templater: add new docheader/footer components for XML (issue4135)

The existing header/footer components were templated per-changeset,
and thus couldn't be correctly printed for an empty log

mercurial/cmdutil.py

@@ -1,3348 +1,3359 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, bin, nullid, nullrev, short
 from i18n import _
 import os, sys, errno, re, tempfile, cStringIO, shutil
 import util, scmutil, templater, patch, error, templatekw, revlog, copies
 import match as matchmod
 import repair, graphmod, revset, phases, obsolete, pathutil
 import changelog
 import bookmarks
 import encoding
 import formatter
 import crecord as crecordmod
 import lock as lockmod
 
 def ishunk(x):
     hunkclasses = (crecordmod.uihunk, patch.recordhunk)
     return isinstance(x, hunkclasses)
 
 def newandmodified(chunks, originalchunks):
     newlyaddedandmodifiedfiles = set()
     for chunk in chunks:
         if ishunk(chunk) and chunk.header.isnewfile() and chunk not in \
             originalchunks:
             newlyaddedandmodifiedfiles.add(chunk.header.filename())
     return newlyaddedandmodifiedfiles
 
 def parsealiases(cmd):
     return cmd.lstrip("^").split("|")
 
 def setupwrapcolorwrite(ui):
     # wrap ui.write so diff output can be labeled/colorized
     def wrapwrite(orig, *args, **kw):
         label = kw.pop('label', '')
         for chunk, l in patch.difflabel(lambda: args):
             orig(chunk, label=label + l)
 
     oldwrite = ui.write
     def wrap(*args, **kwargs):
         return wrapwrite(oldwrite, *args, **kwargs)
     setattr(ui, 'write', wrap)
     return oldwrite
 
 def filterchunks(ui, originalhunks, usecurses, testfile, operation=None):
     if usecurses:
         if testfile:
             recordfn = crecordmod.testdecorator(testfile,
                                                 crecordmod.testchunkselector)
         else:
             recordfn = crecordmod.chunkselector
 
         return crecordmod.filterpatch(ui, originalhunks, recordfn, operation)
 
     else:
         return patch.filterpatch(ui, originalhunks, operation)
 
 def recordfilter(ui, originalhunks, operation=None):
     """ Prompts the user to filter the originalhunks and return a list of
     selected hunks.
     *operation* is used for ui purposes to indicate the user
     what kind of filtering they are doing: reverting, commiting, shelving, etc.
     *operation* has to be a translated string.
     """
     usecurses =  ui.configbool('experimental', 'crecord', False)
     testfile = ui.config('experimental', 'crecordtest', None)
     oldwrite = setupwrapcolorwrite(ui)
     try:
         newchunks = filterchunks(ui, originalhunks, usecurses, testfile,
                                  operation)
     finally:
         ui.write = oldwrite
     return newchunks
 
 def dorecord(ui, repo, commitfunc, cmdsuggest, backupall,
             filterfn, *pats, **opts):
     import merge as mergemod
 
     if not ui.interactive():
         if cmdsuggest:
             msg = _('running non-interactively, use %s instead') % cmdsuggest
         else:
             msg = _('running non-interactively')
         raise util.Abort(msg)
 
     # make sure username is set before going interactive
     if not opts.get('user'):
         ui.username() # raise exception, username not provided
 
     def recordfunc(ui, repo, message, match, opts):
         """This is generic record driver.
 
         Its job is to interactively filter local changes, and
         accordingly prepare working directory into a state in which the
         job can be delegated to a non-interactive commit command such as
         'commit' or 'qrefresh'.
 
         After the actual job is done by non-interactive command, the
         working directory is restored to its original state.
 
         In the end we'll record interesting changes, and everything else
         will be left in place, so the user can continue working.
         """
 
         checkunfinished(repo, commit=True)
         merge = len(repo[None].parents()) > 1
         if merge:
             raise util.Abort(_('cannot partially commit a merge '
                                '(use "hg commit" instead)'))
 
         status = repo.status(match=match)
         diffopts = patch.difffeatureopts(ui, opts=opts, whitespace=True)
         diffopts.nodates = True
         diffopts.git = True
         originaldiff =  patch.diff(repo, changes=status, opts=diffopts)
         originalchunks = patch.parsepatch(originaldiff)
 
         # 1. filter patch, so we have intending-to apply subset of it
         try:
             chunks = filterfn(ui, originalchunks)
         except patch.PatchError as err:
             raise util.Abort(_('error parsing patch: %s') % err)
 
         # We need to keep a backup of files that have been newly added and
         # modified during the recording process because there is a previous
         # version without the edit in the workdir
         newlyaddedandmodifiedfiles = newandmodified(chunks, originalchunks)
         contenders = set()
         for h in chunks:
             try:
                 contenders.update(set(h.files()))
             except AttributeError:
                 pass
 
         changed = status.modified + status.added + status.removed
         newfiles = [f for f in changed if f in contenders]
         if not newfiles:
             ui.status(_('no changes to record\n'))
             return 0
 
         modified = set(status.modified)
 
         # 2. backup changed files, so we can restore them in the end
 
         if backupall:
             tobackup = changed
         else:
             tobackup = [f for f in newfiles if f in modified or f in \
                     newlyaddedandmodifiedfiles]
         backups = {}
         if tobackup:
             backupdir = repo.join('record-backups')
             try:
                 os.mkdir(backupdir)
             except OSError as err:
                 if err.errno != errno.EEXIST:
                     raise
         try:
             # backup continues
             for f in tobackup:
                 fd, tmpname = tempfile.mkstemp(prefix=f.replace('/', '_')+'.',
                                                dir=backupdir)
                 os.close(fd)
                 ui.debug('backup %r as %r\n' % (f, tmpname))
                 util.copyfile(repo.wjoin(f), tmpname)
                 shutil.copystat(repo.wjoin(f), tmpname)
                 backups[f] = tmpname
 
             fp = cStringIO.StringIO()
             for c in chunks:
                 fname = c.filename()
                 if fname in backups:
                     c.write(fp)
             dopatch = fp.tell()
             fp.seek(0)
 
             [os.unlink(repo.wjoin(c)) for c in newlyaddedandmodifiedfiles]
             # 3a. apply filtered patch to clean repo  (clean)
             if backups:
                 # Equivalent to hg.revert
                 choices = lambda key: key in backups
                 mergemod.update(repo, repo.dirstate.p1(),
                         False, True, choices)
 
             # 3b. (apply)
             if dopatch:
                 try:
                     ui.debug('applying patch\n')
                     ui.debug(fp.getvalue())
                     patch.internalpatch(ui, repo, fp, 1, eolmode=None)
                 except patch.PatchError as err:
                     raise util.Abort(str(err))
             del fp
 
             # 4. We prepared working directory according to filtered
             #    patch. Now is the time to delegate the job to
             #    commit/qrefresh or the like!
 
             # Make all of the pathnames absolute.
             newfiles = [repo.wjoin(nf) for nf in newfiles]
             return commitfunc(ui, repo, *newfiles, **opts)
         finally:
             # 5. finally restore backed-up files
             try:
                 dirstate = repo.dirstate
                 for realname, tmpname in backups.iteritems():
                     ui.debug('restoring %r to %r\n' % (tmpname, realname))
 
                     if dirstate[realname] == 'n':
                         # without normallookup, restoring timestamp
                         # may cause partially committed files
                         # to be treated as unmodified
                         dirstate.normallookup(realname)
 
                     util.copyfile(tmpname, repo.wjoin(realname))
                     # Our calls to copystat() here and above are a
                     # hack to trick any editors that have f open that
                     # we haven't modified them.
                     #
                     # Also note that this racy as an editor could
                     # notice the file's mtime before we've finished
                     # writing it.
                     shutil.copystat(tmpname, repo.wjoin(realname))
                     os.unlink(tmpname)
                 if tobackup:
                     os.rmdir(backupdir)
             except OSError:
                 pass
 
     def recordinwlock(ui, repo, message, match, opts):
         wlock = repo.wlock()
         try:
             return recordfunc(ui, repo, message, match, opts)
         finally:
             wlock.release()
 
     return commit(ui, repo, recordinwlock, pats, opts)
 
 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()
 
     allcmds = []
     for e in keys:
         aliases = parsealiases(e)
         allcmds.extend(aliases)
         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, allcmds
 
 def findcmd(cmd, table, strict=True):
     """Return (aliases, command table entry) for command string."""
     choice, allcmds = 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, allcmds)
 
 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, merge=True):
     if merge and 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(_('uncommitted changes'))
     ctx = repo[None]
     for s in sorted(ctx.substate):
         ctx.sub(s).bailifchanged()
 
 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 as inst:
             raise util.Abort(_("can't read commit message '%s': %s") %
                              (logfile, inst.strerror))
     return message
 
 def mergeeditform(ctxorbool, baseformname):
     """return appropriate editform name (referencing a committemplate)
 
     'ctxorbool' is either a ctx to be committed, or a bool indicating whether
     merging is committed.
 
     This returns baseformname with '.merge' appended if it is a merge,
     otherwise '.normal' is appended.
     """
     if isinstance(ctxorbool, bool):
         if ctxorbool:
             return baseformname + ".merge"
     elif 1 < len(ctxorbool.parents()):
         return baseformname + ".merge"
 
     return baseformname + ".normal"
 
 def getcommiteditor(edit=False, finishdesc=None, extramsg=None,
                     editform='', **opts):
     """get appropriate commit message editor according to '--edit' option
 
     'finishdesc' is a function to be called with edited commit message
     (= 'description' of the new changeset) just after editing, but
     before checking empty-ness. It should return actual text to be
     stored into history. This allows to change description before
     storing.
 
     'extramsg' is a extra message to be shown in the editor instead of
     'Leave message empty to abort commit' line. 'HG: ' prefix and EOL
     is automatically added.
 
     'editform' is a dot-separated list of names, to distinguish
     the purpose of commit text editing.
 
     'getcommiteditor' returns 'commitforceeditor' regardless of
     'edit', if one of 'finishdesc' or 'extramsg' is specified, because
     they are specific for usage in MQ.
     """
     if edit or finishdesc or extramsg:
         return lambda r, c, s: commitforceeditor(r, c, s,
                                                  finishdesc=finishdesc,
                                                  extramsg=extramsg,
                                                  editform=editform)
     elif editform:
         return lambda r, c, s: commiteditor(r, c, s, editform=editform)
     else:
         return commiteditor
 
 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 as 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', modemap=None,
                 pathname=None):
 
     writable = mode not in ('r', 'rb')
 
     if not pat or pat == '-':
         if writable:
             fp = repo.ui.fout
         else:
             fp = 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
     fn = makefilename(repo, pat, node, desc, total, seqno, revwidth, pathname)
     if modemap is not None:
         mode = modemap.get(fn, mode)
         if mode == 'wb':
             modemap[fn] = 'ab'
     return open(fn, mode)
 
 def openrevlog(repo, cmd, file_, opts):
     """opens the changelog, manifest, a filelog or a given revlog"""
     cl = opts['changelog']
     mf = opts['manifest']
     dir = opts['dir']
     msg = None
     if cl and mf:
         msg = _('cannot specify --changelog and --manifest at the same time')
     elif cl and dir:
         msg = _('cannot specify --changelog and --dir 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 or --dir '
                     'without a repository')
     if msg:
         raise util.Abort(msg)
 
     r = None
     if repo:
         if cl:
             r = repo.unfiltered().changelog
         elif dir:
             if 'treemanifest' not in repo.requirements:
                 raise util.Abort(_("--dir can only be used on repos with "
                                    "treemanifest enabled"))
             dirlog = repo.dirlog(file_)
             if len(dirlog):
                 r = dirlog
         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 = []
         if after:
             badstates = '?'
         else:
             badstates = '?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 = pathutil.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 as inst:
                 if inst.errno == errno.ENOENT:
                     ui.warn(_('%s: deleted in working directory\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 = pathutil.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 = pathutil.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.'''
 
     def writepid(pid):
         if opts['pid_file']:
             if appendpid:
                 mode = 'a'
             else:
                 mode = 'w'
             fp = open(opts['pid_file'], mode)
             fp.write(str(pid) + '\n')
             fp.close()
 
     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'))
             writepid(pid)
         finally:
             try:
                 os.unlink(lockpath)
             except OSError as e:
                 if e.errno != errno.ENOENT:
                     raise
         if parentfn:
             return parentfn(pid)
         else:
             return
 
     if initfn:
         initfn()
 
     if not opts['daemon']:
         writepid(os.getpid())
 
     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 tryimportone(ui, repo, hunk, parents, opts, msgs, updatefunc):
     """Utility function used by commands.import to import a single patch
 
     This function is explicitly defined here to help the evolve extension to
     wrap this part of the import logic.
 
     The API is currently a bit ugly because it a simple code translation from
     the import command. Feel free to make it better.
 
     :hunk: a patch (as a binary string)
     :parents: nodes that will be parent of the created commit
     :opts: the full dict of option passed to the import command
     :msgs: list to save commit message to.
            (used in case we need to save it when failing)
     :updatefunc: a function that update a repo to a given node
                  updatefunc(<repo>, <node>)
     """
     # avoid cycle context -> subrepo -> cmdutil
     import context
     tmpname, message, user, date, branch, nodeid, p1, p2 = \
         patch.extract(ui, hunk)
 
     update = not opts.get('bypass')
     strip = opts["strip"]
     prefix = opts["prefix"]
     sim = float(opts.get('similarity') or 0)
     if not tmpname:
         return (None, None, False)
     msg = _('applied to working directory')
 
     rejects = False
     dsguard = None
 
     try:
         cmdline_message = logmessage(ui, opts)
         if cmdline_message:
             # pickup the cmdline msg
             message = cmdline_message
         elif message:
             # pickup the patch msg
             message = message.strip()
         else:
             # launch the editor
             message = None
         ui.debug('message:\n%s\n' % message)
 
         if len(parents) == 1:
             parents.append(repo[nullid])
         if opts.get('exact'):
             if not nodeid or not p1:
                 raise util.Abort(_('not a Mercurial patch'))
             p1 = repo[p1]
             p2 = repo[p2 or nullid]
         elif p2:
             try:
                 p1 = repo[p1]
                 p2 = repo[p2]
                 # Without any options, consider p2 only if the
                 # patch is being applied on top of the recorded
                 # first parent.
                 if p1 != parents[0]:
                     p1 = parents[0]
                     p2 = repo[nullid]
             except error.RepoError:
                 p1, p2 = parents
             if p2.node() == nullid:
                 ui.warn(_("warning: import the patch as a normal revision\n"
                           "(use --exact to import the patch as a merge)\n"))
         else:
             p1, p2 = parents
 
         n = None
         if update:
             dsguard = dirstateguard(repo, 'tryimportone')
             if p1 != parents[0]:
                 updatefunc(repo, p1.node())
             if p2 != parents[1]:
                 repo.setparents(p1.node(), p2.node())
 
             if opts.get('exact') or opts.get('import_branch'):
                 repo.dirstate.setbranch(branch or 'default')
 
             partial = opts.get('partial', False)
             files = set()
             try:
                 patch.patch(ui, repo, tmpname, strip=strip, prefix=prefix,
                             files=files, eolmode=None, similarity=sim / 100.0)
             except patch.PatchError as e:
                 if not partial:
                     raise util.Abort(str(e))
                 if partial:
                     rejects = True
 
             files = list(files)
             if opts.get('no_commit'):
                 if message:
                     msgs.append(message)
             else:
                 if opts.get('exact') or p2:
                     # If you got here, you either use --force and know what
                     # you are doing or used --exact or a merge patch while
                     # being updated to its first parent.
                     m = None
                 else:
                     m = scmutil.matchfiles(repo, files or [])
                 editform = mergeeditform(repo[None], 'import.normal')
                 if opts.get('exact'):
                     editor = None
                 else:
                     editor = getcommiteditor(editform=editform, **opts)
                 allowemptyback = repo.ui.backupconfig('ui', 'allowemptycommit')
                 try:
                     if partial:
                         repo.ui.setconfig('ui', 'allowemptycommit', True)
                     n = repo.commit(message, opts.get('user') or user,
                                     opts.get('date') or date, match=m,
                                     editor=editor)
                 finally:
                     repo.ui.restoreconfig(allowemptyback)
             dsguard.close()
         else:
             if opts.get('exact') or opts.get('import_branch'):
                 branch = branch or 'default'
             else:
                 branch = p1.branch()
             store = patch.filestore()
             try:
                 files = set()
                 try:
                     patch.patchrepo(ui, repo, p1, store, tmpname, strip, prefix,
                                     files, eolmode=None)
                 except patch.PatchError as e:
                     raise util.Abort(str(e))
                 if opts.get('exact'):
                     editor = None
                 else:
                     editor = getcommiteditor(editform='import.bypass')
                 memctx = context.makememctx(repo, (p1.node(), p2.node()),
                                             message,
                                             opts.get('user') or user,
                                             opts.get('date') or date,
                                             branch, files, store,
                                             editor=editor)
                 n = memctx.commit()
             finally:
                 store.close()
         if opts.get('exact') and opts.get('no_commit'):
             # --exact with --no-commit is still useful in that it does merge
             # and branch bits
             ui.warn(_("warning: can't check exact import with --no-commit\n"))
         elif opts.get('exact') and hex(n) != nodeid:
             raise util.Abort(_('patch is damaged or loses information'))
         if n:
             # i18n: refers to a short changeset id
             msg = _('created %s') % short(n)
         return (msg, n, rejects)
     finally:
         lockmod.release(dsguard)
         os.unlink(tmpname)
 
 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])
     filemode = {}
 
     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()
 
         if parents:
             prev = parents[0]
         else:
             prev = 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='wb',
                              modemap=filemode)
             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())
         write("#      %s\n" % util.datestr(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='',
                    root='', listsubrepos=False):
     '''show diff or diffstat.'''
     if fp is None:
         write = ui.write
     else:
         def write(s, **kw):
             fp.write(s)
 
     if root:
         relroot = pathutil.canonpath(repo.root, repo.getcwd(), root)
     else:
         relroot = ''
     if relroot != '':
         # XXX relative roots currently don't work if the root is within a
         # subrepo
         uirelroot = match.uipath(relroot)
         relroot += '/'
         for matchroot in match.files():
             if not matchroot.startswith(relroot):
                 ui.warn(_('warning: %s not inside relative root %s\n') % (
                     match.uipath(matchroot), uirelroot))
 
     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, relroot=relroot)
         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,
                                          relroot=relroot):
             write(chunk, label=label)
 
     if listsubrepos:
         ctx1 = repo[node1]
         ctx2 = repo[node2]
         for subpath, sub in scmutil.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(ui, 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, matchfn, diffopts, buffered):
         self.ui = ui
         self.repo = repo
         self.buffered = buffered
         self.matchfn = matchfn
         self.diffopts = diffopts
         self.header = {}
         self.hunk = {}
         self.lastheader = None
         self.footer = None
 
     def flush(self, ctx):
         rev = ctx.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.debugflag:
             hexfunc = hex
         else:
             hexfunc = short
         # as of now, wctx.node() and wctx.rev() return None, but we want to
         # show the same values as {node} and {rev} templatekw
         revnode = (scmutil.intrev(rev), hexfunc(bin(ctx.hex())))
 
         if self.ui.quiet:
             self.ui.write("%d:%s\n" % revnode, label='log.node')
             return
 
         date = util.datestr(ctx.date())
 
         # i18n: column positioning for "hg log"
         self.ui.write(_("changeset:   %d:%s\n") % revnode,
                       label='log.changeset changeset.%s' % ctx.phasestr())
 
         # branches are shown first before any other names due to backwards
         # compatibility
         branch = ctx.branch()
         # don't show the default branch name
         if branch != 'default':
             # i18n: column positioning for "hg log"
             self.ui.write(_("branch:      %s\n") % branch,
                           label='log.branch')
 
         for name, ns in self.repo.names.iteritems():
             # branches has special logic already handled above, so here we just
             # skip it
             if name == 'branches':
                 continue
             # we will use the templatename as the color name since those two
             # should be the same
             for name in ns.names(self.repo, changenode):
                 self.ui.write(ns.logfmt % name,
                               label='log.%s' % ns.colorname)
         if self.ui.debugflag:
             # i18n: column positioning for "hg log"
             self.ui.write(_("phase:       %s\n") % ctx.phasestr(),
                           label='log.phase')
         for pctx in self._meaningful_parentrevs(ctx):
             label = 'log.parent changeset.%s' % pctx.phasestr()
             # i18n: column positioning for "hg log"
             self.ui.write(_("parent:      %d:%s\n")
                           % (pctx.rev(), hexfunc(pctx.node())),
                           label=label)
 
         if self.ui.debugflag and rev is not None:
             mnode = ctx.manifestnode()
             # i18n: column positioning for "hg log"
             self.ui.write(_("manifest:    %d:%s\n") %
                           (self.repo.manifest.rev(mnode), hex(mnode)),
                           label='ui.debug log.manifest')
         # i18n: column positioning for "hg log"
         self.ui.write(_("user:        %s\n") % ctx.user(),
                       label='log.user')
         # i18n: column positioning for "hg log"
         self.ui.write(_("date:        %s\n") % date,
                       label='log.date')
 
         if self.ui.debugflag:
             files = ctx.p1().status(ctx)[:3]
             for key, value in zip([# i18n: column positioning for "hg log"
                                    _("files:"),
                                    # i18n: column positioning for "hg log"
                                    _("files+:"),
                                    # i18n: column positioning for "hg log"
                                    _("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:
             # i18n: column positioning for "hg log"
             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]
             # i18n: column positioning for "hg log"
             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()):
                 # i18n: column positioning for "hg log"
                 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:
                 # i18n: column positioning for "hg log"
                 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.matchfn
         if matchfn:
             stat = self.diffopts.get('stat')
             diff = self.diffopts.get('patch')
             diffopts = patch.diffallopts(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, ctx):
         """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 = ctx.parents()
         if len(parents) > 1:
             return parents
         if self.ui.debugflag:
             return [parents[0], self.repo['null']]
         if parents[0].rev() >= scmutil.intrev(ctx.rev()) - 1:
             return []
         return parents
 
 class jsonchangeset(changeset_printer):
     '''format changeset information.'''
 
