changed (ctx.files()) and that
     # match the file filtering conditions.
 
     if not slowpath and not match.files():
         # No files, no patterns.  Display all revs.
         wanted = set(revs)
     copies = []
 
     if not slowpath and match.files():
         # We only have to read through the filelog to find wanted revisions
 
         minrev, maxrev = min(revs), max(revs)
         def filerevgen(filelog, last):
             """
             Only files, no patterns.  Check the history of each file.
 
             Examines filelog entries within minrev, maxrev linkrev range
             Returns an iterator yielding (linkrev, parentlinkrevs, copied)
             tuples in backwards order
             """
             cl_count = len(repo)
             revs = []
             for j in xrange(0, last + 1):
                 linkrev = filelog.linkrev(j)
                 if linkrev < minrev:
                     continue
                 # only yield rev for which we have the changelog, it can
                 # happen while doing "hg log" during a pull or commit
                 if linkrev >= cl_count:
                     break
 
                 parentlinkrevs = []
                 for p in filelog.parentrevs(j):
                     if p != nullrev:
                         parentlinkrevs.append(filelog.linkrev(p))
                 n = filelog.node(j)
                 revs.append((linkrev, parentlinkrevs,
                              follow and filelog.renamed(n)))
 
             return reversed(revs)
         def iterfiles():
             pctx = repo['.']
             for filename in match.files():
                 if follow:
                     if filename not in pctx:
                         raise util.Abort(_('cannot follow file not in parent '
                                            'revision: "%s"') % filename)
                     yield filename, pctx[filename].filenode()
                 else:
                     yield filename, None
             for filename_node in copies:
                 yield filename_node
         for file_, node in iterfiles():
             filelog = repo.file(file_)
             if not len(filelog):
                 if node is None:
                     # A zero count may be a directory or deleted file, so
                     # try to find matching entries on the slow path.
                     if follow:
                         raise util.Abort(
                             _('cannot follow nonexistent file: "%s"') % file_)
                     slowpath = True
                     break
                 else:
                     continue
 
             if node is None:
                 last = len(filelog) - 1
             else:
                 last = filelog.rev(node)
 
 
             # keep track of all ancestors of the file
             ancestors = set([filelog.linkrev(last)])
 
             # iterate from latest to oldest revision
             for rev, flparentlinkrevs, copied in filerevgen(filelog, last):
                 if not follow:
                     if rev > maxrev:
                         continue
                 else:
                     # Note that last might not be the first interesting
                     # rev to us:
                     # if the file has been changed after maxrev, we'll
                     # have linkrev(last) > maxrev, and we still need
                     # to explore the file graph
                     if rev not in ancestors:
                         continue
                     # XXX insert 1327 fix here
                     if flparentlinkrevs:
                         ancestors.update(flparentlinkrevs)
 
                 fncache.setdefault(rev, []).append(file_)
                 wanted.add(rev)
                 if copied:
                     copies.append(copied)
 
         # We decided to fall back to the slowpath because at least one
         # of the paths was not a file. Check to see if at least one of them
         # existed in history, otherwise simply return
         if slowpath:
             for path in match.files():
                 if path == '.' or path in repo.store:
                     break
                 else:
                     return []
 
     if slowpath:
         # We have to read the changelog to match filenames against
         # changed files
 
         if follow:
             raise util.Abort(_('can only follow copies/renames for explicit '
                                'filenames'))
 
         # The slow path checks files modified in every changeset.
         for i in sorted(revs):
             ctx = change(i)
             matches = filter(match, ctx.files())
             if matches:
                 fncache[i] = matches
                 wanted.add(i)
 
     class followfilter(object):
         def __init__(self, onlyfirst=False):
             self.startrev = nullrev
             self.roots = set()
             self.onlyfirst = onlyfirst
 
         def match(self, rev):
             def realparents(rev):
                 if self.onlyfirst:
                     return repo.changelog.parentrevs(rev)[0:1]
                 else:
                     return filter(lambda x: x != nullrev,
                                   repo.changelog.parentrevs(rev))
 
             if self.startrev == nullrev:
                 self.startrev = rev
                 return True
 
             if rev > self.startrev:
                 # forward: all descendants
                 if not self.roots:
                     self.roots.add(self.startrev)
                 for parent in realparents(rev):
                     if parent in self.roots:
                         self.roots.add(rev)
                         return True
             else:
                 # backwards: all parents
                 if not self.roots:
                     self.roots.update(realparents(self.startrev))
                 if rev in self.roots:
                     self.roots.remove(rev)
                     self.roots.update(realparents(rev))
                     return True
 
             return False
 
     # it might be worthwhile to do this in the iterator if the rev range
     # is descending and the prune args are all within that range
     for rev in opts.get('prune', ()):
         rev = repo[rev].rev()
         ff = followfilter()
         stop = min(revs[0], revs[-1])
         for x in xrange(rev, stop - 1, -1):
             if ff.match(x):
                 wanted.discard(x)
 
     # Now that wanted is correctly initialized, we can iterate over the
     # revision range, yielding only revisions in wanted.
     def iterate():
         if follow and not match.files():
             ff = followfilter(onlyfirst=opts.get('follow_first'))
             def want(rev):
                 return ff.match(rev) and rev in wanted
         else:
             def want(rev):
                 return rev in wanted
 
         for i, window in increasingwindows(0, len(revs)):
             nrevs = [rev for rev in revs[i:i + window] if want(rev)]
             for rev in sorted(nrevs):
                 fns = fncache.get(rev)
                 ctx = change(rev)
                 if not fns:
                     def fns_generator():
                         for f in ctx.files():
                             if match(f):
                                 yield f
                     fns = fns_generator()
                 prepare(ctx, fns)
             for rev in nrevs:
                 yield change(rev)
     return iterate()
 
 def _makegraphfilematcher(repo, pats, followfirst):
     # When displaying a revision with --patch --follow FILE, we have
     # to know which file of the revision must be diffed. With
     # --follow, we want the names of the ancestors of FILE in the
     # revision, stored in "fcache". "fcache" is populated by
     # reproducing the graph traversal already done by --follow revset
     # and relating linkrevs to file names (which is not "correct" but
     # good enough).
     fcache = {}
     fcacheready = [False]
     pctx = repo['.']
     wctx = repo[None]
 
     def populate():
         for fn in pats:
             for i in ((pctx[fn],), pctx[fn].ancestors(followfirst=followfirst)):
                 for c in i:
                     fcache.setdefault(c.linkrev(), set()).add(c.path())
 
     def filematcher(rev):
         if not fcacheready[0]:
             # Lazy initialization
             fcacheready[0] = True
             populate()
         return scmutil.match(wctx, fcache.get(rev, []), default='path')
 
     return filematcher
 
 def _makegraphlogrevset(repo, pats, opts, revs):
     """Return (expr, filematcher) where expr is a revset string built
     from log options and file patterns or None. If --stat or --patch
     are not passed filematcher is None. Otherwise it is a callable
     taking a revision number and returning a match objects filtering
     the files to be detailed when displaying the revision.
     """
     opt2revset = {
         'no_merges':        ('not merge()', None),
         'only_merges':      ('merge()', None),
         '_ancestors':       ('ancestors(%(val)s)', None),
         '_fancestors':      ('_firstancestors(%(val)s)', None),
         '_descendants':     ('descendants(%(val)s)', None),
         '_fdescendants':    ('_firstdescendants(%(val)s)', None),
         '_matchfiles':      ('_matchfiles(%(val)s)', None),
         'date':             ('date(%(val)r)', None),
         'branch':           ('branch(%(val)r)', ' or '),
         '_patslog':         ('filelog(%(val)r)', ' or '),
         '_patsfollow':      ('follow(%(val)r)', ' or '),
         '_patsfollowfirst': ('_followfirst(%(val)r)', ' or '),
         'keyword':          ('keyword(%(val)r)', ' or '),
         'prune':            ('not (%(val)r or ancestors(%(val)r))', ' and '),
         'user':             ('user(%(val)r)', ' or '),
         }
 
     opts = dict(opts)
     # follow or not follow?
     follow = opts.get('follow') or opts.get('follow_first')
     followfirst = opts.get('follow_first') and 1 or 0
     # --follow with FILE behaviour depends on revs...
     startrev = revs[0]
     followdescendants = (len(revs) > 1 and revs[0] < revs[1]) and 1 or 0
 
     # branch and only_branch are really aliases and must be handled at
     # the same time
     opts['branch'] = opts.get('branch', []) + opts.get('only_branch', [])
     opts['branch'] = [repo.lookupbranch(b) for b in opts['branch']]
     # pats/include/exclude are passed to match.match() directly in
     # _matchfiles() revset but walkchangerevs() builds its matcher with
     # scmutil.match(). The difference is input pats are globbed on
     # platforms without shell expansion (windows).
     pctx = repo[None]
     match, pats = scmutil.matchandpats(pctx, pats, opts)
     slowpath = match.anypats() or (match.files() and opts.get('removed'))
     if not slowpath:
         for f in match.files():
             if follow and f not in pctx:
                 raise util.Abort(_('cannot follow file not in parent '
                                    'revision: "%s"') % f)
             filelog = repo.file(f)
             if not len(filelog):
                 # A zero count may be a directory or deleted file, so
                 # try to find matching entries on the slow path.
                 if follow:
                     raise util.Abort(
                         _('cannot follow nonexistent file: "%s"') % f)
                 slowpath = True
 
