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Revive https://github.com/astral-sh/ruff/pull/15341 as it got removed from the latest rebase in https://github.com/astral-sh/ruff/pull/15238.
26 lines
1.5 KiB
Markdown
26 lines
1.5 KiB
Markdown
# Ruff Formatter
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The Ruff formatter is an extremely fast Python code formatter that ships as part of the `ruff`
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CLI.
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## Goals
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The formatter is designed to be a drop-in replacement for [Black](https://github.com/psf/black),
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but with an excessive focus on performance and direct integration with Ruff.
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Specifically, the formatter is intended to emit near-identical output when run over Black-formatted
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code. When run over extensive Black-formatted projects like Django and Zulip, > 99.9% of lines
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are formatted identically. When migrating an existing project from Black to Ruff, you should expect
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to see a few differences on the margins, but the vast majority of your code should be unchanged.
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If you identify deviations in your project, spot-check them against the [intentional deviations](https://docs.astral.sh/ruff/formatter/black/)
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enumerated below, as well as the [unintentional deviations](https://github.com/astral-sh/ruff/issues?q=is%3Aopen+is%3Aissue+label%3Aformatter)
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filed in the issue tracker. If you've identified a new deviation, please [file an issue](https://github.com/astral-sh/ruff/issues/new).
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When run over _non_-Black-formatted code, the formatter makes some different decisions than Black,
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and so more deviations should be expected, especially around the treatment of end-of-line comments.
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For details, see [Style Guide](https://docs.astral.sh/ruff/formatter/#style-guide).
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## Getting started
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Head to [The Ruff Formatter](https://docs.astral.sh/ruff/formatter/) for usage instructions and a comparison to Black.
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