Policy CMP0148

[KoaBou]

Hi,
When I try to build the package I meet this warning:

---

--- stderr: yolov8_ros
/home/ntnguyen/.local/lib/python3.8/site-packages/setuptools/_distutils/cmd.py:66: SetuptoolsDeprecationWarning: setup.py install is deprecated.
!!

    ********************************************************************************
    Please avoid running ``setup.py`` directly.
    Instead, use pypa/build, pypa/installer or other
    standards-based tools.

    See https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for details.
    ********************************************************************************

!!
self.initialize_options()

Finished <<< yolov8_ros [1.08s]
Starting >>> yolov8_bringup
--- stderr: yolov8_bringup
CMake Warning (dev) at /opt/ros/foxy/share/ament_cmake_core/cmake/core/python.cmake:22 (find_package):
Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs modules
are removed. Run "cmake --help-policy CMP0148" for policy details. Use
the cmake_policy command to set the policy and suppress this warning.

Call Stack (most recent call first):
/opt/ros/foxy/share/ament_cmake_core/cmake/core/all.cmake:53 (include)
/opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_core-extras.cmake:17 (include)
/opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_coreConfig.cmake:41 (include)
/opt/ros/foxy/share/ament_cmake/cmake/ament_cmake_export_dependencies-extras.cmake:15 (find_package)
/opt/ros/foxy/share/ament_cmake/cmake/ament_cmakeConfig.cmake:41 (include)
CMakeLists.txt:9 (find_package)
This warning is for project developers. Use -Wno-dev to suppress it.

---

When I launched the package I met this error:
/opt/ros/foxy/bin/ros2:6: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
from pkg_resources import load_entry_point
[INFO] [launch]: All log files can be found below /home/ntnguyen/.ros/log/2023-08-17-11-59-28-750244-trunkngin-9360
[INFO] [launch]: Default logging verbosity is set to INFO
Task exception was never retrieved
future: <Task finished name='Task-2' coro=<LaunchService._process_one_event() done, defined at /opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py:226> exception=InvalidLaunchFileError('py')>
Traceback (most recent call last):
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py", line 53, in get_launch_description_from_any_launch_file
return loader(launch_file_path)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/python_launch_file_utilities.py", line 62, in get_launch_description_from_python_launch_file
launch_file_module = load_python_launch_file_as_module(python_launch_file_path)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/python_launch_file_utilities.py", line 37, in load_python_launch_file_as_module
loader.exec_module(mod)
File "", line 844, in exec_module
File "", line 980, in get_code
File "", line 1037, in get_data
FileNotFoundError: [Errno 2] No such file or directory: '/home/ntnguyen/gcamp_ros2_ws/install/yolov8_bringup/share/yolov8_bringup/launch/yolov8.launch.py'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 228, in _process_one_event
await self.__process_event(next_event)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 248, in __process_event
visit_all_entities_and_collect_futures(entity, self.__context))
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 38, in visit_all_entities_and_collect_futures
sub_entities = entity.visit(context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/action.py", line 108, in visit
return self.execute(context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/include_launch_description.py", line 130, in execute
launch_description = self.__launch_description_source.get_launch_description(context)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_source.py", line 84, in get_launch_description
self._get_launch_description(self.__expanded_location)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_description_source.py", line 53, in _get_launch_description
return get_launch_description_from_any_launch_file(location)
File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py", line 56, in get_launch_description_from_any_launch_file
raise InvalidLaunchFileError(extension, likely_errors=exceptions)
launch.invalid_launch_file_error.InvalidLaunchFileError: Caught exception when trying to load file of format [py]: [Errno 2] No such file or directory: '/home/ntnguyen/gcamp_ros2_ws/install/yolov8_bringup/share/yolov8_bringup/launch/yolov8.launch.py'

[mgonzs13]

Hi @KoaBou, for the first warning about the setup.py, this is something that comes from colcon colcon/colcon-core#454.
Have you source the install directory before running the launch file?

[KoaBou]

Sorry for the late reply
@mgonzs13 I certainly source the install directory, I think this error comes from the CMake version, but I don't know why it can't find yolov8.launch.py on the directory. I also used another ros-wrapped Yolo version and met the same error.

[mgonzs13]

Try reducing the cmake version in the CMakeLists.txt file or update it. Have check if the yolov8.launch.py file is in ~/ros2_ws/install/yolov8_bringup/share/yolov8_bringup/launch?