handle decky uninstall to avoid unlaunchable game wrappers

2 files changed, 38 insertions, 3 deletions

diff --git a/py_modules/lsfg_vk/plugin.py b/py_modules/lsfg_vk/plugin.py
index 918c3f8..a1fd40f 100644
--- a/py_modules/lsfg_vk/plugin.py
+++ b/py_modules/lsfg_vk/plugin.py
@@ -34,14 +34,14 @@ class Plugin:
     async def check_lsfg_vk_installed(self):
         return self.installation_service.check_installation()
 
-    def _cleanup_runtime_state(self):
+    def _cleanup_runtime_state(self, preserve_wrapper: bool = False):
         flatpak = self.flatpak_service.remove_plugin_owned_environment()
         if not flatpak.get("success"):
             return flatpak.get("error") or "Could not clean up Flatpak support"
         profiles = self.configuration_service.reset_all_flatpak_configs()
         if not profiles.get("success"):
             return profiles.get("error") or "Could not remove Flatpak profiles"
-        wrapper = self.wrapper_service.purge()
+        wrapper = self.wrapper_service.neutralize() if preserve_wrapper else self.wrapper_service.purge()
         if not wrapper.get("success"):
             return wrapper.get("error") or "Could not remove workaround state"
         return None
@@ -190,7 +190,7 @@ class Plugin:
     async def _uninstall(self):
         decky.logger.info("decky-lsfg-vk plugin being uninstalled")
         try:
-            error = self._cleanup_runtime_state()
+            error = self._cleanup_runtime_state(preserve_wrapper=True)
             if error:
                 decky.logger.warning(f"Preserving lsfg-vk files because uninstall cleanup failed: {error}")
                 return
diff --git a/py_modules/lsfg_vk/wrapper_service.py b/py_modules/lsfg_vk/wrapper_service.py
index 906e55b..30c2323 100644
--- a/py_modules/lsfg_vk/wrapper_service.py
+++ b/py_modules/lsfg_vk/wrapper_service.py
@@ -427,3 +427,38 @@ class WrapperService(BaseService):
                 "error": str(error),
                 "removed_files": removed or None,
             }
+
+    def neutralize(self) -> Dict[str, Any]:
+        """Leave an owned passthrough wrapper for Decky-level uninstall.
+
+        Decky can remove this plugin without giving the frontend a chance to
+        clean Steam launch options first.  Keeping a dependency-free wrapper
+        prevents those options from turning into a broken executable path.
+        """
+        try:
+            with self._lock:
+                _document, sidecar_exists, _ = self._read_document()
+                self._assert_wrapper_owned_or_absent()
+                self._write_file(
+                    self.wrapper_path,
+                    "#!/bin/sh\n"
+                    f"{self.MARKER}\n"
+                    "# Safe passthrough retained for existing Steam launch options.\n"
+                    "exec \"$@\"\n",
+                    0o755,
+                )
+                if sidecar_exists:
+                    self.sidecar_path.unlink()
+            return {
+                "success": True,
+                "message": "Replaced lsfg-vk wrapper with a safe passthrough",
+                "error": None,
+                "removed_files": [str(self.sidecar_path)] if sidecar_exists else [],
+            }
+        except Exception as error:
+            return {
+                "success": False,
+                "message": "",
+                "error": str(error),
+                "removed_files": None,
+            }