---
name: Dependabot auto-merge

on: pull_request

permissions:
  contents: write
  pull-requests: write

jobs:
  auto-merge:
    # Enable auto-merge for minor/patch dependency bumps; majors stay manual.
    # The merge only happens once every required status check (make test) is
    # green, so the CI stays the gate.
    if: github.actor == 'dependabot[bot]'
    runs-on: ubuntu-latest
    steps:
      - name: Fetch dependency metadata
        id: metadata
        uses: dependabot/fetch-metadata@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Enable auto-merge (minor + patch)
        if: steps.metadata.outputs.update-type != 'version-update:semver-major'
        run: gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}