cherry-pick-to-release-branch.yml

name: PR for release branch
on:
  pull_request:
    branches:
      - main
    types: ["closed", "labeled"]

jobs:
  get-release-branches:
    if: |
      github.event.pull_request.merged &&
      ((github.event.action == 'labeled' && startsWith(github.event.label.name, 'need-cherry-pick')) ||
      (github.event.action == 'closed' && contains(toJson(github.event.pull_request.labels), 'need-cherry-pick')))
    runs-on: ubuntu-latest
    outputs:
      branches: ${{ steps.get-release-branches.outputs.branches }}
    steps:
      - name: Get release branches
        id: get-release-branches
        run: |
          if [[ ${{ github.event.action }} == 'labeled' ]]; then
            echo "branches=[\"$(echo ${{ github.event.label.name }} | cut -d '-' -f 4-)\"]" >> "$GITHUB_OUTPUT"
          else
            labels='${{ toJson(github.event.pull_request.labels) }}'
            echo branches=$(echo "$labels" | jq -r '.[] | select(.name | contains("need-cherry-pick")).name' | cut -d '-' -f 4- | jq --raw-input . | jq --slurp . -c) >> "$GITHUB_OUTPUT"
          fi

  release_pull_request:
    needs:
      - get-release-branches
    runs-on: ubuntu-latest
    strategy:
      matrix:
        branch: ${{ fromJson(needs.get-release-branches.outputs.branches) }}
    steps:
      - name: checkout
        uses: actions/checkout@v4
      - name: Create PR to branch
        uses: risingwavelabs/github-action-cherry-pick@master
        with:
          pr_branch: ${{ matrix.branch }}
          pr_labels: 'cherry-pick'
          pr_body: ${{ format('Cherry picking \#{0} onto branch {1}', github.event.number, matrix.branch) }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

permissions:
  issues: write
  pull-requests: write
  contents: write