# -*- coding: utf-8 -*- # smolt - Fedora hardware profiler # # Copyright (C) 2009 Sebastian Pipping <sebastian@pipping.org> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty 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 St, Fifth Floor, Boston, MA 02110-1301, USA. import ConfigParser import os import logging class _Gate: def __init__(self, the_only_config_file): config_files = (the_only_config_file == None) and \ ['/etc/smolt/client.cfg', os.path.expanduser('~/.smolt/client.cfg')] or \ [the_only_config_file] self.config = ConfigParser.ConfigParser() self.config.read(config_files) def grants(*args): assert 2 <= len(args) <= 3 if len(args) == 2: self, data_set = args distro = 'any' else: self, distro, data_set = args res = self._grants(distro, data_set) logging.debug('Section "%s", key "%s" --> "%s"' % (distro, data_set, str(res))) return res def _grants(self, distro, data_set): try: return self.config.getboolean(distro, data_set) except (ValueError, ConfigParser.NoOptionError, ConfigParser.NoSectionError): # TODO warn about error? # Allow if in doubt - backwards compat return True def process(self, data_set, value_if_granted, value_else): if self.grants(data_set): return value_if_granted else: return value_else _gate = None def Gate(): """Simple singleton wrapper with lazy initialization""" global _gate if _gate == None: _gate = _Gate(None) return _gate def GateFromConfig(the_only_config_file): """Simple singleton wrapper with lazy initialization""" global _gate if _gate == None: _gate = _Gate(the_only_config_file) return _gate

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