name: CI

on:
  - push
  - pull_request

jobs:
  rustfmt:
    runs-on: ubuntu-latest
    timeout-minutes: 10

    steps:
    - uses: actions/checkout@v3

    - name: Install rustfmt
      run: |
        rustup component add rustfmt

    - name: Rustfmt
      run: |
        cargo fmt --check
        rustfmt --check build_system/mod.rs

  build:
    runs-on: ${{ matrix.os }}
    timeout-minutes: 60

    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-20.04 # FIXME switch to ubuntu-22.04 once #1303 is fixed
            env:
              TARGET_TRIPLE: x86_64-unknown-linux-gnu
          - os: macos-latest
            env:
              TARGET_TRIPLE: x86_64-apple-darwin
          # cross-compile from Linux to Windows using mingw
          - os: ubuntu-latest
            env:
              TARGET_TRIPLE: x86_64-pc-windows-gnu
          - os: ubuntu-latest
            env:
              TARGET_TRIPLE: aarch64-unknown-linux-gnu
          # s390x requires QEMU 6.1 or greater, we could build it from source, but ubuntu 22.04 comes with 6.2 by default
          - os: ubuntu-latest
            env:
              TARGET_TRIPLE: s390x-unknown-linux-gnu

    steps:
    - uses: actions/checkout@v3

    - name: Cache cargo installed crates
      uses: actions/cache@v3
      with:
        path: ~/.cargo/bin
        key: ${{ runner.os }}-cargo-installed-crates

    - name: Cache cargo registry and index
      uses: actions/cache@v3
      with:
        path: |
            ~/.cargo/registry
            ~/.cargo/git
        key: ${{ runner.os }}-cargo-registry-and-index-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo target dir
      uses: actions/cache@v3
      with:
        path: build/cg_clif
        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('rust-toolchain', '**/Cargo.lock') }}

    - name: Install MinGW toolchain and wine
      if: matrix.os == 'ubuntu-latest' && matrix.env.TARGET_TRIPLE == 'x86_64-pc-windows-gnu'
      run: |
        sudo apt-get update
        sudo apt-get install -y gcc-mingw-w64-x86-64 wine-stable
        rustup target add x86_64-pc-windows-gnu

    - name: Install AArch64 toolchain and qemu
      if: matrix.os == 'ubuntu-latest' && matrix.env.TARGET_TRIPLE == 'aarch64-unknown-linux-gnu'
      run: |
        sudo apt-get update
        sudo apt-get install -y gcc-aarch64-linux-gnu qemu-user

    - name: Install s390x toolchain and qemu
      if: matrix.env.TARGET_TRIPLE == 's390x-unknown-linux-gnu'
      run: |
        sudo apt-get update
        sudo apt-get install -y gcc-s390x-linux-gnu qemu-user

    - name: Prepare dependencies
      run: ./y.rs prepare

    - name: Build without unstable features
      env:
        TARGET_TRIPLE: ${{ matrix.env.TARGET_TRIPLE }}
      # This is the config rust-lang/rust uses for builds
      run: ./y.rs build --no-unstable-features

    - name: Build
      run: ./y.rs build --sysroot none

    - name: Test
      env:
        TARGET_TRIPLE: ${{ matrix.env.TARGET_TRIPLE }}
      run: |
        # Enable backtraces for easier debugging
        export RUST_BACKTRACE=1

        # Reduce amount of benchmark runs as they are slow
        export COMPILE_RUNS=2
        export RUN_RUNS=2

        # Enable extra checks
        export CG_CLIF_ENABLE_VERIFIER=1

        ./y.rs test

    - name: Package prebuilt cg_clif
      run: tar cvfJ cg_clif.tar.xz dist

    - name: Upload prebuilt cg_clif
      if: matrix.env.TARGET_TRIPLE != 'x86_64-pc-windows-gnu'
      uses: actions/upload-artifact@v2
      with:
        name: cg_clif-${{ matrix.env.TARGET_TRIPLE }}
        path: cg_clif.tar.xz

    - name: Upload prebuilt cg_clif (cross compile)
      if: matrix.env.TARGET_TRIPLE == 'x86_64-pc-windows-gnu'
      uses: actions/upload-artifact@v3
      with:
        name: cg_clif-${{ runner.os }}-cross-x86_64-mingw
        path: cg_clif.tar.xz

  windows:
    runs-on: ${{ matrix.os }}
    timeout-minutes: 60

    strategy:
      fail-fast: false
      matrix:
        include:
          # Native Windows build with MSVC
          - os: windows-latest
            env:
              TARGET_TRIPLE: x86_64-pc-windows-msvc
          # cross-compile from Windows to Windows MinGW
          - os: windows-latest
            env:
              TARGET_TRIPLE: x86_64-pc-windows-gnu

    steps:
    - uses: actions/checkout@v3

    - name: Cache cargo installed crates
      uses: actions/cache@v3
      with:
        path: ~/.cargo/bin
        key: ${{ runner.os }}-${{ matrix.env.TARGET_TRIPLE }}-cargo-installed-crates

    - name: Cache cargo registry and index
      uses: actions/cache@v3
      with:
        path: |
            ~/.cargo/registry
            ~/.cargo/git
        key: ${{ runner.os }}-${{ matrix.env.TARGET_TRIPLE }}-cargo-registry-and-index-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo target dir
      uses: actions/cache@v3
      with:
        path: build/cg_clif
        key: ${{ runner.os }}-${{ matrix.env.TARGET_TRIPLE }}-cargo-build-target-${{ hashFiles('rust-toolchain', '**/Cargo.lock') }}

    - name: Set MinGW as the default toolchain
      if: matrix.env.TARGET_TRIPLE == 'x86_64-pc-windows-gnu'
      run: rustup set default-host x86_64-pc-windows-gnu

    - name: Prepare dependencies
      run: |
        git config --global core.autocrlf false
        rustc y.rs -o y.exe -g
        ./y.exe prepare

    - name: Build without unstable features
      env:
        TARGET_TRIPLE: ${{ matrix.env.TARGET_TRIPLE }}
      # This is the config rust-lang/rust uses for builds
      run: ./y.rs build --no-unstable-features

    - name: Build
      run: ./y.rs build --sysroot none

    - name: Test
      run: |
        # Enable backtraces for easier debugging
        $Env:RUST_BACKTRACE=1

        # Reduce amount of benchmark runs as they are slow
        $Env:COMPILE_RUNS=2
        $Env:RUN_RUNS=2

        # Enable extra checks
        $Env:CG_CLIF_ENABLE_VERIFIER=1

        # WIP Disable some tests

        # This fails due to some weird argument handling by hyperfine, not an actual regression
        # more of a build system issue
        (Get-Content config.txt) -replace '(bench.simple-raytracer)', '# $1' |  Out-File config.txt

        # This fails with a different output than expected
        (Get-Content config.txt) -replace '(test.regex-shootout-regex-dna)', '# $1' |  Out-File config.txt

        ./y.exe test

    - name: Package prebuilt cg_clif
      # don't use compression as xzip isn't supported by tar on windows and bzip2 hangs
      run: tar cvf cg_clif.tar dist

    - name: Upload prebuilt cg_clif
      uses: actions/upload-artifact@v3
      with:
        name: cg_clif-${{ matrix.env.TARGET_TRIPLE }}
        path: cg_clif.tar