#!/usr/bin/env bash
set -euo pipefail

repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
emsdk_dir="${EMSDK_ROOT:-${repo_root}/.emsdk}"
emsdk_url="${EMSDK_URL:-https://gh-proxy.com/https://github.com/emscripten-core/emsdk/archive/refs/heads/main.tar.gz}"

if [[ ! -x "${emsdk_dir}/emsdk" ]]; then
  archive="$(mktemp --suffix=.tar.gz)"
  trap 'rm -f "${archive}"' EXIT
  curl -L --fail --retry 3 --max-time 180 "${emsdk_url}" -o "${archive}"
  mkdir -p "${emsdk_dir}"
  tar -xzf "${archive}" --strip-components=1 -C "${emsdk_dir}"
fi

cd "${emsdk_dir}"
./emsdk install 3.1.69
./emsdk activate 3.1.69
source ./emsdk_env.sh
emcc --version | head -3
printf 'emscripten-ready root=%s version=%s\n' "${emsdk_dir}" "$(emcc --version | awk 'NR==1 {print $NF}')"