view mercurial/stack.py @ 47169:a13f72b9ccfb

revlog: move index reading logic in a dedicated method

They are multiple motivation to do it:

* The logic is complicated enough to deserver its own method.

* We will need to reuse this once we put a docket in use.

* This split the actual reading from the processing of the read data better.

Differential Revision: https://phab.mercurial-scm.org/D10595

# stack.py - Mercurial functions for stack definition
#
#  Copyright Olivia 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