name: CI
on: [push, pull_request]

jobs:
  buildlibc:
    name: Build libc
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        clang_version: [10.0.0]
        # use different LLVM versions among oses because of the lack of
        # official assets on github.
        include:
          - os: ubuntu-latest
            clang_version: 10.0.0
            llvm_asset_suffix: x86_64-linux-gnu-ubuntu-18.04
          - os: macos-latest
            clang_version: 10.0.0
            llvm_asset_suffix: x86_64-apple-darwin
          - os: windows-latest
            clang_version: 10.0.0
          - os: ubuntu-latest
            clang_version: 16.0.0
            llvm_asset_suffix: x86_64-linux-gnu-ubuntu-18.04
          - os: macos-latest
            clang_version: 15.0.7
            llvm_asset_suffix: x86_64-apple-darwin21.0
          - os: windows-latest
            clang_version: 16.0.0
    steps:
    - uses: actions/checkout@v1
      with:
        submodules: true

    - name: Install libtinfo5
      run: |
        set -ex
        sudo apt-get update
        sudo apt-get install -y libtinfo5
      if: matrix.os == 'ubuntu-latest'

    - name: Install LLVM tools (Windows)
      shell: bash
      run: |
        curl -fsSLO https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.clang_version }}/LLVM-${{ matrix.clang_version }}-win64.exe
        7z x LLVM-${{ matrix.clang_version }}-win64.exe -y -o"llvm"
        echo "$(pwd)/llvm/bin" >> $GITHUB_PATH
        echo "CC=$(pwd)/llvm/bin/clang.exe" >> $GITHUB_ENV
        echo "AR=$(pwd)/llvm/bin/llvm-ar.exe" >> $GITHUB_ENV
        echo "NM=$(pwd)/llvm/bin/llvm-nm.exe" >> $GITHUB_ENV
      if: matrix.os == 'windows-latest'

    - name: Override llvm-nm with one from rustup (Windows)
      run: |
        rustup update stable
        rustup default stable
        rustup component add llvm-tools-preview
        echo "NM=$(rustc --print sysroot|sed 's|C:|/c|'|sed 's|\\|/|g')/lib/rustlib/x86_64-pc-windows-msvc/bin/llvm-nm.exe" >> $GITHUB_ENV
      if: matrix.os == 'windows-latest'

    - name: Install LLVM tools (MacOS)
      shell: bash
      run: |
        curl -sSfL https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.clang_version }}/clang+llvm-${{ matrix.clang_version }}-${{ matrix.llvm_asset_suffix }}.tar.xz | tar xJf -
        export CLANG_DIR=`pwd`/clang+llvm-${{ matrix.clang_version }}-${{ matrix.llvm_asset_suffix }}/bin
        echo "$CLANG_DIR" >> $GITHUB_PATH
        echo "CC=$CLANG_DIR/clang" >> $GITHUB_ENV
        echo "AR=$CLANG_DIR/llvm-ar" >> $GITHUB_ENV
        echo "NM=$CLANG_DIR/llvm-nm" >> $GITHUB_ENV
      if: matrix.os == 'macos-latest'

    - name: Install LLVM tools (Linux)
      shell: bash
      run: |
        curl -sSfL https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.clang_version }}/clang+llvm-${{ matrix.clang_version }}-${{ matrix.llvm_asset_suffix }}.tar.xz | tar xJf -
        export CLANG_DIR=`pwd`/clang+llvm-${{ matrix.clang_version }}-${{ matrix.llvm_asset_suffix }}/bin
        echo "$CLANG_DIR" >> $GITHUB_PATH
        echo "CLANG_DIR=$CLANG_DIR" >> $GITHUB_ENV
        echo "CC=$CLANG_DIR/clang" >> $GITHUB_ENV
        echo "AR=$CLANG_DIR/llvm-ar" >> $GITHUB_ENV
        echo "NM=$CLANG_DIR/llvm-nm" >> $GITHUB_ENV
      if: matrix.os == 'ubuntu-latest'

    - name: Build libc
      shell: bash
      run: make -j4

    - name: Test
      shell: bash
      # For Clang linking to work correctly, we need to place Clang's runtime
      # library for `wasm32-wasi` in the right location (i.e., the `mkdir` and
      # `cp` below).
      run: |
        cd test
        make download
        export WASI_DIR=$(realpath $($CLANG_DIR/clang -print-resource-dir)/lib/wasi/)
        mkdir -p $WASI_DIR
        cp download/lib/wasi/libclang_rt.builtins-wasm32.a $WASI_DIR
        make test
      # The older version of Clang does not provide the expected symbol for the
      # test entrypoints: `undefined symbol: __main_argc_argv`.
      # The older (<15.0.7) version of wasm-ld does not provide `__heap_end`,
      # which is required by our malloc implementation.
      if: matrix.os == 'ubuntu-latest' && matrix.clang_version != '10.0.0'

    - uses: actions/upload-artifact@v1
      with:
        # Upload the sysroot folder. Give it a name according to the OS it was built for.
        name: ${{ format( 'sysroot-{0}.tgz', matrix.os) }}
        path: sysroot

    - name: Build libc + threads
      # Only build the thread-capable wasi-libc in the latest supported Clang
      # version; the earliest version does not have all necessary builtins
      # (e.g., `__builtin_wasm_memory_atomic_notify`).
      if: matrix.clang_version != '10.0.0'
      shell: bash
      run: make -j4 THREAD_MODEL=posix

  # Disable the headerstest job for now, while WASI transitions from the
  # witx snapshots to wit proposals, and we have a few manual edits to the
  # generated header to make life easier for folks.
  headerstest:
    if: ${{ false }}  # Disable the headers test for now.
    name: wasi-headers test
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
    - uses: actions/checkout@v1
      with:
        submodules: true
    - name: Install Rust (rustup)
      shell: bash
      run: rustup update stable --no-self-update && rustup default stable
      if: matrix.os != 'macos-latest'
    - name: Install Rust (macos)
      run: |
        curl https://sh.rustup.rs | sh -s -- -y
        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
      if: matrix.os == 'macos-latest'
    - run: cargo fetch
      working-directory: tools/wasi-headers
    - run: cargo build
      working-directory: tools/wasi-headers
    - run: cargo test
      working-directory: tools/wasi-headers

  rustfmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v1
      with:
        submodules: true
    - name: Install Rust
      run: rustup update stable && rustup default stable && rustup component add rustfmt
    - run: cargo fmt -- --check
      working-directory: tools/wasi-headers