         # We decided to fall back to the slowpath because at least one
         # of the paths was not a file. Check to see if at least one of them
         # existed in history - in that case, we'll continue down the
         # slowpath; otherwise, we can turn off the slowpath
         if slowpath:
             for path in match.files():
                 if path == '.' or path in repo.store:
                     break
             else:
                 slowpath = False
 
     if slowpath:
         # See walkchangerevs() slow path.
         #
         if follow:
             raise util.Abort(_('can only follow copies/renames for explicit '
                                'filenames'))
         # pats/include/exclude cannot be represented as separate
         # revset expressions as their filtering logic applies at file
         # level. For instance "-I a -X a" matches a revision touching
         # "a" and "b" while "file(a) and not file(b)" does
         # not. Besides, filesets are evaluated against the working
         # directory.
         matchargs = ['r:', 'd:relpath']
         for p in pats:
             matchargs.append('p:' + p)
         for p in opts.get('include', []):
             matchargs.append('i:' + p)
         for p in opts.get('exclude', []):
             matchargs.append('x:' + p)
         matchargs = ','.join(('%r' % p) for p in matchargs)
         opts['_matchfiles'] = matchargs
     else:
         if follow:
             fpats = ('_patsfollow', '_patsfollowfirst')
             fnopats = (('_ancestors', '_fancestors'),
                        ('_descendants', '_fdescendants'))
             if pats:
                 # follow() revset interprets its file argument as a
                 # manifest entry, so use match.files(), not pats.
                 opts[fpats[followfirst]] = list(match.files())
             else:
                 opts[fnopats[followdescendants][followfirst]] = str(startrev)
         else:
             opts['_patslog'] = list(pats)
 
     filematcher = None
     if opts.get('patch') or opts.get('stat'):
         if follow:
             filematcher = _makegraphfilematcher(repo, pats, followfirst)
         else:
             filematcher = lambda rev: match
 
     expr = []
     for op, val in opts.iteritems():
         if not val:
             continue
         if op not in opt2revset:
             continue
         revop, andor = opt2revset[op]
         if '%(val)' not in revop:
             expr.append(revop)
         else:
             if not isinstance(val, list):
                 e = revop % {'val': val}
             else:
                 e = '(' + andor.join((revop % {'val': v}) for v in val) + ')'
             expr.append(e)
 
     if expr:
         expr = '(' + ' and '.join(expr) + ')'
     else:
         expr = None
     return expr, filematcher
 
 def getgraphlogrevs(repo, pats, opts):
     """Return (revs, expr, filematcher) where revs is an iterable of
     revision numbers, expr is a revset string built from log options
     and file patterns or None, and used to filter 'revs'. If --stat or
     --patch are not passed filematcher is None. Otherwise it is a
     callable taking a revision number and returning a match objects
     filtering the files to be detailed when displaying the revision.
     """
     def increasingrevs(repo, revs, matcher):
         # The sorted input rev sequence is chopped in sub-sequences
         # which are sorted in ascending order and passed to the
         # matcher. The filtered revs are sorted again as they were in
         # the original sub-sequence. This achieve several things:
         #
         # - getlogrevs() now returns a generator which behaviour is
         #   adapted to log need. First results come fast, last ones
         #   are batched for performances.
         #
         # - revset matchers often operate faster on revision in
         #   changelog order, because most filters deal with the
         #   changelog.
         #
         # - revset matchers can reorder revisions. "A or B" typically
         #   returns returns the revision matching A then the revision
         #   matching B. We want to hide this internal implementation
         #   detail from the caller, and sorting the filtered revision
         #   again achieves this.
         for i, window in increasingwindows(0, len(revs), windowsize=1):
             orevs = revs[i:i + window]
             nrevs = set(matcher(repo, sorted(orevs)))
             for rev in orevs:
                 if rev in nrevs:
                     yield rev
 
     if not len(repo):
         return iter([]), None, None
     # Default --rev value depends on --follow but --follow behaviour
     # depends on revisions resolved from --rev...
     follow = opts.get('follow') or opts.get('follow_first')
     if opts.get('rev'):
         revs = scmutil.revrange(repo, opts['rev'])
     else:
         if follow and len(repo) > 0:
             revs = repo.revs('reverse(:.)')
         else:
             revs = list(repo.changelog)
             revs.reverse()
     if not revs:
         return iter([]), None, None
     expr, filematcher = _makegraphlogrevset(repo, pats, opts, revs)
     if expr:
         matcher = revset.match(repo.ui, expr)
         revs = increasingrevs(repo, revs, matcher)
     if not opts.get('hidden'):
         # --hidden is still experimental and not worth a dedicated revset
         # yet. Fortunately, filtering revision number is fast.
         revs = (r for r in revs if r not in repo.hiddenrevs)
     else:
         revs = iter(revs)
     return revs, expr, filematcher
 
 def displaygraph(ui, dag, displayer, showparents, edgefn, getrenamed=None,
                  filematcher=None):
     seen, state = [], graphmod.asciistate()
     for rev, type, ctx, parents in dag:
         char = 'o'
         if ctx.node() in showparents:
             char = '@'
         elif ctx.obsolete():
             char = 'x'
         copies = None
         if getrenamed and ctx.rev():
             copies = []
             for fn in ctx.files():
                 rename = getrenamed(fn, ctx.rev())
                 if rename:
                     copies.append((fn, rename[0]))
         revmatchfn = None
         if filematcher is not None:
             revmatchfn = filematcher(ctx.rev())
         displayer.show(ctx, copies=copies, matchfn=revmatchfn)
         lines = displayer.hunk.pop(rev).split('\n')
         if not lines[-1]:
             del lines[-1]
         displayer.flush(rev)
         edges = edgefn(type, char, lines, seen, rev, parents)
         for type, char, lines, coldata in edges:
             graphmod.ascii(ui, state, type, char, lines, coldata)
     displayer.close()
 
 def graphlog(ui, repo, *pats, **opts):
     # Parameters are identical to log command ones
     revs, expr, filematcher = getgraphlogrevs(repo, pats, opts)
     revs = sorted(revs, reverse=1)
     limit = loglimit(opts)
     if limit is not None:
         revs = revs[:limit]
     revdag = graphmod.dagwalker(repo, revs)
 
     getrenamed = None
     if opts.get('copies'):
         endrev = None
         if opts.get('rev'):
             endrev = max(scmutil.revrange(repo, opts.get('rev'))) + 1
         getrenamed = templatekw.getrenamedfn(repo, endrev=endrev)
     displayer = show_changeset(ui, repo, opts, buffered=True)
     showparents = [ctx.node() for ctx in repo[None].parents()]
     displaygraph(ui, revdag, displayer, showparents,
                  graphmod.asciiedges, getrenamed, filematcher)
 
 def checkunsupportedgraphflags(pats, opts):
     for op in ["newest_first"]:
         if op in opts and opts[op]:
             raise util.Abort(_("-G/--graph option is incompatible with --%s")
                              % op.replace("_", "-"))
 
 def graphrevs(repo, nodes, opts):
     limit = loglimit(opts)
     nodes.reverse()
     if limit is not None:
         nodes = nodes[:limit]
     return graphmod.nodes(repo, nodes)
 
 def add(ui, repo, match, dryrun, listsubrepos, prefix, explicitonly):
     join = lambda f: os.path.join(prefix, f)
     bad = []
     oldbad = match.bad
     match.bad = lambda x, y: bad.append(x) or oldbad(x, y)
     names = []
     wctx = repo[None]
     cca = None
     abort, warn = scmutil.checkportabilityalert(ui)
     if abort or warn:
         cca = scmutil.casecollisionauditor(ui, abort, repo.dirstate)
     for f in repo.walk(match):
         exact = match.exact(f)
         if exact or not explicitonly and f not in repo.dirstate:
             if cca:
                 cca(f)
             names.append(f)
             if ui.verbose or not exact:
                 ui.status(_('adding %s\n') % match.rel(join(f)))
 
     for subpath in wctx.substate:
         sub = wctx.sub(subpath)
         try:
             submatch = matchmod.narrowmatcher(subpath, match)
             if listsubrepos:
                 bad.extend(sub.add(ui, submatch, dryrun, listsubrepos, prefix,
                                    False))
             else:
                 bad.extend(sub.add(ui, submatch, dryrun, listsubrepos, prefix,
                                    True))
         except error.LookupError:
             ui.status(_("skipping missing subrepository: %s\n")
                            % join(subpath))
 
     if not dryrun:
         rejected = wctx.add(names, prefix)
         bad.extend(f for f in rejected if f in match.files())
     return bad
 
 def forget(ui, repo, match, prefix, explicitonly):
     join = lambda f: os.path.join(prefix, f)
     bad = []
     oldbad = match.bad
     match.bad = lambda x, y: bad.append(x) or oldbad(x, y)
     wctx = repo[None]
     forgot = []
     s = repo.status(match=match, clean=True)
     forget = sorted(s[0] + s[1] + s[3] + s[6])
     if explicitonly:
         forget = [f for f in forget if match.exact(f)]
 
     for subpath in wctx.substate:
         sub = wctx.sub(subpath)
         try:
             submatch = matchmod.narrowmatcher(subpath, match)
             subbad, subforgot = sub.forget(ui, submatch, prefix)
             bad.extend([subpath + '/' + f for f in subbad])
             forgot.extend([subpath + '/' + f for f in subforgot])
         except error.LookupError:
             ui.status(_("skipping missing subrepository: %s\n")
                            % join(subpath))
 
     if not explicitonly:
         for f in match.files():
             if f not in repo.dirstate and not os.path.isdir(match.rel(join(f))):
                 if f not in forgot:
                     if os.path.exists(match.rel(join(f))):
                         ui.warn(_('not removing %s: '
                                   'file is already untracked\n')
                                 % match.rel(join(f)))
                     bad.append(f)
 
     for f in forget:
         if ui.verbose or not match.exact(f):
             ui.status(_('removing %s\n') % match.rel(join(f)))
 
     rejected = wctx.forget(forget, prefix)
     bad.extend(f for f in rejected if f in match.files())
     forgot.extend(forget)
     return bad, forgot
 
 def duplicatecopies(repo, rev, p1):
     "Reproduce copies found in the source revision in the dirstate for grafts"
     for dst, src in copies.pathcopies(repo[p1], repo[rev]).iteritems():
         repo.dirstate.copy(src, dst)
 
 def commit(ui, repo, commitfunc, pats, opts):
     '''commit the specified files or all outstanding changes'''
     date = opts.get('date')
     if date:
         opts['date'] = util.parsedate(date)
     message = logmessage(ui, opts)
 
