dependabot-approve-and-merge.yaml

name: Dependabot auto approve and merge
on: pull_request

# Docs: https://docs.github.com/en/code-security/dependabot/working-with-dependabot/automating-dependabot-with-github-actions#common-dependabot-automations

permissions:
  pull-requests: write
  contents: write

jobs:
  dependabot:
    runs-on: ubuntu-latest
    if: github.actor == 'dependabot[bot]'
    steps:
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@v2
        with:
          github-token: '${{ secrets.GITHUB_TOKEN }}'
      - name: Enable auto-merge
        run: |
          echo "enabling auto merge for dependency bump PR '$PR_URL'"
          gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}
          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
      - name: Approve the PR
        id: approval-minor-patch
        if: ${{ steps.metadata.outputs.update-type == 'version-update:semver-patch' ||  steps.metadata.outputs.update-type == 'version-update:semver-minor' }}
        run: |
          echo "approving minor or patch bump in PR '$PR_URL'"
          gh pr review --approve "$PR_URL"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}
          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
      - name: Report on skip of PR approval
        if: ${{ steps.approval-minor-patch.conclusion == 'skipped' }}
        run: echo "Not approving PR '$PR_URL' because dependency bump is not minor or patch (major, unknown non-SEMVER bump, etc)"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}