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