#!/usr/bin/env bash
# Exporta o o.l.e.s.a. (Julien Letellier, Game Off 2024; codigo MIT, arte CC BY 4.0, creditos de terceiros no
# README do repositorio, github.com/jletellier/olesa) para a web com o Godot 4.4.1 oficial (a versao do projeto,
# "4.4"): renderer Compatibility, SEM threads (modelo web_nothreads_release: nao precisa de SharedArrayBuffer
# nem dos cabecalhos COOP/COEP), sem PWA. O projeto do autor nao muda; so acrescentamos o export_presets.cfg
# ao lado deste script (o do repositorio liga o PWA e o isolamento COOP/COEP).
#
#   src/FredGames.Bundler/Builds/build-olesa.sh
#
# As musicas e os sons do repositorio estao no Git LFS (o tarball do GitHub traz so os ponteiros): o script
# baixa cada objeto de media.githubusercontent.com e confere o sha256 do ponteiro.
#
# O editor (macOS universal) e os modelos de exportacao vem do release 4.4.1-stable do GitHub, conferidos pelo
# SHA-256 (os mesmos arquivos do SHA512-SUMS.txt do release) e ficam em artifacts/tools/godot-4.4.1, instalados
# sob lockf (outros scripts podem estar instalando ao mesmo tempo). O editor roda com HOME dentro da pasta de
# saida (configuracao e modelo isolados).
#
# Saida: artifacts/build/olesa-0b518d8/{web/,olesa-0b518d8.tar.gz}, que o bundle.yaml do jogo confere pelo
# SHA-256. O tar.gz e o fonte do jogo, com a musica e os sons ja baixados do LFS, e sai igual a cada execucao.

set -euo pipefail

COMMIT=0b518d87eb035377a31f36e265a91e5fe41f9a4d
SHA256=eabf3734428a2c17ecae315cf6b2a2740da4cf949b13b2f1025534b1cb2b8126
GODOT=4.4.1
GODOT_URL=https://github.com/godotengine/godot/releases/download/$GODOT-stable
GODOT_MAC_SHA256=6c670596d21afb7917c739d0b85b10b4ac6a44051ffa2a672f90bc7da5062864
GODOT_TPZ_SHA256=7a8d14ade489fd4d22f178193021fe8a876a9e51068ed4dde26dac3ae4c59a88

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(git -C "$here" rev-parse --show-toplevel 2>/dev/null || pwd)"
out="$root/artifacts/build/olesa-${COMMIT:0:7}"
cache="$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_macos.universal.zip" "Godot_v$GODOT-stable_macos.universal.zip" "$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_macos.universal.zip" -d "$tools/godot-$GODOT.tmp"
  unzip -q "$cache/Godot_v$GODOT-stable_export_templates.tpz" templates/web_nothreads_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/jletellier/olesa/archive/$COMMIT.tar.gz" "olesa-${COMMIT:0:7}.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/olesa-${COMMIT:0:7}.tar.gz" -C "$out/tree" --strip-components 1

# Git LFS: troca cada ponteiro pelo objeto (conferido pelo sha256 do proprio ponteiro).
( cd "$out/tree" && grep -rl --exclude-dir=.git '^version https://git-lfs.github.com/spec/v1' . || true ) | LC_ALL=C sort |
while read -r f; do
  oid="$(sed -n 's/^oid sha256://p' "$out/tree/$f")"
  fetch "https://media.githubusercontent.com/media/jletellier/olesa/$COMMIT/${f#./}" "lfs-$oid" "$oid"
  cp "$cache/lfs-$oid" "$out/tree/$f"
done
if grep -rl --exclude-dir=.git '^version https://git-lfs.github.com/spec/v1' "$out/tree" >/dev/null; then
  echo "ponteiros LFS restantes" >&2; exit 1
fi

# Data fixa nos arquivos (os baixados do LFS e os alterados ganham a data de hoje).
TZ=UTC find "$out/tree" -exec touch -t 202001010000 {} +
# Fonte publicado: o projeto inteiro, em tar deterministico (ordem, dono e data fixos).
( cd "$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/olesa-${COMMIT:0:7}.tar.gz"

project="$out/tree"
cp "$here/olesa/export_presets.cfg" "$project/export_presets.cfg"

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

godot="$tools/godot-$GODOT/Godot.app/Contents/MacOS/Godot"
cd "$project"
# A primeira passada importa os recursos (cria .godot/); a segunda exporta.
"$godot" --headless --path . --import > "$out/import.log" 2>&1 || true
"$godot" --headless --path . --export-release "Web" "$out/web/index.html" > "$out/export.log" 2>&1
ls -l "$out/web"