colcon build warnings on Ubuntu 22.04

[Jeff Ichnowski]

Describe the bug
colcon generates warnings during builds on Ubuntu 22.04. See screenshot.

To Reproduce

cd ~/fog_ws
colcon build --merge-install

Expected behavior
No warnings.

Screenshots

$ colcon build --merge-install
Starting >>> fogros2 
Starting >>> fogros2_examples
--- stderr: fogros2_examples                                                
/usr/lib/python3/dist-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
---
Finished <<< fogros2_examples [2.28s]
--- stderr: fogros2                   
/usr/lib/python3/dist-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
---
Finished <<< fogros2 [2.32s]

Summary: 2 packages finished [2.67s]
  2 packages had stderr output: fogros2 fogros2_examples

[Kaiyuan Eric Chen]

Actually, if you build ros from source, this error occurs to most of the packages. But i didn’t look into why this is the case

[Kaiyuan Eric Chen]

https://answers.ros.org/question/396439/setuptoolsdeprecationwarning-setuppy-install-is-deprecated-use-build-and-pip-and-other-standards-based-tools/
It seems the solution is to downgrade python from 3.10 to 3.8. Should we close this issue since the issue is not on our side?

[Mike Danielczuk]

@KeplerC the python versioning only makes sense for Ubuntu 20.04 where Python 3.8 is the default install. However, in 22.04, Python 3.10 will be the default. Looks like colcon is tracking this issue already though: colcon/colcon-core#454

[Kaiyuan Eric Chen]

Close this issue as it is tracked in elsewhere.

[Jeychandar]

I am new to this ..can you help me out! Thanks in advance