+
−from __future__ import absolute_import
+
−
+
−from mercurial import (
+
−    registrar,
+
−    revset,
+
−    util,
+
−)
+
−
+
−from . import (
+
−    constants,
+
−    destination,
+
−    stack,
+
−)
+
−
+
−try:
+
−    mkmatcher = revset._stringmatcher
+
−except AttributeError:
+
−    mkmatcher = util.stringmatcher
+
−
+
−revsetpredicate = registrar.revsetpredicate()
+
−
+
−@revsetpredicate('topic([topic])')
+
−def topicset(repo, subset, x):
+
−    """Specified topic or all changes with any topic specified.
+
−
+
−    If `topic` starts with `re:` the remainder of the name is treated
+
−    as a regular expression.
+
−
+
−    TODO: make `topic(revset)` work the same as `branch(revset)`.
+
−    """
+
−    args = revset.getargs(x, 0, 1, 'topic takes one or no arguments')
+
−    if args:
+
−        # match a specific topic
+
−        topic = revset.getstring(args[0], 'topic() argument must be a string')
+
−        if topic == '.':
+
−            topic = repo['.'].extra().get('topic', '')
+
−        _kind, _pattern, matcher = mkmatcher(topic)
+
−    else:
+
−        matcher = lambda t: bool(t)
+
−
+
−    mutable = revset._notpublic(repo, revset.fullreposet(repo), ())
+
−
+
−    rawchange = repo.changelog.changelogrevision
+
−    key = constants.extrakey
+
−
+
−    def matchtopic(r):
+
−        topic = rawchange(r).extra.get(key)
+
−        if topic is None:
+
−            return False
+
−        return matcher(topic)
+
−    return (subset & mutable).filter(matchtopic)
+
−
+
−@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