Replaced txt by Loaders

autoload/save_manager.gd

@@ -178,6 +178,30 @@ func load_data(filename: String, password: String) -> Dictionary:
     return E.decode(data)
 
 
+## Preserve a structurally readable but game-incompatible save, then allow the
+## already initialized fresh session to use the original filename.
+func archive_incompatible_save(filename: String) -> bool:
+    flush_saves()
+    var path: String = save_directory.path_join(E.add(filename, ".adventure"))
+    if not FileAccess.file_exists(path):
+        blocked_saves.erase(filename)
+        last_error = ""
+        return true
+    var archive: String = E.add(path, ".incompatible.bak")
+    var index: int = 0
+    while FileAccess.file_exists(archive):
+        index = E.add(index, 1)
+        archive = E.add(E.add(path, ".incompatible.bak."), str(index))
+    var error: Error = DirAccess.rename_absolute(path, archive)
+    if E.ne(error, OK):
+        blocked_saves[filename] = true
+        return _fail(E.add("Cannot archive incompatible save: ", error_string(error)))
+    blocked_saves.erase(filename)
+    last_error = ""
+    push_warning(E.add(E.add("Incompatible save preserved at ", archive), "; starting a new game."))
+    return true
+
+
 static func _number(value: Variant, whole: bool = false, nonnegative: bool = true) -> bool:
     return E.numeric(value) and E.finite(value) and (not value is float or absf(value) < 1e28) and (not whole or E.eq(value, E.floor_value(value))) and (not nonnegative or E.ge(value, 0))