gistfile1.rb

require 'rubygems'
require 'httparty'

class GoogleClosure
  include HTTParty

  base_uri 'closure-compiler.appspot.com'

  def self.compile(path)
    contents = File.read(path)

    params = {
      :js_code => contents,
      :compilation_level => 'SIMPLE_OPTIMIZATIONS',
      :output_format => 'text',
      :output_info => 'compiled_code',
    }

    post('/compile',
      :body => params,
      :headers => {
        'Content-type' => 'application/x-www-form-urlencoded'
      }
    )
  end
end

File.open('public/javascripts/bookmarklet.min.js', 'w') do |f|
  f.write GoogleClosure.compile('public/javascripts/bookmarklet.js')
end