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import os
from configparser import ConfigParser
import inspect
import traceback
class PluginConfig(ConfigParser):
def __init__(self, filename):
ConfigParser.__init__(self)
self.__config_file__ = filename
self.read()
def read(self):
"""Read the config file"""
ConfigParser.read(self, self.__config_file__)
def write(self):
"""Write the config to the disk"""
try:
fp = open(self.__config_file__, 'w')
ConfigParser.write(self, fp)
fp.close()
return True
except IOError:
return False
class SafetyMetaclass(type):
# A hack
core = None
@staticmethod
def safe_func(f):
def helper(*args, **kwargs):
try:
return f(*args, **kwargs)
except:
if inspect.stack()[1][1] == inspect.getfile(f):
raise
elif SafetyMetaclass.core:
SafetyMetaclass.core.information(traceback.format_exc())
return None
return helper
def __new__(meta, name, bases, class_dict):
for k, v in class_dict.items():
if inspect.isfunction(v):
class_dict[k] = SafetyMetaclass.safe_func(v)
return type.__new__(meta, name, bases, class_dict)
class BasePlugin(object, metaclass=SafetyMetaclass):
"""
Class that all plugins derive from. Any methods beginning with command_
are interpreted as a command and beginning with on_ are interpreted as
event handlers
"""
def __init__(self, plugin_manager, core, plugins_conf_dir):
self.core = core
# More hack; luckily we'll never have more than one core object
SafetyMetaclass.core = core
self.plugin_manager = plugin_manager
conf = os.path.join(plugins_conf_dir, self.__module__+'.cfg')
self.config = PluginConfig(conf)
self.init()
def init(self):
pass
def cleanup(self):
pass
def unload(self):
self.cleanup()
def add_command(self, name, handler, help, completion=None):
return self.plugin_manager.add_command(self.__module__, name, handler, help, completion)
def del_command(self, name):
return self.plugin_manager.del_command(self.__module__, name)
def add_event_handler(self, event_name, handler):
return self.plugin_manager.add_event_handler(self.__module__, event_name, handler)
def del_event_handler(self, event_name, handler):
return self.plugin_manager.del_event_handler(self.__module__, event_name, handler)
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