#!/usr/bin/env bash
# Compila Ratcatcher (homebrew de Atari 5200 de Ryan Witmer / Average Software, GPL-3.0-or-later) do pacote
# que o proprio autor publica em phasercat.com (ratcatcher.zip: License.txt, source/ e ratcatcher.bin) com o
# dasm 2.20.14.1, pelo comando do Makefile dele: "dasm ratcatcher.s -f3 -oratcatcher.bin" dentro de source/.
# A ROM crua de 32 KB sai identica, byte a byte, ao ratcatcher.bin do pacote; dois builds seguidos dao o mesmo
# sha256. O site hospeda o zip inteiro, o dasm e este script.
#
#   src/FredGames.Bundler/Builds/build-ratcatcher.sh
#
# Saida: artifacts/build/ratcatcher/ratcatcher.a52

set -euo pipefail

DASM=2.20.14.1
DASM_SHA256=ec71ffd10eeaa70bf7587ee0d79a92cd3f0a017c0d6d793e37d10359ceea663a
GAME_URL=https://phasercat.com/wp-content/uploads/2020/08/ratcatcher.zip
GAME_SHA256=07b5e287883cd2a7a70bf3c512ac498f72b2a60dbd8484476bb329996d011852
ROM_SHA256=6f1a4c0ca3d679363d6615e0903714bd49ac99163965662f6c2c527983dd7f25

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

mkdir -p "$cache"
fetch() { [ -f "$2" ] || curl -fsSL --retry 4 "$1" -o "$2"; echo "$3  $2" | shasum -a 256 -c -; }
fetch "https://github.com/dasm-assembler/dasm/archive/refs/tags/$DASM.tar.gz" "$cache/dasm-$DASM.tar.gz" "$DASM_SHA256"
fetch "$GAME_URL" "$cache/ratcatcher-phasercat.zip" "$GAME_SHA256"

if [ ! -x "$tools/src/dasm" ]; then
  rm -rf "$tools" && mkdir -p "$tools"
  tar -xzf "$cache/dasm-$DASM.tar.gz" -C "$tools" --strip-components 1
  make -C "$tools/src" dasm >/dev/null 2>&1
fi

rm -rf "$out" && mkdir -p "$out/tree"
unzip -q "$cache/ratcatcher-phasercat.zip" -d "$out/tree"
(cd "$out/tree/ratcatcher/source" && "$tools/src/dasm" ratcatcher.s -f3 -o"$out/ratcatcher.a52" >/dev/null)
rm -rf "$out/tree"
echo "$ROM_SHA256  $out/ratcatcher.a52" | shasum -a 256 -c -