name: Emscripten Build
on: [push]

env:
  emscripten-version: 1.39.8

jobs:
  build:
    runs-on: ubuntu-latest
    steps:

    - uses: actions/checkout@v2

    - name: Cache emsdk
      uses: actions/cache@v1
      id: cache
      with:
        path: emsdk-cache
        key: ${{ runner.os }}-emsdk-${{ env.emscripten-version }}

    - name: Cache .emscripten_cache
      uses: actions/cache@v1
      with:
        path: emscripten-cache
        key: emscripten-cache-${{ env.emscripten-version }}

    - name: Setup Emscripten toolchain
      uses: mymindstorm/setup-emsdk@v3
      with:
        version: ${{ env.emscripten-version }}
        actions-cache-folder: emsdk-cache
        no-cache: true

    - name: Build
      env:
        EM_CACHE: ${{ github.workspace }}/emscripten-cache/cache
        EM_PORTS: ${{ github.workspace }}/emscripten-cache/ports
      run: |
        mkdir -p emscripten-cache
        mkdir -p out/wasm
        cd out/wasm
        emcmake cmake -DCMAKE_BUILD_TYPE=MinSizeRel ../../src/
        make
        mkdir system3
        mv system3.* system3/

    - name: Upload artifacts
      uses: actions/upload-artifact@v1
      with:
        name: system3-wasm
        path: out/wasm/system3