Macro cmd_lib::run_fun

macro_rules! run_fun {
    ($($cur:tt)*) => { ... };
}

run_fun! --> FunResult

#[macro_use]
use cmd_lib::run_fun;
let version = run_fun!(rustc --version).unwrap();
eprintln!("Your rust version is {}", version);

// with pipes
let files = run_fun!(du -ah . | sort -hr | head -n 10).unwrap();
eprintln!("files: {}", files);