scripts/download_ckpts.py

import wget
import os
import argparse
from huggingface_hub import hf_hub_download

def download_model_ckpts(args):
    """
    Download the yolo12n.pt model from a URL and the best.pt model file from a Hugging Face repository.
    """
    # Download yolo12n.pt from GitHub URL
    model_url = args.url
    output_dir = args.output_dir
    raw_output_dir = os.path.join(output_dir, 'raw')  # Subdirectory for wget download
    
    # Extract filename from URL
    filename = model_url.split("/")[-1]
    output_path = os.path.join(raw_output_dir, filename)
    
    # Create directory if it doesn't exist
    os.makedirs(os.path.dirname(output_path), exist_ok=True)
    
    # Download with wget
    wget.download(
        model_url,
        out=output_path,
        bar=wget.bar_adaptive  # Show progress bar
    )
    print(f"\nDownloaded model from {model_url} to {output_path}")

    # Download best.pt from Hugging Face repository
    hf_repo = args.hf_repo
    model_file = "yolo/finetune/runs/license_plate_detector/weights/best.pt"
    
    # Construct output path for Hugging Face file
    hf_output_path = os.path.join(output_dir, "best.pt")
    
    # Create directory if it doesn't exist
    os.makedirs(os.path.dirname(hf_output_path), exist_ok=True)
    
    # Download the specific file from Hugging Face
    downloaded_path = hf_hub_download(
        repo_id=hf_repo,
        filename=model_file,
        local_dir=output_dir,
        local_dir_use_symlinks=False
    )
    print(f"\nDownloaded model file from {hf_repo} to {downloaded_path}")

if __name__ == "__main__":
    # Set up argument parser
    parser = argparse.ArgumentParser(description="Download yolo12n.pt from URL and best.pt from Hugging Face repository.")
    parser.add_argument('--url', type=str,
                        default='https://github.com/ultralytics/assets/releases/download/v8.3.0/yolo12n.pt',
                        help='URL of the yolo12n.pt model to download via wget')
    parser.add_argument('--output-dir', type=str, default='./ckpts',
                        help='Base output directory for downloaded model files')
    parser.add_argument('--hf-repo', type=str, default='danhtran2mind/license-plate-detector-ocr',
                        help='Hugging Face repository ID to download model file from')

    # Parse arguments
    args = parser.parse_args()
    download_model_ckpts(args)