handle path is None (#303)

Author: mikekgfb

build/builder.py

@@ -96,12 +96,13 @@ def from_args(cls, args):  # -> BuilderArgs:
                 args.pte_path,
                 args.gguf_path,
             ]:
-                path = str(path)
-                if path.endswith("/"):
-                    path = path[:-1]
-                path_basename = os.path.basename(path)
-                if "chat" in path_basename:
-                    is_chat_model = True
+                if path is not None:
+                    path = str(path)
+                    if path.endswith("/"):
+                        path = path[:-1]
+                    path_basename = os.path.basename(path)
+                    if "chat" in path_basename:
+                        is_chat_model = True
 
         return cls(
             checkpoint_dir=checkpoint_dir,