name: Builds
on:
  push:
  schedule:
    - cron: '0 0 * * *'

jobs:
  # For scheduled builds, get the commit ids of the latest versions to build.
  #
  # Doing this as one single job, which then propagates the information further
  # to the other jobs, so that all build jobs in one workflow builds the exact
  # same version. This allows trusting builds without assertions enabled
  # slightly more, when we know a separate build of the same version but with
  # assertions enabled, has passed some amount of tests.
  get-versions:
    if: (github.event_name != 'schedule') || (github.repository == 'mstorsjo/llvm-mingw')
    runs-on: ubuntu-latest
    steps:
      - name: Touch file
        run: |
          touch versions
      - name: Check latest version
        if: github.event_name == 'schedule'
        run: |
          echo LLVM_VERSION=$(git ls-remote https://github.com/llvm/llvm-project.git | grep 'refs/heads/main$' | awk '{print $1}') >> versions
          echo MINGW_W64_VERSION=$(git ls-remote https://github.com/mingw-w64/mingw-w64.git | grep 'refs/heads/master$' | awk '{print $1}') >> versions
          echo PYTHON_VERSION_MINGW=$(git ls-remote https://github.com/msys2-contrib/cpython-mingw.git | grep 'refs/heads/mingw-v3.10.5$' | awk '{print $1}') >> versions
      - uses: actions/upload-artifact@v2
        with:
          name: versions
          path: |
            versions
          retention-days: 7

  # Build a cross compiler for Linux, targeting Windows.
  #
  # The scheduled builds are made with the latest git version of llvm-project
  # and mingw-w64. When using random git snapshot builds of llvm, there's
  # always a risk for bugs - thus build such versions with assertions enabled,
  # to better catch such bugs early. This makes the first-stage toolchain built
  # here in scheduled builds somewhat slower.
  linux:
    if: (github.event_name != 'schedule') || (github.repository == 'mstorsjo/llvm-mingw')
    needs: [get-versions]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/download-artifact@v3
        if: github.event_name == 'schedule'
        with:
          name: versions
      - name: Set build env vars
        if: github.event_name == 'schedule'
        run: |
          . versions
          echo Building llvm-project $LLVM_VERSION mingw-w64 $MINGW_W64_VERSION, with assertions enabled
          cat versions >> $GITHUB_ENV
          echo ASSERT_PARAMS=--enable-asserts >> $GITHUB_ENV
          mkdir -p install/llvm-mingw
          cp versions install/llvm-mingw
      - name: Build
        run: |
          sudo apt-get update && sudo apt-get install ninja-build
          ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb $ASSERT_PARAMS
          cd install
          tar -Jcf ../llvm-mingw-linux.tar.xz llvm-mingw
      - uses: actions/upload-artifact@v2
        with:
          name: linux-toolchain
          path: |
            llvm-mingw-linux.tar.xz
          retention-days: 7

  # Build a cross compiler for macOS, targeting Windows.
  macos:
    if: (github.event_name != 'schedule') || (github.repository == 'mstorsjo/llvm-mingw')
    needs: [get-versions]
    runs-on: macos-latest
    steps:
      - uses: actions/download-artifact@v3
        if: github.event_name == 'schedule'
        with:
          name: versions
      - name: Set build env vars
        if: github.event_name == 'schedule'
        run: |
          . versions
          echo Building llvm-project $LLVM_VERSION mingw-w64 $MINGW_W64_VERSION
          cat versions >> $GITHUB_ENV
      - uses: actions/checkout@v2
      - name: Build
        run: |
          brew install ninja
          # Building with MACOS_REDIST=1 (building universal binaries) without
          # --disable-lldb fails in Github Actions, because python is available
          # (and gets picked up), but only exists in native form.
          # Disable use of zstd too - it's also available, but only in native
          # form.
          MACOS_REDIST=1 LLVM_CMAKEFLAGS="-DLLVM_ENABLE_ZSTD=OFF" ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb
          cd install
          tar -Jcf ../llvm-mingw-macos.tar.xz llvm-mingw
      - uses: actions/upload-artifact@v2
        with:
          name: macos-toolchain
          path: |
            llvm-mingw-macos.tar.xz
          retention-days: 7

