#!/usr/bin/env python3
"""Empacota a pasta de um jogo de pygame como .pgapp (o molde do arquivo do pygbag), de forma deterministica.

  python3 -I pgapp.py <pasta-do-jogo> <saida.pgapp>

O zip leva tudo da pasta sob "assets/" (o main.py fica em assets/main.py), em ordem alfabetica, com data e
permissoes fixas (mesmo sha256 a cada execucao). Ficam de fora __pycache__, *.pyc e arquivos de editor (.swp, ~).
"""
import os
import sys
import zipfile

src, dest = sys.argv[1:]
src = os.path.abspath(src)
if not os.path.isfile(os.path.join(src, "main.py")):
    raise SystemExit(f"main.py nao existe em {src}")

files = {}
for base, dirs, names in os.walk(src):
    dirs[:] = [d for d in dirs if d != "__pycache__"]
    for name in names:
        if name.endswith((".pyc", ".swp", "~")) or name == ".DS_Store":
            continue
        rel = os.path.relpath(os.path.join(base, name), src).replace(os.sep, "/")
        files[f"assets/{rel}"] = os.path.join(base, name)

with zipfile.ZipFile(dest, "w", zipfile.ZIP_DEFLATED, compresslevel=9) as z:
    for arcname in sorted(files):
        info = zipfile.ZipInfo(arcname, (1980, 1, 1, 0, 0, 0))
        info.compress_type = zipfile.ZIP_DEFLATED
        info.external_attr = 0o644 << 16
        info.create_system = 3
        with open(files[arcname], "rb") as fh:
            z.writestr(info, fh.read(), compresslevel=9)