hgext3rd/topic/topicmap.py
author Pierre-Yves David <pierre-yves.david@octobus.net>
Fri, 19 May 2017 17:34:45 +0200
branchstable
changeset 2443 6a23a55f77d2
parent 2004 410b7153480a
child 2653 13313d0cab71
permissions -rw-r--r--
next: prevent a color related crash when evolve This was not caught by test because they run color less.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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import contextlib
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import hashlib
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from mercurial.node import hex, bin, nullid
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from mercurial import (
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    branchmap,
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    changegroup,
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    cmdutil,
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    encoding,
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    error,
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    extensions,
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    scmutil,
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)
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def _filename(repo):
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    """name of a branchcache file for a given repo or repoview"""
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    filename = "cache/topicmap"
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    if repo.filtername:
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        filename = '%s-%s' % (filename, repo.filtername)
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    return filename
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oldbranchcache = branchmap.branchcache
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def _phaseshash(repo, maxrev):
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    revs = set()
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    cl = repo.changelog
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    fr = cl.filteredrevs
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    nm = cl.nodemap
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    for roots in repo._phasecache.phaseroots[1:]:
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        for n in roots:
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            r = nm.get(n)
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            if r not in fr and r < maxrev:
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                revs.add(r)
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    key = nullid
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    revs = sorted(revs)
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    if revs:
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        s = hashlib.sha1()
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        for rev in revs:
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            s.update('%s;' % rev)
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        key = s.digest()
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    return key
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@contextlib.contextmanager
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def usetopicmap(repo):
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    """use awful monkey patching to ensure topic map usage
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    During the extend of the context block, The topicmap should be used and
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    updated instead of the branchmap."""
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    oldbranchcache = branchmap.branchcache
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    oldfilename = branchmap._filename
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    oldread = branchmap.read
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    oldcaches = getattr(repo, '_branchcaches', {})
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    try:
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        branchmap.branchcache = topiccache
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        branchmap._filename = _filename
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        branchmap.read = readtopicmap
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        repo._branchcaches = getattr(repo, '_topiccaches', {})
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        yield
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        repo._topiccaches = repo._branchcaches
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    finally:
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        repo._branchcaches = oldcaches
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        branchmap.branchcache = oldbranchcache
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        branchmap._filename = oldfilename
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        branchmap.read = oldread
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def cgapply(orig, repo, *args, **kwargs):
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    """make sure a topicmap is used when applying a changegroup"""
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    with usetopicmap(repo):
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        return orig(repo, *args, **kwargs)
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def commitstatus(orig, repo, node, branch, bheads=None, opts=None):
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    # wrap commit status use the topic branch heads
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    ctx = repo[node]
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    if ctx.topic() and ctx.branch() == branch:
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        bheads = repo.branchheads("%s:%s" % (branch, ctx.topic()))
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    return orig(repo, node, branch, bheads=bheads, opts=opts)
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class topiccache(oldbranchcache):
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    def __init__(self, *args, **kwargs):
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        otherbranchcache = branchmap.branchcache
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        try:
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            # super() call may fail otherwise
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            branchmap.branchcache = oldbranchcache
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            super(topiccache, self).__init__(*args, **kwargs)
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            if self.filteredhash is None:
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                self.filteredhash = nullid
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            self.phaseshash = nullid
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        finally:
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            branchmap.branchcache = otherbranchcache
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    def copy(self):
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        """return an deep copy of the branchcache object"""
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        new = topiccache(self, self.tipnode, self.tiprev, self.filteredhash,
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                         self._closednodes)
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        if self.filteredhash is None:
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            self.filteredhash = nullid
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        new.phaseshash = self.phaseshash
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        return new
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    def branchtip(self, branch, topic=''):
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        '''Return the tipmost open head on branch head, otherwise return the
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        tipmost closed head on branch.
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        Raise KeyError for unknown branch.'''
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        if topic:
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            branch = '%s:%s' % (branch, topic)
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        return super(topiccache, self).branchtip(branch)
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    def branchheads(self, branch, closed=False, topic=''):
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        if topic:
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            branch = '%s:%s' % (branch, topic)
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        return super(topiccache, self).branchheads(branch, closed=closed)
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    def validfor(self, repo):
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        """Is the cache content valid regarding a repo
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        - False when cached tipnode is unknown or if we detect a strip.
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diff changeset
   118
        - True when cache is up to date or a subset of current repo."""
