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#
# loader.py
#
# Copyright (C) 2011 Red Hat, 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, see <http://www.gnu.org/licenses/>.
#
# Red Hat Author(s): Martin Gracik <mgracik@redhat.com>
#
import operator
import os
import sys
from .constants import *
from .module import Module
from .moduleset import ModuleSet
import ethtool
# set up logging
import logging
logging.basicConfig(level=logging.DEBUG)
log = logging.getLogger('firstboot.loader')
class Loader:
def __init__(self):
self.modlist = []
def _check_module(self, module):
# XXX this does not work as expected
if isinstance(module, Module):
attrs = ('mode', 'priority', 'sidebarTitle', 'title')
elif isinstance(module, ModuleSet):
attrs = ('mode', 'path', 'priority', 'sidebarTitle')
else:
return []
return [a for a in attrs if getattr(module, a, None) is None]
def _has_network(self):
return [i for i in ethtool.get_active_devices() if i != 'lo']
def load_modules(self, module_dir, reconfig=False):
if not module_dir in sys.path:
sys.path.append(module_dir)
modules = [os.path.splitext(f)[0] for f in os.listdir(module_dir)
if f.endswith('.py')]
for module in modules:
log.info('loading module %s', module)
try:
imported = __import__(module)
except ImportError as e:
log.error('module could not be imported: %s', e)
continue
clsobj = getattr(imported, MODCLASS, None)
if clsobj is None:
log.error('module does not implement the required class')
continue
modobj = clsobj()
# module sanity check
missing = self._check_module(modobj)
if missing:
log.error('module has missing attributes: %s', str(missing))
continue
# skip modules that require network if it's not active
if not self._has_network() and modobj.needsNetwork():
log.error('module requires active network connection')
continue
# skip modules that should only appear in reconfig mode
if not reconfig and modobj.reconfig:
log.info('module only available in reconfig mode')
continue
# skip hidden modules
if not modobj.shouldAppear():
log.info('module is hidden')
continue
# skip empty module sets
if isinstance(modobj, ModuleSet):
modobj.loadModules(mode=reconfig)
if not modobj.moduleList:
log.error('module set is empty')
continue
# add the module to the list
self.modlist.append(modobj)
# sort modules
self.modlist.sort(key=operator.attrgetter('priority'))
return self.modlist