Bump 0.12.0 (#18724)

- [x] Updated changelog
- [x] Updated breaking changes

.gitattributes

@@ -5,6 +5,9 @@ crates/ruff_linter/resources/test/fixtures/pycodestyle/W605_1.py text eol=crlf
 crates/ruff_linter/resources/test/fixtures/pycodestyle/W391_2.py text eol=crlf
 crates/ruff_linter/resources/test/fixtures/pycodestyle/W391_3.py text eol=crlf
 
+crates/ruff_python_formatter/resources/test/fixtures/ruff/f-string-carriage-return-newline.py text eol=crlf
+crates/ruff_python_formatter/tests/snapshots/format@f-string-carriage-return-newline.py.snap text eol=crlf
+
 crates/ruff_python_formatter/resources/test/fixtures/ruff/docstring_code_examples_crlf.py text eol=crlf
 crates/ruff_python_formatter/tests/snapshots/format@docstring_code_examples_crlf.py.snap text eol=crlf
 

.github/mypy-primer-ty.toml

@@ -5,3 +5,4 @@
 [rules]
 possibly-unresolved-reference = "warn"
 unused-ignore-comment = "warn"
+division-by-zero = "warn"

.github/workflows/build-docker.yml

@@ -79,7 +79,7 @@ jobs:
       # Adapted from https://docs.docker.com/build/ci/github-actions/multi-platform/
       - name: Build and push by digest
         id: build
-        uses: docker/build-push-action@1dc73863535b631f98b2378be8619f83b136f4a0 # v6.17.0
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: .
           platforms: ${{ matrix.platform }}
@@ -231,7 +231,7 @@ jobs:
             ${{ env.TAG_PATTERNS }}
 
       - name: Build and push
-        uses: docker/build-push-action@1dc73863535b631f98b2378be8619f83b136f4a0 # v6.17.0
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
         with:
           context: .
           platforms: linux/amd64,linux/arm64

.github/workflows/ci.yaml

@@ -237,13 +237,13 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install mold"
-        uses: rui314/setup-mold@e16410e7f8d9e167b74ad5697a9089a35126eb50 # v1
+        uses: rui314/setup-mold@b3958095189f34b95d402a680b6e96b7f194f7b9 # v1
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-nextest
       - name: "Install cargo insta"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-insta
       - name: ty mdtests (GitHub annotations)
@@ -295,13 +295,13 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install mold"
-        uses: rui314/setup-mold@e16410e7f8d9e167b74ad5697a9089a35126eb50 # v1
+        uses: rui314/setup-mold@b3958095189f34b95d402a680b6e96b7f194f7b9 # v1
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-nextest
       - name: "Install cargo insta"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-insta
       - name: "Run tests"
@@ -324,7 +324,7 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-nextest
       - name: "Run tests"
@@ -380,7 +380,7 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install mold"
-        uses: rui314/setup-mold@e16410e7f8d9e167b74ad5697a9089a35126eb50 # v1
+        uses: rui314/setup-mold@b3958095189f34b95d402a680b6e96b7f194f7b9 # v1
       - name: "Build"
         run: cargo build --release --locked
 
@@ -405,13 +405,13 @@ jobs:
           MSRV: ${{ steps.msrv.outputs.value }}
         run: rustup default "${MSRV}"
       - name: "Install mold"
-        uses: rui314/setup-mold@e16410e7f8d9e167b74ad5697a9089a35126eb50 # v1
+        uses: rui314/setup-mold@b3958095189f34b95d402a680b6e96b7f194f7b9 # v1
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-nextest
       - name: "Install cargo insta"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-insta
       - name: "Run tests"
@@ -437,7 +437,7 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install cargo-binstall"
-        uses: cargo-bins/cargo-binstall@5cbf019d8cb9b9d5b086218c41458ea35d817691 # v1.12.5
+        uses: cargo-bins/cargo-binstall@ea65a39d2dcca142c53bddd3a097a674e903f475 # v1.12.7
         with:
           tool: cargo-fuzz@0.11.2
       - name: "Install cargo-fuzz"
@@ -459,7 +459,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+      - uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
       - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         name: Download Ruff binary to test
         id: download-cached-binary
@@ -660,7 +660,7 @@ jobs:
           branch: ${{ github.event.pull_request.base.ref }}
           workflow: "ci.yaml"
           check_artifacts: true
-      - uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+      - uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
       - name: Fuzz
         env:
           FORCE_COLOR: 1
@@ -690,7 +690,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
-      - uses: cargo-bins/cargo-binstall@5cbf019d8cb9b9d5b086218c41458ea35d817691 # v1.12.5
+      - uses: cargo-bins/cargo-binstall@ea65a39d2dcca142c53bddd3a097a674e903f475 # v1.12.7
       - run: cargo binstall --no-confirm cargo-shear
       - run: cargo shear
 
@@ -730,7 +730,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+      - uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
       - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
@@ -773,7 +773,7 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: Install uv
-        uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+        uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
       - name: "Install Insiders dependencies"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
         run: uv pip install -r docs/requirements-insiders.txt --system
@@ -910,7 +910,7 @@ jobs:
         run: rustup show
 
       - name: "Install codspeed"
-        uses: taiki-e/install-action@941e8a4d9d7cdb696bd4f017cf54aca281f8ffff # v2.51.2
+        uses: taiki-e/install-action@735e5933943122c5ac182670a935f54a949265c1 # v2.52.4
         with:
           tool: cargo-codspeed
 

.github/workflows/daily_fuzz.yaml

@@ -34,11 +34,11 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+      - uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install mold"
-        uses: rui314/setup-mold@e16410e7f8d9e167b74ad5697a9089a35126eb50 # v1
+        uses: rui314/setup-mold@b3958095189f34b95d402a680b6e96b7f194f7b9 # v1
       - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
       - name: Build ruff
         # A debug build means the script runs slower once it gets started,

.github/workflows/mypy_primer.yaml

@@ -11,6 +11,7 @@ on:
       - "crates/ruff_python_parser"
       - ".github/workflows/mypy_primer.yaml"
       - ".github/workflows/mypy_primer_comment.yaml"
+      - "Cargo.lock"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
@@ -36,7 +37,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+        uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
 
       - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
         with:

.github/workflows/publish-pypi.yml

@@ -22,7 +22,7 @@ jobs:
       id-token: write
     steps:
       - name: "Install uv"
-        uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+        uses: astral-sh/setup-uv@f0ec1fc3b38f5e7cd731bb6ce540c5af426746bb # v6.1.0
       - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           pattern: wheels-*

.github/workflows/release.yml

@@ -61,7 +61,7 @@ jobs:
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
+      - uses: actions/checkout@09d2acae674a48949e3602304ab46fd20ae0c42f
         with:
           persist-credentials: false
           submodules: recursive
@@ -124,7 +124,7 @@ jobs:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       BUILD_MANIFEST_NAME: target/distrib/global-dist-manifest.json
     steps:
-      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
+      - uses: actions/checkout@09d2acae674a48949e3602304ab46fd20ae0c42f
         with:
           persist-credentials: false
           submodules: recursive
@@ -175,7 +175,7 @@ jobs:
     outputs:
       val: ${{ steps.host.outputs.manifest }}
     steps:
-      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
+      - uses: actions/checkout@09d2acae674a48949e3602304ab46fd20ae0c42f
         with:
           persist-credentials: false
           submodules: recursive
@@ -251,7 +251,7 @@ jobs:
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
+      - uses: actions/checkout@09d2acae674a48949e3602304ab46fd20ae0c42f
         with:
           persist-credentials: false
           submodules: recursive

.github/workflows/sync_typeshed.yaml

@@ -60,7 +60,7 @@ jobs:
           cd ruff
           git push --force origin typeshedbot/sync-typeshed
           gh pr list --repo "$GITHUB_REPOSITORY" --head typeshedbot/sync-typeshed --json id --jq length | grep 1 && exit 0 # exit if there is existing pr
-          gh pr create --title "Sync vendored typeshed stubs" --body "Close and reopen this PR to trigger CI" --label "internal"
+          gh pr create --title "[ty] Sync vendored typeshed stubs" --body "Close and reopen this PR to trigger CI" --label "ty"
 
   create-issue-on-failure:
     name: Create an issue if the typeshed sync failed

.pre-commit-config.yaml

@@ -5,6 +5,7 @@ exclude: |
     .github/workflows/release.yml|
     crates/ty_vendored/vendor/.*|
     crates/ty_project/resources/.*|
+    crates/ty_python_semantic/resources/corpus/.*|
     crates/ty/docs/(configuration|rules|cli).md|
     crates/ruff_benchmark/resources/.*|
     crates/ruff_linter/resources/.*|
@@ -66,7 +67,7 @@ repos:
           - black==25.1.0
 
   - repo: https://github.com/crate-ci/typos
-    rev: v1.32.0
+    rev: v1.33.1
     hooks:
       - id: typos
 
@@ -80,7 +81,7 @@ repos:
         pass_filenames: false # This makes it a lot faster
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.11.10
+    rev: v0.11.13
     hooks:
       - id: ruff-format
       - id: ruff
@@ -98,7 +99,7 @@ repos:
   # zizmor detects security vulnerabilities in GitHub Actions workflows.
   # Additional configuration for the tool is found in `.github/zizmor.yml`
   - repo: https://github.com/woodruffw/zizmor-pre-commit
-    rev: v1.7.0
+    rev: v1.9.0
     hooks:
       - id: zizmor
 

BREAKING_CHANGES.md

@@ -1,5 +1,39 @@
 # Breaking Changes
 
+## 0.12.0
+
+- **Detection of more syntax errors**
+
+    Ruff now detects version-related syntax errors, such as the use of the `match`
+    statement on Python versions before 3.10, and syntax errors emitted by
+    CPython's compiler, such as irrefutable `match` patterns before the final
+    `case` arm.
+
+- **New default Python version handling for syntax errors**
+
+    Ruff will default to the _latest_ supported Python version (3.13) when
+    checking for the version-related syntax errors mentioned above to prevent
+    false positives in projects without a Python version configured. The default
+    in all other cases, like applying lint rules, is unchanged and remains at the
+    minimum supported Python version (3.9).
+
+- **Updated f-string formatting**
+
+    Ruff now formats multi-line f-strings with format specifiers to avoid adding a
+    line break after the format specifier. This addresses a change to the Python
+    grammar in version 3.13.4 that made such a line break a syntax error.
+
+- **`rust-toolchain.toml` is no longer included in source distributions**
+
+    The `rust-toolchain.toml` is used to specify a higher Rust version than Ruff's
+    minimum supported Rust version (MSRV) for development and building release
+    artifacts. However, when present in source distributions, it would also cause
+    downstream package maintainers to pull in the same Rust toolchain, even if
+    their available toolchain was MSRV-compatible.
+
+- **[`suspicious-xmle-tree-usage`](https://docs.astral.sh/ruff/rules/suspicious-xmle-tree-usage/)
+    (`S320`) has been removed**
+
 ## 0.11.0
 
 This is a follow-up to release 0.10.0. Because of a mistake in the release process, the `requires-python` inference changes were not included in that release. Ruff 0.11.0 now includes this change as well as the stabilization of the preview behavior for `PGH004`.

CHANGELOG.md

@@ -1,5 +1,224 @@
 # Changelog
 
+## 0.12.0
+
+Check out the [blog post](https://astral.sh/blog/ruff-v0.12.0) for a migration
+guide and overview of the changes!
+
+### Breaking changes
+
+- **Detection of more syntax errors**
+
+    Ruff now detects version-related syntax errors, such as the use of the `match`
+    statement on Python versions before 3.10, and syntax errors emitted by
+    CPython's compiler, such as irrefutable `match` patterns before the final
+    `case` arm.
+
+- **New default Python version handling for syntax errors**
+
+    Ruff will default to the _latest_ supported Python version (3.13) when
+    checking for the version-related syntax errors mentioned above to prevent
+    false positives in projects without a Python version configured. The default
+    in all other cases, like applying lint rules, is unchanged and remains at the
+    minimum supported Python version (3.9).
+
+- **Updated f-string formatting**
+
+    Ruff now formats multi-line f-strings with format specifiers to avoid adding a
+    line break after the format specifier. This addresses a change to the Python
+    grammar in version 3.13.4 that made such a line break a syntax error.
+
+- **`rust-toolchain.toml` is no longer included in source distributions**
+
+    The `rust-toolchain.toml` is used to specify a higher Rust version than Ruff's
+    minimum supported Rust version (MSRV) for development and building release
+    artifacts. However, when present in source distributions, it would also cause
+    downstream package maintainers to pull in the same Rust toolchain, even if
+    their available toolchain was MSRV-compatible.
+
+### Removed Rules
+
+The following rules have been removed:
+
+- [`suspicious-xmle-tree-usage`](https://docs.astral.sh/ruff/rules/suspicious-xmle-tree-usage/)
+    (`S320`)
+
+### Deprecated Rules
+
+The following rules have been deprecated:
+
+- [`pandas-df-variable-name`](https://docs.astral.sh/ruff/rules/pandas-df-variable-name/)
+
+### Stabilization
+
+The following rules have been stabilized and are no longer in preview:
+
+- [`for-loop-writes`](https://docs.astral.sh/ruff/rules/for-loop-writes) (`FURB122`)
+- [`check-and-remove-from-set`](https://docs.astral.sh/ruff/rules/check-and-remove-from-set) (`FURB132`)
+- [`verbose-decimal-constructor`](https://docs.astral.sh/ruff/rules/verbose-decimal-constructor) (`FURB157`)
+- [`fromisoformat-replace-z`](https://docs.astral.sh/ruff/rules/fromisoformat-replace-z) (`FURB162`)
+- [`int-on-sliced-str`](https://docs.astral.sh/ruff/rules/int-on-sliced-str) (`FURB166`)
+- [`exc-info-outside-except-handler`](https://docs.astral.sh/ruff/rules/exc-info-outside-except-handler) (`LOG014`)
+- [`import-outside-top-level`](https://docs.astral.sh/ruff/rules/import-outside-top-level) (`PLC0415`)
+- [`unnecessary-dict-index-lookup`](https://docs.astral.sh/ruff/rules/unnecessary-dict-index-lookup) (`PLR1733`)
+- [`nan-comparison`](https://docs.astral.sh/ruff/rules/nan-comparison) (`PLW0177`)
+- [`eq-without-hash`](https://docs.astral.sh/ruff/rules/eq-without-hash) (`PLW1641`)
+- [`pytest-parameter-with-default-argument`](https://docs.astral.sh/ruff/rules/pytest-parameter-with-default-argument) (`PT028`)
+- [`pytest-warns-too-broad`](https://docs.astral.sh/ruff/rules/pytest-warns-too-broad) (`PT030`)
+- [`pytest-warns-with-multiple-statements`](https://docs.astral.sh/ruff/rules/pytest-warns-with-multiple-statements) (`PT031`)
+- [`invalid-formatter-suppression-comment`](https://docs.astral.sh/ruff/rules/invalid-formatter-suppression-comment) (`RUF028`)
+- [`dataclass-enum`](https://docs.astral.sh/ruff/rules/dataclass-enum) (`RUF049`)
+- [`class-with-mixed-type-vars`](https://docs.astral.sh/ruff/rules/class-with-mixed-type-vars) (`RUF053`)
+- [`unnecessary-round`](https://docs.astral.sh/ruff/rules/unnecessary-round) (`RUF057`)
+- [`starmap-zip`](https://docs.astral.sh/ruff/rules/starmap-zip) (`RUF058`)
+- [`non-pep604-annotation-optional`](https://docs.astral.sh/ruff/rules/non-pep604-annotation-optional) (`UP045`)
+- [`non-pep695-generic-class`](https://docs.astral.sh/ruff/rules/non-pep695-generic-class) (`UP046`)
+- [`non-pep695-generic-function`](https://docs.astral.sh/ruff/rules/non-pep695-generic-function) (`UP047`)
+- [`private-type-parameter`](https://docs.astral.sh/ruff/rules/private-type-parameter) (`UP049`)
+
+The following behaviors have been stabilized:
+
+- [`collection-literal-concatenation`] (`RUF005`) now recognizes slices, in
+    addition to list literals and variables.
+- The fix for [`readlines-in-for`] (`FURB129`) is now marked as always safe.
+- [`if-else-block-instead-of-if-exp`] (`SIM108`) will now further simplify
+    expressions to use `or` instead of an `if` expression, where possible.
+- [`unused-noqa`] (`RUF100`) now checks for file-level `noqa` comments as well
+    as inline comments.
+- [`subprocess-without-shell-equals-true`] (`S603`) now accepts literal strings,
+    as well as lists and tuples of literal strings, as trusted input.
+- [`boolean-type-hint-positional-argument`] (`FBT001`) now applies to types that
+    include `bool`, like `bool | int` or `typing.Optional[bool]`, in addition to
+    plain `bool` annotations.
+- [`non-pep604-annotation-union`] (`UP007`) has now been split into two rules.
+    `UP007` now applies only to `typing.Union`, while
+    [`non-pep604-annotation-optional`] (`UP045`) checks for use of
+    `typing.Optional`. `UP045` has also been stabilized in this release, but you
+    may need to update existing `include`, `ignore`, or `noqa` settings to
+    accommodate this change.
+
+### Preview features
+
+- \[`ruff`\] Check for non-context-manager use of `pytest.raises`, `pytest.warns`, and `pytest.deprecated_call` (`RUF061`) ([#17368](https://github.com/astral-sh/ruff/pull/17368))
+- [syntax-errors] Raise unsupported syntax error for template strings prior to Python 3.14 ([#18664](https://github.com/astral-sh/ruff/pull/18664))
+
+### Bug fixes
+
+- Add syntax error when conversion flag does not immediately follow exclamation mark ([#18706](https://github.com/astral-sh/ruff/pull/18706))
+- Add trailing space around `readlines` ([#18542](https://github.com/astral-sh/ruff/pull/18542))
+- Fix `\r` and `\r\n` handling in t- and f-string debug texts ([#18673](https://github.com/astral-sh/ruff/pull/18673))
+- Hug closing `}` when f-string expression has a format specifier ([#18704](https://github.com/astral-sh/ruff/pull/18704))
+- \[`flake8-pyi`\] Avoid syntax error in the case of starred and keyword arguments (`PYI059`) ([#18611](https://github.com/astral-sh/ruff/pull/18611))
+- \[`flake8-return`\] Fix `RET504` autofix generating a syntax error ([#18428](https://github.com/astral-sh/ruff/pull/18428))
+- \[`pep8-naming`\] Suppress fix for `N804` and `N805` if the recommended name is already used ([#18472](https://github.com/astral-sh/ruff/pull/18472))
+- \[`pycodestyle`\] Avoid causing a syntax error in expressions spanning multiple lines (`E731`) ([#18479](https://github.com/astral-sh/ruff/pull/18479))
+- \[`pyupgrade`\] Suppress `UP008` if `super` is shadowed ([#18688](https://github.com/astral-sh/ruff/pull/18688))
+- \[`refurb`\] Parenthesize lambda and ternary expressions (`FURB122`, `FURB142`) ([#18592](https://github.com/astral-sh/ruff/pull/18592))
+- \[`ruff`\] Handle extra arguments to `deque` (`RUF037`) ([#18614](https://github.com/astral-sh/ruff/pull/18614))
+- \[`ruff`\] Preserve parentheses around `deque` in fix for `unnecessary-empty-iterable-within-deque-call` (`RUF037`) ([#18598](https://github.com/astral-sh/ruff/pull/18598))
+- \[`ruff`\] Validate arguments before offering a fix (`RUF056`) ([#18631](https://github.com/astral-sh/ruff/pull/18631))
+- \[`ruff`\] Skip fix for `RUF059` if dummy name is already bound ([#18509](https://github.com/astral-sh/ruff/pull/18509))
+- \[`pylint`\] Fix `PLW0128` to check assignment targets in square brackets and after asterisks ([#18665](https://github.com/astral-sh/ruff/pull/18665))
+
+### Rule changes
+
+- Fix false positive on mutations in `return` statements (`B909`) ([#18408](https://github.com/astral-sh/ruff/pull/18408))
+- Treat `ty:` comments as pragma comments ([#18532](https://github.com/astral-sh/ruff/pull/18532))
+- \[`flake8-pyi`\] Apply `custom-typevar-for-self` to string annotations (`PYI019`) ([#18311](https://github.com/astral-sh/ruff/pull/18311))
+- \[`pyupgrade`\] Don't offer a fix for `Optional[None]` (`UP007`, `UP045)` ([#18545](https://github.com/astral-sh/ruff/pull/18545))
+- \[`pyupgrade`\] Fix `super(__class__, self)` detection (`UP008`) ([#18478](https://github.com/astral-sh/ruff/pull/18478))
+- \[`refurb`\] Make the fix for `FURB163` unsafe for `log2`, `log10`, `*args`, and deleted comments ([#18645](https://github.com/astral-sh/ruff/pull/18645))
+
+### Server
+
+- Support cancellation requests ([#18627](https://github.com/astral-sh/ruff/pull/18627))
+
+### Documentation
+
+- Drop confusing second `*` from glob pattern example for `per-file-target-version` ([#18709](https://github.com/astral-sh/ruff/pull/18709))
+- Update Neovim configuration examples ([#18491](https://github.com/astral-sh/ruff/pull/18491))
+- \[`pylint`\] De-emphasize `__hash__ = Parent.__hash__` (`PLW1641`) ([#18613](https://github.com/astral-sh/ruff/pull/18613))
+- \[`refurb`\] Add a note about float literal handling (`FURB157`) ([#18615](https://github.com/astral-sh/ruff/pull/18615))
+
+## 0.11.13
+
+### Preview features
+
+- \[`airflow`\] Add unsafe fix for module moved cases (`AIR301`,`AIR311`,`AIR312`,`AIR302`) ([#18367](https://github.com/astral-sh/ruff/pull/18367),[#18366](https://github.com/astral-sh/ruff/pull/18366),[#18363](https://github.com/astral-sh/ruff/pull/18363),[#18093](https://github.com/astral-sh/ruff/pull/18093))
+- \[`refurb`\] Add coverage of `set` and `frozenset` calls (`FURB171`) ([#18035](https://github.com/astral-sh/ruff/pull/18035))
+- \[`refurb`\] Mark `FURB180` fix unsafe when class has bases ([#18149](https://github.com/astral-sh/ruff/pull/18149))
+
+### Bug fixes
+
+- \[`perflint`\] Fix missing parentheses for lambda and ternary conditions (`PERF401`, `PERF403`) ([#18412](https://github.com/astral-sh/ruff/pull/18412))
+- \[`pyupgrade`\] Apply `UP035` only on py313+ for `get_type_hints()` ([#18476](https://github.com/astral-sh/ruff/pull/18476))
+- \[`pyupgrade`\] Make fix unsafe if it deletes comments (`UP004`,`UP050`) ([#18393](https://github.com/astral-sh/ruff/pull/18393), [#18390](https://github.com/astral-sh/ruff/pull/18390))
+
+### Rule changes
+
+- \[`fastapi`\] Avoid false positive for class dependencies (`FAST003`) ([#18271](https://github.com/astral-sh/ruff/pull/18271))
+
+### Documentation
+
+- Update editor setup docs for Neovim and Vim ([#18324](https://github.com/astral-sh/ruff/pull/18324))
+
+### Other changes
+
+- Support Python 3.14 template strings (t-strings) in formatter and parser ([#17851](https://github.com/astral-sh/ruff/pull/17851))
+
+## 0.11.12
+
+### Preview features
+
+- \[`airflow`\] Revise fix titles (`AIR3`) ([#18215](https://github.com/astral-sh/ruff/pull/18215))
+- \[`pylint`\] Implement `missing-maxsplit-arg` (`PLC0207`) ([#17454](https://github.com/astral-sh/ruff/pull/17454))
+- \[`pyupgrade`\] New rule `UP050` (`useless-class-metaclass-type`) ([#18334](https://github.com/astral-sh/ruff/pull/18334))
+- \[`flake8-use-pathlib`\] Replace `os.symlink` with `Path.symlink_to` (`PTH211`) ([#18337](https://github.com/astral-sh/ruff/pull/18337))
+
+### Bug fixes
+
+- \[`flake8-bugbear`\] Ignore `__debug__` attribute in `B010` ([#18357](https://github.com/astral-sh/ruff/pull/18357))
+- \[`flake8-async`\] Fix `anyio.sleep` argument name (`ASYNC115`, `ASYNC116`) ([#18262](https://github.com/astral-sh/ruff/pull/18262))
+- \[`refurb`\] Fix `FURB129` autofix generating invalid syntax ([#18235](https://github.com/astral-sh/ruff/pull/18235))
+
+### Rule changes
+
+- \[`flake8-implicit-str-concat`\] Add autofix for `ISC003` ([#18256](https://github.com/astral-sh/ruff/pull/18256))
+- \[`pycodestyle`\] Improve the diagnostic message for `E712` ([#18328](https://github.com/astral-sh/ruff/pull/18328))
+- \[`flake8-2020`\] Fix diagnostic message for `!=` comparisons (`YTT201`) ([#18293](https://github.com/astral-sh/ruff/pull/18293))
+- \[`pyupgrade`\] Make fix unsafe if it deletes comments (`UP010`) ([#18291](https://github.com/astral-sh/ruff/pull/18291))
+
+### Documentation
+
+- Simplify rules table to improve readability ([#18297](https://github.com/astral-sh/ruff/pull/18297))
+- Update editor integrations link in README ([#17977](https://github.com/astral-sh/ruff/pull/17977))
+- \[`flake8-bugbear`\] Add fix safety section (`B006`) ([#17652](https://github.com/astral-sh/ruff/pull/17652))
+
+## 0.11.11
+
+### Preview features
+
+- \[`airflow`\] Add autofixes for `AIR302` and `AIR312` ([#17942](https://github.com/astral-sh/ruff/pull/17942))
+- \[`airflow`\] Move rules from `AIR312` to `AIR302` ([#17940](https://github.com/astral-sh/ruff/pull/17940))
+- \[`airflow`\] Update `AIR301` and `AIR311` with the latest Airflow implementations ([#17985](https://github.com/astral-sh/ruff/pull/17985))
+- \[`flake8-simplify`\] Enable fix in preview mode (`SIM117`) ([#18208](https://github.com/astral-sh/ruff/pull/18208))
+
+### Bug fixes
+
+- Fix inconsistent formatting of match-case on `[]` and `_` ([#18147](https://github.com/astral-sh/ruff/pull/18147))
+- \[`pylint`\] Fix `PLW1514` not recognizing the `encoding` positional argument of `codecs.open` ([#18109](https://github.com/astral-sh/ruff/pull/18109))
+
+### CLI
+
+- Add full option name in formatter warning ([#18217](https://github.com/astral-sh/ruff/pull/18217))
+
+### Documentation
+
+- Fix rendering of admonition in docs ([#18163](https://github.com/astral-sh/ruff/pull/18163))
+- \[`flake8-print`\] Improve print/pprint docs for `T201` and `T203` ([#18130](https://github.com/astral-sh/ruff/pull/18130))
+- \[`flake8-simplify`\] Add fix safety section (`SIM110`,`SIM210`) ([#18114](https://github.com/astral-sh/ruff/pull/18114),[#18100](https://github.com/astral-sh/ruff/pull/18100))
+- \[`pylint`\] Fix docs example that produced different output (`PLW0603`) ([#18216](https://github.com/astral-sh/ruff/pull/18216))
+
 ## 0.11.10
 
