annotate hgext3rd/topic/revset.py @ 4064:a2c0133006c6

topic-revset: get the list of revset through the official localrepo API

This is simpler and faster. In addition we tighter the logic to be used in case
of empty topic. We do not need to fall back to revision search.

from __future__ import absolute_import

from mercurial import (
    error,
    registrar,
    revset,
    util,
)

from . import (
    destination,
    stack,
)

try:
    mkmatcher = revset._stringmatcher
except AttributeError:
    try:
        from mercurial.utils import stringutil
        mkmatcher = stringutil.stringmatcher
    except (ImportError, AttributeError):
        mkmatcher = util.stringmatcher

revsetpredicate = registrar.revsetpredicate()

def getstringstrict(x, err):
    if x and (x[0] == 'string'):
        return x[1]
    raise error.ParseError(err)

@revsetpredicate('topic([string or set])')
def topicset(repo, subset, x):
    """All changesets with the specified topic or the topics of the given
    changesets. Without the argument, all changesets with any topic specified.

    If `string` starts with `re:` the remainder of the name is treated
    as a regular expression.
    """
    args = revset.getargs(x, 0, 1, 'topic takes one or no arguments')

    mutable = revset._notpublic(repo, revset.fullreposet(repo), ())

    if not args:
        return (subset & mutable).filter(lambda r: bool(repo[r].topic()))

    try:
        topic = getstringstrict(args[0], '')
    except error.ParseError:
        # not a string, but another revset
        pass
    else:
        kind, pattern, matcher = mkmatcher(topic)

        def matches(r):
            topic = repo[r].topic()
            if not topic:
                return False
            return matcher(topic)

        if kind == 'literal':
            # note: falls through to the revset case if no topic with this name
            # exists and pattern kind is not specified explicitly

            if pattern not in repo.topics and topic.startswith('literal:'):
                raise error.RepoLookupError("topic '%s' does not exist"
                                            % pattern)
            return (subset & mutable).filter(matches)
        else:
            return (subset & mutable).filter(matches)

    s = revset.getset(repo, revset.fullreposet(repo), x)
    topics = set(repo[r].topic() for r in s)
    topics.discard('')

    def matches(r):
        if r in s:
            return True
        topic = repo[r].topic()
        if not topic:
            return False
        return topic in topics

    return (subset & mutable).filter(matches)

@revsetpredicate('ngtip([branch])')
def ngtipset(repo, subset, x):
    """The untopiced tip.

    Name is horrible so that people change it.
    """
    args = revset.getargs(x, 1, 1, 'topic takes one')
    # match a specific topic
    branch = revset.getstring(args[0], 'ngtip() argument must be a string')
    if branch == '.':
        branch = repo['.'].branch()
    return subset & revset.baseset(destination.ngtip(repo, branch))

@revsetpredicate('stack()')
def stackset(repo, subset, x):
    """All relevant changes in the current topic,

    This is roughly equivalent to 'topic(.) - obsolete' with a sorting moving
    unstable changeset after there future parent (as if evolve where already
    run)."""
    err = 'stack() takes no argument, it works on current topic'
    revset.getargs(x, 0, 0, err)
    topic = None
    branch = None
    if repo.currenttopic:
        topic = repo.currenttopic
    else:
        branch = repo[None].branch()
    return revset.baseset(stack.stack(repo, branch=branch, topic=topic)[1:]) & subset