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115 lines
3.5 KiB
115 lines
3.5 KiB
#
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# loader.py
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#
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# Copyright (C) 2011 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Red Hat Author(s): Martin Gracik <mgracik@redhat.com>
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#
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import operator
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import os
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import sys
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from .constants import *
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from .module import Module
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from .moduleset import ModuleSet
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import ethtool
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# set up logging
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import logging
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logging.basicConfig(level=logging.DEBUG)
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log = logging.getLogger('firstboot.loader')
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class Loader:
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def __init__(self):
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self.modlist = []
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def _check_module(self, module):
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# XXX this does not work as expected
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if isinstance(module, Module):
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attrs = ('mode', 'priority', 'sidebarTitle', 'title')
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elif isinstance(module, ModuleSet):
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attrs = ('mode', 'path', 'priority', 'sidebarTitle')
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else:
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return []
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return [a for a in attrs if getattr(module, a, None) is None]
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def _has_network(self):
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return [i for i in ethtool.get_active_devices() if i != 'lo']
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def load_modules(self, module_dir, reconfig=False):
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if not module_dir in sys.path:
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sys.path.append(module_dir)
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modules = [os.path.splitext(f)[0] for f in os.listdir(module_dir)
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if f.endswith('.py')]
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for module in modules:
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log.info('loading module %s', module)
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try:
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imported = __import__(module)
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except ImportError as e:
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log.error('module could not be imported: %s', e)
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continue
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clsobj = getattr(imported, MODCLASS, None)
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if clsobj is None:
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log.error('module does not implement the required class')
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continue
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modobj = clsobj()
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# module sanity check
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missing = self._check_module(modobj)
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if missing:
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log.error('module has missing attributes: %s', str(missing))
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continue
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# skip modules that require network if it's not active
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if not self._has_network and modobj.needsNetwork():
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log.error('module requires active network connection')
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continue
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# skip modules that should only appear in reconfig mode
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if not reconfig and modobj.reconfig:
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log.info('module only available in reconfig mode')
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continue
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# skip hidden modules
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if not modobj.shouldAppear():
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log.info('module is hidden')
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continue
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# skip empty module sets
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if isinstance(modobj, ModuleSet):
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modobj.loadModules(mode=reconfig)
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if not obj.moduleList:
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log.error('module set is empty')
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continue
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# add the module to the list
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self.modlist.append(modobj)
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# sort modules
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self.modlist.sort(key=operator.attrgetter('priority'))
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return self.modlist
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