Error: "add_action_files() directory not found", but msg and srv building fine

[autonomobil]

The ros package has the following structure:

custom_msg_pkg
├── CMakeLists.txt  
├── package.xml                               
├── action
│   └── some_action.action                 # Action files
├── srv
│   └── some_service.srv                 # Service files
├── msg
│   └── some_message.msg                 # Messages files 

When building (catkin build custom_msg_pkg) I'm getting the following error:

Errors     << custom_msg_pkg:check /home/user/catkin_ws/logs/custom_msg_pkg/build.check.003.log                                                                                                                                                                   
CMake Error at /opt/ros/melodic/share/actionlib_msgs/cmake/actionlib_msgs-extras.cmake:20 (message):
  add_action_files() directory not found:
  /home/user/catkin_ws/src/project/custom_msg_pkg//home/user/catkin_ws/src/project/custom_msg_pkg/action
Call Stack (most recent call first):
  /opt/ros/melodic/share/mrt_cmake_modules/cmake/mrt_cmake_modules-macros.cmake:429 (add_action_files)
  CMakeLists.txt:46 (mrt_add_action_files)


make: *** [cmake_check_build_system] Error 1
cd /home/user/catkin_ws/build/custom_msg_pkg; catkin build --get-env custom_msg_pkg | catkin env -si  /usr/bin/make cmake_check_build_system; cd -
.......................................................................................................................................................................................................................................................
Failed     << custom_msg_pkg:check          [ Exited with code 2 ]                                                                                                                                                                                           
Failed    <<< custom_msg_pkg                [ 0.6 seconds ]                                                                                                                                                                                                  
[build] Summary: 0 of 1 packages succeeded.                                                                                                                                                                                                            
[build]   Ignored:   22 packages were skipped or are blacklisted.                                                                                                                                                                                      
[build]   Warnings:  None.                                                                                                                                                                                                                             
[build]   Abandoned: None.                                                                                                                                                                                                                             
[build]   Failed:    1 packages failed.                                                                                                                                                                                                                
[build] Runtime: 0.7 seconds total.  

If I comment out mrt_add_action_files(action) in CMakeLists.txt everything builds fine.

Does it have to do something with this difference:

mrt_cmake_modules/cmake/mrt_cmake_modules-macros.cmake

Lines 468 to 469 in 81d1b54

	if(_ROS_SERVICE_FILES)
	add_service_files(FILES ${_ROS_SERVICE_FILES} DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/${folder_name}")

vs.

mrt_cmake_modules/cmake/mrt_cmake_modules-macros.cmake

Lines 477 to 478 in 81d1b54

	if(_ROS_ACTION_FILES)
	add_action_files(FILES ${_ROS_ACTION_FILES} DIRECTORY "${folder_name}")

[autonomobil]

Ah it seems that somehow my system has an old version (installed via http://wiki.ros.org/mrt_cmake_modules - sudo apt-get install ros-melodic-mrt-cmake-modules ) and I don't have this change on my system efde1cf#diff-4d4a941bac21cf7c8bfb4aedb3230e5a795d9e3b9665d6bd7b2f40292fb0b376

[autonomobil]

sudo apt update && 
sudo apt upgrade ros-melodic-mrt-cmake-modules && 
sudo apt install --reinstall ros-melodic-mrt-cmake-modules 

did not help. It seems to be a version from 15.10.2020?

Get:1 http://packages.ros.org/ros/ubuntu bionic/main amd64 ros-melodic-mrt-cmake-modules amd64 1.0.4-1bionic.20201015.070233 [61,8 kB]
Fetched 61,8 kB in 1s (78,7 kB/s)                        
(Reading database ... 389485 files and directories currently installed.)
Preparing to unpack .../ros-melodic-mrt-cmake-modules_1.0.4-1bionic.20201015.070233_amd64.deb ...
Unpacking ros-melodic-mrt-cmake-modules (1.0.4-1bionic.20201015.070233) over (1.0.4-1bionic.20201015.070233) ...
Setting up ros-melodic-mrt-cmake-modules (1.0.4-1bionic.20201015.070233) ...

[wienans]

Hey @JohannesBeck
would it be possible to update the apt package for melodic and noetic?