fix: fall back to completed manifests when depot.config lists none

tools/linuxfs/overlay/usr/local/bin/droiddeck-steam-games

@@ -305,7 +305,7 @@ def installed_build(folder, appid, installdir):
         depots = config_depots((folder / ".DepotDownloader/depot.config").read_bytes())
     except OSError:
         depots = None
-    if depots is None:
+    if not depots:
         depots = completed_depots(folder / ".DepotDownloader/completed")
     if not depots or not all(0 < depot < 0x80000000 and 0 < gid < 0x7FFFFFFFFFFFFFFF for depot, gid in depots):
         return None

tools/tests/test_steam_games.py

@@ -261,6 +261,8 @@ class ImportsTest(unittest.TestCase):
         (config.parent / 'completed').mkdir()
         (config.parent / 'completed/43_98.manifest').write_bytes(b'x')
         self.assertIn('"manifest" "98"', imports.installed_build(self.folder, 42, 'DroidDeck-42'))
+        config.write_text(json.dumps({'installedManifestIDs': {}}))
+        self.assertIn('"manifest" "98"', imports.installed_build(self.folder, 42, 'DroidDeck-42'))
 
     def test_completed_manifests_record_installed_depots(self):
         completed = self.folder / '.DepotDownloader/completed'