python, hg: tow outside the environment.

they've served us well, and can ride off into the sunset.

1 files changed, 0 insertions, 1254 deletions

diff --git a/sys/lib/python/mercurial/cmdutil.py b/sys/lib/python/mercurial/cmdutil.py
deleted file mode 100644
index 1c58d6bdc..000000000
--- a/sys/lib/python/mercurial/cmdutil.py
+++ /dev/null
@@ -1,1254 +0,0 @@
-# cmdutil.py - help for command processing in mercurial
-#
-# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
-#
-# This software may be used and distributed according to the terms of the
-# GNU General Public License version 2, incorporated herein by reference.
-
-from node import hex, nullid, nullrev, short
-from i18n import _
-import os, sys, errno, re, glob
-import mdiff, bdiff, util, templater, patch, error, encoding
-import match as _match
-
-revrangesep = ':'
-
-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 = {}
-    for e in table.keys():
-        aliases = e.lstrip("^").split("|")
-        found = None
-        if cmd in aliases:
-            found = cmd
-        elif not strict:
-            for a in aliases:
-                if a.startswith(cmd):
-                    found = a
-                    break
-        if found is not None:
-            if aliases[0].startswith("debug") or found.startswith("debug"):
-                debugchoice[found] = (aliases, table[e])
-            else:
-                choice[found] = (aliases, table[e])
-
-    if not choice and debugchoice:
-        choice = debugchoice
-
-    return choice
-
-def findcmd(cmd, table, strict=True):
-    """Return (aliases, command table entry) for command string."""
-    choice = findpossible(cmd, table, strict)
-
-    if cmd in choice:
-        return choice[cmd]
-
-    if len(choice) > 1:
-        clist = choice.keys()
-        clist.sort()
-        raise error.AmbiguousCommand(cmd, clist)
-
-    if choice:
-        return choice.values()[0]
-
-    raise error.UnknownCommand(cmd)
-
-def bail_if_changed(repo):
-    if repo.dirstate.parents()[1] != nullid:
-        raise util.Abort(_('outstanding uncommitted merge'))
-    modified, added, removed, deleted = repo.status()[:4]
-    if modified or added or removed or deleted:
-        raise util.Abort(_("outstanding uncommitted changes"))
-
-def logmessage(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 = sys.stdin.read()
-            else:
-                message = open(logfile).read()
-        except IOError, inst:
-            raise util.Abort(_("can't read commit message '%s': %s") %
-                             (logfile, inst.strerror))
-    return message
-
-def loglimit(opts):
-    """get the log limit according to option -l/--limit"""
-    limit = opts.get('limit')
-    if limit:
-        try:
-            limit = int(limit)
-        except ValueError:
-            raise util.Abort(_('limit must be a positive integer'))
-        if limit <= 0: raise util.Abort(_('limit must be positive'))
-    else:
-        limit = sys.maxint
-    return limit
-
-def remoteui(src, opts):
-    'build a remote ui from ui or repo and opts'
-    if hasattr(src, 'baseui'): # looks like a repository
-        dst = src.baseui.copy() # drop repo-specific config
-        src = src.ui # copy target options from repo
-    else: # assume it's a global ui object
-        dst = src.copy() # keep all global options
-
-    # copy ssh-specific options
-    for o in 'ssh', 'remotecmd':
-        v = opts.get(o) or src.config('ui', o)
-        if v:
-            dst.setconfig("ui", o, v)
-    # copy bundle-specific options
-    r = src.config('bundle', 'mainreporoot')
-    if r:
-        dst.setconfig('bundle', 'mainreporoot', r)
-
-    return dst
-
-def revpair(repo, revs):
-    '''return pair of nodes, given list of revisions. second item can
-    be None, meaning use working dir.'''
-
-    def revfix(repo, val, defval):
-        if not val and val != 0 and defval is not None:
-            val = defval
-        return repo.lookup(val)
-
-    if not revs:
-        return repo.dirstate.parents()[0], None
-    end = None
-    if len(revs) == 1:
-        if revrangesep in revs[0]:
-            start, end = revs[0].split(revrangesep, 1)
-            start = revfix(repo, start, 0)
-            end = revfix(repo, end, len(repo) - 1)
-        else:
-            start = revfix(repo, revs[0], None)
-    elif len(revs) == 2:
-        if revrangesep in revs[0] or revrangesep in revs[1]:
-            raise util.Abort(_('too many revisions specified'))
-        start = revfix(repo, revs[0], None)
-        end = revfix(repo, revs[1], None)
-    else:
-        raise util.Abort(_('too many revisions specified'))
-    return start, end
-
-def revrange(repo, revs):
-    """Yield revision as strings from a list of revision specifications."""
