code: def configure_nfs_server():
      
      repos_for_export = get_all_repos(active_only=True, include_specs_repo=False)
  
      current_exports = _get_current_exports()
      needed_exports = _get_exports_for_repos(repos_for_export)
  
      _ensure_managed_repos_dir_exists()
  
      if not needed_exports.difference(current_exports):
          if not _server_is_running():
              _restart_server()
          return
  
      _write_exports_config(needed_exports)
      _restart_server()
docs: This function is used with `dusty up`.  It will check all active repos to see if
      they are exported.  If any are missing, it will replace current dusty exports with
      exports that are needed for currently active repos, and restart
      the nfs server