Github: Change release workflows to match upstream

.github/workflows/release-linux.yml

@@ -0,0 +1,155 @@
+name: Release (Linux)
+
+on:
+  workflow_call:
+    inputs:
+      survey_key:
+        required: false
+        type: string
+        default: ""
+
+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-1 # 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 \
+            nlohmann-json \
+            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 ${GITHUB_WORKSPACE} \
+          -DCMAKE_TOOLCHAIN_FILE=/vcpkg/scripts/buildsystems/vcpkg.cmake \
+          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+          -DOPTION_SURVEY_KEY=${{ inputs.survey_key }} \
+          -DOPTION_PACKAGE_DEPENDENCIES=ON \
+          # EOF
+        echo "::endgroup::"
+
+        echo "::group::Build"
+        echo "Running on $(nproc) cores"
+        cmake --build . -j $(nproc) --target openttd
+        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