Bump version to 0.0.141

This reverts commit bd08fc359d.

.cargo/config.toml

@@ -0,0 +1,2 @@
+[alias]
+dev = "run --package ruff_dev --bin ruff_dev"

.github/workflows/ci.yaml

@@ -6,6 +6,11 @@ on:
   pull_request:
     branches: [main]
 
+env:
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  RUSTUP_MAX_RETRIES: 10
+
 jobs:
   cargo_build:
     name: "cargo build"
@@ -14,7 +19,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          profile: minimal
       - uses: actions/cache@v3
         env:
           cache-name: cache-cargo
@@ -27,7 +32,7 @@ jobs:
             ${{ runner.os }}-build-${{ env.cache-name }}-
             ${{ runner.os }}-build-
             ${{ runner.os }}-
-      - run: cargo build --release
+      - run: cargo build --all --release
 
   cargo_fmt:
     name: "cargo fmt"
@@ -36,7 +41,10 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
+          components: rustfmt
       - uses: actions/cache@v3
         env:
           cache-name: cache-cargo
@@ -49,7 +57,7 @@ jobs:
             ${{ runner.os }}-build-${{ env.cache-name }}-
             ${{ runner.os }}-build-
             ${{ runner.os }}-
-      - run: cargo fmt --check
+      - run: cargo fmt --all --check
 
   cargo_clippy:
     name: "cargo clippy"
@@ -58,7 +66,10 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
+          components: clippy
       - uses: actions/cache@v3
         env:
           cache-name: cache-cargo
@@ -71,7 +82,7 @@ jobs:
             ${{ runner.os }}-build-${{ env.cache-name }}-
             ${{ runner.os }}-build-
             ${{ runner.os }}-
-      - run: cargo clippy -- -D warnings
+      - run: cargo clippy --workspace --all-targets --all-features -- -D warnings -W clippy::pedantic
 
   cargo_test:
     name: "cargo test"
@@ -80,7 +91,9 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
       - uses: actions/cache@v3
         env:
           cache-name: cache-cargo
@@ -93,7 +106,7 @@ jobs:
             ${{ runner.os }}-build-${{ env.cache-name }}-
             ${{ runner.os }}-build-
             ${{ runner.os }}-
-      - run: cargo test
+      - run: cargo test --all
 
   maturin_build:
     name: "maturin build"
@@ -102,7 +115,9 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"

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

@@ -0,0 +1,293 @@
+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: "3.7" # to build abi3 wheels
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  RUSTUP_MAX_RETRIES: 10
+
+jobs:
+  macos-x86_64:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          default: true
+      - name: Build wheels - x86_64
+        uses: messense/maturin-action@v1
+        with:
+          target: x86_64
+          args: --release --out dist --sdist -m ./${{ 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@v2
+        with:
+          name: wheels
+          path: dist
+  macos-universal:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          default: true
+      - name: Build wheels - universal2
+        uses: messense/maturin-action@v1
+        with:
+          args: --release --universal2 --out dist -m ./${{ 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@v2
+        with:
+          name: wheels
+          path: dist
+
+  windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        target: [x64, x86]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: ${{ matrix.target }}
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          default: true
+      - name: Build wheels
+        uses: messense/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@v2
+        with:
+          name: wheels
+          path: dist
+
+  linux:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [x86_64, i686]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: Build wheels
+        uses: messense/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@v2
+        with:
+          name: wheels
+          path: dist
+
+  linux-cross:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [aarch64, armv7, s390x, ppc64le, ppc64]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Build wheels
+        uses: messense/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@v2.0.5
+        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@v2
+        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@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: Build wheels
+        uses: messense/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@v2
+        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@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Build wheels
+        uses: messense/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@master
+        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@v2
+        with:
+          name: wheels
+          path: dist
+
+  pypy:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        target: [x86_64, aarch64]
+        python-version:
+          - "3.7"
+          - "3.8"
+          - "3.9"
+        exclude:
+          - os: macos-latest
+            target: aarch64
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: pypy${{ matrix.python-version }}
+      - name: Build wheels
+        uses: messense/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          manylinux: auto
+          args: --release --out dist -i pypy${{ matrix.python-version }} -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@v2
+        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
+      - pypy
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: wheels
+      - uses: actions/setup-python@v4
+      - 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/ruff.yaml

@@ -1,8 +1,6 @@
-name: Release
+name: "[ruff] Release"
 
 on:
-  pull_request:
-    branches: [main]
   create:
     tags:
       - v*
@@ -14,6 +12,9 @@ concurrency:
 env:
   PACKAGE_NAME: ruff
   PYTHON_VERSION: "3.7" # to build abi3 wheels
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  RUSTUP_MAX_RETRIES: 10
 
 jobs:
   macos-x86_64:
@@ -35,7 +36,6 @@ jobs:
         with:
           target: x86_64
           args: --release --out dist --sdist
-          maturin-version: "v0.13.0"
       - name: Install built wheel - x86_64
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
@@ -62,7 +62,6 @@ jobs:
         uses: messense/maturin-action@v1
         with:
           args: --release --universal2 --out dist
-          maturin-version: "v0.13.0"
       - name: Install built wheel - universal2
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*universal2.whl --force-reinstall
@@ -94,7 +93,6 @@ jobs:
         with:
           target: ${{ matrix.target }}
           args: --release --out dist
-          maturin-version: "v0.13.0"
       - name: Install built wheel
         shell: bash
         run: |
@@ -122,7 +120,6 @@ jobs:
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist
-          maturin-version: "v0.13.0"
       - name: Install built wheel
         if: matrix.target == 'x86_64'
         run: |
@@ -149,7 +146,6 @@ jobs:
           target: ${{ matrix.target }}
           manylinux: auto
           args: --no-default-features --release --out dist
-          maturin-version: "v0.13.0"
       - uses: uraimo/run-on-arch-action@v2.0.5
         if: matrix.target != 'ppc64'
         name: Install built wheel
@@ -188,7 +184,6 @@ jobs:
           target: ${{ matrix.target }}
           manylinux: musllinux_1_2
           args: --release --out dist
-          maturin-version: "v0.13.0"
       - name: Install built wheel
         if: matrix.target == 'x86_64-unknown-linux-musl'
         uses: addnab/docker-run-action@v3
@@ -224,7 +219,6 @@ jobs:
           target: ${{ matrix.platform.target }}
           manylinux: musllinux_1_2
           args: --release --out dist
-          maturin-version: "v0.13.0"
       - uses: uraimo/run-on-arch-action@master
         name: Install built wheel
         with:
@@ -262,7 +256,6 @@ jobs:
       - name: Build wheels
         uses: messense/maturin-action@v1
         with:
-          maturin-version: "v0.13.0"
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist -i pypy${{ matrix.python-version }}
@@ -297,7 +290,7 @@ jobs:
       - name: Publish to PyPi
         env:
           TWINE_USERNAME: __token__
-          TWINE_PASSWORD: ${{ secrets.PYPI_TOKEN }}
+          TWINE_PASSWORD: ${{ secrets.RUFF_TOKEN }}
         run: |
           pip install --upgrade twine
           twine upload --skip-existing *

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.90
+    rev: v0.0.141
     hooks:
       - id: ruff
 

CONTRIBUTING.md

@@ -1,17 +1,17 @@
-# Contributing to ruff
+# Contributing to Ruff
 
-Welcome! We're happy to have you here. Thank you in advance for your contribution to ruff.
+Welcome! We're happy to have you here. Thank you in advance for your contribution to Ruff.
 
 ## The basics
 
-ruff welcomes contributions in the form of Pull Requests. For small changes (e.g., bug fixes), feel
+Ruff welcomes contributions in the form of Pull Requests. For small changes (e.g., bug fixes), feel
 free to submit a PR. For larger changes (e.g., new lint rules, new functionality, new configuration
 options), consider submitting an [Issue](https://github.com/charliermarsh/ruff/issues) outlining
 your proposed change.
 
 ### Prerequisites
 
-ruff is written in Rust (1.63.0). You'll need to install the
+Ruff is written in Rust. You'll need to install the
 [Rust toolchain](https://www.rust-lang.org/tools/install) for development.
 
 You'll also need [Insta](https://insta.rs/docs/) to update snapshot tests:
@@ -22,7 +22,7 @@ cargo install cargo-insta
 
 ### Development
 
-After cloning the repository, run ruff locally with:
+After cloning the repository, run Ruff locally with:
 
 ```shell
 cargo run resources/test/fixtures --no-cache
@@ -32,9 +32,9 @@ Prior to opening a pull request, ensure that your code has been auto-formatted,
 both the lint and test validation checks:
 
 ```shell
-cargo fmt     # Auto-formatting...
-cargo clippy  # Linting...
-cargo test    # Testing...
+cargo +nightly fmt --all     # Auto-formatting...
+cargo +nightly clippy --all  # Linting...
+cargo +nightly test --all    # Testing...
 ```
 
 These checks will run on GitHub Actions when you open your Pull Request, but running them locally
@@ -45,12 +45,13 @@ prior to merging.
 
 ### Example: Adding a new lint rule
 
-There are three phases to adding a new lint rule:
+There are four phases to adding a new lint rule:
 
 1. Define the rule in `src/checks.rs`.
-2. Define the _logic_ for triggering the rule in `src/check_ast.rs` (for AST-based checks)
-   or `src/check_lines.rs` (for text-based checks).
+2. Define the _logic_ for triggering the rule in `src/check_ast.rs` (for AST-based checks),
+   `src/check_tokens.rs` (for token-based checks), or `src/check_lines.rs` (for text-based checks).
 3. Add a test fixture.
+4. Update the generated files (documentation and generated code).
 
 To define the rule, open up `src/checks.rs`. You'll need to define both a `CheckCode` and
 `CheckKind`. As an example, you can grep for `E402` and `ModuleImportNotAtTopOfFile`, and follow the
@@ -58,37 +59,33 @@ pattern implemented therein.
 
 To trigger the rule, you'll likely want to augment the logic in `src/check_ast.rs`, which defines
 the Python AST visitor, responsible for iterating over the abstract syntax tree and collecting
-lint-rule violations as it goes. Grep for the `Check::new` invocations to understand how other,
-similar rules are implemented.
+lint-rule violations as it goes. If you need to inspect the AST, you can run `cargo dev print-ast`
+with a Python file. Grep for the `Check::new` invocations to understand how other, similar rules
+are implemented.
 
 To add a test fixture, create a file under `resources/test/fixtures`, named to match the `CheckCode`
 you defined earlier (e.g., `E402.py`). This file should contain a variety of violations and
-non-violations designed to evaluate and demonstrate the behavior of your lint rule. Run ruff locally
-with (e.g.) `cargo run resources/test/fixtures/E402.py`. Once you're satisfied with the output,
-codify the behavior as a snapshot test by adding a new function to the `mod tests` section of
-`src/linter.rs`, like so:
+non-violations designed to evaluate and demonstrate the behavior of your lint rule. Run Ruff locally
+with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache`. Once you're satisfied with the
+output, codify the behavior as a snapshot test by adding a new `testcase` macro to the `mod tests`
+section of `src/linter.rs`, like so:
 
