Indent expanded binary expressions

## Summary

Fixes #9974

## Test Plan

I added some new test cases.

.config/nextest.toml

@@ -0,0 +1,8 @@
+[profile.ci]
+# Print out output for failing tests as soon as they fail, and also at the end
+# of the run (for easy scrollability).
+failure-output = "immediate-final"
+# Do not cancel the test run on the first failure.
+fail-fast = false
+
+status-level = "skip"

.github/dependabot.yml

@@ -9,6 +9,10 @@ updates:
       actions:
         patterns:
           - "*"
+    ignore:
+      # The latest versions of these are not compatible with our release workflow
+      - dependency-name: "actions/upload-artifact"
+      - dependency-name: "actions/download-artifact"
 
   - package-ecosystem: "cargo"
     directory: "/"

.github/workflows/ci.yaml

@@ -35,7 +35,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: tj-actions/changed-files@v40
+      - uses: tj-actions/changed-files@v42
         id: changed
         with:
           files_yaml: |
@@ -76,6 +76,7 @@ jobs:
   cargo-fmt:
     name: "cargo fmt"
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -87,6 +88,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -100,21 +102,32 @@ jobs:
         run: cargo clippy -p ruff_wasm --target wasm32-unknown-unknown --all-features --locked -- -D warnings
 
   cargo-test-linux:
+    name: "cargo test (linux)"
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    name: "cargo test (linux)"
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
         run: rustup show
+      - name: "Install mold"
+        uses: rui314/setup-mold@v1
+      - name: "Install cargo nextest"
+        uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-nextest
       - name: "Install cargo insta"
         uses: taiki-e/install-action@v2
         with:
           tool: cargo-insta
       - uses: Swatinem/rust-cache@v2
       - name: "Run tests"
-        run: cargo insta test --all --all-features --unreferenced reject
+        shell: bash
+        env:
+          NEXTEST_PROFILE: "ci"
+        run: cargo insta test --all-features --unreferenced reject --test-runner nextest
+
       # Check for broken links in the documentation.
       - run: cargo doc --all --no-deps
         env:
@@ -126,29 +139,32 @@ jobs:
           path: target/debug/ruff
 
   cargo-test-windows:
+    name: "cargo test (windows)"
     runs-on: windows-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    name: "cargo test (windows)"
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
         run: rustup show
-      - name: "Install cargo insta"
+      - name: "Install cargo nextest"
         uses: taiki-e/install-action@v2
         with:
-          tool: cargo-insta
+          tool: cargo-nextest
       - uses: Swatinem/rust-cache@v2
       - name: "Run tests"
         shell: bash
-        # We can't reject unreferenced snapshots on windows because flake8_executable can't run on windows
-        run: cargo insta test --all --all-features
+        run: |
+          cargo nextest run --all-features --profile ci
+          cargo test --all-features --doc
 
   cargo-test-wasm:
+    name: "cargo test (wasm)"
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    name: "cargo test (wasm)"
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -166,10 +182,11 @@ jobs:
           wasm-pack test --node
 
   cargo-fuzz:
+    name: "cargo fuzz"
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    name: "cargo fuzz"
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -180,7 +197,7 @@ jobs:
       - name: "Install cargo-fuzz"
         uses: taiki-e/install-action@v2
         with:
-          tool: cargo-fuzz@0.11
+          tool: cargo-fuzz@0.11.2
       - run: cargo fuzz build -s none
 
   scripts:
@@ -188,6 +205,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
+    timeout-minutes: 5
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -213,6 +231,7 @@ jobs:
     if: github.event_name == 'pull_request' && ${{
       needs.determine_changes.outputs.code == 'true'
       }}
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -322,6 +341,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - name: "Install nightly Rust toolchain"
@@ -336,6 +356,7 @@ jobs:
   python-package:
     name: "python package"
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -360,6 +381,7 @@ jobs:
   pre-commit:
     name: "pre-commit"
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -371,7 +393,7 @@ jobs:
       - name: "Install pre-commit"
         run: pip install pre-commit
       - name: "Cache pre-commit"
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pre-commit
           key: pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
@@ -388,6 +410,7 @@ jobs:
   docs:
     name: "mkdocs"
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     env:
       MKDOCS_INSIDERS_SSH_KEY_EXISTS: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY != '' }}
     steps:
@@ -395,7 +418,7 @@ jobs:
       - uses: actions/setup-python@v5
       - name: "Add SSH key"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY }}
       - name: "Install Rust toolchain"
@@ -425,6 +448,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: determine_changes
     if: needs.determine_changes.outputs.formatter == 'true' || github.ref == 'refs/heads/main'
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -441,6 +465,7 @@ jobs:
   check-ruff-lsp:
     name: "test ruff-lsp"
     runs-on: ubuntu-latest
+    timeout-minutes: 5
     needs:
       - cargo-test-linux
       - determine_changes
@@ -484,6 +509,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: determine_changes
     if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
+    timeout-minutes: 20
     steps:
       - name: "Checkout Branch"
         uses: actions/checkout@v4

.github/workflows/docs.yaml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/setup-python@v5
       - name: "Add SSH key"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY }}
       - name: "Install Rust toolchain"
@@ -47,7 +47,7 @@ jobs:
         run: mkdocs build --strict -f mkdocs.public.yml
       - name: "Deploy to Cloudflare Pages"
         if: ${{ env.CF_API_TOKEN_EXISTS == 'true' }}
-        uses: cloudflare/wrangler-action@v3.3.2
+        uses: cloudflare/wrangler-action@v3.4.1
         with:
           apiToken: ${{ secrets.CF_API_TOKEN }}
           accountId: ${{ secrets.CF_ACCOUNT_ID }}

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

@@ -1,247 +0,0 @@
-name: "[flake8-to-ruff] Release"
-
-on: workflow_dispatch
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-env:
-  PACKAGE_NAME: flake8-to-ruff
-  CRATE_NAME: flake8_to_ruff
-  PYTHON_VERSION: "3.11"
-  CARGO_INCREMENTAL: 0
-  CARGO_NET_RETRY: 10
-  CARGO_TERM_COLOR: always
-  RUSTUP_MAX_RETRIES: 10
-
-jobs:
-  macos-x86_64:
-    runs-on: macos-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-          architecture: x64
-      - name: "Install Rust toolchain"
-        run: rustup show
-      - name: "Build wheels - x86_64"
-        uses: PyO3/maturin-action@v1
-        with:
-          target: x86_64
-          args: --release --out dist --sdist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - name: "Install built wheel - x86_64"
-        run: |
-          pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-  macos-universal:
-    runs-on: macos-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-          architecture: x64
-      - name: "Install Rust toolchain"
-        run: rustup show
-      - name: "Build wheels - universal2"
-        uses: PyO3/maturin-action@v1
-        with:
-          args: --release --target universal2-apple-darwin --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - name: "Install built wheel - universal2"
-        run: |
-          pip install dist/${{ env.CRATE_NAME }}-*universal2.whl --force-reinstall
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-
-  windows:
-    runs-on: windows-latest
-    strategy:
-      matrix:
-        target: [x64, x86]
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-          architecture: ${{ matrix.target }}
-      - name: "Install Rust toolchain"
-        run: rustup show
-      - name: "Build wheels"
-        uses: PyO3/maturin-action@v1
-        with:
-          target: ${{ matrix.target }}
-          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - name: "Install built wheel"
-        shell: bash
-        run: |
-          python -m pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-
-  linux:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        target: [x86_64, i686]
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-          architecture: x64
-      - name: "Build wheels"
-        uses: PyO3/maturin-action@v1
-        with:
-          target: ${{ matrix.target }}
-          manylinux: auto
-          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - name: "Install built wheel"
-        if: matrix.target == 'x86_64'
-        run: |
-          pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-
-  linux-cross:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        target: [aarch64, armv7, s390x, ppc64le, ppc64]
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-      - name: "Build wheels"
-        uses: PyO3/maturin-action@v1
-        with:
-          target: ${{ matrix.target }}
-          manylinux: auto
-          args: --no-default-features --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - uses: uraimo/run-on-arch-action@v2
-        if: matrix.target != 'ppc64'
-        name: Install built wheel
-        with:
-          arch: ${{ matrix.target }}
-          distro: ubuntu20.04
-          githubToken: ${{ github.token }}
-          install: |
-            apt-get update
-            apt-get install -y --no-install-recommends python3 python3-pip
-            pip3 install -U pip
-          run: |
-            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-
-  musllinux:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        target:
-          - x86_64-unknown-linux-musl
-          - i686-unknown-linux-musl
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-          architecture: x64
-      - name: "Build wheels"
-        uses: PyO3/maturin-action@v1
-        with:
-          target: ${{ matrix.target }}
-          manylinux: musllinux_1_2
-          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - name: "Install built wheel"
-        if: matrix.target == 'x86_64-unknown-linux-musl'
-        uses: addnab/docker-run-action@v3
-        with:
-          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
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-
-  musllinux-cross:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        platform:
-          - target: aarch64-unknown-linux-musl
-            arch: aarch64
-          - target: armv7-unknown-linux-musleabihf
-            arch: armv7
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-      - name: "Build wheels"
-        uses: PyO3/maturin-action@v1
-        with:
-          target: ${{ matrix.platform.target }}
-          manylinux: musllinux_1_2
-          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - uses: uraimo/run-on-arch-action@v2
-        name: Install built wheel
-        with:
-          arch: ${{ matrix.platform.arch }}
-          distro: alpine_latest
-          githubToken: ${{ github.token }}
-          install: |
-            apk add py3-pip
-          run: |
-            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: "Upload wheels"
-        uses: actions/upload-artifact@v3
-        with:
-          name: wheels
-          path: dist
-
-  release:
-    name: Release
-    runs-on: ubuntu-latest
-    needs:
-      - macos-universal
-      - macos-x86_64
-      - windows
-      - linux
-      - linux-cross
-      - musllinux
-      - musllinux-cross
-    steps:
-      - uses: actions/download-artifact@v3
-        with:
-          name: wheels
-      - uses: actions/setup-python@v5
-      - name: "Publish to PyPi"
-        env:
-          TWINE_USERNAME: __token__
-          TWINE_PASSWORD: ${{ secrets.FLAKE8_TO_RUFF_TOKEN }}
-        run: |
-          pip install --upgrade twine
-          twine upload --skip-existing *

.github/workflows/playground.yaml

@@ -40,7 +40,7 @@ jobs:
         working-directory: playground
       - name: "Deploy to Cloudflare Pages"
         if: ${{ env.CF_API_TOKEN_EXISTS == 'true' }}
-        uses: cloudflare/wrangler-action@v3.3.2
+        uses: cloudflare/wrangler-action@v3.4.1
         with:
           apiToken: ${{ secrets.CF_API_TOKEN }}
           accountId: ${{ secrets.CF_ACCOUNT_ID }}

.github/workflows/pr-comment.yaml

@@ -61,7 +61,7 @@ jobs:
           echo 'EOF' >> $GITHUB_OUTPUT
 
       - name: Find existing comment
-        uses: peter-evans/find-comment@v2
+        uses: peter-evans/find-comment@v3
         if: steps.generate-comment.outcome == 'success'
         id: find-comment
         with:
@@ -71,7 +71,7 @@ jobs:
 
       - name: Create or update comment
         if: steps.find-comment.outcome == 'success'
-        uses: peter-evans/create-or-update-comment@v3
+        uses: peter-evans/create-or-update-comment@v4
         with:
           comment-id: ${{ steps.find-comment.outputs.comment-id }}
           issue-number: ${{ steps.pr-number.outputs.pr-number }}

.pre-commit-config.yaml

@@ -4,7 +4,7 @@ exclude: |
   (?x)^(
     crates/ruff_linter/resources/.*|
     crates/ruff_linter/src/rules/.*/snapshots/.*|
-    crates/ruff_cli/resources/.*|
+    crates/ruff/resources/.*|
     crates/ruff_python_formatter/resources/.*|
     crates/ruff_python_formatter/tests/snapshots/.*|
     crates/ruff_python_resolver/resources/.*|

CHANGELOG.md

@@ -1,5 +1,436 @@
 # Changelog
 
+## 0.2.1
+
+This release includes support for range formatting (i.e., the ability to format specific lines
+within a source file).
+
+### Preview features
+
+- \[`refurb`\] Implement `missing-f-string-syntax` (`RUF027`) ([#9728](https://github.com/astral-sh/ruff/pull/9728))
+- Format module-level docstrings ([#9725](https://github.com/astral-sh/ruff/pull/9725))
+
+### Formatter
+
+- Add `--range` option to `ruff format` ([#9733](https://github.com/astral-sh/ruff/pull/9733))
+- Don't trim last empty line in docstrings ([#9813](https://github.com/astral-sh/ruff/pull/9813))
+
+### Bug fixes
+
+- Skip empty lines when determining base indentation ([#9795](https://github.com/astral-sh/ruff/pull/9795))
+- Drop `__get__` and `__set__` from `unnecessary-dunder-call` ([#9791](https://github.com/astral-sh/ruff/pull/9791))
+- Respect generic `Protocol` in ellipsis removal ([#9841](https://github.com/astral-sh/ruff/pull/9841))
+- Revert "Use publicly available Apple Silicon runners (#9726)" ([#9834](https://github.com/astral-sh/ruff/pull/9834))
+
+### Performance
+
+- Skip LibCST parsing for standard dedent adjustments ([#9769](https://github.com/astral-sh/ruff/pull/9769))
+- Remove CST-based fixer for `C408` ([#9822](https://github.com/astral-sh/ruff/pull/9822))
+- Add our own ignored-names abstractions ([#9802](https://github.com/astral-sh/ruff/pull/9802))
+- Remove CST-based fixers for `C400`, `C401`, `C410`, and `C418` ([#9819](https://github.com/astral-sh/ruff/pull/9819))
+- Use `AhoCorasick` to speed up quote match ([#9773](https://github.com/astral-sh/ruff/pull/9773))
+- Remove CST-based fixers for `C405` and `C409` ([#9821](https://github.com/astral-sh/ruff/pull/9821))
+- Add fast-path for comment detection ([#9808](https://github.com/astral-sh/ruff/pull/9808))
+- Invert order of checks in `zero-sleep-call` ([#9766](https://github.com/astral-sh/ruff/pull/9766))
+- Short-circuit typing matches based on imports ([#9800](https://github.com/astral-sh/ruff/pull/9800))
+- Run dunder method rule on methods directly ([#9815](https://github.com/astral-sh/ruff/pull/9815))
+- Track top-level module imports in the semantic model ([#9775](https://github.com/astral-sh/ruff/pull/9775))
+- Slight speed-up for lowercase and uppercase identifier checks ([#9798](https://github.com/astral-sh/ruff/pull/9798))
+- Remove LibCST-based fixer for `C403` ([#9818](https://github.com/astral-sh/ruff/pull/9818))
+
+### Documentation
+
+- Update `max-pos-args` example to `max-positional-args` ([#9797](https://github.com/astral-sh/ruff/pull/9797))
+- Fixed example code in `weak_cryptographic_key.rs` ([#9774](https://github.com/astral-sh/ruff/pull/9774))
+- Fix references to deprecated `ANN` rules in changelog ([#9771](https://github.com/astral-sh/ruff/pull/9771))
+- Fix default for `max-positional-args` ([#9838](https://github.com/astral-sh/ruff/pull/9838))
+
+## 0.2.0
+
+### Breaking changes
+
+- The `NURSERY` selector cannot be used anymore
+- Legacy selection of nursery rules by exact codes is no longer allowed without preview enabled
+
+See also, the "Remapped rules" section which may result in disabled rules.
+
+### Deprecations
+
+The following rules are now deprecated:
+
+- [`missing-type-self`](https://docs.astral.sh/ruff/rules/missing-type-self/) (`ANN101`)
+- [`missing-type-cls`](https://docs.astral.sh/ruff/rules/missing-type-cls/) (`ANN102`)
+
+The following command line options are now deprecated:
+
+- `--show-source`; use `--output-format full` instead
+- `--no-show-source`; use `--output-format concise` instead
+- `--output-format text`; use `full` or `concise` instead
+
+The following settings have moved and the previous name is deprecated:
+
+- `ruff.allowed-confusables` → [`ruff.lint.allowed-confusables`](https://docs.astral.sh//ruff/settings/#lint_allowed-confusables)
+- `ruff.dummy-variable-rgx` → [`ruff.lint.dummy-variable-rgx`](https://docs.astral.sh//ruff/settings/#lint_dummy-variable-rgx)
+- `ruff.explicit-preview-rules` → [`ruff.lint.explicit-preview-rules`](https://docs.astral.sh//ruff/settings/#lint_explicit-preview-rules)
+- `ruff.extend-fixable` → [`ruff.lint.extend-fixable`](https://docs.astral.sh//ruff/settings/#lint_extend-fixable)
+- `ruff.extend-ignore` → [`ruff.lint.extend-ignore`](https://docs.astral.sh//ruff/settings/#lint_extend-ignore)
+- `ruff.extend-per-file-ignores` → [`ruff.lint.extend-per-file-ignores`](https://docs.astral.sh//ruff/settings/#lint_extend-per-file-ignores)
+- `ruff.extend-safe-fixes` → [`ruff.lint.extend-safe-fixes`](https://docs.astral.sh//ruff/settings/#lint_extend-safe-fixes)
+- `ruff.extend-select` → [`ruff.lint.extend-select`](https://docs.astral.sh//ruff/settings/#lint_extend-select)
+- `ruff.extend-unfixable` → [`ruff.lint.extend-unfixable`](https://docs.astral.sh//ruff/settings/#lint_extend-unfixable)
+- `ruff.extend-unsafe-fixes` → [`ruff.lint.extend-unsafe-fixes`](https://docs.astral.sh//ruff/settings/#lint_extend-unsafe-fixes)
+- `ruff.external` → [`ruff.lint.external`](https://docs.astral.sh//ruff/settings/#lint_external)
+- `ruff.fixable` → [`ruff.lint.fixable`](https://docs.astral.sh//ruff/settings/#lint_fixable)
+- `ruff.flake8-annotations` → [`ruff.lint.flake8-annotations`](https://docs.astral.sh//ruff/settings/#lint_flake8-annotations)
+- `ruff.flake8-bandit` → [`ruff.lint.flake8-bandit`](https://docs.astral.sh//ruff/settings/#lint_flake8-bandit)
+- `ruff.flake8-bugbear` → [`ruff.lint.flake8-bugbear`](https://docs.astral.sh//ruff/settings/#lint_flake8-bugbear)
+- `ruff.flake8-builtins` → [`ruff.lint.flake8-builtins`](https://docs.astral.sh//ruff/settings/#lint_flake8-builtins)
+- `ruff.flake8-comprehensions` → [`ruff.lint.flake8-comprehensions`](https://docs.astral.sh//ruff/settings/#lint_flake8-comprehensions)
+- `ruff.flake8-copyright` → [`ruff.lint.flake8-copyright`](https://docs.astral.sh//ruff/settings/#lint_flake8-copyright)
+- `ruff.flake8-errmsg` → [`ruff.lint.flake8-errmsg`](https://docs.astral.sh//ruff/settings/#lint_flake8-errmsg)
+- `ruff.flake8-gettext` → [`ruff.lint.flake8-gettext`](https://docs.astral.sh//ruff/settings/#lint_flake8-gettext)
+- `ruff.flake8-implicit-str-concat` → [`ruff.lint.flake8-implicit-str-concat`](https://docs.astral.sh//ruff/settings/#lint_flake8-implicit-str-concat)
+- `ruff.flake8-import-conventions` → [`ruff.lint.flake8-import-conventions`](https://docs.astral.sh//ruff/settings/#lint_flake8-import-conventions)
+- `ruff.flake8-pytest-style` → [`ruff.lint.flake8-pytest-style`](https://docs.astral.sh//ruff/settings/#lint_flake8-pytest-style)
+- `ruff.flake8-quotes` → [`ruff.lint.flake8-quotes`](https://docs.astral.sh//ruff/settings/#lint_flake8-quotes)
+- `ruff.flake8-self` → [`ruff.lint.flake8-self`](https://docs.astral.sh//ruff/settings/#lint_flake8-self)
+- `ruff.flake8-tidy-imports` → [`ruff.lint.flake8-tidy-imports`](https://docs.astral.sh//ruff/settings/#lint_flake8-tidy-imports)
+- `ruff.flake8-type-checking` → [`ruff.lint.flake8-type-checking`](https://docs.astral.sh//ruff/settings/#lint_flake8-type-checking)
+- `ruff.flake8-unused-arguments` → [`ruff.lint.flake8-unused-arguments`](https://docs.astral.sh//ruff/settings/#lint_flake8-unused-arguments)
+- `ruff.ignore` → [`ruff.lint.ignore`](https://docs.astral.sh//ruff/settings/#lint_ignore)
+- `ruff.ignore-init-module-imports` → [`ruff.lint.ignore-init-module-imports`](https://docs.astral.sh//ruff/settings/#lint_ignore-init-module-imports)
+- `ruff.isort` → [`ruff.lint.isort`](https://docs.astral.sh//ruff/settings/#lint_isort)
+- `ruff.logger-objects` → [`ruff.lint.logger-objects`](https://docs.astral.sh//ruff/settings/#lint_logger-objects)
+- `ruff.mccabe` → [`ruff.lint.mccabe`](https://docs.astral.sh//ruff/settings/#lint_mccabe)
+- `ruff.pep8-naming` → [`ruff.lint.pep8-naming`](https://docs.astral.sh//ruff/settings/#lint_pep8-naming)
+- `ruff.per-file-ignores` → [`ruff.lint.per-file-ignores`](https://docs.astral.sh//ruff/settings/#lint_per-file-ignores)
+- `ruff.pycodestyle` → [`ruff.lint.pycodestyle`](https://docs.astral.sh//ruff/settings/#lint_pycodestyle)
+- `ruff.pydocstyle` → [`ruff.lint.pydocstyle`](https://docs.astral.sh//ruff/settings/#lint_pydocstyle)
+- `ruff.pyflakes` → [`ruff.lint.pyflakes`](https://docs.astral.sh//ruff/settings/#lint_pyflakes)
+- `ruff.pylint` → [`ruff.lint.pylint`](https://docs.astral.sh//ruff/settings/#lint_pylint)
+- `ruff.pyupgrade` → [`ruff.lint.pyupgrade`](https://docs.astral.sh//ruff/settings/#lint_pyupgrade)
+- `ruff.select` → [`ruff.lint.select`](https://docs.astral.sh//ruff/settings/#lint_select)
+- `ruff.task-tags` → [`ruff.lint.task-tags`](https://docs.astral.sh//ruff/settings/#lint_task-tags)
+- `ruff.typing-modules` → [`ruff.lint.typing-modules`](https://docs.astral.sh//ruff/settings/#lint_typing-modules)
+- `ruff.unfixable` → [`ruff.lint.unfixable`](https://docs.astral.sh//ruff/settings/#lint_unfixable)
+
+### Remapped rules
+
+The following rules have been remapped to new codes:
+
+- [`raise-without-from-inside-except`](https://docs.astral.sh/ruff/rules/raise-without-from-inside-except/): `TRY200` to `B904`
+- [`suspicious-eval-usage`](https://docs.astral.sh/ruff/rules/suspicious-eval-usage/): `PGH001` to `S307`
+- [`logging-warn`](https://docs.astral.sh/ruff/rules/logging-warn/): `PGH002` to `G010`
+- [`static-key-dict-comprehension`](https://docs.astral.sh/ruff/rules/static-key-dict-comprehension): `RUF011` to `B035`
+- [`runtime-string-union`](https://docs.astral.sh/ruff/rules/runtime-string-union): `TCH006` to `TCH010`
+
+### Stabilizations
+
+The following rules have been stabilized and are no longer in preview:
+
+- [`trio-timeout-without-await`](https://docs.astral.sh/ruff/rules/trio-timeout-without-await) (`TRIO100`)
+- [`trio-sync-call`](https://docs.astral.sh/ruff/rules/trio-sync-call) (`TRIO105`)
+- [`trio-async-function-with-timeout`](https://docs.astral.sh/ruff/rules/trio-async-function-with-timeout) (`TRIO109`)
+- [`trio-unneeded-sleep`](https://docs.astral.sh/ruff/rules/trio-unneeded-sleep) (`TRIO110`)
+- [`trio-zero-sleep-call`](https://docs.astral.sh/ruff/rules/trio-zero-sleep-call) (`TRIO115`)
+- [`unnecessary-escaped-quote`](https://docs.astral.sh/ruff/rules/unnecessary-escaped-quote) (`Q004`)
+- [`enumerate-for-loop`](https://docs.astral.sh/ruff/rules/enumerate-for-loop) (`SIM113`)
+- [`zip-dict-keys-and-values`](https://docs.astral.sh/ruff/rules/zip-dict-keys-and-values) (`SIM911`)
+- [`timeout-error-alias`](https://docs.astral.sh/ruff/rules/timeout-error-alias) (`UP041`)
+- [`flask-debug-true`](https://docs.astral.sh/ruff/rules/flask-debug-true) (`S201`)
+- [`tarfile-unsafe-members`](https://docs.astral.sh/ruff/rules/tarfile-unsafe-members) (`S202`)
+- [`ssl-insecure-version`](https://docs.astral.sh/ruff/rules/ssl-insecure-version) (`S502`)
+- [`ssl-with-bad-defaults`](https://docs.astral.sh/ruff/rules/ssl-with-bad-defaults) (`S503`)
+- [`ssl-with-no-version`](https://docs.astral.sh/ruff/rules/ssl-with-no-version) (`S504`)
+- [`weak-cryptographic-key`](https://docs.astral.sh/ruff/rules/weak-cryptographic-key) (`S505`)
+- [`ssh-no-host-key-verification`](https://docs.astral.sh/ruff/rules/ssh-no-host-key-verification) (`S507`)
+- [`django-raw-sql`](https://docs.astral.sh/ruff/rules/django-raw-sql) (`S611`)
+- [`mako-templates`](https://docs.astral.sh/ruff/rules/mako-templates) (`S702`)
+- [`generator-return-from-iter-method`](https://docs.astral.sh/ruff/rules/generator-return-from-iter-method) (`PYI058`)
+- [`runtime-string-union`](https://docs.astral.sh/ruff/rules/runtime-string-union) (`TCH006`)
+- [`numpy2-deprecation`](https://docs.astral.sh/ruff/rules/numpy2-deprecation) (`NPY201`)
+- [`quadratic-list-summation`](https://docs.astral.sh/ruff/rules/quadratic-list-summation) (`RUF017`)
+- [`assignment-in-assert`](https://docs.astral.sh/ruff/rules/assignment-in-assert) (`RUF018`)
+- [`unnecessary-key-check`](https://docs.astral.sh/ruff/rules/unnecessary-key-check) (`RUF019`)
+- [`never-union`](https://docs.astral.sh/ruff/rules/never-union) (`RUF020`)
+- [`direct-logger-instantiation`](https://docs.astral.sh/ruff/rules/direct-logger-instantiation) (`LOG001`)
+- [`invalid-get-logger-argument`](https://docs.astral.sh/ruff/rules/invalid-get-logger-argument) (`LOG002`)
+- [`exception-without-exc-info`](https://docs.astral.sh/ruff/rules/exception-without-exc-info) (`LOG007`)
+- [`undocumented-warn`](https://docs.astral.sh/ruff/rules/undocumented-warn) (`LOG009`)
+
+Fixes for the following rules have been stabilized and are now available without preview:
+
+- [`triple-single-quotes`](https://docs.astral.sh/ruff/rules/triple-single-quotes) (`D300`)
+- [`non-pep604-annotation`](https://docs.astral.sh/ruff/rules/non-pep604-annotation) (`UP007`)
+- [`dict-get-with-none-default`](https://docs.astral.sh/ruff/rules/dict-get-with-none-default) (`SIM910`)
+- [`in-dict-keys`](https://docs.astral.sh/ruff/rules/in-dict-keys) (`SIM118`)
+- [`collapsible-else-if`](https://docs.astral.sh/ruff/rules/collapsible-else-if) (`PLR5501`)
+- [`if-with-same-arms`](https://docs.astral.sh/ruff/rules/if-with-same-arms) (`SIM114`)
+- [`useless-else-on-loop`](https://docs.astral.sh/ruff/rules/useless-else-on-loop) (`PLW0120`)
+- [`unnecessary-literal-union`](https://docs.astral.sh/ruff/rules/unnecessary-literal-union) (`PYI030`)
+- [`unnecessary-spread`](https://docs.astral.sh/ruff/rules/unnecessary-spread) (`PIE800`)
+- [`error-instead-of-exception`](https://docs.astral.sh/ruff/rules/error-instead-of-exception) (`TRY400`)
+- [`redefined-while-unused`](https://docs.astral.sh/ruff/rules/redefined-while-unused) (`F811`)
+- [`duplicate-value`](https://docs.astral.sh/ruff/rules/duplicate-value) (`B033`)
+- [`multiple-imports-on-one-line`](https://docs.astral.sh/ruff/rules/multiple-imports-on-one-line) (`E401`)
+- [`non-pep585-annotation`](https://docs.astral.sh/ruff/rules/non-pep585-annotation) (`UP006`)
+
+Fixes for the following rules have been promoted from unsafe to safe:
+
+- [`unaliased-collections-abc-set-import`](https://docs.astral.sh/ruff/rules/unaliased-collections-abc-set-import) (`PYI025`)
+
+The following behaviors have been stabilized:
+
+- [`module-import-not-at-top-of-file`](https://docs.astral.sh/ruff/rules/module-import-not-at-top-of-file/) (`E402`) allows `sys.path` modifications between imports
+- [`reimplemented-container-builtin`](https://docs.astral.sh/ruff/rules/reimplemented-container-builtin/) (`PIE807`) includes lambdas that can be replaced with `dict`
+- [`unnecessary-placeholder`](https://docs.astral.sh/ruff/rules/unnecessary-placeholder/) (`PIE790`) applies to unnecessary ellipses (`...`)
+- [`if-else-block-instead-of-dict-get`](https://docs.astral.sh/ruff/rules/if-else-block-instead-of-dict-get/) (`SIM401`) applies to `if-else` expressions
+
+### Preview features
+
+- \[`refurb`\] Implement `metaclass_abcmeta` (`FURB180`) ([#9658](https://github.com/astral-sh/ruff/pull/9658))
+- Implement `blank_line_after_nested_stub_class` preview style ([#9155](https://github.com/astral-sh/ruff/pull/9155))
+- The preview rule [`and-or-ternary`](https://docs.astral.sh/ruff/rules/and-or-ternary) (`PLR1706`) was removed
+
+### Bug fixes
+
+- \[`flake8-async`\] Take `pathlib.Path` into account when analyzing async functions ([#9703](https://github.com/astral-sh/ruff/pull/9703))
+- \[`flake8-return`\] - fix indentation syntax error (`RET505`) ([#9705](https://github.com/astral-sh/ruff/pull/9705))
+- Detect multi-statement lines in else removal ([#9748](https://github.com/astral-sh/ruff/pull/9748))
+- `RUF022`, `RUF023`: never add two trailing commas to the end of a sequence ([#9698](https://github.com/astral-sh/ruff/pull/9698))
+- `RUF023`: Don't sort `__match_args__`, only `__slots__` ([#9724](https://github.com/astral-sh/ruff/pull/9724))
+- \[`flake8-simplify`\] - Fix syntax error in autofix (`SIM114`) ([#9704](https://github.com/astral-sh/ruff/pull/9704))
+- \[`pylint`\] Show verbatim constant in `magic-value-comparison` (`PLR2004`) ([#9694](https://github.com/astral-sh/ruff/pull/9694))
+- Removing trailing whitespace inside multiline strings is unsafe ([#9744](https://github.com/astral-sh/ruff/pull/9744))
+- Support `IfExp` with dual string arms in `invalid-envvar-default` ([#9734](https://github.com/astral-sh/ruff/pull/9734))
+- \[`pylint`\] Add `__mro_entries__` to known dunder methods (`PLW3201`) ([#9706](https://github.com/astral-sh/ruff/pull/9706))
+
+### Documentation
+
+- Removed rules are now retained in the documentation ([#9691](https://github.com/astral-sh/ruff/pull/9691))
+- Deprecated rules are now indicated in the documentation ([#9689](https://github.com/astral-sh/ruff/pull/9689))
+
+## 0.1.15
+
+### Preview features
+
+- Error when `NURSERY` selector is used with `--preview` ([#9682](https://github.com/astral-sh/ruff/pull/9682))
+- Preserve indentation around multiline strings in formatter ([#9637](https://github.com/astral-sh/ruff/pull/9637))
+- \[`flake8-return`\] Add fixes for all rules (`RET505`, `RET506`, `RET507`, `RET508`) ([#9595](https://github.com/astral-sh/ruff/pull/9595))
+- \[`flake8-simplify`\] Add fix for `if-with-same-arms` (`SIM114`) ([#9591](https://github.com/astral-sh/ruff/pull/9591))
+- \[`pycodestyle`\] Add fix for `multiple-imports-on-one-line` (`E401`) ([#9518](https://github.com/astral-sh/ruff/pull/9518))
+- \[`pylint`\] Add fix for `collapsible-else-if` (`PLR5501`) ([#9594](https://github.com/astral-sh/ruff/pull/9594))
+- \[`pylint`\] Add fix for `useless-else-on-loop` (`PLW0120`) ([#9590](https://github.com/astral-sh/ruff/pull/9590))
+- \[`pylint`\] Implement `assigning-non-slot` (`E0237`) ([#9623](https://github.com/astral-sh/ruff/pull/9623))
+- \[`pylint`\] Implement `potential-index-error` (`PLE0643`) ([#9545](https://github.com/astral-sh/ruff/pull/9545))
+- \[`pylint`\] Implement `too-many-nested-blocks` (`PLR1702`) ([#9172](https://github.com/astral-sh/ruff/pull/9172))
+- \[`ruff`\] Add rule to sort `__slots__` and `__match_args__` ([#9564](https://github.com/astral-sh/ruff/pull/9564))
+- \[`ruff`\] Detect unnecessary `dict` comprehensions for iterables (`RUF025`) ([#9613](https://github.com/astral-sh/ruff/pull/9613))
+- \[`ruff`\] Guard against use of `default_factory` as a keyword argument (`RUF026`) ([#9651](https://github.com/astral-sh/ruff/pull/9651))
+- \[`ruff`\] Implement `mutable-fromkeys-value` (`RUF024`) ([#9597](https://github.com/astral-sh/ruff/pull/9597))
+
+### CLI
+
+- Enable auto-wrapping of `--help` output ([#9633](https://github.com/astral-sh/ruff/pull/9633))
+
+### Bug fixes
+
+- Avoid rendering display-only rules as fixable ([#9649](https://github.com/astral-sh/ruff/pull/9649))
+- Detect automagic-like assignments in notebooks ([#9653](https://github.com/astral-sh/ruff/pull/9653))
+- Generate custom JSON schema for dynamic setting ([#9632](https://github.com/astral-sh/ruff/pull/9632))
+- \[`flake8-no-pep420`\] Include global `--config` when determining namespace packages ([#9603](https://github.com/astral-sh/ruff/pull/9603))
+- \[`flake8-pie`\] Omit bound tuples passed to `.startswith` or `.endswith` ([#9661](https://github.com/astral-sh/ruff/pull/9661))
+- \[`flake8-return`\] Avoid panic when fixing inlined else blocks ([#9657](https://github.com/astral-sh/ruff/pull/9657))
+- \[`flake8-return`\] Consider exception suppression in unnecessary assignment ([#9673](https://github.com/astral-sh/ruff/pull/9673))
+- \[`flake8-return`\] Take `NoReturn` annotation into account when analyzing implicit returns ([#9636](https://github.com/astral-sh/ruff/pull/9636))
+- \[`flake8-simplify`\] Support inverted returns in `needless-bool` (`SIM103`) ([#9619](https://github.com/astral-sh/ruff/pull/9619))
+- \[`flake8-type-checking`\] Add Pydantic's `BaseConfig` to default-copy list ([#9650](https://github.com/astral-sh/ruff/pull/9650))
+- \[`flake8-type-checking`\] Avoid marking `InitVar` as a typing-only annotation ([#9688](https://github.com/astral-sh/ruff/pull/9688))
+- \[`pycodestyle`\] Allow `dtype` comparisons in `type-comparison` ([#9676](https://github.com/astral-sh/ruff/pull/9676))
+- \[`pydocstyle`\] Re-implement `last-line-after-section` (`D413`) ([#9654](https://github.com/astral-sh/ruff/pull/9654))
+
+### Documentation
+
+- \[`flake8-pytest-style`\] Add fix safety documentation for `duplicate-parameterize-test-cases` ([#9678](https://github.com/astral-sh/ruff/pull/9678))
+- \[`pylint`\] Document `literal-membership` fix safety conditions ([#9677](https://github.com/astral-sh/ruff/pull/9677))
+- \[`isort`\] Fix reference to `isort` rule code ([#9598](https://github.com/astral-sh/ruff/pull/9598))
+
+## 0.1.14
+
+### Preview features
+
+- \[`flake8-bugbear`\] Add fix for `duplicate-value` (`B033`) ([#9510](https://github.com/astral-sh/ruff/pull/9510))
+- \[`flake8-simplify`\] Implement `enumerate-for-loop` (`SIM113`) ([#7777](https://github.com/astral-sh/ruff/pull/7777))
+- \[`pygrep_hooks`\] Add fix for `deprecated-log-warn` (`PGH002`) ([#9519](https://github.com/astral-sh/ruff/pull/9519))
+- \[`pylint`\] Implement `import-private-name` (`C2701`) ([#5920](https://github.com/astral-sh/ruff/pull/5920))
+- \[`refurb`\] Implement `regex-flag-alias` with fix (`FURB167`) ([#9516](https://github.com/astral-sh/ruff/pull/9516))
+- \[`ruff`\] Add rule and fix to sort contents of `__all__` (`RUF022`) ([#9474](https://github.com/astral-sh/ruff/pull/9474))
+- \[`tryceratops`\] Add fix for `error-instead-of-exception` (`TRY400`) ([#9520](https://github.com/astral-sh/ruff/pull/9520))
+
+### Rule changes
+
+- \[`flake8-pyi`\] Fix `PYI047` false negatives on PEP-695 type aliases ([#9566](https://github.com/astral-sh/ruff/pull/9566))
+- \[`flake8-pyi`\] Fix `PYI049` false negatives on call-based `TypedDict`s ([#9567](https://github.com/astral-sh/ruff/pull/9567))
+- \[`pylint`\] Exclude `self` and `cls` when counting method arguments (`PLR0917`) ([#9563](https://github.com/astral-sh/ruff/pull/9563))
+
+### CLI
+
+- `--show-settings` displays active settings in a far more readable format ([#9464](https://github.com/astral-sh/ruff/pull/9464))
+- Add `--extension` support to the formatter ([#9483](https://github.com/astral-sh/ruff/pull/9483))
+
+### Configuration
+
+- Ignore preview status for fixable and unfixable selectors ([#9538](https://github.com/astral-sh/ruff/pull/9538))
+- \[`pycodestyle`\] Use the configured tab size when expanding indents ([#9506](https://github.com/astral-sh/ruff/pull/9506))
+
+### Bug fixes
+
+- Recursively visit deferred AST nodes ([#9541](https://github.com/astral-sh/ruff/pull/9541))
+- Visit deferred lambdas before type definitions ([#9540](https://github.com/astral-sh/ruff/pull/9540))
+- \[`flake8-simplify`\] Avoid some more `enumerate-for-loop` false positives (`SIM113`) ([#9515](https://github.com/astral-sh/ruff/pull/9515))
+- \[`pandas-vet`\] Limit inplace diagnostics to methods that accept inplace ([#9495](https://github.com/astral-sh/ruff/pull/9495))
+- \[`pylint`\] Add the `__prepare__` method to the list of recognized dunder method ([#9529](https://github.com/astral-sh/ruff/pull/9529))
+- \[`pylint`\] Ignore unnecessary dunder calls within dunder definitions ([#9496](https://github.com/astral-sh/ruff/pull/9496))
+- \[`refurb`\] Avoid bailing when `reimplemented-operator` is called on function (`FURB118`) ([#9556](https://github.com/astral-sh/ruff/pull/9556))
+- \[`ruff`\] Avoid treating named expressions as static keys (`RUF011`) ([#9494](https://github.com/astral-sh/ruff/pull/9494))
+
+### Documentation
+
+- Add instructions on using `noqa` with isort rules ([#9555](https://github.com/astral-sh/ruff/pull/9555))
+- Documentation update for URL giving 'page not found' ([#9565](https://github.com/astral-sh/ruff/pull/9565))
+- Fix admonition in dark mode ([#9502](https://github.com/astral-sh/ruff/pull/9502))
+- Update contributing docs to use `cargo bench -p ruff_benchmark` ([#9535](https://github.com/astral-sh/ruff/pull/9535))
+- Update emacs integration section to include `emacs-ruff-format` ([#9403](https://github.com/astral-sh/ruff/pull/9403))
+- \[`flake8-blind-except`\] Document exceptions to `blind-except` rule ([#9580](https://github.com/astral-sh/ruff/pull/9580))
+
+## 0.1.13
+
+### Bug fixes
+
+- Include base pyproject when initializing cache settings ([#9480](https://github.com/astral-sh/ruff/pull/9480))
+- \[`flake8-simplify`\] Account for possibly-empty f-string values in truthiness logic ([#9484](https://github.com/astral-sh/ruff/pull/9484))
+- \[`pylint`\] Add the missing period in `unnecessary-dunder-call` ([#9485](https://github.com/astral-sh/ruff/pull/9485))
+- \[`pylint`\] Fix `__aenter__` message in `unnecessary-dunder-call` ([#9492](https://github.com/astral-sh/ruff/pull/9492))
+
+## 0.1.12
+
+### Preview features
+
+- Formatter: Hug multiline-strings in preview style ([#9243](https://github.com/astral-sh/ruff/pull/9243))
+- \[`flake8-bandit`\] Add `ssl-with-no-version` (`S504`) ([#9384](https://github.com/astral-sh/ruff/pull/9384))
+- \[`flake8-bandit`\] Implement `ssl-insecure-version` (`S502`) ([#9390](https://github.com/astral-sh/ruff/pull/9390))
+- \[`flake8-bandit`\] Implement `ssl-with-bad-defaults` (`S503`) ([#9391](https://github.com/astral-sh/ruff/pull/9391))
+- \[`flake8-bandit`\] Implement suspicious import rules (`S4XX`) ([#8831](https://github.com/astral-sh/ruff/pull/8831))
+- \[`flake8-simplify`\] Implement `zip-dict-keys-and-values` (`SIM911`) ([#9460](https://github.com/astral-sh/ruff/pull/9460))
+- \[`pyflakes`\] Add a fix for `redefined-while-unused` (`F811`) ([#9419](https://github.com/astral-sh/ruff/pull/9419))
+- \[`pylint`\] Implement `unnecessary-dunder-call` (`C2801`) ([#9166](https://github.com/astral-sh/ruff/pull/9166))
+- \[`ruff`\] Add `parenthesize-chained-operators` (`RUF021`) to enforce parentheses in `a or b and c` ([#9440](https://github.com/astral-sh/ruff/pull/9440))
+
+### Rule changes
+
+- \[`flake8-boolean-trap`\] Allow Boolean positional arguments in setters ([#9429](https://github.com/astral-sh/ruff/pull/9429))
+- \[`flake8-builtins`\] Restrict `builtin-attribute-shadowing` (`A003`) to actual shadowed references ([#9462](https://github.com/astral-sh/ruff/pull/9462))
+- \[`flake8-pyi`\] Add fix for `generator-return-from-iter-method` (`PYI058`) ([#9355](https://github.com/astral-sh/ruff/pull/9355))
+- \[`pyflakes`\] Don't flag `redefined-while-unused` (`F811`) in `if` branches ([#9418](https://github.com/astral-sh/ruff/pull/9418))
+- \[`pyupgrade`\] Add some additional Python 3.12 typing members to `deprecated-import` ([#9445](https://github.com/astral-sh/ruff/pull/9445))
+- \[`ruff`\] Add fix for `parenthesize-chained-operators` (`RUF021`) ([#9449](https://github.com/astral-sh/ruff/pull/9449))
+- \[`ruff`\] Include subscripts and attributes in static key rule (`RUF011`) ([#9416](https://github.com/astral-sh/ruff/pull/9416))
+- \[`ruff`\] Support variable keys in static dictionary key rule (`RUF011`) ([#9411](https://github.com/astral-sh/ruff/pull/9411))
+
+### Formatter
+
+- Generate deterministic IDs when formatting notebooks ([#9359](https://github.com/astral-sh/ruff/pull/9359))
+- Allow `# fmt: skip` with interspersed same-line comments ([#9395](https://github.com/astral-sh/ruff/pull/9395))
+- Parenthesize breaking named expressions in match guards ([#9396](https://github.com/astral-sh/ruff/pull/9396))
+
+### Bug fixes
+
+- Add cell indexes to all diagnostics ([#9387](https://github.com/astral-sh/ruff/pull/9387))
+- Avoid infinite loop in constant vs. `None` comparisons ([#9376](https://github.com/astral-sh/ruff/pull/9376))
+- Handle raises with implicit alternate branches ([#9377](https://github.com/astral-sh/ruff/pull/9377))
+- Ignore trailing quotes for unclosed l-brace errors ([#9388](https://github.com/astral-sh/ruff/pull/9388))
+- Respect multi-segment submodule imports when resolving qualified names ([#9382](https://github.com/astral-sh/ruff/pull/9382))
+- Use `DisplayParseError` for stdin parser errors ([#9409](https://github.com/astral-sh/ruff/pull/9409))
+- Use `comment_ranges` for isort directive extraction ([#9414](https://github.com/astral-sh/ruff/pull/9414))
+- Use transformed source code for diagnostic locations ([#9408](https://github.com/astral-sh/ruff/pull/9408))
+- \[`flake8-pyi`\] Exclude `warnings.deprecated` and `typing_extensions.deprecated` arguments ([#9423](https://github.com/astral-sh/ruff/pull/9423))
+- \[`flake8-pyi`\] Fix false negative for `unused-private-protocol` (`PYI046`) with unused generic protocols ([#9405](https://github.com/astral-sh/ruff/pull/9405))
+- \[`pydocstyle`\] Disambiguate argument descriptors from section headers ([#9427](https://github.com/astral-sh/ruff/pull/9427))
+- \[`pylint`\] Homogenize `PLR0914` message to match other `PLR09XX` rules ([#9399](https://github.com/astral-sh/ruff/pull/9399))
+- \[`ruff`\] Allow `Hashable = None` in type annotations (`RUF013`) ([#9442](https://github.com/astral-sh/ruff/pull/9442))
+
+### Documentation
+
+- Fix admonition hyperlink colouring ([#9385](https://github.com/astral-sh/ruff/pull/9385))
+- Add missing preview link ([#9386](https://github.com/astral-sh/ruff/pull/9386))
+
+## 0.1.11
+
+### Preview features
+
+- \[`pylint`\] Implement `super-without-brackets` (`W0245`) ([#9257](https://github.com/astral-sh/ruff/pull/9257))
+
+### Bug fixes
+
+- Check path string properly in `python -m ruff` invocations ([#9367](https://github.com/astral-sh/ruff/pull/9367))
+
+### Documentation
+
+- Tweak `relative-imports` message ([#9365](https://github.com/astral-sh/ruff/pull/9365))
+- Add fix safety note for `yield-in-for-loop` ([#9364](https://github.com/astral-sh/ruff/pull/9364))
+
+## 0.1.10
+
+### Preview features
+
+- Improve `dummy_implementations` preview style formatting ([#9240](https://github.com/astral-sh/ruff/pull/9240))
+- Normalise Hex and unicode escape sequences in strings ([#9280](https://github.com/astral-sh/ruff/pull/9280))
+- Parenthesize long type annotations in annotated assignments ([#9210](https://github.com/astral-sh/ruff/pull/9210))
+- Parenthesize multi-context managers in `with` statements ([#9222](https://github.com/astral-sh/ruff/pull/9222))
+- \[`flake8-pyi`\] Implement `generator-return-from-iter-method` (`PYI058`) ([#9313](https://github.com/astral-sh/ruff/pull/9313))
+- \[`pylint`\] Implement `empty-comment` (`PLR2044`) ([#9174](https://github.com/astral-sh/ruff/pull/9174))
+- \[`refurb`\] Implement `bit-count` (`FURB161`) ([#9265](https://github.com/astral-sh/ruff/pull/9265))
+- \[`ruff`\] Add `never-union` rule to detect redundant `typing.NoReturn` and `typing.Never` ([#9217](https://github.com/astral-sh/ruff/pull/9217))
+
+### CLI
+
+- Add paths to TOML parse errors ([#9358](https://github.com/astral-sh/ruff/pull/9358))
+- Add row and column numbers to formatter parse errors ([#9321](https://github.com/astral-sh/ruff/pull/9321))
+- Improve responsiveness when invoked via Python ([#9315](https://github.com/astral-sh/ruff/pull/9315))
+- Short rule messages should not end with a period ([#9345](https://github.com/astral-sh/ruff/pull/9345))
+
+### Configuration
+
+- Respect runtime-required decorators on functions ([#9317](https://github.com/astral-sh/ruff/pull/9317))
+
+### Bug fixes
+
+- Avoid `asyncio-dangling-task` for nonlocal and global bindings ([#9263](https://github.com/astral-sh/ruff/pull/9263))
+- Escape trailing placeholders in rule documentation ([#9301](https://github.com/astral-sh/ruff/pull/9301))
+- Fix continuation detection following multi-line strings ([#9332](https://github.com/astral-sh/ruff/pull/9332))
+- Fix scoping for generators in named expressions in classes ([#9248](https://github.com/astral-sh/ruff/pull/9248))
+- Port from obsolete wsl crate to is-wsl ([#9356](https://github.com/astral-sh/ruff/pull/9356))
+- Remove special pre-visit for module docstrings ([#9261](https://github.com/astral-sh/ruff/pull/9261))
+- Respect `__str__` definitions from super classes ([#9338](https://github.com/astral-sh/ruff/pull/9338))
+- Respect `unused-noqa` via `per-file-ignores` ([#9300](https://github.com/astral-sh/ruff/pull/9300))
+- Respect attribute chains when resolving builtin call paths ([#9309](https://github.com/astral-sh/ruff/pull/9309))
+- Treat all `typing_extensions` members as typing aliases ([#9335](https://github.com/astral-sh/ruff/pull/9335))
+- Use `Display` for formatter parse errors ([#9316](https://github.com/astral-sh/ruff/pull/9316))
+- Wrap subscripted dicts in parens for f-string conversion ([#9238](https://github.com/astral-sh/ruff/pull/9238))
+- \[`flake8-annotations`\] Avoid adding return types to stub methods ([#9277](https://github.com/astral-sh/ruff/pull/9277))
+- \[`flake8-annotations`\] Respect mixed `return` and `raise` cases in return-type analysis ([#9310](https://github.com/astral-sh/ruff/pull/9310))
+- \[`flake8-bandit`\] Don't report violations when `SafeLoader` is imported from `yaml.loader` (`S506`) ([#9299](https://github.com/astral-sh/ruff/pull/9299))
+- \[`pylint`\] Avoid panic when comment is preceded by Unicode ([#9331](https://github.com/astral-sh/ruff/pull/9331))
+- \[`pylint`\] Change `PLR0917` error message to match other `PLR09XX` messages ([#9308](https://github.com/astral-sh/ruff/pull/9308))
+- \[`refurb`\] Avoid false positives for `math-constant` (`FURB152`) ([#9290](https://github.com/astral-sh/ruff/pull/9290))
+
+### Documentation
+
+- Expand target name for better rule documentation ([#9302](https://github.com/astral-sh/ruff/pull/9302))
+- Fix typos found by codespell ([#9346](https://github.com/astral-sh/ruff/pull/9346))
+- \[`perflint`\] Document `PERF102` fix un-safety ([#9351](https://github.com/astral-sh/ruff/pull/9351))
+- \[`pyupgrade`\] Document `UP007` fix un-safety ([#9306](https://github.com/astral-sh/ruff/pull/9306))
+
 ## 0.1.9
 