-
-    def revfix(repo, val, defval):
-        if not val and val != 0 and defval is not None:
-            return defval
-        return repo.changelog.rev(repo.lookup(val))
-
-    seen, l = set(), []
-    for spec in revs:
-        if revrangesep in spec:
-            start, end = spec.split(revrangesep, 1)
-            start = revfix(repo, start, 0)
-            end = revfix(repo, end, len(repo) - 1)
-            step = start > end and -1 or 1
-            for rev in xrange(start, end+step, step):
-                if rev in seen:
-                    continue
-                seen.add(rev)
-                l.append(rev)
-        else:
-            rev = revfix(repo, spec, None)
-            if rev in seen:
-                continue
-            seen.add(rev)
-            l.append(rev)
-
-    return l
-
-def make_filename(repo, pat, node,
-                  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),
-        }
-    expander = {
-        '%': lambda: '%',
-        'b': lambda: os.path.basename(repo.root),
-        }
-
-    try:
-        if node:
-            expander.update(node_expander)
-        if node:
-            expander['r'] = (lambda:
-                    str(repo.changelog.rev(node)).zfill(revwidth or 0))
-        if total is not None:
-            expander['N'] = lambda: str(total)
-        if seqno is not None:
-            expander['n'] = lambda: str(seqno)
-        if total is not None and seqno is not None:
-            expander['n'] = lambda: str(seqno).zfill(len(str(total)))
-        if pathname is not None:
-            expander['s'] = lambda: os.path.basename(pathname)
-            expander['d'] = lambda: os.path.dirname(pathname) or '.'
-            expander['p'] = lambda: pathname
-
-        newname = []
-        patlen = len(pat)
-        i = 0
-        while i < patlen:
-            c = pat[i]
-            if c == '%':
-                i += 1
-                c = pat[i]
-                c = expander[c]()
-            newname.append(c)
-            i += 1
-        return ''.join(newname)
-    except KeyError, inst:
-        raise util.Abort(_("invalid format spec '%%%s' in output filename") %
-                         inst.args[0])
-
-def make_file(repo, pat, node=None,
-              total=None, seqno=None, revwidth=None, mode='wb', pathname=None):
-
-    writable = 'w' in mode or 'a' in mode
-
-    if not pat or pat == '-':
-        return writable and sys.stdout or sys.stdin
-    if hasattr(pat, 'write') and writable:
-        return pat
-    if hasattr(pat, 'read') and 'r' in mode:
-        return pat
-    return open(make_filename(repo, pat, node, total, seqno, revwidth,
-                              pathname),
-                mode)
-
-def expandpats(pats):
-    if not util.expandglobs:
-        return list(pats)
-    ret = []
-    for p in pats:
-        kind, name = _match._patsplit(p, None)
-        if kind is None:
-            try:
-                globbed = glob.glob(name)
-            except re.error:
-                globbed = [name]
-            if globbed:
-                ret.extend(globbed)
-                continue
-        ret.append(p)
-    return ret
-
-def match(repo, pats=[], opts={}, globbed=False, default='relpath'):
-    if not globbed and default == 'relpath':
-        pats = expandpats(pats or [])
-    m = _match.match(repo.root, repo.getcwd(), pats,
-                    opts.get('include'), opts.get('exclude'), default)
-    def badfn(f, msg):
-        repo.ui.warn("%s: %s\n" % (m.rel(f), msg))
-    m.bad = badfn
-    return m
-
-def matchall(repo):
-    return _match.always(repo.root, repo.getcwd())
-
-def matchfiles(repo, files):
-    return _match.exact(repo.root, repo.getcwd(), files)
-
-def findrenames(repo, added, removed, threshold):
-    '''find renamed files -- yields (before, after, score) tuples'''
-    ctx = repo['.']
