replace filehandle version of wwrite with wwritedata

hgext/extdiff.py

@@ -1,186 +1,187 b''
 # extdiff.py - external diff program support for mercurial
 #
 # Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 #
 # The `extdiff' Mercurial extension allows you to use external programs
 # to compare revisions, or revision with working dir.  The external diff
 # programs are called with a configurable set of options and two
 # non-option arguments: paths to directories containing snapshots of
 # files to compare.
 #
 # To enable this extension:
 #
 #   [extensions]
 #   hgext.extdiff =
 #
 # The `extdiff' extension also allows to configure new diff commands, so
 # you do not need to type "hg extdiff -p kdiff3" always.
 #
 #   [extdiff]
 #   # add new command that runs GNU diff(1) in 'context diff' mode
 #   cmd.cdiff = gdiff
 #   opts.cdiff = -Nprc5
 
 #   # add new command called vdiff, runs kdiff3
 #   cmd.vdiff = kdiff3
 
 #   # add new command called meld, runs meld (no need to name twice)
 #   cmd.meld =
 
 #   # add new command called vimdiff, runs gvimdiff with DirDiff plugin
 #   #(see http://www.vim.org/scripts/script.php?script_id=102)
 #   # Non english user, be sure to put "let g:DirDiffDynamicDiffText = 1" in
 #   # your .vimrc
 #   cmd.vimdiff = gvim
 #   opts.vimdiff = -f '+next' '+execute "DirDiff" argv(0) argv(1)'
 #
 # Each custom diff commands can have two parts: a `cmd' and an `opts'
 # part.  The cmd.xxx option defines the name of an executable program
 # that will be run, and opts.xxx defines a set of command-line options
 # which will be inserted to the command between the program name and
 # the files/directories to diff (i.e. the cdiff example above).
 #
 # You can use -I/-X and list of file or directory names like normal
 # "hg diff" command.  The `extdiff' extension makes snapshots of only
 # needed files, so running the external diff program will actually be
 # pretty fast (at least faster than having to compare the entire tree).
 
 from mercurial.i18n import _
 from mercurial.node import *
 from mercurial import cmdutil, util
 import os, shutil, tempfile
 
 def dodiff(ui, repo, diffcmd, diffopts, pats, opts):
     def snapshot_node(files, node):
         '''snapshot files as of some revision'''
         mf = repo.changectx(node).manifest()
         dirname = '%s.%s' % (os.path.basename(repo.root), short(node))
         base = os.path.join(tmproot, dirname)
         os.mkdir(base)
         if not ui.quiet:
             ui.write_err(_('making snapshot of %d files from rev %s\n') %
                          (len(files), short(node)))
         for fn in files:
             if not fn in mf:
                 # skipping new file after a merge ?
                 continue
             wfn = util.pconvert(fn)
             ui.note('  %s\n' % wfn)
             dest = os.path.join(base, wfn)
             destdir = os.path.dirname(dest)
             if not os.path.isdir(destdir):
                 os.makedirs(destdir)
-            repo.wwrite(wfn, repo.file(fn).read(mf[fn]), open(dest, 'w'))
+            data = repo.wwritedata(wfn, repo.file(wfn).read(mf[wfn]))
+            open(dest, 'w').write(data)
         return dirname
 
     def snapshot_wdir(files):
         '''snapshot files from working directory.
         if not using snapshot, -I/-X does not work and recursive diff
         in tools like kdiff3 and meld displays too many files.'''
         dirname = os.path.basename(repo.root)
         base = os.path.join(tmproot, dirname)
         os.mkdir(base)
         if not ui.quiet:
             ui.write_err(_('making snapshot of %d files from working dir\n') %
                          (len(files)))
         for fn in files:
             wfn = util.pconvert(fn)
             ui.note('  %s\n' % wfn)
             dest = os.path.join(base, wfn)
             destdir = os.path.dirname(dest)
             if not os.path.isdir(destdir):
                 os.makedirs(destdir)
             fp = open(dest, 'w')
             for chunk in util.filechunkiter(repo.wopener(wfn)):
                 fp.write(chunk)
         return dirname
 
     node1, node2 = cmdutil.revpair(repo, opts['rev'])
     files, matchfn, anypats = cmdutil.matchpats(repo, pats, opts)
     modified, added, removed, deleted, unknown = repo.status(
         node1, node2, files, match=matchfn)[:5]
     if not (modified or added or removed):
         return 0
 
     tmproot = tempfile.mkdtemp(prefix='extdiff.')
     try:
         dir1 = snapshot_node(modified + removed, node1)
         if node2:
             dir2 = snapshot_node(modified + added, node2)
         else:
             dir2 = snapshot_wdir(modified + added)
         cmdline = ('%s %s %s %s' %
                    (util.shellquote(diffcmd), ' '.join(diffopts),
                     util.shellquote(dir1), util.shellquote(dir2)))
         ui.debug('running %r in %s\n' % (cmdline, tmproot))
         util.system(cmdline, cwd=tmproot)
         return 1
     finally:
         ui.note(_('cleaning up temp directory\n'))
         shutil.rmtree(tmproot)
 
 def extdiff(ui, repo, *pats, **opts):
     '''use external program to diff repository (or selected files)
 
     Show differences between revisions for the specified files, using
     an external program.  The default program used is diff, with
     default options "-Npru".
 
     To select a different program, use the -p option.  The program
     will be passed the names of two directories to compare.  To pass
     additional options to the program, use the -o option.  These will
     be passed before the names of the directories to compare.
 
     When two revision arguments are given, then changes are
     shown between those revisions. If only one revision is
     specified then that revision is compared to the working
     directory, and, when no revisions are specified, the
     working directory files are compared to its parent.'''
     program = opts['program'] or 'diff'
     if opts['program']:
         option = opts['option']
     else:
         option = opts['option'] or ['-Npru']
     return dodiff(ui, repo, program, option, pats, opts)
 
 cmdtable = {
     "extdiff":
     (extdiff,
      [('p', 'program', '', _('comparison program to run')),
       ('o', 'option', [], _('pass option to comparison program')),
       ('r', 'rev', [], _('revision')),
       ('I', 'include', [], _('include names matching the given patterns')),
       ('X', 'exclude', [], _('exclude names matching the given patterns'))],
      _('hg extdiff [OPT]... [FILE]...')),
     }
 
 def uisetup(ui):
     for cmd, path in ui.configitems('extdiff'):
         if not cmd.startswith('cmd.'): continue
         cmd = cmd[4:]
         if not path: path = cmd
         diffopts = ui.config('extdiff', 'opts.' + cmd, '')
         diffopts = diffopts and [diffopts] or []
         def save(cmd, path, diffopts):
             '''use closure to save diff command to use'''
             def mydiff(ui, repo, *pats, **opts):
                 return dodiff(ui, repo, path, diffopts, pats, opts)
             mydiff.__doc__ = '''use %(path)r to diff repository (or selected files)
 
             Show differences between revisions for the specified
             files, using the %(path)r program.
 
             When two revision arguments are given, then changes are
             shown between those revisions. If only one revision is
             specified then that revision is compared to the working
             directory, and, when no revisions are specified, the
             working directory files are compared to its parent.''' % {
                 'path': path,
                 }
             return mydiff
         cmdtable[cmd] = (save(cmd, path, diffopts),
                          cmdtable['extdiff'][1][1:],
                          _('hg %s [OPT]... [FILE]...') % cmd)

mercurial/archival.py

@@ -1,172 +1,170 b''
 # archival.py - revision archival for mercurial
 #
 # Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms of
 # the GNU General Public License, incorporated herein by reference.
 
 from i18n import _
 from node import *
 import cStringIO, os, stat, tarfile, time, util, zipfile
 
 def tidyprefix(dest, prefix, suffixes):
     '''choose prefix to use for names in archive.  make sure prefix is
     safe for consumers.'''
 
     if prefix:
         prefix = prefix.replace('\\', '/')
     else:
         if not isinstance(dest, str):
             raise ValueError('dest must be string if no prefix')
         prefix = os.path.basename(dest)
         lower = prefix.lower()
         for sfx in suffixes:
             if lower.endswith(sfx):
                 prefix = prefix[:-len(sfx)]
                 break
     lpfx = os.path.normpath(util.localpath(prefix))
     prefix = util.pconvert(lpfx)
     if not prefix.endswith('/'):
         prefix += '/'
     if prefix.startswith('../') or os.path.isabs(lpfx) or '/../' in prefix:
         raise util.Abort(_('archive prefix contains illegal components'))
     return prefix
 
 class tarit:
     '''write archive to tar file or stream.  can write uncompressed,
     or compress with gzip or bzip2.'''
 
