astral-sh/ruff

Ruff extension does not respect lines-after-imports from ruff.toml

Open

#17,558 opened on Apr 15, 2025

View on GitHub
 (6 comments) (0 reactions) (0 assignees)Rust (2,088 forks)batch import
documentationformatterhelp wantedincompatibilityisort

Repository metrics

Stars
 (47,527 stars)
PR merge metrics
 (Avg merge 5d 4h) (463 merged PRs in 30d)

Description

For a ruff.toml file at the root of my repo:

line-length = 120
target-version = "py311"
[lint.isort]
lines-after-imports = 1

... it appears that the setting to use a single line after the imports is ignored by the extension, resulting in the file that is formatted on save having errors according to the command line tool

I am fairly sure the file is being loaded because I am able to change the line-length parameter, restart the extension, and see matching fixes being applied.

Contributor guide

Research direction
Investigate how the Ruff extension loads ruff.toml configuration, specifically the isort section, and compare the behavior with the CLI tool. Trace the code path for applying lint.isort settings to find why lines after imports is not respected.
Tech stack
rustpythontypescript
Domain
backendtooling
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonGitRuff extension
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60