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# -*- coding: utf-8 -*-
# plugins.py
# Copyright (C) 2015 LEAP
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
"""
Twisted plugins leap utilities.
"""
import os.path
from twisted.plugin import getPlugins
from leap.common.config import get_path_prefix
# A whitelist of modules from where to collect plugins dynamically.
# For the moment restricted to leap namespace, but the idea is that we can pass
# other "trusted" modules as options to the initialization of soledad.
# TODO discover all the namespace automagically
PLUGGABLE_LEAP_MODULES = ('mail', 'keymanager')
_preffix = get_path_prefix()
rc_file = os.path.join(_preffix, "leap", "leap.cfg")
def _get_extra_pluggable_modules():
import ConfigParser
config = ConfigParser.RawConfigParser()
config.read(rc_file)
try:
modules = eval(
config.get('plugins', 'extra_pluggable_modules'), {}, {})
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError,
ConfigParser.MissingSectionHeaderError):
modules = []
return modules
if os.path.isfile(rc_file):
# TODO in the case of being called from the standalone client,
# we should pass the flag in some other way.
EXTRA_PLUGGABLE_MODULES = _get_extra_pluggable_modules()
else:
EXTRA_PLUGGABLE_MODULES = []
def collect_plugins(interface):
"""
Traverse a whitelist of modules and collect all the plugins that implement
the passed interface.
"""
plugins = []
for namespace in PLUGGABLE_LEAP_MODULES:
try:
module = __import__('leap.%s.plugins' % namespace, fromlist='.')
plugins = plugins + list(getPlugins(interface, module))
except ImportError:
pass
for namespace in EXTRA_PLUGGABLE_MODULES:
try:
module = __import__('%s.plugins' % namespace, fromlist='.')
plugins = plugins + list(getPlugins(interface, module))
except ImportError:
pass
return plugins
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