Update pre-commit documentation (#57)
I got some feedback on Mastodon that it wasn't clear how to use the linter and formatter together in pre-commit. This also removes `--exit-non-zero-on-fix`, since pre-commit already exits if files are changed, and changes our recommendation to always put the formatter after the linter, since if a previous tool ends up committing changes, pre-commit should fail anyway.
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README.md
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README.md
@ -13,67 +13,59 @@ Distributed as a standalone repository to enable installing Ruff via prebuilt wh
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### Using Ruff with pre-commit
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Add this to your `.pre-commit-config.yaml`:
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To run Ruff's [linter](https://docs.astral.sh/ruff/linter) and [formatter](https://docs.astral.sh/ruff/formatter)
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(available as of Ruff v0.0.289) via pre-commit, add the following to your `.pre-commit-config.yaml`:
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```yaml
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- repo: https://github.com/astral-sh/ruff-pre-commit
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# Ruff version.
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rev: v0.1.4
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hooks:
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# Run the linter.
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- id: ruff
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```
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Or, to enable autofix:
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```yaml
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- repo: https://github.com/astral-sh/ruff-pre-commit
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# Ruff version.
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rev: v0.1.4
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hooks:
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- id: ruff
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args: [--fix, --exit-non-zero-on-fix]
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```
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To run the hook on Jupyter Notebooks too:
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```yaml
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- repo: https://github.com/astral-sh/ruff-pre-commit
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# Ruff version.
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rev: v0.1.4
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hooks:
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- id: ruff
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types_or: [python, pyi, jupyter]
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```
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Ruff's pre-commit hook should be placed after other formatting tools, such as Black and isort,
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_unless_ you enable autofix, in which case, Ruff's pre-commit hook should run _before_ Black, isort,
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and other formatting tools, as Ruff's autofix behavior can output code changes that require
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reformatting.
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### Using Ruff's formatter (unstable)
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[Ruff's formatter](https://docs.astral.sh/ruff/formatter) can used with pre-commit by adding the `ruff-format` hook:
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```yaml
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- repo: https://github.com/astral-sh/ruff-pre-commit
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# Ruff version.
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rev: v0.1.4
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hooks:
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# Run the formatter.
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- id: ruff-format
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```
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To check formatting without changing files, use `--check`:
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To enable lint fixes, add the `--fix` argument to the lint hook:
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```yaml
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- repo: https://github.com/astral-sh/ruff-pre-commit
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# Ruff version.
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rev: v0.1.4
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hooks:
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# Run the linter.
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- id: ruff
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args: [ --fix ]
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# Run the formatter.
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- id: ruff-format
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args: [--check]
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```
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Note `v0.0.290` is the minimum version that provides the `ruff-format` hook.
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To run the hooks over Jupyter Notebooks too, add `jupyter` to the list of allowed filetypes:
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```yaml
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- repo: https://github.com/astral-sh/ruff-pre-commit
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# Ruff version.
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rev: v0.1.4
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hooks:
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# Run the linter.
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- id: ruff
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types_or: [ python, pyi, jupyter ]
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args: [ --fix ]
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# Run the formatter.
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- id: ruff-format
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types_or: [ python, pyi, jupyter ]
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```
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When running with `--fix`, Ruff's lint hook should be placed _before_ Ruff's formatter hook, and
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_before_ Black, isort, and other formatting tools, as Ruff's fix behavior can output code changes
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that require reformatting.
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When running without `--fix`, Ruff's formatter hook can be placed before or after Ruff's lint hook.
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(As long as your Ruff configuration avoids any [linter-formatter incompatibilities](https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules),
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`ruff format` should never introduce new lint errors, so it's safe to run Ruff's format hook _after_
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`ruff check --fix`.)
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## License
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