// Note: this requires the `cargo` feature use clap::{arg, command, Command}; fn main() { let matches = command!() .propagate_version(true) .subcommand_required(true) .arg_required_else_help(true) .subcommand( Command::new("add") .about("Adds files to myapp") .arg(arg!([NAME])), ) .get_matches(); match matches.subcommand() { Some(("add", sub_matches)) => println!( "'myapp add' was used, name is: {:?}", sub_matches.value_of("NAME") ), _ => unreachable!("Exhausted list of subcommands and subcommand_required prevents `None`"), } }