anchor.diff:  
   VOLUME /workspace
   WORKDIR /workspace
  +ENTRYPOINT ["/entrypoint.sh"]
  
positive.code: RUN apt-get update
  RUN apt-get install -y wget curl unzip
  
  COPY tools /opt/sdk-tools
  RUN chmod -R a+x /opt/sdk-tools
  ENV PATH ${PATH}:/opt/sdk-tools
  
  # install Android SDK dependencies
  #RUN apt-get install -y openjdk-7-jre-headless lib32z1 lib32ncurses5 lib32bz2-1.0 g++-multilib unzip
  #RUN apt-get install -y expect
  #RUN apt-get install -y --no-install-recommends maven
      
  # Main Android SDK
  #RUN wget -qO- "http://dl.google.com/android/android-sdk_r24.4.1-linux.tgz" | tar -zxv -C /opt/
  # RUN echo y | /opt/android-sdk-linux/tools/android update sdk --all --filter platform-tools,build-tools-20.0.0 --no-ui --force --proxy-host 192.168.1.7 --proxy-port 7070
  
negative.code: RUN apt-get install -y openssh-server
  #RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
  #RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
  RUN echo 'root:123456' | chpasswd
  RUN sed -ri 's/^PermitRootLogin\s+.*/PermitRootLogin yes/' /etc/ssh/sshd_config
  RUN sed -ri 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config
  
  # copy enterpoint script
  CP entrypoint.sh /entrypoint.sh
  RUN chmod +x /entrypoint.sh
  
  EXPOSE 22
  
  