diff upmana/mercurial/localrepo.py @ 121:496dbf12a6cb alpha

Traipse Alpha 'OpenRPG' {091030-00} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user. Update Summary (Cleaning up for Beta): Adds Bookmarks (Alpha) with cool Smiley Star and Plus Symbol images! Changes made to the map for increased portability. SnowDog has changes planned in Core, though. Added an initial push to the BCG. Not much to see, just shows off how it is re-writing Main code. Fix to remote admin commands Minor fix to texted based server, works in /System/ folder Some Core changes to gametree to correctly disply Pretty Print, thanks David! Fix to Splitter Nodes not being created. Added images to Plugin Control panel for Autostart feature Fix to massive amounts of images loading; from Core fix to gsclient so with_statement imports Added 'boot' command to remote admin Prep work in Pass tool for remote admin rankings and different passwords, ei, Server, Admin, Moderator, etc. Remote Admin Commands more organized, more prep work. Added Confirmation window for sent nodes. Minor changes to allow for portability to an OpenSUSE linux OS (hopefully without breaking) {091028} Made changes to gametree to start working with Element Tree, mostly from Core Minor changes to Map to start working with Element Tree, from Core Preliminary changes to map efficiency, from FlexiRPG Miniatures Layer pop up box allows users to turn off Mini labels, from FlexiRPG Changes to main.py to start working with Element Tree {091029} Changes made to server to start working with Element Tree. Changes made to Meta Server Lib. Prepping test work for a multi meta network page. Minor bug fixed with mini to gametree Zoom Mouse plugin added. {091030} Getting ready for Beta. Server needs debugging so Alpha remains bugged. Plugin UI code cleaned. Auto start works with a graphic, pop-up asks to enable or disable plugin. Update Manager now has a partially working Status Bar. Status Bar captures terminal text, so Merc out put is visible. Manifest.xml file, will be renamed, is now much cleaner. Debug Console has a clear button and a Report Bug button. Prep work for a Term2Win class in Debug Console. Known: Current Alpha fails in Windows.
author sirebral
date Fri, 30 Oct 2009 22:21:40 -0500
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upmana/mercurial/localrepo.py	Fri Oct 30 22:21:40 2009 -0500
@@ -0,0 +1,2191 @@
+# localrepo.py - read/write repository class for 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 bin, hex, nullid, nullrev, short
+from i18n import _
+import repo, changegroup, subrepo
+import changelog, dirstate, filelog, manifest, context
+import lock, transaction, store, encoding
+import util, extensions, hook, error
+import match as match_
+import merge as merge_
+from lock import release
+import weakref, stat, errno, os, time, inspect
+propertycache = util.propertycache
+
+class localrepository(repo.repository):
+    capabilities = set(('lookup', 'changegroupsubset', 'branchmap'))
+    supported = set('revlogv1 store fncache shared'.split())
+
+    def __init__(self, baseui, path=None, create=0):
+        repo.repository.__init__(self)
+        self.root = os.path.realpath(path)
+        self.path = os.path.join(self.root, ".hg")
+        self.origroot = path
+        self.opener = util.opener(self.path)
+        self.wopener = util.opener(self.root)
+        self.baseui = baseui
+        self.ui = baseui.copy()
+
+        try:
+            self.ui.readconfig(self.join("hgrc"), self.root)
+            extensions.loadall(self.ui)
+        except IOError:
+            pass
+
+        if not os.path.isdir(self.path):
+            if create:
+                if not os.path.exists(path):
+                    os.mkdir(path)
+                os.mkdir(self.path)
+                requirements = ["revlogv1"]
+                if self.ui.configbool('format', 'usestore', True):
+                    os.mkdir(os.path.join(self.path, "store"))
+                    requirements.append("store")
+                    if self.ui.configbool('format', 'usefncache', True):
+                        requirements.append("fncache")
+                    # create an invalid changelog
+                    self.opener("00changelog.i", "a").write(
+                        '\0\0\0\2' # represents revlogv2
+                        ' dummy changelog to prevent using the old repo layout'
+                    )
+                reqfile = self.opener("requires", "w")
+                for r in requirements:
+                    reqfile.write("%s\n" % r)
+                reqfile.close()
+            else:
+                raise error.RepoError(_("repository %s not found") % path)
+        elif create:
+            raise error.RepoError(_("repository %s already exists") % path)
+        else:
+            # find requirements
+            requirements = set()
+            try:
+                requirements = set(self.opener("requires").read().splitlines())
+            except IOError, inst:
+                if inst.errno != errno.ENOENT:
+                    raise
+            for r in requirements - self.supported:
+                raise error.RepoError(_("requirement '%s' not supported") % r)
+
+        self.sharedpath = self.path
+        try:
+            s = os.path.realpath(self.opener("sharedpath").read())
+            if not os.path.exists(s):
+                raise error.RepoError(
+                    _('.hg/sharedpath points to nonexistent directory %s') % s)
+            self.sharedpath = s
+        except IOError, inst:
+            if inst.errno != errno.ENOENT:
+                raise
+
+        self.store = store.store(requirements, self.sharedpath, util.opener)
+        self.spath = self.store.path
+        self.sopener = self.store.opener
+        self.sjoin = self.store.join
+        self.opener.createmode = self.store.createmode
+
+        self.tagscache = None
+        self._tagstypecache = None
+        self.branchcache = None
+        self._ubranchcache = None  # UTF-8 version of branchcache
+        self._branchcachetip = None
+        self.nodetagscache = None
+        self.filterpats = {}
+        self._datafilters = {}
+        self._transref = self._lockref = self._wlockref = None
+
+    @propertycache
+    def changelog(self):
+        c = changelog.changelog(self.sopener)
+        if 'HG_PENDING' in os.environ:
+            p = os.environ['HG_PENDING']
+            if p.startswith(self.root):
+                c.readpending('00changelog.i.a')
+        self.sopener.defversion = c.version
+        return c
+
+    @propertycache
+    def manifest(self):
+        return manifest.manifest(self.sopener)
+
+    @propertycache
+    def dirstate(self):
+        return dirstate.dirstate(self.opener, self.ui, self.root)
+
+    def __getitem__(self, changeid):
+        if changeid is None:
+            return context.workingctx(self)
+        return context.changectx(self, changeid)
+
+    def __nonzero__(self):
+        return True
+
+    def __len__(self):
+        return len(self.changelog)
+
+    def __iter__(self):
+        for i in xrange(len(self)):
+            yield i
+
+    def url(self):
+        return 'file:' + self.root
+
+    def hook(self, name, throw=False, **args):
+        return hook.hook(self.ui, self, name, throw, **args)
+
+    tag_disallowed = ':\r\n'
+
+    def _tag(self, names, node, message, local, user, date, extra={}):
+        if isinstance(names, str):
+            allchars = names
+            names = (names,)
+        else:
+            allchars = ''.join(names)
+        for c in self.tag_disallowed:
+            if c in allchars:
+                raise util.Abort(_('%r cannot be used in a tag name') % c)
+
+        for name in names:
+            self.hook('pretag', throw=True, node=hex(node), tag=name,
+                      local=local)
+
+        def writetags(fp, names, munge, prevtags):
+            fp.seek(0, 2)
+            if prevtags and prevtags[-1] != '\n':
+                fp.write('\n')
+            for name in names:
+                m = munge and munge(name) or name
+                if self._tagstypecache and name in self._tagstypecache:
+                    old = self.tagscache.get(name, nullid)
+                    fp.write('%s %s\n' % (hex(old), m))
+                fp.write('%s %s\n' % (hex(node), m))
+            fp.close()
+
+        prevtags = ''
+        if local:
+            try:
+                fp = self.opener('localtags', 'r+')
+            except IOError:
+                fp = self.opener('localtags', 'a')
+            else:
+                prevtags = fp.read()
+
+            # local tags are stored in the current charset
+            writetags(fp, names, None, prevtags)
+            for name in names:
+                self.hook('tag', node=hex(node), tag=name, local=local)
+            return
+
+        try:
+            fp = self.wfile('.hgtags', 'rb+')
+        except IOError:
+            fp = self.wfile('.hgtags', 'ab')
+        else:
+            prevtags = fp.read()
+
+        # committed tags are stored in UTF-8
+        writetags(fp, names, encoding.fromlocal, prevtags)
+
+        if '.hgtags' not in self.dirstate:
+            self.add(['.hgtags'])
+
+        m = match_.exact(self.root, '', ['.hgtags'])
+        tagnode = self.commit(message, user, date, extra=extra, match=m)
+
+        for name in names:
+            self.hook('tag', node=hex(node), tag=name, local=local)
+
+        return tagnode
+
+    def tag(self, names, node, message, local, user, date):
+        '''tag a revision with one or more symbolic names.
+
+        names is a list of strings or, when adding a single tag, names may be a
+        string.
+
+        if local is True, the tags are stored in a per-repository file.
+        otherwise, they are stored in the .hgtags file, and a new
+        changeset is committed with the change.
