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# Copyright (C) 2008-2009 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""The built in set of pipeline handlers."""
from __future__ import absolute_import, unicode_literals
__metaclass__ = type
__all__ = [
'initialize',
]
import os
import sys
from mailman.interfaces.handler import IHandler
def initialize():
"""Initialize the built-in handlers.
Rules are auto-discovered by searching for IHandler implementations in all
importable modules in this subpackage.
"""
# Find all rules found in all modules inside our package.
import mailman.pipeline
here = os.path.dirname(mailman.pipeline.__file__)
for filename in os.listdir(here):
basename, extension = os.path.splitext(filename)
if extension <> '.py':
continue
module_name = 'mailman.pipeline.' + basename
__import__(module_name, fromlist='*')
module = sys.modules[module_name]
for name in getattr(module, '__all__', ()):
handler = getattr(module, name)
if IHandler.implementedBy(handler):
yield handler
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