     # extract addremove carefully -- this function can be called from a command
     # that doesn't support addremove
     if opts.get('addremove'):
         scmutil.addremove(repo, pats, opts)
 
     return commitfunc(ui, repo, message,
                       scmutil.match(repo[None], pats, opts), opts)
 
 def amend(ui, repo, commitfunc, old, extra, pats, opts):
     ui.note(_('amending changeset %s\n') % old)
     base = old.p1()
 
     wlock = lock = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
         tr = repo.transaction('amend')
         try:
             # See if we got a message from -m or -l, if not, open the editor
             # with the message of the changeset to amend
             message = logmessage(ui, opts)
             # First, do a regular commit to record all changes in the working
             # directory (if there are any)
             ui.callhooks = False
             try:
                 opts['message'] = 'temporary amend commit for %s' % old
                 node = commit(ui, repo, commitfunc, pats, opts)
             finally:
                 ui.callhooks = True
             ctx = repo[node]
 
             # Participating changesets:
             #
             # node/ctx o - new (intermediate) commit that contains changes
             #          |   from working dir to go into amending commit
             #          |   (or a workingctx if there were no changes)
             #          |
             # old      o - changeset to amend
             #          |
             # base     o - parent of amending changeset
 
             # Update extra dict from amended commit (e.g. to preserve graft
             # source)
             extra.update(old.extra())
 
             # Also update it from the intermediate commit or from the wctx
             extra.update(ctx.extra())
 
             files = set(old.files())
 
             # Second, we use either the commit we just did, or if there were no
             # changes the parent of the working directory as the version of the
             # files in the final amend commit
             if node:
                 ui.note(_('copying changeset %s to %s\n') % (ctx, base))
 
                 user = ctx.user()
                 date = ctx.date()
                 # Recompute copies (avoid recording a -> b -> a)
                 copied = copies.pathcopies(base, ctx)
 
                 # Prune files which were reverted by the updates: if old
                 # introduced file X and our intermediate commit, node,
                 # renamed that file, then those two files are the same and
                 # we can discard X from our list of files. Likewise if X
                 # was deleted, it's no longer relevant
                 files.update(ctx.files())
 
                 def samefile(f):
                     if f in ctx.manifest():
                         a = ctx.filectx(f)
                         if f in base.manifest():
                             b = base.filectx(f)
                             return (not a.cmp(b)
                                     and a.flags() == b.flags())
                         else:
                             return False
                     else:
                         return f not in base.manifest()
                 files = [f for f in files if not samefile(f)]
 
                 def filectxfn(repo, ctx_, path):
                     try:
                         fctx = ctx[path]
                         flags = fctx.flags()
                         mctx = context.memfilectx(fctx.path(), fctx.data(),
                                                   islink='l' in flags,
                                                   isexec='x' in flags,
                                                   copied=copied.get(path))
                         return mctx
                     except KeyError:
                         raise IOError
             else:
                 ui.note(_('copying changeset %s to %s\n') % (old, base))
 
                 # Use version of files as in the old cset
                 def filectxfn(repo, ctx_, path):
                     try:
                         return old.filectx(path)
                     except KeyError:
                         raise IOError
 
                 user = opts.get('user') or old.user()
                 date = opts.get('date') or old.date()
             if not message:
                 message = old.description()
 
+            pureextra = extra.copy()
+            extra['amend_source'] = old.hex()
+
             new = context.memctx(repo,
                                  parents=[base.node(), nullid],
                                  text=message,
                                  files=files,
                                  filectxfn=filectxfn,
                                  user=user,
                                  date=date,
                                  extra=extra)
             new._text = commitforceeditor(repo, new, [])
+
+            newdesc =  changelog.stripdesc(new.description())
+            if ((not node)
+                and newdesc == old.description()
+                and user == old.user()
+                and date == old.date()
+                and pureextra == old.extra()):
+                # nothing changed. continuing here would create a new node
+                # anyway because of the amend_source noise.
+                #
+                # This not what we expect from amend.
+                return old.node()
+
             ph = repo.ui.config('phases', 'new-commit', phases.draft)
             try:
                 repo.ui.setconfig('phases', 'new-commit', old.phase())
                 newid = repo.commitctx(new)
             finally:
                 repo.ui.setconfig('phases', 'new-commit', ph)
             if newid != old.node():
                 # Reroute the working copy parent to the new changeset
                 repo.setparents(newid, nullid)
 
                 # Move bookmarks from old parent to amend commit
                 bms = repo.nodebookmarks(old.node())
                 if bms:
                     for bm in bms:
                         repo._bookmarks[bm] = newid
                     bookmarks.write(repo)
             #commit the whole amend process
             if obsolete._enabled and newid != old.node():
                 # mark the new changeset as successor of the rewritten one
                 new = repo[newid]
                 obs = [(old, (new,))]
                 if node:
                     obs.append((ctx, (new,)))
 
                 obsolete.createmarkers(repo, obs)
             tr.close()
         finally:
             tr.release()
         if (not obsolete._enabled) and newid != old.node():
             # Strip the intermediate commit (if there was one) and the amended
             # commit
             if node:
                 ui.note(_('stripping intermediate changeset %s\n') % ctx)
             ui.note(_('stripping amended changeset %s\n') % old)
             repair.strip(ui, repo, old.node(), topic='amend-backup')
     finally:
         lockmod.release(wlock, lock)
     return newid
 
 def commiteditor(repo, ctx, subs):
     if ctx.description():
         return ctx.description()
     return commitforceeditor(repo, ctx, subs)
 
 def commitforceeditor(repo, ctx, subs):
     edittext = []
     modified, added, removed = ctx.modified(), ctx.added(), ctx.removed()
     if ctx.description():
         edittext.append(ctx.description())
     edittext.append("")
     edittext.append("") # Empty line between message and comments.
     edittext.append(_("HG: Enter commit message."
                       "  Lines beginning with 'HG:' are removed."))
     edittext.append(_("HG: Leave message empty to abort commit."))
     edittext.append("HG: --")
     edittext.append(_("HG: user: %s") % ctx.user())
     if ctx.p2():
         edittext.append(_("HG: branch merge"))
     if ctx.branch():
         edittext.append(_("HG: branch '%s'") % ctx.branch())
     edittext.extend([_("HG: subrepo %s") % s for s in subs])
     edittext.extend([_("HG: added %s") % f for f in added])
     edittext.extend([_("HG: changed %s") % f for f in modified])
     edittext.extend([_("HG: removed %s") % f for f in removed])
     if not added and not modified and not removed:
         edittext.append(_("HG: no files changed"))
     edittext.append("")
     # run editor in the repository root
     olddir = os.getcwd()
     os.chdir(repo.root)
     text = repo.ui.edit("\n".join(edittext), ctx.user())
     text = re.sub("(?m)^HG:.*(\n|$)", "", text)
     os.chdir(olddir)
 
     if not text.strip():
         raise util.Abort(_("empty commit message"))
 
     return text
 
 def revert(ui, repo, ctx, parents, *pats, **opts):
     parent, p2 = parents
     node = ctx.node()
 
     mf = ctx.manifest()
     if node == parent:
         pmf = mf
     else:
         pmf = None
 
     # need all matching names in dirstate and manifest of target rev,
     # so have to walk both. do not print errors if files exist in one
     # but not other.
 
     names = {}
 
     wlock = repo.wlock()
     try:
         # walk dirstate.
 
         m = scmutil.match(repo[None], pats, opts)
         m.bad = lambda x, y: False
         for abs in repo.walk(m):
             names[abs] = m.rel(abs), m.exact(abs)
 
         # walk target manifest.
 
         def badfn(path, msg):
             if path in names:
                 return
             if path in ctx.substate:
                 return
             path_ = path + '/'
             for f in names:
                 if f.startswith(path_):
                     return
             ui.warn("%s: %s\n" % (m.rel(path), msg))
 
         m = scmutil.match(ctx, pats, opts)
         m.bad = badfn
         for abs in ctx.walk(m):
             if abs not in names:
                 names[abs] = m.rel(abs), m.exact(abs)
 
         # get the list of subrepos that must be reverted
         targetsubs = [s for s in ctx.substate if m(s)]
         m = scmutil.matchfiles(repo, names)
         changes = repo.status(match=m)[:4]
         modified, added, removed, deleted = map(set, changes)
 
