clang-format-run-pr.yml

name: clang-format-run-pr

# Controls when the workflow will run
on:
  issue_comment:
      types: [created]

env:
  CLANG_VERSION: 14

jobs:

  run-on-pr: 
    # Run on branchs, not forked PR branches
    if: |
      contains(github.event.comment.body, '/clang-format-run')

    runs-on:
      - ubuntu-latest

    steps:

    - name: Install clang tools
      run: |
        sudo apt-get install clang-format-${CLANG_VERSION}

    - uses: actions/github-script@v6
      id: get-pr
      with:
        script: |
          const request = {
            owner: context.repo.owner,
            repo: context.repo.repo,
            pull_number: context.issue.number
          }

          core.info(`Getting PR #${request.pull_number} from ${request.owner}/${request.repo}`)

          const acknowledge = {
            owner: context.repo.owner,
            repo: context.repo.repo,
            comment_id: context.payload.comment.id,
            content: 'rocket'
          }

          try {
            github.rest.reactions.createForIssueComment(acknowledge)
            const result = await github.rest.pulls.get(request)
            return result.data
          } catch (err) {
            core.setFailed(`Request failed with error ${err}`)
          }

    - uses: actions/checkout@v3
      with:
        repository: ${{ fromJSON(steps.get-pr.outputs.result).head.repo.full_name }}
        ref: ${{ fromJSON(steps.get-pr.outputs.result).head.ref }}
        fetch-depth: 0

    - name: clang-format-run
      run: |
          set +e
          # Don't return right away
          bash -e .github/workflows/clang-format-run.sh
          RETVAL=$?
          set -e

          if [[ $RETVAL -eq 0 ]]
          then
            exit 0
          fi

          # Files changed, not an error in this case
          if [[ $RETVAL -eq 1 ]]
          then
            exit 0
          fi

          # Unexpected error
          exit $RETVAL
          
    - name: Push reformatted files
      uses: EndBug/add-and-commit@v9.0.1
      with:
        add: '*'
        message: 'clang-format bot reformatting.'
        push: true