name: Release (Linux)

on:
  workflow_call:

jobs:
  linux:
    name: Linux (Generic)

    runs-on: ubuntu-20.04
    container:
      # manylinux2014 is based on CentOS 7, but already has a lot of things
      # installed and preconfigured. It makes it easier to build OpenTTD.
      image: quay.io/pypa/manylinux2014_x86_64

    steps:
    - name: Download source
      uses: actions/download-artifact@v3
      with:
        name: internal-source

    - name: Unpack source
      run: |
        tar -xf source.tar.gz --strip-components=1

    - name: Enable vcpkg cache
      uses: actions/cache@v3
      with:
        path: /vcpkg/installed
        key: ubuntu-20.04-vcpkg-release-0 # Increase the number whenever dependencies are modified
        restore-keys: |
          ubuntu-20.04-vcpkg-release

    - name: Install dependencies
      run: |
        echo "::group::Install system dependencies"
        # perl-IPC-Cmd, wget, and zip are needed to run vcpkg.
        # autoconf-archive is needed to build ICU.
        yum install -y \
          autoconf-archive \
          perl-IPC-Cmd \
          wget \
          zip \
          # EOF

        # aclocal looks first in /usr/local/share/aclocal, and if that doesn't
        # exist only looks in /usr/share/aclocal. We have files in both that
        # are important. So copy the latter to the first, and we are good to
        # go.
        cp /usr/share/aclocal/* /usr/local/share/aclocal/
        echo "::endgroup::"

        # We use vcpkg for our dependencies, to get more up-to-date version.
        echo "::group::Install vcpkg and dependencies"

        # We do a little dance to make sure we copy the cached install folder
        # into our new clone.
        git clone --depth=1 https://github.com/microsoft/vcpkg /vcpkg-clone
        if [ -e /vcpkg/installed ]; then
          mv /vcpkg/installed /vcpkg-clone/
          rm -rf /vcpkg
        fi
        mv /vcpkg-clone /vcpkg

        (
          cd /vcpkg
          ./bootstrap-vcpkg.sh -disableMetrics

          # Make Python3 available for other packages.
          ./vcpkg install python3
          ln -sf $(pwd)/installed/x64-linux/tools/python3/python3.[0-9][0-9] /usr/bin/python3

          ./vcpkg install \
            curl[http2] \
            fontconfig \
            freetype \
            harfbuzz \
            icu \
            liblzma \
            libpng \
            lzo \
            sdl2 \
            zlib \
            # EOF
        )
        echo "::endgroup::"

        # The yum variant of fluidsynth depends on all possible audio drivers,
        # like jack, ALSA, pulseaudio, etc. This is not really useful for us,
        # as we route the output of fluidsynth back via our sound driver, and
        # as such do not use these audio driver outputs at all.
        # The vcpkg variant of fluidsynth depends on ALSA. Similar issue here.
        # So instead, we compile fluidsynth ourselves, with as few
        # dependencies as possible. This currently means it picks up SDL2, but
        # this is fine, as we need SDL2 anyway.
        echo "::group::Install fluidsynth"
        wget https://github.com/FluidSynth/fluidsynth/archive/v2.1.6.tar.gz
        tar xf v2.1.6.tar.gz
        (
          cd fluidsynth-2.1.6
          mkdir build
          cd build
          cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=/usr
          cmake --build . -j $(nproc)
          cmake --install .
        )
        echo "::endgroup::"

    - name: Install GCC problem matcher
      uses: ammaraskar/gcc-problem-matcher@master

    - name: Build
      run: |
        mkdir -p build
        cd build

        echo "::group::CMake"
        cmake ${GITHUB_WORKSPACE} \
          -DCMAKE_TOOLCHAIN_FILE=/vcpkg/scripts/buildsystems/vcpkg.cmake \
          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
          -DOPTION_PACKAGE_DEPENDENCIES=ON \
          # EOF
        echo "::endgroup::"

        echo "::group::Build"
        echo "Running on $(nproc) cores"
        cmake --build . -j $(nproc)
        echo "::endgroup::"

    - name: Create bundles
      run: |
        cd ${GITHUB_WORKSPACE}/build
        echo "::group::Run CPack"
        cpack
        echo "::endgroup::"

        echo "::group::Cleanup"
        # Remove the sha256 files CPack generates; we will do this ourself at
        # the end of this workflow.
        rm -f bundles/*.sha256
        echo "::endgroup::"

    - name: Store bundles
      uses: actions/upload-artifact@v3
      with:
        name: openttd-linux-generic
        path: build/bundles
        retention-days: 5