src/topic/__init__.py
author Augie Fackler <raf@durin42.com>
Fri, 11 Dec 2015 12:53:20 -0500
changeset 1874 ec28b6c3414a
parent 1873 04c971850183
child 1877 69077c65919d
permissions -rw-r--r--
topic: fix changing topics of commits that have an amend_source Includes a test for this specific case, but we should probably spend more time squinting at the interactions between the current topic wrapper function and commitctx for memctx instances.
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# __init__.py - topic extension
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""support for topic branches
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Topic branches are lightweight branches which
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disappear when changes are finalized.
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This is sort of similar to a bookmark, but it applies to a whole
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series instead of a single revision.
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"""
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import functools
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from mercurial.i18n import _
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from mercurial import cmdutil
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from mercurial import commands
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from mercurial import context
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from mercurial import error
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from mercurial import extensions
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from mercurial import lock
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from mercurial import merge
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from mercurial import namespaces
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from mercurial import node
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from mercurial import obsolete
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from mercurial import patch
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from mercurial import phases
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from mercurial import util
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from . import constants
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from . import revset as topicrevset
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from . import destination
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cmdtable = {}
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command = cmdutil.command(cmdtable)
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def _contexttopic(self):
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    return self.extra().get(constants.extrakey, '')
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context.basectx.topic = _contexttopic
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def _namemap(repo, name):
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    return [ctx.node() for ctx in
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            repo.set('not public() and extra(topic, %s)', name)]
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def _nodemap(repo, node):
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    ctx = repo[node]
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    t = ctx.topic()
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    if t and ctx.phase() > phases.public:
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        return [t]
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    return []
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def uisetup(ui):
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    destination.setupdest()
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def reposetup(ui, repo):
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    orig = repo.__class__
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    class topicrepo(repo.__class__):
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        def commit(self, *args, **kwargs):
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            backup = self.ui.backupconfig('ui', 'allowemptycommit')
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            try:
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                if repo.currenttopic != repo['.'].topic():
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                    # bypass the core "nothing changed" logic
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                    self.ui.setconfig('ui', 'allowemptycommit', True)
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                return orig.commit(self, *args, **kwargs)
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            finally:
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                self.ui.restoreconfig(backup)
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        def commitctx(self, ctx, error=None):
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            if isinstance(ctx, context.workingcommitctx):
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                current = self.currenttopic
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                if current:
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                    ctx.extra()[constants.extrakey] = current
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            if (isinstance(ctx, context.memctx) and
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                ctx.extra().get('amend_source') and
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                ctx.topic() and
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                not self.currenttopic):
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                # we are amending and need to remove a topic
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                del ctx.extra()[constants.extrakey]
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            return orig.commitctx(self, ctx, error=error)
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        @property
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        def topics(self):
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            topics = set(['', self.currenttopic])
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            for c in self.set('not public()'):
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                topics.add(c.topic())
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            topics.remove('')
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            return topics
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        @property
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        def currenttopic(self):
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            return self.vfs.tryread('topic')
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    repo.__class__ = topicrepo
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    if util.safehasattr(repo, 'names'):
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        repo.names.addnamespace(namespaces.namespace(
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            'topics', 'topic', namemap=_namemap, nodemap=_nodemap,
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            listnames=lambda repo: repo.topics))
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@command('topics [TOPIC]', [
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    ('', 'clear', False, 'clear active topic if any'),
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    ('', 'change', '', 'revset of existing revisions to change topic'),
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])
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def topics(ui, repo, topic='', clear=False, change=None):
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    """View current topic, set current topic, or see all topics."""
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    if change:
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        if not obsolete.isenabled(repo, obsolete.createmarkersopt):
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            raise util.Abort(_('must have obsolete enabled to use --change'))
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        if not topic and not clear:
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            raise util.Abort('changing topic requires a topic name or --clear')
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        if any(not c.mutable() for c in repo.set('%r and public()', change)):
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            raise util.Abort("can't change topic of a public change")
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        rewrote = 0
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        needevolve = False
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        l = repo.lock()
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        txn = repo.transaction('rewrite-topics')
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        try:
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           for c in repo.set('%r', change):
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               def filectxfn(repo, ctx, path):
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                   try:
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                       return c[path]
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                   except error.ManifestLookupError:
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                       return None
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               fixedextra = dict(c.extra())
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               ui.debug('old node id is %s\n' % node.hex(c.node()))
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               ui.debug('origextra: %r\n' % fixedextra)
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               newtopic = None if clear else topic
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               oldtopic = fixedextra.get(constants.extrakey, None)
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               if oldtopic == newtopic:
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                   continue
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               if clear:
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                   del fixedextra[constants.extrakey]
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               else:
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                   fixedextra[constants.extrakey] = topic
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               if 'amend_source' in fixedextra:
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                   # TODO: right now the commitctx wrapper in
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                   # topicrepo overwrites the topic in extra if
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                   # amend_source is set to support 'hg commit
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                   # --amend'. Support for amend should be adjusted