 ```rust
-#[test]
-fn e402() -> Result<()> {
-    let mut checks = check_path(
-        Path::new("./resources/test/fixtures/E402.py"),
-        &settings::Settings::for_rule(CheckCode::E402),
-        &fixer::Mode::Generate,
-    )?;
-    checks.sort_by_key(|check| check.location);
-    insta::assert_yaml_snapshot!(checks);
-    Ok(())
-}
+#[test_case(CheckCode::A001, Path::new("A001.py"); "A001")]
+...
 ```
 
 Then, run `cargo test`. Your test will fail, but you'll be prompted to follow-up with
 `cargo insta review`. Accept the generated snapshot, then commit the snapshot file alongside the
 rest of your changes.
 
+Finally, to update the documentation, run `cargo dev generate-rules-table` from the repo root. To
+update the generated prefix map, run `cargo dev generate-check-code-prefix`. Both of these commands
+should be run whenever a new check is added to the codebase.
+
 ### Example: Adding a new configuration option
 
-ruff's user-facing settings live in two places: first, the command-line options defined with
+Ruff's user-facing settings live in two places: first, the command-line options defined with
 [clap](https://docs.rs/clap/latest/clap/) via the `Cli` struct in `src/main.rs`; and second, the
 `Config` struct defined `src/pyproject.rs`, which is responsible for extracting user-defined
 settings from a `pyproject.toml` file.
@@ -101,11 +98,18 @@ _and_ a `pyproject.toml` parameter to `src/pyproject.rs`. If you want to pattern
 existing example, grep for `dummy_variable_rgx`, which defines a regular expression to match against
 acceptable unused variables (e.g., `_`).
 
+If the new plugin's configuration should be cached between runs, you'll need to add it to the
+`Hash` implementation for `Settings` in `src/settings/mod.rs`.
+
+You may also want to add the new configuration option to the `flake8-to-ruff` tool, which is
+responsible for converting `flake8` configuration files to Ruff's TOML format. This logic
+lives in `flake8_to_ruff/src/converter.rs`.
+
 ## Release process
 
-As of now, ruff has an ad hoc release process: releases are cut with high frequency via GitHub
+As of now, Ruff has an ad hoc release process: releases are cut with high frequency via GitHub
 Actions, which automatically generates the appropriate wheels across architectures and publishes
 them to [PyPI](https://pypi.org/project/ruff/).
 
-ruff follows the [semver](https://semver.org/) versioning standard. However, as pre-1.0 software,
+Ruff follows the [semver](https://semver.org/) versioning standard. However, as pre-1.0 software,
 even patch releases may contain [non-backwards-compatible changes](https://semver.org/#spec-item-4).

Cargo.toml

@@ -1,46 +1,59 @@
+[workspace]
+members = [
+  "flake8_to_ruff",
+  "ruff_dev",
+]
+
 [package]
 name = "ruff"
-version = "0.0.90"
+version = "0.0.141"
 edition = "2021"
+rust-version = "1.65.0"
 
 [lib]
 name = "ruff"
 
 [dependencies]
-anyhow = { version = "1.0.60" }
+annotate-snippets = { version = "0.9.1", features = ["color"] }
+anyhow = { version = "1.0.66" }
+atty = { version = "0.2.14" }
 bincode = { version = "1.3.3" }
-chrono = { version = "0.4.21" }
+bitflags = { version = "1.3.2" }
+cachedir = { version = "0.3.0" }
+chrono = { version = "0.4.21", default-features = false, features = ["clock"] }
 clap = { version = "4.0.1", features = ["derive"] }
 colored = { version = "2.0.0" }
 common-path = { version = "1.0.0" }
 dirs = { version = "4.0.0" }
 fern = { version = "0.6.1" }
 filetime = { version = "0.2.17" }
-glob = { version = "0.3.0" }
+globset = {version = "0.4.9" }
 itertools = { version = "0.10.5" }
-libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "32a044c127668df44582f85699358e67803b0d73" }
+libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "f2f0b7a487a8725d161fe8b3ed73a6758b21e177" }
 log = { version = "0.4.17" }
+nohash-hasher = { version = "0.2.0" }
 notify = { version = "4.0.17" }
 num-bigint = { version = "0.4.3" }
-once_cell = { version = "1.13.1" }
+once_cell = { version = "1.16.0" }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
 rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/charliermarsh/RustPython.git", rev = "1b253a12705f84972cd76e8dc1cdaaccb233e5a5" }
-rustpython-common = { git = "https://github.com/charliermarsh/RustPython.git", rev = "1b253a12705f84972cd76e8dc1cdaaccb233e5a5" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/charliermarsh/RustPython.git", rev = "1b253a12705f84972cd76e8dc1cdaaccb233e5a5" }
-serde = { version = "1.0.143", features = ["derive"] }
-serde_json = { version = "1.0.83" }
+ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
+rustc-hash = { version = "1.1.0" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "f885db8c61514f069979861f6b3bd83292086231" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "f885db8c61514f069979861f6b3bd83292086231" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "f885db8c61514f069979861f6b3bd83292086231" }
+serde = { version = "1.0.147", features = ["derive"] }
+serde_json = { version = "1.0.87" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
-textwrap = { version = "0.15.1" }
+textwrap = { version = "0.16.0" }
 titlecase = { version = "2.2.1" }
 toml = { version = "0.5.9" }
-update-informer = { version = "0.5.0", default_features = false, features = ["pypi"], optional = true }
+update-informer = { version = "0.5.0", default-features = false, features = ["pypi"], optional = true }
 walkdir = { version = "2.3.2" }
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
-cacache = { version = "10.0.1" } # uses async-std
 clearscreen = { version = "1.0.10" } # uses which
 
 # https://docs.rs/getrandom/0.2.7/getrandom/#webassembly-support
@@ -50,7 +63,7 @@ getrandom = { version = "0.2.7", features = ["js"] }
 
 [dev-dependencies]
 assert_cmd = { version = "2.0.4" }
-codegen = { version = "0.2.0" }
+criterion = { version = "0.4.0" }
 insta = { version = "1.19.1", features = ["yaml"] }
 test-case = { version = "2.2.2" }
 
@@ -69,3 +82,7 @@ opt-level = 3
 
 [profile.dev.package.similar]
 opt-level = 3
+
+[[bench]]
+name = "source_code_locator"
+harness = false

LICENSE

@@ -19,3 +19,477 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+The externally maintained libraries from which parts of the Software is derived
+are:
+
+- Pyflakes, licensed as follows:
+  """
+    Copyright 2005-2011 Divmod, Inc.
+    Copyright 2013-2014 Florent Xicluna
+
+    Permission is hereby granted, free of charge, to any person obtaining
+    a copy of this software and associated documentation files (the
+    "Software"), to deal in the Software without restriction, including
+    without limitation the rights to use, copy, modify, merge, publish,
+    distribute, sublicense, and/or sell copies of the Software, and to
+    permit persons to whom the Software is furnished to do so, subject to
+    the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  """
+
+- autoflake, licensed as follows:
+  """
+    Copyright (C) 2012-2018 Steven Myint
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy of
+    this software and associated documentation files (the "Software"), to deal in
+    the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is furnished to do
+    so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- Flake8, licensed as follows:
+  """
+    == Flake8 License (MIT) ==
+
+    Copyright (C) 2011-2013 Tarek Ziade <tarek@ziade.org>
+    Copyright (C) 2012-2016 Ian Cordasco <graffatcolmingov@gmail.com>
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy of
+    this software and associated documentation files (the "Software"), to deal in
+    the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is furnished to do
+    so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-2020, licensed as follows:
+  """
+    Copyright (c) 2019 Anthony Sottile
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
+- flake8-annotations, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2019 - Present S. Co1
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-bandit, licensed as follows:
+  """
+    Copyright (c) 2017 Tyler Wince
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
+- flake8-blind-except, licensed as follows:
+  """
+    The MIT License (MIT)
+
+    Copyright (c) 2014 Elijah Andrews
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy of
+    this software and associated documentation files (the "Software"), to deal in
+    the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+    the Software, and to permit persons to whom the Software is furnished to do so,
+    subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+    FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+    COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+    IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  """
+
+- flake8-bugbear, licensed as follows:
+  """
+    The MIT License (MIT)
+
+    Copyright (c) 2016 Łukasz Langa
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-comprehensions, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2017 Adam Johnson
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-debugger, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2016 Joseph Kahn
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-tidy-imports, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2017 Adam Johnson
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-print, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2016 Joseph Kahn
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-quotes, licensed as follows:
+  """
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
+- isort, licensed as follows:
+  """
+    The MIT License (MIT)
+
+    Copyright (c) 2013 Timothy Edmund Crosley
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
+- pep8-naming, licensed as follows:
+  """
+    Copyright © 2013 Florent Xicluna <florent.xicluna@gmail.com>
+
+    Licensed under the terms of the Expat License
+
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation files
+    (the "Software"), to deal in the Software without restriction,
+    including without limitation the rights to use, copy, modify, merge,
+    publish, distribute, sublicense, and/or sell copies of the Software,
+    and to permit persons to whom the Software is furnished to do so,
+    subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+    BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+    ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- pycodestyle, licensed as follows:
+  """
+    Copyright © 2006-2009 Johann C. Rocholl <johann@rocholl.net>
+    Copyright © 2009-2014 Florent Xicluna <florent.xicluna@gmail.com>
+    Copyright © 2014-2020 Ian Lee <IanLee1521@gmail.com>
+
+    Licensed under the terms of the Expat License
+
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation files
+    (the "Software"), to deal in the Software without restriction,
+    including without limitation the rights to use, copy, modify, merge,
+    publish, distribute, sublicense, and/or sell copies of the Software,
+    and to permit persons to whom the Software is furnished to do so,
+    subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+    BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+    ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- pydocstyle, licensed as follows:
+  """
+    Copyright (c) 2012 GreenSteam, <http://greensteam.dk/>
+
+    Copyright (c) 2014-2020 Amir Rachum, <http://amir.rachum.com/>
+
+    Copyright (c) 2020 Sambhav Kothari, <https://github.com/samj1912>
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy of
+    this software and associated documentation files (the "Software"), to deal in
+    the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is furnished to do
+    so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- pyupgrade, licensed as follows:
+  """
+    Copyright (c) 2017 Anthony Sottile
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
+- RustPython, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2020 RustPython Team
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """

README.md

@@ -15,48 +15,67 @@ An extremely fast Python linter, written in Rust.
   <i>Linting the CPython codebase from scratch.</i>
 </p>
 
-- ⚡️ 10-100x faster than existing linters
-- 🐍 Installable via `pip`
-- 🤝 Python 3.10 compatibility
-- 🛠️ `pyproject.toml` support
-- 📦 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#caching)-inspired cache support
-- 🔧 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix)-inspired autofix support (e.g., automatically remove unused imports)
-- 👀 [TypeScript](https://www.typescriptlang.org/docs/handbook/configuring-watch.html)-inspired `--watch` support, for continuous file monitoring
-- ⚖️ [Near-parity](#how-does-ruff-compare-to-flake8) with the built-in Flake8 rule set
-- 🔌 Native re-implementations of popular Flake8 plugins, like [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/) ([`pydocstyle`](https://pypi.org/project/pydocstyle/))
+- ⚡️  10-100x faster than existing linters
+- 🐍  Installable via `pip`
+- 🤝  Python 3.10 compatibility
+- 🛠️  `pyproject.toml` support
+- 📦  Built-in caching, to avoid re-analyzing unchanged files
+- 🔧  `--fix` support, for automatic error correction (e.g., automatically remove unused imports)
+- 👀  `--watch` support, for continuous file monitoring
+- ⚖️  [Near-parity](#how-does-ruff-compare-to-flake8) with the built-in Flake8 rule set
+- 🔌  Native re-implementations of popular Flake8 plugins, like [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/) ([`pydocstyle`](https://pypi.org/project/pydocstyle/))
 
 Ruff aims to be orders of magnitude faster than alternative tools while integrating more
 functionality behind a single, common interface. Ruff can be used to replace Flake8 (plus a variety
-of plugins), [`pydocstyle`](https://pypi.org/project/pydocstyle/), [`yesqa`](https://github.com/asottile/yesqa),
-and even a subset of [`pyupgrade`](https://pypi.org/project/pyupgrade/) and [`autoflake`](https://pypi.org/project/autoflake/)
-all while executing tens or hundreds of times faster than any individual tool.
+of plugins), [`isort`](https://pypi.org/project/isort/), [`pydocstyle`](https://pypi.org/project/pydocstyle/),
+[`yesqa`](https://github.com/asottile/yesqa), and even a subset of [`pyupgrade`](https://pypi.org/project/pyupgrade/)
+and [`autoflake`](https://pypi.org/project/autoflake/) all while executing tens or hundreds of times
+faster than any individual tool.
+
+Ruff is actively developed and used in major open-source projects like:
+
+- [FastAPI](https://github.com/tiangolo/fastapi)
+- [Bokeh](https://github.com/bokeh/bokeh)
+- [Zulip](https://github.com/zulip/zulip)
+- [Pydantic](https://github.com/pydantic/pydantic)
+- [Saleor](https://github.com/saleor/saleor)
+- [Hatch](https://github.com/pypa/hatch)
 
 Read the [launch blog post](https://notes.crmarsh.com/python-tooling-could-be-much-much-faster).
 
 ## Table of Contents
 
 1. [Installation and Usage](#installation-and-usage)
-2. [Configuration](#configuration)
-3. [Supported Rules](#supported-rules)
-   1. [Pyflakes](#pyflakes)
-   2. [pycodestyle (error)](#pycodestyle-error)
-   3. [pycodestyle (warning)](#pycodestyle-warning)
-   4. [pydocstyle](#pydocstyle)
-   5. [pyupgrade](#pyupgrade)
-   6. [pep8-naming](#pep8-naming)
-   7. [flake8-comprehensions](#flake8-comprehensions)
-   8. [flake8-bugbear](#flake8-bugbear)
-   9. [flake8-builtins](#flake8-builtins)
-   10. [flake8-print](#flake8-print)
-   11. [flake8-quotes](#flake8-quotes)
-   12. [Meta rules](#meta-rules)
-5. [Editor Integrations](#editor-integrations)
-6. [FAQ](#faq)
-7. [Development](#development)
-8. [Releases](#releases)
-9. [Benchmarks](#benchmarks)
-10. [License](#license)
-11. [Contributing](#contributing)
+1. [Configuration](#configuration)
+1. [Supported Rules](#supported-rules)
+   1. [Pyflakes (F)](#pyflakes)
+   1. [pycodestyle (E)](#pycodestyle)
+   1. [isort (I)](#isort)
+   1. [pydocstyle (D)](#pydocstyle)
+   1. [pyupgrade (U)](#pyupgrade)
+   1. [pep8-naming (N)](#pep8-naming)
+   1. [flake8-bandit (S)](#flake8-bandit)
+   1. [flake8-comprehensions (C)](#flake8-comprehensions)
+   1. [flake8-boolean-trap (FBT)](#flake8-boolean-trap)
+   1. [flake8-bugbear (B)](#flake8-bugbear)
+   1. [flake8-builtins (A)](#flake8-builtins)
+   1. [flake8-debugger (T)](#flake8-debugger)
+   1. [flake8-tidy-imports (I25)](#flake8-tidy-imports)
+   1. [flake8-print (T)](#flake8-print)
+   1. [flake8-quotes (Q)](#flake8-quotes)
+   1. [flake8-annotations (ANN)](#flake8-annotations)
+   1. [flake8-2020 (YTT)](#flake8-2020)
+   1. [flake8-blind-except (BLE)](#flake8-blind-except)
+   1. [mccabe (C90)](#mccabe)
+   1. [Ruff-specific rules (RUF)](#ruff-specific-rules)
+   1. [Meta rules (M)](#meta-rules)
+1. [Editor Integrations](#editor-integrations)
+1. [FAQ](#faq)
+1. [Development](#development)
+1. [Releases](#releases)
+1. [Benchmarks](#benchmarks)
+1. [License](#license)
+1. [Contributing](#contributing)
 
 ## Installation and Usage
 
@@ -89,7 +108,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 repos:
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.90
+    rev: v0.0.141
     hooks:
       - id: ruff
 ```
@@ -99,26 +118,78 @@ _Note: prior to `v0.0.86`, `ruff-pre-commit` used `lint` (rather than `ruff`) as
 
 ## Configuration
 
-Ruff is configurable both via `pyproject.toml` and the command line.
-
-For example, you could configure Ruff to only enforce a subset of rules with:
+Ruff is configurable both via `pyproject.toml` and the command line. If left unspecified, the
+default configuration is equivalent to:
 
 ```toml
 [tool.ruff]
 line-length = 88
+
+# Enable Pyflakes `E` and `F` codes by default.
 select = ["E", "F"]
-ignore = ["E501"]
-per-file-ignores = [
-    "__init__.py:F401",
-    "path/to/file.py:F401"
+ignore = []
+
+# Exclude a variety of commonly ignored directories.
+exclude = [
+    ".bzr",
+    ".direnv",
+    ".eggs",
+    ".git",
+    ".hg",
+    ".mypy_cache",
+    ".nox",
+    ".pants.d",
+    ".ruff_cache",
+    ".svn",
+    ".tox",
+    ".venv",
+    "__pypackages__",
+    "_build",
+    "buck-out",
+    "build",
+    "dist",
+    "node_modules",
+    "venv",
 ]
+per-file-ignores = {}
+
+# Allow unused variables when underscore-prefixed.
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+# Assume Python 3.10.
+target-version = "py310"
+
+[tool.ruff.mccabe]
+# Unlike Flake8, default to a complexity level of 10.
+max-complexity = 10
+```
+
+As an example, the following would configure Ruff to: (1) avoid checking for line-length
+violations (`E501`); (2), always autofix, but never remove unused imports (`F401`); and (3) ignore
+import-at-top-of-file errors (`E402`) in `__init__.py` files:
+
+```toml
+[tool.ruff]
+# Enable Pyflakes and pycodestyle rules.
+select = ["E", "F"]
+
+# Never enforce `E501` (line length violations).
+ignore = ["E501"]
+
+# Always autofix, but never try to fix `F401` (unused imports).
+fix = true
+unfixable = ["F401"]
+
+# Ignore `E402` (import violations in any `__init__.py` file, and in `path/to/file.py`.
+per-file-ignores = {"__init__.py" = ["E402"], "path/to/file.py" = ["E402"]}
 ```
 
 Plugin configurations should be expressed as subsections, e.g.:
 
 ```toml
 [tool.ruff]
-line-length = 88
+# Add "Q" to the list of enabled codes.
+select = ["E", "F", "Q"]
 
 [tool.ruff.flake8-quotes]
 docstring-quotes = "double"
@@ -133,7 +204,7 @@ ruff path/to/code/ --select F401 --select F403
 See `ruff --help` for more:
 
 ```shell
-ruff: An extremely fast Python linter.
+Ruff: An extremely fast Python linter.
 
 Usage: ruff [OPTIONS] <FILES>...
 
@@ -146,12 +217,14 @@ Options:
   -v, --verbose
           Enable verbose logging
   -q, --quiet
+          Only log errors
+  -s, --silent
           Disable all logging (but still exit with status code "1" upon detecting errors)
   -e, --exit-zero
           Exit with status code "0", even upon detecting errors
   -w, --watch
           Run in watch mode by re-running whenever files change
-  -f, --fix
+      --fix
           Attempt to automatically fix lint errors
   -n, --no-cache
           Disable cache reads
@@ -167,20 +240,30 @@ Options:
           List of paths, used to exclude files and/or directories from checks
       --extend-exclude <EXTEND_EXCLUDE>
           Like --exclude, but adds additional files and directories on top of the excluded ones
+      --fixable <FIXABLE>
+          List of error codes to treat as eligible for autofix. Only applicable when autofix itself is enabled (e.g., via `--fix`)
+      --unfixable <UNFIXABLE>
+          List of error codes to treat as ineligible for autofix. Only applicable when autofix itself is enabled (e.g., via `--fix`)
       --per-file-ignores <PER_FILE_IGNORES>
           List of mappings from file pattern to code to exclude
       --format <FORMAT>
           Output serialization format for error messages [default: text] [possible values: text, json]
+      --show-source
+          Show violations with source code
       --show-files
-          See the files ruff will be run against with the current settings
+          See the files Ruff will be run against with the current settings
       --show-settings
-          See ruff's settings
+          See Ruff's settings
       --add-noqa
           Enable automatic additions of noqa directives to failing lines
       --dummy-variable-rgx <DUMMY_VARIABLE_RGX>
           Regular expression matching the name of dummy variables
       --target-version <TARGET_VERSION>
           The minimum Python version that should be supported
+      --line-length <LINE_LENGTH>
+          Set the line-length for length-associated checks and automatic formatting
+      --max-complexity <MAX_COMPLEXITY>
+          Max McCabe complexity allowed for a function
       --stdin-filename <STDIN_FILENAME>
           The name of the file when passing it through stdin
   -h, --help
@@ -203,7 +286,7 @@ Exclusions are based on globs, and can be either:
 ### Ignoring errors
 
 To omit a lint check entirely, add it to the "ignore" list via `--ignore` or `--extend-ignore`,
-either  on the command-line or in your `project.toml` file.
+either on the command-line or in your `project.toml` file.
 
 To ignore an error in-line, Ruff uses a `noqa` system similar to [Flake8](https://flake8.pycqa.org/en/3.1.1/user/ignoring-errors.html).
 To ignore an individual error, add `# noqa: {code}` to the end of the line, like so:
@@ -233,25 +316,32 @@ Ruff supports several workflows to aid in `noqa` management.
 
 First, Ruff provides a special error code, `M001`, to enforce that your `noqa` directives are
 "valid", in that the errors they _say_ they ignore are actually being triggered on that line (and
-thus suppressed). **You can run `ruff /path/to/file.py --extend-select M001` to flag unused `noqa`
-directives.**
+thus suppressed). You can run `ruff /path/to/file.py --extend-select M001` to flag unused `noqa`
+directives.
 
 Second, Ruff can _automatically remove_ unused `noqa` directives via its autofix functionality.
-**You can run `ruff /path/to/file.py --extend-select M001 --fix` to automatically remove unused
-`noqa` directives.**
+You can run `ruff /path/to/file.py --extend-select M001 --fix` to automatically remove unused
+`noqa` directives.
 
 Third, Ruff can _automatically add_ `noqa` directives to all failing lines. This is useful when
-migrating a new codebase to Ruff. **You can run `ruff /path/to/file.py --add-noqa` to automatically
-add `noqa` directives to all failing lines, with the appropriate error codes.**
+migrating a new codebase to Ruff. You can run `ruff /path/to/file.py --add-noqa` to automatically
+add `noqa` directives to all failing lines, with the appropriate error codes.
 
 ## Supported Rules
 
+Regardless of the rule's origin, Ruff re-implements every rule in Rust as a first-party feature.
+
 By default, Ruff enables all `E` and `F` error codes, which correspond to those built-in to Flake8.
 
 The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` command-line option.
 
+<!-- Sections automatically generated by `cargo dev generate-rules-table`. -->
+<!-- Begin auto-generated sections. -->
+
 ### Pyflakes
 
+For more, see [Pyflakes](https://pypi.org/project/pyflakes/2.5.0/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | F401 | UnusedImport | `...` imported but unused | 🛠 |
@@ -261,56 +351,68 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | F405 | ImportStarUsage | `...` may be undefined, or defined from star imports: `...` |  |
 | F406 | ImportStarNotPermitted | `from ... import *` only allowed at module level |  |
 | F407 | FutureFeatureNotDefined | Future feature `...` is not defined |  |
+| F521 | StringDotFormatInvalidFormat | '...'.format(...) has invalid format string: ... |  |
+| F522 | StringDotFormatExtraNamedArguments | '...'.format(...) has unused named argument(s): ... |  |
+| F523 | StringDotFormatExtraPositionalArguments | '...'.format(...) has unused arguments at position(s): ... |  |
+| F524 | StringDotFormatMissingArguments | '...'.format(...) is missing argument(s) for placeholder(s): ... |  |
+| F525 | StringDotFormatMixingAutomatic | '...'.format(...) mixes automatic and manual numbering |  |
 | F541 | FStringMissingPlaceholders | f-string without any placeholders |  |
 | F601 | MultiValueRepeatedKeyLiteral | Dictionary key literal repeated |  |
 | F602 | MultiValueRepeatedKeyVariable | Dictionary key `...` repeated |  |
 | F621 | ExpressionsInStarAssignment | Too many expressions in star-unpacking assignment |  |
 | F622 | TwoStarredExpressions | Two starred expressions in assignment |  |
 | F631 | AssertTuple | Assert test is a non-empty tuple, which is always `True` |  |
-| F632 | IsLiteral | Use `==` and `!=` to compare constant literals |  |
+| F632 | IsLiteral | Use `==` and `!=` to compare constant literals | 🛠 |
 | F633 | InvalidPrintSyntax | Use of `>>` is invalid with `print` function |  |
 | F634 | IfTuple | If test is a tuple, which is always `True` |  |
 | F701 | BreakOutsideLoop | `break` outside loop |  |
 | F702 | ContinueOutsideLoop | `continue` not properly in loop |  |
-| F704 | YieldOutsideFunction | `yield` or `yield from` statement outside of a function/method |  |
+| F704 | YieldOutsideFunction | `yield` or `yield from` statement outside of a function |  |
 | F706 | ReturnOutsideFunction | `return` statement outside of a function/method |  |
-| F707 | DefaultExceptNotLast | An `except:` block as not the last exception handler |  |
+| F707 | DefaultExceptNotLast | An `except` block as not the last exception handler |  |
 | F722 | ForwardAnnotationSyntaxError | Syntax error in forward annotation: `...` |  |
 | F821 | UndefinedName | Undefined name `...` |  |
 | F822 | UndefinedExport | Undefined name `...` in `__all__` |  |
 | F823 | UndefinedLocal | Local variable `...` referenced before assignment |  |
 | F831 | DuplicateArgumentName | Duplicate argument name in function definition |  |
 | F841 | UnusedVariable | Local variable `...` is assigned to but never used |  |
-| F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` |  |
+| F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` | 🛠 |
 
