102 lines
4.1 KiB
Python
102 lines
4.1 KiB
Python
import glob, imp, inspect, os, sys, uuid
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class ModuleManager(object):
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def __init__(self, bot, events, exports, directory="modules"):
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self.bot = bot
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self.events = events
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self.exports = exports
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self.directory = directory
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self.modules = {}
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self.waiting_requirement = {}
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def list_modules(self):
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return sorted(glob.glob(os.path.join(self.directory, "*.py")))
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def _module_name(self, path):
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return os.path.basename(path).rsplit(".py", 1)[0].lower()
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def _module_path(self, name):
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return os.path.join(self.directory, "%s.py" % name)
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def _load_module(self, name):
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path = self._module_path(name)
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with open(path) as module_file:
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while True:
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line = module_file.readline().strip()
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line_split = line.split(" ")
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if line and line.startswith("#--"):
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# this is a hashflag
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if line == "#--ignore":
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# nope, ignore this module.
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return None
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elif line_split[0] == "#--require-config" and len(
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line_split) > 1:
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if not line_split[1].lower() in self.bot.config or not self.bot.config[
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line_split[1].lower()]:
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# nope, required config option not present.
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return None
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elif line_split[0] == "#--require-module" and len(
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line_split) > 1:
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if not "bitbot_%s" % line_split[1].lower() in sys.modules:
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if not line_split[1].lower() in self.waiting_requirement:
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self.waiting_requirement[line_split[1].lower()] = set([])
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self.waiting_requirement[line_split[1].lower()].add(path)
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return None
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else:
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break
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module = imp.load_source(name, path)
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if not hasattr(module, "Module"):
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raise ImportError("module '%s' doesn't have a Module class.")
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if not inspect.isclass(module.Module):
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raise ImportError("module '%s' has a Module attribute but it is not a class.")
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context = str(uuid.uuid4())
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module_object = module.Module(self.bot, self.events.new_context(
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context), self.exports.new_context(context))
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if not hasattr(module_object, "_name"):
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module_object._name = name.title()
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module_object._context = context
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module_object._import_name = name
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assert not module_object._name in self.modules, (
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"module name '%s' attempted to be used twice.")
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return module_object
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def load_module(self, name):
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try:
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module = self._load_module(name)
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except ImportError as e:
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self.bot.log.error("failed to load module \"%s\": %s",
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[name, e.msg])
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return
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if module:
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self.modules[module._import_name] = module
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if name in self.waiting_requirement:
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for requirement_name in self.waiting_requirement:
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self.load_module(requirement_name)
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self.bot.log.info("Module '%s' loaded", [name])
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else:
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self.bot.log.error("Module '%s' not loaded", [name])
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def load_modules(self, whitelist=None):
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for path in self.list_modules():
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name = self._module_name(path)
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if whitelist == None or name in whitelist:
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self.load_module(name)
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def unload_module(self, name):
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module = self.modules[name]
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del self.modules[name]
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context = module._context
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self.events.purge_context(context)
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self.exports.purge_context(context)
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del sys.modules[name]
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references = sys.getrefcount(module)
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del module
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references -= 1 # 'del module' removes one reference
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references -= 1 # one of the refs is from getrefcount
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self.bot.log.info("Module '%s' unloaded (%d reference%s)",
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[name, references, "" if references == 1 else "s"])
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