-    for a in added:
-        aa = repo.wread(a)
-        bestname, bestscore = None, threshold
-        for r in removed:
-            if r not in ctx:
-                continue
-            rr = ctx.filectx(r).data()
-
-            # bdiff.blocks() returns blocks of matching lines
-            # count the number of bytes in each
-            equal = 0
-            alines = mdiff.splitnewlines(aa)
-            matches = bdiff.blocks(aa, rr)
-            for x1,x2,y1,y2 in matches:
-                for line in alines[x1:x2]:
-                    equal += len(line)
-
-            lengths = len(aa) + len(rr)
-            if lengths:
-                myscore = equal*2.0 / lengths
-                if myscore >= bestscore:
-                    bestname, bestscore = r, myscore
-        if bestname:
-            yield bestname, a, bestscore
-
-def addremove(repo, pats=[], opts={}, dry_run=None, similarity=None):
-    if dry_run is None:
-        dry_run = opts.get('dry_run')
-    if similarity is None:
-        similarity = float(opts.get('similarity') or 0)
-    # we'd use status here, except handling of symlinks and ignore is tricky
-    added, unknown, deleted, removed = [], [], [], []
-    audit_path = util.path_auditor(repo.root)
-    m = match(repo, pats, opts)
-    for abs in repo.walk(m):
-        target = repo.wjoin(abs)
-        good = True
-        try:
-            audit_path(abs)
-        except:
-            good = False
-        rel = m.rel(abs)
-        exact = m.exact(abs)
-        if good and abs not in repo.dirstate:
-            unknown.append(abs)
-            if repo.ui.verbose or not exact:
-                repo.ui.status(_('adding %s\n') % ((pats and rel) or abs))
-        elif repo.dirstate[abs] != 'r' and (not good or not util.lexists(target)
-            or (os.path.isdir(target) and not os.path.islink(target))):
-            deleted.append(abs)
-            if repo.ui.verbose or not exact:
-                repo.ui.status(_('removing %s\n') % ((pats and rel) or abs))
-        # for finding renames
-        elif repo.dirstate[abs] == 'r':
-            removed.append(abs)
-        elif repo.dirstate[abs] == 'a':
-            added.append(abs)
-    if not dry_run:
-        repo.remove(deleted)
-        repo.add(unknown)
-    if similarity > 0:
-        for old, new, score in findrenames(repo, added + unknown,
-                                           removed + deleted, similarity):
-            if repo.ui.verbose or not m.exact(old) or not m.exact(new):
-                repo.ui.status(_('recording removal of %s as rename to %s '
-                                 '(%d%% similar)\n') %
-                               (m.rel(old), m.rel(new), score * 100))
-            if not dry_run:
-                repo.copy(old, new)
-
-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")
-
-    def walkpat(pat):
-        srcs = []
-        m = match(repo, [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 '?r':
-                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 = util.canonpath(repo.root, cwd, otarget)
-        reltarget = repo.pathto(abstarget, cwd)
-        target = repo.wjoin(abstarget)
-        src = repo.wjoin(abssrc)
-        state = repo.dirstate[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.exists(target)
-        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:
-                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)
-                util.copyfile(src, target)
-            except IOError, inst:
-                if inst.errno == errno.ENOENT:
-                    ui.warn(_('%s: deleted in working copy\n') % relsrc)
-                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
-        origsrc = repo.dirstate.copied(abssrc) or abssrc
-        if abstarget == origsrc: # copying back a copy?
-            if state not in 'mn' and not dryrun:
-                repo.dirstate.normallookup(abstarget)
-        else:
-            if repo.dirstate[origsrc] == 'a' and origsrc == abssrc:
-                if not ui.quiet:
-                    ui.warn(_("%s has not been committed yet, so no copy "
-                              "data will be stored for %s.\n")
-                            % (repo.pathto(origsrc, cwd), reltarget))
-                if repo.dirstate[abstarget] in '?r' and not dryrun:
-                    repo.add([abstarget])
-            elif not dryrun:
-                repo.copy(origsrc, abstarget)
-
-        if rename and not dryrun:
-            repo.remove([abssrc], not after)
-
-    # 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 = util.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 _match.patkind(pat):
-            # a mercurial pattern
-            res = lambda p: os.path.join(dest,
-                                         os.path.basename(util.localpath(p)))
-        else:
-            abspfx = util.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.exists(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 = 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 _match.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
-
-def service(opts, parentfn=None, initfn=None, runfn=None, logfile=None):
-    '''Run a command as a service.'''
-
-    if opts['daemon'] and not opts['daemon_pipefds']:
-        rfd, wfd = os.pipe()
-        args = sys.argv[:]
-        args.append('--daemon-pipefds=%d,%d' % (rfd, wfd))
-        # Don't pass --cwd to the child process, because we've already
-        # changed directory.
