162 lines
5.6 KiB
Python
162 lines
5.6 KiB
Python
import os
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import re
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import glob
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import collections
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import traceback
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from watchdog.observers import Observer
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from watchdog.tricks import Trick
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from core import main
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def make_signature(f):
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return f.func_code.co_filename, f.func_name, f.func_code.co_firstlineno
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def format_plug(plug, kind='', lpad=0):
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out = ' ' * lpad + '{}:{}:{}'.format(*make_signature(plug[0]))
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if kind == 'command':
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out += ' ' * (50 - len(out)) + plug[1]['name']
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if kind == 'event':
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out += ' ' * (50 - len(out)) + ', '.join(plug[1]['events'])
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if kind == 'regex':
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out += ' ' * (50 - len(out)) + plug[1]['regex']
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return out
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class PluginLoader(object):
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def __init__(self, bot):
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self.observer = Observer()
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self.path = os.path.abspath("plugins")
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self.bot = bot
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self.event_handler = PluginEventHandler(self, patterns=["*.py"])
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self.observer.schedule(self.event_handler, self.path, recursive=False)
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self.observer.start()
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self.load_all()
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def stop(self):
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"""shuts down the plugin reloader"""
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self.observer.stop()
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def load_all(self):
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"""loads plugins from all files in the plugins folder"""
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files = set(glob.glob(os.path.join(self.path, '*.py')))
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for f in files:
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self.load_file(f, loaded_all=True)
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self.rebuild()
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def load_file(self, path, loaded_all=False):
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"""loads (or reloads) all valid plugins from a specified file"""
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filename = os.path.basename(path)
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title = os.path.splitext(filename)[0]
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disabled = self.bot.config.get('disabled_plugins', [])
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if title in disabled:
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self.bot.logger.info("Did not load plugins from: {} (plugin disabled)".format(filename))
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return None
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# compile the file and eval it in a namespace
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try:
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code = compile(open(path, 'U').read(), filename, 'exec')
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namespace = {}
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eval(code, namespace)
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except Exception:
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self.bot.logger.error("Error compiling {}:".format(filename))
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self.bot.logger.error(traceback.format_exc())
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return
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# remove plugins already loaded from this file
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for name, data in self.bot.plugins.iteritems():
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self.bot.plugins[name] = [x for x in data
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if x[0]._filename != filename]
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# stop all currently running instances of the plugins from this file
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for func, handler in list(self.bot.threads.iteritems()):
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if func._filename == filename:
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handler.stop()
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del self.bot.threads[func]
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# find objects with hooks in the plugin namespace
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# TODO: kill it with fire, kill it all
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for obj in namespace.itervalues():
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if hasattr(obj, '_hook'): # check for magic
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if obj._thread:
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# TODO: pretty sure this is broken
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self.bot.threads[obj] = main.Handler(self.bot, obj)
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for type, data in obj._hook:
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# add plugin to the plugin list
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self.bot.plugins[type] += [data]
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if not loaded_all:
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self.bot.logger.info("Loaded plugin: {} ({})".format(format_plug(data), type))
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# do a rebuild, unless the bot is loading all plugins (rebuild happens after load_all)
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if not loaded_all:
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self.rebuild()
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def unload_file(self, path):
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"""unloads all loaded plugins from a specified file"""
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filename = os.path.basename(path)
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self.bot.logger.info("Unloading plugins from: {}".format(filename))
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# remove plugins loaded from this file
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for plugin_type, plugins in self.bot.plugins.iteritems():
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self.bot.plugins[plugin_type] = [x for x in plugins if x[0]._filename != filename]
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# stop all currently running instances of the plugins from this file
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for func, handler in list(self.bot.threads.iteritems()):
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if func._filename == filename:
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main.handler.stop()
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del self.bot.threads[func]
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self.rebuild()
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def rebuild(self):
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"""rebuilds the cloudbot command and event hook lists"""
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self.bot.commands = {}
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for plugin in self.bot.plugins['command']:
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name = plugin[1]['name'].lower()
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if not re.match(r'^\w+$', name):
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self.bot.logger.error('Invalid command name: "{}" ({})'.format(name, format_plug(plugin)))
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continue
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if name in self.bot.commands:
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self.bot.logger.error('Command already registered: "{}" ({}, {})'.format(name,
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format_plug(self.bot.commands[name]),
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format_plug(plugin)))
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continue
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self.bot.commands[name] = plugin
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self.bot.events = collections.defaultdict(list)
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for func, args in self.bot.plugins['event']:
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for event in args['events']:
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self.bot.events[event].append((func, args))
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class PluginEventHandler(Trick):
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def __init__(self, loader, *args, **kwargs):
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self.loader = loader
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Trick.__init__(self, *args, **kwargs)
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def on_created(self, event):
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self.loader.load_file(event.src_path)
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def on_deleted(self, event):
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self.loader.unload_file(event.src_path)
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def on_modified(self, event):
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self.loader.load_file(event.src_path)
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def on_moved(self, event):
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self.loader.unload_file(event.src_path)
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self.loader.load_file(event.dest_path)
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