#!/usr/bin/env bash
# Gera o down-sheep.love do Down Sheep (Alexander Griffith, codigo GPL-3.0-or-later, arte CC BY-SA 4.0) a partir
# do commit 2ecda47 do GitLab, com um patch nosso (publicado junto do fonte):
#   down-sheep/sounds-and-credits.patch  troca o som "scratch" (sem origem declarada) por "click" e acrescenta a
#                                        arte, o codigo e os efeitos sonoros a tela de creditos.
# Como no makefile do autor, o codigo Fennel (src/*.fnl e lib/*.fnl) e compilado para Lua com o compilador
# dele (lib/fennel, --compile --correlate); precisa de um `lua` no PATH. Os sons meaw.ogg, hiss.ogg, scratch.ogg
# e "F# Beep Scale.wav" ficam de fora (sem origem/licenca declarada e nao usados, exceto o scratch, trocado).
# O .love e um zip deterministico (ordem alfabetica, data fixa, deflate).
#
#   src/FredGames.Bundler/Builds/build-down-sheep.sh
#
# Saida: artifacts/build/down-sheep-2ecda47/down-sheep.love

set -euo pipefail

COMMIT=2ecda4758d66f4e73a950d9f2e11f4a6e353d4ba
SHA256=f1342c119be74f87f30ae305e82006099e2f60032d8f49496c8ab36e1b6ef6f5

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(git -C "$here" rev-parse --show-toplevel 2>/dev/null || pwd)"
out="$root/artifacts/build/down-sheep-2ecda47"
cache="$root/artifacts/build/cache"

mkdir -p "$cache"
tarball="$cache/downsheep-2ecda47.tar.gz"
[ -f "$tarball" ] || curl -fsSL "https://gitlab.com/alexjgriffith/downsheep/-/archive/2ecda47/downsheep-2ecda47.tar.gz" -o "$tarball"
echo "$SHA256  $tarball" | shasum -a 256 -c -

rm -rf "$out"
mkdir -p "$out/tree" "$out/game/lib" "$out/game/assets"
tar -xzf "$tarball" -C "$out/tree" --strip-components 1
patch -d "$out/tree" -p1 < "$here/down-sheep/sounds-and-credits.patch"

cd "$out/tree"
for f in src/*.fnl; do
  lua lib/fennel --compile --correlate "$f" > "$out/game/$(basename "${f%.fnl}").lua"
done
for f in lib/*.fnl; do
  lua lib/fennel --compile --correlate "$f" > "$out/game/${f%.fnl}.lua"
done
cp main.lua conf.lua license.txt "$out/game/"
cp lib/*.lua "$out/game/lib/"
cp -R assets "$out/game/"
rm -f "$out/game/assets/sounds/meaw.ogg" "$out/game/assets/sounds/hiss.ogg" \
      "$out/game/assets/sounds/scratch.ogg" "$out/game/assets/sounds/F# Beep Scale.wav"

python3 -I - "$out/game" "$out/down-sheep.love" <<'PY'
import os, sys, zipfile
src, dest = sys.argv[1:]
names = []
for base, dirs, files in os.walk(src):
    for f in files:
        names.append(os.path.relpath(os.path.join(base, f), src).replace(os.sep, '/'))
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/down-sheep.love"