     def __init__(self, ui, repo, matchfn, diffopts, buffered):
         changeset_printer.__init__(self, ui, repo, matchfn, diffopts, buffered)
         self.cache = {}
         self._first = True
 
     def close(self):
         if not self._first:
             self.ui.write("\n]\n")
         else:
             self.ui.write("[]\n")
 
     def _show(self, ctx, copies, matchfn, props):
         '''show a single changeset or file revision'''
         rev = ctx.rev()
         if rev is None:
             jrev = jnode = 'null'
         else:
             jrev = str(rev)
             jnode = '"%s"' % hex(ctx.node())
         j = encoding.jsonescape
 
         if self._first:
             self.ui.write("[\n {")
             self._first = False
         else:
             self.ui.write(",\n {")
 
         if self.ui.quiet:
             self.ui.write('\n  "rev": %s' % jrev)
             self.ui.write(',\n  "node": %s' % jnode)
             self.ui.write('\n }')
             return
 
         self.ui.write('\n  "rev": %s' % jrev)
         self.ui.write(',\n  "node": %s' % jnode)
         self.ui.write(',\n  "branch": "%s"' % j(ctx.branch()))
         self.ui.write(',\n  "phase": "%s"' % ctx.phasestr())
         self.ui.write(',\n  "user": "%s"' % j(ctx.user()))
         self.ui.write(',\n  "date": [%d, %d]' % ctx.date())
         self.ui.write(',\n  "desc": "%s"' % j(ctx.description()))
 
         self.ui.write(',\n  "bookmarks": [%s]' %
                       ", ".join('"%s"' % j(b) for b in ctx.bookmarks()))
         self.ui.write(',\n  "tags": [%s]' %
                       ", ".join('"%s"' % j(t) for t in ctx.tags()))
         self.ui.write(',\n  "parents": [%s]' %
                       ", ".join('"%s"' % c.hex() for c in ctx.parents()))
 
         if self.ui.debugflag:
             if rev is None:
                 jmanifestnode = 'null'
             else:
                 jmanifestnode = '"%s"' % hex(ctx.manifestnode())
             self.ui.write(',\n  "manifest": %s' % jmanifestnode)
 
             self.ui.write(',\n  "extra": {%s}' %
                           ", ".join('"%s": "%s"' % (j(k), j(v))
                                     for k, v in ctx.extra().items()))
 
             files = ctx.p1().status(ctx)
             self.ui.write(',\n  "modified": [%s]' %
                           ", ".join('"%s"' % j(f) for f in files[0]))
             self.ui.write(',\n  "added": [%s]' %
                           ", ".join('"%s"' % j(f) for f in files[1]))
             self.ui.write(',\n  "removed": [%s]' %
                           ", ".join('"%s"' % j(f) for f in files[2]))
 
         elif self.ui.verbose:
             self.ui.write(',\n  "files": [%s]' %
                           ", ".join('"%s"' % j(f) for f in ctx.files()))
 
             if copies:
                 self.ui.write(',\n  "copies": {%s}' %
                               ", ".join('"%s": "%s"' % (j(k), j(v))
                                                         for k, v in copies))
 
         matchfn = self.matchfn
         if matchfn:
             stat = self.diffopts.get('stat')
             diff = self.diffopts.get('patch')
             diffopts = patch.difffeatureopts(self.ui, self.diffopts, git=True)
             node, prev = ctx.node(), ctx.p1().node()
             if stat:
                 self.ui.pushbuffer()
                 diffordiffstat(self.ui, self.repo, diffopts, prev, node,
                                match=matchfn, stat=True)
                 self.ui.write(',\n  "diffstat": "%s"' % j(self.ui.popbuffer()))
             if diff:
                 self.ui.pushbuffer()
                 diffordiffstat(self.ui, self.repo, diffopts, prev, node,
                                match=matchfn, stat=False)
                 self.ui.write(',\n  "diff": "%s"' % j(self.ui.popbuffer()))
 
         self.ui.write("\n }")
 
 class changeset_templater(changeset_printer):
     '''format changeset information.'''
 
     def __init__(self, ui, repo, matchfn, diffopts, tmpl, mapfile, buffered):
         changeset_printer.__init__(self, ui, repo, matchfn, 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)
         if tmpl:
             self.t.cache['changeset'] = tmpl
 
         self.cache = {}
 
         # find correct templates for current mode
         tmplmodes = [
             (True, None),
             (self.ui.verbose, 'verbose'),
             (self.ui.quiet, 'quiet'),
             (self.ui.debugflag, 'debug'),
         ]
 
-        self._parts = {'header': '', 'footer': '', 'changeset': 'changeset'}
+        self._parts = {'header': '', 'footer': '', 'changeset': 'changeset',
+                       'docheader': '', 'docfooter': ''}
         for mode, postfix in tmplmodes:
             for t in self._parts:
                 cur = t
                 if postfix:
                     cur += "_" + postfix
                 if mode and cur in self.t:
                     self._parts[t] = cur
 
+        if self._parts['docheader']:
+            self.ui.write(templater.stringify(self.t(self._parts['docheader'])))
+
+    def close(self):
+        if self._parts['docfooter']:
+            if not self.footer:
+                self.footer = ""
+            self.footer += templater.stringify(self.t(self._parts['docfooter']))
+        return super(changeset_templater, self).close()
+
     def _show(self, ctx, copies, matchfn, props):
         '''show a single changeset or file revision'''
 
         showlist = templatekw.showlist
 
         # showparents() behavior depends on ui trace level which
         # causes unexpected behaviors at templating level and makes
         # it harder to extract it in a standalone function. Its
         # behavior cannot be changed so leave it here for now.
         def showparents(**args):
             ctx = args['ctx']
             parents = [[('rev', p.rev()),
                         ('node', p.hex()),
                         ('phase', p.phasestr())]
                        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
 
         try:
             # write header
             if self._parts['header']:
                 h = templater.stringify(self.t(self._parts['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 = self._parts['changeset']
             self.ui.write(templater.stringify(self.t(key, **props)))
             self.showpatch(ctx.node(), matchfn)
 
             if self._parts['footer']:
                 if not self.footer:
                     self.footer = templater.stringify(
                         self.t(self._parts['footer'], **props))
         except KeyError as inst:
             msg = _("%s: no key named '%s'")
             raise util.Abort(msg % (self.t.mapfile, inst.args[0]))
         except SyntaxError as inst:
             raise util.Abort('%s: %s' % (self.t.mapfile, inst.args[0]))
 
 def gettemplate(ui, tmpl, style):
     """
     Find the template matching the given template spec or style.
     """
 
     # ui settings
     if not tmpl and not style: # template are stronger than style
         tmpl = ui.config('ui', 'logtemplate')
         if tmpl:
             try:
                 tmpl = templater.unquotestring(tmpl)
             except SyntaxError:
                 pass
             return tmpl, None
         else:
             style = util.expandpath(ui.config('ui', 'style', ''))
 
     if not tmpl and style:
         mapfile = style
         if not os.path.split(mapfile)[0]:
             mapname = (templater.templatepath('map-cmdline.' + mapfile)
                        or templater.templatepath(mapfile))
             if mapname:
                 mapfile = mapname
         return None, mapfile
 
     if not tmpl:
         return None, None
 
     return formatter.lookuptemplate(ui, 'changeset', tmpl)
 
 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
     matchfn = None
     if opts.get('patch') or opts.get('stat'):
         matchfn = scmutil.matchall(repo)
 
     if opts.get('template') == 'json':
         return jsonchangeset(ui, repo, matchfn, opts, buffered)
 
     tmpl, mapfile = gettemplate(ui, opts.get('template'), opts.get('style'))
 
     if not tmpl and not mapfile:
         return changeset_printer(ui, repo, matchfn, opts, buffered)
 
     try:
         t = changeset_templater(ui, repo, matchfn, opts, tmpl, mapfile,
                                 buffered)
     except SyntaxError as inst:
         raise util.Abort(inst.args[0])
     return t
 
 def showmarker(ui, marker):
     """utility function to display obsolescence marker in a readable way
 
     To be used by debug function."""
     ui.write(hex(marker.precnode()))
     for repl in marker.succnodes():
         ui.write(' ')
         ui.write(hex(repl))
     ui.write(' %X ' % marker.flags())
     parents = marker.parentnodes()
     if parents is not None:
         ui.write('{%s} ' % ', '.join(hex(p) for p in parents))
     ui.write('(%s) ' % util.datestr(marker.date()))
     ui.write('{%s}' % (', '.join('%r: %r' % t for t in
                                  sorted(marker.metadata().items())
                                  if t[0] != 'date')))
     ui.write('\n')
 
 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(windowsize=8, sizelimit=512):
     while True:
         yield windowsize
         if windowsize < sizelimit:
             windowsize *= 2
 
 class FileWalkError(Exception):
     pass
 
 def walkfilerevs(repo, match, follow, revs, fncache):
     '''Walks the file history for the matched files.
 
     Returns the changeset revs that are involved in the file history.
 
     Throws FileWalkError if the file history can't be walked using
     filelogs alone.
     '''
     wanted = set()
     copies = []
     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_)
                 raise FileWalkError("Cannot walk via filelog")
             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)
 
     return wanted
 
 class _followfilter(object):
     def __init__(self, repo, onlyfirst=False):
         self.repo = repo
         self.startrev = nullrev
         self.roots = set()
         self.onlyfirst = onlyfirst
 
     def match(self, rev):
         def realparents(rev):
             if self.onlyfirst:
                 return self.repo.changelog.parentrevs(rev)[0:1]
             else:
                 return filter(lambda x: x != nullrev,
                               self.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
 
 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')
     revs = _logrevs(repo, opts)
     if not revs:
         return []
     wanted = set()
     slowpath = match.anypats() or ((match.isexact() or match.prefix()) 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 match.always():
         # No files, no patterns.  Display all revs.
         wanted = revs
     elif not slowpath:
         # We only have to read through the filelog to find wanted revisions
 
         try:
             wanted = walkfilerevs(repo, match, follow, revs, fncache)
         except FileWalkError:
             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, otherwise simply return
             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.
         # This is really slow on large repos, so compute the set lazily.
         class lazywantedset(object):
             def __init__(self):
                 self.set = set()
                 self.revs = set(revs)
 
             # No need to worry about locality here because it will be accessed
             # in the same order as the increasing window below.
             def __contains__(self, value):
                 if value in self.set:
                     return True
                 elif not value in self.revs:
                     return False
                 else:
                     self.revs.discard(value)
                     ctx = change(value)
                     matches = filter(match, ctx.files())
                     if matches:
                         fncache[value] = matches
                         self.set.add(value)
                         return True
                     return False
 
             def discard(self, value):
                 self.revs.discard(value)
                 self.set.discard(value)
 
         wanted = lazywantedset()
 
     # 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(repo)
         stop = min(revs[0], revs[-1])
         for x in xrange(rev, stop - 1, -1):
             if ff.match(x):
                 wanted = wanted - [x]
 
     # Now that wanted is correctly initialized, we can iterate over the
     # revision range, yielding only revisions in wanted.
     def iterate():
         if follow and match.always():
             ff = _followfilter(repo, onlyfirst=opts.get('follow_first'))
             def want(rev):
                 return ff.match(rev) and rev in wanted
         else:
             def want(rev):
                 return rev in wanted
 
         it = iter(revs)
         stopiteration = False
         for windowsize in increasingwindows():
             nrevs = []
             for i in xrange(windowsize):
                 rev = next(it, None)
                 if rev is None:
                     stopiteration = True
                     break
                 elif want(rev):
                     nrevs.append(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)
 
             if stopiteration:
                 break
 
     return iterate()
 
 def _makefollowlogfilematcher(repo, files, 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['.']
 
     def populate():
         for fn in files:
             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.matchfiles(repo, fcache.get(rev, []))
 
     return filematcher
 
 def _makenofollowlogfilematcher(repo, pats, opts):
     '''hook for extensions to override the filematcher for non-follow cases'''
     return None
 
 def _makelogrevset(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')
     if opts.get('follow_first'):
         followfirst = 1
     else:
         followfirst = 0
     # --follow with FILE behavior depends on revs...
     it = iter(revs)
     startrev = it.next()
     followdescendants = startrev < next(it, startrev)
 
     # 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).
     wctx = repo[None]
     match, pats = scmutil.matchandpats(wctx, pats, opts)
     slowpath = match.anypats() or ((match.isexact() or match.prefix()) and
                                    opts.get('removed'))
     if not slowpath:
         for f in match.files():
             if follow and f not in wctx:
                 # If the file exists, it may be a directory, so let it
                 # take the slow path.
                 if os.path.exists(repo.wjoin(f)):
                     slowpath = True
                     continue
                 else:
                     raise util.Abort(_('cannot follow file not in parent '
                                        'revision: "%s"') % f)
             filelog = repo.file(f)
             if not 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
 
     fpats = ('_patsfollow', '_patsfollowfirst')
     fnopats = (('_ancestors', '_fancestors'),
                ('_descendants', '_fdescendants'))
     if slowpath:
         # See walkchangerevs() slow path.
         #
         # 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
         if follow:
             opts[fnopats[0][followfirst]] = '.'
     else:
         if follow:
             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:
                 op = fnopats[followdescendants][followfirst]
                 opts[op] = 'rev(%d)' % startrev
         else:
             opts['_patslog'] = list(pats)
 
     filematcher = None
     if opts.get('patch') or opts.get('stat'):
         # When following files, track renames via a special matcher.
         # If we're forced to take the slowpath it means we're following
         # at least one pattern/directory, so don't bother with rename tracking.
         if follow and not match.always() and not slowpath:
             # _makefollowlogfilematcher expects its files argument to be
             # relative to the repo root, so use match.files(), not pats.
             filematcher = _makefollowlogfilematcher(repo, match.files(),
                                                     followfirst)
         else:
             filematcher = _makenofollowlogfilematcher(repo, pats, opts)
             if filematcher is None:
                 filematcher = lambda rev: match
 
     expr = []
     for op, val in sorted(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 _logrevs(repo, opts):
     # Default --rev value depends on --follow but --follow behavior
     # 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'])
     elif follow and repo.dirstate.p1() == nullid:
         revs = revset.baseset()
     elif follow:
         revs = repo.revs('reverse(:.)')
     else:
         revs = revset.spanset(repo)
         revs.reverse()
     return revs
 
 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.
     """
     limit = loglimit(opts)
     revs = _logrevs(repo, opts)
     if not revs:
         return revset.baseset(), None, None
     expr, filematcher = _makelogrevset(repo, pats, opts, revs)
     if opts.get('rev'):
         # User-specified revs might be unsorted, but don't sort before
         # _makelogrevset because it might depend on the order of revs
         revs.sort(reverse=True)
     if expr:
         # Revset matchers often operate faster on revisions in changelog
         # order, because most filters deal with the changelog.
         revs.reverse()
         matcher = revset.match(repo.ui, expr)
         # Revset matches can reorder revisions. "A or B" typically returns
         # returns the revision matching A then the revision matching B. Sort
         # again to fix that.
         revs = matcher(repo, revs)
         revs.sort(reverse=True)
     if limit is not None:
         limitedrevs = []
         for idx, rev in enumerate(revs):
             if idx >= limit:
                 break
             limitedrevs.append(rev)
         revs = revset.baseset(limitedrevs)
 
     return revs, expr, filematcher
 
 def getlogrevs(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.
     """
     limit = loglimit(opts)
     revs = _logrevs(repo, opts)
     if not revs:
         return revset.baseset([]), None, None
     expr, filematcher = _makelogrevset(repo, pats, opts, revs)
     if expr:
         # Revset matchers often operate faster on revisions in changelog
         # order, because most filters deal with the changelog.
         if not opts.get('rev'):
             revs.reverse()
         matcher = revset.match(repo.ui, expr)
         # Revset matches can reorder revisions. "A or B" typically returns
         # returns the revision matching A then the revision matching B. Sort
         # again to fix that.
         revs = matcher(repo, revs)
         if not opts.get('rev'):
             revs.sort(reverse=True)
     if limit is not None:
         limitedrevs = []
         for idx, r in enumerate(revs):
             if limit <= idx:
                 break
             limitedrevs.append(r)
         revs = revset.baseset(limitedrevs)
 
     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'
         elif ctx.closesbranch():
             char = '_'
         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(ctx)
         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)
     revdag = graphmod.dagwalker(repo, revs)
 
     getrenamed = None
     if opts.get('copies'):
         endrev = None
         if opts.get('rev'):
             endrev = scmutil.revrange(repo, opts.get('rev')).max() + 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, prefix, explicitonly, **opts):
     join = lambda f: os.path.join(prefix, f)
     bad = []
 
     badfn = lambda x, y: bad.append(x) or match.bad(x, y)
     names = []
     wctx = repo[None]
     cca = None
     abort, warn = scmutil.checkportabilityalert(ui)
     if abort or warn:
         cca = scmutil.casecollisionauditor(ui, abort, repo.dirstate)
 
     badmatch = matchmod.badmatch(match, badfn)
     dirstate = repo.dirstate
     # We don't want to just call wctx.walk here, since it would return a lot of
     # clean files, which we aren't interested in and takes time.
     for f in sorted(dirstate.walk(badmatch, sorted(wctx.substate),
                                   True, False, full=False)):
         exact = match.exact(f)
         if exact or not explicitonly and f not in wctx and repo.wvfs.lexists(f):
             if cca:
                 cca(f)
             names.append(f)
             if ui.verbose or not exact:
                 ui.status(_('adding %s\n') % match.rel(f))
 
     for subpath in sorted(wctx.substate):
         sub = wctx.sub(subpath)
         try:
             submatch = matchmod.narrowmatcher(subpath, match)
             if opts.get('subrepos'):
                 bad.extend(sub.add(ui, submatch, prefix, False, **opts))
             else:
                 bad.extend(sub.add(ui, submatch, prefix, True, **opts))
         except error.LookupError:
             ui.status(_("skipping missing subrepository: %s\n")
                            % join(subpath))
 
     if not opts.get('dry_run'):
         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 = []
     badfn = lambda x, y: bad.append(x) or match.bad(x, y)
     wctx = repo[None]
     forgot = []
 
     s = repo.status(match=matchmod.badmatch(match, badfn), 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 sorted(wctx.substate):
         sub = wctx.sub(subpath)
         try:
             submatch = matchmod.narrowmatcher(subpath, match)
             subbad, subforgot = sub.forget(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 repo.wvfs.isdir(f):
                 if f not in forgot:
                     if repo.wvfs.exists(f):
                         # Don't complain if the exact case match wasn't given.
                         # But don't do this until after checking 'forgot', so
                         # that subrepo files aren't normalized, and this op is
                         # purely from data cached by the status walk above.
                         if repo.dirstate.normalize(f) in repo.dirstate:
                             continue
                         ui.warn(_('not removing %s: '
                                   'file is already untracked\n')
                                 % match.rel(f))
                     bad.append(f)
 
     for f in forget:
         if ui.verbose or not match.exact(f):
             ui.status(_('removing %s\n') % match.rel(f))
 
     rejected = wctx.forget(forget, prefix)
     bad.extend(f for f in rejected if f in match.files())
     forgot.extend(f for f in forget if f not in rejected)
     return bad, forgot
 
 def files(ui, ctx, m, fm, fmt, subrepos):
     rev = ctx.rev()
     ret = 1
     ds = ctx.repo().dirstate
 
     for f in ctx.matches(m):
         if rev is None and ds[f] == 'r':
             continue
         fm.startitem()
         if ui.verbose:
             fc = ctx[f]
             fm.write('size flags', '% 10d % 1s ', fc.size(), fc.flags())
         fm.data(abspath=f)
         fm.write('path', fmt, m.rel(f))
         ret = 0
 
     for subpath in sorted(ctx.substate):
         def matchessubrepo(subpath):
             return (m.always() or m.exact(subpath)
                     or any(f.startswith(subpath + '/') for f in m.files()))
 
         if subrepos or matchessubrepo(subpath):
             sub = ctx.sub(subpath)
             try:
                 submatch = matchmod.narrowmatcher(subpath, m)
                 if sub.printfiles(ui, submatch, fm, fmt, subrepos) == 0:
                     ret = 0
             except error.LookupError:
                 ui.status(_("skipping missing subrepository: %s\n")
                                % m.abs(subpath))
 
     return ret
 
 def remove(ui, repo, m, prefix, after, force, subrepos):
     join = lambda f: os.path.join(prefix, f)
     ret = 0
     s = repo.status(match=m, clean=True)
     modified, added, deleted, clean = s[0], s[1], s[3], s[6]
 
     wctx = repo[None]
 
     for subpath in sorted(wctx.substate):
         def matchessubrepo(matcher, subpath):
             if matcher.exact(subpath):
                 return True
             for f in matcher.files():
                 if f.startswith(subpath):
                     return True
             return False
 
         if subrepos or matchessubrepo(m, subpath):
             sub = wctx.sub(subpath)
             try:
                 submatch = matchmod.narrowmatcher(subpath, m)
                 if sub.removefiles(submatch, prefix, after, force, subrepos):
                     ret = 1
             except error.LookupError:
                 ui.status(_("skipping missing subrepository: %s\n")
                                % join(subpath))
 
