->(){

  # enable tail-call optimization
  RubyVM::InstructionSequence.compile_option = {
    tailcall_optimization: true,
    trace_instruction: false
  }

  mintty2gterm = Module.new{

    # port of rails underscore method, but dasherizing instead
    refine String do
      def dasherize
        self.gsub(/::/, '/').
          gsub(/([A-Z]+)([A-Z][a-z])/,'\1-\2').
          gsub(/([a-z\d])([A-Z])/,'\1-\2').
          tr("_", "-").
          downcase
      end
    end

    # convert dec. color to hex. color
    def to_color_hex
      ->(color){
        str = color.to_i.to_s 16
        str.length < 2 ? "0#{str}" : str
      }
    end

    # get user input
    def user_input
      ->(max_len, index=-1){
        return index if index < max_len && index >= 0
        user_input.call max_len, ARGF.readline.chomp.to_i
      }
    end

  }

  # use monkey patches and include functions
  using mintty2gterm
  include mintty2gterm

  # get profiles and a base dconf dir
  dconfdir="/org/gnome/terminal/legacy/profiles:"
  profiles=(`dconf list #{dconfdir}/`.split "\n")[1...-1]

  # no profile found error
  if profiles.empty?
    warn "No profiles found."
    exit -1
  end

  # profile Selection
  puts "Select profile:  (default: 0)"
  profiles.each_with_index do |profile, i|
    puts "  (#{i}) => #{profile}"
  end
  print "=> "
  profile = profiles[user_input.call profiles.length]

  # build p
  profile_path = "#{dconfdir}/#{profile}"

  # keys I want to get
  sp_colors = ['Foreground', 'Background', 'Cursor']
  term_colors = ['Black', 'Red', 'Green', 'Yellow', 'Blue', 'Magenta', 'Cyan', 'White']

  # join every
  colors = Array.new.
    concat(sp_colors.map{|col| "#{col}Colour" }).
    concat(term_colors.map{|col| [col, "Bold#{col}"] }.flatten)

  # open minty config and parse colors
  File.open('.minttyrc', 'r'){|file|
    file.each_line{|line|
      key, value = line.split('=')
      next unless colors.include? key
      col = (value.split ',').map{|cmp| to_color_hex.call cmp }.join ''
      puts "#{key.dasherize}: #{col}"
    }
  }

}.call()