 ### Preview features
@@ -151,7 +370,7 @@
 - \[`airflow`\] Add missing `AIR302` attribute check ([#17115](https://github.com/astral-sh/ruff/pull/17115))
 - \[`airflow`\] Expand module path check to individual symbols (`AIR302`) ([#17278](https://github.com/astral-sh/ruff/pull/17278))
 - \[`airflow`\] Extract `AIR312` from `AIR302` rules (`AIR302`, `AIR312`) ([#17152](https://github.com/astral-sh/ruff/pull/17152))
-- \[`airflow`\] Update oudated `AIR301`, `AIR302` rules ([#17123](https://github.com/astral-sh/ruff/pull/17123))
+- \[`airflow`\] Update outdated `AIR301`, `AIR302` rules ([#17123](https://github.com/astral-sh/ruff/pull/17123))
 - [syntax-errors] Async comprehension in sync comprehension ([#17177](https://github.com/astral-sh/ruff/pull/17177))
 - [syntax-errors] Check annotations in annotated assignments ([#17283](https://github.com/astral-sh/ruff/pull/17283))
 - [syntax-errors] Extend annotation checks to `await` ([#17282](https://github.com/astral-sh/ruff/pull/17282))
@@ -312,7 +531,7 @@ See also, the "Remapped rules" section which may result in disabled rules.
 
 - **More robust noqa parsing** ([#16483](https://github.com/astral-sh/ruff/pull/16483))
 
-    The syntax for both file-level and in-line suppression comments has been unified and made more robust to certain errors. In most cases, this will result in more suppression comments being read by Ruff, but there are a few instances where previously read comments will now log an error to the user instead. Please refer to the documentation on [*Error suppression*](https://docs.astral.sh/ruff/linter/#error-suppression) for the full specification.
+    The syntax for both file-level and in-line suppression comments has been unified and made more robust to certain errors. In most cases, this will result in more suppression comments being read by Ruff, but there are a few instances where previously read comments will now log an error to the user instead. Please refer to the documentation on [_Error suppression_](https://docs.astral.sh/ruff/linter/#error-suppression) for the full specification.
 
 - **Avoid unnecessary parentheses around with statements with a single context manager and a trailing comment** ([#14005](https://github.com/astral-sh/ruff/pull/14005))
 
@@ -1234,7 +1453,7 @@ The following fixes have been stabilized:
 - Detect items that hash to same value in duplicate sets (`B033`, `PLC0208`) ([#14064](https://github.com/astral-sh/ruff/pull/14064))
 - \[`eradicate`\] Better detection of IntelliJ language injection comments (`ERA001`) ([#14094](https://github.com/astral-sh/ruff/pull/14094))
 - \[`flake8-pyi`\] Add autofix for `docstring-in-stub` (`PYI021`) ([#14150](https://github.com/astral-sh/ruff/pull/14150))
-- \[`flake8-pyi`\] Update `duplicate-literal-member` (`PYI062`) to alawys provide an autofix ([#14188](https://github.com/astral-sh/ruff/pull/14188))
+- \[`flake8-pyi`\] Update `duplicate-literal-member` (`PYI062`) to always provide an autofix ([#14188](https://github.com/astral-sh/ruff/pull/14188))
 - \[`pyflakes`\] Detect items that hash to same value in duplicate dictionaries (`F601`) ([#14065](https://github.com/astral-sh/ruff/pull/14065))
 - \[`ruff`\] Fix false positive for decorators (`RUF028`) ([#14061](https://github.com/astral-sh/ruff/pull/14061))
 
@@ -1724,7 +1943,7 @@ The following fixes have been stabilized:
 
 ## 0.5.6
 
-Ruff 0.5.6 automatically enables linting and formatting of notebooks in *preview mode*.
+Ruff 0.5.6 automatically enables linting and formatting of notebooks in _preview mode_.
 You can opt-out of this behavior by adding `*.ipynb` to the `extend-exclude` setting.
 
 ```toml
@@ -2477,7 +2696,7 @@ To setup `ruff server` with your editor, refer to the [README.md](https://github
 
 ### Server
 
-*This section is devoted to updates for our new language server, written in Rust.*
+_This section is devoted to updates for our new language server, written in Rust._
 
 - Enable ruff-specific source actions ([#10916](https://github.com/astral-sh/ruff/pull/10916))
 - Refreshes diagnostics for open files when file configuration is changed ([#10988](https://github.com/astral-sh/ruff/pull/10988))
@@ -3884,7 +4103,7 @@ Read Ruff's new [versioning policy](https://docs.astral.sh/ruff/versioning/).
 - \[`refurb`\] Add `single-item-membership-test` (`FURB171`) ([#7815](https://github.com/astral-sh/ruff/pull/7815))
 - \[`pylint`\] Add `and-or-ternary` (`R1706`) ([#7811](https://github.com/astral-sh/ruff/pull/7811))
 
-*New rules are added in [preview](https://docs.astral.sh/ruff/preview/).*
+_New rules are added in [preview](https://docs.astral.sh/ruff/preview/)._
 
 ### Configuration
 
@@ -3959,3 +4178,12 @@ Read Ruff's new [versioning policy](https://docs.astral.sh/ruff/versioning/).
 ### Playground
 
 - Fix playground `Quick Fix` action ([#7824](https://github.com/astral-sh/ruff/pull/7824))
+
+[`boolean-type-hint-positional-argument`]: https://docs.astral.sh/ruff/rules/boolean-type-hint-positional-argument
+[`collection-literal-concatenation`]: https://docs.astral.sh/ruff/rules/collection-literal-concatenation
+[`if-else-block-instead-of-if-exp`]: https://docs.astral.sh/ruff/rules/if-else-block-instead-of-if-exp
+[`non-pep604-annotation-optional`]: https://docs.astral.sh/ruff/rules/non-pep604-annotation-optional
+[`non-pep604-annotation-union`]: https://docs.astral.sh/ruff/rules/non-pep604-annotation-union
+[`readlines-in-for`]: https://docs.astral.sh/ruff/rules/readlines-in-for
+[`subprocess-without-shell-equals-true`]: https://docs.astral.sh/ruff/rules/subprocess-without-shell-equals-true
+[`unused-noqa`]: https://docs.astral.sh/ruff/rules/unused-noqa

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "adler2"
@@ -51,14 +51,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "710e8eae58854cdc1790fcb56cca04d712a17be849eeb81da2a724bf4bae2bc4"
 dependencies = [
  "anstyle",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
 ]
 
 [[package]]
 name = "anstream"
-version = "0.6.18"
+version = "0.6.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8acc5369981196006228e28809f761875c0327210a891e941f4c683b3a99529b"
+checksum = "301af1932e46185686725e0fad2f8f2aa7da69dd70bf6ecc44d6b703844a3933"
 dependencies = [
  "anstyle",
  "anstyle-parse",
@@ -71,9 +71,9 @@ dependencies = [
 
 [[package]]
 name = "anstyle"
-version = "1.0.10"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
+checksum = "862ed96ca487e809f1c8e5a8447f6ee2cf102f846893800b20cebdf541fc6bbd"
 
 [[package]]
 name = "anstyle-lossy"
@@ -112,7 +112,7 @@ dependencies = [
  "anstyle",
  "anstyle-lossy",
  "html-escape",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
 ]
 
 [[package]]
@@ -132,6 +132,12 @@ version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
 
+[[package]]
+name = "arc-swap"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69f7f8c3906b62b754cd5326047894316021dcfe5a194c8ea52bdd94934a3457"
+
 [[package]]
 name = "argfile"
 version = "0.2.1"
@@ -218,9 +224,9 @@ dependencies = [
 
 [[package]]
 name = "boxcar"
-version = "0.2.12"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66bb12751a83493ef4b8da1120451a262554e216a247f14b48cb5e8fe7ed8bdf"
+checksum = "26c4925bc979b677330a8c7fe7a8c94af2dbb4a2d37b4a20a80d884400f46baa"
 
 [[package]]
 name = "bstr"
@@ -256,9 +262,9 @@ dependencies = [
 
 [[package]]
 name = "camino"
-version = "1.1.9"
+version = "1.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b96ec4966b5813e2c0507c1f86115c8c5abaadc3980879c3424042a02fd1ad3"
+checksum = "0da45bc31171d8d6960122e222a67740df867c1dd53b4d51caa297084c185cab"
 dependencies = [
  "serde",
 ]
@@ -342,9 +348,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.38"
+version = "4.5.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed93b9805f8ba930df42c2590f05453d5ec36cbb85d018868a5b24d31f6ac000"
+checksum = "40b6887a1d8685cebccf115538db5c0efe625ccac9696ad45c409d96566e910f"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -352,9 +358,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.38"
+version = "4.5.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "379026ff283facf611b0ea629334361c4211d1b12ee01024eec1591133b04120"
+checksum = "e0c66c08ce9f0c698cbce5c0279d0bb6ac936d8674174fe48f736533b964f59e"
 dependencies = [
  "anstream",
  "anstyle",
@@ -395,9 +401,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.32"
+version = "4.5.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09176aae279615badda0765c0c0b3f6ed53f4709118af73cf4655d85d1530cd7"
+checksum = "d2c7947ae4cc3d851207c1adb5b5e260ff0cca11446b1d6d1423788e442257ce"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -522,7 +528,7 @@ dependencies = [
  "encode_unicode",
  "libc",
  "once_cell",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "windows-sys 0.59.0",
 ]
 
@@ -1109,9 +1115,9 @@ checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
 
 [[package]]
 name = "hashbrown"
-version = "0.15.3"
+version = "0.15.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84b26c544d002229e640969970a2e74021aadf6e2f96372b9c58eff97de08eb3"
+checksum = "5971ac85611da7067dbfcabef3c70ebb5606018acd9e2a3903a0da507521e0d5"
 dependencies = [
  "allocator-api2",
  "equivalent",
@@ -1124,7 +1130,7 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7382cf6263419f2d8df38c55d7da83da5c18aef87fc7a7fc1fb1e344edfe14c1"
 dependencies = [
- "hashbrown 0.15.3",
+ "hashbrown 0.15.4",
 ]
 
 [[package]]
@@ -1322,7 +1328,7 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17d34b7d42178945f775e84bc4c36dde7c1c6cdfea656d3354d009056f2bb3d2"
 dependencies = [
- "hashbrown 0.15.3",
+ "hashbrown 0.15.4",
 ]
 
 [[package]]
@@ -1342,7 +1348,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
 dependencies = [
  "equivalent",
- "hashbrown 0.15.3",
+ "hashbrown 0.15.4",
  "serde",
 ]
 
@@ -1355,7 +1361,7 @@ dependencies = [
  "console",
  "number_prefix",
  "portable-atomic",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "vt100",
  "web-time",
 ]
@@ -1415,6 +1421,15 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "intrusive-collections"
+version = "0.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "189d0897e4cbe8c75efedf3502c18c887b05046e59d28404d4d8e46cbc4d1e86"
+dependencies = [
+ "memoffset",
+]
+
 [[package]]
 name = "is-docker"
 version = "0.2.0"
@@ -1498,9 +1513,9 @@ checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
 [[package]]
 name = "jiff"
-version = "0.2.13"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f02000660d30638906021176af16b17498bd0d12813dbfe7b276d8bc7f3c0806"
+checksum = "be1f93b8b1eb69c77f24bbb0afdf66f54b632ee39af40ca21c4365a1d7347e49"
 dependencies = [
  "jiff-static",
  "jiff-tzdb-platform",
@@ -1513,9 +1528,9 @@ dependencies = [
 
 [[package]]
 name = "jiff-static"
-version = "0.2.13"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3c30758ddd7188629c6713fc45d1188af4f44c90582311d0c8d8c9907f60c48"
+checksum = "03343451ff899767262ec32146f6d559dd759fdadf42ff0e227c7c48f72594b4"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1591,15 +1606,15 @@ checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
 name = "libc"
-version = "0.2.172"
+version = "0.2.173"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d750af042f7ef4f724306de029d18836c26c1765a54a6a3f094cbd23a7267ffa"
+checksum = "d8cfeafaffdbc32176b64fb251369d52ea9f0a8fbc6f8759edffef7b525d64bb"
 
 [[package]]
 name = "libcst"
-version = "1.7.0"
+version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad9e315e3f679e61b9095ffd5e509de78b8a4ea3bba9d772f6fb243209f808d4"
+checksum = "ae28ddc5b90c3e3146a21d051ca095cbc8d932ad8714cf65ddf71a9abb35684c"
 dependencies = [
  "annotate-snippets",
  "libcst_derive",
@@ -1607,14 +1622,14 @@ dependencies = [
  "paste",
  "peg",
  "regex",
- "thiserror 1.0.69",
+ "thiserror 2.0.12",
 ]
 
 [[package]]
 name = "libcst_derive"
-version = "1.7.0"
+version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa96ed35d0dccc67cf7ba49350cb86de3dcb1d072a7ab28f99117f19d874953"
+checksum = "dc2de5c2f62bcf8a4f7290b1854388b262c4b68f1db1a3ee3ef6d4c1319b00a3"
 dependencies = [
  "quote",
  "syn",
@@ -1738,9 +1753,18 @@ checksum = "2f926ade0c4e170215ae43342bf13b9310a437609c81f29f86c5df6657582ef9"
 
 [[package]]
 name = "memchr"
-version = "2.7.4"
+version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
+
+[[package]]
+name = "memoffset"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
+dependencies = [
+ "autocfg",
+]
 
 [[package]]
 name = "mimalloc"
@@ -1928,6 +1952,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d31b8b7a99f71bdff4235faf9ce9eada0ad3562c8fbeb7d607d9f41a6ec569d"
 dependencies = [
  "indexmap",
+ "serde",
 ]
 
 [[package]]
@@ -2049,7 +2074,7 @@ checksum = "31095ca1f396e3de32745f42b20deef7bc09077f918b085307e8eab6ddd8fb9c"
 dependencies = [
  "once_cell",
  "serde",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "unscanny",
  "version-ranges",
 ]
@@ -2070,7 +2095,7 @@ dependencies = [
  "serde",
  "smallvec",
  "thiserror 1.0.69",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "url",
  "urlencoding",
  "version-ranges",
@@ -2258,15 +2283,15 @@ dependencies = [
 
 [[package]]
 name = "pyproject-toml"
-version = "0.13.4"
+version = "0.13.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "643af57c3f36ba90a8b53e972727d8092f7408a9ebfbaf4c3d2c17b07c58d835"
+checksum = "7b0f6160dc48298b9260d9b958ad1d7f96f6cd0b9df200b22329204e09334663"
 dependencies = [
  "indexmap",
  "pep440_rs",
  "pep508_rs",
  "serde",
- "thiserror 1.0.69",
+ "thiserror 2.0.12",
  "toml",
 ]
 
@@ -2485,7 +2510,7 @@ dependencies = [
 
 [[package]]
 name = "ruff"
-version = "0.11.10"
+version = "0.12.0"
 dependencies = [
  "anyhow",
  "argfile",
@@ -2554,7 +2579,7 @@ dependencies = [
  "snapbox",
  "toml",
  "tryfn",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
 ]
 
 [[package]]
@@ -2594,6 +2619,7 @@ name = "ruff_db"
 version = "0.0.0"
 dependencies = [
  "anstyle",
+ "arc-swap",
  "camino",
  "countme",
  "dashmap 6.1.0",
@@ -2642,7 +2668,6 @@ dependencies = [
  "rayon",
  "regex",
  "ruff",
- "ruff_diagnostics",
  "ruff_formatter",
  "ruff_linter",
  "ruff_notebook",
@@ -2672,9 +2697,7 @@ dependencies = [
 name = "ruff_diagnostics"
 version = "0.0.0"
 dependencies = [
- "anyhow",
  "is-macro",
- "log",
  "ruff_text_size",
  "serde",
 ]
@@ -2692,7 +2715,7 @@ dependencies = [
  "serde",
  "static_assertions",
  "tracing",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
 ]
 
 [[package]]
@@ -2725,7 +2748,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_linter"
-version = "0.11.10"
+version = "0.12.0"
 dependencies = [
  "aho-corasick",
  "anyhow",
@@ -2781,7 +2804,7 @@ dependencies = [
  "toml",
  "typed-arena",
  "unicode-normalization",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "unicode_names2",
  "url",
 ]
@@ -2842,6 +2865,7 @@ dependencies = [
  "salsa",
  "schemars",
  "serde",
+ "thiserror 2.0.12",
 ]
 
 [[package]]
@@ -3061,7 +3085,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_wasm"
-version = "0.11.10"
+version = "0.12.0"
 dependencies = [
  "console_error_panic_hook",
  "console_log",
@@ -3081,6 +3105,7 @@ dependencies = [
  "ruff_workspace",
  "serde",
  "serde-wasm-bindgen",
+ "uuid",
  "wasm-bindgen",
  "wasm-bindgen-test",
 ]
@@ -3179,16 +3204,17 @@ checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
 
 [[package]]
 name = "salsa"
-version = "0.21.1"
-source = "git+https://github.com/salsa-rs/salsa.git?rev=7edce6e248f35c8114b4b021cdb474a3fb2813b3#7edce6e248f35c8114b4b021cdb474a3fb2813b3"
+version = "0.22.0"
+source = "git+https://github.com/salsa-rs/salsa.git?rev=09627e450566f894956710a3fd923dc80462ae6d#09627e450566f894956710a3fd923dc80462ae6d"
 dependencies = [
  "boxcar",
  "compact_str",
  "crossbeam-queue",
- "dashmap 6.1.0",
- "hashbrown 0.15.3",
+ "crossbeam-utils",
+ "hashbrown 0.15.4",
  "hashlink",
  "indexmap",
+ "intrusive-collections",
  "parking_lot",
  "portable-atomic",
  "rayon",
@@ -3202,15 +3228,14 @@ dependencies = [
 
 [[package]]
 name = "salsa-macro-rules"
-version = "0.21.1"
-source = "git+https://github.com/salsa-rs/salsa.git?rev=7edce6e248f35c8114b4b021cdb474a3fb2813b3#7edce6e248f35c8114b4b021cdb474a3fb2813b3"
+version = "0.22.0"
+source = "git+https://github.com/salsa-rs/salsa.git?rev=09627e450566f894956710a3fd923dc80462ae6d#09627e450566f894956710a3fd923dc80462ae6d"
 
 [[package]]
 name = "salsa-macros"
-version = "0.21.1"
-source = "git+https://github.com/salsa-rs/salsa.git?rev=7edce6e248f35c8114b4b021cdb474a3fb2813b3#7edce6e248f35c8114b4b021cdb474a3fb2813b3"
+version = "0.22.0"
+source = "git+https://github.com/salsa-rs/salsa.git?rev=09627e450566f894956710a3fd923dc80462ae6d#09627e450566f894956710a3fd923dc80462ae6d"
 dependencies = [
- "heck",
  "proc-macro2",
  "quote",
  "syn",
@@ -3329,9 +3354,9 @@ dependencies = [
 
 [[package]]
 name = "serde_spanned"
-version = "0.6.8"
+version = "0.6.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87607cb1398ed59d48732e575a4c28a7a8ebf2454b964fe3f224f2afc07909e1"
+checksum = "bf41e0cfaf7226dca15e8197172c295a782857fcb97fad1808a166870dee75a3"
 dependencies = [
  "serde",
 ]
@@ -3417,9 +3442,9 @@ checksum = "56199f7ddabf13fe5074ce809e7d3f42b42ae711800501b5b16ea82ad029c39d"
 
 [[package]]
 name = "smallvec"
-version = "1.15.0"
+version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8917285742e9f3e1683f0a9c4e6b57960b7314d0b08d30d1ecd426713ee2eee9"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
 [[package]]
 name = "snapbox"
@@ -3501,9 +3526,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.101"
+version = "2.0.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf"
+checksum = "e4307e30089d6fd6aff212f2da3a1f9e32f3223b1f010fb09b7c95f90f3ca1e8"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3726,9 +3751,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "toml"
-version = "0.8.22"
+version = "0.8.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05ae329d1f08c4d17a59bed7ff5b5a769d062e64a62d34a3261b219e62cd5aae"
+checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
 dependencies = [
  "serde",
  "serde_spanned",
@@ -3738,18 +3763,18 @@ dependencies = [
 
 [[package]]
 name = "toml_datetime"
-version = "0.6.9"
+version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3da5db5a963e24bc68be8b17b6fa82814bb22ee8660f192bb182771d498f09a3"
+checksum = "22cddaf88f4fbc13c51aebbf5f8eceb5c7c5a9da2ac40a13519eb5b0a0e8f11c"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "toml_edit"
-version = "0.22.26"
+version = "0.22.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "310068873db2c5b3e7659d2cc35d21855dbafa50d1ce336397c666e3cb08137e"
+checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
 dependencies = [
  "indexmap",
  "serde",
@@ -3761,9 +3786,9 @@ dependencies = [
 
 [[package]]
 name = "toml_write"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfb942dfe1d8e29a7ee7fcbde5bd2b9a25fb89aa70caea2eba3bee836ff41076"
+checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
 
 [[package]]
 name = "tracing"
@@ -3874,6 +3899,7 @@ dependencies = [
  "countme",
  "crossbeam",
  "ctrlc",
+ "dunce",
  "filetime",
  "indicatif",
  "insta",
@@ -3918,12 +3944,17 @@ name = "ty_project"
 version = "0.0.0"
 dependencies = [
  "anyhow",
+ "camino",
+ "colored 3.0.0",
  "crossbeam",
- "glob",
+ "globset",
  "insta",
  "notify",
+ "ordermap",
  "pep440_rs",
  "rayon",
+ "regex",
+ "regex-automata 0.4.9",
  "ruff_cache",
  "ruff_db",
  "ruff_macros",
@@ -3950,11 +3981,13 @@ dependencies = [
  "anyhow",
  "bitflags 2.9.1",
  "camino",
+ "colored 3.0.0",
  "compact_str",
  "countme",
  "dir-test",
  "drop_bomb",
- "hashbrown 0.15.3",
+ "glob",
+ "hashbrown 0.15.4",
  "indexmap",
  "insta",
  "itertools 0.14.0",
@@ -3962,6 +3995,7 @@ dependencies = [
  "ordermap",
  "quickcheck",
  "quickcheck_macros",
+ "ruff_annotate_snippets",
  "ruff_db",
  "ruff_index",
  "ruff_macros",
@@ -3984,6 +4018,7 @@ dependencies = [
  "test-case",
  "thiserror 2.0.12",
  "tracing",
+ "ty_python_semantic",
  "ty_test",
  "ty_vendored",
 ]
@@ -4003,6 +4038,7 @@ dependencies = [
  "ruff_source_file",
  "ruff_text_size",
  "rustc-hash 2.1.1",
+ "salsa",
  "serde",
  "serde_json",
  "shellexpand",
@@ -4018,6 +4054,7 @@ name = "ty_test"
 version = "0.0.0"
 dependencies = [
  "anyhow",
+ "bitflags 2.9.1",
  "camino",
  "colored 3.0.0",
  "insta",
@@ -4071,6 +4108,7 @@ dependencies = [
  "ty_ide",
  "ty_project",
  "ty_python_semantic",
+ "uuid",
  "wasm-bindgen",
  "wasm-bindgen-test",
 ]
@@ -4164,9 +4202,9 @@ checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
 
 [[package]]
 name = "unicode-width"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fc81956842c57dac11422a97c3b8195a1ff727f06e85c84ed2e8aa277c9a0fd"
+checksum = "4a1a07cc7db3810833284e8d372ccdc6da29741639ecc70c9ec107df0fa6154c"
 
 [[package]]
 name = "unicode_names2"
@@ -4240,9 +4278,9 @@ checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
 [[package]]
 name = "uuid"
-version = "1.16.0"
+version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "458f7a779bf54acc9f347480ac654f68407d3aab21269a6e3c9f922acd9e2da9"
+checksum = "3cf4199d1e5d15ddd86a694e4d0dffa9c323ce759fea589f00fef9d81cc1931d"
 dependencies = [
  "getrandom 0.3.3",
  "js-sys",
@@ -4253,9 +4291,9 @@ dependencies = [
 
 [[package]]
 name = "uuid-macro-internal"
-version = "1.16.0"
+version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72dcd78c4f979627a754f5522cea6e6a25e55139056535fe6e69c506cd64a862"
+checksum = "26b682e8c381995ea03130e381928e0e005b7c9eb483c6c8682f50e07b33c2b7"
 dependencies = [
  "proc-macro2",
  "quote",

Cargo.toml

@@ -51,6 +51,7 @@ aho-corasick = { version = "1.1.3" }
 anstream = { version = "0.6.18" }
 anstyle = { version = "1.0.10" }
 anyhow = { version = "1.0.80" }
+arc-swap = { version = "1.7.1" }
 assert_fs = { version = "1.1.0" }
 argfile = { version = "0.2.0" }
 bincode = { version = "2.0.0" }
@@ -126,10 +127,11 @@ quote = { version = "1.0.23" }
 rand = { version = "0.9.0" }
 rayon = { version = "1.10.0" }
 regex = { version = "1.10.2" }
+regex-automata = { version = "0.4.9" }
 rustc-hash = { version = "2.0.0" }
 rustc-stable-hash = { version = "0.1.2" }
 # When updating salsa, make sure to also update the revision in `fuzz/Cargo.toml`
-salsa = { git = "https://github.com/salsa-rs/salsa.git", rev = "7edce6e248f35c8114b4b021cdb474a3fb2813b3" }
+salsa = { git = "https://github.com/salsa-rs/salsa.git", rev = "09627e450566f894956710a3fd923dc80462ae6d" }
 schemars = { version = "0.8.16" }
 seahash = { version = "4.1.0" }
 serde = { version = "1.0.197", features = ["derive"] }
@@ -179,7 +181,6 @@ uuid = { version = "1.6.1", features = [
     "v4",
     "fast-rng",
     "macro-diagnostics",
-    "js",
 ] }
 walkdir = { version = "2.3.2" }
 wasm-bindgen = { version = "0.2.92" }
@@ -188,7 +189,7 @@ wild = { version = "2" }
 zip = { version = "0.6.6", default-features = false }
 
 [workspace.metadata.cargo-shear]
-ignored = ["getrandom", "ruff_options_metadata"]
+ignored = ["getrandom", "ruff_options_metadata", "uuid"]
 
 
 [workspace.lints.rust]

README.md

@@ -34,8 +34,7 @@ An extremely fast Python linter and code formatter, written in Rust.
 - 🔧 Fix support, for automatic error correction (e.g., automatically remove unused imports)
 - 📏 Over [800 built-in rules](https://docs.astral.sh/ruff/rules/), with native re-implementations
     of popular Flake8 plugins, like flake8-bugbear
-- ⌨️ First-party [editor integrations](https://docs.astral.sh/ruff/integrations/) for
-    [VS Code](https://github.com/astral-sh/ruff-vscode) and [more](https://docs.astral.sh/ruff/editors/setup)
+- ⌨️ First-party [editor integrations](https://docs.astral.sh/ruff/editors) for [VS Code](https://github.com/astral-sh/ruff-vscode) and [more](https://docs.astral.sh/ruff/editors/setup)
 - 🌎 Monorepo-friendly, with [hierarchical and cascading configuration](https://docs.astral.sh/ruff/configuration/#config-file-discovery)
 
 Ruff aims to be orders of magnitude faster than alternative tools while integrating more
@@ -149,8 +148,8 @@ curl -LsSf https://astral.sh/ruff/install.sh | sh
 powershell -c "irm https://astral.sh/ruff/install.ps1 | iex"
 
 # For a specific version.
-curl -LsSf https://astral.sh/ruff/0.11.10/install.sh | sh
-powershell -c "irm https://astral.sh/ruff/0.11.10/install.ps1 | iex"
+curl -LsSf https://astral.sh/ruff/0.12.0/install.sh | sh
+powershell -c "irm https://astral.sh/ruff/0.12.0/install.ps1 | iex"
 ```
 
