def write(self, repo):
     try:
         f = repo.vfs(_filename(repo), "w", atomictemp=True)
         cachekey = [hex(self.tipnode), str(self.tiprev)]
         if self.filteredhash is not None:
             cachekey.append(hex(self.filteredhash))
         f.write(" ".join(cachekey) + '\n')
         nodecount = 0
         for label, nodes in sorted(self.iteritems()):
             for node in nodes:
                 nodecount += 1
                 if node in self._closednodes:
                     state = 'c'
                 else:
                     state = 'o'
                 f.write("%s %s %s\n" % (hex(node), state,
                                         encoding.fromlocal(label)))
         f.close()
         repo.ui.log('branchcache',
                     'wrote %s branch cache with %d labels and %d nodes\n',
                     repo.filtername, len(self), nodecount)
     except (IOError, OSError, util.Abort), inst:
         repo.ui.debug("couldn't write branch cache: %s\n" % inst)
         # Abort may be raise by read only opener
         pass

def _writetagcache(ui, repo, valid, cachetags):
    filename = _filename(repo)
    try:
        cachefile = repo.vfs(filename, 'w', atomictemp=True)
    except (OSError, IOError):
        return

    ui.log('tagscache', 'writing .hg/%s with %d tags\n',
           filename, len(cachetags))

    if valid[2]:
        cachefile.write('%d %s %s\n' % (valid[0], hex(valid[1]), hex(valid[2])))
    else:
        cachefile.write('%d %s\n' % (valid[0], hex(valid[1])))

    # Tag names in the cache are in UTF-8 -- which is the whole reason
    # we keep them in UTF-8 throughout this module.  If we converted
    # them local encoding on input, we would lose info writing them to
    # the cache.
    for (name, (node, hist)) in sorted(cachetags.iteritems()):
        for n in hist:
            cachefile.write("%s %s\n" % (hex(n), name))
        cachefile.write("%s %s\n" % (hex(node), name))

    try:
        cachefile.close()
    except (OSError, IOError):
        pass

    def single(rev, seqno, fp):
        ctx = repo[rev]
        node = ctx.node()
        parents = [p.node() for p in ctx.parents() if p]
        branch = ctx.branch()
        if switch_parent:
            parents.reverse()
        prev = (parents and parents[0]) or nullid

        if not fp:
            fp = cmdutil.make_file(repo, template, node, total=total,
                                   seqno=seqno, revwidth=revwidth,
                                   mode='ab')
        if fp != sys.stdout and hasattr(fp, 'name'):
            repo.ui.note("%s\n" % fp.name)

        fp.write("# HG changeset patch\n")
        fp.write("# User %s\n" % ctx.user())
        fp.write("# Date %d %d\n" % ctx.date())
        if branch and (branch != 'default'):
            fp.write("# Branch %s\n" % branch)
        fp.write("# Node ID %s\n" % hex(node))
        fp.write("# Parent  %s\n" % hex(prev))
        if len(parents) > 1:
            fp.write("# Parent  %s\n" % hex(parents[1]))
        fp.write(ctx.description().rstrip())
        fp.write("\n\n")

        for chunk in diff(repo, prev, node, opts=opts):
            fp.write(chunk)

 def commit(self):
     """Write current state on disk (if necessary)"""
     if self._dirty:
         records = []
         records.append(('L', hex(self._local)))
         records.append(('O', hex(self._other)))
         for d, v in self._state.iteritems():
             records.append(('F', '\0'.join([d] + v)))
         self._writerecords(records)
         self._dirty = False

 def write(self, repo):
     try:
         f = repo.opener(_filename(repo), "w", atomictemp=True)
         cachekey = [hex(self.tipnode), str(self.tiprev)]
         if self.filteredhash is not None:
             cachekey.append(hex(self.filteredhash))
         f.write(" ".join(cachekey) + '\n')
         for label, nodes in sorted(self.iteritems()):
             for node in nodes:
                 f.write("%s %s\n" % (hex(node), encoding.fromlocal(label)))
         f.close()
     except (IOError, OSError, util.Abort):
         # Abort may be raise by read only opener
         pass

    def add(self, manifest, files, desc, transaction, p1, p2,
                  user, date=None, extra={}):
        user = user.strip()
        # An empty username or a username with a "\n" will make the
        # revision text contain two "\n\n" sequences -> corrupt
        # repository since read cannot unpack the revision.
        if not user:
            raise error.RevlogError(_("empty username"))
        if "\n" in user:
            raise error.RevlogError(_("username %s contains a newline")
                                    % repr(user))

