# stack.py - code related to stack workflow
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from mercurial.i18n import _
from mercurial import error

def _getstack(repo, topic):
    # XXX need to exclude obsolete changesets
    # XXX need sorting
    return repo.revs("topic(%s)", topic)

def showstack(ui, repo, topic):
    if not topic:
        topic = repo.currenttopic
    if not topic:
        raise error.Abort(_('no active topic to list'))
    for r in _getstack(repo, topic):
        # super crude initial version
        ui.write(repo[r].description().splitlines()[0] + '\n')