+
+        keyword arguments:
+
+        local: whether to store tags in non-version-controlled file
+        (default False)
+
+        message: commit message to use if committing
+
+        user: name of user to use if committing
+
+        date: date tuple to use if committing'''
+
+        for x in self.status()[:5]:
+            if '.hgtags' in x:
+                raise util.Abort(_('working copy of .hgtags is changed '
+                                   '(please commit .hgtags manually)'))
+
+        self.tags() # instantiate the cache
+        self._tag(names, node, message, local, user, date)
+
+    def tags(self):
+        '''return a mapping of tag to node'''
+        if self.tagscache:
+            return self.tagscache
+
+        globaltags = {}
+        tagtypes = {}
+
+        def readtags(lines, fn, tagtype):
+            filetags = {}
+            count = 0
+
+            def warn(msg):
+                self.ui.warn(_("%s, line %s: %s\n") % (fn, count, msg))
+
+            for l in lines:
+                count += 1
+                if not l:
+                    continue
+                s = l.split(" ", 1)
+                if len(s) != 2:
+                    warn(_("cannot parse entry"))
+                    continue
+                node, key = s
+                key = encoding.tolocal(key.strip()) # stored in UTF-8
+                try:
+                    bin_n = bin(node)
+                except TypeError:
+                    warn(_("node '%s' is not well formed") % node)
+                    continue
+                if bin_n not in self.changelog.nodemap:
+                    # silently ignore as pull -r might cause this
+                    continue
+
+                h = []
+                if key in filetags:
+                    n, h = filetags[key]
+                    h.append(n)
+                filetags[key] = (bin_n, h)
+
+            for k, nh in filetags.iteritems():
+                if k not in globaltags:
+                    globaltags[k] = nh
+                    tagtypes[k] = tagtype
+                    continue
+
+                # we prefer the global tag if:
+                #  it supercedes us OR
+                #  mutual supercedes and it has a higher rank
+                # otherwise we win because we're tip-most
+                an, ah = nh
+                bn, bh = globaltags[k]
+                if (bn != an and an in bh and
+                    (bn not in ah or len(bh) > len(ah))):
+                    an = bn
+                ah.extend([n for n in bh if n not in ah])
+                globaltags[k] = an, ah
+                tagtypes[k] = tagtype
+
+        seen = set()
+        f = None
+        ctxs = []
+        for node in self.heads():
+            try:
+                fnode = self[node].filenode('.hgtags')
+            except error.LookupError:
+                continue
+            if fnode not in seen:
+                seen.add(fnode)
+                if not f:
+                    f = self.filectx('.hgtags', fileid=fnode)
+                else:
+                    f = f.filectx(fnode)
+                ctxs.append(f)
+
+        # read the tags file from each head, ending with the tip
+        for f in reversed(ctxs):
+            readtags(f.data().splitlines(), f, "global")
+
+        try:
+            data = encoding.fromlocal(self.opener("localtags").read())
+            # localtags are stored in the local character set
+            # while the internal tag table is stored in UTF-8
+            readtags(data.splitlines(), "localtags", "local")
+        except IOError:
+            pass
+
+        self.tagscache = {}
+        self._tagstypecache = {}
+        for k, nh in globaltags.iteritems():
+            n = nh[0]
+            if n != nullid:
+                self.tagscache[k] = n
+            self._tagstypecache[k] = tagtypes[k]
+        self.tagscache['tip'] = self.changelog.tip()
+        return self.tagscache
+
+    def tagtype(self, tagname):
+        '''
+        return the type of the given tag. result can be:
+
+        'local'  : a local tag
+        'global' : a global tag
+        None     : tag does not exist
+        '''
+
+        self.tags()
+
+        return self._tagstypecache.get(tagname)
+
+    def tagslist(self):
+        '''return a list of tags ordered by revision'''
+        l = []
+        for t, n in self.tags().iteritems():
+            try:
+                r = self.changelog.rev(n)
+            except:
+                r = -2 # sort to the beginning of the list if unknown
+            l.append((r, t, n))
+        return [(t, n) for r, t, n in sorted(l)]
+
+    def nodetags(self, node):
+        '''return the tags associated with a node'''
+        if not self.nodetagscache:
+            self.nodetagscache = {}
+            for t, n in self.tags().iteritems():
+                self.nodetagscache.setdefault(n, []).append(t)
+        return self.nodetagscache.get(node, [])
+
+    def _branchtags(self, partial, lrev):
+        # TODO: rename this function?
+        tiprev = len(self) - 1
+        if lrev != tiprev:
+            self._updatebranchcache(partial, lrev+1, tiprev+1)
+            self._writebranchcache(partial, self.changelog.tip(), tiprev)
+
+        return partial
+
+    def branchmap(self):
+        tip = self.changelog.tip()
+        if self.branchcache is not None and self._branchcachetip == tip:
+            return self.branchcache
+
+        oldtip = self._branchcachetip
+        self._branchcachetip = tip
+        if self.branchcache is None:
+            self.branchcache = {} # avoid recursion in changectx
+        else:
+            self.branchcache.clear() # keep using the same dict
+        if oldtip is None or oldtip not in self.changelog.nodemap:
+            partial, last, lrev = self._readbranchcache()
+        else:
+            lrev = self.changelog.rev(oldtip)
+            partial = self._ubranchcache
+
+        self._branchtags(partial, lrev)
+        # this private cache holds all heads (not just tips)
+        self._ubranchcache = partial
+
+        # the branch cache is stored on disk as UTF-8, but in the local
+        # charset internally
+        for k, v in partial.iteritems():
+            self.branchcache[encoding.tolocal(k)] = v
+        return self.branchcache
+
+
+    def branchtags(self):
+        '''return a dict where branch names map to the tipmost head of
+        the branch, open heads come before closed'''
+        bt = {}
+        for bn, heads in self.branchmap().iteritems():
+            head = None
+            for i in range(len(heads)-1, -1, -1):
+                h = heads[i]
+                if 'close' not in self.changelog.read(h)[5]:
+                    head = h
+                    break
+            # no open heads were found
+            if head is None:
+                head = heads[-1]
+            bt[bn] = head
+        return bt
+
+
+    def _readbranchcache(self):
+        partial = {}
+        try:
+            f = self.opener("branchheads.cache")
+            lines = f.read().split('\n')
+            f.close()
+        except (IOError, OSError):
+            return {}, nullid, nullrev
+
+        try:
+            last, lrev = lines.pop(0).split(" ", 1)
+            last, lrev = bin(last), int(lrev)
+            if lrev >= len(self) or self[lrev].node() != last:
+                # invalidate the cache
+                raise ValueError('invalidating branch cache (tip differs)')
+            for l in lines:
+                if not l: continue
+                node, label = l.split(" ", 1)
+                partial.setdefault(label.strip(), []).append(bin(node))
+        except KeyboardInterrupt:
+            raise
+        except Exception, inst:
+            if self.ui.debugflag:
+                self.ui.warn(str(inst), '\n')
+            partial, last, lrev = {}, nullid, nullrev
+        return partial, last, lrev
+
+    def _writebranchcache(self, branches, tip, tiprev):
+        try:
+            f = self.opener("branchheads.cache", "w", atomictemp=True)
+            f.write("%s %s\n" % (hex(tip), tiprev))
+            for label, nodes in branches.iteritems():
+                for node in nodes:
+                    f.write("%s %s\n" % (hex(node), label))
+            f.rename()
+        except (IOError, OSError):
+            pass
+
+    def _updatebranchcache(self, partial, start, end):
+        # collect new branch entries
+        newbranches = {}
+        for r in xrange(start, end):
+            c = self[r]
+            newbranches.setdefault(c.branch(), []).append(c.node())
+        # if older branchheads are reachable from new ones, they aren't
+        # really branchheads. Note checking parents is insufficient:
+        # 1 (branch a) -> 2 (branch b) -> 3 (branch a)
+        for branch, newnodes in newbranches.iteritems():
+            bheads = partial.setdefault(branch, [])
+            bheads.extend(newnodes)
+            if len(bheads) < 2:
+                continue
+            newbheads = []
+            # starting from tip means fewer passes over reachable
+            while newnodes:
+                latest = newnodes.pop()
+                if latest not in bheads:
+                    continue
+                minbhrev = self[min([self[bh].rev() for bh in bheads])].node()
+                reachable = self.changelog.reachable(latest, minbhrev)
+                bheads = [b for b in bheads if b not in reachable]
+                newbheads.insert(0, latest)
+            bheads.extend(newbheads)
+            partial[branch] = bheads
+
+    def lookup(self, key):
+        if isinstance(key, int):
+            return self.changelog.node(key)
+        elif key == '.':
+            return self.dirstate.parents()[0]
+        elif key == 'null':
+            return nullid
+        elif key == 'tip':
+            return self.changelog.tip()
+        n = self.changelog._match(key)
+        if n:
+            return n
+        if key in self.tags():
+            return self.tags()[key]
+        if key in self.branchtags():
+            return self.branchtags()[key]
+        n = self.changelog._partialmatch(key)
+        if n:
+            return n
+
+        # can't find key, check if it might have come from damaged dirstate
+        if key in self.dirstate.parents():
+            raise error.Abort(_("working directory has unknown parent '%s'!")
+                              % short(key))
+        try:
+            if len(key) == 20:
+                key = hex(key)
+        except:
+            pass
+        raise error.RepoError(_("unknown revision '%s'") % key)
+
+    def local(self):
+        return True
+
+    def join(self, f):
+        return os.path.join(self.path, f)
+
+    def wjoin(self, f):
+        return os.path.join(self.root, f)
+
+    def rjoin(self, f):
+        return os.path.join(self.root, util.pconvert(f))
+
+    def file(self, f):
+        if f[0] == '/':
+            f = f[1:]
+        return filelog.filelog(self.sopener, f)
+
+    def changectx(self, changeid):
+        return self[changeid]
+
+    def parents(self, changeid=None):
+        '''get list of changectxs for parents of changeid'''
+        return self[changeid].parents()
+
+    def filectx(self, path, changeid=None, fileid=None):
+        """changeid can be a changeset revision, node, or tag.
