How to use Eclipse IDE for developing Ros2 packages?

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I think I figured it out after looking at the arguments/options differences between catkin_tools and colcon.

Here is an example of what I did usingros2_example_ws, which is assumed to have been already cloned and built previously with just colcon build as specified in the Using Colcon to build packages Tutorial. My additional steps were:

From a terminal:

~/ros2_example_ws$ . install/setup.bash
~/ros2_example_ws$ colcon build --cmake-force-configure --cmake-args -G"Eclipse CDT4 - Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug

Then, from another terminal:

• Source the workspace again (e.g. ~/ros2_example_ws$ . install/setup.bash)

• launch eclipse (I haven't tried launching Eclipse outside of the terminal yet)

• In Eclipse, do the Import > Existing Project and navigate to the project of interest (e.g. ~/ros2_example_ws/build/examples_rclcpp_minimal_subscriber/), and import this.

• The executable will show in the Project's Binaries view, so the "node" can be run from there or modified within the Run/Debug Configurations as needed.

NOTE: The -DCMAKE_BUILD_TYPE=Debug in the --cmake-args is only needed if building with Debug flags is desired.