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parents: 1885
diff changeset
   119
        # This is copy paste of mercurial.branchmap.branchcache.validfor in
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   120
        # 69077c65919d With a small changes to the cache key handling to
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diff changeset
   121
        # include phase information that impact the topic cache.
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   122
        #
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   123
        # All code changes should be flagged on site.
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   124
        try:
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diff changeset
   125
            if (self.tipnode == repo.changelog.node(self.tiprev)):
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parents: 1885
diff changeset
   126
                fh = scmutil.filteredhash(repo, self.tiprev)
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   127
                if fh is None:
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   128
                    fh = nullid
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   129
                if ((self.filteredhash == fh)
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parents: 1970
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   130
                    and (self.phaseshash == _phaseshash(repo, self.tiprev))):
1890
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   131
                    return True
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   132
            return False
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   133
        except IndexError:
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   134
            return False
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   135
1885
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   136
    def write(self, repo):
1890
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   137
        # This is copy paste of mercurial.branchmap.branchcache.write in
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   138
        # 69077c65919d With a small changes to the cache key handling to
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   139
        # include phase information that impact the topic cache.
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   140
        #
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   141
        # All code changes should be flagged on site.
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diff changeset
   142
        try:
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diff changeset
   143
            f = repo.vfs(_filename(repo), "w", atomictemp=True)
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parents: 1885
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   144
            cachekey = [hex(self.tipnode), str(self.tiprev)]
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parents: 1885
diff changeset
   145
            # [CHANGE] we need a hash in all cases
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parents: 1885
diff changeset
   146
            assert self.filteredhash is not None
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parents: 1885
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   147
            cachekey.append(hex(self.filteredhash))
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   148
            cachekey.append(hex(self.phaseshash))
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parents: 1885
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   149
            f.write(" ".join(cachekey) + '\n')
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   150
            nodecount = 0
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parents: 1885
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   151
            for label, nodes in sorted(self.iteritems()):
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   152
                for node in nodes:
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   153
                    nodecount += 1
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diff changeset
   154
                    if node in self._closednodes:
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   155
                        state = 'c'
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   156
                    else:
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diff changeset
   157
                        state = 'o'
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   158
                    f.write("%s %s %s\n" % (hex(node), state,
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parents: 1885
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   159
                                            encoding.fromlocal(label)))
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   160
            f.close()
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parents: 1885
diff changeset
   161
            repo.ui.log('branchcache',
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parents: 1885
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   162
                        'wrote %s branch cache with %d labels and %d nodes\n',
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parents: 1885
diff changeset
   163
                        repo.filtername, len(self), nodecount)
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parents: 1885
diff changeset
   164
        except (IOError, OSError, error.Abort) as inst:
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parents: 1885
diff changeset
   165
            repo.ui.debug("couldn't write branch cache: %s\n" % inst)
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parents: 1885
diff changeset
   166
            # Abort may be raise by read only opener
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parents: 1885
diff changeset
   167
            pass
1885
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parents:
diff changeset
   168
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parents:
diff changeset
   169
    def update(self, repo, revgen):
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parents:
diff changeset
   170
        """Given a branchhead cache, self, that may have extra nodes or be
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parents:
diff changeset
   171
        missing heads, and a generator of nodes that are strictly a superset of
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parents:
diff changeset
   172
        heads missing, this function updates self to be correct.
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parents:
diff changeset
   173
        """
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parents:
diff changeset
   174
        oldgetbranchinfo = repo.revbranchcache().branchinfo
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parents:
diff changeset
   175
        try:
d49f75eab6a3 topic: take topic in account for all branch head computation
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parents:
diff changeset
   176
            def branchinfo(r):
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parents:
diff changeset
   177
                info = oldgetbranchinfo(r)
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parents:
diff changeset
   178
                topic = ''
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parents:
diff changeset
   179
                ctx = repo[r]
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parents:
diff changeset
   180
                if ctx.mutable():
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parents:
diff changeset
   181
                    topic = ctx.topic()
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parents:
diff changeset
   182
                branch = info[0]
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parents:
diff changeset
   183
                if topic:
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parents:
diff changeset
   184
                    branch = '%s:%s' % (branch, topic)
d49f75eab6a3 topic: take topic in account for all branch head computation
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parents:
diff changeset
   185
                return (branch, info[1])
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parents:
diff changeset
   186
            repo.revbranchcache().branchinfo = branchinfo
1890
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parents: 1885
diff changeset
   187
            super(topiccache, self).update(repo, revgen)
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parents: 1885
diff changeset
   188
            if self.filteredhash is None:
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parents: 1885
diff changeset
   189
                self.filteredhash = nullid
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parents: 1885
diff changeset
   190
            self.phaseshash = _phaseshash(repo, self.tiprev)
1885
d49f75eab6a3 topic: take topic in account for all branch head computation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
diff changeset
   191
        finally:
d49f75eab6a3 topic: take topic in account for all branch head computation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
diff changeset
   192
            repo.revbranchcache().branchinfo = oldgetbranchinfo
1890
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parents: 1885
diff changeset
   193
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parents: 1885
diff changeset
   194
def readtopicmap(repo):