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   139
                   # to not be so invasive.
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                   del fixedextra['amend_source']
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               ui.debug('changing topic of %s from %s to %s\n' % (
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                   c, oldtopic, newtopic))
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               ui.debug('fixedextra: %r\n' % fixedextra)
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               mc = context.memctx(
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                   repo, (c.p1().node(), c.p2().node()), c.description(),
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                   c.files(), filectxfn,
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                   user=c.user(), date=c.date(), extra=fixedextra)
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               newnode = repo.commitctx(mc)
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               ui.debug('new node id is %s\n' % node.hex(newnode))
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               needevolve = needevolve or (len(c.children()) > 0)
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               obsolete.createmarkers(repo, [(c, (repo[newnode],))])
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               rewrote += 1
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           txn.close()
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        except:
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            try:
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                txn.abort()
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            finally:
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                repo.invalidate()
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            raise
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        finally:
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            lock.release(txn, l)
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        ui.status('changed topic on %d changes\n' % rewrote)
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        if needevolve:
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            evolvetarget = 'topic(%s)' % topic if topic else 'not topic()'
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            ui.status('please run hg evolve --rev "%s" now\n' % evolvetarget)
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    if clear:
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        if repo.vfs.exists('topic'):
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            repo.vfs.unlink('topic')
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        return
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    if topic:
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        with repo.vfs.open('topic', 'w') as f:
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            f.write(topic)
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        return
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    current = repo.currenttopic
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    for t in sorted(repo.topics):
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        marker = '*' if t == current else ' '
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        ui.write(' %s %s\n' % (marker, t))
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def summaryhook(ui, repo):
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    t = repo.currenttopic
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    if not t:
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        return
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    # i18n: column positioning for "hg summary"
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    ui.write(_("topic:  %s\n") % t)
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def commitwrap(orig, ui, repo, *args, **opts):
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    if opts.get('topic'):
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        t = opts['topic']
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        with repo.vfs.open('topic', 'w') as f:
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            f.write(t)
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    return orig(ui, repo, *args, **opts)
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   192
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def committextwrap(orig, repo, ctx, subs, extramsg):
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    ret = orig(repo, ctx, subs, extramsg)
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    t = repo.currenttopic
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   196
    if t:
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   197
        ret = ret.replace("\nHG: branch",
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   198
                          "\nHG: topic '%s'\nHG: branch" % t)
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   199
    return ret
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   200
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def mergeupdatewrap(orig, repo, node, branchmerge, force, partial,
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                    ancestor=None, mergeancestor=False, labels=None):
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   203
    wlock = repo.wlock()
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   204
    try:
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   205
        ret = orig(repo, node, branchmerge, force, partial, ancestor=ancestor,
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                   mergeancestor=mergeancestor, labels=labels)
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   207
        if not partial and not branchmerge:
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   208
            ot = repo.currenttopic
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   209
            t = ''
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   210
            pctx = repo[node]
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   211
            if pctx.phase() > phases.public:
1861
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   212
                t = pctx.topic()
1839
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            with repo.vfs.open('topic', 'w') as f:
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                f.write(t)
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   215
            if t and t != ot:
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   216
                repo.ui.status(_("switching to topic %s\n") % t)
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   217
        return ret
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   218
    finally:
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   219
        wlock.release()
1839
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   220
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   221
def _fixrebase(loaded):
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   222
    if not loaded:
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   223
        return
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   224
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   225
    def savetopic(ctx, extra):
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   226
        if ctx.topic():
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   227
            extra[constants.extrakey] = ctx.topic()
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   228
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   229
    def newmakeextrafn(orig, copiers):
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   230
        return orig(copiers + [savetopic])
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   231
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   232
    rebase = extensions.find("rebase")
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   233
    extensions.wrapfunction(rebase, '_makeextrafn', newmakeextrafn)
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diff changeset
   234
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   235
def _exporttopic(seq, ctx):
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   236
    topic = ctx.topic()
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   237
    if topic:
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   238
        return 'EXP-Topic %s'  % topic
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   239
    return None
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   240
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   241
def _importtopic(repo, patchdata, extra, opts):
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   242
    if 'topic' in patchdata:
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   243
        extra['topic'] = patchdata['topic']
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   244
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   245
extensions.afterloaded('rebase', _fixrebase)
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   246
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   247
entry = extensions.wrapcommand(commands.table, 'commit', commitwrap)
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   248
entry[1].append(('t', 'topic', '',
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   249
                 _("use specified topic"), _('TOPIC')))
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   250
1852
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   251
extensions.wrapfunction(cmdutil, 'buildcommittext', committextwrap)
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   252
extensions.wrapfunction(merge, 'update', mergeupdatewrap)
1843
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   253
topicrevset.modsetup()
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   254
cmdutil.summaryhooks.add('topic', summaryhook)
1866
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   255
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   256
if util.safehasattr(cmdutil, 'extraexport'):
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   257
    cmdutil.extraexport.append('topic')
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   258
    cmdutil.extraexportmap['topic'] = _exporttopic
1867
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   259
if util.safehasattr(cmdutil, 'extrapreimport'):
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   260
    cmdutil.extrapreimport.append('topic')
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   261
    cmdutil.extrapreimportmap['topic'] = _importtopic
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diff changeset
   262
if util.safehasattr(patch, 'patchheadermap'):
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diff changeset
   263
    patch.patchheadermap.append(('EXP-Topic', 'topic'))