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c8beaf3 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | #!/usr/bin/env python3
"""Copy byte-bearing rows selected by a rows-by-licence TSV from an extracted archive."""
from __future__ import annotations
import argparse
import csv
import hashlib
import shutil
from pathlib import Path
def sha256_file(path: Path) -> str:
digest = hashlib.sha256()
with path.open("rb") as handle:
for chunk in iter(lambda: handle.read(8 * 1024 * 1024), b""):
digest.update(chunk)
return digest.hexdigest()
def main() -> int:
parser = argparse.ArgumentParser()
parser.add_argument("row_list", type=Path)
parser.add_argument("extracted_archive", type=Path)
parser.add_argument("output", type=Path)
args = parser.parse_args()
with args.row_list.open("r", encoding="utf-8", newline="") as handle:
rows = list(csv.DictReader(handle, delimiter="\t"))
copied = 0
for row in rows:
relative = row.get("p5_payload_rel_path", "")
if not relative:
continue
source = (args.extracted_archive / relative).resolve()
root = args.extracted_archive.resolve()
if root not in source.parents or not source.is_file():
raise ValueError(f"unsafe or missing source path: {relative}")
if sha256_file(source) != row["sha256"]:
raise ValueError(f"SHA-256 mismatch: {relative}")
target = args.output / row["component"] / Path(relative).name
target.parent.mkdir(parents=True, exist_ok=True)
shutil.copy2(source, target)
copied += 1
print(f"PASS: copied {copied:,} verified byte-bearing rows")
return 0
if __name__ == "__main__":
raise SystemExit(main())
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