encoding.rake

# encoding: utf-8 
namespace :encoding do
  task :update_files do
    Dir.glob("{app,config,spec,test,lib,db,features}/**/*.{rb,rake}").each do |f|
      add_encoding(f)
    end
  end
  
  def add_encoding(file_name, encoding = 'utf-8')
    if File.exist?(file_name)
      old_content = File.read(file_name)

      # Ignore the Schema version line because it changes with each migration
      encoding_regexp = Regexp.new(/^# encoding: (.*)$/)
      match_data = old_content.match(encoding_regexp)
      old_encoding = match_data ? match_data.captures[0].strip : ""

      puts "#{file_name}: #{old_encoding}"
      unless old_encoding == encoding
        puts " => Changing encoding '#{old_encoding}' to '#{encoding}'"
        old_content.sub!(encoding_regexp, '')
        new_content = "# encoding: #{encoding} \n#{old_content}"
        File.open(file_name, "wb") { |f| f.puts new_content }
      end
    end
  end
end