#!/usr/bin/env bash
# Exporta o Wind-Up Racer (Edmar Braga Gomes Filho, Brackeys Game Jam 2020.2; MIT, modelos e texturas do autor,
# fonte Germania One SIL OFL; github.com/EdmarDev/Wind-Up-Racer) para a web com o Godot 3.5.3 oficial: renderer do
# projeto, modelo webassembly_release (sem threads), sem PWA. O projeto do autor nao muda; o export_presets.cfg e nosso.
#
#   src/FredGames.Bundler/Builds/build-wind-up-racer.sh
#
# O editor (macOS universal) e os modelos de exportacao vem do release 3.5.3-stable do GitHub, conferidos pelo
# SHA-256, e ficam em artifacts/tools/godot-3.5.3 (instalados sob lockf; outros scripts compartilham a pasta). O
# editor roda com HOME dentro da pasta de saida (configuracao e modelo isolados).
#
# Saida: artifacts/build/wind-up-racer-<commit>/{web/,wind-up-racer-<commit>.tar.gz}, que o bundle.yaml do jogo confere pelo
# SHA-256. O tar.gz e o fonte do jogo como exportado (com as mudancas acima), igual a cada execucao.

set -euo pipefail

SLUG=wind-up-racer
REPO=EdmarDev/Wind-Up-Racer
COMMIT=33a98ec51b13d4c38d56034cd72c38da1953404a
SHORT=${COMMIT:0:7}
SHA256=c9b40ec50c00882a791af9dc9c495e28ab5c4dded15798df728664b022ecd244
GODOT=3.5.3
GODOT_URL=https://github.com/godotengine/godot/releases/download/$GODOT-stable
GODOT_MAC_SHA256=d448bf70a438edfd506c6878963327d7814d83fd636d132294fb7abb1f971246
GODOT_TPZ_SHA256=ae3c1f6fbd431b9e3b67c1f9e42539a6d270a0ccc35558f13072f04b968312d1

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

mkdir -p "$cache"
fetch() {
  if [ ! -f "$cache/$2" ]; then
    curl -fsSL --retry 4 "$1" -o "$cache/$2.partial" && mv "$cache/$2.partial" "$cache/$2"
  fi
  echo "$3  $cache/$2" | shasum -a 256 -c -
}

install_godot() {
  [ -d "$tools/godot-$GODOT" ] && return 0
  fetch "$GODOT_URL/Godot_v$GODOT-stable_osx.universal.zip" "Godot_v$GODOT-stable_osx.universal.zip" "$GODOT_MAC_SHA256"
  fetch "$GODOT_URL/Godot_v$GODOT-stable_export_templates.tpz" "Godot_v$GODOT-stable_export_templates.tpz" "$GODOT_TPZ_SHA256"
  rm -rf "$tools/godot-$GODOT.tmp"
  mkdir -p "$tools/godot-$GODOT.tmp"
  unzip -q "$cache/Godot_v$GODOT-stable_osx.universal.zip" -d "$tools/godot-$GODOT.tmp"
  unzip -q "$cache/Godot_v$GODOT-stable_export_templates.tpz" templates/webassembly_release.zip templates/version.txt \
    -d "$tools/godot-$GODOT.tmp"
  mv "$tools/godot-$GODOT.tmp" "$tools/godot-$GODOT"
}
if [ "${1:-}" = "--install" ]; then install_godot; exit 0; fi

fetch "https://github.com/$REPO/archive/$COMMIT.tar.gz" "$SLUG-$SHORT.tar.gz" "$SHA256"
if [ ! -d "$tools/godot-$GODOT" ]; then
  lockf -k "$root/artifacts/godot-$GODOT.lock" bash "${BASH_SOURCE[0]}" --install
fi

rm -rf "$out"
mkdir -p "$out/tree" "$out/web"
tar -xzf "$cache/$SLUG-$SHORT.tar.gz" -C "$out/tree" --strip-components 1
project="$out/tree"

# Nenhuma mudanca no projeto do autor.

# Data fixa nos arquivos e fonte publicado: o projeto (ja com as mudancas acima), em tar deterministico
# (ordem, dono e data fixos), sem o export_presets.cfg do autor.
rm -f "$project/export_presets.cfg"
TZ=UTC find "$out/tree" -exec touch -t 202001010000 {} +
( cd "$out/tree" && find . -type f | sed 's|^\./||' | LC_ALL=C sort > "$out/files.txt" )
( cd "$out/tree" && COPYFILE_DISABLE=1 tar --format=ustar --uid 0 --gid 0 --uname root --gname root -n \
    -cf - -T "$out/files.txt" ) | gzip -n -9 > "$out/$SLUG-$SHORT.tar.gz"

cp "$here/$SLUG/export_presets.cfg" "$project/export_presets.cfg"

export HOME="$out/home" TZ=UTC LC_ALL=C
templates="$HOME/Library/Application Support/Godot/templates/$GODOT.stable"
mkdir -p "$templates"
cp "$tools/godot-$GODOT/templates/webassembly_release.zip" "$tools/godot-$GODOT/templates/version.txt" "$templates/"

godot="$tools/godot-$GODOT/Godot.app/Contents/MacOS/Godot"
cd "$project"
# O editor do Godot 3 sai do --quit antes de terminar de importar ("Scan thread aborted"): o que falta
# (audio, modelos) so e importado durante um export. Por isso: uma passada do editor, um export descartavel
# (que termina de importar) e o export final, que nao pode ter reimportado nada nem falhado em abrir um
# recurso importado.
# Em alguns projetos o editor nunca sai sozinho depois do --quit (fica parado com a importacao ja feita): ele
# ganha 5 minutos e e encerrado; o export descartavel abaixo completa o que faltar.
"$godot" --path . --editor --quit --no-window > "$out/import.log" 2>&1 &
editor=$!
( sleep 300; kill "$editor" 2>/dev/null ) &
watchdog=$!
wait "$editor" || true
kill "$watchdog" 2>/dev/null || true
mkdir -p "$out/warmup"
"$godot" --path . --export "Web" "$out/warmup/index.html" --no-window > "$out/warmup.log" 2>&1 || true
rm -rf "$out/warmup"
"$godot" --path . --export "Web" "$out/web/index.html" --no-window > "$out/export.log" 2>&1
if grep -q -E "Cannot open file|reimport: begin|Scan thread aborted" "$out/export.log"; then
  echo "export com importacao incompleta, veja $out/export.log" >&2; exit 1
fi
( cd "$out/web" && shasum -a 256 * )
shasum -a 256 "$out/$SLUG-$SHORT.tar.gz"