# Auto-generated by pack_for_huggingface.py
"""One-line unpacker for the DesignVFR HuggingFace release.

After ``huggingface-cli download Tunanzzz/DesignVFR --repo-type dataset``,
run::

    python unpack.py

It will extract every ``*.tar`` / ``*.part-XXX.tar`` next to itself in-place
so that the directory layout matches the paths inside the metadata
jsonl/json (which are anchored on ``${DATASET_ROOT}``).
"""
from __future__ import annotations

import sys
import tarfile
from pathlib import Path


def main():
    root = Path(__file__).resolve().parent
    tars = sorted(root.rglob('*.tar'))
    if not tars:
        print('No .tar files found under', root)
        return
    print(f'Found {len(tars)} tar shard(s) under {root}')
    for t in tars:
        # Each tar is anchored on its parent directory's "image root" -- e.g.
        # synthetic/train.part-001.tar  -> extract into synthetic/train/
        # synthetic/ood_infer.tar       -> extract into synthetic/ood_infer/
        stem = t.name.split('.', 1)[0]   # "train.part-001.tar" -> "train"
        dest = t.parent / stem
        dest.mkdir(parents=True, exist_ok=True)
        print(f'  extracting {t.relative_to(root)}  ->  {dest.relative_to(root)}/')
        with tarfile.open(t, 'r') as f:
            f.extractall(dest)
    print('Done. You can now `export DATASET_ROOT=' + str(root) + '`.')


if __name__ == '__main__':
    main()