-        for i in xrange(1,len(args)):
-            if args[i].startswith('--cwd='):
-                del args[i]
-                break
-            elif args[i].startswith('--cwd'):
-                del args[i:i+2]
-                break
-        pid = os.spawnvp(os.P_NOWAIT | getattr(os, 'P_DETACH', 0),
-                         args[0], args)
-        os.close(wfd)
-        os.read(rfd, 1)
-        if parentfn:
-            return parentfn(pid)
-        else:
-            os._exit(0)
-
-    if initfn:
-        initfn()
-
-    if opts['pid_file']:
-        fp = open(opts['pid_file'], 'w')
-        fp.write(str(os.getpid()) + '\n')
-        fp.close()
-
-    if opts['daemon_pipefds']:
-        rfd, wfd = [int(x) for x in opts['daemon_pipefds'].split(',')]
-        os.close(rfd)
-        try:
-            os.setsid()
-        except AttributeError:
-            pass
-        os.write(wfd, 'y')
-        os.close(wfd)
-        sys.stdout.flush()
-        sys.stderr.flush()
-
-        nullfd = os.open(util.nulldev, 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()
-
-class changeset_printer(object):
-    '''show changeset information when templating not requested.'''
-
-    def __init__(self, ui, repo, patch, diffopts, buffered):
-        self.ui = ui
-        self.repo = repo
-        self.buffered = buffered
-        self.patch = patch
-        self.diffopts = diffopts
-        self.header = {}
-        self.hunk = {}
-        self.lastheader = None
-
-    def flush(self, rev):
-        if rev in self.header:
-            h = self.header[rev]
-            if h != self.lastheader:
-                self.lastheader = h
-                self.ui.write(h)
-            del self.header[rev]
-        if rev in self.hunk:
-            self.ui.write(self.hunk[rev])
-            del self.hunk[rev]
-            return 1
-        return 0
-
-    def show(self, ctx, copies=(), **props):
-        if self.buffered:
-            self.ui.pushbuffer()
-            self._show(ctx, copies, props)
-            self.hunk[ctx.rev()] = self.ui.popbuffer()
-        else:
-            self._show(ctx, copies, props)
-
-    def _show(self, ctx, copies, props):
-        '''show a single changeset or file revision'''
-        changenode = ctx.node()
-        rev = ctx.rev()
-
-        if self.ui.quiet:
-            self.ui.write("%d:%s\n" % (rev, short(changenode)))
-            return
-
-        log = self.repo.changelog
-        changes = log.read(changenode)
-        date = util.datestr(changes[2])
-        extra = changes[5]
-        branch = extra.get("branch")
-
-        hexfunc = self.ui.debugflag and hex or short
-
-        parents = [(p, hexfunc(log.node(p)))
-                   for p in self._meaningful_parentrevs(log, rev)]
-
-        self.ui.write(_("changeset:   %d:%s\n") % (rev, hexfunc(changenode)))
-
-        # don't show the default branch name
-        if branch != 'default':
-            branch = encoding.tolocal(branch)
-            self.ui.write(_("branch:      %s\n") % branch)
-        for tag in self.repo.nodetags(changenode):
-            self.ui.write(_("tag:         %s\n") % tag)
-        for parent in parents:
-            self.ui.write(_("parent:      %d:%s\n") % parent)
-
-        if self.ui.debugflag:
-            self.ui.write(_("manifest:    %d:%s\n") %
-                          (self.repo.manifest.rev(changes[0]), hex(changes[0])))
-        self.ui.write(_("user:        %s\n") % changes[1])
-        self.ui.write(_("date:        %s\n") % date)
-
-        if self.ui.debugflag:
-            files = self.repo.status(log.parents(changenode)[0], changenode)[:3]
-            for key, value in zip([_("files:"), _("files+:"), _("files-:")],
-                                  files):
-                if value:
-                    self.ui.write("%-12s %s\n" % (key, " ".join(value)))
-        elif changes[3] and self.ui.verbose:
-            self.ui.write(_("files:       %s\n") % " ".join(changes[3]))
-        if copies and self.ui.verbose:
-            copies = ['%s (%s)' % c for c in copies]
-            self.ui.write(_("copies:      %s\n") % ' '.join(copies))
-
-        if extra and self.ui.debugflag:
-            for key, value in sorted(extra.items()):
-                self.ui.write(_("extra:       %s=%s\n")
-                              % (key, value.encode('string_escape')))
-
-        description = changes[4].strip()
-        if description:
-            if self.ui.verbose:
-                self.ui.write(_("description:\n"))
-                self.ui.write(description)
-                self.ui.write("\n\n")
-            else:
-                self.ui.write(_("summary:     %s\n") %
-                              description.splitlines()[0])
-        self.ui.write("\n")
-
-        self.showpatch(changenode)
-
-    def showpatch(self, node):
-        if self.patch:
-            prev = self.repo.changelog.parents(node)[0]
-            chunks = patch.diff(self.repo, prev, node, match=self.patch,
-                                opts=patch.diffopts(self.ui, self.diffopts))
-            for chunk in chunks:
-                self.ui.write(chunk)
-            self.ui.write("\n")
-
-    def _meaningful_parentrevs(self, log, rev):
-        """Return list of meaningful (or all if debug) parentrevs for rev.
