mercurial/stack.py

manifest: fix _very_ subtle bug with exact matchers passed to walk()

Prior to this fix, manifestdict.walk() with an exact matcher would blindly
list the files in the matcher, even if they weren't in the manifest. This was
exposed by my next patch where I rewrite filesnotin() to use walk() instead of
matches().

Differential Revision: https://phab.mercurial-scm.org/D8081

# 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