The default value for boolean is not showing in the cli

[MohamadTahir]

Hello, the default value for boolean flags is not show in the cli when doing --help, for exmaple I have the following struct

type CLI struct {
	Test bool `default:true`
}

main function

func Run() {
	cli := &CLI{}

	ctx := kong.Parse(
		cli,
		kong.Description("A Test CLI Tool."),
		kong.Vars{
			"version": "0.0.1",
		},
	)
	ctx.Run()
}

when checking the help output in the cli

go run main.go --help

Usage: main [flags]

A Test CLI Tool.

Flags:
  -h, --help    Show context-sensitive help.
      --test

[alecthomas]

That's kind of deliberate, as when boolean flags are used without explicitly setting a value (eg. --test) they will always set the value to true. That is, they should almost always be false by default, and having the default value in the help is largely redundant.

If you want the value to be set to either true or false I would recommend using negatable:"" and adding something to the description defining the default state.