Command line app to backup all your github repos. You can then use the local path just like a remote one when github goes down.

github-backup.rb

#!/usr/bin/env ruby
gem 'mbleigh-ruby-github'
require "ruby-github"

unless username = ARGV.first and username =~ /[a-zA-Z0-9]+/
  puts "Usage: #{$0} <github_username>"
  exit(1)
end

BASE_PATH=File.expand_path("./repos")

Dir.mkdir(BASE_PATH) unless File.directory? BASE_PATH

def git(*args)
  system("git", *args)
  raise "Command git #{args.join(" ")} Failed" unless $?.success?
end

user_path = "#{BASE_PATH}/#{username}"
Dir.mkdir(user_path) unless File.directory? user_path
Dir.chdir(user_path)

GitHub::API.user(username).repositories.each do |repo|
  local_repos = File.expand_path("#{user_path}/#{repo.name}.git")
  remote_repos = "git://github.com/#{repo.user}/#{repo.name}.git"

  ENV["GIT_DIR"] = "#{repo.name}.git"
  git "clone", "-q", "--bare", remote_repos unless File.directory? local_repos
  git "fetch", "-q", remote_repos, "HEAD"
end