         # if f is a rename, also revert the source
         cwd = repo.getcwd()
         for f in added:
             src = repo.dirstate.copied(f)
             if src and src not in names and repo.dirstate[src] == 'r':
                 removed.add(src)
                 names[src] = (repo.pathto(src, cwd), True)
 
         def removeforget(abs):
             if repo.dirstate[abs] == 'a':
                 return _('forgetting %s\n')
             return _('removing %s\n')
 
         revert = ([], _('reverting %s\n'))
         add = ([], _('adding %s\n'))
         remove = ([], removeforget)
         undelete = ([], _('undeleting %s\n'))
 
         disptable = (
             # dispatch table:
             #   file state
             #   action if in target manifest
             #   action if not in target manifest
             #   make backup if in target manifest
             #   make backup if not in target manifest
             (modified, revert, remove, True, True),
             (added, revert, remove, True, False),
             (removed, undelete, None, False, False),
             (deleted, revert, remove, False, False),
             )
 
         for abs, (rel, exact) in sorted(names.items()):
             mfentry = mf.get(abs)
             target = repo.wjoin(abs)
             def handle(xlist, dobackup):
                 xlist[0].append(abs)
                 if (dobackup and not opts.get('no_backup') and
                     os.path.lexists(target)):
                     bakname = "%s.orig" % rel
                     ui.note(_('saving current version of %s as %s\n') %
                             (rel, bakname))
                     if not opts.get('dry_run'):
                         util.rename(target, bakname)
                 if ui.verbose or not exact:
                     msg = xlist[1]
                     if not isinstance(msg, basestring):
                         msg = msg(abs)
                     ui.status(msg % rel)
             for table, hitlist, misslist, backuphit, backupmiss in disptable:
                 if abs not in table:
                     continue
                 # file has changed in dirstate
                 if mfentry:
                     handle(hitlist, backuphit)
                 elif misslist is not None:
                     handle(misslist, backupmiss)
                 break
             else:
                 if abs not in repo.dirstate:
                     if mfentry:
                         handle(add, True)
                     elif exact:
                         ui.warn(_('file not managed: %s\n') % rel)
                     continue
                 # file has not changed in dirstate
                 if node == parent:
                     if exact:
                         ui.warn(_('no changes needed to %s\n') % rel)
                     continue
                 if pmf is None:
                     # only need parent manifest in this unlikely case,
                     # so do not read by default
                     pmf = repo[parent].manifest()
                 if abs in pmf and mfentry:
                     # if version of file is same in parent and target
                     # manifests, do nothing
                     if (pmf[abs] != mfentry or
                         pmf.flags(abs) != mf.flags(abs)):
                         handle(revert, False)
                 else:
                     handle(remove, False)
 
         if not opts.get('dry_run'):
             def checkout(f):
                 fc = ctx[f]
                 repo.wwrite(f, fc.data(), fc.flags())
 
             audit_path = scmutil.pathauditor(repo.root)
             for f in remove[0]:
                 if repo.dirstate[f] == 'a':
                     repo.dirstate.drop(f)
                     continue
                 audit_path(f)
                 try:
                     util.unlinkpath(repo.wjoin(f))
                 except OSError:
                     pass
                 repo.dirstate.remove(f)
 
             normal = None
             if node == parent:
                 # We're reverting to our parent. If possible, we'd like status
                 # to report the file as clean. We have to use normallookup for
                 # merges to avoid losing information about merged/dirty files.
                 if p2 != nullid:
                     normal = repo.dirstate.normallookup
                 else:
                     normal = repo.dirstate.normal
             for f in revert[0]:
                 checkout(f)
                 if normal:
                     normal(f)
 
             for f in add[0]:
                 checkout(f)
                 repo.dirstate.add(f)
 
             normal = repo.dirstate.normallookup
             if node == parent and p2 == nullid:
                 normal = repo.dirstate.normal
             for f in undelete[0]:
                 checkout(f)
                 normal(f)
 
             if targetsubs:
                 # Revert the subrepos on the revert list
                 for sub in targetsubs:
                     ctx.sub(sub).revert(ui, ctx.substate[sub], *pats, **opts)
     finally:
         wlock.release()
 
 def command(table):
     '''returns a function object bound to table which can be used as
     a decorator for populating table as a command table'''
 
     def cmd(name, options, synopsis=None):
         def decorator(func):
             if synopsis:
                 table[name] = func, options[:], synopsis
             else:
                 table[name] = func, options[:]
             return func
         return decorator
 
     return cmd

tests/test-commit-amend.t

@@ -1,444 +1,456 b''
   $ hg init
 
 Setup:
 
   $ echo a >> a
   $ hg ci -Am 'base'
   adding a
 
 Refuse to amend public csets:
 
   $ hg phase -r . -p
   $ hg ci --amend
   abort: cannot amend public changesets
   [255]
   $ hg phase -r . -f -d
 
   $ echo a >> a
   $ hg ci -Am 'base1'
 
 Nothing to amend:
 
   $ hg ci --amend
   nothing changed
   [1]
 
   $ cat >> $HGRCPATH <<EOF
   > [hooks]
   > pretxncommit.foo = sh -c "echo \\"pretxncommit \$HG_NODE\\"; hg id -r \$HG_NODE"
   > EOF
 
 Amending changeset with changes in working dir:
 
   $ echo a >> a
   $ hg ci --amend -m 'amend base1'
-  pretxncommit 9cd25b479c51be2f4ed2c38e7abdf7ce67d8e0dc
-  9cd25b479c51 tip
+  pretxncommit 43f1ba15f28a50abf0aae529cf8a16bfced7b149
+  43f1ba15f28a tip
   saved backup bundle to $TESTTMP/.hg/strip-backup/489edb5b847d-amend-backup.hg (glob)
   $ echo 'pretxncommit.foo = ' >> $HGRCPATH
   $ hg diff -c .
-  diff -r ad120869acf0 -r 9cd25b479c51 a
+  diff -r ad120869acf0 -r 43f1ba15f28a a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,3 @@
    a
   +a
   +a
   $ hg log
-  changeset:   1:9cd25b479c51
+  changeset:   1:43f1ba15f28a
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     amend base1
   
   changeset:   0:ad120869acf0
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     base
   
 
 Add new file:
 
   $ echo b > b
   $ hg ci --amend -Am 'amend base1 new file'
   adding b
-  saved backup bundle to $TESTTMP/.hg/strip-backup/9cd25b479c51-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/43f1ba15f28a-amend-backup.hg (glob)
 
 Remove file that was added in amended commit:
 
   $ hg rm b
   $ hg ci --amend -m 'amend base1 remove new file'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/e2bb3ecffd2f-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/b8e3cb2b3882-amend-backup.hg (glob)
 
   $ hg cat b
-  b: no such file in rev 664a9b2d60cd
+  b: no such file in rev 74609c7f506e
   [1]
 
 No changes, just a different message:
 
   $ hg ci -v --amend -m 'no changes, new message'
-  amending changeset 664a9b2d60cd
-  copying changeset 664a9b2d60cd to ad120869acf0
+  amending changeset 74609c7f506e
+  copying changeset 74609c7f506e to ad120869acf0
   a
-  stripping amended changeset 664a9b2d60cd
+  stripping amended changeset 74609c7f506e
   1 changesets found
-  saved backup bundle to $TESTTMP/.hg/strip-backup/664a9b2d60cd-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/74609c7f506e-amend-backup.hg (glob)
   1 changesets found
   adding branch
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
-  committed changeset 1:ea6e356ff2ad
+  committed changeset 1:1cd866679df8
   $ hg diff -c .
-  diff -r ad120869acf0 -r ea6e356ff2ad a
+  diff -r ad120869acf0 -r 1cd866679df8 a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +1,3 @@
    a
   +a
   +a
   $ hg log
-  changeset:   1:ea6e356ff2ad
+  changeset:   1:1cd866679df8
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     no changes, new message
   
   changeset:   0:ad120869acf0
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     base
   
 
 Disable default date on commit so when -d isn't given, the old date is preserved:
 
   $ echo '[defaults]' >> $HGRCPATH
   $ echo 'commit=' >> $HGRCPATH
 
 Test -u/-d:
 
   $ hg ci --amend -u foo -d '1 0'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/ea6e356ff2ad-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/1cd866679df8-amend-backup.hg (glob)
   $ echo a >> a
   $ hg ci --amend -u foo -d '1 0'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/377b91ce8b56-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/780e6f23e03d-amend-backup.hg (glob)
   $ hg log -r .
-  changeset:   1:2c94e4a5756f
+  changeset:   1:5f357c7560ab
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:01 1970 +0000
   summary:     no changes, new message
   
 
 Open editor with old commit message if a message isn't given otherwise:
 
   $ cat > editor.sh << '__EOF__'
   > #!/bin/sh
   > cat $1
   > echo "another precious commit message" > "$1"
   > __EOF__
   $ HGEDITOR="\"sh\" \"`pwd`/editor.sh\"" hg commit --amend -v
-  amending changeset 2c94e4a5756f
-  copying changeset 2c94e4a5756f to ad120869acf0
+  amending changeset 5f357c7560ab
+  copying changeset 5f357c7560ab to ad120869acf0
   no changes, new message
   
   
   HG: Enter commit message.  Lines beginning with 'HG:' are removed.
   HG: Leave message empty to abort commit.
   HG: --
   HG: user: foo
   HG: branch 'default'
   HG: changed a
   a
-  stripping amended changeset 2c94e4a5756f
+  stripping amended changeset 5f357c7560ab
   1 changesets found
-  saved backup bundle to $TESTTMP/.hg/strip-backup/2c94e4a5756f-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/5f357c7560ab-amend-backup.hg (glob)
   1 changesets found
   adding branch
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
-  committed changeset 1:ffb49186f961
+  committed changeset 1:7ab3bf440b54
 
 Same, but with changes in working dir (different code path):
 
   $ echo a >> a
   $ HGEDITOR="\"sh\" \"`pwd`/editor.sh\"" hg commit --amend -v
-  amending changeset ffb49186f961
+  amending changeset 7ab3bf440b54
   a
-  copying changeset a4f8a65b7c6a to ad120869acf0
+  copying changeset a0ea9b1a4c8c to ad120869acf0
   another precious commit message
   
