export_aseprite_palettes.py

#!/usr/bin/env python3
"""Export every installed Aseprite GPL palette into Bilta Gilata1 JSON."""

import json
from pathlib import Path

SOURCE = Path("/Applications/Aseprite.app/Contents/Resources/data")
OUTPUT = Path(__file__).with_name("palettes.json")


def parse(path):
    colors = []
    for line in path.read_text(errors="replace").splitlines():
        fields = line.strip().split()
        if len(fields) >= 3 and all(field.isdigit() for field in fields[:3]):
            colors.append("#" + "".join(f"{min(255, int(value)):02x}" for value in fields[:3]))
    return colors


def main():
    palettes = {}
    for path in sorted(SOURCE.rglob("*.gpl")):
        colors = parse(path)
        if colors:
            key = path.stem.lower().replace("_", "-").replace(" ", "-")
            palettes[key] = {"colors": colors, "source": str(path.relative_to(SOURCE))}
    OUTPUT.write_text(json.dumps({"format": "bilta-gilata1-palettes", "count": len(palettes), "palettes": palettes}, indent=2))
    print(f"Exported {len(palettes)} Aseprite palettes to {OUTPUT}")


if __name__ == "__main__":
    main()