+           fileid can be a file revision or node."""
+        return context.filectx(self, path, changeid, fileid)
+
+    def getcwd(self):
+        return self.dirstate.getcwd()
+
+    def pathto(self, f, cwd=None):
+        return self.dirstate.pathto(f, cwd)
+
+    def wfile(self, f, mode='r'):
+        return self.wopener(f, mode)
+
+    def _link(self, f):
+        return os.path.islink(self.wjoin(f))
+
+    def _filter(self, filter, filename, data):
+        if filter not in self.filterpats:
+            l = []
+            for pat, cmd in self.ui.configitems(filter):
+                if cmd == '!':
+                    continue
+                mf = match_.match(self.root, '', [pat])
+                fn = None
+                params = cmd
+                for name, filterfn in self._datafilters.iteritems():
+                    if cmd.startswith(name):
+                        fn = filterfn
+                        params = cmd[len(name):].lstrip()
+                        break
+                if not fn:
+                    fn = lambda s, c, **kwargs: util.filter(s, c)
+                # Wrap old filters not supporting keyword arguments
+                if not inspect.getargspec(fn)[2]:
+                    oldfn = fn
+                    fn = lambda s, c, **kwargs: oldfn(s, c)
+                l.append((mf, fn, params))
+            self.filterpats[filter] = l
+
+        for mf, fn, cmd in self.filterpats[filter]:
+            if mf(filename):
+                self.ui.debug(_("filtering %s through %s\n") % (filename, cmd))
+                data = fn(data, cmd, ui=self.ui, repo=self, filename=filename)
+                break
+
+        return data
+
+    def adddatafilter(self, name, filter):
+        self._datafilters[name] = filter
+
+    def wread(self, filename):
+        if self._link(filename):
+            data = os.readlink(self.wjoin(filename))
+        else:
+            data = self.wopener(filename, 'r').read()
+        return self._filter("encode", filename, data)
+
+    def wwrite(self, filename, data, flags):
+        data = self._filter("decode", filename, data)
+        try:
+            os.unlink(self.wjoin(filename))
+        except OSError:
+            pass
+        if 'l' in flags:
+            self.wopener.symlink(data, filename)
+        else:
+            self.wopener(filename, 'w').write(data)
+            if 'x' in flags:
+                util.set_flags(self.wjoin(filename), False, True)
+
+    def wwritedata(self, filename, data):
+        return self._filter("decode", filename, data)
+
+    def transaction(self):
+        tr = self._transref and self._transref() or None
+        if tr and tr.running():
+            return tr.nest()
+
+        # abort here if the journal already exists
+        if os.path.exists(self.sjoin("journal")):
+            raise error.RepoError(_("journal already exists - run hg recover"))
+
+        # save dirstate for rollback
+        try:
+            ds = self.opener("dirstate").read()
+        except IOError:
+            ds = ""
+        self.opener("journal.dirstate", "w").write(ds)
+        self.opener("journal.branch", "w").write(self.dirstate.branch())
+
+        renames = [(self.sjoin("journal"), self.sjoin("undo")),
+                   (self.join("journal.dirstate"), self.join("undo.dirstate")),
+                   (self.join("journal.branch"), self.join("undo.branch"))]
+        tr = transaction.transaction(self.ui.warn, self.sopener,
+                                     self.sjoin("journal"),
+                                     aftertrans(renames),
+                                     self.store.createmode)
+        self._transref = weakref.ref(tr)
+        return tr
+
+    def recover(self):
+        lock = self.lock()
+        try:
+            if os.path.exists(self.sjoin("journal")):
+                self.ui.status(_("rolling back interrupted transaction\n"))
+                transaction.rollback(self.sopener, self.sjoin("journal"), self.ui.warn)
+                self.invalidate()
+                return True
+            else:
+                self.ui.warn(_("no interrupted transaction available\n"))
+                return False
+        finally:
+            lock.release()
+
+    def rollback(self):
+        wlock = lock = None
+        try:
+            wlock = self.wlock()
+            lock = self.lock()
+            if os.path.exists(self.sjoin("undo")):
+                self.ui.status(_("rolling back last transaction\n"))
+                transaction.rollback(self.sopener, self.sjoin("undo"), self.ui.warn)
+                util.rename(self.join("undo.dirstate"), self.join("dirstate"))
+                try:
+                    branch = self.opener("undo.branch").read()
+                    self.dirstate.setbranch(branch)
+                except IOError:
+                    self.ui.warn(_("Named branch could not be reset, "
+                                   "current branch still is: %s\n")
+                                 % encoding.tolocal(self.dirstate.branch()))
+                self.invalidate()
+                self.dirstate.invalidate()
+            else:
+                self.ui.warn(_("no rollback information available\n"))
+        finally:
+            release(lock, wlock)
+
+    def invalidate(self):
+        for a in "changelog manifest".split():
+            if a in self.__dict__:
+                delattr(self, a)
+        self.tagscache = None
+        self._tagstypecache = None
+        self.nodetagscache = None
+        self.branchcache = None
+        self._ubranchcache = None
+        self._branchcachetip = None
+
+    def _lock(self, lockname, wait, releasefn, acquirefn, desc):
+        try:
+            l = lock.lock(lockname, 0, releasefn, desc=desc)
+        except error.LockHeld, inst:
+            if not wait:
+                raise
+            self.ui.warn(_("waiting for lock on %s held by %r\n") %
+                         (desc, inst.locker))
+            # default to 600 seconds timeout
+            l = lock.lock(lockname, int(self.ui.config("ui", "timeout", "600")),
+                          releasefn, desc=desc)
+        if acquirefn:
+            acquirefn()
+        return l
+
+    def lock(self, wait=True):
+        l = self._lockref and self._lockref()
+        if l is not None and l.held:
+            l.lock()
+            return l
+
+        l = self._lock(self.sjoin("lock"), wait, None, self.invalidate,
+                       _('repository %s') % self.origroot)
+        self._lockref = weakref.ref(l)
+        return l
+
+    def wlock(self, wait=True):
+        l = self._wlockref and self._wlockref()
+        if l is not None and l.held:
+            l.lock()
+            return l
+
+        l = self._lock(self.join("wlock"), wait, self.dirstate.write,
+                       self.dirstate.invalidate, _('working directory of %s') %
+                       self.origroot)
+        self._wlockref = weakref.ref(l)
+        return l
+
+    def _filecommit(self, fctx, manifest1, manifest2, linkrev, tr, changelist):
+        """
+        commit an individual file as part of a larger transaction
+        """
+
+        fname = fctx.path()
+        text = fctx.data()
+        flog = self.file(fname)
+        fparent1 = manifest1.get(fname, nullid)
+        fparent2 = fparent2o = manifest2.get(fname, nullid)
+
+        meta = {}
+        copy = fctx.renamed()
+        if copy and copy[0] != fname:
+            # Mark the new revision of this file as a copy of another
+            # file.  This copy data will effectively act as a parent
+            # of this new revision.  If this is a merge, the first
+            # parent will be the nullid (meaning "look up the copy data")
+            # and the second one will be the other parent.  For example:
+            #
+            # 0 --- 1 --- 3   rev1 changes file foo
+            #   \       /     rev2 renames foo to bar and changes it
+            #    \- 2 -/      rev3 should have bar with all changes and
+            #                      should record that bar descends from
+            #                      bar in rev2 and foo in rev1
+            #
+            # this allows this merge to succeed:
+            #
+            # 0 --- 1 --- 3   rev4 reverts the content change from rev2
+            #   \       /     merging rev3 and rev4 should use bar@rev2
+            #    \- 2 --- 4        as the merge base
+            #
+
+            cfname = copy[0]
+            crev = manifest1.get(cfname)
+            newfparent = fparent2
+
+            if manifest2: # branch merge
+                if fparent2 == nullid or crev is None: # copied on remote side
+                    if cfname in manifest2:
+                        crev = manifest2[cfname]
+                        newfparent = fparent1
+
+            # find source in nearest ancestor if we've lost track
+            if not crev:
+                self.ui.debug(_(" %s: searching for copy revision for %s\n") %
+                              (fname, cfname))
+                for ancestor in self['.'].ancestors():
+                    if cfname in ancestor:
+                        crev = ancestor[cfname].filenode()
+                        break
+
+            self.ui.debug(_(" %s: copy %s:%s\n") % (fname, cfname, hex(crev)))
+            meta["copy"] = cfname
+            meta["copyrev"] = hex(crev)
+            fparent1, fparent2 = nullid, newfparent
+        elif fparent2 != nullid:
+            # is one parent an ancestor of the other?
+            fparentancestor = flog.ancestor(fparent1, fparent2)
+            if fparentancestor == fparent1:
+                fparent1, fparent2 = fparent2, nullid
+            elif fparentancestor == fparent2:
+                fparent2 = nullid
+
+        # is the file changed?
+        if fparent2 != nullid or flog.cmp(fparent1, text) or meta:
+            changelist.append(fname)
+            return flog.add(text, meta, tr, linkrev, fparent1, fparent2)
+
+        # are just the flags changed during merge?
+        if fparent1 !=  fparent2o and manifest1.flags(fname) != fctx.flags():
+            changelist.append(fname)
+
+        return fparent1
+
+    def commit(self, text="", user=None, date=None, match=None, force=False,
+               editor=False, extra={}):
+        """Add a new revision to current repository.
