name: New Authors Check

on:
  pull_request:

jobs:
  check-id:
    name: New Author Check
    runs-on: ubuntu-latest
    steps:
      - name: Checkout PR code
        uses: actions/checkout@v3
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0
      - run: sudo apt -y install git
      - name: Export known authors from master branch
        run: git log --format="%an <%ae>" origin/master | sort | uniq > authors.txt
      - name: Export authors from new commits
        run: git log --format="%an <%ae>" origin/${GITHUB_BASE_REF}... | sort | uniq > commit-authors.txt
      - name: Check new authors
        run: |
          touch new-authors.txt
          while read -r author; do
             echo "Checking author: ${author}"
             if ! grep -q "^${author}\$" authors.txt; then
                 echo "ERROR: ${author} NOT FOUND"
                 echo "::warning ::New author found: ${author}"
                 echo "${author}" >> new-authors.txt
                 echo has_new_authors="yes" >> $GITHUB_ENV
             fi
          done < commit-authors.txt
      - run: mkdir new-authors
      - run: cp new-authors.txt new-authors
      - run: echo ${{ github.event.number }} > new-authors/pr-number.txt
      - run: ls -l
      - name: Upload new authors
        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3
        with:
          name: new-authors
          path: new-authors