     # warn about failure to delete explicit files/dirs
     deleteddirs = util.dirs(deleted)
     for f in m.files():
         def insubrepo():
             for subpath in wctx.substate:
                 if f.startswith(subpath):
                     return True
             return False
 
         isdir = f in deleteddirs or wctx.hasdir(f)
         if f in repo.dirstate or isdir or f == '.' or insubrepo():
             continue
 
         if repo.wvfs.exists(f):
             if repo.wvfs.isdir(f):
                 ui.warn(_('not removing %s: no tracked files\n')
                         % m.rel(f))
             else:
                 ui.warn(_('not removing %s: file is untracked\n')
                         % m.rel(f))
         # missing files will generate a warning elsewhere
         ret = 1
 
     if force:
         list = modified + deleted + clean + added
     elif after:
         list = deleted
         for f in modified + added + clean:
             ui.warn(_('not removing %s: file still exists\n') % m.rel(f))
             ret = 1
     else:
         list = deleted + clean
         for f in modified:
             ui.warn(_('not removing %s: file is modified (use -f'
                       ' to force removal)\n') % m.rel(f))
             ret = 1
         for f in added:
             ui.warn(_('not removing %s: file has been marked for add'
                       ' (use forget to undo)\n') % m.rel(f))
             ret = 1
 
     for f in sorted(list):
         if ui.verbose or not m.exact(f):
             ui.status(_('removing %s\n') % m.rel(f))
 
     wlock = repo.wlock()
     try:
         if not after:
             for f in list:
                 if f in added:
                     continue # we never unlink added files on remove
                 util.unlinkpath(repo.wjoin(f), ignoremissing=True)
         repo[None].forget(list)
     finally:
         wlock.release()
 
     return ret
 
 def cat(ui, repo, ctx, matcher, prefix, **opts):
     err = 1
 
     def write(path):
         fp = makefileobj(repo, opts.get('output'), ctx.node(),
                          pathname=os.path.join(prefix, path))
         data = ctx[path].data()
         if opts.get('decode'):
             data = repo.wwritedata(path, data)
         fp.write(data)
         fp.close()
 
     # Automation often uses hg cat on single files, so special case it
     # for performance to avoid the cost of parsing the manifest.
     if len(matcher.files()) == 1 and not matcher.anypats():
         file = matcher.files()[0]
         mf = repo.manifest
         mfnode = ctx.manifestnode()
         if mfnode and mf.find(mfnode, file)[0]:
             write(file)
             return 0
 
     # Don't warn about "missing" files that are really in subrepos
     def badfn(path, msg):
         for subpath in ctx.substate:
             if path.startswith(subpath):
                 return
         matcher.bad(path, msg)
 
     for abs in ctx.walk(matchmod.badmatch(matcher, badfn)):
         write(abs)
         err = 0
 
     for subpath in sorted(ctx.substate):
         sub = ctx.sub(subpath)
         try:
             submatch = matchmod.narrowmatcher(subpath, matcher)
 
             if not sub.cat(submatch, os.path.join(prefix, sub._path),
                            **opts):
                 err = 0
         except error.RepoLookupError:
             ui.status(_("skipping missing subrepository: %s\n")
                            % os.path.join(prefix, subpath))
 
     return err
 
 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)
     matcher = scmutil.match(repo[None], pats, opts)
 
     # extract addremove carefully -- this function can be called from a command
     # that doesn't support addremove
     if opts.get('addremove'):
         if scmutil.addremove(repo, matcher, "", opts) != 0:
             raise util.Abort(
                 _("failed to mark all new/missing files as added/removed"))
 
     return commitfunc(ui, repo, message, matcher, opts)
 
 def amend(ui, repo, commitfunc, old, extra, pats, opts):
     # avoid cycle context -> subrepo -> cmdutil
     import context
 
     # amend will reuse the existing user if not specified, but the obsolete
     # marker creation requires that the current user's name is specified.
     if obsolete.isenabled(repo, obsolete.createmarkersopt):
         ui.username() # raise exception if username not set
 
     ui.note(_('amending changeset %s\n') % old)
     base = old.p1()
     createmarkers = obsolete.isenabled(repo, obsolete.createmarkersopt)
 
     wlock = dsguard = lock = newid = None
     try:
         wlock = repo.wlock()
         dsguard = dirstateguard(repo, 'amend')
         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)
             # ensure logfile does not conflict with later enforcement of the
             # message. potential logfile content has been processed by
             # `logmessage` anyway.
             opts.pop('logfile')
             # First, do a regular commit to record all changes in the working
             # directory (if there are any)
             ui.callhooks = False
             activebookmark = repo._activebookmark
             try:
                 repo._activebookmark = None
                 opts['message'] = 'temporary amend commit for %s' % old
                 node = commit(ui, repo, commitfunc, pats, opts)
             finally:
                 repo._activebookmark = activebookmark
                 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())
 
             if len(old.parents()) > 1:
                 # ctx.files() isn't reliable for merges, so fall back to the
                 # slower repo.status() method
                 files = set([fn for st in repo.status(base, old)[:3]
                              for fn in st])
             else:
                 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)
                 if old.p2:
                     copied.update(copies.pathcopies(old.p2(), 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(repo,
                                                   fctx.path(), fctx.data(),
                                                   islink='l' in flags,
                                                   isexec='x' in flags,
                                                   copied=copied.get(path))
                         return mctx
                     except KeyError:
                         return None
             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:
                         return None
 
                 user = opts.get('user') or old.user()
                 date = opts.get('date') or old.date()
             editform = mergeeditform(old, 'commit.amend')
             editor = getcommiteditor(editform=editform, **opts)
             if not message:
                 editor = getcommiteditor(edit=True, editform=editform)
                 message = old.description()
 
             pureextra = extra.copy()
             extra['amend_source'] = old.hex()
 
             new = context.memctx(repo,
                                  parents=[base.node(), old.p2().node()],
                                  text=message,
                                  files=files,
                                  filectxfn=filectxfn,
                                  user=user,
                                  date=date,
                                  extra=extra,
                                  editor=editor)
 
             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:
                 if opts.get('secret'):
                     commitphase = 'secret'
                 else:
                     commitphase = old.phase()
                 repo.ui.setconfig('phases', 'new-commit', commitphase, 'amend')
                 newid = repo.commitctx(new)
             finally:
                 repo.ui.setconfig('phases', 'new-commit', ph, 'amend')
             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:
                     marks = repo._bookmarks
                     for bm in bms:
                         ui.debug('moving bookmarks %r from %s to %s\n' %
                                  (marks, old.hex(), hex(newid)))
                         marks[bm] = newid
                     marks.recordchange(tr)
                 #commit the whole amend process
                 if createmarkers:
                     # mark the new changeset as successor of the rewritten one
                     new = repo[newid]
                     obs = [(old, (new,))]
                     if node:
                         obs.append((ctx, ()))
 
                     obsolete.createmarkers(repo, obs)
             tr.close()
         finally:
             tr.release()
         dsguard.close()
         if not createmarkers 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(lock, dsguard, wlock)
     return newid
 
 def commiteditor(repo, ctx, subs, editform=''):
     if ctx.description():
         return ctx.description()
     return commitforceeditor(repo, ctx, subs, editform=editform)
 
 def commitforceeditor(repo, ctx, subs, finishdesc=None, extramsg=None,
                       editform=''):
     if not extramsg:
         extramsg = _("Leave message empty to abort commit.")
 
     forms = [e for e in editform.split('.') if e]
     forms.insert(0, 'changeset')
     while forms:
         tmpl = repo.ui.config('committemplate', '.'.join(forms))
         if tmpl:
             committext = buildcommittemplate(repo, ctx, subs, extramsg, tmpl)
             break
         forms.pop()
     else:
         committext = buildcommittext(repo, ctx, subs, extramsg)
 
     # run editor in the repository root
     olddir = os.getcwd()
     os.chdir(repo.root)
     text = repo.ui.edit(committext, ctx.user(), ctx.extra(), editform=editform)
     text = re.sub("(?m)^HG:.*(\n|$)", "", text)
     os.chdir(olddir)
 
     if finishdesc:
         text = finishdesc(text)
     if not text.strip():
         raise util.Abort(_("empty commit message"))
 
     return text
 
 def buildcommittemplate(repo, ctx, subs, extramsg, tmpl):
     ui = repo.ui
     tmpl, mapfile = gettemplate(ui, tmpl, None)
 
     try:
         t = changeset_templater(ui, repo, None, {}, tmpl, mapfile, False)
     except SyntaxError as inst:
         raise util.Abort(inst.args[0])
 
     for k, v in repo.ui.configitems('committemplate'):
         if k != 'changeset':
             t.t.cache[k] = v
 
     if not extramsg:
         extramsg = '' # ensure that extramsg is string
 
     ui.pushbuffer()
     t.show(ctx, extramsg=extramsg)
     return ui.popbuffer()
 
 def buildcommittext(repo, ctx, subs, extramsg):
     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: %s" % extramsg)
     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())
     if bookmarks.isactivewdirparent(repo):
         edittext.append(_("HG: bookmark '%s'") % repo._activebookmark)
     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("")
 
     return "\n".join(edittext)
 
 def commitstatus(repo, node, branch, bheads=None, opts={}):
     ctx = repo[node]
     parents = ctx.parents()
 
     if (not opts.get('amend') and bheads and node not in bheads and not
         [x for x in parents if x.node() in bheads and x.branch() == branch]):
         repo.ui.status(_('created new head\n'))
         # The message is not printed for initial roots. For the other
         # changesets, it is printed in the following situations:
         #
         # Par column: for the 2 parents with ...
         #   N: null or no parent
         #   B: parent is on another named branch
         #   C: parent is a regular non head changeset
         #   H: parent was a branch head of the current branch
         # Msg column: whether we print "created new head" message
         # In the following, it is assumed that there already exists some
         # initial branch heads of the current branch, otherwise nothing is
         # printed anyway.
         #
         # Par Msg Comment
         # N N  y  additional topo root
         #
         # B N  y  additional branch root
         # C N  y  additional topo head
         # H N  n  usual case
         #
         # B B  y  weird additional branch root
         # C B  y  branch merge
         # H B  n  merge with named branch
         #
         # C C  y  additional head from merge
         # C H  n  merge with a head
         #
         # H H  n  head merge: head count decreases
 
     if not opts.get('close_branch'):
         for r in parents:
             if r.closesbranch() and r.branch() == branch:
                 repo.ui.status(_('reopening closed branch head %d\n') % r)
 
     if repo.ui.debugflag:
         repo.ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx.hex()))
     elif repo.ui.verbose:
         repo.ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx))
 
 def revert(ui, repo, ctx, parents, *pats, **opts):
     parent, p2 = parents
     node = ctx.node()
 
     mf = ctx.manifest()
     if node == p2:
         parent = p2
     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. in both cases, filesets should be evaluated against
     # workingctx to get consistent result (issue4497). this means 'set:**'
     # cannot be used to select missing files from target rev.
 
     # `names` is a mapping for all elements in working copy and target revision
     # The mapping is in the form:
     #   <asb path in repo> -> (<path from CWD>, <exactly specified by matcher?>)
     names = {}
 
     wlock = repo.wlock()
     try:
         ## filling of the `names` mapping
         # walk dirstate to fill `names`
 
         interactive = opts.get('interactive', False)
         wctx = repo[None]
         m = scmutil.match(wctx, pats, opts)
 
         # we'll need this later
         targetsubs = sorted(s for s in wctx.substate if m(s))
 
         if not m.always():
             for abs in repo.walk(matchmod.badmatch(m, lambda x, y: False)):
                 names[abs] = m.rel(abs), m.exact(abs)
 
             # walk target manifest to fill `names`
 
             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))
 
             for abs in ctx.walk(matchmod.badmatch(m, badfn)):
                 if abs not in names:
                     names[abs] = m.rel(abs), m.exact(abs)
 
             # Find status of all file in `names`.
             m = scmutil.matchfiles(repo, names)
 
             changes = repo.status(node1=node, match=m,
                                   unknown=True, ignored=True, clean=True)
         else:
             changes = repo.status(node1=node, match=m)
             for kind in changes:
                 for abs in kind:
                     names[abs] = m.rel(abs), m.exact(abs)
 
             m = scmutil.matchfiles(repo, names)
 
         modified = set(changes.modified)
         added    = set(changes.added)
         removed  = set(changes.removed)
         _deleted = set(changes.deleted)
         unknown  = set(changes.unknown)
         unknown.update(changes.ignored)
         clean    = set(changes.clean)
         modadded = set()
 
         # split between files known in target manifest and the others
         smf = set(mf)
 
         # determine the exact nature of the deleted changesets
         deladded = _deleted - smf
         deleted = _deleted - deladded
 
         # We need to account for the state of the file in the dirstate,
         # even when we revert against something else than parent. This will
         # slightly alter the behavior of revert (doing back up or not, delete
         # or just forget etc).
         if parent == node:
             dsmodified = modified
             dsadded = added
             dsremoved = removed
             # store all local modifications, useful later for rename detection
             localchanges = dsmodified | dsadded
             modified, added, removed = set(), set(), set()
         else:
             changes = repo.status(node1=parent, match=m)
             dsmodified = set(changes.modified)
             dsadded    = set(changes.added)
             dsremoved  = set(changes.removed)
             # store all local modifications, useful later for rename detection
             localchanges = dsmodified | dsadded
 
             # only take into account for removes between wc and target
             clean |= dsremoved - removed
             dsremoved &= removed
             # distinct between dirstate remove and other
             removed -= dsremoved
 
             modadded = added & dsmodified
             added -= modadded
 
             # tell newly modified apart.
             dsmodified &= modified
             dsmodified |= modified & dsadded # dirstate added may needs backup
             modified -= dsmodified
 
             # We need to wait for some post-processing to update this set
             # before making the distinction. The dirstate will be used for
             # that purpose.
             dsadded = added
 
         # in case of merge, files that are actually added can be reported as
         # modified, we need to post process the result
         if p2 != nullid:
             if pmf is None:
                 # only need parent manifest in the merge case,
                 # so do not read by default
                 pmf = repo[parent].manifest()
             mergeadd = dsmodified - set(pmf)
             dsadded |= mergeadd
             dsmodified -= mergeadd
 
         # if f is a rename, update `names` to also revert the source
         cwd = repo.getcwd()
         for f in localchanges:
             src = repo.dirstate.copied(f)
             # XXX should we check for rename down to target node?
             if src and src not in names and repo.dirstate[src] == 'r':
                 dsremoved.add(src)
                 names[src] = (repo.pathto(src, cwd), True)
 
         # distinguish between file to forget and the other
         added = set()
         for abs in dsadded:
             if repo.dirstate[abs] != 'a':
                 added.add(abs)
         dsadded -= added
 
         for abs in deladded:
             if repo.dirstate[abs] == 'a':
                 dsadded.add(abs)
         deladded -= dsadded
 
         # For files marked as removed, we check if an unknown file is present at
         # the same path. If a such file exists it may need to be backed up.
         # Making the distinction at this stage helps have simpler backup
         # logic.
         removunk = set()
         for abs in removed:
             target = repo.wjoin(abs)
             if os.path.lexists(target):
                 removunk.add(abs)
         removed -= removunk
 
         dsremovunk = set()
         for abs in dsremoved:
             target = repo.wjoin(abs)
             if os.path.lexists(target):
                 dsremovunk.add(abs)
         dsremoved -= dsremovunk
 
         # action to be actually performed by revert
         # (<list of file>, message>) tuple
         actions = {'revert': ([], _('reverting %s\n')),
                    'add': ([], _('adding %s\n')),
                    'remove': ([], _('removing %s\n')),
                    'drop': ([], _('removing %s\n')),
                    'forget': ([], _('forgetting %s\n')),
                    'undelete': ([], _('undeleting %s\n')),
                    'noop': (None, _('no changes needed to %s\n')),
                    'unknown': (None, _('file not managed: %s\n')),
                   }
 
         # "constant" that convey the backup strategy.
         # All set to `discard` if `no-backup` is set do avoid checking
         # no_backup lower in the code.
         # These values are ordered for comparison purposes
         backup = 2  # unconditionally do backup
         check = 1   # check if the existing file differs from target
         discard = 0 # never do backup
         if opts.get('no_backup'):
             backup = check = discard
 
         backupanddel = actions['remove']
         if not opts.get('no_backup'):
             backupanddel = actions['drop']
 
         disptable = (
             # dispatch table:
             #   file state
             #   action
             #   make backup
 
             ## Sets that results that will change file on disk
             # Modified compared to target, no local change
             (modified,      actions['revert'],   discard),
             # Modified compared to target, but local file is deleted
             (deleted,       actions['revert'],   discard),
             # Modified compared to target, local change
             (dsmodified,    actions['revert'],   backup),
             # Added since target
             (added,         actions['remove'],   discard),
             # Added in working directory
             (dsadded,       actions['forget'],   discard),
             # Added since target, have local modification
             (modadded,      backupanddel,        backup),
             # Added since target but file is missing in working directory
             (deladded,      actions['drop'],   discard),
             # Removed since  target, before working copy parent
             (removed,       actions['add'],      discard),
             # Same as `removed` but an unknown file exists at the same path
             (removunk,      actions['add'],      check),
             # Removed since targe, marked as such in working copy parent
             (dsremoved,     actions['undelete'], discard),
             # Same as `dsremoved` but an unknown file exists at the same path
             (dsremovunk,    actions['undelete'], check),
             ## the following sets does not result in any file changes
             # File with no modification
             (clean,         actions['noop'],     discard),
             # Existing file, not tracked anywhere
             (unknown,       actions['unknown'],  discard),
             )
 
         for abs, (rel, exact) in sorted(names.items()):
             # target file to be touch on disk (relative to cwd)
             target = repo.wjoin(abs)
             # search the entry in the dispatch table.
             # if the file is in any of these sets, it was touched in the working
             # directory parent and we are sure it needs to be reverted.
             for table, (xlist, msg), dobackup in disptable:
                 if abs not in table:
                     continue
                 if xlist is not None:
                     xlist.append(abs)
                     if dobackup and (backup <= dobackup
                                      or wctx[abs].cmp(ctx[abs])):
                             bakname = "%s.orig" % rel
                             ui.note(_('saving current version of %s as %s\n') %
                                     (rel, bakname))
                             if not opts.get('dry_run'):
                                 if interactive:
                                     util.copyfile(target, bakname)
                                 else:
                                     util.rename(target, bakname)
                     if ui.verbose or not exact:
                         if not isinstance(msg, basestring):
                             msg = msg(abs)
                         ui.status(msg % rel)
                 elif exact:
                     ui.warn(msg % rel)
                 break
 
         if not opts.get('dry_run'):
             needdata = ('revert', 'add', 'undelete')
             _revertprefetch(repo, ctx, *[actions[name][0] for name in needdata])
             _performrevert(repo, parents, ctx, actions, interactive)
 
         if targetsubs:
             # Revert the subrepos on the revert list
             for sub in targetsubs:
                 try:
                     wctx.sub(sub).revert(ctx.substate[sub], *pats, **opts)
                 except KeyError:
                     raise util.Abort("subrepository '%s' does not exist in %s!"
                                       % (sub, short(ctx.node())))
     finally:
         wlock.release()
 
 def _revertprefetch(repo, ctx, *files):
     """Let extension changing the storage layer prefetch content"""
     pass
 
 def _performrevert(repo, parents, ctx, actions, interactive=False):
     """function that actually perform all the actions computed for revert
 
     This is an independent function to let extension to plug in and react to
     the imminent revert.
 
     Make sure you have the working directory locked when calling this function.
     """
     parent, p2 = parents
     node = ctx.node()
     def checkout(f):
         fc = ctx[f]
         repo.wwrite(f, fc.data(), fc.flags())
 
     audit_path = pathutil.pathauditor(repo.root)
     for f in actions['forget'][0]:
         repo.dirstate.drop(f)
     for f in actions['remove'][0]:
         audit_path(f)
         try:
             util.unlinkpath(repo.wjoin(f))
         except OSError:
             pass
         repo.dirstate.remove(f)
     for f in actions['drop'][0]:
         audit_path(f)
         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
 
     newlyaddedandmodifiedfiles = set()
     if interactive:
         # Prompt the user for changes to revert
         torevert = [repo.wjoin(f) for f in actions['revert'][0]]
         m = scmutil.match(ctx, torevert, {})
         diffopts = patch.difffeatureopts(repo.ui, whitespace=True)
         diffopts.nodates = True
         diffopts.git = True
         reversehunks =  repo.ui.configbool('experimental',
                                            'revertalternateinteractivemode',
                                            True)
         if reversehunks:
             diff = patch.diff(repo, ctx.node(), None, m, opts=diffopts)
         else:
             diff = patch.diff(repo, None, ctx.node(), m, opts=diffopts)
         originalchunks = patch.parsepatch(diff)
 
         try:
 
             chunks = recordfilter(repo.ui, originalchunks)
             if reversehunks:
                 chunks = patch.reversehunks(chunks)
 
         except patch.PatchError as err:
             raise util.Abort(_('error parsing patch: %s') % err)
 
         newlyaddedandmodifiedfiles = newandmodified(chunks, originalchunks)
         # Apply changes
         fp = cStringIO.StringIO()
         for c in chunks:
             c.write(fp)
         dopatch = fp.tell()
         fp.seek(0)
         if dopatch:
             try:
                 patch.internalpatch(repo.ui, repo, fp, 1, eolmode=None)
             except patch.PatchError as err:
                 raise util.Abort(str(err))
         del fp
     else:
         for f in actions['revert'][0]:
             checkout(f)
             if normal:
                 normal(f)
 
     for f in actions['add'][0]:
         # Don't checkout modified files, they are already created by the diff
         if f not in newlyaddedandmodifiedfiles:
             checkout(f)
             repo.dirstate.add(f)
 
     normal = repo.dirstate.normallookup
     if node == parent and p2 == nullid:
         normal = repo.dirstate.normal
     for f in actions['undelete'][0]:
         checkout(f)
         normal(f)
 
     copied = copies.pathcopies(repo[parent], ctx)
 
     for f in actions['add'][0] + actions['undelete'][0] + actions['revert'][0]:
         if f in copied:
             repo.dirstate.copy(copied[f], f)
 
 def command(table):
     """Returns a function object to be used as a decorator for making commands.
 