+
+        Revision information is gathered from the working directory,
+        match can be used to filter the committed files. If editor is
+        supplied, it is called to get a commit message.
+        """
+
+        def fail(f, msg):
+            raise util.Abort('%s: %s' % (f, msg))
+
+        if not match:
+            match = match_.always(self.root, '')
+
+        if not force:
+            vdirs = []
+            match.dir = vdirs.append
+            match.bad = fail
+
+        wlock = self.wlock()
+        try:
+            p1, p2 = self.dirstate.parents()
+            wctx = self[None]
+
+            if (not force and p2 != nullid and match and
+                (match.files() or match.anypats())):
+                raise util.Abort(_('cannot partially commit a merge '
+                                   '(do not specify files or patterns)'))
+
+            changes = self.status(match=match, clean=force)
+            if force:
+                changes[0].extend(changes[6]) # mq may commit unchanged files
+
+            # check subrepos
+            subs = []
+            for s in wctx.substate:
+                if match(s) and wctx.sub(s).dirty():
+                    subs.append(s)
+            if subs and '.hgsubstate' not in changes[0]:
+                changes[0].insert(0, '.hgsubstate')
+
+            # make sure all explicit patterns are matched
+            if not force and match.files():
+                matched = set(changes[0] + changes[1] + changes[2])
+
+                for f in match.files():
+                    if f == '.' or f in matched or f in wctx.substate:
+                        continue
+                    if f in changes[3]: # missing
+                        fail(f, _('file not found!'))
+                    if f in vdirs: # visited directory
+                        d = f + '/'
+                        for mf in matched:
+                            if mf.startswith(d):
+                                break
+                        else:
+                            fail(f, _("no match under directory!"))
+                    elif f not in self.dirstate:
+                        fail(f, _("file not tracked!"))
+
+            if (not force and not extra.get("close") and p2 == nullid
+                and not (changes[0] or changes[1] or changes[2])
+                and self[None].branch() == self['.'].branch()):
+                return None
+
+            ms = merge_.mergestate(self)
+            for f in changes[0]:
+                if f in ms and ms[f] == 'u':
+                    raise util.Abort(_("unresolved merge conflicts "
+                                                    "(see hg resolve)"))
+
+            cctx = context.workingctx(self, (p1, p2), text, user, date,
+                                      extra, changes)
+            if editor:
+                cctx._text = editor(self, cctx, subs)
+
+            # commit subs
+            if subs:
+                state = wctx.substate.copy()
+                for s in subs:
+                    self.ui.status(_('committing subrepository %s\n') % s)
+                    sr = wctx.sub(s).commit(cctx._text, user, date)
+                    state[s] = (state[s][0], sr)
+                subrepo.writestate(self, state)
+
+            ret = self.commitctx(cctx, True)
+
+            # update dirstate and mergestate
+            for f in changes[0] + changes[1]:
+                self.dirstate.normal(f)
+            for f in changes[2]:
+                self.dirstate.forget(f)
+            self.dirstate.setparents(ret)
+            ms.reset()
+
+            return ret
+
+        finally:
+            wlock.release()
+
+    def commitctx(self, ctx, error=False):
+        """Add a new revision to current repository.
+
+        Revision information is passed via the context argument.
+        """
+
+        tr = lock = None
+        removed = ctx.removed()
+        p1, p2 = ctx.p1(), ctx.p2()
+        m1 = p1.manifest().copy()
+        m2 = p2.manifest()
+        user = ctx.user()
+
+        xp1, xp2 = p1.hex(), p2 and p2.hex() or ''
+        self.hook("precommit", throw=True, parent1=xp1, parent2=xp2)
+
+        lock = self.lock()
+        try:
+            tr = self.transaction()
+            trp = weakref.proxy(tr)
+
+            # check in files
+            new = {}
+            changed = []
+            linkrev = len(self)
+            for f in sorted(ctx.modified() + ctx.added()):
+                self.ui.note(f + "\n")
+                try:
+                    fctx = ctx[f]
+                    new[f] = self._filecommit(fctx, m1, m2, linkrev, trp,
+                                              changed)
+                    m1.set(f, fctx.flags())
+                except (OSError, IOError):
+                    if error:
+                        self.ui.warn(_("trouble committing %s!\n") % f)
+                        raise
+                    else:
+                        removed.append(f)
+
+            # update manifest
+            m1.update(new)
+            removed = [f for f in sorted(removed) if f in m1 or f in m2]
+            drop = [f for f in removed if f in m1]
+            for f in drop:
+                del m1[f]
+            mn = self.manifest.add(m1, trp, linkrev, p1.manifestnode(),
+                                   p2.manifestnode(), (new, drop))
+
+            # update changelog
+            self.changelog.delayupdate()
+            n = self.changelog.add(mn, changed + removed, ctx.description(),
+                                   trp, p1.node(), p2.node(),
+                                   user, ctx.date(), ctx.extra().copy())
+            p = lambda: self.changelog.writepending() and self.root or ""
+            self.hook('pretxncommit', throw=True, node=hex(n), parent1=xp1,
+                      parent2=xp2, pending=p)
+            self.changelog.finalize(trp)
+            tr.close()
+
+            if self.branchcache:
+                self.branchtags()
+
+            self.hook("commit", node=hex(n), parent1=xp1, parent2=xp2)
+            return n
+        finally:
+            del tr
+            lock.release()
+
+    def walk(self, match, node=None):
+        '''
+        walk recursively through the directory tree or a given
+        changeset, finding all files matched by the match
+        function
+        '''
+        return self[node].walk(match)
+
+    def status(self, node1='.', node2=None, match=None,
+               ignored=False, clean=False, unknown=False):
+        """return status of files between two nodes or node and working directory
+
+        If node1 is None, use the first dirstate parent instead.
+        If node2 is None, compare node1 with working directory.
+        """
+
+        def mfmatches(ctx):
+            mf = ctx.manifest().copy()
+            for fn in mf.keys():
+                if not match(fn):
+                    del mf[fn]
+            return mf
+
+        if isinstance(node1, context.changectx):
+            ctx1 = node1
+        else:
+            ctx1 = self[node1]
+        if isinstance(node2, context.changectx):
+            ctx2 = node2
+        else:
+            ctx2 = self[node2]
+
+        working = ctx2.rev() is None
+        parentworking = working and ctx1 == self['.']
+        match = match or match_.always(self.root, self.getcwd())
+        listignored, listclean, listunknown = ignored, clean, unknown
+
+        # load earliest manifest first for caching reasons
+        if not working and ctx2.rev() < ctx1.rev():
+            ctx2.manifest()
+
+        if not parentworking:
+            def bad(f, msg):
+                if f not in ctx1:
+                    self.ui.warn('%s: %s\n' % (self.dirstate.pathto(f), msg))
+            match.bad = bad
+
+        if working: # we need to scan the working dir
+            s = self.dirstate.status(match, listignored, listclean, listunknown)
+            cmp, modified, added, removed, deleted, unknown, ignored, clean = s
+
+            # check for any possibly clean files
+            if parentworking and cmp:
+                fixup = []
+                # do a full compare of any files that might have changed
+                for f in sorted(cmp):
+                    if (f not in ctx1 or ctx2.flags(f) != ctx1.flags(f)
+                        or ctx1[f].cmp(ctx2[f].data())):
+                        modified.append(f)
+                    else:
+                        fixup.append(f)
+
+                if listclean:
+                    clean += fixup
+
+                # update dirstate for files that are actually clean
+                if fixup:
+                    try:
+                        # updating the dirstate is optional
+                        # so we don't wait on the lock
+                        wlock = self.wlock(False)
+                        try:
+                            for f in fixup:
+                                self.dirstate.normal(f)
+                        finally:
+                            wlock.release()
+                    except error.LockError:
+                        pass
+
+        if not parentworking:
+            mf1 = mfmatches(ctx1)
+            if working:
+                # we are comparing working dir against non-parent
+                # generate a pseudo-manifest for the working dir
+                mf2 = mfmatches(self['.'])
