| |
| """Restore ICW WebDataset shards to split/identity/image.jpg folders.""" |
|
|
| from __future__ import annotations |
|
|
| import argparse |
| import io |
| import json |
| import tarfile |
| from pathlib import Path |
|
|
|
|
| def main() -> None: |
| parser = argparse.ArgumentParser() |
| parser.add_argument("release", type=Path) |
| parser.add_argument("output", type=Path) |
| args = parser.parse_args() |
| release = args.release.resolve() |
| output = args.output.resolve() |
| output.mkdir(parents=True, exist_ok=True) |
|
|
| manifest = json.loads((release / "manifest.json").read_text(encoding="utf-8")) |
| restored = 0 |
| for shard in manifest["shards"]: |
| pending_key: str | None = None |
| pending_image: bytes | None = None |
| with tarfile.open(release / shard["path"], "r:") as archive: |
| for member in archive: |
| extracted = archive.extractfile(member) |
| if extracted is None: |
| raise RuntimeError(f"Cannot read {member.name}") |
| key = Path(member.name).stem |
| if member.name.endswith(".jpg"): |
| pending_key = key |
| pending_image = extracted.read() |
| elif member.name.endswith(".json"): |
| if pending_key != key or pending_image is None: |
| raise RuntimeError(f"Invalid member order near {member.name}") |
| metadata = json.load(extracted) |
| split = str(metadata["split"]) |
| identity = str(metadata["identity_id"]) |
| image_name = str(metadata["image_filename"]) |
| destination = output / split / identity / image_name |
| destination.parent.mkdir(parents=True, exist_ok=True) |
| destination.write_bytes(pending_image) |
| restored += 1 |
| pending_key = None |
| pending_image = None |
| print(f"restored {shard['path']}") |
| print(f"complete: {restored} images restored to {output}") |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
