4jcraft/.github/workflows/clang-format-all.yml

name: Clang Format All

on:
  workflow_dispatch:
    inputs:
      commit_changes:
        description: Commit formatted changes back to the selected branch
        required: true
        default: false
        type: boolean

permissions:
  contents: write

jobs:
  clang-format-all:
    runs-on: ubuntu-24.04
    concurrency:
      group: clang-format-all-${{ github.ref }}
      cancel-in-progress: true
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.ref }}

      - name: Install clang-format
        run: |
          sudo apt-get update
          sudo apt-get install -y clang-format-19

      - name: Format tracked C/C++ files
        env:
          CLANG_FORMAT_BIN: clang-format-19
        run: |
          bash ./.github/scripts/run-clang-format-all.sh apply

      - name: Export patch
        id: patch
        run: |
          if git diff --quiet; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          git diff --binary > clang-format-all.patch
          echo "changed=true" >> "$GITHUB_OUTPUT"

      - name: Upload patch artifact
        if: steps.patch.outputs.changed == 'true'
        uses: actions/upload-artifact@v4
        with:
          name: clang-format-all-${{ github.sha }}
          path: clang-format-all.patch
          retention-days: 7

      - name: Commit formatted changes
        if: steps.patch.outputs.changed == 'true' && github.event.inputs.commit_changes == 'true'
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add -A
          git commit -m "Run clang-format over tracked sources"
          git push origin HEAD:${GITHUB_REF_NAME}

      - name: Report no-op run
        if: steps.patch.outputs.changed == 'false'
        run: echo "clang-format produced no changes."