Build gz_ros2_control for humble+harmonic

[Witty-Wizard]

System Config:

ROS Distro : Humble
Gazebo Version: Harmonic
Linux Version: Ubuntu Jammy (Running Inside Docker)

Help Needed:

I need help on how to install and setup gz_ros2_control plugin on ROS Humble with Gazebo Harmonic.

While Compiling from source I get the following error:

ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
gz_ros2_control: Cannot locate rosdep definition for [gz_plugin_vendor]
Continuing to install resolvable dependencies...
#All required rosdeps installed successfully

[christophfroehlich]

Have you read the compatibility table in the readme? This combination is not officially supported.
For humble distro you have to use the humble branch, because the *_vendor packages are not released for distros older than jazzy. But this might not work with harmonic, you can try to use the iron branch.

[Witty-Wizard]

Have you read the compatibility table in the readme? This combination is not officially supported. For humble distro you have to use the humble branch, because the *_vendor packages are not released for distros older than jazzy. But this might not work with harmonic, you can try to use the iron branch.

I have read the documentation, but I want to run harmonic with humble.

[christophfroehlich]

Have you tried humble or iron branch as suggested?

[Witty-Wizard]

I did try those branches, there is get dependency error

[christophfroehlich]

Sorry, this is just not supported. What you can try is to compile the iron version of the whole ros2_control stack, this could work on humble distro but without guarantee to be stable.

[Witty-Wizard]

I tried building using the iron branch, I got the Following error:

Starting >>> gz_ros2_control
--- stderr: gz_ros2_control                             
/home/jazzer/gz_ros2_control_ws/src/gz_ros2_control/gz_ros2_control/src/gz_ros2_control_plugin.cpp: In member function ‘virtual void gz_ros2_control::GazeboSimROS2ControlPlugin::Configure(const Entity&, const std::shared_ptr<const sdf::v14::Element>&, gz::sim::v8::EntityComponentManager&, gz::sim::v8::EventManager&)’:
/home/jazzer/gz_ros2_control_ws/src/gz_ros2_control/gz_ros2_control/src/gz_ros2_control_plugin.cpp:428:67: error: ‘__gnu_cxx::__alloc_traits<std::allocator<hardware_interface::HardwareInfo>, hardware_interface::HardwareInfo>::value_type’ {aka ‘struct hardware_interface::HardwareInfo’} has no member named ‘hardware_plugin_name’
  428 |     std::string robot_hw_sim_type_str_ = control_hardware_info[i].hardware_plugin_name;
      |                                                                   ^~~~~~~~~~~~~~~~~~~~
gmake[2]: *** [CMakeFiles/gz_ros2_control-system.dir/build.make:76: CMakeFiles/gz_ros2_control-system.dir/src/gz_ros2_control_plugin.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:139: CMakeFiles/gz_ros2_control-system.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....
gmake: *** [Makefile:146: all] Error 2

This might be fixable with some tweaking in the source code.
I will try and update it here.

[Witty-Wizard]

I tried building using the iron branch, I got the Following error:

Starting >>> gz_ros2_control
--- stderr: gz_ros2_control                             
/home/jazzer/gz_ros2_control_ws/src/gz_ros2_control/gz_ros2_control/src/gz_ros2_control_plugin.cpp: In member function ‘virtual void gz_ros2_control::GazeboSimROS2ControlPlugin::Configure(const Entity&, const std::shared_ptr<const sdf::v14::Element>&, gz::sim::v8::EntityComponentManager&, gz::sim::v8::EventManager&)’:
/home/jazzer/gz_ros2_control_ws/src/gz_ros2_control/gz_ros2_control/src/gz_ros2_control_plugin.cpp:428:67: error: ‘__gnu_cxx::__alloc_traits<std::allocator<hardware_interface::HardwareInfo>, hardware_interface::HardwareInfo>::value_type’ {aka ‘struct hardware_interface::HardwareInfo’} has no member named ‘hardware_plugin_name’
  428 |     std::string robot_hw_sim_type_str_ = control_hardware_info[i].hardware_plugin_name;
      |                                                                   ^~~~~~~~~~~~~~~~~~~~
gmake[2]: *** [CMakeFiles/gz_ros2_control-system.dir/build.make:76: CMakeFiles/gz_ros2_control-system.dir/src/gz_ros2_control_plugin.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:139: CMakeFiles/gz_ros2_control-system.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....
gmake: *** [Makefile:146: all] Error 2

This might be fixable with some tweaking in the source code. I will try and update it here.

I Did It!!!

changing hardware_plugin_name to hardware_class_type in the gz_ros2_control_plugin.cpp file did the trick.
This works because hardware_plugin_name has been changed to hardware_class_type for ros humble.

I will create a new branch in my fork called humble-harmonic.

[christophfroehlich]

fyi, there is a similar fork for humble+garden: #268

It might have been possible to also compile iron version of ros2_control+controllers from source instead of changing the variable, for example with this repos file.

[Witty-Wizard]

fyi, there is a similar fork for humble+garden: #268

It might have been possible to also compile iron version of ros2_control+controllers from source instead of changing the variable, for example with this repos file.

That is the idea, I am trying to understand the CI process so that I can publish a branch, and make it available through apt, this way I can use it in my docker image.
Can you direct to some resource on how can i share the binaries so that they don't need to be build every time

[christophfroehlich]

THB I don't think that this is worth it.
But if you want to fork this repo you could release it as independent package on the ROS buildfarm. Or you use github to build the debian and release it.

[Witty-Wizard]

THB I don't think that this is worth it.

But if you want to fork this repo you could release it as independent package on the ROS buildfarm. Or you use github to build the debian and release it.

Thanks! I will do that and update here.
Till then I am closing the issue.