PackR is a Ruby port of Dean Edwards’ MIT-licensed JavaScript compressor, Packer: # Packer version 3.0 (final) - copyright 2004-2007, Dean Edwards # http://www.opensource.org/licenses/mit-license http://dean.edwards.name/packer/ This version is based on Packer 3.0. You may find that the results it produces are not strictly identical to those of the JavaScript version, but the difference is just a