name: LLVM Tests

env:
  release_major: 10

on:
  push:
    branches:
      - 'release/**'
    paths:
      - 'llvm/**'
      - '.github/workflows/llvm-tests.yml'
  pull_request:
    paths:
      - 'llvm/**'
      - '.github/workflows/llvm-tests.yml'

jobs:
  build_llvm:
    name: llvm check-all
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - ubuntu-latest
          - windows-latest
          - macOS-latest
    steps:
    - name: Setup Windows
      if: startsWith(matrix.os, 'windows')
      uses: llvm/actions/setup-windows@master
      with:
        arch: amd64
    - name: Install Ninja
      uses: llvm/actions/install-ninja@master
    - uses: actions/checkout@v1
      with:
        fetch-depth: 1
    - name: Test llvm
      uses: llvm/actions/build-test-llvm-project@master
      with:
        cmake_args: -G Ninja -DCMAKE_BUILD_TYPE=Release

  abi-dump:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        name:
          - build-baseline
          - build-latest
        include:
          - name: build-baseline
            # FIXME: Referencing the env context does not work here
            # ref: llvmorg-${{ env.release_major }}.0.0
            ref: llvmorg-10.0.0
            repo: llvm/llvm-project
          - name: build-latest
            ref: ${{ github.sha }}
            repo: ${{ github.repository }}
    steps:
    - name: Install Ninja
      uses: llvm/actions/install-ninja@master
    - name: Install abi-compliance-checker
      run: |
        sudo apt-get install abi-dumper autoconf pkg-config
    - name: Install universal-ctags
      run: |
        git clone https://github.com/universal-ctags/ctags.git
        cd ctags
        ./autogen.sh
        ./configure
        sudo make install
    - name: Download source code
      uses: llvm/actions/get-llvm-project-src@master
      with:
        ref: ${{ matrix.ref }}
        repo: ${{ matrix.repo }}
    - name: Configure
      run: |
        mkdir build
        cd build
        cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD="" -DLLVM_BUILD_LLVM_DYLIB=ON -DCMAKE_C_FLAGS_DEBUG="-g -Og" -DCMAKE_CXX_FLAGS_DEBUG="-g -Og" ../llvm
    - name: Build
      run: ninja -C build libLLVM-${{ env.release_major }}.so
    - name: Dump ABI
      run: abi-dumper -lver ${{ matrix.ref }} -skip-cxx -public-headers llvm/include -o ${{ matrix.ref }}.abi.tar.gz build/lib/libLLVM-${{ env.release_major }}.so
    - name: Upload ABI file
      uses: actions/upload-artifact@v1
      with:
        name: ${{ matrix.name }}
        path: ${{ matrix.ref }}.abi.tar.gz

  abi-compare:
    runs-on: ubuntu-latest
    needs:
      - abi-dump
    steps:
      - name: Download baseline
        uses: actions/download-artifact@v1
        with:
          name: build-baseline
      - name: Download latest
        uses: actions/download-artifact@v1
        with:
          name: build-latest
      - name: Install abi-compliance-checker
        run: sudo apt-get install abi-compliance-checker
      - name: Compare ABI
        run: abi-compliance-checker -l libLLVM-${{ env.release_major}}.so -old build-baseline/*.tar.gz -new build-latest/*.tar.gz
      - name: Upload ABI Comparison
        if: always()
        uses: actions/upload-artifact@v1
        with:
          name: compat-report-${{ github.sha }}
          path: compat_reports/