view hgext3rd/topic/compat.py @ 3385:823031b51d81

evolve: don't use graftstate for continuing `hg evolve`

Before this patch, if user runs `hg evolve`, we read the evolve state, write a
graftstate from that information and run graft command. This patch replaces that
logic with new logic which does not depends on the graft state.

The new logic is very filtered part of logic from graft command. We did not
require a lot of opts checking and filtering revs logic from the graft command
as our use case is fixed.

This is the start of series/work which will make `hg evolve` better and have
a good statefile for itself.

# 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,
    scmutil,
    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

def startpager(ui, cmd):
    """function to start a pager in case ui.pager() exists"""
    try:
        ui.pager(cmd)
    except AttributeError:
        pass

def cleanupnodes(repo, replacements, operation, moves=None):
    # create obsmarkers and move bookmarks
    # XXX we should be creating marker as we go instead of only at the end,
    # this makes the operations more modulars
    if util.safehasattr(scmutil, 'cleanupnodes'):
        scmutil.cleanupnodes(repo, replacements, 'changetopics',
                             moves=moves)
    else:
        relations = [(repo[o], tuple(repo[n] for n in new))
                     for (o, new) in replacements.iteritems()]
        obsolete.createmarkers(repo, relations)