-
-        For merges (two non-nullrev revisions) both parents are meaningful.
-        Otherwise the first parent revision is considered meaningful if it
-        is not the preceding revision.
-        """
-        parents = log.parentrevs(rev)
-        if not self.ui.debugflag and parents[1] == nullrev:
-            if parents[0] >= rev - 1:
-                parents = []
-            else:
-                parents = [parents[0]]
-        return parents
-
-
-class changeset_templater(changeset_printer):
-    '''format changeset information.'''
-
-    def __init__(self, ui, repo, patch, diffopts, mapfile, buffered):
-        changeset_printer.__init__(self, ui, repo, patch, diffopts, buffered)
-        formatnode = ui.debugflag and (lambda x: x) or (lambda x: x[:12])
-        self.t = templater.templater(mapfile, {'formatnode': formatnode},
-                                     cache={
-                                         'parent': '{rev}:{node|formatnode} ',
-                                         'manifest': '{rev}:{node|formatnode}',
-                                         'filecopy': '{name} ({source})'})
-
-    def use_template(self, t):
-        '''set template string to use'''
-        self.t.cache['changeset'] = t
-
-    def _meaningful_parentrevs(self, ctx):
-        """Return list of meaningful (or all if debug) parentrevs for rev.
-        """
-        parents = ctx.parents()
-        if len(parents) > 1:
-            return parents
-        if self.ui.debugflag:
-            return [parents[0], self.repo['null']]
-        if parents[0].rev() >= ctx.rev() - 1:
-            return []
-        return parents
-
-    def _show(self, ctx, copies, props):
-        '''show a single changeset or file revision'''
-
-        def showlist(name, values, plural=None, **args):
-            '''expand set of values.
-            name is name of key in template map.
-            values is list of strings or dicts.
-            plural is plural of name, if not simply name + 's'.
-
-            expansion works like this, given name 'foo'.
-
-            if values is empty, expand 'no_foos'.
-
-            if 'foo' not in template map, return values as a string,
-            joined by space.
-
-            expand 'start_foos'.
-
-            for each value, expand 'foo'. if 'last_foo' in template
-            map, expand it instead of 'foo' for last key.
-
-            expand 'end_foos'.
-            '''
-            if plural: names = plural
-            else: names = name + 's'
-            if not values:
-                noname = 'no_' + names
-                if noname in self.t:
-                    yield self.t(noname, **args)
-                return
-            if name not in self.t:
-                if isinstance(values[0], str):
-                    yield ' '.join(values)
-                else:
-                    for v in values:
-                        yield dict(v, **args)
-                return
-            startname = 'start_' + names
-            if startname in self.t:
-                yield self.t(startname, **args)
-            vargs = args.copy()
-            def one(v, tag=name):
-                try:
-                    vargs.update(v)
-                except (AttributeError, ValueError):
-                    try:
-                        for a, b in v:
-                            vargs[a] = b
-                    except ValueError:
-                        vargs[name] = v
-                return self.t(tag, **vargs)
-            lastname = 'last_' + name
-            if lastname in self.t:
-                last = values.pop()
-            else:
-                last = None
-            for v in values:
-                yield one(v)
-            if last is not None:
-                yield one(last, tag=lastname)
-            endname = 'end_' + names
-            if endname in self.t:
-                yield self.t(endname, **args)
-
-        def showbranches(**args):
-            branch = ctx.branch()
-            if branch != 'default':
-                branch = encoding.tolocal(branch)
-                return showlist('branch', [branch], plural='branches', **args)
-
-        def showparents(**args):
-            parents = [[('rev', p.rev()), ('node', p.hex())]
