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0853ae4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | """Check downloaded data files against DATA_MANIFEST.json before using them.
Usage: python verify_data.py [DATA_DIR] (default: data/)"""
import hashlib, json, os, sys
d = sys.argv[1] if len(sys.argv) > 1 else os.path.join(os.path.dirname(os.path.abspath(__file__)), "data")
m = json.load(open(os.path.join(os.path.dirname(os.path.abspath(__file__)), "DATA_MANIFEST.json")))
bad = 0
for name, info in m["files"].items():
p = os.path.join(d, name)
if not os.path.exists(p):
print(f"MISSING {name}"); bad += 1; continue
h = hashlib.sha256()
with open(p, "rb") as f:
for chunk in iter(lambda: f.read(1 << 20), b""):
h.update(chunk)
ok = h.hexdigest() == info["sha256"] and os.path.getsize(p) == info["bytes"]
bad += not ok
print(f"{'OK ' if ok else 'MISMATCH'} {name}")
print(f"{m['data_version']}: {len(m['files']) - bad}/{len(m['files'])} files verified")
sys.exit(1 if bad else 0)
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