+                for f in cmp + modified + added:
+                    mf2[f] = None
+                    mf2.set(f, ctx2.flags(f))
+                for f in removed:
+                    if f in mf2:
+                        del mf2[f]
+            else:
+                # we are comparing two revisions
+                deleted, unknown, ignored = [], [], []
+                mf2 = mfmatches(ctx2)
+
+            modified, added, clean = [], [], []
+            for fn in mf2:
+                if fn in mf1:
+                    if (mf1.flags(fn) != mf2.flags(fn) or
+                        (mf1[fn] != mf2[fn] and
+                         (mf2[fn] or ctx1[fn].cmp(ctx2[fn].data())))):
+                        modified.append(fn)
+                    elif listclean:
+                        clean.append(fn)
+                    del mf1[fn]
+                else:
+                    added.append(fn)
+            removed = mf1.keys()
+
+        r = modified, added, removed, deleted, unknown, ignored, clean
+        [l.sort() for l in r]
+        return r
+
+    def add(self, list):
+        wlock = self.wlock()
+        try:
+            rejected = []
+            for f in list:
+                p = self.wjoin(f)
+                try:
+                    st = os.lstat(p)
+                except:
+                    self.ui.warn(_("%s does not exist!\n") % f)
+                    rejected.append(f)
+                    continue
+                if st.st_size > 10000000:
+                    self.ui.warn(_("%s: files over 10MB may cause memory and"
+                                   " performance problems\n"
+                                   "(use 'hg revert %s' to unadd the file)\n")
+                                   % (f, f))
+                if not (stat.S_ISREG(st.st_mode) or stat.S_ISLNK(st.st_mode)):
+                    self.ui.warn(_("%s not added: only files and symlinks "
+                                   "supported currently\n") % f)
+                    rejected.append(p)
+                elif self.dirstate[f] in 'amn':
+                    self.ui.warn(_("%s already tracked!\n") % f)
+                elif self.dirstate[f] == 'r':
+                    self.dirstate.normallookup(f)
+                else:
+                    self.dirstate.add(f)
+            return rejected
+        finally:
+            wlock.release()
+
+    def forget(self, list):
+        wlock = self.wlock()
+        try:
+            for f in list:
+                if self.dirstate[f] != 'a':
+                    self.ui.warn(_("%s not added!\n") % f)
+                else:
+                    self.dirstate.forget(f)
+        finally:
+            wlock.release()
+
+    def remove(self, list, unlink=False):
+        if unlink:
+            for f in list:
+                try:
+                    util.unlink(self.wjoin(f))
+                except OSError, inst:
+                    if inst.errno != errno.ENOENT:
+                        raise
+        wlock = self.wlock()
+        try:
+            for f in list:
+                if unlink and os.path.exists(self.wjoin(f)):
+                    self.ui.warn(_("%s still exists!\n") % f)
+                elif self.dirstate[f] == 'a':
+                    self.dirstate.forget(f)
+                elif f not in self.dirstate:
+                    self.ui.warn(_("%s not tracked!\n") % f)
+                else:
+                    self.dirstate.remove(f)
+        finally:
+            wlock.release()
+
+    def undelete(self, list):
+        manifests = [self.manifest.read(self.changelog.read(p)[0])
+                     for p in self.dirstate.parents() if p != nullid]
+        wlock = self.wlock()
+        try:
+            for f in list:
+                if self.dirstate[f] != 'r':
+                    self.ui.warn(_("%s not removed!\n") % f)
+                else:
+                    m = f in manifests[0] and manifests[0] or manifests[1]
+                    t = self.file(f).read(m[f])
+                    self.wwrite(f, t, m.flags(f))
+                    self.dirstate.normal(f)
+        finally:
+            wlock.release()
+
+    def copy(self, source, dest):
+        p = self.wjoin(dest)
+        if not (os.path.exists(p) or os.path.islink(p)):
+            self.ui.warn(_("%s does not exist!\n") % dest)
+        elif not (os.path.isfile(p) or os.path.islink(p)):
+            self.ui.warn(_("copy failed: %s is not a file or a "
+                           "symbolic link\n") % dest)
+        else:
+            wlock = self.wlock()
+            try:
+                if self.dirstate[dest] in '?r':
+                    self.dirstate.add(dest)
+                self.dirstate.copy(source, dest)
+            finally:
+                wlock.release()
+
+    def heads(self, start=None):
+        heads = self.changelog.heads(start)
+        # sort the output in rev descending order
+        heads = [(-self.changelog.rev(h), h) for h in heads]
+        return [n for (r, n) in sorted(heads)]
+
+    def branchheads(self, branch=None, start=None, closed=False):
+        if branch is None:
+            branch = self[None].branch()
+        branches = self.branchmap()
+        if branch not in branches:
+            return []
+        bheads = branches[branch]
+        # the cache returns heads ordered lowest to highest
+        bheads.reverse()
+        if start is not None:
+            # filter out the heads that cannot be reached from startrev
+            bheads = self.changelog.nodesbetween([start], bheads)[2]
+        if not closed:
+            bheads = [h for h in bheads if
+                      ('close' not in self.changelog.read(h)[5])]
+        return bheads
+
+    def branches(self, nodes):
+        if not nodes:
+            nodes = [self.changelog.tip()]
+        b = []
+        for n in nodes:
+            t = n
+            while 1:
+                p = self.changelog.parents(n)
+                if p[1] != nullid or p[0] == nullid:
+                    b.append((t, n, p[0], p[1]))
+                    break
+                n = p[0]
+        return b
+
+    def between(self, pairs):
+        r = []
+
+        for top, bottom in pairs:
+            n, l, i = top, [], 0
+            f = 1
+
+            while n != bottom and n != nullid:
+                p = self.changelog.parents(n)[0]
+                if i == f:
+                    l.append(n)
+                    f = f * 2
+                n = p
+                i += 1
+
+            r.append(l)
+
+        return r
+
+    def findincoming(self, remote, base=None, heads=None, force=False):
+        """Return list of roots of the subsets of missing nodes from remote
+
+        If base dict is specified, assume that these nodes and their parents
+        exist on the remote side and that no child of a node of base exists
+        in both remote and self.
+        Furthermore base will be updated to include the nodes that exists
+        in self and remote but no children exists in self and remote.
+        If a list of heads is specified, return only nodes which are heads
+        or ancestors of these heads.
+
+        All the ancestors of base are in self and in remote.
+        All the descendants of the list returned are missing in self.
+        (and so we know that the rest of the nodes are missing in remote, see
+        outgoing)
+        """
+        return self.findcommonincoming(remote, base, heads, force)[1]
+
+    def findcommonincoming(self, remote, base=None, heads=None, force=False):
+        """Return a tuple (common, missing roots, heads) used to identify
+        missing nodes from remote.
+
+        If base dict is specified, assume that these nodes and their parents
+        exist on the remote side and that no child of a node of base exists
+        in both remote and self.
+        Furthermore base will be updated to include the nodes that exists
+        in self and remote but no children exists in self and remote.
+        If a list of heads is specified, return only nodes which are heads
+        or ancestors of these heads.
+
+        All the ancestors of base are in self and in remote.
+        """
+        m = self.changelog.nodemap
+        search = []
+        fetch = set()
+        seen = set()
+        seenbranch = set()
+        if base is None:
+            base = {}
+
+        if not heads:
+            heads = remote.heads()
+
+        if self.changelog.tip() == nullid:
+            base[nullid] = 1
+            if heads != [nullid]:
+                return [nullid], [nullid], list(heads)
+            return [nullid], [], []
+
+        # assume we're closer to the tip than the root
+        # and start by examining the heads
+        self.ui.status(_("searching for changes\n"))
+
+        unknown = []
+        for h in heads:
+            if h not in m:
+                unknown.append(h)
+            else:
+                base[h] = 1
+
+        heads = unknown
+        if not unknown:
+            return base.keys(), [], []
+
+        req = set(unknown)
+        reqcnt = 0
+
+        # search through remote branches
+        # a 'branch' here is a linear segment of history, with four parts:
+        # head, root, first parent, second parent
+        # (a branch always has two parents (or none) by definition)
+        unknown = remote.branches(unknown)
+        while unknown:
+            r = []
+            while unknown:
+                n = unknown.pop(0)
+                if n[0] in seen:
+                    continue
+
+                self.ui.debug(_("examining %s:%s\n")
+                              % (short(n[0]), short(n[1])))
+                if n[0] == nullid: # found the end of the branch
+                    pass
+                elif n in seenbranch:
+                    self.ui.debug(_("branch already found\n"))
+                    continue
+                elif n[1] and n[1] in m: # do we know the base?
+                    self.ui.debug(_("found incomplete branch %s:%s\n")
+                                  % (short(n[0]), short(n[1])))
+                    search.append(n[0:2]) # schedule branch range for scanning
+                    seenbranch.add(n)
+                else:
+                    if n[1] not in seen and n[1] not in fetch:
+                        if n[2] in m and n[3] in m:
+                            self.ui.debug(_("found new changeset %s\n") %
+                                          short(n[1]))
+                            fetch.add(n[1]) # earliest unknown
+                        for p in n[2:4]:
+                            if p in m:
+                                base[p] = 1 # latest known
+
+                    for p in n[2:4]:
+                        if p not in req and p not in m:
+                            r.append(p)
+                            req.add(p)
+                seen.add(n[0])
+
+            if r:
+                reqcnt += 1
+                self.ui.debug(_("request %d: %s\n") %
+                            (reqcnt, " ".join(map(short, r))))
+                for p in xrange(0, len(r), 10):
+                    for b in remote.branches(r[p:p+10]):
+                        self.ui.debug(_("received %s:%s\n") %
+                                      (short(b[0]), short(b[1])))
+                        unknown.append(b)
+
+        # do binary search on the branches we found
+        while search:
+            newsearch = []
+            reqcnt += 1
+            for n, l in zip(search, remote.between(search)):
+                l.append(n[1])
+                p = n[0]
+                f = 1
+                for i in l:
+                    self.ui.debug(_("narrowing %d:%d %s\n") % (f, len(l), short(i)))
+                    if i in m:
+                        if f <= 2:
+                            self.ui.debug(_("found new branch changeset %s\n") %
+                                              short(p))
+                            fetch.add(p)
+                            base[i] = 1
+                        else:
+                            self.ui.debug(_("narrowed branch search to %s:%s\n")
+                                          % (short(p), short(i)))
+                            newsearch.append((p, i))
+                        break
+                    p, f = i, f * 2
+                search = newsearch
+
+        # sanity check our fetch list
+        for f in fetch:
+            if f in m:
+                raise error.RepoError(_("already have changeset ")
+                                      + short(f[:4]))
+
+        if base.keys() == [nullid]:
+            if force:
+                self.ui.warn(_("warning: repository is unrelated\n"))
+            else:
+                raise util.Abort(_("repository is unrelated"))
+
+        self.ui.debug(_("found new changesets starting at ") +
+                     " ".join([short(f) for f in fetch]) + "\n")
+
+        self.ui.debug(_("%d total queries\n") % reqcnt)
+
+        return base.keys(), list(fetch), heads
+
+    def findoutgoing(self, remote, base=None, heads=None, force=False):
+        """Return list of nodes that are roots of subsets not in remote
+
+        If base dict is specified, assume that these nodes and their parents
+        exist on the remote side.