 ### Breaking changes

CONTRIBUTING.md

@@ -26,6 +26,10 @@ Welcome! We're happy to have you here. Thank you in advance for your contributio
 - [`cargo dev`](#cargo-dev)
 - [Subsystems](#subsystems)
     - [Compilation Pipeline](#compilation-pipeline)
+    - [Import Categorization](#import-categorization)
+        - [Project root](#project-root)
+        - [Package root](#package-root)
+        - [Import categorization](#import-categorization-1)
 
 ## The Basics
 
@@ -63,7 +67,7 @@ You'll also need [Insta](https://insta.rs/docs/) to update snapshot tests:
 cargo install cargo-insta
 ```
 
-and pre-commit to run some validation checks:
+And you'll need pre-commit to run some validation checks:
 
 ```shell
 pipx install pre-commit  # or `pip install pre-commit` if you have a virtualenv
@@ -76,12 +80,22 @@ when making a commit:
 pre-commit install
 ```
 
+We recommend [nextest](https://nexte.st/) to run Ruff's test suite (via `cargo nextest run`),
+though it's not strictly necessary:
+
+```shell
+cargo install cargo-nextest --locked
+```
+
+Throughout this guide, any usages of `cargo test` can be replaced with `cargo nextest run`,
+if you choose to install `nextest`.
+
 ### Development
 
 After cloning the repository, run Ruff locally from the repository root with:
 
 ```shell
-cargo run -p ruff_cli -- check /path/to/file.py --no-cache
+cargo run -p ruff -- check /path/to/file.py --no-cache
 ```
 
 Prior to opening a pull request, ensure that your code has been auto-formatted,
@@ -120,7 +134,7 @@ At the time of writing, the repository includes the following crates:
     If you're working on a rule, this is the crate for you.
 - `crates/ruff_benchmark`: binary crate for running micro-benchmarks.
 - `crates/ruff_cache`: library crate for caching lint results.
-- `crates/ruff_cli`: binary crate containing Ruff's command-line interface.
+- `crates/ruff`: binary crate containing Ruff's command-line interface.
 - `crates/ruff_dev`: binary crate containing utilities used in the development of Ruff itself (e.g.,
     `cargo dev generate-all`), see the [`cargo dev`](#cargo-dev) section below.
 - `crates/ruff_diagnostics`: library crate for the rule-independent abstractions in the lint
@@ -231,7 +245,7 @@ Once you've completed the code for the rule itself, you can define tests with th
     For example, if you're adding a new rule named `E402`, you would run:
 
     ```shell
-    cargo run -p ruff_cli -- check crates/ruff_linter/resources/test/fixtures/pycodestyle/E402.py --no-cache --select E402
+    cargo run -p ruff -- check crates/ruff_linter/resources/test/fixtures/pycodestyle/E402.py --no-cache --preview --select E402
     ```
 
     **Note:** Only a subset of rules are enabled by default. When testing a new rule, ensure that
@@ -252,7 +266,7 @@ Once you've completed the code for the rule itself, you can define tests with th
 
 Ruff's user-facing settings live in a few different places.
 
-First, the command-line options are defined via the `Args` struct in `crates/ruff_cli/src/args.rs`.
+First, the command-line options are defined via the `Args` struct in `crates/ruff/src/args.rs`.
 
 Second, the `pyproject.toml` options are defined in `crates/ruff_workspace/src/options.rs` (via the
 `Options` struct), `crates/ruff_workspace/src/configuration.rs` (via the `Configuration` struct),
@@ -370,9 +384,14 @@ See the [ruff-ecosystem package](https://github.com/astral-sh/ruff/tree/main/pyt
 We have several ways of benchmarking and profiling Ruff:
 
 - Our main performance benchmark comparing Ruff with other tools on the CPython codebase
-- Microbenchmarks which the linter or the formatter on individual files. There run on pull requests.
+- Microbenchmarks which run the linter or the formatter on individual files. These run on pull requests.
 - Profiling the linter on either the microbenchmarks or entire projects
 
+> \[!NOTE\]
+> When running benchmarks, ensure that your CPU is otherwise idle (e.g., close any background
+> applications, like web browsers). You may also want to switch your CPU to a "performance"
+> mode, if it exists, especially when benchmarking short-lived processes.
+
 ### CPython Benchmark
 
 First, clone [CPython](https://github.com/python/cpython). It's a large and diverse Python codebase,
@@ -518,10 +537,10 @@ if the benchmark improved/regressed compared to that baseline.
 
 ```shell
 # Run once on your "baseline" code
-cargo benchmark --save-baseline=main
+cargo bench -p ruff_benchmark -- --save-baseline=main
 
 # Then iterate with
-cargo benchmark --baseline=main
+cargo bench -p ruff_benchmark -- --baseline=main
 ```
 
 #### PR Summary
@@ -531,10 +550,10 @@ This is useful to illustrate the improvements of a PR.
 
 ```shell
 # On main
-cargo benchmark --save-baseline=main
+cargo bench -p ruff_benchmark -- --save-baseline=main
 
 # After applying your changes
-cargo benchmark --save-baseline=pr
+cargo bench -p ruff_benchmark -- --save-baseline=pr
 
 critcmp main pr
 ```
@@ -547,10 +566,10 @@ cargo install critcmp
 
 #### Tips
 
-- Use `cargo benchmark <filter>` to only run specific benchmarks. For example: `cargo benchmark linter/pydantic`
-    to only run the pydantic tests.
-- Use `cargo benchmark --quiet` for a more cleaned up output (without statistical relevance)
-- Use `cargo benchmark --quick` to get faster results (more prone to noise)
+- Use `cargo bench -p ruff_benchmark <filter>` to only run specific benchmarks. For example: `cargo benchmark lexer`
+    to only run the lexer benchmarks.
+- Use `cargo bench -p ruff_benchmark -- --quiet` for a more cleaned up output (without statistical relevance)
+- Use `cargo bench -p ruff_benchmark -- --quick` to get faster results (more prone to noise)
 
 ### Profiling Projects
 
@@ -618,7 +637,7 @@ Otherwise, follow the instructions from the linux section.
 utils with it:
 
 - `cargo dev print-ast <file>`: Print the AST of a python file using the
-    [RustPython parser](https://github.com/astral-sh/RustPython-Parser/tree/main/parser) that is
+    [RustPython parser](https://github.com/astral-sh/ruff/tree/main/crates/ruff_python_parser) that is
     mainly used in Ruff. For `if True: pass # comment`, you can see the syntax tree, the byte offsets
     for start and stop of each node and also how the `:` token, the comment and whitespace are not
     represented anymore:

Cargo.toml

@@ -12,48 +12,104 @@ authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 license = "MIT"
 
 [workspace.dependencies]
-anyhow = { version = "1.0.76" }
+aho-corasick = { version = "1.1.2" }
+annotate-snippets = { version = "0.9.2", features = ["color"] }
+anyhow = { version = "1.0.79" }
+argfile = { version = "0.1.6" }
+assert_cmd = { version = "2.0.13" }
+bincode = { version = "1.3.3" }
 bitflags = { version = "2.4.1" }
-chrono = { version = "0.4.31", default-features = false, features = ["clock"] }
-clap = { version = "4.4.7", features = ["derive"] }
+bstr = { version = "1.9.0" }
+cachedir = { version = "0.3.1" }
+chrono = { version = "0.4.34", default-features = false, features = ["clock"] }
+clap = { version = "4.4.18", features = ["derive"] }
+clap_complete_command = { version = "0.5.1" }
+clearscreen = { version = "2.0.0" }
+codspeed-criterion-compat = { version = "2.3.3", default-features = false }
 colored = { version = "2.1.0" }
+configparser = { version = "3.0.3" }
+console_error_panic_hook = { version = "0.1.7" }
+console_log = { version = "1.0.0" }
+countme = { version ="3.0.1"}
+criterion = { version = "0.5.1", default-features = false }
+dirs = { version = "5.0.0" }
+drop_bomb = { version = "0.1.5" }
+env_logger = { version ="0.10.1"}
+fern = { version = "0.6.1" }
 filetime = { version = "0.2.23" }
+fs-err = { version ="2.11.0"}
 glob = { version = "0.3.1" }
 globset = { version = "0.4.14" }
-ignore = { version = "0.4.21" }
+hexf-parse = { version ="0.2.1"}
+ignore = { version = "0.4.22" }
+imara-diff ={ version = "0.1.5"}
+imperative = { version = "1.0.4" }
+indicatif ={ version = "0.17.8"}
+indoc ={ version = "2.0.4"}
 insta = { version = "1.34.0", feature = ["filters", "glob"] }
-is-macro = { version = "0.3.1" }
-itertools = { version = "0.11.0" }
+insta-cmd = { version = "0.4.0" }
+is-macro = { version = "0.3.5" }
+is-wsl = { version = "0.4.0" }
+itertools = { version = "0.12.1" }
+js-sys = { version = "0.3.67" }
+lalrpop-util = { version = "0.20.0", default-features = false }
+lexical-parse-float = { version = "0.8.0", features = ["format"] }
 libcst = { version = "1.1.0", default-features = false }
 log = { version = "0.4.17" }
-memchr = { version = "2.6.4" }
+memchr = { version = "2.7.1" }
+mimalloc = { version ="0.1.39"}
+natord = { version = "1.0.9" }
+notify = { version = "6.1.1" }
 once_cell = { version = "1.19.0" }
 path-absolutize = { version = "3.1.1" }
-proc-macro2 = { version = "1.0.71" }
+pathdiff = { version = "0.2.1" }
+pep440_rs = { version = "0.4.0", features = ["serde"] }
+pretty_assertions = "1.3.0"
+proc-macro2 = { version = "1.0.78" }
+pyproject-toml = { version = "0.9.0" }
+quick-junit = { version = "0.3.5" }
 quote = { version = "1.0.23" }
+rand = { version = "0.8.5" }
+rayon = { version = "1.8.1" }
 regex = { version = "1.10.2" }
+result-like = { version = "0.5.0" }
 rustc-hash = { version = "1.1.0" }
 schemars = { version = "0.8.16" }
-serde = { version = "1.0.193", features = ["derive"] }
-serde_json = { version = "1.0.108" }
+seahash = { version ="4.1.0"}
+semver = { version = "1.0.21" }
+serde = { version = "1.0.196", features = ["derive"] }
+serde-wasm-bindgen = { version = "0.6.3" }
+serde_json = { version = "1.0.113" }
+serde_test = { version = "1.0.152" }
+serde_with = { version = "3.6.0", default-features = false, features = ["macros"] }
 shellexpand = { version = "3.0.0" }
-similar = { version = "2.3.0", features = ["inline"] }
-smallvec = { version = "1.11.2" }
+shlex = { version ="1.3.0"}
+similar = { version = "2.4.0", features = ["inline"] }
+smallvec = { version = "1.13.1" }
 static_assertions = "1.1.0"
 strum = { version = "0.25.0", features = ["strum_macros"] }
 strum_macros = { version = "0.25.3" }
 syn = { version = "2.0.40" }
+tempfile = { version ="3.9.0"}
 test-case = { version = "3.3.1" }
-thiserror = { version = "1.0.51" }
-toml = { version = "0.8.8" }
+thiserror = { version = "1.0.57" }
+tikv-jemallocator = { version ="0.5.0"}
+toml = { version = "0.8.9" }
 tracing = { version = "0.1.40" }
 tracing-indicatif = { version = "0.3.6" }
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
+typed-arena = { version = "2.0.2" }
+unic-ucd-category = { version ="0.9"}
 unicode-ident = { version = "1.0.12" }
-unicode_names2 = { version = "1.2.1" }
 unicode-width = { version = "0.1.11" }
+unicode_names2 = { version = "1.2.1" }
+ureq = { version = "2.9.1" }
+url = { version = "2.5.0" }
 uuid = { version = "1.6.1", features = ["v4", "fast-rng", "macro-diagnostics", "js"] }
-wsl = { version = "0.1.0" }
+walkdir = { version = "2.3.2" }
+wasm-bindgen = { version = "0.2.84" }
+wasm-bindgen-test = { version = "0.3.40" }
+wild = { version = "2" }
 
 [workspace.lints.rust]
 unsafe_code = "warn"

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: v0.1.9
+  rev: v0.2.1
   hooks:
     # Run the linter.
     - id: ruff
@@ -386,6 +386,7 @@ Ruff is used by a number of major open-source projects and companies, including:
 - Benchling ([Refac](https://github.com/benchling/refac))
 - [Bokeh](https://github.com/bokeh/bokeh)
 - [Cryptography (PyCA)](https://github.com/pyca/cryptography)
+- CERN ([Indico](https://getindico.io/))
 - [DVC](https://github.com/iterative/dvc)
 - [Dagger](https://github.com/dagger/dagger)
 - [Dagster](https://github.com/dagster-io/dagster)
@@ -401,6 +402,7 @@ Ruff is used by a number of major open-source projects and companies, including:
     [Diffusers](https://github.com/huggingface/diffusers))
 - ING Bank ([popmon](https://github.com/ing-bank/popmon), [probatus](https://github.com/ing-bank/probatus))
 - [Ibis](https://github.com/ibis-project/ibis)
+- [ivy](https://github.com/unifyai/ivy)
 - [Jupyter](https://github.com/jupyter-server/jupyter_server)
 - [LangChain](https://github.com/hwchase17/langchain)
 - [Litestar](https://litestar.dev/)
@@ -417,6 +419,7 @@ Ruff is used by a number of major open-source projects and companies, including:
 - Netflix ([Dispatch](https://github.com/Netflix/dispatch))
 - [Neon](https://github.com/neondatabase/neon)
 - [NoneBot](https://github.com/nonebot/nonebot2)
+- [NumPyro](https://github.com/pyro-ppl/numpyro)
 - [ONNX](https://github.com/onnx/onnx)
 - [OpenBB](https://github.com/OpenBB-finance/OpenBBTerminal)
 - [PDM](https://github.com/pdm-project/pdm)
@@ -428,10 +431,13 @@ Ruff is used by a number of major open-source projects and companies, including:
 - [PostHog](https://github.com/PostHog/posthog)
 - Prefect ([Python SDK](https://github.com/PrefectHQ/prefect), [Marvin](https://github.com/PrefectHQ/marvin))
 - [PyInstaller](https://github.com/pyinstaller/pyinstaller)
+- [PyMC](https://github.com/pymc-devs/pymc/)
 - [PyMC-Marketing](https://github.com/pymc-labs/pymc-marketing)
+- [pytest](https://github.com/pytest-dev/pytest)
 - [PyTorch](https://github.com/pytorch/pytorch)
 - [Pydantic](https://github.com/pydantic/pydantic)
 - [Pylint](https://github.com/PyCQA/pylint)
+- [PyVista](https://github.com/pyvista/pyvista)
 - [Reflex](https://github.com/reflex-dev/reflex)
 - [River](https://github.com/online-ml/river)
 - [Rippling](https://rippling.com)
@@ -458,7 +464,7 @@ Ruff is used by a number of major open-source projects and companies, including:
 
 ### Show Your Support
 
-If you're using Ruff, consider adding the Ruff badge to project's `README.md`:
+If you're using Ruff, consider adding the Ruff badge to your project's `README.md`:
 
 ```md
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
@@ -484,6 +490,6 @@ MIT
 
 <div align="center">
   <a target="_blank" href="https://astral.sh" style="background:none">
-    <img src="https://raw.githubusercontent.com/astral-sh/ruff/main/assets/svg/Astral.svg">
+    <img src="https://raw.githubusercontent.com/astral-sh/ruff/main/assets/svg/Astral.svg" alt="Made by Astral">
   </a>
 </div>

crates/flake8_to_ruff/Cargo.toml

@@ -1,39 +0,0 @@
-[package]
-name = "flake8-to-ruff"
-version = "0.1.9"
-description = """
-Convert Flake8 configuration files to Ruff configuration files.
-"""
-authors = { workspace = true }
-edition = { workspace = true }
-rust-version = { workspace = true }
-homepage = { workspace = true }
-documentation = { workspace = true }
-repository = { workspace = true }
-license = { workspace = true }
-
-[dependencies]
-ruff_linter = { path = "../ruff_linter", default-features = false }
-ruff_workspace = { path = "../ruff_workspace" }
-
-anyhow = { workspace = true }
-clap = { workspace = true }
-colored = { workspace = true }
-configparser = { version = "3.0.3" }
-itertools = { workspace = true }
-log = { workspace = true }
-once_cell = { workspace = true }
-pep440_rs = { version = "0.4.0", features = ["serde"] }
-regex = { workspace = true }
-rustc-hash = { workspace = true }
-serde = { workspace = true }
-serde_json = { workspace = true }
-strum = { workspace = true }
-strum_macros = { workspace = true }
-toml = { workspace = true }
-
-[dev-dependencies]
-pretty_assertions = "1.3.0"
-
-[lints]
-workspace = true

crates/flake8_to_ruff/README.md

@@ -1,99 +0,0 @@
-# flake8-to-ruff
-
-Convert existing Flake8 configuration files (`setup.cfg`, `tox.ini`, or `.flake8`) for use with
-[Ruff](https://github.com/astral-sh/ruff).
-
-Generates a Ruff-compatible `pyproject.toml` section.
-
-## Installation and Usage
-
-### Installation
-
-Available as [`flake8-to-ruff`](https://pypi.org/project/flake8-to-ruff/) on PyPI:
-
-```shell
-pip install flake8-to-ruff
-```
-
-### Usage
-
-To run `flake8-to-ruff`:
-
-```shell
-flake8-to-ruff path/to/setup.cfg
-flake8-to-ruff path/to/tox.ini
-flake8-to-ruff path/to/.flake8
-```
-
-`flake8-to-ruff` will print the relevant `pyproject.toml` sections to standard output, like so:
-
-```toml
-[tool.ruff]
-exclude = [
-    '.svn',
-    'CVS',
-    '.bzr',
-    '.hg',
-    '.git',
-    '__pycache__',
-    '.tox',
-    '.idea',
-    '.mypy_cache',
-    '.venv',
-    'node_modules',
-    '_state_machine.py',
-    'test_fstring.py',
-    'bad_coding2.py',
-    'badsyntax_*.py',
-]
-select = [
-    'A',
-    'E',
-    'F',
-    'Q',
-]
-ignore = []
-
-[tool.ruff.flake8-quotes]
-inline-quotes = 'single'
-
-[tool.ruff.pep8-naming]
-ignore-names = [
-    'foo',
-    'bar',
-]
-```
-
-### Plugins
-
-`flake8-to-ruff` will attempt to infer any activated plugins based on the settings provided in your
-configuration file.
-
-For example, if your `.flake8` file includes a `docstring-convention` property, `flake8-to-ruff`
-will enable the appropriate [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
-checks.
-
-Alternatively, you can manually specify plugins on the command-line:
-
-```shell
-flake8-to-ruff path/to/.flake8 --plugin flake8-builtins --plugin flake8-quotes
-```
-
-## Limitations
-
-1. Ruff only supports a subset of the Flake configuration options. `flake8-to-ruff` will warn on and
-    ignore unsupported options in the `.flake8` file (or equivalent). (Similarly, Ruff has a few
-    configuration options that don't exist in Flake8.)
-1. Ruff will omit any rule codes that are unimplemented or unsupported by Ruff, including rule
-    codes from unsupported plugins. (See the
-    [documentation](https://docs.astral.sh/ruff/faq/#how-does-ruff-compare-to-flake8) for the complete
-    list of supported plugins.)
-
-## License
-
-MIT
-
-## Contributing
-
-Contributions are welcome and hugely appreciated. To get started, check out the
-[contributing guidelines](https://github.com/astral-sh/ruff/blob/main/CONTRIBUTING.md).

crates/flake8_to_ruff/examples/cryptography/pyproject.toml

@@ -1,65 +0,0 @@
-[build-system]
-requires = [
-    # The minimum setuptools version is specific to the PEP 517 backend,
-    # and may be stricter than the version required in `setup.cfg`
-    "setuptools>=40.6.0,!=60.9.0",
-    "wheel",
-    # Must be kept in sync with the `install_requirements` in `setup.cfg`
-    "cffi>=1.12; platform_python_implementation != 'PyPy'",
-    "setuptools-rust>=0.11.4",
-]
-build-backend = "setuptools.build_meta"
-
-[tool.black]
-line-length = 79
-target-version = ["py36"]
-
-[tool.pytest.ini_options]
-addopts = "-r s --capture=no --strict-markers --benchmark-disable"
-markers = [
-    "skip_fips: this test is not executed in FIPS mode",
-    "supported: parametrized test requiring only_if and skip_message",
-]
-
-[tool.mypy]
-show_error_codes = true
-check_untyped_defs = true
-no_implicit_reexport = true
-warn_redundant_casts = true
-warn_unused_ignores = true
-warn_unused_configs = true
-strict_equality = true
-
-[[tool.mypy.overrides]]
-module = [
-    "pretend"
-]
-ignore_missing_imports = true
-
-[tool.coverage.run]
-branch = true
-relative_files = true
-source = [
-    "cryptography",
-    "tests/",
-]
-
-[tool.coverage.paths]
-source = [
-   "src/cryptography",
-   "*.tox/*/lib*/python*/site-packages/cryptography",
-   "*.tox\\*\\Lib\\site-packages\\cryptography",
-   "*.tox/pypy/site-packages/cryptography",
-]
-tests =[
-   "tests/",
-   "*tests\\",
-]
-
-[tool.coverage.report]
-exclude_lines = [
-    "@abc.abstractmethod",
-    "@abc.abstractproperty",
-    "@typing.overload",
-    "if typing.TYPE_CHECKING",
-]

crates/flake8_to_ruff/examples/cryptography/setup.cfg

@@ -1,91 +0,0 @@
-[metadata]
-name = cryptography
-version = attr: cryptography.__version__
-description = cryptography is a package which provides cryptographic recipes and primitives to Python developers.
-long_description = file: README.rst
-long_description_content_type = text/x-rst
-license = BSD-3-Clause OR Apache-2.0
-url = https://github.com/pyca/cryptography
-author = The Python Cryptographic Authority and individual contributors
-author_email = cryptography-dev@python.org
-project_urls =
-    Documentation=https://cryptography.io/
-    Source=https://github.com/pyca/cryptography/
-    Issues=https://github.com/pyca/cryptography/issues
-    Changelog=https://cryptography.io/en/latest/changelog/
-classifiers =
-    Development Status :: 5 - Production/Stable
-    Intended Audience :: Developers
-    License :: OSI Approved :: Apache Software License
-    License :: OSI Approved :: BSD License
-    Natural Language :: English
-    Operating System :: MacOS :: MacOS X
-    Operating System :: POSIX
-    Operating System :: POSIX :: BSD
-    Operating System :: POSIX :: Linux
-    Operating System :: Microsoft :: Windows
-    Programming Language :: Python
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.6
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Programming Language :: Python :: Implementation :: CPython
-    Programming Language :: Python :: Implementation :: PyPy
-    Topic :: Security :: Cryptography
-
-[options]
-python_requires = >=3.6
-include_package_data = True
-zip_safe = False
-package_dir =
-    =src
-packages = find:
-# `install_requires` must be kept in sync with `pyproject.toml`
-install_requires =
-    cffi >=1.12
-
-[options.packages.find]
-where = src
-exclude =
-    _cffi_src
-    _cffi_src.*
-
-[options.extras_require]
-test =
-    pytest>=6.2.0
-    pytest-benchmark
-    pytest-cov
-    pytest-subtests
-    pytest-xdist
-    pretend
-    iso8601
-    pytz
-    hypothesis>=1.11.4,!=3.79.2
-docs =
-    sphinx >= 1.6.5,!=1.8.0,!=3.1.0,!=3.1.1,!=5.2.0,!=5.2.0.post0
-    sphinx_rtd_theme
-docstest =
-    pyenchant >= 1.6.11
-    twine >= 1.12.0
-    sphinxcontrib-spelling >= 4.0.1
-sdist =
-    setuptools_rust >= 0.11.4
-pep8test =
-    black
-    flake8
-    flake8-import-order
-    pep8-naming
-# This extra is for OpenSSH private keys that use bcrypt KDF
-# Versions: v3.1.3 - ignore_few_rounds, v3.1.5 - abi3
-ssh =
-    bcrypt >= 3.1.5
-
-[flake8]
-ignore = E203,E211,W503,W504,N818
-exclude = .tox,*.egg,.git,_build,.hypothesis
-select = E,W,F,N,I
-application-import-names = cryptography,cryptography_vectors,tests

crates/flake8_to_ruff/examples/jupyterhub.ini

@@ -1,19 +0,0 @@
-[flake8]
-# Ignore style and complexity
-# E: style errors
-# W: style warnings
-# C: complexity
-# D: docstring warnings (unused pydocstyle extension)
-# F841: local variable assigned but never used
-ignore = E, C, W, D, F841
-builtins = c, get_config
-exclude =
-    .cache,
-    .github,
-    docs,
-    jupyterhub/alembic*,
-    onbuild,
-    scripts,
-    share,
-    tools,
-    setup.py

crates/flake8_to_ruff/examples/manim.ini

@@ -1,43 +0,0 @@
-[flake8]
-# Exclude the grpc generated code
-exclude = ./manim/grpc/gen/*
-max-complexity = 15
-max-line-length = 88
-statistics = True
-# Prevents some flake8-rst-docstrings errors
-rst-roles = attr,class,func,meth,mod,obj,ref,doc,exc
-rst-directives = manim, SEEALSO, seealso
-docstring-convention=numpy
-
-select = A,A00,B,B9,C4,C90,D,E,F,F,PT,RST,SIM,W
-
-                # General Compatibility
-extend-ignore = E203, W503, D202, D212, D213, D404
-
-                # Misc
-                F401, F403, F405, F841, E501, E731, E402, F811, F821,
-
-                # Plug-in: flake8-builtins
-                A001, A002, A003,
-
-                # Plug-in: flake8-bugbear
-                B006, B007, B008, B009, B010, B903, B950,
-
-                # Plug-in: flake8-simplify
-                SIM105, SIM106, SIM119,
-
-                # Plug-in: flake8-comprehensions
-                C901
-
-                # Plug-in: flake8-pytest-style
-                PT001, PT004, PT006, PT011, PT018, PT022, PT023,
-
-                # Plug-in: flake8-docstrings
-                D100, D101, D102, D103, D104, D105, D106, D107,
-                D200, D202, D204, D205, D209,
-                D301,
-                D400, D401, D402, D403, D405, D406, D407, D409, D411, D412, D414,
-
-                # Plug-in: flake8-rst-docstrings
-                RST201, RST203, RST210, RST212, RST213, RST215,
-                RST301, RST303,