   
   HG: Enter commit message.  Lines beginning with 'HG:' are removed.
   HG: Leave message empty to abort commit.
   HG: --
   HG: user: foo
   HG: branch 'default'
   HG: changed a
   a
-  stripping intermediate changeset a4f8a65b7c6a
-  stripping amended changeset ffb49186f961
+  stripping intermediate changeset a0ea9b1a4c8c
+  stripping amended changeset 7ab3bf440b54
   2 changesets found
-  saved backup bundle to $TESTTMP/.hg/strip-backup/ffb49186f961-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/7ab3bf440b54-amend-backup.hg (glob)
   1 changesets found
   adding branch
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
-  committed changeset 1:fb6cca43446f
+  committed changeset 1:ea22a388757c
 
   $ rm editor.sh
   $ hg log -r .
-  changeset:   1:fb6cca43446f
+  changeset:   1:ea22a388757c
   tag:         tip
   user:        foo
   date:        Thu Jan 01 00:00:01 1970 +0000
   summary:     another precious commit message
   
 
 Moving bookmarks, preserve active bookmark:
 
   $ hg book book1
   $ hg book book2
   $ hg ci --amend -m 'move bookmarks'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/fb6cca43446f-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/ea22a388757c-amend-backup.hg (glob)
   $ hg book
-     book1                     1:0cf1c7a51bcf
-   * book2                     1:0cf1c7a51bcf
+     book1                     1:6cec5aa930e2
+   * book2                     1:6cec5aa930e2
   $ echo a >> a
   $ hg ci --amend -m 'move bookmarks'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/0cf1c7a51bcf-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/6cec5aa930e2-amend-backup.hg (glob)
   $ hg book
-     book1                     1:7344472bd951
-   * book2                     1:7344472bd951
+     book1                     1:48bb6e53a15f
+   * book2                     1:48bb6e53a15f
 
   $ echo '[defaults]' >> $HGRCPATH
   $ echo "commit=-d '0 0'" >> $HGRCPATH
 
 Moving branches:
 
   $ hg branch foo
   marked working directory as branch foo
   (branches are permanent and global, did you want a bookmark?)
   $ echo a >> a
   $ hg ci -m 'branch foo'
   $ hg branch default -f
   marked working directory as branch default
   (branches are permanent and global, did you want a bookmark?)
   $ hg ci --amend -m 'back to default'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/1661ca36a2db-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/8ac881fbf49d-amend-backup.hg (glob)
   $ hg branches
-  default                        2:f24ee5961967
+  default                        2:ce12b0b57d46
 
 Close branch:
 
   $ hg up -q 0
   $ echo b >> b
   $ hg branch foo
   marked working directory as branch foo
   (branches are permanent and global, did you want a bookmark?)
   $ hg ci -Am 'fork'
   adding b
   $ echo b >> b
   $ hg ci -mb
   $ hg ci --amend --close-branch -m 'closing branch foo'
   saved backup bundle to $TESTTMP/.hg/strip-backup/c962248fa264-amend-backup.hg (glob)
 
 Same thing, different code path:
 
   $ echo b >> b
   $ hg ci -m 'reopen branch'
   reopening closed branch head 4
   $ echo b >> b
   $ hg ci --amend --close-branch
-  saved backup bundle to $TESTTMP/.hg/strip-backup/5e302dcc12b8-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/027371728205-amend-backup.hg (glob)
   $ hg branches
-  default                        2:f24ee5961967
+  default                        2:ce12b0b57d46
 
 Refuse to amend merges:
 
   $ hg up -q default
   $ hg merge foo
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg ci --amend
   abort: cannot amend while merging
   [255]
   $ hg ci -m 'merge'
   $ hg ci --amend
   abort: cannot amend merge changesets
   [255]
 
 Follow copies/renames:
 
   $ hg mv b c
   $ hg ci -m 'b -> c'
   $ hg mv c d
   $ hg ci --amend -m 'b -> d'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/9c207120aa98-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/b8c6eac7f12e-amend-backup.hg (glob)
   $ hg st --rev '.^' --copies d
   A d
     b
   $ hg cp d e
   $ hg ci -m 'e = d'
   $ hg cp e f
   $ hg ci --amend -m 'f = d'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/fda2b3b27b22-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/7f9761d65613-amend-backup.hg (glob)
   $ hg st --rev '.^' --copies f
   A f
     d
 
   $ mv f f.orig
   $ hg rm -A f
   $ hg ci -m removef
   $ hg cp a f
   $ mv f.orig f
   $ hg ci --amend -m replacef
-  saved backup bundle to $TESTTMP/.hg/strip-backup/20a7413547f9-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/9e8c5f7e3d95-amend-backup.hg (glob)
   $ hg st --change . --copies
   $ hg log -r . --template "{file_copies}\n"
   
 
 Move added file (issue3410):
 
   $ echo g >> g
   $ hg ci -Am g
   adding g
   $ hg mv g h
   $ hg ci --amend
-  saved backup bundle to $TESTTMP/.hg/strip-backup/5daa77a5d616-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/24aa8eacce2b-amend-backup.hg (glob)
   $ hg st --change . --copies h
   A h
   $ hg log -r . --template "{file_copies}\n"
   
 
 Can't rollback an amend:
 
   $ hg rollback
   no rollback information available
   [1]
 
 Preserve extra dict (issue3430):
 
   $ hg branch a
   marked working directory as branch a
   (branches are permanent and global, did you want a bookmark?)
   $ echo a >> a
   $ hg ci -ma
   $ hg ci --amend -m "a'"
-  saved backup bundle to $TESTTMP/.hg/strip-backup/167f8e3031df-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/3837aa2a2fdb-amend-backup.hg (glob)
   $ hg log -r . --template "{branch}\n"
   a
   $ hg ci --amend -m "a''"
-  saved backup bundle to $TESTTMP/.hg/strip-backup/ceac1a44c806-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/c05c06be7514-amend-backup.hg (glob)
   $ hg log -r . --template "{branch}\n"
   a
 
 Also preserve other entries in the dict that are in the old commit,
 first graft something so there's an additional entry:
 
   $ hg up 0 -q
   $ echo z > z
   $ hg ci -Am 'fork'
   adding z
   created new head
   $ hg up 11
   5 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg graft 12
   grafting revision 12
   $ hg ci --amend -m 'graft amend'
-  saved backup bundle to $TESTTMP/.hg/strip-backup/18a5124daf7a-amend-backup.hg (glob)
+  saved backup bundle to $TESTTMP/.hg/strip-backup/bd010aea3f39-amend-backup.hg (glob)
   $ hg log -r . --debug | grep extra
+  extra:       amend_source=bd010aea3f39f3fb2a2f884b9ccb0471cd77398e
   extra:       branch=a
   extra:       source=2647734878ef0236dda712fae9c1651cf694ea8a
 
 Preserve phase
 
   $ hg phase '.^::.'
   11: draft
   13: draft
   $ hg phase --secret --force .
   $ hg phase '.^::.'
   11: draft
   13: secret
   $ hg commit --amend -m 'amend for phase' -q
   $ hg phase '.^::.'
   11: draft
   13: secret
 
 Test amend with obsolete
 ---------------------------
 
 Enable obsolete
 
   $ cat > ${TESTTMP}/obs.py << EOF
   > import mercurial.obsolete
   > mercurial.obsolete._enabled = True
   > EOF
   $ echo '[extensions]' >> $HGRCPATH
   $ echo "obs=${TESTTMP}/obs.py" >> $HGRCPATH
 
 
 Amend with no files changes
 
   $ hg id -n
   13
   $ hg ci --amend -m 'babar'
   $ hg id -n
   14
   $ hg log -Gl 3 --style=compact
-  @  14[tip]:11   43df5a5434ad   1970-01-01 00:00 +0000   test
+  @  14[tip]:11   b650e6ee8614   1970-01-01 00:00 +0000   test
   |    babar
   |
   | o  12:0   2647734878ef   1970-01-01 00:00 +0000   test
   | |    fork
   | |
-  o |  11   7e09f708a0e9   1970-01-01 00:00 +0000   test
+  o |  11   3334b7925910   1970-01-01 00:00 +0000   test
   | |    a''
   | |
   $ hg log -Gl 4 --hidden --style=compact
-  @  14[tip]:11   43df5a5434ad   1970-01-01 00:00 +0000   test
+  @  14[tip]:11   b650e6ee8614   1970-01-01 00:00 +0000   test
   |    babar
   |
-  | x  13:11   175fafee6f44   1970-01-01 00:00 +0000   test
+  | x  13:11   68ff8ff97044   1970-01-01 00:00 +0000   test
   |/     amend for phase
   |
   | o  12:0   2647734878ef   1970-01-01 00:00 +0000   test
   | |    fork
   | |
-  o |  11   7e09f708a0e9   1970-01-01 00:00 +0000   test
+  o |  11   3334b7925910   1970-01-01 00:00 +0000   test
   | |    a''
   | |
 
 Amend with files changes
 
 (note: the extra commit over 15 is a temporary junk I would be happy to get
 ride of)
 
   $ echo 'babar' >> a
   $ hg commit --amend
   $ hg log -Gl 6 --hidden --style=compact
-  @  16[tip]:11   31e0a4a1b04a   1970-01-01 00:00 +0000   test
+  @  16[tip]:11   9f9e9bccf56c   1970-01-01 00:00 +0000   test
   |    babar
   |
-  | x  15   053c696ada75   1970-01-01 00:00 +0000   test
-  | |    temporary amend commit for 43df5a5434ad
+  | x  15   90fef497c56f   1970-01-01 00:00 +0000   test
+  | |    temporary amend commit for b650e6ee8614
   | |
-  | x  14:11   43df5a5434ad   1970-01-01 00:00 +0000   test
+  | x  14:11   b650e6ee8614   1970-01-01 00:00 +0000   test
   |/     babar
   |
-  | x  13:11   175fafee6f44   1970-01-01 00:00 +0000   test
+  | x  13:11   68ff8ff97044   1970-01-01 00:00 +0000   test
   |/     amend for phase
   |
   | o  12:0   2647734878ef   1970-01-01 00:00 +0000   test
   | |    fork
   | |
-  o |  11   7e09f708a0e9   1970-01-01 00:00 +0000   test
+  o |  11   3334b7925910   1970-01-01 00:00 +0000   test
   | |    a''
   | |
 
