ruff/docs/usage.md
2023-03-13 14:06:51 -04:00

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# Using Ruff
To run Ruff, try any of the following:
```shell
ruff check . # Lint all files in the current directory (and any subdirectories)
ruff check path/to/code/ # Lint all files in `/path/to/code` (and any subdirectories)
ruff check path/to/code/*.py # Lint all `.py` files in `/path/to/code`
ruff check path/to/code/to/file.py # Lint `file.py`
```
You can run Ruff in `--watch` mode to automatically re-run on-change:
```shell
ruff check path/to/code/ --watch
```
Ruff can also be used as a [pre-commit](https://pre-commit.com) hook:
```yaml
- repo: https://github.com/charliermarsh/ruff-pre-commit
# Ruff version.
rev: 'v0.0.255'
hooks:
- id: ruff
```
Or, to enable autofix:
```yaml
- repo: https://github.com/charliermarsh/ruff-pre-commit
# Ruff version.
rev: 'v0.0.255'
hooks:
- id: ruff
args: [--fix, --exit-non-zero-on-fix]
```
Note that Ruff's pre-commit hook should run before Black, isort, and other formatting tools.
Ruff can also be used as a [VS Code extension](https://github.com/charliermarsh/ruff-vscode) or
alongside any other editor through the [Ruff LSP](https://github.com/charliermarsh/ruff-lsp).