     This function receives a command table as its argument. The table should
     be a dict.
 
     The returned function can be used as a decorator for adding commands
     to that command table. This function accepts multiple arguments to define
     a command.
 
     The first argument is the command name.
 
     The options argument is an iterable of tuples defining command arguments.
     See ``mercurial.fancyopts.fancyopts()`` for the format of each tuple.
 
     The synopsis argument defines a short, one line summary of how to use the
     command. This shows up in the help output.
 
     The norepo argument defines whether the command does not require a
     local repository. Most commands operate against a repository, thus the
     default is False.
 
     The optionalrepo argument defines whether the command optionally requires
     a local repository.
 
     The inferrepo argument defines whether to try to find a repository from the
     command line arguments. If True, arguments will be examined for potential
     repository locations. See ``findrepo()``. If a repository is found, it
     will be used.
     """
     def cmd(name, options=(), synopsis=None, norepo=False, optionalrepo=False,
             inferrepo=False):
         def decorator(func):
             if synopsis:
                 table[name] = func, list(options), synopsis
             else:
                 table[name] = func, list(options)
 
             if norepo:
                 # Avoid import cycle.
                 import commands
                 commands.norepo += ' %s' % ' '.join(parsealiases(name))
 
             if optionalrepo:
                 import commands
                 commands.optionalrepo += ' %s' % ' '.join(parsealiases(name))
 
             if inferrepo:
                 import commands
                 commands.inferrepo += ' %s' % ' '.join(parsealiases(name))
 
             return func
         return decorator
 
     return cmd
 
 # a list of (ui, repo, otherpeer, opts, missing) functions called by
 # commands.outgoing.  "missing" is "missing" of the result of
 # "findcommonoutgoing()"
 outgoinghooks = util.hooks()
 
 # a list of (ui, repo) functions called by commands.summary
 summaryhooks = util.hooks()
 
 # a list of (ui, repo, opts, changes) functions called by commands.summary.
 #
 # functions should return tuple of booleans below, if 'changes' is None:
 #  (whether-incomings-are-needed, whether-outgoings-are-needed)
 #
 # otherwise, 'changes' is a tuple of tuples below:
 #  - (sourceurl, sourcebranch, sourcepeer, incoming)
 #  - (desturl,   destbranch,   destpeer,   outgoing)
 summaryremotehooks = util.hooks()
 
 # A list of state files kept by multistep operations like graft.
 # Since graft cannot be aborted, it is considered 'clearable' by update.
 # note: bisect is intentionally excluded
 # (state file, clearable, allowcommit, error, hint)
 unfinishedstates = [
     ('graftstate', True, False, _('graft in progress'),
      _("use 'hg graft --continue' or 'hg update' to abort")),
     ('updatestate', True, False, _('last update was interrupted'),
      _("use 'hg update' to get a consistent checkout"))
     ]
 
 def checkunfinished(repo, commit=False):
     '''Look for an unfinished multistep operation, like graft, and abort
     if found. It's probably good to check this right before
     bailifchanged().
     '''
     for f, clearable, allowcommit, msg, hint in unfinishedstates:
         if commit and allowcommit:
             continue
         if repo.vfs.exists(f):
             raise util.Abort(msg, hint=hint)
 
 def clearunfinished(repo):
     '''Check for unfinished operations (as above), and clear the ones
     that are clearable.
     '''
     for f, clearable, allowcommit, msg, hint in unfinishedstates:
         if not clearable and repo.vfs.exists(f):
             raise util.Abort(msg, hint=hint)
     for f, clearable, allowcommit, msg, hint in unfinishedstates:
         if clearable and repo.vfs.exists(f):
             util.unlink(repo.join(f))
 
 class dirstateguard(object):
     '''Restore dirstate at unexpected failure.
 
     At the construction, this class does:
 
     - write current ``repo.dirstate`` out, and
     - save ``.hg/dirstate`` into the backup file
 
     This restores ``.hg/dirstate`` from backup file, if ``release()``
     is invoked before ``close()``.
 
     This just removes the backup file at ``close()`` before ``release()``.
     '''
 
     def __init__(self, repo, name):
         repo.dirstate.write()
         self._repo = repo
         self._filename = 'dirstate.backup.%s.%d' % (name, id(self))
         repo.vfs.write(self._filename, repo.vfs.tryread('dirstate'))
         self._active = True
         self._closed = False
 
     def __del__(self):
         if self._active: # still active
             # this may occur, even if this class is used correctly:
             # for example, releasing other resources like transaction
             # may raise exception before ``dirstateguard.release`` in
             # ``release(tr, ....)``.
             self._abort()
 
     def close(self):
         if not self._active: # already inactivated
             msg = (_("can't close already inactivated backup: %s")
                    % self._filename)
             raise util.Abort(msg)
 
         self._repo.vfs.unlink(self._filename)
         self._active = False
         self._closed = True
 
     def _abort(self):
         # this "invalidate()" prevents "wlock.release()" from writing
         # changes of dirstate out after restoring to original status
         self._repo.dirstate.invalidate()
 
         self._repo.vfs.rename(self._filename, 'dirstate')
         self._active = False
 
     def release(self):
         if not self._closed:
             if not self._active: # already inactivated
                 msg = (_("can't release already inactivated backup: %s")
                        % self._filename)
                 raise util.Abort(msg)
             self._abort()

mercurial/templates/map-cmdline.xml

@@ -1,20 +1,20 b''
-header = '<?xml version="1.0"?>\n<log>\n'
-footer = '</log>\n'
+docheader = '<?xml version="1.0"?>\n<log>\n'
+docfooter = '</log>\n'
 
 changeset = '<logentry revision="{rev}" node="{node}">\n{branches}{bookmarks}{tags}{parents}<author email="{author|email|xmlescape}">{author|person|xmlescape}</author>\n<date>{date|rfc3339date}</date>\n<msg xml:space="preserve">{desc|xmlescape}</msg>\n</logentry>\n'
 changeset_verbose = '<logentry revision="{rev}" node="{node}">\n{branches}{bookmarks}{tags}{parents}<author email="{author|email|xmlescape}">{author|person|xmlescape}</author>\n<date>{date|rfc3339date}</date>\n<msg xml:space="preserve">{desc|xmlescape}</msg>\n<paths>\n{file_adds}{file_dels}{file_mods}</paths>\n{file_copies}</logentry>\n'
 changeset_debug = '<logentry revision="{rev}" node="{node}">\n{branches}{bookmarks}{tags}{parents}<author email="{author|email|xmlescape}">{author|person|xmlescape}</author>\n<date>{date|rfc3339date}</date>\n<msg xml:space="preserve">{desc|xmlescape}</msg>\n<paths>\n{file_adds}{file_dels}{file_mods}</paths>\n{file_copies}{extras}</logentry>\n'
 
 file_add  = '<path action="A">{file_add|xmlescape}</path>\n'
 file_mod  = '<path action="M">{file_mod|xmlescape}</path>\n'
 file_del  = '<path action="R">{file_del|xmlescape}</path>\n'
 
 start_file_copies = '<copies>\n'
 file_copy = '<copy source="{source|xmlescape}">{name|xmlescape}</copy>\n'
 end_file_copies = '</copies>\n'
 
 parent = '<parent revision="{rev}" node="{node}" />\n'
 branch = '<branch>{branch|xmlescape}</branch>\n'
 tag = '<tag>{tag|xmlescape}</tag>\n'
 bookmark = '<bookmark>{bookmark|xmlescape}</bookmark>\n'
 extra = '<extra key="{key|xmlescape}">{value|xmlescape}</extra>\n'

tests/test-command-template.t

@@ -1,3428 +1,3433 b''
   $ hg init a
   $ cd a
   $ echo a > a
   $ hg add a
   $ echo line 1 > b
   $ echo line 2 >> b
   $ hg commit -l b -d '1000000 0' -u 'User Name <user@hostname>'
 
   $ hg add b
   $ echo other 1 > c
   $ echo other 2 >> c
   $ echo >> c
   $ echo other 3 >> c
   $ hg commit -l c -d '1100000 0' -u 'A. N. Other <other@place>'
 
   $ hg add c
   $ hg commit -m 'no person' -d '1200000 0' -u 'other@place'
   $ echo c >> c
   $ hg commit -m 'no user, no domain' -d '1300000 0' -u 'person'
 
   $ echo foo > .hg/branch
   $ hg commit -m 'new branch' -d '1400000 0' -u 'person'
 
   $ hg co -q 3
   $ echo other 4 >> d
   $ hg add d
   $ hg commit -m 'new head' -d '1500000 0' -u 'person'
 
   $ hg merge -q foo
   $ hg commit -m 'merge' -d '1500001 0' -u 'person'
 
 Second branch starting at nullrev:
 
   $ hg update null
   0 files updated, 0 files merged, 4 files removed, 0 files unresolved
   $ echo second > second
   $ hg add second
   $ hg commit -m second -d '1000000 0' -u 'User Name <user@hostname>'
   created new head
 
   $ echo third > third
   $ hg add third
   $ hg mv second fourth
   $ hg commit -m third -d "2020-01-01 10:01"
 
   $ hg log --template '{join(file_copies, ",\n")}\n' -r .
   fourth (second)
   $ hg log -T '{file_copies % "{source} -> {name}\n"}' -r .
   second -> fourth
   $ hg log -T '{rev} {ifcontains("fourth", file_copies, "t", "f")}\n' -r .:7
   8 t
   7 f
 
 Working-directory revision has special identifiers, though they are still
 experimental:
 
   $ hg log -r 'wdir()' -T '{rev}:{node}\n'
   2147483647:ffffffffffffffffffffffffffffffffffffffff
 
 Some keywords are invalid for working-directory revision, but they should
 never cause crash:
 
   $ hg log -r 'wdir()' -T '{manifest}\n'
   
 
 Quoting for ui.logtemplate
 
   $ hg tip --config "ui.logtemplate={rev}\n"
   8
   $ hg tip --config "ui.logtemplate='{rev}\n'"
   8
   $ hg tip --config 'ui.logtemplate="{rev}\n"'
   8
 
 Make sure user/global hgrc does not affect tests
 
   $ echo '[ui]' > .hg/hgrc
   $ echo 'logtemplate =' >> .hg/hgrc
   $ echo 'style =' >> .hg/hgrc
 
 Add some simple styles to settings
 
   $ echo '[templates]' >> .hg/hgrc
   $ printf 'simple = "{rev}\\n"\n' >> .hg/hgrc
   $ printf 'simple2 = {rev}\\n\n' >> .hg/hgrc
 
   $ hg log -l1 -Tsimple
   8
   $ hg log -l1 -Tsimple2
   8
 
 Test templates and style maps in files:
 
   $ echo "{rev}" > tmpl
   $ hg log -l1 -T./tmpl
   8
   $ hg log -l1 -Tblah/blah
   blah/blah (no-eol)
 
   $ printf 'changeset = "{rev}\\n"\n' > map-simple
   $ hg log -l1 -T./map-simple
   8
 
 Template should precede style option
 
   $ hg log -l1 --style default -T '{rev}\n'
   8
 
 Add a commit with empty description, to ensure that the templates
 below will omit the description line.
 
   $ echo c >> c
   $ hg add c
   $ hg commit -qm ' '
 
 Default style is like normal output. Phases style should be the same
 as default style, except for extra phase lines.
 
   $ hg log > log.out
   $ hg log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg log -T phases > phases.out
   $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
 
   $ hg log -v > log.out
   $ hg log -v --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg log -v -T phases > phases.out
   $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
   +phase:       draft
 
   $ hg log -q > log.out
   $ hg log -q --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg log -q -T phases > phases.out
   $ cmp log.out phases.out || diff -u log.out phases.out
 
   $ hg log --debug > log.out
   $ hg log --debug --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg log --debug -T phases > phases.out
   $ cmp log.out phases.out || diff -u log.out phases.out
 
 Default style of working-directory revision should also be the same (but
 date may change while running tests):
 
   $ hg log -r 'wdir()' | sed 's|^date:.*|date:|' > log.out
   $ hg log -r 'wdir()' --style default | sed 's|^date:.*|date:|' > style.out
   $ cmp log.out style.out || diff -u log.out style.out
 
   $ hg log -r 'wdir()' -v | sed 's|^date:.*|date:|' > log.out
   $ hg log -r 'wdir()' -v --style default | sed 's|^date:.*|date:|' > style.out
   $ cmp log.out style.out || diff -u log.out style.out
 
   $ hg log -r 'wdir()' -q > log.out
   $ hg log -r 'wdir()' -q --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
 
   $ hg log -r 'wdir()' --debug | sed 's|^date:.*|date:|' > log.out
   $ hg log -r 'wdir()' --debug --style default \
   > | sed 's|^date:.*|date:|' > style.out
   $ cmp log.out style.out || diff -u log.out style.out
 
 Default style should also preserve color information (issue2866):
 
   $ cp $HGRCPATH $HGRCPATH-bak
   $ cat <<EOF >> $HGRCPATH
   > [extensions]
   > color=
   > EOF
 
   $ hg --color=debug log > log.out
   $ hg --color=debug log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg --color=debug log -T phases > phases.out
   $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
 
   $ hg --color=debug -v log > log.out
   $ hg --color=debug -v log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg --color=debug -v log -T phases > phases.out
   $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
   +[log.phase|phase:       draft]
 
   $ hg --color=debug -q log > log.out
   $ hg --color=debug -q log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg --color=debug -q log -T phases > phases.out
   $ cmp log.out phases.out || diff -u log.out phases.out
 
   $ hg --color=debug --debug log > log.out
   $ hg --color=debug --debug log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg --color=debug --debug log -T phases > phases.out
   $ cmp log.out phases.out || diff -u log.out phases.out
 
   $ mv $HGRCPATH-bak $HGRCPATH
 
 Remove commit with empty commit message, so as to not pollute further
 tests.
 
   $ hg --config extensions.strip= strip -q .
 
 Revision with no copies (used to print a traceback):
 
   $ hg tip -v --template '\n'
   
 
 Compact style works:
 
   $ hg log -Tcompact
   8[tip]   95c24699272e   2020-01-01 10:01 +0000   test
     third
   
   7:-1   29114dbae42b   1970-01-12 13:46 +0000   user
     second
   
   6:5,4   d41e714fe50d   1970-01-18 08:40 +0000   person
     merge
   
   5:3   13207e5a10d9   1970-01-18 08:40 +0000   person
     new head
   
   4   bbe44766e73d   1970-01-17 04:53 +0000   person
     new branch
   
   3   10e46f2dcbf4   1970-01-16 01:06 +0000   person
     no user, no domain
   
   2   97054abb4ab8   1970-01-14 21:20 +0000   other
     no person
   
   1   b608e9d1a3f0   1970-01-13 17:33 +0000   other
     other 1
   
   0   1e4e1b8f71e0   1970-01-12 13:46 +0000   user
     line 1
   
 
   $ hg log -v --style compact
   8[tip]   95c24699272e   2020-01-01 10:01 +0000   test
     third
   
   7:-1   29114dbae42b   1970-01-12 13:46 +0000   User Name <user@hostname>
     second
   
   6:5,4   d41e714fe50d   1970-01-18 08:40 +0000   person
     merge
   
   5:3   13207e5a10d9   1970-01-18 08:40 +0000   person
     new head
   
   4   bbe44766e73d   1970-01-17 04:53 +0000   person
     new branch
   
   3   10e46f2dcbf4   1970-01-16 01:06 +0000   person
     no user, no domain
   
   2   97054abb4ab8   1970-01-14 21:20 +0000   other@place
     no person
   
   1   b608e9d1a3f0   1970-01-13 17:33 +0000   A. N. Other <other@place>
     other 1
   other 2
   
   other 3
   
   0   1e4e1b8f71e0   1970-01-12 13:46 +0000   User Name <user@hostname>
     line 1
   line 2
   
 
   $ hg log --debug --style compact
   8[tip]:7,-1   95c24699272e   2020-01-01 10:01 +0000   test
     third
   
   7:-1,-1   29114dbae42b   1970-01-12 13:46 +0000   User Name <user@hostname>
     second
   
   6:5,4   d41e714fe50d   1970-01-18 08:40 +0000   person
     merge
   
   5:3,-1   13207e5a10d9   1970-01-18 08:40 +0000   person
     new head
   
   4:3,-1   bbe44766e73d   1970-01-17 04:53 +0000   person
     new branch
   
   3:2,-1   10e46f2dcbf4   1970-01-16 01:06 +0000   person
     no user, no domain
   
   2:1,-1   97054abb4ab8   1970-01-14 21:20 +0000   other@place
     no person
   
   1:0,-1   b608e9d1a3f0   1970-01-13 17:33 +0000   A. N. Other <other@place>
     other 1
   other 2
   
   other 3
   
   0:-1,-1   1e4e1b8f71e0   1970-01-12 13:46 +0000   User Name <user@hostname>
     line 1
   line 2
   
 
 Test xml styles:
 
+  $ hg log --style xml -r 'not all()'
+  <?xml version="1.0"?>
+  <log>
+  </log>
+
   $ hg log --style xml
   <?xml version="1.0"?>
   <log>
   <logentry revision="8" node="95c24699272ef57d062b8bccc32c878bf841784a">
   <tag>tip</tag>
   <author email="test">test</author>
   <date>2020-01-01T10:01:00+00:00</date>
   <msg xml:space="preserve">third</msg>
   </logentry>
   <logentry revision="7" node="29114dbae42b9f078cf2714dbe3a86bba8ec7453">
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="user@hostname">User Name</author>
   <date>1970-01-12T13:46:40+00:00</date>
   <msg xml:space="preserve">second</msg>
   </logentry>
   <logentry revision="6" node="d41e714fe50d9e4a5f11b4d595d543481b5f980b">
   <parent revision="5" node="13207e5a10d9fd28ec424934298e176197f2c67f" />
   <parent revision="4" node="bbe44766e73d5f11ed2177f1838de10c53ef3e74" />
   <author email="person">person</author>
   <date>1970-01-18T08:40:01+00:00</date>
   <msg xml:space="preserve">merge</msg>
   </logentry>
   <logentry revision="5" node="13207e5a10d9fd28ec424934298e176197f2c67f">
   <parent revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47" />
   <author email="person">person</author>
   <date>1970-01-18T08:40:00+00:00</date>
   <msg xml:space="preserve">new head</msg>
   </logentry>
   <logentry revision="4" node="bbe44766e73d5f11ed2177f1838de10c53ef3e74">
   <branch>foo</branch>
   <author email="person">person</author>
   <date>1970-01-17T04:53:20+00:00</date>
   <msg xml:space="preserve">new branch</msg>
   </logentry>
   <logentry revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47">
   <author email="person">person</author>
   <date>1970-01-16T01:06:40+00:00</date>
   <msg xml:space="preserve">no user, no domain</msg>
   </logentry>
   <logentry revision="2" node="97054abb4ab824450e9164180baf491ae0078465">
   <author email="other@place">other</author>
   <date>1970-01-14T21:20:00+00:00</date>
   <msg xml:space="preserve">no person</msg>
   </logentry>
   <logentry revision="1" node="b608e9d1a3f0273ccf70fb85fd6866b3482bf965">
   <author email="other@place">A. N. Other</author>
   <date>1970-01-13T17:33:20+00:00</date>
   <msg xml:space="preserve">other 1
   other 2
   
   other 3</msg>
   </logentry>
   <logentry revision="0" node="1e4e1b8f71e05681d422154f5421e385fec3454f">
   <author email="user@hostname">User Name</author>
   <date>1970-01-12T13:46:40+00:00</date>
   <msg xml:space="preserve">line 1
   line 2</msg>
   </logentry>
   </log>
 
