anchor.diff:  # Clean up APT when done
   RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
   
  +
  
positive.code: # Dockerfile for Ruby 2.1.1 (Current stable)
  #
  # VERSION 1.0
  
  
negative.code: 
  MAINTAINER Luca G. Soave <luca.soave@gmail.com>
  
  # Change REFRESHED_AT date 
  # to force local image update
  #
  ENV REFRESHED_AT 2014-15-03
  
  # Update apt, download, compile and install Ruby and accessory lib
  ADD http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.1.tar.gz / 
  RUN apt-get -qq update && apt-get install -yqq tar git && tar -xzf ruby-2.1.1.tar.gz && \
      apt-get install -yqq build-essential zlib1g-dev libssl-dev libreadline6-dev libyaml-dev && \
      (cd ruby-2.1.1/ && ./configure --disable-install-doc && make && make install) && \
      rm -rf ruby-2.1.1/ && rm -f /ruby-2.1.1.tar.gz
  
  # Install bundler
  RUN gem install bundler --no-rdoc --no-ri
  