src/topic/__init__.py
author Matt Mackall <mpm@selenic.com>
Wed, 10 Jun 2015 17:13:15 -0500
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parent 1849 9218f91619f6
child 1851 67d53e8e0c1a
permissions -rw-r--r--
commit: add a --topic flag
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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 extensions
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from mercurial import namespaces
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from mercurial import obsolete
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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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cmdtable = {}
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command = cmdutil.command(cmdtable)
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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.extra().get(constants.extrakey, '')
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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 reposetup(ui, repo):
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    orig = repo.__class__
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    class topicrepo(repo.__class__):
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        def commitctx(self, ctx, error=None):
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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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            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.extra().get(constants.extrakey, ''))
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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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    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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    repo.__class__ = topicrepo
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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=None, clear=False, change=None):
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    """View current topic, set current topic, or see all topics."""
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    if not obsolete.isenabled(repo, obsolete.createmarkersopt):
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        raise util.Abort('current reality means you should only '
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                         'use topic with obsolete enabled')
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    if change:
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        if topic is None 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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        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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            newtopic = None if clear else topic
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            if fixedextra.get(constants.extrakey, None) == topic:
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                continue
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            if clear and constants.extrakey in fixedextra:
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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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            c.parents()
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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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            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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        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 is not None:
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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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def updatewrap(orig, ui, repo, *args, **kwargs):
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    ret = orig(ui, repo, *args, **kwargs)
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    pctx = repo['.']
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    ot = repo.currenttopic
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    if pctx.phase() == phases.public and repo.vfs.exists('topic'):
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        repo.vfs.unlink('topic')
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    else:
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        # inherit the topic of the parent revision
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        t = pctx.extra().get(constants.extrakey, '')
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        if t and pctx.phase() > phases.public:
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            with repo.vfs.open('topic', 'w') as f:
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                f.write(t)
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            if t != ot:
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                ui.status(_("switching to topic %s\n") % t)
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    return ret
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entry = extensions.wrapcommand(commands.table, 'commit', commitwrap)
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entry[1].append(('t', 'topic', '',
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                 _("use specified topic"), _('TOPIC')))
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extensions.wrapcommand(commands.table, 'update', updatewrap)
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topicrevset.modsetup()
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cmdutil.summaryhooks.add('topic', summaryhook)