check-for-spammy-prs.yml

name: Close certain spammy PRs

# **What it does**: This action closes spammy pull requests in the open-source repository that have the title 'Revert "Repo sync" or contain an empty commit.
# **Why we have it**: We get lots of spam in the open-source repository.
# **Who does it impact**: Open-source contributors.

on:
  # Needed in lieu of `pull_request` so that PRs from a fork can be
  # closed when marked as invalid.
  pull_request_target:
    types: [opened]

permissions:
  contents: read
  issues: write
  pull-requests: write

jobs:
  close_empty_pr:
    if: github.repository == 'github/docs'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Get PR details
        id: pr_details
        uses: octokit/request-action@v2
        with:
          route: GET /repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}
          mediaType: '{"accept":"application/vnd.github.v3+json"}'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Save output to a file and then to environment
        run: |
          echo "${{ steps.pr_details.outputs.data }}" > pr_details.json
          echo "files_count=$(jq --arg pr_details.json)" >> $GITHUB_ENV

      - name: Add invalid label to PR if no files are changed
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        if: github.event.pull_request.title == 'Revert "Repo sync"' || env.files_count.changed_files == '0'
        run: gh issue edit "${{ github.event.pull_request.number }}" --add-label "invalid"