anchor.diff:  # install bundler and other gems
   RUN gem install bundler aruba cucumber
   
  +# get terraform
  +RUN wget https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_amd64.zip
  +
  +# get custom providers
  +RUN wget https://github.com/Samsung-AG/terraform-provider-execute/releases/download/${TERRAFORM_EXECUTE_VERSION}/terraform-provider-execute_linux_amd64.tar.gz
  +RUN wget https://github.com/Samsung-AG/terraform-provider-coreosbox/releases/download/${TERRAFORM_COREOSBOX_VERSION}/terraform-provider-coreosbox_linux_amd64.tar.gz
  +
  +# decompress everything
  +RUN unzip -o terraform_${TERRAFORM_VERSION}_linux_amd64.zip -d /usr/local/bin \
  +    && tar -xvf terraform-provider-coreosbox_linux_amd64.tar.gz \
  +    && tar -xvf terraform-provider-execute_linux_amd64.tar.gz
  +
  +# install all binaries
  +RUN cp terraform* /usr/local/bin
  +
  +# cleanup
  +RUN rm terraform*
  +
   # install kubectl
   RUN wget https://github.com/GoogleCloudPlatform/kubernetes/releases/download/${KUBERNETES_VERSION}/kubernetes.tar.gz
   RUN tar -xvf kubernetes.tar.gz
   RUN cp kubernetes/platforms/linux/amd64/kubectl /usr/bin && rm kubernetes.tar.gz
  -
  -# install fleetctl
  -RUN wget https://github.com/coreos/fleet/releases/download/${FLEET_VERSION}/fleet-${FLEET_VERSION}-linux-amd64.tar.gz
  -RUN tar -xvf fleet-${FLEET_VERSION}-linux-amd64.tar.gz
  -RUN cp fleet-${FLEET_VERSION}-linux-amd64/fleetctl /usr/bin && rm fleet-${FLEET_VERSION}-linux-amd64.tar.gz
  -
   
   # install vault cli
   RUN wget https://dl.bintray.com/mitchellh/vault/vault_${VAULT_VERSION}_linux_amd64.zip \
  
positive.code: RUN apt-get update \
      && apt-get install -y --force-yes \
        curl \
        jq \
        ruby \
        ruby-dev \
  
negative.code: RUN chmod 400 /root/.ssh/id_rsa
  
  # versions
  ENV TERRAFORM_VERSION 0.6.6
  ENV TERRAFORM_EXECUTE_VERSION v0.0.2
  ENV TERRAFORM_COREOSBOX_VERSION v0.0.1
  ENV KUBERNETES_VERSION v1.1.1
  ENV VAULT_VERSION 0.3.1
  
  # install jenkins plugins
  RUN /usr/local/bin/plugins.sh /usr/share/jenkins/plugins.txt
  
  # skip installing gem documentation
  RUN echo 'gem: --no-rdoc --no-ri' >> /.gemrc
  