# Various utility function for the evolve extension

#

# Copyright 2017 Pierre-Yves David <pierre-yves.david@ens-lyon.org>

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

from mercurial import node

def obsexcmsg(ui, message, important=False):

    verbose = ui.configbool('experimental', 'verbose-obsolescence-exchange',

                            False)

    if verbose:

        message = 'OBSEXC: ' + message

    if important or verbose:

        ui.status(message)

def obsexcprg(ui, *args, **kwargs):

    topic = 'obsmarkers exchange'

    if ui.configbool('experimental', 'verbose-obsolescence-exchange', False):

        topic = 'OBSEXC'

    ui.progress(topic, *args, **kwargs)

_depthcache = {}

def depth(repo, rev):

    cl = repo.changelog

    n = cl.node(rev)

    revdepth = _depthcache.get(n, None)

    if revdepth is None:

        p1, p2 = cl.parentrevs(rev)

        if p1 == node.nullrev:

            revdepth = 1

        elif p2 == node.nullrev:

            revdepth = depth(repo, p1) + 1

        else:

        _depthcache[n] = revdepth

    return revdepth