     def __init__(self, dest, prefix, mtime, kind=''):
         self.prefix = tidyprefix(dest, prefix, ['.tar', '.tar.bz2', '.tar.gz',
                                                 '.tgz', '.tbz2'])
         self.mtime = mtime
         if isinstance(dest, str):
             self.z = tarfile.open(dest, mode='w:'+kind)
         else:
             self.z = tarfile.open(mode='w|'+kind, fileobj=dest)
 
     def addfile(self, name, mode, data):
         i = tarfile.TarInfo(self.prefix + name)
         i.mtime = self.mtime
         i.size = len(data)
         i.mode = mode
         self.z.addfile(i, cStringIO.StringIO(data))
 
     def done(self):
         self.z.close()
 
 class tellable:
     '''provide tell method for zipfile.ZipFile when writing to http
     response file object.'''
 
     def __init__(self, fp):
         self.fp = fp
         self.offset = 0
 
     def __getattr__(self, key):
         return getattr(self.fp, key)
 
     def write(self, s):
         self.fp.write(s)
         self.offset += len(s)
 
     def tell(self):
         return self.offset
 
 class zipit:
     '''write archive to zip file or stream.  can write uncompressed,
     or compressed with deflate.'''
 
     def __init__(self, dest, prefix, mtime, compress=True):
         self.prefix = tidyprefix(dest, prefix, ('.zip',))
         if not isinstance(dest, str):
             try:
                 dest.tell()
             except (AttributeError, IOError):
                 dest = tellable(dest)
         self.z = zipfile.ZipFile(dest, 'w',
                                  compress and zipfile.ZIP_DEFLATED or
                                  zipfile.ZIP_STORED)
         self.date_time = time.gmtime(mtime)[:6]
 
     def addfile(self, name, mode, data):
         i = zipfile.ZipInfo(self.prefix + name, self.date_time)
         i.compress_type = self.z.compression
         i.flag_bits = 0x08
         # unzip will not honor unix file modes unless file creator is
         # set to unix (id 3).
         i.create_system = 3
         i.external_attr = (mode | stat.S_IFREG) << 16L
         self.z.writestr(i, data)
 
     def done(self):
         self.z.close()
 
 class fileit:
     '''write archive as files in directory.'''
 
     def __init__(self, name, prefix, mtime):
         if prefix:
             raise util.Abort(_('cannot give prefix when archiving to files'))
         self.basedir = name
         self.dirs = {}
         self.oflags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY |
                        getattr(os, 'O_BINARY', 0) |
                        getattr(os, 'O_NOFOLLOW', 0))
 
     def addfile(self, name, mode, data):
         destfile = os.path.join(self.basedir, name)
         destdir = os.path.dirname(destfile)
         if destdir not in self.dirs:
             if not os.path.isdir(destdir):
                 os.makedirs(destdir)
             self.dirs[destdir] = 1
         os.fdopen(os.open(destfile, self.oflags, mode), 'wb').write(data)
 
     def done(self):
         pass
 
 archivers = {
     'files': fileit,
     'tar': tarit,
     'tbz2': lambda name, prefix, mtime: tarit(name, prefix, mtime, 'bz2'),
     'tgz': lambda name, prefix, mtime: tarit(name, prefix, mtime, 'gz'),
     'uzip': lambda name, prefix, mtime: zipit(name, prefix, mtime, False),
     'zip': zipit,
     }
 
 def archive(repo, dest, node, kind, decode=True, matchfn=None,
             prefix=None, mtime=None):
     '''create archive of repo as it was at node.
 
     dest can be name of directory, name of archive file, or file
     object to write archive to.
 
     kind is type of archive to create.
 
     decode tells whether to put files through decode filters from
     hgrc.
 
     matchfn is function to filter names of files to write to archive.
 
     prefix is name of path to put before every archive member.'''
 
     def write(name, mode, data):
         if matchfn and not matchfn(name): return
         if decode:
-            fp = cStringIO.StringIO()
-            repo.wwrite(name, data, fp)
-            data = fp.getvalue()
+            data = repo.wwritedata(name, data)
         archiver.addfile(name, mode, data)
 
     ctx = repo.changectx(node)
     archiver = archivers[kind](dest, prefix, mtime or ctx.date()[0])
     m = ctx.manifest()
     items = m.items()
     items.sort()
     write('.hg_archival.txt', 0644,
           'repo: %s\nnode: %s\n' % (hex(repo.changelog.node(0)), hex(node)))
     for filename, filenode in items:
         write(filename, m.execf(filename) and 0755 or 0644,
               repo.file(filename).read(filenode))
     archiver.done()

mercurial/localrepo.py

@@ -1,1866 +1,1867 b''
 # localrepo.py - read/write repository class for mercurial
 #
 # Copyright 2005, 2006 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from node import *
 from i18n import _
 import repo, appendfile, changegroup
 import changelog, dirstate, filelog, manifest, context
 import re, lock, transaction, tempfile, stat, mdiff, errno, ui
 import os, revlog, time, util
 
 class localrepository(repo.repository):
     capabilities = ('lookup', 'changegroupsubset')
     supported = ('revlogv1', 'store')
 
     def __del__(self):
         self.transhandle = None
     def __init__(self, parentui, path=None, create=0):
         repo.repository.__init__(self)
         if not path:
             p = os.getcwd()
             while not os.path.isdir(os.path.join(p, ".hg")):
                 oldp = p
                 p = os.path.dirname(p)
                 if p == oldp:
                     raise repo.RepoError(_("There is no Mercurial repository"
                                            " here (.hg not found)"))
             path = p
 
         self.path = os.path.join(path, ".hg")
         self.root = os.path.realpath(path)
         self.origroot = path
         self.opener = util.opener(self.path)
         self.wopener = util.opener(self.root)
 
         if not os.path.isdir(self.path):
             if create:
                 if not os.path.exists(path):
                     os.mkdir(path)
                 os.mkdir(self.path)
                 os.mkdir(os.path.join(self.path, "store"))
                 requirements = ("revlogv1", "store")
                 reqfile = self.opener("requires", "w")
                 for r in requirements:
                     reqfile.write("%s\n" % r)
                 reqfile.close()
                 # 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'
                 )
             else:
                 raise repo.RepoError(_("repository %s not found") % path)
         elif create:
             raise repo.RepoError(_("repository %s already exists") % path)
         else:
             # find requirements
             try:
                 requirements = self.opener("requires").read().splitlines()
             except IOError, inst:
                 if inst.errno != errno.ENOENT:
                     raise
                 requirements = []
         # check them
         for r in requirements:
             if r not in self.supported:
                 raise repo.RepoError(_("requirement '%s' not supported") % r)
 
         # setup store
         if "store" in requirements:
             self.encodefn = util.encodefilename
             self.decodefn = util.decodefilename
             self.spath = os.path.join(self.path, "store")
         else:
             self.encodefn = lambda x: x
             self.decodefn = lambda x: x
             self.spath = self.path
         self.sopener = util.encodedopener(util.opener(self.spath), self.encodefn)
 
         self.ui = ui.ui(parentui=parentui)
         try:
             self.ui.readconfig(self.join("hgrc"), self.root)
         except IOError:
             pass
 
         v = self.ui.configrevlog()
         self.revlogversion = int(v.get('format', revlog.REVLOG_DEFAULT_FORMAT))
         self.revlogv1 = self.revlogversion != revlog.REVLOGV0
         fl = v.get('flags', None)
         flags = 0
         if fl != None:
             for x in fl.split():
                 flags |= revlog.flagstr(x)
         elif self.revlogv1:
             flags = revlog.REVLOG_DEFAULT_FLAGS
 
         v = self.revlogversion | flags
         self.manifest = manifest.manifest(self.sopener, v)
         self.changelog = changelog.changelog(self.sopener, v)
 
         fallback = self.ui.config('ui', 'fallbackencoding')
         if fallback:
             util._fallbackencoding = fallback
 
         # the changelog might not have the inline index flag
         # on.  If the format of the changelog is the same as found in
         # .hgrc, apply any flags found in the .hgrc as well.
         # Otherwise, just version from the changelog
         v = self.changelog.version
         if v == self.revlogversion:
             v |= flags
         self.revlogversion = v
 
         self.tagscache = None
         self.branchcache = None
         self.nodetagscache = None
         self.filterpats = {}
         self.transhandle = None
 
         self._link = lambda x: False
         if util.checklink(self.root):
             r = self.root # avoid circular reference in lambda
             self._link = lambda x: util.is_link(os.path.join(r, x))
 
         self.dirstate = dirstate.dirstate(self.opener, self.ui, self.root)
 
     def url(self):
         return 'file:' + self.root
 
     def hook(self, name, throw=False, **args):
         def callhook(hname, funcname):
             '''call python hook. hook is callable object, looked up as
             name in python module. if callable returns "true", hook
             fails, else passes. if hook raises exception, treated as
             hook failure. exception propagates if throw is "true".
 