-### pycodestyle (error)
+### pycodestyle
+
+For more, see [pycodestyle](https://pypi.org/project/pycodestyle/2.9.1/) on PyPI.
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | E402 | ModuleImportNotAtTopOfFile | Module level import not at top of file |  |
 | E501 | LineTooLong | Line too long (89 > 88 characters) |  |
-| E711 | NoneComparison | Comparison to `None` should be `cond is None` |  |
-| E712 | TrueFalseComparison | Comparison to `True` should be `cond is True` |  |
-| E713 | NotInTest | Test for membership should be `not in` |  |
-| E714 | NotIsTest | Test for object identity should be `is not` |  |
+| E711 | NoneComparison | Comparison to `None` should be `cond is None` | 🛠 |
+| E712 | TrueFalseComparison | Comparison to `True` should be `cond is True` | 🛠 |
+| E713 | NotInTest | Test for membership should be `not in` | 🛠 |
+| E714 | NotIsTest | Test for object identity should be `is not` | 🛠 |
 | E721 | TypeComparison | Do not compare types, use `isinstance()` |  |
 | E722 | DoNotUseBareExcept | Do not use bare `except` |  |
-| E731 | DoNotAssignLambda | Do not assign a lambda expression, use a def |  |
+| E731 | DoNotAssignLambda | Do not assign a lambda expression, use a def | 🛠 |
 | E741 | AmbiguousVariableName | Ambiguous variable name: `...` |  |
 | E742 | AmbiguousClassName | Ambiguous class name: `...` |  |
 | E743 | AmbiguousFunctionName | Ambiguous function name: `...` |  |
 | E902 | IOError | IOError: `...` |  |
 | E999 | SyntaxError | SyntaxError: `...` |  |
-
-### pycodestyle (warning)
-
-| Code | Name | Message | Fix |
-| ---- | ---- | ------- | --- |
 | W292 | NoNewLineAtEndOfFile | No newline at end of file |  |
 | W605 | InvalidEscapeSequence | Invalid escape sequence: '\c' |  |
 
+### isort
+
+For more, see [isort](https://pypi.org/project/isort/5.10.1/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| I001 | UnsortedImports | Import block is un-sorted or un-formatted | 🛠 |
+
 ### pydocstyle
 
+For more, see [pydocstyle](https://pypi.org/project/pydocstyle/6.1.1/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | D100 | PublicModule | Missing docstring in public module |  |
@@ -341,7 +443,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | D400 | EndsInPeriod | First line should end with a period |  |
 | D402 | NoSignature | First line should not be the function's signature |  |
 | D403 | FirstLineCapitalized | First word of the first line should be properly capitalized |  |
-| D404 | NoThisPrefix | First word of the docstring should not be `This` |  |
+| D404 | NoThisPrefix | First word of the docstring should not be "This" |  |
 | D405 | CapitalizeSectionName | Section name should be properly capitalized ("returns") | 🛠 |
 | D406 | NewLineAfterSectionName | Section name should end with a newline ("Returns") | 🛠 |
 | D407 | DashedUnderlineAfterSection | Missing dashed underline after section ("Returns") | 🛠 |
@@ -355,24 +457,34 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | D415 | EndsInPunctuation | First line should end with a period, question mark, or exclamation point |  |
 | D416 | SectionNameEndsInColon | Section name should end with a colon ("Returns") | 🛠 |
 | D417 | DocumentAllArguments | Missing argument descriptions in the docstring: `x`, `y` |  |
-| D418 | SkipDocstring | Function decorated with @overload shouldn't contain a docstring |  |
+| D418 | SkipDocstring | Function decorated with `@overload` shouldn't contain a docstring |  |
 | D419 | NonEmpty | Docstring is empty |  |
 
 ### pyupgrade
 
+For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | U001 | UselessMetaclassType | `__metaclass__ = type` is implied | 🛠 |
-| U002 | UnnecessaryAbspath | `abspath(__file__)` is unnecessary in Python 3.9 and later | 🛠 |
 | U003 | TypeOfPrimitive | Use `str` instead of `type(...)` | 🛠 |
 | U004 | UselessObjectInheritance | Class `...` inherits from object | 🛠 |
 | U005 | DeprecatedUnittestAlias | `assertEquals` is deprecated, use `assertEqual` instead | 🛠 |
 | U006 | UsePEP585Annotation | Use `list` instead of `List` for type annotations | 🛠 |
 | U007 | UsePEP604Annotation | Use `X \| Y` for type annotations | 🛠 |
 | U008 | SuperCallWithParameters | Use `super()` instead of `super(__class__, self)` | 🛠 |
+| U009 | PEP3120UnnecessaryCodingComment | UTF-8 encoding declaration is unnecessary | 🛠 |
+| U010 | UnnecessaryFutureImport | Unnecessary `__future__` import `...` for target Python version | 🛠 |
+| U011 | UnnecessaryLRUCacheParams | Unnecessary parameters to `functools.lru_cache` | 🛠 |
+| U012 | UnnecessaryEncodeUTF8 | Unnecessary call to `encode` as UTF-8 | 🛠 |
+| U013 | ConvertTypedDictFunctionalToClass | Convert `...` from `TypedDict` functional to class syntax | 🛠 |
+| U014 | ConvertNamedTupleFunctionalToClass | Convert `...` from `NamedTuple` functional to class syntax | 🛠 |
+| U015 | RedundantOpenModes | Unnecessary open mode parameters | 🛠 |
 
 ### pep8-naming
 
+For more, see [pep8-naming](https://pypi.org/project/pep8-naming/0.13.2/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | N801 | InvalidClassName | Class name `...` should use CapWords convention  |  |
@@ -391,49 +503,116 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | N817 | CamelcaseImportedAsAcronym | Camelcase `...` imported as acronym `...` |  |
 | N818 | ErrorSuffixOnExceptionName | Exception name `...` should be named with an Error suffix |  |
 
-### flake8-comprehensions
+### flake8-bandit
+
+For more, see [flake8-bandit](https://pypi.org/project/flake8-bandit/4.1.1/) on PyPI.
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
-| C400 | UnnecessaryGeneratorList | Unnecessary generator (rewrite as a `list` comprehension) |  |
-| C401 | UnnecessaryGeneratorSet | Unnecessary generator (rewrite as a `set` comprehension) |  |
-| C402 | UnnecessaryGeneratorDict | Unnecessary generator (rewrite as a `dict` comprehension) |  |
-| C403 | UnnecessaryListComprehensionSet | Unnecessary `list` comprehension (rewrite as a `set` comprehension) |  |
-| C404 | UnnecessaryListComprehensionDict | Unnecessary `list` comprehension (rewrite as a `dict` comprehension) |  |
-| C405 | UnnecessaryLiteralSet | Unnecessary `(list\|tuple)` literal (rewrite as a `set` literal) |  |
-| C406 | UnnecessaryLiteralDict | Unnecessary `(list\|tuple)` literal (rewrite as a `dict` literal) |  |
-| C408 | UnnecessaryCollectionCall | Unnecessary `(dict\|list\|tuple)` call (rewrite as a literal) |  |
-| C409 | UnnecessaryLiteralWithinTupleCall | Unnecessary `(list\|tuple)` literal passed to `tuple()` (remove the outer call to `tuple()`) |  |
-| C410 | UnnecessaryLiteralWithinListCall | Unnecessary `(list\|tuple)` literal passed to `list()` (rewrite as a `list` literal) |  |
-| C411 | UnnecessaryListCall | Unnecessary `list` call (remove the outer call to `list()`) |  |
+| S101 | AssertUsed | Use of `assert` detected |  |
+| S102 | ExecUsed | Use of `exec` detected |  |
+| S104 | HardcodedBindAllInterfaces | Possible binding to all interfaces |  |
+| S105 | HardcodedPasswordString | Possible hardcoded password: `"..."` |  |
+| S106 | HardcodedPasswordFuncArg | Possible hardcoded password: `"..."` |  |
+| S107 | HardcodedPasswordDefault | Possible hardcoded password: `"..."` |  |
+
+### flake8-comprehensions
+
+For more, see [flake8-comprehensions](https://pypi.org/project/flake8-comprehensions/3.10.1/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| C400 | UnnecessaryGeneratorList | Unnecessary generator (rewrite as a `list` comprehension) | 🛠 |
+| C401 | UnnecessaryGeneratorSet | Unnecessary generator (rewrite as a `set` comprehension) | 🛠 |
+| C402 | UnnecessaryGeneratorDict | Unnecessary generator (rewrite as a `dict` comprehension) | 🛠 |
+| C403 | UnnecessaryListComprehensionSet | Unnecessary `list` comprehension (rewrite as a `set` comprehension) | 🛠 |
+| C404 | UnnecessaryListComprehensionDict | Unnecessary `list` comprehension (rewrite as a `dict` comprehension) | 🛠 |
+| C405 | UnnecessaryLiteralSet | Unnecessary `(list\|tuple)` literal (rewrite as a `set` literal) | 🛠 |
+| C406 | UnnecessaryLiteralDict | Unnecessary `(list\|tuple)` literal (rewrite as a `dict` literal) | 🛠 |
+| C408 | UnnecessaryCollectionCall | Unnecessary `(dict\|list\|tuple)` call (rewrite as a literal) | 🛠 |
+| C409 | UnnecessaryLiteralWithinTupleCall | Unnecessary `(list\|tuple)` literal passed to `tuple()` (remove the outer call to `tuple()`) | 🛠 |
+| C410 | UnnecessaryLiteralWithinListCall | Unnecessary `(list\|tuple)` literal passed to `list()` (rewrite as a `list` literal) | 🛠 |
+| C411 | UnnecessaryListCall | Unnecessary `list` call (remove the outer call to `list()`) | 🛠 |
 | C413 | UnnecessaryCallAroundSorted | Unnecessary `(list\|reversed)` call around `sorted()` |  |
 | C414 | UnnecessaryDoubleCastOrProcess | Unnecessary `(list\|reversed\|set\|sorted\|tuple)` call within `(list\|set\|sorted\|tuple)()` |  |
 | C415 | UnnecessarySubscriptReversal | Unnecessary subscript reversal of iterable within `(reversed\|set\|sorted)()` |  |
-| C416 | UnnecessaryComprehension | Unnecessary `(list\|set)` comprehension (rewrite using `(list\|set)()`) |  |
+| C416 | UnnecessaryComprehension | Unnecessary `(list\|set)` comprehension (rewrite using `(list\|set)()`) | 🛠 |
 | C417 | UnnecessaryMap | Unnecessary `map` usage (rewrite using a `(list\|set\|dict)` comprehension) |  |
 
-### flake8-bugbear
+### flake8-debugger
+
+For more, see [flake8-debugger](https://pypi.org/project/flake8-debugger/4.1.2/) on PyPI.
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
-| B002 | UnaryPrefixIncrement | Python does not support the unary prefix increment. |  |
-| B007 | UnusedLoopControlVariable | Loop control variable `i` not used within the loop body. | 🛠 |
+| T100 | Debugger | Import for `...` found |  |
+
+### flake8-boolean-trap
+
+For more, see [flake8-boolean-trap](https://pypi.org/project/flake8-boolean-trap/0.1.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| FBT001 | BooleanPositionalArgInFunctionDefinition | Boolean positional arg in function definition |  |
+| FBT002 | BooleanDefaultValueInFunctionDefinition | Boolean default value in function definition |  |
+| FBT003 | BooleanPositionalValueInFunctionCall | Boolean positional value in function call |  |
+
+### flake8-bugbear
+
+For more, see [flake8-bugbear](https://pypi.org/project/flake8-bugbear/22.10.27/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| B002 | UnaryPrefixIncrement | Python does not support the unary prefix increment |  |
+| B003 | AssignmentToOsEnviron | Assigning to `os.environ` doesn't clear the environment |  |
+| B004 | UnreliableCallableCheck |  Using `hasattr(x, '__call__')` to test if x is callable is unreliable. Use `callable(x)` for consistent results. |  |
+| B005 | StripWithMultiCharacters | Using `.strip()` with multi-character strings is misleading the reader |  |
+| B006 | MutableArgumentDefault | Do not use mutable data structures for argument defaults |  |
+| B007 | UnusedLoopControlVariable | Loop control variable `i` not used within the loop body | 🛠 |
+| B008 | FunctionCallArgumentDefault | Do not perform function call in argument defaults |  |
+| B009 | GetAttrWithConstant | Do not call `getattr` with a constant attribute value. It is not any safer than normal property access. | 🛠 |
+| B010 | SetAttrWithConstant | Do not call `setattr` with a constant attribute value. It is not any safer than normal property access. | 🛠 |
 | B011 | DoNotAssertFalse | Do not `assert False` (`python -O` removes these calls), raise `AssertionError()` | 🛠 |
-| B013 | RedundantTupleInExceptionHandler | A length-one tuple literal is redundant. Write `except ValueError:` instead of `except (ValueError,):`. |  |
+| B012 | JumpStatementInFinally | `return/continue/break` inside finally blocks cause exceptions to be silenced |  |
+| B013 | RedundantTupleInExceptionHandler | A length-one tuple literal is redundant. Write `except ValueError` instead of `except (ValueError,)`. | 🛠 |
 | B014 | DuplicateHandlerException | Exception handler with duplicate exception: `ValueError` | 🛠 |
-| B017 | NoAssertRaisesException | `assertRaises(Exception):` should be considered evil. |  |
+| B015 | UselessComparison | Pointless comparison. This comparison does nothing but waste CPU instructions. Either prepend `assert` or remove it. |  |
+| B016 | CannotRaiseLiteral | Cannot raise a literal. Did you intend to return it or raise an Exception? |  |
+| B017 | NoAssertRaisesException | `assertRaises(Exception)` should be considered evil |  |
+| B018 | UselessExpression | Found useless expression. Either assign it to a variable or remove it. |  |
+| B019 | CachedInstanceMethod | Use of `functools.lru_cache` or `functools.cache` on methods can lead to memory leaks |  |
+| B020 | LoopVariableOverridesIterator | Loop control variable `...` overrides iterable it iterates |  |
+| B021 | FStringDocstring | f-string used as docstring. This will be interpreted by python as a joined string rather than a docstring. |  |
+| B022 | UselessContextlibSuppress | No arguments passed to `contextlib.suppress`. No exceptions will be suppressed and therefore this context manager is redundant |  |
+| B023 | FunctionUsesLoopVariable | Function definition does not bind loop variable `...` |  |
+| B024 | AbstractBaseClassWithoutAbstractMethod | `...` is an abstract base class, but it has no abstract methods |  |
 | B025 | DuplicateTryBlockException | try-except block with duplicate exception `Exception` |  |
+| B026 | StarArgUnpackingAfterKeywordArg | Star-arg unpacking after a keyword argument is strongly discouraged |  |
+| B027 | EmptyMethodWithoutAbstractDecorator | `...` is an empty method in an abstract base class, but has no abstract decorator |  |
+| B904 | RaiseWithoutFromInsideExcept | Within an except clause, raise exceptions with raise ... from err or raise ... from None to distinguish them from errors in exception handling |  |
 
 ### flake8-builtins
 
+For more, see [flake8-builtins](https://pypi.org/project/flake8-builtins/2.0.1/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | A001 | BuiltinVariableShadowing | Variable `...` is shadowing a python builtin |  |
 | A002 | BuiltinArgumentShadowing | Argument `...` is shadowing a python builtin |  |
 | A003 | BuiltinAttributeShadowing | Class attribute `...` is shadowing a python builtin |  |
 
+### flake8-tidy-imports
+
+For more, see [flake8-tidy-imports](https://pypi.org/project/flake8-tidy-imports/4.8.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| I252 | BannedRelativeImport | Relative imports are banned |  |
+
 ### flake8-print
 
+For more, see [flake8-print](https://pypi.org/project/flake8-print/5.0.0/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | T201 | PrintFound | `print` found | 🛠 |
@@ -441,6 +620,8 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 
 ### flake8-quotes
 
+For more, see [flake8-quotes](https://pypi.org/project/flake8-quotes/3.3.1/) on PyPI.
+
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | Q000 | BadQuotesInlineString | Single quotes found but double quotes preferred |  |
@@ -448,14 +629,80 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | Q002 | BadQuotesDocstring | Single quote docstring found but double quotes preferred |  |
 | Q003 | AvoidQuoteEscape | Change outer quotes to avoid escaping inner quotes |  |
 