        # strip trailing whitespace and leading and trailing empty lines
        desc = '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n')

        user, desc = encoding.fromlocal(user), encoding.fromlocal(desc)

        if date:
            parseddate = "%d %d" % util.parsedate(date)
        else:
            parseddate = "%d %d" % util.makedate()
        if extra and extra.get("branch") in ("default", ""):
            del extra["branch"]
        if extra:
            extra = encodeextra(extra)
            parseddate = "%s %s" % (parseddate, extra)
        l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc]
        text = "\n".join(l)
        return self.addrevision(text, transaction, len(self), p1, p2)

    def edit(self, text, user, extra={}):
        (fd, name) = tempfile.mkstemp(prefix="hg-editor-", suffix=".txt",
                                      text=True)
        try:
            f = os.fdopen(fd, "w")
            f.write(text)
            f.close()

            environ = {'HGUSER': user}
            if 'transplant_source' in extra:
                environ.update({'HGREVISION': hex(extra['transplant_source'])})
            for label in ('source', 'rebase_source'):
                if label in extra:
                    environ.update({'HGREVISION': extra[label]})
                    break

            editor = self.geteditor()

            util.system("%s \"%s\"" % (editor, name),
                        environ=environ,
                        onerr=util.Abort, errprefix=_("edit failed"),
                        out=self.fout)

            f = open(name)
            t = f.read()
            f.close()
        finally:
            os.unlink(name)

        return t

 def checkhash(self, text, p1, p2, node, rev=None):
     if node != self.hash(text, p1, p2):
         revornode = rev
         if revornode is None:
             revornode = templatefilters.short(hex(node))
         raise RevlogError(_("integrity check failed on %s:%s")
             % (self.indexfile, revornode))

        def metadata():
            base = 'repo: %s\nnode: %s\nbranch: %s\n' % (
                hex(repo.changelog.node(0)), hex(node), ctx.branch())

            tags = ''.join('tag: %s\n' % t for t in ctx.tags()
                           if repo.tagtype(t) == 'global')
            if not tags:
                repo.ui.pushbuffer()
                opts = {'template': '{latesttag}\n{latesttagdistance}',
                        'style': '', 'patch': None, 'git': None}
                cmdutil.show_changeset(repo.ui, repo, opts).show(ctx)
                ltags, dist = repo.ui.popbuffer().split('\n')
                tags = ''.join('latesttag: %s\n' % t for t in ltags.split(':'))
                tags += 'latesttagdistance: %s\n' % dist

            return base + tags

def listphases(repo):
    """List phases root for serialisation over pushkey"""
    keys = {}
    value = '%i' % draft
    for root in repo._phaseroots[draft]:
        keys[hex(root)] = value

    if repo.ui.configbool('phases', 'publish', True):
        # Add an extra data to let remote know we are a publishing repo.
        # Publishing repo can't just pretend they are old repo. When pushing to
        # a publishing repo, the client still need to push phase boundary
        #
        # Push do not only push changeset. It also push phase data. New
        # phase data may apply to common changeset which won't be push (as they
        # are common).  Here is a very simple example:
        #
        # 1) repo A push changeset X as draft to repo B
        # 2) repo B make changeset X public
        # 3) repo B push to repo A. X is not pushed but the data that X as now
        #    public should
        #
        # The server can't handle it on it's own as it has no idea of client
        # phase data.
        keys['publishing'] = 'True'
    return keys

    def create(self, transaction, prec, succs=(), flag=0, parents=None,
               date=None, metadata=None):
        """obsolete: add a new obsolete marker

        * ensuring it is hashable
        * check mandatory metadata
        * encode metadata

        If you are a human writing code creating marker you want to use the
        `createmarkers` function in this module instead.

        return True if a new marker have been added, False if the markers
        already existed (no op).
        """
        if metadata is None:
            metadata = {}
        if date is None:
            if 'date' in metadata:
                # as a courtesy for out-of-tree extensions
                date = util.parsedate(metadata.pop('date'))
            else:
                date = util.makedate()
        if len(prec) != 20:
            raise ValueError(prec)
        for succ in succs:
            if len(succ) != 20:
                raise ValueError(succ)
        if prec in succs:
            raise ValueError(_('in-marker cycle with %s') % node.hex(prec))

        metadata = tuple(sorted(metadata.iteritems()))

        marker = (str(prec), tuple(succs), int(flag), metadata, date, parents)
        return bool(self.add(transaction, [marker]))

    def create(self, transaction, prec, succs=(), flag=0, metadata=None):
        """obsolete: add a new obsolete marker

