pick-to-staging.yml

name: Cherry pick staging PRs merged into main

on:
  pull_request:
    types:
      - closed
    branches:
      - 'main'


jobs:
  create-pr-for-staging:
    if: |
      github.event.pull_request.merged == true &&
      contains(github.event.pull_request.labels.*.name, 'staging')
    name: Create PR against staging branch
    runs-on: ubuntu-latest

    steps:
      - name: Checkout main
        uses: actions/checkout@v4
        with:
          ref: main
          fetch-depth: 2

      - name: Fetch and checkout latest staging branch
        run: |
          branch=$(git ls-remote --heads origin 'staging*' | tail -1 | awk 'gsub(".*refs/heads/","")')
          git fetch origin $branch
          git checkout $branch

      - name: Set git credentials
        run: |
          git config --global user.name openslides-automation
          git config --global user.email openslides-automation@users.noreply.github.com

      - name: Cherry-pick new commit
        id: cherry-pick
        run: |
          git fetch origin
          # -m 1 to also be able to cherry-pick merge commits
          git cherry-pick -m 1 ${{ github.sha }} || {
            echo "error=1" >> $GITHUB_OUTPUT
            git add .
            git cherry-pick --continue
          }

      - name: Generate access token
        uses: tibdex/github-app-token@v2
        id: generate-token
        with:
          app_id: ${{ secrets.AUTOMATION_APP_ID }}
          private_key: ${{ secrets.AUTOMATION_APP_PRIVATE_KEY }}

      - name: Create or update PR
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ steps.generate-token.outputs.token }}
          branch: apply/commit-${{ github.sha }}
          delete-branch: true
          title: "[Cherry-Pick] ${{ github.event.pull_request.title }}"
          body: "Triggered by commit [${{ github.sha }}](https://github.com/${{ github.repository }}/commit/${{ github.sha }})\n\n${{ steps.cherry-pick.outputs.error && 'There were conflicts during the cherry-pick. These were commited without any resolving. Please resolve them manually and push the result to this branch before merging.' || 'The cherry-pick was successful without any conflicts. You should be able to simply merge this PR.' }}"
          reviewers: ${{ github.event.pull_request.user.login }}
          assignees: ${{ github.event.pull_request.user.login }}
          labels: picked-to-staging
          milestone: 4