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import gc, glob, imp, inspect, os, sys
class ModuleManager(object):
def __init__(self, bot, directory="modules"):
self.bot = bot
self.directory = directory
self.modules = {}
self.waiting_requirement = {}
def list_modules(self):
return sorted(glob.glob(os.path.join(self.directory, "*.py")))
def module_name(self, filename):
return os.path.basename(filename).rsplit(".py", 1)[0].lower()
def _load_module(self, filename):
name = self.module_name(filename)
whitelist = self.bot.config.get("module_whitelist", [])
if whitelist and name not in whitelist: return
with open(filename) as module_file:
while True:
line = module_file.readline().strip()
line_split = line.split(" ")
if line and line.startswith("#--"):
# this is a hashflag
if line == "#--ignore":
# nope, ignore this module.
return None
elif line_split[0] == "#--require-config" and len(
line_split) > 1:
if not line_split[1].lower() in self.bot.config or not self.bot.config[
line_split[1].lower()]:
# nope, required config option not present.
return None
elif line_split[0] == "#--require-module" and len(
line_split) > 1:
if not "bitbot_%s" % line_split[1].lower() in sys.modules:
if not line_split[1].lower() in self.waiting_requirement:
self.waiting_requirement[line_split[1].lower()] = set([])
self.waiting_requirement[line_split[1].lower()].add(filename)
return None
else:
break
import_name = "bitbot_%s" % name
module = imp.load_source(import_name, filename)
assert hasattr(module, "Module"
), "module '%s' doesn't have a Module class."
assert inspect.isclass(module.Module
), "module '%s' has a Module attribute but it is not a class."
module_object = module.Module(self.bot)
if not hasattr(module_object, "_name"):
module_object._name = name.title()
module_object._is_unloaded = False
module_object._import_name = import_name
assert not module_object._name in self.modules, (
"module name '%s' attempted to be used twice.")
return module_object
def load_module(self, filename):
name = self.module_name(filename)
module = self._load_module(filename)
if module:
self.modules[module._name] = module
if name in self.waiting_requirement:
for filename in self.waiting_requirement:
self.load_module(filename)
sys.stderr.write("module '%s' loaded.\n" % filename)
else:
sys.stderr.write("module '%s' not loaded.\n" % filename)
def load_modules(self):
for filename in self.list_modules():
self.load_module(filename)
def unload_module(self, module):
# this is such a bad idea
module._is_unloaded = True
self.unhook_check(self.bot.events)
if hasattr(module, "_cleanup"):
module._cleanup()
del sys.modules[module._import_name]
del self.modules[module._name]
del module
gc.collect()
def unhook_check(self, event):
for hook in event.get_hooks():
if hasattr(hook.function, "__self__") and hasattr(
hook.function.__self__, "_is_unloaded"
) and hook.function.__self__._is_unloaded:
event._unhook(hook)
for child in event.get_children():
self.unhook_check(event.get_child(child))
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