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# SPDX-FileCopyrightText: Copyright (c) 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.
import os
from typing import List
from huggingface_hub import snapshot_download
def download_models(models: List[str], destination_root: str):
"""
Download models from Hugging Face Hub and save them in org/project structure.
Args:
models: List of model IDs in format 'org/project'
destination_root: Root directory where models will be saved
"""
for model_id in models:
model_id, revision = model_id.split(":") if ":" in model_id else (model_id, None)
print(f"Downloading {model_id}...")
# Create the full path for the model
model_path = os.path.join(destination_root, model_id)
try:
# Download the model
snapshot_download(
repo_id=model_id,
local_dir=model_path,
revision=revision,
)
print(f"Successfully downloaded {model_id} to {model_path}")
except Exception as e:
raise RuntimeError(f"Error downloading {model_id}: {str(e)}. Please delete the directory and try again.")
def download_guardrail_checkpoints(destination_root: str):
"""
Download guardrail checkpoints from Hugging Face Hub and save them in org/project structure.
Args:
destination_root: Root directory where checkpoints will be saved
"""
# List of models to download
models_to_download = [
"meta-llama/Llama-Guard-3-8B",
"nvidia/Cosmos-Guardrail1",
]
# Create the destination directory if it doesn't exist
os.makedirs(destination_root, exist_ok=True)
# Download the models
download_models(models_to_download, destination_root)
if __name__ == "__main__":
download_guardrail_checkpoints("checkpoints")
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