code: func importSecretFile(args []string) ([]secretPair, error) {
  	switch len(args) {
  	case 0:
  		return readStdin()
  	case 1:
  		return readFile(args[0])
  	default:
  		return nil, errors.New("Too many arguments were provided")
  	}
  }
docs: // importSecretFile returns a list of secret pairs either reading a file
  // provided or from the standard input. It returns an error if there is a
  // problem parsing secrets or stdin fails to read.