anchor.diff:  
   # ensure java && docker installed
   RUN apt-get update
  +RUN apt-get install -y default-jdk wget curl git
  +#RUN wget -qO- https://get.docker.com/ | sh
   
  -RUN add-apt-repository ppa:webupd8team/java
  -RUN apt-get update
  -RUN apt-get install oracle-java8-installer
  -RUN apt-get install oracle-java8-set-default
  +# add the download script to docker; run download
  +ADD kafka-download.sh /tmp/kafka-download.sh
  +RUN /tmp/kafka-download.sh
   
  -#RUN apt-get install -y unzip openjdk-8-jdk
  -
  -RUN wget curl git docker.io jq
  -
  -# add the download script
  -ADD kafka-download.sh /tmp/kafka-download.sh
  -RUN /tmp/download-kafka.sh
   
   # extract kafka
   RUN tar xf /tmp/kafka_${SCALA_VERSION}-${KAFKA_VERSION}.tgz -C /opt
  
positive.code: FROM ubuntu:trusty
  
  MAINTAINER belbis
  
  # for download and start of kafka later on
  ENV KAFKA_VERSION="0.8.2.1" SCALA_VERSION="2.11"
  
negative.code: ENV KAFKA_HOME=/opt/kafka_${SCALA_VERSION}-${KAFKA_VERSION}
  
  # ensure custom scripts in bin
  ADD kafka-server-start.sh /usr/bin/kafka-server-start.sh
  ADD broker-list.sh /usr/bin/broker-list.sh
  CMD kafka-server-start.sh
  
  # expose port
  EXPOSE 9092
  