docs: def run(command, exit, silent, check):
      """
      Runs given command on all repos and checks status
  
          $ maintain repo run -- git checkout master
      """
  
      status = 0
  
      for (repo, path) in gather_repositories():
          if check and not check_repo(repo, path):
              status = 1
  
              if exit:
                  break
  
              continue
  
          with chdir(path):
              result = subprocess.run(command, shell=True, capture_output=silent)
              if result.returncode != 0:
                  status = result.returncode
  
                  print('Command failed: {}'.format(repo))
  
                  if exit:
                      break
  
      sys.exit(status)