+### flake8-annotations
+
+For more, see [flake8-annotations](https://pypi.org/project/flake8-annotations/2.9.1/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| ANN001 | MissingTypeFunctionArgument | Missing type annotation for function argument `...` |  |
+| ANN002 | MissingTypeArgs | Missing type annotation for `*...` |  |
+| ANN003 | MissingTypeKwargs | Missing type annotation for `**...` |  |
+| ANN101 | MissingTypeSelf | Missing type annotation for `...` in method |  |
+| ANN102 | MissingTypeCls | Missing type annotation for `...` in classmethod |  |
+| ANN201 | MissingReturnTypePublicFunction | Missing return type annotation for public function `...` |  |
+| ANN202 | MissingReturnTypePrivateFunction | Missing return type annotation for private function `...` |  |
+| ANN204 | MissingReturnTypeMagicMethod | Missing return type annotation for magic method `...` |  |
+| ANN205 | MissingReturnTypeStaticMethod | Missing return type annotation for staticmethod `...` |  |
+| ANN206 | MissingReturnTypeClassMethod | Missing return type annotation for classmethod `...` |  |
+| ANN401 | DynamicallyTypedExpression | Dynamically typed expressions (typing.Any) are disallowed in `...` |  |
+
+### flake8-2020
+
+For more, see [flake8-2020](https://pypi.org/project/flake8-2020/1.7.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| YTT101 | SysVersionSlice3Referenced | `sys.version[:3]` referenced (python3.10), use `sys.version_info` |  |
+| YTT102 | SysVersion2Referenced | `sys.version[2]` referenced (python3.10), use `sys.version_info` |  |
+| YTT103 | SysVersionCmpStr3 | `sys.version` compared to string (python3.10), use `sys.version_info` |  |
+| YTT201 | SysVersionInfo0Eq3Referenced | `sys.version_info[0] == 3` referenced (python4), use `>=` |  |
+| YTT202 | SixPY3Referenced | `six.PY3` referenced (python4), use `not six.PY2` |  |
+| YTT203 | SysVersionInfo1CmpInt | `sys.version_info[1]` compared to integer (python4), compare `sys.version_info` to tuple |  |
+| YTT204 | SysVersionInfoMinorCmpInt | `sys.version_info.minor` compared to integer (python4), compare `sys.version_info` to tuple |  |
+| YTT301 | SysVersion0Referenced | `sys.version[0]` referenced (python10), use `sys.version_info` |  |
+| YTT302 | SysVersionCmpStr10 | `sys.version` compared to string (python10), use `sys.version_info` |  |
+| YTT303 | SysVersionSlice1Referenced | `sys.version[:1]` referenced (python10), use `sys.version_info` |  |
+
+### flake8-blind-except
+
+For more, see [flake8-blind-except](https://pypi.org/project/flake8-blind-except/0.2.1/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| BLE001 | BlindExcept | Blind except Exception: statement |  |
+
+### mccabe
+
+For more, see [mccabe](https://pypi.org/project/mccabe/0.7.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| C901 | FunctionIsTooComplex | `...` is too complex (10) |  |
+
+### Ruff-specific rules
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| RUF001 | AmbiguousUnicodeCharacterString | String contains ambiguous unicode character '𝐁' (did you mean 'B'?) | 🛠 |
+| RUF002 | AmbiguousUnicodeCharacterDocstring | Docstring contains ambiguous unicode character '𝐁' (did you mean 'B'?) | 🛠 |
+| RUF003 | AmbiguousUnicodeCharacterComment | Comment contains ambiguous unicode character '𝐁' (did you mean 'B'?) |  |
+| RUF101 | ConvertExitToSysExit | `exit()` is only available in the interpreter, use `sys.exit()` instead | 🛠 |
+
 ### Meta rules
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | M001 | UnusedNOQA | Unused `noqa` directive | 🛠 |
 
+<!-- End auto-generated sections. -->
+
 ## Editor Integrations
 
+### VS Code (Official)
+
+Download the [Ruff VS Code extension](https://marketplace.visualstudio.com/items?itemName=charliermarsh.ruff).
+
 ### PyCharm
 
 Ruff can be installed as an [External Tool](https://www.jetbrains.com/help/pycharm/configuring-third-party-tools.html)
@@ -468,6 +715,70 @@ Ruff should then appear as a runnable action:
 
 ![Ruff as a runnable action](https://user-images.githubusercontent.com/1309177/193156026-732b0aaf-3dd9-4549-9b4d-2de6d2168a33.png)
 
+### Vim & Neovim (Unofficial)
+
+Ruff is available as part of the [coc-pyright](https://github.com/fannheyward/coc-pyright) extension
+for coc.nvim.
+
+<details>
+<summary>Ruff can also be integrated via <a href="https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md#efm"><code>efm</code></a> in just a <a href="https://github.com/JafarAbdi/myconfigs/blob/6f0b6b2450e92ec8fc50422928cd22005b919110/efm-langserver/config.yaml#L14-L20">few lines</a>.</summary>
+<br>
+
+```yaml
+tools:
+  python-ruff: &python-ruff
+    lint-command: 'ruff --config ~/myconfigs/linters/ruff.toml --quiet ${INPUT}'
+    lint-stdin: true
+    lint-formats:
+      - '%f:%l:%c: %m'
+    format-command: 'ruff --stdin-filename ${INPUT} --config ~/myconfigs/linters/ruff.toml --fix --exit-zero --quiet -'
+    format-stdin: true
+```
+
+</details>
+
+<details>
+<summary>For neovim users using <a href="https://github.com/jose-elias-alvarez/null-ls.nvim"><code>null-ls</code></a>, Ruff is already <a href="https://github.com/jose-elias-alvarez/null-ls.nvim">integrated</a>.</summary>
+<br>
+
+```lua
+local null_ls = require("null-ls")
+local methods = require("null-ls.methods")
+local helpers = require("null-ls.helpers")
+
+local function ruff_fix()
+    return helpers.make_builtin({
+        name = "ruff",
+        meta = {
+            url = "https://github.com/charliermarsh/ruff/",
+            description = "An extremely fast Python linter, written in Rust.",
+        },
+        method = methods.internal.FORMATTING,
+        filetypes = { "python" },
+        generator_opts = {
+            command = "ruff",
+            args = { "--fix", "-e", "-n", "--stdin-filename", "$FILENAME", "-" },
+            to_stdin = true
+        },
+        factory = helpers.formatter_factory
+    })
+end
+
+null_ls.setup({
+    sources = {
+        ruff_fix(),
+        null_ls.builtins.diagnostics.ruff,
+    }
+})
+```
+
+</details>
+
+### Language Server Protocol (Unofficial)
+
+[`ruffd`](https://github.com/Seamooo/ruffd) is a Rust-based language server for Ruff that implements
+the Language Server Protocol (LSP).
+
 ### GitHub Actions
 
 GitHub Actions has everything you need to run Ruff out-of-the-box:
@@ -504,10 +815,13 @@ stylistic lint rules that are obviated by autoformatting.
 
 ### How does Ruff compare to Flake8?
 
+(Coming from Flake8? Try [`flake8-to-ruff`](https://pypi.org/project/flake8-to-ruff/) to
+automatically convert your existing configuration.)
+
 Ruff can be used as a (near) drop-in replacement for Flake8 when used (1) without or with a small
 number of plugins, (2) alongside Black, and (3) on Python 3 code.
 
-Under those conditions Ruff is missing 14 rules related to string `.format` calls, 1 rule related
+Under those conditions Ruff is missing 9 rules related to `%` string formatting, 1 rule related
 to docstring parsing, and 1 rule related to redefined variables.
 
 Ruff re-implements some of the most popular Flake8 plugins and related code quality tools natively,
@@ -516,14 +830,23 @@ including:
 - [`pydocstyle`](https://pypi.org/project/pydocstyle/)
 - [`pep8-naming`](https://pypi.org/project/pep8-naming/)
 - [`yesqa`](https://github.com/asottile/yesqa)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/)
+- [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-builtins`](https://pypi.org/project/flake8-builtins/)
+- [`flake8-debugger`](https://pypi.org/project/flake8-debugger/)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
+- [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
-- [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
-- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (10/32)
-- [`pyupgrade`](https://pypi.org/project/pyupgrade/) (8/34)
+- [`flake8-annotations`](https://pypi.org/project/flake8-annotations/)
+- [`flake8-bandit`](https://pypi.org/project/flake8-bandit/) (6/40)
+- [`flake8-2020`](https://pypi.org/project/flake8-2020/)
+- [`flake8-blind-except`](https://pypi.org/project/flake8-blind-except/)
+- [`flake8-boolean-trap`](https://pypi.org/project/flake8-boolean-trap/)
+- [`mccabe`](https://pypi.org/project/mccabe/)
+- [`isort`](https://pypi.org/project/isort/)
+- [`pyupgrade`](https://pypi.org/project/pyupgrade/) (16/33)
 - [`autoflake`](https://pypi.org/project/autoflake/) (1/7)
 
 Beyond rule-set parity, Ruff suffers from the following limitations vis-à-vis Flake8:
@@ -537,17 +860,26 @@ Beyond rule-set parity, Ruff suffers from the following limitations vis-à-vis F
 
 Today, Ruff can be used to replace Flake8 when used with any of the following plugins:
 
+- [`pydocstyle`](https://pypi.org/project/pydocstyle/)
 - [`pep8-naming`](https://pypi.org/project/pep8-naming/)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/)
+- [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-builtins`](https://pypi.org/project/flake8-builtins/)
+- [`flake8-debugger`](https://pypi.org/project/flake8-debugger/)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
+- [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
-- [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
-- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (9/32)
+- [`flake8-annotations`](https://pypi.org/project/flake8-annotations/)
+- [`flake8-bandit`](https://pypi.org/project/flake8-bandit/) (6/40)
+- [`flake8-2020`](https://pypi.org/project/flake8-2020/)
+- [`flake8-blind-except`](https://pypi.org/project/flake8-blind-except/)
+- [`flake8-boolean-trap`](https://pypi.org/project/flake8-boolean-trap/)
+- [`mccabe`](https://pypi.org/project/mccabe/)
 
-Ruff also implements the functionality that you get from [`yesqa`](https://github.com/asottile/yesqa),
-and a subset of the rules implemented in [`pyupgrade`](https://pypi.org/project/pyupgrade/) (8/34).
+Ruff can also replace [`isort`](https://pypi.org/project/isort/), [`yesqa`](https://github.com/asottile/yesqa),
+and a subset of the rules implemented in [`pyupgrade`](https://pypi.org/project/pyupgrade/) (16/33).
 
 If you're looking to use Ruff, but rely on an unsupported Flake8 plugin, free to file an Issue.
 
@@ -567,6 +899,33 @@ on Rust at all.
 Ruff does not yet support third-party plugins, though a plugin system is within-scope for the
 project. See [#283](https://github.com/charliermarsh/ruff/issues/283) for more.
 
+### How does Ruff's import sorting compare to [`isort`](https://pypi.org/project/isort/)?
+
+Ruff's import sorting is intended to be nearly equivalent to `isort` when used `profile = "black"`.
+(There are some minor differences in how Ruff and isort break ties between similar imports.)
+
+Like `isort`, Ruff's import sorting is compatible with Black.
+
+Ruff is less configurable than `isort`, but supports the `known-first-party`, `known-third-party`,
+`extra-standard-library`, and `src` settings, like so:
+
+```toml
+[tool.ruff]
+select = [
+    # Pyflakes
+    "F",
+    # Pycodestyle
+    "E",
+    "W",
+    # isort
+    "I001"
+]
+src = ["src", "tests"]
+
+[tool.ruff.isort]
+known-first-party = ["my_module1", "my_module2"]
+```
+
 ### Does Ruff support NumPy- or Google-style docstrings?
 
 Yes! To enable a specific docstring convention, start by enabling all `pydocstyle` error codes, and
@@ -639,16 +998,21 @@ extend-ignore = [
 
 ## Development
 
-Ruff is written in Rust (1.63.0). You'll need to install the [Rust toolchain](https://www.rust-lang.org/tools/install)
+Ruff is written in Rust (1.65.0). You'll need to install the [Rust toolchain](https://www.rust-lang.org/tools/install)
 for development.
 
 Assuming you have `cargo` installed, you can run:
 
 ```shell
 cargo run resources/test/fixtures
-cargo fmt
-cargo clippy
-cargo test
+```
+
+For development, we use [nightly Rust](https://rust-lang.github.io/rustup/concepts/channels.html#working-with-nightly-rust):
+
+```shell
+cargo +nightly fmt
+cargo +nightly clippy
+cargo +nightly test
 ```
 
 ## Releases

benches/source_code_locator.rs

@@ -0,0 +1,18 @@
+use std::fs;
+use std::path::Path;
+
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use ropey::Rope;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let contents = fs::read_to_string(Path::new("resources/test/fixtures/D.py")).unwrap();
+    c.bench_function("rope", |b| {
+        b.iter(|| {
+            let rope = Rope::from_str(black_box(&contents));
+            rope.line_to_char(black_box(4));
+        });
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

examples/generate_check_code_prefix.rs

@@ -1,105 +0,0 @@
-//! Generate the CheckCodePrefix enum.
-
-use std::collections::{BTreeMap, BTreeSet};
-
-use codegen::{Scope, Type, Variant};
-use itertools::Itertools;
-use strum::IntoEnumIterator;
-
-use ruff::checks::CheckCode;
-
-fn main() {
-    // Build up a map from prefix to matching CheckCodes.
-    let mut prefix_to_codes: BTreeMap<String, BTreeSet<CheckCode>> = Default::default();
-    for check_code in CheckCode::iter() {
-        let as_ref = check_code.as_ref().to_string();
-        for i in 1..=as_ref.len() {
-            let prefix = as_ref[..i].to_string();
-            let entry = prefix_to_codes
-                .entry(prefix)
-                .or_insert_with(|| Default::default());
-            entry.insert(check_code.clone());
-        }
-    }
-
-    let mut scope = Scope::new();
-
-    // Create the `CheckCodePrefix` definition.
-    let mut gen = scope
-        .new_enum("CheckCodePrefix")
-        .vis("pub")
-        .derive("EnumString")
-        .derive("Debug")
-        .derive("PartialEq")
-        .derive("Eq")
-        .derive("Clone")
-        .derive("Serialize")
-        .derive("Deserialize");
-    for (prefix, _) in &prefix_to_codes {
-        gen = gen.push_variant(Variant::new(prefix.to_string()));
-    }
-
-    // Create the `PrefixSpecificity` definition.
-    scope
-        .new_enum("PrefixSpecificity")
-        .vis("pub")
-        .derive("PartialEq")
-        .derive("Eq")
-        .derive("PartialOrd")
-        .derive("Ord")
-        .push_variant(Variant::new("Category"))
-        .push_variant(Variant::new("Hundreds"))
-        .push_variant(Variant::new("Tens"))
-        .push_variant(Variant::new("Explicit"));
-
-    // Create the `match` statement, to map from definition to relevant codes.
-    let mut gen = scope
-        .new_impl("CheckCodePrefix")
-        .new_fn("codes")
-        .arg_ref_self()
-        .ret(Type::new("Vec<CheckCode>"))
-        .vis("pub")
-        .line("match self {");
-    for (prefix, codes) in &prefix_to_codes {
-        gen = gen.line(format!(
-            "CheckCodePrefix::{prefix} => vec![{}],",
-            codes
-                .iter()
-                .map(|code| format!("CheckCode::{}", code.as_ref()))
-                .join(", ")
-        ));
-    }
-    gen.line("}");
-
-    // Create the `match` statement, to map from definition to specificity.
-    let mut gen = scope
-        .new_impl("CheckCodePrefix")
-        .new_fn("specificity")
-        .arg_ref_self()
-        .ret(Type::new("PrefixSpecificity"))
-        .vis("pub")
-        .line("match self {");
-    for (prefix, _) in &prefix_to_codes {
-        let specificity = match prefix.len() {
-            4 => "Explicit",
-            3 => "Tens",
-            2 => "Hundreds",
-            1 => "Category",
-            _ => panic!("Invalid prefix: {}", prefix),
-        };
-        gen = gen.line(format!(
-            "CheckCodePrefix::{prefix} => PrefixSpecificity::{},",
-            specificity
-        ));
-    }
-    gen.line("}");
-
-    println!("//! File automatically generated by examples/generate_check_code_prefix.rs.");
-    println!();
-    println!("use serde::{{Deserialize, Serialize}};");
-    println!("use strum_macros::EnumString;");
-    println!();
-    println!("use crate::checks::CheckCode;");
-    println!();
-    println!("{}", scope.to_string());
-}

examples/generate_rules_table.rs

@@ -1,29 +0,0 @@
-//! Generate a Markdown-compatible table of supported lint rules.
-
-use strum::IntoEnumIterator;
-
-use ruff::checks::{CheckCategory, CheckCode};
-
-fn main() {
-    for check_category in CheckCategory::iter() {
-        println!("### {}", check_category.title());
-        println!();
-
-        println!("| Code | Name | Message | Fix |");
-        println!("| ---- | ---- | ------- | --- |");
-        for check_code in CheckCode::iter() {
-            if check_code.category() == check_category {
-                let check_kind = check_code.kind();
-                let fix_token = if check_kind.fixable() { "🛠" } else { "" };
-                println!(
-                    "| {} | {} | {} | {} |",
-                    check_kind.code().as_ref(),
-                    check_kind.as_ref(),
-                    check_kind.summary().replace("|", r"\|"),
-                    fix_token
-                );
-            }
-        }
-        println!();
-    }
-}

flake8_to_ruff/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "flake8-to-ruff"
+version = "0.0.141-dev.0"
+edition = "2021"
+
+[lib]
+name = "flake8_to_ruff"
+
+[dependencies]
+anyhow = { version = "1.0.66" }
+clap = { version = "4.0.1", features = ["derive"] }
+configparser = { version = "3.0.2" }
+once_cell = { version = "1.16.0" }
+regex = { version = "1.6.0" }
+ruff = { path = "..", default-features = false }
+rustc-hash = { version = "1.1.0" }
+serde = { version = "1.0.147", features = ["derive"] }
+serde_json = { version = "1.0.87" }
+toml = { version = "0.5.9" }
+
+[dev-dependencies]
+
+[features]

flake8_to_ruff/README.md

@@ -0,0 +1,98 @@
+# flake8-to-ruff
+
+Convert existing Flake8 configuration files (`setup.cfg`, `tox.ini`, or `.flake8`) for use with
+[Ruff](https://github.com/charliermarsh/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.)
+2. Ruff will omit any error codes that are unimplemented or unsupported by Ruff, including error
+   codes from unsupported plugins. (See the [Ruff README](https://github.com/charliermarsh/ruff#user-content-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/charliermarsh/ruff/blob/main/CONTRIBUTING.md).

