clap_static_test

Cargo.toml

[package]
name = "clap_static_test"
version = "0.1.0"
authors = ["jaypei <jaypei97159@gmail.com>"]

[dependencies]
clap = {version = "2", features = ["yaml"]}
lazy_static = "0.2.1"

src_global.yml

name: test
version: "0.1.0"
about: clap test
author: Jaypei <jaypei97159@gmail.com>

settings:
  - ArgRequiredElseHelp

subcommands:
  - a:
      subcommands:
        - b:
            about: ab
            args:
              - port:
                  help: port number
                  index: 1

src_main.rs

#[macro_use]
extern crate clap;
#[macro_use]
extern crate lazy_static;

use clap::{App,ArgMatches};


pub struct MyArgs<'a> {
    args: ArgMatches<'a>
}

lazy_static! {
    pub static ref MATCHES: MyArgs<'static> = {
        let yaml = load_yaml!("global.yml");
        MyArgs {
            args: App::from_yaml(yaml).get_matches()
        }
    };
}


fn main() {
    let ref matches = MATCHES.args;
    println!("{}", matches.subcommand_name().unwrap());
}