update-submodules.yml

name: Update submodules (theme)

# Controls when the action will run.
on:
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  # This workflow contains a single job called "update"
  update:
    runs-on: ubuntu-latest

    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v4

      - name: Pull & update submodules recursively
        run: |
          git submodule update --init --recursive
          git submodule update --recursive --remote

      - name: Commit & push changes
        run: |
          DATE=$(date '+%Y%m%d-%H%M')
          BRANCH_NAME="update-submodules/update-$DATE"
          # Setup the committers identity.
          git config user.email "actions@github.com"
          git config user.name "GitHub Actions - update theme submodule"

          git checkout -b $BRANCH_NAME
          git submodule update --init --recursive
          git submodule update --recursive --remote
          
          git commit -am "Update submodules"
          git push origin $BRANCH_NAME

      - name: create pull request
        run:  |
          DATE=$(date '+%Y%m%d-%H%M')
          BRANCH_NAME="update-submodules/update-$DATE"
          gh pr create \
          -B main \
          -H $BRANCH_NAME \
          --title "Update site submodules" \
          --body "Created by Github action"
        env:
            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}