view mercurial/stack.py @ 44856:b7808443ed6a

mergestate: split out merge state handling code from main merge module

There's already some pretty reasonable encapsulation here, but I want
to make the mergestate storage a property of the context so memctx
instances can do a reasonable thing. This is the first step in a
reshuffle to make that easier.

Differential Revision: https://phab.mercurial-scm.org/D8550

# stack.py - Mercurial functions for stack definition
#
#  Copyright Matt Mackall <[e-mail]> and other
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import


def getstack(repo, rev=None):
    """return a sorted smartrev of the stack containing either rev if it is
    not None or the current working directory parent.

    The stack will always contain all drafts changesets which are ancestors to
    the revision and are not merges.
    """
    if rev is None:
        rev = b'.'

    revspec = b'only(%s) and not public() and not ::merge()'
    revisions = repo.revs(revspec, rev)
    revisions.sort()
    return revisions