             reason for "true" meaning "hook failed" is so that
             unmodified commands (e.g. mercurial.commands.update) can
             be run as hooks without wrappers to convert return values.'''
 
             self.ui.note(_("calling hook %s: %s\n") % (hname, funcname))
             d = funcname.rfind('.')
             if d == -1:
                 raise util.Abort(_('%s hook is invalid ("%s" not in a module)')
                                  % (hname, funcname))
             modname = funcname[:d]
             try:
                 obj = __import__(modname)
             except ImportError:
                 try:
                     # extensions are loaded with hgext_ prefix
                     obj = __import__("hgext_%s" % modname)
                 except ImportError:
                     raise util.Abort(_('%s hook is invalid '
                                        '(import of "%s" failed)') %
                                      (hname, modname))
             try:
                 for p in funcname.split('.')[1:]:
                     obj = getattr(obj, p)
             except AttributeError, err:
                 raise util.Abort(_('%s hook is invalid '
                                    '("%s" is not defined)') %
                                  (hname, funcname))
             if not callable(obj):
                 raise util.Abort(_('%s hook is invalid '
                                    '("%s" is not callable)') %
                                  (hname, funcname))
             try:
                 r = obj(ui=self.ui, repo=self, hooktype=name, **args)
             except (KeyboardInterrupt, util.SignalInterrupt):
                 raise
             except Exception, exc:
                 if isinstance(exc, util.Abort):
                     self.ui.warn(_('error: %s hook failed: %s\n') %
                                  (hname, exc.args[0]))
                 else:
                     self.ui.warn(_('error: %s hook raised an exception: '
                                    '%s\n') % (hname, exc))
                 if throw:
                     raise
                 self.ui.print_exc()
                 return True
             if r:
                 if throw:
                     raise util.Abort(_('%s hook failed') % hname)
                 self.ui.warn(_('warning: %s hook failed\n') % hname)
             return r
 
         def runhook(name, cmd):
             self.ui.note(_("running hook %s: %s\n") % (name, cmd))
             env = dict([('HG_' + k.upper(), v) for k, v in args.iteritems()])
             r = util.system(cmd, environ=env, cwd=self.root)
             if r:
                 desc, r = util.explain_exit(r)
                 if throw:
                     raise util.Abort(_('%s hook %s') % (name, desc))
                 self.ui.warn(_('warning: %s hook %s\n') % (name, desc))
             return r
 
         r = False
         hooks = [(hname, cmd) for hname, cmd in self.ui.configitems("hooks")
                  if hname.split(".", 1)[0] == name and cmd]
         hooks.sort()
         for hname, cmd in hooks:
             if cmd.startswith('python:'):
                 r = callhook(hname, cmd[7:].strip()) or r
             else:
                 r = runhook(hname, cmd) or r
         return r
 
     tag_disallowed = ':\r\n'
 
     def tag(self, name, node, message, local, user, date):
         '''tag a revision with a symbolic name.
 
         if local is True, the tag is stored in a per-repository file.
         otherwise, it is stored in the .hgtags file, and a new
         changeset is committed with the change.
 
         keyword arguments:
 
         local: whether to store tag 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 c in self.tag_disallowed:
             if c in name:
                 raise util.Abort(_('%r cannot be used in a tag name') % c)
 
         self.hook('pretag', throw=True, node=hex(node), tag=name, local=local)
 
         if local:
             # local tags are stored in the current charset
             self.opener('localtags', 'a').write('%s %s\n' % (hex(node), name))
             self.hook('tag', node=hex(node), tag=name, local=local)
             return
 
         for x in self.status()[:5]:
             if '.hgtags' in x:
                 raise util.Abort(_('working copy of .hgtags is changed '
                                    '(please commit .hgtags manually)'))
 
         # committed tags are stored in UTF-8
         line = '%s %s\n' % (hex(node), util.fromlocal(name))
         self.wfile('.hgtags', 'ab').write(line)
         if self.dirstate.state('.hgtags') == '?':
             self.add(['.hgtags'])
 
         self.commit(['.hgtags'], message, user, date)
         self.hook('tag', node=hex(node), tag=name, local=local)
 
     def tags(self):
         '''return a mapping of tag to node'''
         if not self.tagscache:
             self.tagscache = {}
 
             def parsetag(line, context):
                 if not line:
                     return
                 s = l.split(" ", 1)
                 if len(s) != 2:
                     self.ui.warn(_("%s: cannot parse entry\n") % context)
                     return
                 node, key = s
                 key = util.tolocal(key.strip()) # stored in UTF-8
                 try:
                     bin_n = bin(node)
                 except TypeError:
                     self.ui.warn(_("%s: node '%s' is not well formed\n") %
                                  (context, node))
                     return
                 if bin_n not in self.changelog.nodemap:
                     self.ui.warn(_("%s: tag '%s' refers to unknown node\n") %
                                  (context, key))
                     return
                 self.tagscache[key] = bin_n
 
             # read the tags file from each head, ending with the tip,
             # and add each tag found to the map, with "newer" ones
             # taking precedence
             f = None
             for rev, node, fnode in self._hgtagsnodes():
                 f = (f and f.filectx(fnode) or
                      self.filectx('.hgtags', fileid=fnode))
                 count = 0
                 for l in f.data().splitlines():
                     count += 1
                     parsetag(l, _("%s, line %d") % (str(f), count))
 
             try:
                 f = self.opener("localtags")
                 count = 0
                 for l in f:
                     # localtags are stored in the local character set
                     # while the internal tag table is stored in UTF-8
                     l = util.fromlocal(l)
                     count += 1
                     parsetag(l, _("localtags, line %d") % count)
             except IOError:
                 pass
 
             self.tagscache['tip'] = self.changelog.tip()
 
         return self.tagscache
 
     def _hgtagsnodes(self):
         heads = self.heads()
         heads.reverse()
         last = {}
         ret = []
         for node in heads:
             c = self.changectx(node)
             rev = c.rev()
             try:
                 fnode = c.filenode('.hgtags')
             except revlog.LookupError:
                 continue
             ret.append((rev, node, fnode))
             if fnode in last:
                 ret[last[fnode]] = None
             last[fnode] = len(ret) - 1
         return [item for item in ret if item]
 
     def tagslist(self):
         '''return a list of tags ordered by revision'''
         l = []
         for t, n in self.tags().items():
             try:
                 r = self.changelog.rev(n)
             except:
                 r = -2 # sort to the beginning of the list if unknown
             l.append((r, t, n))
         l.sort()
         return [(t, n) for r, t, n in l]
 
     def nodetags(self, node):
         '''return the tags associated with a node'''
         if not self.nodetagscache:
             self.nodetagscache = {}
             for t, n in self.tags().items():
                 self.nodetagscache.setdefault(n, []).append(t)
         return self.nodetagscache.get(node, [])
 
     def _branchtags(self):
         partial, last, lrev = self._readbranchcache()
 
         tiprev = self.changelog.count() - 1
         if lrev != tiprev:
             self._updatebranchcache(partial, lrev+1, tiprev+1)
             self._writebranchcache(partial, self.changelog.tip(), tiprev)
 
         return partial
 
     def branchtags(self):
         if self.branchcache is not None:
             return self.branchcache
 
         self.branchcache = {} # avoid recursion in changectx
         partial = self._branchtags()
 
