Rust command line argument parse clap31.01.23

use std::path::PathBuf;

use clap::{arg, command, value_parser, ArgAction, Command};

fn main() {
    let matches = command!() // requires `cargo` feature
        .arg(arg!([name] "Optional name to operate on"))
        .arg(
            arg!(
                -c --config <FILE> "Sets a custom config file"
            )
            // We don't have syntax yet for optional options, so manually calling `required`
            .required(false)
            .value_parser(value_parser!(PathBuf)),
        )
        .arg(arg!(
            -d --debug ... "Turn debugging information on"
        ))
        .subcommand(
            Command::new("test")
                .about("does testing things")
                .arg(arg!(-l --list "lists test values").action(ArgAction::SetTrue)),
        )
        .get_matches();

// You can check the value provided by positional arguments, or option arguments
    if let Some(name) = matches.get_one::<String>("name") {
        println!("Value for name: {}", name);
    }

if let Some(config_path) = matches.get_one::<PathBuf>("config") {
        println!("Value for config: {}", config_path.display());
    }

// You can see how many times a particular flag or argument occurred
    // Note, only flags can have multiple occurrences
    match matches
        .get_one::<u8>("debug")
        .expect("Count's are defaulted")
    {
        0 => println!("Debug mode is off"),
        1 => println!("Debug mode is kind of on"),
        2 => println!("Debug mode is on"),
        _ => println!("Don't be crazy"),
    }

// You can check for the existence of subcommands, and if found use their
    // matches just as you would the top level cmd
    if let Some(matches) = matches.subcommand_matches("test") {
        // "$ myapp test" was run
        if matches.get_flag("list") {
            // "$ myapp test -l" was run
            println!("Printing testing lists...");
        } else {
            println!("Not printing testing lists...");
        }
    }

// Continued program logic goes here...
}

https://docs.rs/clap/latest/clap/_tutorial/

Anonymous

extern crate ct_nox;
use ct_nox::ct_nox::{get_hello};
use std::path::PathBuf;
use clap::{arg, command, value_parser, ArgAction, Command, Arg };

fn main() {
    // https://docs.rs/clap/latest/clap/_tutorial/index.html                                                                                                                                                                               
    let matches = command!()
    .arg(Arg::new("password").short('p').long("password"))
    .get_matches();

if let Some(password) = matches.get_one::<String>("password") {
       println!("password: {}", password);
     }

//let x = get_hello();                                                                                                                                                                                                                 
    //println!("{:?}",x);                                                                                                                                                                                                                  
}

31.01.23

Anonymous

Rust command line argument parse clap31.01.23

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