name: Check for Empty Cells

on:
  pull_request:
    branches: [main]
    paths:
      - '**/*.py'

jobs:
  check-empty-cells:
    name: Check for empty cells in marimo notebooks
    runs-on: ubuntu-latest
    steps:
      - name: 🛑 Cancel Previous Runs
        uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # 0.12.1

      - name: 🔄 Checkout code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4

      - name: 🚀 Install uv
        uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4

      - name: 🐍 Set up Python
        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
        with:
          python-version: 3.12

      - name: 🔍 Check for empty cells
        run: |
          make check_empty

      - name: 📊 Report results
        if: failure()
        run: |
          echo "❌ Empty cells found in marimo notebooks!"
          echo "Please remove or add content to empty cells before merging."
          echo "Empty cells look like:"
          echo "@app.cell"
          echo "def _():"
          echo "    return"