         # the branch cache is stored on disk as UTF-8, but in the local
         # charset internally
         for k, v in partial.items():
             self.branchcache[util.tolocal(k)] = v
         return self.branchcache
 
     def _readbranchcache(self):
         partial = {}
         try:
             f = self.opener("branches.cache")
             lines = f.read().split('\n')
             f.close()
             last, lrev = lines.pop(0).rstrip().split(" ", 1)
             last, lrev = bin(last), int(lrev)
             if not (lrev < self.changelog.count() and
                     self.changelog.node(lrev) == last): # sanity check
                 # invalidate the cache
                 raise ValueError('Invalid branch cache: unknown tip')
             for l in lines:
                 if not l: continue
                 node, label = l.rstrip().split(" ", 1)
                 partial[label] = bin(node)
         except (KeyboardInterrupt, util.SignalInterrupt):
             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("branches.cache", "w")
             f.write("%s %s\n" % (hex(tip), tiprev))
             for label, node in branches.iteritems():
                 f.write("%s %s\n" % (hex(node), label))
         except IOError:
             pass
 
     def _updatebranchcache(self, partial, start, end):
         for r in xrange(start, end):
             c = self.changectx(r)
             b = c.branch()
             if b:
                 partial[b] = c.node()
 
     def lookup(self, key):
         if key == '.':
             key = self.dirstate.parents()[0]
             if key == nullid:
                 raise repo.RepoError(_("no revision checked out"))
         elif key == 'null':
             return nullid
         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
         raise repo.RepoError(_("unknown revision '%s'") % key)
 
     def dev(self):
         return os.lstat(self.path).st_dev
 
     def local(self):
         return True
 
     def join(self, f):
         return os.path.join(self.path, f)
 
     def sjoin(self, f):
         f = self.encodefn(f)
         return os.path.join(self.spath, f)
 
     def wjoin(self, f):
         return os.path.join(self.root, f)
 
     def file(self, f):
         if f[0] == '/':
             f = f[1:]
         return filelog.filelog(self.sopener, f, self.revlogversion)
 
     def changectx(self, changeid=None):
         return context.changectx(self, changeid)
 
     def workingctx(self):
         return context.workingctx(self)
 
     def parents(self, changeid=None):
         '''
         get list of changectxs for parents of changeid or working directory
         '''
         if changeid is None:
             pl = self.dirstate.parents()
         else:
             n = self.changelog.lookup(changeid)
             pl = self.changelog.parents(n)
         if pl[1] == nullid:
             return [self.changectx(pl[0])]
         return [self.changectx(pl[0]), self.changectx(pl[1])]
 
     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 wfile(self, f, mode='r'):
         return self.wopener(f, mode)
 
     def _filter(self, filter, filename, data):
         if filter not in self.filterpats:
             l = []
             for pat, cmd in self.ui.configitems(filter):
                 mf = util.matcher(self.root, "", [pat], [], [])[1]
                 l.append((mf, cmd))
             self.filterpats[filter] = l
 
         for mf, cmd in self.filterpats[filter]:
             if mf(filename):
                 self.ui.debug(_("filtering %s through %s\n") % (filename, cmd))
                 data = util.filter(data, cmd)
                 break
 
         return data
 
     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, fd=None):
+    def wwrite(self, filename, data):
         data = self._filter("decode", filename, data)
-        if fd:
-            return fd.write(data)
         return self.wopener(filename, 'w').write(data)
 
+    def wwritedata(self, filename, data):
+        return self._filter("decode", filename, data)
+
     def transaction(self):
         tr = self.transhandle
         if tr != None and tr.running():
             return tr.nest()
 
         # save dirstate for rollback
         try:
             ds = self.opener("dirstate").read()
         except IOError:
             ds = ""
         self.opener("journal.dirstate", "w").write(ds)
 
         renames = [(self.sjoin("journal"), self.sjoin("undo")),
                    (self.join("journal.dirstate"), self.join("undo.dirstate"))]
         tr = transaction.transaction(self.ui.warn, self.sopener,
                                        self.sjoin("journal"),
                                        aftertrans(renames))
         self.transhandle = tr
         return tr
 
     def recover(self):
         l = self.lock()
         if os.path.exists(self.sjoin("journal")):
             self.ui.status(_("rolling back interrupted transaction\n"))
             transaction.rollback(self.sopener, self.sjoin("journal"))
             self.reload()
             return True
         else:
             self.ui.warn(_("no interrupted transaction available\n"))
             return False
 
     def rollback(self, wlock=None):
         if not wlock:
             wlock = self.wlock()
         l = self.lock()
         if os.path.exists(self.sjoin("undo")):
             self.ui.status(_("rolling back last transaction\n"))
             transaction.rollback(self.sopener, self.sjoin("undo"))
             util.rename(self.join("undo.dirstate"), self.join("dirstate"))
             self.reload()
             self.wreload()
         else:
             self.ui.warn(_("no rollback information available\n"))
 
     def wreload(self):
         self.dirstate.read()
 
     def reload(self):
         self.changelog.load()
         self.manifest.load()
         self.tagscache = None
         self.nodetagscache = None
 
     def do_lock(self, lockname, wait, releasefn=None, acquirefn=None,
                 desc=None):
         try:
             l = lock.lock(lockname, 0, releasefn, desc=desc)
         except lock.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=1):
         return self.do_lock(self.sjoin("lock"), wait, acquirefn=self.reload,
                             desc=_('repository %s') % self.origroot)
 
     def wlock(self, wait=1):
         return self.do_lock(self.join("wlock"), wait, self.dirstate.write,
                             self.wreload,
                             desc=_('working directory of %s') % self.origroot)
 
     def filecommit(self, fn, manifest1, manifest2, linkrev, transaction, changelist):
         """
         commit an individual file as part of a larger transaction
         """
 
         t = self.wread(fn)
         fl = self.file(fn)
         fp1 = manifest1.get(fn, nullid)
         fp2 = manifest2.get(fn, nullid)
 
         meta = {}
         cp = self.dirstate.copied(fn)
         if cp:
             meta["copy"] = cp
             if not manifest2: # not a branch merge
                 meta["copyrev"] = hex(manifest1.get(cp, nullid))
                 fp2 = nullid
             elif fp2 != nullid: # copied on remote side
                 meta["copyrev"] = hex(manifest1.get(cp, nullid))
             elif fp1 != nullid: # copied on local side, reversed
                 meta["copyrev"] = hex(manifest2.get(cp))
                 fp2 = nullid
             else: # directory rename
                 meta["copyrev"] = hex(manifest1.get(cp, nullid))
             self.ui.debug(_(" %s: copy %s:%s\n") %
                           (fn, cp, meta["copyrev"]))
             fp1 = nullid
         elif fp2 != nullid:
             # is one parent an ancestor of the other?
             fpa = fl.ancestor(fp1, fp2)
             if fpa == fp1:
                 fp1, fp2 = fp2, nullid
             elif fpa == fp2:
                 fp2 = nullid
 
             # is the file unmodified from the parent? report existing entry
             if fp2 == nullid and not fl.cmp(fp1, t):
                 return fp1
 
         changelist.append(fn)
         return fl.add(t, meta, transaction, linkrev, fp1, fp2)
 
     def rawcommit(self, files, text, user, date, p1=None, p2=None, wlock=None, extra={}):
         if p1 is None:
             p1, p2 = self.dirstate.parents()
         return self.commit(files=files, text=text, user=user, date=date,
                            p1=p1, p2=p2, wlock=wlock, extra=extra)
 
     def commit(self, files=None, text="", user=None, date=None,
                match=util.always, force=False, lock=None, wlock=None,
                force_editor=False, p1=None, p2=None, extra={}):
 
         commit = []
         remove = []
         changed = []
         use_dirstate = (p1 is None) # not rawcommit
         extra = extra.copy()
 
         if use_dirstate:
             if files:
                 for f in files:
                     s = self.dirstate.state(f)
                     if s in 'nmai':
                         commit.append(f)
                     elif s == 'r':
                         remove.append(f)
                     else:
                         self.ui.warn(_("%s not tracked!\n") % f)
             else:
                 changes = self.status(match=match)[:5]
                 modified, added, removed, deleted, unknown = changes
                 commit = modified + added
                 remove = removed
         else:
             commit = files
 
         if use_dirstate:
             p1, p2 = self.dirstate.parents()
             update_dirstate = True
         else:
             p1, p2 = p1, p2 or nullid
             update_dirstate = (self.dirstate.parents()[0] == p1)
 
         c1 = self.changelog.read(p1)
         c2 = self.changelog.read(p2)
         m1 = self.manifest.read(c1[0]).copy()
         m2 = self.manifest.read(c2[0])
 
         if use_dirstate:
             branchname = self.workingctx().branch()
             try:
                 branchname = branchname.decode('UTF-8').encode('UTF-8')
             except UnicodeDecodeError:
                 raise util.Abort(_('branch name not in UTF-8!'))
         else:
             branchname = ""
 
         if use_dirstate:
             oldname = c1[5].get("branch", "") # stored in UTF-8
             if not commit and not remove and not force and p2 == nullid and \
                    branchname == oldname:
                 self.ui.status(_("nothing changed\n"))
                 return None
 
         xp1 = hex(p1)
         if p2 == nullid: xp2 = ''
         else: xp2 = hex(p2)
 
         self.hook("precommit", throw=True, parent1=xp1, parent2=xp2)
 
         if not wlock:
             wlock = self.wlock()
         if not lock:
             lock = self.lock()
         tr = self.transaction()
 