crates/flake8_to_ruff/examples/poetry.ini

@@ -1,36 +0,0 @@
-[flake8]
-min_python_version = 3.7.0
-max-line-length = 88
-ban-relative-imports = true
-# flake8-use-fstring: https://github.com/MichaelKim0407/flake8-use-fstring#--percent-greedy-and---format-greedy
-format-greedy = 1
-inline-quotes = double
-enable-extensions = TC, TC1
-type-checking-strict = true
-eradicate-whitelist-extend = ^-.*;
-extend-ignore =
-    # E203: Whitespace before ':' (pycqa/pycodestyle#373)
-    E203,
-    # SIM106: Handle error-cases first
-    SIM106,
-    # ANN101: Missing type annotation for self in method
-    ANN101,
-    # ANN102: Missing type annotation for cls in classmethod
-    ANN102,
-    # PIE781: assign-and-return
-    PIE781,
-    # PIE798 no-unnecessary-class: Consider using a module for namespacing instead
-    PIE798,
-per-file-ignores =
-    # TC002: Move third-party import '...' into a type-checking block
-    __init__.py:TC002,
-    # ANN201: Missing return type annotation for public function
-    tests/test_*:ANN201
-    tests/**/test_*:ANN201
-extend-exclude =
-    # Frozen and not subject to change in this repo:
-    get-poetry.py,
-    install-poetry.py,
-    # External to the project's coding standards:
-    tests/fixtures/*,
-    tests/**/fixtures/*,

crates/flake8_to_ruff/examples/python-discord.ini

@@ -1,19 +0,0 @@
-[flake8]
-max-line-length=120
-docstring-convention=all
-import-order-style=pycharm
-application_import_names=bot,tests
-exclude=.cache,.venv,.git,constants.py
-extend-ignore=
-    B311,W503,E226,S311,T000,E731
-    # Missing Docstrings
-    D100,D104,D105,D107,
-    # Docstring Whitespace
-    D203,D212,D214,D215,
-    # Docstring Quotes
-    D301,D302,
-    # Docstring Content
-    D400,D401,D402,D404,D405,D406,D407,D408,D409,D410,D411,D412,D413,D414,D416,D417
-    # Type Annotations
-    ANN002,ANN003,ANN101,ANN102,ANN204,ANN206,ANN401
-per-file-ignores=tests/*:D,ANN

crates/flake8_to_ruff/examples/requests.ini

@@ -1,6 +0,0 @@
-[flake8]
-ignore = E203, E501, W503
-per-file-ignores =
-    requests/__init__.py:E402, F401
-    requests/compat.py:E402, F401
-    tests/compat.py:F401

crates/flake8_to_ruff/pyproject.toml

@@ -1,34 +0,0 @@
-[project]
-name = "flake8-to-ruff"
-keywords = ["automation", "flake8", "pycodestyle", "pyflakes", "pylint", "clippy"]
-classifiers = [
-    "Development Status :: 3 - Alpha",
-    "Environment :: Console",
-    "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
-    "Operating System :: OS Independent",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3 :: Only",
-    "Topic :: Software Development :: Libraries :: Python Modules",
-    "Topic :: Software Development :: Quality Assurance",
-]
-author = "Charlie Marsh"
-author_email = "charlie.r.marsh@gmail.com"
-description = "Convert existing Flake8 configuration to Ruff."
-requires-python = ">=3.7"
-
-[project.urls]
-repository = "https://github.com/astral-sh/ruff#subdirectory=crates/flake8_to_ruff"
-
-[build-system]
-requires = ["maturin>=1.0,<2.0"]
-build-backend = "maturin"
-
-[tool.maturin]
-bindings = "bin"
-strip = true

crates/flake8_to_ruff/src/black.rs

@@ -1,13 +0,0 @@
-//! Extract Black configuration settings from a pyproject.toml.
-
-use ruff_linter::line_width::LineLength;
-use ruff_linter::settings::types::PythonVersion;
-use serde::{Deserialize, Serialize};
-
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
-pub(crate) struct Black {
-    #[serde(alias = "line-length", alias = "line_length")]
-    pub(crate) line_length: Option<LineLength>,
-    #[serde(alias = "target-version", alias = "target_version")]
-    pub(crate) target_version: Option<Vec<PythonVersion>>,
-}

crates/flake8_to_ruff/src/converter.rs

@@ -1,687 +0,0 @@
-use std::collections::{HashMap, HashSet};
-use std::str::FromStr;
-
-use itertools::Itertools;
-
-use ruff_linter::line_width::LineLength;
-use ruff_linter::registry::Linter;
-use ruff_linter::rule_selector::RuleSelector;
-use ruff_linter::rules::flake8_pytest_style::types::{
-    ParametrizeNameType, ParametrizeValuesRowType, ParametrizeValuesType,
-};
-use ruff_linter::rules::flake8_quotes::settings::Quote;
-use ruff_linter::rules::flake8_tidy_imports::settings::Strictness;
-use ruff_linter::rules::pydocstyle::settings::Convention;
-use ruff_linter::settings::types::PythonVersion;
-use ruff_linter::settings::DEFAULT_SELECTORS;
-use ruff_linter::warn_user;
-use ruff_workspace::options::{
-    Flake8AnnotationsOptions, Flake8BugbearOptions, Flake8BuiltinsOptions, Flake8ErrMsgOptions,
-    Flake8PytestStyleOptions, Flake8QuotesOptions, Flake8TidyImportsOptions, LintCommonOptions,
-    LintOptions, McCabeOptions, Options, Pep8NamingOptions, PydocstyleOptions,
-};
-use ruff_workspace::pyproject::Pyproject;
-
-use super::external_config::ExternalConfig;
-use super::plugin::Plugin;
-use super::{parser, plugin};
-
-pub(crate) fn convert(
-    config: &HashMap<String, HashMap<String, Option<String>>>,
-    external_config: &ExternalConfig,
-    plugins: Option<Vec<Plugin>>,
-) -> Pyproject {
-    // Extract the Flake8 section.
-    let flake8 = config
-        .get("flake8")
-        .expect("Unable to find flake8 section in INI file");
-
-    // Extract all referenced rule code prefixes, to power plugin inference.
-    let mut referenced_codes: HashSet<RuleSelector> = HashSet::default();
-    for (key, value) in flake8 {
-        if let Some(value) = value {
-            match key.as_str() {
-                "select" | "ignore" | "extend-select" | "extend_select" | "extend-ignore"
-                | "extend_ignore" => {
-                    referenced_codes.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "per-file-ignores" | "per_file_ignores" => {
-                    if let Ok(per_file_ignores) =
-                        parser::parse_files_to_codes_mapping(value.as_ref())
-                    {
-                        for (_, codes) in parser::collect_per_file_ignores(per_file_ignores) {
-                            referenced_codes.extend(codes);
-                        }
-                    }
-                }
-                _ => {}
-            }
-        }
-    }
-
-    // Infer plugins, if not provided.
-    let plugins = plugins.unwrap_or_else(|| {
-        let from_options = plugin::infer_plugins_from_options(flake8);
-        if !from_options.is_empty() {
-            #[allow(clippy::print_stderr)]
-            {
-                eprintln!("Inferred plugins from settings: {from_options:#?}");
-            }
-        }
-        let from_codes = plugin::infer_plugins_from_codes(&referenced_codes);
-        if !from_codes.is_empty() {
-            #[allow(clippy::print_stderr)]
-            {
-                eprintln!("Inferred plugins from referenced codes: {from_codes:#?}");
-            }
-        }
-        from_options.into_iter().chain(from_codes).collect()
-    });
-
-    // Check if the user has specified a `select`. If not, we'll add our own
-    // default `select`, and populate it based on user plugins.
-    let mut select = flake8
-        .get("select")
-        .and_then(|value| {
-            value
-                .as_ref()
-                .map(|value| HashSet::from_iter(parser::parse_prefix_codes(value)))
-        })
-        .unwrap_or_else(|| resolve_select(&plugins));
-    let mut ignore: HashSet<RuleSelector> = flake8
-        .get("ignore")
-        .and_then(|value| {
-            value
-                .as_ref()
-                .map(|value| HashSet::from_iter(parser::parse_prefix_codes(value)))
-        })
-        .unwrap_or_default();
-
-    // Parse each supported option.
-    let mut options = Options::default();
-    let mut lint_options = LintCommonOptions::default();
-    let mut flake8_annotations = Flake8AnnotationsOptions::default();
-    let mut flake8_bugbear = Flake8BugbearOptions::default();
-    let mut flake8_builtins = Flake8BuiltinsOptions::default();
-    let mut flake8_errmsg = Flake8ErrMsgOptions::default();
-    let mut flake8_pytest_style = Flake8PytestStyleOptions::default();
-    let mut flake8_quotes = Flake8QuotesOptions::default();
-    let mut flake8_tidy_imports = Flake8TidyImportsOptions::default();
-    let mut mccabe = McCabeOptions::default();
-    let mut pep8_naming = Pep8NamingOptions::default();
-    let mut pydocstyle = PydocstyleOptions::default();
-    for (key, value) in flake8 {
-        if let Some(value) = value {
-            match key.as_str() {
-                // flake8
-                "builtins" => {
-                    options.builtins = Some(parser::parse_strings(value.as_ref()));
-                }
-                "max-line-length" | "max_line_length" => match LineLength::from_str(value) {
-                    Ok(line_length) => options.line_length = Some(line_length),
-                    Err(e) => {
-                        warn_user!("Unable to parse '{key}' property: {e}");
-                    }
-                },
-                "select" => {
-                    // No-op (handled above).
-                    select.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "ignore" => {
-                    // No-op (handled above).
-                }
-                "extend-select" | "extend_select" => {
-                    // Unlike Flake8, use a single explicit `select`.
-                    select.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "extend-ignore" | "extend_ignore" => {
-                    // Unlike Flake8, use a single explicit `ignore`.
-                    ignore.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "exclude" => {
-                    options.exclude = Some(parser::parse_strings(value.as_ref()));
-                }
-                "extend-exclude" | "extend_exclude" => {
-                    options.extend_exclude = Some(parser::parse_strings(value.as_ref()));
-                }
-                "per-file-ignores" | "per_file_ignores" => {
-                    match parser::parse_files_to_codes_mapping(value.as_ref()) {
-                        Ok(per_file_ignores) => {
-                            lint_options.per_file_ignores =
-                                Some(parser::collect_per_file_ignores(per_file_ignores));
-                        }
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                // flake8-bugbear
-                "extend-immutable-calls" | "extend_immutable_calls" => {
-                    flake8_bugbear.extend_immutable_calls =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                // flake8-builtins
-                "builtins-ignorelist" | "builtins_ignorelist" => {
-                    flake8_builtins.builtins_ignorelist =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                // flake8-annotations
-                "suppress-none-returning" | "suppress_none_returning" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.suppress_none_returning = Some(bool),
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                "suppress-dummy-args" | "suppress_dummy_args" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.suppress_dummy_args = Some(bool),
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                "mypy-init-return" | "mypy_init_return" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.mypy_init_return = Some(bool),
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                "allow-star-arg-any" | "allow_star_arg_any" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.allow_star_arg_any = Some(bool),
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                // flake8-quotes
-                "quotes" | "inline-quotes" | "inline_quotes" => match value.trim() {
-                    "'" | "single" => flake8_quotes.inline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Double),
-                    _ => {
-                        warn_user!("Unexpected '{key}' value: {value}");
-                    }
-                },
-                "multiline-quotes" | "multiline_quotes" => match value.trim() {
-                    "'" | "single" => flake8_quotes.multiline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Double),
-                    _ => {
-                        warn_user!("Unexpected '{key}' value: {value}");
-                    }
-                },
-                "docstring-quotes" | "docstring_quotes" => match value.trim() {
-                    "'" | "single" => flake8_quotes.docstring_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Double),
-                    _ => {
-                        warn_user!("Unexpected '{key}' value: {value}");
-                    }
-                },
-                "avoid-escape" | "avoid_escape" => match parser::parse_bool(value.as_ref()) {
-                    Ok(bool) => flake8_quotes.avoid_escape = Some(bool),
-                    Err(e) => {
-                        warn_user!("Unable to parse '{key}' property: {e}");
-                    }
-                },
-                // pep8-naming
-                "ignore-names" | "ignore_names" => {
-                    pep8_naming.ignore_names = Some(parser::parse_strings(value.as_ref()));
-                }
-                "classmethod-decorators" | "classmethod_decorators" => {
-                    pep8_naming.classmethod_decorators =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                "staticmethod-decorators" | "staticmethod_decorators" => {
-                    pep8_naming.staticmethod_decorators =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                // flake8-tidy-imports
-                "ban-relative-imports" | "ban_relative_imports" => match value.trim() {
-                    "true" => flake8_tidy_imports.ban_relative_imports = Some(Strictness::All),
-                    "parents" => {
-                        flake8_tidy_imports.ban_relative_imports = Some(Strictness::Parents);
-                    }
-                    _ => {
-                        warn_user!("Unexpected '{key}' value: {value}");
-                    }
-                },
-                // flake8-docstrings
-                "docstring-convention" => match value.trim() {
-                    "google" => pydocstyle.convention = Some(Convention::Google),
-                    "numpy" => pydocstyle.convention = Some(Convention::Numpy),
-                    "pep257" => pydocstyle.convention = Some(Convention::Pep257),
-                    "all" => pydocstyle.convention = None,
-                    _ => {
-                        warn_user!("Unexpected '{key}' value: {value}");
-                    }
-                },
-                // mccabe
-                "max-complexity" | "max_complexity" => match value.parse::<usize>() {
-                    Ok(max_complexity) => mccabe.max_complexity = Some(max_complexity),
-                    Err(e) => {
-                        warn_user!("Unable to parse '{key}' property: {e}");
-                    }
-                },
-                // flake8-errmsg
-                "errmsg-max-string-length" | "errmsg_max_string_length" => {
-                    match value.parse::<usize>() {
-                        Ok(max_string_length) => {
-                            flake8_errmsg.max_string_length = Some(max_string_length);
-                        }
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                // flake8-pytest-style
-                "pytest-fixture-no-parentheses" | "pytest_fixture_no_parentheses " => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_pytest_style.fixture_parentheses = Some(!bool),
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                "pytest-parametrize-names-type" | "pytest_parametrize_names_type" => {
-                    match value.trim() {
-                        "csv" => {
-                            flake8_pytest_style.parametrize_names_type =
-                                Some(ParametrizeNameType::Csv);
-                        }
-                        "tuple" => {
-                            flake8_pytest_style.parametrize_names_type =
-                                Some(ParametrizeNameType::Tuple);
-                        }
-                        "list" => {
-                            flake8_pytest_style.parametrize_names_type =
-                                Some(ParametrizeNameType::List);
-                        }
-                        _ => {
-                            warn_user!("Unexpected '{key}' value: {value}");
-                        }
-                    }
-                }
-                "pytest-parametrize-values-type" | "pytest_parametrize_values_type" => {
-                    match value.trim() {
-                        "tuple" => {
-                            flake8_pytest_style.parametrize_values_type =
-                                Some(ParametrizeValuesType::Tuple);
-                        }
-                        "list" => {
-                            flake8_pytest_style.parametrize_values_type =
-                                Some(ParametrizeValuesType::List);
-                        }
-                        _ => {
-                            warn_user!("Unexpected '{key}' value: {value}");
-                        }
-                    }
-                }
-                "pytest-parametrize-values-row-type" | "pytest_parametrize_values_row_type" => {
-                    match value.trim() {
-                        "tuple" => {
-                            flake8_pytest_style.parametrize_values_row_type =
-                                Some(ParametrizeValuesRowType::Tuple);
-                        }
-                        "list" => {
-                            flake8_pytest_style.parametrize_values_row_type =
-                                Some(ParametrizeValuesRowType::List);
-                        }
-                        _ => {
-                            warn_user!("Unexpected '{key}' value: {value}");
-                        }
-                    }
-                }
-                "pytest-raises-require-match-for" | "pytest_raises_require_match_for" => {
-                    flake8_pytest_style.raises_require_match_for =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                "pytest-mark-no-parentheses" | "pytest_mark_no_parentheses" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_pytest_style.mark_parentheses = Some(!bool),
-                        Err(e) => {
-                            warn_user!("Unable to parse '{key}' property: {e}");
-                        }
-                    }
-                }
-                // Unknown
-                _ => {
-                    warn_user!("Skipping unsupported property: {}", key);
-                }
-            }
-        }
-    }
-
-    // Deduplicate and sort.
-    lint_options.select = Some(
-        select
-            .into_iter()
-            .sorted_by_key(RuleSelector::prefix_and_code)
-            .collect(),
-    );
-    lint_options.ignore = Some(
-        ignore
-            .into_iter()
-            .sorted_by_key(RuleSelector::prefix_and_code)
-            .collect(),
-    );
-    if flake8_annotations != Flake8AnnotationsOptions::default() {
-        lint_options.flake8_annotations = Some(flake8_annotations);
-    }
-    if flake8_bugbear != Flake8BugbearOptions::default() {
-        lint_options.flake8_bugbear = Some(flake8_bugbear);
-    }
-    if flake8_builtins != Flake8BuiltinsOptions::default() {
-        lint_options.flake8_builtins = Some(flake8_builtins);
-    }
-    if flake8_errmsg != Flake8ErrMsgOptions::default() {
-        lint_options.flake8_errmsg = Some(flake8_errmsg);
-    }
-    if flake8_pytest_style != Flake8PytestStyleOptions::default() {
-        lint_options.flake8_pytest_style = Some(flake8_pytest_style);
-    }
-    if flake8_quotes != Flake8QuotesOptions::default() {
-        lint_options.flake8_quotes = Some(flake8_quotes);
-    }
-    if flake8_tidy_imports != Flake8TidyImportsOptions::default() {
-        lint_options.flake8_tidy_imports = Some(flake8_tidy_imports);
-    }
-    if mccabe != McCabeOptions::default() {
-        lint_options.mccabe = Some(mccabe);
-    }
-    if pep8_naming != Pep8NamingOptions::default() {
-        lint_options.pep8_naming = Some(pep8_naming);
-    }
-    if pydocstyle != PydocstyleOptions::default() {
-        lint_options.pydocstyle = Some(pydocstyle);
-    }
-
-    // Extract any settings from the existing `pyproject.toml`.
-    if let Some(black) = &external_config.black {
-        if let Some(line_length) = &black.line_length {
-            options.line_length = Some(*line_length);
-        }
-
-        if let Some(target_version) = &black.target_version {
-            if let Some(target_version) = target_version.iter().min() {
-                options.target_version = Some(*target_version);
-            }
-        }
-    }
-
-    if let Some(isort) = &external_config.isort {
-        if let Some(src_paths) = &isort.src_paths {
-            match options.src.as_mut() {
-                Some(src) => {
-                    src.extend_from_slice(src_paths);
-                }
-                None => {
-                    options.src = Some(src_paths.clone());
-                }
-            }
-        }
-    }
-
-    if let Some(project) = &external_config.project {
-        if let Some(requires_python) = &project.requires_python {
-            if options.target_version.is_none() {
-                options.target_version =
-                    PythonVersion::get_minimum_supported_version(requires_python);
-            }
-        }
-    }
-
-    if lint_options != LintCommonOptions::default() {
-        options.lint = Some(LintOptions {
-            common: lint_options,
-            ..LintOptions::default()
-        });
-    }
-
-    // Create the pyproject.toml.
-    Pyproject::new(options)
-}
-
-/// Resolve the set of enabled `RuleSelector` values for the given
-/// plugins.
-fn resolve_select(plugins: &[Plugin]) -> HashSet<RuleSelector> {
-    let mut select: HashSet<_> = DEFAULT_SELECTORS.iter().cloned().collect();
-    select.extend(plugins.iter().map(|p| Linter::from(p).into()));
-    select
-}
-
-#[cfg(test)]
-mod tests {
-    use std::collections::HashMap;
-    use std::str::FromStr;
-
-    use anyhow::Result;
-    use itertools::Itertools;
-    use pep440_rs::VersionSpecifiers;
-
-    use pretty_assertions::assert_eq;
-    use ruff_linter::line_width::LineLength;
-    use ruff_linter::registry::Linter;
-    use ruff_linter::rule_selector::RuleSelector;
-    use ruff_linter::rules::flake8_quotes;
-    use ruff_linter::rules::pydocstyle::settings::Convention;
-    use ruff_linter::settings::types::PythonVersion;
-    use ruff_workspace::options::{
-        Flake8QuotesOptions, LintCommonOptions, LintOptions, Options, PydocstyleOptions,
-    };
-    use ruff_workspace::pyproject::Pyproject;
-
-    use crate::converter::DEFAULT_SELECTORS;
-    use crate::pep621::Project;
-    use crate::ExternalConfig;
-
-    use super::super::plugin::Plugin;
-    use super::convert;
-
-    fn lint_default_options(plugins: impl IntoIterator<Item = RuleSelector>) -> LintCommonOptions {
-        LintCommonOptions {
-            ignore: Some(vec![]),
-            select: Some(
-                DEFAULT_SELECTORS
-                    .iter()
-                    .cloned()
-                    .chain(plugins)
-                    .sorted_by_key(RuleSelector::prefix_and_code)
-                    .collect(),
-            ),
-            ..LintCommonOptions::default()
-        }
-    }
-
-    #[test]
-    fn it_converts_empty() {
-        let actual = convert(
-            &HashMap::from([("flake8".to_string(), HashMap::default())]),
-            &ExternalConfig::default(),
-            None,
-        );
-        let expected = Pyproject::new(Options {
-            lint: Some(LintOptions {
-                common: lint_default_options([]),
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_converts_dashes() {
-        let actual = convert(
-            &HashMap::from([(
-                "flake8".to_string(),
-                HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
-            )]),
-            &ExternalConfig::default(),
-            Some(vec![]),
-        );
-        let expected = Pyproject::new(Options {
-            line_length: Some(LineLength::try_from(100).unwrap()),
-            lint: Some(LintOptions {
-                common: lint_default_options([]),
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_converts_underscores() {
-        let actual = convert(
-            &HashMap::from([(
-                "flake8".to_string(),
-                HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
-            )]),
-            &ExternalConfig::default(),
-            Some(vec![]),
-        );
-        let expected = Pyproject::new(Options {
-            line_length: Some(LineLength::try_from(100).unwrap()),
-            lint: Some(LintOptions {
-                common: lint_default_options([]),
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_ignores_parse_errors() {
-        let actual = convert(
-            &HashMap::from([(
-                "flake8".to_string(),
-                HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
-            )]),
-            &ExternalConfig::default(),
-            Some(vec![]),
-        );
-        let expected = Pyproject::new(Options {
-            lint: Some(LintOptions {
-                common: lint_default_options([]),
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_converts_plugin_options() {
-        let actual = convert(
-            &HashMap::from([(
-                "flake8".to_string(),
-                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
-            )]),
-            &ExternalConfig::default(),
-            Some(vec![]),
-        );
-        let expected = Pyproject::new(Options {
-            lint: Some(LintOptions {
-                common: LintCommonOptions {
-                    flake8_quotes: Some(Flake8QuotesOptions {
-                        inline_quotes: Some(flake8_quotes::settings::Quote::Single),
-                        multiline_quotes: None,
-                        docstring_quotes: None,
-                        avoid_escape: None,
-                    }),
-                    ..lint_default_options([])
-                },
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_converts_docstring_conventions() {
-        let actual = convert(
-            &HashMap::from([(
-                "flake8".to_string(),
-                HashMap::from([(
-                    "docstring-convention".to_string(),
-                    Some("numpy".to_string()),
-                )]),
-            )]),
-            &ExternalConfig::default(),
-            Some(vec![Plugin::Flake8Docstrings]),
-        );
-        let expected = Pyproject::new(Options {
-            lint: Some(LintOptions {
-                common: LintCommonOptions {
-                    pydocstyle: Some(PydocstyleOptions {
-                        convention: Some(Convention::Numpy),
-                        ignore_decorators: None,
-                        property_decorators: None,
-                    }),
-                    ..lint_default_options([Linter::Pydocstyle.into()])
-                },
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_infers_plugins_if_omitted() {
-        let actual = convert(
-            &HashMap::from([(
-                "flake8".to_string(),
-                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
-            )]),
-            &ExternalConfig::default(),
-            None,
-        );
-        let expected = Pyproject::new(Options {
-            lint: Some(LintOptions {
-                common: LintCommonOptions {
-                    flake8_quotes: Some(Flake8QuotesOptions {
-                        inline_quotes: Some(flake8_quotes::settings::Quote::Single),
-                        multiline_quotes: None,
-                        docstring_quotes: None,
-                        avoid_escape: None,
-                    }),
-                    ..lint_default_options([Linter::Flake8Quotes.into()])
-                },
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_converts_project_requires_python() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([("flake8".to_string(), HashMap::default())]),
-            &ExternalConfig {
-                project: Some(&Project {
-                    requires_python: Some(VersionSpecifiers::from_str(">=3.8.16, <3.11")?),
-                }),
-                ..ExternalConfig::default()
-            },
-            Some(vec![]),
-        );
-        let expected = Pyproject::new(Options {
-            target_version: Some(PythonVersion::Py38),
-            lint: Some(LintOptions {
-                common: lint_default_options([]),
-                ..LintOptions::default()
-            }),
-            ..Options::default()
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-}

crates/flake8_to_ruff/src/external_config.rs

@@ -1,10 +0,0 @@
-use super::black::Black;
-use super::isort::Isort;
-use super::pep621::Project;
-
-#[derive(Default)]
-pub(crate) struct ExternalConfig<'a> {
-    pub(crate) black: Option<&'a Black>,
-    pub(crate) isort: Option<&'a Isort>,
-    pub(crate) project: Option<&'a Project>,
-}

crates/flake8_to_ruff/src/isort.rs

@@ -1,10 +0,0 @@
-//! Extract isort configuration settings from a pyproject.toml.
-
-use serde::{Deserialize, Serialize};
-
-/// The [isort configuration](https://pycqa.github.io/isort/docs/configuration/config_files.html).
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
-pub(crate) struct Isort {
-    #[serde(alias = "src-paths", alias = "src_paths")]
-    pub(crate) src_paths: Option<Vec<String>>,
-}

crates/flake8_to_ruff/src/main.rs

@@ -1,80 +0,0 @@
-//! Utility to generate Ruff's `pyproject.toml` section from a Flake8 INI file.
-
-mod black;
-mod converter;
-mod external_config;
-mod isort;
-mod parser;
-mod pep621;
-mod plugin;
-mod pyproject;
-
-use std::path::PathBuf;
-
-use anyhow::Result;
-use clap::Parser;
-use configparser::ini::Ini;
-
-use crate::converter::convert;
-use crate::external_config::ExternalConfig;
-use crate::plugin::Plugin;
-use crate::pyproject::parse;
-use ruff_linter::logging::{set_up_logging, LogLevel};
-
-#[derive(Parser)]
-#[command(
-    about = "Convert existing Flake8 configuration to Ruff.",
-    long_about = None
-)]
-struct Args {
-    /// Path to the Flake8 configuration file (e.g., `setup.cfg`, `tox.ini`, or
-    /// `.flake8`).
-    #[arg(required = true)]
-    file: PathBuf,
-    /// Optional path to a `pyproject.toml` file, used to ensure compatibility
-    /// with Black.
-    #[arg(long)]
-    pyproject: Option<PathBuf>,
-    /// List of plugins to enable.
-    #[arg(long, value_delimiter = ',')]
-    plugin: Option<Vec<Plugin>>,
-}
-
-fn main() -> Result<()> {
-    set_up_logging(&LogLevel::Default)?;
-
-    let args = Args::parse();
-
-    // Read the INI file.
-    let mut ini = Ini::new_cs();
-    ini.set_multiline(true);
-    let config = ini.load(args.file).map_err(|msg| anyhow::anyhow!(msg))?;
-
-    // Read the pyproject.toml file.
-    let pyproject = args.pyproject.map(parse).transpose()?;
-    let external_config = pyproject
-        .as_ref()
-        .and_then(|pyproject| pyproject.tool.as_ref())
-        .map(|tool| ExternalConfig {
-            black: tool.black.as_ref(),
-            isort: tool.isort.as_ref(),
-            ..Default::default()
-        })
-        .unwrap_or_default();
-    let external_config = ExternalConfig {
-        project: pyproject
-            .as_ref()
-            .and_then(|pyproject| pyproject.project.as_ref()),
-        ..external_config
-    };
-
-    // Create Ruff's pyproject.toml section.
-    let pyproject = convert(&config, &external_config, args.plugin);
-
-    #[allow(clippy::print_stdout)]
-    {
-        println!("{}", toml::to_string_pretty(&pyproject)?);
-    }
-
-    Ok(())
-}

crates/flake8_to_ruff/src/parser.rs

@@ -1,391 +0,0 @@
-use std::str::FromStr;
-
-use anyhow::{bail, Result};
-use once_cell::sync::Lazy;
-use regex::Regex;
-use rustc_hash::FxHashMap;
-
-use ruff_linter::settings::types::PatternPrefixPair;
-use ruff_linter::{warn_user, RuleSelector};
-
-static COMMA_SEPARATED_LIST_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"[,\s]").unwrap());
-
-/// Parse a comma-separated list of `RuleSelector` values (e.g.,
-/// "F401,E501").
-pub(crate) fn parse_prefix_codes(value: &str) -> Vec<RuleSelector> {
-    let mut codes: Vec<RuleSelector> = vec![];
-    for code in COMMA_SEPARATED_LIST_RE.split(value) {
-        let code = code.trim();
-        if code.is_empty() {
-            continue;
-        }
-        if let Ok(code) = RuleSelector::from_str(code) {
-            codes.push(code);
-        } else {
-            warn_user!("Unsupported prefix code: {code}");
-        }
-    }
-    codes
-}
-
-/// Parse a comma-separated list of strings (e.g., "__init__.py,__main__.py").
-pub(crate) fn parse_strings(value: &str) -> Vec<String> {
-    COMMA_SEPARATED_LIST_RE
-        .split(value)
-        .map(str::trim)
-        .filter(|part| !part.is_empty())
-        .map(String::from)
-        .collect()
-}
-
-/// Parse a boolean.
-pub(crate) fn parse_bool(value: &str) -> Result<bool> {
-    match value.trim() {
-        "true" => Ok(true),
-        "false" => Ok(false),
-        _ => bail!("Unexpected boolean value: {value}"),
-    }
-}
-
-#[derive(Debug)]
-struct Token {
-    token_name: TokenType,
-    src: String,
-}
-
-#[derive(Debug, Copy, Clone)]
-enum TokenType {
-    Code,
-    File,
-    Colon,
-    Comma,
-    Ws,
-    Eof,
-}
-
-struct State {
-    seen_sep: bool,
-    seen_colon: bool,
-    filenames: Vec<String>,
-    codes: Vec<String>,
-}
-
-impl State {
-    const fn new() -> Self {
-        Self {
-            seen_sep: true,
-            seen_colon: false,
-            filenames: vec![],
-            codes: vec![],
-        }
-    }
-
-    /// Generate the list of `StrRuleCodePair` pairs for the current
-    /// state.
-    fn parse(&self) -> Vec<PatternPrefixPair> {
-        let mut codes: Vec<PatternPrefixPair> = vec![];
-        for code in &self.codes {
-            if let Ok(code) = RuleSelector::from_str(code) {
-                for filename in &self.filenames {
-                    codes.push(PatternPrefixPair {
-                        pattern: filename.clone(),
-                        prefix: code.clone(),
-                    });
-                }
-            } else {
-                warn_user!("Unsupported prefix code: {code}");
-            }
-        }
-        codes
-    }
-}
-
-/// Tokenize the raw 'files-to-codes' mapping.
-fn tokenize_files_to_codes_mapping(value: &str) -> Vec<Token> {
-    let mut tokens = vec![];
-    let mut i = 0;
-    while i < value.len() {
-        for (token_re, token_name) in [
-            (
-                Regex::new(r"([A-Z]+[0-9]*)(?:$|\s|,)").unwrap(),
-                TokenType::Code,
-            ),
-            (Regex::new(r"([^\s:,]+)").unwrap(), TokenType::File),
-            (Regex::new(r"(\s*:\s*)").unwrap(), TokenType::Colon),
-            (Regex::new(r"(\s*,\s*)").unwrap(), TokenType::Comma),
-            (Regex::new(r"(\s+)").unwrap(), TokenType::Ws),
-        ] {
-            if let Some(cap) = token_re.captures(&value[i..]) {
-                let mat = cap.get(1).unwrap();
-                if mat.start() == 0 {
-                    tokens.push(Token {
-                        token_name,
-                        src: mat.as_str().trim().to_string(),
-                    });
-                    i += mat.end();
-                    break;
-                }
-            }
-        }
-    }
-    tokens.push(Token {
-        token_name: TokenType::Eof,
-        src: String::new(),
-    });
-    tokens
-}
-
-/// Parse a 'files-to-codes' mapping, mimicking Flake8's internal logic.
-/// See: <https://github.com/PyCQA/flake8/blob/7dfe99616fc2f07c0017df2ba5fa884158f3ea8a/src/flake8/utils.py#L45>
-pub(crate) fn parse_files_to_codes_mapping(value: &str) -> Result<Vec<PatternPrefixPair>> {
-    if value.trim().is_empty() {
-        return Ok(vec![]);
-    }
-    let mut codes: Vec<PatternPrefixPair> = vec![];
-    let mut state = State::new();
-    for token in tokenize_files_to_codes_mapping(value) {
-        if matches!(token.token_name, TokenType::Comma | TokenType::Ws) {
-            state.seen_sep = true;
-        } else if !state.seen_colon {
-            if matches!(token.token_name, TokenType::Colon) {
-                state.seen_colon = true;
-                state.seen_sep = true;
-            } else if state.seen_sep && matches!(token.token_name, TokenType::File) {
-                state.filenames.push(token.src);
-                state.seen_sep = false;
-            } else {
-                bail!("Unexpected token: {:?}", token.token_name);
-            }
-        } else {
-            if matches!(token.token_name, TokenType::Eof) {
-                codes.extend(state.parse());
-                state = State::new();
-            } else if state.seen_sep && matches!(token.token_name, TokenType::Code) {
-                state.codes.push(token.src);
-                state.seen_sep = false;
-            } else if state.seen_sep && matches!(token.token_name, TokenType::File) {
-                codes.extend(state.parse());
-                state = State::new();
-                state.filenames.push(token.src);
-                state.seen_sep = false;
-            } else {
-                bail!("Unexpected token: {:?}", token.token_name);
-            }
-        }
-    }
-    Ok(codes)
-}
-
-/// Collect a list of `PatternPrefixPair` structs as a `BTreeMap`.
-pub(crate) fn collect_per_file_ignores(
-    pairs: Vec<PatternPrefixPair>,
-) -> FxHashMap<String, Vec<RuleSelector>> {
-    let mut per_file_ignores: FxHashMap<String, Vec<RuleSelector>> = FxHashMap::default();
-    for pair in pairs {
-        per_file_ignores
-            .entry(pair.pattern)
-            .or_default()
-            .push(pair.prefix);
-    }
-    per_file_ignores
-}
-
-#[cfg(test)]
-mod tests {
-    use anyhow::Result;
-
-    use ruff_linter::codes;
-    use ruff_linter::registry::Linter;
-    use ruff_linter::settings::types::PatternPrefixPair;
-    use ruff_linter::RuleSelector;
-
-    use super::{parse_files_to_codes_mapping, parse_prefix_codes, parse_strings};
-
-    #[test]
-    fn it_parses_prefix_codes() {
-        let actual = parse_prefix_codes("");
-        let expected: Vec<RuleSelector> = vec![];
-        assert_eq!(actual, expected);
-
-        let actual = parse_prefix_codes(" ");
-        let expected: Vec<RuleSelector> = vec![];
-        assert_eq!(actual, expected);
-
-        let actual = parse_prefix_codes("F401");
-        let expected = vec![codes::Pyflakes::_401.into()];
-        assert_eq!(actual, expected);
-
-        let actual = parse_prefix_codes("F401,");
-        let expected = vec![codes::Pyflakes::_401.into()];
-        assert_eq!(actual, expected);
-
-        let actual = parse_prefix_codes("F401,E501");
-        let expected = vec![
-            codes::Pyflakes::_401.into(),
-            codes::Pycodestyle::E501.into(),
-        ];
-        assert_eq!(actual, expected);
-
-        let actual = parse_prefix_codes("F401, E501");
-        let expected = vec![
-            codes::Pyflakes::_401.into(),
-            codes::Pycodestyle::E501.into(),
-        ];
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_parses_strings() {
-        let actual = parse_strings("");
-        let expected: Vec<String> = vec![];
-        assert_eq!(actual, expected);
-
-        let actual = parse_strings(" ");
-        let expected: Vec<String> = vec![];
-        assert_eq!(actual, expected);
-
-        let actual = parse_strings("__init__.py");
-        let expected = vec!["__init__.py".to_string()];
-        assert_eq!(actual, expected);
-
-        let actual = parse_strings("__init__.py,");
-        let expected = vec!["__init__.py".to_string()];
-        assert_eq!(actual, expected);
-
-        let actual = parse_strings("__init__.py,__main__.py");
-        let expected = vec!["__init__.py".to_string(), "__main__.py".to_string()];
-        assert_eq!(actual, expected);
-
-        let actual = parse_strings("__init__.py, __main__.py");
-        let expected = vec!["__init__.py".to_string(), "__main__.py".to_string()];
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn it_parse_files_to_codes_mapping() -> Result<()> {
-        let actual = parse_files_to_codes_mapping("")?;
-        let expected: Vec<PatternPrefixPair> = vec![];
-        assert_eq!(actual, expected);
-
-        let actual = parse_files_to_codes_mapping(" ")?;
-        let expected: Vec<PatternPrefixPair> = vec![];
-        assert_eq!(actual, expected);
-
-        // Ex) locust
-        let actual = parse_files_to_codes_mapping(
-            "per-file-ignores =
-    locust/test/*: F841
-    examples/*: F841
-    *.pyi: E302,E704"
-                .strip_prefix("per-file-ignores =")
-                .unwrap(),
-        )?;
-        let expected: Vec<PatternPrefixPair> = vec![
-            PatternPrefixPair {
-                pattern: "locust/test/*".to_string(),
-                prefix: codes::Pyflakes::_841.into(),
-            },
-            PatternPrefixPair {
-                pattern: "examples/*".to_string(),
-                prefix: codes::Pyflakes::_841.into(),
-            },
-        ];
-        assert_eq!(actual, expected);
-
-        // Ex) celery
-        let actual = parse_files_to_codes_mapping(
-            "per-file-ignores =
-   t/*,setup.py,examples/*,docs/*,extra/*:
-       D,"
-            .strip_prefix("per-file-ignores =")
-            .unwrap(),
-        )?;
-        let expected: Vec<PatternPrefixPair> = vec![
-            PatternPrefixPair {
-                pattern: "t/*".to_string(),
-                prefix: Linter::Pydocstyle.into(),
-            },
-            PatternPrefixPair {
-                pattern: "setup.py".to_string(),
-                prefix: Linter::Pydocstyle.into(),
-            },
-            PatternPrefixPair {
-                pattern: "examples/*".to_string(),
-                prefix: Linter::Pydocstyle.into(),
-            },
-            PatternPrefixPair {
-                pattern: "docs/*".to_string(),
-                prefix: Linter::Pydocstyle.into(),
-            },
-            PatternPrefixPair {
-                pattern: "extra/*".to_string(),
-                prefix: Linter::Pydocstyle.into(),
-            },
-        ];
-        assert_eq!(actual, expected);
-
-        // Ex) scrapy
-        let actual = parse_files_to_codes_mapping(
-            "per-file-ignores =
-    scrapy/__init__.py:E402
-    scrapy/core/downloader/handlers/http.py:F401
-    scrapy/http/__init__.py:F401
-    scrapy/linkextractors/__init__.py:E402,F401
-    scrapy/selector/__init__.py:F401
-    scrapy/spiders/__init__.py:E402,F401
-    scrapy/utils/url.py:F403,F405
-    tests/test_loader.py:E741"
-                .strip_prefix("per-file-ignores =")
-                .unwrap(),
-        )?;
-        let expected: Vec<PatternPrefixPair> = vec![
-            PatternPrefixPair {
-                pattern: "scrapy/__init__.py".to_string(),
-                prefix: codes::Pycodestyle::E402.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/core/downloader/handlers/http.py".to_string(),
-                prefix: codes::Pyflakes::_401.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/http/__init__.py".to_string(),
-                prefix: codes::Pyflakes::_401.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/linkextractors/__init__.py".to_string(),
-                prefix: codes::Pycodestyle::E402.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/linkextractors/__init__.py".to_string(),
-                prefix: codes::Pyflakes::_401.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/selector/__init__.py".to_string(),
-                prefix: codes::Pyflakes::_401.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/spiders/__init__.py".to_string(),
-                prefix: codes::Pycodestyle::E402.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/spiders/__init__.py".to_string(),
-                prefix: codes::Pyflakes::_401.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/utils/url.py".to_string(),
-                prefix: codes::Pyflakes::_403.into(),
-            },
-            PatternPrefixPair {
-                pattern: "scrapy/utils/url.py".to_string(),
-                prefix: codes::Pyflakes::_405.into(),
-            },
-            PatternPrefixPair {
-                pattern: "tests/test_loader.py".to_string(),
-                prefix: codes::Pycodestyle::E741.into(),
-            },
-        ];
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-}

crates/flake8_to_ruff/src/pep621.rs

@@ -1,10 +0,0 @@
-//! Extract PEP 621 configuration settings from a pyproject.toml.
-
-use pep440_rs::VersionSpecifiers;
-use serde::{Deserialize, Serialize};
-
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
-pub(crate) struct Project {
-    #[serde(alias = "requires-python", alias = "requires_python")]
-    pub(crate) requires_python: Option<VersionSpecifiers>,
-}

crates/flake8_to_ruff/src/plugin.rs

@@ -1,368 +0,0 @@
-use std::collections::{BTreeSet, HashMap, HashSet};
-use std::fmt;
-use std::str::FromStr;
-
-use anyhow::anyhow;
-use ruff_linter::registry::Linter;
-use ruff_linter::rule_selector::PreviewOptions;
-use ruff_linter::RuleSelector;
-
-#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
-pub enum Plugin {
-    Flake82020,
-    Flake8Annotations,
-    Flake8Bandit,
-    Flake8BlindExcept,
-    Flake8BooleanTrap,
-    Flake8Bugbear,
-    Flake8Builtins,
-    Flake8Commas,
-    Flake8Comprehensions,
-    Flake8Datetimez,
-    Flake8Debugger,
-    Flake8Docstrings,
-    Flake8Eradicate,
-    Flake8ErrMsg,
-    Flake8Executable,
-    Flake8ImplicitStrConcat,
-    Flake8ImportConventions,
-    Flake8NoPep420,
-    Flake8Pie,
-    Flake8Print,
-    Flake8PytestStyle,
-    Flake8Quotes,
-    Flake8Return,
-    Flake8Simplify,
-    Flake8TidyImports,
-    Flake8TypeChecking,
-    Flake8UnusedArguments,
-    Flake8UsePathlib,
-    McCabe,
-    PEP8Naming,
-    PandasVet,
-    Pyupgrade,
-    Tryceratops,
-}
-
-impl FromStr for Plugin {
-    type Err = anyhow::Error;
-
-    fn from_str(string: &str) -> Result<Self, Self::Err> {
-        match string {
-            "flake8-2020" => Ok(Plugin::Flake82020),
-            "flake8-annotations" => Ok(Plugin::Flake8Annotations),
-            "flake8-bandit" => Ok(Plugin::Flake8Bandit),
-            "flake8-blind-except" => Ok(Plugin::Flake8BlindExcept),
-            "flake8-boolean-trap" => Ok(Plugin::Flake8BooleanTrap),
-            "flake8-bugbear" => Ok(Plugin::Flake8Bugbear),
-            "flake8-builtins" => Ok(Plugin::Flake8Builtins),
-            "flake8-commas" => Ok(Plugin::Flake8Commas),
-            "flake8-comprehensions" => Ok(Plugin::Flake8Comprehensions),
-            "flake8-datetimez" => Ok(Plugin::Flake8Datetimez),
-            "flake8-debugger" => Ok(Plugin::Flake8Debugger),
-            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
-            "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
-            "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
-            "flake8-executable" => Ok(Plugin::Flake8Executable),
-            "flake8-implicit-str-concat" => Ok(Plugin::Flake8ImplicitStrConcat),
-            "flake8-import-conventions" => Ok(Plugin::Flake8ImportConventions),
-            "flake8-no-pep420" => Ok(Plugin::Flake8NoPep420),
-            "flake8-pie" => Ok(Plugin::Flake8Pie),
-            "flake8-print" => Ok(Plugin::Flake8Print),
-            "flake8-pytest-style" => Ok(Plugin::Flake8PytestStyle),
-            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
-            "flake8-return" => Ok(Plugin::Flake8Return),
-            "flake8-simplify" => Ok(Plugin::Flake8Simplify),
-            "flake8-tidy-imports" => Ok(Plugin::Flake8TidyImports),
-            "flake8-type-checking" => Ok(Plugin::Flake8TypeChecking),
-            "flake8-unused-arguments" => Ok(Plugin::Flake8UnusedArguments),
-            "flake8-use-pathlib" => Ok(Plugin::Flake8UsePathlib),
-            "mccabe" => Ok(Plugin::McCabe),
-            "pep8-naming" => Ok(Plugin::PEP8Naming),
-            "pandas-vet" => Ok(Plugin::PandasVet),
-            "pyupgrade" => Ok(Plugin::Pyupgrade),
-            "tryceratops" => Ok(Plugin::Tryceratops),
-            _ => Err(anyhow!("Unknown plugin: {string}")),
-        }
-    }
-}
-
-impl fmt::Debug for Plugin {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(
-            f,
-            "{}",
-            match self {
-                Plugin::Flake82020 => "flake8-2020",
-                Plugin::Flake8Annotations => "flake8-annotations",
-                Plugin::Flake8Bandit => "flake8-bandit",
-                Plugin::Flake8BlindExcept => "flake8-blind-except",
-                Plugin::Flake8BooleanTrap => "flake8-boolean-trap",
-                Plugin::Flake8Bugbear => "flake8-bugbear",
-                Plugin::Flake8Builtins => "flake8-builtins",
-                Plugin::Flake8Commas => "flake8-commas",
-                Plugin::Flake8Comprehensions => "flake8-comprehensions",
-                Plugin::Flake8Datetimez => "flake8-datetimez",
-                Plugin::Flake8Debugger => "flake8-debugger",
-                Plugin::Flake8Docstrings => "flake8-docstrings",
-                Plugin::Flake8Eradicate => "flake8-eradicate",
-                Plugin::Flake8ErrMsg => "flake8-errmsg",
-                Plugin::Flake8Executable => "flake8-executable",
-                Plugin::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
-                Plugin::Flake8ImportConventions => "flake8-import-conventions",
-                Plugin::Flake8NoPep420 => "flake8-no-pep420",
-                Plugin::Flake8Pie => "flake8-pie",
-                Plugin::Flake8Print => "flake8-print",
-                Plugin::Flake8PytestStyle => "flake8-pytest-style",
-                Plugin::Flake8Quotes => "flake8-quotes",
-                Plugin::Flake8Return => "flake8-return",
-                Plugin::Flake8Simplify => "flake8-simplify",
-                Plugin::Flake8TidyImports => "flake8-tidy-imports",
-                Plugin::Flake8TypeChecking => "flake8-type-checking",
-                Plugin::Flake8UnusedArguments => "flake8-unused-arguments",
-                Plugin::Flake8UsePathlib => "flake8-use-pathlib",
-                Plugin::McCabe => "mccabe",
-                Plugin::PEP8Naming => "pep8-naming",
-                Plugin::PandasVet => "pandas-vet",
-                Plugin::Pyupgrade => "pyupgrade",
-                Plugin::Tryceratops => "tryceratops",
-            }
-        )
-    }
-}
-
-impl From<&Plugin> for Linter {
-    fn from(plugin: &Plugin) -> Self {
-        match plugin {
-            Plugin::Flake82020 => Linter::Flake82020,
-            Plugin::Flake8Annotations => Linter::Flake8Annotations,
-            Plugin::Flake8Bandit => Linter::Flake8Bandit,
-            Plugin::Flake8BlindExcept => Linter::Flake8BlindExcept,
-            Plugin::Flake8BooleanTrap => Linter::Flake8BooleanTrap,
-            Plugin::Flake8Bugbear => Linter::Flake8Bugbear,
-            Plugin::Flake8Builtins => Linter::Flake8Builtins,
-            Plugin::Flake8Commas => Linter::Flake8Commas,
-            Plugin::Flake8Comprehensions => Linter::Flake8Comprehensions,
-            Plugin::Flake8Datetimez => Linter::Flake8Datetimez,
-            Plugin::Flake8Debugger => Linter::Flake8Debugger,
-            Plugin::Flake8Docstrings => Linter::Pydocstyle,
-            Plugin::Flake8Eradicate => Linter::Eradicate,
-            Plugin::Flake8ErrMsg => Linter::Flake8ErrMsg,
-            Plugin::Flake8Executable => Linter::Flake8Executable,
-            Plugin::Flake8ImplicitStrConcat => Linter::Flake8ImplicitStrConcat,
-            Plugin::Flake8ImportConventions => Linter::Flake8ImportConventions,
-            Plugin::Flake8NoPep420 => Linter::Flake8NoPep420,
-            Plugin::Flake8Pie => Linter::Flake8Pie,
-            Plugin::Flake8Print => Linter::Flake8Print,
-            Plugin::Flake8PytestStyle => Linter::Flake8PytestStyle,
-            Plugin::Flake8Quotes => Linter::Flake8Quotes,
-            Plugin::Flake8Return => Linter::Flake8Return,
-            Plugin::Flake8Simplify => Linter::Flake8Simplify,
-            Plugin::Flake8TidyImports => Linter::Flake8TidyImports,
-            Plugin::Flake8TypeChecking => Linter::Flake8TypeChecking,
-            Plugin::Flake8UnusedArguments => Linter::Flake8UnusedArguments,
-            Plugin::Flake8UsePathlib => Linter::Flake8UsePathlib,
-            Plugin::McCabe => Linter::McCabe,
-            Plugin::PEP8Naming => Linter::PEP8Naming,
-            Plugin::PandasVet => Linter::PandasVet,
-            Plugin::Pyupgrade => Linter::Pyupgrade,
-            Plugin::Tryceratops => Linter::Tryceratops,
-        }
-    }
-}
-
-/// Infer the enabled plugins based on user-provided options.
-///
-/// For example, if the user specified a `mypy-init-return` setting, we should
-/// infer that `flake8-annotations` is active.
-pub(crate) fn infer_plugins_from_options(flake8: &HashMap<String, Option<String>>) -> Vec<Plugin> {
-    let mut plugins = BTreeSet::new();
-    for key in flake8.keys() {
-        match key.as_str() {
-            // flake8-annotations
-            "suppress-none-returning" | "suppress_none_returning" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "suppress-dummy-args" | "suppress_dummy_args" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "allow-untyped-defs" | "allow_untyped_defs" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "allow-untyped-nested" | "allow_untyped_nested" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "mypy-init-return" | "mypy_init_return" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "dispatch-decorators" | "dispatch_decorators" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "overload-decorators" | "overload_decorators" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "allow-star-arg-any" | "allow_star_arg_any" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            // flake8-bugbear
-            "extend-immutable-calls" | "extend_immutable_calls" => {
-                plugins.insert(Plugin::Flake8Bugbear);
-            }
-            // flake8-builtins
-            "builtins-ignorelist" | "builtins_ignorelist" => {
-                plugins.insert(Plugin::Flake8Builtins);
-            }
-            // flake8-docstrings
-            "docstring-convention" | "docstring_convention" => {
-                plugins.insert(Plugin::Flake8Docstrings);
-            }
-            // flake8-eradicate
-            "eradicate-aggressive" | "eradicate_aggressive" => {
-                plugins.insert(Plugin::Flake8Eradicate);
-            }
-            "eradicate-whitelist" | "eradicate_whitelist" => {
-                plugins.insert(Plugin::Flake8Eradicate);
-            }
-            "eradicate-whitelist-extend" | "eradicate_whitelist_extend" => {
-                plugins.insert(Plugin::Flake8Eradicate);
-            }
-            // flake8-pytest-style
-            "pytest-fixture-no-parentheses" | "pytest_fixture_no_parentheses " => {
-                plugins.insert(Plugin::Flake8PytestStyle);
-            }
-            "pytest-parametrize-names-type" | "pytest_parametrize_names_type" => {
-                plugins.insert(Plugin::Flake8PytestStyle);
-            }
-            "pytest-parametrize-values-type" | "pytest_parametrize_values_type" => {
-                plugins.insert(Plugin::Flake8PytestStyle);
-            }
-            "pytest-parametrize-values-row-type" | "pytest_parametrize_values_row_type" => {
-                plugins.insert(Plugin::Flake8PytestStyle);
-            }
-            "pytest-raises-require-match-for" | "pytest_raises_require_match_for" => {
-                plugins.insert(Plugin::Flake8PytestStyle);
-            }
-            "pytest-mark-no-parentheses" | "pytest_mark_no_parentheses" => {
-                plugins.insert(Plugin::Flake8PytestStyle);
-            }
-            // flake8-quotes
-            "quotes" | "inline-quotes" | "inline_quotes" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            "multiline-quotes" | "multiline_quotes" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            "docstring-quotes" | "docstring_quotes" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            "avoid-escape" | "avoid_escape" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            // flake8-tidy-imports
-            "ban-relative-imports" | "ban_relative_imports" => {
-                plugins.insert(Plugin::Flake8TidyImports);
-            }
-            "banned-modules" | "banned_modules" => {
-                plugins.insert(Plugin::Flake8TidyImports);
-            }
-            // mccabe
-            "max-complexity" | "max_complexity" => {
-                plugins.insert(Plugin::McCabe);
-            }
-            // pep8-naming
-            "ignore-names" | "ignore_names" => {
-                plugins.insert(Plugin::PEP8Naming);
-            }
-            "classmethod-decorators" | "classmethod_decorators" => {
-                plugins.insert(Plugin::PEP8Naming);
-            }
-            "staticmethod-decorators" | "staticmethod_decorators" => {
-                plugins.insert(Plugin::PEP8Naming);
-            }
-            "max-string-length" | "max_string_length" => {
-                plugins.insert(Plugin::Flake8ErrMsg);
-            }
-            _ => {}
-        }
-    }
-    Vec::from_iter(plugins)
-}
-
-/// Infer the enabled plugins based on the referenced prefixes.
-///
-/// For example, if the user ignores `ANN101`, we should infer that
-/// `flake8-annotations` is active.
-pub(crate) fn infer_plugins_from_codes(selectors: &HashSet<RuleSelector>) -> Vec<Plugin> {
-    // Ignore cases in which we've knowingly changed rule prefixes.
-    [
-        Plugin::Flake82020,
-        Plugin::Flake8Annotations,
-        Plugin::Flake8Bandit,
-        // Plugin::Flake8BlindExcept,
-        Plugin::Flake8BooleanTrap,
-        Plugin::Flake8Bugbear,
-        Plugin::Flake8Builtins,
-        // Plugin::Flake8Commas,
-        Plugin::Flake8Comprehensions,
-        Plugin::Flake8Datetimez,
-        Plugin::Flake8Debugger,
-        Plugin::Flake8Docstrings,
-        // Plugin::Flake8Eradicate,
-        Plugin::Flake8ErrMsg,
-        Plugin::Flake8Executable,
-        Plugin::Flake8ImplicitStrConcat,
-        // Plugin::Flake8ImportConventions,
-        Plugin::Flake8NoPep420,
-        Plugin::Flake8Pie,
-        Plugin::Flake8Print,
-        Plugin::Flake8PytestStyle,
-        Plugin::Flake8Quotes,
-        Plugin::Flake8Return,
-        Plugin::Flake8Simplify,
-        // Plugin::Flake8TidyImports,
-        // Plugin::Flake8TypeChecking,
-        Plugin::Flake8UnusedArguments,
-        // Plugin::Flake8UsePathlib,
-        Plugin::McCabe,
-        Plugin::PEP8Naming,
-        Plugin::PandasVet,
-        Plugin::Tryceratops,
-    ]
-    .into_iter()
-    .filter(|plugin| {
-        for selector in selectors {
-            if selector
-                .rules(&PreviewOptions::default())
-                .any(|rule| Linter::from(plugin).rules().any(|r| r == rule))
-            {
-                return true;
-            }
-        }
-        false
-    })
-    .collect()
-}
-
-#[cfg(test)]
-mod tests {
-    use std::collections::HashMap;
-
-    use super::{infer_plugins_from_options, Plugin};
-
-    #[test]
-    fn it_infers_plugins() {
-        let actual = infer_plugins_from_options(&HashMap::from([(
-            "inline-quotes".to_string(),
-            Some("single".to_string()),
-        )]));
-        let expected = vec![Plugin::Flake8Quotes];
-        assert_eq!(actual, expected);
-
-        let actual = infer_plugins_from_options(&HashMap::from([(
-            "staticmethod-decorators".to_string(),
-            Some("[]".to_string()),
-        )]));
-        let expected = vec![Plugin::PEP8Naming];
-        assert_eq!(actual, expected);
-    }
-}

crates/flake8_to_ruff/src/pyproject.rs

@@ -1,26 +0,0 @@
-use std::path::Path;
-
-use anyhow::Result;
-use serde::{Deserialize, Serialize};
-
-use super::black::Black;
-use super::isort::Isort;
-use super::pep621::Project;
-
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub(crate) struct Tools {
-    pub(crate) black: Option<Black>,
-    pub(crate) isort: Option<Isort>,
-}
-
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub(crate) struct Pyproject {
-    pub(crate) tool: Option<Tools>,
-    pub(crate) project: Option<Project>,
-}
-
-pub(crate) fn parse<P: AsRef<Path>>(path: P) -> Result<Pyproject> {
-    let contents = std::fs::read_to_string(path)?;
-    let pyproject = toml::from_str::<Pyproject>(&contents)?;
-    Ok(pyproject)
-}

crates/ruff/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
-name = "ruff_cli"
-version = "0.1.9"
+name = "ruff"
+version = "0.2.1"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }
@@ -10,72 +10,67 @@ documentation = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 readme = "../../README.md"
-
-[[bin]]
-name = "ruff"
+default-run = "ruff"
 
 [dependencies]
-ruff_linter = { path = "../ruff_linter", features = ["clap"] }
 ruff_cache = { path = "../ruff_cache" }
 ruff_diagnostics = { path = "../ruff_diagnostics" }
-ruff_formatter = { path = "../ruff_formatter" }
-ruff_notebook = { path = "../ruff_notebook" }
+ruff_linter = { path = "../ruff_linter", features = ["clap"] }
 ruff_macros = { path = "../ruff_macros" }
+ruff_notebook = { path = "../ruff_notebook" }
 ruff_python_ast = { path = "../ruff_python_ast" }
 ruff_python_formatter = { path = "../ruff_python_formatter" }
 ruff_source_file = { path = "../ruff_source_file" }
-ruff_python_trivia = { path = "../ruff_python_trivia" }
-ruff_workspace = { path = "../ruff_workspace" }
 ruff_text_size = { path = "../ruff_text_size" }
+ruff_workspace = { path = "../ruff_workspace" }
 
-annotate-snippets = { version = "0.9.2", features = ["color"] }
 anyhow = { workspace = true }
-argfile = { version = "0.1.6" }
-bincode = { version = "1.3.3" }
+argfile = { workspace = true }
+bincode = { workspace = true }
 bitflags = { workspace = true }
-cachedir = { version = "0.3.1" }
+cachedir = { workspace = true }
 chrono = { workspace = true }
-clap = { workspace = true, features = ["derive", "env"] }
-clap_complete_command = { version = "0.5.1" }
-clearscreen = { version = "2.0.0" }
+clap = { workspace = true, features = ["derive", "env", "wrap_help"] }
+clap_complete_command = { workspace = true }
+clearscreen = { workspace = true }
 colored = { workspace = true }
 filetime = { workspace = true }
-glob = { workspace = true }
 ignore = { workspace = true }
 is-macro = { workspace = true }
 itertools = { workspace = true }
 log = { workspace = true }
-notify = { version = "6.1.1" }
+notify = { workspace = true }
 path-absolutize = { workspace = true, features = ["once_cell_cache"] }
-rayon = { version = "1.8.0" }
+rayon = { workspace = true }
 regex = { workspace = true }
-ruff_python_stdlib = { path = "../ruff_python_stdlib" }
 rustc-hash = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 shellexpand = { workspace = true }
-similar = { workspace = true }
 strum = { workspace = true, features = [] }
+tempfile = { workspace = true }
 thiserror = { workspace = true }
+toml = { workspace = true }
 tracing = { workspace = true, features = ["log"] }
-walkdir = { version = "2.3.2" }
-wild = { version = "2" }
+walkdir = { workspace = true }
+wild = { workspace = true }
 
 [dev-dependencies]
-assert_cmd = { version = "2.0.8" }
+# Enable test rules during development
+ruff_linter = { path = "../ruff_linter", features = ["clap", "test-rules"] }
+assert_cmd = { workspace = true }
 # Avoid writing colored snapshots when running tests from the terminal
 colored = { workspace = true, features = ["no-color"]}
 insta = { workspace = true, features = ["filters", "json"] }
-insta-cmd = { version = "0.4.0" }
-tempfile = "3.8.1"
+insta-cmd = { workspace = true }
+tempfile = { workspace = true }
 test-case = { workspace = true }
-ureq = { version = "2.9.1", features = [] }
 
 [target.'cfg(target_os = "windows")'.dependencies]
-mimalloc = "0.1.39"
+mimalloc = { workspace = true }
 
 [target.'cfg(all(not(target_os = "windows"), not(target_os = "openbsd"), any(target_arch = "x86_64", target_arch = "aarch64", target_arch = "powerpc64")))'.dependencies]
-tikv-jemallocator = "0.5.0"
+tikv-jemallocator = { workspace = true }
 
 [lints]
 workspace = true

crates/ruff/src/cache.rs

@@ -1,7 +1,7 @@
 use std::fmt::Debug;
 use std::fs::{self, File};
 use std::hash::Hasher;
-use std::io::{self, BufReader, BufWriter, Write};
+use std::io::{self, BufReader, Write};
 use std::path::{Path, PathBuf};
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::Mutex;
@@ -15,6 +15,7 @@ use rayon::iter::ParallelIterator;
 use rayon::iter::{IntoParallelIterator, ParallelBridge};
 use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};
+use tempfile::NamedTempFile;
 
 use ruff_cache::{CacheKey, CacheKeyHasher};
 use ruff_diagnostics::{DiagnosticKind, Fix};
@@ -25,10 +26,9 @@ use ruff_notebook::NotebookIndex;
 use ruff_python_ast::imports::ImportMap;
 use ruff_source_file::SourceFileBuilder;
 use ruff_text_size::{TextRange, TextSize};
-use ruff_workspace::resolver::{PyprojectConfig, PyprojectDiscoveryStrategy, Resolver};
+use ruff_workspace::resolver::Resolver;
 use ruff_workspace::Settings;
 
-use crate::cache;
 use crate::diagnostics::Diagnostics;
 
 /// [`Path`] that is relative to the package root in [`PackageCache`].
@@ -86,6 +86,7 @@ pub(crate) struct Cache {
     changes: Mutex<Vec<Change>>,
     /// The "current" timestamp used as cache for the updates of
     /// [`FileCache::last_seen`]
+    #[allow(clippy::struct_field_names)]
     last_seen_cache: u64,
 }
 
@@ -165,15 +166,29 @@ impl Cache {
             return Ok(());
         }
 
-        let file = File::create(&self.path)
-            .with_context(|| format!("Failed to create cache file '{}'", self.path.display()))?;
-        let writer = BufWriter::new(file);
-        bincode::serialize_into(writer, &self.package).with_context(|| {
+        // Write the cache to a temporary file first and then rename it for an "atomic" write.
+        // Protects against data loss if the process is killed during the write and races between different ruff
+        // processes, resulting in a corrupted cache file. https://github.com/astral-sh/ruff/issues/8147#issuecomment-1943345964
+        let mut temp_file =
+            NamedTempFile::new_in(self.path.parent().expect("Write path must have a parent"))
+                .context("Failed to create temporary file")?;
+
+        // Serialize to in-memory buffer because hyperfine benchmark showed that it's faster than
+        // using a `BufWriter` and our cache files are small enough that streaming isn't necessary.
+        let serialized =
+            bincode::serialize(&self.package).context("Failed to serialize cache data")?;
+        temp_file
+            .write_all(&serialized)
+            .context("Failed to write serialized cache to temporary file.")?;
+
+        temp_file.persist(&self.path).with_context(|| {
             format!(
-                "Failed to serialise cache to file '{}'",
+                "Failed to rename temporary cache file to {}",
                 self.path.display()
             )
-        })
+        })?;
+
+        Ok(())
     }
 
     /// Applies the pending changes without storing the cache to disk.
@@ -442,7 +457,7 @@ pub(super) struct CacheMessage {
 pub(crate) trait PackageCaches {
     fn get(&self, package_root: &Path) -> Option<&Cache>;
 
-    fn persist(self) -> anyhow::Result<()>;
+    fn persist(self) -> Result<()>;
 }
 
 impl<T> PackageCaches for Option<T>
@@ -468,27 +483,17 @@ pub(crate) struct PackageCacheMap<'a>(FxHashMap<&'a Path, Cache>);
 
 impl<'a> PackageCacheMap<'a> {
     pub(crate) fn init(
-        pyproject_config: &PyprojectConfig,
         package_roots: &FxHashMap<&'a Path, Option<&'a Path>>,
         resolver: &Resolver,
     ) -> Self {
         fn init_cache(path: &Path) {
-            if let Err(e) = cache::init(path) {
+            if let Err(e) = init(path) {
                 error!("Failed to initialize cache at {}: {e:?}", path.display());
             }
         }
 
-        match pyproject_config.strategy {
-            PyprojectDiscoveryStrategy::Fixed => {
-                init_cache(&pyproject_config.settings.cache_dir);
-            }
-            PyprojectDiscoveryStrategy::Hierarchical => {
-                for settings in
-                    std::iter::once(&pyproject_config.settings).chain(resolver.settings())
-                {
-                    init_cache(&settings.cache_dir);
-                }
-            }
+        for settings in resolver.settings() {
+            init_cache(&settings.cache_dir);
         }
 
         Self(
@@ -498,7 +503,7 @@ impl<'a> PackageCacheMap<'a> {
                 .unique()
                 .par_bridge()
                 .map(|cache_root| {
-                    let settings = resolver.resolve(cache_root, pyproject_config);
+                    let settings = resolver.resolve(cache_root);
                     let cache = Cache::open(cache_root.to_path_buf(), settings);
                     (cache_root, cache)
                 })
@@ -1060,6 +1065,7 @@ mod tests {
                 &self.settings.formatter,
                 PySourceType::Python,
                 FormatMode::Write,
+                None,
                 Some(cache),
             )
         }

crates/ruff/src/commands/add_noqa.rs

@@ -12,17 +12,17 @@ use ruff_linter::warn_user_once;
 use ruff_python_ast::{PySourceType, SourceType};
 use ruff_workspace::resolver::{python_files_in_path, PyprojectConfig, ResolvedFile};
 
-use crate::args::CliOverrides;
+use crate::args::ConfigArguments;
 
 /// Add `noqa` directives to a collection of files.
 pub(crate) fn add_noqa(
     files: &[PathBuf],
     pyproject_config: &PyprojectConfig,
-    overrides: &CliOverrides,
+    config_arguments: &ConfigArguments,
 ) -> Result<usize> {
     // Collect all the files to check.
     let start = Instant::now();
-    let (paths, resolver) = python_files_in_path(files, pyproject_config, overrides)?;
+    let (paths, resolver) = python_files_in_path(files, pyproject_config, config_arguments)?;
     let duration = start.elapsed();
     debug!("Identified files to lint in: {:?}", duration);
 
@@ -38,7 +38,6 @@ pub(crate) fn add_noqa(
             .flatten()
             .map(ResolvedFile::path)
             .collect::<Vec<_>>(),
-        pyproject_config,
     );
 
     let start = Instant::now();
@@ -57,7 +56,7 @@ pub(crate) fn add_noqa(
                 .parent()
                 .and_then(|parent| package_roots.get(parent))
                 .and_then(|package| *package);
-            let settings = resolver.resolve(path, pyproject_config);
+            let settings = resolver.resolve(path);
             let source_kind = match SourceKind::from_path(path, source_type) {
                 Ok(Some(source_kind)) => source_kind,
                 Ok(None) => return None,

crates/ruff/src/commands/check.rs

@@ -24,7 +24,7 @@ use ruff_workspace::resolver::{
     match_exclusion, python_files_in_path, PyprojectConfig, ResolvedFile,
 };
 
-use crate::args::CliOverrides;
+use crate::args::ConfigArguments;
 use crate::cache::{Cache, PackageCacheMap, PackageCaches};
 use crate::diagnostics::Diagnostics;
 use crate::panic::catch_unwind;
@@ -34,7 +34,7 @@ use crate::panic::catch_unwind;
 pub(crate) fn check(
     files: &[PathBuf],
     pyproject_config: &PyprojectConfig,
-    overrides: &CliOverrides,
+    config_arguments: &ConfigArguments,
     cache: flags::Cache,
     noqa: flags::Noqa,
     fix_mode: flags::FixMode,
@@ -42,7 +42,7 @@ pub(crate) fn check(
 ) -> Result<Diagnostics> {
     // Collect all the Python files to check.
     let start = Instant::now();
-    let (paths, resolver) = python_files_in_path(files, pyproject_config, overrides)?;
+    let (paths, resolver) = python_files_in_path(files, pyproject_config, config_arguments)?;
     debug!("Identified files to lint in: {:?}", start.elapsed());
 
     if paths.is_empty() {
@@ -57,16 +57,11 @@ pub(crate) fn check(
             .flatten()
             .map(ResolvedFile::path)
             .collect::<Vec<_>>(),
-        pyproject_config,
     );
 
     // Load the caches.
     let caches = if bool::from(cache) {
-        Some(PackageCacheMap::init(
-            pyproject_config,
-            &package_roots,
-            &resolver,
-        ))
+        Some(PackageCacheMap::init(&package_roots, &resolver))
     } else {
         None
     };
@@ -81,7 +76,7 @@ pub(crate) fn check(
                     .and_then(|parent| package_roots.get(parent))
                     .and_then(|package| *package);
 
-                let settings = resolver.resolve(path, pyproject_config);
+                let settings = resolver.resolve(path);
 
                 if (settings.file_resolver.force_exclude || !resolved_file.is_root())
                     && match_exclusion(
@@ -128,7 +123,7 @@ pub(crate) fn check(
 
         Some(result.unwrap_or_else(|(path, message)| {
             if let Some(path) = &path {
-                let settings = resolver.resolve(path, pyproject_config);
+                let settings = resolver.resolve(path);
                 if settings.linter.rules.enabled(Rule::IOError) {
                     let dummy =
                         SourceFileBuilder::new(path.to_string_lossy().as_ref(), "").finish();
@@ -238,7 +233,7 @@ mod test {
     use ruff_workspace::resolver::{PyprojectConfig, PyprojectDiscoveryStrategy};
     use ruff_workspace::Settings;
 
-    use crate::args::CliOverrides;
+    use crate::args::ConfigArguments;
 
     use super::check;
 
@@ -277,7 +272,7 @@ mod test {
             // Notebooks are not included by default
             &[tempdir.path().to_path_buf(), notebook],
             &pyproject_config,
-            &CliOverrides::default(),
+            &ConfigArguments::default(),
             flags::Cache::Disabled,
             flags::Noqa::Disabled,
             flags::FixMode::Generate,

crates/ruff/src/commands/check_stdin.rs

@@ -4,9 +4,9 @@ use anyhow::Result;
 
 use ruff_linter::packaging;
 use ruff_linter::settings::flags;
-use ruff_workspace::resolver::{match_exclusion, python_file_at_path, PyprojectConfig};
+use ruff_workspace::resolver::{match_exclusion, python_file_at_path, PyprojectConfig, Resolver};
 
-use crate::args::CliOverrides;
+use crate::args::ConfigArguments;
 use crate::diagnostics::{lint_stdin, Diagnostics};
 use crate::stdin::{parrot_stdin, read_from_stdin};
 
@@ -14,24 +14,24 @@ use crate::stdin::{parrot_stdin, read_from_stdin};
 pub(crate) fn check_stdin(
     filename: Option<&Path>,
     pyproject_config: &PyprojectConfig,
-    overrides: &CliOverrides,
+    overrides: &ConfigArguments,
     noqa: flags::Noqa,
     fix_mode: flags::FixMode,
 ) -> Result<Diagnostics> {
-    if pyproject_config.settings.file_resolver.force_exclude {
+    let mut resolver = Resolver::new(pyproject_config);
+
+    if resolver.force_exclude() {
         if let Some(filename) = filename {
-            if !python_file_at_path(filename, pyproject_config, overrides)? {
+            if !python_file_at_path(filename, &mut resolver, overrides)? {
                 if fix_mode.is_apply() {
                     parrot_stdin()?;
                 }
                 return Ok(Diagnostics::default());
             }
 
-            let lint_settings = &pyproject_config.settings.linter;
-            if filename
-                .file_name()
-                .is_some_and(|name| match_exclusion(filename, name, &lint_settings.exclude))
-            {
+            if filename.file_name().is_some_and(|name| {
+                match_exclusion(filename, name, &resolver.base_settings().linter.exclude)
+            }) {
                 if fix_mode.is_apply() {
                     parrot_stdin()?;
                 }
@@ -41,13 +41,13 @@ pub(crate) fn check_stdin(
     }
     let stdin = read_from_stdin()?;
     let package_root = filename.and_then(Path::parent).and_then(|path| {
-        packaging::detect_package_root(path, &pyproject_config.settings.linter.namespace_packages)
+        packaging::detect_package_root(path, &resolver.base_settings().linter.namespace_packages)
     });
     let mut diagnostics = lint_stdin(
         filename,
         package_root,
         stdin,
-        &pyproject_config.settings,
+        resolver.base_settings(),
         noqa,
         fix_mode,
     )?;

crates/ruff/src/commands/format.rs

@@ -17,20 +17,19 @@ use tracing::debug;
 
 use ruff_diagnostics::SourceMap;
 use ruff_linter::fs;
-use ruff_linter::logging::LogLevel;
+use ruff_linter::logging::{DisplayParseError, LogLevel};
 use ruff_linter::registry::Rule;
 use ruff_linter::rules::flake8_quotes::settings::Quote;
 use ruff_linter::source_kind::{SourceError, SourceKind};
 use ruff_linter::warn_user_once;
 use ruff_python_ast::{PySourceType, SourceType};
-use ruff_python_formatter::{format_module_source, FormatModuleError, QuoteStyle};
+use ruff_python_formatter::{format_module_source, format_range, FormatModuleError, QuoteStyle};
+use ruff_source_file::LineIndex;
 use ruff_text_size::{TextLen, TextRange, TextSize};
-use ruff_workspace::resolver::{
-    match_exclusion, python_files_in_path, PyprojectConfig, ResolvedFile, Resolver,
-};
+use ruff_workspace::resolver::{match_exclusion, python_files_in_path, ResolvedFile, Resolver};
 use ruff_workspace::FormatterSettings;
 
-use crate::args::{CliOverrides, FormatArguments};
+use crate::args::{ConfigArguments, FormatArguments, FormatRange};
 use crate::cache::{Cache, FileCacheKey, PackageCacheMap, PackageCaches};
 use crate::panic::{catch_unwind, PanicError};
 use crate::resolve::resolve;
@@ -61,25 +60,31 @@ impl FormatMode {
 /// Format a set of files, and return the exit status.
 pub(crate) fn format(
     cli: FormatArguments,
-    overrides: &CliOverrides,
+    config_arguments: &ConfigArguments,
     log_level: LogLevel,
 ) -> Result<ExitStatus> {
     let pyproject_config = resolve(
         cli.isolated,
-        cli.config.as_deref(),
-        overrides,
+        config_arguments,
         cli.stdin_filename.as_deref(),
     )?;
     let mode = FormatMode::from_cli(&cli);
     let files = resolve_default_files(cli.files, false);
-    let (paths, resolver) = python_files_in_path(&files, &pyproject_config, overrides)?;
+    let (paths, resolver) = python_files_in_path(&files, &pyproject_config, config_arguments)?;
 
     if paths.is_empty() {
         warn_user_once!("No Python files found under the given path(s)");
         return Ok(ExitStatus::Success);
     }
 
-    warn_incompatible_formatter_settings(&pyproject_config, Some(&resolver));
+    if cli.range.is_some() && paths.len() > 1 {
+        return Err(anyhow::anyhow!(
+            "The `--range` option is only supported when formatting a single file but the specified paths resolve to {} files.",
+            paths.len()
+        ));
+    }
+
+    warn_incompatible_formatter_settings(&resolver);
 
     // Discover the package root for each Python file.
     let package_roots = resolver.package_roots(
@@ -88,7 +93,6 @@ pub(crate) fn format(
             .flatten()
             .map(ResolvedFile::path)
             .collect::<Vec<_>>(),
-        &pyproject_config,
     );
 
     let caches = if cli.no_cache {
@@ -99,11 +103,7 @@ pub(crate) fn format(
         #[cfg(debug_assertions)]
         crate::warn_user!("Detected debug build without --no-cache.");
 
-        Some(PackageCacheMap::init(
-            &pyproject_config,
-            &package_roots,
-            &resolver,
-        ))
+        Some(PackageCacheMap::init(&package_roots, &resolver))
     };
 
     let start = Instant::now();
@@ -113,12 +113,18 @@ pub(crate) fn format(
             match entry {
                 Ok(resolved_file) => {
                     let path = resolved_file.path();
-                    let SourceType::Python(source_type) = SourceType::from(&path) else {
-                        // Ignore any non-Python files.
-                        return None;
-                    };
+                    let settings = resolver.resolve(path);
 
-                    let settings = resolver.resolve(path, &pyproject_config);
+                    let source_type = match settings.formatter.extension.get(path) {
+                        None => match SourceType::from(path) {
+                            SourceType::Python(source_type) => source_type,
+                            SourceType::Toml(_) => {
+                                // Ignore any non-Python files.
+                                return None;
+                            }
+                        },
+                        Some(language) => PySourceType::from(language),
+                    };
 
                     // Ignore files that are excluded from formatting
                     if (settings.file_resolver.force_exclude || !resolved_file.is_root())
@@ -140,7 +146,14 @@ pub(crate) fn format(
 
                     Some(
                         match catch_unwind(|| {
-                            format_path(path, &settings.formatter, source_type, mode, cache)
+                            format_path(
+                                path,
+                                &settings.formatter,
+                                source_type,
+                                mode,
+                                cli.range,
+                                cache,
+                            )
                         }) {
                             Ok(inner) => inner.map(|result| FormatPathResult {
                                 path: resolved_file.path().to_path_buf(),
@@ -227,6 +240,7 @@ pub(crate) fn format_path(
     settings: &FormatterSettings,
     source_type: PySourceType,
     mode: FormatMode,
+    range: Option<FormatRange>,
     cache: Option<&Cache>,
 ) -> Result<FormatResult, FormatCommandError> {
     if let Some(cache) = cache {
@@ -244,15 +258,19 @@ pub(crate) fn format_path(
     // Extract the sources from the file.
     let unformatted = match SourceKind::from_path(path, source_type) {
         Ok(Some(source_kind)) => source_kind,
-        // Non Python Jupyter notebook
+        // Non-Python Jupyter notebook.
         Ok(None) => return Ok(FormatResult::Skipped),
         Err(err) => {
             return Err(FormatCommandError::Read(Some(path.to_path_buf()), err));
         }
     };
 
+    // Don't write back to the cache if formatting a range.
+    let cache = cache.filter(|_| range.is_none());
+
     // Format the source.
-    let format_result = match format_source(&unformatted, source_type, Some(path), settings)? {
+    let format_result = match format_source(&unformatted, source_type, Some(path), settings, range)?
+    {
         FormattedSource::Formatted(formatted) => match mode {
             FormatMode::Write => {
                 let mut writer = File::create(path).map_err(|err| {
@@ -320,15 +338,43 @@ pub(crate) fn format_source(
     source_type: PySourceType,
     path: Option<&Path>,
     settings: &FormatterSettings,
+    range: Option<FormatRange>,
 ) -> Result<FormattedSource, FormatCommandError> {
-    match source_kind {
+    match &source_kind {
         SourceKind::Python(unformatted) => {
             let options = settings.to_format_options(source_type, unformatted);
 
-            let formatted = format_module_source(unformatted, options)
-                .map_err(|err| FormatCommandError::Format(path.map(Path::to_path_buf), err))?;
+            let formatted = if let Some(range) = range {
+                let line_index = LineIndex::from_source_text(unformatted);
+                let byte_range = range.to_text_range(unformatted, &line_index);
+                format_range(unformatted, byte_range, options).map(|formatted_range| {
+                    let mut formatted = unformatted.to_string();
+                    formatted.replace_range(
+                        std::ops::Range::<usize>::from(formatted_range.source_range()),
+                        formatted_range.as_code(),
+                    );
+
+                    formatted
+                })
+            } else {
+                // Using `Printed::into_code` requires adding `ruff_formatter` as a direct dependency, and I suspect that Rust can optimize the closure away regardless.
+                #[allow(clippy::redundant_closure_for_method_calls)]
+                format_module_source(unformatted, options).map(|formatted| formatted.into_code())
+            };
+
+            let formatted = formatted.map_err(|err| {
+                if let FormatModuleError::ParseError(err) = err {
+                    DisplayParseError::from_source_kind(
+                        err,
+                        path.map(Path::to_path_buf),
+                        source_kind,
+                    )
+                    .into()
+                } else {
+                    FormatCommandError::Format(path.map(Path::to_path_buf), err)
+                }
+            })?;
 
-            let formatted = formatted.into_code();
             if formatted.len() == unformatted.len() && formatted == *unformatted {
                 Ok(FormattedSource::Unchanged)
             } else {
@@ -340,6 +386,12 @@ pub(crate) fn format_source(
                 return Ok(FormattedSource::Unchanged);
             }
 
+            if range.is_some() {
+                return Err(FormatCommandError::RangeFormatNotebook(
+                    path.map(Path::to_path_buf),
+                ));
+            }
+
             let options = settings.to_format_options(source_type, notebook.source_code());
 
             let mut output: Option<String> = None;
@@ -352,8 +404,19 @@ pub(crate) fn format_source(
                 let unformatted = &notebook.source_code()[range];
 
                 // Format the cell.
-                let formatted = format_module_source(unformatted, options.clone())
-                    .map_err(|err| FormatCommandError::Format(path.map(Path::to_path_buf), err))?;
+                let formatted =
+                    format_module_source(unformatted, options.clone()).map_err(|err| {
+                        if let FormatModuleError::ParseError(err) = err {
+                            DisplayParseError::from_source_kind(
+                                err,
+                                path.map(Path::to_path_buf),
+                                source_kind,
+                            )
+                            .into()
+                        } else {
+                            FormatCommandError::Format(path.map(Path::to_path_buf), err)
+                        }
+                    })?;
 
                 // If the cell is unchanged, skip it.
                 let formatted = formatted.as_code();
@@ -408,11 +471,13 @@ pub(crate) fn format_source(
 pub(crate) enum FormatResult {
     /// The file was formatted.
     Formatted,
+
     /// The file was formatted, [`SourceKind`] contains the formatted code
     Diff {
         unformatted: SourceKind,
         formatted: SourceKind,
     },
+
     /// The file was unchanged, as the formatted contents matched the existing contents.
     Unchanged,
 
@@ -561,11 +626,13 @@ impl<'a> FormatResults<'a> {
 #[derive(Error, Debug)]
 pub(crate) enum FormatCommandError {
     Ignore(#[from] ignore::Error),
+    Parse(#[from] DisplayParseError),
     Panic(Option<PathBuf>, PanicError),
     Read(Option<PathBuf>, SourceError),
     Format(Option<PathBuf>, FormatModuleError),
     Write(Option<PathBuf>, SourceError),
     Diff(Option<PathBuf>, io::Error),
+    RangeFormatNotebook(Option<PathBuf>),
 }
 
 impl FormatCommandError {
@@ -578,11 +645,13 @@ impl FormatCommandError {
                     None
                 }
             }
+            Self::Parse(err) => err.path(),
             Self::Panic(path, _)
             | Self::Read(path, _)
             | Self::Format(path, _)
             | Self::Write(path, _)
-            | Self::Diff(path, _) => path.as_deref(),
+            | Self::Diff(path, _)
+            | Self::RangeFormatNotebook(path) => path.as_deref(),
         }
     }
 }
@@ -604,13 +673,17 @@ impl Display for FormatCommandError {
                 } else {
                     write!(
                         f,
-                        "{} {}",
-                        "Encountered error:".bold(),
-                        err.io_error()
+                        "{header} {error}",
+                        header = "Encountered error:".bold(),
+                        error = err
+                            .io_error()
                             .map_or_else(|| err.to_string(), std::string::ToString::to_string)
                     )
                 }
             }
+            Self::Parse(err) => {
+                write!(f, "{err}")
+            }
             Self::Read(path, err) => {
                 if let Some(path) = path {
                     write!(
@@ -621,7 +694,7 @@ impl Display for FormatCommandError {
                         ":".bold()
                     )
                 } else {
-                    write!(f, "{}{} {err}", "Failed to read".bold(), ":".bold())
+                    write!(f, "{header} {err}", header = "Failed to read:".bold())
                 }
             }
             Self::Write(path, err) => {
@@ -634,7 +707,7 @@ impl Display for FormatCommandError {
                         ":".bold()
                     )
                 } else {
-                    write!(f, "{}{} {err}", "Failed to write".bold(), ":".bold())
+                    write!(f, "{header} {err}", header = "Failed to write:".bold())
                 }
             }
             Self::Format(path, err) => {
@@ -647,7 +720,7 @@ impl Display for FormatCommandError {
                         ":".bold()
                     )
                 } else {
-                    write!(f, "{}{} {err}", "Failed to format".bold(), ":".bold())
+                    write!(f, "{header} {err}", header = "Failed to format:".bold())
                 }
             }
             Self::Diff(path, err) => {
@@ -662,9 +735,25 @@ impl Display for FormatCommandError {
                 } else {
                     write!(
                         f,
-                        "{}{} {err}",
-                        "Failed to generate diff".bold(),
-                        ":".bold()
+                        "{header} {err}",
+                        header = "Failed to generate diff:".bold(),
+                    )
+                }
+            }
+            Self::RangeFormatNotebook(path) => {
+                if let Some(path) = path {
+                    write!(
+                        f,
+                        "{header}{path}{colon} Range formatting isn't supported for notebooks.",
+                        header = "Failed to format ".bold(),
+                        path = fs::relativize_path(path).bold(),
+                        colon = ":".bold()
+                    )
+                } else {
+                    write!(
+                        f,
+                        "{header} Range formatting isn't supported for notebooks",
+                        header = "Failed to format:".bold()
                     )
                 }
             }
@@ -695,15 +784,10 @@ impl Display for FormatCommandError {
     }
 }
 
-pub(super) fn warn_incompatible_formatter_settings(
-    pyproject_config: &PyprojectConfig,
-    resolver: Option<&Resolver>,
-) {
+pub(super) fn warn_incompatible_formatter_settings(resolver: &Resolver) {
     // First, collect all rules that are incompatible regardless of the linter-specific settings.
     let mut incompatible_rules = FxHashSet::default();
-    for setting in std::iter::once(&pyproject_config.settings)
-        .chain(resolver.iter().flat_map(|resolver| resolver.settings()))
-    {
+    for setting in resolver.settings() {
         for rule in [
             // The formatter might collapse implicit string concatenation on a single line.
             Rule::SingleLineImplicitStringConcatenation,
@@ -732,9 +816,7 @@ pub(super) fn warn_incompatible_formatter_settings(
     }
 
     // Next, validate settings-specific incompatibilities.
-    for setting in std::iter::once(&pyproject_config.settings)
-        .chain(resolver.iter().flat_map(|resolver| resolver.settings()))
-    {
+    for setting in resolver.settings() {
         // Validate all rules that rely on tab styles.
         if setting.linter.rules.enabled(Rule::TabIndentation)
             && setting.formatter.indent_style.is_tab()

crates/ruff/src/commands/format_stdin.rs

@@ -6,10 +6,10 @@ use log::error;
 
 use ruff_linter::source_kind::SourceKind;
 use ruff_python_ast::{PySourceType, SourceType};
-use ruff_workspace::resolver::{match_exclusion, python_file_at_path};
+use ruff_workspace::resolver::{match_exclusion, python_file_at_path, Resolver};
 use ruff_workspace::FormatterSettings;
 
-use crate::args::{CliOverrides, FormatArguments};
+use crate::args::{ConfigArguments, FormatArguments, FormatRange};
 use crate::commands::format::{
     format_source, warn_incompatible_formatter_settings, FormatCommandError, FormatMode,
     FormatResult, FormattedSource,
@@ -19,32 +19,33 @@ use crate::stdin::{parrot_stdin, read_from_stdin};
 use crate::ExitStatus;
 
 /// Run the formatter over a single file, read from `stdin`.
-pub(crate) fn format_stdin(cli: &FormatArguments, overrides: &CliOverrides) -> Result<ExitStatus> {
+pub(crate) fn format_stdin(
+    cli: &FormatArguments,
+    config_arguments: &ConfigArguments,
+) -> Result<ExitStatus> {
     let pyproject_config = resolve(
         cli.isolated,
-        cli.config.as_deref(),
-        overrides,
+        config_arguments,
         cli.stdin_filename.as_deref(),
     )?;
 
-    warn_incompatible_formatter_settings(&pyproject_config, None);
+    let mut resolver = Resolver::new(&pyproject_config);
+    warn_incompatible_formatter_settings(&resolver);
 
     let mode = FormatMode::from_cli(cli);
 
-    if pyproject_config.settings.file_resolver.force_exclude {
+    if resolver.force_exclude() {
         if let Some(filename) = cli.stdin_filename.as_deref() {
-            if !python_file_at_path(filename, &pyproject_config, overrides)? {
+            if !python_file_at_path(filename, &mut resolver, config_arguments)? {
                 if mode.is_write() {
                     parrot_stdin()?;
                 }
                 return Ok(ExitStatus::Success);
             }
 
-            let format_settings = &pyproject_config.settings.formatter;
-            if filename
-                .file_name()
-                .is_some_and(|name| match_exclusion(filename, name, &format_settings.exclude))
-            {
+            if filename.file_name().is_some_and(|name| {
+                match_exclusion(filename, name, &resolver.base_settings().formatter.exclude)
+            }) {
                 if mode.is_write() {
                     parrot_stdin()?;
                 }
@@ -54,21 +55,23 @@ pub(crate) fn format_stdin(cli: &FormatArguments, overrides: &CliOverrides) -> R
     }
 
     let path = cli.stdin_filename.as_deref();
+    let settings = &resolver.base_settings().formatter;
 
-    let SourceType::Python(source_type) = path.map(SourceType::from).unwrap_or_default() else {
-        if mode.is_write() {
-            parrot_stdin()?;
-        }
-        return Ok(ExitStatus::Success);
+    let source_type = match path.and_then(|path| settings.extension.get(path)) {
+        None => match path.map(SourceType::from).unwrap_or_default() {
+            SourceType::Python(source_type) => source_type,
+            SourceType::Toml(_) => {
+                if mode.is_write() {
+                    parrot_stdin()?;
+                }
+                return Ok(ExitStatus::Success);
+            }
+        },
+        Some(language) => PySourceType::from(language),
     };
 
     // Format the file.
-    match format_source_code(
-        path,
-        &pyproject_config.settings.formatter,
-        source_type,
-        mode,
-    ) {
+    match format_source_code(path, cli.range, settings, source_type, mode) {
         Ok(result) => match mode {
             FormatMode::Write => Ok(ExitStatus::Success),
             FormatMode::Check | FormatMode::Diff => {
@@ -89,6 +92,7 @@ pub(crate) fn format_stdin(cli: &FormatArguments, overrides: &CliOverrides) -> R
 /// Format source code read from `stdin`.
 fn format_source_code(
     path: Option<&Path>,
+    range: Option<FormatRange>,
     settings: &FormatterSettings,
     source_type: PySourceType,
     mode: FormatMode,
@@ -106,7 +110,7 @@ fn format_source_code(
     };
 
     // Format the source.
-    let formatted = format_source(&source_kind, source_type, path, settings)?;
+    let formatted = format_source(&source_kind, source_type, path, settings, range)?;
 
     match &formatted {
         FormattedSource::Formatted(formatted) => match mode {

crates/ruff/src/commands/rule.rs

@@ -18,6 +18,7 @@ struct Explanation<'a> {
     summary: &'a str,
     message_formats: &'a [&'a str],
     fix: String,
+    #[allow(clippy::struct_field_names)]
     explanation: Option<&'a str>,
     preview: bool,
 }

crates/ruff/src/commands/show_files.rs

@@ -7,17 +7,17 @@ use itertools::Itertools;
 use ruff_linter::warn_user_once;
 use ruff_workspace::resolver::{python_files_in_path, PyprojectConfig, ResolvedFile};
 
-use crate::args::CliOverrides;
+use crate::args::ConfigArguments;
 
 /// Show the list of files to be checked based on current settings.
 pub(crate) fn show_files(
     files: &[PathBuf],
     pyproject_config: &PyprojectConfig,
-    overrides: &CliOverrides,
+    config_arguments: &ConfigArguments,
     writer: &mut impl Write,
 ) -> Result<()> {
     // Collect all files in the hierarchy.
-    let (paths, _resolver) = python_files_in_path(files, pyproject_config, overrides)?;
+    let (paths, _resolver) = python_files_in_path(files, pyproject_config, config_arguments)?;
 
     if paths.is_empty() {
         warn_user_once!("No Python files found under the given path(s)");

crates/ruff/src/commands/show_settings.rs

@@ -6,17 +6,17 @@ use itertools::Itertools;
 
 use ruff_workspace::resolver::{python_files_in_path, PyprojectConfig, ResolvedFile};
 
-use crate::args::CliOverrides;
+use crate::args::ConfigArguments;
 
 /// Print the user-facing configuration settings.
 pub(crate) fn show_settings(
     files: &[PathBuf],
     pyproject_config: &PyprojectConfig,
-    overrides: &CliOverrides,
+    config_arguments: &ConfigArguments,
     writer: &mut impl Write,
 ) -> Result<()> {
     // Collect all files in the hierarchy.
-    let (paths, resolver) = python_files_in_path(files, pyproject_config, overrides)?;
+    let (paths, resolver) = python_files_in_path(files, pyproject_config, config_arguments)?;
 
     // Print the list of files.
     let Some(path) = paths
@@ -29,13 +29,13 @@ pub(crate) fn show_settings(
         bail!("No files found under the given path");
     };
 
-    let settings = resolver.resolve(&path, pyproject_config);
+    let settings = resolver.resolve(&path);
 
-    writeln!(writer, "Resolved settings for: {path:?}")?;
+    writeln!(writer, "Resolved settings for: \"{}\"", path.display())?;
     if let Some(settings_path) = pyproject_config.path.as_ref() {
-        writeln!(writer, "Settings path: {settings_path:?}")?;
+        writeln!(writer, "Settings path: \"{}\"", settings_path.display())?;
     }
-    writeln!(writer, "{settings:#?}")?;
+    write!(writer, "{settings}")?;
 
     Ok(())
 }

crates/ruff/src/commands/snapshots/ruff__commands__check__test__E902_E902.py.snap

@@ -1,5 +1,5 @@
 ---
-source: crates/ruff_cli/src/commands/check.rs
+source: crates/ruff/src/commands/check.rs
 ---
 /home/ferris/project/code.py:1:1: E902 Permission denied (os error 13)
 /home/ferris/project/notebook.ipynb:1:1: E902 Permission denied (os error 13)

crates/ruff/src/diagnostics.rs

@@ -1,5 +1,6 @@
 #![cfg_attr(target_family = "wasm", allow(dead_code))]
 
+use std::borrow::Cow;
 use std::fs::File;
 use std::io;
 use std::ops::{Add, AddAssign};
@@ -10,24 +11,25 @@ use colored::Colorize;
 use log::{debug, error, warn};
 use rustc_hash::FxHashMap;
 
-use crate::cache::{Cache, FileCacheKey, LintCacheData};
 use ruff_diagnostics::Diagnostic;
 use ruff_linter::linter::{lint_fix, lint_only, FixTable, FixerResult, LinterResult, ParseSource};
 use ruff_linter::logging::DisplayParseError;
 use ruff_linter::message::Message;
 use ruff_linter::pyproject_toml::lint_pyproject_toml;
 use ruff_linter::registry::AsRule;
-use ruff_linter::settings::types::{ExtensionMapping, UnsafeFixes};
+use ruff_linter::settings::types::UnsafeFixes;
 use ruff_linter::settings::{flags, LinterSettings};
 use ruff_linter::source_kind::{SourceError, SourceKind};
 use ruff_linter::{fs, IOError, SyntaxError};
 use ruff_notebook::{Notebook, NotebookError, NotebookIndex};
 use ruff_python_ast::imports::ImportMap;
 use ruff_python_ast::{PySourceType, SourceType, TomlSourceType};
-use ruff_source_file::{LineIndex, SourceCode, SourceFileBuilder};
+use ruff_source_file::SourceFileBuilder;
 use ruff_text_size::{TextRange, TextSize};
 use ruff_workspace::Settings;
 
+use crate::cache::{Cache, FileCacheKey, LintCacheData};
+
 #[derive(Debug, Default, PartialEq)]
 pub(crate) struct Diagnostics {
     pub(crate) messages: Vec<Message>,
@@ -177,11 +179,6 @@ impl AddAssign for FixMap {
     }
 }
 
-fn override_source_type(path: Option<&Path>, extension: &ExtensionMapping) -> Option<PySourceType> {
-    let ext = path?.extension()?.to_str()?;
-    extension.get(ext).map(PySourceType::from)
-}
-
 /// Lint the source code at the given `Path`.
 pub(crate) fn lint_path(
     path: &Path,
@@ -226,7 +223,7 @@ pub(crate) fn lint_path(
 
     debug!("Checking: {}", path.display());
 
-    let source_type = match override_source_type(Some(path), &settings.extension) {
+    let source_type = match settings.extension.get(path).map(PySourceType::from) {
         Some(source_type) => source_type,
         None => match SourceType::from(path) {
             SourceType::Toml(TomlSourceType::Pyproject) => {
@@ -272,6 +269,7 @@ pub(crate) fn lint_path(
             data: (messages, imports),
             error: parse_error,
         },
+        transformed,
         fixed,
     ) = if matches!(fix_mode, flags::FixMode::Apply | flags::FixMode::Diff) {
         if let Ok(FixerResult {
@@ -300,7 +298,12 @@ pub(crate) fn lint_path(
                     flags::FixMode::Generate => {}
                 }
             }
-            (result, fixed)
+            let transformed = if let Cow::Owned(transformed) = transformed {
+                transformed
+            } else {
+                source_kind
+            };
+            (result, transformed, fixed)
         } else {
             // If we fail to fix, lint the original source code.
             let result = lint_only(
@@ -312,8 +315,9 @@ pub(crate) fn lint_path(
                 source_type,
                 ParseSource::None,
             );
+            let transformed = source_kind;
             let fixed = FxHashMap::default();
-            (result, fixed)
+            (result, transformed, fixed)
         }
     } else {
         let result = lint_only(
@@ -325,8 +329,9 @@ pub(crate) fn lint_path(
             source_type,
             ParseSource::None,
         );
+        let transformed = source_kind;
         let fixed = FxHashMap::default();
-        (result, fixed)
+        (result, transformed, fixed)
     };
 
     let imports = imports.unwrap_or_default();
@@ -334,7 +339,7 @@ pub(crate) fn lint_path(
     if let Some((cache, relative_path, key)) = caching {
         // We don't cache parsing errors.
         if parse_error.is_none() {
-            // `FixMode::Generate` and `FixMode::Diff` rely on side-effects (writing to disk,
+            // `FixMode::Apply` and `FixMode::Diff` rely on side-effects (writing to disk,
             // and writing the diff to stdout, respectively). If a file has diagnostics, we
             // need to avoid reading from and writing to the cache in these modes.
             if match fix_mode {
@@ -349,28 +354,21 @@ pub(crate) fn lint_path(
                     LintCacheData::from_messages(
                         &messages,
                         imports.clone(),
-                        source_kind.as_ipy_notebook().map(Notebook::index).cloned(),
+                        transformed.as_ipy_notebook().map(Notebook::index).cloned(),
                     ),
                 );
             }
         }
     }
 
-    if let Some(err) = parse_error {
+    if let Some(error) = parse_error {
         error!(
             "{}",
-            DisplayParseError::new(
-                err,
-                SourceCode::new(
-                    source_kind.source_code(),
-                    &LineIndex::from_source_text(source_kind.source_code())
-                ),
-                &source_kind,
-            )
+            DisplayParseError::from_source_kind(error, Some(path.to_path_buf()), &transformed)
         );
     }
 
-    let notebook_indexes = if let SourceKind::IpyNotebook(notebook) = source_kind {
+    let notebook_indexes = if let SourceKind::IpyNotebook(notebook) = transformed {
         FxHashMap::from_iter([(path.to_string_lossy().to_string(), notebook.into_index())])
     } else {
         FxHashMap::default()
@@ -395,15 +393,14 @@ pub(crate) fn lint_stdin(
     fix_mode: flags::FixMode,
 ) -> Result<Diagnostics> {
     // TODO(charlie): Support `pyproject.toml`.
-    let source_type = if let Some(source_type) =
-        override_source_type(path, &settings.linter.extension)
-    {
-        source_type
-    } else {
-        let SourceType::Python(source_type) = path.map(SourceType::from).unwrap_or_default() else {
-            return Ok(Diagnostics::default());
-        };
-        source_type
+    let source_type = match path.and_then(|path| settings.linter.extension.get(path)) {
+        None => match path.map(SourceType::from).unwrap_or_default() {
+            SourceType::Python(source_type) => source_type,
+            SourceType::Toml(_) => {
+                return Ok(Diagnostics::default());
+            }
+        },
+        Some(language) => PySourceType::from(language),
     };
 
     // Extract the sources from the file.
@@ -421,6 +418,7 @@ pub(crate) fn lint_stdin(
             data: (messages, imports),
             error: parse_error,
         },
+        transformed,
         fixed,
     ) = if matches!(fix_mode, flags::FixMode::Apply | flags::FixMode::Diff) {
         if let Ok(FixerResult {
@@ -449,8 +447,12 @@ pub(crate) fn lint_stdin(
                 }
                 flags::FixMode::Generate => {}
             }
-
-            (result, fixed)
+            let transformed = if let Cow::Owned(transformed) = transformed {
+                transformed
+            } else {
+                source_kind
+            };
+            (result, transformed, fixed)
         } else {
             // If we fail to fix, lint the original source code.
             let result = lint_only(
@@ -462,14 +464,15 @@ pub(crate) fn lint_stdin(
                 source_type,
                 ParseSource::None,
             );
-            let fixed = FxHashMap::default();
 
             // Write the contents to stdout anyway.
             if fix_mode.is_apply() {
                 source_kind.write(&mut io::stdout().lock())?;
             }
 
-            (result, fixed)
+            let transformed = source_kind;
+            let fixed = FxHashMap::default();
+            (result, transformed, fixed)
         }
     } else {
         let result = lint_only(
@@ -481,20 +484,21 @@ pub(crate) fn lint_stdin(
             source_type,
             ParseSource::None,
         );
+        let transformed = source_kind;
         let fixed = FxHashMap::default();
-        (result, fixed)
+        (result, transformed, fixed)
     };
 
     let imports = imports.unwrap_or_default();
 
-    if let Some(err) = parse_error {
+    if let Some(error) = parse_error {
         error!(
-            "Failed to parse {}: {err}",
-            path.map_or_else(|| "-".into(), fs::relativize_path).bold()
+            "{}",
+            DisplayParseError::from_source_kind(error, path.map(Path::to_path_buf), &transformed)
         );
     }
 
-    let notebook_indexes = if let SourceKind::IpyNotebook(notebook) = source_kind {
+    let notebook_indexes = if let SourceKind::IpyNotebook(notebook) = transformed {
         FxHashMap::from_iter([(
             path.map_or_else(|| "-".into(), |path| path.to_string_lossy().to_string()),
             notebook.into_index(),

crates/ruff/src/lib.rs

@@ -204,24 +204,23 @@ pub fn run(
 }
 
 fn format(args: FormatCommand, log_level: LogLevel) -> Result<ExitStatus> {
-    let (cli, overrides) = args.partition();
+    let (cli, config_arguments) = args.partition()?;
 
     if is_stdin(&cli.files, cli.stdin_filename.as_deref()) {
-        commands::format_stdin::format_stdin(&cli, &overrides)
+        commands::format_stdin::format_stdin(&cli, &config_arguments)
     } else {
-        commands::format::format(cli, &overrides, log_level)
+        commands::format::format(cli, &config_arguments, log_level)
     }
 }
 
 pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
-    let (cli, overrides) = args.partition();
+    let (cli, config_arguments) = args.partition()?;
 
     // Construct the "default" settings. These are used when no `pyproject.toml`
     // files are present, or files are injected from outside of the hierarchy.
     let pyproject_config = resolve::resolve(
         cli.isolated,
-        cli.config.as_deref(),
-        &overrides,
+        &config_arguments,
         cli.stdin_filename.as_deref(),
     )?;
 
@@ -239,11 +238,21 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
     let files = resolve_default_files(cli.files, is_stdin);
 
     if cli.show_settings {
-        commands::show_settings::show_settings(&files, &pyproject_config, &overrides, &mut writer)?;
+        commands::show_settings::show_settings(
+            &files,
+            &pyproject_config,
+            &config_arguments,
+            &mut writer,
+        )?;
         return Ok(ExitStatus::Success);
     }
     if cli.show_files {
-        commands::show_files::show_files(&files, &pyproject_config, &overrides, &mut writer)?;
+        commands::show_files::show_files(
+            &files,
+            &pyproject_config,
+            &config_arguments,
+            &mut writer,
+        )?;
         return Ok(ExitStatus::Success);
     }
 
@@ -255,7 +264,6 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
         unsafe_fixes,
         output_format,
         show_fixes,
-        show_source,
         ..
     } = pyproject_config.settings;
 
@@ -284,9 +292,6 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
     if show_fixes {
         printer_flags |= PrinterFlags::SHOW_FIX_SUMMARY;
     }
-    if show_source {
-        printer_flags |= PrinterFlags::SHOW_SOURCE;
-    }
     if cli.ecosystem_ci {
         warn_user!(
             "The formatting of fixes emitted by this option is a work-in-progress, subject to \
@@ -306,7 +311,8 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
         if !fix_mode.is_generate() {
             warn_user!("--fix is incompatible with --add-noqa.");
         }
-        let modifications = commands::add_noqa::add_noqa(&files, &pyproject_config, &overrides)?;
+        let modifications =
+            commands::add_noqa::add_noqa(&files, &pyproject_config, &config_arguments)?;
         if modifications > 0 && log_level >= LogLevel::Default {
             let s = if modifications == 1 { "" } else { "s" };
             #[allow(clippy::print_stderr)]
@@ -325,9 +331,18 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
         printer_flags,
     );
 
+    // the settings should already be combined with the CLI overrides at this point
+    // TODO(jane): let's make this `PreviewMode`
+    // TODO: this should reference the global preview mode once https://github.com/astral-sh/ruff/issues/8232
+    //   is resolved.
+    let preview = pyproject_config.settings.linter.preview.is_enabled();
+
     if cli.watch {
-        if output_format != SerializationFormat::Text {
-            warn_user!("`--output-format text` is always used in watch mode.");
+        if output_format != SerializationFormat::default(preview) {
+            warn_user!(
+                "`--output-format {}` is always used in watch mode.",
+                SerializationFormat::default(preview)
+            );
         }
 
         // Configure the file watcher.
@@ -347,13 +362,13 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
         let messages = commands::check::check(
             &files,
             &pyproject_config,
-            &overrides,
+            &config_arguments,
             cache.into(),
             noqa.into(),
             fix_mode,
             unsafe_fixes,
         )?;
-        printer.write_continuously(&mut writer, &messages)?;
+        printer.write_continuously(&mut writer, &messages, preview)?;
 
         // In watch mode, we may need to re-resolve the configuration.
         // TODO(charlie): Re-compute other derivative values, like the `printer`.
@@ -369,8 +384,7 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
                     if matches!(change_kind, ChangeKind::Configuration) {
                         pyproject_config = resolve::resolve(
                             cli.isolated,
-                            cli.config.as_deref(),
-                            &overrides,
+                            &config_arguments,
                             cli.stdin_filename.as_deref(),
                         )?;
                     }
@@ -380,13 +394,13 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
                     let messages = commands::check::check(
                         &files,
                         &pyproject_config,
-                        &overrides,
+                        &config_arguments,
                         cache.into(),
                         noqa.into(),
                         fix_mode,
                         unsafe_fixes,
                     )?;
-                    printer.write_continuously(&mut writer, &messages)?;
+                    printer.write_continuously(&mut writer, &messages, preview)?;
                 }
                 Err(err) => return Err(err.into()),
             }
@@ -397,7 +411,7 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
             commands::check_stdin::check_stdin(
                 cli.stdin_filename.map(fs::normalize_path).as_deref(),
                 &pyproject_config,
-                &overrides,
+                &config_arguments,
                 noqa.into(),
                 fix_mode,
             )?
@@ -405,7 +419,7 @@ pub fn check(args: CheckCommand, log_level: LogLevel) -> Result<ExitStatus> {
             commands::check::check(
                 &files,
                 &pyproject_config,
-                &overrides,
+                &config_arguments,
                 cache.into(),
                 noqa.into(),
                 fix_mode,

crates/ruff/src/main.rs

@@ -3,8 +3,8 @@ use std::process::ExitCode;
 use clap::{Parser, Subcommand};
 use colored::Colorize;
 
-use ruff_cli::args::{Args, Command};
-use ruff_cli::{run, ExitStatus};
+use ruff::args::{Args, Command};
+use ruff::{run, ExitStatus};
 
 #[cfg(target_os = "windows")]
 #[global_allocator]

crates/ruff/src/printer.rs

@@ -27,8 +27,6 @@ bitflags! {
     pub(crate) struct Flags: u8 {
         /// Whether to show violations when emitting diagnostics.
         const SHOW_VIOLATIONS = 0b0000_0001;
-        /// Whether to show the source code when emitting diagnostics.
-        const SHOW_SOURCE = 0b000_0010;
         /// Whether to show a summary of the fixed violations when emitting diagnostics.
         const SHOW_FIX_SUMMARY = 0b0000_0100;
         /// Whether to show a diff of each fixed violation when emitting diagnostics.
@@ -218,7 +216,10 @@ impl Printer {
         if !self.flags.intersects(Flags::SHOW_VIOLATIONS) {
             if matches!(
                 self.format,
-                SerializationFormat::Text | SerializationFormat::Grouped
+                SerializationFormat::Text
+                    | SerializationFormat::Full
+                    | SerializationFormat::Concise
+                    | SerializationFormat::Grouped
             ) {
                 if self.flags.intersects(Flags::SHOW_FIX_SUMMARY) {
                     if !diagnostics.fixed.is_empty() {
@@ -245,11 +246,12 @@ impl Printer {
             SerializationFormat::Junit => {
                 JunitEmitter.emit(writer, &diagnostics.messages, &context)?;
             }
-            SerializationFormat::Text => {
+            SerializationFormat::Concise
+            | SerializationFormat::Full => {
                 TextEmitter::default()
                     .with_show_fix_status(show_fix_status(self.fix_mode, fixables.as_ref()))
                     .with_show_fix_diff(self.flags.intersects(Flags::SHOW_FIX_DIFF))
-                    .with_show_source(self.flags.intersects(Flags::SHOW_SOURCE))
+                    .with_show_source(self.format == SerializationFormat::Full)
                     .with_unsafe_fixes(self.unsafe_fixes)
                     .emit(writer, &diagnostics.messages, &context)?;
 
@@ -265,7 +267,6 @@ impl Printer {
             }
             SerializationFormat::Grouped => {
                 GroupedEmitter::default()
-                    .with_show_source(self.flags.intersects(Flags::SHOW_SOURCE))
                     .with_show_fix_status(show_fix_status(self.fix_mode, fixables.as_ref()))
                     .with_unsafe_fixes(self.unsafe_fixes)
                     .emit(writer, &diagnostics.messages, &context)?;
@@ -294,6 +295,7 @@ impl Printer {
             SerializationFormat::Sarif => {
                 SarifEmitter.emit(writer, &diagnostics.messages, &context)?;
             }
+            SerializationFormat::Text => unreachable!("Text is deprecated and should have been automatically converted to the default serialization format")
         }
 
         writer.flush()?;
@@ -342,7 +344,9 @@ impl Printer {
         }
 
         match self.format {
-            SerializationFormat::Text => {
+            SerializationFormat::Text
+            | SerializationFormat::Full
+            | SerializationFormat::Concise => {
                 // Compute the maximum number of digits in the count and code, for all messages,
                 // to enable pretty-printing.
                 let count_width = num_digits(
@@ -403,6 +407,7 @@ impl Printer {
         &self,
         writer: &mut dyn Write,
         diagnostics: &Diagnostics,
+        preview: bool,
     ) -> Result<()> {
         if matches!(self.log_level, LogLevel::Silent) {
             return Ok(());
@@ -430,7 +435,7 @@ impl Printer {
             let context = EmitterContext::new(&diagnostics.notebook_indexes);
             TextEmitter::default()
                 .with_show_fix_status(show_fix_status(self.fix_mode, fixables.as_ref()))
-                .with_show_source(self.flags.intersects(Flags::SHOW_SOURCE))
+                .with_show_source(preview)
                 .with_unsafe_fixes(self.unsafe_fixes)
                 .emit(writer, &diagnostics.messages, &context)?;
         }

crates/ruff/src/resolve.rs

@@ -11,19 +11,18 @@ use ruff_workspace::resolver::{
     Relativity,
 };
 
-use crate::args::CliOverrides;
+use crate::args::ConfigArguments;
 
 /// Resolve the relevant settings strategy and defaults for the current
 /// invocation.
 pub fn resolve(
     isolated: bool,
-    config: Option<&Path>,
-    overrides: &CliOverrides,
+    config_arguments: &ConfigArguments,
     stdin_filename: Option<&Path>,
 ) -> Result<PyprojectConfig> {
     // First priority: if we're running in isolated mode, use the default settings.
     if isolated {
-        let config = overrides.transform(Configuration::default());
+        let config = config_arguments.transform(Configuration::default());
         let settings = config.into_settings(&path_dedot::CWD)?;
         debug!("Isolated mode, not reading any pyproject.toml");
         return Ok(PyprojectConfig::new(
@@ -36,12 +35,13 @@ pub fn resolve(
     // Second priority: the user specified a `pyproject.toml` file. Use that
     // `pyproject.toml` for _all_ configuration, and resolve paths relative to the
     // current working directory. (This matches ESLint's behavior.)
-    if let Some(pyproject) = config
+    if let Some(pyproject) = config_arguments
+        .config_file()
         .map(|config| config.display().to_string())
         .map(|config| shellexpand::full(&config).map(|config| PathBuf::from(config.as_ref())))
         .transpose()?
     {
-        let settings = resolve_root_settings(&pyproject, Relativity::Cwd, overrides)?;
+        let settings = resolve_root_settings(&pyproject, Relativity::Cwd, config_arguments)?;
         debug!(
             "Using user-specified configuration file at: {}",
             pyproject.display()
@@ -67,7 +67,7 @@ pub fn resolve(
             "Using configuration file (via parent) at: {}",
             pyproject.display()
         );
-        let settings = resolve_root_settings(&pyproject, Relativity::Parent, overrides)?;
+        let settings = resolve_root_settings(&pyproject, Relativity::Parent, config_arguments)?;
         return Ok(PyprojectConfig::new(
             PyprojectDiscoveryStrategy::Hierarchical,
             settings,
@@ -84,7 +84,7 @@ pub fn resolve(
             "Using configuration file (via cwd) at: {}",
             pyproject.display()
         );
-        let settings = resolve_root_settings(&pyproject, Relativity::Cwd, overrides)?;
+        let settings = resolve_root_settings(&pyproject, Relativity::Cwd, config_arguments)?;
         return Ok(PyprojectConfig::new(
             PyprojectDiscoveryStrategy::Hierarchical,
             settings,
@@ -97,7 +97,7 @@ pub fn resolve(
     // "closest" `pyproject.toml` file for every Python file later on, so these act
     // as the "default" settings.)
     debug!("Using Ruff default settings");
-    let config = overrides.transform(Configuration::default());
+    let config = config_arguments.transform(Configuration::default());
     let settings = config.into_settings(&path_dedot::CWD)?;
     Ok(PyprojectConfig::new(
         PyprojectDiscoveryStrategy::Hierarchical,

crates/ruff/src/snapshots/ruff__version__tests__version_formatting.snap

@@ -0,0 +1,5 @@
+---
+source: crates/ruff/src/version.rs
+expression: version
+---
+0.0.0

crates/ruff/src/snapshots/ruff__version__tests__version_formatting_with_commit_info.snap

@@ -1,5 +1,5 @@
 ---
-source: crates/ruff_cli/src/version.rs
+source: crates/ruff/src/version.rs
 expression: version
 ---
 0.0.0 (53b0f5d92 2023-10-19)

crates/ruff/src/snapshots/ruff__version__tests__version_formatting_with_commits_since_last_tag.snap

@@ -1,5 +1,5 @@
 ---
-source: crates/ruff_cli/src/version.rs
+source: crates/ruff/src/version.rs
 expression: version
 ---
 0.0.0+24 (53b0f5d92 2023-10-19)

crates/ruff/src/snapshots/ruff__version__tests__version_serializable.snap

@@ -1,5 +1,5 @@
 ---
-source: crates/ruff_cli/src/version.rs
+source: crates/ruff/src/version.rs
 expression: version
 ---
 {

crates/ruff/tests/deprecation.rs

@@ -0,0 +1,149 @@
+//! A test suite that ensures deprecated command line options have appropriate warnings / behaviors
+
+use ruff_linter::settings::types::SerializationFormat;
+use std::process::Command;
+
+use insta_cmd::{assert_cmd_snapshot, get_cargo_bin};
+
+const BIN_NAME: &str = "ruff";
+
+const STDIN: &str = "l = 1";
+
+fn ruff_check(show_source: Option<bool>, output_format: Option<String>) -> Command {
+    let mut cmd = Command::new(get_cargo_bin(BIN_NAME));
+    let output_format = output_format.unwrap_or(format!("{}", SerializationFormat::default(false)));
+    cmd.arg("--output-format");
+    cmd.arg(output_format);
+    cmd.arg("--no-cache");
+    match show_source {
+        Some(true) => {
+            cmd.arg("--show-source");
+        }
+        Some(false) => {
+            cmd.arg("--no-show-source");
+        }
+        None => {}
+    }
+    cmd.arg("-");
+
+    cmd
+}
+
+#[test]
+fn ensure_show_source_is_deprecated() {
+    assert_cmd_snapshot!(ruff_check(Some(true), None).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--show-source` argument is deprecated and has been ignored in favor of `--output-format=concise`.
+    "###);
+}
+
+#[test]
+fn ensure_no_show_source_is_deprecated() {
+    assert_cmd_snapshot!(ruff_check(Some(false), None).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--no-show-source` argument is deprecated and has been ignored in favor of `--output-format=concise`.
+    "###);
+}
+
+#[test]
+fn ensure_output_format_is_deprecated() {
+    assert_cmd_snapshot!(ruff_check(None, Some("text".into())).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: `--output-format=text` is deprecated. Use `--output-format=full` or `--output-format=concise` instead. `text` will be treated as `concise`.
+    "###);
+}
+
+#[test]
+fn ensure_output_format_overrides_show_source() {
+    assert_cmd_snapshot!(ruff_check(Some(true), Some("concise".into())).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--show-source` argument is deprecated and has been ignored in favor of `--output-format=concise`.
+    "###);
+}
+
+#[test]
+fn ensure_full_output_format_overrides_no_show_source() {
+    assert_cmd_snapshot!(ruff_check(Some(false), Some("full".into())).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+      |
+    1 | l = 1
+      | ^ E741
+      |
+
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--no-show-source` argument is deprecated and has been ignored in favor of `--output-format=full`.
+    "###);
+}
+
+#[test]
+fn ensure_output_format_uses_concise_over_no_show_source() {
+    assert_cmd_snapshot!(ruff_check(Some(false), Some("concise".into())).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--no-show-source` argument is deprecated and has been ignored in favor of `--output-format=concise`.
+    "###);
+}
+
+#[test]
+fn ensure_deprecated_output_format_overrides_show_source() {
+    assert_cmd_snapshot!(ruff_check(Some(true), Some("text".into())).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--show-source` argument is deprecated and has been ignored in favor of `--output-format=text`.
+    warning: `--output-format=text` is deprecated. Use `--output-format=full` or `--output-format=concise` instead. `text` will be treated as `concise`.
+    "###);
+}
+
+#[test]
+fn ensure_deprecated_output_format_overrides_no_show_source() {
+    assert_cmd_snapshot!(ruff_check(Some(false), Some("text".into())).pass_stdin(STDIN), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:1: E741 Ambiguous variable name: `l`
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The `--no-show-source` argument is deprecated and has been ignored in favor of `--output-format=text`.
+    warning: `--output-format=text` is deprecated. Use `--output-format=full` or `--output-format=concise` instead. `text` will be treated as `concise`.
+    "###);
+}

crates/ruff/tests/format.rs

@@ -90,6 +90,179 @@ fn format_warn_stdin_filename_with_files() {
     "###);
 }
 
+#[test]
+fn nonexistent_config_file() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--config", "foo.toml", "."]), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'foo.toml' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    It looks like you were trying to pass a path to a configuration file.
+    The path `foo.toml` does not exist
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn config_override_rejected_if_invalid_toml() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--config", "foo = bar", "."]), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'foo = bar' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    The supplied argument is not valid TOML:
+
+    TOML parse error at line 1, column 7
+      |
+    1 | foo = bar
+      |       ^
+    invalid string
+    expected `"`, `'`
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn too_many_config_files() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_dot_toml = tempdir.path().join("ruff.toml");
+    let ruff2_dot_toml = tempdir.path().join("ruff2.toml");
+    fs::File::create(&ruff_dot_toml)?;
+    fs::File::create(&ruff2_dot_toml)?;
+    let expected_stderr = format!(
+        "\
+ruff failed
+  Cause: You cannot specify more than one configuration file on the command line.
+
+  tip: remove either `--config={}` or `--config={}`.
+       For more information, try `--help`.
+
+",
+        ruff_dot_toml.display(),
+        ruff2_dot_toml.display(),
+    );
+    let cmd = Command::new(get_cargo_bin(BIN_NAME))
+        .arg("format")
+        .arg("--config")
+        .arg(&ruff_dot_toml)
+        .arg("--config")
+        .arg(&ruff2_dot_toml)
+        .arg(".")
+        .output()?;
+    let stderr = std::str::from_utf8(&cmd.stderr)?;
+    assert_eq!(stderr, expected_stderr);
+    Ok(())
+}
+
+#[test]
+fn config_file_and_isolated() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_dot_toml = tempdir.path().join("ruff.toml");
+    fs::File::create(&ruff_dot_toml)?;
+    let expected_stderr = format!(
+        "\
+ruff failed
+  Cause: The argument `--config={}` cannot be used with `--isolated`
+
+  tip: You cannot specify a configuration file and also specify `--isolated`,
+       as `--isolated` causes ruff to ignore all configuration files.
+       For more information, try `--help`.
+
+",
+        ruff_dot_toml.display(),
+    );
+    let cmd = Command::new(get_cargo_bin(BIN_NAME))
+        .arg("format")
+        .arg("--config")
+        .arg(&ruff_dot_toml)
+        .arg("--isolated")
+        .arg(".")
+        .output()?;
+    let stderr = std::str::from_utf8(&cmd.stderr)?;
+    assert_eq!(stderr, expected_stderr);
+    Ok(())
+}
+
+#[test]
+fn config_override_via_cli() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(&ruff_toml, "line-length = 100")?;
+    let fixture = r#"
+def foo():
+    print("looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong string")
+
+    "#;
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .arg("format")
+        .arg("--config")
+        .arg(&ruff_toml)
+        // This overrides the long line length set in the config file
+        .args(["--config", "line-length=80"])
+        .arg("-")
+        .pass_stdin(fixture), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    def foo():
+        print(
+            "looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong string"
+        )
+
+    ----- stderr -----
+    "###);
+    Ok(())
+}
+
+#[test]
+fn config_doubly_overridden_via_cli() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(&ruff_toml, "line-length = 70")?;
+    let fixture = r#"
+def foo():
+    print("looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong string")
+
+    "#;
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .arg("format")
+        .arg("--config")
+        .arg(&ruff_toml)
+        // This overrides the long line length set in the config file...
+        .args(["--config", "line-length=80"])
+        // ...but this overrides them both:
+        .args(["--line-length", "100"])
+        .arg("-")
+        .pass_stdin(fixture), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    def foo():
+        print("looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong string")
+
+    ----- stderr -----
+    "###);
+    Ok(())
+}
+
 #[test]
 fn format_options() -> Result<()> {
     let tempdir = TempDir::new()?;
@@ -328,6 +501,32 @@ OTHER = "OTHER"
     Ok(())
 }
 
+#[test]
+fn syntax_error() -> Result<()> {
+    let tempdir = TempDir::new()?;
+
+    fs::write(
+        tempdir.path().join("main.py"),
+        r#"
+from module import =
+"#,
+    )?;
+
+    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: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to parse main.py:2:20: Unexpected token '='
+    "###);
+
+    Ok(())
+}
+
 #[test]
 fn messages() -> Result<()> {
     let tempdir = TempDir::new()?;
@@ -482,6 +681,9 @@ if __name__ == '__main__':
         say_hy("dear Ruff contributor")
 
     ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+      - 'ignore' -> 'lint.ignore'
     "###);
     Ok(())
 }
@@ -520,6 +722,9 @@ if __name__ == '__main__':
         say_hy("dear Ruff contributor")
 
     ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+      - 'ignore' -> 'lint.ignore'
     "###);
     Ok(())
 }
@@ -646,7 +851,8 @@ format = "json"
 
         ----- stderr -----
         ruff failed
-          Cause: Failed to parse `[RUFF-TOML-PATH]`: TOML parse error at line 2, column 10
+          Cause: Failed to parse [RUFF-TOML-PATH]
+          Cause: TOML parse error at line 2, column 10
           |
         2 | format = "json"
           |          ^^^^^^
@@ -1441,3 +1647,392 @@ fn test_notebook_trailing_semicolon() {
     ----- stderr -----
     "###);
 }
+
+#[test]
+fn extension() -> Result<()> {
+    let tempdir = TempDir::new()?;
+
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+include = ["*.ipy"]
+"#,
+    )?;
+
+    fs::write(
+        tempdir.path().join("main.ipy"),
+        r#"
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ad6f36d9-4b7d-4562-8d00-f15a0f1fbb6d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "x=1"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
+"#,
+    )?;
+
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .arg("format")
+        .arg("--no-cache")
+        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
+        .args(["--extension", "ipy:ipynb"])
+        .arg("."), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    1 file reformatted
+
+    ----- stderr -----
+    "###);
+    Ok(())
+}
+
+#[test]
+fn range_formatting() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=2:8-2:14"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Shouldn't format this" )
+
+"#), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    def foo(
+        arg1,
+        arg2,
+    ):
+        print("Shouldn't format this" )
+
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn range_formatting_unicode() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=2:21-3"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1="👋🏽" ): print("Format this" )
+"#), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    def foo(arg1="👋🏽" ):
+        print("Format this")
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn range_formatting_multiple_files() -> std::io::Result<()> {
+    let tempdir = TempDir::new()?;
+    let file1 = tempdir.path().join("file1.py");
+
+    fs::write(
+        &file1,
+        r#"
+def file1(arg1, arg2,):
+    print("Shouldn't format this" )
+
+"#,
+    )?;
+
+    let file2 = tempdir.path().join("file2.py");
+
+    fs::write(
+        &file2,
+        r#"
+def file2(arg1, arg2,):
+    print("Shouldn't format this" )
+
+"#,
+    )?;
+
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--range=1:8-1:15"])
+        .arg(file1)
+        .arg(file2),  @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    ruff failed
+      Cause: The `--range` option is only supported when formatting a single file but the specified paths resolve to 2 files.
+    "###);
+
+    Ok(())
+}
+
+#[test]
+fn range_formatting_out_of_bounds() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=100:40-200:1"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Shouldn't format this" )
+
+"#), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    def foo(arg1, arg2,):
+        print("Shouldn't format this" )
+
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn range_start_larger_than_end() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=90-50"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Shouldn't format this" )
+
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value '90-50' for '--range <RANGE>': the start position '90:1' is greater than the end position '50:1'.
+        tip: Try switching start and end: '50:1-90:1'
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn range_line_numbers_only() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=2-3"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Shouldn't format this" )
+
+"#), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    def foo(
+        arg1,
+        arg2,
+    ):
+        print("Shouldn't format this" )
+
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn range_start_only() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=3"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Should format this" )
+
+"#), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    def foo(arg1, arg2,):
+        print("Should format this")
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn range_end_only() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=-3"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Should format this" )
+
+"#), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    def foo(
+        arg1,
+        arg2,
+    ):
+        print("Should format this" )
+
+
+    ----- stderr -----
+    "###);
+}
+
+#[test]
+fn range_missing_line() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=1-:20"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Should format this" )
+
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value '1-:20' for '--range <RANGE>': the end line is not a valid number (cannot parse integer from empty string)
+      tip: The format is 'line:column'.
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn zero_line_number() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=0:2"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Should format this" )
+
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value '0:2' for '--range <RANGE>': the start line is 0, but it should be 1 or greater.
+      tip: The line numbers start at 1.
+      tip: Try 1:2 instead.
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn column_and_line_zero() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--stdin-filename", "test.py", "--range=0:0"])
+        .arg("-")
+        .pass_stdin(r#"
+def foo(arg1, arg2,):
+    print("Should format this" )
+
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value '0:0' for '--range <RANGE>': the start line and column are both 0, but they should be 1 or greater.
+      tip: The line and column numbers start at 1.
+      tip: Try 1:1 instead.
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn range_formatting_notebook() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(["format", "--isolated", "--no-cache", "--stdin-filename", "main.ipynb", "--range=1-2"])
+        .arg("-")
+        .pass_stdin(r#"
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ad6f36d9-4b7d-4562-8d00-f15a0f1fbb6d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "x=1"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Failed to format main.ipynb: Range formatting isn't supported for notebooks.
+    "###);
+}

crates/ruff/tests/lint.rs

@@ -0,0 +1,923 @@
+//! Tests the interaction of the `lint` configuration section
+
+#![cfg(not(target_family = "wasm"))]
+
+use regex::escape;
+use std::fs;
+use std::process::Command;
+use std::str;
+
+use anyhow::Result;
+use insta_cmd::{assert_cmd_snapshot, get_cargo_bin};
+use tempfile::TempDir;
+
+const BIN_NAME: &str = "ruff";
+const STDIN_BASE_OPTIONS: &[&str] = &["--no-cache", "--output-format", "concise"];
+
+fn tempdir_filter(tempdir: &TempDir) -> String {
+    format!(r"{}\\?/?", escape(tempdir.path().to_str().unwrap()))
+}
+
+#[test]
+fn top_level_options() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+extend-select = ["B", "Q"]
+
+[flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+        assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+            .args(STDIN_BASE_OPTIONS)
+            .arg("--config")
+            .arg(&ruff_toml)
+            .args(["--stdin-filename", "test.py"])
+            .arg("-")
+            .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
+        success: false
+        exit_code: 1
+        ----- stdout -----
+        test.py:1:5: Q000 [*] Double quotes found but single quotes preferred
+        test.py:1:5: B005 Using `.strip()` with multi-character strings is misleading
+        test.py:1:19: Q000 [*] Double quotes found but single quotes preferred
+        Found 3 errors.
+        [*] 2 fixable with the `--fix` option.
+
+        ----- stderr -----
+        warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `[TMP]/ruff.toml`:
+          - 'extend-select' -> 'lint.extend-select'
+          - 'flake8-quotes' -> 'lint.flake8-quotes'
+        "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn lint_options() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+[lint]
+extend-select = ["B", "Q"]
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:5: Q000 [*] Double quotes found but single quotes preferred
+    -:1:5: B005 Using `.strip()` with multi-character strings is misleading
+    -:1:19: Q000 [*] Double quotes found but single quotes preferred
+    Found 3 errors.
+    [*] 2 fixable with the `--fix` option.
+
+    ----- stderr -----
+    "###);
+    });
+
+    Ok(())
+}
+
+/// Tests that configurations from the top-level and `lint` section are merged together.
+#[test]
+fn mixed_levels() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+extend-select = ["B", "Q"]
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:5: Q000 [*] Double quotes found but single quotes preferred
+    -:1:5: B005 Using `.strip()` with multi-character strings is misleading
+    -:1:19: Q000 [*] Double quotes found but single quotes preferred
+    Found 3 errors.
+    [*] 2 fixable with the `--fix` option.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `[TMP]/ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+    "###);
+    });
+
+    Ok(())
+}
+
+/// Tests that options in the `lint` section have higher precedence than top-level options (because they are more specific).
+#[test]
+fn precedence() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+[lint]
+extend-select = ["B", "Q"]
+
+[flake8-quotes]
+inline-quotes = "double"
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:5: Q000 [*] Double quotes found but single quotes preferred
+    -:1:5: B005 Using `.strip()` with multi-character strings is misleading
+    -:1:19: Q000 [*] Double quotes found but single quotes preferred
+    Found 3 errors.
+    [*] 2 fixable with the `--fix` option.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `[TMP]/ruff.toml`:
+      - 'flake8-quotes' -> 'lint.flake8-quotes'
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn exclude() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+extend-select = ["B", "Q"]
+extend-exclude = ["out"]
+
+[lint]
+exclude = ["test.py", "generated.py"]
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    fs::write(
+        tempdir.path().join("main.py"),
+        r#"
+from test import say_hy
+
+if __name__ == "__main__":
+    say_hy("dear Ruff contributor")
+"#,
+    )?;
+
+    // Excluded file but passed to the CLI directly, should be linted
+    let test_path = tempdir.path().join("test.py");
+    fs::write(
+        &test_path,
+        r#"
+def say_hy(name: str):
+        print(f"Hy {name}")"#,
+    )?;
+
+    fs::write(
+        tempdir.path().join("generated.py"),
+        r#"NUMBERS = [
+     0,  1,  2,  3,  4,  5,  6,  7,  8,  9,
+    10, 11, 12, 13, 14, 15, 16, 17, 18, 19
+]
+OTHER = "OTHER"
+"#,
+    )?;
+
+    let out_dir = tempdir.path().join("out");
+    fs::create_dir(&out_dir)?;
+
+    fs::write(out_dir.join("a.py"), r#"a = "a""#)?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .arg("check")
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
+        // Explicitly pass test.py, should be linted regardless of it being excluded by lint.exclude
+        .arg(test_path.file_name().unwrap())
+        // Lint all other files in the directory, should respect the `exclude` and `lint.exclude` options
+        .arg("."), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    main.py:4:16: Q000 [*] Double quotes found but single quotes preferred
+    main.py:5:12: Q000 [*] Double quotes found but single quotes preferred
+    test.py:3:15: Q000 [*] Double quotes found but single quotes preferred
+    Found 3 errors.
+    [*] 3 fixable with the `--fix` option.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn exclude_stdin() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+extend-select = ["B", "Q"]
+
+[lint]
+exclude = ["generated.py"]
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .arg("check")
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
+        .args(["--stdin-filename", "generated.py"])
+        .arg("-")
+        .pass_stdin(r#"
+from test import say_hy
+
+if __name__ == "__main__":
+    say_hy("dear Ruff contributor")
+"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    generated.py:4:16: Q000 [*] Double quotes found but single quotes preferred
+    generated.py:5:12: Q000 [*] Double quotes found but single quotes preferred
+    Found 2 errors.
+    [*] 2 fixable with the `--fix` option.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn line_too_long_width_override() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+line-length = 80
+select = ["E501"]
+
+[pycodestyle]
+max-line-length = 100
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .args(["--stdin-filename", "test.py"])
+        .arg("-")
+        .pass_stdin(r#"
+# longer than 80, but less than 100
+_ = "---------------------------------------------------------------------------亜亜亜亜亜亜"
+# longer than 100
+_ = "---------------------------------------------------------------------------亜亜亜亜亜亜亜亜亜亜亜亜亜亜"
+"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    test.py:5:91: E501 Line too long (109 > 100)
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `[TMP]/ruff.toml`:
+      - 'select' -> 'lint.select'
+      - 'pycodestyle' -> 'lint.pycodestyle'
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn per_file_ignores_stdin() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+extend-select = ["B", "Q"]
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .arg("check")
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
+        .args(["--stdin-filename", "generated.py"])
+        .args(["--per-file-ignores", "generated.py:Q"])
+        .arg("-")
+        .pass_stdin(r#"
+import os
+
+from test import say_hy
+
+if __name__ == "__main__":
+    say_hy("dear Ruff contributor")
+"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    generated.py:2:8: F401 [*] `os` imported but unused
+    Found 1 error.
+    [*] 1 fixable with the `--fix` option.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn extend_per_file_ignores_stdin() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+extend-select = ["B", "Q"]
+
+[lint.flake8-quotes]
+inline-quotes = "single"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .arg("check")
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
+        .args(["--stdin-filename", "generated.py"])
+        .args(["--extend-per-file-ignores", "generated.py:Q"])
+        .arg("-")
+        .pass_stdin(r#"
+import os
+
+from test import say_hy
+
+if __name__ == "__main__":
+    say_hy("dear Ruff contributor")
+"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    generated.py:2:8: F401 [*] `os` imported but unused
+    Found 1 error.
+    [*] 1 fixable with the `--fix` option.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `ruff.toml`:
+      - 'extend-select' -> 'lint.extend-select'
+    "###);
+    });
+
+    Ok(())
+}
+
+/// Regression test for [#8858](https://github.com/astral-sh/ruff/issues/8858)
+#[test]
+fn parent_configuration_override() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let root_ruff = tempdir.path().join("ruff.toml");
+    fs::write(
+        root_ruff,
+        r#"
+[lint]
+select = ["ALL"]
+"#,
+    )?;
+
+    let sub_dir = tempdir.path().join("subdirectory");
+    fs::create_dir(&sub_dir)?;
+
+    let subdirectory_ruff = sub_dir.join("ruff.toml");
+    fs::write(
+        subdirectory_ruff,
+        r#"
+[lint]
+ignore = ["D203", "D212"]
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(sub_dir)
+        .arg("check")
+        .args(STDIN_BASE_OPTIONS)
+        , @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: No Python files found under the given path(s)
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn nonexistent_config_file() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", "foo.toml", "."]), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'foo.toml' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    It looks like you were trying to pass a path to a configuration file.
+    The path `foo.toml` does not exist
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn config_override_rejected_if_invalid_toml() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", "foo = bar", "."]), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'foo = bar' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    The supplied argument is not valid TOML:
+
+    TOML parse error at line 1, column 7
+      |
+    1 | foo = bar
+      |       ^
+    invalid string
+    expected `"`, `'`
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn too_many_config_files() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_dot_toml = tempdir.path().join("ruff.toml");
+    let ruff2_dot_toml = tempdir.path().join("ruff2.toml");
+    fs::File::create(&ruff_dot_toml)?;
+    fs::File::create(&ruff2_dot_toml)?;
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_dot_toml)
+        .arg("--config")
+        .arg(&ruff2_dot_toml)
+        .arg("."), @r###"
+        success: false
+        exit_code: 2
+        ----- stdout -----
+
+        ----- stderr -----
+        ruff failed
+          Cause: You cannot specify more than one configuration file on the command line.
+
+          tip: remove either `--config=[TMP]/ruff.toml` or `--config=[TMP]/ruff2.toml`.
+               For more information, try `--help`.
+
+        "###);
+    });
+    Ok(())
+}
+
+#[test]
+fn config_file_and_isolated() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_dot_toml = tempdir.path().join("ruff.toml");
+    fs::File::create(&ruff_dot_toml)?;
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_dot_toml)
+        .arg("--isolated")
+        .arg("."), @r###"
+        success: false
+        exit_code: 2
+        ----- stdout -----
+
+        ----- stderr -----
+        ruff failed
+          Cause: The argument `--config=[TMP]/ruff.toml` cannot be used with `--isolated`
+
+          tip: You cannot specify a configuration file and also specify `--isolated`,
+               as `--isolated` causes ruff to ignore all configuration files.
+               For more information, try `--help`.
+
+        "###);
+    });
+    Ok(())
+}
+
+#[test]
+fn config_override_via_cli() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+line-length = 100
+
+[lint]
+select = ["I"]
+
+[lint.isort]
+combine-as-imports = true
+        "#,
+    )?;
+    let fixture = r#"
+from foo import (
+    aaaaaaaaaaaaaaaaaaa,
+    bbbbbbbbbbb as bbbbbbbbbbbbbbbb,
+    cccccccccccccccc,
+    ddddddddddd as ddddddddddddd,
+    eeeeeeeeeeeeeee,
+    ffffffffffff as ffffffffffffff,
+    ggggggggggggg,
+    hhhhhhh as hhhhhhhhhhh,
+    iiiiiiiiiiiiii,
+    jjjjjjjjjjjjj as jjjjjj,
+)
+
+x = "longer_than_90_charactersssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss"
+"#;
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .args(["--config", "line-length=90"])
+        .args(["--config", "lint.extend-select=['E501', 'F841']"])
+        .args(["--config", "lint.isort.combine-as-imports = false"])
+        .arg("-")
+        .pass_stdin(fixture), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:2:1: I001 [*] Import block is un-sorted or un-formatted
+    -:15:91: E501 Line too long (97 > 90)
+    Found 2 errors.
+    [*] 1 fixable with the `--fix` option.
+
+    ----- stderr -----
+    "###);
+    Ok(())
+}
+
+#[test]
+fn valid_toml_but_nonexistent_option_provided_via_config_argument() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .args([".", "--config", "extend-select=['F481']"]),  // No such code as F481!
+        @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'extend-select=['F481']' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    Could not parse the supplied argument as a `ruff.toml` configuration option:
+
+    Unknown rule selector: `F481`
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn each_toml_option_requires_a_new_flag_1() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        // commas can't be used to delimit different config overrides;
+        // you need a new --config flag for each override
+        .args([".", "--config", "extend-select=['F841'], line-length=90"]),
+        @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'extend-select=['F841'], line-length=90' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    The supplied argument is not valid TOML:
+
+    TOML parse error at line 1, column 23
+      |
+    1 | extend-select=['F841'], line-length=90
+      |                       ^
+    expected newline, `#`
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn each_toml_option_requires_a_new_flag_2() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        // spaces *also* can't be used to delimit different config overrides;
+        // you need a new --config flag for each override
+        .args([".", "--config", "extend-select=['F841'] line-length=90"]),
+        @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: invalid value 'extend-select=['F841'] line-length=90' for '--config <CONFIG_OPTION>'
+
+      tip: A `--config` flag must either be a path to a `.toml` configuration file
+           or a TOML `<KEY> = <VALUE>` pair overriding a specific configuration
+           option
+
+    The supplied argument is not valid TOML:
+
+    TOML parse error at line 1, column 24
+      |
+    1 | extend-select=['F841'] line-length=90
+      |                        ^
+    expected newline, `#`
+
+    For more information, try '--help'.
+    "###);
+}
+
+#[test]
+fn config_doubly_overridden_via_cli() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+line-length = 100
+
+[lint]
+select=["E501"]
+"#,
+    )?;
+    let fixture = "x = 'longer_than_90_charactersssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss'";
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        // The --line-length flag takes priority over both the config file
+        // and the `--config="line-length=110"` flag,
+        // despite them both being specified after this flag on the command line:
+        .args(["--line-length", "90"])
+        .arg("--config")
+        .arg(&ruff_toml)
+        .args(["--config", "line-length=110"])
+        .arg("-")
+        .pass_stdin(fixture), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:91: E501 Line too long (97 > 90)
+    Found 1 error.
+
+    ----- stderr -----
+    "###);
+    Ok(())
+}
+
+#[test]
+fn complex_config_setting_overridden_via_cli() -> Result<()> {
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(&ruff_toml, "lint.select = ['N801']")?;
+    let fixture = "class violates_n801: pass";
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .args(["--config", "lint.per-file-ignores = {'generated.py' = ['N801']}"])
+        .args(["--stdin-filename", "generated.py"])
+        .arg("-")
+        .pass_stdin(fixture), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    "###);
+    Ok(())
+}
+
+#[test]
+fn deprecated_config_option_overridden_via_cli() {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", "select=['N801']", "-"])
+        .pass_stdin("class lowercase: ..."),
+        @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:1:7: N801 Class name `lowercase` should use CapWords convention 
+    Found 1 error.
+
+    ----- stderr -----
+    warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in your `--config` CLI arguments:
+      - 'select' -> 'lint.select'
+    "###);
+}
+
+#[test]
+fn extension() -> Result<()> {
+    let tempdir = TempDir::new()?;
+
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+include = ["*.ipy"]
+"#,
+    )?;
+
+    fs::write(
+        tempdir.path().join("main.ipy"),
+        r#"
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ad6f36d9-4b7d-4562-8d00-f15a0f1fbb6d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import os"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .current_dir(tempdir.path())
+        .arg("check")
+        .args(STDIN_BASE_OPTIONS)
+        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
+        .args(["--extension", "ipy:ipynb"])
+        .arg("."), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    main.ipy:cell 1:1:8: F401 [*] `os` imported but unused
+    Found 1 error.
+    [*] 1 fixable with the `--fix` option.
+
+    ----- stderr -----
+    "###);
+    });
+
+    Ok(())
+}

crates/ruff/tests/resolve_files.rs

@@ -39,6 +39,8 @@ fn check_project_include_defaults() {
         [BASEPATH]/include-test/subdirectory/c.py
 
         ----- stderr -----
+        warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `nested-project/pyproject.toml`:
+          - 'select' -> 'lint.select'
         "###);
     });
 }

crates/ruff/tests/show_settings.rs

@@ -0,0 +1,33 @@
+use insta_cmd::{assert_cmd_snapshot, get_cargo_bin};
+use std::path::Path;
+use std::process::Command;
+
+const BIN_NAME: &str = "ruff";
+
+#[test]
+fn display_default_settings() {
+    // Navigate from the crate directory to the workspace root.
+    let base_path = Path::new(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .unwrap()
+        .parent()
+        .unwrap();
+    let base_path = base_path.to_string_lossy();
+
+    // Escape the backslashes for the regex.
+    let base_path = regex::escape(&base_path);
+
+    #[cfg(not(target_os = "windows"))]
+    let test_filters = &[(base_path.as_ref(), "[BASEPATH]")];
+
+    #[cfg(target_os = "windows")]
+    let test_filters = &[
+        (base_path.as_ref(), "[BASEPATH]"),
+        (r#"\\+(\w\w|\s|\.|")"#, "/$1"),
+    ];
+
+    insta::with_settings!({ filters => test_filters.to_vec() }, {
+        assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+            .args(["check", "--show-settings", "unformatted.py"]).current_dir(Path::new("./resources/test/fixtures")));
+    });
+}

crates/ruff/tests/snapshots/integration_test__explain_status_codes_f401.snap

@@ -1,5 +1,5 @@
 ---
-source: crates/ruff_cli/tests/integration_test.rs
+source: crates/ruff/tests/integration_test.rs
 info:
   program: ruff
   args:
@@ -25,6 +25,15 @@ import cycles. They also increase the cognitive load of reading the code.
 If an import statement is used to check for the availability or existence
 of a module, consider using `importlib.util.find_spec` instead.
 
+If an import statement is used to re-export a symbol as part of a module's
+public interface, consider using a "redundant" import alias, which
+instructs Ruff (and other tools) to respect the re-export, and avoid
+marking it as unused, as in:
+
+```python
+from module import member as member
+```
+
 ## Example
 ```python
 import numpy as np  # unused import
@@ -51,11 +60,12 @@ else:
 ```
 
 ## Options
-- `pyflakes.extend-generics`
+- `lint.ignore-init-module-imports`
 
 ## References
 - [Python documentation: `import`](https://docs.python.org/3/reference/simple_stmts.html#the-import-statement)
 - [Python documentation: `importlib.util.find_spec`](https://docs.python.org/3/library/importlib.html#importlib.util.find_spec)
+- [Typing documentation: interface conventions](https://typing.readthedocs.io/en/latest/source/libraries.html#library-interface-public-and-private-symbols)
 
 ----- stderr -----
 

crates/ruff/tests/snapshots/integration_test__stdin_json.snap

@@ -1,5 +1,5 @@
 ---
-source: crates/ruff_cli/tests/integration_test.rs
+source: crates/ruff/tests/integration_test.rs
 info:
   program: ruff
   args:

crates/ruff/tests/snapshots/show_settings__display_default_settings.snap

@@ -0,0 +1,369 @@
+---
+source: crates/ruff/tests/show_settings.rs
+info:
+  program: ruff
+  args:
+    - check
+    - "--show-settings"
+    - unformatted.py
+---
+success: true
+exit_code: 0
+----- stdout -----
+Resolved settings for: "[BASEPATH]/crates/ruff/resources/test/fixtures/unformatted.py"
+Settings path: "[BASEPATH]/pyproject.toml"
+
+# General Settings
+cache_dir = "[BASEPATH]/.ruff_cache"
+fix = false
+fix_only = false
+output_format = concise
+show_fixes = false
+unsafe_fixes = hint
+
+# File Resolver Settings
+file_resolver.exclude = [
+	".bzr",
+	".direnv",
+	".eggs",
+	".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",
+]
+file_resolver.extend_exclude = [
+	"crates/ruff_linter/resources/",
+	"crates/ruff_python_formatter/resources/",
+]
+file_resolver.force_exclude = false
+file_resolver.include = [
+	"*.py",
+	"*.pyi",
+	"**/pyproject.toml",
+]
+file_resolver.extend_include = []
+file_resolver.respect_gitignore = true
+file_resolver.project_root = "[BASEPATH]"
+
+# Linter Settings
+linter.exclude = []
+linter.project_root = "[BASEPATH]"
+linter.rules.enabled = [
+	MultipleImportsOnOneLine,
+	ModuleImportNotAtTopOfFile,
+	MultipleStatementsOnOneLineColon,
+	MultipleStatementsOnOneLineSemicolon,
+	UselessSemicolon,
+	NoneComparison,
+	TrueFalseComparison,
+	NotInTest,
+	NotIsTest,
+	TypeComparison,
+	BareExcept,
+	LambdaAssignment,
+	AmbiguousVariableName,
+	AmbiguousClassName,
+	AmbiguousFunctionName,
+	IOError,
+	SyntaxError,
+	UnusedImport,
+	ImportShadowedByLoopVar,
+	UndefinedLocalWithImportStar,
+	LateFutureImport,
+	UndefinedLocalWithImportStarUsage,
+	UndefinedLocalWithNestedImportStarUsage,
+	FutureFeatureNotDefined,
+	PercentFormatInvalidFormat,
+	PercentFormatExpectedMapping,
+	PercentFormatExpectedSequence,
+	PercentFormatExtraNamedArguments,
+	PercentFormatMissingArgument,
+	PercentFormatMixedPositionalAndNamed,
+	PercentFormatPositionalCountMismatch,
+	PercentFormatStarRequiresSequence,
+	PercentFormatUnsupportedFormatCharacter,
+	StringDotFormatInvalidFormat,
+	StringDotFormatExtraNamedArguments,
+	StringDotFormatExtraPositionalArguments,
+	StringDotFormatMissingArguments,
+	StringDotFormatMixingAutomatic,
+	FStringMissingPlaceholders,
+	MultiValueRepeatedKeyLiteral,
+	MultiValueRepeatedKeyVariable,
+	ExpressionsInStarAssignment,
+	MultipleStarredExpressions,
+	AssertTuple,
+	IsLiteral,
+	InvalidPrintSyntax,
+	IfTuple,
+	BreakOutsideLoop,
+	ContinueOutsideLoop,
+	YieldOutsideFunction,
+	ReturnOutsideFunction,
+	DefaultExceptNotLast,
+	ForwardAnnotationSyntaxError,
+	RedefinedWhileUnused,
+	UndefinedName,
+	UndefinedExport,
+	UndefinedLocal,
+	UnusedVariable,
+	UnusedAnnotation,
+	RaiseNotImplemented,
+]
+linter.rules.should_fix = [
+	MultipleImportsOnOneLine,
+	ModuleImportNotAtTopOfFile,
+	MultipleStatementsOnOneLineColon,
+	MultipleStatementsOnOneLineSemicolon,
+	UselessSemicolon,
+	NoneComparison,
+	TrueFalseComparison,
+	NotInTest,
+	NotIsTest,
+	TypeComparison,
+	BareExcept,
+	LambdaAssignment,
+	AmbiguousVariableName,
+	AmbiguousClassName,
+	AmbiguousFunctionName,
+	IOError,
+	SyntaxError,
+	UnusedImport,
+	ImportShadowedByLoopVar,
+	UndefinedLocalWithImportStar,
+	LateFutureImport,
+	UndefinedLocalWithImportStarUsage,
+	UndefinedLocalWithNestedImportStarUsage,
+	FutureFeatureNotDefined,
+	PercentFormatInvalidFormat,
+	PercentFormatExpectedMapping,
+	PercentFormatExpectedSequence,
+	PercentFormatExtraNamedArguments,
+	PercentFormatMissingArgument,
+	PercentFormatMixedPositionalAndNamed,
+	PercentFormatPositionalCountMismatch,
+	PercentFormatStarRequiresSequence,
+	PercentFormatUnsupportedFormatCharacter,
+	StringDotFormatInvalidFormat,
+	StringDotFormatExtraNamedArguments,
+	StringDotFormatExtraPositionalArguments,
+	StringDotFormatMissingArguments,
+	StringDotFormatMixingAutomatic,
+	FStringMissingPlaceholders,
+	MultiValueRepeatedKeyLiteral,
+	MultiValueRepeatedKeyVariable,
+	ExpressionsInStarAssignment,
+	MultipleStarredExpressions,
+	AssertTuple,
+	IsLiteral,
+	InvalidPrintSyntax,
+	IfTuple,
+	BreakOutsideLoop,
+	ContinueOutsideLoop,
+	YieldOutsideFunction,
+	ReturnOutsideFunction,
+	DefaultExceptNotLast,
+	ForwardAnnotationSyntaxError,
+	RedefinedWhileUnused,
+	UndefinedName,
+	UndefinedExport,
+	UndefinedLocal,
+	UnusedVariable,
+	UnusedAnnotation,
+	RaiseNotImplemented,
+]
+linter.per_file_ignores = {}
+linter.safety_table.forced_safe = []
+linter.safety_table.forced_unsafe = []
+linter.target_version = Py37
+linter.preview = disabled
+linter.explicit_preview_rules = false
+linter.extension.mapping = {}
+linter.allowed_confusables = []
+linter.builtins = []
+linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.external = []
+linter.ignore_init_module_imports = false
+linter.logger_objects = []
+linter.namespace_packages = []
+linter.src = [
+	"[BASEPATH]",
+]
+linter.tab_size = 4
+linter.line_length = 88
+linter.task_tags = [
+	TODO,
+	FIXME,
+	XXX,
+]
+linter.typing_modules = []
+
+# Linter Plugins
+linter.flake8_annotations.mypy_init_return = false
+linter.flake8_annotations.suppress_dummy_args = false
+linter.flake8_annotations.suppress_none_returning = false
+linter.flake8_annotations.allow_star_arg_any = false
+linter.flake8_annotations.ignore_fully_untyped = false
+linter.flake8_bandit.hardcoded_tmp_directory = [
+	/tmp,
+	/var/tmp,
+	/dev/shm,
+]
+linter.flake8_bandit.check_typed_exception = false
+linter.flake8_bugbear.extend_immutable_calls = []
+linter.flake8_builtins.builtins_ignorelist = []
+linter.flake8_comprehensions.allow_dict_calls_with_keyword_arguments = false
+linter.flake8_copyright.notice_rgx = (?i)Copyright\s+(\(C\)\s+)?\d{4}(-\d{4})*
+linter.flake8_copyright.author = none
+linter.flake8_copyright.min_file_size = 0
+linter.flake8_errmsg.max_string_length = 0
+linter.flake8_gettext.functions_names = [
+	_,
+	gettext,
+	ngettext,
+]
+linter.flake8_implicit_str_concat.allow_multiline = true
+linter.flake8_import_conventions.aliases = {"matplotlib": "mpl", "matplotlib.pyplot": "plt", "pandas": "pd", "seaborn": "sns", "tensorflow": "tf", "networkx": "nx", "plotly.express": "px", "polars": "pl", "numpy": "np", "panel": "pn", "pyarrow": "pa", "altair": "alt", "tkinter": "tk", "holoviews": "hv"}
+linter.flake8_import_conventions.banned_aliases = {}
+linter.flake8_import_conventions.banned_from = []
+linter.flake8_pytest_style.fixture_parentheses = true
+linter.flake8_pytest_style.parametrize_names_type = tuple
+linter.flake8_pytest_style.parametrize_values_type = list
+linter.flake8_pytest_style.parametrize_values_row_type = tuple
+linter.flake8_pytest_style.raises_require_match_for = [
+	BaseException,
+	Exception,
+	ValueError,
+	OSError,
+	IOError,
+	EnvironmentError,
+	socket.error,
+]
+linter.flake8_pytest_style.raises_extend_require_match_for = []
+linter.flake8_pytest_style.mark_parentheses = true
+linter.flake8_quotes.inline_quotes = double
+linter.flake8_quotes.multiline_quotes = double
+linter.flake8_quotes.docstring_quotes = double
+linter.flake8_quotes.avoid_escape = true
+linter.flake8_self.ignore_names = [
+	_make,
+	_asdict,
+	_replace,
+	_fields,
+	_field_defaults,
+	_name_,
+	_value_,
+]
+linter.flake8_tidy_imports.ban_relative_imports = "parents"
+linter.flake8_tidy_imports.banned_api = {}
+linter.flake8_tidy_imports.banned_module_level_imports = []
+linter.flake8_type_checking.strict = false
+linter.flake8_type_checking.exempt_modules = [
+	typing,
+	typing_extensions,
+]
+linter.flake8_type_checking.runtime_required_base_classes = []
+linter.flake8_type_checking.runtime_required_decorators = []
+linter.flake8_type_checking.quote_annotations = false
+linter.flake8_unused_arguments.ignore_variadic_names = false
+linter.isort.required_imports = []
+linter.isort.combine_as_imports = false
+linter.isort.force_single_line = false
+linter.isort.force_sort_within_sections = false
+linter.isort.detect_same_package = true
+linter.isort.case_sensitive = false
+linter.isort.force_wrap_aliases = false
+linter.isort.force_to_top = []
+linter.isort.known_modules = {}
+linter.isort.order_by_type = true
+linter.isort.relative_imports_order = furthest_to_closest
+linter.isort.single_line_exclusions = []
+linter.isort.split_on_trailing_comma = true
+linter.isort.classes = []
+linter.isort.constants = []
+linter.isort.variables = []
+linter.isort.no_lines_before = []
+linter.isort.lines_after_imports = -1
+linter.isort.lines_between_types = 0
+linter.isort.forced_separate = []
+linter.isort.section_order = [
+	known { type = future },
+	known { type = standard_library },
+	known { type = third_party },
+	known { type = first_party },
+	known { type = local_folder },
+]
+linter.isort.no_sections = false
+linter.isort.from_first = false
+linter.isort.length_sort = false
+linter.isort.length_sort_straight = false
+linter.mccabe.max_complexity = 10
+linter.pep8_naming.ignore_names = [
+	setUp,
+	tearDown,
+	setUpClass,
+	tearDownClass,
+	setUpModule,
+	tearDownModule,
+	asyncSetUp,
+	asyncTearDown,
+	setUpTestData,
+	failureException,
+	longMessage,
+	maxDiff,
+]
+linter.pep8_naming.classmethod_decorators = []
+linter.pep8_naming.staticmethod_decorators = []
+linter.pycodestyle.max_line_length = 88
+linter.pycodestyle.max_doc_length = none
+linter.pycodestyle.ignore_overlong_task_comments = false
+linter.pyflakes.extend_generics = []
+linter.pylint.allow_magic_value_types = [
+	str,
+	bytes,
+]
+linter.pylint.allow_dunder_method_names = []
+linter.pylint.max_args = 5
+linter.pylint.max_positional_args = 5
+linter.pylint.max_returns = 6
+linter.pylint.max_bool_expr = 5
+linter.pylint.max_branches = 12
+linter.pylint.max_statements = 50
+linter.pylint.max_public_methods = 20
+linter.pylint.max_locals = 15
+linter.pyupgrade.keep_runtime_typing = false
+
+# Formatter Settings
+formatter.exclude = []
+formatter.target_version = Py37
+formatter.preview = disabled
+formatter.line_width = 88
+formatter.line_ending = auto
+formatter.indent_style = space
+formatter.indent_width = 4
+formatter.quote_style = double
+formatter.magic_trailing_comma = respect
+formatter.docstring_code_format = disabled
+formatter.docstring_code_line_width = dynamic
+
+----- stderr -----
+

crates/ruff_benchmark/Cargo.toml

@@ -13,6 +13,7 @@ license = { workspace = true }
 
 [lib]
 bench = false
+doctest = false
 
 [[bench]]
 name = "linter"
@@ -31,17 +32,17 @@ name = "formatter"
 harness = false
 
 [dependencies]
-once_cell.workspace = true
-serde.workspace = true
-serde_json.workspace = true
-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}
+once_cell = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+url = { workspace = true }
+ureq = { workspace = true }
+criterion = { workspace = true, default-features = false }
+codspeed-criterion-compat = { workspace = true, default-features = false, optional = true}
 
 [dev-dependencies]
-ruff_linter.path = "../ruff_linter"
-ruff_python_ast.path = "../ruff_python_ast"
+ruff_linter = { path = "../ruff_linter" }
+ruff_python_ast = { path = "../ruff_python_ast" }
 ruff_python_formatter = { path = "../ruff_python_formatter" }
 ruff_python_index = { path = "../ruff_python_index" }
 ruff_python_parser = { path = "../ruff_python_parser" }
@@ -53,7 +54,7 @@ workspace = true
 codspeed = ["codspeed-criterion-compat"]
 
 [target.'cfg(target_os = "windows")'.dev-dependencies]
-mimalloc = "0.1.39"
+mimalloc = { workspace = true }
 
 [target.'cfg(all(not(target_os = "windows"), not(target_os = "openbsd"), any(target_arch = "x86_64", target_arch = "aarch64", target_arch = "powerpc64")))'.dev-dependencies]
-tikv-jemallocator = "0.5.0"
+tikv-jemallocator = { workspace = true }

crates/ruff_benchmark/README.md

@@ -1,5 +1,16 @@
 # Ruff Benchmarks
 
-The `ruff_benchmark` crate benchmarks the linter and the formatter on individual files.
+The `ruff_benchmark` crate benchmarks the linter and the formatter on individual files:
+
+```shell
+# Run once on the "baseline".
+cargo bench -p ruff_benchmark -- --save-baseline=main
+
+# Compare against the "baseline".
+cargo bench -p ruff_benchmark -- --baseline=main
+
+# Run the lexer benchmarks.
+cargo bench -p ruff_benchmark lexer -- --baseline=main
+```
 
 See [CONTRIBUTING.md](../../CONTRIBUTING.md) on how to use these benchmarks.

crates/ruff_benchmark/benches/formatter.rs

@@ -7,7 +7,7 @@ use ruff_benchmark::{TestCase, TestFile, TestFileDownloadError};
 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};
+use ruff_python_parser::{allocate_tokens_vec, parse_tokens, Mode};
 
 #[cfg(target_os = "windows")]
 #[global_allocator]
@@ -52,7 +52,7 @@ fn benchmark_formatter(criterion: &mut Criterion) {
             BenchmarkId::from_parameter(case.name()),
             &case,
             |b, case| {
-                let mut tokens = Vec::new();
+                let mut tokens = allocate_tokens_vec(case.code());
                 let mut comment_ranges = CommentRangesBuilder::default();
 
                 for result in lex(case.code(), Mode::Module) {
@@ -65,7 +65,7 @@ fn benchmark_formatter(criterion: &mut Criterion) {
                 let comment_ranges = comment_ranges.finish();
 
                 // Parse the AST.
-                let module = parse_tokens(tokens, case.code(), Mode::Module, "<filename>")
+                let module = parse_tokens(tokens, case.code(), Mode::Module)
                     .expect("Input to be a valid python program");
 
                 b.iter(|| {

crates/ruff_benchmark/benches/linter.rs

@@ -55,11 +55,10 @@ fn benchmark_linter(mut group: BenchmarkGroup, settings: &LinterSettings) {
             &case,
             |b, case| {
                 // Tokenize the source.
-                let tokens = lexer::lex(case.code(), Mode::Module).collect::<Vec<_>>();
+                let tokens: Vec<_> = lexer::lex(case.code(), Mode::Module).collect();
 
                 // Parse the source.
-                let ast =
-                    parse_program_tokens(tokens.clone(), case.code(), case.name(), false).unwrap();
+                let ast = parse_program_tokens(tokens.clone(), case.code(), false).unwrap();
 
                 b.iter(|| {
                     let path = case.path();

crates/ruff_benchmark/benches/parser.rs

@@ -60,7 +60,7 @@ fn benchmark_parser(criterion: &mut Criterion<WallTime>) {
             &case,
             |b, case| {
                 b.iter(|| {
-                    let parsed = parse_suite(case.code(), case.name()).unwrap();
+                    let parsed = parse_suite(case.code()).unwrap();
 
                     let mut visitor = CountVisitor { count: 0 };
                     visitor.visit_body(&parsed);

crates/ruff_cache/Cargo.toml

@@ -16,7 +16,7 @@ glob = { workspace = true }
 globset = { workspace = true }
 regex = { workspace = true }
 filetime = { workspace = true }
-seahash = "4.1.0"
+seahash = { workspace = true }
 
 [dev-dependencies]
 ruff_macros = { path = "../ruff_macros" }

crates/ruff_cli/src/args.rs

@@ -1,762 +0,0 @@
-use std::path::PathBuf;
-
-use clap::{command, Parser};
-use regex::Regex;
-use rustc_hash::FxHashMap;
-
-use ruff_linter::line_width::LineLength;
-use ruff_linter::logging::LogLevel;
-use ruff_linter::registry::Rule;
-use ruff_linter::settings::types::{
-    ExtensionPair, FilePattern, PatternPrefixPair, PerFileIgnore, PreviewMode, PythonVersion,
-    SerializationFormat, UnsafeFixes,
-};
-use ruff_linter::{RuleParser, RuleSelector, RuleSelectorParser};
-use ruff_workspace::configuration::{Configuration, RuleSelection};
-use ruff_workspace::options::PycodestyleOptions;
-use ruff_workspace::resolver::ConfigurationTransformer;
-
-#[derive(Debug, Parser)]
-#[command(
-    author,
-    name = "ruff",
-    about = "Ruff: An extremely fast Python linter.",
-    after_help = "For help with a specific command, see: `ruff help <command>`."
-)]
-#[command(version)]
-pub struct Args {
-    #[command(subcommand)]
-    pub command: Command,
-    #[clap(flatten)]
-    pub log_level_args: LogLevelArgs,
-}
-
-#[allow(clippy::large_enum_variant)]
-#[derive(Debug, clap::Subcommand)]
-pub enum Command {
-    /// Run Ruff on the given files or directories (default).
-    Check(CheckCommand),
-    /// Explain a rule (or all rules).
-    #[clap(alias = "--explain")]
-    #[command(group = clap::ArgGroup::new("selector").multiple(false).required(true))]
-    Rule {
-        /// Rule to explain
-        #[arg(value_parser=RuleParser, group = "selector", hide_possible_values = true)]
-        rule: Option<Rule>,
-
-        /// Explain all rules
-        #[arg(long, conflicts_with = "rule", group = "selector")]
-        all: bool,
-
-        /// Output format
-        #[arg(long, value_enum, default_value = "text")]
-        output_format: HelpFormat,
-
-        /// Output format (Deprecated: Use `--output-format` instead).
-        #[arg(long, value_enum, conflicts_with = "output_format", hide = true)]
-        format: Option<HelpFormat>,
-    },
-    /// List or describe the available configuration options.
-    Config { option: Option<String> },
-    /// List all supported upstream linters.
-    Linter {
-        /// Output format
-        #[arg(long, value_enum, default_value = "text")]
-        output_format: HelpFormat,
-
-        /// Output format (Deprecated: Use `--output-format` instead).
-        #[arg(long, value_enum, conflicts_with = "output_format", hide = true)]
-        format: Option<HelpFormat>,
-    },
-    /// Clear any caches in the current directory and any subdirectories.
-    #[clap(alias = "--clean")]
-    Clean,
-    /// Generate shell completion.
-    #[clap(alias = "--generate-shell-completion", hide = true)]
-    GenerateShellCompletion { shell: clap_complete_command::Shell },
-    /// Run the Ruff formatter on the given files or directories.
-    Format(FormatCommand),
-    /// Display Ruff's version
-    Version {
-        #[arg(long, value_enum, default_value = "text")]
-        output_format: HelpFormat,
-    },
-}
-
-// The `Parser` derive is for ruff_dev, for ruff_cli `Args` would be sufficient
-#[derive(Clone, Debug, clap::Parser)]
-#[allow(clippy::struct_excessive_bools)]
-pub struct CheckCommand {
-    /// List of files or directories to check.
-    #[clap(help = "List of files or directories to check [default: .]")]
-    pub files: Vec<PathBuf>,
-    /// Apply fixes to resolve lint violations.
-    /// Use `--no-fix` to disable or `--unsafe-fixes` to include unsafe fixes.
-    #[arg(long, overrides_with("no_fix"))]
-    fix: bool,
-    #[clap(long, overrides_with("fix"), hide = true)]
-    no_fix: bool,
-    /// Include fixes that may not retain the original intent of the code.
-    /// Use `--no-unsafe-fixes` to disable.
-    #[arg(long, overrides_with("no_unsafe_fixes"))]
-    unsafe_fixes: bool,
-    #[arg(long, overrides_with("unsafe_fixes"), hide = true)]
-    no_unsafe_fixes: bool,
-    /// Show violations with source code.
-    /// Use `--no-show-source` to disable.
-    #[arg(long, overrides_with("no_show_source"))]
-    show_source: bool,
-    #[clap(long, overrides_with("show_source"), hide = true)]
-    no_show_source: bool,
-    /// Show an enumeration of all fixed lint violations.
-    /// Use `--no-show-fixes` to disable.
-    #[arg(long, overrides_with("no_show_fixes"))]
-    show_fixes: bool,
-    #[clap(long, overrides_with("show_fixes"), hide = true)]
-    no_show_fixes: bool,
-    /// Avoid writing any fixed files back; instead, output a diff for each changed file to stdout. Implies `--fix-only`.
-    #[arg(long, conflicts_with = "show_fixes")]
-    pub diff: bool,
-    /// Run in watch mode by re-running whenever files change.
-    #[arg(short, long)]
-    pub watch: bool,
-    /// Apply fixes to resolve lint violations, but don't report on leftover violations. Implies `--fix`.
-    /// Use `--no-fix-only` to disable or `--unsafe-fixes` to include unsafe fixes.
-    #[arg(long, overrides_with("no_fix_only"))]
-    fix_only: bool,
-    #[clap(long, overrides_with("fix_only"), hide = true)]
-    no_fix_only: bool,
-    /// Ignore any `# noqa` comments.
-    #[arg(long)]
-    ignore_noqa: bool,
-
-    /// Output serialization format for violations.
-    #[arg(long, value_enum, env = "RUFF_OUTPUT_FORMAT")]
-    pub output_format: Option<SerializationFormat>,
-
-    /// Specify file to write the linter output to (default: stdout).
-    #[arg(short, long)]
-    pub output_file: Option<PathBuf>,
-    /// The minimum Python version that should be supported.
-    #[arg(long, value_enum)]
-    pub target_version: Option<PythonVersion>,
-    /// Enable preview mode; checks will include unstable rules and fixes.
-    /// Use `--no-preview` to disable.
-    #[arg(long, overrides_with("no_preview"))]
-    preview: bool,
-    #[clap(long, overrides_with("preview"), hide = true)]
-    no_preview: bool,
-    /// Path to the `pyproject.toml` or `ruff.toml` file to use for
-    /// configuration.
-    #[arg(long, conflicts_with = "isolated")]
-    pub config: Option<PathBuf>,
-    /// Comma-separated list of rule codes to enable (or ALL, to enable all rules).
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide_possible_values = true
-    )]
-    pub select: Option<Vec<RuleSelector>>,
-    /// Comma-separated list of rule codes to disable.
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide_possible_values = true
-    )]
-    pub ignore: Option<Vec<RuleSelector>>,
-    /// Like --select, but adds additional rule codes on top of those already specified.
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide_possible_values = true
-    )]
-    pub extend_select: Option<Vec<RuleSelector>>,
-    /// Like --ignore. (Deprecated: You can just use --ignore instead.)
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide = true
-    )]
-    pub extend_ignore: Option<Vec<RuleSelector>>,
-    /// List of mappings from file pattern to code to exclude.
-    #[arg(long, value_delimiter = ',', help_heading = "Rule selection")]
-    pub per_file_ignores: Option<Vec<PatternPrefixPair>>,
-    /// Like `--per-file-ignores`, but adds additional ignores on top of those already specified.
-    #[arg(long, value_delimiter = ',', help_heading = "Rule selection")]
-    pub extend_per_file_ignores: Option<Vec<PatternPrefixPair>>,
-    /// List of paths, used to omit files and/or directories from analysis.
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "FILE_PATTERN",
-        help_heading = "File selection"
-    )]
-    pub exclude: Option<Vec<FilePattern>>,
-    /// Like --exclude, but adds additional files and directories on top of those already excluded.
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "FILE_PATTERN",
-        help_heading = "File selection"
-    )]
-    pub extend_exclude: Option<Vec<FilePattern>>,
-    /// List of rule codes to treat as eligible for fix. Only applicable when fix itself is enabled (e.g., via `--fix`).
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide_possible_values = true
-    )]
-    pub fixable: Option<Vec<RuleSelector>>,
-    /// List of rule codes to treat as ineligible for fix. Only applicable when fix itself is enabled (e.g., via `--fix`).
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide_possible_values = true
-    )]
-    pub unfixable: Option<Vec<RuleSelector>>,
-    /// Like --fixable, but adds additional rule codes on top of those already specified.
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide_possible_values = true
-    )]
-    pub extend_fixable: Option<Vec<RuleSelector>>,
-    /// Like --unfixable. (Deprecated: You can just use --unfixable instead.)
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "RULE_CODE",
-        value_parser = RuleSelectorParser,
-        help_heading = "Rule selection",
-        hide = true
-    )]
-    pub extend_unfixable: Option<Vec<RuleSelector>>,
-    /// Respect file exclusions via `.gitignore` and other standard ignore files.
-    /// Use `--no-respect-gitignore` to disable.
-    #[arg(
-        long,
-        overrides_with("no_respect_gitignore"),
-        help_heading = "File selection"
-    )]
-    respect_gitignore: bool,
-    #[clap(long, overrides_with("respect_gitignore"), hide = true)]
-    no_respect_gitignore: bool,
-    /// Enforce exclusions, even for paths passed to Ruff directly on the command-line.
-    /// Use `--no-force-exclude` to disable.
-    #[arg(
-        long,
-        overrides_with("no_force_exclude"),
-        help_heading = "File selection"
-    )]
-    force_exclude: bool,
-    #[clap(long, overrides_with("force_exclude"), hide = true)]
-    no_force_exclude: bool,
-    /// Set the line-length for length-associated rules and automatic formatting.
-    #[arg(long, help_heading = "Rule configuration", hide = true)]
-    pub line_length: Option<LineLength>,
-    /// Regular expression matching the name of dummy variables.
-    #[arg(long, help_heading = "Rule configuration", hide = true)]
-    pub dummy_variable_rgx: Option<Regex>,
-    /// Disable cache reads.
-    #[arg(short, long, env = "RUFF_NO_CACHE", help_heading = "Miscellaneous")]
-    pub no_cache: bool,
-    /// Ignore all configuration files.
-    #[arg(long, conflicts_with = "config", help_heading = "Miscellaneous")]
-    pub isolated: bool,
-    /// Path to the cache directory.
-    #[arg(long, env = "RUFF_CACHE_DIR", help_heading = "Miscellaneous")]
-    pub cache_dir: Option<PathBuf>,
-    /// The name of the file when passing it through stdin.
-    #[arg(long, help_heading = "Miscellaneous")]
-    pub stdin_filename: Option<PathBuf>,
-    /// Exit with status code "0", even upon detecting lint violations.
-    #[arg(
-        short,
-        long,
-        help_heading = "Miscellaneous",
-        conflicts_with = "exit_non_zero_on_fix"
-    )]
-    pub exit_zero: bool,
-    /// Exit with a non-zero status code if any files were modified via fix, even if no lint violations remain.
-    #[arg(long, help_heading = "Miscellaneous", conflicts_with = "exit_zero")]
-    pub exit_non_zero_on_fix: bool,
-    /// Show counts for every rule with at least one violation.
-    #[arg(
-        long,
-        // Unsupported default-command arguments.
-        conflicts_with = "diff",
-        conflicts_with = "show_source",
-        conflicts_with = "watch",
-    )]
-    pub statistics: bool,
-    /// Enable automatic additions of `noqa` directives to failing lines.
-    #[arg(
-        long,
-        // conflicts_with = "add_noqa",
-        conflicts_with = "show_files",
-        conflicts_with = "show_settings",
-        // Unsupported default-command arguments.
-        conflicts_with = "ignore_noqa",
-        conflicts_with = "statistics",
-        conflicts_with = "stdin_filename",
-        conflicts_with = "watch",
-        conflicts_with = "fix",
-    )]
-    pub add_noqa: bool,
-    /// See the files Ruff will be run against with the current settings.
-    #[arg(
-        long,
-        // Fake subcommands.
-        conflicts_with = "add_noqa",
-        // conflicts_with = "show_files",
-        conflicts_with = "show_settings",
-        // Unsupported default-command arguments.
-        conflicts_with = "ignore_noqa",
-        conflicts_with = "statistics",
-        conflicts_with = "stdin_filename",
-        conflicts_with = "watch",
-    )]
-    pub show_files: bool,
-    /// See the settings Ruff will use to lint a given Python file.
-    #[arg(
-        long,
-        // Fake subcommands.
-        conflicts_with = "add_noqa",
-        conflicts_with = "show_files",
-        // conflicts_with = "show_settings",
-        // Unsupported default-command arguments.
-        conflicts_with = "ignore_noqa",
-        conflicts_with = "statistics",
-        conflicts_with = "stdin_filename",
-        conflicts_with = "watch",
-    )]
-    pub show_settings: bool,
-    /// List of mappings from file extension to language (one of ["python", "ipynb", "pyi"]).
-    #[arg(long, value_delimiter = ',', hide = true)]
-    pub extension: Option<Vec<ExtensionPair>>,
-    /// Dev-only argument to show fixes
-    #[arg(long, hide = true)]
-    pub ecosystem_ci: bool,
-}
-
-#[derive(Clone, Debug, clap::Parser)]
-#[allow(clippy::struct_excessive_bools)]
-pub struct FormatCommand {
-    /// List of files or directories to format.
-    #[clap(help = "List of files or directories to format [default: .]")]
-    pub files: Vec<PathBuf>,
-    /// Avoid writing any formatted files back; instead, exit with a non-zero status code if any
-    /// files would have been modified, and zero otherwise.
-    #[arg(long)]
-    pub check: bool,
-    /// Avoid writing any formatted files back; instead, exit with a non-zero status code and the
-    /// difference between the current file and how the formatted file would look like.
-    #[arg(long)]
-    pub diff: bool,
-    /// Path to the `pyproject.toml` or `ruff.toml` file to use for configuration.
-    #[arg(long, conflicts_with = "isolated")]
-    pub config: Option<PathBuf>,
-
-    /// Disable cache reads.
-    #[arg(short, long, env = "RUFF_NO_CACHE", help_heading = "Miscellaneous")]
-    pub no_cache: bool,
-    /// Path to the cache directory.
-    #[arg(long, env = "RUFF_CACHE_DIR", help_heading = "Miscellaneous")]
-    pub cache_dir: Option<PathBuf>,
-
-    /// Respect file exclusions via `.gitignore` and other standard ignore files.
-    /// Use `--no-respect-gitignore` to disable.
-    #[arg(
-        long,
-        overrides_with("no_respect_gitignore"),
-        help_heading = "File selection"
-    )]
-    respect_gitignore: bool,
-    #[clap(long, overrides_with("respect_gitignore"), hide = true)]
-    no_respect_gitignore: bool,
-    /// List of paths, used to omit files and/or directories from analysis.
-    #[arg(
-        long,
-        value_delimiter = ',',
-        value_name = "FILE_PATTERN",
-        help_heading = "File selection"
-    )]
-    pub exclude: Option<Vec<FilePattern>>,
-
-    /// Enforce exclusions, even for paths passed to Ruff directly on the command-line.
-    /// Use `--no-force-exclude` to disable.
-    #[arg(
-        long,
-        overrides_with("no_force_exclude"),
-        help_heading = "File selection"
-    )]
-    force_exclude: bool,
-    #[clap(long, overrides_with("force_exclude"), hide = true)]
-    no_force_exclude: bool,
-    /// Set the line-length.
-    #[arg(long, help_heading = "Format configuration")]
-    pub line_length: Option<LineLength>,
-    /// Ignore all configuration files.
-    #[arg(long, conflicts_with = "config", help_heading = "Miscellaneous")]
-    pub isolated: bool,
-    /// The name of the file when passing it through stdin.
-    #[arg(long, help_heading = "Miscellaneous")]
-    pub stdin_filename: Option<PathBuf>,
-    /// The minimum Python version that should be supported.
-    #[arg(long, value_enum)]
-    pub target_version: Option<PythonVersion>,
-    /// Enable preview mode; enables unstable formatting.
-    /// Use `--no-preview` to disable.
-    #[arg(long, overrides_with("no_preview"))]
-    preview: bool,
-    #[clap(long, overrides_with("preview"), hide = true)]
-    no_preview: bool,
-}
-
-#[derive(Debug, Clone, Copy, clap::ValueEnum)]
-pub enum HelpFormat {
-    Text,
-    Json,
-}
-
-#[allow(clippy::module_name_repetitions)]
-#[derive(Debug, clap::Args)]
-pub struct LogLevelArgs {
-    /// Enable verbose logging.
-    #[arg(
-        short,
-        long,
-        global = true,
-        group = "verbosity",
-        help_heading = "Log levels"
-    )]
-    pub verbose: bool,
-    /// Print diagnostics, but nothing else.
-    #[arg(
-        short,
-        long,
-        global = true,
-        group = "verbosity",
-        help_heading = "Log levels"
-    )]
-    pub quiet: bool,
-    /// Disable all logging (but still exit with status code "1" upon detecting diagnostics).
-    #[arg(
-        short,
-        long,
-        global = true,
-        group = "verbosity",
-        help_heading = "Log levels"
-    )]
-    pub silent: bool,
-}
-
-impl From<&LogLevelArgs> for LogLevel {
-    fn from(args: &LogLevelArgs) -> Self {
-        if args.silent {
-            Self::Silent
-        } else if args.quiet {
-            Self::Quiet
-        } else if args.verbose {
-            Self::Verbose
-        } else {
-            Self::Default
-        }
-    }
-}
-
-impl CheckCommand {
-    /// Partition the CLI into command-line arguments and configuration
-    /// overrides.
-    pub fn partition(self) -> (CheckArguments, CliOverrides) {
-        (
-            CheckArguments {
-                add_noqa: self.add_noqa,
-                config: self.config,
-                diff: self.diff,
-                ecosystem_ci: self.ecosystem_ci,
-                exit_non_zero_on_fix: self.exit_non_zero_on_fix,
-                exit_zero: self.exit_zero,
-                files: self.files,
-                ignore_noqa: self.ignore_noqa,
-                isolated: self.isolated,
-                no_cache: self.no_cache,
-                output_file: self.output_file,
-                show_files: self.show_files,
-                show_settings: self.show_settings,
-                statistics: self.statistics,
-                stdin_filename: self.stdin_filename,
-                watch: self.watch,
-            },
-            CliOverrides {
-                dummy_variable_rgx: self.dummy_variable_rgx,
-                exclude: self.exclude,
-                extend_exclude: self.extend_exclude,
-                extend_fixable: self.extend_fixable,
-                extend_ignore: self.extend_ignore,
-                extend_per_file_ignores: self.extend_per_file_ignores,
-                extend_select: self.extend_select,
-                extend_unfixable: self.extend_unfixable,
-                fixable: self.fixable,
-                ignore: self.ignore,
-                line_length: self.line_length,
-                per_file_ignores: self.per_file_ignores,
-                preview: resolve_bool_arg(self.preview, self.no_preview).map(PreviewMode::from),
-                respect_gitignore: resolve_bool_arg(
-                    self.respect_gitignore,
-                    self.no_respect_gitignore,
-                ),
-                select: self.select,
-                show_source: resolve_bool_arg(self.show_source, self.no_show_source),
-                target_version: self.target_version,
-                unfixable: self.unfixable,
-                // TODO(charlie): Included in `pyproject.toml`, but not inherited.
-                cache_dir: self.cache_dir,
-                fix: resolve_bool_arg(self.fix, self.no_fix),
-                fix_only: resolve_bool_arg(self.fix_only, self.no_fix_only),
-                unsafe_fixes: resolve_bool_arg(self.unsafe_fixes, self.no_unsafe_fixes)
-                    .map(UnsafeFixes::from),
-                force_exclude: resolve_bool_arg(self.force_exclude, self.no_force_exclude),
-                output_format: self.output_format,
-                show_fixes: resolve_bool_arg(self.show_fixes, self.no_show_fixes),
-                extension: self.extension,
-            },
-        )
-    }
-}
-
-impl FormatCommand {
-    /// Partition the CLI into command-line arguments and configuration
-    /// overrides.
-    pub fn partition(self) -> (FormatArguments, CliOverrides) {
-        (
-            FormatArguments {
-                check: self.check,
-                diff: self.diff,
-                config: self.config,
-                files: self.files,
-                isolated: self.isolated,
-                no_cache: self.no_cache,
-                stdin_filename: self.stdin_filename,
-            },
-            CliOverrides {
-                line_length: self.line_length,
-                respect_gitignore: resolve_bool_arg(
-                    self.respect_gitignore,
-                    self.no_respect_gitignore,
-                ),
-                exclude: self.exclude,
-                preview: resolve_bool_arg(self.preview, self.no_preview).map(PreviewMode::from),
-                force_exclude: resolve_bool_arg(self.force_exclude, self.no_force_exclude),
-                target_version: self.target_version,
-                cache_dir: self.cache_dir,
-
-                // Unsupported on the formatter CLI, but required on `Overrides`.
-                ..CliOverrides::default()
-            },
-        )
-    }
-}
-
-fn resolve_bool_arg(yes: bool, no: bool) -> Option<bool> {
-    match (yes, no) {
-        (true, false) => Some(true),
-        (false, true) => Some(false),
-        (false, false) => None,
-        (..) => unreachable!("Clap should make this impossible"),
-    }
-}
-
-/// CLI settings that are distinct from configuration (commands, lists of files,
-/// etc.).
-#[allow(clippy::struct_excessive_bools)]
-pub struct CheckArguments {
-    pub add_noqa: bool,
-    pub config: Option<PathBuf>,
-    pub diff: bool,
-    pub ecosystem_ci: bool,
-    pub exit_non_zero_on_fix: bool,
-    pub exit_zero: bool,
-    pub files: Vec<PathBuf>,
-    pub ignore_noqa: bool,
-    pub isolated: bool,
-    pub no_cache: bool,
-    pub output_file: Option<PathBuf>,
-    pub show_files: bool,
-    pub show_settings: bool,
-    pub statistics: bool,
-    pub stdin_filename: Option<PathBuf>,
-    pub watch: bool,
-}
-
-/// CLI settings that are distinct from configuration (commands, lists of files,
-/// etc.).
-#[allow(clippy::struct_excessive_bools)]
-pub struct FormatArguments {
-    pub check: bool,
-    pub no_cache: bool,
-    pub diff: bool,
-    pub config: Option<PathBuf>,
-    pub files: Vec<PathBuf>,
-    pub isolated: bool,
-    pub stdin_filename: Option<PathBuf>,
-}
-
-/// CLI settings that function as configuration overrides.
-#[derive(Clone, Default)]
-#[allow(clippy::struct_excessive_bools)]
-pub struct CliOverrides {
-    pub dummy_variable_rgx: Option<Regex>,
-    pub exclude: Option<Vec<FilePattern>>,
-    pub extend_exclude: Option<Vec<FilePattern>>,
-    pub extend_fixable: Option<Vec<RuleSelector>>,
-    pub extend_ignore: Option<Vec<RuleSelector>>,
-    pub extend_select: Option<Vec<RuleSelector>>,
-    pub extend_unfixable: Option<Vec<RuleSelector>>,
-    pub fixable: Option<Vec<RuleSelector>>,
-    pub ignore: Option<Vec<RuleSelector>>,
-    pub line_length: Option<LineLength>,
-    pub per_file_ignores: Option<Vec<PatternPrefixPair>>,
-    pub extend_per_file_ignores: Option<Vec<PatternPrefixPair>>,
-    pub preview: Option<PreviewMode>,
-    pub respect_gitignore: Option<bool>,
-    pub select: Option<Vec<RuleSelector>>,
-    pub show_source: Option<bool>,
-    pub target_version: Option<PythonVersion>,
-    pub unfixable: Option<Vec<RuleSelector>>,
-    // TODO(charlie): Captured in pyproject.toml as a default, but not part of `Settings`.
-    pub cache_dir: Option<PathBuf>,
-    pub fix: Option<bool>,
-    pub fix_only: Option<bool>,
-    pub unsafe_fixes: Option<UnsafeFixes>,
-    pub force_exclude: Option<bool>,
-    pub output_format: Option<SerializationFormat>,
-    pub show_fixes: Option<bool>,
-    pub extension: Option<Vec<ExtensionPair>>,
-}
-
-impl ConfigurationTransformer for CliOverrides {
-    fn transform(&self, mut config: Configuration) -> Configuration {
-        if let Some(cache_dir) = &self.cache_dir {
-            config.cache_dir = Some(cache_dir.clone());
-        }
-        if let Some(dummy_variable_rgx) = &self.dummy_variable_rgx {
-            config.lint.dummy_variable_rgx = Some(dummy_variable_rgx.clone());
-        }
-        if let Some(exclude) = &self.exclude {
-            config.exclude = Some(exclude.clone());
-        }
-        if let Some(extend_exclude) = &self.extend_exclude {
-            config.extend_exclude.extend(extend_exclude.clone());
-        }
-        if let Some(extend_per_file_ignores) = &self.extend_per_file_ignores {
-            config
-                .lint
-                .extend_per_file_ignores
-                .extend(collect_per_file_ignores(extend_per_file_ignores.clone()));
-        }
-        if let Some(fix) = &self.fix {
-            config.fix = Some(*fix);
-        }
-        if let Some(fix_only) = &self.fix_only {
-            config.fix_only = Some(*fix_only);
-        }
-        if self.unsafe_fixes.is_some() {
-            config.unsafe_fixes = self.unsafe_fixes;
-        }
-        config.lint.rule_selections.push(RuleSelection {
-            select: self.select.clone(),
-            ignore: self
-                .ignore
-                .iter()
-                .cloned()
-                .chain(self.extend_ignore.iter().cloned())
-                .flatten()
-                .collect(),
-            extend_select: self.extend_select.clone().unwrap_or_default(),
-            fixable: self.fixable.clone(),
-            unfixable: self
-                .unfixable
-                .iter()
-                .cloned()
-                .chain(self.extend_unfixable.iter().cloned())
-                .flatten()
-                .collect(),
-            extend_fixable: self.extend_fixable.clone().unwrap_or_default(),
-        });
-        if let Some(output_format) = &self.output_format {
-            config.output_format = Some(*output_format);
-        }
-        if let Some(force_exclude) = &self.force_exclude {
-            config.force_exclude = Some(*force_exclude);
-        }
-        if let Some(line_length) = self.line_length {
-            config.line_length = Some(line_length);
-            config.lint.pycodestyle = Some(PycodestyleOptions {
-                max_line_length: Some(line_length),
-                ..config.lint.pycodestyle.unwrap_or_default()
-            });
-        }
-        if let Some(preview) = &self.preview {
-            config.preview = Some(*preview);
-            config.lint.preview = Some(*preview);
-            config.format.preview = Some(*preview);
-        }
-        if let Some(per_file_ignores) = &self.per_file_ignores {
-            config.lint.per_file_ignores = Some(collect_per_file_ignores(per_file_ignores.clone()));
-        }
-        if let Some(respect_gitignore) = &self.respect_gitignore {
-            config.respect_gitignore = Some(*respect_gitignore);
-        }
-        if let Some(show_source) = &self.show_source {
-            config.show_source = Some(*show_source);
-        }
-        if let Some(show_fixes) = &self.show_fixes {
-            config.show_fixes = Some(*show_fixes);
-        }
-        if let Some(target_version) = &self.target_version {
-            config.target_version = Some(*target_version);
-        }
-        if let Some(extension) = &self.extension {
-            config.lint.extension = Some(extension.clone().into_iter().collect());
-        }
-
-        config
-    }
-}
-
-/// Convert a list of `PatternPrefixPair` structs to `PerFileIgnore`.
-pub fn collect_per_file_ignores(pairs: Vec<PatternPrefixPair>) -> Vec<PerFileIgnore> {
-    let mut per_file_ignores: FxHashMap<String, Vec<RuleSelector>> = FxHashMap::default();
-    for pair in pairs {
-        per_file_ignores
-            .entry(pair.pattern)
-            .or_default()
-            .push(pair.prefix);
-    }
-    per_file_ignores
-        .into_iter()
-        .map(|(pattern, prefixes)| PerFileIgnore::new(pattern, &prefixes, None))
-        .collect()
-}

crates/ruff_cli/src/snapshots/ruff_cli__version__tests__version_formatting.snap

@@ -1,5 +0,0 @@
----
-source: crates/ruff_cli/src/version.rs
-expression: version
----
-0.0.0

crates/ruff_cli/tests/lint.rs

@@ -1,438 +0,0 @@
-//! Tests the interaction of the `lint` configuration section
-
-#![cfg(not(target_family = "wasm"))]
-
-use std::fs;
-use std::process::Command;
-use std::str;
-
-use anyhow::Result;
-use insta_cmd::{assert_cmd_snapshot, get_cargo_bin};
-use tempfile::TempDir;
-
-const BIN_NAME: &str = "ruff";
-const STDIN_BASE_OPTIONS: &[&str] = &["--no-cache", "--output-format", "text"];
-
-#[test]
-fn top_level_options() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-extend-select = ["B", "Q"]
-
-[flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .args(STDIN_BASE_OPTIONS)
-        .arg("--config")
-        .arg(&ruff_toml)
-        .args(["--stdin-filename", "test.py"])
-        .arg("-")
-        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    test.py:1:5: Q000 [*] Double quotes found but single quotes preferred
-    test.py:1:5: B005 Using `.strip()` with multi-character strings is misleading
-    test.py:1:19: Q000 [*] Double quotes found but single quotes preferred
-    Found 3 errors.
-    [*] 2 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-#[test]
-fn lint_options() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-[lint]
-extend-select = ["B", "Q"]
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .args(STDIN_BASE_OPTIONS)
-        .arg("--config")
-        .arg(&ruff_toml)
-        .arg("-")
-        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    -:1:5: Q000 [*] Double quotes found but single quotes preferred
-    -:1:5: B005 Using `.strip()` with multi-character strings is misleading
-    -:1:19: Q000 [*] Double quotes found but single quotes preferred
-    Found 3 errors.
-    [*] 2 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-/// Tests that configurations from the top-level and `lint` section are merged together.
-#[test]
-fn mixed_levels() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-extend-select = ["B", "Q"]
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .args(STDIN_BASE_OPTIONS)
-        .arg("--config")
-        .arg(&ruff_toml)
-        .arg("-")
-        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    -:1:5: Q000 [*] Double quotes found but single quotes preferred
-    -:1:5: B005 Using `.strip()` with multi-character strings is misleading
-    -:1:19: Q000 [*] Double quotes found but single quotes preferred
-    Found 3 errors.
-    [*] 2 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-/// Tests that options in the `lint` section have higher precedence than top-level options (because they are more specific).
-#[test]
-fn precedence() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-[lint]
-extend-select = ["B", "Q"]
-
-[flake8-quotes]
-inline-quotes = "double"
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .args(STDIN_BASE_OPTIONS)
-        .arg("--config")
-        .arg(&ruff_toml)
-        .arg("-")
-        .pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    -:1:5: Q000 [*] Double quotes found but single quotes preferred
-    -:1:5: B005 Using `.strip()` with multi-character strings is misleading
-    -:1:19: Q000 [*] Double quotes found but single quotes preferred
-    Found 3 errors.
-    [*] 2 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-#[test]
-fn exclude() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-extend-select = ["B", "Q"]
-extend-exclude = ["out"]
-
-[lint]
-exclude = ["test.py", "generated.py"]
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    fs::write(
-        tempdir.path().join("main.py"),
-        r#"
-from test import say_hy
-
-if __name__ == "__main__":
-    say_hy("dear Ruff contributor")
-"#,
-    )?;
-
-    // Excluded file but passed to the CLI directly, should be linted
-    let test_path = tempdir.path().join("test.py");
-    fs::write(
-        &test_path,
-        r#"
-def say_hy(name: str):
-        print(f"Hy {name}")"#,
-    )?;
-
-    fs::write(
-        tempdir.path().join("generated.py"),
-        r#"NUMBERS = [
-     0,  1,  2,  3,  4,  5,  6,  7,  8,  9,
-    10, 11, 12, 13, 14, 15, 16, 17, 18, 19
-]
-OTHER = "OTHER"
-"#,
-    )?;
-
-    let out_dir = tempdir.path().join("out");
-    fs::create_dir(&out_dir)?;
-
-    fs::write(out_dir.join("a.py"), r#"a = "a""#)?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .current_dir(tempdir.path())
-        .arg("check")
-        .args(STDIN_BASE_OPTIONS)
-        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
-        // Explicitly pass test.py, should be linted regardless of it being excluded by lint.exclude
-        .arg(test_path.file_name().unwrap())
-        // Lint all other files in the directory, should respect the `exclude` and `lint.exclude` options
-        .arg("."), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    main.py:4:16: Q000 [*] Double quotes found but single quotes preferred
-    main.py:5:12: Q000 [*] Double quotes found but single quotes preferred
-    test.py:3:15: Q000 [*] Double quotes found but single quotes preferred
-    Found 3 errors.
-    [*] 3 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-#[test]
-fn exclude_stdin() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-extend-select = ["B", "Q"]
-
-[lint]
-exclude = ["generated.py"]
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .current_dir(tempdir.path())
-        .arg("check")
-        .args(STDIN_BASE_OPTIONS)
-        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
-        .args(["--stdin-filename", "generated.py"])
-        .arg("-")
-        .pass_stdin(r#"
-from test import say_hy
-
-if __name__ == "__main__":
-    say_hy("dear Ruff contributor")
-"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    generated.py:4:16: Q000 [*] Double quotes found but single quotes preferred
-    generated.py:5:12: Q000 [*] Double quotes found but single quotes preferred
-    Found 2 errors.
-    [*] 2 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-#[test]
-fn line_too_long_width_override() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-line-length = 80
-select = ["E501"]
-
-[pycodestyle]
-max-line-length = 100
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .args(STDIN_BASE_OPTIONS)
-        .arg("--config")
-        .arg(&ruff_toml)
-        .args(["--stdin-filename", "test.py"])
-        .arg("-")
-        .pass_stdin(r#"
-# longer than 80, but less than 100
-_ = "---------------------------------------------------------------------------亜亜亜亜亜亜"
-# longer than 100
-_ = "---------------------------------------------------------------------------亜亜亜亜亜亜亜亜亜亜亜亜亜亜"
-"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    test.py:5:91: E501 Line too long (109 > 100)
-    Found 1 error.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-#[test]
-fn per_file_ignores_stdin() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-extend-select = ["B", "Q"]
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .current_dir(tempdir.path())
-        .arg("check")
-        .args(STDIN_BASE_OPTIONS)
-        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
-        .args(["--stdin-filename", "generated.py"])
-        .args(["--per-file-ignores", "generated.py:Q"])
-        .arg("-")
-        .pass_stdin(r#"
-import os
-
-from test import say_hy
-
-if __name__ == "__main__":
-    say_hy("dear Ruff contributor")
-"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    generated.py:2:8: F401 [*] `os` imported but unused
-    Found 1 error.
-    [*] 1 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-#[test]
-fn extend_per_file_ignores_stdin() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let ruff_toml = tempdir.path().join("ruff.toml");
-    fs::write(
-        &ruff_toml,
-        r#"
-extend-select = ["B", "Q"]
-
-[lint.flake8-quotes]
-inline-quotes = "single"
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .current_dir(tempdir.path())
-        .arg("check")
-        .args(STDIN_BASE_OPTIONS)
-        .args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
-        .args(["--stdin-filename", "generated.py"])
-        .args(["--extend-per-file-ignores", "generated.py:Q"])
-        .arg("-")
-        .pass_stdin(r#"
-import os
-
-from test import say_hy
-
-if __name__ == "__main__":
-    say_hy("dear Ruff contributor")
-"#), @r###"
-    success: false
-    exit_code: 1
-    ----- stdout -----
-    generated.py:2:8: F401 [*] `os` imported but unused
-    Found 1 error.
-    [*] 1 fixable with the `--fix` option.
-
-    ----- stderr -----
-    "###);
-    Ok(())
-}
-
-/// Regression test for [#8858](https://github.com/astral-sh/ruff/issues/8858)
-#[test]
-fn parent_configuration_override() -> Result<()> {
-    let tempdir = TempDir::new()?;
-    let root_ruff = tempdir.path().join("ruff.toml");
-    fs::write(
-        root_ruff,
-        r#"
-[lint]
-select = ["ALL"]
-"#,
-    )?;
-
-    let sub_dir = tempdir.path().join("subdirectory");
-    fs::create_dir(&sub_dir)?;
-
-    let subdirectory_ruff = sub_dir.join("ruff.toml");
-    fs::write(
-        subdirectory_ruff,
-        r#"
-[lint]
-ignore = ["D203", "D212"]
-"#,
-    )?;
-
-    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .current_dir(sub_dir)
-        .arg("check")
-        .args(STDIN_BASE_OPTIONS)
-        , @r###"
-    success: true
-    exit_code: 0
-    ----- stdout -----
-
-    ----- stderr -----
-    warning: No Python files found under the given path(s)
-    "###);
-    Ok(())
-}

crates/ruff_dev/Cargo.toml

@@ -11,45 +11,43 @@ repository = { workspace = true }
 license = { workspace = true }
 
 [dependencies]
-ruff_linter = { path = "../ruff_linter", features = ["schemars"] }
-ruff_cli = { path = "../ruff_cli" }
+ruff = { path = "../ruff" }
 ruff_diagnostics = { path = "../ruff_diagnostics" }
 ruff_formatter = { path = "../ruff_formatter" }
+ruff_linter = { path = "../ruff_linter", features = ["schemars"] }
+ruff_notebook = { path = "../ruff_notebook" }
 ruff_python_ast = { path = "../ruff_python_ast" }
 ruff_python_codegen = { path = "../ruff_python_codegen" }
 ruff_python_formatter = { path = "../ruff_python_formatter" }
-ruff_notebook = { path = "../ruff_notebook" }
-ruff_python_literal = { path = "../ruff_python_literal" }
 ruff_python_parser = { path = "../ruff_python_parser" }
 ruff_python_stdlib = { path = "../ruff_python_stdlib" }
 ruff_python_trivia = { path = "../ruff_python_trivia" }
 ruff_workspace = { path = "../ruff_workspace", features = ["schemars"]}
 
 anyhow = { workspace = true }
-clap = { workspace = true }
+clap = { workspace = true, features = ["wrap_help"] }
 ignore = { workspace = true }
-indicatif = "0.17.7"
+imara-diff = { workspace = true }
+indicatif = { workspace = true }
 itertools = { workspace = true }
 libcst = { workspace = true }
 once_cell = { workspace = true }
-pretty_assertions = { version = "1.3.0" }
-rayon = "1.8.0"
+pretty_assertions = { workspace = true }
+rayon = { workspace = true }
 regex = { workspace = true }
 schemars = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
 similar = { workspace = true }
 strum = { workspace = true }
-strum_macros = { workspace = true }
-tempfile = "3.8.1"
+tempfile = { workspace = true }
 toml = { workspace = true, features = ["parse"] }
 tracing = { workspace = true }
 tracing-indicatif = { workspace = true }
 tracing-subscriber = { workspace = true, features = ["env-filter"] }
-imara-diff = "0.1.5"
 
 [dev-dependencies]
-indoc = "2.0.4"
+indoc = { workspace = true }
 
 [features]
 # Turn off rayon for profiling

crates/ruff_dev/src/format_dev.rs

@@ -27,34 +27,34 @@ use tracing_subscriber::layer::SubscriberExt;
 use tracing_subscriber::util::SubscriberInitExt;
 use tracing_subscriber::EnvFilter;
 
-use ruff_cli::args::{FormatCommand, LogLevelArgs};
-use ruff_cli::resolve::resolve;
+use ruff::args::{ConfigArguments, FormatArguments, FormatCommand, LogLevelArgs};
+use ruff::resolve::resolve;
 use ruff_formatter::{FormatError, LineWidth, PrintError};
 use ruff_linter::logging::LogLevel;
 use ruff_linter::settings::types::{FilePattern, FilePatternSet};
 use ruff_python_formatter::{
     format_module_source, FormatModuleError, MagicTrailingComma, PreviewMode, PyFormatOptions,
 };
+use ruff_python_parser::ParseError;
 use ruff_workspace::resolver::{python_files_in_path, PyprojectConfig, ResolvedFile, Resolver};
 
-/// Find files that ruff would check so we can format them. Adapted from `ruff_cli`.
-#[allow(clippy::type_complexity)]
-fn ruff_check_paths(
-    dirs: &[PathBuf],
-) -> anyhow::Result<(
-    Vec<Result<ResolvedFile, ignore::Error>>,
-    Resolver,
-    PyprojectConfig,
-)> {
+fn parse_cli(dirs: &[PathBuf]) -> anyhow::Result<(FormatArguments, ConfigArguments)> {
     let args_matches = FormatCommand::command()
         .no_binary_name(true)
         .get_matches_from(dirs);
     let arguments: FormatCommand = FormatCommand::from_arg_matches(&args_matches)?;
-    let (cli, overrides) = arguments.partition();
+    let (cli, config_arguments) = arguments.partition()?;
+    Ok((cli, config_arguments))
+}
+
+/// Find the [`PyprojectConfig`] to use for formatting.
+fn find_pyproject_config(
+    cli: &FormatArguments,
+    config_arguments: &ConfigArguments,
+) -> anyhow::Result<PyprojectConfig> {
     let mut pyproject_config = resolve(
         cli.isolated,
-        cli.config.as_deref(),
-        &overrides,
+        config_arguments,
         cli.stdin_filename.as_deref(),
     )?;
     // We don't want to format pyproject.toml
@@ -63,11 +63,18 @@ fn ruff_check_paths(
         FilePattern::Builtin("*.pyi"),
     ])
     .unwrap();
-    let (paths, resolver) = python_files_in_path(&cli.files, &pyproject_config, &overrides)?;
-    if paths.is_empty() {
-        bail!("no python files in {:?}", dirs)
-    }
-    Ok((paths, resolver, pyproject_config))
+    Ok(pyproject_config)
+}
+
+/// Find files that ruff would check so we can format them. Adapted from `ruff`.
+#[allow(clippy::type_complexity)]
+fn ruff_check_paths<'a>(
+    pyproject_config: &'a PyprojectConfig,
+    cli: &FormatArguments,
+    config_arguments: &ConfigArguments,
+) -> anyhow::Result<(Vec<Result<ResolvedFile, ignore::Error>>, Resolver<'a>)> {
+    let (paths, resolver) = python_files_in_path(&cli.files, pyproject_config, config_arguments)?;
+    Ok((paths, resolver))
 }
 
 /// Collects statistics over the formatted files to compute the Jaccard index or the similarity
@@ -215,6 +222,7 @@ pub(crate) struct Args {
     #[arg(long)]
     pub(crate) files_with_errors: Option<u32>,
     #[clap(flatten)]
+    #[allow(clippy::struct_field_names)]
     pub(crate) log_level_args: LogLevelArgs,
 }
 
@@ -278,7 +286,7 @@ fn setup_logging(log_level_args: &LogLevelArgs, log_file: Option<&Path>) -> io::
         LogLevel::Quiet => tracing::Level::WARN,
         LogLevel::Silent => tracing::Level::ERROR,
     };
-    // 1. `RUST_LOG=`, 2. explicit CLI log level, 3. info, the ruff_cli default
+    // 1. `RUST_LOG=`, 2. explicit CLI log level, 3. info, the ruff default
     let filter_layer = EnvFilter::try_from_default_env().unwrap_or_else(|_| {
         EnvFilter::builder()
             .with_default_directive(log_level.into())
@@ -450,11 +458,17 @@ fn format_dev_project(
         files[0].display()
     );
 
-    // TODO(konstin): black excludes
+    // TODO(konstin): Respect black's excludes.
 
-    // Find files to check (or in this case, format twice). Adapted from ruff_cli
+    // Find files to check (or in this case, format twice). Adapted from ruff
     // First argument is ignored
-    let (paths, resolver, pyproject_config) = ruff_check_paths(files)?;
+    let (cli, overrides) = parse_cli(files)?;
+    let pyproject_config = find_pyproject_config(&cli, &overrides)?;
+    let (paths, resolver) = ruff_check_paths(&pyproject_config, &cli, &overrides)?;
+
+    if paths.is_empty() {
+        bail!("No Python files found under the given path(s)");
+    }
 
     let results = {
         let pb_span =
@@ -467,14 +481,7 @@ fn format_dev_project(
         #[cfg(feature = "singlethreaded")]
         let iter = { paths.into_iter() };
         iter.map(|path| {
-            let result = format_dir_entry(
-                path,
-                stability_check,
-                write,
-                &black_options,
-                &resolver,
-                &pyproject_config,
-            );
+            let result = format_dir_entry(path, stability_check, write, &black_options, &resolver);
             pb_span.pb_inc(1);
             result
         })
@@ -524,14 +531,13 @@ fn format_dev_project(
     })
 }
 
-/// Error handling in between walkdir and `format_dev_file`
+/// Error handling in between walkdir and `format_dev_file`.
 fn format_dir_entry(
     resolved_file: Result<ResolvedFile, ignore::Error>,
     stability_check: bool,
     write: bool,
     options: &BlackOptions,
     resolver: &Resolver,
-    pyproject_config: &PyprojectConfig,
 ) -> anyhow::Result<(Result<Statistics, CheckFileError>, PathBuf), Error> {
     let resolved_file = resolved_file.context("Iterating the files in the repository failed")?;
     // For some reason it does not filter in the beginning
@@ -542,7 +548,7 @@ fn format_dir_entry(
     let path = resolved_file.into_path();
     let mut options = options.to_py_format_options(&path);
 
-    let settings = resolver.resolve(&path, pyproject_config);
+    let settings = resolver.resolve(&path);
     // That's a bad way of doing this but it's not worth doing something better for format_dev
     if settings.formatter.line_width != LineWidth::default() {
         options = options.with_line_width(settings.formatter.line_width);
@@ -742,11 +748,11 @@ enum CheckFileError {
         reformatted: String,
     },
     /// The input file was already invalid (not a bug)
-    SyntaxErrorInInput(FormatModuleError),
+    SyntaxErrorInInput(ParseError),
     /// The formatter introduced a syntax error
     SyntaxErrorInOutput {
         formatted: String,
-        error: FormatModuleError,
+        error: ParseError,
     },
     /// The formatter failed (bug)
     FormatError(FormatError),
@@ -796,7 +802,7 @@ fn format_dev_file(
     let start = Instant::now();
     let printed = match format_module_source(&content, options.clone()) {
         Ok(printed) => printed,
-        Err(err @ (FormatModuleError::LexError(_) | FormatModuleError::ParseError(_))) => {
+        Err(FormatModuleError::ParseError(err)) => {
             return Err(CheckFileError::SyntaxErrorInInput(err));
         }
         Err(FormatModuleError::FormatError(err)) => {
@@ -823,7 +829,7 @@ fn format_dev_file(
     if stability_check {
         let reformatted = match format_module_source(formatted, options) {
             Ok(reformatted) => reformatted,
-            Err(err @ (FormatModuleError::LexError(_) | FormatModuleError::ParseError(_))) => {
+            Err(FormatModuleError::ParseError(err)) => {
                 return Err(CheckFileError::SyntaxErrorInOutput {
                     formatted: formatted.to_string(),
                     error: err,

crates/ruff_dev/src/generate_cli_help.rs

@@ -8,7 +8,7 @@ use anyhow::{bail, Context, Result};
 use clap::CommandFactory;
 use pretty_assertions::StrComparison;
 
-use ruff_cli::args;
+use ruff::args;
 
 use crate::generate_all::{Mode, REGENERATE_ALL_COMMAND};
 use crate::ROOT_DIR;
@@ -114,12 +114,15 @@ pub(super) fn main(args: &Args) -> Result<()> {
 
 /// Returns the output of `ruff help`.
 fn help_text() -> String {
-    args::Args::command().render_help().to_string()
+    args::Args::command()
+        .term_width(79)
+        .render_help()
+        .to_string()
 }
 
 /// Returns the output of a given subcommand (e.g., `ruff help check`).
 fn subcommand_help_text(subcommand: &str) -> Result<String> {
-    let mut cmd = args::Args::command();
+    let mut cmd = args::Args::command().term_width(79);
 
     // The build call is necessary for the help output to contain `Usage: ruff
     // check` instead of `Usage: check` see https://github.com/clap-rs/clap/issues/4685

crates/ruff_dev/src/generate_docs.rs

@@ -26,9 +26,9 @@ pub(crate) fn main(args: &Args) -> Result<()> {
     for rule in Rule::iter() {
         if let Some(explanation) = rule.explanation() {
             let mut output = String::new();
+
             output.push_str(&format!("# {} ({})", rule.as_ref(), rule.noqa_code()));
             output.push('\n');
-            output.push('\n');
 
             let (linter, _) = Linter::parse_code(&rule.noqa_code().to_string()).unwrap();
             if linter.url().is_some() {
@@ -37,6 +37,22 @@ pub(crate) fn main(args: &Args) -> Result<()> {
                 output.push('\n');
             }
 
+            if rule.is_deprecated() {
+                output.push_str(
+                    r"**Warning: This rule is deprecated and will be removed in a future release.**",
+                );
+                output.push('\n');
+                output.push('\n');
+            }
+
+            if rule.is_removed() {
+                output.push_str(
+                    r"**Warning: This rule has been removed and its documentation is only available for historical reasons.**",
+                );
+                output.push('\n');
+                output.push('\n');
+            }
+
             let fix_availability = rule.fixable();
             if matches!(
                 fix_availability,
@@ -116,7 +132,7 @@ fn process_documentation(documentation: &str, out: &mut String, rule_name: &str)
                     }
                 }
 
-                let anchor = option.replace('.', "-");
+                let anchor = option.replace('.', "_");
                 out.push_str(&format!("- [`{option}`][{option}]\n"));
                 after.push_str(&format!("[{option}]: ../settings.md#{anchor}\n"));
 
@@ -142,13 +158,13 @@ mod tests {
         let mut output = String::new();
         process_documentation(
             "
-See also [`mccabe.max-complexity`] and [`task-tags`].
+See also [`lint.mccabe.max-complexity`] and [`lint.task-tags`].
 Something [`else`][other].
 
 ## Options
 
-- `task-tags`
-- `mccabe.max-complexity`
+- `lint.task-tags`
+- `lint.mccabe.max-complexity`
 
 [other]: http://example.com.",
             &mut output,
@@ -157,18 +173,18 @@ Something [`else`][other].
         assert_eq!(
             output,
             "
-See also [`mccabe.max-complexity`][mccabe.max-complexity] and [`task-tags`][task-tags].
+See also [`lint.mccabe.max-complexity`][lint.mccabe.max-complexity] and [`lint.task-tags`][lint.task-tags].
 Something [`else`][other].
 
 ## Options
 
-- [`task-tags`][task-tags]
-- [`mccabe.max-complexity`][mccabe.max-complexity]
+- [`lint.task-tags`][lint.task-tags]
+- [`lint.mccabe.max-complexity`][lint.mccabe.max-complexity]
 
 [other]: http://example.com.
 
-[task-tags]: ../settings.md#task-tags
-[mccabe.max-complexity]: ../settings.md#mccabe-max-complexity
+[lint.task-tags]: ../settings.md#lint_task-tags
+[lint.mccabe.max-complexity]: ../settings.md#lint_mccabe_max-complexity
 "
         );
     }

crates/ruff_dev/src/generate_options.rs

@@ -1,6 +1,7 @@
 //! Generate a Markdown-compatible listing of configuration options for `pyproject.toml`.
 //!
 //! Used for <https://docs.astral.sh/ruff/settings/>.
+use itertools::Itertools;
 use std::fmt::Write;
 
 use ruff_python_trivia::textwrap;
@@ -9,16 +10,29 @@ use ruff_workspace::options_base::{OptionField, OptionSet, OptionsMetadata, Visi
 
 pub(crate) fn generate() -> String {
     let mut output = String::new();
-    generate_set(&mut output, &Set::Toplevel(Options::metadata()));
+
+    generate_set(
+        &mut output,
+        Set::Toplevel(Options::metadata()),
+        &mut Vec::new(),
+    );
 
     output
 }
 
-fn generate_set(output: &mut String, set: &Set) {
-    if set.level() < 2 {
-        writeln!(output, "### {title}\n", title = set.title()).unwrap();
-    } else {
-        writeln!(output, "#### {title}\n", title = set.title()).unwrap();
+fn generate_set(output: &mut String, set: Set, parents: &mut Vec<Set>) {
+    match &set {
+        Set::Toplevel(_) => {
+            output.push_str("### Top-level\n");
+        }
+        Set::Named { name, .. } => {
+            let title = parents
+                .iter()
+                .filter_map(|set| set.name())
+                .chain(std::iter::once(name.as_str()))
+                .join(".");
+            writeln!(output, "#### `{title}`\n",).unwrap();
+        }
     }
 
     if let Some(documentation) = set.metadata().documentation() {
@@ -35,72 +49,68 @@ fn generate_set(output: &mut String, set: &Set) {
     fields.sort_unstable_by(|(name, _), (name2, _)| name.cmp(name2));
     sets.sort_unstable_by(|(name, _), (name2, _)| name.cmp(name2));
 
+    parents.push(set);
+
     // Generate the fields.
     for (name, field) in &fields {
-        emit_field(output, name, field, set);
+        emit_field(output, name, field, parents.as_slice());
         output.push_str("---\n\n");
     }
 
     // Generate all the sub-sets.
     for (set_name, sub_set) in &sets {
-        generate_set(output, &Set::Named(set_name, *sub_set, set.level() + 1));
+        generate_set(
+            output,
+            Set::Named {
+                name: set_name.to_string(),
+                set: *sub_set,
+            },
+            parents,
+        );
     }
+
+    parents.pop();
 }
 
-enum Set<'a> {
+enum Set {
     Toplevel(OptionSet),
-    Named(&'a str, OptionSet, u32),
+    Named { name: String, set: OptionSet },
 }
 
-impl<'a> Set<'a> {
-    fn name(&self) -> Option<&'a str> {
+impl Set {
+    fn name(&self) -> Option<&str> {
         match self {
             Set::Toplevel(_) => None,
-            Set::Named(name, _, _) => Some(name),
-        }
-    }
-
-    fn title(&self) -> &'a str {
-        match self {
-            Set::Toplevel(_) => "Top-level",
-            Set::Named(name, _, _) => name,
+            Set::Named { name, .. } => Some(name),
         }
     }
 
     fn metadata(&self) -> &OptionSet {
         match self {
             Set::Toplevel(set) => set,
-            Set::Named(_, set, _) => set,
-        }
-    }
-
-    fn level(&self) -> u32 {
-        match self {
-            Set::Toplevel(_) => 0,
-            Set::Named(_, _, level) => *level,
+            Set::Named { set, .. } => set,
         }
     }
 }
 
-fn emit_field(output: &mut String, name: &str, field: &OptionField, parent_set: &Set) {
-    let header_level = if parent_set.level() < 2 {
-        "####"
-    } else {
-        "#####"
-    };
+fn emit_field(output: &mut String, name: &str, field: &OptionField, parents: &[Set]) {
+    let header_level = if parents.is_empty() { "####" } else { "#####" };
+    let parents_anchor = parents.iter().filter_map(|parent| parent.name()).join("_");
+
+    if parents_anchor.is_empty() {
+        output.push_str(&format!(
+            "{header_level} [`{name}`](#{name}) {{: #{name} }}\n"
+        ));
+    } else {
+        output.push_str(&format!(
+            "{header_level} [`{name}`](#{parents_anchor}_{name}) {{: #{parents_anchor}_{name} }}\n"
+        ));
 
-    // if there's a set name, we need to add it to the anchor
-    if let Some(set_name) = parent_set.name() {
         // the anchor used to just be the name, but now it's the group name
         // for backwards compatibility, we need to keep the old anchor
         output.push_str(&format!("<span id=\"{name}\"></span>\n"));
-
-        output.push_str(&format!(
-            "{header_level} [`{name}`](#{set_name}-{name}) {{: #{set_name}-{name} }}\n"
-        ));
-    } else {
-        output.push_str(&format!("{header_level} [`{name}`](#{name})\n"));
     }
+
     output.push('\n');
 
     if let Some(deprecated) = &field.deprecated {
@@ -129,12 +139,12 @@ fn emit_field(output: &mut String, name: &str, field: &OptionField, parent_set:
     output.push_str("**Example usage**:\n\n");
     output.push_str(&format_tab(
         "pyproject.toml",
-        &format_header(field.scope, parent_set, ConfigurationFile::PyprojectToml),
+        &format_header(field.scope, parents, ConfigurationFile::PyprojectToml),
         field.example,
     ));
     output.push_str(&format_tab(
         "ruff.toml",
-        &format_header(field.scope, parent_set, ConfigurationFile::RuffToml),
+        &format_header(field.scope, parents, ConfigurationFile::RuffToml),
         field.example,
     ));
     output.push('\n');
@@ -152,52 +162,22 @@ fn format_tab(tab_name: &str, header: &str, content: &str) -> String {
 /// Format the TOML header for the example usage for a given option.
 ///
 /// For example: `[tool.ruff.format]` or `[tool.ruff.lint.isort]`.
-fn format_header(
-    scope: Option<&str>,
-    parent_set: &Set,
-    configuration: ConfigurationFile,
-) -> String {
-    match configuration {
-        ConfigurationFile::PyprojectToml => {
-            let mut header = if let Some(set_name) = parent_set.name() {
-                if set_name == "format" {
-                    String::from("tool.ruff.format")
-                } else {
-                    format!("tool.ruff.lint.{set_name}")
-                }
-            } else {
-                "tool.ruff".to_string()
-            };
-            if let Some(scope) = scope {
-                if !header.is_empty() {
-                    header.push('.');
-                }
-                header.push_str(scope);
-            }
-            format!("[{header}]")
-        }
-        ConfigurationFile::RuffToml => {
-            let mut header = if let Some(set_name) = parent_set.name() {
-                if set_name == "format" {
-                    String::from("format")
-                } else {
-                    format!("lint.{set_name}")
-                }
-            } else {
-                String::new()
-            };
-            if let Some(scope) = scope {
-                if !header.is_empty() {
-                    header.push('.');
-                }
-                header.push_str(scope);
-            }
-            if header.is_empty() {
-                String::new()
-            } else {
-                format!("[{header}]")
-            }
-        }
+fn format_header(scope: Option<&str>, parents: &[Set], configuration: ConfigurationFile) -> String {
+    let tool_parent = match configuration {
+        ConfigurationFile::PyprojectToml => Some("tool.ruff"),
+        ConfigurationFile::RuffToml => None,
+    };
+
+    let header = tool_parent
+        .into_iter()
+        .chain(parents.iter().filter_map(|parent| parent.name()))
+        .chain(scope)
+        .join(".");
+
+    if header.is_empty() {
+        String::new()
+    } else {
+        format!("[{header}]")
     }
 }
 

crates/ruff_dev/src/generate_rules_table.rs

@@ -3,6 +3,8 @@
 //! Used for <https://docs.astral.sh/ruff/rules/>.
 
 use itertools::Itertools;
+use ruff_linter::codes::RuleGroup;
+use std::borrow::Cow;
 use strum::IntoEnumIterator;
 
 use ruff_diagnostics::FixAvailability;
@@ -13,6 +15,10 @@ use ruff_workspace::options_base::OptionsMetadata;
 
 const FIX_SYMBOL: &str = "🛠️";
 const PREVIEW_SYMBOL: &str = "🧪";
+const REMOVED_SYMBOL: &str = "❌";
+const WARNING_SYMBOL: &str = "⚠️";
+const STABLE_SYMBOL: &str = "✔️";
+const SPACER: &str = "&nbsp;&nbsp;&nbsp;&nbsp;";
 
 fn generate_table(table_out: &mut String, rules: impl IntoIterator<Item = Rule>, linter: &Linter) {
     table_out.push_str("| Code | Name | Message | |");
@@ -20,34 +26,68 @@ fn generate_table(table_out: &mut String, rules: impl IntoIterator<Item = Rule>,
     table_out.push_str("| ---- | ---- | ------- | ------: |");
     table_out.push('\n');
     for rule in rules {
+        let status_token = match rule.group() {
+            RuleGroup::Removed => {
+                format!("<span title='Rule has been removed'>{REMOVED_SYMBOL}</span>")
+            }
+            RuleGroup::Deprecated => {
+                format!("<span title='Rule has been deprecated'>{WARNING_SYMBOL}</span>")
+            }
+            #[allow(deprecated)]
+            RuleGroup::Preview | RuleGroup::Nursery => {
+                format!("<span title='Rule is in preview'>{PREVIEW_SYMBOL}</span>")
+            }
+            RuleGroup::Stable => {
+                // A full opacity checkmark is a bit aggressive for indicating stable
+                format!("<span title='Rule is stable' style='opacity: 0.6'>{STABLE_SYMBOL}</span>")
+            }
+        };
+
         let fix_token = match rule.fixable() {
             FixAvailability::Always | FixAvailability::Sometimes => {
                 format!("<span title='Automatic fix available'>{FIX_SYMBOL}</span>")
             }
             FixAvailability::None => {
-                format!("<span style='opacity: 0.1' aria-hidden='true'>{FIX_SYMBOL}</span>")
+                format!("<span title='Automatic fix not available' style='opacity: 0.1' aria-hidden='true'>{FIX_SYMBOL}</span>")
             }
         };
-        let preview_token = if rule.is_preview() || rule.is_nursery() {
-            format!("<span title='Rule is in preview'>{PREVIEW_SYMBOL}</span>")
-        } else {
-            format!("<span style='opacity: 0.1' aria-hidden='true'>{PREVIEW_SYMBOL}</span>")
-        };
-        let status_token = format!("{fix_token} {preview_token}");
+
+        let tokens = format!("{status_token} {fix_token}");
 
         let rule_name = rule.as_ref();
 
+        // If the message ends in a bracketed expression (like: "Use {replacement}"), escape the
+        // brackets. Otherwise, it'll be interpreted as an HTML attribute via the `attr_list`
+        // plugin. (Above, we'd convert to "Use {replacement\}".)
+        let message = rule.message_formats()[0];
+        let message = if let Some(prefix) = message.strip_suffix('}') {
+            Cow::Owned(format!("{prefix}\\}}"))
+        } else {
+            Cow::Borrowed(message)
+        };
+
+        // Start and end of style spans
+        let mut ss = "";
+        let mut se = "";
+        if rule.is_removed() {
+            ss = "<span style='opacity: 0.5', title='This rule has been removed'>";
+            se = "</span>";
+        } else if rule.is_deprecated() {
+            ss = "<span style='opacity: 0.8', title='This rule has been deprecated'>";
+            se = "</span>";
+        }
+
         #[allow(clippy::or_fun_call)]
         table_out.push_str(&format!(
-            "| {0}{1} {{ #{0}{1} }} | {2} | {3} | {4} |",
+            "| {ss}{0}{1}{se} {{ #{0}{1} }} | {ss}{2}{se} | {ss}{3}{se} | {ss}{4}{se} |",
             linter.common_prefix(),
             linter.code_for_rule(rule).unwrap(),
             rule.explanation()
                 .is_some()
                 .then_some(format_args!("[{rule_name}](rules/{rule_name}.md)"))
                 .unwrap_or(format_args!("{rule_name}")),
-            rule.message_formats()[0],
-            status_token,
+            message,
+            tokens,
         ));
         table_out.push('\n');
     }
@@ -58,15 +98,33 @@ pub(crate) fn generate() -> String {
     // Generate the table string.
     let mut table_out = String::new();
 
-    table_out.push_str(&format!(
-        "The {FIX_SYMBOL} emoji indicates that a rule is automatically fixable by the `--fix` command-line option."));
-    table_out.push('\n');
+    table_out.push_str("### Legend");
     table_out.push('\n');
 
     table_out.push_str(&format!(
-        "The {PREVIEW_SYMBOL} emoji indicates that a rule is in [\"preview\"](faq.md#what-is-preview)."
+        "{SPACER}{STABLE_SYMBOL}{SPACER} The rule is stable."
     ));
-    table_out.push('\n');
+    table_out.push_str("<br />");
+
+    table_out.push_str(&format!(
+        "{SPACER}{PREVIEW_SYMBOL}{SPACER} The rule is unstable and is in [\"preview\"](faq.md#what-is-preview)."
+    ));
+    table_out.push_str("<br />");
+
+    table_out.push_str(&format!(
+        "{SPACER}{WARNING_SYMBOL}{SPACER} The rule has been deprecated and will be removed in a future release."
+    ));
+    table_out.push_str("<br />");
+
+    table_out.push_str(&format!(
+        "{SPACER}{REMOVED_SYMBOL}{SPACER} The rule has been removed only the documentation is available."
+    ));
+    table_out.push_str("<br />");
+
+    table_out.push_str(&format!(
+        "{SPACER}{FIX_SYMBOL}{SPACER} The rule is automatically fixable by the `--fix` command-line option."
+    ));
+    table_out.push_str("<br />");
     table_out.push('\n');
 
     for linter in Linter::iter() {

crates/ruff_dev/src/main.rs

@@ -4,7 +4,7 @@
 
 use anyhow::Result;
 use clap::{Parser, Subcommand};
-use ruff_cli::check;
+use ruff::check;
 use ruff_linter::logging::{set_up_logging, LogLevel};
 use std::process::ExitCode;
 
@@ -56,9 +56,9 @@ enum Command {
     /// Run a ruff command n times for profiling/benchmarking
     Repeat {
         #[clap(flatten)]
-        args: ruff_cli::args::CheckCommand,
+        args: ruff::args::CheckCommand,
         #[clap(flatten)]
-        log_level_args: ruff_cli::args::LogLevelArgs,
+        log_level_args: ruff::args::LogLevelArgs,
         /// Run this many times
         #[clap(long)]
         repeat: usize,