| |
| """Extract one LANTERN open-loop route by canonical ID.""" |
|
|
| import argparse |
| import json |
| import tarfile |
| from pathlib import Path |
|
|
| parser = argparse.ArgumentParser() |
| parser.add_argument("canonical_id") |
| parser.add_argument("--root", type=Path, default=Path(__file__).resolve().parents[1]) |
| parser.add_argument("--output", type=Path, required=True) |
| args = parser.parse_args() |
|
|
| manifest = args.root / "openloop" / "manifest.jsonl" |
| record = None |
| for line in manifest.read_text(encoding="utf-8").splitlines(): |
| candidate = json.loads(line) |
| if candidate["canonical_id"] == args.canonical_id: |
| record = candidate |
| break |
| if record is None: |
| raise SystemExit(f"Unknown canonical ID: {args.canonical_id}") |
|
|
| archive = args.root / record["archive"] |
| prefix = record["member_prefix"].rstrip("/") + "/" |
| args.output.mkdir(parents=True, exist_ok=True) |
| with tarfile.open(archive, "r") as stream: |
| members = [member for member in stream.getmembers() if member.name == prefix[:-1] or member.name.startswith(prefix)] |
| output_root = args.output.resolve() |
| for member in members: |
| target = (output_root / member.name).resolve() |
| if output_root not in target.parents and target != output_root: |
| raise SystemExit(f"Unsafe archive member: {member.name}") |
| stream.extractall(args.output, members=members) |
| print(args.output / record["member_prefix"]) |
|
|
