ros2 osrf docker container fails to build

edit

Hello. I'm trying to build a dockerfile that extends the ones osrf is providing at https://hub.docker.com/r/osrf/ros2 and builds our company robot software. This is a first step towards setting up a CI system with jenkins and to simplify building for people that may not have the ros2 toolchain built and installed (maybe we can move to using a container vs. installing locally like we do now).

I've been having some issues with the build and put together two example projects that I can share that build with my local ros2 foxy install but won't build in the container.

The osrf/ros2:nightly is from yesterday.

The dockerfile is inline (because I can't attach it as I have less than 5 points...):

FROM osrf/ros2:nightly

# we want to be able to source
SHELL ["/bin/bash", "-c"]

# Install git
RUN apt-get update && \
    apt-get install -y git

# clone the test repos
RUN cd /root && mkdir -p ros2_workspace/src && \
    cd ros2_workspace/src && \
    git clone https://github.com/cmorganBE/ros2_server_example.git && \
    git clone https://github.com/cmorganBE/ros2_idl_example.git && \
    cd ros2_idl_example && git checkout 7091c75045f26d

# build the workspace
RUN cd /root/ros2_workspace && \
    source /opt/ros/foxy/setup.bash && \
    colcon build --symlink-install

CMD ["bash"]

I'm not planning or using the connext dds implementation but it looks like somehow this build expects it, although there aren't any errors about missing tools to generate the idl libraries either....

The output from the failed build is:

...
Removing intermediate container 904c18a2ae5a
 ---> fc53bea5cc02
Step 5/6 : RUN cd /root/ros2_workspace &&     source /opt/ros/foxy/setup.bash &&     colcon build --symlink-install
 ---> Running in 0f75521896ba
[connext_cmake_module] Warning: The location at which Connext was found when the workspace was built [[/opt/rti.com/rti_connext_dds-5.3.1]] does not point to a valid directory, and the NDDSHOME environment variable has not been set. Support for Connext will not be available.
Starting >>> ros2_idl_example
--- stderr: ros2_idl_example
CMake Error at /opt/ros/foxy/share/rosidl_generator_py/cmake/rosidl_generator_py_generate_interfaces.cmake:276 (add_dependencies):
  The dependency target "ros2_idl_example__rosidl_typesupport_connext_c" of
  target "ros2_idl_example__rosidl_typesupport_connext_c__pyext" does not
  exist.
Call Stack (most recent call first):
  /opt/ros/foxy/share/ament_cmake_core/cmake/core/ament_execute_extensions.cmake:48 (include)
  /opt/ros/foxy/share/rosidl_cmake/cmake/rosidl_generate_interfaces.cmake:286 (ament_execute_extensions)
  CMakeLists.txt:26 (rosidl_generate_interfaces)


CMake Generate step failed.  Build files cannot be regenerated correctly.
---
Failed   <<< ros2_idl_example   [ Exited with code 1 ]

Summary: 0 packages finished [1.91s]
  1 package failed: ros2_idl_example
  1 package had stderr output: ros2_idl_example
  1 package not processed
The command '/bin/bash -c cd /root/ros2_workspace &&     source /opt/ros/foxy/setup.bash &&     colcon build --symlink-install' returned a non-zero code: 1
cmorgan@cmorgan-bec:~/projects/ros2_docker/publictest$