fix: handle pip install execution in frozen runtime (#4985)

* fix: handle pip install execution in frozen runtime

* fix: harden pip subprocess fallback handling

astrbot/core/utils/pip_installer.py

@@ -5,7 +5,9 @@ import io
 import locale
 import logging
 import os
+import shutil
 import sys
+from pathlib import Path
 
 from astrbot.core.utils.astrbot_path import get_astrbot_site_packages_path
 
@@ -34,6 +36,28 @@ def _is_frozen_runtime() -> bool:
     return bool(getattr(sys, "frozen", False))
 
 
+def _get_pip_subprocess_executable() -> str | None:
+    candidates = [
+        getattr(sys, "_base_executable", None),
+        sys.executable,
+        shutil.which("python3"),
+        shutil.which("python"),
+    ]
+
+    for candidate in candidates:
+        if not candidate:
+            continue
+
+        candidate_path = Path(candidate)
+        with contextlib.suppress(OSError):
+            candidate_path = candidate_path.resolve()
+
+        if candidate_path.is_file() and os.access(candidate_path, os.X_OK):
+            return str(candidate_path)
+
+    return None
+
+
 def _get_pip_main():
     try:
         from pip._internal.cli.main import main as pip_main
@@ -92,13 +116,26 @@ class PipInstaller:
 
         logger.info(f"Pip 包管理器: pip {' '.join(args)}")
         result_code = None
-        if _is_frozen_runtime():
-            result_code = await self._run_pip_in_process(args)
-        else:
+
+        subprocess_executable = _get_pip_subprocess_executable()
+        if subprocess_executable:
             try:
-                result_code = await self._run_pip_subprocess(args)
-            except FileNotFoundError:
-                result_code = await self._run_pip_in_process(args)
+                result_code = await self._run_pip_subprocess(
+                    subprocess_executable, args
+                )
+            except OSError as exc:
+                logger.warning(
+                    "Failed to launch pip subprocess (%r). Falling back to in-process pip: %s",
+                    subprocess_executable,
+                    exc,
+                )
+        else:
+            logger.debug(
+                "No suitable Python executable found for pip subprocess; using in-process pip"
+            )
+
+        if result_code is None:
+            result_code = await self._run_pip_in_process(args)
 
         if result_code != 0:
             raise Exception(f"安装失败，错误码：{result_code}")
@@ -107,9 +144,9 @@ class PipInstaller:
             sys.path.insert(0, target_site_packages)
         importlib.invalidate_caches()
 
-    async def _run_pip_subprocess(self, args: list[str]) -> int:
+    async def _run_pip_subprocess(self, executable: str, args: list[str]) -> int:
         process = await asyncio.create_subprocess_exec(
-            sys.executable,
+            executable,
             "-m",
             "pip",
             *args,