         # check in files
         new = {}
         linkrev = self.changelog.count()
         commit.sort()
         is_exec = util.execfunc(self.root, m1.execf)
         is_link = util.linkfunc(self.root, m1.linkf)
         for f in commit:
             self.ui.note(f + "\n")
             try:
                 new[f] = self.filecommit(f, m1, m2, linkrev, tr, changed)
                 m1.set(f, is_exec(f), is_link(f))
             except OSError:
                 if use_dirstate:
                     self.ui.warn(_("trouble committing %s!\n") % f)
                     raise
                 else:
                     remove.append(f)
 
         # update manifest
         m1.update(new)
         remove.sort()
         removed = []
 
         for f in remove:
             if f in m1:
                 del m1[f]
                 removed.append(f)
         mn = self.manifest.add(m1, tr, linkrev, c1[0], c2[0], (new, removed))
 
         # add changeset
         new = new.keys()
         new.sort()
 
         user = user or self.ui.username()
         if not text or force_editor:
             edittext = []
             if text:
                 edittext.append(text)
             edittext.append("")
             edittext.append("HG: user: %s" % user)
             if p2 != nullid:
                 edittext.append("HG: branch merge")
             edittext.extend(["HG: changed %s" % f for f in changed])
             edittext.extend(["HG: removed %s" % f for f in removed])
             if not changed and not remove:
                 edittext.append("HG: no files changed")
             edittext.append("")
             # run editor in the repository root
             olddir = os.getcwd()
             os.chdir(self.root)
             text = self.ui.edit("\n".join(edittext), user)
             os.chdir(olddir)
 
         lines = [line.rstrip() for line in text.rstrip().splitlines()]
         while lines and not lines[0]:
             del lines[0]
         if not lines:
             return None
         text = '\n'.join(lines)
         if branchname:
             extra["branch"] = branchname
         n = self.changelog.add(mn, changed + removed, text, tr, p1, p2,
                                user, date, extra)
         self.hook('pretxncommit', throw=True, node=hex(n), parent1=xp1,
                   parent2=xp2)
         tr.close()
 
         if use_dirstate or update_dirstate:
             self.dirstate.setparents(n)
             if use_dirstate:
                 self.dirstate.update(new, "n")
                 self.dirstate.forget(removed)
 
         self.hook("commit", node=hex(n), parent1=xp1, parent2=xp2)
         return n
 
     def walk(self, node=None, files=[], match=util.always, badmatch=None):
         '''
         walk recursively through the directory tree or a given
         changeset, finding all files matched by the match
         function
 
         results are yielded in a tuple (src, filename), where src
         is one of:
         'f' the file was found in the directory tree
         'm' the file was only in the dirstate and not in the tree
         'b' file was not found and matched badmatch
         '''
 
         if node:
             fdict = dict.fromkeys(files)
             for fn in self.manifest.read(self.changelog.read(node)[0]):
                 for ffn in fdict:
                     # match if the file is the exact name or a directory
                     if ffn == fn or fn.startswith("%s/" % ffn):
                         del fdict[ffn]
                         break
                 if match(fn):
                     yield 'm', fn
             for fn in fdict:
                 if badmatch and badmatch(fn):
                     if match(fn):
                         yield 'b', fn
                 else:
                     self.ui.warn(_('%s: No such file in rev %s\n') % (
                         util.pathto(self.getcwd(), fn), short(node)))
         else:
             for src, fn in self.dirstate.walk(files, match, badmatch=badmatch):
                 yield src, fn
 
     def status(self, node1=None, node2=None, files=[], match=util.always,
                 wlock=None, list_ignored=False, list_clean=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 fcmp(fn, mf):
             t1 = self.wread(fn)
             return self.file(fn).cmp(mf.get(fn, nullid), t1)
 
         def mfmatches(node):
             change = self.changelog.read(node)
             mf = self.manifest.read(change[0]).copy()
             for fn in mf.keys():
                 if not match(fn):
                     del mf[fn]
             return mf
 
         modified, added, removed, deleted, unknown = [], [], [], [], []
         ignored, clean = [], []
 
         compareworking = False
         if not node1 or (not node2 and node1 == self.dirstate.parents()[0]):
             compareworking = True
 
         if not compareworking:
             # read the manifest from node1 before the manifest from node2,
             # so that we'll hit the manifest cache if we're going through
             # all the revisions in parent->child order.
             mf1 = mfmatches(node1)
 
         # are we comparing the working directory?
         if not node2:
             if not wlock:
                 try:
                     wlock = self.wlock(wait=0)
                 except lock.LockException:
                     wlock = None
             (lookup, modified, added, removed, deleted, unknown,
              ignored, clean) = self.dirstate.status(files, match,
                                                     list_ignored, list_clean)
 
             # are we comparing working dir against its parent?
             if compareworking:
                 if lookup:
                     # do a full compare of any files that might have changed
                     mf2 = mfmatches(self.dirstate.parents()[0])
                     for f in lookup:
                         if fcmp(f, mf2):
                             modified.append(f)
                         else:
                             clean.append(f)
                             if wlock is not None:
                                 self.dirstate.update([f], "n")
             else:
                 # we are comparing working dir against non-parent
                 # generate a pseudo-manifest for the working dir
                 # XXX: create it in dirstate.py ?
                 mf2 = mfmatches(self.dirstate.parents()[0])
                 is_exec = util.execfunc(self.root, mf2.execf)
                 is_link = util.linkfunc(self.root, mf2.linkf)
                 for f in lookup + modified + added:
                     mf2[f] = ""
                     mf2.set(f, is_exec(f), is_link(f))
                 for f in removed:
                     if f in mf2:
                         del mf2[f]
         else:
             # we are comparing two revisions
             mf2 = mfmatches(node2)
 
         if not compareworking:
             # flush lists from dirstate before comparing manifests
             modified, added, clean = [], [], []
 
             # make sure to sort the files so we talk to the disk in a
             # reasonable order
             mf2keys = mf2.keys()
             mf2keys.sort()
             for fn in mf2keys:
                 if mf1.has_key(fn):
                     if mf1.flags(fn) != mf2.flags(fn) or \
                        (mf1[fn] != mf2[fn] and (mf2[fn] != "" or fcmp(fn, mf1))):
                         modified.append(fn)
                     elif list_clean:
                         clean.append(fn)
                     del mf1[fn]
                 else:
                     added.append(fn)
 
             removed = mf1.keys()
 
         # sort and return results:
         for l in modified, added, removed, deleted, unknown, ignored, clean:
             l.sort()
         return (modified, added, removed, deleted, unknown, ignored, clean)
 
     def add(self, list, wlock=None):
         if not wlock:
             wlock = self.wlock()
         for f in list:
             p = self.wjoin(f)
             if not os.path.exists(p):
                 self.ui.warn(_("%s does not exist!\n") % f)
             elif not os.path.isfile(p):
                 self.ui.warn(_("%s not added: only files supported currently\n")
                              % f)
             elif self.dirstate.state(f) in 'an':
                 self.ui.warn(_("%s already tracked!\n") % f)
             else:
                 self.dirstate.update([f], "a")
 
     def forget(self, list, wlock=None):
         if not wlock:
             wlock = self.wlock()
         for f in list:
             if self.dirstate.state(f) not in 'ai':
                 self.ui.warn(_("%s not added!\n") % f)
             else:
                 self.dirstate.forget([f])
 
     def remove(self, list, unlink=False, wlock=None):
         if unlink:
             for f in list:
                 try:
                     util.unlink(self.wjoin(f))
                 except OSError, inst:
                     if inst.errno != errno.ENOENT:
                         raise
         if not wlock:
             wlock = self.wlock()
         for f in list:
             p = self.wjoin(f)
             if os.path.exists(p):
                 self.ui.warn(_("%s still exists!\n") % f)
             elif self.dirstate.state(f) == 'a':
                 self.dirstate.forget([f])
             elif f not in self.dirstate:
                 self.ui.warn(_("%s not tracked!\n") % f)
             else:
                 self.dirstate.update([f], "r")
 
     def undelete(self, list, wlock=None):
         p = self.dirstate.parents()[0]
         mn = self.changelog.read(p)[0]
         m = self.manifest.read(mn)
         if not wlock:
             wlock = self.wlock()
         for f in list:
             if self.dirstate.state(f) not in  "r":
                 self.ui.warn("%s not removed!\n" % f)
             else:
                 t = self.file(f).read(m[f])
                 self.wwrite(f, t)
                 util.set_exec(self.wjoin(f), m.execf(f))
                 self.dirstate.update([f], "n")
 
     def copy(self, source, dest, wlock=None):
         p = self.wjoin(dest)
         if not os.path.exists(p):
             self.ui.warn(_("%s does not exist!\n") % dest)
         elif not os.path.isfile(p):
             self.ui.warn(_("copy failed: %s is not a file\n") % dest)
         else:
             if not wlock:
                 wlock = self.wlock()
             if self.dirstate.state(dest) == '?':
                 self.dirstate.update([dest], "a")
             self.dirstate.copy(source, dest)
 
