Brent Westbrook aad0e909ef Allow rules without codes (#28049) ...

Summary
--

This PR allows adding rules that only belong to categories and only have
names rather than requiring
a linter group and code.

The first non-empty commit uses `Rule::name` instead of
`Rule::noqa_code` throughout the linter tests, causing a huge number of
file renames without changes.

The second commit updates `FixTable` from a mapping of `SecondaryCode ->
(name, fix_count)` to
`DiagnosticId -> (Option<SecondaryCode>, fix_count)`. This doesn't
really change its usage but
involves minor diffs to a substantial number of lines. It also allows us
to drop some of the special
`hashbrown` handling and the `hashbrown` dependency in `ruff_linter`,
which is nice.

The third commit contains the bulk of the change, including the macro
changes needed to support
`map_codes` entries like that for the `pytest-fixture-autouse` rule in
the fourth commit:

```rust
() => rules::ruff::rules::PytestFixtureAutouse,
```

These changes are pretty mechanical overall, just handling cases where
the linter or noqa code could
be missing, which fortunately seemed pretty straightforward in every
case.

The fourth commit takes advantage of these changes to reinstate `RUF076`
as our first purely
`pedantic` rule. I'm happy to drop that if it's too controversial or
opens too many questions about
the previously-removed rule and its code, but I thought it was nice to
have a motivating example. We
moved this rule from `preview` to `removed` because it was too pedantic
for the `RUF` category, even
in preview, so it's exactly the kind of rule we can support now with the
categories.

Finally, the fifth commit updates the contributing docs to reflect that
linters and codes are
optional. This may need to be adjusted if we back out the `RUF076`
change.

Test Plan
--

Existing tests, plus a few new ones for `pytest-fixture-autouse`

2026-08-27 11:26:35 -04:00

..

py-fuzzer

Use build backends with fewer dependencies for Python tooling (#27886)

2026-08-19 15:21:56 +00:00

ruff

Update the Python module (notably find_ruff_bin) for parity with uv (#23406)

2026-02-20 13:18:57 +00:00

ruff-ecosystem

Allow rules without codes (#28049)

2026-08-27 11:26:35 -04:00