fn main() { let cmd = clap::Command::new("stdio-fixture") .version("1.0") .long_version("1.0 - a2132c") .arg_required_else_help(true) .subcommand(clap::Command::new("more")) .arg( clap::Arg::new("verbose") .long("verbose") .help("log") .long_help("more log"), ); cmd.get_matches(); }