Rakefile to install a gem and copy it to my Documents dir so I can play with it - run as sudo like: sudo rake G=bundler,nokogiri,rails --trace

Rakefile to install a gem and copy it to my Documents dir so I can play with it

require 'rubygems'
require 'rake'
require 'fileutils'

desc "installs and copies gems to Documents for src code inspection - just type sudo rake G=gem1,gem2,gem3..."
task :default => :gem_cp
task :gem_cp do 
  class Doppleganger 
    def initialize(gems)
      @gems = gems
      @source_path = "#{Gem.path[1]}/gems/"
      @username = `who`.split(" ")[0]
      @destination_path = "/home/#{@username}/Documents/gems/"
    end
    
    def gem_with_version(line) 
      match = line.match(/[A-Za-z_-]+[-]+[\d.]{2,}/) 
      match[0] if match
    end
    
    def install_with_dependencies(gem)
      puts output = `gem install #{gem}`
      output.split("Successfully").map {|s| gem_with_version(s)}.compact
    end

    def copy_for_inspection(gem)
      source = @source_path + gem + '/'
      destination = @destination_path + gem + '/'
      cp_r source, @destination_path, :verbose => true
      chown_R @username, @username, destination, :verbose => true  
    end
    
    def dopplepopolis # you know... Sealab!?    
      @gems.split(',').each do |gem|
        install_with_dependencies(gem).map {|g| copy_for_inspection(g)}
      end
    end
  end
  
  gems = ENV['G'] || ENV['GEMS']
  raise ArgumentError, "No gems list. Add GEMS=gem1,gem2,gem3..." unless gems 
  Doppleganger.new(gems).dopplepopolis
end