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#!/usr/bin/python
#
# Copyright (C) 2013 Simo Sorce <simo@redhat.com>
#
# see file 'COPYING' for use and warranty information
#
# 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/>.
import os
import imp
import cherrypy
import inspect
from ipsilon.util.data import Store
class Plugins(object):
def __init__(self, path=None):
if path is None:
self._path = os.getcwd()
else:
self._path = path
self._providers_tree = None
def _load_class(self, tree, class_type, file_name):
cherrypy.log.error('Check module %s for class %s' % (file_name,
class_type))
name, ext = os.path.splitext(os.path.split(file_name)[-1])
try:
if ext.lower() == '.py':
mod = imp.load_source(name, file_name)
#elif ext.lower() == '.pyc':
# mod = imp.load_compiled(name, file_name)
else:
return
except Exception, e: # pylint: disable=broad-except
cherrypy.log.error('Failed to load "%s" module: [%s]' % (name, e))
return
if hasattr(mod, class_type):
instance = getattr(mod, class_type)()
public_name = getattr(instance, 'name', name)
tree[public_name] = instance
cherrypy.log.error('Added module %s as %s' % (name, public_name))
def _load_classes(self, tree, path, class_type):
files = None
try:
files = os.listdir(path)
except Exception, e: # pylint: disable=broad-except
cherrypy.log.error('No modules in %s: [%s]' % (path, e))
return
for name in files:
filename = os.path.join(path, name)
self._load_class(tree, class_type, filename)
def get_plugins(self, path, class_type):
plugins = dict()
self._load_classes(plugins, path, class_type)
return plugins
class PluginLoader(object):
def __init__(self, baseobj, facility, plugin_type):
(whitelist, config) = Store().get_plugins_config(facility)
if cherrypy.config.get('debug', False):
cherrypy.log('[%s] %s: %s' % (facility, whitelist, config))
if whitelist is None:
whitelist = []
if config is None:
config = dict()
p = Plugins(path=cherrypy.config['base.dir'])
(pathname, dummy) = os.path.split(inspect.getfile(baseobj))
self._plugins = {
'config': config,
'available': p.get_plugins(pathname, plugin_type),
'whitelist': whitelist,
'enabled': []
}
def get_plugin_data(self):
return self._plugins
class PluginObject(object):
def __init__(self):
self.name = None
self._config = None
self._options = None
def get_config_desc(self):
""" The configuration description is a dictionary that provides
A description of the supported configuration options, as well
as the default configuration option values.
The key is the option name, the value is an array of 3 elements:
- description
- option type
- default value
"""
return self._options
def set_config(self, config):
self._config = config
def get_config_value(self, name):
value = None
if self._config:
value = self._config.get(name, None)
if not value:
if self._options:
opt = self._options.get(name, None)
if opt:
value = opt[2]
if cherrypy.config.get('debug', False):
cherrypy.log('[%s] %s: %s' % (self.name, name, value))
return value
def set_config_value(self, option, value):
if not self._config:
self._config = dict()
self._config[option] = value
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