narcextract.py

#!/usr/bin/env python3

import ndspy.narc as narc
import ndspy.lz10 as lz10

from pathlib import Path


def main(name: str):
    decomp = Path("../github/st").resolve()
    extracted = decomp / "extract" / "eur"
    folder_to_process = extracted / "files" / "Map" / name
    narcs: list[Path] = []

    assert decomp.exists()
    assert extracted.exists()
    assert folder_to_process.exists()

    for narc_path in folder_to_process.rglob("*.bin"):
        with narc_path.open("rb") as file:
            start = file.read(0x10)
            file.seek(0)

            if b"NARC" in start:
                narcs.append(narc_path)

    for narc_path in narcs:
        try:
            data = narc.NARC.fromFile(narc_path)
        except ValueError:
            data = narc.NARC(lz10.decompressFromFile(narc_path))

        out_dir = Path(f"./extracted/{name}").resolve()
        out_dir.mkdir(exist_ok=True)

        for i, file in enumerate(data.files):
            out_path = out_dir / narc_path.stem
            out_path.mkdir(exist_ok=True)
            (out_path / f"{narc_path.stem}_file_{i}.bin").write_bytes(file)


if __name__ == "__main__":
    main("f_htown")