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# Copyright (C) 2007 by the Free Software Foundation, Inc.
#
# 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 Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
"""The built in rule set."""
__all__ = ['initialize']
__metaclass__ = type
import os
import sys
from Mailman.interfaces import IRule
def initialize():
"""Initialize the built-in rules.
Rules are auto-discovered by searching for IRule implementations in all
importable modules in this subpackage.
"""
# Find all rules found in all modules inside our package.
import Mailman.rules
here = os.path.dirname(Mailman.rules.__file__)
for filename in os.listdir(here):
basename, extension = os.path.splitext(filename)
if extension <> '.py':
continue
module_name = 'Mailman.rules.' + basename
__import__(module_name, fromlist='*')
module = sys.modules[module_name]
for name in module.__all__:
rule = getattr(module, name)
if IRule.implementedBy(rule):
yield rule
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