README.md

Ruff extension for Visual Studio Code

A Visual Studio Code extension with support for the Ruff linter. Available on the Visual Studio Marketplace.

The extension ships with ruff==0.0.287.

(Interested in using Ruff with another editor? Check out ruff-lsp.)

Highlights

"Quick Fix" actions for auto-fixable violations (like unused imports)

"Fix all": automatically fix all auto-fixable violations

"Organize Imports": isort-compatible import sorting

Usage

Once installed in Visual Studio Code, ruff will automatically execute when you open or edit a Python file.

If you want to disable Ruff, you can disable this extension per workspace in Visual Studio Code.

Fix safety

Ruff's automatic fixes are labeled as "safe" and "unsafe". By default, the "Fix all" action will not apply unsafe fixes. However, unsafe fixes can be applied manually with the "Quick fix" action. Application of unsafe fixes when using "Fix all" can be enabled by setting unsafe-fixes = true in your Ruff configuration file or adding --unsafe-fixes flag to the "Lint args" setting.

See the Ruff fix docs for more details on how fix safety works.

Settings

Settings	Default	Description
args	[]	Additional command-line arguments to pass to ruff, e.g., "args": ["--config=/path/to/pyproject.toml"]. Supports a subset of Ruff's command-line arguments, ignoring those that are required to operate the LSP, like --force-exclude and --verbose.
path	[]	Path to a custom ruff executable, e.g., ["/path/to/ruff"].
interpreter	[]	Path to a Python interpreter to use to run the linter server.
importStrategy	fromEnvironment	Strategy for loading the ruff executable. fromEnvironment picks up Ruff from the environment, falling back to the bundled version if needed. useBundled uses the version bundled with the extension.
run	onType	Run Ruff on every keystroke (onType) or on save (onSave).
enable	true	Whether to enable the Ruff extension. Modifying this setting requires restarting VS Code to take effect.
organizeImports	true	Whether to register Ruff as capable of handling source.organizeImports actions.
fixAll	true	Whether to register Ruff as capable of handling source.fixAll actions.
codeAction.fixViolation.enable	true	Whether to display Quick Fix actions to autofix violations.
codeAction.disableRuleComment.enable	true	Whether to display Quick Fix actions to disable rules via noqa suppression comments.
showNotification	off	Setting to control when a notification is shown: off, onError, onWarning, always.

Example configurations

You can configure Ruff to autofix violations on-save by enabling the source.fixAll action in settings.json:

{
  "[python]": {
    "editor.codeActionsOnSave": {
      "source.fixAll": true
    }
  }
}

You can configure Ruff to organize imports on-save by enabling the source.organizeImports action in settings.json:

{
  "[python]": {
    "editor.codeActionsOnSave": {
      "source.organizeImports": true
    }
  }
}

If you're using the VS Code Python extension, you can configure VS Code to autofix violations on-save using Ruff, then re-format with Black, via the following settings.json:

{
  "[python]": {
    "editor.formatOnSave": true,
    "editor.codeActionsOnSave": {
      "source.fixAll": true
    }
  },
  "python.formatting.provider": "black"
}

If you'd like to use Ruff as an autofix linter, but continue to sort imports with the isort VS Code extension, you can disable Ruff's import-sorting capabilities via the following settings.json:

{
  "[python]": {
    "editor.codeActionsOnSave": {
      "source.fixAll": true,
      "source.organizeImports": true
    }
  },
  "ruff.organizeImports": false
}

If you'd like to run Ruff on-save, but avoid enabling other extensions to run on-save, you can use Ruff's scoped source.fixAll and source.organizeImports actions via the following settings.json:

{
  "[python]": {
    "editor.codeActionsOnSave": {
      "source.fixAll.ruff": true,
      "source.organizeImports.ruff": true
    }
  }
}

If you'd like to run Ruff in lieu of another formatter altogether, be sure to unset the editor.defaultFormatter in settings.json:

{
  "[python]": {
    "editor.defaultFormatter": null,
    "editor.codeActionsOnSave": {
      "source.fixAll": true
    }
  }
}

Commands

Command	Description
Ruff: Fix all auto-fixable problems	Fix all auto-fixable problems.
Ruff: Restart Server	Force restart the linter server.

Requirements

This extension requires a version of the VSCode Python extension that supports Python 3.7+. Ruff itself is compatible with Python 3.7 to 3.11.

Development

This extension is based on the Template for VS Code Python tools extensions.

Getting Started

• Install just, or see the justfile for corresponding commands.
• Create and activate a virtual environment (e.g., python -m venv .venv && source .venv/bin/activate).
• Install development dependencies (just install).
• To automatically format the codebase, run: just fmt.
• To run lint and type checks, run: just check.
• To run tests, run: just test.

To run the extension, navigate to src/extension.ts and run (F5). You should see the LSP output and Python log messages in the debug console under "Python Server".

Modifying the LSP

• Clone ruff-lsp to, e.g., ../ruff-lsp.
• In ../ruff-lsp, run: pip install -t ../ruff-vscode/bundled/libs/ -e ..

Using a custom version of ruff

• Clone ruff to, e.g., /home/ferris/ruff.
• Run cargo build in the Ruff repository.
• Set "Ruff: Path" to /home/ferris/ruff/target/debug/ruff in the VS Code settings.

License

MIT