code: def upsert(version, stack, ini, dryrun, yaml, no_poll, work_directory):
      
      ini_data = read_config_info(ini)
      if 'environment' not in ini_data:
          print('[environment] section is required in the INI file')
          sys.exit(1)
  
      if version:
          ini_data['codeVersion'] = version
      else:
          ini_data['codeVersion'] = str(int(time.time()))
  
      if 'region' not in ini_data['environment']:
          ini_data['environment']['region'] = find_myself()
  
      ini_data['yaml'] = bool(yaml)
      ini_data['no_poll'] = bool(no_poll)
      ini_data['dryrun'] = bool(dryrun)
  
      if stack:
          ini_data['environment']['stack_name'] = stack
  
      if work_directory:
          try:
              os.chdir(work_directory)
          except Exception as wtf:
              logging.error(wtf)
              sys.exit(2)
  
      print(json.dumps(ini_data, indent=2))
      start_upsert(ini_data)
docs: The main reason we have arrived here. This is the entry-point for the
      utility to create/update a CloudFormation stack.