48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
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from functools import wraps
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class _PluginManager(object):
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def __init__(self):
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self._registered_plugins = []
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self._cached_base_callbacks = {}
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self._built_functions = {}
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def register(self, *plugins):
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"""
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Makes it possible to register your plugin.
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"""
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self._registered_plugins.extend(plugins)
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self._build_functions()
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def decorate(self, name=None):
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def decorator(callback):
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@wraps(callback)
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def wrapper(*args, **kwargs):
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return built_functions[public_name](*args, **kwargs)
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public_name = name or callback.__name__
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assert public_name not in self._built_functions
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built_functions = self._built_functions
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built_functions[public_name] = callback
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self._cached_base_callbacks[public_name] = callback
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return wrapper
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return decorator
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def _build_functions(self):
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for name, callback in self._cached_base_callbacks.items():
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for plugin in reversed(self._registered_plugins):
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# Need to reverse so the first plugin is run first.
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try:
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func = getattr(plugin, name)
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except AttributeError:
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pass
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else:
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callback = func(callback)
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self._built_functions[name] = callback
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plugin_manager = _PluginManager()
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