# Check all pull requests against the clang-format rules.

name: Clang Format

# Controls when the action will run.
# Run clang-format checks on all pull-requests
on:
  pull_request:
    paths:
    - 'src/**.cpp'
    - 'src/**.h'

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  clang-format-check:
    timeout-minutes: 5

    # Ubuntu 18.04 at the time of writing includes clang-format-9 as default
    runs-on: [ubuntu-20.04]

    # We want to check all changed files between the pull-request base and the head of the pull request
    env:
      FORMAT_BASE: ${{ github.base_ref }}

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:

    # Checkout the repository as $GITHUB_WORKSPACE
    - uses: actions/checkout@v2

    # Make sure to include the base we want to merge into
    - run: |
        git fetch --no-tags --depth=1 origin ${{ github.base_ref }}:${{ github.base_ref }}

    # Run the clang-format command (in $GITHUB_WORKSPACE, which is where the repo is checked out to)
    - name: Run clang-format
      run: ./scripts/clang-format.sh