mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-11-25 01:25:04 +08:00
87 lines
2.3 KiB
Python
87 lines
2.3 KiB
Python
import importlib
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import os
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import re
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from typing import Any, Set, Optional
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from .log import logger
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class Plugin:
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__slots__ = ('module', 'name', 'usage')
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def __init__(self, module: Any,
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name: Optional[str] = None,
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usage: Optional[Any] = None):
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self.module = module
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self.name = name
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self.usage = usage
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_plugins: Set[Plugin] = set()
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def load_plugin(module_name: str) -> bool:
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"""
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Load a module as a plugin.
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:param module_name: name of module to import
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:return: successful or not
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"""
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try:
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module = importlib.import_module(module_name)
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name = getattr(module, '__plugin_name__', None)
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usage = getattr(module, '__plugin_usage__', None)
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_plugins.add(Plugin(module, name, usage))
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logger.info(f'Succeeded to import "{module_name}"')
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return True
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except Exception as e:
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logger.error(f'Failed to import "{module_name}", error: {e}')
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logger.exception(e)
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return False
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def load_plugins(plugin_dir: str, module_prefix: str) -> int:
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"""
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Find all non-hidden modules or packages in a given directory,
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and import them with the given module prefix.
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:param plugin_dir: plugin directory to search
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:param module_prefix: module prefix used while importing
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:return: number of plugins successfully loaded
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"""
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count = 0
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for name in os.listdir(plugin_dir):
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path = os.path.join(plugin_dir, name)
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if os.path.isfile(path) and \
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(name.startswith('_') or not name.endswith('.py')):
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continue
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if os.path.isdir(path) and \
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(name.startswith('_') or not os.path.exists(
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os.path.join(path, '__init__.py'))):
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continue
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m = re.match(r'([_A-Z0-9a-z]+)(.py)?', name)
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if not m:
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continue
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if load_plugin(f'{module_prefix}.{m.group(1)}'):
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count += 1
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return count
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def load_builtin_plugins() -> int:
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"""
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Load built-in plugins distributed along with "nonebot" package.
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"""
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plugin_dir = os.path.join(os.path.dirname(__file__), 'plugins')
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return load_plugins(plugin_dir, 'nonebot.plugins')
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def get_loaded_plugins() -> Set[Plugin]:
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"""
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Get all plugins loaded.
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:return: a set of Plugin objects
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"""
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return _plugins
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