  # Test building the toolchain on msys2 (in the mingw64 and clang64
  # environments). The binaries built here rely on the runtime libraries from
  # the host environment (libstdc++ or libc++). No artifacts are stored from
  # these builds, but llvm-mingw's tests are run.
  msys2:
    if: (github.event_name != 'schedule') || (github.repository == 'mstorsjo/llvm-mingw')
    needs: [get-versions]
    runs-on: windows-latest
    defaults:
      run:
        shell: msys2 {0}
    strategy:
      fail-fast: false
      matrix:
        sys:
          - mingw64
          - clang64
    steps:
      - uses: msys2/setup-msys2@v2
        with:
          msystem: ${{matrix.sys}}
          install: >-
            git
            make
          pacboy: >-
            toolchain:p
            cmake:p
            ninja:p
      - uses: actions/download-artifact@v3
        if: github.event_name == 'schedule'
        with:
          name: versions
      - name: Set build env vars
        if: github.event_name == 'schedule'
        run: |
          . versions
          echo Building llvm-project $LLVM_VERSION mingw-w64 $MINGW_W64_VERSION
          cat versions >> $GITHUB_ENV
      - uses: actions/checkout@v2
      - name: Build
        run: |
          ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb
          ./run-tests.sh $(pwd)/install/llvm-mingw

  # Use the Linux cross compilers built in the first step to cross compile
  # llvm and make a proper standalone toolchain for Windows (for all 4
  # architectures). The binaries built here match actual releases quite closely.
  #
  # For scheduled builds, the first stage compiler was built with assertions
  # enabled, but this stage is built without assertions - so the end packaged
  # build should be as fast as normal releases (with the intent that the first
  # stage compiler should build enough code to find many regressions).
  linux-cross:
    if: (github.event_name != 'schedule') || (github.repository == 'mstorsjo/llvm-mingw')
    needs: [linux]
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        arch:
          - i686
          - x86_64
          - armv7
          - aarch64
    steps:
      - uses: actions/download-artifact@v3
        with:
          name: linux-toolchain
      - name: Unpack cross toolchain
        run: |
          tar -Jxf llvm-mingw-linux.tar.xz
          rm llvm-mingw-linux.tar.xz
          sudo mv llvm-mingw /opt/llvm-mingw
          echo /opt/llvm-mingw/bin >> $GITHUB_PATH
      - name: Fetch version
        if: github.event_name == 'schedule'
        run: |
          . /opt/llvm-mingw/versions
          echo Building llvm-project $LLVM_VERSION mingw-w64 $MINGW_W64_VERSION cpython-mingw $PYTHON_VERSION_MINGW
          cat /opt/llvm-mingw/versions >> $GITHUB_ENV
      - uses: actions/checkout@v2
      - name: Build
        run: |
          sudo apt-get update && sudo apt-get install autoconf-archive ninja-build
          ./build-cross-tools.sh /opt/llvm-mingw $(pwd)/install/llvm-mingw-${{matrix.arch}} ${{matrix.arch}} --with-python
          cd install
          zip -9rq ../llvm-mingw-${{matrix.arch}}.zip llvm-mingw-${{matrix.arch}}
      - uses: actions/upload-artifact@v2
        with:
          name: windows-${{matrix.arch}}-toolchain
          path: |
            llvm-mingw-${{matrix.arch}}.zip
          retention-days: 7

