|
|
# repoviewutil.py - constaints data relevant to repoview.py and other module
|
|
|
#
|
|
|
# Copyright 2012 Pierre-Yves David <pierre-yves.david@ens-lyon.org>
|
|
|
# Logilab SA <contact@logilab.fr>
|
|
|
#
|
|
|
# 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 annotations
|
|
|
|
|
|
from .. import error
|
|
|
|
|
|
### Nearest subset relation
|
|
|
# Nearest subset of filter X is a filter Y so that:
|
|
|
# * Y is included in X,
|
|
|
# * X - Y is as small as possible.
|
|
|
# This create and ordering used for branchmap purpose.
|
|
|
# the ordering may be partial
|
|
|
subsettable = {
|
|
|
None: b'visible',
|
|
|
b'visible-hidden': b'visible',
|
|
|
b'visible': b'served',
|
|
|
b'served.hidden': b'served',
|
|
|
b'served': b'immutable',
|
|
|
b'immutable': b'base',
|
|
|
}
|
|
|
|
|
|
|
|
|
def get_ordered_subset():
|
|
|
"""return a list of subset name from dependencies to dependents"""
|
|
|
_unfinalized = set(subsettable.values())
|
|
|
ordered = []
|
|
|
|
|
|
# the subset table is expected to be small so we do the stupid N² version
|
|
|
# of the algorithm
|
|
|
while _unfinalized:
|
|
|
this_level = []
|
|
|
for candidate in _unfinalized:
|
|
|
dependency = subsettable.get(candidate)
|
|
|
if dependency not in _unfinalized:
|
|
|
this_level.append(candidate)
|
|
|
|
|
|
if not this_level:
|
|
|
msg = "cyclic dependencies in repoview subset %r"
|
|
|
msg %= subsettable
|
|
|
raise error.ProgrammingError(msg)
|
|
|
|
|
|
this_level.sort(key=lambda x: x if x is not None else '')
|
|
|
|
|
|
ordered.extend(this_level)
|
|
|
_unfinalized.difference_update(this_level)
|
|
|
|
|
|
return ordered
|
|
|
|