     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]
         heads.sort()
         return [n for (r, n) in heads]
 
     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:
                 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)
         """
         m = self.changelog.nodemap
         search = []
         fetch = {}
         seen = {}
         seenbranch = {}
         if base == None:
             base = {}
 
         if not heads:
             heads = remote.heads()
 
         if self.changelog.tip() == nullid:
             base[nullid] = 1
             if heads != [nullid]:
                 return [nullid]
             return []
 
         # 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
 
         if not unknown:
             return []
 
         req = dict.fromkeys(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) # schedule branch range for scanning
                     seenbranch[n] = 1
                 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[n[1]] = 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[p] = 1
                 seen[n[0]] = 1
 
             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:
             n = search.pop(0)
             reqcnt += 1
             l = remote.between([(n[0], n[1])])[0]
             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[p] = 1
                         base[i] = 1
                     else:
                         self.ui.debug(_("narrowed branch search to %s:%s\n")
                                       % (short(p), short(i)))
                         search.append((p, i))
                     break
                 p, f = i, f * 2
 
         # sanity check our fetch list
         for f in fetch.keys():
             if f in m:
                 raise repo.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 fetch.keys()
 
     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 == None:
             base = {}
             self.findincoming(remote, base, heads, force=force)
 
         self.ui.debug(_("common changesets up to ")
                       + " ".join(map(short, base.keys())) + "\n")
 
         remain = dict.fromkeys(self.changelog.nodemap)
 
         # prune everything remote has from the tree
         del remain[nullid]
         remove = base.keys()
         while remove:
             n = remove.pop(0)
             if n in remain:
                 del remain[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 = {}
         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[p1] = True
                 if p2 in heads:
                     updated_heads[p2] = True
 
         # this is the set of all roots we have to push
         if heads:
             return subset, updated_heads.keys()
         else:
             return subset
 
     def pull(self, remote, heads=None, force=False, lock=None):
         mylock = False
         if not lock:
             lock = self.lock()
             mylock = True
 
         try:
             fetch = self.findincoming(remote, 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:
                 cg = remote.changegroup(fetch, 'pull')
             else:
                 if 'changegroupsubset' not in remote.capabilities:
                     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:
             if mylock:
                 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):
         base = {}
         remote_heads = remote.heads()
         inc = self.findincoming(remote, base, remote_heads, force=force)
 
         update, updated_heads = self.findoutgoing(remote, base, remote_heads)
         if revs is not None:
             msng_cl, bases, heads = self.changelog.nodesbetween(update, revs)
         else:
             bases, heads = update, self.changelog.heads()
 
         if not bases:
             self.ui.status(_("no changes found\n"))
             return None, 1
         elif not force:
             # check 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
 
             warn = 0
 
             if remote_heads == [nullid]:
                 warn = 0
             elif not revs and len(heads) > len(remote_heads):
                 warn = 1
             else:
                 newheads = list(heads)
                 for r in remote_heads:
                     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.append(r)
                     else:
                         newheads.append(r)
                 if len(newheads) > len(remote_heads):
                     warn = 1
 
             if warn:
                 self.ui.warn(_("abort: push creates new remote branches!\n"))
                 self.ui.status(_("(did you forget to merge?"
                                  " use push -f to force)\n"))
                 return None, 1
             elif inc:
                 self.ui.warn(_("note: unsynced remote changes!\n"))
 
 
         if revs is None:
             cg = self.changegroup(update, 'push')
         else:
             cg = self.changegroupsubset(update, revs, 'push')
         return cg, remote_heads
 
     def push_addchangegroup(self, remote, force, revs):
         lock = remote.lock()
 
         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]
 
     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):
         self.ui.note(_("%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):
         """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."""
 
         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)
         # 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 = {}
         # We assume that all parents of bases are known heads.
         for n in bases:
             for p in cl.parents(n):
                 if p != nullid:
                     knownheads[p] = 1
         knownheads = knownheads.keys()
         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 an ersatz set.
             has_cl_set = dict.fromkeys(has_cl_set)
         else:
             # If there were no known heads, the recipient cannot be assumed to
             # know about any changesets.
             has_cl_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[mnfst.count() - 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 = hasset.keys()
             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[n] = 1
                         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 = {}
             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(n))
                 if linknode in has_cl_set:
                     has_mnfst_set[n] = 1
             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.
                     delta = mdiff.patchtext(mnfst.delta(mnfstnode))
                     # For each line in the delta
                     for dline in delta.splitlines():
                         # get the filename and filenode for that line
                         f, fnode = dline.split('\0')
                         fnode = bin(fnode[:40])
                         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 now the recipient must have.
         def prune_filenodes(f, filerevlog):
             msngset = msng_filenode_set[f]
             hasset = {}
             # 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(n))
                 if clnode in has_cl_set:
                     hasset[n] = 1
             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
 
         # 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()
             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()
 
             changedfiles = changedfiles.keys()
             changedfiles.sort()
             # Go through all our files in order sorted by name.
             for fname in changedfiles:
                 filerevlog = self.file(fname)
                 # Toss out the filenodes that the recipient isn't really
                 # missing.
                 if msng_filenode_set.has_key(fname):
                     prune_filenodes(fname, filerevlog)
                     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.genchunk(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 msng_filenode_set.has_key(fname):
                     # 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):
         """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."""
 
         self.hook('preoutgoing', throw=True, source=source)
 
         cl = self.changelog
         nodes = cl.nodesbetween(basenodes, None)[0]
         revset = dict.fromkeys([cl.rev(n) for n in nodes])
         self.changegroupinfo(nodes)
 
         def identity(x):
             return x
 
         def gennodelst(revlog):
             for r in xrange(0, revlog.count()):
                 n = revlog.node(r)
                 if revlog.linkrev(n) in revset:
                     yield n
 
         def changed_file_collector(changedfileset):
             def collect_changed_files(clnode):
                 c = cl.read(clnode)
                 for fname in c[3]:
                     changedfileset[fname] = 1
             return collect_changed_files
 
         def lookuprevlink_func(revlog):
             def lookuprevlink(n):
                 return cl.node(revlog.linkrev(n))
             return lookuprevlink
 
         def gengroup():
             # construct a list of all changed files
             changedfiles = {}
 
             for chnk in cl.group(nodes, identity,
                                  changed_file_collector(changedfiles)):
                 yield chnk
             changedfiles = changedfiles.keys()
             changedfiles.sort()
 
             mnfst = self.manifest
             nodeiter = gennodelst(mnfst)
             for chnk in mnfst.group(nodeiter, lookuprevlink_func(mnfst)):
                 yield chnk
 
             for fname in changedfiles:
                 filerevlog = self.file(fname)
                 nodeiter = gennodelst(filerevlog)
                 nodeiter = list(nodeiter)
                 if nodeiter:
                     yield changegroup.genchunk(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):
         """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 cl.count()
 
         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
 
         tr = self.transaction()
 
         # write changelog data to temp files so concurrent readers will not see
         # inconsistent view
         cl = None
         try:
             cl = appendfile.appendchangelog(self.sopener,
                                             self.changelog.version)
 
             oldheads = len(cl.heads())
 
             # pull off the changeset group
             self.ui.status(_("adding changesets\n"))
             cor = cl.count() - 1
             chunkiter = changegroup.chunkiter(source)
             if cl.addgroup(chunkiter, csmap, tr, 1) is None:
                 raise util.Abort(_("received changelog group is empty"))
             cnr = cl.count() - 1
             changesets = cnr - cor
 
             # 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, tr)
 
             # 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 = fl.count()
                 chunkiter = changegroup.chunkiter(source)
                 if fl.addgroup(chunkiter, revmap, tr) is None:
                     raise util.Abort(_("received file revlog group is empty"))
                 revisions += fl.count() - o
                 files += 1
 
             cl.writedata()
         finally:
             if cl:
                 cl.cleanup()
 
