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# Copyright (C) 2009-2016 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 'mailman' command dispatcher."""
__all__ = [
'main',
]
import os
import argparse
from functools import cmp_to_key
from mailman.core.i18n import _
from mailman.core.initialize import initialize
from mailman.interfaces.command import ICLISubCommand
from mailman.utilities.modules import find_components
from mailman.version import MAILMAN_VERSION_FULL
from zope.interface.verify import verifyObject
def main():
"""The `mailman` command dispatcher."""
# Create the basic parser and add all globally common options.
parser = argparse.ArgumentParser(
description=_("""\
The GNU Mailman mailing list management system
Copyright 1998-2016 by the Free Software Foundation, Inc.
http://www.list.org
"""),
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument(
'-v', '--version',
action='version', version=MAILMAN_VERSION_FULL,
help=_('Print this version string and exit'))
parser.add_argument(
'-C', '--config',
help=_("""\
Configuration file to use. If not given, the environment variable
MAILMAN_CONFIG_FILE is consulted and used if set. If neither are
given, a default configuration file is loaded."""))
# Look at all modules in the mailman.bin package and if they are prepared
# to add a subcommand, let them do so. I'm still undecided as to whether
# this should be pluggable or not. If so, then we'll probably have to
# partially parse the arguments now, then initialize the system, then find
# the plugins. Punt on this for now.
subparser = parser.add_subparsers(title='Commands')
subcommands = []
for command_class in find_components('mailman.commands', ICLISubCommand):
command = command_class()
verifyObject(ICLISubCommand, command)
subcommands.append(command)
# --help should display the subcommands by alphabetical order, except that
# 'mailman help' should be first.
def sort_function(command, other):
"""Sorting helper."""
if command.name == 'help':
return -1
elif other.name == 'help':
return 1
elif command.name < other.name:
return -1
elif command.name == other.name:
return 0
else:
assert command.name > other.name
return 1
subcommands.sort(key=cmp_to_key(sort_function))
for command in subcommands:
command_parser = subparser.add_parser(
command.name, help=_(command.__doc__))
command.add(parser, command_parser)
command_parser.set_defaults(func=command.process)
args = parser.parse_args()
if len(args.__dict__) <= 1:
# No arguments or subcommands were given.
parser.print_help()
parser.exit()
# Initialize the system. Honor the -C flag if given.
config_path = (None if args.config is None
else os.path.abspath(os.path.expanduser(args.config)))
initialize(config_path)
# Perform the subcommand option.
args.func(args)
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