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import os, tarfile |
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from pathlib import Path |
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def _safe_members(tf, prefix): |
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if not prefix.endswith('/'): |
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prefix += '/' |
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for m in tf.getmembers(): |
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if not m.name.startswith(prefix): |
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continue |
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p = Path(m.name) |
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if any(part == '..' for part in p.parts) or p.is_absolute(): |
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continue |
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yield m |
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def ensure_tar_tree(repo_id: str, root: str, *, token: str | None = None, max_workers: int = 4): |
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os.environ.setdefault('HF_HUB_ENABLE_HF_TRANSFER', '1') |
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from huggingface_hub import snapshot_download |
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base = Path(snapshot_download(repo_id=repo_id, repo_type='dataset', |
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allow_patterns=[f'{root}.tar', 'index.jsonl', 'README.md', 'LICENSE'], |
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resume_download=True, token=token, max_workers=max_workers)) |
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root_dir = base / root |
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if root_dir.exists(): |
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return root_dir |
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tar_path = base / f'{root}.tar' |
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if not tar_path.exists(): |
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raise FileNotFoundError(f'Expected {tar_path} in snapshot') |
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with tarfile.open(tar_path, 'r') as tf: |
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tf.extractall(base, members=_safe_members(tf, root)) |
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return root_dir |
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