 You can also install Ruff via [Homebrew](https://formulae.brew.sh/formula/ruff), [Conda](https://anaconda.org/conda-forge/ruff),
@@ -183,7 +182,7 @@ Ruff can also be used as a [pre-commit](https://pre-commit.com/) hook via [`ruff
 ```yaml
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.11.10
+  rev: v0.12.0
   hooks:
     # Run the linter.
     - id: ruff

_typos.toml

@@ -4,6 +4,10 @@ extend-exclude = [
     "crates/ty_vendored/vendor/**/*",
     "**/resources/**/*",
     "**/snapshots/**/*",
+    # Completion tests tend to have a lot of incomplete
+    # words naturally. It's annoying to have to make all
+    # of them actually words. So just ignore typos here.
+    "crates/ty_ide/src/completion.rs",
 ]
 
 [default.extend-words]

clippy.toml

@@ -1,6 +1,7 @@
 doc-valid-idents = [
     "..",
     "CodeQL",
+    "CPython",
     "FastAPI",
     "IPython",
     "LangChain",
@@ -14,7 +15,7 @@ doc-valid-idents = [
     "SNMPv1",
     "SNMPv2",
     "SNMPv3",
-    "PyFlakes"
+    "PyFlakes",
 ]
 
 ignore-interior-mutability = [

crates/ruff/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.11.10"
+version = "0.12.0"
 publish = true
 authors = { workspace = true }
 edition = { workspace = true }

crates/ruff/src/cache.rs

@@ -349,7 +349,6 @@ impl FileCache {
                     .iter()
                     .map(|msg| {
                         Message::diagnostic(
-                            msg.rule.into(),
                             msg.body.clone(),
                             msg.suggestion.clone(),
                             msg.range,
@@ -357,6 +356,7 @@ impl FileCache {
                             msg.parent,
                             file.clone(),
                             msg.noqa_offset,
+                            msg.rule,
                         )
                     })
                     .collect()
@@ -439,7 +439,10 @@ impl LintCacheData {
 
         let messages = messages
             .iter()
-            .filter_map(|msg| msg.to_rule().map(|rule| (rule, msg)))
+            // Parse the kebab-case rule name into a `Rule`. This will fail for syntax errors, so
+            // this also serves to filter them out, but we shouldn't be caching files with syntax
+            // errors anyway.
+            .filter_map(|msg| Some((msg.name().parse().ok()?, msg)))
             .map(|(rule, msg)| {
                 // Make sure that all message use the same source file.
                 assert_eq!(

crates/ruff/src/commands/check.rs

@@ -12,7 +12,7 @@ use rayon::prelude::*;
 use rustc_hash::FxHashMap;
 
 use ruff_db::panic::catch_unwind;
-use ruff_diagnostics::Diagnostic;
+use ruff_linter::OldDiagnostic;
 use ruff_linter::message::Message;
 use ruff_linter::package::PackageRoot;
 use ruff_linter::registry::Rule;
@@ -131,8 +131,7 @@ pub(crate) fn check(
 
                     Diagnostics::new(
                         vec![Message::from_diagnostic(
-                            Diagnostic::new(IOError { message }, TextRange::default()),
-                            dummy,
+                            OldDiagnostic::new(IOError { message }, TextRange::default(), &dummy),
                             None,
                         )],
                         FxHashMap::default(),

crates/ruff/src/commands/format.rs

@@ -822,11 +822,11 @@ pub(super) fn warn_incompatible_formatter_settings(resolver: &Resolver) {
         rule_names.sort();
         if let [rule] = rule_names.as_slice() {
             warn_user_once!(
-                "The following rule may cause conflicts when used with the formatter: {rule}. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `select` or `extend-select` configuration, or adding it to the `ignore` configuration."
+                "The following rule may cause conflicts when used with the formatter: {rule}. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `lint.select` or `lint.extend-select` configuration, or adding it to the `lint.ignore` configuration."
             );
         } else {
             warn_user_once!(
-                "The following rules may cause conflicts when used with the formatter: {}. To avoid unexpected behavior, we recommend disabling these rules, either by removing them from the `select` or `extend-select` configuration, or adding them to the `ignore` configuration.",
+                "The following rules may cause conflicts when used with the formatter: {}. To avoid unexpected behavior, we recommend disabling these rules, either by removing them from the `lint.select` or `lint.extend-select` configuration, or adding them to the `lint.ignore` configuration.",
                 rule_names.join(", ")
             );
         }

crates/ruff/src/commands/rule.rs

@@ -6,7 +6,7 @@ use serde::ser::SerializeSeq;
 use serde::{Serialize, Serializer};
 use strum::IntoEnumIterator;
 
-use ruff_diagnostics::FixAvailability;
+use ruff_linter::FixAvailability;
 use ruff_linter::registry::{Linter, Rule, RuleNamespace};
 
 use crate::args::HelpFormat;
@@ -30,7 +30,7 @@ impl<'a> Explanation<'a> {
         let (linter, _) = Linter::parse_code(&code).unwrap();
         let fix = rule.fixable().to_string();
         Self {
-            name: rule.as_ref(),
+            name: rule.name().as_str(),
             code,
             linter: linter.name(),
             summary: rule.message_formats()[0],
@@ -44,7 +44,7 @@ impl<'a> Explanation<'a> {
 
 fn format_rule_text(rule: Rule) -> String {
     let mut output = String::new();
-    let _ = write!(&mut output, "# {} ({})", rule.as_ref(), rule.noqa_code());
+    let _ = write!(&mut output, "# {} ({})", rule.name(), rule.noqa_code());
     output.push('\n');
     output.push('\n');
 

crates/ruff/src/commands/server.rs

@@ -1,14 +1,7 @@
-use std::num::NonZeroUsize;
-
 use crate::ExitStatus;
 use anyhow::Result;
-use ruff_server::Server;
 
-pub(crate) fn run_server(
-    worker_threads: NonZeroUsize,
-    preview: Option<bool>,
-) -> Result<ExitStatus> {
-    let server = Server::new(worker_threads, preview)?;
-
-    server.run().map(|()| ExitStatus::Success)
+pub(crate) fn run_server(preview: Option<bool>) -> Result<ExitStatus> {
+    ruff_server::run(preview)?;
+    Ok(ExitStatus::Success)
 }

crates/ruff/src/diagnostics.rs

@@ -12,7 +12,7 @@ use colored::Colorize;
 use log::{debug, warn};
 use rustc_hash::FxHashMap;
 
-use ruff_diagnostics::Diagnostic;
+use ruff_linter::OldDiagnostic;
 use ruff_linter::codes::Rule;
 use ruff_linter::linter::{FixTable, FixerResult, LinterResult, ParseSource, lint_fix, lint_only};
 use ruff_linter::message::Message;
@@ -64,13 +64,13 @@ impl Diagnostics {
                     let source_file = SourceFileBuilder::new(name, "").finish();
                     Self::new(
                         vec![Message::from_diagnostic(
-                            Diagnostic::new(
+                            OldDiagnostic::new(
                                 IOError {
                                     message: err.to_string(),
                                 },
                                 TextRange::default(),
+                                &source_file,
                             ),
-                            source_file,
                             None,
                         )],
                         FxHashMap::default(),
@@ -165,9 +165,9 @@ impl AddAssign for FixMap {
                 continue;
             }
             let fixed_in_file = self.0.entry(filename).or_default();
-            for (rule, count) in fixed {
+            for (rule, name, count) in fixed.iter() {
                 if count > 0 {
-                    *fixed_in_file.entry(rule).or_default() += count;
+                    *fixed_in_file.entry(rule).or_default(name) += count;
                 }
             }
         }
@@ -235,7 +235,7 @@ pub(crate) fn lint_path(
                     };
                     let source_file =
                         SourceFileBuilder::new(path.to_string_lossy(), contents).finish();
-                    lint_pyproject_toml(source_file, settings)
+                    lint_pyproject_toml(&source_file, settings)
                 } else {
                     vec![]
                 };
@@ -305,7 +305,7 @@ pub(crate) fn lint_path(
                     ParseSource::None,
                 );
                 let transformed = source_kind;
-                let fixed = FxHashMap::default();
+                let fixed = FixTable::default();
                 (result, transformed, fixed)
             }
         } else {
@@ -319,7 +319,7 @@ pub(crate) fn lint_path(
                 ParseSource::None,
             );
             let transformed = source_kind;
-            let fixed = FxHashMap::default();
+            let fixed = FixTable::default();
             (result, transformed, fixed)
         };
 
@@ -396,7 +396,7 @@ pub(crate) fn lint_stdin(
                 }
 
                 return Ok(Diagnostics {
-                    messages: lint_pyproject_toml(source_file, &settings.linter),
+                    messages: lint_pyproject_toml(&source_file, &settings.linter),
                     fixed: FixMap::from_iter([(fs::relativize_path(path), FixTable::default())]),
                     notebook_indexes: FxHashMap::default(),
                 });
@@ -473,7 +473,7 @@ pub(crate) fn lint_stdin(
                 }
 
                 let transformed = source_kind;
-                let fixed = FxHashMap::default();
+                let fixed = FixTable::default();
                 (result, transformed, fixed)
             }
         } else {
@@ -487,7 +487,7 @@ pub(crate) fn lint_stdin(
                 ParseSource::None,
             );
             let transformed = source_kind;
-            let fixed = FxHashMap::default();
+            let fixed = FixTable::default();
             (result, transformed, fixed)
         };
 

crates/ruff/src/lib.rs

@@ -2,7 +2,6 @@
 
 use std::fs::File;
 use std::io::{self, BufWriter, Write, stdout};
-use std::num::NonZeroUsize;
 use std::path::{Path, PathBuf};
 use std::process::ExitCode;
 use std::sync::mpsc::channel;
@@ -223,13 +222,7 @@ fn analyze_graph(
 }
 
 fn server(args: ServerCommand) -> Result<ExitStatus> {
-    let four = NonZeroUsize::new(4).unwrap();
-
-    // by default, we set the number of worker threads to `num_cpus`, with a maximum of 4.
-    let worker_threads = std::thread::available_parallelism()
-        .unwrap_or(four)
-        .min(four);
-    commands::server::run_server(worker_threads, args.resolve_preview())
+    commands::server::run_server(args.resolve_preview())
 }
 
 pub fn check(args: CheckCommand, global_options: GlobalConfigArgs) -> Result<ExitStatus> {

crates/ruff/src/printer.rs

@@ -7,6 +7,7 @@ use bitflags::bitflags;
 use colored::Colorize;
 use itertools::{Itertools, iterate};
 use ruff_linter::codes::NoqaCode;
+use ruff_linter::linter::FixTable;
 use serde::Serialize;
 
 use ruff_linter::fs::relativize_path;
@@ -80,7 +81,7 @@ impl Printer {
             let fixed = diagnostics
                 .fixed
                 .values()
-                .flat_map(std::collections::HashMap::values)
+                .flat_map(FixTable::counts)
                 .sum::<usize>();
 
             if self.flags.intersects(Flags::SHOW_VIOLATIONS) {
@@ -302,7 +303,7 @@ impl Printer {
         let statistics: Vec<ExpandedStatistics> = diagnostics
             .messages
             .iter()
-            .map(|message| (message.to_noqa_code(), message))
+            .map(|message| (message.noqa_code(), message))
             .sorted_by_key(|(code, message)| (*code, message.fixable()))
             .fold(
                 vec![],
@@ -472,13 +473,13 @@ fn show_fix_status(fix_mode: flags::FixMode, fixables: Option<&FixableStatistics
 fn print_fix_summary(writer: &mut dyn Write, fixed: &FixMap) -> Result<()> {
     let total = fixed
         .values()
-        .map(|table| table.values().sum::<usize>())
+        .map(|table| table.counts().sum::<usize>())
         .sum::<usize>();
     assert!(total > 0);
     let num_digits = num_digits(
-        *fixed
+        fixed
             .values()
-            .filter_map(|table| table.values().max())
+            .filter_map(|table| table.counts().max())
             .max()
             .unwrap(),
     );
@@ -498,12 +499,11 @@ fn print_fix_summary(writer: &mut dyn Write, fixed: &FixMap) -> Result<()> {
             relativize_path(filename).bold(),
             ":".cyan()
         )?;
-        for (rule, count) in table.iter().sorted_by_key(|(.., count)| Reverse(*count)) {
+        for (code, name, count) in table.iter().sorted_by_key(|(.., count)| Reverse(*count)) {
             writeln!(
                 writer,
-                "    {count:>num_digits$} × {} ({})",
-                rule.noqa_code().to_string().red().bold(),
-                rule.as_ref(),
+                "    {count:>num_digits$} × {code} ({name})",
+                code = code.to_string().red().bold(),
             )?;
         }
     }

crates/ruff/tests/analyze_graph.rs

@@ -566,7 +566,7 @@ fn venv() -> Result<()> {
         ----- stderr -----
         ruff failed
           Cause: Invalid search path settings
-          Cause: Failed to discover the site-packages directory: Invalid `--python` argument: `none` could not be canonicalized
+          Cause: Failed to discover the site-packages directory: Invalid `--python` argument `none`: does not point to a Python executable or a directory on disk
         ");
     });
 

crates/ruff/tests/format.rs

@@ -862,7 +862,7 @@ if condition:
     	print('Should change quotes')
 
     ----- stderr -----
-    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `select` or `extend-select` configuration, or adding it to the `ignore` configuration.
+    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `lint.select` or `lint.extend-select` configuration, or adding it to the `lint.ignore` configuration.
     "#);
     Ok(())
 }
@@ -999,7 +999,7 @@ def say_hy(name: str):
     1 file reformatted
 
     ----- stderr -----
-    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `select` or `extend-select` configuration, or adding it to the `ignore` configuration.
+    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `lint.select` or `lint.extend-select` configuration, or adding it to the `lint.ignore` configuration.
     warning: The `format.indent-style="tab"` option is incompatible with `W191`, which lints against all uses of tabs. We recommend disabling these rules when using the formatter, which enforces a consistent indentation style. Alternatively, set the `format.indent-style` option to `"space"`.
     warning: The `lint.flake8-implicit-str-concat.allow-multiline = false` option is incompatible with the formatter unless `ISC001` is enabled. We recommend enabling `ISC001` or setting `allow-multiline=true`.
     warning: The `format.indent-style="tab"` option is incompatible with `D206`, with requires space-based indentation. We recommend disabling these rules when using the formatter, which enforces a consistent indentation style. Alternatively, set the `format.indent-style` option to `"space"`.
@@ -1059,7 +1059,7 @@ def say_hy(name: str):
     	print(f"Hy {name}")
 
     ----- stderr -----
-    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `select` or `extend-select` configuration, or adding it to the `ignore` configuration.
+    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `lint.select` or `lint.extend-select` configuration, or adding it to the `lint.ignore` configuration.
     warning: The `format.indent-style="tab"` option is incompatible with `W191`, which lints against all uses of tabs. We recommend disabling these rules when using the formatter, which enforces a consistent indentation style. Alternatively, set the `format.indent-style` option to `"space"`.
     warning: The `format.indent-style="tab"` option is incompatible with `D206`, with requires space-based indentation. We recommend disabling these rules when using the formatter, which enforces a consistent indentation style. Alternatively, set the `format.indent-style` option to `"space"`.
     warning: The `flake8-quotes.inline-quotes="single"` option is incompatible with the formatter's `format.quote-style="double"`. We recommend disabling `Q000` and `Q003` when using the formatter, which enforces a consistent quote style. Alternatively, set both options to either `"single"` or `"double"`.
@@ -1199,7 +1199,7 @@ def say_hy(name: str):
     ----- stderr -----
     warning: `incorrect-blank-line-before-class` (D203) and `no-blank-line-before-class` (D211) are incompatible. Ignoring `incorrect-blank-line-before-class`.
     warning: `multi-line-summary-first-line` (D212) and `multi-line-summary-second-line` (D213) are incompatible. Ignoring `multi-line-summary-second-line`.
-    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `select` or `extend-select` configuration, or adding it to the `ignore` configuration.
+    warning: The following rule may cause conflicts when used with the formatter: `COM812`. To avoid unexpected behavior, we recommend disabling this rule, either by removing it from the `lint.select` or `lint.extend-select` configuration, or adding it to the `lint.ignore` configuration.
     ");
     Ok(())
 }

crates/ruff/tests/lint.rs

@@ -5436,14 +5436,15 @@ match 2:
         print("it's one")
 "#
         ),
-        @r"
-    success: true
-    exit_code: 0
+        @r###"
+    success: false
+    exit_code: 1
     ----- stdout -----
-    All checks passed!
+    test.py:2:1: SyntaxError: Cannot use `match` statement on Python 3.9 (syntax was added in Python 3.10)
+    Found 1 error.
 
     ----- stderr -----
-    "
+    "###
     );
 
     // syntax error on 3.9 with preview

crates/ruff_benchmark/benches/ty.rs

@@ -78,7 +78,7 @@ fn setup_tomllib_case() -> Case {
 
     let src_root = SystemPath::new("/src");
     let mut metadata = ProjectMetadata::discover(src_root, &system).unwrap();
-    metadata.apply_cli_options(Options {
+    metadata.apply_options(Options {
         environment: Some(EnvironmentOptions {
             python_version: Some(RangedValue::cli(PythonVersion::PY312)),
             ..EnvironmentOptions::default()
@@ -131,7 +131,7 @@ fn benchmark_incremental(criterion: &mut Criterion) {
     fn setup() -> Case {
         let case = setup_tomllib_case();
 
-        let result: Vec<_> = case.db.check().unwrap();