flake8_to_ruff/examples/poetry.ini

@@ -0,0 +1,36 @@
+[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/*,

flake8_to_ruff/examples/python-discord.ini

@@ -0,0 +1,19 @@
+[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

flake8_to_ruff/examples/requests.ini

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

flake8_to_ruff/pyproject.toml

@@ -0,0 +1,33 @@
+[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 :: 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/charliermarsh/ruff#subdirectory=crates/flake8_to_ruff"
+
+[build-system]
+requires = ["maturin>=0.14,<0.15"]
+build-backend = "maturin"
+
+[tool.maturin]
+bindings = "bin"
+strip = true

flake8_to_ruff/src/converter.rs

@@ -0,0 +1,560 @@
+use std::collections::{BTreeSet, HashMap};
+
+use anyhow::Result;
+use ruff::checks_gen::CheckCodePrefix;
+use ruff::flake8_quotes::settings::Quote;
+use ruff::flake8_tidy_imports::settings::Strictness;
+use ruff::settings::options::Options;
+use ruff::settings::pyproject::Pyproject;
+use ruff::{
+    flake8_annotations, flake8_bugbear, flake8_quotes, flake8_tidy_imports, mccabe, pep8_naming,
+};
+
+use crate::plugin::Plugin;
+use crate::{parser, plugin};
+
+pub fn convert(
+    flake8: &HashMap<String, Option<String>>,
+    plugins: Option<Vec<Plugin>>,
+) -> Result<Pyproject> {
+    // Extract all referenced check code prefixes, to power plugin inference.
+    let mut referenced_codes: BTreeSet<CheckCodePrefix> = BTreeSet::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);
+                        }
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+
+    // 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| BTreeSet::from_iter(parser::parse_prefix_codes(value)))
+        })
+        .unwrap_or_else(|| {
+            plugin::resolve_select(
+                flake8,
+                &plugins.unwrap_or_else(|| {
+                    plugin::infer_plugins_from_options(flake8)
+                        .into_iter()
+                        .chain(plugin::infer_plugins_from_codes(&referenced_codes))
+                        .collect()
+                }),
+            )
+        });
+    let mut ignore = flake8
+        .get("ignore")
+        .and_then(|value| {
+            value
+                .as_ref()
+                .map(|value| BTreeSet::from_iter(parser::parse_prefix_codes(value)))
+        })
+        .unwrap_or_default();
+
+    // Parse each supported option.
+    let mut options = Options::default();
+    let mut flake8_annotations = flake8_annotations::settings::Options::default();
+    let mut flake8_bugbear = flake8_bugbear::settings::Options::default();
+    let mut flake8_quotes = flake8_quotes::settings::Options::default();
+    let mut flake8_tidy_imports = flake8_tidy_imports::settings::Options::default();
+    let mut mccabe = mccabe::settings::Options::default();
+    let mut pep8_naming = pep8_naming::settings::Options::default();
+    for (key, value) in flake8 {
+        if let Some(value) = value {
+            match key.as_str() {
+                // flake8
+                "max-line-length" | "max_line_length" => match value.clone().parse::<usize>() {
+                    Ok(line_length) => options.line_length = Some(line_length),
+                    Err(e) => eprintln!("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) => {
+                            options.per_file_ignores =
+                                Some(parser::collect_per_file_ignores(per_file_ignores));
+                        }
+                        Err(e) => eprintln!("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-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) => eprintln!("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) => eprintln!("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) => eprintln!("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) => eprintln!("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::Single),
+                    _ => eprintln!("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::Single),
+                    _ => eprintln!("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::Single),
+                    _ => eprintln!("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) => eprintln!("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);
+                    }
+                    _ => eprintln!("Unexpected '{key}' value: {value}"),
+                },
+                // flake8-docstrings
+                "docstring-convention" => {
+                    // No-op (handled above).
+                }
+                // mccabe
+                "max-complexity" | "max_complexity" => match value.clone().parse::<usize>() {
+                    Ok(max_complexity) => mccabe.max_complexity = Some(max_complexity),
+                    Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
+                },
+                // Unknown
+                _ => eprintln!("Skipping unsupported property: {key}"),
+            }
+        }
+    }
+
+    // Deduplicate and sort.
+    options.select = Some(Vec::from_iter(select));
+    options.ignore = Some(Vec::from_iter(ignore));
+    if flake8_annotations != flake8_annotations::settings::Options::default() {
+        options.flake8_annotations = Some(flake8_annotations);
+    }
+    if flake8_bugbear != flake8_bugbear::settings::Options::default() {
+        options.flake8_bugbear = Some(flake8_bugbear);
+    }
+    if flake8_quotes != flake8_quotes::settings::Options::default() {
+        options.flake8_quotes = Some(flake8_quotes);
+    }
+    if flake8_tidy_imports != flake8_tidy_imports::settings::Options::default() {
+        options.flake8_tidy_imports = Some(flake8_tidy_imports);
+    }
+    if mccabe != mccabe::settings::Options::default() {
+        options.mccabe = Some(mccabe);
+    }
+    if pep8_naming != pep8_naming::settings::Options::default() {
+        options.pep8_naming = Some(pep8_naming);
+    }
+
+    // Create the pyproject.toml.
+    Ok(Pyproject::new(options))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashMap;
+
+    use anyhow::Result;
+    use ruff::checks_gen::CheckCodePrefix;
+    use ruff::flake8_quotes;
+    use ruff::settings::options::Options;
+    use ruff::settings::pyproject::Pyproject;
+
+    use crate::converter::convert;
+    use crate::plugin::Plugin;
+
+    #[test]
+    fn it_converts_empty() -> Result<()> {
+        let actual = convert(&HashMap::from([]), None)?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: None,
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: None,
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn it_converts_dashes() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
+            Some(vec![]),
+        )?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: Some(100),
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: None,
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn it_converts_underscores() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
+            Some(vec![]),
+        )?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: Some(100),
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: None,
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn it_ignores_parse_errors() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
+            Some(vec![]),
+        )?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: None,
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: None,
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn it_converts_plugin_options() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            Some(vec![]),
+        )?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: None,
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: Some(flake8_quotes::settings::Options {
+                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
+                multiline_quotes: None,
+                docstring_quotes: None,
+                avoid_escape: None,
+            }),
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn it_converts_docstring_conventions() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([(
+                "docstring-convention".to_string(),
+                Some("numpy".to_string()),
+            )]),
+            Some(vec![Plugin::Flake8Docstrings]),
+        )?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: None,
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::D100,
+                CheckCodePrefix::D101,
+                CheckCodePrefix::D102,
+                CheckCodePrefix::D103,
+                CheckCodePrefix::D104,
+                CheckCodePrefix::D105,
+                CheckCodePrefix::D106,
+                CheckCodePrefix::D200,
+                CheckCodePrefix::D201,
+                CheckCodePrefix::D202,
+                CheckCodePrefix::D204,
+                CheckCodePrefix::D205,
+                CheckCodePrefix::D206,
+                CheckCodePrefix::D207,
+                CheckCodePrefix::D208,
+                CheckCodePrefix::D209,
+                CheckCodePrefix::D210,
+                CheckCodePrefix::D211,
+                CheckCodePrefix::D214,
+                CheckCodePrefix::D215,
+                CheckCodePrefix::D300,
+                CheckCodePrefix::D400,
+                CheckCodePrefix::D403,
+                CheckCodePrefix::D404,
+                CheckCodePrefix::D405,
+                CheckCodePrefix::D406,
+                CheckCodePrefix::D407,
+                CheckCodePrefix::D408,
+                CheckCodePrefix::D409,
+                CheckCodePrefix::D410,
+                CheckCodePrefix::D411,
+                CheckCodePrefix::D412,
+                CheckCodePrefix::D414,
+                CheckCodePrefix::D418,
+                CheckCodePrefix::D419,
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: None,
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn it_infers_plugins_if_omitted() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            None,
+        )?;
+        let expected = Pyproject::new(Options {
+            dummy_variable_rgx: None,
+            exclude: None,
+            extend_exclude: None,
+            extend_ignore: None,
+            extend_select: None,
+            fix: None,
+            fixable: None,
+            ignore: Some(vec![]),
+            line_length: None,
+            per_file_ignores: None,
+            select: Some(vec![
+                CheckCodePrefix::E,
+                CheckCodePrefix::F,
+                CheckCodePrefix::Q,
+                CheckCodePrefix::W,
+            ]),
+            show_source: None,
+            src: None,
+            target_version: None,
+            unfixable: None,
+            flake8_annotations: None,
+            flake8_bugbear: None,
+            flake8_quotes: Some(flake8_quotes::settings::Options {
+                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
+                multiline_quotes: None,
+                docstring_quotes: None,
+                avoid_escape: None,
+            }),
+            flake8_tidy_imports: None,
+            isort: None,
+            mccabe: None,
+            pep8_naming: None,
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+}

flake8_to_ruff/src/lib.rs

@@ -0,0 +1,16 @@
+#![allow(
+    clippy::collapsible_else_if,
+    clippy::collapsible_if,
+    clippy::implicit_hasher,
+    clippy::match_same_arms,
+    clippy::missing_errors_doc,
+    clippy::missing_panics_doc,
+    clippy::module_name_repetitions,
+    clippy::must_use_candidate,
+    clippy::similar_names,
+    clippy::too_many_lines
+)]
+
+pub mod converter;
+mod parser;
+pub mod plugin;

flake8_to_ruff/src/main.rs

@@ -0,0 +1,56 @@
+//! Utility to generate Ruff's pyproject.toml section from a Flake8 INI file.
+#![allow(
+    clippy::collapsible_else_if,
+    clippy::collapsible_if,
+    clippy::implicit_hasher,
+    clippy::match_same_arms,
+    clippy::missing_errors_doc,
+    clippy::missing_panics_doc,
+    clippy::module_name_repetitions,
+    clippy::must_use_candidate,
+    clippy::similar_names,
+    clippy::too_many_lines
+)]
+
+use std::path::PathBuf;
+
+use anyhow::Result;
+use clap::Parser;
+use configparser::ini::Ini;
+use flake8_to_ruff::converter;
+use flake8_to_ruff::plugin::Plugin;
+
+#[derive(Parser)]
+#[command(
+    about = "Convert existing Flake8 configuration to Ruff.",
+    long_about = None
+)]
+struct Cli {
+    /// Path to the Flake8 configuration file (e.g., 'setup.cfg', 'tox.ini', or
+    /// '.flake8').
+    #[arg(required = true)]
+    file: PathBuf,
+    /// List of plugins to enable.
+    #[arg(long, value_delimiter = ',')]
+    plugin: Option<Vec<Plugin>>,
+}
+
+fn main() -> Result<()> {
+    let cli = Cli::parse();
+
+    // Read the INI file.
+    let mut ini = Ini::new_cs();
+    ini.set_multiline(true);
+    let config = ini.load(cli.file).map_err(|msg| anyhow::anyhow!(msg))?;
+
+    // Extract the Flake8 section.
+    let flake8 = config
+        .get("flake8")
+        .expect("Unable to find flake8 section in INI file.");
+
+    // Create the pyproject.toml.
+    let pyproject = converter::convert(flake8, cli.plugin)?;
+    println!("{}", toml::to_string_pretty(&pyproject)?);
+
+    Ok(())
+}

flake8_to_ruff/src/parser.rs

@@ -0,0 +1,382 @@
+use std::str::FromStr;
+
+use anyhow::Result;
+use once_cell::sync::Lazy;
+use regex::Regex;
+use ruff::checks_gen::CheckCodePrefix;
+use ruff::settings::types::PatternPrefixPair;
+use rustc_hash::FxHashMap;
+
+static COMMA_SEPARATED_LIST_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"[,\s]").unwrap());
+
+/// Parse a comma-separated list of `CheckCodePrefix` values (e.g.,
+/// "F401,E501").
+pub fn parse_prefix_codes(value: &str) -> Vec<CheckCodePrefix> {
+    let mut codes: Vec<CheckCodePrefix> = vec![];
+    for code in COMMA_SEPARATED_LIST_RE.split(value) {
+        let code = code.trim();
+        if code.is_empty() {
+            continue;
+        }
+        if let Ok(code) = CheckCodePrefix::from_str(code) {
+            codes.push(code);
+        } else {
+            eprintln!("Unsupported prefix code: {code}");
+        }
+    }
+    codes
+}
+
+/// Parse a comma-separated list of strings (e.g., "__init__.py,__main__.py").
+pub 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 fn parse_bool(value: &str) -> Result<bool> {
+    match value.trim() {
+        "true" => Ok(true),
+        "false" => Ok(false),
+        _ => Err(anyhow::anyhow!("Unexpected boolean value: {value}")),
+    }
+}
+
+#[derive(Debug)]
+struct Token {
+    token_name: TokenType,
+    src: String,
+}
+
+#[derive(Debug)]
+enum TokenType {
+    Code,
+    File,
+    Colon,
+    Comma,
+    Ws,
+    Eof,
+}
+
+struct State {
+    seen_sep: bool,
+    seen_colon: bool,
+    filenames: Vec<String>,
+    codes: Vec<String>,
+}
+
+impl State {
+    fn new() -> Self {
+        Self {
+            seen_sep: true,
+            seen_colon: false,
+            filenames: vec![],
+            codes: vec![],
+        }
+    }
+
+    /// Generate the list of `StrCheckCodePair` pairs for the current state.
+    fn parse(&self) -> Vec<PatternPrefixPair> {
+        let mut codes: Vec<PatternPrefixPair> = vec![];
+        for code in &self.codes {
+            match CheckCodePrefix::from_str(code) {
+                Ok(code) => {
+                    for filename in &self.filenames {
+                        codes.push(PatternPrefixPair {
+                            pattern: filename.clone(),
+                            prefix: code.clone(),
+                        });
+                    }
+                }
+                Err(_) => eprintln!("Skipping unrecognized prefix: {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().to_string().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 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 {
+                return Err(anyhow::anyhow!("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 {
+                return Err(anyhow::anyhow!("Unexpected token: {:?}", token.token_name));
+            }
+        }
+    }
+    Ok(codes)
+}
+
+/// Collect a list of `PatternPrefixPair` structs as a `BTreeMap`.
+pub fn collect_per_file_ignores(
+    pairs: Vec<PatternPrefixPair>,
+) -> FxHashMap<String, Vec<CheckCodePrefix>> {
+    let mut per_file_ignores: FxHashMap<String, Vec<CheckCodePrefix>> = FxHashMap::default();
+    for pair in pairs {
+        per_file_ignores
+            .entry(pair.pattern)
+            .or_insert_with(Vec::new)
+            .push(pair.prefix);
+    }
+    per_file_ignores
+}
+
+#[cfg(test)]
+mod tests {
+    use anyhow::Result;
+    use ruff::checks_gen::CheckCodePrefix;
+    use ruff::settings::types::PatternPrefixPair;
+
+    use crate::parser::{parse_files_to_codes_mapping, parse_prefix_codes, parse_strings};
+
+    #[test]
+    fn it_parses_prefix_codes() {
+        let actual = parse_prefix_codes("");
+        let expected: Vec<CheckCodePrefix> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes(" ");
+        let expected: Vec<CheckCodePrefix> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401");
+        let expected = vec![CheckCodePrefix::F401];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401,");
+        let expected = vec![CheckCodePrefix::F401];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401,E501");
+        let expected = vec![CheckCodePrefix::F401, CheckCodePrefix::E501];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401, E501");
+        let expected = vec![CheckCodePrefix::F401, CheckCodePrefix::E501];
+        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: CheckCodePrefix::F841,
+            },
+            PatternPrefixPair {
+                pattern: "examples/*".to_string(),
+                prefix: CheckCodePrefix::F841,
+            },
+        ];
+        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: CheckCodePrefix::D,
+            },
+            PatternPrefixPair {
+                pattern: "setup.py".to_string(),
+                prefix: CheckCodePrefix::D,
+            },
+            PatternPrefixPair {
+                pattern: "examples/*".to_string(),
+                prefix: CheckCodePrefix::D,
+            },
+            PatternPrefixPair {
+                pattern: "docs/*".to_string(),
+                prefix: CheckCodePrefix::D,
+            },
+            PatternPrefixPair {
+                pattern: "extra/*".to_string(),
+                prefix: CheckCodePrefix::D,
+            },
+        ];
+        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: CheckCodePrefix::E402,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/core/downloader/handlers/http.py".to_string(),
+                prefix: CheckCodePrefix::F401,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/http/__init__.py".to_string(),
+                prefix: CheckCodePrefix::F401,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/linkextractors/__init__.py".to_string(),
+                prefix: CheckCodePrefix::E402,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/linkextractors/__init__.py".to_string(),
+                prefix: CheckCodePrefix::F401,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/selector/__init__.py".to_string(),
+                prefix: CheckCodePrefix::F401,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/spiders/__init__.py".to_string(),
+                prefix: CheckCodePrefix::E402,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/spiders/__init__.py".to_string(),
+                prefix: CheckCodePrefix::F401,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/utils/url.py".to_string(),
+                prefix: CheckCodePrefix::F403,
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/utils/url.py".to_string(),
+                prefix: CheckCodePrefix::F405,
+            },
+            PatternPrefixPair {
+                pattern: "tests/test_loader.py".to_string(),
+                prefix: CheckCodePrefix::E741,
+            },
+        ];
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+}

