anchor.diff:  && apt-get autoremove -y \
   && rm -rf /var/lib/apt/lists/*
   
  -
   # set user ros and sudo
   RUN adduser --gecos "ROS User" --home /home/ros --disabled-password ros
   RUN usermod -a -G dialout ros
  
positive.code: RUN echo "source "/opt/ros/$ROS_DISTRO/setup.bash"" >> /home/ros/.bashrc
  
  # link to root user home directory
  RUN mkdir -p /home/ros/.gazebo/ && sudo ln -s /data/gazebo/gazebo_models /home/ros/.gazebo/models
  
  RUN sudo chmod -R a+rwx /data/gazebo/gazebo_models
  
  CMD ["bash"]
  ENTRYPOINT ["/ros_entrypoint.sh"]
  
negative.code: RUN apt-get install -y qt5-default qtcreator
  
  # download gazebo models
  RUN mkdir -p /ros_data/gazebo && cd /ros_data/gazebo/
  RUN hg clone https://bitbucket.org/osrf/gazebo_models
  
  # chmod
  RUN ls -al /ros_data/gazebo
  RUN chmod -R 777 /ros_data/gazebo/gazebo_models
  
  # install ros related components
  RUN apt-get install -y ros-indigo-moveit-full \
  