منشئ بيان نسخ احتياطي

import argparse
import hashlib
import json
from pathlib import Path


def sha256(path: Path) -> str:
    digest = hashlib.sha256()
    with path.open("rb") as file:
        for chunk in iter(lambda: file.read(1024 * 1024), b""):
            digest.update(chunk)
    return digest.hexdigest()


def build_manifest(root: Path, pattern: str) -> list[dict[str, object]]:
    records = []
    for path in sorted(root.rglob(pattern)):
        if path.is_file():
            records.append({
                "path": path.relative_to(root).as_posix(),
                "size": path.stat().st_size,
                "sha256": sha256(path),
            })
    return records


def main() -> None:
    parser = argparse.ArgumentParser(description="Create a JSON backup manifest without copying files.")
    parser.add_argument("root", type=Path)
    parser.add_argument("output", type=Path)
    parser.add_argument("--glob", default="*")
    args = parser.parse_args()

    manifest = build_manifest(args.root, args.glob)
    args.output.write_text(json.dumps(manifest, indent=2), encoding="utf-8")
    print(f"Wrote {len(manifest)} records to {args.output}")


if __name__ == "__main__":
    main()