Clone all repositories under a user or organization

clone.rb

#!/usr/bin/ruby

require 'open-uri'
require 'json'

user = 'imathis'

repos = open("https://api.github.com/users/#{user}/repos") { |f| 
  JSON.parse(f.readlines.join)
}
FileUtils.mkdir_p('~/workspace/#{user}')

repos.each do |repo|
  `git clone #{repo['ssh_url']} ~/workspace/#{user}/#{repo['name']}`
  puts "cloned #{repo['name']} to ~/workspace/#{user}/#{repo['name']}"
end

This does no error checking and it's not particularly clever, but it uses GitHub's API to clone every repository under a user or organization. I use this to set up my new machines, fetching all my projects down at once.