`ruff server` appears to resolve configuration files differently to `ruff check`

[lewis6991]

Summary

I have a project with this structure:

├── pyproject.toml
└── sub/
    ├── main.py
    └── pyproject.toml

ruff server seems to always use the pyproject.toml defined in the root, even if ruff server is called with cwd set to sub. This is inconsistent with ruff check.

Reproduction steps:

mkdir ruff_issue
cd ruff_issue
git init
echo '[tool.ruff]\nexclude=["sub"]' > pyproject.toml
mkdir sub
touch sub/pyproject.toml
echo 'print "Hello world!"' > sub/main.py

git add \
    pyproject.toml
    sub/pyproject.toml \
    sub/main.py

git commit -m "Initial commit"

ruff check # uses root pyproject.toml, reports no issues, expected
# ruff server with cwd set to root, reports no issues, expected

cd sub

ruff check # uses sub/pyproject.toml, reports issues, expected
# ruff server with cwd set to sub, reports no issues, NOT EXPECTED

I don't know how to get diagnostics from ruff server without using an editor. I'm currently using Neovim with the default config defined in https://github.com/neovim/nvim-lspconfig which simply calls ruff server in the directory of the closest pyproject.toml in a bottom-up search.

Version

ruff 0.14.0

[MichaReiser]

Can you try setting `logLevel to debug and share the logs. It might help us understand what's going on here.