Summary

Given:

.
├── projects
│   └── brown-lentil
│       ├── brown_lentil
│       │   └── subdir
│       │       └── soup.py
│       └── pyproject.toml
└── ruff.toml

where pyproject.toml is empty and ruff.toml just has [lint]\nselect = ["I"]

and where soup.py imports typing, pytest, and brown_lentil, ruff check --fix projects/brown-lentil/brown_lentil/subdir/soup.py will result in:

import typing  # TODO: Does EVERY module need to import this??

import brown_lentil
import pytest  # Always good to test your soup first

I think what's happening here is that:

• Ruff is using the directory containing the ruff.toml as the "project root"
  • If I put a ruff.toml next to my pyproject.toml there, then it formats correctly
• The missing __init__.py in brown_lentil is bypassing Ruff's "same-package" check
  • IDK if this is a bug or a feature, but maybe should be documented. I'll make a separate PR

Ideally, the existence of a pyproject.toml (even one not containing [tool.ruff]) would mark this as a project root (it is called a "py project" file after all 😉)

Version

ruff 0.15.2