name: Linux

on: [push, pull_request]

jobs:
  build:
    defaults:
      run:
        shell: bash
    name: "GCC-C++${{matrix.std}}-${{matrix.build_type}} (shared: ${{matrix.shared}} custom prefix: ${{matrix.custom_prefix}})"
    runs-on: ubuntu-latest
    strategy:
      fail-fast: true
      matrix:
          build_type: [Release, Debug]
          std: [98, 11, 14, 17, 20]
          custom_prefix: [ON, OFF]
          shared: [ON, OFF]

    steps:
    - uses: actions/checkout@v2

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

    - name: Build GTest
      run: |
        wget https://github.com/google/googletest/archive/refs/tags/release-1.11.0.tar.gz
        tar xvf release-1.11.0.tar.gz
        cmake -S googletest-release-1.11.0 -B build-googletest \
          -DBUILD_SHARED_LIBS=${{matrix.shared}} \
          -DCMAKE_INSTALL_PREFIX=./install \
          -G Ninja
        cmake --build build-googletest --target install

    - name: Setup Environment
      if: ${{matrix.build_type == 'Debug'}}
      run: |
        echo 'CXXFLAGS=--coverage' >> $GITHUB_ENV

    - name: Configure
      run: |
        cmake -S . -B build_${{matrix.build_type}} -G Ninja \
          -DBUILD_SHARED_LIBS=${{matrix.shared}} \
          -DCMAKE_CXX_STANDARD=${{matrix.std}} \
          -DCMAKE_CXX_STANDARD_REQUIRED=ON \
          -DCMAKE_INSTALL_PREFIX:PATH=./install \
          -DWITH_CUSTOM_PREFIX=${{matrix.custom_prefix}}

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

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

        cmake build_${{matrix.build_type}} -G Ninja \
              -DCMAKE_INSTALL_INCLUDEDIR=${{runner.workspace}}/foo/include \
              -DCMAKE_INSTALL_LIBDIR=${{runner.workspace}}/foo/lib \
              -DCMAKE_INSTALL_DATAROOTDIR=${{runner.workspace}}/foo/share
        cmake --build build_${{matrix.build_type}} \
              --config ${{matrix.build_type}} \
              --target install

    - name: Test CMake Package (relative GNUInstallDirs)
      run: |
        cmake -S src/package_config_unittest/working_config \
              -B build_${{matrix.build_type}}_package \
              -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
              -DCMAKE_PREFIX_PATH=./build_${{matrix.build_type}}/install \
              -G Ninja
        cmake --build build_${{matrix.build_type}}_package \
              --config ${{matrix.build_type}}

    - name: Test CMake Package (absolute GNUInstallDirs)
      run: |
        cmake -S src/package_config_unittest/working_config \
              -B build_${{matrix.build_type}}_package_foo \
              -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
              -DCMAKE_PREFIX_PATH=${{runner.workspace}}/foo \
              -G Ninja
        cmake --build build_${{matrix.build_type}}_package_foo \
              --config ${{matrix.build_type}}

    - name: Test
      run: |
        ctest --test-dir build_${{matrix.build_type}} -j$(nproc) --output-on-failure

    - name: Generate Coverage
      if: ${{ startswith(matrix.build_type, 'Debug') }}
      run: |
        lcov --directory . --capture --output-file coverage.info
        lcov --remove coverage.info \
          '*/install/include/*' \
          '*/src/*_unittest.cc' \
          '*/src/googletest.h' \
          '*/src/mock-log.h' \
          '/usr/*' \
          --output-file coverage.info

        for file in src/glog/*.h.in; do
          name=$(basename ${file})
          name_we=${name%.h.in}
          sed -i "s|build_${{matrix.build_type}}/glog/${name_we}.h\$|${file}|g" coverage.info
        done

        lcov --list coverage.info

    - name: Upload Coverage to Coveralls
      if: ${{ startswith(matrix.build_type, 'Debug') }}
      uses: coverallsapp/github-action@master
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        path-to-lcov: ./coverage.info