view hgext3rd/topic/compat.py @ 4976:6b306af9f52a mercurial-4.8

test-compat: merge mercurial-4.9 into mercurial-4.8

# Copyright 2017 FUJIWARA Katsunori <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""
Compatibility module
"""
from __future__ import absolute_import

from mercurial import (
    obsolete,
    pycompat,
    util,
)

getmarkers = None
successorssets = None
try:
    from mercurial import obsutil
    getmarkers = getattr(obsutil, 'getmarkers', None)
    successorssets = getattr(obsutil, 'successorssets', None)
except ImportError:
    pass

if getmarkers is None:
    getmarkers = obsolete.getmarkers
if successorssets is None:
    successorssets = obsolete.successorssets

if pycompat.ispy3:
    def branchmapitems(branchmap):
        return branchmap.items()
else:
    # py3-transform: off
    def branchmapitems(branchmap):
        return branchmap.iteritems()
    # py3-transform: on

# nodemap.get and index.[has_node|rev|get_rev]
# hg <= 5.3 (02802fa87b74)
def getgetrev(cl):
    """Returns index.get_rev or nodemap.get (for pre-5.3 Mercurial)."""
    if util.safehasattr(cl.index, 'get_rev'):
        return cl.index.get_rev
    return cl.nodemap.get