import imp import os import sys from config import config from gettext import gettext as _ plugins_dir = config.get('plugins_dir', '') plugins_dir = plugins_dir or\ os.path.join(os.environ.get('XDG_DATA_HOME') or\ os.path.join(os.environ.get('HOME'), '.local', 'share'), 'poezio', 'plugins') config_home = os.environ.get("XDG_CONFIG_HOME") if not config_home: config_home = os.path.join(os.environ.get('HOME'), '.config') plugins_conf_dir = os.path.join(config_home, 'poezio', 'plugins') try: os.makedirs(plugins_dir) except OSError: pass try: os.makedirs(plugins_conf_dir) except OSError: pass sys.path.append(plugins_dir) class PluginManager(object): def __init__(self, core): self.core = core self.modules = {} # module name -> module object self.plugins = {} # module name -> plugin object self.commands = {} # module name -> dict of commands loaded for the module self.event_handlers = {} # module name -> list of event_name/handler pairs loaded for the module def load(self, name): if name in self.plugins: self.unload(name) try: if name in self.modules: imp.acquire_lock() module = imp.reload(self.modules[name]) imp.release_lock() else: file, filename, info = imp.find_module(name, [plugins_dir]) imp.acquire_lock() module = imp.load_module(name, file, filename, info) imp.release_lock() except Exception as e: import traceback self.core.information(_("Could not load plugin: ") + traceback.format_exc(), 'Error') return finally: if imp.lock_held(): imp.release_lock() self.modules[name] = module self.commands[name] = {} self.event_handlers[name] = [] self.plugins[name] = module.Plugin(self, self.core, plugins_conf_dir) self.core.information('Plugin %s loaded' % name, 'Info') def unload(self, name): if name in self.plugins: try: for command in self.commands[name].keys(): del self.core.commands[command] for event_name, handler in self.event_handlers[name]: self.del_event_handler(name, event_name, handler) self.plugins[name].unload() del self.plugins[name] del self.commands[name] del self.event_handlers[name] self.core.information('Plugin %s unloaded' % name, 'Info') except Exception as e: import traceback self.core.information(_("Could not unload plugin (may not be safe to try again): ") + traceback.format_exc()) def del_command(self, module_name, name): if name in self.commands[module_name]: del self.commands[module_name][name] if name in self.core.commands: del self.core.commands[name] def add_command(self, module_name, name, handler, help, completion=None): if name in self.core.commands: raise Exception(_("Command '%s' already exists") % (name,)) commands = self.commands[module_name] commands[name] = (handler, help, completion) self.core.commands[name] = (handler, help, completion) def add_event_handler(self, module_name, event_name, handler, position=0): eh = self.event_handlers[module_name] eh.append((event_name, handler)) if event_name in self.core.events.events: self.core.events.add_event_handler(event_name, handler, position) else: self.core.xmpp.add_event_handler(event_name, handler) def del_event_handler(self, module_name, event_name, handler): if event_name in self.core.events.events: self.core.events.del_event_handler(None, handler) else: self.core.xmpp.del_event_handler(event_name, handler) eh = self.event_handlers[module_name] eh = list(filter(lambda e : e != (event_name, handler), eh)) def completion_load(self, the_input): """ completion function that completes the name of the plugins, from all .py files in plugins_dir """ try: names = os.listdir(plugins_dir) except OSError as e: self.core.information(_('Completion failed: %s' % e), 'Error') return plugins_files = [name[:-3] for name in names if name.endswith('.py')] return the_input.auto_completion(plugins_files, '') def completion_unload(self, the_input): """ completion function that completes the name of the plugins that are loaded """ return the_input.auto_completion(list(self.plugins.keys()), '')