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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)