+        If a list of heads is specified, return only nodes which are heads
+        or ancestors of these heads, and return a second element which
+        contains all remote heads which get new children.
+        """
+        if base is None:
+            base = {}
+            self.findincoming(remote, base, heads, force=force)
+
+        self.ui.debug(_("common changesets up to ")
+                      + " ".join(map(short, base.keys())) + "\n")
+
+        remain = set(self.changelog.nodemap)
+
+        # prune everything remote has from the tree
+        remain.remove(nullid)
+        remove = base.keys()
+        while remove:
+            n = remove.pop(0)
+            if n in remain:
+                remain.remove(n)
+                for p in self.changelog.parents(n):
+                    remove.append(p)
+
+        # find every node whose parents have been pruned
+        subset = []
+        # find every remote head that will get new children
+        updated_heads = set()
+        for n in remain:
+            p1, p2 = self.changelog.parents(n)
+            if p1 not in remain and p2 not in remain:
+                subset.append(n)
+            if heads:
+                if p1 in heads:
+                    updated_heads.add(p1)
+                if p2 in heads:
+                    updated_heads.add(p2)
+
+        # this is the set of all roots we have to push
+        if heads:
+            return subset, list(updated_heads)
+        else:
+            return subset
+
+    def pull(self, remote, heads=None, force=False):
+        lock = self.lock()
+        try:
+            common, fetch, rheads = self.findcommonincoming(remote, heads=heads,
+                                                            force=force)
+            if fetch == [nullid]:
+                self.ui.status(_("requesting all changes\n"))
+
+            if not fetch:
+                self.ui.status(_("no changes found\n"))
+                return 0
+
+            if heads is None and remote.capable('changegroupsubset'):
+                heads = rheads
+
+            if heads is None:
+                cg = remote.changegroup(fetch, 'pull')
+            else:
+                if not remote.capable('changegroupsubset'):
+                    raise util.Abort(_("Partial pull cannot be done because "
+                                       "other repository doesn't support "
+                                       "changegroupsubset."))
+                cg = remote.changegroupsubset(fetch, heads, 'pull')
+            return self.addchangegroup(cg, 'pull', remote.url())
+        finally:
+            lock.release()
+
+    def push(self, remote, force=False, revs=None):
+        # there are two ways to push to remote repo:
+        #
+        # addchangegroup assumes local user can lock remote
+        # repo (local filesystem, old ssh servers).
+        #
+        # unbundle assumes local user cannot lock remote repo (new ssh
+        # servers, http servers).
+
+        if remote.capable('unbundle'):
+            return self.push_unbundle(remote, force, revs)
+        return self.push_addchangegroup(remote, force, revs)
+
+    def prepush(self, remote, force, revs):
+        common = {}
+        remote_heads = remote.heads()
+        inc = self.findincoming(remote, common, remote_heads, force=force)
+
+        update, updated_heads = self.findoutgoing(remote, common, remote_heads)
+        if revs is not None:
+            msng_cl, bases, heads = self.changelog.nodesbetween(update, revs)
+        else:
+            bases, heads = update, self.changelog.heads()
+
+        def checkbranch(lheads, rheads, updatelh):
+            '''
+            check whether there are more local heads than remote heads on
+            a specific branch.
+
+            lheads: local branch heads
+            rheads: remote branch heads
+            updatelh: outgoing local branch heads
+            '''
+
+            warn = 0
+
+            if not revs and len(lheads) > len(rheads):
+                warn = 1
+            else:
+                updatelheads = [self.changelog.heads(x, lheads)
+                                for x in updatelh]
+                newheads = set(sum(updatelheads, [])) & set(lheads)
+
+                if not newheads:
+                    return True
+
+                for r in rheads:
+                    if r in self.changelog.nodemap:
+                        desc = self.changelog.heads(r, heads)
+                        l = [h for h in heads if h in desc]
+                        if not l:
+                            newheads.add(r)
+                    else:
+                        newheads.add(r)
+                if len(newheads) > len(rheads):
+                    warn = 1
+
+            if warn:
+                if not rheads: # new branch requires --force
+                    self.ui.warn(_("abort: push creates new"
+                                   " remote branch '%s'!\n") %
+                                   self[updatelh[0]].branch())
+                else:
+                    self.ui.warn(_("abort: push creates new remote heads!\n"))
+
+                self.ui.status(_("(did you forget to merge?"
+                                 " use push -f to force)\n"))
+                return False
+            return True
+
+        if not bases:
+            self.ui.status(_("no changes found\n"))
+            return None, 1
+        elif not force:
+            # Check for each named branch if we're creating new remote heads.
+            # To be a remote head after push, node must be either:
+            # - unknown locally
+            # - a local outgoing head descended from update
+            # - a remote head that's known locally and not
+            #   ancestral to an outgoing head
+            #
+            # New named branches cannot be created without --force.
+
+            if remote_heads != [nullid]:
+                if remote.capable('branchmap'):
+                    localhds = {}
+                    if not revs:
+                        localhds = self.branchmap()
+                    else:
+                        for n in heads:
+                            branch = self[n].branch()
+                            if branch in localhds:
+                                localhds[branch].append(n)
+                            else:
+                                localhds[branch] = [n]
+
+                    remotehds = remote.branchmap()
+
+                    for lh in localhds:
+                        if lh in remotehds:
+                            rheads = remotehds[lh]
+                        else:
+                            rheads = []
+                        lheads = localhds[lh]
+                        updatelh = [upd for upd in update
+                                    if self[upd].branch() == lh]
+                        if not updatelh:
+                            continue
+                        if not checkbranch(lheads, rheads, updatelh):
+                            return None, 0
+                else:
+                    if not checkbranch(heads, remote_heads, update):
+                        return None, 0
+
+            if inc:
+                self.ui.warn(_("note: unsynced remote changes!\n"))
+
+
+        if revs is None:
+            # use the fast path, no race possible on push
+            cg = self._changegroup(common.keys(), 'push')
+        else:
+            cg = self.changegroupsubset(update, revs, 'push')
+        return cg, remote_heads
+
+    def push_addchangegroup(self, remote, force, revs):
+        lock = remote.lock()
+        try:
+            ret = self.prepush(remote, force, revs)
+            if ret[0] is not None:
+                cg, remote_heads = ret
+                return remote.addchangegroup(cg, 'push', self.url())
+            return ret[1]
+        finally:
+            lock.release()
+
+    def push_unbundle(self, remote, force, revs):
+        # local repo finds heads on server, finds out what revs it
+        # must push.  once revs transferred, if server finds it has
+        # different heads (someone else won commit/push race), server
+        # aborts.
+
+        ret = self.prepush(remote, force, revs)
+        if ret[0] is not None:
+            cg, remote_heads = ret
+            if force: remote_heads = ['force']
+            return remote.unbundle(cg, remote_heads, 'push')
+        return ret[1]
+
+    def changegroupinfo(self, nodes, source):
+        if self.ui.verbose or source == 'bundle':
+            self.ui.status(_("%d changesets found\n") % len(nodes))
+        if self.ui.debugflag:
+            self.ui.debug(_("list of changesets:\n"))
+            for node in nodes:
+                self.ui.debug("%s\n" % hex(node))
+
+    def changegroupsubset(self, bases, heads, source, extranodes=None):
+        """This function generates a changegroup consisting of all the nodes
+        that are descendents of any of the bases, and ancestors of any of
+        the heads.
+
+        It is fairly complex as determining which filenodes and which
+        manifest nodes need to be included for the changeset to be complete
+        is non-trivial.
+
+        Another wrinkle is doing the reverse, figuring out which changeset in
+        the changegroup a particular filenode or manifestnode belongs to.
+
+        The caller can specify some nodes that must be included in the
+        changegroup using the extranodes argument.  It should be a dict
+        where the keys are the filenames (or 1 for the manifest), and the
+        values are lists of (node, linknode) tuples, where node is a wanted
+        node and linknode is the changelog node that should be transmitted as
+        the linkrev.
+        """
+
+        if extranodes is None:
+            # can we go through the fast path ?
+            heads.sort()
+            allheads = self.heads()
+            allheads.sort()
+            if heads == allheads:
+                common = []
+                # parents of bases are known from both sides
+                for n in bases:
+                    for p in self.changelog.parents(n):
+                        if p != nullid:
+                            common.append(p)
+                return self._changegroup(common, source)
+
+        self.hook('preoutgoing', throw=True, source=source)
+
+        # Set up some initial variables
+        # Make it easy to refer to self.changelog
+        cl = self.changelog
+        # msng is short for missing - compute the list of changesets in this
+        # changegroup.
+        msng_cl_lst, bases, heads = cl.nodesbetween(bases, heads)
+        self.changegroupinfo(msng_cl_lst, source)
+        # Some bases may turn out to be superfluous, and some heads may be
+        # too.  nodesbetween will return the minimal set of bases and heads
+        # necessary to re-create the changegroup.
+
+        # Known heads are the list of heads that it is assumed the recipient
+        # of this changegroup will know about.
