#!/usr/bin/env bash
# Compila The Romans Are Coming! (WASM-4, de Sander in 't Veld, MIT) a partir do fonte, no commit bae5479
# (v1.1.0), com uma unica mudanca: the-romans-are-coming/no-wreath.patch tira a coroa de louros do menu
# (arte de "scribbles pixels", citada no README sem termos de uso), junto do wreath.rs que a embute. O
# resto e o "cargo build --release" do repositorio com as flags do .cargo/config.toml dele, sem wasm-opt (a saida ja cabe nos 64 KiB).
# O repositorio nao versiona o Cargo.lock; o de Content/games/the-romans-are-coming/Cargo.lock foi gerado
# uma vez com o toolchain abaixo e o build usa --locked.
#
#   src/FredGames.Bundler/Builds/build-the-romans-are-coming.sh
#
# Saida: artifacts/build/the-romans-are-coming/the-romans-are-coming.wasm

set -euo pipefail

COMMIT=bae54791c0704eee42b5a25305ce52413d0eb5cd
SHA256=6c1fd2fe15d6789f01447f12a5b551c42cfc61de929b1c709155efcfa32f17f6
TOOLCHAIN=1.92.0
TARGET=wasm32-unknown-unknown
SLUG=the-romans-are-coming

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

export RUSTUP_HOME="$tools/rustup"
export CARGO_HOME="$tools/cargo"
export PATH="$CARGO_HOME/bin:$PATH"
if [ ! -x "$CARGO_HOME/bin/rustup" ]; then
  curl -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --profile minimal --default-toolchain none
fi
rustup toolchain install "$TOOLCHAIN" --profile minimal --target "$TARGET" >/dev/null

mkdir -p "$cache"
fetch() { [ -f "$cache/$2" ] || curl -fsSL --retry 4 "$1" -o "$cache/$2"; echo "$3  $cache/$2" | shasum -a 256 -c -; }
fetch "https://github.com/SLiV9/the-romans-are-coming/archive/$COMMIT.tar.gz" "$SLUG-${COMMIT:0:7}.tar.gz" "$SHA256"

rm -rf "$out"
mkdir -p "$out/tree"
tar -xzf "$cache/$SLUG-${COMMIT:0:7}.tar.gz" -C "$out/tree" --strip-components 1
(cd "$out/tree" && patch -p1 -s < "$here/$SLUG/no-wreath.patch" && rm -f src/wreath.rs)

locked=()
if [ -f "$lock" ]; then
  cp "$lock" "$out/tree/Cargo.lock"
  locked=(--locked)
fi

export CARGO_TARGET_DIR="$out/target"
export RUSTUP_TOOLCHAIN="$TOOLCHAIN"
export RUSTFLAGS="-Clink-arg=--import-memory -Clink-arg=--initial-memory=65536 -Clink-arg=--max-memory=65536 \
-Clink-arg=-zstack-size=14752 --remap-path-prefix=$out/tree=$SLUG --remap-path-prefix=$CARGO_HOME=cargo \
--remap-path-prefix=$RUSTUP_HOME=rustup"
(cd "$out/tree" && cargo build --release --target "$TARGET" ${locked[@]+"${locked[@]}"})

cp "$CARGO_TARGET_DIR/$TARGET/release/cart.wasm" "$out/$SLUG.wasm"
[ -f "$lock" ] || echo "Cargo.lock novo: confira e copie $out/tree/Cargo.lock para $lock"
ls -l "$out/$SLUG.wasm"
shasum -a 256 "$out/$SLUG.wasm"