 
+Test that amend does not make it easy to create obsoletescence cycle
+---------------------------------------------------------------------
+
+
+  $ hg id -r 14
+  b650e6ee8614 (a)
+  $ hg revert -ar 14
+  reverting a
+  $ hg commit --amend
+  $ hg id
+  b99e5df575f7 (a) tip

tests/test-keyword.t

@@ -1,1139 +1,1139 b''
   $ cat <<EOF >> $HGRCPATH
   > [extensions]
   > keyword =
   > mq =
   > notify =
   > record =
   > transplant =
   > [ui]
   > interactive = true
   > EOF
 
 hide outer repo
   $ hg init
 
 Run kwdemo before [keyword] files are set up
 as it would succeed without uisetup otherwise
 
   $ hg --quiet kwdemo
   [extensions]
   keyword =
   [keyword]
   demo.txt = 
   [keywordset]
   svn = False
   [keywordmaps]
   Author = {author|user}
   Date = {date|utcdate}
   Header = {root}/{file},v {node|short} {date|utcdate} {author|user}
   Id = {file|basename},v {node|short} {date|utcdate} {author|user}
   RCSFile = {file|basename},v
   RCSfile = {file|basename},v
   Revision = {node|short}
   Source = {root}/{file},v
   $Author: test $
   $Date: ????/??/?? ??:??:?? $ (glob)
   $Header: */demo.txt,v ???????????? ????/??/?? ??:??:?? test $ (glob)
   $Id: demo.txt,v ???????????? ????/??/?? ??:??:?? test $ (glob)
   $RCSFile: demo.txt,v $
   $RCSfile: demo.txt,v $
   $Revision: ???????????? $ (glob)
   $Source: */demo.txt,v $ (glob)
 
   $ hg --quiet kwdemo "Branch = {branches}"
   [extensions]
   keyword =
   [keyword]
   demo.txt = 
   [keywordset]
   svn = False
   [keywordmaps]
   Branch = {branches}
   $Branch: demobranch $
 
   $ cat <<EOF >> $HGRCPATH
   > [keyword]
   > ** =
   > b = ignore
   > i = ignore
   > [hooks]
   > EOF
   $ cp $HGRCPATH $HGRCPATH.nohooks
   > cat <<EOF >> $HGRCPATH
   > commit=
   > commit.test=cp a hooktest
   > EOF
 
   $ hg init Test-bndl
   $ cd Test-bndl
 
 kwshrink should exit silently in empty/invalid repo
 
   $ hg kwshrink
 
 Symlinks cannot be created on Windows.
 A bundle to test this was made with:
  hg init t
  cd t
  echo a > a
  ln -s a sym
  hg add sym
  hg ci -m addsym -u mercurial
  hg bundle --base null ../test-keyword.hg
 
   $ hg pull -u "$TESTDIR"/bundles/test-keyword.hg
   pulling from *test-keyword.hg (glob)
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ echo 'expand $Id$' > a
   $ echo 'do not process $Id:' >> a
   $ echo 'xxx $' >> a
   $ echo 'ignore $Id$' > b
 
 Output files as they were created
 
   $ cat a b
   expand $Id$
   do not process $Id:
   xxx $
   ignore $Id$
 
 no kwfiles
 
   $ hg kwfiles
 
 untracked candidates
 
   $ hg -v kwfiles --unknown
   k a
 
 Add files and check status
 
   $ hg addremove
   adding a
   adding b
   $ hg status
   A a
   A b
 
 
 Default keyword expansion including commit hook
 Interrupted commit should not change state or run commit hook
 
   $ hg --debug commit
   abort: empty commit message
   [255]
   $ hg status
   A a
   A b
 
 Commit with several checks
 
   $ hg --debug commit -mabsym -u 'User Name <[e-mail]>'
   a
   b
   overwriting a expanding keywords
   running hook commit.test: cp a hooktest
   committed changeset 1:ef63ca68695bc9495032c6fda1350c71e6d256e9
   $ hg status
   ? hooktest
   $ hg debugrebuildstate
   $ hg --quiet identify
   ef63ca68695b
 
 cat files in working directory with keywords expanded
 
   $ cat a b
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   do not process $Id:
   xxx $
   ignore $Id$
 
 hg cat files and symlink, no expansion
 
   $ hg cat sym a b && echo
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   do not process $Id:
   xxx $
   ignore $Id$
   a
 
   $ diff a hooktest
 
   $ cp $HGRCPATH.nohooks $HGRCPATH
   $ rm hooktest
 
 hg status of kw-ignored binary file starting with '\1\n'
 
   >>> open("i", "wb").write("\1\nfoo")
   $ hg -q commit -Am metasep i
   $ hg status
   >>> open("i", "wb").write("\1\nbar")
   $ hg status
   M i
   $ hg -q commit -m "modify metasep" i
   $ hg status --rev 2:3
   M i
   $ touch empty
   $ hg -q commit -A -m "another file"
   $ hg status -A --rev 3:4 i
   C i
 
   $ hg -q strip -n 2
 
 Test hook execution
 
 bundle
 
   $ hg bundle --base null ../kw.hg
   2 changesets found
   $ cd ..
   $ hg init Test
   $ cd Test
 
 Notify on pull to check whether keywords stay as is in email
 ie. if patch.diff wrapper acts as it should
 
   $ cat <<EOF >> $HGRCPATH
   > [hooks]
   > incoming.notify = python:hgext.notify.hook
   > [notify]
   > sources = pull
   > diffstat = False
   > maxsubject = 15
   > [reposubs]
   > * = Test
   > EOF
 
 Pull from bundle and trigger notify
 
   $ hg pull -u ../kw.hg
   pulling from ../kw.hg
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 3 changes to 3 files
   Content-Type: text/plain; charset="us-ascii"
   MIME-Version: 1.0
   Content-Transfer-Encoding: 7bit
   Date: * (glob)
   Subject: changeset in...
   From: mercurial
   X-Hg-Notification: changeset a2392c293916
   Message-Id: <hg.a2392c293916*> (glob)
   To: Test
   
   changeset a2392c293916 in $TESTTMP/Test (glob)
   details: $TESTTMP/Test?cmd=changeset;node=a2392c293916
   description:
   	addsym
   
   diffs (6 lines):
   
   diff -r 000000000000 -r a2392c293916 sym
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/sym	Sat Feb 09 20:25:47 2008 +0100
   @@ -0,0 +1,1 @@
   +a
   \ No newline at end of file
   Content-Type: text/plain; charset="us-ascii"
   MIME-Version: 1.0
   Content-Transfer-Encoding: 7bit
   Date:* (glob)
   Subject: changeset in...
   From: User Name <[e-mail]>
   X-Hg-Notification: changeset ef63ca68695b
   Message-Id: <hg.ef63ca68695b*> (glob)
   To: Test
   
   changeset ef63ca68695b in $TESTTMP/Test (glob)
   details: $TESTTMP/Test?cmd=changeset;node=ef63ca68695b
   description:
   	absym
   
   diffs (12 lines):
   
   diff -r a2392c293916 -r ef63ca68695b a
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,3 @@
   +expand $Id$
   +do not process $Id:
   +xxx $
   diff -r a2392c293916 -r ef63ca68695b b
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,1 @@
   +ignore $Id$
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ cp $HGRCPATH.nohooks $HGRCPATH
 
 Touch files and check with status
 
   $ touch a b
   $ hg status
 
 Update and expand
 
   $ rm sym a b
   $ hg update -C
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat a b
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   do not process $Id:
   xxx $
   ignore $Id$
 
 Check whether expansion is filewise and file mode is preserved
 
   $ echo '$Id$' > c
   $ echo 'tests for different changenodes' >> c
 #if unix-permissions
   $ chmod 600 c
   $ ls -l c | cut -b 1-10
   -rw-------
 #endif
 
 commit file c
 
   $ hg commit -A -mcndiff -d '1 0' -u 'User Name <[e-mail]>'
   adding c
 #if unix-permissions
   $ ls -l c | cut -b 1-10
   -rw-------
 #endif
 
 force expansion
 
   $ hg -v kwexpand
   overwriting a expanding keywords
   overwriting c expanding keywords
 
 compare changenodes in a and c
 
   $ cat a c
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   do not process $Id:
   xxx $
   $Id: c,v 40a904bbbe4c 1970/01/01 00:00:01 user $
   tests for different changenodes
 
 record
 
   $ echo '$Id$' > r
   $ hg add r
 
 record chunk
 
   >>> lines = open('a', 'rb').readlines()
   >>> lines.insert(1, 'foo\n')
   >>> lines.append('bar\n')
   >>> open('a', 'wb').writelines(lines)
   $ hg record -d '10 1' -m rectest a<<EOF
   > y
   > y
   > n
   > EOF
   diff --git a/a b/a
   2 hunks, 2 lines changed
   examine changes to 'a'? [Ynesfdaq?] 
   @@ -1,3 +1,4 @@
    expand $Id$
   +foo
    do not process $Id:
    xxx $
   record change 1/2 to 'a'? [Ynesfdaq?] 
   @@ -2,2 +3,3 @@
    do not process $Id:
    xxx $
   +bar
   record change 2/2 to 'a'? [Ynesfdaq?] 
 
