anchor.diff:  # automatically run intro script giving information on startup
   RUN echo 'source /intro.sh' >> /root/.bashrc
   
  +# provision virtual machine with SUPERSMART environment
  +RUN puppet apply /default.pp 
  +
   # run unit tests
   RUN cd $SUPERSMART_HOME && perl Makefile.PL && make test
  
positive.code: # 'default.pp' manifest.
  
  # specify version of ubuntu
  # FROM ubuntu:14.04
  FROM naturalis/supersmart
  
  # add scripts
  ADD default.pp /
  
negative.code: 
  # install necessary packages
  RUN apt-get -y update && apt-get install -y puppet nano
  
  # set environment variables required by SUPERSMART
  ENV PERL5LIB "$PERL5LIB:/supersmart/lib/"
  