flake8_to_ruff/src/plugin.rs

@@ -0,0 +1,435 @@
+use std::collections::{BTreeSet, HashMap};
+use std::str::FromStr;
+
+use anyhow::anyhow;
+use ruff::checks_gen::CheckCodePrefix;
+
+#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
+pub enum Plugin {
+    Flake8Bandit,
+    Flake8Bugbear,
+    Flake8Builtins,
+    Flake8Comprehensions,
+    Flake8Debugger,
+    Flake8Docstrings,
+    Flake8TidyImports,
+    Flake8Print,
+    Flake8Quotes,
+    Flake8Annotations,
+    McCabe,
+    Flake8BlindExcept,
+    PEP8Naming,
+    Pyupgrade,
+}
+
+impl FromStr for Plugin {
+    type Err = anyhow::Error;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        match string {
+            "flake8-bandit" => Ok(Plugin::Flake8Bandit),
+            "flake8-bugbear" => Ok(Plugin::Flake8Bugbear),
+            "flake8-builtins" => Ok(Plugin::Flake8Builtins),
+            "flake8-comprehensions" => Ok(Plugin::Flake8Comprehensions),
+            "flake8-debugger" => Ok(Plugin::Flake8Debugger),
+            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
+            "flake8-tidy-imports" => Ok(Plugin::Flake8TidyImports),
+            "flake8-print" => Ok(Plugin::Flake8Print),
+            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
+            "flake8-annotations" => Ok(Plugin::Flake8Annotations),
+            "flake8-blind-except" => Ok(Plugin::Flake8BlindExcept),
+            "mccabe" => Ok(Plugin::McCabe),
+            "pep8-naming" => Ok(Plugin::PEP8Naming),
+            "pyupgrade" => Ok(Plugin::Pyupgrade),
+            _ => Err(anyhow!("Unknown plugin: {}", string)),
+        }
+    }
+}
+
+impl Plugin {
+    pub fn default(&self) -> CheckCodePrefix {
+        match self {
+            Plugin::Flake8Bandit => CheckCodePrefix::S,
+            Plugin::Flake8Bugbear => CheckCodePrefix::B,
+            Plugin::Flake8Builtins => CheckCodePrefix::A,
+            Plugin::Flake8Comprehensions => CheckCodePrefix::C4,
+            Plugin::Flake8Debugger => CheckCodePrefix::T1,
+            Plugin::Flake8Docstrings => CheckCodePrefix::D,
+            Plugin::Flake8TidyImports => CheckCodePrefix::I25,
+            Plugin::Flake8Print => CheckCodePrefix::T2,
+            Plugin::Flake8Quotes => CheckCodePrefix::Q,
+            Plugin::Flake8Annotations => CheckCodePrefix::ANN,
+            Plugin::Flake8BlindExcept => CheckCodePrefix::BLE,
+            Plugin::McCabe => CheckCodePrefix::C9,
+            Plugin::PEP8Naming => CheckCodePrefix::N,
+            Plugin::Pyupgrade => CheckCodePrefix::U,
+        }
+    }
+
+    pub fn select(&self, flake8: &HashMap<String, Option<String>>) -> Vec<CheckCodePrefix> {
+        match self {
+            Plugin::Flake8Bandit => vec![CheckCodePrefix::S],
+            Plugin::Flake8Bugbear => vec![CheckCodePrefix::B],
+            Plugin::Flake8Builtins => vec![CheckCodePrefix::A],
+            Plugin::Flake8Comprehensions => vec![CheckCodePrefix::C4],
+            Plugin::Flake8Debugger => vec![CheckCodePrefix::T1],
+            Plugin::Flake8Docstrings => {
+                // Use the user-provided docstring.
+                for key in ["docstring-convention", "docstring_convention"] {
+                    if let Some(Some(value)) = flake8.get(key) {
+                        match DocstringConvention::from_str(value) {
+                            Ok(convention) => return convention.select(),
+                            Err(e) => {
+                                eprintln!("Unexpected '{key}' value: {value} ({e}");
+                                return vec![];
+                            }
+                        }
+                    }
+                }
+                // Default to PEP8.
+                DocstringConvention::PEP8.select()
+            }
+            Plugin::Flake8TidyImports => vec![CheckCodePrefix::I25],
+            Plugin::Flake8Print => vec![CheckCodePrefix::T2],
+            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
+            Plugin::Flake8Annotations => vec![CheckCodePrefix::ANN],
+            Plugin::Flake8BlindExcept => vec![CheckCodePrefix::BLE],
+            Plugin::McCabe => vec![CheckCodePrefix::C9],
+            Plugin::PEP8Naming => vec![CheckCodePrefix::N],
+            Plugin::Pyupgrade => vec![CheckCodePrefix::U],
+        }
+    }
+}
+
+pub enum DocstringConvention {
+    All,
+    PEP8,
+    NumPy,
+    Google,
+}
+
+impl FromStr for DocstringConvention {
+    type Err = anyhow::Error;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        match string {
+            "all" => Ok(DocstringConvention::All),
+            "pep8" => Ok(DocstringConvention::PEP8),
+            "numpy" => Ok(DocstringConvention::NumPy),
+            "google" => Ok(DocstringConvention::Google),
+            _ => Err(anyhow!("Unknown docstring convention: {}", string)),
+        }
+    }
+}
+
+impl DocstringConvention {
+    fn select(&self) -> Vec<CheckCodePrefix> {
+        match self {
+            DocstringConvention::All => vec![CheckCodePrefix::D],
+            DocstringConvention::PEP8 => vec![
+                // All errors except D203, D212, D213, D214, D215, D404, D405, D406, D407, D408,
+                // D409, D410, D411, D413, D415, D416 and D417.
+                CheckCodePrefix::D100,
+                CheckCodePrefix::D101,
+                CheckCodePrefix::D102,
+                CheckCodePrefix::D103,
+                CheckCodePrefix::D104,
+                CheckCodePrefix::D105,
+                CheckCodePrefix::D106,
+                CheckCodePrefix::D107,
+                CheckCodePrefix::D200,
+                CheckCodePrefix::D201,
+                CheckCodePrefix::D202,
+                // CheckCodePrefix::D203,
+                CheckCodePrefix::D204,
+                CheckCodePrefix::D205,
+                CheckCodePrefix::D206,
+                CheckCodePrefix::D207,
+                CheckCodePrefix::D208,
+                CheckCodePrefix::D209,
+                CheckCodePrefix::D210,
+                CheckCodePrefix::D211,
+                // CheckCodePrefix::D212,
+                // CheckCodePrefix::D213,
+                // CheckCodePrefix::D214,
+                // CheckCodePrefix::D215,
+                CheckCodePrefix::D300,
+                CheckCodePrefix::D400,
+                CheckCodePrefix::D402,
+                CheckCodePrefix::D403,
+                // CheckCodePrefix::D404,
+                // CheckCodePrefix::D405,
+                // CheckCodePrefix::D406,
+                // CheckCodePrefix::D407,
+                // CheckCodePrefix::D408,
+                // CheckCodePrefix::D409,
+                // CheckCodePrefix::D410,
+                // CheckCodePrefix::D411,
+                CheckCodePrefix::D412,
+                // CheckCodePrefix::D413,
+                CheckCodePrefix::D414,
+                // CheckCodePrefix::D415,
+                // CheckCodePrefix::D416,
+                // CheckCodePrefix::D417,
+                CheckCodePrefix::D418,
+                CheckCodePrefix::D419,
+            ],
+            DocstringConvention::NumPy => vec![
+                // All errors except D107, D203, D212, D213, D402, D413, D415, D416, and D417.
+                CheckCodePrefix::D100,
+                CheckCodePrefix::D101,
+                CheckCodePrefix::D102,
+                CheckCodePrefix::D103,
+                CheckCodePrefix::D104,
+                CheckCodePrefix::D105,
+                CheckCodePrefix::D106,
+                // CheckCodePrefix::D107,
+                CheckCodePrefix::D200,
+                CheckCodePrefix::D201,
+                CheckCodePrefix::D202,
+                // CheckCodePrefix::D203,
+                CheckCodePrefix::D204,
+                CheckCodePrefix::D205,
+                CheckCodePrefix::D206,
+                CheckCodePrefix::D207,
+                CheckCodePrefix::D208,
+                CheckCodePrefix::D209,
+                CheckCodePrefix::D210,
+                CheckCodePrefix::D211,
+                // CheckCodePrefix::D212,
+                // CheckCodePrefix::D213,
+                CheckCodePrefix::D214,
+                CheckCodePrefix::D215,
+                CheckCodePrefix::D300,
+                CheckCodePrefix::D400,
+                // CheckCodePrefix::D402,
+                CheckCodePrefix::D403,
+                CheckCodePrefix::D404,
+                CheckCodePrefix::D405,
+                CheckCodePrefix::D406,
+                CheckCodePrefix::D407,
+                CheckCodePrefix::D408,
+                CheckCodePrefix::D409,
+                CheckCodePrefix::D410,
+                CheckCodePrefix::D411,
+                CheckCodePrefix::D412,
+                // CheckCodePrefix::D413,
+                CheckCodePrefix::D414,
+                // CheckCodePrefix::D415,
+                // CheckCodePrefix::D416,
+                // CheckCodePrefix::D417,
+                CheckCodePrefix::D418,
+                CheckCodePrefix::D419,
+            ],
+            DocstringConvention::Google => vec![
+                // All errors except D203, D204, D213, D215, D400, D401, D404, D406, D407, D408,
+                // D409 and D413.
+                CheckCodePrefix::D100,
+                CheckCodePrefix::D101,
+                CheckCodePrefix::D102,
+                CheckCodePrefix::D103,
+                CheckCodePrefix::D104,
+                CheckCodePrefix::D105,
+                CheckCodePrefix::D106,
+                CheckCodePrefix::D107,
+                CheckCodePrefix::D200,
+                CheckCodePrefix::D201,
+                CheckCodePrefix::D202,
+                // CheckCodePrefix::D203,
+                // CheckCodePrefix::D204,
+                CheckCodePrefix::D205,
+                CheckCodePrefix::D206,
+                CheckCodePrefix::D207,
+                CheckCodePrefix::D208,
+                CheckCodePrefix::D209,
+                CheckCodePrefix::D210,
+                CheckCodePrefix::D211,
+                CheckCodePrefix::D212,
+                // CheckCodePrefix::D213,
+                CheckCodePrefix::D214,
+                // CheckCodePrefix::D215,
+                CheckCodePrefix::D300,
+                // CheckCodePrefix::D400,
+                CheckCodePrefix::D402,
+                CheckCodePrefix::D403,
+                // CheckCodePrefix::D404,
+                CheckCodePrefix::D405,
+                // CheckCodePrefix::D406,
+                // CheckCodePrefix::D407,
+                // CheckCodePrefix::D408,
+                // CheckCodePrefix::D409,
+                CheckCodePrefix::D410,
+                CheckCodePrefix::D411,
+                CheckCodePrefix::D412,
+                // CheckCodePrefix::D413,
+                CheckCodePrefix::D414,
+                CheckCodePrefix::D415,
+                CheckCodePrefix::D416,
+                CheckCodePrefix::D417,
+                CheckCodePrefix::D418,
+                CheckCodePrefix::D419,
+            ],
+        }
+    }
+}
+
+/// 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 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-docstrings
+            "docstring-convention" | "docstring_convention" => {
+                plugins.insert(Plugin::Flake8Docstrings);
+            }
+            // flake8-bugbear
+            "extend-immutable-calls" | "extend_immutable_calls" => {
+                plugins.insert(Plugin::Flake8Bugbear);
+            }
+            // flake8-builtins
+            "builtins-ignorelist" | "builtins_ignorelist" => {
+                plugins.insert(Plugin::Flake8Builtins);
+            }
+            // 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-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-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);
+            }
+            _ => {}
+        }
+    }
+    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 fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin> {
+    [
+        Plugin::Flake8Bandit,
+        Plugin::Flake8Bugbear,
+        Plugin::Flake8Builtins,
+        Plugin::Flake8Comprehensions,
+        Plugin::Flake8Debugger,
+        Plugin::Flake8Docstrings,
+        Plugin::Flake8TidyImports,
+        Plugin::Flake8Print,
+        Plugin::Flake8Quotes,
+        Plugin::Flake8Annotations,
+        Plugin::Flake8BlindExcept,
+        Plugin::PEP8Naming,
+        Plugin::Pyupgrade,
+    ]
+    .into_iter()
+    .filter(|plugin| {
+        for prefix in codes {
+            if prefix
+                .codes()
+                .iter()
+                .any(|code| plugin.default().codes().contains(code))
+            {
+                return true;
+            }
+        }
+        false
+    })
+    .collect()
+}
+
+/// Resolve the set of enabled `CheckCodePrefix` values for the given plugins.
+pub fn resolve_select(
+    flake8: &HashMap<String, Option<String>>,
+    plugins: &[Plugin],
+) -> BTreeSet<CheckCodePrefix> {
+    // Include default Pyflakes and pycodestyle checks.
+    let mut select = BTreeSet::from([CheckCodePrefix::E, CheckCodePrefix::F, CheckCodePrefix::W]);
+
+    // Add prefix codes for every plugin.
+    for plugin in plugins {
+        select.extend(plugin.select(flake8));
+    }
+
+    select
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashMap;
+
+    use crate::plugin::{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);
+    }
+}

pyproject.toml

@@ -25,10 +25,13 @@ requires-python = ">=3.7"
 repository = "https://github.com/charliermarsh/ruff"
 
 [build-system]
-requires = ["maturin>=0.13,<0.14"]
+requires = ["maturin>=0.14,<0.15"]
 build-backend = "maturin"
 
 [tool.maturin]
 bindings = "bin"
-sdist-include = ["Cargo.lock"]
 strip = true
+
+[tool.isort]
+profile = "black"
+known_third_party = ["fastapi", "pydantic", "starlette"]

resources/test/fixtures/B003.py

@@ -0,0 +1,18 @@
+"""
+Should emit:
+B003 - on line 9
+"""
+
+import os
+from os import environ
+
+os.environ = {}
+environ = {}  # that's fine, assigning a new meaning to the module-level name
+
+
+class Object:
+    os = None
+
+
+o = Object()
+o.os.environ = {}

resources/test/fixtures/B004.py

@@ -0,0 +1,12 @@
+def this_is_a_bug():
+    o = object()
+    if hasattr(o, "__call__"):
+        print("Ooh, callable! Or is it?")
+    if getattr(o, "__call__", False):
+        print("Ooh, callable! Or is it?")
+
+
+def this_is_fine():
+    o = object()
+    if callable(o):
+        print("Ooh, this is actually callable.")

resources/test/fixtures/B005.py

@@ -0,0 +1,26 @@
+s = "qwe"
+s.strip(s)  # no warning
+s.strip("we")  # no warning
+s.strip(".facebook.com")  # warning
+s.strip("e")  # no warning
+s.strip("\n\t ")  # no warning
+s.strip(r"\n\t ")  # warning
+s.lstrip(s)  # no warning
+s.lstrip("we")  # no warning
+s.lstrip(".facebook.com")  # warning
+s.lstrip("e")  # no warning
+s.lstrip("\n\t ")  # no warning
+s.lstrip(r"\n\t ")  # warning
+s.rstrip(s)  # no warning
+s.rstrip("we")  # warning
+s.rstrip(".facebook.com")  # warning
+s.rstrip("e")  # no warning
+s.rstrip("\n\t ")  # no warning
+s.rstrip(r"\n\t ")  # warning
+
+from somewhere import other_type, strip
+
+strip("we")  # no warning
+other_type().lstrip()  # no warning
+other_type().rstrip(["a", "b", "c"])  # no warning
+other_type().strip("a", "b")  # no warning

resources/test/fixtures/B006_B008.py

@@ -0,0 +1,207 @@
+import collections
+import datetime as dt
+import logging
+import operator
+import random
+import re
+import time
+import types
+from operator import attrgetter, itemgetter, methodcaller
+from types import MappingProxyType
+
+
+# B006
+# Allow immutable literals/calls/comprehensions
+def this_is_okay(value=(1, 2, 3)):
+    ...
+
+
+async def and_this_also(value=tuple()):
+    pass
+
+
+def frozenset_also_okay(value=frozenset()):
+    pass
+
+
+def mappingproxytype_okay(
+    value=MappingProxyType({}), value2=types.MappingProxyType({})
+):
+    pass
+
+
+def re_compile_ok(value=re.compile("foo")):
+    pass
+
+
+def operators_ok(
+    v=operator.attrgetter("foo"),
+    v2=operator.itemgetter("foo"),
+    v3=operator.methodcaller("foo"),
+):
+    pass
+
+
+def operators_ok_unqualified(
+    v=attrgetter("foo"),
+    v2=itemgetter("foo"),
+    v3=methodcaller("foo"),
+):
+    pass
+
+
+def kwonlyargs_immutable(*, value=()):
+    ...
+
+
+# Flag mutable literals/comprehensions
+
+
+def this_is_wrong(value=[1, 2, 3]):
+    ...
+
+
+def this_is_also_wrong(value={}):
+    ...
+
+
+def and_this(value=set()):
+    ...
+
+
+def this_too(value=collections.OrderedDict()):
+    ...
+
+
+async def async_this_too(value=collections.defaultdict()):
+    ...
+
+
+def dont_forget_me(value=collections.deque()):
+    ...
+
+
+# N.B. we're also flagging the function call in the comprehension
+def list_comprehension_also_not_okay(default=[i**2 for i in range(3)]):
+    pass
+
+
+def dict_comprehension_also_not_okay(default={i: i**2 for i in range(3)}):
+    pass
+
+
+def set_comprehension_also_not_okay(default={i**2 for i in range(3)}):
+    pass
+
+
+def kwonlyargs_mutable(*, value=[]):
+    ...
+
+
+# Recommended approach for mutable defaults
+def do_this_instead(value=None):
+    if value is None:
+        value = set()
+
+
+# B008
+# Flag function calls as default args (including if they are part of a sub-expression)
+def in_fact_all_calls_are_wrong(value=time.time()):
+    ...
+
+
+def f(when=dt.datetime.now() + dt.timedelta(days=7)):
+    pass
+
+
+def can_even_catch_lambdas(a=(lambda x: x)()):
+    ...
+
+
+# Recommended approach for function calls as default args
+LOGGER = logging.getLogger(__name__)
+
+
+def do_this_instead_of_calls_in_defaults(logger=LOGGER):
+    # That makes it more obvious that this one value is reused.
+    ...
+
+
+# Handle inf/infinity/nan special case
+def float_inf_okay(value=float("inf")):
+    pass
+
+
+def float_infinity_okay(value=float("infinity")):
+    pass
+
+
+def float_plus_infinity_okay(value=float("+infinity")):
+    pass
+
+
+def float_minus_inf_okay(value=float("-inf")):
+    pass
+
+
+def float_nan_okay(value=float("nan")):
+    pass
+
+
+def float_minus_NaN_okay(value=float("-NaN")):
+    pass
+
+
+def float_infinity_literal(value=float("1e999")):
+    pass
+
+
+# But don't allow standard floats
+def float_int_is_wrong(value=float(3)):
+    pass
+
+
+def float_str_not_inf_or_nan_is_wrong(value=float("3.14")):
+    pass
+
+
+# B006 and B008
+# We should handle arbitrary nesting of these B008.
+def nested_combo(a=[float(3), dt.datetime.now()]):
+    pass
+
+
+# Don't flag nested B006 since we can't guarantee that
+# it isn't made mutable by the outer operation.
+def no_nested_b006(a=map(lambda s: s.upper(), ["a", "b", "c"])):
+    pass
+
+
+# B008-ception.
+def nested_b008(a=random.randint(0, dt.datetime.now().year)):
+    pass
+
+
+# Ignore lambda contents since they are evaluated at call time.
+def foo(f=lambda x: print(x)):
+    f(1)
+
+
+from collections import abc
+from typing import Annotated, Dict, Optional, Sequence, Union, Set
+
+
+def immutable_annotations(
+    a: Sequence[int] | None = [],
+    b: Optional[abc.Mapping[int, int]] = {},
+    c: Annotated[Union[abc.Set[str], abc.Sized], "annotation"] = set(),
+):
+    pass
+
+
+def mutable_annotations(
+    a: list[int] | None = [],
+    b: Optional[Dict[int, int]] = {},
+    c: Annotated[Union[Set[str], abc.Sized], "annotation"] = set(),
+):
+    pass

resources/test/fixtures/B008_extended.py

@@ -0,0 +1,20 @@
+from typing import List
+
+import fastapi
+from fastapi import Query
+
+
+def okay(db=fastapi.Depends(get_db)):
+    ...
+
+
+def okay(data: List[str] = fastapi.Query(None)):
+    ...
+
+
+def okay(data: List[str] = Query(None)):
+    ...
+
+
+def error_due_to_missing_import(data: List[str] = Depends(None)):
+    ...

