# This workflow creates a new PR in Grafana which is triggered after a release is completed.
# It should include all code changes that are needed after a release is done. This includes the changelog update and
# version bumps, but could include more in the future.
# Please refrain from including any processes that do not result in code changes in this workflow. Instead, they should
# either be triggered in the release promotion process or in the release comms process (that is triggered by merging
# this PR).
name: Complete a Grafana release
on:
  workflow_dispatch:
    inputs:
      previous_version:
        type: string
        required: false
        description: 'The release version (semver, git tag, branch or commit) to use for comparison'
      version:
        required: true
        type: string
        description: The version of Grafana that is being released
      target:
        required: true
        type: string
        description: The base branch that these changes are being merged into
      backport:
        required: false
        type: string
        description: Branch to backport these changes to
      dry_run:
        required: false
        default: false
        type: boolean
      latest:
        required: false
        default: false
        type: boolean

permissions:
  contents: write
  pull-requests: write

jobs:
  push-changelog-to-main:
    name: Create PR to main to update the changelog
    uses: ./.github/workflows/changelog.yml
    with:
      previous_version: ${{inputs.previous_version}}
      version: ${{ inputs.version }}
      latest: ${{ inputs.latest }}
      dry_run: ${{ inputs.dry_run }}
      target: main
    secrets:
      GRAFANA_DELIVERY_BOT_APP_ID: ${{ secrets.GRAFANA_DELIVERY_BOT_APP_ID }}
      GRAFANA_DELIVERY_BOT_APP_PEM: ${{ secrets.GRAFANA_DELIVERY_BOT_APP_PEM }}
  create-prs:
    name: Create Release PR
    runs-on: ubuntu-latest
    if: github.repository == 'grafana/grafana'
    steps:
      - name: Generate bot token
        id: generate_token
        uses: tibdex/github-app-token@b62528385c34dbc9f38e5f4225ac829252d1ea92
        with:
          app_id: ${{ secrets.GRAFANA_DELIVERY_BOT_APP_ID }}
          private_key: ${{ secrets.GRAFANA_DELIVERY_BOT_APP_PEM }}
      - name: Checkout Grafana
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.target }}
          fetch-depth: 0
          fetch-tags: true
      - name: Checkout Grafana (main)
        uses: actions/checkout@v4
        with:
          ref: main
          fetch-depth: '0'
          fetch-tags: 'false'
          path: .grafana-main
      - name: Setup nodejs environment
        uses: actions/setup-node@v4
        with:
          node-version-file: .nvmrc
      - name: Configure git user
        run: |
          git config --local user.name "github-actions[bot]"
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local --add --bool push.autoSetupRemote true

      - name: Create branch
        run: git checkout -b "release/${{ github.run_id }}/${{ inputs.version }}"
      - name: Generate changelog
        id: changelog
        uses: ./.grafana-main/.github/workflows/actions/changelog
        with:
          github_token: ${{ steps.generate_token.outputs.token }}
          target: v${{ inputs.version }}
          output_file: changelog_items.md
      - name: Patch CHANGELOG.md
        run: |
          # Prepare CHANGELOG.md content with version delimiters
          (
            echo
            echo "# ${{ inputs.version}} ($(date '+%F'))"
            echo
            cat changelog_items.md
          ) > CHANGELOG.part

          # Check if a version exists in the changelog
          if grep -q "<!-- ${{ inputs.version}} START" CHANGELOG.md ; then
            # Replace the content between START and END delimiters
            echo "Version ${{ inputs.version }} is found in the CHANGELOG.md, patching contents..."
            sed -i -e '/${{ inputs.version }} START/,/${{ inputs.version }} END/{//!d;}' \
                   -e '/${{ inputs.version }} START/r CHANGELOG.part' CHANGELOG.md
          else
            # Prepend changelog part to the main changelog file
            echo "Version ${{ inputs.version }} not found in the CHANGELOG.md"
            (
              echo "<!-- ${{ inputs.version }} START -->"
              cat CHANGELOG.part
              echo "<!-- ${{ inputs.version }} END -->"
              cat CHANGELOG.md
            ) > CHANGELOG.tmp
            mv CHANGELOG.tmp CHANGELOG.md
          fi

          rm -f CHANGELOG.part changelog_items.md

          git diff CHANGELOG.md
          
      - name: "Prettify CHANGELOG.md"
        run: npx prettier --write CHANGELOG.md
      - name: Commit CHANGELOG.md changes
        run: git add CHANGELOG.md && git commit --allow-empty -m "Update changelog" CHANGELOG.md

      - name: Update package.json versions
        uses: ./.grafana-main/pkg/build/actions/bump-version
        with:
          version: 'patch'

      - name: Add package.json changes
        run: |
          git add package.json lerna.json yarn.lock packages public
          git commit -m "Update version to ${{ inputs.version }}"

      - name: Git push
        if: ${{ inputs.dry_run }} != true
        run: git push --set-upstream origin release/${{ github.run_id }}/${{ inputs.version }}

      - name: Create PR without backports
        if: "${{ inputs.backport == '' }}"
        run: >
          gh pr create \
            $( [ "x${{ inputs.latest }}" == "xtrue" ] && printf %s '-l "release/latest"') \
            -l "no-changelog" \
            --dry-run=${{ inputs.dry_run }} \
            -B "${{ inputs.target }}" \
            --title "Release: ${{ inputs.version }}" \
            --body "These code changes must be merged after a release is complete"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Create PR with backports
        if: "${{ inputs.backport != '' }}"
        run: >
          gh pr create \
            $( [ "x${{ inputs.latest }}" == "xtrue" ] && printf %s '-l "release/latest"') \
            -l "product-approved" \
            -l "no-changelog" \
            --dry-run=${{ inputs.dry_run }} \
            -B "${{ inputs.target }}" \
            --title "Release: ${{ inputs.version }}" \
            --body "These code changes must be merged after a release is complete"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}