programs/stardust-source-hasher/source_hasher.py

import argparse
import hashlib
from typing import List


class Args(argparse.Namespace):
    srcs: List[str]
    out_file: str


def main():
    parser = argparse.ArgumentParser(fromfile_prefix_chars="@")
    parser.add_argument("--out-file", required=True, help="Path to the output file")
    parser.add_argument("srcs", nargs="*", help="Paths of the source files to hash")

    args = parser.parse_args(namespace=Args())

    hasher = hashlib.sha256()

    for filepath in sorted(args.srcs):
        hasher.update(filepath.encode("utf-8"))
        with open(filepath, "rb") as f:
            while chunk := f.read(8192):
                hasher.update(chunk)

    hash_bytes = hasher.digest()[:8]
    hash_int = int.from_bytes(hash_bytes, byteorder="big")
    with open(args.out_file, "w") as f:
        f.write(f"{hash_int:016x}\n")


if __name__ == "__main__":
    main()