name: Pull request closer

on:
  pull_request_target:
    types: [opened,reopened]
jobs:
  close-fork-pull-request:
    runs-on: ubuntu-latest
    if: github.event.pull_request.head.repo.full_name != github.repository
    steps:
      - name: close pull request
        run: |
          pull_request_id='${{ github.event.pull_request.number }}'
          echo closing pull request "${pull_request_id}" in repository "${GITHUB_REPOSITORY}"
          curl \
          --request PATCH \
          --header "Accept: application/vnd.github.v3+json" \
          --header 'authorization: Bearer ${{ secrets.GITHUB_TOKEN }}' \
          "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${pull_request_id}" \
          --data '{"state":"closed"}'