fn add_cargo_handler(
    button: &gtk::Button,
    project_path_str: String,
    args: Vec<&str>,
    build_term: Rc<RefCell<gtk::VteTerminal>>,
    current_pid: Rc<Cell<i32>>)
{
    button.connect(gtk::signals::Clicked::new(&mut move || {
        match build_term.borrow_mut().fork_command(project_path_str.as_slice(), args.as_slice()) {
            Ok(pid) => current_pid.set(pid),
            Err(s) => println!("{}", s)
        }
    }));
}

fn create_builder(project_path_str: &str) -> gtk::Box {
    let run_button = gtk::Button::new_with_label("Run").unwrap();
    let build_button = gtk::Button::new_with_label("Build").unwrap();
    let test_button = gtk::Button::new_with_label("Test").unwrap();
    let clean_button = gtk::Button::new_with_label("Clean").unwrap();

    let mut build_buttons = gtk::Box::new(gtk::Orientation::Horizontal, 0).unwrap();
    build_buttons.add(&run_button);
    build_buttons.add(&build_button);
    build_buttons.add(&test_button);
    build_buttons.add(&clean_button);

    let build_term = gtk::VteTerminal::new().unwrap();
    let mut builder = gtk::Box::new(gtk::Orientation::Vertical, 0).unwrap();
    builder.add(&build_buttons);
    builder.pack_start(&build_term, true, true, 0);

    let build_term_rc = Rc::new(RefCell::new(build_term));
    let current_pid_rc = Rc::new(Cell::new(-1));

    add_cargo_handler(&run_button, String::from_str(project_path_str),
        vec!["cargo", "run"], build_term_rc.clone(), current_pid_rc.clone());
    add_cargo_handler(&build_button, String::from_str(project_path_str),
        vec!["cargo", "build", "--release"], build_term_rc.clone(), current_pid_rc.clone());
    add_cargo_handler(&test_button, String::from_str(project_path_str),
        vec!["cargo", "test"], build_term_rc.clone(), current_pid_rc.clone());
    add_cargo_handler(&clean_button, String::from_str(project_path_str),
        vec!["cargo", "clean"], build_term_rc.clone(), current_pid_rc.clone());

    builder.show_all();
    builder
}