nonebot2/nonebot/plugin/load.py
2022-08-08 21:07:36 +08:00

167 lines
5.0 KiB
Python

"""本模块定义插件加载接口。
FrontMatter:
sidebar_position: 1
description: nonebot.plugin.load 模块
"""
import json
import warnings
from types import ModuleType
from typing import Set, Iterable, Optional
import tomlkit
from .plugin import Plugin
from .manager import PluginManager
from . import _managers, get_plugin, _module_name_to_plugin_name
def load_plugin(module_path: str) -> Optional[Plugin]:
"""加载单个插件,可以是本地插件或是通过 `pip` 安装的插件。
参数:
module_path: 插件名称 `path.to.your.plugin`
"""
manager = PluginManager([module_path])
_managers.append(manager)
return manager.load_plugin(module_path)
def load_plugins(*plugin_dir: str) -> Set[Plugin]:
"""导入文件夹下多个插件,以 `_` 开头的插件不会被导入!
参数:
plugin_dir: 文件夹路径
"""
manager = PluginManager(search_path=plugin_dir)
_managers.append(manager)
return manager.load_all_plugins()
def load_all_plugins(
module_path: Iterable[str], plugin_dir: Iterable[str]
) -> Set[Plugin]:
"""导入指定列表中的插件以及指定目录下多个插件,以 `_` 开头的插件不会被导入!
参数:
module_path: 指定插件集合
plugin_dir: 指定文件夹路径集合
"""
manager = PluginManager(module_path, plugin_dir)
_managers.append(manager)
return manager.load_all_plugins()
def load_from_json(file_path: str, encoding: str = "utf-8") -> Set[Plugin]:
"""导入指定 json 文件中的 `plugins` 以及 `plugin_dirs` 下多个插件,以 `_` 开头的插件不会被导入!
参数:
file_path: 指定 json 文件路径
encoding: 指定 json 文件编码
用法:
```json title=plugins.json
{
"plugins": ["some_plugin"],
"plugin_dirs": ["some_dir"]
}
```
```python
nonebot.load_from_json("plugins.json")
```
"""
with open(file_path, "r", encoding=encoding) as f:
data = json.load(f)
plugins = data.get("plugins")
plugin_dirs = data.get("plugin_dirs")
assert isinstance(plugins, list), "plugins must be a list of plugin name"
assert isinstance(plugin_dirs, list), "plugin_dirs must be a list of directories"
return load_all_plugins(set(plugins), set(plugin_dirs))
def load_from_toml(file_path: str, encoding: str = "utf-8") -> Set[Plugin]:
"""导入指定 toml 文件 `[tool.nonebot]` 中的 `plugins` 以及 `plugin_dirs` 下多个插件,以 `_` 开头的插件不会被导入!
参数:
file_path: 指定 toml 文件路径
encoding: 指定 toml 文件编码
用法:
```toml title=pyproject.toml
[tool.nonebot]
plugins = ["some_plugin"]
plugin_dirs = ["some_dir"]
```
```python
nonebot.load_from_toml("pyproject.toml")
```
"""
with open(file_path, "r", encoding=encoding) as f:
data = tomlkit.parse(f.read()) # type: ignore
nonebot_data = data.get("tool", {}).get("nonebot")
if not nonebot_data:
nonebot_data = data.get("nonebot", {}).get("plugins")
if nonebot_data:
warnings.warn(
"[nonebot.plugins] table is deprecated. Use [tool.nonebot] instead.",
DeprecationWarning,
)
else:
raise ValueError("Cannot find '[tool.nonebot]' in given toml file!")
plugins = nonebot_data.get("plugins", [])
plugin_dirs = nonebot_data.get("plugin_dirs", [])
assert isinstance(plugins, list), "plugins must be a list of plugin name"
assert isinstance(plugin_dirs, list), "plugin_dirs must be a list of directories"
return load_all_plugins(plugins, plugin_dirs)
def load_builtin_plugin(name: str) -> Optional[Plugin]:
"""导入 NoneBot 内置插件。
参数:
name: 插件名称
"""
return load_plugin(f"nonebot.plugins.{name}")
def load_builtin_plugins(*plugins: str) -> Set[Plugin]:
"""导入多个 NoneBot 内置插件。
参数:
plugins: 插件名称列表
"""
return load_all_plugins([f"nonebot.plugins.{p}" for p in plugins], [])
def _find_manager_by_name(name: str) -> Optional[PluginManager]:
for manager in reversed(_managers):
if name in manager.plugins or name in manager.searched_plugins:
return manager
def require(name: str) -> ModuleType:
"""获取一个插件的导出内容。
如果为 `load_plugins` 文件夹导入的插件,则为文件(夹)名。
参数:
name: 插件名,即 {ref}`nonebot.plugin.plugin.Plugin.name`。
异常:
RuntimeError: 插件无法加载
"""
plugin = get_plugin(_module_name_to_plugin_name(name))
if not plugin:
manager = _find_manager_by_name(name)
if manager:
plugin = manager.load_plugin(name)
else:
plugin = load_plugin(name)
if not plugin:
raise RuntimeError(f'Cannot load plugin "{name}"!')
return plugin.module