anchor.diff:  ADD roles/ /ansible/roles
   ADD provision.yml /ansible/provision.yml
   ADD postgresql_provision.yml /ansible/postgresql_provision.yml
  +
   RUN ansible-playbook /ansible/postgresql_provision.yml && \
       ansible-playbook /ansible/provision.yml \
       --extra-vars galaxy_venv_dir=$GALAXY_VIRTUAL_ENV \
  
positive.code: ENV GALAXY_RELEASE=${GALAXY_RELEASE:-dev} \
  GALAXY_REPO=${GALAXY_REPO:-https://github.com/galaxyproject/galaxy} \
  GALAXY_ROOT=/galaxy-central \
  GALAXY_CONFIG_DIR=/etc/galaxy
  
  ENV GALAXY_CONFIG_FILE=$GALAXY_CONFIG_DIR/galaxy.ini \
  GALAXY_CONFIG_JOB_CONFIG_FILE=$GALAXY_CONFIG_DIR/job_conf.xml \
  
negative.code:     apt-add-repository -y ppa:ansible/ansible && \
      apt-add-repository -y ppa:galaxyproject/nginx && \
      apt-get update -qq && apt-get upgrade -y && \
      apt-get install --no-install-recommends -y postgresql-9.3 sudo python-virtualenv \
      nginx-extras=1.4.6-1ubuntu3.4ppa1 nginx-common=1.4.6-1ubuntu3.4ppa1 supervisor docker-ce slurm-llnl slurm-llnl-torque \
      slurm-drmaa-dev proftpd proftpd-mod-pgsql libyaml-dev nodejs-legacy npm ansible \
      nano vim curl python-crypto python-pip python-psutil condor python-ldap \
      gridengine-common gridengine-drmaa1.0 rabbitmq-server && \
      pip install --upgrade pip && \
      pip install ephemeris && \
  