# File lib/ramaze/tool/bin.rb, line 32
        def rackup_path # {{{
          return @rackup_path if @rackup_path
          # Use the supplied path if the user supplied -R
          if path_supplied = ARGV.delete("-R")
            @rackup_path = ARGV.delete(@ourargs[@ourargs.index("-R") + 1])
            if @rackup_path and File.file?(@rackup_path)
              return @rackup_path
            else
              $stderr.puts "rackup does not exist at #{@rackup_path} (given with -R)"
            end
          end
          # Check with 'which' on platforms which support it
          unless is_windows?
            @rackup_path = %x{which rackup}.to_s.chomp
            if @rackup_path.size > 0 and File.file?(@rackup_path)
              return @rackup_path
            end
          end
          # check for rackup in RUBYLIB
          libs = ENV["RUBYLIB"].to_s.split(is_windows? ? ";" : ":")
          if rack_lib = libs.detect { |r| r.match %r<(\\|/)rack\1> }
            require "pathname"
            @rackup_path = Pathname.new(rack_lib).parent.join("bin").join("rackup").expand_path
            return @rackup_path if File.file?(@rackup_path)
          end
          begin
            require "rubygems"
            require "rack"
            require "pathname"
            @rackup_path = Pathname.new(Gem.bindir).join("rackup").to_s
            return @rackup_path if File.file?(@rackup_path)
          rescue LoadError
            nil
          end
          @rackup_path = nil
          raise "Cannot find path to rackup, please supply full path to rackup with -R"
        end