name: "Creates Batch Release for a Package"

on:
  repository_dispatch:
    types: [batch-release-pr]

env:
  HEAD_BRANCH_NAME: ${{ github.event.client_payload.package }}-${{ github.run_id }}-${{ github.run_attempt }}

jobs:
  create_batch_release_branch:
    runs-on: ubuntu-latest
    permissions:
      contents: write # Grants write permission to create a branch.
    outputs:
      head_branch_created: ${{ steps.check-branch-exists.outputs.exists }}
      release_branch: ${{ steps.create-branch.outputs.release_branch }} # e.g. release-go_router-17.2.2, returned by branches-for-batch-release tool.
    steps:
      - name: checkout repository
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
        with:
          token: ${{ secrets.FLUTTERGITHUBBOT_TOKEN }}
          persist-credentials: false
      - name: "Install Flutter"
        uses: ./.github/workflows/internals/install_flutter
      - name: Set up tools
        run: dart pub get
        working-directory: ${{ github.workspace }}/script/tool
      # This step is to create branches for a batch release
      # Branches may not be created if there is nothing to release.
      # In that case, the workflow will exit and complete successfully.
      - name: create batch release branch
        id: create-branch
        run: |
          gh auth setup-git
          git config --global user.name "flutteractionsbot"
          git config --global user.email "fluttergithubbot@gmail.com"
          dart ./script/tool/lib/src/main.dart branches-for-batch-release --packages=${GITHUB_EVENT_CLIENT_PAYLOAD_PACKAGE} --branch=${HEAD_BRANCH_NAME} --remote=origin
        env:
          GITHUB_EVENT_CLIENT_PAYLOAD_PACKAGE: ${{ github.event.client_payload.package }}
          GH_TOKEN: ${{ secrets.FLUTTERGITHUBBOT_TOKEN }}
      - name: Check if branch was created
        id: check-branch-exists
        run: |
          if git show-ref --verify --quiet refs/heads/${HEAD_BRANCH_NAME}; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

  create_release_pr:
    needs: create_batch_release_branch
    if: needs.create_batch_release_branch.outputs.head_branch_created == 'true'
    runs-on: ubuntu-latest
    permissions:
      # The create-pull-request action needs both content and pull-requests permissions.
      pull-requests: write
      contents: write
    steps:
      - name: checkout repository
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
        with:
          ref: ${{ env.HEAD_BRANCH_NAME }}
          persist-credentials: false
      - name: Create batch release PR
        run: |
          gh auth setup-git
          gh pr create \
            --base "${NEEDS_CREATE_BATCH_RELEASE_BRANCH_OUTPUTS_RELEASE_BRANCH}" \
            --head "${HEAD_BRANCH_NAME}" \
            --title "[${GITHUB_EVENT_CLIENT_PAYLOAD_PACKAGE}] Batch release" \
            --body "This PR was created automatically to batch release the \`${GITHUB_EVENT_CLIENT_PAYLOAD_PACKAGE}\`." \
            --label "override: batch-${GITHUB_EVENT_CLIENT_PAYLOAD_PACKAGE}"
        env:
          NEEDS_CREATE_BATCH_RELEASE_BRANCH_OUTPUTS_RELEASE_BRANCH: ${{ needs.create_batch_release_branch.outputs.release_branch }}
          GITHUB_EVENT_CLIENT_PAYLOAD_PACKAGE: ${{ github.event.client_payload.package }}
          GH_TOKEN: ${{ secrets.FLUTTERGITHUBBOT_TOKEN }}