reusable-update-pre-commit.yml

name: Reusable Update pre-commit
# Update pre-commit config and create PR if changes are detected
# author: Christoph Fröhlich <christoph.froehlich@ait.ac.at>

on:
  workflow_call:
    inputs:
      ref_for_scheduled_build:
        description: 'Reference on which the repo should be checkout for scheduled build. Usually is this name of a branch or a tag.'
        default: ''
        required: false
        type: string

jobs:
  auto_update_and_create_pr:
    runs-on: ubuntu-latest
    env:
      # this will be src/{repo-owner}/{repo-name}
      path: src/${{ github.repository }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          path: ${{ env.path }}
          ref: ${{ github.event.inputs.ref_for_scheduled_build }}

      - name: Install pre-commit
        run: |
          sudo apt-get install -qq python3-venv
          python3 -m venv .venv
          source .venv/bin/activate
          python3 -m pip install pre-commit

      - name: Auto-update with pre-commit
        run: |
          source .venv/bin/activate
          cd ${{ env.path }}
          pre-commit autoupdate || true  # Ignoring errors

      - name: Check for changes
        id: git_status
        run: |
          cd ${{ env.path }}
          git diff --quiet && echo "changed=false" >> $GITHUB_OUTPUT || echo "changed=true" >> $GITHUB_OUTPUT

      - name: There are changes
        if: steps.git_status.outputs.changed == 'true'
        run: |
          cd ${{ env.path }}
          git diff --exit-code || true

      - name: No changes!
        if: steps.git_status.outputs.changed == 'false'
        run: |
          echo "No changes detected"

      - name: Create Pull Request
        if: steps.git_status.outputs.changed == 'true'
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          branch: auto-update-${{ github.event.inputs.ref_for_scheduled_build }}
          commit-message: Bump version of pre-commit hooks
          title: Bump version of pre-commit hooks
          body: This pull request contains auto-updated files of the pre-commit config. @ros-controls/ros2-maintainers please run the pre-commit workflow manually on the branch `auto-update-${{ github.event.inputs.ref_for_scheduled_build }}` before merging.
          delete-branch: true
          draft: true
          path: ${{ env.path }}