name: Update AUTHORS File

on:
  push:
    branches:
      - main

jobs:
  update-authors:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Generate AUTHORS file (Name <email> format)
        run: |
          git log --format='%aN <%aE>' | sort -u > AUTHORS

      - name: Check if AUTHORS file changed
        run: |
          if git diff --quiet AUTHORS; then
            echo "No changes in AUTHORS file."
            exit 0
          fi

      - name: Commit and push changes
        uses: EndBug/add-and-commit@v9.1.4
        with:
          push: true
          add: "AUTHORS"
          default_author: github_actions
          message: "Update AUTHORS file automatically"