         # make changelog see real files again
         self.changelog = changelog.changelog(self.sopener,
                                              self.changelog.version)
         self.changelog.checkinlinesize(tr)
 
         newheads = len(self.changelog.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:
             self.hook('pretxnchangegroup', throw=True,
                       node=hex(self.changelog.node(cor+1)), source=srctype,
                       url=url)
 
         tr.close()
 
         if changesets > 0:
             self.hook("changegroup", node=hex(self.changelog.node(cor+1)),
                       source=srctype, url=url)
 
             for i in xrange(cor + 1, cnr + 1):
                 self.hook("incoming", node=hex(self.changelog.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 util.UnexpectedOutput(
                 _('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 util.UnexpectedOutput(
                 _('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 util.UnexpectedOutput(
                     _('Unexpected response from remote server:'), l)
             self.ui.debug('adding %s (%s)\n' % (name, util.bytecount(size)))
             ofp = self.sopener(name, 'w')
             for chunk in util.filechunkiter(fp, limit=size):
                 ofp.write(chunk)
             ofp.close()
         elapsed = time.time() - start
         self.ui.status(_('transferred %s in %.1f seconds (%s/sec)\n') %
                        (util.bytecount(total_bytes), elapsed,
                         util.bytecount(total_bytes / elapsed)))
         self.reload()
         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

mercurial/merge.py

@@ -1,497 +1,498 b''
 # merge.py - directory-level update/merge handling for Mercurial
 #
 # Copyright 2006 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from node import *
 from i18n import _
 import errno, util, os, tempfile
 
 def filemerge(repo, fw, fo, wctx, mctx):
     """perform a 3-way merge in the working directory
 
     fw = filename in the working directory
     fo = filename in other parent
     wctx, mctx = working and merge changecontexts
     """
 
     def temp(prefix, ctx):
         pre = "%s~%s." % (os.path.basename(ctx.path()), prefix)
         (fd, name) = tempfile.mkstemp(prefix=pre)
+        data = repo.wwritedata(ctx.path(), ctx.data())
         f = os.fdopen(fd, "wb")
-        repo.wwrite(ctx.path(), ctx.data(), f)
+        f.write(data)
         f.close()
         return name
 
     fcm = wctx.filectx(fw)
     fco = mctx.filectx(fo)
 
     if not fco.cmp(fcm.data()): # files identical?
         return None
 
     fca = fcm.ancestor(fco)
     if not fca:
         fca = repo.filectx(fw, fileid=nullrev)
     a = repo.wjoin(fw)
     b = temp("base", fca)
     c = temp("other", fco)
 
     if fw != fo:
         repo.ui.status(_("merging %s and %s\n") % (fw, fo))
     else:
         repo.ui.status(_("merging %s\n") % fw)
 
     repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcm, fco, fca))
 
     cmd = (os.environ.get("HGMERGE") or repo.ui.config("ui", "merge")
            or "hgmerge")
     r = util.system('%s "%s" "%s" "%s"' % (cmd, a, b, c), cwd=repo.root,
                     environ={'HG_FILE': fw,
                              'HG_MY_NODE': str(wctx.parents()[0]),
                              'HG_OTHER_NODE': str(mctx)})
     if r:
         repo.ui.warn(_("merging %s failed!\n") % fw)
 
     os.unlink(b)
     os.unlink(c)
     return r
 
 def checkunknown(wctx, mctx):
     "check for collisions between unknown files and files in mctx"
     man = mctx.manifest()
     for f in wctx.unknown():
         if f in man:
             if mctx.filectx(f).cmp(wctx.filectx(f).data()):
                 raise util.Abort(_("untracked local file '%s' differs"\
                                    " from remote version") % f)
 
 def checkcollision(mctx):
     "check for case folding collisions in the destination context"
     folded = {}
     for fn in mctx.manifest():
         fold = fn.lower()
         if fold in folded:
             raise util.Abort(_("case-folding collision between %s and %s")
                              % (fn, folded[fold]))
         folded[fold] = fn
 
 def forgetremoved(wctx, mctx):
     """
     Forget removed files
 
     If we're jumping between revisions (as opposed to merging), and if
     neither the working directory nor the target rev has the file,
     then we need to remove it from the dirstate, to prevent the
     dirstate from listing the file when it is no longer in the
     manifest.
     """
 
     action = []
     man = mctx.manifest()
     for f in wctx.deleted() + wctx.removed():
         if f not in man:
             action.append((f, "f"))
 
     return action
 
 def findcopies(repo, m1, m2, ma, limit):
     """
     Find moves and copies between m1 and m2 back to limit linkrev
     """
 
     def findold(fctx):
         "find files that path was copied from, back to linkrev limit"
         old = {}
         orig = fctx.path()
         visit = [fctx]
         while visit:
             fc = visit.pop()
             if fc.path() != orig and fc.path() not in old:
                 old[fc.path()] = 1
             if fc.rev() < limit:
                 continue
             visit += fc.parents()
 
         old = old.keys()
         old.sort()
         return old
 
     def nonoverlap(d1, d2, d3):
         "Return list of elements in d1 not in d2 or d3"
         l = [d for d in d1 if d not in d3 and d not in d2]
         l.sort()
         return l
 
     def checkcopies(c, man):
         '''check possible copies for filectx c'''
         for of in findold(c):
             if of not in man:
                 return
             c2 = ctx(of, man[of])
             ca = c.ancestor(c2)
             if not ca: # unrelated
                 return
             if ca.path() == c.path() or ca.path() == c2.path():
                 fullcopy[c.path()] = of
                 if c == ca or c2 == ca: # no merge needed, ignore copy
                     return
                 copy[c.path()] = of
 
     def dirs(files):
         d = {}
         for f in files:
             d[os.path.dirname(f)] = True
         return d
 
     if not repo.ui.configbool("merge", "followcopies", True):
         return {}
 
     # avoid silly behavior for update from empty dir
     if not m1 or not m2 or not ma:
         return {}
 
     dcopies = repo.dirstate.copies()
     copy = {}
     fullcopy = {}
     u1 = nonoverlap(m1, m2, ma)
     u2 = nonoverlap(m2, m1, ma)
     ctx = util.cachefunc(lambda f, n: repo.filectx(f, fileid=n[:20]))
 
     for f in u1:
         checkcopies(ctx(dcopies.get(f, f), m1[f]), m2)
 
     for f in u2:
         checkcopies(ctx(f, m2[f]), m1)
 
     if not fullcopy or not repo.ui.configbool("merge", "followdirs", True):
         return copy
 
     # generate a directory move map
     d1, d2 = dirs(m1), dirs(m2)
     invalid = {}
     dirmove = {}
 
     for dst, src in fullcopy.items():
         dsrc, ddst = os.path.dirname(src), os.path.dirname(dst)
         if dsrc in invalid:
             continue
         elif (dsrc in d1 and ddst in d1) or (dsrc in d2 and ddst in d2):
             invalid[dsrc] = True
         elif dsrc in dirmove and dirmove[dsrc] != ddst:
             invalid[dsrc] = True
             del dirmove[dsrc]
         else:
             dirmove[dsrc] = ddst
 
     del d1, d2, invalid
 
     if not dirmove:
         return copy
 
     # check unaccounted nonoverlapping files
     for f in u1 + u2:
         if f not in fullcopy:
             d = os.path.dirname(f)
             if d in dirmove:
                 copy[f] = dirmove[d] + "/" + os.path.basename(f)
 
     return copy
 
 def manifestmerge(repo, p1, p2, pa, overwrite, partial):
     """
     Merge p1 and p2 with ancestor ma and generate merge action list
 
     overwrite = whether we clobber working files
     partial = function to filter file lists
     """
 
     repo.ui.note(_("resolving manifests\n"))
     repo.ui.debug(_(" overwrite %s partial %s\n") % (overwrite, bool(partial)))
     repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (pa, p1, p2))
 
     m1 = p1.manifest()
     m2 = p2.manifest()
     ma = pa.manifest()
     backwards = (pa == p2)
     action = []
     copy = {}
 
     def fmerge(f, f2=None, fa=None):
         """merge executable flags"""
         if not f2:
             f2 = f
             fa = f
         a, b, c = ma.execf(fa), m1.execf(f), m2.execf(f2)
         return ((a^b) | (a^c)) ^ a
 
     def act(msg, m, f, *args):
         repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m))
         action.append((f, m) + args)
 
     if not (backwards or overwrite):
         copy = findcopies(repo, m1, m2, ma, pa.rev())
     copied = dict.fromkeys(copy.values())
 
