Reading git config from global and the containing repo in rust

demo.rs

#!/usr/bin/env run-cargo-script
//! This is a regular crate doc comment, but it also contains a partial
//! Cargo manifest.  Note the use of a *fenced* code block, and the
//! `cargo` "language".
//!
//! ```cargo
//! [dependencies]
//! git2 = "0.13"
//! ```

extern crate git2;
use git2::{Repository,Config};
use std::env;


fn main() {
    let repo = match Repository::discover(env::current_dir().unwrap()) {
        Ok(repo) => {
            let cfg = repo.config().unwrap();

            for entry in &cfg.entries(None).unwrap() {
                let entry = entry.unwrap();
                println!("{} => {}", entry.name().unwrap(), entry.value().unwrap());
            }
        },
        Err(e) => panic!("failed to init: {}", e),
    };

    println!("-------");
    let cfg = Config::open_default().unwrap();

    for entry in &cfg.entries(None).unwrap() {
        let entry = entry.unwrap();
        println!("{} => {}", entry.name().unwrap(), entry.value().unwrap());
    }
}