dependabot_approve_and_label.yml

name: approve_and_label
on: 
  pull_request:
    types: [opened, reopened]
    
permissions:
  contents: write
  issues: write
  pull-requests: write
    
jobs:
  evaluate_dependabot_pr:
    runs-on: ubuntu-latest
    name: Parse Dependabot PR title
    # Don't process PRs from forked repos
    if:
      github.event.pull_request.head.repo.full_name == github.repository
    outputs:
      dependency_name: ${{ steps.parse_dependabot_pr_automerge.outputs.dependency_name }}
      version_from: ${{ steps.parse_dependabot_pr_automerge.outputs.version_from }}
      version_to: ${{ steps.parse_dependabot_pr_automerge.outputs.version_to }}
      is_auto_merge_candidate: ${{ steps.parse_dependabot_pr_automerge.outputs.is_interesting_package }}
      is_auto_release_candidate: ${{ steps.parse_dependabot_pr_autorelease.outputs.is_interesting_package }}
      semver_increment: ${{ steps.parse_dependabot_pr_automerge.outputs.semver_increment }}
    steps:
      - uses: actions/checkout@v3
      - name: Read pr-autoflow configuration
        id: get_pr_autoflow_config
        uses: endjin/pr-autoflow/actions/read-configuration@v4
        with:
          config_file: .github/config/pr-autoflow.json
      - name: Dependabot PR - AutoMerge Candidate
        id: parse_dependabot_pr_automerge
        uses: endjin/pr-autoflow/actions/dependabot-pr-parser@v4
        with:
          pr_title: ${{ github.event.pull_request.title }}
          package_wildcard_expressions: ${{ steps.get_pr_autoflow_config.outputs.AUTO_MERGE_PACKAGE_WILDCARD_EXPRESSIONS }}
      - name: Dependabot PR - AutoRelease Candidate
        id: parse_dependabot_pr_autorelease
        uses: endjin/pr-autoflow/actions/dependabot-pr-parser@v4
        with:
          pr_title: ${{ github.event.pull_request.title }}
          package_wildcard_expressions: ${{ steps.get_pr_autoflow_config.outputs.AUTO_RELEASE_PACKAGE_WILDCARD_EXPRESSIONS }}
      - name: debug
        run: |
          echo "dependency_name : ${{ steps.parse_dependabot_pr_automerge.outputs.dependency_name }}"
          echo "is_interesting_package (merge) : ${{ steps.parse_dependabot_pr_automerge.outputs.is_interesting_package }}"
          echo "is_interesting_package (release) : ${{ steps.parse_dependabot_pr_autorelease.outputs.is_interesting_package }}"
          echo "semver_increment : ${{ steps.parse_dependabot_pr_automerge.outputs.semver_increment }}"
  
  approve:
    runs-on: ubuntu-latest
    needs: evaluate_dependabot_pr
    name: Approve auto-mergeable dependabot PRs
    if: |
      (github.actor == 'dependabot[bot]' || github.actor == 'dependjinbot[bot]' || github.actor == 'nektos/act') &&
      needs.evaluate_dependabot_pr.outputs.is_auto_merge_candidate == 'True'
    steps:
      - name: Show PR Details
        run: |
          echo "<------------------------------------------------>"
          echo "dependency_name  : ${{needs.evaluate_dependabot_pr.outputs.dependency_name}}"
          echo "semver_increment : ${{needs.evaluate_dependabot_pr.outputs.semver_increment}}"
          echo "auto_merge       : ${{needs.evaluate_dependabot_pr.outputs.is_auto_merge_candidate}}"
          echo "auto_release     : ${{needs.evaluate_dependabot_pr.outputs.is_auto_release_candidate}}"
          echo "from_version     : ${{needs.evaluate_dependabot_pr.outputs.version_from}}"
          echo "to_version       : ${{needs.evaluate_dependabot_pr.outputs.version_to}}"
          echo "<------------------------------------------------>"
        shell: bash
      - name: Approve pull request
        if: |
          needs.evaluate_dependabot_pr.outputs.is_auto_merge_candidate == 'True' &&
          (needs.evaluate_dependabot_pr.outputs.semver_increment == 'minor' || needs.evaluate_dependabot_pr.outputs.semver_increment == 'patch')
        run: |
          gh pr review "${{ github.event.pull_request.html_url }}" --approve -b "Thank you dependabot 🎊"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: 'Update PR body'
        if: |
          needs.evaluate_dependabot_pr.outputs.is_auto_merge_candidate == 'True' &&
          (needs.evaluate_dependabot_pr.outputs.semver_increment == 'minor' || needs.evaluate_dependabot_pr.outputs.semver_increment == 'patch')
        uses: actions/github-script@v6
        with:
          github-token: '${{ secrets.GITHUB_TOKEN }}'
          script: |
            await github.rest.pulls.update({
              owner: context.payload.repository.owner.login,
              repo: context.payload.repository.name,
              pull_number: context.payload.pull_request.number,
              body: "Bumps '${{needs.evaluate_dependabot_pr.outputs.dependency_name}}' from ${{needs.evaluate_dependabot_pr.outputs.version_from}} to ${{needs.evaluate_dependabot_pr.outputs.version_to}}"
            })