+        knownheads = set()
+        # We assume that all parents of bases are known heads.
+        for n in bases:
+            knownheads.update(cl.parents(n))
+        knownheads.discard(nullid)
+        knownheads = list(knownheads)
+        if knownheads:
+            # Now that we know what heads are known, we can compute which
+            # changesets are known.  The recipient must know about all
+            # changesets required to reach the known heads from the null
+            # changeset.
+            has_cl_set, junk, junk = cl.nodesbetween(None, knownheads)
+            junk = None
+            # Transform the list into a set.
+            has_cl_set = set(has_cl_set)
+        else:
+            # If there were no known heads, the recipient cannot be assumed to
+            # know about any changesets.
+            has_cl_set = set()
+
+        # Make it easy to refer to self.manifest
+        mnfst = self.manifest
+        # We don't know which manifests are missing yet
+        msng_mnfst_set = {}
+        # Nor do we know which filenodes are missing.
+        msng_filenode_set = {}
+
+        junk = mnfst.index[len(mnfst) - 1] # Get around a bug in lazyindex
+        junk = None
+
+        # A changeset always belongs to itself, so the changenode lookup
+        # function for a changenode is identity.
+        def identity(x):
+            return x
+
+        # A function generating function.  Sets up an environment for the
+        # inner function.
+        def cmp_by_rev_func(revlog):
+            # Compare two nodes by their revision number in the environment's
+            # revision history.  Since the revision number both represents the
+            # most efficient order to read the nodes in, and represents a
+            # topological sorting of the nodes, this function is often useful.
+            def cmp_by_rev(a, b):
+                return cmp(revlog.rev(a), revlog.rev(b))
+            return cmp_by_rev
+
+        # If we determine that a particular file or manifest node must be a
+        # node that the recipient of the changegroup will already have, we can
+        # also assume the recipient will have all the parents.  This function
+        # prunes them from the set of missing nodes.
+        def prune_parents(revlog, hasset, msngset):
+            haslst = list(hasset)
+            haslst.sort(cmp_by_rev_func(revlog))
+            for node in haslst:
+                parentlst = [p for p in revlog.parents(node) if p != nullid]
+                while parentlst:
+                    n = parentlst.pop()
+                    if n not in hasset:
+                        hasset.add(n)
+                        p = [p for p in revlog.parents(n) if p != nullid]
+                        parentlst.extend(p)
+            for n in hasset:
+                msngset.pop(n, None)
+
+        # This is a function generating function used to set up an environment
+        # for the inner function to execute in.
+        def manifest_and_file_collector(changedfileset):
+            # This is an information gathering function that gathers
+            # information from each changeset node that goes out as part of
+            # the changegroup.  The information gathered is a list of which
+            # manifest nodes are potentially required (the recipient may
+            # already have them) and total list of all files which were
+            # changed in any changeset in the changegroup.
+            #
+            # We also remember the first changenode we saw any manifest
+            # referenced by so we can later determine which changenode 'owns'
+            # the manifest.
+            def collect_manifests_and_files(clnode):
+                c = cl.read(clnode)
+                for f in c[3]:
+                    # This is to make sure we only have one instance of each
+                    # filename string for each filename.
+                    changedfileset.setdefault(f, f)
+                msng_mnfst_set.setdefault(c[0], clnode)
+            return collect_manifests_and_files
+
+        # Figure out which manifest nodes (of the ones we think might be part
+        # of the changegroup) the recipient must know about and remove them
+        # from the changegroup.
+        def prune_manifests():
+            has_mnfst_set = set()
+            for n in msng_mnfst_set:
+                # If a 'missing' manifest thinks it belongs to a changenode
+                # the recipient is assumed to have, obviously the recipient
+                # must have that manifest.
+                linknode = cl.node(mnfst.linkrev(mnfst.rev(n)))
+                if linknode in has_cl_set:
+                    has_mnfst_set.add(n)
+            prune_parents(mnfst, has_mnfst_set, msng_mnfst_set)
+
+        # Use the information collected in collect_manifests_and_files to say
+        # which changenode any manifestnode belongs to.
+        def lookup_manifest_link(mnfstnode):
+            return msng_mnfst_set[mnfstnode]
+
+        # A function generating function that sets up the initial environment
+        # the inner function.
+        def filenode_collector(changedfiles):
+            next_rev = [0]
+            # This gathers information from each manifestnode included in the
+            # changegroup about which filenodes the manifest node references
+            # so we can include those in the changegroup too.
+            #
+            # It also remembers which changenode each filenode belongs to.  It
+            # does this by assuming the a filenode belongs to the changenode
+            # the first manifest that references it belongs to.
+            def collect_msng_filenodes(mnfstnode):
+                r = mnfst.rev(mnfstnode)
+                if r == next_rev[0]:
+                    # If the last rev we looked at was the one just previous,
+                    # we only need to see a diff.
+                    deltamf = mnfst.readdelta(mnfstnode)
+                    # For each line in the delta
+                    for f, fnode in deltamf.iteritems():
+                        f = changedfiles.get(f, None)
+                        # And if the file is in the list of files we care
+                        # about.
+                        if f is not None:
+                            # Get the changenode this manifest belongs to
+                            clnode = msng_mnfst_set[mnfstnode]
+                            # Create the set of filenodes for the file if
+                            # there isn't one already.
+                            ndset = msng_filenode_set.setdefault(f, {})
+                            # And set the filenode's changelog node to the
+                            # manifest's if it hasn't been set already.
+                            ndset.setdefault(fnode, clnode)
+                else:
+                    # Otherwise we need a full manifest.
+                    m = mnfst.read(mnfstnode)
+                    # For every file in we care about.
+                    for f in changedfiles:
+                        fnode = m.get(f, None)
+                        # If it's in the manifest
+                        if fnode is not None:
+                            # See comments above.
+                            clnode = msng_mnfst_set[mnfstnode]
+                            ndset = msng_filenode_set.setdefault(f, {})
+                            ndset.setdefault(fnode, clnode)
+                # Remember the revision we hope to see next.
+                next_rev[0] = r + 1
+            return collect_msng_filenodes
+
+        # We have a list of filenodes we think we need for a file, lets remove
+        # all those we know the recipient must have.
+        def prune_filenodes(f, filerevlog):
+            msngset = msng_filenode_set[f]
+            hasset = set()
+            # If a 'missing' filenode thinks it belongs to a changenode we
+            # assume the recipient must have, then the recipient must have
+            # that filenode.
+            for n in msngset:
+                clnode = cl.node(filerevlog.linkrev(filerevlog.rev(n)))
+                if clnode in has_cl_set:
+                    hasset.add(n)
+            prune_parents(filerevlog, hasset, msngset)
+
+        # A function generator function that sets up the a context for the
+        # inner function.
+        def lookup_filenode_link_func(fname):
+            msngset = msng_filenode_set[fname]
+            # Lookup the changenode the filenode belongs to.
+            def lookup_filenode_link(fnode):
+                return msngset[fnode]
+            return lookup_filenode_link
+
+        # Add the nodes that were explicitly requested.
+        def add_extra_nodes(name, nodes):
+            if not extranodes or name not in extranodes:
+                return
+
+            for node, linknode in extranodes[name]:
+                if node not in nodes:
+                    nodes[node] = linknode
+
+        # Now that we have all theses utility functions to help out and
+        # logically divide up the task, generate the group.
+        def gengroup():
+            # The set of changed files starts empty.
+            changedfiles = {}
+            # Create a changenode group generator that will call our functions
+            # back to lookup the owning changenode and collect information.
+            group = cl.group(msng_cl_lst, identity,
+                             manifest_and_file_collector(changedfiles))
+            for chnk in group:
+                yield chnk
+
+            # The list of manifests has been collected by the generator
+            # calling our functions back.
+            prune_manifests()
+            add_extra_nodes(1, msng_mnfst_set)
+            msng_mnfst_lst = msng_mnfst_set.keys()
+            # Sort the manifestnodes by revision number.
+            msng_mnfst_lst.sort(cmp_by_rev_func(mnfst))
+            # Create a generator for the manifestnodes that calls our lookup
+            # and data collection functions back.
+            group = mnfst.group(msng_mnfst_lst, lookup_manifest_link,
+                                filenode_collector(changedfiles))
+            for chnk in group:
+                yield chnk
+
+            # These are no longer needed, dereference and toss the memory for
+            # them.
+            msng_mnfst_lst = None
+            msng_mnfst_set.clear()
+
+            if extranodes:
+                for fname in extranodes:
+                    if isinstance(fname, int):
+                        continue
+                    msng_filenode_set.setdefault(fname, {})
+                    changedfiles[fname] = 1
+            # Go through all our files in order sorted by name.
+            for fname in sorted(changedfiles):
+                filerevlog = self.file(fname)
+                if not len(filerevlog):
+                    raise util.Abort(_("empty or missing revlog for %s") % fname)
+                # Toss out the filenodes that the recipient isn't really
+                # missing.
+                if fname in msng_filenode_set:
+                    prune_filenodes(fname, filerevlog)
+                    add_extra_nodes(fname, msng_filenode_set[fname])
+                    msng_filenode_lst = msng_filenode_set[fname].keys()
+                else:
+                    msng_filenode_lst = []
+                # If any filenodes are left, generate the group for them,
+                # otherwise don't bother.
