Combination of required and enum cause other sub-command failure

[juliaogris]

For given sample:

package main

import (
	"fmt"

	"github.com/alecthomas/kong"
)

var CLI struct {
	One struct {
		OneArg string `arg:"" required:""`
	} `cmd: ""`
	Two struct {
		TwoArg string `arg:"" enum:"a,b,c" required:""`
	} `cmd: ""`
}

func main() {
	ctx := kong.Parse(&CLI)
	switch cmd := ctx.Command(); cmd {
	case "one <one-arg>", "two <two-arg>":
		fmt.Println("command:", cmd)
	default:
		panic(ctx.Command())
	}
}

I expect the following behaviour:

> go run main.go one X
command: one <one-arg>
> go run main.go two a
command: two <two-arg>

However, I get:

> go run main.go one X          
main: error: <two-arg> must be one of "a","b","c" but got ""
exit status 1
> go run main.go two a
command: two <two-arg>

When I remove the enum tag or replace required with default:"a" in command two, command one behaves as expected.

[alecthomas]

Are you on master? I fixed some bugs with this recently.

[juliaogris]

I am now on master and I still get the same error for go.mod:

module github.com/juliaogris/kongenum

go 1.13

require github.com/alecthomas/kong v0.2.2-0.20191112213115-d2286db01b8f

[alecthomas]

Okay that should be fixed now. Let me know if it's still failing for your use case.

[juliaogris]

Confirmed! Thank you very much - great library.