view mercurial/stack.py @ 42277:dd6a9723ae2b

automation: don't create resources when deleting things

Otherwise running these commands can result in resources being
created. In the case of `purge-ec2-resources`, we will create
resources only to delete them immediately afterwards!

With this change, `purge-ec2-resources` now no-ops if no
resources exist.

# no-check-commit because foo_bar function name

Differential Revision: https://phab.mercurial-scm.org/D6285

# 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