+                if len(msng_filenode_lst) > 0:
+                    yield changegroup.chunkheader(len(fname))
+                    yield fname
+                    # Sort the filenodes by their revision #
+                    msng_filenode_lst.sort(cmp_by_rev_func(filerevlog))
+                    # Create a group generator and only pass in a changenode
+                    # lookup function as we need to collect no information
+                    # from filenodes.
+                    group = filerevlog.group(msng_filenode_lst,
+                                             lookup_filenode_link_func(fname))
+                    for chnk in group:
+                        yield chnk
+                if fname in msng_filenode_set:
+                    # Don't need this anymore, toss it to free memory.
+                    del msng_filenode_set[fname]
+            # Signal that no more groups are left.
+            yield changegroup.closechunk()
+
+            if msng_cl_lst:
+                self.hook('outgoing', node=hex(msng_cl_lst[0]), source=source)
+
+        return util.chunkbuffer(gengroup())
+
+    def changegroup(self, basenodes, source):
+        # to avoid a race we use changegroupsubset() (issue1320)
+        return self.changegroupsubset(basenodes, self.heads(), source)
+
+    def _changegroup(self, common, source):
+        """Generate a changegroup of all nodes that we have that a recipient
+        doesn't.
+
+        This is much easier than the previous function as we can assume that
+        the recipient has any changenode we aren't sending them.
+
+        common is the set of common nodes between remote and self"""
+
+        self.hook('preoutgoing', throw=True, source=source)
+
+        cl = self.changelog
+        nodes = cl.findmissing(common)
+        revset = set([cl.rev(n) for n in nodes])
+        self.changegroupinfo(nodes, source)
+
+        def identity(x):
+            return x
+
+        def gennodelst(log):
+            for r in log:
+                if log.linkrev(r) in revset:
+                    yield log.node(r)
+
+        def changed_file_collector(changedfileset):
+            def collect_changed_files(clnode):
+                c = cl.read(clnode)
+                changedfileset.update(c[3])
+            return collect_changed_files
+
+        def lookuprevlink_func(revlog):
+            def lookuprevlink(n):
+                return cl.node(revlog.linkrev(revlog.rev(n)))
+            return lookuprevlink
+
+        def gengroup():
+            # construct a list of all changed files
+            changedfiles = set()
+
+            for chnk in cl.group(nodes, identity,
+                                 changed_file_collector(changedfiles)):
+                yield chnk
+
+            mnfst = self.manifest
+            nodeiter = gennodelst(mnfst)
+            for chnk in mnfst.group(nodeiter, lookuprevlink_func(mnfst)):
+                yield chnk
+
+            for fname in sorted(changedfiles):
+                filerevlog = self.file(fname)
+                if not len(filerevlog):
+                    raise util.Abort(_("empty or missing revlog for %s") % fname)
+                nodeiter = gennodelst(filerevlog)
+                nodeiter = list(nodeiter)
+                if nodeiter:
+                    yield changegroup.chunkheader(len(fname))
+                    yield fname
+                    lookup = lookuprevlink_func(filerevlog)
+                    for chnk in filerevlog.group(nodeiter, lookup):
+                        yield chnk
+
+            yield changegroup.closechunk()
+
+            if nodes:
+                self.hook('outgoing', node=hex(nodes[0]), source=source)
+
+        return util.chunkbuffer(gengroup())
+
+    def addchangegroup(self, source, srctype, url, emptyok=False):
+        """add changegroup to repo.
+
+        return values:
+        - nothing changed or no source: 0
+        - more heads than before: 1+added heads (2..n)
+        - less heads than before: -1-removed heads (-2..-n)
+        - number of heads stays the same: 1
+        """
+        def csmap(x):
+            self.ui.debug(_("add changeset %s\n") % short(x))
+            return len(cl)
+
+        def revmap(x):
+            return cl.rev(x)
+
+        if not source:
+            return 0
+
+        self.hook('prechangegroup', throw=True, source=srctype, url=url)
+
+        changesets = files = revisions = 0
+
+        # write changelog data to temp files so concurrent readers will not see
+        # inconsistent view
+        cl = self.changelog
+        cl.delayupdate()
+        oldheads = len(cl.heads())
+
+        tr = self.transaction()
+        try:
+            trp = weakref.proxy(tr)
+            # pull off the changeset group
+            self.ui.status(_("adding changesets\n"))
+            clstart = len(cl)
+            chunkiter = changegroup.chunkiter(source)
+            if cl.addgroup(chunkiter, csmap, trp) is None and not emptyok:
+                raise util.Abort(_("received changelog group is empty"))
+            clend = len(cl)
+            changesets = clend - clstart
+
+            # pull off the manifest group
+            self.ui.status(_("adding manifests\n"))
+            chunkiter = changegroup.chunkiter(source)
+            # no need to check for empty manifest group here:
+            # if the result of the merge of 1 and 2 is the same in 3 and 4,
+            # no new manifest will be created and the manifest group will
+            # be empty during the pull
+            self.manifest.addgroup(chunkiter, revmap, trp)
+
+            # process the files
+            self.ui.status(_("adding file changes\n"))
+            while 1:
+                f = changegroup.getchunk(source)
+                if not f:
+                    break
+                self.ui.debug(_("adding %s revisions\n") % f)
+                fl = self.file(f)
+                o = len(fl)
+                chunkiter = changegroup.chunkiter(source)
+                if fl.addgroup(chunkiter, revmap, trp) is None:
+                    raise util.Abort(_("received file revlog group is empty"))
+                revisions += len(fl) - o
+                files += 1
+
+            newheads = len(cl.heads())
+            heads = ""
+            if oldheads and newheads != oldheads:
+                heads = _(" (%+d heads)") % (newheads - oldheads)
+
+            self.ui.status(_("added %d changesets"
+                             " with %d changes to %d files%s\n")
+                             % (changesets, revisions, files, heads))
+
+            if changesets > 0:
+                p = lambda: cl.writepending() and self.root or ""
+                self.hook('pretxnchangegroup', throw=True,
+                          node=hex(cl.node(clstart)), source=srctype,
+                          url=url, pending=p)
+
+            # make changelog see real files again
+            cl.finalize(trp)
+
+            tr.close()
+        finally:
+            del tr
+
+        if changesets > 0:
+            # forcefully update the on-disk branch cache
+            self.ui.debug(_("updating the branch cache\n"))
+            self.branchtags()
+            self.hook("changegroup", node=hex(cl.node(clstart)),
+                      source=srctype, url=url)
+
+            for i in xrange(clstart, clend):
+                self.hook("incoming", node=hex(cl.node(i)),
+                          source=srctype, url=url)
+
+        # never return 0 here:
+        if newheads < oldheads:
+            return newheads - oldheads - 1
+        else:
+            return newheads - oldheads + 1
+
+
+    def stream_in(self, remote):
+        fp = remote.stream_out()
+        l = fp.readline()
+        try:
+            resp = int(l)
+        except ValueError:
+            raise error.ResponseError(
+                _('Unexpected response from remote server:'), l)
+        if resp == 1:
+            raise util.Abort(_('operation forbidden by server'))
+        elif resp == 2:
+            raise util.Abort(_('locking the remote repository failed'))
+        elif resp != 0:
+            raise util.Abort(_('the server sent an unknown error code'))
+        self.ui.status(_('streaming all changes\n'))
+        l = fp.readline()
+        try:
+            total_files, total_bytes = map(int, l.split(' ', 1))
+        except (ValueError, TypeError):
+            raise error.ResponseError(
+                _('Unexpected response from remote server:'), l)
+        self.ui.status(_('%d files to transfer, %s of data\n') %
+                       (total_files, util.bytecount(total_bytes)))
+        start = time.time()
+        for i in xrange(total_files):
+            # XXX doesn't support '\n' or '\r' in filenames
+            l = fp.readline()
+            try:
+                name, size = l.split('\0', 1)
+                size = int(size)
+            except (ValueError, TypeError):
+                raise error.ResponseError(
+                    _('Unexpected response from remote server:'), l)
+            self.ui.debug(_('adding %s (%s)\n') % (name, util.bytecount(size)))
+            # for backwards compat, name was partially encoded
+            ofp = self.sopener(store.decodedir(name), 'w')
+            for chunk in util.filechunkiter(fp, limit=size):
+                ofp.write(chunk)
+            ofp.close()
+        elapsed = time.time() - start
+        if elapsed <= 0:
+            elapsed = 0.001
+        self.ui.status(_('transferred %s in %.1f seconds (%s/sec)\n') %
+                       (util.bytecount(total_bytes), elapsed,
+                        util.bytecount(total_bytes / elapsed)))
+        self.invalidate()
+        return len(self.heads()) + 1
+
+    def clone(self, remote, heads=[], stream=False):
+        '''clone remote repository.
+
+        keyword arguments:
+        heads: list of revs to clone (forces use of pull)
+        stream: use streaming clone if possible'''
+
+        # now, all clients that can request uncompressed clones can
+        # read repo formats supported by all servers that can serve
+        # them.
+
+        # if revlog format changes, client will have to check version
+        # and format flags on "stream" capability, and use
+        # uncompressed only if compatible.
+
+        if stream and not heads and remote.capable('stream'):
+            return self.stream_in(remote)
+        return self.pull(remote, heads)
+
+# used to avoid circular references so destructors work
+def aftertrans(files):
+    renamefiles = [tuple(t) for t in files]
+    def a():
+        for src, dest in renamefiles:
+            util.rename(src, dest)
+    return a
+
+def instance(ui, path, create):
+    return localrepository(ui, util.drop_scheme('file', path), create)
+
+def islocal(path):
+    return True