Cobra 中的命名位置参数

Question

我有以下 Cobra 子命令：

package stripeCommands

import (
    "fmt"
    "cmd/cliConstants"
    "github.com/spf13/cobra"
    "log"
)

var (
    deleteCustomerCommand = &cobra.Command{
        Use:        "delete",
        Short:      "Delete Stripe customer(s) by ids.",
        Args:       cobra.MinimumNArgs(1),
        ArgAliases: []string{"stripe_customer_id"},
        PreRun: func(cmd *cobra.Command, args []string) {

        },
        Run: func(cmd *cobra.Command, args []string) {
            log.Printf("IDs: %v", args)
        },
    }
)

func init() {
    flags := deleteCustomerCommand.Flags()

    // -k|--stripe-api-key|STRIPE_API_KEY
    flags.StringP(cliConstants.CLIFlagStripeAPIKey, "k", "",
        fmt.Sprintf("The Stripe API key. [env: %s]", cliConstants.EnvVarStripeAPIKey))
}

这个想法是通过

./my-app stripe customers delete -k $STRIPE_API_KEY $CUSTOMER_ID_1 $CUSTOMER_ID_2

来调用它。

虽然

cobra.MinimumNArgs(1)

确实确保我得到至少一个位置参数，但我找不到一种方法来使其显示在帮助文档中：

Error: requires at least 1 arg(s), only received 0
Usage:
  my-app stripe customers delete [flags]

Flags:
  -h, --help                    help for delete
  -k, --stripe-api-key string   The Stripe API key. [env: stripe_api_key]

2021/09/13 12:00:39 Failed to execute command: requires at least 1 arg(s), only received 0

有没有办法告诉 Cobra 在帮助中显示位置参数，例如：

Usage:
  my-app stripe customers delete [flags] customer_id [...customer_id]

现在，帮助文档在向用户显示他们应该作为位置参数传递的内容方面并不是很有帮助。

Answer 1

将命令的

Use

字段设置为：

    deleteCustomerCommand = &cobra.Command{
        Use: "delete [flags] customer_id [...customer_id]",
        ...

如何使用它的完整细节可以在

cmd.UseLine()

的代码中找到：
https://github.com/spf13/cobra/blob/v1.2.1/command.go#L1245