name: Lint
on:
  push:
    paths:
      - 'src/*'
      - 'include/*'
  pull_request:
    paths:
      - 'src/*'
      - 'include/*'

jobs:
  build:
    name: Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - run: sudo apt-get install -y astyle clang-tidy

      # lint files changed by the push/pr
      - id: files
        uses: trilom/file-changes-action@v1.2.4
        with:
          output: ' '
        continue-on-error: true
      - run: ./format.sh ${{ steps.files.outputs.files}}
        if: ${{ steps.files.outcome == 'success' }}
      - run: ./format.sh
        if: ${{ steps.files.outcome == 'failure' }}

      # fail if any files were changed by ./format.sh
      - id: files_formatted
        uses: jackton1/find-changed-files@v1.1
        with:
          files: src, include

      - name: Fail if any files reformatted
        if: steps.files_formatted.outputs.files_changed == 'true'
        run: exit 1