   $ hg log -v --style xml
   <?xml version="1.0"?>
   <log>
   <logentry revision="8" node="95c24699272ef57d062b8bccc32c878bf841784a">
   <tag>tip</tag>
   <author email="test">test</author>
   <date>2020-01-01T10:01:00+00:00</date>
   <msg xml:space="preserve">third</msg>
   <paths>
   <path action="A">fourth</path>
   <path action="A">third</path>
   <path action="R">second</path>
   </paths>
   <copies>
   <copy source="second">fourth</copy>
   </copies>
   </logentry>
   <logentry revision="7" node="29114dbae42b9f078cf2714dbe3a86bba8ec7453">
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="user@hostname">User Name</author>
   <date>1970-01-12T13:46:40+00:00</date>
   <msg xml:space="preserve">second</msg>
   <paths>
   <path action="A">second</path>
   </paths>
   </logentry>
   <logentry revision="6" node="d41e714fe50d9e4a5f11b4d595d543481b5f980b">
   <parent revision="5" node="13207e5a10d9fd28ec424934298e176197f2c67f" />
   <parent revision="4" node="bbe44766e73d5f11ed2177f1838de10c53ef3e74" />
   <author email="person">person</author>
   <date>1970-01-18T08:40:01+00:00</date>
   <msg xml:space="preserve">merge</msg>
   <paths>
   </paths>
   </logentry>
   <logentry revision="5" node="13207e5a10d9fd28ec424934298e176197f2c67f">
   <parent revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47" />
   <author email="person">person</author>
   <date>1970-01-18T08:40:00+00:00</date>
   <msg xml:space="preserve">new head</msg>
   <paths>
   <path action="A">d</path>
   </paths>
   </logentry>
   <logentry revision="4" node="bbe44766e73d5f11ed2177f1838de10c53ef3e74">
   <branch>foo</branch>
   <author email="person">person</author>
   <date>1970-01-17T04:53:20+00:00</date>
   <msg xml:space="preserve">new branch</msg>
   <paths>
   </paths>
   </logentry>
   <logentry revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47">
   <author email="person">person</author>
   <date>1970-01-16T01:06:40+00:00</date>
   <msg xml:space="preserve">no user, no domain</msg>
   <paths>
   <path action="M">c</path>
   </paths>
   </logentry>
   <logentry revision="2" node="97054abb4ab824450e9164180baf491ae0078465">
   <author email="other@place">other</author>
   <date>1970-01-14T21:20:00+00:00</date>
   <msg xml:space="preserve">no person</msg>
   <paths>
   <path action="A">c</path>
   </paths>
   </logentry>
   <logentry revision="1" node="b608e9d1a3f0273ccf70fb85fd6866b3482bf965">
   <author email="other@place">A. N. Other</author>
   <date>1970-01-13T17:33:20+00:00</date>
   <msg xml:space="preserve">other 1
   other 2
   
   other 3</msg>
   <paths>
   <path action="A">b</path>
   </paths>
   </logentry>
   <logentry revision="0" node="1e4e1b8f71e05681d422154f5421e385fec3454f">
   <author email="user@hostname">User Name</author>
   <date>1970-01-12T13:46:40+00:00</date>
   <msg xml:space="preserve">line 1
   line 2</msg>
   <paths>
   <path action="A">a</path>
   </paths>
   </logentry>
   </log>
 
   $ hg log --debug --style xml
   <?xml version="1.0"?>
   <log>
   <logentry revision="8" node="95c24699272ef57d062b8bccc32c878bf841784a">
   <tag>tip</tag>
   <parent revision="7" node="29114dbae42b9f078cf2714dbe3a86bba8ec7453" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="test">test</author>
   <date>2020-01-01T10:01:00+00:00</date>
   <msg xml:space="preserve">third</msg>
   <paths>
   <path action="A">fourth</path>
   <path action="A">third</path>
   <path action="R">second</path>
   </paths>
   <copies>
   <copy source="second">fourth</copy>
   </copies>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="7" node="29114dbae42b9f078cf2714dbe3a86bba8ec7453">
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="user@hostname">User Name</author>
   <date>1970-01-12T13:46:40+00:00</date>
   <msg xml:space="preserve">second</msg>
   <paths>
   <path action="A">second</path>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="6" node="d41e714fe50d9e4a5f11b4d595d543481b5f980b">
   <parent revision="5" node="13207e5a10d9fd28ec424934298e176197f2c67f" />
   <parent revision="4" node="bbe44766e73d5f11ed2177f1838de10c53ef3e74" />
   <author email="person">person</author>
   <date>1970-01-18T08:40:01+00:00</date>
   <msg xml:space="preserve">merge</msg>
   <paths>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="5" node="13207e5a10d9fd28ec424934298e176197f2c67f">
   <parent revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="person">person</author>
   <date>1970-01-18T08:40:00+00:00</date>
   <msg xml:space="preserve">new head</msg>
   <paths>
   <path action="A">d</path>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="4" node="bbe44766e73d5f11ed2177f1838de10c53ef3e74">
   <branch>foo</branch>
   <parent revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="person">person</author>
   <date>1970-01-17T04:53:20+00:00</date>
   <msg xml:space="preserve">new branch</msg>
   <paths>
   </paths>
   <extra key="branch">foo</extra>
   </logentry>
   <logentry revision="3" node="10e46f2dcbf4823578cf180f33ecf0b957964c47">
   <parent revision="2" node="97054abb4ab824450e9164180baf491ae0078465" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="person">person</author>
   <date>1970-01-16T01:06:40+00:00</date>
   <msg xml:space="preserve">no user, no domain</msg>
   <paths>
   <path action="M">c</path>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="2" node="97054abb4ab824450e9164180baf491ae0078465">
   <parent revision="1" node="b608e9d1a3f0273ccf70fb85fd6866b3482bf965" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="other@place">other</author>
   <date>1970-01-14T21:20:00+00:00</date>
   <msg xml:space="preserve">no person</msg>
   <paths>
   <path action="A">c</path>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="1" node="b608e9d1a3f0273ccf70fb85fd6866b3482bf965">
   <parent revision="0" node="1e4e1b8f71e05681d422154f5421e385fec3454f" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="other@place">A. N. Other</author>
   <date>1970-01-13T17:33:20+00:00</date>
   <msg xml:space="preserve">other 1
   other 2
   
   other 3</msg>
   <paths>
   <path action="A">b</path>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   <logentry revision="0" node="1e4e1b8f71e05681d422154f5421e385fec3454f">
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <parent revision="-1" node="0000000000000000000000000000000000000000" />
   <author email="user@hostname">User Name</author>
   <date>1970-01-12T13:46:40+00:00</date>
   <msg xml:space="preserve">line 1
   line 2</msg>
   <paths>
   <path action="A">a</path>
   </paths>
   <extra key="branch">default</extra>
   </logentry>
   </log>
 
 
 Test JSON style:
 
   $ hg log -k nosuch -Tjson
   []
 
   $ hg log -qr . -Tjson
   [
    {
     "rev": 8,
     "node": "95c24699272ef57d062b8bccc32c878bf841784a"
    }
   ]
 
   $ hg log -vpr . -Tjson --stat
   [
    {
     "rev": 8,
     "node": "95c24699272ef57d062b8bccc32c878bf841784a",
     "branch": "default",
     "phase": "draft",
     "user": "test",
     "date": [1577872860, 0],
     "desc": "third",
     "bookmarks": [],
     "tags": ["tip"],
     "parents": ["29114dbae42b9f078cf2714dbe3a86bba8ec7453"],
     "files": ["fourth", "second", "third"],
     "diffstat": " fourth |  1 +\n second |  1 -\n third  |  1 +\n 3 files changed, 2 insertions(+), 1 deletions(-)\n",
     "diff": "diff -r 29114dbae42b -r 95c24699272e fourth\n--- /dev/null\tThu Jan 01 00:00:00 1970 +0000\n+++ b/fourth\tWed Jan 01 10:01:00 2020 +0000\n@@ -0,0 +1,1 @@\n+second\ndiff -r 29114dbae42b -r 95c24699272e second\n--- a/second\tMon Jan 12 13:46:40 1970 +0000\n+++ /dev/null\tThu Jan 01 00:00:00 1970 +0000\n@@ -1,1 +0,0 @@\n-second\ndiff -r 29114dbae42b -r 95c24699272e third\n--- /dev/null\tThu Jan 01 00:00:00 1970 +0000\n+++ b/third\tWed Jan 01 10:01:00 2020 +0000\n@@ -0,0 +1,1 @@\n+third\n"
    }
   ]
 
 honor --git but not format-breaking diffopts
   $ hg --config diff.noprefix=True log --git -vpr . -Tjson
   [
    {
     "rev": 8,
     "node": "95c24699272ef57d062b8bccc32c878bf841784a",
     "branch": "default",
     "phase": "draft",
     "user": "test",
     "date": [1577872860, 0],
     "desc": "third",
     "bookmarks": [],
     "tags": ["tip"],
     "parents": ["29114dbae42b9f078cf2714dbe3a86bba8ec7453"],
     "files": ["fourth", "second", "third"],
     "diff": "diff --git a/second b/fourth\nrename from second\nrename to fourth\ndiff --git a/third b/third\nnew file mode 100644\n--- /dev/null\n+++ b/third\n@@ -0,0 +1,1 @@\n+third\n"
    }
   ]
 
   $ hg log -T json
   [
    {
     "rev": 8,
     "node": "95c24699272ef57d062b8bccc32c878bf841784a",
     "branch": "default",
     "phase": "draft",
     "user": "test",
     "date": [1577872860, 0],
     "desc": "third",
     "bookmarks": [],
     "tags": ["tip"],
     "parents": ["29114dbae42b9f078cf2714dbe3a86bba8ec7453"]
    },
    {
     "rev": 7,
     "node": "29114dbae42b9f078cf2714dbe3a86bba8ec7453",
     "branch": "default",
     "phase": "draft",
     "user": "User Name <user@hostname>",
     "date": [1000000, 0],
     "desc": "second",
     "bookmarks": [],
     "tags": [],
     "parents": ["0000000000000000000000000000000000000000"]
    },
    {
     "rev": 6,
     "node": "d41e714fe50d9e4a5f11b4d595d543481b5f980b",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1500001, 0],
     "desc": "merge",
     "bookmarks": [],
     "tags": [],
     "parents": ["13207e5a10d9fd28ec424934298e176197f2c67f", "bbe44766e73d5f11ed2177f1838de10c53ef3e74"]
    },
    {
     "rev": 5,
     "node": "13207e5a10d9fd28ec424934298e176197f2c67f",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1500000, 0],
     "desc": "new head",
     "bookmarks": [],
     "tags": [],
     "parents": ["10e46f2dcbf4823578cf180f33ecf0b957964c47"]
    },
    {
     "rev": 4,
     "node": "bbe44766e73d5f11ed2177f1838de10c53ef3e74",
     "branch": "foo",
     "phase": "draft",
     "user": "person",
     "date": [1400000, 0],
     "desc": "new branch",
     "bookmarks": [],
     "tags": [],
     "parents": ["10e46f2dcbf4823578cf180f33ecf0b957964c47"]
    },
    {
     "rev": 3,
     "node": "10e46f2dcbf4823578cf180f33ecf0b957964c47",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1300000, 0],
     "desc": "no user, no domain",
     "bookmarks": [],
     "tags": [],
     "parents": ["97054abb4ab824450e9164180baf491ae0078465"]
    },
    {
     "rev": 2,
     "node": "97054abb4ab824450e9164180baf491ae0078465",
     "branch": "default",
     "phase": "draft",
     "user": "other@place",
     "date": [1200000, 0],
     "desc": "no person",
     "bookmarks": [],
     "tags": [],
     "parents": ["b608e9d1a3f0273ccf70fb85fd6866b3482bf965"]
    },
    {
     "rev": 1,
     "node": "b608e9d1a3f0273ccf70fb85fd6866b3482bf965",
     "branch": "default",
     "phase": "draft",
     "user": "A. N. Other <other@place>",
     "date": [1100000, 0],
     "desc": "other 1\nother 2\n\nother 3",
     "bookmarks": [],
     "tags": [],
     "parents": ["1e4e1b8f71e05681d422154f5421e385fec3454f"]
    },
    {
     "rev": 0,
     "node": "1e4e1b8f71e05681d422154f5421e385fec3454f",
     "branch": "default",
     "phase": "draft",
     "user": "User Name <user@hostname>",
     "date": [1000000, 0],
     "desc": "line 1\nline 2",
     "bookmarks": [],
     "tags": [],
     "parents": ["0000000000000000000000000000000000000000"]
    }
   ]
 
   $ hg heads -v -Tjson
   [
    {
     "rev": 8,
     "node": "95c24699272ef57d062b8bccc32c878bf841784a",
     "branch": "default",
     "phase": "draft",
     "user": "test",
     "date": [1577872860, 0],
     "desc": "third",
     "bookmarks": [],
     "tags": ["tip"],
     "parents": ["29114dbae42b9f078cf2714dbe3a86bba8ec7453"],
     "files": ["fourth", "second", "third"]
    },
    {
     "rev": 6,
     "node": "d41e714fe50d9e4a5f11b4d595d543481b5f980b",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1500001, 0],
     "desc": "merge",
     "bookmarks": [],
     "tags": [],
     "parents": ["13207e5a10d9fd28ec424934298e176197f2c67f", "bbe44766e73d5f11ed2177f1838de10c53ef3e74"],
     "files": []
    },
    {
     "rev": 4,
     "node": "bbe44766e73d5f11ed2177f1838de10c53ef3e74",
     "branch": "foo",
     "phase": "draft",
     "user": "person",
     "date": [1400000, 0],
     "desc": "new branch",
     "bookmarks": [],
     "tags": [],
     "parents": ["10e46f2dcbf4823578cf180f33ecf0b957964c47"],
     "files": []
    }
   ]
 
   $ hg log --debug -Tjson
   [
    {
     "rev": 8,
     "node": "95c24699272ef57d062b8bccc32c878bf841784a",
     "branch": "default",
     "phase": "draft",
     "user": "test",
     "date": [1577872860, 0],
     "desc": "third",
     "bookmarks": [],
     "tags": ["tip"],
     "parents": ["29114dbae42b9f078cf2714dbe3a86bba8ec7453"],
     "manifest": "94961b75a2da554b4df6fb599e5bfc7d48de0c64",
     "extra": {"branch": "default"},
     "modified": [],
     "added": ["fourth", "third"],
     "removed": ["second"]
    },
    {
     "rev": 7,
     "node": "29114dbae42b9f078cf2714dbe3a86bba8ec7453",
     "branch": "default",
     "phase": "draft",
     "user": "User Name <user@hostname>",
     "date": [1000000, 0],
     "desc": "second",
     "bookmarks": [],
     "tags": [],
     "parents": ["0000000000000000000000000000000000000000"],
     "manifest": "f2dbc354b94e5ec0b4f10680ee0cee816101d0bf",
     "extra": {"branch": "default"},
     "modified": [],
     "added": ["second"],
     "removed": []
    },
    {
     "rev": 6,
     "node": "d41e714fe50d9e4a5f11b4d595d543481b5f980b",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1500001, 0],
     "desc": "merge",
     "bookmarks": [],
     "tags": [],
     "parents": ["13207e5a10d9fd28ec424934298e176197f2c67f", "bbe44766e73d5f11ed2177f1838de10c53ef3e74"],
     "manifest": "4dc3def4f9b4c6e8de820f6ee74737f91e96a216",
     "extra": {"branch": "default"},
     "modified": [],
     "added": [],
     "removed": []
    },
    {
     "rev": 5,
     "node": "13207e5a10d9fd28ec424934298e176197f2c67f",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1500000, 0],
     "desc": "new head",
     "bookmarks": [],
     "tags": [],
     "parents": ["10e46f2dcbf4823578cf180f33ecf0b957964c47"],
     "manifest": "4dc3def4f9b4c6e8de820f6ee74737f91e96a216",
     "extra": {"branch": "default"},
     "modified": [],
     "added": ["d"],
     "removed": []
    },
    {
     "rev": 4,
     "node": "bbe44766e73d5f11ed2177f1838de10c53ef3e74",
     "branch": "foo",
     "phase": "draft",
     "user": "person",
     "date": [1400000, 0],
     "desc": "new branch",
     "bookmarks": [],
     "tags": [],
     "parents": ["10e46f2dcbf4823578cf180f33ecf0b957964c47"],
     "manifest": "cb5a1327723bada42f117e4c55a303246eaf9ccc",
     "extra": {"branch": "foo"},
     "modified": [],
     "added": [],
     "removed": []
    },
    {
     "rev": 3,
     "node": "10e46f2dcbf4823578cf180f33ecf0b957964c47",
     "branch": "default",
     "phase": "draft",
     "user": "person",
     "date": [1300000, 0],
     "desc": "no user, no domain",
     "bookmarks": [],
     "tags": [],
     "parents": ["97054abb4ab824450e9164180baf491ae0078465"],
     "manifest": "cb5a1327723bada42f117e4c55a303246eaf9ccc",
     "extra": {"branch": "default"},
     "modified": ["c"],
     "added": [],
     "removed": []
    },
    {
     "rev": 2,
     "node": "97054abb4ab824450e9164180baf491ae0078465",
     "branch": "default",
     "phase": "draft",
     "user": "other@place",
     "date": [1200000, 0],
     "desc": "no person",
     "bookmarks": [],
     "tags": [],
     "parents": ["b608e9d1a3f0273ccf70fb85fd6866b3482bf965"],
     "manifest": "6e0e82995c35d0d57a52aca8da4e56139e06b4b1",
     "extra": {"branch": "default"},
     "modified": [],
     "added": ["c"],
     "removed": []
    },
    {
     "rev": 1,
     "node": "b608e9d1a3f0273ccf70fb85fd6866b3482bf965",
     "branch": "default",
     "phase": "draft",
     "user": "A. N. Other <other@place>",
     "date": [1100000, 0],
     "desc": "other 1\nother 2\n\nother 3",
     "bookmarks": [],
     "tags": [],
     "parents": ["1e4e1b8f71e05681d422154f5421e385fec3454f"],
     "manifest": "4e8d705b1e53e3f9375e0e60dc7b525d8211fe55",
     "extra": {"branch": "default"},
     "modified": [],
     "added": ["b"],
     "removed": []
    },
    {
     "rev": 0,
     "node": "1e4e1b8f71e05681d422154f5421e385fec3454f",
     "branch": "default",
     "phase": "draft",
     "user": "User Name <user@hostname>",
     "date": [1000000, 0],
     "desc": "line 1\nline 2",
     "bookmarks": [],
     "tags": [],
     "parents": ["0000000000000000000000000000000000000000"],
     "manifest": "a0c8bcbbb45c63b90b70ad007bf38961f64f2af0",
     "extra": {"branch": "default"},
     "modified": [],
     "added": ["a"],
     "removed": []
    }
   ]
 
 Error if style not readable:
 
 #if unix-permissions no-root
   $ touch q
   $ chmod 0 q
   $ hg log --style ./q
   abort: Permission denied: ./q
   [255]
 #endif
 
 Error if no style:
 
   $ hg log --style notexist
   abort: style 'notexist' not found
   (available styles: bisect, changelog, compact, default, phases, status, xml)
   [255]
 
   $ hg log -T list
   available styles: bisect, changelog, compact, default, phases, status, xml
   abort: specify a template
   [255]
 
 Error if style missing key:
 
   $ echo 'q = q' > t
   $ hg log --style ./t
   abort: "changeset" not in template map
   [255]
 
 Error if style missing value:
 
   $ echo 'changeset =' > t
   $ hg log --style t
   abort: t:1: missing value
   [255]
 
 Error if include fails:
 
   $ echo 'changeset = q' >> t
 #if unix-permissions no-root
   $ hg log --style ./t
   abort: template file ./q: Permission denied
   [255]
   $ rm q
 #endif
 
 Include works:
 
   $ echo '{rev}' > q
   $ hg log --style ./t
   8
   7
   6
   5
   4
   3
   2
   1
   0
 
 Check that {phase} works correctly on parents:
 
   $ cat << EOF > parentphase
   > changeset_debug = '{rev} ({phase}):{parents}\n'
   > parent = ' {rev} ({phase})'
   > EOF
   $ hg phase -r 5 --public
   $ hg phase -r 7 --secret --force
   $ hg log --debug -G --style ./parentphase
   @  8 (secret): 7 (secret) -1 (public)
   |
   o  7 (secret): -1 (public) -1 (public)
   
   o    6 (draft): 5 (public) 4 (draft)
   |\
   | o  5 (public): 3 (public) -1 (public)
   | |
   o |  4 (draft): 3 (public) -1 (public)
   |/
   o  3 (public): 2 (public) -1 (public)
   |
   o  2 (public): 1 (public) -1 (public)
   |
   o  1 (public): 0 (public) -1 (public)
   |
   o  0 (public): -1 (public) -1 (public)
   
 
 Missing non-standard names give no error (backward compatibility):
 
   $ echo "changeset = '{c}'" > t
   $ hg log --style ./t
 
 Defining non-standard name works:
 
   $ cat <<EOF > t
   > changeset = '{c}'
   > c = q
   > EOF
   $ hg log --style ./t
   8
   7
   6
   5
   4
   3
   2
   1
   0
 
 ui.style works:
 
   $ echo '[ui]' > .hg/hgrc
   $ echo 'style = t' >> .hg/hgrc
   $ hg log
   8
   7
   6
   5
   4
   3
   2
   1
   0
 
 
 Issue338:
 
   $ hg log --style=changelog > changelog
 
   $ cat changelog
   2020-01-01  test  <test>
   
   	* fourth, second, third:
   	third
   	[95c24699272e] [tip]
   
   1970-01-12  User Name  <user@hostname>
   
   	* second:
   	second
   	[29114dbae42b]
   
   1970-01-18  person  <person>
   
   	* merge
   	[d41e714fe50d]
   
   	* d:
   	new head
   	[13207e5a10d9]
   
   1970-01-17  person  <person>
   
   	* new branch
   	[bbe44766e73d] <foo>
   
   1970-01-16  person  <person>
   
   	* c:
   	no user, no domain
   	[10e46f2dcbf4]
   
   1970-01-14  other  <other@place>
   
   	* c:
   	no person
   	[97054abb4ab8]
   
   1970-01-13  A. N. Other  <other@place>
   
   	* b:
   	other 1 other 2
   
   	other 3
   	[b608e9d1a3f0]
   
   1970-01-12  User Name  <user@hostname>
   
   	* a:
   	line 1 line 2
   	[1e4e1b8f71e0]
   
 
 Issue2130: xml output for 'hg heads' is malformed
 
   $ hg heads --style changelog
   2020-01-01  test  <test>
   
   	* fourth, second, third:
   	third
   	[95c24699272e] [tip]
   
   1970-01-18  person  <person>
   
   	* merge
   	[d41e714fe50d]
   
   1970-01-17  person  <person>
   
   	* new branch
   	[bbe44766e73d] <foo>
   
 
 Keys work:
 
