enable-automerge.yml

name: Dependabot - Enable Auto-Merge

# Dependabot Pull Requests Auto-Merge

# This workflow does not execute the merge itself. Instead, it serves as a filter that enables GitHub's native Automatic Merging feature when conditions are met.

# The auto-merge will be enabled only if the semantic version for the changes is MINOR or PATCH.
# Pull Requests with semantic versions MAJOR will need manual review and approval.

# Once the version filter has enabled Auto-Merge, the Pull Request will enter a waiting state until all required checks defined in the master Branch Protection Rules are passed.
# The secured process is: Safe Version → Enable Auto-Merge → Wait for CI Tests → Automatic Merge.

on:
  pull_request:
    branches: ["master", "main"] 

permissions:
  contents: write
  pull-requests: write

jobs:
  dependabot-automerge:
    runs-on: ubuntu-latest
    if: github.actor == 'dependabot[bot]'
    
    steps:
    
      - name: Obtain Dependabot Metadata
        id: metadata
        uses: dependabot/fetch-metadata@ffa630c65fa7e0ecfa0625b5ceda64399aea1b36 #v3.0.0
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"

      - name: Enable Auto-Merge
        if: ${{ steps.metadata.outputs.update-type == 'version-update:semver-minor' || steps.metadata.outputs.update-type == 'version-update:semver-patch' }}
        run: gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}