[bugfix] saving model without model.name_or_path (#2061)

Summary:

the way models were saved assumed that model.name_or_path was populated
but this is not always the case. I think that if you generate a model
and then immediately quantize it, you'll run into this problem.

This PR relaxes this assumption so that the model can be saved.

TEST PLAN:
ran https://gist.github.com/HDCharles/78c55da388076aa046ee893edfbd9df5

previously you'd get:

huggingface_hub.errors.HFValidationError: Repo id must use alphanumeric
chars, '-', '_' or '.'. The name cannot start or end with '-' or '.' and
the maximum length is 96: ''.

now:

no error

---------

Signed-off-by: HDCharles <charlesdavidhernandez@gmail.com>

Author: HDCharles

src/llmcompressor/pytorch/model_load/helpers.py

@@ -144,7 +144,7 @@ def load_safetensors_state_dict(file_path: str) -> Dict[str, torch.Tensor]:
 def copy_python_files_from_model_cache(model, save_path: str):
     config = model.config
     cache_path = None
-    if hasattr(config, "_name_or_path"):
+    if hasattr(config, "_name_or_path") and len(config._name_or_path.strip()) > 0:
         import os
         import shutil
 

src/llmcompressor/transformers/utils/helpers.py

@@ -57,7 +57,12 @@ def infer_recipe_from_model_path(model_path: Union[str, Path]) -> Optional[str]:
         - Hugging face model ID
     :return: The path to the recipe file if found, None otherwise.
     """
-    model_path = model_path.as_posix() if isinstance(model_path, Path) else model_path
+    model_path = (
+        model_path.as_posix() if isinstance(model_path, Path) else model_path.strip()
+    )
+    if model_path == "":
+        logger.debug("got path_or_name=<empty string>" "unable to find recipe")
+        return None
 
     if os.path.isdir(model_path) or os.path.isfile(model_path):
         # Model path is a local path to the model directory or file