Deletes js and css cache files: Taken from maintainable software

tmp.rake

namespace :tmp do
  namespace :assets do 
    desc "Clears javascripts/cache and stylesheets/cache"
    task :clear => :environment do      
      FileUtils.rm(Dir['public/javascripts/cache/[^.]*'])
      FileUtils.rm(Dir['public/stylesheets/cache/[^.]*'])
    end
  end
end