component conferences: Clean stale Galène process if any before launching a new one.

libervia/backend/plugins/plugin_comp_conferences/__init__.py

@@ -417,6 +417,10 @@ class ConferencesComponent:
         galene_static_path = galene_path.parent / "static"
         self.galene_group_path = galene_data_path / "groups"
         self.galene_group_path.mkdir(0o700, parents=True, exist_ok=True)
+        pid_file = G.config.common.pid_dir / "galene.pid"
+        # We check that we don't have a stale process from a previous run, and kill it.
+        # This can happen on crash/unclean exit of backend.
+        async_process.kill_stale_process(pid_file, galene_data_path)
         env = os.environ
         if self.verbose >= 2:
             # We activate Galène debug logs on ICE candidates.
@@ -434,6 +438,7 @@ class ConferencesComponent:
                 path=str(galene_data_path),
                 verbose=bool(self.verbose),
                 env=env,
+                pid_file=pid_file,
             )
         except Exception:
             log.exception("Can't start Galene.")