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parents: 1885
diff changeset
   195
    # This is copy paste of mercurial.branchmap.read in 69077c65919d
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parents: 1885
diff changeset
   196
    # With a small changes to the cache key handling to include phase
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parents: 1885
diff changeset
   197
    # information that impact the topic cache.
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parents: 1885
diff changeset
   198
    #
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parents: 1885
diff changeset
   199
    # All code changes should be flagged on site.
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parents: 1885
diff changeset
   200
    try:
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parents: 1885
diff changeset
   201
        f = repo.vfs(_filename(repo))
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parents: 1885
diff changeset
   202
        lines = f.read().split('\n')
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parents: 1885
diff changeset
   203
        f.close()
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parents: 1885
diff changeset
   204
    except (IOError, OSError):
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diff changeset
   205
        return None
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parents: 1885
diff changeset
   206
e846b8f402d0 topicmap: write and read format from disc
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parents: 1885
diff changeset
   207
    try:
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parents: 1885
diff changeset
   208
        cachekey = lines.pop(0).split(" ", 2)
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parents: 1885
diff changeset
   209
        last, lrev = cachekey[:2]
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parents: 1885
diff changeset
   210
        last, lrev = bin(last), int(lrev)
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parents: 1885
diff changeset
   211
        filteredhash = bin(cachekey[2]) # [CHANGE] unconditional filteredhash
1927
cf33ba7fbf4b topiccache: directly instantiate a topiccache object when reading
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1901
diff changeset
   212
        partial = topiccache(tipnode=last, tiprev=lrev,
1928
be0bc9dcb930 topicmap: whitespace
Sean Farley <sean@farley.io>
parents: 1927
diff changeset
   213
                             filteredhash=filteredhash)
1890
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parents: 1885
diff changeset
   214
        partial.phaseshash = bin(cachekey[3]) # [CHANGE] read phaseshash
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parents: 1885
diff changeset
   215
        if not partial.validfor(repo):
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parents: 1885
diff changeset
   216
            # invalidate the cache
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parents: 1885
diff changeset
   217
            raise ValueError('tip differs')
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parents: 1885
diff changeset
   218
        cl = repo.changelog
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parents: 1885
diff changeset
   219
        for l in lines:
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Pierre-Yves David <pierre-yves.david@fb.com>
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diff changeset
   220
            if not l:
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Pierre-Yves David <pierre-yves.david@fb.com>
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diff changeset
   221
                continue
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parents: 1885
diff changeset
   222
            node, state, label = l.split(" ", 2)
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parents: 1885
diff changeset
   223
            if state not in 'oc':
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
diff changeset
   224
                raise ValueError('invalid branch state')
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
diff changeset
   225
            label = encoding.tolocal(label.strip())
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parents: 1885
diff changeset
   226
            node = bin(node)
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parents: 1885
diff changeset
   227
            if not cl.hasnode(node):
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parents: 1885
diff changeset
   228
                raise ValueError('node %s does not exist' % hex(node))
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parents: 1885
diff changeset
   229
            partial.setdefault(label, []).append(node)
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parents: 1885
diff changeset
   230
            if state == 'c':
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parents: 1885
diff changeset
   231
                partial._closednodes.add(node)
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parents: 1885
diff changeset
   232
    except KeyboardInterrupt:
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parents: 1885
diff changeset
   233
        raise
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
diff changeset
   234
    except Exception as inst:
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
diff changeset
   235
        if repo.ui.debugflag:
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parents: 1885
diff changeset
   236
            msg = 'invalid branchheads cache'
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
diff changeset
   237
            if repo.filtername is not None:
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
diff changeset
   238
                msg += ' (%s)' % repo.filtername
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
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   239
            msg += ': %s\n'
e846b8f402d0 topicmap: write and read format from disc
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parents: 1885
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   240
            repo.ui.debug(msg % inst)
e846b8f402d0 topicmap: write and read format from disc
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1885
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   241
        partial = None
e846b8f402d0 topicmap: write and read format from disc
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parents: 1885
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   242
    return partial
1950
99c1a26abf3f topicmap: move 'cgapply' wrapping into the topicmap module
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1949
diff changeset
   243
99c1a26abf3f topicmap: move 'cgapply' wrapping into the topicmap module
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1949
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   244
def modsetup(ui):
99c1a26abf3f topicmap: move 'cgapply' wrapping into the topicmap module
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parents: 1949
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   245
    """call at uisetup time to install various wrappings"""
99c1a26abf3f topicmap: move 'cgapply' wrapping into the topicmap module
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1949
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   246
    extensions.wrapfunction(changegroup.cg1unpacker, 'apply', cgapply)
1953
bdc5bb223b50 commit: wrap "commitstatus" to take topic into account
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 1950
diff changeset
   247
    extensions.wrapfunction(cmdutil, 'commitstatus', commitstatus)