Nested Subcommands with arguments do not work

[matthiasbeyer]

Please complete the following tasks

• I have searched the discussions
• I have searched the open and rejected issues

Rust Version

1.90

Clap Version

4.5.48

Minimal reproducible code

use clap::Parser;
use clap::Subcommand;

#[derive(Parser)]
struct App {
    #[clap(subcommand)]
    command: Command,
}

#[derive(Clone, Debug, Subcommand)]
enum Command {
    Inner {
        #[clap(long, short)]
        foo: i32,
        
        #[clap(subcommand)]
        inner: Config,
    }
}

#[derive(Clone, Debug, Subcommand)]
enum Config {
    #[clap(subcommand)]
    Show,
    #[clap(subcommand)]
    Edit,
}

fn main() {
    App::parse_from(&["app", "inner", "--foo", "12", "show"]);
}

playground

Steps to reproduce the bug with the above code

Run playground

Actual Behaviour

Prints help text, which indicates the exact same that was passed

Expected Behaviour

Parses CLI correctly

Additional Context

No response

Debug Output

No response

[epage]

Note that the presence of --foo 12 doesn't have anything to do with this.

Is there a reason you are setting #[clap(subcommand)] on Show and Edit. To make them subcommands, its not needed, as shown by your Command::Inner variant.

#[clap(subcommand)] on an enum variant is meant for

enum Command {
    #[clap(subcommand)]
    Inner(Config)
}

Unsure why we allow #[clap(subcommand)] on unit variants.

[matthiasbeyer]

Unsure why we allow #[clap(subcommand)] on unit variants.

Probably this is the underlying issue then... removing that in my code also solved that problem for me. 🎉