view mercurial/stack.py @ 38128:1cba497491be

narrow: only wrap dirstate functions once, instead of per-reposetup

chg will call reposetup multiple times, and we would end up double-wrapping (or
worse) the dirstate functions; this can cause issues like OSError 'No such file
or directory' during rebase operations, when we go to double-delete our
narrowspec backup file.

Differential Revision: https://phab.mercurial-scm.org/D3559

# 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