Datasets:
| #!/usr/bin/env python3 | |
| """Verify every payload file against metadata/files.csv and report unexpected files. Standard library only. | |
| Usage: python verify_dataset.py --dataset-root .""" | |
| import argparse, csv, hashlib | |
| from pathlib import Path | |
| UNLISTED = {"metadata/files.csv", "dataset_manifest.json"} | |
| def digest(p): | |
| h = hashlib.sha256() | |
| with open(p, "rb") as f: | |
| for b in iter(lambda: f.read(1 << 24), b""): h.update(b) | |
| return h.hexdigest() | |
| a = argparse.ArgumentParser(); a.add_argument("--dataset-root", type=Path, default=Path.cwd()); root = a.parse_args().dataset_root.resolve() | |
| rows = list(csv.DictReader(open(root / "metadata/files.csv", encoding="utf-8", newline=""))) | |
| fail = [] | |
| for r in rows: | |
| p = root / r["path"] | |
| if not p.is_file(): fail.append("missing: " + r["path"]); continue | |
| if p.stat().st_size != int(r["bytes"]): fail.append("size mismatch: " + r["path"]); continue | |
| if digest(p) != r["sha256"]: fail.append("hash mismatch: " + r["path"]) | |
| actual = {p.relative_to(root).as_posix() for p in root.rglob("*") if p.is_file() and ".git" not in p.parts and ".cache" not in p.parts} | |
| fail += ["unexpected: " + x for x in sorted(actual - {r["path"] for r in rows} - UNLISTED)] | |
| if fail: raise SystemExit("Dataset verification failed:\n" + "\n".join(fail)) | |
| print(f"Verified {len(rows):,} payload files ({sum(int(r['bytes']) for r in rows):,} bytes).") | |