GitHub Action that checkouts the repository, gets a list of recently changed files, creates Zip archives of top-level directories and commits them back to the repo.

zip-top-level-directories.yml

# source: https://gist.github.com/srflp/2da77871ed5e41edab913b3aaac85ba9

# put this file in <your-repo>/.github/workflows/zip-top-level-directories.yml

name: Zip top-level directories
on:
  push:
    branches:
      - main
jobs:
  Zip:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      
    - name: Get a list of recently changed files
      id: files
      uses: jitterbit/get-changed-files@v1

    - name: Zip top-level folders with their contents
      run: echo -e ${{ steps.files.outputs.all }} |
        tr ' ' '\n' |
        cut -d/ -f1 |
        sort -u | 
        egrep "^[^\.]" |
        xargs -n1 -I % sh -c '[ -d % ] && echo "Zipping %..." && zip -r %.zip % || true'

    - name: Commit created/updated Zip file(s)
      run: |
        git config user.name "ZipBot"
        git config user.email "<>"
        git add .
        git commit -m "Create and/or update Zip file(s)" || echo "No changes to commit"
        git push