assets.rake

namespace :assets do

  desc "Check that all assets have valid encoding"
  task  :check => :environment do

    paths = ["public/javascripts", "public/stylesheets"]
    extensions = ["js", "coffee", "css", "scss"]

    paths.each do |path|
      dir_path = Rails.root + path

      if File.exists?(dir_path)
        dir_files = File.join(dir_path, "**")

        Dir.glob(dir_files + "/**.{#{extensions.join(',')}}").each do |file|

            # make sure we're not trying to process a directory
            unless File.directory?(file)
              # read the file and check its encoding
              data = File.read(file)
              unless data.valid_encoding?
                puts "Invalid encoding: #{ file }"
              end
            end
        end # end Dir.glob
      end #end File.exists
    end # end paths.each
  end
end