Use require relative instead of all that __FILE__ magic

base.rb

# -*- encoding : utf-8 -*-

SKETCH_PATH ||= ARGV.shift 
SKETCH_ROOT ||= File.dirname(SKETCH_PATH) 

require_relative '../../jruby_art'
require_relative '../../jruby_art/app'

module Processing

  # For use with "bare" sketches that don't want to define a class or methods
  SKETCH_TEMPLATE = <<-EOS
    class Sketch < Processing::App
      <% if has_methods %>
      <%= source %>
      <% else %>
      def setup
        size(DEFAULT_WIDTH, DEFAULT_HEIGHT, JAVA2D)
        <%= source %>
        no_loop
      end
      <% end %>
    end
  EOS

  # This method is the common entry point to run a sketch, bare or complete.
  def self.load_and_run_sketch
    source = self.read_sketch_source
    has_sketch = !!source.match(/^[^#]*< Processing::App/)
    has_methods = !!source.match(/^[^#]*(def\s+setup|def\s+draw)/)

    if has_sketch
      load File.join(SKETCH_ROOT, SKETCH_PATH)      
      Processing::App.sketch_class.new if !$app 
    else
      require 'erb'
      code = ERB.new(SKETCH_TEMPLATE).result(binding)
      Object.class_eval code, SKETCH_PATH, -1
      Processing::App.sketch_class.new
    end
  end


  # Read in the sketch source code. Needs to work both online and offline.
  def self.read_sketch_source
    File.read(SKETCH_PATH)
  end

end