resources/test/fixtures/B009_B010.py

@@ -0,0 +1,37 @@
+"""
+Should emit:
+B009 - Line 18, 19, 20, 21, 22
+B010 - Line 33, 34, 35, 36
+"""
+
+# Valid getattr usage
+getattr(foo, bar)
+getattr(foo, "bar", None)
+getattr(foo, "bar{foo}".format(foo="a"), None)
+getattr(foo, "bar{foo}".format(foo="a"))
+getattr(foo, bar, None)
+getattr(foo, "123abc")
+getattr(foo, r"123\abc")
+getattr(foo, "except")
+
+# Invalid usage
+getattr(foo, "bar")
+getattr(foo, "_123abc")
+getattr(foo, "abc123")
+getattr(foo, r"abc123")
+_ = lambda x: getattr(x, "bar")
+
+# Valid setattr usage
+setattr(foo, bar, None)
+setattr(foo, "bar{foo}".format(foo="a"), None)
+setattr(foo, "123abc", None)
+setattr(foo, r"123\abc", None)
+setattr(foo, "except", None)
+_ = lambda x: setattr(x, "bar", 1)
+
+# Invalid usage
+setattr(foo, "bar", None)
+setattr(foo, "_123abc", None)
+setattr(foo, "abc123", None)
+setattr(foo, r"abc123", None)
+setattr(foo.bar, r"baz", None)

resources/test/fixtures/B012.py

@@ -0,0 +1,107 @@
+def a():
+    try:
+        pass
+    finally:
+        return  # warning
+
+
+def b():
+    try:
+        pass
+    finally:
+        if 1 + 0 == 2 - 1:
+            return  # warning
+
+
+def c():
+    try:
+        pass
+    finally:
+        try:
+            return  # warning
+        except Exception:
+            pass
+
+
+def d():
+    try:
+        try:
+            pass
+        finally:
+            return  # warning
+    finally:
+        pass
+
+
+def e():
+    if 1 == 2 - 1:
+        try:
+
+            def f():
+                try:
+                    pass
+                finally:
+                    return  # warning
+
+        finally:
+            pass
+
+
+def g():
+    try:
+        pass
+    finally:
+
+        def h():
+            return  # no warning
+
+        e()
+
+
+def i():
+    while True:
+        try:
+            pass
+        finally:
+            break  # warning
+
+            def j():
+                while True:
+                    break  # no warning
+
+
+def h():
+    while True:
+        try:
+            pass
+        finally:
+            continue  # warning
+
+            def j():
+                while True:
+                    continue  # no warning
+
+
+def k():
+    try:
+        pass
+    finally:
+        while True:
+            break  # no warning
+        while True:
+            continue  # no warning
+        while True:
+            return  # warning
+
+
+while True:
+    try:
+        pass
+    finally:
+        continue  # warning
+
+while True:
+    try:
+        pass
+    finally:
+        break  # warning

resources/test/fixtures/B015.py

@@ -0,0 +1,27 @@
+assert 1 == 1
+
+1 == 1
+
+assert 1 in (1, 2)
+
+1 in (1, 2)
+
+
+if 1 == 2:
+    pass
+
+
+def test():
+    assert 1 in (1, 2)
+
+    1 in (1, 2)
+
+
+data = [x for x in [1, 2, 3] if x in (1, 2)]
+
+
+class TestClass:
+    1 == 1
+
+
+print(1 == 1)

resources/test/fixtures/B016.py

@@ -0,0 +1,11 @@
+"""
+Should emit:
+B016 - on lines 6, 7, and 8
+"""
+
+raise False
+raise 1
+raise "string"
+raise Exception(False)
+raise Exception(1)
+raise Exception("string")

resources/test/fixtures/B018.py

@@ -0,0 +1,59 @@
+class Foo1:
+    """abc"""
+
+
+class Foo2:
+    """abc"""
+
+    a = 2
+    "str"  # Str (no raise)
+    f"{int}"  # JoinedStr (no raise)
+    1j  # Number (complex)
+    1  # Number (int)
+    1.0  # Number (float)
+    b"foo"  # Binary
+    True  # NameConstant (True)
+    False  # NameConstant (False)
+    None  # NameConstant (None)
+    [1, 2]  # list
+    {1, 2}  # set
+    {"foo": "bar"}  # dict
+
+
+class Foo3:
+    123
+    a = 2
+    "str"
+    1
+
+
+def foo1():
+    """my docstring"""
+
+
+def foo2():
+    """my docstring"""
+    a = 2
+    "str"  # Str (no raise)
+    f"{int}"  # JoinedStr (no raise)
+    1j  # Number (complex)
+    1  # Number (int)
+    1.0  # Number (float)
+    b"foo"  # Binary
+    True  # NameConstant (True)
+    False  # NameConstant (False)
+    None  # NameConstant (None)
+    [1, 2]  # list
+    {1, 2}  # set
+    {"foo": "bar"}  # dict
+
+
+def foo3():
+    123
+    a = 2
+    "str"
+    3
+
+
+def foo4():
+    ...

resources/test/fixtures/B019.py

@@ -0,0 +1,108 @@
+"""
+Should emit:
+B019 - on lines 73, 77, 81, 85, 89, 93, 97, 101
+"""
+import functools
+from functools import cache, cached_property, lru_cache
+
+
+def some_other_cache():
+    ...
+
+
+@functools.cache
+def compute_func(self, y):
+    ...
+
+
+class Foo:
+    def __init__(self, x):
+        self.x = x
+
+    def compute_method(self, y):
+        ...
+
+    @some_other_cache
+    def user_cached_instance_method(self, y):
+        ...
+
+    @classmethod
+    @functools.cache
+    def cached_classmethod(cls, y):
+        ...
+
+    @classmethod
+    @cache
+    def other_cached_classmethod(cls, y):
+        ...
+
+    @classmethod
+    @functools.lru_cache
+    def lru_cached_classmethod(cls, y):
+        ...
+
+    @classmethod
+    @lru_cache
+    def other_lru_cached_classmethod(cls, y):
+        ...
+
+    @staticmethod
+    @functools.cache
+    def cached_staticmethod(y):
+        ...
+
+    @staticmethod
+    @cache
+    def other_cached_staticmethod(y):
+        ...
+
+    @staticmethod
+    @functools.lru_cache
+    def lru_cached_staticmethod(y):
+        ...
+
+    @staticmethod
+    @lru_cache
+    def other_lru_cached_staticmethod(y):
+        ...
+
+    @functools.cached_property
+    def some_cached_property(self):
+        ...
+
+    @cached_property
+    def some_other_cached_property(self):
+        ...
+
+    # Remaining methods should emit B019
+    @functools.cache
+    def cached_instance_method(self, y):
+        ...
+
+    @cache
+    def another_cached_instance_method(self, y):
+        ...
+
+    @functools.cache()
+    def called_cached_instance_method(self, y):
+        ...
+
+    @cache()
+    def another_called_cached_instance_method(self, y):
+        ...
+
+    @functools.lru_cache
+    def lru_cached_instance_method(self, y):
+        ...
+
+    @lru_cache
+    def another_lru_cached_instance_method(self, y):
+        ...
+
+    @functools.lru_cache()
+    def called_lru_cached_instance_method(self, y):
+        ...
+
+    @lru_cache()
+    def another_called_lru_cached_instance_method(self, y):
+        ...

resources/test/fixtures/B020.py

@@ -0,0 +1,40 @@
+"""
+Should emit:
+B020 - on lines 8, 21, and 36
+"""
+
+items = [1, 2, 3]
+
+for items in items:
+    print(items)
+
+items = [1, 2, 3]
+
+for item in items:
+    print(item)
+
+values = {"secret": 123}
+
+for key, value in values.items():
+    print(f"{key}, {value}")
+
+for key, values in values.items():
+    print(f"{key}, {values}")
+
+# Variables defined in a comprehension are local in scope
+# to that comprehension and are therefore allowed.
+for var in [var for var in range(10)]:
+    print(var)
+
+for var in (var for var in range(10)):
+    print(var)
+
+for k, v in {k: v for k, v in zip(range(10), range(10, 20))}.items():
+    print(k, v)
+
+# However we still call out reassigning the iterable in the comprehension.
+for vars in [i for i in vars]:
+    print(vars)
+
+for var in sorted(range(10), key=lambda var: var.real):
+    print(var)

resources/test/fixtures/B021.py

@@ -0,0 +1,76 @@
+f"""
+Should emit:
+B021 - on lines 14, 22, 30, 38, 46, 54, 62, 70, 73
+"""
+
+VARIABLE = "world"
+
+
+def foo1():
+    """hello world!"""
+
+
+def foo2():
+    f"""hello {VARIABLE}!"""
+
+
+class bar1:
+    """hello world!"""
+
+
+class bar2:
+    f"""hello {VARIABLE}!"""
+
+
+def foo1():
+    """hello world!"""
+
+
+def foo2():
+    f"""hello {VARIABLE}!"""
+
+
+class bar1:
+    """hello world!"""
+
+
+class bar2:
+    f"""hello {VARIABLE}!"""
+
+
+def foo1():
+    "hello world!"
+
+
+def foo2():
+    f"hello {VARIABLE}!"
+
+
+class bar1:
+    "hello world!"
+
+
+class bar2:
+    f"hello {VARIABLE}!"
+
+
+def foo1():
+    "hello world!"
+
+
+def foo2():
+    f"hello {VARIABLE}!"
+
+
+class bar1:
+    "hello world!"
+
+
+class bar2:
+    f"hello {VARIABLE}!"
+
+
+def baz():
+    f"""I'm probably a docstring: {VARIABLE}!"""
+    print(f"""I'm a normal string""")
+    f"""Don't detect me!"""

resources/test/fixtures/B022.py

@@ -0,0 +1,23 @@
+"""
+Should emit:
+B022 - on lines 8
+"""
+
+import contextlib
+from contextlib import suppress
+
+with contextlib.suppress():
+    raise ValueError
+
+with suppress():
+    raise ValueError
+
+with contextlib.suppress(ValueError):
+    raise ValueError
+
+exceptions_to_suppress = []
+if True:
+    exceptions_to_suppress.append(ValueError)
+
+with contextlib.suppress(*exceptions_to_suppress):
+    raise

resources/test/fixtures/B023.py

@@ -0,0 +1,82 @@
+"""
+Should emit:
+B023 - on lines 12, 13, 16, 28, 29, 30, 31, 40, 42, 50, 51, 52, 53, 61, 68.
+"""
+
+functions = []
+z = 0
+
+for x in range(3):
+    y = x + 1
+    # Subject to late-binding problems
+    functions.append(lambda: x)
+    functions.append(lambda: y)  # not just the loop var
+
+    def f_bad_1():
+        return x
+
+    # Actually OK
+    functions.append(lambda x: x * 2)
+    functions.append(lambda x=x: x)
+    functions.append(lambda: z)  # OK because not assigned in the loop
+
+    def f_ok_1(x):
+        return x * 2
+
+
+def check_inside_functions_too():
+    ls = [lambda: x for x in range(2)]
+    st = {lambda: x for x in range(2)}
+    gn = (lambda: x for x in range(2))
+    dt = {x: lambda: x for x in range(2)}
+
+
+async def pointless_async_iterable():
+    yield 1
+
+
+async def container_for_problems():
+    async for x in pointless_async_iterable():
+        functions.append(lambda: x)
+
+    [lambda: x async for x in pointless_async_iterable()]
+
+
+a = 10
+b = 0
+while True:
+    a = a_ = a - 1
+    b += 1
+    functions.append(lambda: a)
+    functions.append(lambda: a_)
+    functions.append(lambda: b)
+    functions.append(lambda: c)  # not a name error because of late binding!
+    c: bool = a > 3
+    if not c:
+        break
+
+# Nested loops should not duplicate reports
+for j in range(2):
+    for k in range(3):
+        lambda: j * k
+
+
+for j, k, l in [(1, 2, 3)]:
+
+    def f():
+        j = None  # OK because it's an assignment
+        [l for k in range(2)]  # error for l, not for k
+
+        assert a and functions
+
+    a.attribute = 1  # modifying an attribute doesn't make it a loop variable
+    functions[0] = lambda: None  # same for an element
+
+for var in range(2):
+
+    def explicit_capture(captured=var):
+        return captured
+
+
+for i in range(3):
+    lambda: f"{i}"

resources/test/fixtures/B024.py

@@ -0,0 +1,129 @@
+"""
+Should emit:
+B024 - on lines 17, 34, 52, 58, 69, 74, 79, 84, 89
+"""
+
+import abc
+import abc as notabc
+from abc import ABC, ABCMeta
+from abc import abstractmethod
+from abc import abstractmethod as abstract
+from abc import abstractmethod as abstractaoeuaoeuaoeu
+from abc import abstractmethod as notabstract
+
+import foo
+
+
+class Base_1(ABC):  # error
+    def method(self):
+        foo()
+
+
+class Base_2(ABC):
+    @abstractmethod
+    def method(self):
+        foo()
+
+
+class Base_3(ABC):
+    @abc.abstractmethod
+    def method(self):
+        foo()
+
+
+class Base_4(ABC):
+    @notabc.abstractmethod
+    def method(self):
+        foo()
+
+
+class Base_5(ABC):
+    @abstract
+    def method(self):
+        foo()
+
+
+class Base_6(ABC):
+    @abstractaoeuaoeuaoeu
+    def method(self):
+        foo()
+
+
+class Base_7(ABC):  # error
+    @notabstract
+    def method(self):
+        foo()
+
+
+class MetaBase_1(metaclass=ABCMeta):  # error
+    def method(self):
+        foo()
+
+
+class MetaBase_2(metaclass=ABCMeta):
+    @abstractmethod
+    def method(self):
+        foo()
+
+
+class abc_Base_1(abc.ABC):  # error
+    def method(self):
+        foo()
+
+
+class abc_Base_2(metaclass=abc.ABCMeta):  # error
+    def method(self):
+        foo()
+
+
+class notabc_Base_1(notabc.ABC):  # error
+    def method(self):
+        foo()
+
+
+class multi_super_1(notabc.ABC, abc.ABCMeta):  # safe
+    def method(self):
+        foo()
+
+
+class multi_super_2(notabc.ABC, metaclass=abc.ABCMeta):  # safe
+    def method(self):
+        foo()
+
+
+class non_keyword_abcmeta_1(ABCMeta):  # safe
+    def method(self):
+        foo()
+
+
+class non_keyword_abcmeta_2(abc.ABCMeta):  # safe
+    def method(self):
+        foo()
+
+
+# very invalid code, but that's up to mypy et al to check
+class keyword_abc_1(metaclass=ABC):  # safe
+    def method(self):
+        foo()
+
+
+class keyword_abc_2(metaclass=abc.ABC):  # safe
+    def method(self):
+        foo()
+
+
+class abc_set_class_variable_1(ABC):  # safe
+    foo: int
+
+
+class abc_set_class_variable_2(ABC):  # safe
+    foo = 2
+
+
+class abc_set_class_variable_3(ABC):  # safe
+    foo: int = 2
+
+
+# this doesn't actually declare a class variable, it's just an expression
+class abc_set_class_variable_4(ABC):  # error
+    foo

resources/test/fixtures/B026.py

@@ -0,0 +1,21 @@
+"""
+Should emit:
+B026 - on lines 16, 17, 18, 19, 20, 21
+"""
+
+
+def foo(bar, baz, bam):
+    print(bar, baz, bam)
+
+
+bar_baz = ["bar", "baz"]
+
+foo("bar", "baz", bam="bam")
+foo("bar", baz="baz", bam="bam")
+foo(bar="bar", baz="baz", bam="bam")
+foo(bam="bam", *["bar", "baz"])
+foo(bam="bam", *bar_baz)
+foo(baz="baz", bam="bam", *["bar"])
+foo(bar="bar", baz="baz", bam="bam", *[])
+foo(bam="bam", *["bar"], *["baz"])
+foo(*["bar"], bam="bam", *["baz"])

resources/test/fixtures/B027.py

@@ -0,0 +1,88 @@
+"""
+Should emit:
+B027 - on lines 12, 15, 18, 22, 30
+"""
+import abc
+from abc import ABC
+from abc import abstractmethod
+from abc import abstractmethod as notabstract
+
+
+class AbstractClass(ABC):
+    def empty_1(self):  # error
+        ...
+
+    def empty_2(self):  # error
+        pass
+
+    def empty_3(self):  # error
+        """docstring"""
+        ...
+
+    def empty_4(self):  # error
+        """multiple ellipsis/pass"""
+        ...
+        pass
+        ...
+        pass
+
+    @notabstract
+    def abstract_0(self):
+        ...
+
+    @abstractmethod
+    def abstract_1(self):
+        ...
+
+    @abstractmethod
+    def abstract_2(self):
+        pass
+
+    @abc.abstractmethod
+    def abstract_3(self):
+        ...
+
+    def body_1(self):
+        print("foo")
+        ...
+
+    def body_2(self):
+        self.body_1()
+
+
+class NonAbstractClass:
+    def empty_1(self):  # safe
+        ...
+
+    def empty_2(self):  # safe
+        pass
+
+
+# ignore @overload, fixes issue #304
+# ignore overload with other imports, fixes #308
+import typing
+import typing as t
+import typing as anything
+from typing import Union, overload
+
+
+class AbstractClass(ABC):
+    @overload
+    def empty_1(self, foo: str):
+        ...
+
+    @typing.overload
+    def empty_1(self, foo: int):
+        ...
+
+    @t.overload
+    def empty_1(self, foo: list):
+        ...
+
+    @anything.overload
+    def empty_1(self, foo: float):
+        ...
+
+    @abstractmethod
+    def empty_1(self, foo: Union[str, int, list, float]):
+        ...

