Capistrano fast assets precompile

gistfile1.rb

  namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      if capture("diff -r #{latest_release}/app/assets/ #{current_release}/app/assets/ | wc -l").to_i > 0
        run %Q{cd #{current_release} && #{rake} RAILS_ENV=#{rails_env} #{asset_env} assets:precompile}
      else
        logger.info "Skipping asset pre-compilation because there were no asset changes"
      end
    end
  end