name: Emscripten

on: [push, pull_request]

jobs:
  build-linux:
    defaults:
      run:
        shell: bash
    name: Emscripten-C++${{matrix.std}}-${{matrix.build_type}}-${{matrix.lib}}-${{matrix.extra}}
    runs-on: ubuntu-latest
    container: emscripten/emsdk
    strategy:
      fail-fast: true
      matrix:
        build_type: [Release, Debug]
        extra: [no-custom-prefix, custom-prefix]
        lib: [static]
        std: [98, 11, 14, 17, 20]

    steps:
      - uses: actions/checkout@v2

      - name: Setup Dependencies
        run: |
          apt-get update
          DEBIAN_FRONTEND=noninteractive sudo apt-get install -y \
            cmake \
            ninja-build

      - name: Setup C++98 Environment
        if: matrix.std == '98'
        run: |
          echo 'CXXFLAGS=-Wno-error=variadic-macros -Wno-error=long-long ${{env.CXXFLAGS}}' >> $GITHUB_ENV

      - name: Configure
        env:
          CXXFLAGS: -Wall -Wextra -Wsign-conversion -Wtautological-compare -Wformat-nonliteral -Wundef -Werror -Wno-error=wasm-exception-spec ${{env.CXXFLAGS}}
        run: |
          cmake -S . -B build_${{matrix.build_type}} \
            -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \
            -DCMAKE_AR=$(which emar) \
            -DCMAKE_C_COMPILER=$(which emcc) \
            -DCMAKE_CXX_COMPILER=$(which em++) \
            -DCMAKE_CXX_STANDARD=${{matrix.std}} \
            -DCMAKE_CXX_STANDARD_REQUIRED=ON \
            -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
            -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
            -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY \
            -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER \
            -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install \
            -DCMAKE_RANLIB=$(which emranlib) \
            -DWITH_CUSTOM_PREFIX=${{matrix.extra == 'custom-prefix'}} \
            -G Ninja \
            -Werror

      - name: Build
        run: |
          cmake --build build_${{matrix.build_type}} \
                --config ${{matrix.build_type}}