I am using ruff.toml for my configuration and my Python package is configured with pyproject.toml.

In my ruff configuration, I omitted target_version.

I am using ruff v0.0.270.

When I launch ruff check -v . from the root of my repository I get,

[2023-06-06][13:32:44][ruff::settings::pyproject][DEBUG] project.requires_python in pyproject.toml will not be used to set target_version when using ruff.toml.

If the expected behavior (infer from pyproject.toml) is not supported from ruff.toml, I think that the documentation should be clearer.

If instead this is supposed to work maybe it's a bug or I missed something...