🐛 fix import hook export

nonebot/plugin/__init__.py

@@ -20,6 +20,7 @@ from nonebot.permission import Permission
 from nonebot.typing import T_State, T_StateFactory, T_Handler, T_RuleChecker
 from nonebot.rule import Rule, startswith, endswith, keyword, command, shell_command, ArgumentParser, regex
 
+from .export import Export, export, _export
 from .manager import PluginManager, _current_plugin
 
 if TYPE_CHECKING:
@@ -32,55 +33,9 @@ plugins: Dict[str, "Plugin"] = {}
 """
 PLUGIN_NAMESPACE = "nonebot.loaded_plugins"
 
-_export: ContextVar["Export"] = ContextVar("_export")
-# FIXME: tmp matchers context var will be removed
 _plugin_matchers: Dict[str, Set[Type[Matcher]]] = defaultdict(set)
 
 
-class Export(dict):
-    """
-    :说明:
-
-      插件导出内容以使得其他插件可以获得。
-
-    :示例:
-
-    .. code-block:: python
-
-        nonebot.export().default = "bar"
-
-        @nonebot.export()
-        def some_function():
-            pass
-
-        # this doesn't work before python 3.9
-        # use
-        # export = nonebot.export(); @export.sub
-        # instead
-        # See also PEP-614: https://www.python.org/dev/peps/pep-0614/
-        @nonebot.export().sub
-        def something_else():
-            pass
-    """
-
-    def __call__(self, func, **kwargs):
-        self[func.__name__] = func
-        self.update(kwargs)
-        return func
-
-    def __setitem__(self, key, value):
-        super().__setitem__(key,
-                            Export(value) if isinstance(value, dict) else value)
-
-    def __setattr__(self, name, value):
-        self[name] = Export(value) if isinstance(value, dict) else value
-
-    def __getattr__(self, name):
-        if name not in self:
-            self[name] = Export()
-        return self[name]
-
-
 @dataclass(eq=False)
 class Plugin(object):
     """存储插件信息"""
@@ -966,15 +921,14 @@ def _load_plugin(manager: PluginManager, plugin_name: str) -> Optional[Plugin]:
     if plugin_name.startswith("_"):
         return None
 
-    _export.set(Export())
-
     if plugin_name in plugins:
         return None
 
     try:
         module = manager.load_plugin(plugin_name)
 
-        plugin = Plugin(plugin_name, module, _export.get())
+        plugin = Plugin(plugin_name, module,
+                        getattr(module, "__export__", Export()))
         plugins[plugin_name] = plugin
         logger.opt(
             colors=True).info(f'Succeeded to import "<y>{plugin_name}</y>"')
@@ -1153,19 +1107,6 @@ def get_loaded_plugins() -> Set[Plugin]:
     return set(plugins.values())
 
 
-def export() -> Export:
-    """
-    :说明:
-
-      获取插件的导出内容对象
-
-    :返回:
-
-      - ``Export``
-    """
-    return _export.get()
-
-
 def require(name: str) -> Optional[Export]:
     """
     :说明: