Fix Charlie's typo

## Summary

Ensures that we avoid flagging cases like:

```python
async def f(x: int):
    if x > 0:
        task = asyncio.create_task(make_request())
    else:
        task = asyncio.create_task(make_request())
    await task
```

Closes https://github.com/astral-sh/ruff/issues/9133.

.github/workflows/ci.yaml

@@ -48,8 +48,8 @@ jobs:
               - "!crates/ruff_dev/**"
               - "!crates/ruff_shrinking/**"
               - scripts/*
-              - .github/workflows/ci.yaml
               - python/**
+              - .github/workflows/ci.yaml
 
             formatter:
               - Cargo.toml
@@ -68,7 +68,7 @@ jobs:
               - .github/workflows/ci.yaml
 
             code:
-              - "*/**"
+              - "**/*"
               - "!**/*.md"
               - "!docs/**"
               - "!assets/**"
@@ -86,7 +86,7 @@ jobs:
     name: "cargo clippy"
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -102,7 +102,7 @@ jobs:
   cargo-test-linux:
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     name: "cargo test (linux)"
     steps:
       - uses: actions/checkout@v4
@@ -128,7 +128,7 @@ jobs:
   cargo-test-windows:
     runs-on: windows-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     name: "cargo test (windows)"
     steps:
       - uses: actions/checkout@v4
@@ -147,7 +147,7 @@ jobs:
   cargo-test-wasm:
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     name: "cargo test (wasm)"
     steps:
       - uses: actions/checkout@v4
@@ -168,7 +168,7 @@ jobs:
   cargo-fuzz:
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     name: "cargo fuzz"
     steps:
       - uses: actions/checkout@v4
@@ -187,7 +187,7 @@ jobs:
     name: "test scripts"
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -215,7 +215,7 @@ jobs:
       }}
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
@@ -226,7 +226,7 @@ jobs:
           name: ruff
           path: target/debug
 
-      - uses: dawidd6/action-download-artifact@v2
+      - uses: dawidd6/action-download-artifact@v3
         name: Download baseline Ruff binary
         with:
           name: ruff
@@ -321,7 +321,7 @@ jobs:
     name: "cargo udeps"
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     steps:
       - uses: actions/checkout@v4
       - name: "Install nightly Rust toolchain"
@@ -338,7 +338,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -362,7 +362,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Install Rust toolchain"
@@ -392,7 +392,7 @@ jobs:
       MKDOCS_INSIDERS_SSH_KEY_EXISTS: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY != '' }}
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
       - name: "Add SSH key"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
         uses: webfactory/ssh-agent@v0.8.0
@@ -444,7 +444,7 @@ jobs:
     needs:
       - cargo-test-linux
       - determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     steps:
       - uses: extractions/setup-just@v1
         env:
@@ -455,7 +455,7 @@ jobs:
         with:
           repository: "astral-sh/ruff-lsp"
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
@@ -483,7 +483,7 @@ jobs:
   benchmarks:
     runs-on: ubuntu-latest
     needs: determine_changes
-    if: needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main'
+    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
     steps:
       - name: "Checkout Branch"
         uses: actions/checkout@v4
@@ -502,7 +502,7 @@ jobs:
         run: cargo codspeed build --features codspeed -p ruff_benchmark
 
       - name: "Run benchmarks"
-        uses: CodSpeedHQ/action@v1
+        uses: CodSpeedHQ/action@v2
         with:
           run: cargo codspeed run
           token: ${{ secrets.CODSPEED_TOKEN }}

.github/workflows/docs.yaml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.ref }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
       - name: "Add SSH key"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
         uses: webfactory/ssh-agent@v0.8.0

.github/workflows/flake8-to-ruff.yaml

@@ -20,7 +20,7 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -43,7 +43,7 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -69,7 +69,7 @@ jobs:
         target: [x64, x86]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: ${{ matrix.target }}
@@ -97,7 +97,7 @@ jobs:
         target: [x86_64, i686]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -124,7 +124,7 @@ jobs:
         target: [aarch64, armv7, s390x, ppc64le, ppc64]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Build wheels"
@@ -161,7 +161,7 @@ jobs:
           - i686-unknown-linux-musl
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -197,7 +197,7 @@ jobs:
             arch: armv7
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Build wheels"
@@ -237,7 +237,7 @@ jobs:
       - uses: actions/download-artifact@v3
         with:
           name: wheels
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
       - name: "Publish to PyPi"
         env:
           TWINE_USERNAME: __token__

.github/workflows/pr-comment.yaml

@@ -17,7 +17,7 @@ jobs:
   comment:
     runs-on: ubuntu-latest
     steps:
-      - uses: dawidd6/action-download-artifact@v2
+      - uses: dawidd6/action-download-artifact@v3
         name: Download pull request number
         with:
           name: pr-number
@@ -32,7 +32,7 @@ jobs:
             echo "pr-number=$(<pr-number)" >> $GITHUB_OUTPUT
           fi
 
-      - uses: dawidd6/action-download-artifact@v2
+      - uses: dawidd6/action-download-artifact@v3
         name: "Download ecosystem results"
         id: download-ecosystem-result
         if: steps.pr-number.outputs.pr-number

.github/workflows/release.yaml

@@ -36,7 +36,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Prep README.md"
@@ -63,7 +63,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -86,7 +86,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-x86_64-apple-darwin.tar.gz
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-x86_64-apple-darwin.tar.gz
           tar czvf $ARCHIVE_FILE -C target/x86_64-apple-darwin/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -103,7 +103,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -125,7 +125,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-aarch64-apple-darwin.tar.gz
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-aarch64-apple-darwin.tar.gz
           tar czvf $ARCHIVE_FILE -C target/aarch64-apple-darwin/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -151,7 +151,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: ${{ matrix.platform.arch }}
@@ -177,7 +177,7 @@ jobs:
       - name: "Archive binary"
         shell: bash
         run: |
-          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.zip
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.platform.target }}.zip
           7z a $ARCHIVE_FILE ./target/${{ matrix.platform.target }}/release/ruff.exe
           sha256sum $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -199,7 +199,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -224,7 +224,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ matrix.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.target }}.tar.gz
           tar czvf $ARCHIVE_FILE -C target/${{ matrix.target }}/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -258,7 +258,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Prep README.md"
@@ -291,7 +291,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.platform.target }}.tar.gz
           tar czvf $ARCHIVE_FILE -C target/${{ matrix.platform.target }}/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -313,7 +313,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -332,10 +332,10 @@ jobs:
           image: alpine:latest
           options: -v ${{ github.workspace }}:/io -w /io
           run: |
-            apk add py3-pip
-            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links /io/dist/ --force-reinstall
-            ruff --help
-            python -m ruff --help
+            apk add python3
+            python -m venv .venv
+            .venv/bin/pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
+            .venv/bin/ruff check --help
       - name: "Upload wheels"
         uses: actions/upload-artifact@v3
         with:
@@ -343,7 +343,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ matrix.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.target }}.tar.gz
           tar czvf $ARCHIVE_FILE -C target/${{ matrix.target }}/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -369,7 +369,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Prep README.md"
@@ -388,10 +388,11 @@ jobs:
           distro: alpine_latest
           githubToken: ${{ github.token }}
           install: |
-            apk add py3-pip
+            apk add python3
           run: |
-            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-            ruff check --help
+            python -m venv .venv
+            .venv/bin/pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
+            .venv/bin/ruff check --help
       - name: "Upload wheels"
         uses: actions/upload-artifact@v3
         with:
@@ -399,7 +400,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.platform.target }}.tar.gz
           tar czvf $ARCHIVE_FILE -C target/${{ matrix.platform.target }}/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"

BREAKING_CHANGES.md

@@ -1,5 +1,42 @@
 # Breaking Changes
 
+## 0.1.9
+
+### `site-packages` is now excluded by default ([#5513](https://github.com/astral-sh/ruff/pull/5513))
+
+Ruff maintains a list of default exclusions, which now consists of the following patterns:
+
+- `.bzr`
+- `.direnv`
+- `.eggs`
+- `.git-rewrite`
+- `.git`
+- `.hg`
+- `.ipynb_checkpoints`
+- `.mypy_cache`
+- `.nox`
+- `.pants.d`
+- `.pyenv`
+- `.pytest_cache`
+- `.pytype`
+- `.ruff_cache`
+- `.svn`
+- `.tox`
+- `.venv`
+- `.vscode`
+- `__pypackages__`
+- `_build`
+- `buck-out`
+- `build`
+- `dist`
+- `node_modules`
+- `site-packages`
+- `venv`
+
+Previously, the `site-packages` directory was not excluded by default. While `site-packages` tends
+to be excluded anyway by virtue of the `.venv` exclusion, this may not be the case when using Ruff
+from VS Code outside a virtual environment.
+
 ## 0.1.0
 
 ### The deprecated `format` setting has been removed

CHANGELOG.md

@@ -1,5 +1,156 @@
 # Changelog
 
+## 0.1.8
+
+This release includes opt-in support for formatting Python snippets within
+docstrings via the `docstring-code-format` setting.
+[Check out the blog post](https://astral.sh/blog/ruff-v0.1.8) for more details!
+
+### Preview features
+
+- Add `"preserve"` quote-style to mimic Black's skip-string-normalization ([#8822](https://github.com/astral-sh/ruff/pull/8822))
+- Implement `prefer_splitting_right_hand_side_of_assignments` preview style ([#8943](https://github.com/astral-sh/ruff/pull/8943))
+- \[`pycodestyle`\] Add fix for `unexpected-spaces-around-keyword-parameter-equals` ([#9072](https://github.com/astral-sh/ruff/pull/9072))
+- \[`pycodestyle`\] Add fix for comment-related whitespace rules ([#9075](https://github.com/astral-sh/ruff/pull/9075))
+- \[`pycodestyle`\] Allow `sys.path` modifications between imports ([#9047](https://github.com/astral-sh/ruff/pull/9047))
+- \[`refurb`\] Implement `hashlib-digest-hex` (`FURB181`) ([#9077](https://github.com/astral-sh/ruff/pull/9077))
+
+### Rule changes
+
+- Allow `flake8-type-checking` rules to automatically quote runtime-evaluated references ([#6001](https://github.com/astral-sh/ruff/pull/6001))
+- Allow transparent cell magics in Jupyter Notebooks ([#8911](https://github.com/astral-sh/ruff/pull/8911))
+- \[`flake8-annotations`\] Avoid `ANN2xx` fixes for abstract methods with empty bodies ([#9034](https://github.com/astral-sh/ruff/pull/9034))
+- \[`flake8-self`\] Ignore underscore references in type annotations ([#9036](https://github.com/astral-sh/ruff/pull/9036))
+- \[`pep8-naming`\] Allow class names when `apps.get_model` is a non-string ([#9065](https://github.com/astral-sh/ruff/pull/9065))
+- \[`pycodestyle`\] Allow `matplotlib.use` calls to intersperse imports ([#9094](https://github.com/astral-sh/ruff/pull/9094))
+- \[`pyflakes`\] Support fixing unused assignments in tuples by renaming variables (`F841`) ([#9107](https://github.com/astral-sh/ruff/pull/9107))
+- \[`pylint`\] Add fix for `subprocess-run-without-check` (`PLW1510`) ([#6708](https://github.com/astral-sh/ruff/pull/6708))
+
+### Formatter
+
+- Add `docstring-code-format` knob to enable docstring snippet formatting ([#8854](https://github.com/astral-sh/ruff/pull/8854))
+- Use double quotes for all docstrings, including single-quoted docstrings ([#9020](https://github.com/astral-sh/ruff/pull/9020))
+- Implement "dynamic" line width mode for docstring code formatting ([#9098](https://github.com/astral-sh/ruff/pull/9098))
+- Support reformatting Markdown code blocks ([#9030](https://github.com/astral-sh/ruff/pull/9030))
+- add support for formatting reStructuredText code snippets ([#9003](https://github.com/astral-sh/ruff/pull/9003))
+- Avoid trailing comma for single-argument with positional separator ([#9076](https://github.com/astral-sh/ruff/pull/9076))
+- Fix handling of trailing target comment ([#9051](https://github.com/astral-sh/ruff/pull/9051))
+
+### CLI
+
+- Hide unsafe fix suggestions when explicitly disabled ([#9095](https://github.com/astral-sh/ruff/pull/9095))
+- Add SARIF support to `--output-format` ([#9078](https://github.com/astral-sh/ruff/pull/9078))
+
+### Bug fixes
+
+- Apply unnecessary index rule prior to enumerate rewrite ([#9012](https://github.com/astral-sh/ruff/pull/9012))
+- \[`flake8-err-msg`\] Allow `EM` fixes even if `msg` variable is defined ([#9059](https://github.com/astral-sh/ruff/pull/9059))
+- \[`flake8-pie`\] Prevent keyword arguments duplication ([#8450](https://github.com/astral-sh/ruff/pull/8450))
+- \[`flake8-pie`\] Respect trailing comma in `unnecessary-dict-kwargs` (`PIE804`) ([#9015](https://github.com/astral-sh/ruff/pull/9015))
+- \[`flake8-raise`\] Avoid removing parentheses on ctypes.WinError ([#9027](https://github.com/astral-sh/ruff/pull/9027))
+- \[`isort`\] Avoid invalid combination of `force-sort-within-types` and `lines-between-types` ([#9041](https://github.com/astral-sh/ruff/pull/9041))
+- \[`isort`\] Ensure that from-style imports are always ordered first in `__future__` ([#9039](https://github.com/astral-sh/ruff/pull/9039))
+- \[`pycodestyle`\] Allow tab indentation before keyword ([#9099](https://github.com/astral-sh/ruff/pull/9099))
+- \[`pylint`\] Ignore `@overrides` and `@overloads` for `too-many-positional` ([#9000](https://github.com/astral-sh/ruff/pull/9000))
+- \[`pyupgrade`\] Enable `printf-string-formatting` fix with comments on right-hand side ([#9037](https://github.com/astral-sh/ruff/pull/9037))
+- \[`refurb`\] Make `math-constant` (`FURB152`) rule more targeted ([#9054](https://github.com/astral-sh/ruff/pull/9054))
+- \[`refurb`\] Support floating-point base in `redundant-log-base` (`FURB163`) ([#9100](https://github.com/astral-sh/ruff/pull/9100))
+- \[`ruff`\] Detect `unused-asyncio-dangling-task` (`RUF006`) on unused assignments ([#9060](https://github.com/astral-sh/ruff/pull/9060))
+
+## 0.1.7
+
+### Preview features
+
+- Implement multiline dictionary and list hugging for preview style ([#8293](https://github.com/astral-sh/ruff/pull/8293))
+- Implement the `fix_power_op_line_length` preview style ([#8947](https://github.com/astral-sh/ruff/pull/8947))
+- Use Python version to determine typing rewrite safety ([#8919](https://github.com/astral-sh/ruff/pull/8919))
+- \[`flake8-annotations`\] Enable auto-return-type involving `Optional` and `Union` annotations ([#8885](https://github.com/astral-sh/ruff/pull/8885))
+- \[`flake8-bandit`\] Implement `django-raw-sql` (`S611`) ([#8651](https://github.com/astral-sh/ruff/pull/8651))
+- \[`flake8-bandit`\] Implement `tarfile-unsafe-members` (`S202`) ([#8829](https://github.com/astral-sh/ruff/pull/8829))
+- \[`flake8-pyi`\] Implement fix for `unnecessary-literal-union` (`PYI030`) ([#7934](https://github.com/astral-sh/ruff/pull/7934))
+- \[`flake8-simplify`\] Extend `dict-get-with-none-default` (`SIM910`) to non-literals ([#8762](https://github.com/astral-sh/ruff/pull/8762))
+- \[`pylint`\] - add `unnecessary-list-index-lookup` (`PLR1736`) + autofix ([#7999](https://github.com/astral-sh/ruff/pull/7999))
+- \[`pylint`\] - implement R0202 and R0203 with autofixes ([#8335](https://github.com/astral-sh/ruff/pull/8335))
+- \[`pylint`\] Implement `repeated-keyword` (`PLe1132`) ([#8706](https://github.com/astral-sh/ruff/pull/8706))
+- \[`pylint`\] Implement `too-many-positional` (`PLR0917`) ([#8995](https://github.com/astral-sh/ruff/pull/8995))
+- \[`pylint`\] Implement `unnecessary-dict-index-lookup` (`PLR1733`) ([#8036](https://github.com/astral-sh/ruff/pull/8036))
+- \[`refurb`\] Implement `redundant-log-base` (`FURB163`) ([#8842](https://github.com/astral-sh/ruff/pull/8842))
+
+### Rule changes
+
+- \[`flake8-boolean-trap`\] Allow booleans in `@override` methods ([#8882](https://github.com/astral-sh/ruff/pull/8882))
+- \[`flake8-bugbear`\] Avoid `B015`,`B018` for last expression in a cell ([#8815](https://github.com/astral-sh/ruff/pull/8815))
+- \[`flake8-pie`\] Allow ellipses for enum values in stub files ([#8825](https://github.com/astral-sh/ruff/pull/8825))
+- \[`flake8-pyi`\] Check PEP 695 type aliases for `snake-case-type-alias` and `t-suffixed-type-alias` ([#8966](https://github.com/astral-sh/ruff/pull/8966))
+- \[`flake8-pyi`\] Check for kwarg and vararg `NoReturn` type annotations ([#8948](https://github.com/astral-sh/ruff/pull/8948))
+- \[`flake8-simplify`\] Omit select context managers from `SIM117` ([#8801](https://github.com/astral-sh/ruff/pull/8801))
+- \[`pep8-naming`\] Allow Django model loads in `non-lowercase-variable-in-function` (`N806`) ([#8917](https://github.com/astral-sh/ruff/pull/8917))
+- \[`pycodestyle`\] Avoid `E703` for last expression in a cell ([#8821](https://github.com/astral-sh/ruff/pull/8821))
+- \[`pycodestyle`\] Update `E402` to work at cell level for notebooks ([#8872](https://github.com/astral-sh/ruff/pull/8872))
+- \[`pydocstyle`\] Avoid `D100` for Jupyter Notebooks ([#8816](https://github.com/astral-sh/ruff/pull/8816))
+- \[`pylint`\] Implement fix for `unspecified-encoding` (`PLW1514`) ([#8928](https://github.com/astral-sh/ruff/pull/8928))
+
+### Formatter
+
+- Avoid unstable formatting in ellipsis-only body with trailing comment ([#8984](https://github.com/astral-sh/ruff/pull/8984))
+- Inline trailing comments for type alias similar to assignments ([#8941](https://github.com/astral-sh/ruff/pull/8941))
+- Insert trailing comma when function breaks with single argument ([#8921](https://github.com/astral-sh/ruff/pull/8921))
+
+### CLI
+
+- Update `ruff check` and `ruff format` to default to the current directory ([#8791](https://github.com/astral-sh/ruff/pull/8791))
+- Stop at the first resolved parent configuration ([#8864](https://github.com/astral-sh/ruff/pull/8864))
+
+### Configuration
+
+- \[`pylint`\] Default `max-positional-args` to `max-args` ([#8998](https://github.com/astral-sh/ruff/pull/8998))
+- \[`pylint`\] Add `allow-dunder-method-names` setting for `bad-dunder-method-name` (`PLW3201`) ([#8812](https://github.com/astral-sh/ruff/pull/8812))
+- \[`isort`\] Add support for `from-first` setting ([#8663](https://github.com/astral-sh/ruff/pull/8663))
+- \[`isort`\]  Add support for `length-sort` settings ([#8841](https://github.com/astral-sh/ruff/pull/8841))
+
+### Bug fixes
+
+- Add support for `@functools.singledispatch` ([#8934](https://github.com/astral-sh/ruff/pull/8934))
+- Avoid off-by-one error in stripping noqa following multi-byte char ([#8979](https://github.com/astral-sh/ruff/pull/8979))
+- Avoid off-by-one error in with-item named expressions ([#8915](https://github.com/astral-sh/ruff/pull/8915))
+- Avoid syntax error via invalid ur string prefix ([#8971](https://github.com/astral-sh/ruff/pull/8971))
+- Avoid underflow in `get_model` matching ([#8965](https://github.com/astral-sh/ruff/pull/8965))
+- Avoid unnecessary index diagnostics when value is modified ([#8970](https://github.com/astral-sh/ruff/pull/8970))
+- Convert over-indentation rule to use number of characters ([#8983](https://github.com/astral-sh/ruff/pull/8983))
+- Detect implicit returns in auto-return-types ([#8952](https://github.com/astral-sh/ruff/pull/8952))
+- Fix start >= end error in over-indentation ([#8982](https://github.com/astral-sh/ruff/pull/8982))
+- Ignore `@overload` and `@override` methods for too-many-arguments checks ([#8954](https://github.com/astral-sh/ruff/pull/8954))
+- Lexer start of line is false only for `Mode::Expression` ([#8880](https://github.com/astral-sh/ruff/pull/8880))
+- Mark `pydantic_settings.BaseSettings` as having default copy semantics ([#8793](https://github.com/astral-sh/ruff/pull/8793))
+- Respect dictionary unpacking in `NamedTuple` assignments ([#8810](https://github.com/astral-sh/ruff/pull/8810))
+- Respect local subclasses in `flake8-type-checking` ([#8768](https://github.com/astral-sh/ruff/pull/8768))
+- Support type alias statements in simple statement positions ([#8916](https://github.com/astral-sh/ruff/pull/8916))
+- \[`flake8-annotations`\] Avoid filtering out un-representable types in return annotation ([#8881](https://github.com/astral-sh/ruff/pull/8881))
+- \[`flake8-pie`\] Retain extra ellipses in protocols and abstract methods ([#8769](https://github.com/astral-sh/ruff/pull/8769))
+- \[`flake8-pyi`\] Respect local enum subclasses in `simple-defaults` (`PYI052`) ([#8767](https://github.com/astral-sh/ruff/pull/8767))
+- \[`flake8-trio`\] Use correct range for `TRIO115` fix ([#8933](https://github.com/astral-sh/ruff/pull/8933))
+- \[`flake8-trio`\] Use full arguments range for zero-sleep-call ([#8936](https://github.com/astral-sh/ruff/pull/8936))
+- \[`isort`\] fix: mark `__main__` as first-party import ([#8805](https://github.com/astral-sh/ruff/pull/8805))
+- \[`pep8-naming`\] Avoid `N806` errors for type alias statements ([#8785](https://github.com/astral-sh/ruff/pull/8785))
+- \[`perflint`\] Avoid `PERF101` if there's an append in loop body ([#8809](https://github.com/astral-sh/ruff/pull/8809))
+- \[`pycodestyle`\] Allow space-before-colon after end-of-slice ([#8838](https://github.com/astral-sh/ruff/pull/8838))
+- \[`pydocstyle`\] Avoid non-character breaks in `over-indentation` (`D208`) ([#8866](https://github.com/astral-sh/ruff/pull/8866))
+- \[`pydocstyle`\] Ignore underlines when determining docstring logical lines ([#8929](https://github.com/astral-sh/ruff/pull/8929))
+- \[`pylint`\] Extend `self-assigning-variable` to multi-target assignments ([#8839](https://github.com/astral-sh/ruff/pull/8839))
+- \[`tryceratops`\] Avoid repeated triggers in nested `tryceratops` diagnostics ([#8772](https://github.com/astral-sh/ruff/pull/8772))
+
+### Documentation
+
+- Add advice for fixing RUF008 when mutability is not desired ([#8853](https://github.com/astral-sh/ruff/pull/8853))
+- Added the command to run ruff using pkgx to the installation.md ([#8955](https://github.com/astral-sh/ruff/pull/8955))
+- Document fix safety for flake8-comprehensions and some pyupgrade rules ([#8918](https://github.com/astral-sh/ruff/pull/8918))
+- Fix doc formatting for zero-sleep-call ([#8937](https://github.com/astral-sh/ruff/pull/8937))
+- Remove duplicate imports from os-stat documentation ([#8930](https://github.com/astral-sh/ruff/pull/8930))
+- Replace generated reference to MkDocs ([#8806](https://github.com/astral-sh/ruff/pull/8806))
+- Update Arch Linux package URL in installation.md ([#8802](https://github.com/astral-sh/ruff/pull/8802))
+- \[`flake8-pyi`\] Fix error in `t-suffixed-type-alias` (`PYI043`) example ([#8963](https://github.com/astral-sh/ruff/pull/8963))
+- \[`flake8-pyi`\] Improve motivation for `custom-type-var-return-type` (`PYI019`) ([#8766](https://github.com/astral-sh/ruff/pull/8766))
+
 ## 0.1.6
 
 ### Preview features

CONTRIBUTING.md

@@ -556,10 +556,10 @@ examples.
 
 #### Linux
 
-Install `perf` and build `ruff_benchmark` with the `release-debug` profile and then run it with perf
+Install `perf` and build `ruff_benchmark` with the `profiling` profile and then run it with perf
 
 ```shell
-cargo bench -p ruff_benchmark --no-run --profile=release-debug && perf record --call-graph dwarf -F 9999 cargo bench -p ruff_benchmark --profile=release-debug -- --profile-time=1
+cargo bench -p ruff_benchmark --no-run --profile=profiling && perf record --call-graph dwarf -F 9999 cargo bench -p ruff_benchmark --profile=profiling -- --profile-time=1
 ```
 
 You can also use the `ruff_dev` launcher to run `ruff check` multiple times on a repository to
@@ -567,8 +567,8 @@ gather enough samples for a good flamegraph (change the 999, the sample rate, an
 of checks, to your liking)
 
 ```shell
-cargo build --bin ruff_dev --profile=release-debug
-perf record -g -F 999 target/release-debug/ruff_dev repeat --repeat 30 --exit-zero --no-cache path/to/cpython > /dev/null
+cargo build --bin ruff_dev --profile=profiling
+perf record -g -F 999 target/profiling/ruff_dev repeat --repeat 30 --exit-zero --no-cache path/to/cpython > /dev/null
 ```
 
 Then convert the recorded profile
@@ -598,7 +598,7 @@ cargo install cargo-instruments
 Then run the profiler with
 
 ```shell
-cargo instruments -t time --bench linter --profile release-debug -p ruff_benchmark -- --profile-time=1
+cargo instruments -t time --bench linter --profile profiling -p ruff_benchmark -- --profile-time=1
 ```
 
 - `-t`: Specifies what to profile. Useful options are `time` to profile the wall time and `alloc`

Cargo.lock

@@ -16,14 +16,15 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "ahash"
-version = "0.8.3"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c99f64d1e06488f620f932677e24bc6e2897582980441ae90a671415bd7ec2f"
+checksum = "91429305e9f0a25f6205c5b8e0d2db09e0708a7a6df0f42212bb56c32c8ac97a"
 dependencies = [
  "cfg-if",
  "getrandom",
  "once_cell",
  "version_check",
+ "zerocopy",
 ]
 
 [[package]]
@@ -381,7 +382,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -606,7 +607,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -617,7 +618,7 @@ checksum = "836a9bbc7ad63342d6d6e7b815ccab164bc77a2d95d84bc3117a8c0d5c98e2d5"
 dependencies = [
  "darling_core",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -790,14 +791,14 @@ dependencies = [
 
 [[package]]
 name = "filetime"
-version = "0.2.22"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4029edd3e734da6fe05b6cd7bd2960760a616bd2ddd0d59a0124746d6272af0"
+checksum = "1ee447700ac8aa0b2f2bd7bc4462ad686ba06baa6727ac149a2d6277f0d240fd"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall 0.3.5",
- "windows-sys 0.48.0",
+ "redox_syscall 0.4.1",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -808,7 +809,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
 [[package]]
 name = "flake8-to-ruff"
-version = "0.1.6"
+version = "0.1.8"
 dependencies = [
  "anyhow",
  "clap",
@@ -827,7 +828,7 @@ dependencies = [
  "serde_json",
  "strum",
  "strum_macros",
- "toml 0.7.8",
+ "toml",
 ]
 
 [[package]]
@@ -848,18 +849,18 @@ checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
 [[package]]
 name = "form_urlencoded"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a62bc1cf6f830c2ec14a513a9fb124d0a213a629668a4186f329db21fe045652"
+checksum = "e13624c2627564efccf4934284bdd98cbaa14e79b0b5a141218e507b3a823456"
 dependencies = [
  "percent-encoding",
 ]
 
 [[package]]
 name = "fs-err"
-version = "2.10.0"
+version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb5fd9bcbe8b1087cbd395b51498c01bc997cef73e778a80b77a811af5e2d29f"
+checksum = "88a41f105fe1d5b6b34b2055e3dc59bb79b46b48b2040b9e6c7b4b5de097aa41"
 dependencies = [
  "autocfg",
 ]
@@ -987,9 +988,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
 name = "idna"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7d20d6b07bfbc108882d88ed8e37d39636dcc260e15e30c45e6ba089610b917c"
+checksum = "634d9b1461af396cad843f47fdba5597a4f9e6ddd4bfb6ff5d85028c25cb12f6"
 dependencies = [
  "unicode-bidi",
  "unicode-normalization",
@@ -1122,15 +1123,15 @@ dependencies = [
 
 [[package]]
 name = "is-macro"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4467ed1321b310c2625c5aa6c1b1ffc5de4d9e42668cf697a08fb033ee8265e"
+checksum = "bc74b7abae208af9314a406bd7dcc65091230b6e749c09e07a645885fecf34f9"
 dependencies = [
  "Inflector",
  "pmutil 0.6.1",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -1170,9 +1171,9 @@ checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
 
 [[package]]
 name = "js-sys"
-version = "0.3.65"
+version = "0.3.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54c0c35952f67de54bb584e9fd912b3023117cbafc0a77d8f3dee1fb5f572fe8"
+checksum = "cee9c64da59eae3b50095c18d3e74f8b73c0b86d2792824ff01bbce68ba229ca"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -1481,9 +1482,9 @@ checksum = "830b246a0e5f20af87141b25c173cd1b609bd7779a4617d6ec582abaf90870f3"
 
 [[package]]
 name = "once_cell"
-version = "1.18.0"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "oorandom"
@@ -1622,9 +1623,9 @@ dependencies = [
 
 [[package]]
 name = "percent-encoding"
-version = "2.3.0"
+version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
+checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
 [[package]]
 name = "petgraph"
@@ -1708,7 +1709,7 @@ checksum = "52a40bc70c2c58040d2d8b167ba9a5ff59fc9dab7ad44771cfde3dcfde7a09c6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -1810,7 +1811,7 @@ dependencies = [
  "pep440_rs",
  "pep508_rs",
  "serde",
- "toml 0.8.2",
+ "toml",
 ]
 
 [[package]]
@@ -2062,7 +2063,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_cli"
-version = "0.1.6"
+version = "0.1.8"
 dependencies = [
  "annotate-snippets 0.9.2",
  "anyhow",
@@ -2154,7 +2155,7 @@ dependencies = [
  "strum",
  "strum_macros",
  "tempfile",
- "toml 0.7.8",
+ "toml",
  "tracing",
  "tracing-indicatif",
  "tracing-subscriber",
@@ -2198,7 +2199,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_linter"
-version = "0.1.6"
+version = "0.1.8"
 dependencies = [
  "aho-corasick",
  "annotate-snippets 0.9.2",
@@ -2254,10 +2255,11 @@ dependencies = [
  "tempfile",
  "test-case",
  "thiserror",
- "toml 0.7.8",
+ "toml",
  "typed-arena",
  "unicode-width",
  "unicode_names2",
+ "url",
  "wsl",
 ]
 
@@ -2269,7 +2271,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "ruff_python_trivia",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -2450,7 +2452,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_shrinking"
-version = "0.1.6"
+version = "0.1.8"
 dependencies = [
  "anyhow",
  "clap",
@@ -2541,7 +2543,7 @@ dependencies = [
  "shellexpand",
  "strum",
  "tempfile",
- "toml 0.7.8",
+ "toml",
 ]
 
 [[package]]
@@ -2618,9 +2620,9 @@ dependencies = [
 
 [[package]]
 name = "schemars"
-version = "0.8.15"
+version = "0.8.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f7b0ce13155372a76ee2e1c5ffba1fe61ede73fbea5630d61eee6fac4929c0c"
+checksum = "45a28f4c49489add4ce10783f7911893516f15afe45d015608d41faca6bc4d29"
 dependencies = [
  "dyn-clone",
  "schemars_derive",
@@ -2630,9 +2632,9 @@ dependencies = [
 
 [[package]]
 name = "schemars_derive"
-version = "0.8.15"
+version = "0.8.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e85e2a16b12bdb763244c69ab79363d71db2b4b918a2def53f80b02e0574b13c"
+checksum = "c767fd6fa65d9ccf9cf026122c1b555f2ef9a4f0cea69da4d7dbc3e258d30967"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2676,18 +2678,18 @@ checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
 [[package]]
 name = "serde"
-version = "1.0.190"
+version = "1.0.193"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91d3c334ca1ee894a2c6f6ad698fe8c435b76d504b13d436f0685d648d6d96f7"
+checksum = "25dd9975e68d0cb5aa1120c288333fc98731bd1dd12f561e468ea4728c042b89"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde-wasm-bindgen"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17ba92964781421b6cef36bf0d7da26d201e96d84e1b10e7ae6ed416e516906d"
+checksum = "b9b713f70513ae1f8d92665bbbbda5c295c2cf1da5542881ae5eefe20c9af132"
 dependencies = [
  "js-sys",
  "serde",
@@ -2696,13 +2698,13 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.190"
+version = "1.0.193"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67c5609f394e5c2bd7fc51efda478004ea80ef42fee983d5c67a65e34f32c0e3"
+checksum = "43576ca501357b9b071ac53cdc7da8ef0cbd9493d8df094cd821777ea6e894d3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -2764,7 +2766,7 @@ dependencies = [
  "darling",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -2868,7 +2870,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -2884,9 +2886,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "13fa70a4ee923979ffb522cacce59d34421ebdea5625e1073c4326ef9d2dd42e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2973,7 +2975,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -2985,7 +2987,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
  "test-case-core",
 ]
 
@@ -3006,7 +3008,7 @@ checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -3089,18 +3091,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
-[[package]]
-name = "toml"
-version = "0.7.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd79e69d3b627db300ff956027cc6c3798cef26d22526befdfcd12feeb6d2257"
-dependencies = [
- "serde",
- "serde_spanned",
- "toml_datetime",
- "toml_edit 0.19.15",
-]
-
 [[package]]
 name = "toml"
 version = "0.8.2"
@@ -3110,7 +3100,7 @@ dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit 0.20.2",
+ "toml_edit",
 ]
 
 [[package]]
@@ -3122,19 +3112,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "toml_edit"
-version = "0.19.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
-dependencies = [
- "indexmap",
- "serde",
- "serde_spanned",
- "toml_datetime",
- "winnow",
-]
-
 [[package]]
 name = "toml_edit"
 version = "0.20.2"
@@ -3168,7 +3145,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -3183,9 +3160,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-indicatif"
-version = "0.3.5"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57e05fe4a1c906d94b275d8aeb8ff8b9deaca502aeb59ae8ab500a92b8032ac8"
+checksum = "069580424efe11d97c3fef4197fa98c004fa26672cc71ad8770d224e23b1951d"
 dependencies = [
  "indicatif",
  "tracing",
@@ -3305,9 +3282,9 @@ checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
 
 [[package]]
 name = "unicode_names2"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d5506ae2c3c1ccbdf468e52fc5ef536c2ccd981f01273a4cb81aa61021f3a5f"
+checksum = "ac64ef2f016dc69dfa8283394a70b057066eb054d5fcb6b9eb17bd2ec5097211"
 dependencies = [
  "phf",
  "unicode_names2_generator",
@@ -3315,9 +3292,9 @@ dependencies = [
 
 [[package]]
 name = "unicode_names2_generator"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6dfc680313e95bc6637fa278cd7a22390c3c2cd7b8b2bd28755bc6c0fc811e7"
+checksum = "013f6a731e80f3930de580e55ba41dfa846de4e0fdee4a701f97989cb1597d6a"
 dependencies = [
  "getopts",
  "log",
@@ -3334,9 +3311,9 @@ checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
 
 [[package]]
 name = "ureq"
-version = "2.8.0"
+version = "2.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5ccd538d4a604753ebc2f17cd9946e89b77bf87f6a8e2309667c6f2e87855e3"
+checksum = "f8cdd25c339e200129fe4de81451814e5228c9b771d57378817d6117cc2b3f97"
 dependencies = [
  "base64",
  "flate2",
@@ -3350,9 +3327,9 @@ dependencies = [
 
 [[package]]
 name = "url"
-version = "2.4.1"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "143b538f18257fac9cad154828a57c6bf5157e1aa604d4816b5995bf6de87ae5"
+checksum = "31e6302e3bb753d46e83516cae55ae196fc0c309407cf11ab35cc51a4c2a4633"
 dependencies = [
  "form_urlencoded",
  "idna",
@@ -3386,7 +3363,7 @@ checksum = "f49e7f3f3db8040a100710a11932239fd30697115e2ba4107080d8252939845e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -3461,9 +3438,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.88"
+version = "0.2.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7daec296f25a1bae309c0cd5c29c4b260e510e6d813c286b19eaadf409d40fce"
+checksum = "0ed0d4f68a3015cc185aff4db9506a015f4b96f95303897bfa23f846db54064e"
 dependencies = [
  "cfg-if",
  "wasm-bindgen-macro",
@@ -3471,24 +3448,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.88"
+version = "0.2.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e397f4664c0e4e428e8313a469aaa58310d302159845980fd23b0f22a847f217"
+checksum = "1b56f625e64f3a1084ded111c4d5f477df9f8c92df113852fa5a374dbda78826"
 dependencies = [
  "bumpalo",
  "log",
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.38"
+version = "0.4.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9afec9963e3d0994cac82455b2b3502b81a7f40f9a0d32181f7528d9f4b43e02"
+checksum = "ac36a15a220124ac510204aec1c3e5db8a22ab06fd6706d881dc6149f8ed9a12"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -3498,9 +3475,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.88"
+version = "0.2.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5961017b3b08ad5f3fe39f1e79877f8ee7c23c5e5fd5eb80de95abc41f1f16b2"
+checksum = "0162dbf37223cd2afce98f3d0785506dcb8d266223983e4b5b525859e6e182b2"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -3508,28 +3485,28 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.88"
+version = "0.2.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c5353b8dab669f5e10f5bd76df26a9360c748f054f862ff5f3f8aae0c7fb3907"
+checksum = "f0eb82fcb7930ae6219a7ecfd55b217f5f0893484b7a13022ebb2b2bf20b5283"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.88"
+version = "0.2.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d046c5d029ba91a1ed14da14dca44b68bf2f124cfbaf741c54151fdb3e0750b"
+checksum = "7ab9b36309365056cd639da3134bf87fa8f3d86008abf99e612384a6eecd459f"
 
 [[package]]
 name = "wasm-bindgen-test"
-version = "0.3.38"
+version = "0.3.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6433b7c56db97397842c46b67e11873eda263170afeb3a2dc74a7cb370fee0d"
+checksum = "2cf9242c0d27999b831eae4767b2a146feb0b27d332d553e605864acd2afd403"
 dependencies = [
  "console_error_panic_hook",
  "js-sys",
@@ -3541,13 +3518,13 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-test-macro"
-version = "0.3.38"
+version = "0.3.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "493fcbab756bb764fa37e6bee8cec2dd709eb4273d06d0c282a5e74275ded735"
+checksum = "794645f5408c9a039fd09f4d113cdfb2e7eba5ff1956b07bcf701cf4b394fe89"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.40",
 ]
 
 [[package]]
@@ -3644,6 +3621,15 @@ dependencies = [
  "windows-targets 0.48.5",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.0",
+]
+
 [[package]]
 name = "windows-targets"
 version = "0.42.2"
@@ -3674,6 +3660,21 @@ dependencies = [
  "windows_x86_64_msvc 0.48.5",
 ]
 
+[[package]]
+name = "windows-targets"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a18201040b24831fbb9e4eb208f8892e1f50a37feb53cc7ff887feb8f50e7cd"
+dependencies = [
+ "windows_aarch64_gnullvm 0.52.0",
+ "windows_aarch64_msvc 0.52.0",
+ "windows_i686_gnu 0.52.0",
+ "windows_i686_msvc 0.52.0",
+ "windows_x86_64_gnu 0.52.0",
+ "windows_x86_64_gnullvm 0.52.0",
+ "windows_x86_64_msvc 0.52.0",
+]
+
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.42.2"
@@ -3686,6 +3687,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb7764e35d4db8a7921e09562a0304bf2f93e0a51bfccee0bd0bb0b666b015ea"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.2"
@@ -3698,6 +3705,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbaa0368d4f1d2aaefc55b6fcfee13f41544ddf36801e793edbbfd7d7df075ef"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.2"
@@ -3710,6 +3723,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a28637cb1fa3560a16915793afb20081aba2c92ee8af57b4d5f28e4b3e7df313"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.2"
@@ -3722,6 +3741,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffe5e8e31046ce6230cc7215707b816e339ff4d4d67c65dffa206fd0f7aa7b9a"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.2"
@@ -3734,6 +3759,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d6fa32db2bc4a2f5abeacf2b69f7992cd09dca97498da74a151a3132c26befd"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.2"
@@ -3746,6 +3777,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a657e1e9d3f514745a572a6846d3c7aa7dbe1658c056ed9c3344c4109a6949e"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.2"
@@ -3758,6 +3795,12 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
+
 [[package]]
 name = "winnow"
 version = "0.5.15"
@@ -3796,3 +3839,23 @@ checksum = "fe5c30ade05e61656247b2e334a031dfd0cc466fadef865bdcdea8d537951bf1"
 dependencies = [
  "winapi",
 ]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "306dca4455518f1f31635ec308b6b3e4eb1b11758cefafc782827d0aa7acb5c7"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be912bf68235a88fbefd1b73415cb218405958d1655b2ece9035a19920bdf6ba"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.40",
+]

Cargo.toml

@@ -17,24 +17,24 @@ bitflags = { version = "2.4.1" }
 chrono = { version = "0.4.31", default-features = false, features = ["clock"] }
 clap = { version = "4.4.7", features = ["derive"] }
 colored = { version = "2.0.0" }
-filetime = { version = "0.2.20" }
+filetime = { version = "0.2.23" }
 glob = { version = "0.3.1" }
 globset = { version = "0.4.14" }
 ignore = { version = "0.4.20" }
 insta = { version = "1.34.0", feature = ["filters", "glob"] }
-is-macro = { version = "0.3.0" }
+is-macro = { version = "0.3.1" }
 itertools = { version = "0.11.0" }
 libcst = { version = "1.1.0", default-features = false }
 log = { version = "0.4.17" }
 memchr = { version = "2.6.4" }
-once_cell = { version = "1.17.1" }
+once_cell = { version = "1.19.0" }
 path-absolutize = { version = "3.1.1" }
 proc-macro2 = { version = "1.0.70" }
 quote = { version = "1.0.23" }
 regex = { version = "1.10.2" }
 rustc-hash = { version = "1.1.0" }
-schemars = { version = "0.8.15" }
-serde = { version = "1.0.190", features = ["derive"] }
+schemars = { version = "0.8.16" }
+serde = { version = "1.0.193", features = ["derive"] }
 serde_json = { version = "1.0.108" }
 shellexpand = { version = "3.0.0" }
 similar = { version = "2.3.0", features = ["inline"] }
@@ -42,15 +42,15 @@ smallvec = { version = "1.11.2" }
 static_assertions = "1.1.0"
 strum = { version = "0.25.0", features = ["strum_macros"] }
 strum_macros = { version = "0.25.3" }
-syn = { version = "2.0.39" }
+syn = { version = "2.0.40" }
 test-case = { version = "3.2.1" }
 thiserror = { version = "1.0.50" }
-toml = { version = "0.7.8" }
+toml = { version = "0.8.2" }
 tracing = { version = "0.1.40" }
-tracing-indicatif = { version = "0.3.4" }
+tracing-indicatif = { version = "0.3.6" }
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 unicode-ident = { version = "1.0.12" }
-unicode_names2 = { version = "1.2.0" }
+unicode_names2 = { version = "1.2.1" }
 unicode-width = { version = "0.1.11" }
 uuid = { version = "1.6.1", features = ["v4", "fast-rng", "macro-diagnostics", "js"] }
 wsl = { version = "0.1.0" }
@@ -88,7 +88,20 @@ rc_mutex = "warn"
 rest_pat_in_fully_bound_structs = "warn"
 
 [profile.release]
-lto = "fat"
+# Note that we set these explicitly, and these values
+# were chosen based on a trade-off between compile times
+# and runtime performance[1].
+#
+# [1]: https://github.com/astral-sh/ruff/pull/9031
+lto = "thin"
+codegen-units = 16
+
+# Some crates don't change as much but benefit more from
+# more expensive optimization passes, so we selectively
+# decrease codegen-units in some cases.
+[profile.release.package.ruff_python_parser]
+codegen-units = 1
+[profile.release.package.ruff_python_ast]
 codegen-units = 1
 
 [profile.dev.package.insta]
@@ -102,8 +115,8 @@ opt-level = 3
 [profile.dev.package.ruff_python_parser]
 opt-level = 1
 
-# Use the `--profile release-debug` flag to show symbols in release mode.
-# e.g. `cargo build --profile release-debug`
-[profile.release-debug]
+# Use the `--profile profiling` flag to show symbols in release mode.
+# e.g. `cargo build --profile profiling`
+[profile.profiling]
 inherits = "release"
 debug = 1

README.md

@@ -150,7 +150,7 @@ 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: v0.1.6
+  rev: v0.1.8
   hooks:
     # Run the linter.
     - id: ruff
@@ -194,20 +194,25 @@ exclude = [
     ".git",
     ".git-rewrite",
     ".hg",
+    ".ipynb_checkpoints",
     ".mypy_cache",
     ".nox",
     ".pants.d",
+    ".pyenv",
+    ".pytest_cache",
     ".pytype",
     ".ruff_cache",
     ".svn",
     ".tox",
     ".venv",
+    ".vscode",
     "__pypackages__",
     "_build",
     "buck-out",
     "build",
     "dist",
     "node_modules",
+    "site-packages",
     "venv",
 ]
 

crates/flake8_to_ruff/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.1.6"
+version = "0.1.8"
 description = """
 Convert Flake8 configuration files to Ruff configuration files.
 """

crates/ruff_benchmark/Cargo.toml

@@ -34,8 +34,8 @@ harness = false
 once_cell.workspace = true
 serde.workspace = true
 serde_json.workspace = true
-url = "2.3.1"
-ureq = "2.8.0"
+url = "2.5.0"
+ureq = "2.9.1"
 criterion = { version = "0.5.1", default-features = false }
 codspeed-criterion-compat = { version="2.3.3", default-features = false, optional = true}
 

crates/ruff_benchmark/benches/formatter.rs

@@ -4,7 +4,7 @@ use ruff_benchmark::criterion::{
     criterion_group, criterion_main, BenchmarkId, Criterion, Throughput,
 };
 use ruff_benchmark::{TestCase, TestFile, TestFileDownloadError};
-use ruff_python_formatter::{format_module_ast, PyFormatOptions};
+use ruff_python_formatter::{format_module_ast, PreviewMode, PyFormatOptions};
 use ruff_python_index::CommentRangesBuilder;
 use ruff_python_parser::lexer::lex;
 use ruff_python_parser::{parse_tokens, Mode};
@@ -69,7 +69,8 @@ fn benchmark_formatter(criterion: &mut Criterion) {
                     .expect("Input to be a valid python program");
 
                 b.iter(|| {
-                    let options = PyFormatOptions::from_extension(Path::new(case.name()));
+                    let options = PyFormatOptions::from_extension(Path::new(case.name()))
+                        .with_preview(PreviewMode::Enabled);
                     let formatted =
                         format_module_ast(&module, &comment_ranges, case.code(), options)
                             .expect("Formatting to succeed");

crates/ruff_cli/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_cli"
-version = "0.1.6"
+version = "0.1.8"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }
@@ -69,7 +69,7 @@ insta = { workspace = true, features = ["filters", "json"] }
 insta-cmd = { version = "0.4.0" }
 tempfile = "3.8.1"
 test-case = { workspace = true }
-ureq = { version = "2.8.0", features = [] }
+ureq = { version = "2.9.1", features = [] }
 
 [target.'cfg(target_os = "windows")'.dependencies]
 mimalloc = "0.1.39"

crates/ruff_cli/src/commands/format.rs

@@ -515,7 +515,7 @@ impl<'a> FormatResults<'a> {
         if changed > 0 && unchanged > 0 {
             writeln!(
                 f,
-                "{} file{} {}, {} file{} left unchanged",
+                "{} file{} {}, {} file{} {}",
                 changed,
                 if changed == 1 { "" } else { "s" },
                 match self.mode {
@@ -524,6 +524,10 @@ impl<'a> FormatResults<'a> {
                 },
                 unchanged,
                 if unchanged == 1 { "" } else { "s" },
+                match self.mode {
+                    FormatMode::Write => "left unchanged",
+                    FormatMode::Check | FormatMode::Diff => "already formatted",
+                },
             )
         } else if changed > 0 {
             writeln!(
@@ -539,9 +543,13 @@ impl<'a> FormatResults<'a> {
         } else if unchanged > 0 {
             writeln!(
                 f,
-                "{} file{} left unchanged",
+                "{} file{} {}",
                 unchanged,
                 if unchanged == 1 { "" } else { "s" },
+                match self.mode {
+                    FormatMode::Write => "left unchanged",
+                    FormatMode::Check | FormatMode::Diff => "already formatted",
+                },
             )
         } else {
             Ok(())

crates/ruff_cli/src/printer.rs

@@ -13,7 +13,7 @@ use ruff_linter::fs::relativize_path;
 use ruff_linter::logging::LogLevel;
 use ruff_linter::message::{
     AzureEmitter, Emitter, EmitterContext, GithubEmitter, GitlabEmitter, GroupedEmitter,
-    JsonEmitter, JsonLinesEmitter, JunitEmitter, PylintEmitter, TextEmitter,
+    JsonEmitter, JsonLinesEmitter, JunitEmitter, PylintEmitter, SarifEmitter, TextEmitter,
 };
 use ruff_linter::notify_user;
 use ruff_linter::registry::{AsRule, Rule};
@@ -125,15 +125,7 @@ impl Printer {
                 if let Some(fixables) = fixables {
                     let fix_prefix = format!("[{}]", "*".cyan());
 
-                    if self.unsafe_fixes.is_enabled() {
-                        if fixables.applicable > 0 {
-                            writeln!(
-                                writer,
-                                "{fix_prefix} {} fixable with the --fix option.",
-                                fixables.applicable
-                            )?;
-                        }
-                    } else {
+                    if self.unsafe_fixes.is_hint() {
                         if fixables.applicable > 0 && fixables.unapplicable_unsafe > 0 {
                             let es = if fixables.unapplicable_unsafe == 1 {
                                 ""
@@ -163,6 +155,14 @@ impl Printer {
                                 fixables.unapplicable_unsafe
                             )?;
                         }
+                    } else {
+                        if fixables.applicable > 0 {
+                            writeln!(
+                                writer,
+                                "{fix_prefix} {} fixable with the --fix option.",
+                                fixables.applicable
+                            )?;
+                        }
                     }
                 }
             } else {
@@ -291,6 +291,9 @@ impl Printer {
             SerializationFormat::Azure => {
                 AzureEmitter.emit(writer, &diagnostics.messages, &context)?;
             }
+            SerializationFormat::Sarif => {
+                SarifEmitter.emit(writer, &diagnostics.messages, &context)?;
+            }
         }
 
         writer.flush()?;

crates/ruff_cli/tests/format.rs

@@ -139,6 +139,99 @@ if condition:
     Ok(())
 }
 
+#[test]
+fn docstring_options() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+[format]
+docstring-code-format = true
+docstring-code-line-length = 20
+"#,
+    )?;
+
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--config"])
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"
+def f(x):
+    '''
+    Something about `f`. And an example:
+
+    .. code-block:: python
+
+        foo, bar, quux = this_is_a_long_line(lion, hippo, lemur, bear)
+
+    Another example:
+
+    ```py
+    foo, bar, quux = this_is_a_long_line(lion, hippo, lemur, bear)
+    ```
+
+    And another:
+
+    >>> foo, bar, quux = this_is_a_long_line(lion, hippo, lemur, bear)
+    '''
+    pass
+"#), @r###"
+success: true
+exit_code: 0
+----- stdout -----
+def f(x):
+    """
+    Something about `f`. And an example:
+
+    .. code-block:: python
+
+        (
+            foo,
+            bar,
+            quux,
+        ) = this_is_a_long_line(
+            lion,
+            hippo,
+            lemur,
+            bear,
+        )
+
+    Another example:
+
+    ```py
+    (
+        foo,
+        bar,
+        quux,
+    ) = this_is_a_long_line(
+        lion,
+        hippo,
+        lemur,
+        bear,
+    )
+    ```
+
+    And another:
+
+    >>> (
+    ...     foo,
+    ...     bar,
+    ...     quux,
+    ... ) = this_is_a_long_line(
+    ...     lion,
+    ...     hippo,
+    ...     lemur,
+    ...     bear,
+    ... )
+    """
+    pass
+
+----- stderr -----
+"###);
+    Ok(())
+}
+
 #[test]
 fn mixed_line_endings() -> Result<()> {
     let tempdir = TempDir::new()?;
@@ -162,7 +255,7 @@ fn mixed_line_endings() -> Result<()> {
     ----- stdout -----
 
     ----- stderr -----
-    2 files left unchanged
+    2 files already formatted
     "###);
     Ok(())
 }
@@ -235,6 +328,60 @@ OTHER = "OTHER"
     Ok(())
 }
 
+#[test]
+fn messages() -> Result<()> {
+    let tempdir = TempDir::new()?;
+
+    fs::write(
+        tempdir.path().join("main.py"),
+        r#"
+from test import say_hy
+
+if __name__ == "__main__":
+    say_hy("dear Ruff contributor")
+"#,
+    )?;
+
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .args(["format", "--no-cache", "--isolated", "--check"])
+        .arg("main.py"), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    Would reformat: main.py
+    1 file would be reformatted
+
+    ----- stderr -----
+    "###);
+
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .args(["format", "--no-cache", "--isolated"])
+        .arg("main.py"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    1 file reformatted
+
+    ----- stderr -----
+    "###);
+
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .args(["format", "--no-cache", "--isolated"])
+        .arg("main.py"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    1 file left unchanged
+
+    ----- stderr -----
+    "###);
+
+    Ok(())
+}
+
 #[test]
 fn force_exclude() -> Result<()> {
     let tempdir = TempDir::new()?;
@@ -783,7 +930,7 @@ fn test_diff() {
 
 
         ----- stderr -----
-        2 files would be reformatted, 1 file left unchanged
+        2 files would be reformatted, 1 file already formatted
         "###);
     });
 }

crates/ruff_cli/tests/integration_test.rs

@@ -1158,6 +1158,44 @@ fn check_hints_hidden_unsafe_fixes_with_no_safe_fixes() {
     "###);
 }
 
+#[test]
+fn check_no_hint_for_hidden_unsafe_fixes_when_disabled() {
+    let mut cmd = RuffCheck::default()
+        .args(["--select", "F601,UP034", "--no-unsafe-fixes"])
+        .build();
+    assert_cmd_snapshot!(cmd
+        .pass_stdin("x = {'a': 1, 'a': 1}\nprint(('foo'))\n"),
+        @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:14: F601 Dictionary key literal `'a'` repeated
+    -:2:7: UP034 [*] Avoid extraneous parentheses
+    Found 2 errors.
+    [*] 1 fixable with the --fix option.
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn check_no_hint_for_hidden_unsafe_fixes_with_no_safe_fixes_when_disabled() {
+    let mut cmd = RuffCheck::default()
+        .args(["--select", "F601", "--no-unsafe-fixes"])
+        .build();
+    assert_cmd_snapshot!(cmd
+        .pass_stdin("x = {'a': 1, 'a': 1}\n"),
+        @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:14: F601 Dictionary key literal `'a'` repeated
+    Found 1 error.
+
+    ----- stderr -----
+    "###);
+}
+
 #[test]
 fn check_shows_unsafe_fixes_with_opt_in() {
     let mut cmd = RuffCheck::default()

crates/ruff_diagnostics/src/edit.rs

@@ -7,7 +7,7 @@ use ruff_text_size::{Ranged, TextRange, TextSize};
 
 /// A text edit to be applied to a source file. Inserts, deletes, or replaces
 /// content at a given location.
-#[derive(Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Edit {
     /// The start location of the edit.

crates/ruff_linter/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_linter"
-version = "0.1.6"
+version = "0.1.8"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }
@@ -71,6 +71,7 @@ toml = { workspace = true }
 typed-arena = { version = "2.0.2" }
 unicode-width = { workspace = true }
 unicode_names2 = { workspace = true }
+url = { version = "2.2.2" }
 wsl = { version = "0.1.0" }
 
 [dev-dependencies]

crates/ruff_linter/resources/test/fixtures/control-flow-graph/for.py

@@ -39,3 +39,18 @@ def func():
     for i in range(1110):
         if True:
             break
+
+# TODO(charlie): The `pass` here does not get properly redirected to the top of the
+# loop, unlike below.
+def func():
+    for i in range(5):
+        pass
+    else:
+        return 1
+
+def func():
+    for i in range(5):
+        pass
+    else:
+        return 1
+    x = 1

crates/ruff_linter/resources/test/fixtures/control-flow-graph/match.py

@@ -129,3 +129,11 @@ def func():
             print("Grass is green")
         case Color.BLUE:
             print("I'm feeling the blues :(")
+
+
+def func(point):
+    match point:
+        case (0, 0):
+            print("Origin")
+        case foo:
+            raise ValueError("oops")

crates/ruff_linter/resources/test/fixtures/flake8_annotations/auto_return_type.py

@@ -63,3 +63,152 @@ def func(x: int):
         return "str"
     else:
         return None
+
+
+def func(x: int):
+    if x:
+        return 1
+
+
+def func():
+    x = 1
+
+
+def func(x: int):
+    if x > 0:
+        return 1
+
+
+def func(x: int):
+    match x:
+        case [1, 2, 3]:
+            return 1
+        case 4 as y:
+            return "foo"
+
+
+def func(x: int):
+    for i in range(5):
+        if i > 0:
+            return 1
+
+
+def func(x: int):
+    for i in range(5):
+        if i > 0:
+            return 1
+    else:
+        return 4
+
+
+def func(x: int):
+    for i in range(5):
+        if i > 0:
+            break
+    else:
+        return 4
+
+
+def func(x: int):
+    try:
+        pass
+    except:
+        return 1
+
+
+def func(x: int):
+    try:
+        pass
+    except:
+        return 1
+    finally:
+        return 2
+
+
+def func(x: int):
+    try:
+        pass
+    except:
+        return 1
+    else:
+        return 2
+
+
+def func(x: int):
+    try:
+        return 1
+    except:
+        return 2
+    else:
+        pass
+
+
+def func(x: int):
+    while x > 0:
+        break
+        return 1
+
+
+import abc
+from abc import abstractmethod
+
+
+class Foo(abc.ABC):
+    @abstractmethod
+    def method(self):
+        pass
+
+    @abc.abstractmethod
+    def method(self):
+        """Docstring."""
+
+    @abc.abstractmethod
+    def method(self):
+        ...
+
+    @staticmethod
+    @abstractmethod
+    def method():
+        pass
+
+    @classmethod
+    @abstractmethod
+    def method(cls):
+        pass
+
+    @abstractmethod
+    def method(self):
+        if self.x > 0:
+            return 1
+        else:
+            return 1.5
+
+
+def func(x: int):
+    try:
+        pass
+    except:
+        return 2
+
+
+def func(x: int):
+    try:
+        pass
+    except:
+        return 2
+    else:
+        return 3
+
+
+def func(x: int):
+    if not x:
+        raise ValueError
+    else:
+        raise TypeError
+
+
+def func(x: int):
+    if not x:
+        raise ValueError
+    else:
+        return 1

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

@@ -8,6 +8,7 @@ def func(address):
 # Error
 "0.0.0.0"
 '0.0.0.0'
+f"0.0.0.0"
 
 
 # Error

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

@@ -5,6 +5,9 @@ with open("/abc/tmp", "w") as f:
 with open("/tmp/abc", "w") as f:
     f.write("def")
 
+with open(f"/tmp/abc", "w") as f:
+    f.write("def")
+
 with open("/var/tmp/123", "w") as f:
     f.write("def")
 

crates/ruff_linter/resources/test/fixtures/flake8_django/DJ012.py

@@ -127,3 +127,21 @@ class MultipleConsecutiveFields(models.Model):
         pass
 
     middle_name = models.CharField(max_length=32)
+
+
+class BaseModel(models.Model):
+    pass
+
+
+class StrBeforeFieldInheritedModel(BaseModel):
+    """Model with `__str__` before fields."""
+
+    class Meta:
+        verbose_name = "test"
+        verbose_name_plural = "tests"
+
+    def __str__(self):
+        return "foobar"
+
+    first_name = models.CharField(max_length=32)
+

crates/ruff_linter/resources/test/fixtures/flake8_errmsg/EM.py

@@ -27,7 +27,7 @@ def f_ok():
     raise RuntimeError(msg)
 
 
-def f_unfixable():
+def f_msg_defined():
     msg = "hello"
     raise RuntimeError("This is an example exception")
 

crates/ruff_linter/resources/test/fixtures/flake8_pie/PIE804.py

@@ -10,7 +10,6 @@ Foo.objects.create(**{**bar})  # PIE804
 
 foo(**{})
 
-
 foo(**{**data, "foo": "buzz"})
 foo(**buzz)
 foo(**{"bar-foo": True})
@@ -20,3 +19,8 @@ foo(**{buzz: True})
 foo(**{"": True})
 foo(**{f"buzz__{bar}": True})
 abc(**{"for": 3})
+foo(**{},)
+
+# Duplicated key names won't be fixed, to avoid syntax errors.
+abc(**{'a': b}, **{'a': c})  # PIE804
+abc(a=1, **{'a': c}, **{'b': c})  # PIE804

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI018.py

@@ -1,8 +1,13 @@
 import typing
+import typing_extensions
 from typing import TypeVar
+from typing_extensions import ParamSpec, TypeVarTuple
 
 _T = typing.TypeVar("_T")
-_P = TypeVar("_P")
+_Ts = typing_extensions.TypeVarTuple("_Ts")
+_P = ParamSpec("_P")
+_P2 = typing.ParamSpec("_P2")
+_Ts2 = TypeVarTuple("_Ts2")
 
 # OK
 _UsedTypeVar = TypeVar("_UsedTypeVar")

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI018.pyi

@@ -1,8 +1,13 @@
 import typing
+import typing_extensions
 from typing import TypeVar
+from typing_extensions import ParamSpec, TypeVarTuple
 
 _T = typing.TypeVar("_T")
-_P = TypeVar("_P")
+_Ts = typing_extensions.TypeVarTuple("_Ts")
+_P = ParamSpec("_P")
+_P2 = typing.ParamSpec("_P2")
+_Ts2 = TypeVarTuple("_Ts2")
 
 # OK
 _UsedTypeVar = TypeVar("_UsedTypeVar")

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI042.py

@@ -22,3 +22,7 @@ Snake_case_alias: TypeAlias = int | float  # PYI042, since not camel case
 
 # check that this edge case doesn't crash
 _: TypeAlias = str | int
+
+# PEP 695
+type foo_bar = int | str
+type FooBar = int | str

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI042.pyi

@@ -22,3 +22,7 @@ Snake_case_alias: TypeAlias = int | float  # PYI042, since not camel case
 
 # check that this edge case doesn't crash
 _: TypeAlias = str | int
+
+# PEP 695
+type foo_bar = int | str
+type FooBar = int | str

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI043.py

@@ -21,3 +21,7 @@ _PrivateAliasS2: TypeAlias = Annotated[str, "also okay"]
 
 # check that this edge case doesn't crash
 _: TypeAlias = str | int
+
+# PEP 695
+type _FooT = str | int
+type Foo = str | int

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI043.pyi

@@ -21,3 +21,7 @@ _PrivateAliasS2: TypeAlias = Annotated[str, "also okay"]
 
 # check that this edge case doesn't crash
 _: TypeAlias = str | int
+
+# PEP 695
+type _FooT = str | int
+type Foo = str | int

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI050.pyi

@@ -10,3 +10,14 @@ def foo_no_return_typing_extensions(
 def foo_no_return_kwarg(arg: int, *, arg2: NoReturn): ...  # Error: PYI050
 def foo_no_return_pos_only(arg: int, /, arg2: NoReturn): ...  # Error: PYI050
 def foo_never(arg: Never): ...
+def foo_args(*args: NoReturn): ...  # Error: PYI050
+def foo_kwargs(**kwargs: NoReturn): ...  # Error: PYI050
+def foo_args_kwargs(*args: NoReturn, **kwargs: NoReturn): ...  # Error: PYI050
+def foo_int_args(*args: int): ...
+def foo_int_kwargs(**kwargs: int): ...
+def foo_int_args_kwargs(*args: int, **kwargs: int): ...
+def foo_int_args_no_return(*args: int, **kwargs: NoReturn): ...  # Error: PYI050
+def foo_int_kwargs_no_return(*args: NoReturn, **kwargs: int): ...  # Error: PYI050
+def foo_args_never(*args: Never): ...
+def foo_kwargs_never(**kwargs: Never): ...
+def foo_args_kwargs_never(*args: Never, **kwargs: Never): ...

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

@@ -32,6 +32,7 @@ def f8(x: bytes = b"50 character byte stringgggggggggggggggggggggggggg\xff") ->
 
 foo: str = "50 character stringggggggggggggggggggggggggggggggg"
 bar: str = "51 character stringgggggggggggggggggggggggggggggggg"
+baz: str = f"51 character stringgggggggggggggggggggggggggggggggg"
 
 baz: bytes = b"50 character byte stringgggggggggggggggggggggggggg"
 

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

@@ -29,6 +29,10 @@ baz: bytes = b"50 character byte stringgggggggggggggggggggggggggg"  # OK
 
 qux: bytes = b"51 character byte stringggggggggggggggggggggggggggg\xff"  # Error: PYI053
 
+ffoo: str = f"50 character stringggggggggggggggggggggggggggggggg"  # OK
+
+fbar: str = f"51 character stringgggggggggggggggggggggggggggggggg"  # Error: PYI053
+
 class Demo:
     """Docstrings are excluded from this rule. Some padding."""  # OK
 

crates/ruff_linter/resources/test/fixtures/flake8_pyi/PYI055.py

@@ -37,3 +37,28 @@ def func():
 
     # PYI055
     x: Union[type[requests_mock.Mocker], type[httpretty], type[str]] = requests_mock.Mocker
+
+
+def convert_union(union: UnionType) -> _T | None:
+    converters: tuple[
+        type[_T] | type[Converter[_T]] | Converter[_T] | Callable[[str], _T], ...  # PYI055
+    ] = union.__args__
+    ...
+
+def convert_union(union: UnionType) -> _T | None:
+    converters: tuple[
+        Union[type[_T] | type[Converter[_T]] | Converter[_T] | Callable[[str], _T]], ...  # PYI055
+    ] = union.__args__
+    ...
+
+def convert_union(union: UnionType) -> _T | None:
+    converters: tuple[
+        Union[type[_T] | type[Converter[_T]]] | Converter[_T] | Callable[[str], _T], ...  # PYI055
+    ] = union.__args__
+    ...
+
+def convert_union(union: UnionType) -> _T | None:
+    converters: tuple[
+        Union[type[_T] | type[Converter[_T]] | str] | Converter[_T] | Callable[[str], _T], ...  # PYI055
+    ] = union.__args__
+    ...

crates/ruff_linter/resources/test/fixtures/flake8_raise/RSE102.py

@@ -82,3 +82,14 @@ raise IndexError();
 
 # RSE102
 raise Foo()
+
+# OK
+raise ctypes.WinError()
+
+
+def func():
+    pass
+
+
+# OK
+raise func()

crates/ruff_linter/resources/test/fixtures/flake8_simplify/SIM300.py

@@ -1,6 +1,5 @@
 # Errors
 "yoda" == compare  # SIM300
-"yoda" == compare  # SIM300
 42 == age  # SIM300
 ("a", "b") == compare  # SIM300
 "yoda" <= compare  # SIM300
@@ -13,10 +12,17 @@ YODA > age  # SIM300
 YODA >= age  # SIM300
 JediOrder.YODA == age  # SIM300
 0 < (number - 100)  # SIM300
-SomeClass().settings.SOME_CONSTANT_VALUE > (60 * 60)  # SIM300
 B<A[0][0]or B
 B or(B)<A[0][0]
 
+# Errors in preview
+['upper'] == UPPER_LIST
+{} == DummyHandler.CONFIG
+
+# Errors in stable
+UPPER_LIST == ['upper']
+DummyHandler.CONFIG == {}
+
 # OK
 compare == "yoda"
 age == 42
@@ -31,3 +37,6 @@ age <= YODA
 YODA == YODA
 age == JediOrder.YODA
 (number - 100) > 0
+SECONDS_IN_DAY == 60 * 60 * 24 # Error in 0.1.8
+SomeClass().settings.SOME_CONSTANT_VALUE > (60 * 60) # Error in 0.1.8
+{"non-empty-dict": "is-ok"} == DummyHandler.CONFIG

crates/ruff_linter/resources/test/fixtures/flake8_trio/TRIO115.py

@@ -19,8 +19,32 @@ async def func():
     bar = "bar"
     trio.sleep(bar)
 
+    x, y = 0, 2000
+    trio.sleep(x)  # TRIO115
+    trio.sleep(y)  # OK
+
+    (a, b, [c, (d, e)]) = (1, 2, (0, [4, 0]))
+    trio.sleep(c)  # TRIO115
+    trio.sleep(d)  # OK
+    trio.sleep(e)  # TRIO115
+
+    m_x, m_y = 0
+    trio.sleep(m_y)  # OK
+    trio.sleep(m_x)  # OK
+
+    m_a = m_b = 0
+    trio.sleep(m_a)  # TRIO115
+    trio.sleep(m_b)  # TRIO115
+
+    m_c = (m_d, m_e) = (0, 0)
+    trio.sleep(m_c)  # OK
+    trio.sleep(m_d)  # TRIO115
+    trio.sleep(m_e)  # TRIO115
+
 
 def func():
+    import trio
+
     trio.run(trio.sleep(0))  # TRIO115
 
 
@@ -33,3 +57,10 @@ def func():
 
 async def func():
     await sleep(seconds=0)  # TRIO115
+
+
+def func():
+    import trio
+
+    if (walrus := 0) == 0:
+        trio.sleep(walrus)  # TRIO115

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/TCH006_1.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from typing import TypeVar
+
+
+x: "int" | str  # TCH006
+x: ("int" | str) | "bool"  # TCH006
+
+
+def func():
+    x: "int" | str  # OK
+
+
+z: list[str, str | "int"] = []  # TCH006
+
+type A = Value["int" | str]  # OK
+
+OldS = TypeVar('OldS', int | 'str', str)  # TCH006

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/TCH006_2.py

@@ -0,0 +1,16 @@
+from typing import TypeVar
+
+
+x: "int" | str  # TCH006
+x: ("int" | str) | "bool"  # TCH006
+
+
+def func():
+    x: "int" | str  # OK
+
+
+z: list[str, str | "int"] = []  # TCH006
+
+type A = Value["int" | str]  # OK
+
+OldS = TypeVar('OldS', int | 'str', str)  # TCH006

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/exempt_type_checking_1.py

@@ -0,0 +1,7 @@
+"""Add `TYPE_CHECKING` to an existing `typing` import. Another member is moved."""
+
+from __future__ import annotations
+
+from typing import Final
+
+Const: Final[dict] = {}

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/exempt_type_checking_2.py

@@ -0,0 +1,7 @@
+"""Using `TYPE_CHECKING` from an existing `typing` import. Another member is moved."""
+
+from __future__ import annotations
+
+from typing import Final, TYPE_CHECKING
+
+Const: Final[dict] = {}

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/exempt_type_checking_3.py

@@ -0,0 +1,7 @@
+"""Using `TYPE_CHECKING` from an existing `typing` import. Another member is moved."""
+
+from __future__ import annotations
+
+from typing import Final, Mapping
+
+Const: Final[dict] = {}

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/quote.py

@@ -0,0 +1,92 @@
+def f():
+    from pandas import DataFrame
+
+    def baz() -> DataFrame:
+        ...
+
+
+def f():
+    from pandas import DataFrame
+
+    def baz() -> DataFrame[int]:
+        ...
+
+
+def f():
+    from pandas import DataFrame
+
+    def baz() -> DataFrame["int"]:
+        ...
+
+
+def f():
+    import pandas as pd
+
+    def baz() -> pd.DataFrame:
+        ...
+
+
+def f():
+    import pandas as pd
+
+    def baz() -> pd.DataFrame.Extra:
+        ...
+
+
+def f():
+    import pandas as pd
+
+    def baz() -> pd.DataFrame | int:
+        ...
+
+
+
+def f():
+    from pandas import DataFrame
+
+    def baz() -> DataFrame():
+        ...
+
+
+def f():
+    from typing import Literal
+
+    from pandas import DataFrame
+
+    def baz() -> DataFrame[Literal["int"]]:
+        ...
+
+
+def f():
+    from typing import TYPE_CHECKING
+
+    if TYPE_CHECKING:
+        from pandas import DataFrame
+
+    def func(value: DataFrame):
+        ...
+
+
+def f():
+    from pandas import DataFrame, Series
+
+    def baz() -> DataFrame | Series:
+        ...
+
+
+def f():
+    from pandas import DataFrame, Series
+
+    def baz() -> (
+        DataFrame |
+        Series
+    ):
+        ...
+
+    class C:
+        x: DataFrame[
+            int
+        ] = 1
+
+    def func() -> DataFrame[[DataFrame[_P, _R]], DataFrame[_P, _R]]:
+        ...

crates/ruff_linter/resources/test/fixtures/isort/force_sort_within_sections_future.py

@@ -0,0 +1,2 @@
+import __future__
+from __future__ import annotations

crates/ruff_linter/resources/test/fixtures/isort/force_sort_within_sections_lines_between.py

@@ -0,0 +1,4 @@
+from a import x
+import b
+from c import y
+import d

crates/ruff_linter/resources/test/fixtures/isort/future_from.py

@@ -0,0 +1,2 @@
+import __future__
+from __future__ import annotations

crates/ruff_linter/resources/test/fixtures/pep8_naming/N806.py

@@ -52,3 +52,9 @@ def model_assign() -> None:
 
     Bad = import_string("django.core.exceptions.ValidationError")  # N806
     ValidationError = import_string("django.core.exceptions.ValidationError")  # OK
+
+    Bad = apps.get_model()  # N806
+    Bad = apps.get_model(model_name="Stream")  # N806
+
+    Address: Type = apps.get_model("zerver", variable)  # OK
+    ValidationError = import_string(variable)  # N806

crates/ruff_linter/resources/test/fixtures/perflint/PERF101.py

@@ -63,3 +63,8 @@ for i in list(foo_tuple):  # Ok
 
 for i in list(foo_set):  # Ok
     foo_set.append(i + 1)
+
+x, y, nested_tuple = (1, 2, (3, 4, 5))
+
+for i in list(nested_tuple):  # PERF101
+    pass

crates/ruff_linter/resources/test/fixtures/pycodestyle/E26.py

@@ -72,3 +72,15 @@ a = 42  #  (Two spaces)
 # EF  Means test is giving error and Failing
 #!   Means test is segfaulting
 # 8   Means test runs forever
+
+#: Colon prefix is okay
+
+###This is a variable ###
+
+# We should strip the space, but preserve the hashes.
+#: E266:1:3
+##  Foo
+
+a = 1  ## Foo
+
+a = 1  #:Foo

crates/ruff_linter/resources/test/fixtures/pycodestyle/E27.py

@@ -60,3 +60,6 @@ def f():
 if (a and
     b):
     pass
+#: Okay
+def f():
+	return 1

crates/ruff_linter/resources/test/fixtures/pycodestyle/E402.py

@@ -19,21 +19,32 @@ if x > 0:
 else:
     import e
 
-__some__magic = 1
+import sys
+sys.path.insert(0, "some/path")
 
 import f
 
+import matplotlib
+
+matplotlib.use("Agg")
+
+import g
+
+__some__magic = 1
+
+import h
+
 
 def foo() -> None:
-    import e
+    import i
 
 
 if __name__ == "__main__":
-    import g
+    import j
 
-import h; import i
+import k; import l
 
 
 if __name__ == "__main__":
-    import j; \
-import k
+    import m; \
+import n

crates/ruff_linter/resources/test/fixtures/pycodestyle/W605_0.py

@@ -43,3 +43,6 @@ regex = '''
 '''  # noqa
 
 regex = '\\\_'
+
+#: W605:1:7
+u'foo\ bar'

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

@@ -1,40 +1,54 @@
+# Same as `W605_0.py` but using f-strings instead.
+
 #: W605:1:10
-regex = '\.png$'
+regex = f'\.png$'
 
 #: W605:2:1
-regex = '''
+regex = f'''
 \.png$
 '''
 
 #: W605:2:6
 f(
-    '\_'
+    f'\_'
 )
 
 #: W605:4:6
-"""
+f"""
 multi-line
 literal
 with \_ somewhere
 in the middle
 """
 
+#: W605:1:38
+value = f'new line\nand invalid escape \_ here'
 
-def f():
-    #: W605:1:11
-    return'\.png$'
 
 #: Okay
-regex = r'\.png$'
-regex = '\\.png$'
-regex = r'''
+regex = fr'\.png$'
+regex = f'\\.png$'
+regex = fr'''
 \.png$
 '''
-regex = r'''
+regex = fr'''
 \\.png$
 '''
-s = '\\'
-regex = '\w'  # noqa
-regex = '''
+s = f'\\'
+regex = f'\w'  # noqa
+regex = f'''
 \w
 '''  # noqa
+
+regex = f'\\\_'
+value = f'\{{1}}'
+value = f'\{1}'
+value = f'{1:\}'
+value = f"{f"\{1}"}"
+value = rf"{f"\{1}"}"
+
+# Okay
+value = rf'\{{1}}'
+value = rf'\{1}'
+value = rf'{1:\}'
+value = f"{rf"\{1}"}"

crates/ruff_linter/resources/test/fixtures/pycodestyle/W605_2.py

@@ -1,54 +0,0 @@
-# Same as `W605_0.py` but using f-strings instead.
-
-#: W605:1:10
-regex = f'\.png$'
-
-#: W605:2:1
-regex = f'''
-\.png$
-'''
-
-#: W605:2:6
-f(
-    f'\_'
-)
-
-#: W605:4:6
-f"""
-multi-line
-literal
-with \_ somewhere
-in the middle
-"""
-
-#: W605:1:38
-value = f'new line\nand invalid escape \_ here'
-
-
-#: Okay
-regex = fr'\.png$'
-regex = f'\\.png$'
-regex = fr'''
-\.png$
-'''
-regex = fr'''
-\\.png$
-'''
-s = f'\\'
-regex = f'\w'  # noqa
-regex = f'''
-\w
-'''  # noqa
-
-regex = f'\\\_'
-value = f'\{{1}}'
-value = f'\{1}'
-value = f'{1:\}'
-value = f"{f"\{1}"}"
-value = rf"{f"\{1}"}"
-
-# Okay
-value = rf'\{{1}}'
-value = rf'\{1}'
-value = rf'{1:\}'
-value = f"{rf"\{1}"}"

crates/ruff_linter/resources/test/fixtures/pydocstyle/D.py

@@ -713,5 +713,12 @@ def retain_extra_whitespace_not_overindented():
 
     This is not overindented
         This is overindented, but since one line is not overindented this should not raise
-            And so is this, but it we should preserve the extra space on this line relative 
+            And so is this, but it we should preserve the extra space on this line relative
+    """
+
+
+def inconsistent_indent_byte_size():
+    """There's a non-breaking space (2-bytes) after 3 spaces (https://github.com/astral-sh/ruff/issues/9080).
+
+       Returns:
     """

crates/ruff_linter/resources/test/fixtures/pydocstyle/D208.py

@@ -1,5 +1,16 @@
+"""
+   Author
+"""
+
+
 class Platform:
     """ Remove sampler
             Args:
             Returns:
             """
+
+
+def memory_test():
+    """
+　　　参数含义：precision:精确到小数点后几位
+    """

crates/ruff_linter/resources/test/fixtures/pyflakes/F401_20.py

@@ -0,0 +1,4 @@
+import re
+from typing import Annotated
+
+type X = Annotated[int, lambda: re.compile("x")]

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

@@ -3,6 +3,11 @@ import subprocess
 # Errors.
 subprocess.run("ls")
 subprocess.run("ls", shell=True)
+subprocess.run(
+    ["ls"],
+    shell=False,
+)
+subprocess.run(["ls"], **kwargs)
 
 # Non-errors.
 subprocess.run("ls", check=True)

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

@@ -32,3 +32,16 @@ def f(x, y, z, *, u, v, w):  # Too many arguments (6/5)
 
 def f(x, y, z, a, b, c, *, u, v, w):  # Too many arguments (9/5)
     pass
+
+
+from typing import override, overload
+
+
+@override
+def f(x, y, z, a, b, c, *, u, v, w):  # OK
+    pass
+
+
+@overload
+def f(x, y, z, a, b, c, *, u, v, w):  # OK
+    pass

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

@@ -0,0 +1,36 @@
+def func() -> None:  # OK
+    # 15 is max default
+    first = 1
+    second = 2
+    third = 3
+    fourth = 4
+    fifth = 5
+    sixth = 6
+    seventh = 7
+    eighth = 8
+    ninth = 9
+    tenth = 10
+    eleventh = 11
+    twelveth = 12
+    thirteenth = 13
+    fourteenth = 14
+    fifteenth = 15
+
+
+def func() -> None:  # PLR0914
+    first = 1
+    second = 2
+    third = 3
+    fourth = 4
+    fifth = 5
+    sixth = 6
+    seventh = 7
+    eighth = 8
+    ninth = 9
+    tenth = 10
+    eleventh = 11
+    twelfth = 12
+    thirteenth = 13
+    fourteenth = 14
+    fifteenth = 15
+    sixteenth = 16

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

@@ -0,0 +1,30 @@
+def f(x, y, z, t, u, v, w, r):  # Too many positional arguments (8/3)
+    pass
+
+
+def f(x):  # OK
+    pass
+
+
+def f(x, y, z, _t, _u, _v, _w, r):  # OK (underscore-prefixed names are ignored
+    pass
+
+
+def f(x, y, z, *, u=1, v=1, r=1):  # OK
+    pass
+
+
+def f(x=1, y=1, z=1):  # OK
+    pass
+
+
+def f(x, y, z, /, u, v, w):  # Too many positional arguments (6/3)
+    pass
+
+
+def f(x, y, z, *, u, v, w):  # OK
+    pass
+
+
+def f(x, y, z, a, b, c, *, u, v, w):  # Too many positional arguments (6/3)
+    pass

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

@@ -0,0 +1,10 @@
+# Too many positional arguments (7/4) for max_positional=4
+# OK for dummy_variable_rgx ~ "skip_.*"
+def f(w, x, y, z, skip_t, skip_u, skip_v):
+    pass
+
+
+# Too many positional arguments (7/4) for max_args=4
+# Too many positional arguments (7/3) for dummy_variable_rgx ~ "skip_.*"
+def f(w, x, y, z, t, u, v):
+    pass

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

@@ -0,0 +1,40 @@
+FRUITS = {"apple": 1, "orange": 10, "berry": 22}
+
+def fix_these():
+    [FRUITS[fruit_name] for fruit_name, fruit_count in FRUITS.items()]  # PLR1733
+    {FRUITS[fruit_name] for fruit_name, fruit_count in FRUITS.items()}  # PLR1733
+    {fruit_name: FRUITS[fruit_name] for fruit_name, fruit_count in FRUITS.items()}  # PLR1733
+
+    for fruit_name, fruit_count in FRUITS.items():
+        print(FRUITS[fruit_name])  # PLR1733
+        blah = FRUITS[fruit_name]  # PLR1733
+        assert FRUITS[fruit_name] == "pear"  # PLR1733
+
+
+def dont_fix_these():
+    # once there is an assignment to the dict[index], we stop emitting diagnostics
+    for fruit_name, fruit_count in FRUITS.items():
+        FRUITS[fruit_name] = 0  # OK
+        assert FRUITS[fruit_name] == 0  # OK
+
+    # once there is an assignment to the key, we stop emitting diagnostics
+    for fruit_name, fruit_count in FRUITS.items():
+        fruit_name = 0  # OK
+        assert FRUITS[fruit_name] == 0  # OK
+
+    # once there is an assignment to the value, we stop emitting diagnostics
+    for fruit_name, fruit_count in FRUITS.items():
+        if fruit_count < 5:
+            fruit_count = -fruit_count
+        assert FRUITS[fruit_name] == 0  # OK
+
+
+def value_intentionally_unused():
+    [FRUITS[fruit_name] for fruit_name, _ in FRUITS.items()]  # OK
+    {FRUITS[fruit_name] for fruit_name, _ in FRUITS.items()}  # OK
+    {fruit_name: FRUITS[fruit_name] for fruit_name, _ in FRUITS.items()}  # OK
+
+    for fruit_name, _ in FRUITS.items():
+        print(FRUITS[fruit_name])  # OK
+        blah = FRUITS[fruit_name]  # OK
+        assert FRUITS[fruit_name] == "pear"  # OK

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

@@ -12,7 +12,7 @@ def fix_these():
         print(letters[index])  # PLR1736
         blah = letters[index]  # PLR1736
         assert letters[index]  == "d"  # PLR1736
-    
+
     for index, letter in builtins.enumerate(letters):
         print(letters[index])  # PLR1736
         blah = letters[index]  # PLR1736
@@ -22,38 +22,43 @@ def fix_these():
 def dont_fix_these():
     # once there is an assignment to the sequence[index], we stop emitting diagnostics
     for index, letter in enumerate(letters):
-        letters[index] = "d"  # Ok
-        letters[index] += "e"  # Ok
-        assert letters[index] == "de"  # Ok
-    
+        letters[index] = "d"  # OK
+        letters[index] += "e"  # OK
+        assert letters[index] == "de"  # OK
+
     # once there is an assignment to the index, we stop emitting diagnostics
     for index, letter in enumerate(letters):
-        index += 1  # Ok
-        print(letters[index])  # Ok
-    
+        index += 1  # OK
+        print(letters[index])  # OK
+
     # once there is an assignment to the sequence, we stop emitting diagnostics
     for index, letter in enumerate(letters):
-        letters = ["d", "e", "f"]  # Ok
-        print(letters[index])  # Ok
+        letters = ["d", "e", "f"]  # OK
+        print(letters[index])  # OK
+
+    # once there is an assignment to the value, we stop emitting diagnostics
+    for index, letter in enumerate(letters):
+        letter = "d"
+        print(letters[index])  # OK
 
     # once there is an deletion from or of the sequence or index, we stop emitting diagnostics
     for index, letter in enumerate(letters):
-        del letters[index]  # Ok
-        print(letters[index])  # Ok
+        del letters[index]  # OK
+        print(letters[index])  # OK
     for index, letter in enumerate(letters):
-        del letters  # Ok
-        print(letters[index])  # Ok
+        del letters  # OK
+        print(letters[index])  # OK
     for index, letter in enumerate(letters):
-        del index  # Ok
-        print(letters[index])  # Ok
+        del index  # OK
+        print(letters[index])  # OK
 
 
 def value_intentionally_unused():
-    [letters[index] for index, _ in enumerate(letters)]  # Ok
-    {letters[index] for index, _ in enumerate(letters)}  # Ok
-    {index: letters[index] for index, _ in enumerate(letters)}  # Ok
+    [letters[index] for index, _ in enumerate(letters)]  # OK
+    {letters[index] for index, _ in enumerate(letters)}  # OK
+    {index: letters[index] for index, _ in enumerate(letters)}  # OK
 
     for index, _ in enumerate(letters):
-        print(letters[index])  # Ok
-        blah = letters[index]  # Ok
-        letters[index] = "d"  # Ok
+        print(letters[index])  # OK
+        blah = letters[index]  # OK
+        letters[index] = "d"  # OK

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

@@ -42,3 +42,30 @@ tempfile.SpooledTemporaryFile(0, "w", encoding="utf-8")
 tempfile.SpooledTemporaryFile(0, "w", -1, "utf-8")
 tempfile.SpooledTemporaryFile(0, "wb")
 tempfile.SpooledTemporaryFile(0, )
+
+open("test.txt",)
+open()
+open(
+    "test.txt",  # comment
+)
+open(
+    "test.txt",
+    # comment
+)
+open(("test.txt"),)
+open(
+    ("test.txt"),  # comment
+)
+open(
+    ("test.txt"),
+    # comment
+)
+
+open((("test.txt")),)
+open(
+    (("test.txt")),  # comment
+)
+open(
+    (("test.txt")),
+    # comment
+)

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP031_0.py

@@ -110,3 +110,10 @@ print('Hello %(arg)s' % bar['bop'])
 "%s" % (
     x,  # comment
 )
+
+
+path = "%s-%s-%s.pem" % (
+    safe_domain_name(cn), # common name, which should be filename safe because it is IDNA-encoded, but in case of a malformed cert make sure it's ok to use as a filename
+    cert.not_valid_after.date().isoformat().replace("-", ""), # expiration date
+    hexlify(cert.fingerprint(hashes.SHA256())).decode("ascii")[0:8], # fingerprint prefix
+)

crates/ruff_linter/resources/test/fixtures/refurb/FURB118.py

@@ -0,0 +1,61 @@
+# Errors.
+op_bitnot = lambda x: ~x
+op_not = lambda x: not x
+op_pos = lambda x: +x
+op_neg = lambda x: -x
+
+op_add = lambda x, y: x + y
+op_sub = lambda x, y: x - y
+op_mult = lambda x, y: x * y
+op_matmutl = lambda x, y: x @ y
+op_truediv = lambda x, y: x / y
+op_mod = lambda x, y: x % y
+op_pow = lambda x, y: x ** y
+op_lshift = lambda x, y: x << y
+op_rshift = lambda x, y: x >> y
+op_bitor = lambda x, y: x | y
+op_xor = lambda x, y: x ^ y
+op_bitand = lambda x, y: x & y
+op_floordiv = lambda x, y: x // y
+
+op_eq = lambda x, y: x == y
+op_ne = lambda x, y: x != y
+op_lt = lambda x, y: x < y
+op_lte = lambda x, y: x <= y
+op_gt = lambda x, y: x > y
+op_gte = lambda x, y: x >= y
+op_is = lambda x, y: x is y
+op_isnot = lambda x, y: x is not y
+op_in = lambda x, y: y in x
+
+
+def op_not2(x):
+    return not x
+
+
+def op_add2(x, y):
+    return x + y
+
+
+class Adder:
+    def add(x, y):
+        return x + y
+
+# OK.
+op_add3 = lambda x, y = 1: x + y
+op_neg2 = lambda x, y: y - x
+op_notin = lambda x, y: y not in x
+op_and = lambda x, y: y and x
+op_or = lambda x, y: y or x
+op_in = lambda x, y: x in y
+
+
+def op_neg3(x, y):
+    return y - x
+
+def op_add4(x, y = 1):
+    return x + y
+
+def op_add5(x, y):
+    print("op_add5")
+    return x + y

crates/ruff_linter/resources/test/fixtures/refurb/FURB152.py

@@ -5,3 +5,11 @@ A = 3.14 * r ** 2  # FURB152
 C = 6.28 * r  # FURB152
 
 e = 2.71  # FURB152
+
+r = 3.15  # OK
+
+r = 3.141  # FURB152
+
+r = 3.1415  # FURB152
+
+e = 2.7 # OK

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

@@ -16,6 +16,8 @@ special_log(1, 2)
 special_log(1, 10)
 special_log(1, math.e)
 special_log(1, special_e)
+math.log(1, 2.0)
+math.log(1, 10.0)
 
 # Ok.
 math.log2(1)
@@ -45,3 +47,6 @@ def log(*args):
 log(1, 2)
 log(1, 10)
 log(1, math.e)
+
+math.log(1, 2.0001)
+math.log(1, 10.0001)

crates/ruff_linter/resources/test/fixtures/refurb/FURB181.py

@@ -0,0 +1,57 @@
+import hashlib
+from hashlib import (
+    blake2b,
+    blake2s,
+    md5,
+    sha1,
+    sha3_224,
+    sha3_256,
+    sha3_384,
+    sha3_512,
+    sha224,
+)
+from hashlib import sha256
+from hashlib import sha256 as hash_algo
+from hashlib import sha384, sha512, shake_128, shake_256
+
+# these will match
+
+blake2b().digest().hex()
+blake2s().digest().hex()
+md5().digest().hex()
+sha1().digest().hex()
+sha224().digest().hex()
+sha256().digest().hex()
+sha384().digest().hex()
+sha3_224().digest().hex()
+sha3_256().digest().hex()
+sha3_384().digest().hex()
+sha3_512().digest().hex()
+sha512().digest().hex()
+shake_128().digest(10).hex()
+shake_256().digest(10).hex()
+
+hashlib.sha256().digest().hex()
+
+sha256(b"text").digest().hex()
+
+hash_algo().digest().hex()
+
+# not yet supported
+h = sha256()
+h.digest().hex()
+
+
+# these will not
+
+sha256().digest()
+sha256().digest().hex("_")
+sha256().digest().hex(bytes_per_sep=4)
+sha256().hexdigest()
+
+class Hash:
+    def digest(self) -> bytes:
+        return b""
+
+
+Hash().digest().hex()

crates/ruff_linter/resources/test/fixtures/ruff/RUF006.py

@@ -63,11 +63,29 @@ def f():
     tasks = [asyncio.create_task(task) for task in tasks]
 
 
-# OK (false negative)
+# Error
 def f():
     task = asyncio.create_task(coordinator.ws_connect())
 
 
+# Error
+def f():
+    loop = asyncio.get_running_loop()
+    task: asyncio.Task = loop.create_task(coordinator.ws_connect())
+
+
+# OK (potential false negative)
+def f():
+    task = asyncio.create_task(coordinator.ws_connect())
+    background_tasks.add(task)
+
+
+# OK
+async def f():
+    task = asyncio.create_task(coordinator.ws_connect())
+    await task
+
+
 # OK (potential false negative)
 def f():
     do_nothing_with_the_task(asyncio.create_task(coordinator.ws_connect()))
@@ -88,3 +106,49 @@ def f():
 def f():
     loop = asyncio.get_running_loop()
     loop.do_thing(coordinator.ws_connect())
+
+
+# OK
+async def f():
+    task = unused = asyncio.create_task(coordinator.ws_connect())
+    await task
+
+
+# OK (false negative)
+async def f():
+    task = unused = asyncio.create_task(coordinator.ws_connect())
+
+
+# OK
+async def f():
+    task[i] = asyncio.create_task(coordinator.ws_connect())
+
+
+# OK
+async def f(x: int):
+    if x > 0:
+        task = asyncio.create_task(make_request())
+    else:
+        task = asyncio.create_task(make_request())
+    await task
+
+
+# OK
+async def f(x: bool):
+    if x:
+        t = asyncio.create_task(asyncio.sleep(1))
+    else:
+        t = None
+    try:
+        await asyncio.sleep(1)
+    finally:
+        if t:
+            await t
+
+
+# Error
+async def f(x: bool):
+    if x:
+        t = asyncio.create_task(asyncio.sleep(1))
+    else:
+        t = None

crates/ruff_linter/resources/test/fixtures/ruff/RUF012.py

@@ -59,3 +59,11 @@ class F(BaseSettings):
     without_annotation = []
     class_variable: ClassVar[list[int]] = []
     final_variable: Final[list[int]] = []
+
+
+class G(F):
+    mutable_default: list[int] = []
+    immutable_annotation: Sequence[int] = []
+    without_annotation = []
+    class_variable: ClassVar[list[int]] = []
+    final_variable: Final[list[int]] = []

crates/ruff_linter/resources/test/fixtures/ruff/RUF100_3.py

@@ -23,3 +23,6 @@ print(a)  # noqa: E501, F821 # comment
 print(a)  # noqa: E501, F821  # comment
 print(a)  # noqa: E501, F821 comment
 print(a)  # noqa: E501, F821  comment
+
+print(a)  # comment with unicode µ    # noqa: E501
+print(a)  # comment with unicode µ    # noqa: E501, F821

crates/ruff_linter/src/checkers/ast/analyze/deferred_lambdas.rs

@@ -2,7 +2,7 @@ use ruff_python_ast::Expr;
 
 use crate::checkers::ast::Checker;
 use crate::codes::Rule;
-use crate::rules::{flake8_pie, pylint};
+use crate::rules::{flake8_pie, pylint, refurb};
 
 /// Run lint rules over all deferred lambdas in the [`SemanticModel`].
 pub(crate) fn deferred_lambdas(checker: &mut Checker) {
@@ -21,6 +21,9 @@ pub(crate) fn deferred_lambdas(checker: &mut Checker) {
             if checker.enabled(Rule::ReimplementedContainerBuiltin) {
                 flake8_pie::rules::reimplemented_container_builtin(checker, lambda);
             }
+            if checker.enabled(Rule::ReimplementedOperator) {
+                refurb::rules::reimplemented_operator(checker, &lambda.into());
+            }
         }
     }
 }

crates/ruff_linter/src/checkers/ast/analyze/deferred_scopes.rs

@@ -5,16 +5,21 @@ use ruff_text_size::Ranged;
 
 use crate::checkers::ast::Checker;
 use crate::codes::Rule;
-use crate::rules::{flake8_pyi, flake8_type_checking, flake8_unused_arguments, pyflakes, pylint};
+use crate::rules::{
+    flake8_pyi, flake8_type_checking, flake8_unused_arguments, pyflakes, pylint, ruff,
+};
 
 /// Run lint rules over all deferred scopes in the [`SemanticModel`].
 pub(crate) fn deferred_scopes(checker: &mut Checker) {
     if !checker.any_enabled(&[
+        Rule::AsyncioDanglingTask,
         Rule::GlobalVariableNotAssigned,
         Rule::ImportShadowedByLoopVar,
+        Rule::NoSelfUse,
         Rule::RedefinedArgumentFromLocal,
         Rule::RedefinedWhileUnused,
         Rule::RuntimeImportInTypeCheckingBlock,
+        Rule::TooManyLocals,
         Rule::TypingOnlyFirstPartyImport,
         Rule::TypingOnlyStandardLibraryImport,
         Rule::TypingOnlyThirdPartyImport,
@@ -31,7 +36,6 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
         Rule::UnusedPrivateTypedDict,
         Rule::UnusedStaticMethodArgument,
         Rule::UnusedVariable,
-        Rule::NoSelfUse,
     ]) {
         return;
     }
@@ -59,6 +63,7 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
                         flake8_type_checking::helpers::is_valid_runtime_import(
                             binding,
                             &checker.semantic,
+                            &checker.settings.flake8_type_checking,
                         )
                     })
                     .collect()
@@ -268,6 +273,10 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
             flake8_pyi::rules::unused_private_typed_dict(checker, scope, &mut diagnostics);
         }
 
+        if checker.enabled(Rule::AsyncioDanglingTask) {
+            ruff::rules::asyncio_dangling_binding(scope, &checker.semantic, &mut diagnostics);
+        }
+
         if matches!(scope.kind, ScopeKind::Function(_) | ScopeKind::Lambda(_)) {
             if checker.enabled(Rule::UnusedVariable) {
                 pyflakes::rules::unused_variable(checker, scope, &mut diagnostics);
@@ -335,6 +344,10 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
             if checker.enabled(Rule::NoSelfUse) {
                 pylint::rules::no_self_use(checker, scope_id, scope, &mut diagnostics);
             }
+
+            if checker.enabled(Rule::TooManyLocals) {
+                pylint::rules::too_many_locals(checker, scope, &mut diagnostics);
+            }
         }
     }
     checker.diagnostics.extend(diagnostics);

crates/ruff_linter/src/checkers/ast/analyze/expression.rs

@@ -15,8 +15,9 @@ use crate::rules::{
     flake8_comprehensions, flake8_datetimez, flake8_debugger, flake8_django,
     flake8_future_annotations, flake8_gettext, flake8_implicit_str_concat, flake8_logging,
     flake8_logging_format, flake8_pie, flake8_print, flake8_pyi, flake8_pytest_style, flake8_self,
-    flake8_simplify, flake8_tidy_imports, flake8_trio, flake8_use_pathlib, flynt, numpy,
-    pandas_vet, pep8_naming, pycodestyle, pyflakes, pygrep_hooks, pylint, pyupgrade, refurb, ruff,
+    flake8_simplify, flake8_tidy_imports, flake8_trio, flake8_type_checking, flake8_use_pathlib,
+    flynt, numpy, pandas_vet, pep8_naming, pycodestyle, pyflakes, pygrep_hooks, pylint, pyupgrade,
+    refurb, ruff,
 };
 use crate::settings::types::PythonVersion;
 
@@ -356,6 +357,8 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
                 Rule::FString,
                 // flynt
                 Rule::StaticJoinToFString,
+                // refurb
+                Rule::HashlibDigestHex,
             ]) {
                 if let Expr::Attribute(ast::ExprAttribute { value, attr, .. }) = func.as_ref() {
                     let attr = attr.as_str();
@@ -543,7 +546,7 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
                 flake8_bugbear::rules::no_explicit_stacklevel(checker, call);
             }
             if checker.enabled(Rule::UnnecessaryDictKwargs) {
-                flake8_pie::rules::unnecessary_dict_kwargs(checker, expr, keywords);
+                flake8_pie::rules::unnecessary_dict_kwargs(checker, call);
             }
             if checker.enabled(Rule::UnnecessaryRangeStart) {
                 flake8_pie::rules::unnecessary_range_start(checker, call);
@@ -581,6 +584,9 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
             if checker.enabled(Rule::HashlibInsecureHashFunction) {
                 flake8_bandit::rules::hashlib_insecure_hash_functions(checker, call);
             }
+            if checker.enabled(Rule::HashlibDigestHex) {
+                refurb::rules::hashlib_digest_hex(checker, call);
+            }
             if checker.enabled(Rule::RequestWithoutTimeout) {
                 flake8_bandit::rules::request_without_timeout(checker, call);
             }
@@ -1165,6 +1171,9 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
                 if checker.enabled(Rule::UnnecessaryTypeUnion) {
                     flake8_pyi::rules::unnecessary_type_union(checker, expr);
                 }
+                if checker.enabled(Rule::RuntimeStringUnion) {
+                    flake8_type_checking::rules::runtime_string_union(checker, expr);
+                }
             }
         }
         Expr::UnaryOp(
@@ -1270,32 +1279,12 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
                 refurb::rules::math_constant(checker, number_literal);
             }
         }
-        Expr::BytesLiteral(_) => {
-            if checker.source_type.is_stub() && checker.enabled(Rule::StringOrBytesTooLong) {
-                flake8_pyi::rules::string_or_bytes_too_long(checker, expr);
-            }
-        }
-        Expr::StringLiteral(string) => {
-            if checker.enabled(Rule::HardcodedBindAllInterfaces) {
-                if let Some(diagnostic) =
-                    flake8_bandit::rules::hardcoded_bind_all_interfaces(string)
-                {
-                    checker.diagnostics.push(diagnostic);
-                }
-            }
-            if checker.enabled(Rule::HardcodedTempFile) {
-                flake8_bandit::rules::hardcoded_tmp_directory(checker, string);
-            }
+        Expr::StringLiteral(ast::ExprStringLiteral { value, .. }) => {
             if checker.enabled(Rule::UnicodeKindPrefix) {
-                for string_part in string.value.parts() {
+                for string_part in value {
                     pyupgrade::rules::unicode_kind_prefix(checker, string_part);
                 }
             }
-            if checker.source_type.is_stub() {
-                if checker.enabled(Rule::StringOrBytesTooLong) {
-                    flake8_pyi::rules::string_or_bytes_too_long(checker, expr);
-                }
-            }
         }
         Expr::IfExp(
             if_exp @ ast::ExprIfExp {
@@ -1333,6 +1322,9 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
             if checker.enabled(Rule::UnnecessaryListIndexLookup) {
                 pylint::rules::unnecessary_list_index_lookup_comprehension(checker, expr);
             }
+            if checker.enabled(Rule::UnnecessaryDictIndexLookup) {
+                pylint::rules::unnecessary_dict_index_lookup_comprehension(checker, expr);
+            }
             if checker.enabled(Rule::UnnecessaryComprehension) {
                 flake8_comprehensions::rules::unnecessary_list_set_comprehension(
                     checker, expr, elt, generators,
@@ -1360,6 +1352,9 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
             if checker.enabled(Rule::UnnecessaryListIndexLookup) {
                 pylint::rules::unnecessary_list_index_lookup_comprehension(checker, expr);
             }
+            if checker.enabled(Rule::UnnecessaryDictIndexLookup) {
+                pylint::rules::unnecessary_dict_index_lookup_comprehension(checker, expr);
+            }
             if checker.enabled(Rule::UnnecessaryComprehension) {
                 flake8_comprehensions::rules::unnecessary_list_set_comprehension(
                     checker, expr, elt, generators,
@@ -1386,6 +1381,9 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
             if checker.enabled(Rule::UnnecessaryListIndexLookup) {
                 pylint::rules::unnecessary_list_index_lookup_comprehension(checker, expr);
             }
+            if checker.enabled(Rule::UnnecessaryDictIndexLookup) {
+                pylint::rules::unnecessary_dict_index_lookup_comprehension(checker, expr);
+            }
             if checker.enabled(Rule::UnnecessaryComprehension) {
                 flake8_comprehensions::rules::unnecessary_dict_comprehension(
                     checker, expr, key, value, generators,
@@ -1413,6 +1411,9 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
             if checker.enabled(Rule::UnnecessaryListIndexLookup) {
                 pylint::rules::unnecessary_list_index_lookup_comprehension(checker, expr);
             }
+            if checker.enabled(Rule::UnnecessaryDictIndexLookup) {
+                pylint::rules::unnecessary_dict_index_lookup_comprehension(checker, expr);
+            }
             if checker.enabled(Rule::FunctionUsesLoopVariable) {
                 flake8_bugbear::rules::function_uses_loop_variable(checker, &Node::Expr(expr));
             }

crates/ruff_linter/src/checkers/ast/analyze/mod.rs

@@ -10,6 +10,7 @@ pub(super) use module::module;
 pub(super) use parameter::parameter;
 pub(super) use parameters::parameters;
 pub(super) use statement::statement;
+pub(super) use string_like::string_like;
 pub(super) use suite::suite;
 pub(super) use unresolved_references::unresolved_references;
 
@@ -25,5 +26,6 @@ mod module;
 mod parameter;
 mod parameters;
 mod statement;
+mod string_like;
 mod suite;
 mod unresolved_references;

crates/ruff_linter/src/checkers/ast/analyze/statement.rs

@@ -248,7 +248,10 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 pylint::rules::property_with_parameters(checker, stmt, decorator_list, parameters);
             }
             if checker.enabled(Rule::TooManyArguments) {
-                pylint::rules::too_many_arguments(checker, parameters, stmt);
+                pylint::rules::too_many_arguments(checker, function_def);
+            }
+            if checker.enabled(Rule::TooManyPositional) {
+                pylint::rules::too_many_positional(checker, function_def);
             }
             if checker.enabled(Rule::TooManyReturnStatements) {
                 if let Some(diagnostic) = pylint::rules::too_many_return_statements(
@@ -365,6 +368,9 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                     .diagnostics
                     .extend(ruff::rules::unreachable::in_function(name, body));
             }
+            if checker.enabled(Rule::ReimplementedOperator) {
+                refurb::rules::reimplemented_operator(checker, &function_def.into());
+            }
         }
         Stmt::Return(_) => {
             if checker.enabled(Rule::ReturnOutsideFunction) {
@@ -394,27 +400,13 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 flake8_django::rules::nullable_model_string_field(checker, body);
             }
             if checker.enabled(Rule::DjangoExcludeWithModelForm) {
-                if let Some(diagnostic) = flake8_django::rules::exclude_with_model_form(
-                    checker,
-                    arguments.as_deref(),
-                    body,
-                ) {
-                    checker.diagnostics.push(diagnostic);
-                }
+                flake8_django::rules::exclude_with_model_form(checker, class_def);
             }
             if checker.enabled(Rule::DjangoAllWithModelForm) {
-                if let Some(diagnostic) =
-                    flake8_django::rules::all_with_model_form(checker, arguments.as_deref(), body)
-                {
-                    checker.diagnostics.push(diagnostic);
-                }
+                flake8_django::rules::all_with_model_form(checker, class_def);
             }
             if checker.enabled(Rule::DjangoUnorderedBodyContentInModel) {
-                flake8_django::rules::unordered_body_content_in_model(
-                    checker,
-                    arguments.as_deref(),
-                    body,
-                );
+                flake8_django::rules::unordered_body_content_in_model(checker, class_def);
             }
             if !checker.source_type.is_stub() {
                 if checker.enabled(Rule::DjangoModelWithoutDunderStr) {
@@ -1280,6 +1272,9 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             if checker.enabled(Rule::UnnecessaryListIndexLookup) {
                 pylint::rules::unnecessary_list_index_lookup(checker, for_stmt);
             }
+            if checker.enabled(Rule::UnnecessaryDictIndexLookup) {
+                pylint::rules::unnecessary_dict_index_lookup(checker, for_stmt);
+            }
             if !is_async {
                 if checker.enabled(Rule::ReimplementedBuiltin) {
                     flake8_simplify::rules::convert_for_loop_to_any_all(checker, stmt);
@@ -1531,6 +1526,14 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 }
             }
         }
+        Stmt::TypeAlias(ast::StmtTypeAlias { name, .. }) => {
+            if checker.enabled(Rule::SnakeCaseTypeAlias) {
+                flake8_pyi::rules::snake_case_type_alias(checker, name);
+            }
+            if checker.enabled(Rule::TSuffixedTypeAlias) {
+                flake8_pyi::rules::t_suffixed_type_alias(checker, name);
+            }
+        }
         Stmt::Delete(delete @ ast::StmtDelete { targets, range: _ }) => {
             if checker.enabled(Rule::GlobalStatement) {
                 for target in targets {
@@ -1557,7 +1560,11 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 pylint::rules::named_expr_without_context(checker, value);
             }
             if checker.enabled(Rule::AsyncioDanglingTask) {
-                ruff::rules::asyncio_dangling_task(checker, value);
+                if let Some(diagnostic) =
+                    ruff::rules::asyncio_dangling_task(value, checker.semantic())
+                {
+                    checker.diagnostics.push(diagnostic);
+                }
             }
             if checker.enabled(Rule::RepeatedAppend) {
                 refurb::rules::repeated_append(checker, stmt);

crates/ruff_linter/src/checkers/ast/analyze/string_like.rs

@@ -0,0 +1,20 @@
+use ruff_python_ast::StringLike;
+
+use crate::checkers::ast::Checker;
+use crate::codes::Rule;
+use crate::rules::{flake8_bandit, flake8_pyi};
+
+/// Run lint rules over a [`StringLike`] syntax nodes.
+pub(crate) fn string_like(string_like: StringLike, checker: &mut Checker) {
+    if checker.enabled(Rule::HardcodedBindAllInterfaces) {
+        flake8_bandit::rules::hardcoded_bind_all_interfaces(checker, string_like);
+    }
+    if checker.enabled(Rule::HardcodedTempFile) {
+        flake8_bandit::rules::hardcoded_tmp_directory(checker, string_like);
+    }
+    if checker.source_type.is_stub() {
+        if checker.enabled(Rule::StringOrBytesTooLong) {
+            flake8_pyi::rules::string_or_bytes_too_long(checker, string_like);
+        }
+    }
+}

crates/ruff_linter/src/checkers/ast/annotation.rs

@@ -0,0 +1,66 @@
+use ruff_python_semantic::{ScopeKind, SemanticModel};
+
+use crate::rules::flake8_type_checking;
+use crate::settings::LinterSettings;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub(super) enum AnnotationContext {
+    /// Python will evaluate the annotation at runtime, but it's not _required_ and, as such, could
+    /// be quoted to convert it into a typing-only annotation.
+    ///
+    /// For example:
+    /// ```python
+    /// from pandas import DataFrame
+    ///
+    /// def foo() -> DataFrame:
+    ///    ...
+    /// ```
+    ///
+    /// Above, Python will evaluate `DataFrame` at runtime in order to add it to `__annotations__`.
+    RuntimeEvaluated,
+    /// Python will evaluate the annotation at runtime, and it's required to be available at
+    /// runtime, as a library (like Pydantic) needs access to it.
+    RuntimeRequired,
+    /// The annotation is only evaluated at type-checking time.
+    TypingOnly,
+}
+
+impl AnnotationContext {
+    pub(super) fn from_model(semantic: &SemanticModel, settings: &LinterSettings) -> Self {
+        // If the annotation is in a class scope (e.g., an annotated assignment for a
+        // class field), and that class is marked as annotation as runtime-required.
+        if semantic
+            .current_scope()
+            .kind
+            .as_class()
+            .is_some_and(|class_def| {
+                flake8_type_checking::helpers::runtime_required_class(
+                    class_def,
+                    &settings.flake8_type_checking.runtime_required_base_classes,
+                    &settings.flake8_type_checking.runtime_required_decorators,
+                    semantic,
+                )
+            })
+        {
+            return Self::RuntimeRequired;
+        }
+
+        // If `__future__` annotations are enabled, then annotations are never evaluated
+        // at runtime, so we can treat them as typing-only.
+        if semantic.future_annotations() {
+            return Self::TypingOnly;
+        }
+
+        // Otherwise, if we're in a class or module scope, then the annotation needs to
+        // be available at runtime.
+        // See: https://docs.python.org/3/reference/simple_stmts.html#annotated-assignment-statements
+        if matches!(
+            semantic.current_scope().kind,
+            ScopeKind::Class(_) | ScopeKind::Module
+        ) {
+            return Self::RuntimeEvaluated;
+        }
+
+        Self::TypingOnly
+    }
+}

crates/ruff_linter/src/checkers/ast/mod.rs

@@ -44,12 +44,12 @@ use ruff_python_ast::helpers::{
 };
 use ruff_python_ast::identifier::Identifier;
 use ruff_python_ast::str::trailing_quote;
-use ruff_python_ast::visitor::{walk_except_handler, walk_pattern, Visitor};
+use ruff_python_ast::visitor::{walk_except_handler, walk_f_string_element, walk_pattern, Visitor};
 use ruff_python_ast::{helpers, str, visitor, PySourceType};
 use ruff_python_codegen::{Generator, Quote, Stylist};
 use ruff_python_index::Indexer;
 use ruff_python_parser::typing::{parse_type_annotation, AnnotationKind};
-use ruff_python_semantic::analyze::{typing, visibility};
+use ruff_python_semantic::analyze::{imports, typing, visibility};
 use ruff_python_semantic::{
     BindingFlags, BindingId, BindingKind, Exceptions, Export, FromImport, Globals, Import, Module,
     ModuleKind, NodeId, ScopeId, ScopeKind, SemanticModel, SemanticModelFlags, Snapshot,
@@ -58,6 +58,7 @@ use ruff_python_semantic::{
 use ruff_python_stdlib::builtins::{IPYTHON_BUILTINS, MAGIC_GLOBALS, PYTHON_BUILTINS};
 use ruff_source_file::Locator;
 
+use crate::checkers::ast::annotation::AnnotationContext;
 use crate::checkers::ast::deferred::Deferred;
 use crate::docstrings::extraction::ExtractionTarget;
 use crate::importer::Importer;
@@ -68,6 +69,7 @@ use crate::settings::{flags, LinterSettings};
 use crate::{docstrings, noqa};
 
 mod analyze;
+mod annotation;
 mod deferred;
 
 pub(crate) struct Checker<'a> {
@@ -303,9 +305,12 @@ where
             }
             _ => {
                 self.semantic.flags |= SemanticModelFlags::FUTURES_BOUNDARY;
-                if !self.semantic.seen_import_boundary()
-                    && !helpers::is_assignment_to_a_dunder(stmt)
-                    && !helpers::in_nested_block(self.semantic.current_statements())
+                if !(self.semantic.seen_import_boundary()
+                    || helpers::is_assignment_to_a_dunder(stmt)
+                    || helpers::in_nested_block(self.semantic.current_statements())
+                    || imports::is_matplotlib_activation(stmt, self.semantic())
+                    || self.settings.preview.is_enabled()
+                        && imports::is_sys_path_modification(stmt, self.semantic()))
                 {
                     self.semantic.flags |= SemanticModelFlags::IMPORT_BOUNDARY;
                 }
@@ -512,8 +517,10 @@ where
                     .chain(&parameters.kwonlyargs)
                 {
                     if let Some(expr) = &parameter_with_default.parameter.annotation {
-                        if runtime_annotation || singledispatch {
-                            self.visit_runtime_annotation(expr);
+                        if singledispatch {
+                            self.visit_runtime_required_annotation(expr);
+                        } else if runtime_annotation {
+                            self.visit_runtime_evaluated_annotation(expr);
                         } else {
                             self.visit_annotation(expr);
                         };
@@ -526,7 +533,7 @@ where
                 if let Some(arg) = &parameters.vararg {
                     if let Some(expr) = &arg.annotation {
                         if runtime_annotation {
-                            self.visit_runtime_annotation(expr);
+                            self.visit_runtime_evaluated_annotation(expr);
                         } else {
                             self.visit_annotation(expr);
                         };
@@ -535,7 +542,7 @@ where
                 if let Some(arg) = &parameters.kwarg {
                     if let Some(expr) = &arg.annotation {
                         if runtime_annotation {
-                            self.visit_runtime_annotation(expr);
+                            self.visit_runtime_evaluated_annotation(expr);
                         } else {
                             self.visit_annotation(expr);
                         };
@@ -543,7 +550,7 @@ where
                 }
                 for expr in returns {
                     if runtime_annotation {
-                        self.visit_runtime_annotation(expr);
+                        self.visit_runtime_evaluated_annotation(expr);
                     } else {
                         self.visit_annotation(expr);
                     };
@@ -674,40 +681,16 @@ where
                 value,
                 ..
             }) => {
-                // If we're in a class or module scope, then the annotation needs to be
-                // available at runtime.
-                // See: https://docs.python.org/3/reference/simple_stmts.html#annotated-assignment-statements
-                let runtime_annotation = if self.semantic.future_annotations() {
-                    self.semantic
-                        .current_scope()
-                        .kind
-                        .as_class()
-                        .is_some_and(|class_def| {
-                            flake8_type_checking::helpers::runtime_evaluated_class(
-                                class_def,
-                                &self
-                                    .settings
-                                    .flake8_type_checking
-                                    .runtime_evaluated_base_classes,
-                                &self
-                                    .settings
-                                    .flake8_type_checking
-                                    .runtime_evaluated_decorators,
-                                &self.semantic,
-                            )
-                        })
-                } else {
-                    matches!(
-                        self.semantic.current_scope().kind,
-                        ScopeKind::Class(_) | ScopeKind::Module
-                    )
-                };
-
-                if runtime_annotation {
-                    self.visit_runtime_annotation(annotation);
-                } else {
-                    self.visit_annotation(annotation);
+                match AnnotationContext::from_model(&self.semantic, self.settings) {
+                    AnnotationContext::RuntimeRequired => {
+                        self.visit_runtime_required_annotation(annotation);
+                    }
+                    AnnotationContext::RuntimeEvaluated => {
+                        self.visit_runtime_evaluated_annotation(annotation);
+                    }
+                    AnnotationContext::TypingOnly => self.visit_annotation(annotation),
                 }
+
                 if let Some(expr) = value {
                     if self.semantic.match_typing_expr(annotation, "TypeAlias") {
                         self.visit_type_definition(expr);
@@ -815,8 +798,7 @@ where
 
     fn visit_expr(&mut self, expr: &'b Expr) {
         // Step 0: Pre-processing
-        if !self.semantic.in_f_string()
-            && !self.semantic.in_literal()
+        if !self.semantic.in_typing_literal()
             && !self.semantic.in_deferred_type_definition()
             && self.semantic.in_type_definition()
             && self.semantic.future_annotations()
@@ -1198,7 +1180,7 @@ where
                     ) {
                         // Ex) Literal["Class"]
                         Some(typing::SubscriptKind::Literal) => {
-                            self.semantic.flags |= SemanticModelFlags::LITERAL;
+                            self.semantic.flags |= SemanticModelFlags::TYPING_LITERAL;
 
                             self.visit_expr(slice);
                             self.visit_expr_context(ctx);
@@ -1238,10 +1220,7 @@ where
                 }
             }
             Expr::StringLiteral(ast::ExprStringLiteral { value, .. }) => {
-                if self.semantic.in_type_definition()
-                    && !self.semantic.in_literal()
-                    && !self.semantic.in_f_string()
-                {
+                if self.semantic.in_type_definition() && !self.semantic.in_typing_literal() {
                     self.deferred.string_type_definitions.push((
                         expr.range(),
                         value.to_str(),
@@ -1271,6 +1250,13 @@ where
 
         // Step 4: Analysis
         analyze::expression(expr, self);
+        match expr {
+            Expr::StringLiteral(string_literal) => {
+                analyze::string_like(string_literal.into(), self);
+            }
+            Expr::BytesLiteral(bytes_literal) => analyze::string_like(bytes_literal.into(), self),
+            _ => {}
+        }
 
         self.semantic.flags = flags_snapshot;
         self.semantic.pop_node();
@@ -1326,17 +1312,6 @@ where
         self.semantic.flags = flags_snapshot;
     }
 
-    fn visit_format_spec(&mut self, format_spec: &'b Expr) {
-        match format_spec {
-            Expr::FString(ast::ExprFString { value, .. }) => {
-                for expr in value.elements() {
-                    self.visit_expr(expr);
-                }
-            }
-            _ => unreachable!("Unexpected expression for format_spec"),
-        }
-    }
-
     fn visit_parameters(&mut self, parameters: &'b Parameters) {
         // Step 1: Binding.
         // Bind, but intentionally avoid walking default expressions, as we handle them
@@ -1446,6 +1421,16 @@ where
                 .push((bound, self.semantic.snapshot()));
         }
     }
+
+    fn visit_f_string_element(&mut self, f_string_element: &'b ast::FStringElement) {
+        // Step 2: Traversal
+        walk_f_string_element(self, f_string_element);
+
+        // Step 4: Analysis
+        if let Some(literal) = f_string_element.as_literal() {
+            analyze::string_like(literal.into(), self);
+        }
+    }
 }
 
 impl<'a> Checker<'a> {
@@ -1522,10 +1507,18 @@ impl<'a> Checker<'a> {
         self.semantic.flags = snapshot;
     }
 
-    /// Visit an [`Expr`], and treat it as a runtime-required type annotation.
-    fn visit_runtime_annotation(&mut self, expr: &'a Expr) {
+    /// Visit an [`Expr`], and treat it as a runtime-evaluated type annotation.
+    fn visit_runtime_evaluated_annotation(&mut self, expr: &'a Expr) {
         let snapshot = self.semantic.flags;
-        self.semantic.flags |= SemanticModelFlags::RUNTIME_ANNOTATION;
+        self.semantic.flags |= SemanticModelFlags::RUNTIME_EVALUATED_ANNOTATION;
+        self.visit_type_definition(expr);
+        self.semantic.flags = snapshot;
+    }
+
+    /// Visit an [`Expr`], and treat it as a runtime-required type annotation.
+    fn visit_runtime_required_annotation(&mut self, expr: &'a Expr) {
+        let snapshot = self.semantic.flags;
+        self.semantic.flags |= SemanticModelFlags::RUNTIME_REQUIRED_ANNOTATION;
         self.visit_type_definition(expr);
         self.semantic.flags = snapshot;
     }
@@ -2020,13 +2013,15 @@ pub(crate) fn check_ast(
     // Iterate over the AST.
     checker.visit_body(python_ast);
 
-    // Visit any deferred syntax nodes.
+    // Visit any deferred syntax nodes. Take care to visit in order, such that we avoid adding
+    // new deferred nodes after visiting nodes of that kind. For example, visiting a deferred
+    // function can add a deferred lambda, but the opposite is not true.
     checker.visit_deferred_functions();
-    checker.visit_deferred_lambdas();
-    checker.visit_deferred_future_type_definitions();
     checker.visit_deferred_type_param_definitions();
+    checker.visit_deferred_future_type_definitions();
     let allocator = typed_arena::Arena::new();
     checker.visit_deferred_string_type_definitions(&allocator);
+    checker.visit_deferred_lambdas();
     checker.visit_exports();
 
     // Check docstrings, bindings, and unresolved references.

crates/ruff_linter/src/checkers/noqa.rs

@@ -3,10 +3,10 @@
 use std::path::Path;
 
 use itertools::Itertools;
-use ruff_text_size::{Ranged, TextLen, TextRange, TextSize};
+use ruff_text_size::{Ranged, TextLen, TextRange};
 
 use ruff_diagnostics::{Diagnostic, Edit, Fix};
-use ruff_python_trivia::CommentRanges;
+use ruff_python_trivia::{CommentRanges, PythonWhitespace};
 use ruff_source_file::Locator;
 
 use crate::noqa;
@@ -200,17 +200,11 @@ fn delete_noqa(range: TextRange, locator: &Locator) -> Edit {
 
     // Compute the leading space.
     let prefix = locator.slice(TextRange::new(line_range.start(), range.start()));
-    let leading_space = prefix
-        .rfind(|c: char| !c.is_whitespace())
-        .map_or(prefix.len(), |i| prefix.len() - i - 1);
-    let leading_space_len = TextSize::try_from(leading_space).unwrap();
+    let leading_space_len = prefix.text_len() - prefix.trim_whitespace_end().text_len();
 
     // Compute the trailing space.
     let suffix = locator.slice(TextRange::new(range.end(), line_range.end()));
-    let trailing_space = suffix
-        .find(|c: char| !c.is_whitespace())
-        .map_or(suffix.len(), |i| i);
-    let trailing_space_len = TextSize::try_from(trailing_space).unwrap();
+    let trailing_space_len = suffix.text_len() - suffix.trim_whitespace_start().text_len();
 
     // Ex) `# noqa`
     if line_range

crates/ruff_linter/src/codes.rs

@@ -252,14 +252,17 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Pylint, "R0911") => (RuleGroup::Stable, rules::pylint::rules::TooManyReturnStatements),
         (Pylint, "R0912") => (RuleGroup::Stable, rules::pylint::rules::TooManyBranches),
         (Pylint, "R0913") => (RuleGroup::Stable, rules::pylint::rules::TooManyArguments),
+        (Pylint, "R0914") => (RuleGroup::Preview, rules::pylint::rules::TooManyLocals),
         (Pylint, "R0915") => (RuleGroup::Stable, rules::pylint::rules::TooManyStatements),
         (Pylint, "R0916") => (RuleGroup::Preview, rules::pylint::rules::TooManyBooleanExpressions),
+        (Pylint, "R0917") => (RuleGroup::Preview, rules::pylint::rules::TooManyPositional),
         (Pylint, "R1701") => (RuleGroup::Stable, rules::pylint::rules::RepeatedIsinstanceCalls),
         (Pylint, "R1704") => (RuleGroup::Preview, rules::pylint::rules::RedefinedArgumentFromLocal),
         (Pylint, "R1711") => (RuleGroup::Stable, rules::pylint::rules::UselessReturn),
         (Pylint, "R1714") => (RuleGroup::Stable, rules::pylint::rules::RepeatedEqualityComparison),
         (Pylint, "R1706") => (RuleGroup::Preview, rules::pylint::rules::AndOrTernary),
         (Pylint, "R1722") => (RuleGroup::Stable, rules::pylint::rules::SysExitAlias),
+        (Pylint, "R1733") => (RuleGroup::Preview, rules::pylint::rules::UnnecessaryDictIndexLookup),
         (Pylint, "R1736") => (RuleGroup::Preview, rules::pylint::rules::UnnecessaryListIndexLookup),
         (Pylint, "R2004") => (RuleGroup::Stable, rules::pylint::rules::MagicValueComparison),
         (Pylint, "R5501") => (RuleGroup::Stable, rules::pylint::rules::CollapsibleElseIf),
@@ -805,6 +808,7 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Flake8TypeChecking, "003") => (RuleGroup::Stable, rules::flake8_type_checking::rules::TypingOnlyStandardLibraryImport),
         (Flake8TypeChecking, "004") => (RuleGroup::Stable, rules::flake8_type_checking::rules::RuntimeImportInTypeCheckingBlock),
         (Flake8TypeChecking, "005") => (RuleGroup::Stable, rules::flake8_type_checking::rules::EmptyTypeCheckingBlock),
+        (Flake8TypeChecking, "006") => (RuleGroup::Preview, rules::flake8_type_checking::rules::RuntimeStringUnion),
 
         // tryceratops
         (Tryceratops, "002") => (RuleGroup::Stable, rules::tryceratops::rules::RaiseVanillaClass),
@@ -949,6 +953,7 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Refurb, "105") => (RuleGroup::Preview, rules::refurb::rules::PrintEmptyString),
         #[allow(deprecated)]
         (Refurb, "113") => (RuleGroup::Nursery, rules::refurb::rules::RepeatedAppend),
+        (Refurb, "118") => (RuleGroup::Preview, rules::refurb::rules::ReimplementedOperator),
         #[allow(deprecated)]
         (Refurb, "131") => (RuleGroup::Nursery, rules::refurb::rules::DeleteFullSlice),
         #[allow(deprecated)]
@@ -963,6 +968,7 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Refurb, "169") => (RuleGroup::Preview, rules::refurb::rules::TypeNoneComparison),
         (Refurb, "171") => (RuleGroup::Preview, rules::refurb::rules::SingleItemMembershipTest),
         (Refurb, "177") => (RuleGroup::Preview, rules::refurb::rules::ImplicitCwd),
+        (Refurb, "181") => (RuleGroup::Preview, rules::refurb::rules::HashlibDigestHex),
 
         // flake8-logging
         (Flake8Logging, "001") => (RuleGroup::Preview, rules::flake8_logging::rules::DirectLoggerInstantiation),

crates/ruff_linter/src/fix/edits.rs

@@ -3,12 +3,14 @@
 use anyhow::{Context, Result};
 
 use ruff_diagnostics::Edit;
-use ruff_python_ast::AnyNodeRef;
+use ruff_python_ast::parenthesize::parenthesized_range;
 use ruff_python_ast::{self as ast, Arguments, ExceptHandler, Stmt};
+use ruff_python_ast::{AnyNodeRef, ArgOrKeyword};
 use ruff_python_codegen::Stylist;
 use ruff_python_index::Indexer;
 use ruff_python_trivia::{
-    has_leading_content, is_python_whitespace, PythonWhitespace, SimpleTokenKind, SimpleTokenizer,
+    has_leading_content, is_python_whitespace, CommentRanges, PythonWhitespace, SimpleTokenKind,
+    SimpleTokenizer,
 };
 use ruff_source_file::{Locator, NewlineWithTrailingNewline, UniversalNewlines};
 use ruff_text_size::{Ranged, TextLen, TextRange, TextSize};
@@ -138,6 +140,32 @@ pub(crate) fn remove_argument<T: Ranged>(
     }
 }
 
+/// Generic function to add arguments or keyword arguments to function calls.
+pub(crate) fn add_argument(
+    argument: &str,
+    arguments: &Arguments,
+    comment_ranges: &CommentRanges,
+    source: &str,
+) -> Edit {
+    if let Some(last) = arguments.arguments_source_order().last() {
+        // Case 1: existing arguments, so append after the last argument.
+        let last = parenthesized_range(
+            match last {
+                ArgOrKeyword::Arg(arg) => arg.into(),
+                ArgOrKeyword::Keyword(keyword) => (&keyword.value).into(),
+            },
+            arguments.into(),
+            comment_ranges,
+            source,
+        )
+        .unwrap_or(last.range());
+        Edit::insertion(format!(", {argument}"), last.end())
+    } else {
+        // Case 2: no arguments. Add argument, without any trailing comma.
+        Edit::insertion(argument.to_string(), arguments.start() + TextSize::from(1))
+    }
+}
+
 /// Determine if a vector contains only one, specific element.
 fn is_only<T: PartialEq>(vec: &[T], value: &T) -> bool {
     vec.len() == 1 && vec[0] == *value

crates/ruff_linter/src/importer/mod.rs

@@ -13,7 +13,7 @@ use ruff_text_size::{Ranged, TextSize};
 use ruff_diagnostics::Edit;
 use ruff_python_ast::imports::{AnyImport, Import, ImportFrom};
 use ruff_python_codegen::Stylist;
-use ruff_python_semantic::SemanticModel;
+use ruff_python_semantic::{ImportedName, SemanticModel};
 use ruff_python_trivia::textwrap::indent;
 use ruff_source_file::Locator;
 
@@ -132,7 +132,48 @@ impl<'a> Importer<'a> {
         )?;
 
         // Import the `TYPE_CHECKING` symbol from the typing module.
-        let (type_checking_edit, type_checking) = self.get_or_import_type_checking(at, semantic)?;
+        let (type_checking_edit, type_checking) =
+            if let Some(type_checking) = Self::find_type_checking(at, semantic)? {
+                // Special-case: if the `TYPE_CHECKING` symbol is imported as part of the same
+                // statement that we're modifying, avoid adding a no-op edit. For example, here,
+                // the `TYPE_CHECKING` no-op edit would overlap with the edit to remove `Final`
+                // from the import:
+                // ```python
+                // from __future__ import annotations
+                //
+                // from typing import Final, TYPE_CHECKING
+                //
+                // Const: Final[dict] = {}
+                // ```
+                let edit = if type_checking.statement(semantic) == import.statement {
+                    None
+                } else {
+                    Some(Edit::range_replacement(
+                        self.locator.slice(type_checking.range()).to_string(),
+                        type_checking.range(),
+                    ))
+                };
+                (edit, type_checking.into_name())
+            } else {
+                // Special-case: if the `TYPE_CHECKING` symbol would be added to the same import
+                // we're modifying, import it as a separate import statement. For example, here,
+                // we're concurrently removing `Final` and adding `TYPE_CHECKING`, so it's easier to
+                // use a separate import statement:
+                // ```python
+                // from __future__ import annotations
+                //
+                // from typing import Final
+                //
+                // Const: Final[dict] = {}
+                // ```
+                let (edit, name) = self.import_symbol(
+                    &ImportRequest::import_from("typing", "TYPE_CHECKING"),
+                    at,
+                    Some(import.statement),
+                    semantic,
+                )?;
+                (Some(edit), name)
+            };
 
         // Add the import to a `TYPE_CHECKING` block.
         let add_import_edit = if let Some(block) = self.preceding_type_checking_block(at) {
@@ -157,28 +198,21 @@ impl<'a> Importer<'a> {
         })
     }
 
-    /// Generate an [`Edit`] to reference `typing.TYPE_CHECKING`. Returns the [`Edit`] necessary to
-    /// make the symbol available in the current scope along with the bound name of the symbol.
-    fn get_or_import_type_checking(
-        &self,
+    /// Find a reference to `typing.TYPE_CHECKING`.
+    fn find_type_checking(
         at: TextSize,
         semantic: &SemanticModel,
-    ) -> Result<(Edit, String), ResolutionError> {
+    ) -> Result<Option<ImportedName>, ResolutionError> {
         for module in semantic.typing_modules() {
-            if let Some((edit, name)) = self.get_symbol(
+            if let Some(imported_name) = Self::find_symbol(
                 &ImportRequest::import_from(module, "TYPE_CHECKING"),
                 at,
                 semantic,
             )? {
-                return Ok((edit, name));
+                return Ok(Some(imported_name));
             }
         }
-
-        self.import_symbol(
-            &ImportRequest::import_from("typing", "TYPE_CHECKING"),
-            at,
-            semantic,
-        )
+        Ok(None)
     }
 
     /// Generate an [`Edit`] to reference the given symbol. Returns the [`Edit`] necessary to make
@@ -192,16 +226,15 @@ impl<'a> Importer<'a> {
         semantic: &SemanticModel,
     ) -> Result<(Edit, String), ResolutionError> {
         self.get_symbol(symbol, at, semantic)?
-            .map_or_else(|| self.import_symbol(symbol, at, semantic), Ok)
+            .map_or_else(|| self.import_symbol(symbol, at, None, semantic), Ok)
     }
 
-    /// Return an [`Edit`] to reference an existing symbol, if it's present in the given [`SemanticModel`].
-    fn get_symbol(
-        &self,
+    /// Return the [`ImportedName`] to for existing symbol, if it's present in the given [`SemanticModel`].
+    fn find_symbol(
         symbol: &ImportRequest,
         at: TextSize,
         semantic: &SemanticModel,
-    ) -> Result<Option<(Edit, String)>, ResolutionError> {
+    ) -> Result<Option<ImportedName>, ResolutionError> {
         // If the symbol is already available in the current scope, use it.
         let Some(imported_name) =
             semantic.resolve_qualified_import_name(symbol.module, symbol.member)
@@ -226,6 +259,21 @@ impl<'a> Importer<'a> {
             return Err(ResolutionError::IncompatibleContext);
         }
 
+        Ok(Some(imported_name))
+    }
+
+    /// Return an [`Edit`] to reference an existing symbol, if it's present in the given [`SemanticModel`].
+    fn get_symbol(
+        &self,
+        symbol: &ImportRequest,
+        at: TextSize,
+        semantic: &SemanticModel,
+    ) -> Result<Option<(Edit, String)>, ResolutionError> {
+        // Find the symbol in the current scope.
+        let Some(imported_name) = Self::find_symbol(symbol, at, semantic)? else {
+            return Ok(None);
+        };
+
         // We also add a no-op edit to force conflicts with any other fixes that might try to
         // remove the import. Consider:
         //
@@ -259,9 +307,13 @@ impl<'a> Importer<'a> {
         &self,
         symbol: &ImportRequest,
         at: TextSize,
+        except: Option<&Stmt>,
         semantic: &SemanticModel,
     ) -> Result<(Edit, String), ResolutionError> {
-        if let Some(stmt) = self.find_import_from(symbol.module, at) {
+        if let Some(stmt) = self
+            .find_import_from(symbol.module, at)
+            .filter(|stmt| except != Some(stmt))
+        {
             // Case 1: `from functools import lru_cache` is in scope, and we're trying to reference
             // `functools.cache`; thus, we add `cache` to the import, and return `"cache"` as the
             // bound name.
@@ -423,14 +475,18 @@ impl RuntimeImportEdit {
 #[derive(Debug)]
 pub(crate) struct TypingImportEdit {
     /// The edit to add the `TYPE_CHECKING` symbol to the module.
-    type_checking_edit: Edit,
+    type_checking_edit: Option<Edit>,
     /// The edit to add the import to a `TYPE_CHECKING` block.
     add_import_edit: Edit,
 }
 
 impl TypingImportEdit {
-    pub(crate) fn into_edits(self) -> Vec<Edit> {
-        vec![self.type_checking_edit, self.add_import_edit]
+    pub(crate) fn into_edits(self) -> (Edit, Option<Edit>) {
+        if let Some(type_checking_edit) = self.type_checking_edit {
+            (type_checking_edit, Some(self.add_import_edit))
+        } else {
+            (self.add_import_edit, None)
+        }
     }
 }
 

crates/ruff_linter/src/message/mod.rs

@@ -17,6 +17,7 @@ use ruff_diagnostics::{Diagnostic, DiagnosticKind, Fix};
 use ruff_notebook::NotebookIndex;
 use ruff_source_file::{SourceFile, SourceLocation};
 use ruff_text_size::{Ranged, TextRange, TextSize};
+pub use sarif::SarifEmitter;
 pub use text::TextEmitter;
 
 mod azure;
@@ -28,6 +29,7 @@ mod json;
 mod json_lines;
 mod junit;
 mod pylint;
+mod sarif;
 mod text;
 
 #[derive(Debug, PartialEq, Eq)]

crates/ruff_linter/src/message/sarif.rs

@@ -0,0 +1,212 @@
+use std::io::Write;
+
+use anyhow::Result;
+use serde::{Serialize, Serializer};
+use serde_json::json;
+
+use ruff_source_file::OneIndexed;
+
+use crate::codes::Rule;
+use crate::fs::normalize_path;
+use crate::message::{Emitter, EmitterContext, Message};
+use crate::registry::{AsRule, Linter, RuleNamespace};
+use crate::VERSION;
+
+use strum::IntoEnumIterator;
+
+pub struct SarifEmitter;
+
+impl Emitter for SarifEmitter {
+    fn emit(
+        &mut self,
+        writer: &mut dyn Write,
+        messages: &[Message],
+        _context: &EmitterContext,
+    ) -> Result<()> {
+        let results = messages
+            .iter()
+            .map(SarifResult::from_message)
+            .collect::<Result<Vec<_>>>()?;
+
+        let output = json!({
+            "$schema": "https://json.schemastore.org/sarif-2.1.0.json",
+            "version": "2.1.0",
+            "runs": [{
+                "tool": {
+                    "driver": {
+                        "name": "ruff",
+                        "informationUri": "https://github.com/astral-sh/ruff",
+                        "rules": Rule::iter().map(SarifRule::from).collect::<Vec<_>>(),
+                        "version": VERSION.to_string(),
+                    }
+                },
+                "results": results,
+            }],
+        });
+        serde_json::to_writer_pretty(writer, &output)?;
+        Ok(())
+    }
+}
+
+#[derive(Debug, Clone)]
+struct SarifRule<'a> {
+    name: &'a str,
+    code: String,
+    linter: &'a str,
+    summary: &'a str,
+    explanation: Option<&'a str>,
+    url: Option<String>,
+}
+
+impl From<Rule> for SarifRule<'_> {
+    fn from(rule: Rule) -> Self {
+        let code = rule.noqa_code().to_string();
+        let (linter, _) = Linter::parse_code(&code).unwrap();
+        Self {
+            name: rule.into(),
+            code,
+            linter: linter.name(),
+            summary: rule.message_formats()[0],
+            explanation: rule.explanation(),
+            url: rule.url(),
+        }
+    }
+}
+
+impl Serialize for SarifRule<'_> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        json!({
+            "id": self.code,
+            "shortDescription": {
+                "text": self.summary,
+            },
+            "fullDescription": {
+                "text": self.explanation,
+            },
+            "help": {
+                "text": self.summary,
+            },
+            "helpUri": self.url,
+            "properties": {
+                "id": self.code,
+                "kind": self.linter,
+                "name": self.name,
+                "problem.severity": "error".to_string(),
+            },
+        })
+        .serialize(serializer)
+    }
+}
+
+#[derive(Debug)]
+struct SarifResult {
+    rule: Rule,
+    level: String,
+    message: String,
+    uri: String,
+    start_line: OneIndexed,
+    start_column: OneIndexed,
+    end_line: OneIndexed,
+    end_column: OneIndexed,
+}
+
+impl SarifResult {
+    #[cfg(not(target_arch = "wasm32"))]
+    fn from_message(message: &Message) -> Result<Self> {
+        let start_location = message.compute_start_location();
+        let end_location = message.compute_end_location();
+        let path = normalize_path(message.filename());
+        Ok(Self {
+            rule: message.kind.rule(),
+            level: "error".to_string(),
+            message: message.kind.name.clone(),
+            uri: url::Url::from_file_path(&path)
+                .map_err(|()| anyhow::anyhow!("Failed to convert path to URL: {}", path.display()))?
+                .to_string(),
+            start_line: start_location.row,
+            start_column: start_location.column,
+            end_line: end_location.row,
+            end_column: end_location.column,
+        })
+    }
+
+    #[cfg(target_arch = "wasm32")]
+    #[allow(clippy::unnecessary_wraps)]
+    fn from_message(message: &Message) -> Result<Self> {
+        let start_location = message.compute_start_location();
+        let end_location = message.compute_end_location();
+        let path = normalize_path(message.filename());
+        Ok(Self {
+            rule: message.kind.rule(),
+            level: "error".to_string(),
+            message: message.kind.name.clone(),
+            uri: path.display().to_string(),
+            start_line: start_location.row,
+            start_column: start_location.column,
+            end_line: end_location.row,
+            end_column: end_location.column,
+        })
+    }
+}
+
+impl Serialize for SarifResult {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        json!({
+            "level": self.level,
+            "message": {
+                "text": self.message,
+            },
+            "locations": [{
+                "physicalLocation": {
+                    "artifactLocation": {
+                        "uri": self.uri,
+                    },
+                    "region": {
+                        "startLine": self.start_line,
+                        "startColumn": self.start_column,
+                        "endLine": self.end_line,
+                        "endColumn": self.end_column,
+                    }
+                }
+            }],
+            "ruleId": self.rule.noqa_code().to_string(),
+        })
+        .serialize(serializer)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use crate::message::tests::{capture_emitter_output, create_messages};
+    use crate::message::SarifEmitter;
+
+    fn get_output() -> String {
+        let mut emitter = SarifEmitter {};
+        capture_emitter_output(&mut emitter, &create_messages())
+    }
+
+    #[test]
+    fn valid_json() {
+        let content = get_output();
+        serde_json::from_str::<serde_json::Value>(&content).unwrap();
+    }
+
+    #[test]
+    fn test_results() {
+        let content = get_output();
+        let sarif = serde_json::from_str::<serde_json::Value>(content.as_str()).unwrap();
+        let rules = sarif["runs"][0]["tool"]["driver"]["rules"]
+            .as_array()
+            .unwrap();
+        let results = sarif["runs"][0]["results"].as_array().unwrap();
+        assert_eq!(results.len(), 3);
+        assert!(rules.len() > 3);
+    }
+}

crates/ruff_linter/src/rules/flake8_annotations/helpers.rs

@@ -1,10 +1,9 @@
 use itertools::Itertools;
-use ruff_diagnostics::Edit;
 use rustc_hash::FxHashSet;
 
-use crate::importer::{ImportRequest, Importer};
+use ruff_diagnostics::Edit;
 use ruff_python_ast::helpers::{
-    pep_604_union, typing_optional, typing_union, ReturnStatementVisitor,
+    pep_604_union, typing_optional, typing_union, ReturnStatementVisitor, Terminal,
 };
 use ruff_python_ast::visitor::Visitor;
 use ruff_python_ast::{self as ast, Expr, ExprContext};
@@ -13,6 +12,7 @@ use ruff_python_semantic::analyze::visibility;
 use ruff_python_semantic::{Definition, SemanticModel};
 use ruff_text_size::{TextRange, TextSize};
 
+use crate::importer::{ImportRequest, Importer};
 use crate::settings::types::PythonVersion;
 
 /// Return the name of the function, if it's overloaded.
@@ -48,14 +48,27 @@ pub(crate) fn auto_return_type(function: &ast::StmtFunctionDef) -> Option<AutoPy
     let returns = {
         let mut visitor = ReturnStatementVisitor::default();
         visitor.visit_body(&function.body);
+
+        // Ignore generators.
         if visitor.is_generator {
             return None;
         }
+
         visitor.returns
     };
 
+    // Determine the terminal behavior (i.e., implicit return, no return, etc.).
+    let terminal = Terminal::from_function(function);
+
+    // If every control flow path raises an exception, return `NoReturn`.
+    if terminal == Some(Terminal::Raise) {
+        return Some(AutoPythonType::Never);
+    }
+
     // Determine the return type of the first `return` statement.
-    let (return_statement, returns) = returns.split_first()?;
+    let Some((return_statement, returns)) = returns.split_first() else {
+        return Some(AutoPythonType::Atom(PythonType::None));
+    };
     let mut return_type = return_statement.value.as_deref().map_or(
         ResolvedPythonType::Atom(PythonType::None),
         ResolvedPythonType::from,
@@ -69,6 +82,16 @@ pub(crate) fn auto_return_type(function: &ast::StmtFunctionDef) -> Option<AutoPy
         ));
     }
 
+    // If the function has an implicit return, union with `None`, as in:
+    // ```python
+    // def func(x: int):
+    //     if x > 0:
+    //         return 1
+    // ```
+    if terminal.is_none() {
+        return_type = return_type.union(ResolvedPythonType::Atom(PythonType::None));
+    }
+
     match return_type {
         ResolvedPythonType::Atom(python_type) => Some(AutoPythonType::Atom(python_type)),
         ResolvedPythonType::Union(python_types) => Some(AutoPythonType::Union(python_types)),
@@ -79,6 +102,7 @@ pub(crate) fn auto_return_type(function: &ast::StmtFunctionDef) -> Option<AutoPy
 
 #[derive(Debug)]
 pub(crate) enum AutoPythonType {
+    Never,
     Atom(PythonType),
     Union(FxHashSet<PythonType>),
 }
@@ -96,6 +120,28 @@ impl AutoPythonType {
         target_version: PythonVersion,
     ) -> Option<(Expr, Vec<Edit>)> {
         match self {
+            AutoPythonType::Never => {
+                let (no_return_edit, binding) = importer
+                    .get_or_import_symbol(
+                        &ImportRequest::import_from(
+                            "typing",
+                            if target_version >= PythonVersion::Py311 {
+                                "Never"
+                            } else {
+                                "NoReturn"
+                            },
+                        ),
+                        at,
+                        semantic,
+                    )
+                    .ok()?;
+                let expr = Expr::Name(ast::ExprName {
+                    id: binding,
+                    range: TextRange::default(),
+                    ctx: ExprContext::Load,
+                });
+                Some((expr, vec![no_return_edit]))
+            }
             AutoPythonType::Atom(python_type) => {
                 let expr = type_expr(python_type)?;
                 Some((expr, vec![]))

crates/ruff_linter/src/rules/flake8_annotations/rules/definition.rs

@@ -537,6 +537,19 @@ fn check_dynamically_typed<F>(
     }
 }
 
+fn is_empty_body(body: &[Stmt]) -> bool {
+    body.iter().all(|stmt| match stmt {
+        Stmt::Pass(_) => true,
+        Stmt::Expr(ast::StmtExpr { value, range: _ }) => {
+            matches!(
+                value.as_ref(),
+                Expr::StringLiteral(_) | Expr::EllipsisLiteral(_)
+            )
+        }
+        _ => false,
+    })
+}
+
 /// Generate flake8-annotation checks for a given `Definition`.
 pub(crate) fn definition(
     checker: &Checker,
@@ -725,16 +738,22 @@ pub(crate) fn definition(
     ) {
         if is_method && visibility::is_classmethod(decorator_list, checker.semantic()) {
             if checker.enabled(Rule::MissingReturnTypeClassMethod) {
-                let return_type = auto_return_type(function)
-                    .and_then(|return_type| {
-                        return_type.into_expression(
-                            checker.importer(),
-                            function.parameters.start(),
-                            checker.semantic(),
-                            checker.settings.target_version,
-                        )
-                    })
-                    .map(|(return_type, edits)| (checker.generator().expr(&return_type), edits));
+                let return_type = if visibility::is_abstract(decorator_list, checker.semantic())
+                    && is_empty_body(body)
+                {
+                    None
+                } else {
+                    auto_return_type(function)
+                        .and_then(|return_type| {
+                            return_type.into_expression(
+                                checker.importer(),
+                                function.parameters.start(),
+                                checker.semantic(),
+                                checker.settings.target_version,
+                            )
+                        })
+                        .map(|(return_type, edits)| (checker.generator().expr(&return_type), edits))
+                };
                 let mut diagnostic = Diagnostic::new(
                     MissingReturnTypeClassMethod {
                         name: name.to_string(),
@@ -752,16 +771,22 @@ pub(crate) fn definition(
             }
         } else if is_method && visibility::is_staticmethod(decorator_list, checker.semantic()) {
             if checker.enabled(Rule::MissingReturnTypeStaticMethod) {
-                let return_type = auto_return_type(function)
-                    .and_then(|return_type| {
-                        return_type.into_expression(
-                            checker.importer(),
-                            function.parameters.start(),
-                            checker.semantic(),
-                            checker.settings.target_version,
-                        )
-                    })
-                    .map(|(return_type, edits)| (checker.generator().expr(&return_type), edits));
+                let return_type = if visibility::is_abstract(decorator_list, checker.semantic())
+                    && is_empty_body(body)
+                {
+                    None
+                } else {
+                    auto_return_type(function)
+                        .and_then(|return_type| {
+                            return_type.into_expression(
+                                checker.importer(),
+                                function.parameters.start(),
+                                checker.semantic(),
+                                checker.settings.target_version,
+                            )
+                        })
+                        .map(|(return_type, edits)| (checker.generator().expr(&return_type), edits))
+                };
                 let mut diagnostic = Diagnostic::new(
                     MissingReturnTypeStaticMethod {
                         name: name.to_string(),
@@ -818,18 +843,25 @@ pub(crate) fn definition(
             match visibility {
                 visibility::Visibility::Public => {
                     if checker.enabled(Rule::MissingReturnTypeUndocumentedPublicFunction) {
-                        let return_type = auto_return_type(function)
-                            .and_then(|return_type| {
-                                return_type.into_expression(
-                                    checker.importer(),
-                                    function.parameters.start(),
-                                    checker.semantic(),
-                                    checker.settings.target_version,
-                                )
-                            })
-                            .map(|(return_type, edits)| {
-                                (checker.generator().expr(&return_type), edits)
-                            });
+                        let return_type =
+                            if visibility::is_abstract(decorator_list, checker.semantic())
+                                && is_empty_body(body)
+                            {
+                                None
+                            } else {
+                                auto_return_type(function)
+                                    .and_then(|return_type| {
+                                        return_type.into_expression(
+                                            checker.importer(),
+                                            function.parameters.start(),
+                                            checker.semantic(),
+                                            checker.settings.target_version,
+                                        )
+                                    })
+                                    .map(|(return_type, edits)| {
+                                        (checker.generator().expr(&return_type), edits)
+                                    })
+                            };
                         let mut diagnostic = Diagnostic::new(
                             MissingReturnTypeUndocumentedPublicFunction {
                                 name: name.to_string(),
@@ -853,18 +885,25 @@ pub(crate) fn definition(
                 }
                 visibility::Visibility::Private => {
                     if checker.enabled(Rule::MissingReturnTypePrivateFunction) {
-                        let return_type = auto_return_type(function)
-                            .and_then(|return_type| {
-                                return_type.into_expression(
-                                    checker.importer(),
-                                    function.parameters.start(),
-                                    checker.semantic(),
-                                    checker.settings.target_version,
-                                )
-                            })
-                            .map(|(return_type, edits)| {
-                                (checker.generator().expr(&return_type), edits)
-                            });
+                        let return_type =
+                            if visibility::is_abstract(decorator_list, checker.semantic())
+                                && is_empty_body(body)
+                            {
+                                None
+                            } else {
+                                auto_return_type(function)
+                                    .and_then(|return_type| {
+                                        return_type.into_expression(
+                                            checker.importer(),
+                                            function.parameters.start(),
+                                            checker.semantic(),
+                                            checker.settings.target_version,
+                                        )
+                                    })
+                                    .map(|(return_type, edits)| {
+                                        (checker.generator().expr(&return_type), edits)
+                                    })
+                            };
                         let mut diagnostic = Diagnostic::new(
                             MissingReturnTypePrivateFunction {
                                 name: name.to_string(),

crates/ruff_linter/src/rules/flake8_annotations/snapshots/ruff_linter__rules__flake8_annotations__tests__auto_return_type.snap

@@ -200,4 +200,383 @@ auto_return_type.py:59:5: ANN201 [*] Missing return type annotation for public f
 61 61 |         return 1
 62 62 |     elif x > 5:
 
+auto_return_type.py:68:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+68 | def func(x: int):
+   |     ^^^^ ANN201
+69 |     if x:
+70 |         return 1
+   |
+   = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+65 65 |         return None
+66 66 | 
+67 67 | 
+68    |-def func(x: int):
+   68 |+def func(x: int) -> int | None:
+69 69 |     if x:
+70 70 |         return 1
+71 71 | 
+
+auto_return_type.py:73:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+73 | def func():
+   |     ^^^^ ANN201
+74 |     x = 1
+   |
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+70 70 |         return 1
+71 71 | 
+72 72 | 
+73    |-def func():
+   73 |+def func() -> None:
+74 74 |     x = 1
+75 75 | 
+76 76 | 
+
+auto_return_type.py:77:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+77 | def func(x: int):
+   |     ^^^^ ANN201
+78 |     if x > 0:
+79 |         return 1
+   |
+   = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+74 74 |     x = 1
+75 75 | 
+76 76 | 
+77    |-def func(x: int):
+   77 |+def func(x: int) -> int | None:
+78 78 |     if x > 0:
+79 79 |         return 1
+80 80 | 
+
+auto_return_type.py:82:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+82 | def func(x: int):
+   |     ^^^^ ANN201
+83 |     match x:
+84 |         case [1, 2, 3]:
+   |
+   = help: Add return type annotation: `str | int`
+
+ℹ Unsafe fix
+79 79 |         return 1
+80 80 | 
+81 81 | 
+82    |-def func(x: int):
+   82 |+def func(x: int) -> str | int:
+83 83 |     match x:
+84 84 |         case [1, 2, 3]:
+85 85 |             return 1
+
+auto_return_type.py:90:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+90 | def func(x: int):
+   |     ^^^^ ANN201
+91 |     for i in range(5):
+92 |         if i > 0:
+   |
+   = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+87 87 |             return "foo"
+88 88 | 
+89 89 | 
+90    |-def func(x: int):
+   90 |+def func(x: int) -> int | None:
+91 91 |     for i in range(5):
+92 92 |         if i > 0:
+93 93 |             return 1
+
+auto_return_type.py:96:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+96 | def func(x: int):
+   |     ^^^^ ANN201
+97 |     for i in range(5):
+98 |         if i > 0:
+   |
+   = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+93 93 |             return 1
+94 94 | 
+95 95 | 
+96    |-def func(x: int):
+   96 |+def func(x: int) -> int:
+97 97 |     for i in range(5):
+98 98 |         if i > 0:
+99 99 |             return 1
+
+auto_return_type.py:104:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+104 | def func(x: int):
+    |     ^^^^ ANN201
+105 |     for i in range(5):
+106 |         if i > 0:
+    |
+    = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+101 101 |         return 4
+102 102 | 
+103 103 | 
+104     |-def func(x: int):
+    104 |+def func(x: int) -> int | None:
+105 105 |     for i in range(5):
+106 106 |         if i > 0:
+107 107 |             break
+
+auto_return_type.py:112:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+112 | def func(x: int):
+    |     ^^^^ ANN201
+113 |     try:
+114 |         pass
+    |
+    = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+109 109 |         return 4
+110 110 | 
+111 111 | 
+112     |-def func(x: int):
+    112 |+def func(x: int) -> int | None:
+113 113 |     try:
+114 114 |         pass
+115 115 |     except:
+
+auto_return_type.py:119:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+119 | def func(x: int):
+    |     ^^^^ ANN201
+120 |     try:
+121 |         pass
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+116 116 |         return 1
+117 117 | 
+118 118 | 
+119     |-def func(x: int):
+    119 |+def func(x: int) -> int:
+120 120 |     try:
+121 121 |         pass
+122 122 |     except:
+
+auto_return_type.py:128:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+128 | def func(x: int):
+    |     ^^^^ ANN201
+129 |     try:
+130 |         pass
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+125 125 |         return 2
+126 126 | 
+127 127 | 
+128     |-def func(x: int):
+    128 |+def func(x: int) -> int:
+129 129 |     try:
+130 130 |         pass
+131 131 |     except:
+
+auto_return_type.py:137:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+137 | def func(x: int):
+    |     ^^^^ ANN201
+138 |     try:
+139 |         return 1
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+134 134 |         return 2
+135 135 | 
+136 136 | 
+137     |-def func(x: int):
+    137 |+def func(x: int) -> int:
+138 138 |     try:
+139 139 |         return 1
+140 140 |     except:
+
+auto_return_type.py:146:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+146 | def func(x: int):
+    |     ^^^^ ANN201
+147 |     while x > 0:
+148 |         break
+    |
+    = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+143 143 |         pass
+144 144 | 
+145 145 | 
+146     |-def func(x: int):
+    146 |+def func(x: int) -> int | None:
+147 147 |     while x > 0:
+148 148 |         break
+149 149 |         return 1
+
+auto_return_type.py:158:9: ANN201 Missing return type annotation for public function `method`
+    |
+156 | class Foo(abc.ABC):
+157 |     @abstractmethod
+158 |     def method(self):
+    |         ^^^^^^ ANN201
+159 |         pass
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:162:9: ANN201 Missing return type annotation for public function `method`
+    |
+161 |     @abc.abstractmethod
+162 |     def method(self):
+    |         ^^^^^^ ANN201
+163 |         """Docstring."""
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:166:9: ANN201 Missing return type annotation for public function `method`
+    |
+165 |     @abc.abstractmethod
+166 |     def method(self):
+    |         ^^^^^^ ANN201
+167 |         ...
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:171:9: ANN205 Missing return type annotation for staticmethod `method`
+    |
+169 |     @staticmethod
+170 |     @abstractmethod
+171 |     def method():
+    |         ^^^^^^ ANN205
+172 |         pass
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:176:9: ANN206 Missing return type annotation for classmethod `method`
+    |
+174 |     @classmethod
+175 |     @abstractmethod
+176 |     def method(cls):
+    |         ^^^^^^ ANN206
+177 |         pass
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:180:9: ANN201 [*] Missing return type annotation for public function `method`
+    |
+179 |     @abstractmethod
+180 |     def method(self):
+    |         ^^^^^^ ANN201
+181 |         if self.x > 0:
+182 |             return 1
+    |
+    = help: Add return type annotation: `float`
+
+ℹ Unsafe fix
+177 177 |         pass
+178 178 | 
+179 179 |     @abstractmethod
+180     |-    def method(self):
+    180 |+    def method(self) -> float:
+181 181 |         if self.x > 0:
+182 182 |             return 1
+183 183 |         else:
+
+auto_return_type.py:187:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+187 | def func(x: int):
+    |     ^^^^ ANN201
+188 |     try:
+189 |         pass
+    |
+    = help: Add return type annotation: `int | None`
+
+ℹ Unsafe fix
+184 184 |             return 1.5
+185 185 | 
+186 186 | 
+187     |-def func(x: int):
+    187 |+def func(x: int) -> int | None:
+188 188 |     try:
+189 189 |         pass
+190 190 |     except:
+
+auto_return_type.py:194:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+194 | def func(x: int):
+    |     ^^^^ ANN201
+195 |     try:
+196 |         pass
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+191 191 |         return 2
+192 192 | 
+193 193 | 
+194     |-def func(x: int):
+    194 |+def func(x: int) -> int:
+195 195 |     try:
+196 196 |         pass
+197 197 |     except:
+
+auto_return_type.py:203:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+203 | def func(x: int):
+    |     ^^^^ ANN201
+204 |     if not x:
+205 |         raise ValueError
+    |
+    = help: Add return type annotation: `Never`
+
+ℹ Unsafe fix
+151 151 | 
+152 152 | import abc
+153 153 | from abc import abstractmethod
+    154 |+from typing import Never
+154 155 | 
+155 156 | 
+156 157 | class Foo(abc.ABC):
+--------------------------------------------------------------------------------
+200 201 |         return 3
+201 202 | 
+202 203 | 
+203     |-def func(x: int):
+    204 |+def func(x: int) -> Never:
+204 205 |     if not x:
+205 206 |         raise ValueError
+206 207 |     else:
+
+auto_return_type.py:210:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+210 | def func(x: int):
+    |     ^^^^ ANN201
+211 |     if not x:
+212 |         raise ValueError
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+207 207 |         raise TypeError
+208 208 | 
+209 209 | 
+210     |-def func(x: int):
+    210 |+def func(x: int) -> int:
+211 211 |     if not x:
+212 212 |         raise ValueError
+213 213 |     else:
+
 

crates/ruff_linter/src/rules/flake8_annotations/snapshots/ruff_linter__rules__flake8_annotations__tests__auto_return_type_py38.snap

@@ -220,4 +220,426 @@ auto_return_type.py:59:5: ANN201 [*] Missing return type annotation for public f
 61 62 |         return 1
 62 63 |     elif x > 5:
 
+auto_return_type.py:68:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+68 | def func(x: int):
+   |     ^^^^ ANN201
+69 |     if x:
+70 |         return 1
+   |
+   = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+   1  |+from typing import Optional
+1  2  | def func():
+2  3  |     return 1
+3  4  | 
+--------------------------------------------------------------------------------
+65 66 |         return None
+66 67 | 
+67 68 | 
+68    |-def func(x: int):
+   69 |+def func(x: int) -> Optional[int]:
+69 70 |     if x:
+70 71 |         return 1
+71 72 | 
+
+auto_return_type.py:73:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+73 | def func():
+   |     ^^^^ ANN201
+74 |     x = 1
+   |
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+70 70 |         return 1
+71 71 | 
+72 72 | 
+73    |-def func():
+   73 |+def func() -> None:
+74 74 |     x = 1
+75 75 | 
+76 76 | 
+
+auto_return_type.py:77:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+77 | def func(x: int):
+   |     ^^^^ ANN201
+78 |     if x > 0:
+79 |         return 1
+   |
+   = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+   1  |+from typing import Optional
+1  2  | def func():
+2  3  |     return 1
+3  4  | 
+--------------------------------------------------------------------------------
+74 75 |     x = 1
+75 76 | 
+76 77 | 
+77    |-def func(x: int):
+   78 |+def func(x: int) -> Optional[int]:
+78 79 |     if x > 0:
+79 80 |         return 1
+80 81 | 
+
+auto_return_type.py:82:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+82 | def func(x: int):
+   |     ^^^^ ANN201
+83 |     match x:
+84 |         case [1, 2, 3]:
+   |
+   = help: Add return type annotation: `Union[str | int]`
+
+ℹ Unsafe fix
+   1  |+from typing import Union
+1  2  | def func():
+2  3  |     return 1
+3  4  | 
+--------------------------------------------------------------------------------
+79 80 |         return 1
+80 81 | 
+81 82 | 
+82    |-def func(x: int):
+   83 |+def func(x: int) -> Union[str | int]:
+83 84 |     match x:
+84 85 |         case [1, 2, 3]:
+85 86 |             return 1
+
+auto_return_type.py:90:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+90 | def func(x: int):
+   |     ^^^^ ANN201
+91 |     for i in range(5):
+92 |         if i > 0:
+   |
+   = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+   1  |+from typing import Optional
+1  2  | def func():
+2  3  |     return 1
+3  4  | 
+--------------------------------------------------------------------------------
+87 88 |             return "foo"
+88 89 | 
+89 90 | 
+90    |-def func(x: int):
+   91 |+def func(x: int) -> Optional[int]:
+91 92 |     for i in range(5):
+92 93 |         if i > 0:
+93 94 |             return 1
+
+auto_return_type.py:96:5: ANN201 [*] Missing return type annotation for public function `func`
+   |
+96 | def func(x: int):
+   |     ^^^^ ANN201
+97 |     for i in range(5):
+98 |         if i > 0:
+   |
+   = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+93 93 |             return 1
+94 94 | 
+95 95 | 
+96    |-def func(x: int):
+   96 |+def func(x: int) -> int:
+97 97 |     for i in range(5):
+98 98 |         if i > 0:
+99 99 |             return 1
+
+auto_return_type.py:104:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+104 | def func(x: int):
+    |     ^^^^ ANN201
+105 |     for i in range(5):
+106 |         if i > 0:
+    |
+    = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+    1   |+from typing import Optional
+1   2   | def func():
+2   3   |     return 1
+3   4   | 
+--------------------------------------------------------------------------------
+101 102 |         return 4
+102 103 | 
+103 104 | 
+104     |-def func(x: int):
+    105 |+def func(x: int) -> Optional[int]:
+105 106 |     for i in range(5):
+106 107 |         if i > 0:
+107 108 |             break
+
+auto_return_type.py:112:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+112 | def func(x: int):
+    |     ^^^^ ANN201
+113 |     try:
+114 |         pass
+    |
+    = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+    1   |+from typing import Optional
+1   2   | def func():
+2   3   |     return 1
+3   4   | 
+--------------------------------------------------------------------------------
+109 110 |         return 4
+110 111 | 
+111 112 | 
+112     |-def func(x: int):
+    113 |+def func(x: int) -> Optional[int]:
+113 114 |     try:
+114 115 |         pass
+115 116 |     except:
+
+auto_return_type.py:119:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+119 | def func(x: int):
+    |     ^^^^ ANN201
+120 |     try:
+121 |         pass
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+116 116 |         return 1
+117 117 | 
+118 118 | 
+119     |-def func(x: int):
+    119 |+def func(x: int) -> int:
+120 120 |     try:
+121 121 |         pass
+122 122 |     except:
+
+auto_return_type.py:128:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+128 | def func(x: int):
+    |     ^^^^ ANN201
+129 |     try:
+130 |         pass
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+125 125 |         return 2
+126 126 | 
+127 127 | 
+128     |-def func(x: int):
+    128 |+def func(x: int) -> int:
+129 129 |     try:
+130 130 |         pass
+131 131 |     except:
+
+auto_return_type.py:137:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+137 | def func(x: int):
+    |     ^^^^ ANN201
+138 |     try:
+139 |         return 1
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+134 134 |         return 2
+135 135 | 
+136 136 | 
+137     |-def func(x: int):
+    137 |+def func(x: int) -> int:
+138 138 |     try:
+139 139 |         return 1
+140 140 |     except:
+
+auto_return_type.py:146:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+146 | def func(x: int):
+    |     ^^^^ ANN201
+147 |     while x > 0:
+148 |         break
+    |
+    = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+    1   |+from typing import Optional
+1   2   | def func():
+2   3   |     return 1
+3   4   | 
+--------------------------------------------------------------------------------
+143 144 |         pass
+144 145 | 
+145 146 | 
+146     |-def func(x: int):
+    147 |+def func(x: int) -> Optional[int]:
+147 148 |     while x > 0:
+148 149 |         break
+149 150 |         return 1
+
+auto_return_type.py:158:9: ANN201 Missing return type annotation for public function `method`
+    |
+156 | class Foo(abc.ABC):
+157 |     @abstractmethod
+158 |     def method(self):
+    |         ^^^^^^ ANN201
+159 |         pass
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:162:9: ANN201 Missing return type annotation for public function `method`
+    |
+161 |     @abc.abstractmethod
+162 |     def method(self):
+    |         ^^^^^^ ANN201
+163 |         """Docstring."""
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:166:9: ANN201 Missing return type annotation for public function `method`
+    |
+165 |     @abc.abstractmethod
+166 |     def method(self):
+    |         ^^^^^^ ANN201
+167 |         ...
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:171:9: ANN205 Missing return type annotation for staticmethod `method`
+    |
+169 |     @staticmethod
+170 |     @abstractmethod
+171 |     def method():
+    |         ^^^^^^ ANN205
+172 |         pass
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:176:9: ANN206 Missing return type annotation for classmethod `method`
+    |
+174 |     @classmethod
+175 |     @abstractmethod
+176 |     def method(cls):
+    |         ^^^^^^ ANN206
+177 |         pass
+    |
+    = help: Add return type annotation
+
+auto_return_type.py:180:9: ANN201 [*] Missing return type annotation for public function `method`
+    |
+179 |     @abstractmethod
+180 |     def method(self):
+    |         ^^^^^^ ANN201
+181 |         if self.x > 0:
+182 |             return 1
+    |
+    = help: Add return type annotation: `float`
+
+ℹ Unsafe fix
+177 177 |         pass
+178 178 | 
+179 179 |     @abstractmethod
+180     |-    def method(self):
+    180 |+    def method(self) -> float:
+181 181 |         if self.x > 0:
+182 182 |             return 1
+183 183 |         else:
+
+auto_return_type.py:187:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+187 | def func(x: int):
+    |     ^^^^ ANN201
+188 |     try:
+189 |         pass
+    |
+    = help: Add return type annotation: `Optional[int]`
+
+ℹ Unsafe fix
+151 151 | 
+152 152 | import abc
+153 153 | from abc import abstractmethod
+    154 |+from typing import Optional
+154 155 | 
+155 156 | 
+156 157 | class Foo(abc.ABC):
+--------------------------------------------------------------------------------
+184 185 |             return 1.5
+185 186 | 
+186 187 | 
+187     |-def func(x: int):
+    188 |+def func(x: int) -> Optional[int]:
+188 189 |     try:
+189 190 |         pass
+190 191 |     except:
+
+auto_return_type.py:194:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+194 | def func(x: int):
+    |     ^^^^ ANN201
+195 |     try:
+196 |         pass
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+191 191 |         return 2
+192 192 | 
+193 193 | 
+194     |-def func(x: int):
+    194 |+def func(x: int) -> int:
+195 195 |     try:
+196 196 |         pass
+197 197 |     except:
+
+auto_return_type.py:203:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+203 | def func(x: int):
+    |     ^^^^ ANN201
+204 |     if not x:
+205 |         raise ValueError
+    |
+    = help: Add return type annotation: `NoReturn`
+
+ℹ Unsafe fix
+151 151 | 
+152 152 | import abc
+153 153 | from abc import abstractmethod
+    154 |+from typing import NoReturn
+154 155 | 
+155 156 | 
+156 157 | class Foo(abc.ABC):
+--------------------------------------------------------------------------------
+200 201 |         return 3
+201 202 | 
+202 203 | 
+203     |-def func(x: int):
+    204 |+def func(x: int) -> NoReturn:
+204 205 |     if not x:
+205 206 |         raise ValueError
+206 207 |     else:
+
+auto_return_type.py:210:5: ANN201 [*] Missing return type annotation for public function `func`
+    |
+210 | def func(x: int):
+    |     ^^^^ ANN201
+211 |     if not x:
+212 |         raise ValueError
+    |
+    = help: Add return type annotation: `int`
+
+ℹ Unsafe fix
+207 207 |         raise TypeError
+208 208 | 
+209 209 | 
+210     |-def func(x: int):
+    210 |+def func(x: int) -> int:
+211 211 |     if not x:
+212 212 |         raise ValueError
+213 213 |     else:
+
 

crates/ruff_linter/src/rules/flake8_annotations/snapshots/ruff_linter__rules__flake8_annotations__tests__defaults.snap

@@ -1,14 +1,24 @@
 ---
 source: crates/ruff_linter/src/rules/flake8_annotations/mod.rs
 ---
-annotation_presence.py:5:5: ANN201 Missing return type annotation for public function `foo`
+annotation_presence.py:5:5: ANN201 [*] Missing return type annotation for public function `foo`
   |
 4 | # Error
 5 | def foo(a, b):
   |     ^^^ ANN201
 6 |     pass
   |
-  = help: Add return type annotation
+  = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+2 2 | from typing_extensions import override
+3 3 | 
+4 4 | # Error
+5   |-def foo(a, b):
+  5 |+def foo(a, b) -> None:
+6 6 |     pass
+7 7 | 
+8 8 | 
 
 annotation_presence.py:5:9: ANN001 Missing type annotation for function argument `a`
   |
@@ -26,14 +36,24 @@ annotation_presence.py:5:12: ANN001 Missing type annotation for function argumen
 6 |     pass
   |
 
-annotation_presence.py:10:5: ANN201 Missing return type annotation for public function `foo`
+annotation_presence.py:10:5: ANN201 [*] Missing return type annotation for public function `foo`
    |
  9 | # Error
 10 | def foo(a: int, b):
    |     ^^^ ANN201
 11 |     pass
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+7  7  | 
+8  8  | 
+9  9  | # Error
+10    |-def foo(a: int, b):
+   10 |+def foo(a: int, b) -> None:
+11 11 |     pass
+12 12 | 
+13 13 | 
 
 annotation_presence.py:10:17: ANN001 Missing type annotation for function argument `b`
    |
@@ -51,23 +71,43 @@ annotation_presence.py:15:17: ANN001 Missing type annotation for function argume
 16 |     pass
    |
 
-annotation_presence.py:20:5: ANN201 Missing return type annotation for public function `foo`
+annotation_presence.py:20:5: ANN201 [*] Missing return type annotation for public function `foo`
    |
 19 | # Error
 20 | def foo(a: int, b: int):
    |     ^^^ ANN201
 21 |     pass
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
 
-annotation_presence.py:25:5: ANN201 Missing return type annotation for public function `foo`
+ℹ Unsafe fix
+17 17 | 
+18 18 | 
+19 19 | # Error
+20    |-def foo(a: int, b: int):
+   20 |+def foo(a: int, b: int) -> None:
+21 21 |     pass
+22 22 | 
+23 23 | 
+
+annotation_presence.py:25:5: ANN201 [*] Missing return type annotation for public function `foo`
    |
 24 | # Error
 25 | def foo():
    |     ^^^ ANN201
 26 |     pass
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+22 22 | 
+23 23 | 
+24 24 | # Error
+25    |-def foo():
+   25 |+def foo() -> None:
+26 26 |     pass
+27 27 | 
+28 28 | 
 
 annotation_presence.py:45:12: ANN401 Dynamically typed expressions (typing.Any) are disallowed in `a`
    |

crates/ruff_linter/src/rules/flake8_annotations/snapshots/ruff_linter__rules__flake8_annotations__tests__ignore_fully_untyped.snap

@@ -1,13 +1,23 @@
 ---
 source: crates/ruff_linter/src/rules/flake8_annotations/mod.rs
 ---
-ignore_fully_untyped.py:24:5: ANN201 Missing return type annotation for public function `error_partially_typed_1`
+ignore_fully_untyped.py:24:5: ANN201 [*] Missing return type annotation for public function `error_partially_typed_1`
    |
 24 | def error_partially_typed_1(a: int, b):
    |     ^^^^^^^^^^^^^^^^^^^^^^^ ANN201
 25 |     pass
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+21 21 |     pass
+22 22 | 
+23 23 | 
+24    |-def error_partially_typed_1(a: int, b):
+   24 |+def error_partially_typed_1(a: int, b) -> None:
+25 25 |     pass
+26 26 | 
+27 27 | 
 
 ignore_fully_untyped.py:24:37: ANN001 Missing type annotation for function argument `b`
    |
@@ -23,15 +33,25 @@ ignore_fully_untyped.py:28:37: ANN001 Missing type annotation for function argum
 29 |     pass
    |
 
-ignore_fully_untyped.py:32:5: ANN201 Missing return type annotation for public function `error_partially_typed_3`
+ignore_fully_untyped.py:32:5: ANN201 [*] Missing return type annotation for public function `error_partially_typed_3`
    |
 32 | def error_partially_typed_3(a: int, b: int):
    |     ^^^^^^^^^^^^^^^^^^^^^^^ ANN201
 33 |     pass
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
 
-ignore_fully_untyped.py:43:9: ANN201 Missing return type annotation for public function `error_typed_self`
+ℹ Unsafe fix
+29 29 |     pass
+30 30 | 
+31 31 | 
+32    |-def error_partially_typed_3(a: int, b: int):
+   32 |+def error_partially_typed_3(a: int, b: int) -> None:
+33 33 |     pass
+34 34 | 
+35 35 | 
+
+ignore_fully_untyped.py:43:9: ANN201 [*] Missing return type annotation for public function `error_typed_self`
    |
 41 |         pass
 42 | 
@@ -39,6 +59,14 @@ ignore_fully_untyped.py:43:9: ANN201 Missing return type annotation for public f
    |         ^^^^^^^^^^^^^^^^ ANN201
 44 |         pass
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+40 40 |     def ok_untyped_method(self):
+41 41 |         pass
+42 42 | 
+43    |-    def error_typed_self(self: X):
+   43 |+    def error_typed_self(self: X) -> None:
+44 44 |         pass
 
 

crates/ruff_linter/src/rules/flake8_annotations/snapshots/ruff_linter__rules__flake8_annotations__tests__mypy_init_return.snap

@@ -41,14 +41,24 @@ mypy_init_return.py:11:9: ANN204 [*] Missing return type annotation for special
 13 13 | 
 14 14 | 
 
-mypy_init_return.py:40:5: ANN202 Missing return type annotation for private function `__init__`
+mypy_init_return.py:40:5: ANN202 [*] Missing return type annotation for private function `__init__`
    |
 39 | # Error
 40 | def __init__(self, foo: int):
    |     ^^^^^^^^ ANN202
 41 |     ...
    |
-   = help: Add return type annotation
+   = help: Add return type annotation: `None`
+
+ℹ Unsafe fix
+37 37 | 
+38 38 | 
+39 39 | # Error
+40    |-def __init__(self, foo: int):
+   40 |+def __init__(self, foo: int) -> None:
+41 41 |     ...
+42 42 | 
+43 43 | 
 
 mypy_init_return.py:47:9: ANN204 [*] Missing return type annotation for special method `__init__`
    |

crates/ruff_linter/src/rules/flake8_bandit/rules/hardcoded_bind_all_interfaces.rs

@@ -1,6 +1,9 @@
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::ExprStringLiteral;
+use ruff_python_ast::{self as ast, StringLike};
+use ruff_text_size::Ranged;
+
+use crate::checkers::ast::Checker;
 
 /// ## What it does
 /// Checks for hardcoded bindings to all network interfaces (`0.0.0.0`).
@@ -34,10 +37,16 @@ impl Violation for HardcodedBindAllInterfaces {
 }
 
 /// S104
-pub(crate) fn hardcoded_bind_all_interfaces(string: &ExprStringLiteral) -> Option<Diagnostic> {
-    if string.value.to_str() == "0.0.0.0" {
-        Some(Diagnostic::new(HardcodedBindAllInterfaces, string.range))
-    } else {
-        None
+pub(crate) fn hardcoded_bind_all_interfaces(checker: &mut Checker, string: StringLike) {
+    let is_bind_all_interface = match string {
+        StringLike::StringLiteral(ast::ExprStringLiteral { value, .. }) => value == "0.0.0.0",
+        StringLike::FStringLiteral(ast::FStringLiteralElement { value, .. }) => value == "0.0.0.0",
+        StringLike::BytesLiteral(_) => return,
+    };
+
+    if is_bind_all_interface {
+        checker
+            .diagnostics
+            .push(Diagnostic::new(HardcodedBindAllInterfaces, string.range()));
     }
 }