+        let result: Vec<_> = case.db.check();
 
         assert_diagnostics(&case.db, &result, EXPECTED_TOMLLIB_DIAGNOSTICS);
 
@@ -159,7 +159,7 @@ fn benchmark_incremental(criterion: &mut Criterion) {
             None,
         );
 
-        let result = db.check().unwrap();
+        let result = db.check();
 
         assert_eq!(result.len(), EXPECTED_TOMLLIB_DIAGNOSTICS.len());
     }
@@ -179,7 +179,7 @@ fn benchmark_cold(criterion: &mut Criterion) {
             setup_tomllib_case,
             |case| {
                 let Case { db, .. } = case;
-                let result: Vec<_> = db.check().unwrap();
+                let result: Vec<_> = db.check();
 
                 assert_diagnostics(db, &result, EXPECTED_TOMLLIB_DIAGNOSTICS);
             },
@@ -224,7 +224,7 @@ fn setup_micro_case(code: &str) -> Case {
 
     let src_root = SystemPath::new("/src");
     let mut metadata = ProjectMetadata::discover(src_root, &system).unwrap();
-    metadata.apply_cli_options(Options {
+    metadata.apply_options(Options {
         environment: Some(EnvironmentOptions {
             python_version: Some(RangedValue::cli(PythonVersion::PY312)),
             ..EnvironmentOptions::default()
@@ -293,7 +293,7 @@ fn benchmark_many_string_assignments(criterion: &mut Criterion) {
             },
             |case| {
                 let Case { db, .. } = case;
-                let result = db.check().unwrap();
+                let result = db.check();
                 assert_eq!(result.len(), 0);
             },
             BatchSize::SmallInput,
@@ -339,7 +339,7 @@ fn benchmark_many_tuple_assignments(criterion: &mut Criterion) {
             },
             |case| {
                 let Case { db, .. } = case;
-                let result = db.check().unwrap();
+                let result = db.check();
                 assert_eq!(result.len(), 0);
             },
             BatchSize::SmallInput,

crates/ruff_db/Cargo.toml

@@ -21,6 +21,7 @@ ruff_source_file = { workspace = true }
 ruff_text_size = { workspace = true }
 
 anstyle = { workspace = true }
+arc-swap = { workspace = true }
 camino = { workspace = true }
 countme = { workspace = true }
 dashmap = { workspace = true }

crates/ruff_db/src/diagnostic/mod.rs

@@ -665,6 +665,76 @@ pub enum DiagnosticId {
 
     /// No rule with the given name exists.
     UnknownRule,
+
+    /// A glob pattern doesn't follow the expected syntax.
+    InvalidGlob,
+
+    /// An `include` glob without any patterns.
+    ///
+    /// ## Why is this bad?
+    /// An `include` glob without any patterns won't match any files. This is probably a mistake and
+    /// either the `include` should be removed or a pattern should be added.
+    ///
+    /// ## Example
+    /// ```toml
+    /// [src]
+    /// include = []
+    /// ```
+    ///
+    /// Use instead:
+    ///
+    /// ```toml
+    /// [src]
+    /// include = ["src"]
+    /// ```
+    ///
+    /// or remove the `include` option.
+    EmptyInclude,
+
+    /// An override configuration is unnecessary because it applies to all files.
+    ///
+    /// ## Why is this bad?
+    /// An overrides section that applies to all files is probably a mistake and can be rolled-up into the root configuration.
+    ///
+    /// ## Example
+    /// ```toml
+    /// [[overrides]]
+    /// [overrides.rules]
+    /// unused-reference = "ignore"
+    /// ```
+    ///
+    /// Use instead:
+    ///
+    /// ```toml
+    /// [rules]
+    /// unused-reference = "ignore"
+    /// ```
+    ///
+    /// or
+    ///
+    /// ```toml
+    /// [[overrides]]
+    /// include = ["test"]
+    ///
+    /// [overrides.rules]
+    /// unused-reference = "ignore"
+    /// ```
+    UnnecessaryOverridesSection,
+
+    /// An `overrides` section in the configuration that doesn't contain any overrides.
+    ///
+    /// ## Why is this bad?
+    /// An `overrides` section without any configuration overrides is probably a mistake.
+    /// It is either a leftover after removing overrides, or a user forgot to add any overrides,
+    /// or used an incorrect syntax to do so (e.g. used `rules` instead of `overrides.rules`).
+    ///
+    /// ## Example
+    /// ```toml
+    /// [[overrides]]
+    /// include = ["test"]
+    /// # no `[overrides.rules]`
+    /// ```
+    UselessOverridesSection,
 }
 
 impl DiagnosticId {
@@ -699,6 +769,10 @@ impl DiagnosticId {
             DiagnosticId::Lint(name) => name.as_str(),
             DiagnosticId::RevealedType => "revealed-type",
             DiagnosticId::UnknownRule => "unknown-rule",
+            DiagnosticId::InvalidGlob => "invalid-glob",
+            DiagnosticId::EmptyInclude => "empty-include",
+            DiagnosticId::UnnecessaryOverridesSection => "unnecessary-overrides-section",
+            DiagnosticId::UselessOverridesSection => "useless-overrides-section",
         }
     }
 

crates/ruff_db/src/diagnostic/render.rs

@@ -265,7 +265,7 @@ impl<'a> ResolvedDiagnostic<'a> {
                 .get();
                 // The boundary case here is when `prev_context_ends`
                 // is exactly one less than `this_context_begins`. In
-                // that case, the context windows are adajcent and we
+                // that case, the context windows are adjacent and we
                 // should fall through below to add this annotation to
                 // the existing snippet.
                 if this_context_begins.saturating_sub(prev_context_ends) > 1 {
@@ -754,7 +754,7 @@ kangaroo
     static FRUITS: &str = "\
 apple
 banana
-cantelope
+cantaloupe
 lime
 orange
 pear
@@ -1376,8 +1376,8 @@ watermelon
           |
         1 | apple
         2 | banana
-        3 | cantelope
-          | ^^^^^^^^^
+        3 | cantaloupe
+          | ^^^^^^^^^^
         4 | lime
         5 | orange
           |
@@ -1479,8 +1479,8 @@ watermelon
           |
         1 | apple
         2 | banana
-        3 | cantelope
-          | ^^^^^^^^^
+        3 | cantaloupe
+          | ^^^^^^^^^^
         4 | lime
         5 | orange
           |
@@ -1515,8 +1515,8 @@ watermelon
           |
         1 | apple
         2 | banana
-        3 | cantelope
-          | ^^^^^^^^^
+        3 | cantaloupe
+          | ^^^^^^^^^^
         4 | lime
         5 | orange
           |
@@ -1562,8 +1562,8 @@ watermelon
           |
         1 | apple
         2 | banana
-        3 | cantelope
-          | ^^^^^^^^^
+        3 | cantaloupe
+          | ^^^^^^^^^^
         4 | lime
         5 | orange
           |
@@ -2040,7 +2040,7 @@ watermelon
         1 | apple
           | ^^^^^ primary
         2 | banana
-        3 | cantelope
+        3 | cantaloupe
           |
          ::: animals:1:1
           |

crates/ruff_db/src/files.rs

@@ -275,7 +275,12 @@ impl fmt::Debug for Files {
 impl std::panic::RefUnwindSafe for Files {}
 
 /// A file that's either stored on the host system's file system or in the vendored file system.
+///
+/// # Ordering
+/// Ordering is based on the file's salsa-assigned id and not on its values.
+/// The id may change between runs.
 #[salsa::input]
+#[derive(PartialOrd, Ord)]
 pub struct File {
     /// The path of the file (immutable).
     #[returns(ref)]

crates/ruff_db/src/lib.rs

@@ -59,6 +59,13 @@ pub fn max_parallelism() -> NonZeroUsize {
         })
 }
 
+/// Trait for types that can provide Rust documentation.
+///
+/// Use `derive(RustDoc)` to automatically implement this trait for types that have a static string documentation.
+pub trait RustDoc {
+    fn rust_doc() -> &'static str;
+}
+
 #[cfg(test)]
 mod tests {
     use std::sync::{Arc, Mutex};

crates/ruff_db/src/panic.rs

@@ -1,3 +1,4 @@
+use std::any::Any;
 use std::backtrace::BacktraceStatus;
 use std::cell::Cell;
 use std::panic::Location;
@@ -24,17 +25,25 @@ impl Payload {
             None
         }
     }
+
+    pub fn downcast_ref<R: Any>(&self) -> Option<&R> {
+        self.0.downcast_ref::<R>()
+    }
 }
 
 impl std::fmt::Display for PanicError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        writeln!(f, "panicked at")?;
+        write!(f, "panicked at")?;
         if let Some(location) = &self.location {
             write!(f, " {location}")?;
         }
         if let Some(payload) = self.payload.as_str() {
             write!(f, ":\n{payload}")?;
         }
+        if let Some(query_trace) = self.salsa_backtrace.as_ref() {
+            let _ = writeln!(f, "{query_trace}");
+        }
+
         if let Some(backtrace) = &self.backtrace {
             match backtrace.status() {
                 BacktraceStatus::Disabled => {
@@ -49,6 +58,7 @@ impl std::fmt::Display for PanicError {
                 _ => {}
             }
         }
+
         Ok(())
     }
 }

crates/ruff_db/src/parsed.rs

@@ -1,8 +1,8 @@
 use std::fmt::Formatter;
-use std::ops::Deref;
 use std::sync::Arc;
 
-use ruff_python_ast::ModModule;
+use arc_swap::ArcSwapOption;
+use ruff_python_ast::{AnyRootNodeRef, ModModule, NodeIndex};
 use ruff_python_parser::{ParseOptions, Parsed, parse_unchecked};
 
 use crate::Db;
@@ -18,48 +18,86 @@ use crate::source::source_text;
 /// The query is only cached when the [`source_text()`] hasn't changed. This is because
 /// comparing two ASTs is a non-trivial operation and every offset change is directly
 /// reflected in the changed AST offsets.
-/// The other reason is that Ruff's AST doesn't implement `Eq` which Sala requires
+/// The other reason is that Ruff's AST doesn't implement `Eq` which Salsa requires
 /// for determining if a query result is unchanged.
 #[salsa::tracked(returns(ref), no_eq)]
 pub fn parsed_module(db: &dyn Db, file: File) -> ParsedModule {
     let _span = tracing::trace_span!("parsed_module", ?file).entered();
 
+    let parsed = parsed_module_impl(db, file);
+
+    ParsedModule::new(file, parsed)
+}
+
+pub fn parsed_module_impl(db: &dyn Db, file: File) -> Parsed<ModModule> {
     let source = source_text(db, file);
     let ty = file.source_type(db);
 
     let target_version = db.python_version();
     let options = ParseOptions::from(ty).with_target_version(target_version);
-    let parsed = parse_unchecked(&source, options)
+    parse_unchecked(&source, options)
         .try_into_module()
-        .expect("PySourceType always parses into a module");
-
-    ParsedModule::new(parsed)
+        .expect("PySourceType always parses into a module")
 }
 
-/// Cheap cloneable wrapper around the parsed module.
+/// A wrapper around a parsed module.
+///
+/// This type manages instances of the module AST. A particular instance of the AST
+/// is represented with the [`ParsedModuleRef`] type.
 #[derive(Clone)]
 pub struct ParsedModule {
-    inner: Arc<Parsed<ModModule>>,
+    file: File,
+    inner: Arc<ArcSwapOption<indexed::IndexedModule>>,
 }
 
 impl ParsedModule {
-    pub fn new(parsed: Parsed<ModModule>) -> Self {
+    pub fn new(file: File, parsed: Parsed<ModModule>) -> Self {
         Self {
-            inner: Arc::new(parsed),
+            file,
+            inner: Arc::new(ArcSwapOption::new(Some(indexed::IndexedModule::new(
+                parsed,
+            )))),
+        }
+    }
+    /// Loads a reference to the parsed module.
+    ///
+    /// Note that holding on to the reference will prevent garbage collection
+    /// of the AST. This method will reparse the module if it has been collected.
+    pub fn load(&self, db: &dyn Db) -> ParsedModuleRef {
+        let parsed = match self.inner.load_full() {
+            Some(parsed) => parsed,
+            None => {
+                // Re-parse the file.
+                let parsed = indexed::IndexedModule::new(parsed_module_impl(db, self.file));
+                tracing::debug!(
+                    "File `{}` was reparsed after being collected in the current Salsa revision",
+                    self.file.path(db)
+                );
+
+                self.inner.store(Some(parsed.clone()));
+                parsed
+            }
+        };
+
+        ParsedModuleRef {
+            module: self.clone(),
+            indexed: parsed,
         }
     }
 
-    /// Consumes `self` and returns the Arc storing the parsed module.
-    pub fn into_arc(self) -> Arc<Parsed<ModModule>> {
-        self.inner
+    /// Clear the parsed module, dropping the AST once all references to it are dropped.
+    pub fn clear(&self) {
+        self.inner.store(None);
     }
-}
 
-impl Deref for ParsedModule {
-    type Target = Parsed<ModModule>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.inner
+    /// Returns a pointer for this [`ParsedModule`].
+    ///
+    /// The pointer uniquely identifies the module within the current Salsa revision,
+    /// regardless of whether particular [`ParsedModuleRef`] instances are garbage collected.
+    pub fn as_ptr(&self) -> *const () {
+        // Note that the outer `Arc` in `inner` is stable across garbage collection, while the inner
+        // `Arc` within the `ArcSwap` may change.
+        Arc::as_ptr(&self.inner).cast()
     }
 }
 
@@ -77,6 +115,273 @@ impl PartialEq for ParsedModule {
 
 impl Eq for ParsedModule {}
 
+/// Cheap cloneable wrapper around an instance of a module AST.
+#[derive(Clone)]
+pub struct ParsedModuleRef {
+    module: ParsedModule,
+    indexed: Arc<indexed::IndexedModule>,
+}
+
+impl ParsedModuleRef {
+    /// Returns a reference to the [`ParsedModule`] that this instance was loaded from.
+    pub fn module(&self) -> &ParsedModule {
+        &self.module
+    }
+
+    /// Returns a reference to the AST node at the given index.
+    pub fn get_by_index<'ast>(&'ast self, index: NodeIndex) -> AnyRootNodeRef<'ast> {
+        self.indexed.get_by_index(index)
+    }
+}
+
+impl std::ops::Deref for ParsedModuleRef {
+    type Target = Parsed<ModModule>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.indexed.parsed
+    }
+}
+
+mod indexed {
+    use std::sync::Arc;
+
+    use ruff_python_ast::visitor::source_order::*;
+    use ruff_python_ast::*;
+    use ruff_python_parser::Parsed;
+
+    /// A wrapper around the AST that allows access to AST nodes by index.
+    #[derive(Debug)]
+    pub struct IndexedModule {
+        index: Box<[AnyRootNodeRef<'static>]>,
+        pub parsed: Parsed<ModModule>,
+    }
+
+    impl IndexedModule {
+        /// Create a new [`IndexedModule`] from the given AST.
+        #[allow(clippy::unnecessary_cast)]
+        pub fn new(parsed: Parsed<ModModule>) -> Arc<Self> {
+            let mut visitor = Visitor {
+                nodes: Vec::new(),
+                index: 0,
+            };
+
+            let mut inner = Arc::new(IndexedModule {
+                parsed,
+                index: Box::new([]),
+            });
+
+            AnyNodeRef::from(inner.parsed.syntax()).visit_source_order(&mut visitor);
+
+            let index: Box<[AnyRootNodeRef<'_>]> = visitor.nodes.into_boxed_slice();
+
+            // SAFETY: We cast from `Box<[AnyRootNodeRef<'_>]>` to `Box<[AnyRootNodeRef<'static>]>`,
+            // faking the 'static lifetime to create the self-referential struct. The node references
+            // are into the `Arc<Parsed<ModModule>>`, so are valid for as long as the `IndexedModule`
+            // is alive. We make sure to restore the correct lifetime in `get_by_index`.
+            //
+            // Note that we can never move the data within the `Arc` after this point.
+            Arc::get_mut(&mut inner).unwrap().index =
+                unsafe { Box::from_raw(Box::into_raw(index) as *mut [AnyRootNodeRef<'static>]) };
+
+            inner
+        }
+
+        /// Returns the node at the given index.
+        pub fn get_by_index<'ast>(&'ast self, index: NodeIndex) -> AnyRootNodeRef<'ast> {
+            // Note that this method restores the correct lifetime: the nodes are valid for as
+            // long as the reference to `IndexedModule` is alive.
+            self.index[index.as_usize()]
+        }
+    }
+
+    /// A visitor that collects nodes in source order.
+    pub struct Visitor<'a> {
+        pub index: u32,
+        pub nodes: Vec<AnyRootNodeRef<'a>>,
+    }
+
+    impl<'a> Visitor<'a> {
+        fn visit_node<T>(&mut self, node: &'a T)
+        where
+            T: HasNodeIndex + std::fmt::Debug,
+            AnyRootNodeRef<'a>: From<&'a T>,
+        {
+            node.node_index().set(self.index);
+            self.nodes.push(AnyRootNodeRef::from(node));
+            self.index += 1;
+        }
+    }
+
+    impl<'a> SourceOrderVisitor<'a> for Visitor<'a> {
+        #[inline]
+        fn visit_mod(&mut self, module: &'a Mod) {
+            self.visit_node(module);
+            walk_module(self, module);
+        }
+
+        #[inline]
+        fn visit_stmt(&mut self, stmt: &'a Stmt) {
+            self.visit_node(stmt);
+            walk_stmt(self, stmt);
+        }
+
+        #[inline]
+        fn visit_annotation(&mut self, expr: &'a Expr) {
+            self.visit_node(expr);
+            walk_annotation(self, expr);
+        }
+
+        #[inline]
+        fn visit_expr(&mut self, expr: &'a Expr) {
+            self.visit_node(expr);
+            walk_expr(self, expr);
+        }
+
+        #[inline]
+        fn visit_decorator(&mut self, decorator: &'a Decorator) {
+            self.visit_node(decorator);
+            walk_decorator(self, decorator);
+        }
+
+        #[inline]
+        fn visit_comprehension(&mut self, comprehension: &'a Comprehension) {
+            self.visit_node(comprehension);
+            walk_comprehension(self, comprehension);
+        }
+
+        #[inline]
+        fn visit_except_handler(&mut self, except_handler: &'a ExceptHandler) {
+            self.visit_node(except_handler);
+            walk_except_handler(self, except_handler);
+        }
+
+        #[inline]
+        fn visit_arguments(&mut self, arguments: &'a Arguments) {
+            self.visit_node(arguments);
+            walk_arguments(self, arguments);
+        }
+
+        #[inline]
+        fn visit_parameters(&mut self, parameters: &'a Parameters) {
+            self.visit_node(parameters);
+            walk_parameters(self, parameters);
+        }
+
+        #[inline]
+        fn visit_parameter(&mut self, arg: &'a Parameter) {
+            self.visit_node(arg);
+            walk_parameter(self, arg);
+        }
+
+        fn visit_parameter_with_default(
+            &mut self,
+            parameter_with_default: &'a ParameterWithDefault,
+        ) {
+            self.visit_node(parameter_with_default);
