.github/workflows/ci.yml

name: IWYU CI

on:
  - push
  - pull_request

defaults:
  run:
    shell: bash

jobs:
  build:
    runs-on: ubuntu-18.04
    strategy:
      fail-fast: false

    env:
      LLVM_TAG: -12

    steps:
      - name: Install prerequisites
        run: |
          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
          sudo add-apt-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic$LLVM_TAG main"
          sudo apt update
          sudo apt install -y ninja-build
          # Remove any base dist LLVM/Clang installations
          sudo apt remove -y "libclang-dev*"
          sudo apt remove -y "clang*"
          sudo apt remove -y "llvm*"
          # Reinstall tagged versions
          sudo apt install -y llvm$LLVM_TAG-dev
          sudo apt install -y libclang$LLVM_TAG-dev
          sudo apt install -y clang$LLVM_TAG

      - name: Check out default branch
        uses: actions/checkout@v2

      - name: Build include-what-you-use
        run: |
          mkdir build
          cd ./build
          cmake -G Ninja \
                -DCMAKE_C_COMPILER=clang$LLVM_TAG \
                -DCMAKE_CXX_COMPILER=clang++$LLVM_TAG \
                -DCMAKE_INSTALL_PREFIX=./ \
                ../
          ninja

      - name: Test include-what-you-use
        run: |
          cd ./build
          CTEST_OUTPUT_ON_FAILURE=1 ctest -j 6

      - name: Test install
        run: |
          cd ./build
          cmake --install .

      - name: Check license headers
        run: |
          git ls-tree --full-tree --name-only -r HEAD | \
              xargs ./iwyu-check-license-header.py