ament_ruff

[Nils-ChristianIseke]

Note:
The code changes are currently preliminary and not yet finalized. I’m not seeking feedback on the implementation at this stage.

ament_ruff
I’m new to ament_lint, so I’m not fully aware of all the implications of adding a new tool. I wanted to use this as a starting point to settle the discussion on whether we should support Ruff. Feel free to get the discussion rolling before I invest much effort into it! :)

There has already been a discussion on this topic on ROS Discourse:
Recommended Way to Format Python Code

This PR aims to adds ament_ruff, a fast and modern Python linting and formatting tool, to ament_lint. Ruff combines the functionality of ament_flake8, ament-pydocstyle, ament_pyflakes, ament_pep257 into a single, high-performance tool, simplifying the toolchain and improving developer productivity.

Key Benefits:

• Speed: Ruff is significantly faster than Flake8 and Black.
• All-in-One: Combines linting and formatting in one tool.

[christophebedard]

See this relevant issue: #497

[DangitBen]

Not trying to advertise, but there is now an ament_ruff package and accompanying cmake hook package (discourse post here). It could be used as a starting point for this PR, or as-is by users via source or pip (cli tool only).

The repo I linked could still use:

• Some better error reporting to pytest
• More testing and feedback from users with large python ros packages
  • Especially to see how it works as a drop-in for ament_flake8
• A better/more confidence inspiring pypi page
• A way to install the ament_cmake_ruff portion of the tool