   $ for key in author branch branches date desc file_adds file_dels file_mods \
   >         file_copies file_copies_switch files \
   >         manifest node parents rev tags diffstat extras \
   >         p1rev p2rev p1node p2node; do
   >     for mode in '' --verbose --debug; do
   >         hg log $mode --template "$key$mode: {$key}\n"
   >     done
   > done
   author: test
   author: User Name <user@hostname>
   author: person
   author: person
   author: person
   author: person
   author: other@place
   author: A. N. Other <other@place>
   author: User Name <user@hostname>
   author--verbose: test
   author--verbose: User Name <user@hostname>
   author--verbose: person
   author--verbose: person
   author--verbose: person
   author--verbose: person
   author--verbose: other@place
   author--verbose: A. N. Other <other@place>
   author--verbose: User Name <user@hostname>
   author--debug: test
   author--debug: User Name <user@hostname>
   author--debug: person
   author--debug: person
   author--debug: person
   author--debug: person
   author--debug: other@place
   author--debug: A. N. Other <other@place>
   author--debug: User Name <user@hostname>
   branch: default
   branch: default
   branch: default
   branch: default
   branch: foo
   branch: default
   branch: default
   branch: default
   branch: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: foo
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branch--debug: foo
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branches: 
   branches: 
   branches: 
   branches: 
   branches: foo
   branches: 
   branches: 
   branches: 
   branches: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: foo
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--debug: 
   branches--debug: 
   branches--debug: 
   branches--debug: 
   branches--debug: foo
   branches--debug: 
   branches--debug: 
   branches--debug: 
   branches--debug: 
   date: 1577872860.00
   date: 1000000.00
   date: 1500001.00
   date: 1500000.00
   date: 1400000.00
   date: 1300000.00
   date: 1200000.00
   date: 1100000.00
   date: 1000000.00
   date--verbose: 1577872860.00
   date--verbose: 1000000.00
   date--verbose: 1500001.00
   date--verbose: 1500000.00
   date--verbose: 1400000.00
   date--verbose: 1300000.00
   date--verbose: 1200000.00
   date--verbose: 1100000.00
   date--verbose: 1000000.00
   date--debug: 1577872860.00
   date--debug: 1000000.00
   date--debug: 1500001.00
   date--debug: 1500000.00
   date--debug: 1400000.00
   date--debug: 1300000.00
   date--debug: 1200000.00
   date--debug: 1100000.00
   date--debug: 1000000.00
   desc: third
   desc: second
   desc: merge
   desc: new head
   desc: new branch
   desc: no user, no domain
   desc: no person
   desc: other 1
   other 2
   
   other 3
   desc: line 1
   line 2
   desc--verbose: third
   desc--verbose: second
   desc--verbose: merge
   desc--verbose: new head
   desc--verbose: new branch
   desc--verbose: no user, no domain
   desc--verbose: no person
   desc--verbose: other 1
   other 2
   
   other 3
   desc--verbose: line 1
   line 2
   desc--debug: third
   desc--debug: second
   desc--debug: merge
   desc--debug: new head
   desc--debug: new branch
   desc--debug: no user, no domain
   desc--debug: no person
   desc--debug: other 1
   other 2
   
   other 3
   desc--debug: line 1
   line 2
   file_adds: fourth third
   file_adds: second
   file_adds: 
   file_adds: d
   file_adds: 
   file_adds: 
   file_adds: c
   file_adds: b
   file_adds: a
   file_adds--verbose: fourth third
   file_adds--verbose: second
   file_adds--verbose: 
   file_adds--verbose: d
   file_adds--verbose: 
   file_adds--verbose: 
   file_adds--verbose: c
   file_adds--verbose: b
   file_adds--verbose: a
   file_adds--debug: fourth third
   file_adds--debug: second
   file_adds--debug: 
   file_adds--debug: d
   file_adds--debug: 
   file_adds--debug: 
   file_adds--debug: c
   file_adds--debug: b
   file_adds--debug: a
   file_dels: second
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels--verbose: second
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--debug: second
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods: c
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: c
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: c
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_copies: fourth (second)
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies--verbose: fourth (second)
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--debug: fourth (second)
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   files: fourth second third
   files: second
   files: 
   files: d
   files: 
   files: c
   files: c
   files: b
   files: a
   files--verbose: fourth second third
   files--verbose: second
   files--verbose: 
   files--verbose: d
   files--verbose: 
   files--verbose: c
   files--verbose: c
   files--verbose: b
   files--verbose: a
   files--debug: fourth second third
   files--debug: second
   files--debug: 
   files--debug: d
   files--debug: 
   files--debug: c
   files--debug: c
   files--debug: b
   files--debug: a
   manifest: 6:94961b75a2da
   manifest: 5:f2dbc354b94e
   manifest: 4:4dc3def4f9b4
   manifest: 4:4dc3def4f9b4
   manifest: 3:cb5a1327723b
   manifest: 3:cb5a1327723b
   manifest: 2:6e0e82995c35
   manifest: 1:4e8d705b1e53
   manifest: 0:a0c8bcbbb45c
   manifest--verbose: 6:94961b75a2da
   manifest--verbose: 5:f2dbc354b94e
   manifest--verbose: 4:4dc3def4f9b4
   manifest--verbose: 4:4dc3def4f9b4
   manifest--verbose: 3:cb5a1327723b
   manifest--verbose: 3:cb5a1327723b
   manifest--verbose: 2:6e0e82995c35
   manifest--verbose: 1:4e8d705b1e53
   manifest--verbose: 0:a0c8bcbbb45c
   manifest--debug: 6:94961b75a2da554b4df6fb599e5bfc7d48de0c64
   manifest--debug: 5:f2dbc354b94e5ec0b4f10680ee0cee816101d0bf
   manifest--debug: 4:4dc3def4f9b4c6e8de820f6ee74737f91e96a216
   manifest--debug: 4:4dc3def4f9b4c6e8de820f6ee74737f91e96a216
   manifest--debug: 3:cb5a1327723bada42f117e4c55a303246eaf9ccc
   manifest--debug: 3:cb5a1327723bada42f117e4c55a303246eaf9ccc
   manifest--debug: 2:6e0e82995c35d0d57a52aca8da4e56139e06b4b1
   manifest--debug: 1:4e8d705b1e53e3f9375e0e60dc7b525d8211fe55
   manifest--debug: 0:a0c8bcbbb45c63b90b70ad007bf38961f64f2af0
   node: 95c24699272ef57d062b8bccc32c878bf841784a
   node: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   node: d41e714fe50d9e4a5f11b4d595d543481b5f980b
   node: 13207e5a10d9fd28ec424934298e176197f2c67f
   node: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   node: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   node: 97054abb4ab824450e9164180baf491ae0078465
   node: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   node: 1e4e1b8f71e05681d422154f5421e385fec3454f
   node--verbose: 95c24699272ef57d062b8bccc32c878bf841784a
   node--verbose: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   node--verbose: d41e714fe50d9e4a5f11b4d595d543481b5f980b
   node--verbose: 13207e5a10d9fd28ec424934298e176197f2c67f
   node--verbose: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   node--verbose: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   node--verbose: 97054abb4ab824450e9164180baf491ae0078465
   node--verbose: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   node--verbose: 1e4e1b8f71e05681d422154f5421e385fec3454f
   node--debug: 95c24699272ef57d062b8bccc32c878bf841784a
   node--debug: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   node--debug: d41e714fe50d9e4a5f11b4d595d543481b5f980b
   node--debug: 13207e5a10d9fd28ec424934298e176197f2c67f
   node--debug: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   node--debug: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   node--debug: 97054abb4ab824450e9164180baf491ae0078465
   node--debug: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   node--debug: 1e4e1b8f71e05681d422154f5421e385fec3454f
   parents: 
   parents: -1:000000000000 
   parents: 5:13207e5a10d9 4:bbe44766e73d 
   parents: 3:10e46f2dcbf4 
   parents: 
   parents: 
   parents: 
   parents: 
   parents: 
   parents--verbose: 
   parents--verbose: -1:000000000000 
   parents--verbose: 5:13207e5a10d9 4:bbe44766e73d 
   parents--verbose: 3:10e46f2dcbf4 
   parents--verbose: 
   parents--verbose: 
   parents--verbose: 
   parents--verbose: 
   parents--verbose: 
   parents--debug: 7:29114dbae42b9f078cf2714dbe3a86bba8ec7453 -1:0000000000000000000000000000000000000000 
   parents--debug: -1:0000000000000000000000000000000000000000 -1:0000000000000000000000000000000000000000 
   parents--debug: 5:13207e5a10d9fd28ec424934298e176197f2c67f 4:bbe44766e73d5f11ed2177f1838de10c53ef3e74 
   parents--debug: 3:10e46f2dcbf4823578cf180f33ecf0b957964c47 -1:0000000000000000000000000000000000000000 
   parents--debug: 3:10e46f2dcbf4823578cf180f33ecf0b957964c47 -1:0000000000000000000000000000000000000000 
   parents--debug: 2:97054abb4ab824450e9164180baf491ae0078465 -1:0000000000000000000000000000000000000000 
   parents--debug: 1:b608e9d1a3f0273ccf70fb85fd6866b3482bf965 -1:0000000000000000000000000000000000000000 
   parents--debug: 0:1e4e1b8f71e05681d422154f5421e385fec3454f -1:0000000000000000000000000000000000000000 
   parents--debug: -1:0000000000000000000000000000000000000000 -1:0000000000000000000000000000000000000000 
   rev: 8
   rev: 7
   rev: 6
   rev: 5
   rev: 4
   rev: 3
   rev: 2
   rev: 1
   rev: 0
   rev--verbose: 8
   rev--verbose: 7
   rev--verbose: 6
   rev--verbose: 5
   rev--verbose: 4
   rev--verbose: 3
   rev--verbose: 2
   rev--verbose: 1
   rev--verbose: 0
   rev--debug: 8
   rev--debug: 7
   rev--debug: 6
   rev--debug: 5
   rev--debug: 4
   rev--debug: 3
   rev--debug: 2
   rev--debug: 1
   rev--debug: 0
   tags: tip
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags--verbose: tip
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--debug: tip
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   diffstat: 3: +2/-1
   diffstat: 1: +1/-0
   diffstat: 0: +0/-0
   diffstat: 1: +1/-0
   diffstat: 0: +0/-0
   diffstat: 1: +1/-0
   diffstat: 1: +4/-0
   diffstat: 1: +2/-0
   diffstat: 1: +1/-0
   diffstat--verbose: 3: +2/-1
   diffstat--verbose: 1: +1/-0
   diffstat--verbose: 0: +0/-0
   diffstat--verbose: 1: +1/-0
   diffstat--verbose: 0: +0/-0
   diffstat--verbose: 1: +1/-0
   diffstat--verbose: 1: +4/-0
   diffstat--verbose: 1: +2/-0
   diffstat--verbose: 1: +1/-0
   diffstat--debug: 3: +2/-1
   diffstat--debug: 1: +1/-0
   diffstat--debug: 0: +0/-0
   diffstat--debug: 1: +1/-0
   diffstat--debug: 0: +0/-0
   diffstat--debug: 1: +1/-0
   diffstat--debug: 1: +4/-0
   diffstat--debug: 1: +2/-0
   diffstat--debug: 1: +1/-0
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras: branch=foo
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=foo
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=foo
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   p1rev: 7
   p1rev: -1
   p1rev: 5
   p1rev: 3
   p1rev: 3
   p1rev: 2
   p1rev: 1
   p1rev: 0
   p1rev: -1
   p1rev--verbose: 7
   p1rev--verbose: -1
   p1rev--verbose: 5
   p1rev--verbose: 3
   p1rev--verbose: 3
   p1rev--verbose: 2
   p1rev--verbose: 1
   p1rev--verbose: 0
   p1rev--verbose: -1
   p1rev--debug: 7
   p1rev--debug: -1
   p1rev--debug: 5
   p1rev--debug: 3
   p1rev--debug: 3
   p1rev--debug: 2
   p1rev--debug: 1
   p1rev--debug: 0
   p1rev--debug: -1
   p2rev: -1
   p2rev: -1
   p2rev: 4
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: 4
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: 4
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p1node: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   p1node: 0000000000000000000000000000000000000000
   p1node: 13207e5a10d9fd28ec424934298e176197f2c67f
   p1node: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node: 97054abb4ab824450e9164180baf491ae0078465
   p1node: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   p1node: 1e4e1b8f71e05681d422154f5421e385fec3454f
   p1node: 0000000000000000000000000000000000000000
   p1node--verbose: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   p1node--verbose: 0000000000000000000000000000000000000000
   p1node--verbose: 13207e5a10d9fd28ec424934298e176197f2c67f
   p1node--verbose: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--verbose: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--verbose: 97054abb4ab824450e9164180baf491ae0078465
   p1node--verbose: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   p1node--verbose: 1e4e1b8f71e05681d422154f5421e385fec3454f
   p1node--verbose: 0000000000000000000000000000000000000000
   p1node--debug: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   p1node--debug: 0000000000000000000000000000000000000000
   p1node--debug: 13207e5a10d9fd28ec424934298e176197f2c67f
   p1node--debug: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--debug: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--debug: 97054abb4ab824450e9164180baf491ae0078465
   p1node--debug: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   p1node--debug: 1e4e1b8f71e05681d422154f5421e385fec3454f
   p1node--debug: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
 
 Filters work:
 
   $ hg log --template '{author|domain}\n'
   
   hostname
   
   
   
   
   place
   place
   hostname
 
   $ hg log --template '{author|person}\n'
   test
   User Name
   person
   person
   person
   person
   other
   A. N. Other
   User Name
 
   $ hg log --template '{author|user}\n'
   test
   user
   person
   person
   person
   person
   other
   other
   user
 
   $ hg log --template '{date|date}\n'
   Wed Jan 01 10:01:00 2020 +0000
   Mon Jan 12 13:46:40 1970 +0000
   Sun Jan 18 08:40:01 1970 +0000
   Sun Jan 18 08:40:00 1970 +0000
   Sat Jan 17 04:53:20 1970 +0000
   Fri Jan 16 01:06:40 1970 +0000
   Wed Jan 14 21:20:00 1970 +0000
   Tue Jan 13 17:33:20 1970 +0000
   Mon Jan 12 13:46:40 1970 +0000
 
   $ hg log --template '{date|isodate}\n'
   2020-01-01 10:01 +0000
   1970-01-12 13:46 +0000
   1970-01-18 08:40 +0000
   1970-01-18 08:40 +0000
   1970-01-17 04:53 +0000
   1970-01-16 01:06 +0000
   1970-01-14 21:20 +0000
   1970-01-13 17:33 +0000
   1970-01-12 13:46 +0000
 
   $ hg log --template '{date|isodatesec}\n'
   2020-01-01 10:01:00 +0000
   1970-01-12 13:46:40 +0000
   1970-01-18 08:40:01 +0000
   1970-01-18 08:40:00 +0000
   1970-01-17 04:53:20 +0000
   1970-01-16 01:06:40 +0000
   1970-01-14 21:20:00 +0000
   1970-01-13 17:33:20 +0000
   1970-01-12 13:46:40 +0000
 
   $ hg log --template '{date|rfc822date}\n'
   Wed, 01 Jan 2020 10:01:00 +0000
   Mon, 12 Jan 1970 13:46:40 +0000
   Sun, 18 Jan 1970 08:40:01 +0000
   Sun, 18 Jan 1970 08:40:00 +0000
   Sat, 17 Jan 1970 04:53:20 +0000
   Fri, 16 Jan 1970 01:06:40 +0000
   Wed, 14 Jan 1970 21:20:00 +0000
   Tue, 13 Jan 1970 17:33:20 +0000
   Mon, 12 Jan 1970 13:46:40 +0000
 
   $ hg log --template '{desc|firstline}\n'
   third
   second
   merge
   new head
   new branch
   no user, no domain
   no person
   other 1
   line 1
 
   $ hg log --template '{node|short}\n'
   95c24699272e
   29114dbae42b
   d41e714fe50d
   13207e5a10d9
   bbe44766e73d
   10e46f2dcbf4
   97054abb4ab8
   b608e9d1a3f0
   1e4e1b8f71e0
 
   $ hg log --template '<changeset author="{author|xmlescape}"/>\n'
   <changeset author="test"/>
   <changeset author="User Name &lt;user@hostname&gt;"/>
   <changeset author="person"/>
   <changeset author="person"/>
   <changeset author="person"/>
   <changeset author="person"/>
   <changeset author="other@place"/>
   <changeset author="A. N. Other &lt;other@place&gt;"/>
   <changeset author="User Name &lt;user@hostname&gt;"/>
 
   $ hg log --template '{rev}: {children}\n'
   8: 
   7: 8:95c24699272e
   6: 
   5: 6:d41e714fe50d
   4: 6:d41e714fe50d
   3: 4:bbe44766e73d 5:13207e5a10d9
   2: 3:10e46f2dcbf4
   1: 2:97054abb4ab8
   0: 1:b608e9d1a3f0
 
 Formatnode filter works:
 
   $ hg -q log -r 0 --template '{node|formatnode}\n'
   1e4e1b8f71e0
 
   $ hg log -r 0 --template '{node|formatnode}\n'
   1e4e1b8f71e0
 
   $ hg -v log -r 0 --template '{node|formatnode}\n'
   1e4e1b8f71e0
 
   $ hg --debug log -r 0 --template '{node|formatnode}\n'
   1e4e1b8f71e05681d422154f5421e385fec3454f
 
 Age filter:
 
   $ hg init unstable-hash
   $ cd unstable-hash
   $ hg log --template '{date|age}\n' > /dev/null || exit 1
 
   >>> from datetime import datetime, timedelta
   >>> fp = open('a', 'w')
   >>> n = datetime.now() + timedelta(366 * 7)
   >>> fp.write('%d-%d-%d 00:00' % (n.year, n.month, n.day))
   >>> fp.close()
   $ hg add a
   $ hg commit -m future -d "`cat a`"
 
   $ hg log -l1 --template '{date|age}\n'
   7 years from now
 
   $ cd ..
   $ rm -rf unstable-hash
 
 Add a dummy commit to make up for the instability of the above:
 
   $ echo a > a
   $ hg add a
   $ hg ci -m future
 
 Count filter:
 
   $ hg log -l1 --template '{node|count} {node|short|count}\n'
   40 12
 
   $ hg log -l1 --template '{revset("null^")|count} {revset(".")|count} {revset("0::3")|count}\n'
   0 1 4
 
   $ hg log -G --template '{rev}: children: {children|count}, \
   > tags: {tags|count}, file_adds: {file_adds|count}, \
   > ancestors: {revset("ancestors(%s)", rev)|count}'
   @  9: children: 0, tags: 1, file_adds: 1, ancestors: 3
   |
   o  8: children: 1, tags: 0, file_adds: 2, ancestors: 2
   |
   o  7: children: 1, tags: 0, file_adds: 1, ancestors: 1
   
   o    6: children: 0, tags: 0, file_adds: 0, ancestors: 7
   |\
   | o  5: children: 1, tags: 0, file_adds: 1, ancestors: 5
   | |
   o |  4: children: 1, tags: 0, file_adds: 0, ancestors: 5
   |/
   o  3: children: 2, tags: 0, file_adds: 0, ancestors: 4
   |
   o  2: children: 1, tags: 0, file_adds: 1, ancestors: 3
   |
   o  1: children: 1, tags: 0, file_adds: 1, ancestors: 2
   |
   o  0: children: 1, tags: 0, file_adds: 1, ancestors: 1
   
 
 Upper/lower filters:
 
   $ hg log -r0 --template '{branch|upper}\n'
   DEFAULT
   $ hg log -r0 --template '{author|lower}\n'
   user name <user@hostname>
   $ hg log -r0 --template '{date|upper}\n'
   abort: template filter 'upper' is not compatible with keyword 'date'
   [255]
 
 Add a commit that does all possible modifications at once
 
   $ echo modify >> third
   $ touch b
   $ hg add b
   $ hg mv fourth fifth
   $ hg rm a
   $ hg ci -m "Modify, add, remove, rename"
 
 Check the status template
 
   $ cat <<EOF >> $HGRCPATH
   > [extensions]
   > color=
   > EOF
 
   $ hg log -T status -r 10
   changeset:   10:0f9759ec227a
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     Modify, add, remove, rename
   files:
   M third
   A b
   A fifth
   R a
   R fourth
   
   $ hg log -T status -C -r 10
   changeset:   10:0f9759ec227a
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     Modify, add, remove, rename
   files:
   M third
   A b
   A fifth
     fourth
   R a
   R fourth
   
   $ hg log -T status -C -r 10 -v
   changeset:   10:0f9759ec227a
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   description:
   Modify, add, remove, rename
   
   files:
   M third
   A b
   A fifth
     fourth
   R a
   R fourth
   
   $ hg log -T status -C -r 10 --debug
   changeset:   10:0f9759ec227a4859c2014a345cd8a859022b7c6c
   tag:         tip
   phase:       secret
   parent:      9:bf9dfba36635106d6a73ccc01e28b762da60e066
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    8:89dd546f2de0a9d6d664f58d86097eb97baba567
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   extra:       branch=default
   description:
   Modify, add, remove, rename
   
   files:
   M third
   A b
   A fifth
     fourth
   R a
   R fourth
   
   $ hg log -T status -C -r 10 --quiet
   10:0f9759ec227a
   $ hg --color=debug log -T status -r 10
   [log.changeset changeset.secret|changeset:   10:0f9759ec227a]
   [log.tag|tag:         tip]
   [log.user|user:        test]
   [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
   [log.summary|summary:     Modify, add, remove, rename]
   [ui.note log.files|files:]
   [status.modified|M third]
   [status.added|A b]
   [status.added|A fifth]
   [status.removed|R a]
   [status.removed|R fourth]
   
