current_branch.rs

fn current_branch(path: &Path) -> String {
    let head_ref = head_ref(path);
    println!("The ref for HEAD is {}", head_ref);
    let r = regex!(r"refs/heads/(.+)");
    let caps_result = r.captures(head_ref.as_slice());
    let branch: String = match caps_result {
        Some(cap) => { String::from_str(cap.at(1)) },
        None => { panic!("You must be somewhere on refs/heads, and you aren't") }
    };
    branch
}