gistfile1.rb

namespace :release do
 
  task :js => :environment do
    puts "Compiling coffeescript to javascript..."
    [...]
    File.open("#{release_dir}/example.js", 'w') do |file|
      file.write CoffeeScript.compile(File.read("#{dev_dir}/example.coffee"))
    end
    puts "Coffeescript compiled"
    puts "Closure Compiler: minifying"
    raw = File.read("#{release_dir}/example.js")
    File.open("#{release_dir}/example.js", 'w') do |f|
      output = Closure::Compiler.new.compile(raw)
      f.write "/**\n  Copyright 2011 Alessandro Dal Grande\n\n  Example #{I18n.l Time.now}\n*/"
      f.write output
    end
    puts "Closure Compiler: success"
  end
 
end

# EDIT: added the closure compiler call, that went lost in the first version