view mercurial/stack.py @ 37611:ae8730877371

httppeer: basic implementation of capabilities interface

This is a bit crude. The capabilities mechanism for version 2 of
the wire protocol is a bit different from version 1. And code
in core is relying on strings passed to capable() matching strings
advertised by the "capabilities" wire protocol command. I may
refactor the internal checking mechanism to be a bit more
abstract or based on interfaces. Time will tell...

Differential Revision: https://phab.mercurial-scm.org/D3256

# 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

from . import (
    revsetlang,
    scmutil,
)

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 = '.'

    revspec = 'reverse(only(%s) and not public() and not ::merge())'
    revset = revsetlang.formatspec(revspec, rev)
    revisions = scmutil.revrange(repo, [revset])
    revisions.sort()
    return revisions