增加PYPI_PROXY变量，支持用镜像站下载与更新依赖

app/core/config.py

@@ -146,6 +146,8 @@ class Settings(BaseSettings):
     GITHUB_TOKEN: Optional[str] = None
     # Github代理服务器，格式：https://mirror.ghproxy.com/
     GITHUB_PROXY: Optional[str] = ''
+    # pip镜像站点，格式：https://pypi.tuna.tsinghua.edu.cn/simple
+    PIP_PROXY: Optional[str] = ''
     # 大内存模式
     BIG_MEMORY_MODE: bool = False
 

app/helper/plugin.py

@@ -222,7 +222,8 @@ class PluginHelper(metaclass=Singleton):
         # 插件目录下如有requirements.txt则安装依赖
         requirements_file = plugin_dir / "requirements.txt"
         if requirements_file.exists():
-            SystemUtils.execute(f"pip install -r {requirements_file} > /dev/null 2>&1")
+            PIP_PROXY = f" -i {settings.PIP_PROXY} " if settings.PIP_PROXY else ""
+            SystemUtils.execute(f"pip install -r {requirements_file} -i {PIP_PROXY}  > /dev/null 2>&1")
         # 安装成功后统计
         self.install_reg(pid)