name: Build PR (Dependabot)

on: pull_request_target

jobs:
  build:
    runs-on: ${{ matrix.os }}
    if: ${{ github.actor == 'dependabot[bot]' }}
    strategy:
      matrix:
        node-version: [12.x]
        os: [ubuntu-latest]
    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: Use Node.js ${{ matrix.node_version }}
        uses: actions/setup-node@v1
        with:
          node-version: ${{ matrix.node_version }}
      - name: npm install, build, and test
        run: |
          npm install
          npm run coverage
        env:
          CI: true
      - name: Merge PR
        if: success()
        uses: "actions/github-script@v2"
        with:
          github-token: "${{ secrets.GH_KEY }}"
          script: |
            const pullRequest = context.payload.pull_request
            const repository = context.repo

            await github.pulls.merge({
              merge_method: "merge",
              owner: repository.owner,
              pull_number: pullRequest.number,
              repo: repository.repo,
            })
      - name: Reject PR
        if: failure()
        uses: peter-evans/close-pull@v1
        with:
          pull-request-number: ${{github.event.number}}
          comment: "Closing PR due to failing tests."
          delete-branch: true