  # Run llvm-mingw's tests on x86_64 (and i686) with the cross-built x86_64
  # toolchain from above.
  test-toolchain:
    if: (github.event_name != 'schedule') || (github.repository == 'mstorsjo/llvm-mingw')
    needs: [linux-cross]
    runs-on: windows-latest
    defaults:
      run:
        shell: msys2 {0}
    steps:
      - uses: msys2/setup-msys2@v2
        with:
          msystem: mingw64
          install: >-
            unzip
      - uses: actions/download-artifact@v3
        with:
          name: windows-x86_64-toolchain
      - name: Unpack toolchain
        run: |
          unzip -q llvm-mingw-x86_64.zip
          rm llvm-mingw-x86_64.zip
          mv llvm-mingw-* /llvm-mingw
          echo /llvm-mingw/bin >> $GITHUB_PATH
      - uses: actions/checkout@v2
      - name: Run tests
        run: |
          ./run-tests.sh /llvm-mingw

  # Test cross-building ffmpeg for all 4 targeted architectures from linux.
  # This is done only on scheduled builds, to give them a bit more testing,
  # to find potential code generation regressions that trigger failed asserts.
  linux-test-cross-build-ffmpeg:
    if: (github.event_name == 'schedule') && (github.repository == 'mstorsjo/llvm-mingw')
    needs: [linux]
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        arch:
          - i686
          - x86_64
          - armv7
          - aarch64
    steps:
      - uses: actions/download-artifact@v3
        with:
          name: linux-toolchain
      - name: Unpack cross toolchain
        run: |
          tar -Jxf llvm-mingw-linux.tar.xz
          rm llvm-mingw-linux.tar.xz
          sudo mv llvm-mingw /opt/llvm-mingw
          echo /opt/llvm-mingw/bin >> $GITHUB_PATH
      - name: Checkout ffmpeg
        uses: actions/checkout@v2
        with:
          repository: ffmpeg/ffmpeg
          path: ffmpeg
      - name: Build ffmpeg
        run: |
          sudo apt-get update && sudo apt-get install nasm
          mkdir ffmpeg-build
          cd ffmpeg-build
          ../ffmpeg/configure --arch=${{matrix.arch}} --target-os=mingw32 --cross-prefix=${{matrix.arch}}-w64-mingw32- --enable-gpl
          make -j$(nproc)

  # Test building ffmpeg for natively on x86_64 Windows and run its tests,
  # to find cases of compiler bugs don't show up as failed asserts in the
  # compiler itself, but that only show up at runtime. This is only done
  # for scheduled builds.
  test-ffmpeg:
    if: (github.event_name == 'schedule') && (github.repository == 'mstorsjo/llvm-mingw')
    needs: [linux-cross]
    runs-on: windows-latest
    defaults:
      run:
        shell: msys2 {0}
    steps:
      - name: Avoid git checking out files with CRLF
        shell: cmd
        run: |
          git config --global core.autocrlf false
      - uses: msys2/setup-msys2@v2
        with:
          msystem: mingw64
          update: false
          install: >-
            unzip
            make
            rsync
            diffutils
          pacboy: >-
            nasm:p
      - uses: actions/download-artifact@v3
        with:
          name: windows-x86_64-toolchain
      - name: Unpack toolchain
        run: |
          unzip -q llvm-mingw-x86_64.zip
          rm llvm-mingw-x86_64.zip
          mv llvm-mingw-* /llvm-mingw
          echo /llvm-mingw/bin >> $GITHUB_PATH
      - name: Checkout ffmpeg
        uses: actions/checkout@v2
        with:
          repository: ffmpeg/ffmpeg
          path: ffmpeg
      - name: Build & test ffmpeg
        run: |
          export PATH=/llvm-mingw/bin:$PATH
          mkdir ffmpeg-build
          cd ffmpeg-build
          ../ffmpeg/configure --samples=../fate-samples --enable-gpl --ignore-tests="vsynth1-mpeg2-422,vsynth2-mpeg2-422,vsynth3-mpeg2-422,vsynth_lena-mpeg2-422,seek-vsynth_lena-mpeg2-422"
          make -j$(nproc)
          make fate-rsync
          make -j$(nproc) fate