view hgext3rd/topic/compat.py @ 6234:7e2dd2159414

obshistory: rename cyclic to findcycle and correct its docstring

If there's a cycle, we return a set, not a boolean. So we align the other
return to be None instead of False and update doc and tests.

# 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 (
    cmdutil,
    extensions,
    pycompat,
    registrar,
    util,
)

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

# help category compatibility
# hg <= 4.7 (c303d65d2e34)
def helpcategorykwargs(categoryname):
    """Backwards-compatible specification of the helpategory argument."""
    category = getattr(registrar.command, categoryname, None)
    if not category:
        return {}
    return {'helpcategory': category}

# nodemap.get and index.[has_node|rev|get_rev]
# hg <= 5.2 (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

# hg <= 5.4 (e2d17974a869)
def nonpublicphaseroots(repo):
    if util.safehasattr(repo._phasecache, 'nonpublicphaseroots'):
        return repo._phasecache.nonpublicphaseroots(repo)
    return set().union(
        *[roots for roots in repo._phasecache.phaseroots[1:] if roots]
    )

def overridecommitstatus(overridefn):
    if r'tip' in cmdutil.commitstatus.__code__.co_varnames:
        extensions.wrapfunction(cmdutil, 'commitstatus', overridefn)
    else:
        # hg <= 5.6 (976b26bdd0d8)
        def _override(orig, repo, node, branch, bheads=None, opts=None):
            def _orig(repo, node, branch, bheads=None, tip=None, opts=None):
                return orig(repo, node, branch, bheads=bheads, opts=opts)
            return overridefn(_orig, repo, node, branch, bheads=bheads, tip=None, opts=opts)
        extensions.wrapfunction(cmdutil, 'commitstatus', _override)