+            walk_parameter_with_default(self, parameter_with_default);
+        }
+
+        #[inline]
+        fn visit_keyword(&mut self, keyword: &'a Keyword) {
+            self.visit_node(keyword);
+            walk_keyword(self, keyword);
+        }
+
+        #[inline]
+        fn visit_alias(&mut self, alias: &'a Alias) {
+            self.visit_node(alias);
+            walk_alias(self, alias);
+        }
+
+        #[inline]
+        fn visit_with_item(&mut self, with_item: &'a WithItem) {
+            self.visit_node(with_item);
+            walk_with_item(self, with_item);
+        }
+
+        #[inline]
+        fn visit_type_params(&mut self, type_params: &'a TypeParams) {
+            self.visit_node(type_params);
+            walk_type_params(self, type_params);
+        }
+
+        #[inline]
+        fn visit_type_param(&mut self, type_param: &'a TypeParam) {
+            self.visit_node(type_param);
+            walk_type_param(self, type_param);
+        }
+
+        #[inline]
+        fn visit_match_case(&mut self, match_case: &'a MatchCase) {
+            self.visit_node(match_case);
+            walk_match_case(self, match_case);
+        }
+
+        #[inline]
+        fn visit_pattern(&mut self, pattern: &'a Pattern) {
+            self.visit_node(pattern);
+            walk_pattern(self, pattern);
+        }
+
+        #[inline]
+        fn visit_pattern_arguments(&mut self, pattern_arguments: &'a PatternArguments) {
+            self.visit_node(pattern_arguments);
+            walk_pattern_arguments(self, pattern_arguments);
+        }
+
+        #[inline]
+        fn visit_pattern_keyword(&mut self, pattern_keyword: &'a PatternKeyword) {
+            self.visit_node(pattern_keyword);
+            walk_pattern_keyword(self, pattern_keyword);
+        }
+
+        #[inline]
+        fn visit_elif_else_clause(&mut self, elif_else_clause: &'a ElifElseClause) {
+            self.visit_node(elif_else_clause);
+            walk_elif_else_clause(self, elif_else_clause);
+        }
+
+        #[inline]
+        fn visit_f_string(&mut self, f_string: &'a FString) {
+            self.visit_node(f_string);
+            walk_f_string(self, f_string);
+        }
+
+        #[inline]
+        fn visit_interpolated_string_element(
+            &mut self,
+            interpolated_string_element: &'a InterpolatedStringElement,
+        ) {
+            self.visit_node(interpolated_string_element);
+            walk_interpolated_string_element(self, interpolated_string_element);
+        }
+
+        #[inline]
+        fn visit_t_string(&mut self, t_string: &'a TString) {
+            self.visit_node(t_string);
+            walk_t_string(self, t_string);
+        }
+
+        #[inline]
+        fn visit_string_literal(&mut self, string_literal: &'a StringLiteral) {
+            self.visit_node(string_literal);
+            walk_string_literal(self, string_literal);
+        }
+
+        #[inline]
+        fn visit_bytes_literal(&mut self, bytes_literal: &'a BytesLiteral) {
+            self.visit_node(bytes_literal);
+            walk_bytes_literal(self, bytes_literal);
+        }
+
+        #[inline]
+        fn visit_identifier(&mut self, identifier: &'a Identifier) {
+            self.visit_node(identifier);
+            walk_identifier(self, identifier);
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use crate::Db;
@@ -98,7 +403,7 @@ mod tests {
 
         let file = system_path_to_file(&db, path).unwrap();
 
-        let parsed = parsed_module(&db, file);
+        let parsed = parsed_module(&db, file).load(&db);
 
         assert!(parsed.has_valid_syntax());
 
@@ -114,7 +419,7 @@ mod tests {
 
         let file = system_path_to_file(&db, path).unwrap();
 
-        let parsed = parsed_module(&db, file);
+        let parsed = parsed_module(&db, file).load(&db);
 
         assert!(parsed.has_valid_syntax());
 
@@ -130,7 +435,7 @@ mod tests {
 
         let virtual_file = db.files().virtual_file(&db, path);
 
-        let parsed = parsed_module(&db, virtual_file.file());
+        let parsed = parsed_module(&db, virtual_file.file()).load(&db);
 
         assert!(parsed.has_valid_syntax());
 
@@ -146,7 +451,7 @@ mod tests {
 
         let virtual_file = db.files().virtual_file(&db, path);
 
-        let parsed = parsed_module(&db, virtual_file.file());
+        let parsed = parsed_module(&db, virtual_file.file()).load(&db);
 
         assert!(parsed.has_valid_syntax());
 
@@ -177,7 +482,7 @@ else:
 
         let file = vendored_path_to_file(&db, VendoredPath::new("path.pyi")).unwrap();
 
-        let parsed = parsed_module(&db, file);
+        let parsed = parsed_module(&db, file).load(&db);
 
         assert!(parsed.has_valid_syntax());
     }

crates/ruff_db/src/system.rs

@@ -171,6 +171,21 @@ pub trait System: Debug {
         PatternError,
     >;
 
+    /// Fetches the environment variable `key` from the current process.
+    ///
+    /// # Errors
+    ///
+    /// Returns [`std::env::VarError::NotPresent`] if:
+    /// - The variable is not set.
+    /// - The variable's name contains an equal sign or NUL (`'='` or `'\0'`).
+    ///
+    /// Returns [`std::env::VarError::NotUnicode`] if the variable's value is not valid
+    /// Unicode.
+    fn env_var(&self, name: &str) -> std::result::Result<String, std::env::VarError> {
+        let _ = name;
+        Err(std::env::VarError::NotPresent)
+    }
+
     fn as_any(&self) -> &dyn std::any::Any;
 
     fn as_any_mut(&mut self) -> &mut dyn std::any::Any;

crates/ruff_db/src/system/os.rs

@@ -214,6 +214,10 @@ impl System for OsSystem {
             })
         })))
     }
+
+    fn env_var(&self, name: &str) -> std::result::Result<String, std::env::VarError> {
+        std::env::var(name)
+    }
 }
 
 impl OsSystem {

crates/ruff_db/src/system/path.rs

@@ -45,6 +45,30 @@ impl SystemPath {
         SystemPath::from_std_path(dunce::simplified(self.as_std_path())).unwrap()
     }
 
+    /// Returns `true` if the `SystemPath` is absolute, i.e., if it is independent of
+    /// the current directory.
+    ///
+    /// * On Unix, a path is absolute if it starts with the root, so
+    ///   `is_absolute` and [`has_root`] are equivalent.
+    ///
+    /// * On Windows, a path is absolute if it has a prefix and starts with the
+    ///   root: `c:\windows` is absolute, while `c:temp` and `\temp` are not.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use ruff_db::system::SystemPath;
+    ///
+    /// assert!(!SystemPath::new("foo.txt").is_absolute());
+    /// ```
+    ///
+    /// [`has_root`]: Utf8Path::has_root
+    #[inline]
+    #[must_use]
+    pub fn is_absolute(&self) -> bool {
+        self.0.is_absolute()
+    }
+
     /// Extracts the file extension, if possible.
     ///
     /// The extension is:
@@ -538,6 +562,10 @@ impl SystemPathBuf {
         self.0.into_std_path_buf()
     }
 
+    pub fn into_string(self) -> String {
+        self.0.into_string()
+    }
+
     #[inline]
     pub fn as_path(&self) -> &SystemPath {
         SystemPath::new(&self.0)
@@ -596,6 +624,13 @@ impl AsRef<SystemPath> for Utf8PathBuf {
     }
 }
 
+impl AsRef<SystemPath> for camino::Utf8Component<'_> {
+    #[inline]
+    fn as_ref(&self) -> &SystemPath {
+        SystemPath::new(self.as_str())
+    }
+}
+
 impl AsRef<SystemPath> for str {
     #[inline]
     fn as_ref(&self) -> &SystemPath {
@@ -626,6 +661,22 @@ impl Deref for SystemPathBuf {
     }
 }
 
+impl<P: AsRef<SystemPath>> FromIterator<P> for SystemPathBuf {
+    fn from_iter<I: IntoIterator<Item = P>>(iter: I) -> Self {
+        let mut buf = SystemPathBuf::new();
+        buf.extend(iter);
+        buf
+    }
+}
+
+impl<P: AsRef<SystemPath>> Extend<P> for SystemPathBuf {
+    fn extend<I: IntoIterator<Item = P>>(&mut self, iter: I) {
+        for path in iter {
+            self.push(path);
+        }
+    }
+}
+
 impl std::fmt::Debug for SystemPath {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         self.0.fmt(f)

crates/ruff_db/src/testing.rs

@@ -13,12 +13,12 @@ pub fn assert_function_query_was_not_run<Db, Q, QDb, I, R>(
     Q: Fn(QDb, I) -> R,
     I: salsa::plumbing::AsId + std::fmt::Debug + Copy,
 {
-    let id = input.as_id().as_u32();
+    let id = input.as_id();
     let (query_name, will_execute_event) = find_will_execute_event(db, query, input, events);
 
     db.attach(|_| {
         if let Some(will_execute_event) = will_execute_event {
-            panic!("Expected query {query_name}({id}) not to have run but it did: {will_execute_event:?}\n\n{events:#?}");
+            panic!("Expected query {query_name}({id:?}) not to have run but it did: {will_execute_event:?}\n\n{events:#?}");
         }
     });
 }
@@ -65,7 +65,7 @@ pub fn assert_function_query_was_run<Db, Q, QDb, I, R>(
     Q: Fn(QDb, I) -> R,
     I: salsa::plumbing::AsId + std::fmt::Debug + Copy,
 {
-    let id = input.as_id().as_u32();
+    let id = input.as_id();
     let (query_name, will_execute_event) = find_will_execute_event(db, query, input, events);
 
     db.attach(|_| {
@@ -224,7 +224,7 @@ fn query_was_not_run() {
 }
 
 #[test]
-#[should_panic(expected = "Expected query len(0) not to have run but it did:")]
+#[should_panic(expected = "Expected query len(Id(0)) not to have run but it did:")]
 fn query_was_not_run_fails_if_query_was_run() {
     use crate::tests::TestDb;
     use salsa::prelude::*;
@@ -287,7 +287,7 @@ fn const_query_was_not_run_fails_if_query_was_run() {
 }
 
 #[test]
-#[should_panic(expected = "Expected query len(0) to have run but it did not:")]
+#[should_panic(expected = "Expected query len(Id(0)) to have run but it did not:")]
 fn query_was_run_fails_if_query_was_not_run() {
     use crate::tests::TestDb;
     use salsa::prelude::*;

crates/ruff_dev/Cargo.toml

@@ -14,7 +14,6 @@ license = { workspace = true }
 ty = { workspace = true }
 ty_project = { workspace = true, features = ["schemars"] }
 ruff = { workspace = true }
-ruff_diagnostics = { workspace = true }
 ruff_formatter = { workspace = true }
 ruff_linter = { workspace = true, features = ["schemars"] }
 ruff_notebook = { workspace = true }

crates/ruff_dev/src/generate_docs.rs

@@ -10,7 +10,7 @@ use itertools::Itertools;
 use regex::{Captures, Regex};
 use strum::IntoEnumIterator;
 
-use ruff_diagnostics::FixAvailability;
+use ruff_linter::FixAvailability;
 use ruff_linter::registry::{Linter, Rule, RuleNamespace};
 use ruff_options_metadata::{OptionEntry, OptionsMetadata};
 use ruff_workspace::options::Options;
@@ -29,7 +29,7 @@ pub(crate) fn main(args: &Args) -> Result<()> {
         if let Some(explanation) = rule.explanation() {
             let mut output = String::new();
 
-            let _ = writeln!(&mut output, "# {} ({})", rule.as_ref(), rule.noqa_code());
+            let _ = writeln!(&mut output, "# {} ({})", rule.name(), rule.noqa_code());
 
             let (linter, _) = Linter::parse_code(&rule.noqa_code().to_string()).unwrap();
             if linter.url().is_some() {
@@ -101,7 +101,7 @@ pub(crate) fn main(args: &Args) -> Result<()> {
             let filename = PathBuf::from(ROOT_DIR)
                 .join("docs")
                 .join("rules")
-                .join(rule.as_ref())
+                .join(&*rule.name())
                 .with_extension("md");
 
             if args.dry_run {

crates/ruff_dev/src/generate_rules_table.rs

@@ -8,7 +8,7 @@ use std::borrow::Cow;
 use std::fmt::Write;
 use strum::IntoEnumIterator;
 
-use ruff_diagnostics::FixAvailability;
+use ruff_linter::FixAvailability;
 use ruff_linter::registry::{Linter, Rule, RuleNamespace};
 use ruff_linter::upstream_categories::UpstreamCategoryAndPrefix;
 use ruff_options_metadata::OptionsMetadata;
@@ -18,45 +18,44 @@ const FIX_SYMBOL: &str = "🛠️";
 const PREVIEW_SYMBOL: &str = "🧪";
 const REMOVED_SYMBOL: &str = "❌";
 const WARNING_SYMBOL: &str = "⚠️";
-const STABLE_SYMBOL: &str = "✔️";
 const SPACER: &str = "    ";
 
+/// Style for the rule's fixability and status icons.
+const SYMBOL_STYLE: &str = "style='width: 1em; display: inline-block;'";
+/// Style for the container wrapping the fixability and status icons.
+const SYMBOLS_CONTAINER: &str = "style='display: flex; gap: 0.5rem; justify-content: end;'";
+
 fn generate_table(table_out: &mut String, rules: impl IntoIterator<Item = Rule>, linter: &Linter) {
-    table_out.push_str("| Code | Name | Message | |");
+    table_out.push_str("| Code | Name | Message |    |");
     table_out.push('\n');
-    table_out.push_str("| ---- | ---- | ------- | ------: |");
+    table_out.push_str("| ---- | ---- | ------- | -: |");
     table_out.push('\n');
     for rule in rules {
         let status_token = match rule.group() {
             RuleGroup::Removed => {
-                format!("<span title='Rule has been removed'>{REMOVED_SYMBOL}</span>")
+                format!(
+                    "<span {SYMBOL_STYLE} title='Rule has been removed'>{REMOVED_SYMBOL}</span>"
+                )
             }
             RuleGroup::Deprecated => {
-                format!("<span title='Rule has been deprecated'>{WARNING_SYMBOL}</span>")
+                format!(
+                    "<span {SYMBOL_STYLE} title='Rule has been deprecated'>{WARNING_SYMBOL}</span>"
+                )
             }
             RuleGroup::Preview => {
-                format!("<span title='Rule is in preview'>{PREVIEW_SYMBOL}</span>")
-            }
-            RuleGroup::Stable => {
-                // A full opacity checkmark is a bit aggressive for indicating stable
-                format!("<span title='Rule is stable' style='opacity: 0.6'>{STABLE_SYMBOL}</span>")
+                format!("<span {SYMBOL_STYLE} title='Rule is in preview'>{PREVIEW_SYMBOL}</span>")
             }
+            RuleGroup::Stable => format!("<span {SYMBOL_STYLE}></span>"),
         };
 
         let fix_token = match rule.fixable() {
             FixAvailability::Always | FixAvailability::Sometimes => {
-                format!("<span title='Automatic fix available'>{FIX_SYMBOL}</span>")
-            }
-            FixAvailability::None => {
-                format!(
-                    "<span title='Automatic fix not available' style='opacity: 0.1' aria-hidden='true'>{FIX_SYMBOL}</span>"
-                )
+                format!("<span {SYMBOL_STYLE} title='Automatic fix available'>{FIX_SYMBOL}</span>")
             }
+            FixAvailability::None => format!("<span {SYMBOL_STYLE}></span>"),
         };
 
-        let tokens = format!("{status_token} {fix_token}");
-
-        let rule_name = rule.as_ref();
+        let rule_name = rule.name();
 
         // If the message ends in a bracketed expression (like: "Use {replacement}"), escape the
         // brackets. Otherwise, it'll be interpreted as an HTML attribute via the `attr_list`
@@ -82,15 +81,14 @@ fn generate_table(table_out: &mut String, rules: impl IntoIterator<Item = Rule>,
         #[expect(clippy::or_fun_call)]
         let _ = write!(
             table_out,
-            "| {ss}{0}{1}{se} {{ #{0}{1} }} | {ss}{2}{se} | {ss}{3}{se} | {ss}{4}{se} |",
-            linter.common_prefix(),
-            linter.code_for_rule(rule).unwrap(),
-            rule.explanation()
+            "| {ss}{prefix}{code}{se} {{ #{prefix}{code} }} | {ss}{explanation}{se} | {ss}{message}{se} | <div {SYMBOLS_CONTAINER}>{status_token}{fix_token}</div>|",
+            prefix = linter.common_prefix(),
+            code = linter.code_for_rule(rule).unwrap(),
+            explanation = rule
+                .explanation()
                 .is_some()
                 .then_some(format_args!("[{rule_name}](rules/{rule_name}.md)"))
                 .unwrap_or(format_args!("{rule_name}")),
-            message,
-            tokens,
         );
         table_out.push('\n');
     }
@@ -104,12 +102,6 @@ pub(crate) fn generate() -> String {
     table_out.push_str("### Legend");
     table_out.push('\n');
 
-    let _ = write!(
-        &mut table_out,
-        "{SPACER}{STABLE_SYMBOL}{SPACER} The rule is stable."
-    );
-    table_out.push_str("<br />");
-
     let _ = write!(
         &mut table_out,
         "{SPACER}{PREVIEW_SYMBOL}{SPACER} The rule is unstable and is in [\"preview\"](faq.md#what-is-preview)."
@@ -132,7 +124,8 @@ pub(crate) fn generate() -> String {
         &mut table_out,
         "{SPACER}{FIX_SYMBOL}{SPACER} The rule is automatically fixable by the `--fix` command-line option."
     );
-    table_out.push_str("<br />");
+    table_out.push_str("\n\n");
+    table_out.push_str("All rules not marked as preview, deprecated or removed are stable.");
     table_out.push('\n');
 
     for linter in Linter::iter() {

crates/ruff_dev/src/generate_ty_cli_reference.rs

@@ -80,6 +80,7 @@ fn generate() -> String {
 
     let mut parents = Vec::new();
 
+    output.push_str("<!-- WARNING: This file is auto-generated (cargo dev generate-all). Edit the doc comments in 'crates/ty/src/args.rs' if you want to change anything here. -->\n\n");
     output.push_str("# CLI Reference\n\n");
     generate_command(&mut output, &ty, &mut parents);
 

crates/ruff_dev/src/generate_ty_options.rs

@@ -25,6 +25,10 @@ pub(crate) fn main(args: &Args) -> anyhow::Result<()> {
     let file_name = "crates/ty/docs/configuration.md";
     let markdown_path = PathBuf::from(ROOT_DIR).join(file_name);
 
+    output.push_str(
+        "<!-- WARNING: This file is auto-generated (cargo dev generate-all). Update the doc comments on the 'Options' struct in 'crates/ty_project/src/metadata/options.rs' if you want to change anything here. -->\n\n",
+    );
+
     generate_set(
         &mut output,
         Set::Toplevel(Options::metadata()),

crates/ruff_dev/src/generate_ty_rules.rs

@@ -56,6 +56,10 @@ fn generate_markdown() -> String {
 
     let mut output = String::new();
 
+    let _ = writeln!(
+        &mut output,
+        "<!-- WARNING: This file is auto-generated (cargo dev generate-all). Edit the lint-declarations in 'crates/ty_python_semantic/src/types/diagnostic.rs' if you want to change anything here. -->\n"
+    );
     let _ = writeln!(&mut output, "# Rules\n");
 
     let mut lints: Vec<_> = registry.lints().iter().collect();

crates/ruff_diagnostics/Cargo.toml

@@ -16,7 +16,5 @@ doctest = false
 [dependencies]
 ruff_text_size = { workspace = true }
 
-anyhow = { workspace = true }
-log = { workspace = true }
 is-macro = { workspace = true }
 serde = { workspace = true, optional = true, features = [] }

crates/ruff_diagnostics/src/lib.rs

@@ -1,11 +1,7 @@
-pub use diagnostic::Diagnostic;
 pub use edit::Edit;
 pub use fix::{Applicability, Fix, IsolationLevel};
 pub use source_map::{SourceMap, SourceMarker};
-pub use violation::{AlwaysFixableViolation, FixAvailability, Violation, ViolationMetadata};
 
-mod diagnostic;
 mod edit;
 mod fix;
 mod source_map;
-mod violation;

crates/ruff_graph/src/collector.rs

@@ -39,6 +39,7 @@ impl<'ast> SourceOrderVisitor<'ast> for Collector<'_> {
                 module,
                 level,
                 range: _,
+                node_index: _,
             }) => {
                 let module = module.as_deref();
                 let level = *level;
@@ -78,7 +79,11 @@ impl<'ast> SourceOrderVisitor<'ast> for Collector<'_> {
                     }
                 }
             }
-            Stmt::Import(ast::StmtImport { names, range: _ }) => {
+            Stmt::Import(ast::StmtImport {
+                names,
+                range: _,
+                node_index: _,
+            }) => {
                 for alias in names {
                     if let Some(module_name) = ModuleName::new(alias.name.as_str()) {
                         self.imports.push(CollectedImport::Import(module_name));
@@ -122,7 +127,12 @@ impl<'ast> SourceOrderVisitor<'ast> for Collector<'_> {
 
     fn visit_expr(&mut self, expr: &'ast Expr) {
         if self.string_imports {
-            if let Expr::StringLiteral(ast::ExprStringLiteral { value, range: _ }) = expr {
+            if let Expr::StringLiteral(ast::ExprStringLiteral {
+                value,
+                range: _,
+                node_index: _,
+            }) = expr
+            {
                 // Determine whether the string literal "looks like" an import statement: contains
                 // a dot, and consists solely of valid Python identifiers.
                 let value = value.to_str();

crates/ruff_graph/src/db.rs

@@ -9,8 +9,8 @@ use ruff_db::{Db as SourceDb, Upcast};
 use ruff_python_ast::PythonVersion;
 use ty_python_semantic::lint::{LintRegistry, RuleSelection};
 use ty_python_semantic::{
-    Db, Program, ProgramSettings, PythonPath, PythonPlatform, SearchPathSettings,
-    default_lint_registry,
+    Db, Program, ProgramSettings, PythonPath, PythonPlatform, PythonVersionSource,
+    PythonVersionWithSource, SearchPathSettings, SysPrefixPathOrigin, default_lint_registry,
 };
 
 static EMPTY_VENDORED: std::sync::LazyLock<VendoredFileSystem> = std::sync::LazyLock::new(|| {
@@ -37,14 +37,18 @@ impl ModuleDb {
     ) -> Result<Self> {
         let mut search_paths = SearchPathSettings::new(src_roots);
         if let Some(venv_path) = venv_path {
-            search_paths.python_path = PythonPath::from_cli_flag(venv_path);
+            search_paths.python_path =
+                PythonPath::sys_prefix(venv_path, SysPrefixPathOrigin::PythonCliFlag);
         }
 
         let db = Self::default();
         Program::from_settings(
             &db,
             ProgramSettings {
-                python_version,
+                python_version: Some(PythonVersionWithSource {
+                    version: python_version,
+                    source: PythonVersionSource::default(),
+                }),
                 python_platform: PythonPlatform::default(),
                 search_paths,
             },
@@ -88,7 +92,7 @@ impl Db for ModuleDb {
         !file.path(self).is_vendored_path()
     }
 
-    fn rule_selection(&self) -> &RuleSelection {
+    fn rule_selection(&self, _file: File) -> &RuleSelection {
         &self.rule_selection
     }
 

crates/ruff_graph/src/resolver.rs

@@ -19,19 +19,20 @@ impl<'a> Resolver<'a> {
     pub(crate) fn resolve(&self, import: CollectedImport) -> Option<&'a FilePath> {
         match import {
             CollectedImport::Import(import) => {
-                resolve_module(self.db, &import).map(|module| module.file().path(self.db))
+                let module = resolve_module(self.db, &import)?;
+                Some(module.file()?.path(self.db))
             }
             CollectedImport::ImportFrom(import) => {
                 // Attempt to resolve the member (e.g., given `from foo import bar`, look for `foo.bar`).
                 let parent = import.parent();
 
-                resolve_module(self.db, &import)
-                    .map(|module| module.file().path(self.db))
-                    .or_else(|| {
-                        // Attempt to resolve the module (e.g., given `from foo import bar`, look for `foo`).
+                let module = resolve_module(self.db, &import).or_else(|| {
+                    // Attempt to resolve the module (e.g., given `from foo import bar`, look for `foo`).
 
-                        resolve_module(self.db, &parent?).map(|module| module.file().path(self.db))
-                    })
+                    resolve_module(self.db, &parent?)
+                })?;
+
+                Some(module.file()?.path(self.db))
             }
         }
     }

crates/ruff_linter/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_linter"
-version = "0.11.10"
+version = "0.12.0"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }

crates/ruff_linter/resources/test/fixtures/airflow/AIR301_names.py

@@ -10,22 +10,10 @@ from airflow import (
     PY312,
 )
 from airflow.api_connexion.security import requires_access
-from airflow.configuration import (
-    as_dict,
-    get,
-    getboolean,
-    getfloat,
-    getint,
-    has_option,
-    remove_option,
-    set,
-)
 from airflow.contrib.aws_athena_hook import AWSAthenaHook
 from airflow.datasets import DatasetAliasEvent
-from airflow.hooks.base_hook import BaseHook
 from airflow.operators.subdag import SubDagOperator
 from airflow.secrets.local_filesystem import LocalFilesystemBackend
-from airflow.sensors.base_sensor_operator import BaseSensorOperator
 from airflow.triggers.external_task import TaskStateTrigger
 from airflow.utils import dates
 from airflow.utils.dag_cycle_tester import test_cycle
@@ -40,13 +28,10 @@ from airflow.utils.dates import (
 )
 from airflow.utils.db import create_session
 from airflow.utils.decorators import apply_defaults
-from airflow.utils.file import TemporaryDirectory, mkdirs
-from airflow.utils.helpers import chain as helper_chain
-from airflow.utils.helpers import cross_downstream as helper_cross_downstream
-from airflow.utils.log import secrets_masker
+from airflow.utils.file import mkdirs
 from airflow.utils.state import SHUTDOWN, terminating_states
 from airflow.utils.trigger_rule import TriggerRule
-from airflow.www.auth import has_access
+from airflow.www.auth import has_access, has_access_dataset
 from airflow.www.utils import get_sensitive_variables_fields, should_hide_value_for_key
 
 # airflow root
@@ -55,11 +40,6 @@ PY36, PY37, PY38, PY39, PY310, PY311, PY312
 # airflow.api_connexion.security
 requires_access
 
-
-# airflow.configuration
-get, getboolean, getfloat, getint, has_option, remove_option, as_dict, set
-
-
 # airflow.contrib.*
 AWSAthenaHook()
 
@@ -68,10 +48,6 @@ AWSAthenaHook()
 DatasetAliasEvent()
 
 
-# airflow.hooks
-BaseHook()
-
-
 # airflow.operators.subdag.*
 SubDagOperator()
 
@@ -81,10 +57,6 @@ SubDagOperator()
 LocalFilesystemBackend()
 
 
-# airflow.sensors.base_sensor_operator
-BaseSensorOperator()
-
-
 # airflow.triggers.external_task
 TaskStateTrigger()
 
@@ -114,15 +86,8 @@ create_session
 apply_defaults
 
 # airflow.utils.file
-TemporaryDirectory()
 mkdirs
 
-#  airflow.utils.helpers
-helper_chain
-helper_cross_downstream
-
-#  airflow.utils.log
-secrets_masker
 
 # airflow.utils.state
 SHUTDOWN
@@ -135,37 +100,8 @@ TriggerRule.NONE_FAILED_OR_SKIPPED
 
 # airflow.www.auth
 has_access
+has_access_dataset
 
 # airflow.www.utils
 get_sensitive_variables_fields
 should_hide_value_for_key
-
-# airflow.operators.python
-from airflow.operators.python import get_current_context
-
-get_current_context()
-
-# airflow.providers.mysql
-from airflow.providers.mysql.datasets.mysql import sanitize_uri
-
-sanitize_uri
-
-# airflow.providers.postgres
-from airflow.providers.postgres.datasets.postgres import sanitize_uri
-
-sanitize_uri
-
-# airflow.providers.trino
-from airflow.providers.trino.datasets.trino import sanitize_uri
-
-sanitize_uri
-
-# airflow.notifications.basenotifier
-from airflow.notifications.basenotifier import BaseNotifier
-
-BaseNotifier()
-
-# airflow.auth.manager
-from airflow.auth.managers.base_auth_manager import BaseAuthManager
-
-BaseAuthManager()

crates/ruff_linter/resources/test/fixtures/airflow/AIR301_names_fix.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 from airflow.api_connexion.security import requires_access_dataset
 from airflow.auth.managers.models.resource_details import (
     DatasetDetails,
-
 )
 from airflow.datasets.manager import (
     DatasetManager,
@@ -12,15 +11,13 @@ from airflow.datasets.manager import (
 )
 from airflow.lineage.hook import DatasetLineageInfo
 from airflow.metrics.validators import AllowListValidator, BlockListValidator
-from airflow.secrets.local_filesystm import load_connections
+from airflow.secrets.local_filesystem import load_connections
 from airflow.security.permissions import RESOURCE_DATASET
-from airflow.www.auth import has_access_dataset
 
 requires_access_dataset()
 
 DatasetDetails()
 
-
 DatasetManager()
 dataset_manager()
 resolve_dataset_manager()
@@ -34,7 +31,6 @@ load_connections()
 
 RESOURCE_DATASET
 
-has_access_dataset()
 
 from airflow.listeners.spec.dataset import (
     on_dataset_changed,
@@ -43,3 +39,76 @@ from airflow.listeners.spec.dataset import (
 
 on_dataset_created()
 on_dataset_changed()
+
+
+# airflow.operators.python
+from airflow.operators.python import get_current_context
+
+get_current_context()
+
+# airflow.providers.mysql
+from airflow.providers.mysql.datasets.mysql import sanitize_uri
+
+sanitize_uri
+
+# airflow.providers.postgres
+from airflow.providers.postgres.datasets.postgres import sanitize_uri
+
+sanitize_uri
+
+# airflow.providers.trino
+from airflow.providers.trino.datasets.trino import sanitize_uri
+
+sanitize_uri
+
+# airflow.notifications.basenotifier
+from airflow.notifications.basenotifier import BaseNotifier
+
+BaseNotifier()
+
+# airflow.auth.manager
+from airflow.auth.managers.base_auth_manager import BaseAuthManager
+
+BaseAuthManager()
+
+
+from airflow.configuration import (
+    as_dict,
+    get,
+    getboolean,
+    getfloat,
+    getint,
+    has_option,
+    remove_option,
+    set,
+)
+
+# airflow.configuration
+get, getboolean, getfloat, getint, has_option, remove_option, as_dict, set
+from airflow.hooks.base_hook import BaseHook
+
+# airflow.hooks
+BaseHook()
+
+from airflow.sensors.base_sensor_operator import BaseSensorOperator
+
+# airflow.sensors.base_sensor_operator
+BaseSensorOperator()
+BaseHook()
+
+from airflow.utils.helpers import chain as helper_chain
+from airflow.utils.helpers import cross_downstream as helper_cross_downstream
+
+#  airflow.utils.helpers
+helper_chain
+helper_cross_downstream
+
+# airflow.utils.file
+from airflow.utils.file import TemporaryDirectory
+
+TemporaryDirectory()
+
+from airflow.utils.log import secrets_masker
+
+#  airflow.utils.log
+secrets_masker

crates/ruff_linter/resources/test/fixtures/airflow/AIR301_provider_names_fix.py

@@ -1,54 +1,54 @@
 from __future__ import annotations
 
 from airflow.providers.amazon.aws.auth_manager.avp.entities import AvpEntities
+from airflow.providers.openlineage.utils.utils import (
+    DatasetInfo,
+    translate_airflow_dataset,
+)
+from airflow.secrets.local_filesystem import load_connections
+from airflow.security.permissions import RESOURCE_DATASET
+
+AvpEntities.DATASET
+
+# airflow.providers.openlineage.utils.utils
+DatasetInfo()
+translate_airflow_dataset()
+
+# airflow.secrets.local_filesystem
+load_connections()
+
+# airflow.security.permissions
+RESOURCE_DATASET
+
 from airflow.providers.amazon.aws.datasets.s3 import (
     convert_dataset_to_openlineage as s3_convert_dataset_to_openlineage,
 )
 from airflow.providers.amazon.aws.datasets.s3 import create_dataset as s3_create_dataset
+
+s3_create_dataset()
+s3_convert_dataset_to_openlineage()
+
 from airflow.providers.common.io.dataset.file import (
     convert_dataset_to_openlineage as io_convert_dataset_to_openlineage,
 )
 from airflow.providers.common.io.dataset.file import create_dataset as io_create_dataset
 
-from airflow.providers.google.datasets.bigquery import (
-    create_dataset as bigquery_create_dataset,
-)
-from airflow.providers.google.datasets.gcs import (
-    convert_dataset_to_openlineage as gcs_convert_dataset_to_openlineage,
-)
-from airflow.providers.google.datasets.gcs import create_dataset as gcs_create_dataset
-from airflow.providers.openlineage.utils.utils import (
-    DatasetInfo,
-    translate_airflow_dataset,
-)
-
-AvpEntities.DATASET
-
-s3_create_dataset()
-s3_convert_dataset_to_openlineage()
-
 io_create_dataset()
 io_convert_dataset_to_openlineage()
 
 
+# # airflow.providers.google.datasets.bigquery
+from airflow.providers.google.datasets.bigquery import (
+    create_dataset as bigquery_create_dataset,
+)
 
-# airflow.providers.google.datasets.bigquery
 bigquery_create_dataset()
+
 # airflow.providers.google.datasets.gcs
+from airflow.providers.google.datasets.gcs import (
+    convert_dataset_to_openlineage as gcs_convert_dataset_to_openlineage,
+)
+from airflow.providers.google.datasets.gcs import create_dataset as gcs_create_dataset
+
 gcs_create_dataset()
 gcs_convert_dataset_to_openlineage()
-# airflow.providers.openlineage.utils.utils
-DatasetInfo()
-translate_airflow_dataset()
-#
-# airflow.secrets.local_filesystem
-load_connections()
-#
-# airflow.security.permissions
-RESOURCE_DATASET
-
-# airflow.timetables
-DatasetTriggeredTimetable()
-#
-# airflow.www.auth
-has_access_dataset

crates/ruff_linter/resources/test/fixtures/airflow/AIR302_amazon.py

@@ -5,35 +5,30 @@ from airflow.hooks.S3_hook import (
     provide_bucket_name,
 )
 from airflow.operators.gcs_to_s3 import GCSToS3Operator
-from airflow.operators.google_api_to_s3_transfer import (
-    GoogleApiToS3Operator,
-    GoogleApiToS3Transfer,
-)
-from airflow.operators.redshift_to_s3_operator import (
-    RedshiftToS3Operator,
-    RedshiftToS3Transfer,
-)
+from airflow.operators.google_api_to_s3_transfer import GoogleApiToS3Operator
+from airflow.operators.redshift_to_s3_operator import RedshiftToS3Operator
 from airflow.operators.s3_file_transform_operator import S3FileTransformOperator
-from airflow.operators.s3_to_redshift_operator import (
-    S3ToRedshiftOperator,
-    S3ToRedshiftTransfer,
-)
+from airflow.operators.s3_to_redshift_operator import S3ToRedshiftOperator
 from airflow.sensors.s3_key_sensor import S3KeySensor
 
 S3Hook()
 provide_bucket_name()
 
 GCSToS3Operator()
-
 GoogleApiToS3Operator()
+RedshiftToS3Operator()
+S3FileTransformOperator()
+S3ToRedshiftOperator()
+S3KeySensor()
+
+from airflow.operators.google_api_to_s3_transfer import GoogleApiToS3Transfer
+
 GoogleApiToS3Transfer()
 
-RedshiftToS3Operator()
+from airflow.operators.redshift_to_s3_operator import RedshiftToS3Transfer
+
 RedshiftToS3Transfer()
 
-S3FileTransformOperator()
+from airflow.operators.s3_to_redshift_operator import S3ToRedshiftTransfer
 
-S3ToRedshiftOperator()
 S3ToRedshiftTransfer()
-
-S3KeySensor()

crates/ruff_linter/resources/test/fixtures/airflow/AIR302_common_sql.py

@@ -4,10 +4,13 @@ from airflow.hooks.dbapi import (
     ConnectorProtocol,
     DbApiHook,
 )
+
+ConnectorProtocol()
+DbApiHook()
+
 from airflow.hooks.dbapi_hook import DbApiHook
 from airflow.operators.check_operator import SQLCheckOperator
 
-ConnectorProtocol()
 DbApiHook()
 SQLCheckOperator()
 
@@ -114,16 +117,11 @@ from airflow.sensors.sql_sensor import SqlSensor
 SqlSensor()
 
 
-from airflow.operators.jdbc_operator import JdbcOperator
-from airflow.operators.mssql_operator import MsSqlOperator
-from airflow.operators.mysql_operator import MySqlOperator
-from airflow.operators.oracle_operator import OracleOperator
-from airflow.operators.postgres_operator import PostgresOperator
-from airflow.operators.sqlite_operator import SqliteOperator
+from airflow.providers.common.sql.operators.sql import SQLExecuteQueryOperator
 
-JdbcOperator()
-MsSqlOperator()
-MySqlOperator()
-OracleOperator()
-PostgresOperator()
-SqliteOperator()
+SQLExecuteQueryOperator()
+SQLExecuteQueryOperator()
+SQLExecuteQueryOperator()
+SQLExecuteQueryOperator()
+SQLExecuteQueryOperator()
+SQLExecuteQueryOperator()

crates/ruff_linter/resources/test/fixtures/airflow/AIR302_hive.py

@@ -12,55 +12,59 @@ from airflow.macros.hive import (
 )
 from airflow.operators.hive_operator import HiveOperator
 from airflow.operators.hive_stats_operator import HiveStatsCollectionOperator
-from airflow.operators.hive_to_mysql import (
-    HiveToMySqlOperator,
-    HiveToMySqlTransfer,
-)
+from airflow.operators.hive_to_mysql import HiveToMySqlOperator
 from airflow.operators.hive_to_samba_operator import HiveToSambaOperator
-from airflow.operators.mssql_to_hive import (
-    MsSqlToHiveOperator,
-    MsSqlToHiveTransfer,
-)
-from airflow.operators.mysql_to_hive import (
-    MySqlToHiveOperator,
-    MySqlToHiveTransfer,
-)
-from airflow.operators.s3_to_hive_operator import (
-    S3ToHiveOperator,
-    S3ToHiveTransfer,
-)
-from airflow.sensors.hive_partition_sensor import HivePartitionSensor
-from airflow.sensors.metastore_partition_sensor import MetastorePartitionSensor
-from airflow.sensors.named_hive_partition_sensor import NamedHivePartitionSensor
+
+HIVE_QUEUE_PRIORITIES
+HiveCliHook()
+HiveMetastoreHook()
+HiveServer2Hook()
 
 closest_ds_partition()
 max_partition()
 
-HiveCliHook()
-HiveMetastoreHook()
-HiveServer2Hook()
-HIVE_QUEUE_PRIORITIES
-
 HiveOperator()
-
 HiveStatsCollectionOperator()
-
 HiveToMySqlOperator()
-HiveToMySqlTransfer()
-
 HiveToSambaOperator()
 
-MsSqlToHiveOperator()
-MsSqlToHiveTransfer()
+
+from airflow.operators.hive_to_mysql import HiveToMySqlTransfer
+
+HiveToMySqlTransfer()
+
+from airflow.operators.mysql_to_hive import MySqlToHiveOperator
 
 MySqlToHiveOperator()
+
+from airflow.operators.mysql_to_hive import MySqlToHiveTransfer
+
 MySqlToHiveTransfer()
 
+from airflow.operators.mssql_to_hive import MsSqlToHiveOperator
+
+MsSqlToHiveOperator()
+
+from airflow.operators.mssql_to_hive import MsSqlToHiveTransfer
+
+MsSqlToHiveTransfer()
+
+from airflow.operators.s3_to_hive_operator import S3ToHiveOperator
+
 S3ToHiveOperator()
+
+from airflow.operators.s3_to_hive_operator import S3ToHiveTransfer
+
 S3ToHiveTransfer()
 
+from airflow.sensors.hive_partition_sensor import HivePartitionSensor
+
 HivePartitionSensor()
 
+from airflow.sensors.metastore_partition_sensor import MetastorePartitionSensor
+
 MetastorePartitionSensor()
 
+from airflow.sensors.named_hive_partition_sensor import NamedHivePartitionSensor
+
 NamedHivePartitionSensor()

crates/ruff_linter/resources/test/fixtures/airflow/AIR302_kubernetes.py

@@ -16,14 +16,7 @@ from airflow.kubernetes.kube_client import (
 from airflow.kubernetes.kubernetes_helper_functions import (
     add_pod_suffix,
     annotations_for_logging_task_metadata,
-    annotations_to_key,
     create_pod_id,
-    get_logs_task_metadata,
-    rand_str,
-)
-from airflow.kubernetes.pod import (
-    Port,
-    Resources,
 )
 
 ALL_NAMESPACES
@@ -37,21 +30,13 @@ _enable_tcp_keepalive()
 get_kube_client()
 
 add_pod_suffix()
-create_pod_id()
-
 annotations_for_logging_task_metadata()
-annotations_to_key()
-get_logs_task_metadata()
-rand_str()
-
-Port()
-Resources()
+create_pod_id()
 
 
 from airflow.kubernetes.pod_generator import (
     PodDefaults,
     PodGenerator,
-    PodGeneratorDeprecated,
     add_pod_suffix,
     datetime_to_label_safe_datestring,
     extend_object_field,
@@ -61,18 +46,16 @@ from airflow.kubernetes.pod_generator import (
     rand_str,
 )
 
+PodDefaults()
+PodGenerator()
+add_pod_suffix()
 datetime_to_label_safe_datestring()
 extend_object_field()
 label_safe_datestring_to_datetime()
 make_safe_label_value()
 merge_objects()
-PodGenerator()
-PodDefaults()
-PodGeneratorDeprecated()
-add_pod_suffix()
 rand_str()
 
-
 from airflow.kubernetes.pod_generator_deprecated import (
     PodDefaults,
     PodGenerator,
@@ -90,7 +73,6 @@ make_safe_label_value()
 PodLauncher()
 PodStatus()
 
-
 from airflow.kubernetes.pod_launcher_deprecated import (
     PodDefaults,
     PodLauncher,
@@ -115,3 +97,17 @@ K8SModel()
 Secret()
 Volume()
 VolumeMount()
+
+from airflow.kubernetes.kubernetes_helper_functions import (
+    annotations_to_key,
+    get_logs_task_metadata,
+    rand_str,
+)
+
+annotations_to_key()
+get_logs_task_metadata()
+rand_str()
+
+from airflow.kubernetes.pod_generator import PodGeneratorDeprecated
+
+PodGeneratorDeprecated()

crates/ruff_linter/resources/test/fixtures/airflow/AIR302_standard.py

@@ -5,10 +5,6 @@ from airflow.operators.dagrun_operator import (
     TriggerDagRunLink,
     TriggerDagRunOperator,
 )
-from airflow.operators.dummy import (
-    DummyOperator,
-    EmptyOperator,
-)
 from airflow.operators.latest_only_operator import LatestOnlyOperator
 from airflow.operators.python_operator import (
     BranchPythonOperator,
@@ -19,15 +15,12 @@ from airflow.operators.python_operator import (
 from airflow.sensors.external_task_sensor import (
     ExternalTaskMarker,
     ExternalTaskSensor,
-    ExternalTaskSensorLink,
 )
 
 BashOperator()
 
 TriggerDagRunLink()
 TriggerDagRunOperator()
-DummyOperator()
-EmptyOperator()
 
 LatestOnlyOperator()
 
@@ -38,25 +31,48 @@ ShortCircuitOperator()
 
 ExternalTaskMarker()
 ExternalTaskSensor()
-ExternalTaskSensorLink()
 
-from airflow.operators.dummy_operator import (
-    DummyOperator,
-    EmptyOperator,
-)
-
-DummyOperator()
-EmptyOperator()
 
 from airflow.hooks.subprocess import SubprocessResult
+
 SubprocessResult()
+
 from airflow.hooks.subprocess import working_directory
+
 working_directory()
+
 from airflow.operators.datetime import target_times_as_dates
+
 target_times_as_dates()
+
 from airflow.operators.trigger_dagrun import TriggerDagRunLink
+
 TriggerDagRunLink()
+
 from airflow.sensors.external_task import ExternalTaskSensorLink
+
 ExternalTaskSensorLink()
+
 from airflow.sensors.time_delta import WaitSensor
-WaitSensor()
+
+WaitSensor()
+
+from airflow.operators.dummy import DummyOperator
+
+DummyOperator()
+
+from airflow.operators.dummy import EmptyOperator
+
+EmptyOperator()
+
+from airflow.operators.dummy_operator import DummyOperator
+
+DummyOperator()
+
+from airflow.operators.dummy_operator import EmptyOperator
+
+EmptyOperator()
+
+from airflow.sensors.external_task_sensor import ExternalTaskSensorLink
+
+ExternalTaskSensorLink()

crates/ruff_linter/resources/test/fixtures/airflow/AIR311_names.py

@@ -9,19 +9,12 @@ from airflow.datasets import (
     expand_alias_to_datasets,
 )
 from airflow.datasets.metadata import Metadata
-from airflow.decorators import dag, setup, task, task_group, teardown
-from airflow.io.path import ObjectStoragePath
-from airflow.io.storage import attach
-from airflow.models import DAG as DAGFromModel
-from airflow.models import (
-    Connection,
-    Variable,
+from airflow.decorators import (
+    dag,
+    setup,
+    task,
+    task_group,
 )
-from airflow.models.baseoperator import chain, chain_linear, cross_downstream
-from airflow.models.baseoperatorlink import BaseOperatorLink
-from airflow.models.dag import DAG as DAGFromDag
-from airflow.timetables.datasets import DatasetOrTimeSchedule
-from airflow.utils.dag_parsing_context import get_parsing_context
 
 # airflow
 DatasetFromRoot()
@@ -39,9 +32,22 @@ dag()
 task()
 task_group()
 setup()
+from airflow.decorators import teardown
+from airflow.io.path import ObjectStoragePath
+from airflow.io.storage import attach
+from airflow.models import DAG as DAGFromModel
+from airflow.models import (
+    Connection,
+    Variable,
+)
+from airflow.models.baseoperator import chain, chain_linear, cross_downstream
+from airflow.models.baseoperatorlink import BaseOperatorLink
+from airflow.models.dag import DAG as DAGFromDag
+
+# airflow.decorators
 teardown()
 
-# airflow.io
+# # airflow.io
 ObjectStoragePath()
 attach()
 
@@ -60,6 +66,9 @@ BaseOperatorLink()
 
 # airflow.models.dag
 DAGFromDag()
+from airflow.timetables.datasets import DatasetOrTimeSchedule
+from airflow.utils.dag_parsing_context import get_parsing_context
+
 # airflow.timetables.datasets
 DatasetOrTimeSchedule()
 

crates/ruff_linter/resources/test/fixtures/airflow/AIR312.py

@@ -7,49 +7,71 @@ from airflow.operators.bash import BashOperator
 from airflow.operators.datetime import BranchDateTimeOperator
 from airflow.operators.empty import EmptyOperator
 from airflow.operators.latest_only import LatestOnlyOperator
+from airflow.operators.trigger_dagrun import TriggerDagRunOperator
+from airflow.operators.weekday import BranchDayOfWeekOperator
+from airflow.sensors.date_time import DateTimeSensor
+
+FSHook()
+PackageIndexHook()
+SubprocessHook()
+
+BashOperator()
+BranchDateTimeOperator()
+TriggerDagRunOperator()
+EmptyOperator()
+
+LatestOnlyOperator()
+BranchDayOfWeekOperator()
+DateTimeSensor()
+
 from airflow.operators.python import (
     BranchPythonOperator,
     PythonOperator,
     PythonVirtualenvOperator,
     ShortCircuitOperator,
 )
-from airflow.operators.trigger_dagrun import TriggerDagRunOperator
-from airflow.operators.weekday import BranchDayOfWeekOperator
-from airflow.sensors.date_time import DateTimeSensor, DateTimeSensorAsync
+from airflow.sensors.date_time import DateTimeSensorAsync
 from airflow.sensors.external_task import (
     ExternalTaskMarker,
     ExternalTaskSensor,
-
+)
+from airflow.sensors.time_sensor import (
+    TimeSensor,
+    TimeSensorAsync,
 )
 from airflow.sensors.filesystem import FileSensor
-from airflow.sensors.time_delta import TimeDeltaSensor, TimeDeltaSensorAsync
-from airflow.sensors.time_sensor import TimeSensor, TimeSensorAsync
-from airflow.sensors.weekday import DayOfWeekSensor
-from airflow.triggers.external_task import DagStateTrigger, WorkflowTrigger
-from airflow.triggers.file import FileTrigger
-from airflow.triggers.temporal import DateTimeTrigger, TimeDeltaTrigger
 
-FSHook()
-PackageIndexHook()
-SubprocessHook()
-BashOperator()
-BranchDateTimeOperator()
-TriggerDagRunOperator()
-EmptyOperator()
-LatestOnlyOperator()
-(
-    BranchPythonOperator(),
-    PythonOperator(),
-    PythonVirtualenvOperator(),
-    ShortCircuitOperator(),
-)
-BranchDayOfWeekOperator()
-DateTimeSensor(), DateTimeSensorAsync()
-ExternalTaskMarker(), ExternalTaskSensor()
+BranchPythonOperator()
+PythonOperator()
+PythonVirtualenvOperator()
+ShortCircuitOperator()
+DateTimeSensorAsync()
+ExternalTaskMarker()
+ExternalTaskSensor()
 FileSensor()
-TimeSensor(), TimeSensorAsync()
-TimeDeltaSensor(), TimeDeltaSensorAsync()
+TimeSensor()
+TimeSensorAsync()
+
+from airflow.sensors.time_delta import (
+    TimeDeltaSensor,
+    TimeDeltaSensorAsync,
+)
+from airflow.sensors.weekday import DayOfWeekSensor
+from airflow.triggers.external_task import (
+    DagStateTrigger,
+    WorkflowTrigger,
+)
+from airflow.triggers.file import FileTrigger
+from airflow.triggers.temporal import (
+    DateTimeTrigger,
+    TimeDeltaTrigger,
+)
+
+TimeDeltaSensor()
+TimeDeltaSensorAsync()
 DayOfWeekSensor()
-DagStateTrigger(), WorkflowTrigger()
+DagStateTrigger()
+WorkflowTrigger()
 FileTrigger()
-DateTimeTrigger(), TimeDeltaTrigger()
+DateTimeTrigger()
+TimeDeltaTrigger()

crates/ruff_linter/resources/test/fixtures/fastapi/FAST003.py

@@ -178,3 +178,38 @@ async def unknown_1(other: str = Depends(unknown_unresolved)): ...
 async def unknown_2(other: str = Depends(unknown_not_function)): ...
 @app.get("/things/{thing_id}")
 async def unknown_3(other: str = Depends(unknown_imported)): ...
+
+
+# Class dependencies
+from pydantic import BaseModel
+from dataclasses import dataclass
+
+class PydanticParams(BaseModel):
+    my_id: int
+
+
+class InitParams:
+    def __init__(self, my_id: int):
+        self.my_id = my_id
+
+
+# Errors
+@app.get("/{id}")
+async def get_id_pydantic_full(
+    params: Annotated[PydanticParams, Depends(PydanticParams)],
+): ...
+@app.get("/{id}")
+async def get_id_pydantic_short(params: Annotated[PydanticParams, Depends()]): ...
+@app.get("/{id}")
+async def get_id_init_not_annotated(params = Depends(InitParams)): ...
+
+
+# No errors
+@app.get("/{my_id}")
+async def get_id_pydantic_full(
+    params: Annotated[PydanticParams, Depends(PydanticParams)],
+): ...
+@app.get("/{my_id}")
+async def get_id_pydantic_short(params: Annotated[PydanticParams, Depends()]): ...
+@app.get("/{my_id}")
+async def get_id_init_not_annotated(params = Depends(InitParams)): ...

crates/ruff_linter/resources/test/fixtures/flake8_async/ASYNC115.py

@@ -145,3 +145,23 @@ def func():
             sleep = 10
 
     anyio.run(main)
+
+
+async def test_anyio_async115_helpers():
+    import anyio
+
+    await anyio.sleep(delay=1)  # OK
+    await anyio.sleep(seconds=1)  # OK
+
+    await anyio.sleep(delay=0)  # ASYNC115
+    await anyio.sleep(seconds=0)  # OK
+
+
+async def test_trio_async115_helpers():
+    import trio
+
+    await trio.sleep(seconds=1)  # OK
+    await trio.sleep(delay=1)  # OK
+
+    await trio.sleep(seconds=0)  # ASYNC115
+    await trio.sleep(delay=0)  # OK

crates/ruff_linter/resources/test/fixtures/flake8_async/ASYNC116.py

@@ -108,3 +108,23 @@ async def import_from_anyio():
 
     # catch from import
     await sleep(86401)  # error: 116, "async"
+
+
+async def test_anyio_async116_helpers():
+    import anyio
+
+    await anyio.sleep(delay=1)  # OK
+    await anyio.sleep(seconds=1)  # OK
+
+    await anyio.sleep(delay=86401)  # ASYNC116
+    await anyio.sleep(seconds=86401)  # OK
+
+
+async def test_trio_async116_helpers():
+    import trio
+
+    await trio.sleep(seconds=1)  # OK
+    await trio.sleep(delay=1)  # OK
+
+    await trio.sleep(seconds=86401)  # ASYNC116
+    await trio.sleep(delay=86401)  # OK

crates/ruff_linter/resources/test/fixtures/flake8_bandit/S104.py

@@ -22,3 +22,8 @@ def my_func():
 
 # Implicit string concatenation
 "0.0.0.0" f"0.0.0.0{expr}0.0.0.0"
+
+# t-strings - all ok
+t"0.0.0.0"
+"0.0.0.0" t"0.0.0.0{expr}0.0.0.0"
+"0.0.0.0" f"0.0.0.0{expr}0.0.0.0" t"0.0.0.0{expr}0.0.0.0"

crates/ruff_linter/resources/test/fixtures/flake8_bandit/S108.py

@@ -40,3 +40,7 @@ with tempfile.TemporaryDirectory(dir="/dev/shm") as d:
 
 with TemporaryDirectory(dir="/tmp") as d:
     pass
+
+# ok (runtime error from t-string)
+with open(t"/foo/bar", "w") as f:
+    f.write("def")

crates/ruff_linter/resources/test/fixtures/flake8_bandit/S608.py

@@ -169,3 +169,13 @@ query60 = f"""
 
 # https://github.com/astral-sh/ruff/issues/17967
 query61 = f"SELECT * FROM table" # skip expressionless f-strings
+
+# t-strings
+query62 = t"SELECT * FROM table"
+query63 = t"""
+    SELECT *,
+        foo
+    FROM ({user_input}) raw
+"""
+query64 = f"update {t"{table}"} set var = {t"{var}"}"
+query65 = t"update {f"{table}"} set var = {f"{var}"}"

crates/ruff_linter/resources/test/fixtures/flake8_bugbear/B009_B010.py

@@ -67,3 +67,6 @@ getattr(self.
 
 import builtins
 builtins.getattr(foo, "bar")
+
+# Regression test for: https://github.com/astral-sh/ruff/issues/18353
+setattr(foo, "__debug__", 0)

crates/ruff_linter/resources/test/fixtures/flake8_bugbear/B909.py

@@ -179,3 +179,17 @@ def func():
     for elem in some_list:
         if some_list.pop() == 2:
             return
+
+# should not error - direct return with mutation (Issue #18399)
+def fail_map(mapping):
+    for key in mapping:
+        return mapping.pop(key)
+
+def success_map(mapping):
+    for key in mapping:
+        ret = mapping.pop(key)  # should not error
+        return ret
+
+def fail_list(seq):
+    for val in seq:
+        return seq.pop(4)

crates/ruff_linter/resources/test/fixtures/flake8_implicit_str_concat/ISC.py

@@ -91,3 +91,99 @@ _ = "\8""0" # fix should be "\80"
 _ = "\12""8" # fix should be "\128"
 _ = "\12""foo" # fix should be "\12foo"
 _ = "\12" ""  # fix should be "\12"
+
+
+# Mixed literal + non-literal scenarios
+_ = (
+    "start" +
+    variable +
+    "end"
+)
+
+_ = (
+    f"format" +
+    func_call() +
+    "literal"
+)
+
+_ = (
+    rf"raw_f{x}" +
+    r"raw_normal"
+)
+
+
+# Different prefix combinations
+_ = (
+    u"unicode" +
+    r"raw"
+)
+
+_ = (
+    rb"raw_bytes" +
+    b"normal_bytes"
+)
+
+_ = (
+    b"bytes" +
+    b"with_bytes"
+)
+
+# Repeated concatenation
+
+_ = ("a" +
+    "b" +
+    "c" +
+    "d" + "e"
+)
+
+_ = ("a"
+    + "b"
+    + "c"
+    + "d"
+    + "e"
+)
+
+_ = (
+    "start" +
+    variable + # comment
+    "end"
+)
+
+_ = (
+    "start" +
+    variable
+		# leading comment
+    + "end"
+)
+
+_ = (
+    "first"
+    +    "second"  # extra spaces around +
+)
+
+_ = (
+    "first"    +  # trailing spaces before +
+    "second"
+)
+
+_ = ((
+    "deep" +
+    "nesting"
+))
+
+_ = (
+    "contains + plus" +
+    "another string"
+)
+
+_ = (
+    "start"
+		# leading comment
+    + "end"
+)
+
+_ = (
+    "start" +
+		# leading comment
+    "end"
+)

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI019_0.py

@@ -181,3 +181,34 @@ MetaType = TypeVar("MetaType")
 class MetaTestClass(type):
     def m(cls: MetaType) -> MetaType:
         return cls
+
+
+from __future__ import annotations
+
+class BadClassWithStringTypeHints:
+    def bad_instance_method_with_string_annotations(self: "_S", arg: str) -> "_S": ... # PYI019
+
+    @classmethod
+    def bad_class_method_with_string_annotations(cls: "type[_S]") -> "_S": ... # PYI019
+
+
+    @classmethod
+    def bad_class_method_with_mixed_annotations_1(cls: "type[_S]") -> _S: ... # PYI019
+
+
+    @classmethod
+    def bad_class_method_with_mixed_annotations_1(cls: type[_S]) -> "_S": ... # PYI019
+
+
+class BadSubscriptReturnTypeWithStringTypeHints:
+    @classmethod
+    def m[S](cls: "type[S]") -> "type[S]": ...  # PYI019
+
+
+class GoodClassWiStringTypeHints:
+    @classmethod
+    def good_cls_method_with_mixed_annotations(cls: "type[Self]", arg: str) -> Self: ...
+    @staticmethod
+    def good_static_method_with_string_annotations(arg: "_S") -> "_S": ...
+    @classmethod
+    def good_class_method_with_args_string_annotations(cls, arg1: "_S", arg2: "_S") -> "_S": ...

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI019_0.pyi

@@ -172,3 +172,36 @@ MetaType = TypeVar("MetaType")
 class MetaTestClass(type):
     def m(cls: MetaType) -> MetaType:
         return cls
+
+
+from __future__ import annotations
+
+
+class BadClassWithStringTypeHints:
+    def bad_instance_method_with_string_annotations(self: "_S", arg: str) -> "_S": ... # PYI019
+
+    @classmethod
+    def bad_class_method_with_string_annotations(cls: "type[_S]") -> "_S": ... # PYI019
+
+
+    @classmethod
+    def bad_class_method_with_mixed_annotations_1(cls: "type[_S]") -> _S: ... # PYI019
+
+
+    @classmethod
+    def bad_class_method_with_mixed_annotations_1(cls: type[_S]) -> "_S": ... # PYI019
+
+
+class BadSubscriptReturnTypeWithStringTypeHints:
+    @classmethod
+    def m[S](cls: "type[S]") -> "type[S]": ...  # PYI019
+
+
+class GoodClassWithStringTypeHints:
+    @classmethod
+    def good_cls_method_with_mixed_annotations(cls: "type[Self]", arg: str) -> Self: ...
+    @staticmethod
+    def good_static_method_with_string_annotations(arg: "_S") -> "_S": ...
+    @classmethod
+    def good_class_method_with_args_string_annotations(cls, arg1: "_S", arg2: "_S") -> "_S": ...
+

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI053.py

@@ -72,3 +72,5 @@ def not_warnings_dot_deprecated(
 
 @not_warnings_dot_deprecated("Not warnings.deprecated, so this one *should* lead to PYI053 in a stub!")
 def not_a_deprecated_function() -> None: ...
+
+baz: str = t"51 character stringgggggggggggggggggggggggggggggggg"

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI053.pyi

@@ -80,3 +80,7 @@ x: TypeAlias = Literal["fooooooooooooooooooooooooooooooooooooooooooooooooooooooo
 
 # Ok
 y: TypeAlias = Annotated[int, "metadataaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"]
+
+ttoo: str = t"50 character stringggggggggggggggggggggggggggggggg"  # OK
+
+tbar: str = t"51 character stringgggggggggggggggggggggggggggggggg"  # Error: PYI053

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI059.py

@@ -52,3 +52,15 @@ class MyList(Sized, Generic[T]):  # Generic already in last place
 
 class SomeGeneric(Generic[T]):  # Only one generic
     pass
+
+
+# syntax errors with starred and keyword arguments from
+# https://github.com/astral-sh/ruff/issues/18602
+class C1(Generic[T], str, **{"metaclass": type}):  # PYI059
+    ...
+
+class C2(Generic[T], str, metaclass=type):  # PYI059
+    ...
+
+class C3(Generic[T], metaclass=type, *[str]):  # PYI059 but no fix
+    ...

