#!/usr/bin/env bash
# Compila o Dig Escape (TanTanDev; Rust + good-web-game; Apache-2.0) para WebAssembly, no commit 3ebbf66, como o
# utils/wasm/build.sh do autor (cargo build --target wasm32-unknown-unknown --release; resources.tar embutido no .wasm).
# O repositorio nao traz Cargo.lock e depende de ramos git sem versao (good-web-game "audio", mais quad-snd e
# miniquad_text_rusttype, que o proprio good-web-game puxa do ramo principal), entao fixamos tudo:
#   dig-escape/pin-good-web-game.patch  troca branch = "audio" por rev = 2685d96 (a ponta do ramo, de 2020-05-21)
#   dig-escape/Cargo.lock               resolvido com quad-snd em e12ecbb (2020-05-01, o ultimo antes do jogo) e
#                                       miniquad_text_rusttype em bd4477a (2020-05-07, a ponta); crates.io na epoca da build
# O resources.tar (mapas, texturas, sons e so a fonte Kenney Mini + a licenca dela; o jogo nao usa as outras fontes) e
# gerado aqui, deterministico. A pagina (dig-escape/index.html, start.js) e nossa; gl.js e audio.js sao os do
# utils/wasm do jogo, sem mudanca. O codigo do jogo nao muda.
#
#   src/FredGames.Bundler/Builds/build-dig-escape.sh
#
# Saida: artifacts/build/dig-escape/{dist/, dig-escape-<commit>-dist.tar.gz, dig-escape-licenses.txt}; o .tar.gz tem que
# sair igual em dois builds seguidos (CODEGEN_UNITS=1, caminhos remapeados).

set -euo pipefail

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

export RUSTUP_HOME="$tools/rustup" CARGO_HOME="$tools/cargo"
export PATH="$CARGO_HOME/bin:$PATH"
TOOLCHAIN=1.92.0
COMMIT=3ebbf665263c8103c7ea43d779f567c972ddbe12
SHA256=f72b11b983242b933cd2570b639781c2d071760d059341bedd0502c99273485e

fetch() { # url arquivo sha256
  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 - >/dev/null
}

slug=dig-escape
out="$root/artifacts/build/$slug" tree="$root/artifacts/build/$slug/tree"
fetch "https://github.com/TanTanDev/DigEscape/archive/$COMMIT.tar.gz" "$slug-${COMMIT:0:7}.tar.gz" "$SHA256"
rustup toolchain install "$TOOLCHAIN" --profile minimal --target wasm32-unknown-unknown >/dev/null 2>&1
export RUSTUP_TOOLCHAIN="$TOOLCHAIN"

rm -rf "$out"; mkdir -p "$tree" "$out/dist"
tar -xzf "$cache/$slug-${COMMIT:0:7}.tar.gz" -C "$tree" --strip-components 1

( cd "$tree"
  patch -p1 < "$here/dig-escape/pin-good-web-game.patch" >/dev/null
  cp "$here/dig-escape/Cargo.lock" Cargo.lock
  ( cd resources
    find maps textures sounds "kenny_fontpackage/Fonts/Kenney Mini.ttf" kenny_fontpackage/License.txt -type f | LC_ALL=C sort > ../files.txt
    COPYFILE_DISABLE=1 tar --format=ustar --uid 0 --gid 0 --uname root --gname root -n -cf ../src/resources.tar -T ../files.txt )
  CARGO_INCREMENTAL=0 CARGO_PROFILE_RELEASE_CODEGEN_UNITS=1 \
    RUSTFLAGS="--remap-path-prefix=$tree=/src --remap-path-prefix=$CARGO_HOME=/cargo" \
    cargo build --locked --release --target wasm32-unknown-unknown 2> "$out/cargo.log" \
    || { tail -40 "$out/cargo.log"; exit 1; }
  cp target/wasm32-unknown-unknown/release/dig_escape.wasm "$out/dist/"
  cp utils/wasm/gl.js utils/wasm/audio.js "$out/dist/"
  cargo metadata --locked --format-version 1 --filter-platform wasm32-unknown-unknown 2>/dev/null > "$out/metadata.json"
  python3 -I "$here/gridbugs/rust-licenses.py" dig_escape "$out/crates.txt" < "$out/metadata.json" )
cp "$here/dig-escape/index.html" "$here/dig-escape/start.js" "$out/dist/"

{
  echo "Dig Escape - licences of the build"
  echo "=================================="
  echo
  echo "Source: https://github.com/TanTanDev/DigEscape at commit $COMMIT, licensed under the Apache License 2.0 (file LICENSE)."
  echo "The game's font is Kenney Mini (CC0, Kenney, www.kenney.nl); its licence file is embedded in the game's resources."
  echo
  echo "------------------------------------------------------------------------"
  echo "LICENSE"
  echo "------------------------------------------------------------------------"
  cat "$tree/LICENSE"; echo
  echo "------------------------------------------------------------------------"
  echo "resources/kenny_fontpackage/License.txt"
  echo "------------------------------------------------------------------------"
  cat "$tree/resources/kenny_fontpackage/License.txt"; echo
  echo "========================================================================"
  cat "$out/crates.txt"
} > "$out/$slug-licenses.txt"

find "$out/dist" -exec touch -t 202511010000 {} +
( cd "$out" && find dist -type f | LC_ALL=C sort > files.txt \
  && COPYFILE_DISABLE=1 tar --format=ustar --uid 0 --gid 0 --uname root --gname root -n -cf - -T files.txt \
  | gzip -n -9 > "$slug-${COMMIT:0:7}-dist.tar.gz" && rm files.txt )
rm -rf "$tree" "$out/metadata.json"
ls -l "$out/$slug-${COMMIT:0:7}-dist.tar.gz"
shasum -a 256 "$out/$slug-${COMMIT:0:7}-dist.tar.gz" "$out/$slug-licenses.txt" "$out/dist/dig_escape.wasm"