reset-on-merge.yml

name: Reset on merge

on:
  pull_request:
    types:
    - closed

jobs:
  reset:

    if: |
      github.event.pull_request.merged == true &&
      github.base_ref == 'akirak' &&
      github.head_ref == 'rebase-akirak' &&
      github.event.pull_request.head.repo.id == github.event.pull_request.base.repo.id

    runs-on: ubuntu-latest

    steps:

    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
        ref: ${{ github.base_ref }}

    - name: Tag the last head revision
      id: backup
      run: |
        tag="${{ github.base_ref }}-backup-$(date +'%Y%m%d%H%M%S')"
        git tag "$tag" "$(git rev-parse HEAD~1)"
        echo "tag=$tag" >> "$GITHUB_OUTPUT"

    - name: Push the tag
      uses: ad-m/github-push-action@master
      with:
        tags: true
        branch: ${{ steps.backup.outputs.tag }}

    - name: Reset
      run: |
        git fetch origin "$rev"
        git reset --hard "$rev"
      env:
        rev: ${{ github.head_ref }}

    - name: Push the resetted branch
      uses: ad-m/github-push-action@master
      with:
        branch: ${{ github.base_ref }}
        force: true