use std::collections::HashMap;
use std::fmt::Display;
use std::fmt::Formatter;
use std::io;

use failure::Fail;

pub mod error;
pub mod backup;
pub mod restore;
pub mod source;

pub mod repository;

pub struct Version(String);
struct RepositoryRelativePath {}

struct Index<'a> {
    versions: HashMap<&'a RepositoryRelativePath, &'a Version>,
}