| |
| import argparse |
| import json |
| import tarfile |
| from pathlib import Path |
|
|
| parser = argparse.ArgumentParser() |
| parser.add_argument("--repo-root", type=Path, default=Path(__file__).resolve().parents[1]) |
| parser.add_argument("--annotation", type=Path, required=True) |
| parser.add_argument("--output-root", type=Path, required=True) |
| args = parser.parse_args() |
|
|
| rows_by_tar = {} |
| with args.annotation.open("r", encoding="utf-8") as handle: |
| for line in handle: |
| if not line.strip(): |
| continue |
| row = json.loads(line) |
| rows_by_tar.setdefault(row["metadata"]["tar"], []).append(row) |
|
|
| written = 0 |
| for relative_tar, rows in sorted(rows_by_tar.items()): |
| with tarfile.open(args.repo_root / relative_tar) as archive: |
| for row in rows: |
| for output_key, member_key in (("source_views", "source_member"), ("target_view", "target_member")): |
| relative_output = row[output_key][0] if output_key == "source_views" else row[output_key] |
| output = args.output_root / relative_output |
| output.parent.mkdir(parents=True, exist_ok=True) |
| extracted = archive.extractfile(row["metadata"][member_key]) |
| if extracted is None: |
| raise FileNotFoundError(row["metadata"][member_key]) |
| output.write_bytes(extracted.read()) |
| written += 1 |
| print(f"materialized {written} images under {args.output_root}") |
|
|
