Feature: 添加用于动态继承支持适配器数据的方法

nonebot/plugin/__init__.py

@@ -134,3 +134,4 @@ def get_available_plugin_names() -> Set[str]:
 from .load import load_all_plugins as load_all_plugins
 from .load import load_builtin_plugin as load_builtin_plugin
 from .load import load_builtin_plugins as load_builtin_plugins
+from .load import inherit_supported_adapters as inherit_supported_adapters

nonebot/plugin/load.py

@@ -182,3 +182,39 @@ def require(name: str) -> ModuleType:
     if not plugin:
         raise RuntimeError(f'Cannot load plugin "{name}"!')
     return plugin.module
+
+
+def inherit_supported_adapters(*names: str) -> Optional[Set[str]]:
+    """获取已加载插件的适配器支持状态集合。
+
+    如果传入了多个插件名称，返回值会自动取交集。
+
+    参数:
+        names: 插件名称列表。
+
+    异常:
+        RuntimeError: 插件未加载
+        ValueError: 插件缺少元数据
+    """
+    final_supported: Optional[Set[str]] = None
+
+    for name in names:
+        plugin = get_plugin(_module_name_to_plugin_name(name))
+        if plugin is None:
+            raise RuntimeError(f'Plugin "{name}" is not loaded!')
+        meta = plugin.metadata
+        if meta is None:
+            raise ValueError(f'Plugin "{name}" has no metadata!')
+        support = meta.supported_adapters
+        if support is None:
+            continue
+        final_supported = (
+            support if final_supported is None else (final_supported & support)
+        )
+
+    return final_supported and {
+        f"nonebot.adapters.{adapter_name[1:]}"
+        if adapter_name.startswith("~")
+        else adapter_name
+        for adapter_name in final_supported
+    }

tests/plugins/metadata_2.py

@@ -0,0 +1,11 @@
+from nonebot.plugin import PluginMetadata
+
+__plugin_meta__ = PluginMetadata(
+    name="测试插件2",
+    description="测试继承适配器",
+    usage="无法使用",
+    type="application",
+    homepage="https://nonebot.dev",
+    supported_adapters={"~onebot.v11", "~onebot.v12"},
+    extra={"author": "NoneBot"},
+)

tests/test_plugin/test_load.py

@@ -6,7 +6,7 @@
 import pytest
 
 import nonebot
-from nonebot.plugin import Plugin, PluginManager, _managers
+from nonebot.plugin import Plugin, PluginManager, _managers, inherit_supported_adapters
 
 
 @pytest.mark.asyncio
@@ -147,3 +147,35 @@ async def test_plugin_metadata():
     }
 
     assert plugin.metadata.get_supported_adapters() == {FakeAdapter}
+
+
+@pytest.mark.asyncio
+async def test_inherit_supported_adapters():
+    with pytest.raises(RuntimeError):
+        inherit_supported_adapters("some_plugin_not_exist")
+
+    with pytest.raises(ValueError, match="has no metadata!"):
+        inherit_supported_adapters("export")
+
+    echo = nonebot.get_plugin("echo")
+    assert echo
+    assert echo.metadata
+    assert inherit_supported_adapters("echo") is None
+
+    plugin_1 = nonebot.get_plugin("metadata")
+    assert plugin_1
+    assert plugin_1.metadata
+    assert inherit_supported_adapters("metadata") == {
+        "nonebot.adapters.onebot.v11",
+        "plugins.metadata:FakeAdapter",
+    }
+
+    plugin_2 = nonebot.get_plugin("metadata_2")
+    assert plugin_2
+    assert plugin_2.metadata
+    assert inherit_supported_adapters("metadata", "metadata_2") == {
+        "nonebot.adapters.onebot.v11"
+    }
+    assert inherit_supported_adapters("metadata", "echo", "metadata_2") == {
+        "nonebot.adapters.onebot.v11"
+    }