name: "Auto-merge Dependabot"

on:
  pull_request:

jobs:
  automerge:
    name: "Check and merge PR"

    if: ${{ github.actor == 'dependabot[bot]' }}

    runs-on: "ubuntu-latest"

    steps:
      - name: "Generate GitHub App token"
        uses: "actions/create-github-app-token@v1"
        id: "app-token"
        with:
          app-id: ${{ vars.APP_ID }}
          private-key: ${{ secrets.PRIVATE_KEY }}

      - name: "Fetch metadata"
        uses: "dependabot/fetch-metadata@v2"
        id: "metadata"
        with:
          github-token: ${{ steps.app-token.outputs.token }}

      - name: "Enable auto-merge"
        if: ${{ steps.metadata.outputs.update-type == 'version-update:semver-patch' || steps.metadata.outputs.update-type == 'version-update:semver-minor' }}
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          PR: ${{ github.event.pull_request.html_url }}
        run: |
          gh pr merge --auto --squash "$PR"