name: Dependabot Auto-Merge

on:
  pull_request_target:
    types: [opened, synchronize]

permissions:
  contents: write
  pull-requests: write

jobs:
  auto-merge:
    if: ${{ github.actor == 'dependabot[bot]' }}
    runs-on: ubuntu-latest
    steps:
      - name: Fetch metadata
        id: metadata
        uses: dependabot/fetch-metadata@v1
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"

      - name: Approve PR
        run: gh pr review --approve "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Enable auto-merge
        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 }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}