#!/usr/bin/env bash
# Gera o trispace.love do TriSpace (G. T. Rogers, Ludum Dare 42, MIT; github.com/gtrogers/ld42) a partir do commit
# 355faae, com um patch nosso (trispace/love11.patch, publicado junto do fonte): o jogo foi escrito para o LOVE 0.10 e
# o player e o LOVE 11.5 (cores de 0 a 1, tipo obrigatorio em newSource, Image:getData e love.filesystem.isFile
# removidos), e o autor avisa que a correcao para o 11 ainda nao foi feita. O patch acrescenta um pequeno adaptador no
# main.lua, troca a leitura dos pixels das fases em levelLoader.lua e tira o contador de FPS de depuracao do canto
# da tela. O .love e um zip deterministico (ordem alfabetica, data fixa, deflate) com a arvore do repositorio sem
# .gitignore e TODO.md (notas do autor).
#
#   src/FredGames.Bundler/Builds/build-trispace.sh
#
# Saida: artifacts/build/trispace-355faae/trispace.love

set -euo pipefail

COMMIT=355faae9f6f30f4d4a70c231baeb8fc05699abed
SHA256=402c637f6441e7416f4006ccb26e9f1a0d5e492cdf5381bbeddc5cb8e3f5fa0d

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(git -C "$here" rev-parse --show-toplevel 2>/dev/null || pwd)"
out="$root/artifacts/build/trispace-${COMMIT:0:7}"
cache="$root/artifacts/build/cache"

mkdir -p "$cache"
tarball="$cache/trispace-${COMMIT:0:7}.tar.gz"
[ -f "$tarball" ] || curl -fsSL "https://github.com/gtrogers/ld42/archive/$COMMIT.tar.gz" -o "$tarball"
echo "$SHA256  $tarball" | shasum -a 256 -c -

rm -rf "$out"
mkdir -p "$out/tree"
tar -xzf "$tarball" -C "$out/tree" --strip-components 1
patch -d "$out/tree" -p1 < "$here/trispace/love11.patch"

python3 -I - "$out/tree" "$out/trispace.love" <<'PY'
import os, sys, zipfile
src, dest = sys.argv[1:]
names = []
for base, dirs, files in os.walk(src):
    for f in files:
        rel = os.path.relpath(os.path.join(base, f), src).replace(os.sep, '/')
        if rel in ('.gitignore', 'TODO.md'):
            continue
        names.append(rel)
with zipfile.ZipFile(dest, 'w', zipfile.ZIP_DEFLATED, compresslevel=9) as z:
    for rel in sorted(names):
        info = zipfile.ZipInfo(rel, (1980, 1, 1, 0, 0, 0))
        info.compress_type = zipfile.ZIP_DEFLATED
        info.external_attr = 0o644 << 16
        info.create_system = 3
        with open(os.path.join(src, rel), 'rb') as fh:
            z.writestr(info, fh.read(), compresslevel=9)
PY
shasum -a 256 "$out/trispace.love"