   $ hg identify
   5f5eb23505c3+ tip
   $ hg status
   M a
   A r
 
 Cat modified file a
 
   $ cat a
   expand $Id: a,v 5f5eb23505c3 1970/01/01 00:00:10 test $
   foo
   do not process $Id:
   xxx $
   bar
 
 Diff remaining chunk
 
   $ hg diff a
   diff -r 5f5eb23505c3 a
   --- a/a	Thu Jan 01 00:00:09 1970 -0000
   +++ b/a	* (glob)
   @@ -2,3 +2,4 @@
    foo
    do not process $Id:
    xxx $
   +bar
 
   $ hg rollback
   repository tip rolled back to revision 2 (undo commit)
   working directory now based on revision 2
 
 Record all chunks in file a
 
   $ echo foo > msg
 
  - do not use "hg record -m" here!
 
   $ hg record -l msg -d '11 1' a<<EOF
   > y
   > y
   > y
   > EOF
   diff --git a/a b/a
   2 hunks, 2 lines changed
   examine changes to 'a'? [Ynesfdaq?] 
   @@ -1,3 +1,4 @@
    expand $Id$
   +foo
    do not process $Id:
    xxx $
   record change 1/2 to 'a'? [Ynesfdaq?] 
   @@ -2,2 +3,3 @@
    do not process $Id:
    xxx $
   +bar
   record change 2/2 to 'a'? [Ynesfdaq?] 
 
 File a should be clean
 
   $ hg status -A a
   C a
 
 rollback and revert expansion
 
   $ cat a
   expand $Id: a,v 78e0a02d76aa 1970/01/01 00:00:11 test $
   foo
   do not process $Id:
   xxx $
   bar
   $ hg --verbose rollback
   repository tip rolled back to revision 2 (undo commit)
   working directory now based on revision 2
   overwriting a expanding keywords
   $ hg status a
   M a
   $ cat a
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   foo
   do not process $Id:
   xxx $
   bar
   $ echo '$Id$' > y
   $ echo '$Id$' > z
   $ hg add y
   $ hg commit -Am "rollback only" z
   $ cat z
   $Id: z,v 45a5d3adce53 1970/01/01 00:00:00 test $
   $ hg --verbose rollback
   repository tip rolled back to revision 2 (undo commit)
   working directory now based on revision 2
   overwriting z shrinking keywords
 
 Only z should be overwritten
 
   $ hg status a y z
   M a
   A y
   A z
   $ cat z
   $Id$
   $ hg forget y z
   $ rm y z
 
 record added file alone
 
   $ hg -v record -l msg -d '12 2' r<<EOF
   > y
   > EOF
   diff --git a/r b/r
   new file mode 100644
   examine changes to 'r'? [Ynesfdaq?] 
   r
   committed changeset 3:82a2f715724d
   overwriting r expanding keywords
  - status call required for dirstate.normallookup() check
   $ hg status r
   $ hg --verbose rollback
   repository tip rolled back to revision 2 (undo commit)
   working directory now based on revision 2
   overwriting r shrinking keywords
   $ hg forget r
   $ rm msg r
   $ hg update -C
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 record added keyword ignored file
 
   $ echo '$Id$' > i
   $ hg add i
   $ hg --verbose record -d '13 1' -m recignored<<EOF
   > y
   > EOF
   diff --git a/i b/i
   new file mode 100644
   examine changes to 'i'? [Ynesfdaq?] 
   i
   committed changeset 3:9f40ceb5a072
   $ cat i
   $Id$
   $ hg -q rollback
   $ hg forget i
   $ rm i
 
 amend
 
   $ echo amend >> a
   $ echo amend >> b
   $ hg -q commit -d '14 1' -m 'prepare amend'
 
   $ hg --debug commit --amend -d '15 1' -m 'amend without changes' | grep keywords
   overwriting a expanding keywords
   $ hg -q id
-  577e60613a88
+  67d8c481a6be
   $ head -1 a
-  expand $Id: a,v 577e60613a88 1970/01/01 00:00:15 test $
+  expand $Id: a,v 67d8c481a6be 1970/01/01 00:00:15 test $
 
   $ hg -q strip -n tip
 
 Test patch queue repo
 
   $ hg init --mq
   $ hg qimport -r tip -n mqtest.diff
   $ hg commit --mq -m mqtest
 
 Keywords should not be expanded in patch
 
   $ cat .hg/patches/mqtest.diff
   # HG changeset patch
   # User User Name <[e-mail]>
   # Date 1 0
   # Node ID 40a904bbbe4cd4ab0a1f28411e35db26341a40ad
   # Parent  ef63ca68695bc9495032c6fda1350c71e6d256e9
   cndiff
   
   diff -r ef63ca68695b -r 40a904bbbe4c c
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/c	Thu Jan 01 00:00:01 1970 +0000
   @@ -0,0 +1,2 @@
   +$Id$
   +tests for different changenodes
 
   $ hg qpop
   popping mqtest.diff
   patch queue now empty
 
 qgoto, implying qpush, should expand
 
   $ hg qgoto mqtest.diff
   applying mqtest.diff
   now at: mqtest.diff
   $ cat c
   $Id: c,v 40a904bbbe4c 1970/01/01 00:00:01 user $
   tests for different changenodes
   $ hg cat c
   $Id: c,v 40a904bbbe4c 1970/01/01 00:00:01 user $
   tests for different changenodes
 
 Keywords should not be expanded in filelog
 
   $ hg --config 'extensions.keyword=!' cat c
   $Id$
   tests for different changenodes
 
 qpop and move on
 
   $ hg qpop
   popping mqtest.diff
   patch queue now empty
 
 Copy and show added kwfiles
 
   $ hg cp a c
   $ hg kwfiles
   a
   c
 
 Commit and show expansion in original and copy
 
   $ hg --debug commit -ma2c -d '1 0' -u 'User Name <[e-mail]>'
   c
    c: copy a:0045e12f6c5791aac80ca6cbfd97709a88307292
   removing unknown node 40a904bbbe4c from 1-phase boundary
   overwriting c expanding keywords
   committed changeset 2:25736cf2f5cbe41f6be4e6784ef6ecf9f3bbcc7d
   $ cat a c
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   do not process $Id:
   xxx $
   expand $Id: c,v 25736cf2f5cb 1970/01/01 00:00:01 user $
   do not process $Id:
   xxx $
 
 Touch copied c and check its status
 
   $ touch c
   $ hg status
 
 Copy kwfile to keyword ignored file unexpanding keywords
 
   $ hg --verbose copy a i
   copying a to i
   overwriting i shrinking keywords
   $ head -n 1 i
   expand $Id$
   $ hg forget i
   $ rm i
 
 Copy ignored file to ignored file: no overwriting
 
   $ hg --verbose copy b i
   copying b to i
   $ hg forget i
   $ rm i
 
 cp symlink file; hg cp -A symlink file (part1)
 - copied symlink points to kwfile: overwrite
 
 #if symlink
   $ cp sym i
   $ ls -l i
   -rw-r--r--* (glob)
   $ head -1 i
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   $ hg copy --after --verbose sym i
   copying sym to i
   overwriting i shrinking keywords
   $ head -1 i
   expand $Id$
   $ hg forget i
   $ rm i
 #endif
 
 Test different options of hg kwfiles
 
   $ hg kwfiles
   a
   c
   $ hg -v kwfiles --ignore
   I b
   I sym
   $ hg kwfiles --all
   K a
   K c
   I b
   I sym
 
 Diff specific revision
 
   $ hg diff --rev 1
   diff -r ef63ca68695b c
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/c	* (glob)
   @@ -0,0 +1,3 @@
   +expand $Id$
   +do not process $Id:
   +xxx $
 
 Status after rollback:
 
   $ hg rollback
   repository tip rolled back to revision 1 (undo commit)
   working directory now based on revision 1
   $ hg status
   A c
   $ hg update --clean
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 #if symlink
 
 cp symlink file; hg cp -A symlink file (part2)
 - copied symlink points to kw ignored file: do not overwrite
 
   $ cat a > i
   $ ln -s i symignored
   $ hg commit -Am 'fake expansion in ignored and symlink' i symignored
   $ cp symignored x
   $ hg copy --after --verbose symignored x
   copying symignored to x
   $ head -n 1 x
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   $ hg forget x
   $ rm x
 
   $ hg rollback
   repository tip rolled back to revision 1 (undo commit)
   working directory now based on revision 1
   $ hg update --clean
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm i symignored
 
 #endif
 
 Custom keywordmaps as argument to kwdemo
 
   $ hg --quiet kwdemo "Xinfo = {author}: {desc}"
   [extensions]
   keyword =
   [keyword]
   ** = 
   b = ignore
   demo.txt = 
   i = ignore
   [keywordset]
   svn = False
   [keywordmaps]
   Xinfo = {author}: {desc}
   $Xinfo: test: hg keyword configuration and expansion example $
 
 Configure custom keywordmaps
 
   $ cat <<EOF >>$HGRCPATH
   > [keywordmaps]
   > Id = {file} {node|short} {date|rfc822date} {author|user}
   > Xinfo = {author}: {desc}
   > EOF
 
 Cat and hg cat files before custom expansion
 
   $ cat a b
   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $
   do not process $Id:
   xxx $
   ignore $Id$
   $ hg cat sym a b && echo
   expand $Id: a ef63ca68695b Thu, 01 Jan 1970 00:00:00 +0000 user $
   do not process $Id:
   xxx $
   ignore $Id$
   a
 
 Write custom keyword and prepare multi-line commit message
 
   $ echo '$Xinfo$' >> a
   $ cat <<EOF >> log
   > firstline
   > secondline
   > EOF
 
 Interrupted commit should not change state
 
   $ hg commit
   abort: empty commit message
   [255]
   $ hg status
   M a
   ? c
   ? log
 
