clap 4.6.1

A simple to use, efficient, and full-featured Command Line Argument Parser
Documentation 
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use clap::Parser;

#[derive(Parser)]
#[command(version, about, long_about = None)]
struct Cli {
    /// Network port to use
    port: u16,
}

fn main() {
    let cli = Cli::parse();

    println!("PORT = {}", cli.port);
}

#[test]
fn verify_cli() {
    use clap::CommandFactory;
    Cli::command().debug_assert();
}