-                       for p in self._meaningful_parentrevs(ctx)]
-            return showlist('parent', parents, **args)
-
-        def showtags(**args):
-            return showlist('tag', ctx.tags(), **args)
-
-        def showextras(**args):
-            for key, value in sorted(ctx.extra().items()):
-                args = args.copy()
-                args.update(dict(key=key, value=value))
-                yield self.t('extra', **args)
-
-        def showcopies(**args):
-            c = [{'name': x[0], 'source': x[1]} for x in copies]
-            return showlist('file_copy', c, plural='file_copies', **args)
-
-        files = []
-        def getfiles():
-            if not files:
-                files[:] = self.repo.status(ctx.parents()[0].node(),
-                                            ctx.node())[:3]
-            return files
-        def showfiles(**args):
-            return showlist('file', ctx.files(), **args)
-        def showmods(**args):
-            return showlist('file_mod', getfiles()[0], **args)
-        def showadds(**args):
-            return showlist('file_add', getfiles()[1], **args)
-        def showdels(**args):
-            return showlist('file_del', getfiles()[2], **args)
-        def showmanifest(**args):
-            args = args.copy()
-            args.update(dict(rev=self.repo.manifest.rev(ctx.changeset()[0]),
-                             node=hex(ctx.changeset()[0])))
-            return self.t('manifest', **args)
-
-        def showdiffstat(**args):
-            diff = patch.diff(self.repo, ctx.parents()[0].node(), ctx.node())
-            files, adds, removes = 0, 0, 0
-            for i in patch.diffstatdata(util.iterlines(diff)):
-                files += 1
-                adds += i[1]
-                removes += i[2]
-            return '%s: +%s/-%s' % (files, adds, removes)
-
-        defprops = {
-            'author': ctx.user(),
-            'branches': showbranches,
-            'date': ctx.date(),
-            'desc': ctx.description().strip(),
-            'file_adds': showadds,
-            'file_dels': showdels,
-            'file_mods': showmods,
-            'files': showfiles,
-            'file_copies': showcopies,
-            'manifest': showmanifest,
-            'node': ctx.hex(),
-            'parents': showparents,
-            'rev': ctx.rev(),
-            'tags': showtags,
-            'extras': showextras,
-            'diffstat': showdiffstat,
-            }
-        props = props.copy()
-        props.update(defprops)
-
-        # find correct templates for current mode
-
-        tmplmodes = [
-            (True, None),
-            (self.ui.verbose, 'verbose'),
-            (self.ui.quiet, 'quiet'),
-            (self.ui.debugflag, 'debug'),
-        ]
-
-        types = {'header': '', 'changeset': 'changeset'}
-        for mode, postfix  in tmplmodes:
-            for type in types:
-                cur = postfix and ('%s_%s' % (type, postfix)) or type
-                if mode and cur in self.t:
-                    types[type] = cur
-
-        try:
-
-            # write header
-            if types['header']:
-                h = templater.stringify(self.t(types['header'], **props))
-                if self.buffered:
-                    self.header[ctx.rev()] = h
-                else:
-                    self.ui.write(h)
-
-            # write changeset metadata, then patch if requested
-            key = types['changeset']
-            self.ui.write(templater.stringify(self.t(key, **props)))
-            self.showpatch(ctx.node())
-
-        except KeyError, inst:
-            msg = _("%s: no key named '%s'")
-            raise util.Abort(msg % (self.t.mapfile, inst.args[0]))
-        except SyntaxError, inst:
-            raise util.Abort(_('%s: %s') % (self.t.mapfile, inst.args[0]))
-
-def show_changeset(ui, repo, opts, buffered=False, matchfn=False):
-    """show one changeset using template or regular display.
-
-    Display format will be the first non-empty hit of:
-    1. option 'template'
-    2. option 'style'
-    3. [ui] setting 'logtemplate'
-    4. [ui] setting 'style'
-    If all of these values are either the unset or the empty string,
-    regular display via changeset_printer() is done.