 Commit with multi-line message and custom expansion
 
   $ hg --debug commit -l log -d '2 0' -u 'User Name <[e-mail]>'
   a
   removing unknown node 40a904bbbe4c from 1-phase boundary
   overwriting a expanding keywords
   committed changeset 2:bb948857c743469b22bbf51f7ec8112279ca5d83
   $ rm log
 
 Stat, verify and show custom expansion (firstline)
 
   $ hg status
   ? c
   $ hg verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   3 files, 3 changesets, 4 total revisions
   $ cat a b
   expand $Id: a bb948857c743 Thu, 01 Jan 1970 00:00:02 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: firstline $
   ignore $Id$
   $ hg cat sym a b && echo
   expand $Id: a bb948857c743 Thu, 01 Jan 1970 00:00:02 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: firstline $
   ignore $Id$
   a
 
 annotate
 
   $ hg annotate a
   1: expand $Id$
   1: do not process $Id:
   1: xxx $
   2: $Xinfo$
 
 remove with status checks
 
   $ hg debugrebuildstate
   $ hg remove a
   $ hg --debug commit -m rma
   committed changeset 3:d14c712653769de926994cf7fbb06c8fbd68f012
   $ hg status
   ? c
 
 Rollback, revert, and check expansion
 
   $ hg rollback
   repository tip rolled back to revision 2 (undo commit)
   working directory now based on revision 2
   $ hg status
   R a
   ? c
   $ hg revert --no-backup --rev tip a
   $ cat a
   expand $Id: a bb948857c743 Thu, 01 Jan 1970 00:00:02 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: firstline $
 
 Clone to test global and local configurations
 
   $ cd ..
 
 Expansion in destination with global configuration
 
   $ hg --quiet clone Test globalconf
   $ cat globalconf/a
   expand $Id: a bb948857c743 Thu, 01 Jan 1970 00:00:02 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: firstline $
 
 No expansion in destination with local configuration in origin only
 
   $ hg --quiet --config 'keyword.**=ignore' clone Test localconf
   $ cat localconf/a
   expand $Id$
   do not process $Id:
   xxx $
   $Xinfo$
 
 Clone to test incoming
 
   $ hg clone -r1 Test Test-a
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 3 changes to 3 files
   updating to branch default
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd Test-a
   $ cat <<EOF >> .hg/hgrc
   > [paths]
   > default = ../Test
   > EOF
   $ hg incoming
   comparing with $TESTTMP/Test (glob)
   searching for changes
   changeset:   2:bb948857c743
   tag:         tip
   user:        User Name <[e-mail]>
   date:        Thu Jan 01 00:00:02 1970 +0000
   summary:     firstline
   
 Imported patch should not be rejected
 
   >>> import re
   >>> text = re.sub(r'(Id.*)', r'\1 rejecttest', open('a').read())
   >>> open('a', 'wb').write(text)
   $ hg --debug commit -m'rejects?' -d '3 0' -u 'User Name <[e-mail]>'
   a
   overwriting a expanding keywords
   committed changeset 2:85e279d709ffc28c9fdd1b868570985fc3d87082
   $ hg export -o ../rejecttest.diff tip
   $ cd ../Test
   $ hg import ../rejecttest.diff
   applying ../rejecttest.diff
   $ cat a b
   expand $Id: a 4e0994474d25 Thu, 01 Jan 1970 00:00:03 +0000 user $ rejecttest
   do not process $Id: rejecttest
   xxx $
   $Xinfo: User Name <[e-mail]>: rejects? $
   ignore $Id$
 
   $ hg rollback
   repository tip rolled back to revision 2 (undo import)
   working directory now based on revision 2
   $ hg update --clean
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 kwexpand/kwshrink on selected files
 
   $ mkdir x
   $ hg copy a x/a
   $ hg --verbose kwshrink a
   overwriting a shrinking keywords
  - sleep required for dirstate.normal() check
   $ sleep 1
   $ hg status a
   $ hg --verbose kwexpand a
   overwriting a expanding keywords
   $ hg status a
 
 kwexpand x/a should abort
 
   $ hg --verbose kwexpand x/a
   abort: outstanding uncommitted changes
   [255]
   $ cd x
   $ hg --debug commit -m xa -d '3 0' -u 'User Name <[e-mail]>'
   x/a
    x/a: copy a:779c764182ce5d43e2b1eb66ce06d7b47bfe342e
   overwriting x/a expanding keywords
   committed changeset 3:b4560182a3f9a358179fd2d835c15e9da379c1e4
   $ cat a
   expand $Id: x/a b4560182a3f9 Thu, 01 Jan 1970 00:00:03 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: xa $
 
 kwshrink a inside directory x
 
   $ hg --verbose kwshrink a
   overwriting x/a shrinking keywords
   $ cat a
   expand $Id$
   do not process $Id:
   xxx $
   $Xinfo$
   $ cd ..
 
 kwexpand nonexistent
 
   $ hg kwexpand nonexistent
   nonexistent:* (glob)
 
 
 #if serve
 hg serve
  - expand with hgweb file
  - no expansion with hgweb annotate/changeset/filediff
  - check errors
 
   $ hg serve -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file/tip/a/?style=raw'
   200 Script output follows
   
   expand $Id: a bb948857c743 Thu, 01 Jan 1970 00:00:02 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: firstline $
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'annotate/tip/a/?style=raw'
   200 Script output follows
   
   
   user@1: expand $Id$
   user@1: do not process $Id:
   user@1: xxx $
   user@2: $Xinfo$
   
   
   
   
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'rev/tip/?style=raw'
   200 Script output follows
   
   
   # HG changeset patch
   # User User Name <[e-mail]>
   # Date 3 0
   # Node ID b4560182a3f9a358179fd2d835c15e9da379c1e4
   # Parent  bb948857c743469b22bbf51f7ec8112279ca5d83
   xa
   
   diff -r bb948857c743 -r b4560182a3f9 x/a
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/x/a	Thu Jan 01 00:00:03 1970 +0000
   @@ -0,0 +1,4 @@
   +expand $Id$
   +do not process $Id:
   +xxx $
   +$Xinfo$
   
   $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'diff/bb948857c743/a?style=raw'
   200 Script output follows
   
   
   diff -r ef63ca68695b -r bb948857c743 a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:02 1970 +0000
   @@ -1,3 +1,4 @@
    expand $Id$
    do not process $Id:
    xxx $
   +$Xinfo$
   
   
   
   
   $ cat errors.log
 #endif
 
 Prepare merge and resolve tests
 
   $ echo '$Id$' > m
   $ hg add m
   $ hg commit -m 4kw
   $ echo foo >> m
   $ hg commit -m 5foo
 
 simplemerge
 
   $ hg update 4
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo foo >> m
   $ hg commit -m 6foo
   created new head
   $ hg merge
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg commit -m simplemerge
   $ cat m
   $Id: m 27d48ee14f67 Thu, 01 Jan 1970 00:00:00 +0000 test $
   foo
 
 conflict: keyword should stay outside conflict zone
 
   $ hg update 4
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo bar >> m
   $ hg commit -m 8bar
   created new head
   $ hg merge
   merging m
   warning: conflicts during merge.
   merging m incomplete! (edit conflicts, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ cat m
   $Id$
   <<<<<<< local
   bar
   =======
   foo
   >>>>>>> other
 
 resolve to local
 
   $ HGMERGE=internal:local hg resolve -a
   $ hg commit -m localresolve
   $ cat m
   $Id: m 800511b3a22d Thu, 01 Jan 1970 00:00:00 +0000 test $
   bar
 
 Test restricted mode with transplant -b
 
   $ hg update 6
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg branch foo
   marked working directory as branch foo
   (branches are permanent and global, did you want a bookmark?)
   $ mv a a.bak
   $ echo foobranch > a
   $ cat a.bak >> a
   $ rm a.bak
   $ hg commit -m 9foobranch
   $ hg update default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg -y transplant -b foo tip
   applying 4aa30d025d50
   4aa30d025d50 transplanted to e00abbf63521
 
 Expansion in changeset but not in file
 
   $ hg tip -p
   changeset:   11:e00abbf63521
   tag:         tip
   parent:      9:800511b3a22d
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     9foobranch
   
   diff -r 800511b3a22d -r e00abbf63521 a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,3 +1,4 @@
   +foobranch
    expand $Id$
    do not process $Id:
    xxx $
   
   $ head -n 2 a
   foobranch
   expand $Id: a e00abbf63521 Thu, 01 Jan 1970 00:00:00 +0000 test $
 
 Turn off expansion
 
   $ hg -q rollback
   $ hg -q update -C
 
 kwshrink with unknown file u
 
   $ cp a u
   $ hg --verbose kwshrink
   overwriting a shrinking keywords
   overwriting m shrinking keywords
   overwriting x/a shrinking keywords
 
 Keywords shrunk in working directory, but not yet disabled
  - cat shows unexpanded keywords
  - hg cat shows expanded keywords
 
   $ cat a b
   expand $Id$
   do not process $Id:
   xxx $
   $Xinfo$
   ignore $Id$
   $ hg cat sym a b && echo
   expand $Id: a bb948857c743 Thu, 01 Jan 1970 00:00:02 +0000 user $
   do not process $Id:
   xxx $
   $Xinfo: User Name <[e-mail]>: firstline $
   ignore $Id$
   a
 
 Now disable keyword expansion
 
   $ rm "$HGRCPATH"
   $ cat a b
   expand $Id$
   do not process $Id:
   xxx $
   $Xinfo$
   ignore $Id$
   $ hg cat sym a b && echo
   expand $Id$
   do not process $Id:
   xxx $
   $Xinfo$
   ignore $Id$
   a
 
   $ cd ..