func CheckArgs()

in commands/util.go [895:923]
27 lines of code
4 McCabe index (conditional complexity)

func CheckArgs(args []string, minimumArgNumber int, maximumArgNumber int, commandName string,
	requiredArgMsg string) *whisk.WskError {
	exactlyOrAtLeast := wski18n.T("exactly")
	exactlyOrNoMoreThan := wski18n.T("exactly")

	if minimumArgNumber != maximumArgNumber {
		exactlyOrAtLeast = wski18n.T("at least")
		exactlyOrNoMoreThan = wski18n.T("no more than")
	}

	if len(args) < minimumArgNumber {
		whisk.Debug(whisk.DbgError, fmt.Sprintf("%s command must have %s %d argument(s)\n", commandName,
			exactlyOrAtLeast, minimumArgNumber))
		errMsg := wski18n.T("Invalid argument(s). {{.required}}", map[string]interface{}{"required": requiredArgMsg})
		whiskErr := whisk.MakeWskError(errors.New(errMsg), whisk.EXIT_CODE_ERR_GENERAL,
			whisk.DISPLAY_MSG, whisk.DISPLAY_USAGE)
		return whiskErr
	} else if len(args) > maximumArgNumber {
		whisk.Debug(whisk.DbgError, fmt.Sprintf("%s command must have %s %d argument(s)\n", commandName,
			exactlyOrNoMoreThan, maximumArgNumber))
		errMsg := wski18n.T("Invalid argument(s): {{.args}}. {{.required}}",
			map[string]interface{}{"args": strings.Join(args[maximumArgNumber:], ", "), "required": requiredArgMsg})
		whiskErr := whisk.MakeWskError(errors.New(errMsg), whisk.EXIT_CODE_ERR_GENERAL,
			whisk.DISPLAY_MSG, whisk.DISPLAY_USAGE)
		return whiskErr
	} else {
		return nil
	}
}