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# demand.py
# Demand sheet and related classes.
#
# Copyright (C) 2014-2015 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details. You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
from __future__ import unicode_literals
class _BoolDefault(object):
def __init__(self, default):
self.default = default
self._storing_name = '__%s%x' % (self.__class__.__name__, id(self))
def __get__(self, obj, objtype=None):
objdict = obj.__dict__
if self._storing_name in objdict:
return objdict[self._storing_name]
return self.default
def __set__(self, obj, val):
objdict = obj.__dict__
if self._storing_name in objdict:
current_val = objdict[self._storing_name]
if current_val != val:
raise AttributeError('Demand already set.')
objdict[self._storing_name] = val
class DemandSheet(object):
"""Collection of demands that different CLI parts have on other parts. :api"""
# :api...
allow_erasing = _BoolDefault(False)
available_repos = _BoolDefault(False)
resolving = _BoolDefault(False)
root_user = _BoolDefault(False)
sack_activation = _BoolDefault(False)
load_system_repo = _BoolDefault(True)
success_exit_status = 0
cacheonly = _BoolDefault(False)
fresh_metadata = _BoolDefault(True)
freshest_metadata = _BoolDefault(False)
changelogs = _BoolDefault(False)
transaction_display = None
# This demand controlls applicability of the plugins that could filter
# repositories packages (e.g. versionlock).
# If it stays None, the demands.resolving is used as a fallback.
plugin_filtering_enabled = _BoolDefault(None)