code_format.yml

name: Run clang-format

on:
  pull_request_target:
    branches:
      - '*'

permissions:
  contents: write

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
      - uses: DoozyX/clang-format-lint-action@v0.18.1
        with:
          extensions: 'c,cpp,h,hpp'
          clangFormatVersion: 18
          inplace: True
      - name: Detect formatting changes
        id: changes
        run: |
          if git diff --quiet --exit-code; then
            echo "has_changes=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          echo "has_changes=true" >> "$GITHUB_OUTPUT"
          {
            echo 'changed_files<<EOF'
            git diff --name-only
            echo 'EOF'
          } >> "$GITHUB_OUTPUT"
      - name: Classify pull request source
        id: pr_source
        run: |
          if [ "${{ github.event.pull_request.head.repo.full_name }}" = "${{ github.repository }}" ]; then
            echo "is_same_repo=true" >> "$GITHUB_OUTPUT"
          else
            echo "is_same_repo=false" >> "$GITHUB_OUTPUT"
          fi
      - name: Annotate formatting changes
        if: ${{ steps.changes.outputs.has_changes == 'true' }}
        run: |
          files='${{ steps.changes.outputs.changed_files }}'
          files="${files//$'\n'/%0A}"
          echo "::warning::clang-format updated these files:%0A$files"
      - name: Commit and push formatting fixes
        if: ${{ steps.changes.outputs.has_changes == 'true' && steps.pr_source.outputs.is_same_repo == 'true' }}
        run: |
          git config user.name "openastrotech-bot"
          git config user.email "openastrotech-bot@users.noreply.github.com"
          git add -A
          git commit -m "style: apply clang-format fixes"
          git push origin "HEAD:${{ github.event.pull_request.head.ref }}"
      - name: Fail for forked pull requests with formatting changes
        if: ${{ steps.changes.outputs.has_changes == 'true' && steps.pr_source.outputs.is_same_repo != 'true' }}
        run: |
          echo "Automatic formatting commits are only supported for branches in this repository." >&2
          exit 1