Fix Windows TemporaryDirectory issue (#749)

optimum/intel/openvino/modeling.py

@@ -446,6 +446,9 @@ def _from_transformers(
 
         save_dir = TemporaryDirectory()
         save_dir_path = Path(save_dir.name)
+        # This attribute is needed to keep one reference on the temporary directory, since garbage collecting
+        # would end-up removing the directory containing the underlying OpenVINO model
+        cls._model_save_dir_tempdirectory_instance = save_dir
 
         # If load_in_8bit and quantization_config not specified then ov_config is set to None and will be set by default in convert depending on the model size
         if load_in_8bit is None and not quantization_config:

optimum/intel/openvino/modeling_base.py

@@ -366,6 +366,9 @@ def _from_transformers(
 
         save_dir = TemporaryDirectory()
         save_dir_path = Path(save_dir.name)
+        # This attribute is needed to keep one reference on the temporary directory, since garbage collecting
+        # would end-up removing the directory containing the underlying OpenVINO model
+        cls._model_save_dir_tempdirectory_instance = save_dir
 
         # If load_in_8bit and quantization_config not specified then ov_config is set to None and will be set by default in convert depending on the model size
         if load_in_8bit is None and not quantization_config:

optimum/intel/openvino/modeling_base_seq2seq.py

@@ -281,6 +281,10 @@ def _from_transformers(
         save_dir = TemporaryDirectory()
         save_dir_path = Path(save_dir.name)
 
+        # This attribute is needed to keep one reference on the temporary directory, since garbage collecting
+        # would end-up removing the directory containing the underlying OpenVINO model
+        cls._model_save_dir_tempdirectory_instance = save_dir
+
         if task is None:
             task = cls.export_feature
             if use_cache:

optimum/intel/openvino/modeling_decoder.py

@@ -116,7 +116,6 @@ def __init__(
             quantization_config=quantization_config,
             **kwargs,
         )
-
         self.is_dynamic = dynamic_shapes
         use_cache = kwargs.pop("use_cache", True)
         model_has_sinks = model_has_state(self.model)
@@ -256,6 +255,9 @@ def _from_transformers(
 
         save_dir = TemporaryDirectory()
         save_dir_path = Path(save_dir.name)
+        # This attribute is needed to keep one reference on the temporary directory, since garbage collecting
+        # would end-up removing the directory containing the underlying OpenVINO model
+        cls._model_save_dir_tempdirectory_instance = save_dir
 
         if task is None:
             task = cls.export_feature