disallow-submodules.yml

name: "Disallow submodules"
permissions: read-all

on:
  pull_request

jobs:
  disallow-submodules:
    runs-on: ubuntu-22.04
    steps:
    - name: Checkout repository
      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.2
    - name: Check for submodules
      run: |
        output=$(git submodule status --recursive 2>&1)
        if [ ! -z $output ]; then
          echo $output
          echo "Submodules are not allowed"
          exit 1
        else
          echo "No submodules found"
        fi