-    """
-    # options
-    patch = False
-    if opts.get('patch'):
-        patch = matchfn or matchall(repo)
-
-    tmpl = opts.get('template')
-    style = None
-    if tmpl:
-        tmpl = templater.parsestring(tmpl, quoted=False)
-    else:
-        style = opts.get('style')
-
-    # ui settings
-    if not (tmpl or style):
-        tmpl = ui.config('ui', 'logtemplate')
-        if tmpl:
-            tmpl = templater.parsestring(tmpl)
-        else:
-            style = ui.config('ui', 'style')
-
-    if not (tmpl or style):
-        return changeset_printer(ui, repo, patch, opts, buffered)
-
-    mapfile = None
-    if style and not tmpl:
-        mapfile = style
-        if not os.path.split(mapfile)[0]:
-            mapname = (templater.templatepath('map-cmdline.' + mapfile)
-                       or templater.templatepath(mapfile))
-            if mapname: mapfile = mapname
-
-    try:
-        t = changeset_templater(ui, repo, patch, opts, mapfile, buffered)
-    except SyntaxError, inst:
-        raise util.Abort(inst.args[0])
-    if tmpl: t.use_template(tmpl)
-    return t
-
-def finddate(ui, repo, date):
-    """Find the tipmost changeset that matches the given date spec"""
-    df = util.matchdate(date)
-    get = util.cachefunc(lambda r: repo[r].changeset())
-    changeiter, matchfn = walkchangerevs(ui, repo, [], get, {'rev':None})
-    results = {}
-    for st, rev, fns in changeiter:
-        if st == 'add':
-            d = get(rev)[2]
-            if df(d[0]):
-                results[rev] = d
-        elif st == 'iter':
-            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 walkchangerevs(ui, repo, pats, change, opts):
-    '''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, matchfn) tuple. The iterator
-    yields 3-tuples. They will be of one of the following forms:
-
-    "window", incrementing, lastrev: stepping through a window,
-    positive if walking forwards through revs, last rev in the
-    sequence iterated over - use to reset state for the current window
-
-    "add", rev, fns: out-of-order traversal of the given filenames
-    fns, which changed during revision rev - use to gather data for
-    possible display
-
-    "iter", rev, None: in-order traversal of the revs earlier iterated
-    over with "add" - use to display data'''
-
-    def increasing_windows(start, end, windowsize=8, sizelimit=512):
-        if start < end:
-            while start < end:
-                yield start, min(windowsize, end-start)
-                start += windowsize
-                if windowsize < sizelimit:
-                    windowsize *= 2
-        else:
-            while start > end:
-                yield start, min(windowsize, start-end-1)
-                start -= windowsize
-                if windowsize < sizelimit:
-                    windowsize *= 2
-
-    m = match(repo, pats, opts)
-    follow = opts.get('follow') or opts.get('follow_first')
-
-    if not len(repo):
-        return [], m
-
-    if follow:
-        defrange = '%s:0' % repo['.'].rev()
-    else:
-        defrange = '-1:0'
-    revs = revrange(repo, opts['rev'] or [defrange])
-    wanted = set()
-    slowpath = m.anypats() or (m.files() and opts.get('removed'))
-    fncache = {}
-
-    if not slowpath and not m.files():
-        # No files, no patterns.  Display all revs.
-        wanted = set(revs)
-    copies = []
-    if not slowpath:
-        # Only files, no patterns.  Check the history of each file.
-        def filerevgen(filelog, node):
-            cl_count = len(repo)
-            if node is None:
-                last = len(filelog) - 1
-            else:
-                last = filelog.rev(node)
-            for i, window in increasing_windows(last, nullrev):
-                revs = []
-                for j in xrange(i - window, i + 1):
-                    n = filelog.node(j)
-                    revs.append((filelog.linkrev(j),
-                                 follow and filelog.renamed(n)))
-                for rev in reversed(revs):
-                    # only yield rev for which we have the changelog, it can
-                    # happen while doing "hg log" during a pull or commit
-                    if rev[0] < cl_count:
-                        yield rev
-        def iterfiles():
-            for filename in m.files():
-                yield filename, None
-            for filename_node in copies:
-                yield filename_node
-        minrev, maxrev = min(revs), max(revs)
-        for file_, node in iterfiles():
-            filelog = repo.file(file_)
-            if not len(filelog):
-                if node is None:
-                    # A zero count may be a directory or deleted file, so
-                    # try to find matching entries on the slow path.
-                    if follow:
-                        raise util.Abort(_('cannot follow nonexistent file: "%s"') % file_)
-                    slowpath = True
-                    break
-                else:
-                    ui.warn(_('%s:%s copy source revision cannot be found!\n')
-                            % (file_, short(node)))
-                    continue
-            for rev, copied in filerevgen(filelog, node):
-                if rev <= maxrev:
-                    if rev < minrev:
-                        break
-                    fncache.setdefault(rev, [])
-                    fncache[rev].append(file_)
-                    wanted.add(rev)
-                    if follow and copied:
-                        copies.append(copied)
-    if slowpath:
-        if follow:
-            raise util.Abort(_('can only follow copies/renames for explicit '
-                               'filenames'))
-
-        # The slow path checks files modified in every changeset.
