chore: import upstream snapshot with attribution

demo/Diffusion/demo_diffusion/path/dd_path.py

@@ -0,0 +1,50 @@
+#
+# SPDX-FileCopyrightText: Copyright (c) 1993-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Define a data structure for storing various paths used in DemoDiffusion.
+"""
+
+import dataclasses
+import os
+from typing import Dict
+
+
+@dataclasses.dataclass
+class DDPath:
+    """Data class that stores various paths used in DemoDiffusion."""
+
+    model_name_to_optimized_onnx_path: Dict[str, str] = dataclasses.field(default_factory=dict)
+    model_name_to_engine_path: Dict[str, str] = dataclasses.field(default_factory=dict)
+
+    # Artifact paths.
+    model_name_to_unoptimized_onnx_path: Dict[str, str] = dataclasses.field(default_factory=dict)
+    model_name_to_weights_map_path: Dict[str, str] = dataclasses.field(default_factory=dict)
+    model_name_to_refit_weights_path: Dict[str, str] = dataclasses.field(default_factory=dict)
+    model_name_to_quantized_model_state_dict_path: Dict[str, str] = dataclasses.field(default_factory=dict)
+
+    def create_directory(self) -> None:
+        """Create directories for all paths, if they do not exist."""
+        all_paths = [value for name_to_path in dataclasses.astuple(self) for value in name_to_path.values()]
+
+        for path in all_paths:
+            directory = os.path.dirname(path)
+
+            # If `path` does not have a directory component, `directory` will be an empty string.
+            # Only proceed if `directory` is non-empty.
+            if directory:
+                os.makedirs(directory, exist_ok=True)