ruff-format

Format current directory

$ ruff format

$ ruff format [file.py]

$ ruff format --check

$ ruff format --diff

ruff format [options] [files...]

ruff format is the code formatting subcommand of Ruff, providing a Black-compatible Python formatter written in Rust. It enforces consistent code style by reformatting Python source files according to opinionated rules covering indentation, line length, string quoting, and whitespace.
The --check flag validates formatting without modifying files, returning a non-zero exit code if changes would be made, which is useful for CI pipelines. The --diff flag displays the exact changes that would be applied. Configuration options like --line-length can be set per-project in pyproject.toml or ruff.toml.

--check

Check without modifying.

Show formatting diff.

Configuration file.

Maximum line length.

ruff(1), ruff-check(1), black(1)