-        def changerevgen():
-            for i, window in increasing_windows(len(repo) - 1, nullrev):
-                for j in xrange(i - window, i + 1):
-                    yield j, change(j)[3]
-
-        for rev, changefiles in changerevgen():
-            matches = filter(m, changefiles)
-            if matches:
-                fncache[rev] = matches
-                wanted.add(rev)
-
-    class followfilter(object):
-        def __init__(self, onlyfirst=False):
-            self.startrev = nullrev
-            self.roots = []
-            self.onlyfirst = onlyfirst
-
-        def match(self, rev):
-            def realparents(rev):
-                if self.onlyfirst:
-                    return repo.changelog.parentrevs(rev)[0:1]
-                else:
-                    return filter(lambda x: x != nullrev,
-                                  repo.changelog.parentrevs(rev))
-
-            if self.startrev == nullrev:
-                self.startrev = rev
-                return True
-
-            if rev > self.startrev:
-                # forward: all descendants
-                if not self.roots:
-                    self.roots.append(self.startrev)
-                for parent in realparents(rev):
-                    if parent in self.roots:
-                        self.roots.append(rev)
-                        return True
-            else:
-                # backwards: all parents
-                if not self.roots:
-                    self.roots.extend(realparents(self.startrev))
-                if rev in self.roots:
-                    self.roots.remove(rev)
-                    self.roots.extend(realparents(rev))
-                    return True
-
-            return False
-
-    # it might be worthwhile to do this in the iterator if the rev range
-    # is descending and the prune args are all within that range
-    for rev in opts.get('prune', ()):
-        rev = repo.changelog.rev(repo.lookup(rev))
-        ff = followfilter()
-        stop = min(revs[0], revs[-1])
-        for x in xrange(rev, stop-1, -1):
-            if ff.match(x):
-                wanted.discard(x)
-
-    def iterate():
-        if follow and not m.files():
-            ff = followfilter(onlyfirst=opts.get('follow_first'))
-            def want(rev):
-                return ff.match(rev) and rev in wanted
-        else:
-            def want(rev):
-                return rev in wanted
-
-        for i, window in increasing_windows(0, len(revs)):
-            yield 'window', revs[0] < revs[-1], revs[-1]
-            nrevs = [rev for rev in revs[i:i+window] if want(rev)]
-            for rev in sorted(nrevs):
-                fns = fncache.get(rev)
-                if not fns:
-                    def fns_generator():
-                        for f in change(rev)[3]:
-                            if m(f):
-                                yield f
-                    fns = fns_generator()
-                yield 'add', rev, fns
-            for rev in nrevs:
-                yield 'iter', rev, None
-    return iterate(), m
-
-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(opts)
-
-    # extract addremove carefully -- this function can be called from a command
-    # that doesn't support addremove
-    if opts.get('addremove'):
-        addremove(repo, pats, opts)
-
-    return commitfunc(ui, repo, message, match(repo, pats, opts), opts)
-
-def commiteditor(repo, ctx, subs):
-    if ctx.description():
-        return ctx.description()
-    return commitforceeditor(repo, ctx, subs)
-
-def commitforceeditor(repo, ctx, subs):
-    edittext = []
-    modified, added, removed = ctx.modified(), ctx.added(), ctx.removed()
-    if ctx.description():
-        edittext.append(ctx.description())
-    edittext.append("")
-    edittext.append("") # Empty line between message and comments.
-    edittext.append(_("HG: Enter commit message."
-                      "  Lines beginning with 'HG:' are removed."))
-    edittext.append(_("HG: Leave message empty to abort commit."))
-    edittext.append("HG: --")
-    edittext.append(_("HG: user: %s") % ctx.user())
-    if ctx.p2():
-        edittext.append(_("HG: branch merge"))
-    if ctx.branch():
-        edittext.append(_("HG: branch '%s'")
-                        % encoding.tolocal(ctx.branch()))
-    edittext.extend([_("HG: subrepo %s") % s for s in subs])
-    edittext.extend([_("HG: added %s") % f for f in added])
-    edittext.extend([_("HG: changed %s") % f for f in modified])
-    edittext.extend([_("HG: removed %s") % f for f in removed])
-    if not added and not modified and not removed:
-        edittext.append(_("HG: no files changed"))
-    edittext.append("")
-    # run editor in the repository root
-    olddir = os.getcwd()
-    os.chdir(repo.root)
-    text = repo.ui.edit("\n".join(edittext), ctx.user())
-    text = re.sub("(?m)^HG:.*\n", "", text)
-    os.chdir(olddir)
-
-    if not text.strip():
-        raise util.Abort(_("empty commit message"))
-
-    return text