帮助模板中的 Cobra 更改用法行

Question

Usage如果在 Go 中的 cobra 命令上调用帮助函数，我希望能够设置该行以指定需要传递的参数。

这是常规帮助标志输出的内容：

Cancel the order specified by the order id by submitting a cancel order.
Optionally, an account ID may be supplied as well for extra measure.

Usage:
  gbutil orders cancel [flags]

Flags:
  -a, --account_id string   the account id that the order belongs to
  -h, --help                help for cancel

Global Flags:
      --config string   config file (default is $HOME/.gbutil.yaml)

我想要：

Cancel the order specified by the order id by submitting a cancel order.
Optionally, an account ID may be supplied as well for extra measure.

Usage:
  gbutil orders cancel <order_id> [flags]

Flags:
  -a, --account_id string   the account id that the order belongs to
  -h, --help                help for cancel

Global Flags:
      --config string   config file (default is $HOME/.gbutil.yaml)

我曾尝试SetUsageTemplate在init()函数中使用，但随后它删除了部分标志：

orderscancelCmd.SetUsageTemplate(strings.Replace(orderscancelCmd.UsageString(), "gbutil orders cancel [flags]", "gbutil orders cancel <order_id> [flags]", 1))

这导致：

Cancel the order specified by the order id by submitting a cancel order.
Optionally, an account ID may be supplied as well for extra measure.

Usage:
  gbutil orders cancel <order_id> [flags]

Flags:
  -a, --account_id string   the account id that the order belongs to

在那里我丢失了-h标志和有关Global Flags.

如果他们不提供 arg，我可以通过以下方式使其工作：

        if err := cobra.ExactArgs(1)(cmd, args); err != nil {
            fmt.Println(strings.Replace(cmd.UsageString(), "gbutil orders cancel [flags]", "gbutil orders cancel <order_id> [flags]", 1))
            return
        }

但是该-h标志仍然输出错误的用法行。

有没有办法做到这一点？提前致谢！

Answer 1

更改用法名称的外观。您可以在cobra.Command.Use参数中传递它。所以对你来说，它可能看起来像这样：

var cmdCancel = &cobra.Command{
    Use:   "cancel <order_id>",
    Args: cobra.ExactArgs(1), // make sure that only one arg can be passed
    // Your logic here
}