     # Compare manifests
     for f, n in m1.iteritems():
         if partial and not partial(f):
             continue
         if f in m2:
             # are files different?
             if n != m2[f]:
                 a = ma.get(f, nullid)
                 # are both different from the ancestor?
                 if not overwrite and n != a and m2[f] != a:
                     act("versions differ", "m", f, f, f, fmerge(f), False)
                 # are we clobbering?
                 # is remote's version newer?
                 # or are we going back in time and clean?
                 elif overwrite or m2[f] != a or (backwards and not n[20:]):
                     act("remote is newer", "g", f, m2.execf(f))
                 # local is newer, not overwrite, check mode bits
                 elif fmerge(f) != m1.execf(f):
                     act("update permissions", "e", f, m2.execf(f))
             # contents same, check mode bits
             elif m1.execf(f) != m2.execf(f):
                 if overwrite or fmerge(f) != m1.execf(f):
                     act("update permissions", "e", f, m2.execf(f))
         elif f in copied:
             continue
         elif f in copy:
             f2 = copy[f]
             if f2 not in m2: # directory rename
                 act("remote renamed directory to " + f2, "d",
                     f, None, f2, m1.execf(f))
             elif f2 in m1: # case 2 A,B/B/B
                 act("local copied to " + f2, "m",
                     f, f2, f, fmerge(f, f2, f2), False)
             else: # case 4,21 A/B/B
                 act("local moved to " + f2, "m",
                     f, f2, f, fmerge(f, f2, f2), False)
         elif f in ma:
             if n != ma[f] and not overwrite:
                 if repo.ui.prompt(
                     (_(" local changed %s which remote deleted\n") % f) +
                     _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("d"):
                     act("prompt delete", "r", f)
             else:
                 act("other deleted", "r", f)
         else:
             # file is created on branch or in working directory
             if (overwrite and n[20:] != "u") or (backwards and not n[20:]):
                 act("remote deleted", "r", f)
 
     for f, n in m2.iteritems():
         if partial and not partial(f):
             continue
         if f in m1:
             continue
         if f in copied:
             continue
         if f in copy:
             f2 = copy[f]
             if f2 not in m1: # directory rename
                 act("local renamed directory to " + f2, "d",
                     None, f, f2, m2.execf(f))
             elif f2 in m2: # rename case 1, A/A,B/A
                 act("remote copied to " + f, "m",
                     f2, f, f, fmerge(f2, f, f2), False)
             else: # case 3,20 A/B/A
                 act("remote moved to " + f, "m",
                     f2, f, f, fmerge(f2, f, f2), True)
         elif f in ma:
             if overwrite or backwards:
                 act("recreating", "g", f, m2.execf(f))
             elif n != ma[f]:
                 if repo.ui.prompt(
                     (_("remote changed %s which local deleted\n") % f) +
                     _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("k"):
                     act("prompt recreating", "g", f, m2.execf(f))
         else:
             act("remote created", "g", f, m2.execf(f))
 
     return action
 
 def applyupdates(repo, action, wctx, mctx):
     "apply the merge action list to the working directory"
 
     updated, merged, removed, unresolved = 0, 0, 0, 0
     action.sort()
     for a in action:
         f, m = a[:2]
         if f and f[0] == "/":
             continue
         if m == "r": # remove
             repo.ui.note(_("removing %s\n") % f)
             util.audit_path(f)
             try:
                 util.unlink(repo.wjoin(f))
             except OSError, inst:
                 if inst.errno != errno.ENOENT:
                     repo.ui.warn(_("update failed to remove %s: %s!\n") %
                                  (f, inst.strerror))
             removed += 1
         elif m == "m": # merge
             f2, fd, flag, move = a[2:]
             r = filemerge(repo, f, f2, wctx, mctx)
             if r > 0:
                 unresolved += 1
             else:
                 if r is None:
                     updated += 1
                 else:
                     merged += 1
                 if f != fd:
                     repo.ui.debug(_("copying %s to %s\n") % (f, fd))
                     repo.wwrite(fd, repo.wread(f))
                     if move:
                         repo.ui.debug(_("removing %s\n") % f)
                         os.unlink(repo.wjoin(f))
             util.set_exec(repo.wjoin(fd), flag)
         elif m == "g": # get
             flag = a[2]
             repo.ui.note(_("getting %s\n") % f)
             t = mctx.filectx(f).data()
             repo.wwrite(f, t)
             util.set_exec(repo.wjoin(f), flag)
             updated += 1
         elif m == "d": # directory rename
             f2, fd, flag = a[2:]
             if f:
                 repo.ui.note(_("moving %s to %s\n") % (f, fd))
                 t = wctx.filectx(f).data()
                 repo.wwrite(fd, t)
                 util.set_exec(repo.wjoin(fd), flag)
                 util.unlink(repo.wjoin(f))
             if f2:
                 repo.ui.note(_("getting %s to %s\n") % (f2, fd))
                 t = mctx.filectx(f2).data()
                 repo.wwrite(fd, t)
                 util.set_exec(repo.wjoin(fd), flag)
             updated += 1
         elif m == "e": # exec
             flag = a[2]
             util.set_exec(repo.wjoin(f), flag)
 
     return updated, merged, removed, unresolved
 
 def recordupdates(repo, action, branchmerge):
     "record merge actions to the dirstate"
 
     for a in action:
         f, m = a[:2]
         if m == "r": # remove
             if branchmerge:
                 repo.dirstate.update([f], 'r')
             else:
                 repo.dirstate.forget([f])
         elif m == "f": # forget
             repo.dirstate.forget([f])
         elif m == "g": # get
             if branchmerge:
                 repo.dirstate.update([f], 'n', st_mtime=-1)
             else:
                 repo.dirstate.update([f], 'n')
         elif m == "m": # merge
             f2, fd, flag, move = a[2:]
             if branchmerge:
                 # We've done a branch merge, mark this file as merged
                 # so that we properly record the merger later
                 repo.dirstate.update([fd], 'm')
                 if f != f2: # copy/rename
                     if move:
                         repo.dirstate.update([f], 'r')
                     if f != fd:
                         repo.dirstate.copy(f, fd)
                     else:
                         repo.dirstate.copy(f2, fd)
             else:
                 # We've update-merged a locally modified file, so
                 # we set the dirstate to emulate a normal checkout
                 # of that file some time in the past. Thus our
                 # merge will appear as a normal local file
                 # modification.
                 repo.dirstate.update([fd], 'n', st_size=-1, st_mtime=-1)
                 if move:
                     repo.dirstate.forget([f])
         elif m == "d": # directory rename
             f2, fd, flag = a[2:]
             if branchmerge:
                 repo.dirstate.update([fd], 'a')
                 if f:
                     repo.dirstate.update([f], 'r')
                     repo.dirstate.copy(f, fd)
                 if f2:
                     repo.dirstate.copy(f2, fd)
             else:
                 repo.dirstate.update([fd], 'n')
                 if f:
                     repo.dirstate.forget([f])
 
 def update(repo, node, branchmerge, force, partial, wlock):
     """
     Perform a merge between the working directory and the given node
 
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     partial = a function to filter file lists (dirstate not updated)
     wlock = working dir lock, if already held
     """
 
     if node is None:
         node = "tip"
 
     if not wlock:
         wlock = repo.wlock()
 
     overwrite = force and not branchmerge
     forcemerge = force and branchmerge
     wc = repo.workingctx()
     pl = wc.parents()
     p1, p2 = pl[0], repo.changectx(node)
     pa = p1.ancestor(p2)
     fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2)
 
     ### check phase
     if not overwrite and len(pl) > 1:
         raise util.Abort(_("outstanding uncommitted merges"))
     if pa == p1 or pa == p2: # is there a linear path from p1 to p2?
         if branchmerge:
             raise util.Abort(_("there is nothing to merge, just use "
                                "'hg update' or look at 'hg heads'"))
     elif not (overwrite or branchmerge):
         raise util.Abort(_("update spans branches, use 'hg merge' "
                            "or 'hg update -C' to lose changes"))
     if branchmerge and not forcemerge:
         if wc.files():
             raise util.Abort(_("outstanding uncommitted changes"))
 
     ### calculate phase
     action = []
     if not force:
         checkunknown(wc, p2)
     if not util.checkfolding(repo.path):
         checkcollision(p2)
     if not branchmerge:
         action += forgetremoved(wc, p2)
     action += manifestmerge(repo, wc, p2, pa, overwrite, partial)
 
     ### apply phase
     if not branchmerge: # just jump to the new rev
         fp1, fp2, xp1, xp2 = fp2, nullid, xp2, ''
     if not partial:
         repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
 
     stats = applyupdates(repo, action, wc, p2)
 
     if not partial:
         recordupdates(repo, action, branchmerge)
         repo.dirstate.setparents(fp1, fp2)
         repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3])
         if not branchmerge:
             repo.opener("branch", "w").write(p2.branch() + "\n")
 
     return stats