crates/ruff_linter/resources/test/fixtures/flake8_quotes/doubles_escaped.py

@@ -39,3 +39,27 @@ f'\'normal\' {f'nested'} normal'  # Q003
 f'\'normal\' {f'nested'} "double quotes"'
 f'\'normal\' {f'\'nested\' {'other'} normal'} "double quotes"'  # Q003
 f'\'normal\' {f'\'nested\' {'other'} "double quotes"'} normal'  # Q00l
+
+
+
+# Same as above, but with t-strings
+t'This is a \'string\''  # Q003
+t'This is \\ a \\\'string\''  # Q003
+t'"This" is a \'string\''
+f"This is a 'string'"
+f"\"This\" is a 'string'"
+fr'This is a \'string\''
+fR'This is a \'string\''
+foo = (
+    t'This is a'
+    t'\'string\''  # Q003
+)
+t'\'foo\' {'nested'}'  # Q003
+t'\'foo\' {t'nested'}'  # Q003
+t'\'foo\' {t'\'nested\''} \'\''  # Q003
+
+t'normal {t'nested'} normal'
+t'\'normal\' {t'nested'} normal'  # Q003
+t'\'normal\' {t'nested'} "double quotes"'
+t'\'normal\' {t'\'nested\' {'other'} normal'} "double quotes"'  # Q003
+t'\'normal\' {t'\'nested\' {'other'} "double quotes"'} normal'  # Q00l

crates/ruff_linter/resources/test/fixtures/flake8_quotes/singles_escaped.py

@@ -37,3 +37,25 @@ f"\"normal\" {f"nested"} normal"  # Q003
 f"\"normal\" {f"nested"} 'single quotes'"
 f"\"normal\" {f"\"nested\" {"other"} normal"} 'single quotes'"  # Q003
 f"\"normal\" {f"\"nested\" {"other"} 'single quotes'"} normal"  # Q003
+
+
+# Same as above, but with t-strings
+t"This is a \"string\""
+t"'This' is a \"string\""
+f'This is a "string"'
+f'\'This\' is a "string"'
+fr"This is a \"string\""
+fR"This is a \"string\""
+foo = (
+    t"This is a"
+    t"\"string\""
+)
+t"\"foo\" {"foo"}"  # Q003
+t"\"foo\" {t"foo"}"  # Q003
+t"\"foo\" {t"\"foo\""} \"\""  # Q003
+
+t"normal {t"nested"} normal"
+t"\"normal\" {t"nested"} normal"  # Q003
+t"\"normal\" {t"nested"} 'single quotes'"
+t"\"normal\" {t"\"nested\" {"other"} normal"} 'single quotes'"  # Q003
+t"\"normal\" {t"\"nested\" {"other"} 'single quotes'"} normal"  # Q003

crates/ruff_linter/resources/test/fixtures/flake8_return/RET504.py

@@ -421,3 +421,14 @@ def func(a: dict[str, int]) -> list[dict[str, int]]:
     if "services" in a:
         services = a["services"]
         return services
+
+# See: https://github.com/astral-sh/ruff/issues/18411
+def f():
+    (#=
+    x) = 1
+    return x
+
+def f():
+    x = (1
+              )
+    return x

crates/ruff_linter/resources/test/fixtures/flake8_use_pathlib/PTH211.py

@@ -0,0 +1,15 @@
+import os
+from pathlib import Path
+
+
+os.symlink("usr/bin/python", "tmp/python")
+os.symlink(b"usr/bin/python", b"tmp/python")
+Path("tmp/python").symlink_to("usr/bin/python")  # Ok
+
+os.symlink("usr/bin/python", "tmp/python", target_is_directory=True)
+os.symlink(b"usr/bin/python", b"tmp/python", target_is_directory=True)
+Path("tmp/python").symlink_to("usr/bin/python", target_is_directory=True)  # Ok
+
+fd = os.open(".", os.O_RDONLY)
+os.symlink("source.txt", "link.txt", dir_fd=fd)  # Ok: dir_fd is not supported by pathlib
+os.close(fd)

crates/ruff_linter/resources/test/fixtures/pep8_naming/N804.py

@@ -81,3 +81,9 @@ foo = {}
 class Bar(type(foo)):
     def foo_method(self):
         pass
+
+# https://github.com/astral-sh/ruff/issues/18459
+class Example:
+    @classmethod
+    def function(this):
+        cls = 1234

crates/ruff_linter/resources/test/fixtures/pep8_naming/N805.py

@@ -134,3 +134,9 @@ class MyMeta(type):
 
 class MyProtocolMeta(type(Protocol)):
     def __subclasscheck__(cls, other): ...
+
+
+# https://github.com/astral-sh/ruff/issues/18459
+class C:
+    def f(this):
+        self = 123

crates/ruff_linter/resources/test/fixtures/perflint/PERF401.py

@@ -266,3 +266,15 @@ def f():
     result = list()  # this should be replaced with a comprehension
     for i in values:
         result.append(i + 1)  # PERF401
+
+def f():
+    src = [1]
+    dst = []
+
+    for i in src:
+        if True if True else False:
+            dst.append(i)
+
+    for i in src:
+        if lambda: 0:
+            dst.append(i)

crates/ruff_linter/resources/test/fixtures/perflint/PERF403.py

@@ -151,3 +151,16 @@ def foo():
     result = {}
     for idx, name in indices, fruit:
         result[name] = idx  # PERF403
+
+
+def foo():
+    src = (("x", 1),)
+    dst = {}
+
+    for k, v in src:
+        if True if True else False:
+            dst[k] = v
+
+    for k, v in src:
+        if lambda: 0:
+            dst[k] = v

crates/ruff_linter/resources/test/fixtures/pycodestyle/E731.py

@@ -176,4 +176,17 @@ x = lambda: (
 x = lambda: (
     # comment
     y := 10
-)
+)
+
+# https://github.com/astral-sh/ruff/issues/18475
+foo_tooltip = (
+    lambda x, data: f"\nfoo: {data['foo'][int(x)]}"
+    if data["foo"] is not None
+    else ""
+)
+
+foo_tooltip = (
+    lambda x, data: f"\nfoo: {data['foo'][int(x)]}" +
+    more
+
+)

crates/ruff_linter/resources/test/fixtures/pycodestyle/W605_1.py

@@ -1,4 +1,4 @@
-# Same as `W605_0.py` but using f-strings instead.
+# Same as `W605_0.py` but using f-strings and t-strings instead.
 
 #: W605:1:10
 regex = f'\.png$'
@@ -66,3 +66,72 @@ s = f"TOTAL: {total}\nOK: {ok}\INCOMPLETE: {incomplete}\n"
 
 # Debug text (should trigger)
 t = f"{'\InHere'=}"
+
+
+
+#: W605:1:10
+regex = t'\.png$'
+
+#: W605:2:1
+regex = t'''
+\.png$
+'''
+
+#: W605:2:6
+f(
+    t'\_'
+)
+
+#: W605:4:6
+t"""
+multi-line
+literal
+with \_ somewhere
+in the middle
+"""
+
+#: W605:1:38
+value = t'new line\nand invalid escape \_ here'
+
+
+#: Okay
+regex = fr'\.png$'
+regex = t'\\.png$'
+regex = fr'''
+\.png$
+'''
+regex = fr'''
+\\.png$
+'''
+s = t'\\'
+regex = t'\w'  # noqa
+regex = t'''
+\w
+'''  # noqa
+
+regex = t'\\\_'
+value = t'\{{1}}'
+value = t'\{1}'
+value = t'{1:\}'
+value = t"{t"\{1}"}"
+value = rt"{t"\{1}"}"
+
+# Okay
+value = rt'\{{1}}'
+value = rt'\{1}'
+value = rt'{1:\}'
+value = t"{rt"\{1}"}"
+
+# Regression tests for https://github.com/astral-sh/ruff/issues/10434
+t"{{}}+-\d"
+t"\n{{}}+-\d+"
+t"\n{{}}<7D>+-\d+"
+
+# See https://github.com/astral-sh/ruff/issues/11491
+total = 10
+ok = 7
+incomplete = 3
+s = t"TOTAL: {total}\nOK: {ok}\INCOMPLETE: {incomplete}\n"
+
+# Debug text (should trigger)
+t = t"{'\InHere'=}"

crates/ruff_linter/resources/test/fixtures/pyflakes/F704.py

@@ -9,3 +9,11 @@ class Foo:
 yield 3
 yield from 3
 await f()
+
+def _():
+    # Invalid yield scopes; but not outside a function
+    type X[T: (yield 1)] = int
+    type Y = (yield 2)
+
+    # Valid yield scope
+    yield 3

crates/ruff_linter/resources/test/fixtures/pylint/missing_maxsplit_arg.py

@@ -0,0 +1,184 @@
+SEQ = "1,2,3"
+
+class Foo(str):
+    class_str = "1,2,3"
+    
+    def split(self, sep=None, maxsplit=-1) -> list[str]:
+        return super().split(sep, maxsplit)
+
+class Bar():
+    split = "1,2,3"
+
+# Errors
+## Test split called directly on string literal
+"1,2,3".split(",")[0]  # [missing-maxsplit-arg]
+"1,2,3".split(",")[-1]  # [missing-maxsplit-arg]
+"1,2,3".rsplit(",")[0]  # [missing-maxsplit-arg]
+"1,2,3".rsplit(",")[-1]  # [missing-maxsplit-arg]
+
+## Test split called on string variable
+SEQ.split(",")[0]  # [missing-maxsplit-arg]
+SEQ.split(",")[-1]  # [missing-maxsplit-arg]
+SEQ.rsplit(",")[0]  # [missing-maxsplit-arg]
+SEQ.rsplit(",")[-1]  # [missing-maxsplit-arg]
+
+## Test split called on class attribute
+Foo.class_str.split(",")[0]  # [missing-maxsplit-arg]
+Foo.class_str.split(",")[-1]  # [missing-maxsplit-arg]
+Foo.class_str.rsplit(",")[0]  # [missing-maxsplit-arg]
+Foo.class_str.rsplit(",")[-1]  # [missing-maxsplit-arg]
+
+## Test split called on sliced string
+"1,2,3"[::-1].split(",")[0]  # [missing-maxsplit-arg]
+"1,2,3"[::-1][::-1].split(",")[0]  # [missing-maxsplit-arg]
+SEQ[:3].split(",")[0]  # [missing-maxsplit-arg]
+Foo.class_str[1:3].split(",")[-1]  # [missing-maxsplit-arg]
+"1,2,3"[::-1].rsplit(",")[0]  # [missing-maxsplit-arg]
+SEQ[:3].rsplit(",")[0]  # [missing-maxsplit-arg]
+Foo.class_str[1:3].rsplit(",")[-1]  # [missing-maxsplit-arg]
+
+## Test sep given as named argument
+"1,2,3".split(sep=",")[0]  # [missing-maxsplit-arg]
+"1,2,3".split(sep=",")[-1]  # [missing-maxsplit-arg]
+"1,2,3".rsplit(sep=",")[0]  # [missing-maxsplit-arg]
+"1,2,3".rsplit(sep=",")[-1]  # [missing-maxsplit-arg]
+
+## Special cases
+"1,2,3".split("\n")[0]  # [missing-maxsplit-arg]
+"1,2,3".split("split")[-1]  # [missing-maxsplit-arg]
+"1,2,3".rsplit("rsplit")[0]  # [missing-maxsplit-arg]
+
+## Test class attribute named split
+Bar.split.split(",")[0]  # [missing-maxsplit-arg]
+Bar.split.split(",")[-1]  # [missing-maxsplit-arg]
+Bar.split.rsplit(",")[0]  # [missing-maxsplit-arg]
+Bar.split.rsplit(",")[-1]  # [missing-maxsplit-arg]
+
+## Test unpacked dict literal kwargs 
+"1,2,3".split(**{"sep": ","})[0]  # [missing-maxsplit-arg]
+
+
+# OK
+## Test not accessing the first or last element
+### Test split called directly on string literal
+"1,2,3".split(",")[1]
+"1,2,3".split(",")[-2]
+"1,2,3".rsplit(",")[1]
+"1,2,3".rsplit(",")[-2]
+
+### Test split called on string variable
+SEQ.split(",")[1]
+SEQ.split(",")[-2]
+SEQ.rsplit(",")[1]
+SEQ.rsplit(",")[-2]
+
+### Test split called on class attribute
+Foo.class_str.split(",")[1]
+Foo.class_str.split(",")[-2]
+Foo.class_str.rsplit(",")[1]
+Foo.class_str.rsplit(",")[-2]
+
+### Test split called on sliced string
+"1,2,3"[::-1].split(",")[1]
+SEQ[:3].split(",")[1]
+Foo.class_str[1:3].split(",")[-2]
+"1,2,3"[::-1].rsplit(",")[1]
+SEQ[:3].rsplit(",")[1]
+Foo.class_str[1:3].rsplit(",")[-2]
+
+### Test sep given as named argument
+"1,2,3".split(sep=",")[1]
+"1,2,3".split(sep=",")[-2]
+"1,2,3".rsplit(sep=",")[1]
+"1,2,3".rsplit(sep=",")[-2]
+
+## Test varying maxsplit argument
+### str.split() tests
+"1,2,3".split(sep=",", maxsplit=1)[-1]
+"1,2,3".split(sep=",", maxsplit=1)[0]
+"1,2,3".split(sep=",", maxsplit=2)[-1]
+"1,2,3".split(sep=",", maxsplit=2)[0]
+"1,2,3".split(sep=",", maxsplit=2)[1]
+
+### str.rsplit() tests
+"1,2,3".rsplit(sep=",", maxsplit=1)[-1]
+"1,2,3".rsplit(sep=",", maxsplit=1)[0]
+"1,2,3".rsplit(sep=",", maxsplit=2)[-1]
+"1,2,3".rsplit(sep=",", maxsplit=2)[0]
+"1,2,3".rsplit(sep=",", maxsplit=2)[1]
+
+## Test user-defined split
+Foo("1,2,3").split(",")[0]
+Foo("1,2,3").split(",")[-1]
+Foo("1,2,3").rsplit(",")[0]
+Foo("1,2,3").rsplit(",")[-1]
+
+## Test split called on sliced list
+["1", "2", "3"][::-1].split(",")[0]
+
+## Test class attribute named split
+Bar.split[0]
+Bar.split[-1]
+Bar.split[0]
+Bar.split[-1]
+
+## Test unpacked dict literal kwargs 
+"1,2,3".split(",", **{"maxsplit": 1})[0]
+"1,2,3".split(**{"sep": ",", "maxsplit": 1})[0]
+
+
+# TODO
+
+## Test variable split result index
+## TODO: These require the ability to resolve a variable name to a value
+# Errors
+result_index = 0
+"1,2,3".split(",")[result_index]  # TODO: [missing-maxsplit-arg]
+result_index = -1
+"1,2,3".split(",")[result_index]  # TODO: [missing-maxsplit-arg]
+# OK 
+result_index = 1
+"1,2,3".split(",")[result_index]
+result_index = -2
+"1,2,3".split(",")[result_index]
+
+
+## Test split result index modified in loop
+## TODO: These require the ability to recognize being in a loop where:
+##     - the result of split called on a string is indexed by a variable
+##     - the variable index above is modified
+# OK
+result_index = 0
+for j in range(3):
+    print(SEQ.split(",")[result_index])
+    result_index = result_index + 1
+
+
+## Test accessor
+## TODO: These require the ability to get the return type of a method
+## (possibly via `typing::is_string`)
+class Baz():
+    def __init__(self):
+        self.my_str = "1,2,3"
+
+    def get_string(self) -> str:
+        return self.my_str
+
+# Errors
+Baz().get_string().split(",")[0]  # TODO: [missing-maxsplit-arg]
+Baz().get_string().split(",")[-1]  # TODO: [missing-maxsplit-arg]
+# OK
+Baz().get_string().split(",")[1]
+Baz().get_string().split(",")[-2]
+
+
+## Test unpacked dict instance kwargs
+## TODO: These require the ability to resolve a dict variable name to a value
+# Errors
+kwargs_without_maxsplit = {"seq": ","}
+"1,2,3".split(**kwargs_without_maxsplit)[0]  # TODO: [missing-maxsplit-arg]
+# OK
+kwargs_with_maxsplit = {"maxsplit": 1}
+"1,2,3".split(",", **kwargs_with_maxsplit)[0]  # TODO: false positive
+kwargs_with_maxsplit = {"sep": ",", "maxsplit": 1}
+"1,2,3".split(**kwargs_with_maxsplit)[0]  # TODO: false positive

crates/ruff_linter/resources/test/fixtures/pylint/redeclared_assigned_name.py

@@ -2,5 +2,8 @@ FIRST, FIRST = (1, 2)  # PLW0128
 FIRST, (FIRST, SECOND) = (1, (1, 2))  # PLW0128
 FIRST, (FIRST, SECOND, (THIRD, FIRST)) = (1, (1, 2))  # PLW0128
 FIRST, SECOND, THIRD, FIRST, SECOND = (1, 2, 3, 4)  # PLW0128
+FIRST, [FIRST, SECOND] = (1, (1, 2)) # PLW0128
+FIRST, [FIRST, SECOND, [THIRD, FIRST]] = (1, (1, 2))  # PLW0128
+FIRST, *FIRST = (1, 2) # PLW0128
 
 FIRST, SECOND, _, _, _ignored = (1, 2, 3, 4, 5)  # OK

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP008.py

@@ -79,3 +79,29 @@ class DataClass:
 def normal(self):
     super(DataClass, self).f()  # OK
     super().f()  # OK (`TypeError` in practice)
+
+
+# see: https://github.com/astral-sh/ruff/issues/18477
+class A:
+    def foo(self):
+        pass
+
+
+class B(A):
+    def bar(self):
+        super(__class__, self).foo()
+
+
+# see: https://github.com/astral-sh/ruff/issues/18684
+class C:
+    def f(self):
+        super = print
+        super(C, self)
+
+
+import builtins
+
+
+class C:
+    def f(self):
+        builtins.super(C, self)

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP010.py

@@ -12,3 +12,4 @@ if True:
 if True:
     from __future__ import generator_stop
     from __future__ import invalid_module, generators
+    from __future__ import generators  # comment

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP035.py

@@ -110,6 +110,8 @@ from typing_extensions import CapsuleType
 # UP035 on py313+ only
 from typing_extensions import deprecated
 
+# UP035 on py313+ only
+from typing_extensions import get_type_hints
 
 # https://github.com/astral-sh/ruff/issues/15780
 from typing_extensions import is_typeddict

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP045.py

@@ -42,3 +42,8 @@ class ServiceRefOrValue:
 # Regression test for: https://github.com/astral-sh/ruff/issues/7201
 class ServiceRefOrValue:
     service_specification: Optional[str]is not True = None
+
+
+# Test for: https://github.com/astral-sh/ruff/issues/18508
+# Optional[None] should not be offered a fix
+foo: Optional[None] = None

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP050.py

@@ -0,0 +1,84 @@
+class A:
+    ...
+
+
+class A(metaclass=type):
+    ...
+
+
+class A(
+    metaclass=type
+):
+    ...
+
+
+class A(
+    metaclass=type
+    #
+):
+    ...
+
+
+class A(
+    #
+    metaclass=type
+):
+    ...
+
+
+class A(
+    metaclass=type,
+    #
+):
+    ...
+
+
+class A(
+    #
+    metaclass=type,
+    #
+):
+    ...
+
+
+class B(A, metaclass=type):
+    ...
+
+
+class B(
+    A,
+    metaclass=type,
+):
+    ...
+
+
+class B(
+    A,
+    # comment
+    metaclass=type,
+):
+    ...
+
+
+def foo():
+    class A(metaclass=type):
+        ...
+
+
+class A(
+    metaclass=type  # comment
+    ,
+):
+    ...
+
+
+type = str
+
+class Foo(metaclass=type):
+    ...
+
+
+import builtins
+
+class A(metaclass=builtins.type):
+    ...

crates/ruff_linter/resources/test/fixtures/refurb/FURB122.py

@@ -174,3 +174,43 @@ def _():
         global global_foo
         for [a, b, (global_foo, c)] in d:
             f.write((a, b))
+
+
+# Test cases for lambda and ternary expressions - https://github.com/astral-sh/ruff/issues/18590
+
+def _():
+    with Path("file.txt").open("w", encoding="utf-8") as f:
+        for l in lambda: 0:
+            f.write(f"[{l}]")
+
+
+def _():
+    with Path("file.txt").open("w", encoding="utf-8") as f:
+        for l in (1,) if True else (2,):
+            f.write(f"[{l}]")
+
+
+# don't need to add parentheses when making a function argument
+def _():
+    with open("file", "w") as f:
+        for line in lambda: 0:
+            f.write(line)
+
+
+def _():
+    with open("file", "w") as f:
+        for line in (1,) if True else (2,):
+            f.write(line)
+
+
+# don't add extra parentheses if they're already parenthesized
+def _():
+    with open("file", "w") as f:
+        for line in (lambda: 0):
+            f.write(f"{line}")
+
+
+def _():
+    with open("file", "w") as f:
+        for line in ((1,) if True else (2,)):
+            f.write(f"{line}")

crates/ruff_linter/resources/test/fixtures/refurb/FURB129.py

@@ -43,7 +43,6 @@ def func():
 
 import builtins
 
-
 with builtins.open("FURB129.py") as f:
     for line in f.readlines():
         pass
@@ -51,7 +50,6 @@ with builtins.open("FURB129.py") as f:
 
 from builtins import open as o
 
-
 with o("FURB129.py") as f:
     for line in f.readlines():
         pass
@@ -89,3 +87,21 @@ with open("FURB129.py") as f:
         pass
     for _not_line in f.readline():
         pass
+
+# https://github.com/astral-sh/ruff/issues/18231
+with open("furb129.py") as f:
+    for line in (f).readlines():
+        pass
+
+with open("furb129.py") as f:
+    [line for line in (f).readlines()]
+
+
+with open("furb129.py") as f:
+    for line in (((f))).readlines():
+        pass
+    for line in(f).readlines():
+        pass
+
+    # Test case for issue #17683 (missing space before keyword)
+    print([line for line in f.readlines()if True])

crates/ruff_linter/resources/test/fixtures/refurb/FURB142.py

@@ -74,3 +74,28 @@ async def f(y):
 def g():
     for x in (set(),):
         x.add(x)
+
+
+# Test cases for lambda and ternary expressions - https://github.com/astral-sh/ruff/issues/18590
+
+s = set()
+
+for x in lambda: 0:
+    s.discard(-x)
+
+for x in (1,) if True else (2,):
+    s.add(-x)
+
+# don't add extra parens
+for x in (lambda: 0):
+    s.discard(-x)
+
+for x in ((1,) if True else (2,)):
+    s.add(-x)
+
+# don't add parens directly in function call
+for x in lambda: 0:
+    s.discard(x)
+
+for x in (1,) if True else (2,):
+    s.add(x)

crates/ruff_linter/resources/test/fixtures/refurb/FURB163.py

@@ -43,3 +43,33 @@ log(1, math.e)
 
 math.log(1, 2.0001)
 math.log(1, 10.0001)
+
+
+# see: https://github.com/astral-sh/ruff/issues/18639
+math.log(1, 10 # comment
+         )
+
+math.log(1,
+         10 # comment
+         )
+
+math.log(1 # comment
+         , # comment
+         10 # comment
+         )
+
+math.log(
+    1 # comment
+    ,
+    10 # comment
+)
+
+math.log(4.13e223, 2)
+math.log(4.14e223, 10)
+
+
+def print_log(*args):
+    try:
+        print(math.log(*args, math.e))
+    except TypeError as e:
+        print(repr(e))