add_contributor.yml

name: Add Contributor to AUTHORS.md
on:
  pull_request:
      types:
        - opened
        - synchronize

jobs:
  add_contributor:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Check if contributor already exists
        id: check_contributor
        run: |
          exists=$(grep -c -F "$GITHUB_ACTOR" AUTHORS.md || true)
          if [[ $exists -gt 0 ]]; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Get contributor's full name
        id: get_full_name
        if: steps.check_contributor.outputs.exists == 'false'
        run: |
          username=$GITHUB_ACTOR
          access_token=$GITHUB_TOKEN
          full_name=$(curl -s -H "Authorization: token $access_token" "https://api.github.com/users/$username" | jq -r '.name')
          if [[ "$full_name" == "" || "$full_name" == "null" ]]; then
            full_name='-'
          fi
          echo "full_name=$full_name" >> $GITHUB_OUTPUT

      - name: Append contributor to AUTHORS.md
        id: append_contributor
        if: steps.check_contributor.outputs.exists == 'false'
        run: |
          full_name=${{ steps.get_full_name.outputs.full_name }}
          echo "| $full_name | $GITHUB_ACTOR |" >> AUTHORS.md

      - name: Commit and push changes to branch
        id: commit_changes
        if: steps.check_contributor.outputs.exists == 'false'
        uses: pre-commit-ci/lite-action@v1.0.1
        with:
          msg: Add ${{ env.GITHUB_ACTOR }} to AUTHORS.md