Update the plugin dependency install method (#1007)

backend/plugin/requirements.py

@@ -1,6 +1,5 @@
 import os
 import subprocess
-import sys
 
 from importlib.metadata import PackageNotFoundError, distribution
 
@@ -15,61 +14,6 @@ class PluginInstallError(Exception):
     """插件安装错误"""
 
 
-def _ensure_pip_available() -> bool:
-    """确保 pip 在虚拟环境中可用"""
-    try:
-        result = subprocess.run([sys.executable, '-m', 'pip', '--version'], capture_output=True, text=True)
-        if result.returncode == 0:
-            return True
-    except (subprocess.TimeoutExpired, subprocess.SubprocessError, FileNotFoundError):
-        pass
-
-    # 尝试使用 ensurepip
-    try:
-        subprocess.check_call(
-            [sys.executable, '-m', 'ensurepip', '--default-pip'],
-            stdout=subprocess.DEVNULL,
-            stderr=subprocess.DEVNULL,
-        )
-        result = subprocess.run([sys.executable, '-m', 'pip', '--version'], capture_output=True, text=True)
-        if result.returncode == 0:
-            return True
-    except (subprocess.CalledProcessError, subprocess.TimeoutExpired, subprocess.SubprocessError, FileNotFoundError):
-        pass
-
-    # 尝试下载并安装
-    try:
-        import os
-        import tempfile
-
-        import httpx
-
-        try:
-            with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
-                with httpx.Client(timeout=3) as client:
-                    get_pip_url = 'https://bootstrap.pypa.io/get-pip.py'
-                    response = client.get(get_pip_url)
-                    response.raise_for_status()
-                    f.write(response.text)
-                    temp_file = f.name
-        except Exception:  # noqa: ignore
-            return False
-
-        try:
-            subprocess.check_call([sys.executable, temp_file], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
-            result = subprocess.run([sys.executable, '-m', 'pip', '--version'], capture_output=True, text=True)
-            return result.returncode == 0
-        finally:
-            try:
-                os.unlink(temp_file)
-            except OSError:
-                pass
-    except Exception:  # noqa: ignore
-        pass
-
-    return False
-
-
 def get_plugins() -> list[str]:
     """
     获取插件列表
@@ -111,10 +55,7 @@ def install_requirements(plugin: str | None) -> None:  # noqa: C901
 
         if missing_dependencies:
             try:
-                if not _ensure_pip_available():
-                    raise PluginInstallError(f'pip 安装失败，无法继续安装插件 {plugin} 依赖')
-
-                pip_install = [sys.executable, '-m', 'pip', 'install', '-r', requirements_file]
+                pip_install = ['uv', 'pip', 'install', '-r', requirements_file]
                 if settings.PLUGIN_PIP_CHINA:
                     pip_install.extend(['-i', settings.PLUGIN_PIP_INDEX_URL])
 
@@ -149,7 +90,7 @@ def uninstall_requirements(plugin: str) -> None:
     requirements_file = PLUGIN_DIR / plugin / 'requirements.txt'
     if os.path.exists(requirements_file):
         try:
-            pip_uninstall = [sys.executable, '-m', 'pip', 'uninstall', '-r', requirements_file, '-y']
+            pip_uninstall = ['uv', 'pip', 'uninstall', '-r', str(requirements_file), '-y']
             subprocess.check_call(pip_uninstall, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
         except subprocess.CalledProcessError as e:
             raise PluginInstallError(f'插件 {plugin} 依赖卸载失败：{e}') from e