Gist auto fetcher and requirer

autogist.rb

require 'pathname'
require 'open-uri'

def require_gist(number, file, options = {})
  AutoGist::Gist.new(number, file, options).setup
end


# TODO Add logs
# TODO Reload gists (especially without ref)
module AutoGist
  HUB_URL = 'https://gist.github.com/raw'
  
  def self.path
    @@gists_path ||= begin
      path = Pathname(File.expand_path(Dir.pwd)) + '.autogist'
      path.mkpath
      path
    end
  end
  
  class Gist
    
    
    attr_accessor :number, :file, :options, :ref
    def initialize(number, file, options = {})
      @number, @file, @options = number, file, options
      @ref = options[:ref] || 'last'
      AutoGist.path
    end
    
    def setup
      path = AutoGist.path + "#{number}_#{ref}_#{file}"
      unless path.exist?
        puts "AutoGist: #{raw_url} -> #{path}"
        path.open('w') do |f| 
          f.flock File::LOCK_EX
          f.puts open(raw_url).read 
        end
      end
      require path.to_s
    end
    
    def raw_url
      "#{HUB_URL}/#{number}#{ref == 'last' ? '' : '/' + ref}/#{file}"
    end
  end
end

example.rb

require 'autogist'

require_gist 603225, "em_chain.rb" 
# https://gist.github.com/raw/603225/em_chain.rb -> /Local/path/.autogist/603225_last_em_chain.rb

chain = EMChain.new

puts 'yeee'