.github/workflows/auto_update_submodule.yml

    
name: 'Auto-update Submodules'

on:
  #workflow_dispatch:
  #schedule:
  #  - cron: "0 0 * * *"

jobs:
  sync:
    name: 'Auto-update Submodules'
    runs-on: ubuntu-latest

    # Use the Bash shell regardless whether the GitHub Actions runner is ubuntu-latest, macos-latest, or windows-latest
    defaults:
      run:
        shell: bash

    steps:
    # Checkout the repository to the GitHub Actions runner
    - name: Checkout
      uses: actions/checkout@v2
      with:
        submodules: true
    
    # Git config
    - name: Git Configurations
      run: |
        git config --global user.name 'Git bot'
        git config --global user.email 'bot@noreply.github.com'
        
    # Update references
    - name: Git Sumbodule Update
      run: |
        git submodule update --init --recursive
        git submodule update --remote --recursive

    - name: Commit update
      run: |
        git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}
        git commit -am "Auto updated submodule references" && git push || echo "No changes to commit"