Providing helpers by exported shell functions

[olorin37]

As this is a handlebars CLI it would be useful to make possible defining helpers for handlebars via shell function export - which would in fact mean using any program to decorate values.

[olorin37]

rs:

use std::process::Command;
use std::str;

fn main() {
    let prc = Command::new("bash").args( &["-c", "exp_fun"]).output();
    match prc {
        Ok( o ) => println!("OK: A{}Z", str::from_utf8(&o.stdout).unwrap()),
        Err( _ ) => println!("Nope"),
    }
}

usage:

exp_fun() { echo -n "---> $1 <---"; }; export -f exp_fun ; ./r