  check_for_norelease_label:
    runs-on: ubuntu-latest
    outputs:
      no_release: ${{ steps.check_for_norelease_label.outputs.result }}
    steps:
    - name: Check for 'no_release' label on PR
      id: check_for_norelease_label
      uses: actions/github-script@v6
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        script: |
            const labels = await github.rest.issues.listLabelsOnIssue({
              owner: context.payload.repository.owner.login,
              repo: context.payload.repository.name,
              issue_number: context.payload.number
            });
            core.info("labels: " + JSON.stringify(labels.data))
            if ( labels.data.map(l => l.name).includes("no_release") ) {
              core.info("Label found")
              return true
            }
            return false
    - name: Display 'no_release' status
      run: |
        echo "no_release: ${{ steps.check_for_norelease_label.outputs.result }}"

  label_auto_merge:
    runs-on: ubuntu-latest
    needs: 
    - evaluate_dependabot_pr
    - check_for_norelease_label
    name: 'Automerge & Label'
    steps:
      # Get a token for a different identity so any auto-merge that happens in the next step is
      # able to trigger other workflows (i.e. our 'auto_release' workflow)
      # NOTE: This requires the app details to be defined as 'Dependabot' secrets, rather than
      #       the usual 'Action' secrets as this workflow is triggered by Dependabot.
      - name: Generate token
        id: generate_token
        uses: tibdex/github-app-token@v1
        with:
          app_id: ${{ secrets.DEPENDJINBOT_APP_ID }}
          private_key: ${{ secrets.DEPENDJINBOT_PRIVATE_KEY }}
      # Run the auto-merge in the GitHub App context, so the event can trigger other workflows
      - name: 'Set dependabot PR to auto-merge'
        if: |
          (github.actor == 'dependabot[bot]' || github.actor == 'dependjinbot[bot]' || github.actor == 'nektos/act') &&
          needs.evaluate_dependabot_pr.outputs.is_auto_merge_candidate == 'True' &&
          (needs.evaluate_dependabot_pr.outputs.semver_increment == 'minor' || needs.evaluate_dependabot_pr.outputs.semver_increment == 'patch')
        run: |
            gh pr merge ${{ github.event.pull_request.number }} -R ${{ github.repository }} --auto --squash
        env:
          GITHUB_TOKEN: '${{ steps.generate_token.outputs.token }}'
      - name: 'Label non-dependabot PRs and auto-releasable dependabot PRs with "pending_release"'
        if: |
          needs.check_for_norelease_label.outputs.no_release == 'false' &&
          (
            (github.actor != 'dependabot[bot]' && github.actor != 'dependjinbot[bot]') ||
            needs.evaluate_dependabot_pr.outputs.is_auto_release_candidate == 'True'
          )
        uses: actions/github-script@v6
        with:
          github-token: '${{ secrets.GITHUB_TOKEN }}'
          script: |
            await github.rest.issues.addLabels({
              owner: context.payload.repository.owner.login,
              repo: context.payload.repository.name,
              issue_number: context.payload.pull_request.number,
              labels: ['pending_release']
            })