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Add prototype of ruff format for projects (#6871)

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**Summary** Add recursive formatting based on `ruff check` file
discovery for `ruff format`, as a prototype for the formatter alpha.
This allows e.g. `format ../projects/django/`. It's still lacking
support for any settings except line length.

Note just like the existing `ruff format` this will become part of the
production build, i.e. you'll be able to use it - hidden by default and
with a prominent warning - with `ruff format .` after the next release.

Error handling works in my manual tests (the colors do also work):

```
$  target/debug/ruff format scripts/
warning: `ruff format` is a work-in-progress, subject to change at any time, and intended for internal use only.
```
(the above changes `add_rule.py` where we have the wrong bin op
breaking)

```
$ target/debug/ruff format ../projects/django/
warning: `ruff format` is a work-in-progress, subject to change at any time, and intended for internal use only.
Failed to format /home/konsti/projects/django/tests/test_runner_apps/tagged/tests_syntax_error.py: source contains syntax errors: ParseError { error: UnrecognizedToken(Name { name: "syntax_error" }, None), offset: 131, source_path: "<filename>" }
```

```
$ target/debug/ruff format a
warning: `ruff format` is a work-in-progress, subject to change at any time, and intended for internal use only.
Failed to read /home/konsti/ruff/a/d.py: Permission denied (os error 13)
```

**Test Plan** Missing! I'm not sure if it's worth building tests at this
stage or how they should look like.
This commit is contained in:
konsti 2023-08-27 21:12:18 +02:00 • committed by GitHub
parent 059757a8c8
commit c2413dcd2c
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7 changed files with 142 additions and 16 deletions
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4
crates/ruff_python_formatter/src/lib.rs
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@ -99,9 +99,9 @@ where
#[derive(Error, Debug)]
pub enum FormatModuleError {
#[error("source contains syntax errors (lexer error): {0:?}")]
#[error("source contains syntax errors: {0:?}")]
LexError(LexicalError),
#[error("source contains syntax errors (parser error): {0:?}")]
#[error("source contains syntax errors: {0:?}")]
ParseError(ParseError),
#[error(transparent)]
FormatError(#[from] FormatError),