        * ensuring it is hashable
        * check mandatory metadata
        * encode metadata

        If you are a human writing code creating marker you want to use the
        `createmarkers` function in this module instead.

        return True if a new marker have been added, False if the markers
        already existed (no op).
        """
        if metadata is None:
            metadata = {}
        if 'date' not in metadata:
            metadata['date'] = "%d %d" % util.makedate()
        if len(prec) != 20:
            raise ValueError(prec)
        for succ in succs:
            if len(succ) != 20:
                raise ValueError(succ)
        if prec in succs:
            raise ValueError(_('in-marker cycle with %s') % node.hex(prec))
        marker = (str(prec), tuple(succs), int(flag), encodemeta(metadata))
        return bool(self.add(transaction, [marker]))

def _changegroupinfo(repo, nodes, source):
    if repo.ui.verbose or source == 'bundle':
        repo.ui.status(_("%d changesets found\n") % len(nodes))
    if repo.ui.debugflag:
        repo.ui.debug("list of changesets:\n")
        for node in nodes:
            repo.ui.debug("%s\n" % hex(node))

    def _partialmatch(self, id):
        try:
            return self.index.partialmatch(id)
        except RevlogError:
            # parsers.c radix tree lookup gave multiple matches
            raise LookupError(id, self.indexfile, _("ambiguous identifier"))
        except (AttributeError, ValueError):
            # we are pure python, or key was too short to search radix tree
            pass

        if id in self._pcache:
            return self._pcache[id]

        if len(id) < 40:
            try:
                # hex(node)[:...]
                l = len(id) // 2  # grab an even number of digits
                prefix = bin(id[:l * 2])
                nl = [e[7] for e in self.index if e[7].startswith(prefix)]
                nl = [n for n in nl if hex(n).startswith(id)]
                if len(nl) > 0:
                    if len(nl) == 1:
                        self._pcache[id] = nl[0]
                        return nl[0]
                    raise LookupError(id, self.indexfile,
                                      _('ambiguous identifier'))
                return None
            except TypeError:
                pass

def lookup(repo, proto, key):
    try:
        r = hex(repo.lookup(key))
        success = 1
    except Exception, inst:
        r = str(inst)
        success = 0

def lookup(repo, proto, key):
    try:
        r = hex(repo.lookup(encoding.tolocal(key)))
        success = 1
    except Exception, inst:
        r = str(inst)
        success = 0

def listphases(repo):
    """List phases root for serialization over pushkey"""
    keys = {}
    value = "%i" % draft
    for root in repo._phasecache.phaseroots[draft]:
        keys[hex(root)] = value

    if repo.ui.configbool("phases", "publish", True):
        # Add an extra data to let remote know we are a publishing
        # repo. Publishing repo can't just pretend they are old repo.
        # When pushing to a publishing repo, the client still need to
        # push phase boundary
        #
        # Push do not only push changeset. It also push phase data.
        # New phase data may apply to common changeset which won't be
        # push (as they are common). Here is a very simple example:
        #
        # 1) repo A push changeset X as draft to repo B
        # 2) repo B make changeset X public
        # 3) repo B push to repo A. X is not pushed but the data that
        #    X as now public should
        #
        # The server can't handle it on it's own as it has no idea of
        # client phase data.
        keys["publishing"] = "True"
    return keys

 def rev(self, node):
     """filtered version of revlog.rev"""
     r = super(changelog, self).rev(node)
     if r in self.filteredrevs:
         raise error.FilteredLookupError(hex(node), self.indexfile,
                                         _('filtered node'))
     return r

    def add(self, fcl, fco, fca, fd):
        """add a new (potentially?) conflicting file the merge state
        fcl: file context for local,
        fco: file context for remote,
        fca: file context for ancestors,
        fd:  file path of the resulting merge.

        note: also write the local version to the `.hg/merge` directory.
        """
        hash = util.sha1(fcl.path()).hexdigest()
        self._repo.vfs.write('merge/' + hash, fcl.data())
        self._state[fd] = ['u', hash, fcl.path(),
                           fca.path(), hex(fca.filenode()),
                           fco.path(), hex(fco.filenode()),
                           fcl.flags()]
        self._dirty = True

 def commit(self):
     if self._dirty:
         f = self._repo.opener("merge/state", "w")
         f.write(hex(self._local) + "\n")
         for d, v in self._state.iteritems():
             f.write("\0".join([d] + v) + "\n")
         self._dirty = False