   $ hg --color=debug log -T status -C -r 10
   [log.changeset changeset.secret|changeset:   10:0f9759ec227a]
   [log.tag|tag:         tip]
   [log.user|user:        test]
   [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
   [log.summary|summary:     Modify, add, remove, rename]
   [ui.note log.files|files:]
   [status.modified|M third]
   [status.added|A b]
   [status.added|A fifth]
   [status.copied|  fourth]
   [status.removed|R a]
   [status.removed|R fourth]
   
   $ hg --color=debug log -T status -C -r 10 -v
   [log.changeset changeset.secret|changeset:   10:0f9759ec227a]
   [log.tag|tag:         tip]
   [log.user|user:        test]
   [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
   [ui.note log.description|description:]
   [ui.note log.description|Modify, add, remove, rename]
   
   [ui.note log.files|files:]
   [status.modified|M third]
   [status.added|A b]
   [status.added|A fifth]
   [status.copied|  fourth]
   [status.removed|R a]
   [status.removed|R fourth]
   
   $ hg --color=debug log -T status -C -r 10 --debug
   [log.changeset changeset.secret|changeset:   10:0f9759ec227a4859c2014a345cd8a859022b7c6c]
   [log.tag|tag:         tip]
   [log.phase|phase:       secret]
   [log.parent changeset.secret|parent:      9:bf9dfba36635106d6a73ccc01e28b762da60e066]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [ui.debug log.manifest|manifest:    8:89dd546f2de0a9d6d664f58d86097eb97baba567]
   [log.user|user:        test]
   [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
   [ui.debug log.extra|extra:       branch=default]
   [ui.note log.description|description:]
   [ui.note log.description|Modify, add, remove, rename]
   
   [ui.note log.files|files:]
   [status.modified|M third]
   [status.added|A b]
   [status.added|A fifth]
   [status.copied|  fourth]
   [status.removed|R a]
   [status.removed|R fourth]
   
   $ hg --color=debug log -T status -C -r 10 --quiet
   [log.node|10:0f9759ec227a]
 
 Check the bisect template
 
   $ hg bisect -g 1
   $ hg bisect -b 3 --noupdate
   Testing changeset 2:97054abb4ab8 (2 changesets remaining, ~1 tests)
   $ hg log -T bisect -r 0:4
   changeset:   0:1e4e1b8f71e0
   bisect:      good (implicit)
   user:        User Name <user@hostname>
   date:        Mon Jan 12 13:46:40 1970 +0000
   summary:     line 1
   
   changeset:   1:b608e9d1a3f0
   bisect:      good
   user:        A. N. Other <other@place>
   date:        Tue Jan 13 17:33:20 1970 +0000
   summary:     other 1
   
   changeset:   2:97054abb4ab8
   bisect:      untested
   user:        other@place
   date:        Wed Jan 14 21:20:00 1970 +0000
   summary:     no person
   
   changeset:   3:10e46f2dcbf4
   bisect:      bad
   user:        person
   date:        Fri Jan 16 01:06:40 1970 +0000
   summary:     no user, no domain
   
   changeset:   4:bbe44766e73d
   bisect:      bad (implicit)
   branch:      foo
   user:        person
   date:        Sat Jan 17 04:53:20 1970 +0000
   summary:     new branch
   
   $ hg log --debug -T bisect -r 0:4
   changeset:   0:1e4e1b8f71e05681d422154f5421e385fec3454f
   bisect:      good (implicit)
   phase:       public
   parent:      -1:0000000000000000000000000000000000000000
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    0:a0c8bcbbb45c63b90b70ad007bf38961f64f2af0
   user:        User Name <user@hostname>
   date:        Mon Jan 12 13:46:40 1970 +0000
   files+:      a
   extra:       branch=default
   description:
   line 1
   line 2
   
   
   changeset:   1:b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   bisect:      good
   phase:       public
   parent:      0:1e4e1b8f71e05681d422154f5421e385fec3454f
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    1:4e8d705b1e53e3f9375e0e60dc7b525d8211fe55
   user:        A. N. Other <other@place>
   date:        Tue Jan 13 17:33:20 1970 +0000
   files+:      b
   extra:       branch=default
   description:
   other 1
   other 2
   
   other 3
   
   
   changeset:   2:97054abb4ab824450e9164180baf491ae0078465
   bisect:      untested
   phase:       public
   parent:      1:b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    2:6e0e82995c35d0d57a52aca8da4e56139e06b4b1
   user:        other@place
   date:        Wed Jan 14 21:20:00 1970 +0000
   files+:      c
   extra:       branch=default
   description:
   no person
   
   
   changeset:   3:10e46f2dcbf4823578cf180f33ecf0b957964c47
   bisect:      bad
   phase:       public
   parent:      2:97054abb4ab824450e9164180baf491ae0078465
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    3:cb5a1327723bada42f117e4c55a303246eaf9ccc
   user:        person
   date:        Fri Jan 16 01:06:40 1970 +0000
   files:       c
   extra:       branch=default
   description:
   no user, no domain
   
   
   changeset:   4:bbe44766e73d5f11ed2177f1838de10c53ef3e74
   bisect:      bad (implicit)
   branch:      foo
   phase:       draft
   parent:      3:10e46f2dcbf4823578cf180f33ecf0b957964c47
   parent:      -1:0000000000000000000000000000000000000000
   manifest:    3:cb5a1327723bada42f117e4c55a303246eaf9ccc
   user:        person
   date:        Sat Jan 17 04:53:20 1970 +0000
   extra:       branch=foo
   description:
   new branch
   
   
   $ hg log -v -T bisect -r 0:4
   changeset:   0:1e4e1b8f71e0
   bisect:      good (implicit)
   user:        User Name <user@hostname>
   date:        Mon Jan 12 13:46:40 1970 +0000
   files:       a
   description:
   line 1
   line 2
   
   
   changeset:   1:b608e9d1a3f0
   bisect:      good
   user:        A. N. Other <other@place>
   date:        Tue Jan 13 17:33:20 1970 +0000
   files:       b
   description:
   other 1
   other 2
   
   other 3
   
   
   changeset:   2:97054abb4ab8
   bisect:      untested
   user:        other@place
   date:        Wed Jan 14 21:20:00 1970 +0000
   files:       c
   description:
   no person
   
   
   changeset:   3:10e46f2dcbf4
   bisect:      bad
   user:        person
   date:        Fri Jan 16 01:06:40 1970 +0000
   files:       c
   description:
   no user, no domain
   
   
   changeset:   4:bbe44766e73d
   bisect:      bad (implicit)
   branch:      foo
   user:        person
   date:        Sat Jan 17 04:53:20 1970 +0000
   description:
   new branch
   
   
   $ hg --color=debug log -T bisect -r 0:4
   [log.changeset changeset.public|changeset:   0:1e4e1b8f71e0]
   [log.bisect bisect.good|bisect:      good (implicit)]
   [log.user|user:        User Name <user@hostname>]
   [log.date|date:        Mon Jan 12 13:46:40 1970 +0000]
   [log.summary|summary:     line 1]
   
   [log.changeset changeset.public|changeset:   1:b608e9d1a3f0]
   [log.bisect bisect.good|bisect:      good]
   [log.user|user:        A. N. Other <other@place>]
   [log.date|date:        Tue Jan 13 17:33:20 1970 +0000]
   [log.summary|summary:     other 1]
   
   [log.changeset changeset.public|changeset:   2:97054abb4ab8]
   [log.bisect bisect.untested|bisect:      untested]
   [log.user|user:        other@place]
   [log.date|date:        Wed Jan 14 21:20:00 1970 +0000]
   [log.summary|summary:     no person]
   
   [log.changeset changeset.public|changeset:   3:10e46f2dcbf4]
   [log.bisect bisect.bad|bisect:      bad]
   [log.user|user:        person]
   [log.date|date:        Fri Jan 16 01:06:40 1970 +0000]
   [log.summary|summary:     no user, no domain]
   
   [log.changeset changeset.draft|changeset:   4:bbe44766e73d]
   [log.bisect bisect.bad|bisect:      bad (implicit)]
   [log.branch|branch:      foo]
   [log.user|user:        person]
   [log.date|date:        Sat Jan 17 04:53:20 1970 +0000]
   [log.summary|summary:     new branch]
   
   $ hg --color=debug log --debug -T bisect -r 0:4
   [log.changeset changeset.public|changeset:   0:1e4e1b8f71e05681d422154f5421e385fec3454f]
   [log.bisect bisect.good|bisect:      good (implicit)]
   [log.phase|phase:       public]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [ui.debug log.manifest|manifest:    0:a0c8bcbbb45c63b90b70ad007bf38961f64f2af0]
   [log.user|user:        User Name <user@hostname>]
   [log.date|date:        Mon Jan 12 13:46:40 1970 +0000]
   [ui.debug log.files|files+:      a]
   [ui.debug log.extra|extra:       branch=default]
   [ui.note log.description|description:]
   [ui.note log.description|line 1
   line 2]
   
   
   [log.changeset changeset.public|changeset:   1:b608e9d1a3f0273ccf70fb85fd6866b3482bf965]
   [log.bisect bisect.good|bisect:      good]
   [log.phase|phase:       public]
   [log.parent changeset.public|parent:      0:1e4e1b8f71e05681d422154f5421e385fec3454f]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [ui.debug log.manifest|manifest:    1:4e8d705b1e53e3f9375e0e60dc7b525d8211fe55]
   [log.user|user:        A. N. Other <other@place>]
   [log.date|date:        Tue Jan 13 17:33:20 1970 +0000]
   [ui.debug log.files|files+:      b]
   [ui.debug log.extra|extra:       branch=default]
   [ui.note log.description|description:]
   [ui.note log.description|other 1
   other 2
   
   other 3]
   
   
   [log.changeset changeset.public|changeset:   2:97054abb4ab824450e9164180baf491ae0078465]
   [log.bisect bisect.untested|bisect:      untested]
   [log.phase|phase:       public]
   [log.parent changeset.public|parent:      1:b608e9d1a3f0273ccf70fb85fd6866b3482bf965]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [ui.debug log.manifest|manifest:    2:6e0e82995c35d0d57a52aca8da4e56139e06b4b1]
   [log.user|user:        other@place]
   [log.date|date:        Wed Jan 14 21:20:00 1970 +0000]
   [ui.debug log.files|files+:      c]
   [ui.debug log.extra|extra:       branch=default]
   [ui.note log.description|description:]
   [ui.note log.description|no person]
   
   
   [log.changeset changeset.public|changeset:   3:10e46f2dcbf4823578cf180f33ecf0b957964c47]
   [log.bisect bisect.bad|bisect:      bad]
   [log.phase|phase:       public]
   [log.parent changeset.public|parent:      2:97054abb4ab824450e9164180baf491ae0078465]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [ui.debug log.manifest|manifest:    3:cb5a1327723bada42f117e4c55a303246eaf9ccc]
   [log.user|user:        person]
   [log.date|date:        Fri Jan 16 01:06:40 1970 +0000]
   [ui.debug log.files|files:       c]
   [ui.debug log.extra|extra:       branch=default]
   [ui.note log.description|description:]
   [ui.note log.description|no user, no domain]
   
   
   [log.changeset changeset.draft|changeset:   4:bbe44766e73d5f11ed2177f1838de10c53ef3e74]
   [log.bisect bisect.bad|bisect:      bad (implicit)]
   [log.branch|branch:      foo]
   [log.phase|phase:       draft]
   [log.parent changeset.public|parent:      3:10e46f2dcbf4823578cf180f33ecf0b957964c47]
   [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
   [ui.debug log.manifest|manifest:    3:cb5a1327723bada42f117e4c55a303246eaf9ccc]
   [log.user|user:        person]
   [log.date|date:        Sat Jan 17 04:53:20 1970 +0000]
   [ui.debug log.extra|extra:       branch=foo]
   [ui.note log.description|description:]
   [ui.note log.description|new branch]
   
   
   $ hg --color=debug log -v -T bisect -r 0:4
   [log.changeset changeset.public|changeset:   0:1e4e1b8f71e0]
   [log.bisect bisect.good|bisect:      good (implicit)]
   [log.user|user:        User Name <user@hostname>]
   [log.date|date:        Mon Jan 12 13:46:40 1970 +0000]
   [ui.note log.files|files:       a]
   [ui.note log.description|description:]
   [ui.note log.description|line 1
   line 2]
   
   
   [log.changeset changeset.public|changeset:   1:b608e9d1a3f0]
   [log.bisect bisect.good|bisect:      good]
   [log.user|user:        A. N. Other <other@place>]
   [log.date|date:        Tue Jan 13 17:33:20 1970 +0000]
   [ui.note log.files|files:       b]
   [ui.note log.description|description:]
   [ui.note log.description|other 1
   other 2
   
   other 3]
   
   
   [log.changeset changeset.public|changeset:   2:97054abb4ab8]
   [log.bisect bisect.untested|bisect:      untested]
   [log.user|user:        other@place]
   [log.date|date:        Wed Jan 14 21:20:00 1970 +0000]
   [ui.note log.files|files:       c]
   [ui.note log.description|description:]
   [ui.note log.description|no person]
   
   
   [log.changeset changeset.public|changeset:   3:10e46f2dcbf4]
   [log.bisect bisect.bad|bisect:      bad]
   [log.user|user:        person]
   [log.date|date:        Fri Jan 16 01:06:40 1970 +0000]
   [ui.note log.files|files:       c]
   [ui.note log.description|description:]
   [ui.note log.description|no user, no domain]
   
   
   [log.changeset changeset.draft|changeset:   4:bbe44766e73d]
   [log.bisect bisect.bad|bisect:      bad (implicit)]
   [log.branch|branch:      foo]
   [log.user|user:        person]
   [log.date|date:        Sat Jan 17 04:53:20 1970 +0000]
   [ui.note log.description|description:]
   [ui.note log.description|new branch]
   
   
   $ hg bisect --reset
 
 Error on syntax:
 
   $ echo 'x = "f' >> t
   $ hg log
   abort: t:3: unmatched quotes
   [255]
 
   $ hg log -T '{date'
   hg: parse error at 1: unterminated template expansion
   [255]
 
 Behind the scenes, this will throw TypeError
 
   $ hg log -l 3 --template '{date|obfuscate}\n'
   abort: template filter 'obfuscate' is not compatible with keyword 'date'
   [255]
 
 Behind the scenes, this will throw a ValueError
 
   $ hg log -l 3 --template 'line: {desc|shortdate}\n'
   abort: template filter 'shortdate' is not compatible with keyword 'desc'
   [255]
 
 Behind the scenes, this will throw AttributeError
 
   $ hg log -l 3 --template 'line: {date|escape}\n'
   abort: template filter 'escape' is not compatible with keyword 'date'
   [255]
 
   $ hg log -l 3 --template 'line: {extras|localdate}\n'
   hg: parse error: localdate expects a date information
   [255]
 
 Behind the scenes, this will throw ValueError
 
   $ hg tip --template '{author|email|date}\n'
   hg: parse error: date expects a date information
   [255]
 
 Error in nested template:
 
   $ hg log -T '{"date'
   hg: parse error at 2: unterminated string
   [255]
 
   $ hg log -T '{"foo{date|=}"}'
   hg: parse error at 11: syntax error
   [255]
 
 Thrown an error if a template function doesn't exist
 
   $ hg tip --template '{foo()}\n'
   hg: parse error: unknown function 'foo'
   [255]
 
 Pass generator object created by template function to filter
 
   $ hg log -l 1 --template '{if(author, author)|user}\n'
   test
 
 Test diff function:
 
   $ hg diff -c 8
   diff -r 29114dbae42b -r 95c24699272e fourth
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +second
   diff -r 29114dbae42b -r 95c24699272e second
   --- a/second	Mon Jan 12 13:46:40 1970 +0000
   +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +0,0 @@
   -second
   diff -r 29114dbae42b -r 95c24699272e third
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/third	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +third
 
   $ hg log -r 8 -T "{diff()}"
   diff -r 29114dbae42b -r 95c24699272e fourth
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +second
   diff -r 29114dbae42b -r 95c24699272e second
   --- a/second	Mon Jan 12 13:46:40 1970 +0000
   +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +0,0 @@
   -second
   diff -r 29114dbae42b -r 95c24699272e third
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/third	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +third
 
   $ hg log -r 8 -T "{diff('glob:f*')}"
   diff -r 29114dbae42b -r 95c24699272e fourth
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +second
 
   $ hg log -r 8 -T "{diff('', 'glob:f*')}"
   diff -r 29114dbae42b -r 95c24699272e second
   --- a/second	Mon Jan 12 13:46:40 1970 +0000
   +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +0,0 @@
   -second
   diff -r 29114dbae42b -r 95c24699272e third
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/third	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +third
 
   $ hg log -r 8 -T "{diff('FOURTH'|lower)}"
   diff -r 29114dbae42b -r 95c24699272e fourth
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/fourth	Wed Jan 01 10:01:00 2020 +0000
   @@ -0,0 +1,1 @@
   +second
 
   $ cd ..
 
 
 latesttag:
 
   $ hg init latesttag
   $ cd latesttag
 
   $ echo a > file
   $ hg ci -Am a -d '0 0'
   adding file
 
   $ echo b >> file
   $ hg ci -m b -d '1 0'
 
   $ echo c >> head1
   $ hg ci -Am h1c -d '2 0'
   adding head1
 
   $ hg update -q 1
   $ echo d >> head2
   $ hg ci -Am h2d -d '3 0'
   adding head2
   created new head
 
   $ echo e >> head2
   $ hg ci -m h2e -d '4 0'
 
   $ hg merge -q
   $ hg ci -m merge -d '5 -3600'
 
 No tag set:
 
   $ hg log --template '{rev}: {latesttag}+{latesttagdistance}\n'
   5: null+5
   4: null+4
   3: null+3
   2: null+3
   1: null+2
   0: null+1
 
 One common tag: longest path wins:
 
   $ hg tag -r 1 -m t1 -d '6 0' t1
   $ hg log --template '{rev}: {latesttag}+{latesttagdistance}\n'
   6: t1+4
   5: t1+3
   4: t1+2
   3: t1+1
   2: t1+1
   1: t1+0
   0: null+1
 
 One ancestor tag: more recent wins:
 
   $ hg tag -r 2 -m t2 -d '7 0' t2
   $ hg log --template '{rev}: {latesttag}+{latesttagdistance}\n'
   7: t2+3
   6: t2+2
   5: t2+1
   4: t1+2
   3: t1+1
   2: t2+0
   1: t1+0
   0: null+1
 
 Two branch tags: more recent wins:
 
   $ hg tag -r 3 -m t3 -d '8 0' t3
   $ hg log --template '{rev}: {latesttag}+{latesttagdistance}\n'
   8: t3+5
   7: t3+4
   6: t3+3
   5: t3+2
   4: t3+1
   3: t3+0
   2: t2+0
   1: t1+0
   0: null+1
 
 Merged tag overrides:
 
   $ hg tag -r 5 -m t5 -d '9 0' t5
   $ hg tag -r 3 -m at3 -d '10 0' at3
   $ hg log --template '{rev}: {latesttag}+{latesttagdistance}\n'
   10: t5+5
   9: t5+4
   8: t5+3
   7: t5+2
   6: t5+1
   5: t5+0
   4: at3:t3+1
   3: at3:t3+0
   2: t2+0
   1: t1+0
   0: null+1
 
   $ cd ..
 
 
 Style path expansion: issue1948 - ui.style option doesn't work on OSX
 if it is a relative path
 
   $ mkdir -p home/styles
 
   $ cat > home/styles/teststyle <<EOF
   > changeset = 'test {rev}:{node|short}\n'
   > EOF
 
   $ HOME=`pwd`/home; export HOME
 
   $ cat > latesttag/.hg/hgrc <<EOF
   > [ui]
   > style = ~/styles/teststyle
   > EOF
 
   $ hg -R latesttag tip
   test 10:9b4a630e5f5f
 
 Test recursive showlist template (issue1989):
 
   $ cat > style1989 <<EOF
   > changeset = '{file_mods}{manifest}{extras}'
   > file_mod  = 'M|{author|person}\n'
   > manifest = '{rev},{author}\n'
   > extra = '{key}: {author}\n'
   > EOF
 
   $ hg -R latesttag log -r tip --style=style1989
   M|test
   10,test
   branch: test
 
 Test new-style inline templating:
 
   $ hg log -R latesttag -r tip --template 'modified files: {file_mods % " {file}\n"}\n'
   modified files:  .hgtags
   
 Test the sub function of templating for expansion:
 
   $ hg log -R latesttag -r 10 --template '{sub("[0-9]", "x", "{rev}")}\n'
   xx
 
   $ hg log -R latesttag -r 10 -T '{sub("[", "x", rev)}\n'
   hg: parse error: sub got an invalid pattern: [
   [255]
   $ hg log -R latesttag -r 10 -T '{sub("[0-9]", r"\1", rev)}\n'
   hg: parse error: sub got an invalid replacement: \1
   [255]
 
 Test the strip function with chars specified:
 
   $ hg log -R latesttag --template '{desc}\n'
   at3
   t5
   t3
   t2
   t1
   merge
   h2e
   h2d
   h1c
   b
   a
 
   $ hg log -R latesttag --template '{strip(desc, "te")}\n'
   at3
   5
   3
   2
   1
   merg
   h2
   h2d
   h1c
   b
   a
 
 Test date format:
 
   $ hg log -R latesttag --template 'date: {date(date, "%y %m %d %S %z")}\n'
   date: 70 01 01 10 +0000
   date: 70 01 01 09 +0000
   date: 70 01 01 08 +0000
   date: 70 01 01 07 +0000
   date: 70 01 01 06 +0000
   date: 70 01 01 05 +0100
   date: 70 01 01 04 +0000
   date: 70 01 01 03 +0000
   date: 70 01 01 02 +0000
   date: 70 01 01 01 +0000
   date: 70 01 01 00 +0000
 
 Test invalid date:
 
   $ hg log -R latesttag -T '{date(rev)}\n'
   hg: parse error: date expects a date information
   [255]
 
 Test integer literal:
 
   $ hg log -Ra -r0 -T '{(0)}\n'
   0
   $ hg log -Ra -r0 -T '{(123)}\n'
   123
   $ hg log -Ra -r0 -T '{(-4)}\n'
   -4
   $ hg log -Ra -r0 -T '{(-)}\n'
   hg: parse error at 2: integer literal without digits
   [255]
   $ hg log -Ra -r0 -T '{(-a)}\n'
   hg: parse error at 2: integer literal without digits
   [255]
 
 top-level integer literal is interpreted as symbol (i.e. variable name):
 
   $ hg log -Ra -r0 -T '{1}\n'
   
   $ hg log -Ra -r0 -T '{if("t", "{1}")}\n'
   
   $ hg log -Ra -r0 -T '{1|stringify}\n'
   
 
 unless explicit symbol is expected:
 
   $ hg log -Ra -r0 -T '{desc|1}\n'
   hg: parse error: expected a symbol, got 'integer'
   [255]
   $ hg log -Ra -r0 -T '{1()}\n'
   hg: parse error: expected a symbol, got 'integer'
   [255]
 
 Test string literal:
 
   $ hg log -Ra -r0 -T '{"string with no template fragment"}\n'
   string with no template fragment
   $ hg log -Ra -r0 -T '{"template: {rev}"}\n'
   template: 0
   $ hg log -Ra -r0 -T '{r"rawstring: {rev}"}\n'
   rawstring: {rev}
 
 because map operation requires template, raw string can't be used
 
   $ hg log -Ra -r0 -T '{files % r"rawstring"}\n'
   hg: parse error: expected template specifier
   [255]
 
 Test string escaping:
 
   $ hg log -R latesttag -r 0 --template '>\n<>\\n<{if(rev, "[>\n<>\\n<]")}>\n<>\\n<\n'
   >
   <>\n<[>
   <>\n<]>
   <>\n<
 
   $ hg log -R latesttag -r 0 \
   > --config ui.logtemplate='>\n<>\\n<{if(rev, "[>\n<>\\n<]")}>\n<>\\n<\n'
   >
   <>\n<[>
   <>\n<]>
   <>\n<
 
   $ hg log -R latesttag -r 0 -T esc \
   > --config templates.esc='>\n<>\\n<{if(rev, "[>\n<>\\n<]")}>\n<>\\n<\n'
   >
   <>\n<[>
   <>\n<]>
   <>\n<
 
   $ cat <<'EOF' > esctmpl
   > changeset = '>\n<>\\n<{if(rev, "[>\n<>\\n<]")}>\n<>\\n<\n'
   > EOF
   $ hg log -R latesttag -r 0 --style ./esctmpl
   >
   <>\n<[>
   <>\n<]>
   <>\n<
 
 Test string escaping of quotes:
 
   $ hg log -Ra -r0 -T '{"\""}\n'
   "
   $ hg log -Ra -r0 -T '{"\\\""}\n'
   \"
   $ hg log -Ra -r0 -T '{r"\""}\n'
   \"
   $ hg log -Ra -r0 -T '{r"\\\""}\n'
   \\\"
 
 
   $ hg log -Ra -r0 -T '{"\""}\n'
   "
   $ hg log -Ra -r0 -T '{"\\\""}\n'
   \"
   $ hg log -Ra -r0 -T '{r"\""}\n'
   \"
   $ hg log -Ra -r0 -T '{r"\\\""}\n'
   \\\"
 
 Test exception in quoted template. single backslash before quotation mark is
 stripped before parsing:
 
   $ cat <<'EOF' > escquotetmpl
   > changeset = "\" \\" \\\" \\\\" {files % \"{file}\"}\n"
   > EOF
   $ cd latesttag
   $ hg log -r 2 --style ../escquotetmpl
   " \" \" \\" head1
 
   $ hg log -r 2 -T esc --config templates.esc='"{\"valid\"}\n"'
   valid
   $ hg log -r 2 -T esc --config templates.esc="'"'{\'"'"'valid\'"'"'}\n'"'"
   valid
 
 Test compatibility with 2.9.2-3.4 of escaped quoted strings in nested
 _evalifliteral() templates (issue4733):
 
   $ hg log -r 2 -T '{if(rev, "\"{rev}")}\n'
   "2
   $ hg log -r 2 -T '{if(rev, "{if(rev, \"\\\"{rev}\")}")}\n'
   "2
   $ hg log -r 2 -T '{if(rev, "{if(rev, \"{if(rev, \\\"\\\\\\\"{rev}\\\")}\")}")}\n'
   "2
 
   $ hg log -r 2 -T '{if(rev, "\\\"")}\n'
   \"
   $ hg log -r 2 -T '{if(rev, "{if(rev, \"\\\\\\\"\")}")}\n'
   \"
   $ hg log -r 2 -T '{if(rev, "{if(rev, \"{if(rev, \\\"\\\\\\\\\\\\\\\"\\\")}\")}")}\n'
   \"
 
   $ hg log -r 2 -T '{if(rev, r"\\\"")}\n'
   \\\"
   $ hg log -r 2 -T '{if(rev, "{if(rev, r\"\\\\\\\"\")}")}\n'
   \\\"
   $ hg log -r 2 -T '{if(rev, "{if(rev, \"{if(rev, r\\\"\\\\\\\\\\\\\\\"\\\")}\")}")}\n'
   \\\"
 
 escaped single quotes and errors:
 
   $ hg log -r 2 -T "{if(rev, '{if(rev, \'foo\')}')}"'\n'
   foo
   $ hg log -r 2 -T "{if(rev, '{if(rev, r\'foo\')}')}"'\n'
   foo
   $ hg log -r 2 -T '{if(rev, "{if(rev, \")}")}\n'
   hg: parse error at 21: unterminated string
   [255]
   $ hg log -r 2 -T '{if(rev, \"\\"")}\n'
   hg: parse error: trailing \ in string
   [255]
   $ hg log -r 2 -T '{if(rev, r\"\\"")}\n'
   hg: parse error: trailing \ in string
   [255]
 
   $ cd ..
 
 Test leading backslashes:
 
   $ cd latesttag
   $ hg log -r 2 -T '\{rev} {files % "\{file}"}\n'
   {rev} {file}
   $ hg log -r 2 -T '\\{rev} {files % "\\{file}"}\n'
   \2 \head1
   $ hg log -r 2 -T '\\\{rev} {files % "\\\{file}"}\n'
   \{rev} \{file}
   $ cd ..
 
 Test leading backslashes in "if" expression (issue4714):
 
   $ cd latesttag
   $ hg log -r 2 -T '{if("1", "\{rev}")} {if("1", r"\{rev}")}\n'
   {rev} \{rev}
   $ hg log -r 2 -T '{if("1", "\\{rev}")} {if("1", r"\\{rev}")}\n'
   \2 \\{rev}
   $ hg log -r 2 -T '{if("1", "\\\{rev}")} {if("1", r"\\\{rev}")}\n'
   \{rev} \\\{rev}
   $ cd ..
 
 "string-escape"-ed "\x5c\x786e" becomes r"\x6e" (once) or r"n" (twice)
 
   $ hg log -R a -r 0 --template '{if("1", "\x5c\x786e", "NG")}\n'
   \x6e
   $ hg log -R a -r 0 --template '{if("1", r"\x5c\x786e", "NG")}\n'
   \x5c\x786e
   $ hg log -R a -r 0 --template '{if("", "NG", "\x5c\x786e")}\n'
   \x6e
   $ hg log -R a -r 0 --template '{if("", "NG", r"\x5c\x786e")}\n'
   \x5c\x786e
 
   $ hg log -R a -r 2 --template '{ifeq("no perso\x6e", desc, "\x5c\x786e", "NG")}\n'
   \x6e
   $ hg log -R a -r 2 --template '{ifeq(r"no perso\x6e", desc, "NG", r"\x5c\x786e")}\n'
   \x5c\x786e
   $ hg log -R a -r 2 --template '{ifeq(desc, "no perso\x6e", "\x5c\x786e", "NG")}\n'
   \x6e
   $ hg log -R a -r 2 --template '{ifeq(desc, r"no perso\x6e", "NG", r"\x5c\x786e")}\n'
   \x5c\x786e
 
   $ hg log -R a -r 8 --template '{join(files, "\n")}\n'
   fourth
   second
   third
   $ hg log -R a -r 8 --template '{join(files, r"\n")}\n'
   fourth\nsecond\nthird
 
   $ hg log -R a -r 2 --template '{rstdoc("1st\n\n2nd", "htm\x6c")}'
   <p>
   1st
   </p>
   <p>
   2nd
   </p>
   $ hg log -R a -r 2 --template '{rstdoc(r"1st\n\n2nd", "html")}'
   <p>
   1st\n\n2nd
   </p>
   $ hg log -R a -r 2 --template '{rstdoc("1st\n\n2nd", r"htm\x6c")}'
   1st
   
   2nd
 
   $ hg log -R a -r 2 --template '{strip(desc, "\x6e")}\n'
   o perso
   $ hg log -R a -r 2 --template '{strip(desc, r"\x6e")}\n'
   no person
   $ hg log -R a -r 2 --template '{strip("no perso\x6e", "\x6e")}\n'
   o perso
   $ hg log -R a -r 2 --template '{strip(r"no perso\x6e", r"\x6e")}\n'
   no perso
 
   $ hg log -R a -r 2 --template '{sub("\\x6e", "\x2d", desc)}\n'
   -o perso-
   $ hg log -R a -r 2 --template '{sub(r"\\x6e", "-", desc)}\n'
   no person
   $ hg log -R a -r 2 --template '{sub("n", r"\x2d", desc)}\n'
   \x2do perso\x2d
   $ hg log -R a -r 2 --template '{sub("n", "\x2d", "no perso\x6e")}\n'
   -o perso-
   $ hg log -R a -r 2 --template '{sub("n", r"\x2d", r"no perso\x6e")}\n'
   \x2do perso\x6e
 
   $ hg log -R a -r 8 --template '{files % "{file}\n"}'
   fourth
   second
   third
 
 Test string escaping in nested expression:
 
   $ hg log -R a -r 8 --template '{ifeq(r"\x6e", if("1", "\x5c\x786e"), join(files, "\x5c\x786e"))}\n'
   fourth\x6esecond\x6ethird
   $ hg log -R a -r 8 --template '{ifeq(if("1", r"\x6e"), "\x5c\x786e", join(files, "\x5c\x786e"))}\n'
   fourth\x6esecond\x6ethird
 
   $ hg log -R a -r 8 --template '{join(files, ifeq(branch, "default", "\x5c\x786e"))}\n'
   fourth\x6esecond\x6ethird
   $ hg log -R a -r 8 --template '{join(files, ifeq(branch, "default", r"\x5c\x786e"))}\n'
   fourth\x5c\x786esecond\x5c\x786ethird
 
   $ hg log -R a -r 3:4 --template '{rev}:{sub(if("1", "\x6e"), ifeq(branch, "foo", r"\x5c\x786e", "\x5c\x786e"), desc)}\n'
   3:\x6eo user, \x6eo domai\x6e
   4:\x5c\x786eew bra\x5c\x786ech
 
 Test quotes in nested expression are evaluated just like a $(command)
 substitution in POSIX shells:
 
   $ hg log -R a -r 8 -T '{"{"{rev}:{node|short}"}"}\n'
   8:95c24699272e
   $ hg log -R a -r 8 -T '{"{"\{{rev}} \"{node|short}\""}"}\n'
   {8} "95c24699272e"
 
 Test recursive evaluation:
 
   $ hg init r
   $ cd r
   $ echo a > a
   $ hg ci -Am '{rev}'
   adding a
   $ hg log -r 0 --template '{if(rev, desc)}\n'
   {rev}
   $ hg log -r 0 --template '{if(rev, "{author} {rev}")}\n'
   test 0
 
   $ hg branch -q 'text.{rev}'
   $ echo aa >> aa
   $ hg ci -u '{node|short}' -m 'desc to be wrapped desc to be wrapped'
 
   $ hg log -l1 --template '{fill(desc, "20", author, branch)}'
   {node|short}desc to
   text.{rev}be wrapped
   text.{rev}desc to be
   text.{rev}wrapped (no-eol)
   $ hg log -l1 --template '{fill(desc, "20", "{node|short}:", "text.{rev}:")}'
   bcc7ff960b8e:desc to
   text.1:be wrapped
   text.1:desc to be
   text.1:wrapped (no-eol)
 
   $ hg log -l 1 --template '{sub(r"[0-9]", "-", author)}'
   {node|short} (no-eol)
   $ hg log -l 1 --template '{sub(r"[0-9]", "-", "{node|short}")}'
   bcc-ff---b-e (no-eol)
 
   $ cat >> .hg/hgrc <<EOF
   > [extensions]
   > color=
   > [color]
   > mode=ansi
   > text.{rev} = red
   > text.1 = green
   > EOF
   $ hg log --color=always -l 1 --template '{label(branch, "text\n")}'
   \x1b[0;31mtext\x1b[0m (esc)
   $ hg log --color=always -l 1 --template '{label("text.{rev}", "text\n")}'
   \x1b[0;32mtext\x1b[0m (esc)
 
 Test branches inside if statement:
 
   $ hg log -r 0 --template '{if(branches, "yes", "no")}\n'
   no
 
 Test get function:
 
   $ hg log -r 0 --template '{get(extras, "branch")}\n'
   default
   $ hg log -r 0 --template '{get(files, "should_fail")}\n'
   hg: parse error: get() expects a dict as first argument
   [255]
 
 Test localdate(date, tz) function:
 
   $ TZ=JST-09 hg log -r0 -T '{date|localdate|isodate}\n'
   1970-01-01 09:00 +0900
   $ TZ=JST-09 hg log -r0 -T '{localdate(date, "UTC")|isodate}\n'
   1970-01-01 00:00 +0000
   $ TZ=JST-09 hg log -r0 -T '{localdate(date, "+0200")|isodate}\n'
   1970-01-01 02:00 +0200
   $ TZ=JST-09 hg log -r0 -T '{localdate(date, "0")|isodate}\n'
   1970-01-01 00:00 +0000
   $ TZ=JST-09 hg log -r0 -T '{localdate(date, 0)|isodate}\n'
   1970-01-01 00:00 +0000
   $ hg log -r0 -T '{localdate(date, "invalid")|isodate}\n'
   hg: parse error: localdate expects a timezone
   [255]
   $ hg log -r0 -T '{localdate(date, date)|isodate}\n'
   hg: parse error: localdate expects a timezone
   [255]
 
 Test shortest(node) function:
 
   $ echo b > b
   $ hg ci -qAm b
   $ hg log --template '{shortest(node)}\n'
   e777
   bcc7
   f776
   $ hg log --template '{shortest(node, 10)}\n'
   e777603221
   bcc7ff960b
   f7769ec2ab
   $ hg log --template '{node|shortest}\n' -l1
   e777
 
 Test pad function
 
   $ hg log --template '{pad(rev, 20)} {author|user}\n'
   2                    test
   1                    {node|short}
   0                    test
 
   $ hg log --template '{pad(rev, 20, " ", True)} {author|user}\n'
                      2 test
                      1 {node|short}
                      0 test
 
   $ hg log --template '{pad(rev, 20, "-", False)} {author|user}\n'
   2------------------- test
   1------------------- {node|short}
   0------------------- test
 
 Test template string in pad function
 
   $ hg log -r 0 -T '{pad("\{{rev}}", 10)} {author|user}\n'
   {0}        test
 
   $ hg log -r 0 -T '{pad(r"\{rev}", 10)} {author|user}\n'
   \{rev}     test
 
 Test ifcontains function
 
   $ hg log --template '{rev} {ifcontains(rev, "2 two 0", "is in the string", "is not")}\n'
   2 is in the string
   1 is not
   0 is in the string
 
   $ hg log --template '{rev} {ifcontains("a", file_adds, "added a", "did not add a")}\n'
   2 did not add a
   1 did not add a
   0 added a
 
 Test revset function
 
   $ hg log --template '{rev} {ifcontains(rev, revset("."), "current rev", "not current rev")}\n'
   2 current rev
   1 not current rev
   0 not current rev
 
   $ hg log --template '{rev} {ifcontains(rev, revset(". + .^"), "match rev", "not match rev")}\n'
   2 match rev
   1 match rev
   0 not match rev
 
   $ hg log --template '{rev} Parents: {revset("parents(%s)", rev)}\n'
   2 Parents: 1
   1 Parents: 0
   0 Parents: 
 
   $ cat >> .hg/hgrc <<EOF
   > [revsetalias]
   > myparents(\$1) = parents(\$1)
   > EOF
   $ hg log --template '{rev} Parents: {revset("myparents(%s)", rev)}\n'
   2 Parents: 1
   1 Parents: 0
   0 Parents: 
 
   $ hg log --template 'Rev: {rev}\n{revset("::%s", rev) % "Ancestor: {revision}\n"}\n'
   Rev: 2
   Ancestor: 0
   Ancestor: 1
   Ancestor: 2
   
   Rev: 1
   Ancestor: 0
   Ancestor: 1
   
   Rev: 0
   Ancestor: 0
   
   $ hg log --template '{revset("TIP"|lower)}\n' -l1
   2
 
 Test active bookmark templating
 
   $ hg book foo
   $ hg book bar
   $ hg log --template "{rev} {bookmarks % '{bookmark}{ifeq(bookmark, active, \"*\")} '}\n"
   2 bar* foo 
   1 
   0 
   $ hg log --template "{rev} {activebookmark}\n"
   2 bar
   1 
   0 
   $ hg bookmarks --inactive bar
   $ hg log --template "{rev} {activebookmark}\n"
   2 
   1 
   0 
   $ hg book -r1 baz
   $ hg log --template "{rev} {join(bookmarks, ' ')}\n"
   2 bar foo
   1 baz
   0 
   $ hg log --template "{rev} {ifcontains('foo', bookmarks, 't', 'f')}\n"
   2 t
   1 f
   0 f
 
 Test stringify on sub expressions
 
   $ cd ..
   $ hg log -R a -r 8 --template '{join(files, if("1", if("1", ", ")))}\n'
   fourth, second, third
   $ hg log -R a -r 8 --template '{strip(if("1", if("1", "-abc-")), if("1", if("1", "-")))}\n'
   abc
 
 Test splitlines
 
   $ hg log -Gv -R a --template "{splitlines(desc) % 'foo {line}\n'}"
   @  foo Modify, add, remove, rename
   |
   o  foo future
   |
   o  foo third
   |
   o  foo second
   
   o    foo merge
   |\
   | o  foo new head
   | |
   o |  foo new branch
   |/
   o  foo no user, no domain
   |
   o  foo no person
   |
   o  foo other 1
   |  foo other 2
   |  foo
   |  foo other 3
   o  foo line 1
      foo line 2
 
 Test startswith
   $ hg log -Gv -R a --template "{startswith(desc)}"
   hg: parse error: startswith expects two arguments
   [255]
 
   $ hg log -Gv -R a --template "{startswith('line', desc)}"
   @
   |
   o
   |
   o
   |
   o
   
   o
   |\
   | o
   | |
   o |
   |/
   o
   |
   o
   |
   o
   |
   o  line 1
      line 2
 
 Test bad template with better error message
 
   $ hg log -Gv -R a --template '{desc|user()}'
   hg: parse error: expected a symbol, got 'func'
   [255]
 
 Test word function (including index out of bounds graceful failure)
 
   $ hg log -Gv -R a --template "{word('1', desc)}"
   @  add,
   |
   o
   |
   o
   |
   o
   
   o
   |\
   | o  head
   | |
   o |  branch
   |/
   o  user,
   |
   o  person
   |
   o  1
   |
   o  1
   
 
 Test word third parameter used as splitter
 
   $ hg log -Gv -R a --template "{word('0', desc, 'o')}"
   @  M
   |
   o  future
   |
   o  third
   |
   o  sec
   
   o    merge
   |\
   | o  new head
   | |
   o |  new branch
   |/
   o  n
   |
   o  n
   |
   o
   |
   o  line 1
      line 2
 
 Test word error messages for not enough and too many arguments
 
   $ hg log -Gv -R a --template "{word('0')}"
   hg: parse error: word expects two or three arguments, got 1
   [255]
 
   $ hg log -Gv -R a --template "{word('0', desc, 'o', 'h', 'b', 'o', 'y')}"
   hg: parse error: word expects two or three arguments, got 7
   [255]
 
 Test word for integer literal
 
   $ hg log -R a --template "{word(2, desc)}\n" -r0
   line
 
 Test word for invalid numbers
 
   $ hg log -Gv -R a --template "{word('a', desc)}"
   hg: parse error: word expects an integer index
   [255]
 
 Test indent and not adding to empty lines
 
   $ hg log -T "-----\n{indent(desc, '>> ', ' > ')}\n" -r 0:1 -R a
   -----
    > line 1
   >> line 2
   -----
    > other 1
   >> other 2
   
   >> other 3
 
 Test with non-strings like dates
 
   $ hg log -T "{indent(date, '   ')}\n" -r 2:3 -R a
      1200000.00
      1300000.00
 
 Test broken string escapes:
 
   $ hg log -T "bogus\\" -R a
   hg: parse error: trailing \ in string
   [255]
   $ hg log -T "\\xy" -R a
   hg: parse error: invalid \x escape
   [255]