resources/test/fixtures/B904.py

@@ -0,0 +1,55 @@
+"""
+Should emit:
+B904 - on lines 10, 11 and 16
+"""
+
+try:
+    raise ValueError
+except ValueError:
+    if "abc":
+        raise TypeError
+    raise UserWarning
+except AssertionError:
+    raise  # Bare `raise` should not be an error
+except Exception as err:
+    assert err
+    raise Exception("No cause here...")
+except BaseException as base_err:
+    # Might use this instead of bare raise with the `.with_traceback()` method
+    raise base_err
+finally:
+    raise Exception("Nothing to chain from, so no warning here")
+
+try:
+    raise ValueError
+except ValueError:
+    # should not emit, since we are not raising something
+    def proxy():
+        raise NameError
+
+
+try:
+    from preferred_library import Thing
+except ImportError:
+    try:
+        from fallback_library import Thing
+    except ImportError:
+
+        class Thing:
+            def __getattr__(self, name):
+                # same as the case above, should not emit.
+                raise AttributeError
+
+
+try:
+    from preferred_library import Thing
+except ImportError:
+    try:
+        from fallback_library import Thing
+    except ImportError:
+
+        def context_switch():
+            try:
+                raise ValueError
+            except ValueError:
+                raise

resources/test/fixtures/BLE.py

@@ -0,0 +1,55 @@
+try:
+    pass
+except ValueError:
+    pass
+except Exception as e:
+    raise e
+finally:
+    pass
+
+
+try:
+    pass
+except BaseException as e:
+    raise e
+except TypeError:
+    pass
+else:
+    pass
+
+
+try:
+    pass
+except Exception as e:
+    raise e
+except BaseException:
+    pass
+
+
+try:
+    pass
+except Exception:
+    pass
+finally:
+    try:
+        pass
+    except BaseException as e:
+        raise e
+
+
+try:
+    pass
+except Exception as e:
+    try:
+        raise e
+    except BaseException:
+        pass
+
+
+try:
+    try:
+        pass
+    except BaseException as e:
+        raise e
+except Exception:
+    pass

resources/test/fixtures/C400.py

@@ -1 +1,4 @@
 x = list(x for x in range(3))
+x = list(
+    x for x in range(3)
+)

resources/test/fixtures/C401.py

@@ -1 +1,4 @@
 x = set(x for x in range(3))
+x = set(
+    x for x in range(3)
+)

resources/test/fixtures/C402.py

@@ -1 +1,5 @@
-d = dict((x, x) for x in range(3))
+dict((x, x) for x in range(3))
+dict(
+    (x, x) for x in range(3)
+)
+dict(((x, x) for x in range(3)), z=3)

resources/test/fixtures/C403.py

@@ -1 +1,4 @@
 s = set([x for x in range(3)])
+s = set(
+    [x for x in range(3)]
+)

resources/test/fixtures/C404.py

@@ -1 +1,2 @@
-d = dict([(i, i) for i in range(3)])
+dict([(i, i) for i in range(3)])
+dict([(i, i) for i in range(3)], z=4)

resources/test/fixtures/C409.py

@@ -1,3 +1,10 @@
-t1 = tuple([1, 2])
-t2 = tuple((1, 2))
-t3 = tuple([])
+t1 = tuple([])
+t2 = tuple([1, 2])
+t3 = tuple((1, 2))
+t4 = tuple([
+    1,
+    2
+])
+t5 = tuple(
+    (1, 2)
+)

resources/test/fixtures/C413.py

@@ -1,4 +1,6 @@
 x = [2, 3, 1]
+list(x)
 list(sorted(x))
 reversed(sorted(x))
+reversed(sorted(x, key=lambda e: e))
 reversed(sorted(x, reverse=True))

resources/test/fixtures/C901.py

@@ -0,0 +1,138 @@
+# Complexity = 1
+def trivial():
+    pass
+
+
+# Complexity = 1
+def expr_as_statement():
+    0xF00D
+
+
+# Complexity = 1
+def sequential(n):
+    k = n + 4
+    s = k + n
+    return s
+
+
+# Complexity = 3
+def if_elif_else_dead_path(n):
+    if n > 3:
+        return "bigger than three"
+    elif n > 4:
+        return "is never executed"
+    else:
+        return "smaller than or equal to three"
+
+
+# Complexity = 3
+def nested_ifs():
+    if n > 3:
+        if n > 4:
+            return "bigger than four"
+        else:
+            return "bigger than three"
+    else:
+        return "smaller than or equal to three"
+
+
+# Complexity = 2
+def for_loop():
+    for i in range(10):
+        print(i)
+
+
+# Complexity = 2
+def for_else(mylist):
+    for i in mylist:
+        print(i)
+    else:
+        print(None)
+
+
+# Complexity = 2
+def recursive(n):
+    if n > 4:
+        return f(n - 1)
+    else:
+        return n
+
+
+# Complexity = 3
+def nested_functions():
+    def a():
+        def b():
+            pass
+
+        b()
+
+    a()
+
+
+# Complexity = 4
+def try_else():
+    try:
+        print(1)
+    except TypeA:
+        print(2)
+    except TypeB:
+        print(3)
+    else:
+        print(4)
+
+
+# Complexity = 3
+def nested_try_finally():
+    try:
+        try:
+            print(1)
+        finally:
+            print(2)
+    finally:
+        print(3)
+
+
+# Complexity = 3
+async def foobar(a, b, c):
+    await whatever(a, b, c)
+    if await b:
+        pass
+    async with c:
+        pass
+    async for x in a:
+        pass
+
+
+# Complexity = 1
+def annotated_assign():
+    x: Any = None
+
+
+# Complexity = 9
+class Class:
+    def handle(self, *args, **options):
+        if args:
+            return
+
+        class ServiceProvider:
+            def a(self):
+                pass
+
+            def b(self, data):
+                if not args:
+                    pass
+
+        class Logger:
+            def c(*args, **kwargs):
+                pass
+
+            def error(self, message):
+                pass
+
+            def info(self, message):
+                pass
+
+            def exception(self):
+                pass
+
+        return ServiceProvider(Logger())

resources/test/fixtures/D.py

@@ -532,3 +532,37 @@ class Blah:  # noqa: D203,D213
 
 expect(os.path.normcase(__file__ if __file__[-1] != 'c' else __file__[:-1]),
        'D100: Missing docstring in public module')
+
+
+@expect('D201: No blank lines allowed before function docstring (found 1)')
+@expect('D213: Multi-line docstring summary should start at the second line')
+def multiline_leading_space():
+
+    """Leading space.
+
+    More content.
+    """
+
+
+@expect('D202: No blank lines allowed after function docstring (found 1)')
+@expect('D213: Multi-line docstring summary should start at the second line')
+def multiline_trailing_space():
+    """Leading space.
+
+    More content.
+    """
+
+    pass
+
+
+@expect('D201: No blank lines allowed before function docstring (found 1)')
+@expect('D202: No blank lines allowed after function docstring (found 1)')
+@expect('D213: Multi-line docstring summary should start at the second line')
+def multiline_trailing_and_leading_space():
+
+    """Trailing and leading space.
+
+    More content.
+    """
+
+    pass

resources/test/fixtures/E501.py

@@ -5,7 +5,7 @@
 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
 """
 
-_ = """Lorem ipsum dolor sit amet.
+_ = """Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
 
     https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
 
@@ -14,3 +14,38 @@ Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor i
 
 _ = "---------------------------------------------------------------------------AAAAAAA"
 _ = "---------------------------------------------------------------------------亜亜亜亜亜亜亜"
+
+
+def caller(string: str) -> None:
+    assert string is not None
+
+
+caller(
+    """
+    Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+    """,
+)
+
+
+caller(
+    """
+    Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+    """,  # noqa: E501
+)
+
+multiple_strings_per_line = {
+    # OK
+    "Lorem ipsum dolor": "sit amet",
+    # E501 Line too long
+    "Lorem ipsum dolor": "sit amet consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
+    # E501 Line too long
+    "Lorem ipsum dolor": """
+sit amet  consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+""",
+    # OK
+    "Lorem ipsum dolor": "sit amet consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",  # noqa: E501
+    # OK
+    "Lorem ipsum dolor": """
+sit amet  consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+""",  # noqa: E501
+}

resources/test/fixtures/E711.py

@@ -23,6 +23,9 @@ if None != res[1]:
 if None == res[1]:
     pass
 
+if x == None != None:
+    pass
+
 #: Okay
 if x not in y:
     pass

resources/test/fixtures/E712.py

@@ -22,6 +22,9 @@ var = 1 if cond == True else -1 if cond == False else cond
 if (True) == TrueElement or x == TrueElement:
     pass
 
+if res == True != False:
+    pass
+
 #: Okay
 if x not in y:
     pass

resources/test/fixtures/E731.py

@@ -8,14 +8,14 @@ while False:
 
 
 f = object()
-#: E731
 f.method = lambda: "Method"
 
 f = {}
-#: E731
 f["a"] = lambda x: x ** 2
 
 f = []
 f.append(lambda x: x ** 2)
 
+f = g = lambda x: x ** 2
+
 lambda: "no-op"

resources/test/fixtures/F401_0.py

@@ -28,7 +28,6 @@ from blah import ClassA, ClassB, ClassC
 if TYPE_CHECKING:
     from models import Fruit, Nut, Vegetable
 
-
 if TYPE_CHECKING:
     import shelve
     import importlib

resources/test/fixtures/F401_6.py

@@ -0,0 +1,20 @@
+"""Test: explicit re-export."""
+
+# OK
+from .applications import FastAPI as FastAPI
+
+# F401 `background.BackgroundTasks` imported but unused
+from .background import BackgroundTasks
+
+# F401 `datastructures.UploadFile` imported but unused
+from .datastructures import UploadFile as FileUpload
+
+
+# OK
+import applications as applications
+
+# F401 `background` imported but unused
+import background
+
+# F401 `datastructures` imported but unused
+import datastructures as structures

resources/test/fixtures/F521.py

@@ -0,0 +1,21 @@
+"{".format(1)
+"}".format(1)
+"{foo[}".format(foo=1)
+# too much string recursion (placeholder-in-placeholder)
+"{:{:{}}}".format(1, 2, 3)
+# ruff picks these issues up, but flake8 doesn't
+"{foo[]}".format(foo={"": 1})
+"{foo..}".format(foo=1)
+"{foo..bar}".format(foo=1)
+
+# The following are all "good" uses of .format
+"{.__class__}".format("")
+"{foo[bar]}".format(foo={"bar": "barv"})
+"{[bar]}".format({"bar": "barv"})
+"{:{}} {}".format(1, 15, 2)
+"{:2}".format(1)
+"{foo}-{}".format(1, foo=2)
+a = ()
+"{}".format(*a)
+k = {}
+"{foo}".format(**k)

resources/test/fixtures/F522.py

@@ -0,0 +1,4 @@
+"{}".format(1, bar=2)  # F522
+"{bar}{}".format(1, bar=2, spam=3)  # F522
+"{bar:{spam}}".format(bar=2, spam=3)  # No issues
+"{bar:{spam}}".format(bar=2, spam=3, eggs=4, ham=5)  # F522

resources/test/fixtures/F523.py

@@ -0,0 +1,12 @@
+# With indexes
+"{0}".format(1, 2)  # F523
+"{1}".format(1, 2, 3)  # F523
+"{1:{0}}".format(1, 2)  # No issues
+"{1:{0}}".format(1, 2, 3)  # F523
+"{0}{2}".format(1, 2)  # F523, # F524
+
+# With no indexes
+"{}".format(1, 2)  # F523
+"{}".format(1, 2, 3)  # F523
+"{:{}}".format(1, 2)  # No issues
+"{:{}}".format(1, 2, 3)  # F523

resources/test/fixtures/F524.py

@@ -0,0 +1,6 @@
+"{} {}".format(1)  # F524
+"{2}".format()  # F524
+"{bar}".format()  # F524
+"{0} {bar}".format(1)  # F524
+"{0} {bar}".format()  # F524
+"{bar} {0}".format()  # F524

resources/test/fixtures/F525.py

@@ -0,0 +1,2 @@
+"{} {1}".format(1, 2)  # F525
+"{0} {}".format(1, 2)  # F523, F525

resources/test/fixtures/F632.py

@@ -3,3 +3,6 @@ if x is "abc":
 
 if 123 is not y:
     pass
+
+if "123" is x < 3:
+    pass

resources/test/fixtures/F821_1.py

@@ -0,0 +1,30 @@
+"""Test: typing module imports."""
+from foo import cast
+
+# OK
+x = cast("Model")
+
+from typing import cast
+
+
+# F821 Undefined name `Model`
+x = cast("Model", x)
+
+
+import typing
+
+
+# F821 Undefined name `Model`
+x = typing.cast("Model", x)
+
+
+from typing import Pattern
+
+# F821 Undefined name `Model`
+x = Pattern["Model"]
+
+
+from typing.re import Match
+
+# F821 Undefined name `Model`
+x = Match["Model"]

resources/test/fixtures/F821_2.py

@@ -0,0 +1,18 @@
+"""Test: typing_extensions module imports."""
+from foo import Literal
+
+# F821 Undefined name `Model`
+x: Literal["Model"]
+
+from typing_extensions import Literal
+
+
+# OK
+x: Literal["Model"]
+
+
+import typing_extensions
+
+
+# OK
+x: typing_extensions.Literal["Model"]

resources/test/fixtures/F821_3.py

@@ -0,0 +1,24 @@
+"""Test (edge case): accesses of object named `dict`."""
+
+# OK
+dict = {"parameters": {}}
+dict["parameters"]["userId"] = "userId"
+dict["parameters"]["itemId"] = "itemId"
+del dict["parameters"]["itemId"]
+
+# F821 Undefined name `key`
+# F821 Undefined name `value`
+x: dict["key", "value"]
+
+# OK
+x: dict[str, str]
+
+# OK
+def unimportant(name):
+    pass
+
+
+def dang(dict, set, list):
+    unimportant(name=dict["name"])
+    unimportant(name=set["name"])
+    unimportant(name=list["name"])

resources/test/fixtures/F821_4.py

@@ -0,0 +1,24 @@
+"""Test: import alias tracking."""
+from typing import List
+
+_ = List["Model"]
+
+
+from typing import List as IList
+
+_ = IList["Model"]
+
+
+from collections.abc import ItemsView
+
+_ = ItemsView["Model"]
+
+
+import collections.abc
+
+_ = collections.abc.ItemsView["Model"]
+
+
+from collections import abc
+
+_ = abc.ItemsView["Model"]

resources/test/fixtures/F821_5.py

@@ -0,0 +1,14 @@
+"""Test: inner class annotation."""
+
+
+class RandomClass:
+    def random_func(self) -> "InnerClass":
+        pass
+
+
+class OuterClass:
+    class InnerClass:
+        pass
+
+    def failing_func(self) -> "InnerClass":
+        return self.InnerClass()

resources/test/fixtures/F841.py

@@ -35,3 +35,33 @@ def f4():
     _ = 1
     __ = 1
     _discarded = 1
+
+
+a = 1
+
+
+def f5():
+    global a
+
+    # Used in `f7` via `nonlocal`.
+    b = 1
+
+    def f6():
+        # F841
+        b = 1
+
+    def f7():
+        nonlocal b
+
+
+def f6():
+    annotations = []
+    assert len([annotations for annotations in annotations])
+
+
+def f7():
+    def connect():
+        return None, None
+
+    with connect() as (connection, cursor):
+        cursor.execute("SELECT * FROM users")

resources/test/fixtures/FBT.py

@@ -0,0 +1,42 @@
+def function(
+    posonly_nohint,
+    posonly_nonboolhint: int,
+    posonly_boolhint: bool,
+    posonly_boolstrhint: "bool",
+    /,
+    offset,
+    posorkw_nonvalued_nohint,
+    posorkw_nonvalued_nonboolhint: int,
+    posorkw_nonvalued_boolhint: bool,
+    posorkw_nonvalued_boolstrhint: "bool",
+    posorkw_boolvalued_nohint=True,
+    posorkw_boolvalued_nonboolhint: int = True,
+    posorkw_boolvalued_boolhint: bool = True,
+    posorkw_boolvalued_boolstrhint: "bool" = True,
+    posorkw_nonboolvalued_nohint=1,
+    posorkw_nonboolvalued_nonboolhint: int = 2,
+    posorkw_nonboolvalued_boolhint: bool = 3,
+    posorkw_nonboolvalued_boolstrhint: "bool" = 4,
+    *,
+    kwonly_nonvalued_nohint,
+    kwonly_nonvalued_nonboolhint: int,
+    kwonly_nonvalued_boolhint: bool,
+    kwonly_nonvalued_boolstrhint: "bool",
+    kwonly_boolvalued_nohint=True,
+    kwonly_boolvalued_nonboolhint: int = False,
+    kwonly_boolvalued_boolhint: bool = True,
+    kwonly_boolvalued_boolstrhint: "bool" = True,
+    kwonly_nonboolvalued_nohint=5,
+    kwonly_nonboolvalued_nonboolhint: int = 1,
+    kwonly_nonboolvalued_boolhint: bool = 1,
+    kwonly_nonboolvalued_boolstrhint: "bool" = 1,
+    **kw,
+):
+    ...
+
+
+def used(do):
+    return do
+
+used("a", True)
+used(do=True)

resources/test/fixtures/I252.py

@@ -0,0 +1,12 @@
+from . import sibling
+from .sibling import example
+
+from .. import parent
+from ..parent import example
+
+from ... import grandparent
+from ...grandparent import example
+
+import other
+import other.example
+from other import example

resources/test/fixtures/M001.py

@@ -18,6 +18,14 @@ def f() -> None:
     # Invalid (and unimplemented)
     d = 1  # noqa: F841, W191
 
+    # fmt: off
+    # Invalid - no space before #
+    d = 1# noqa: E501
+
+    # Invalid - many spaces before #
+    d = 1                       # noqa: E501
+    # fmt: on
+
 
 # Valid
 _ = """Lorem ipsum dolor sit amet.

resources/test/fixtures/N803.py

@@ -1,7 +1,7 @@
-def func(a, A):
-    return a, A
+def func(_, a, A):
+    return _, a, A
 
 
 class Class:
-    def method(self, a, A):
-        return a, A
+    def method(self, _, a, A):
+        return _, a, A

resources/test/fixtures/N804.py

@@ -1,19 +1,51 @@
+from abc import ABCMeta
+
+
 class Class:
-    @classmethod
-    def bad_class_method(this):
+    def bad_method(this):
+        pass
+
+    if False:
+
+        def extra_bad_method(this):
+            pass
+
+    def good_method(self):
         pass
 
     @classmethod
-    def good_class_method(cls):
-        pass
-
-    def method(self):
+    def class_method(cls):
         pass
 
     @staticmethod
     def static_method(x):
         return x
 
+    def __init__(self):
+        ...
+
+    def __new__(cls, *args, **kwargs):
+        ...
+
+    def __init_subclass__(self, default_name, **kwargs):
+        ...
+
+    @classmethod
+    def class_method_with_positional_only_argument(cls, x, /, other):
+        ...
+
+    @classmethod
+    def bad_class_method_with_positional_only_argument(self, x, /, other):
+        ...
+
+
+class MetaClass(ABCMeta):
+    def bad_method(self):
+        pass
+
+    def good_method(cls):
+        pass
+
 
 def func(x):
     return x

resources/test/fixtures/N805.py

@@ -1,11 +1,13 @@
-import random
+from abc import ABCMeta
+
+import pydantic
 
 
 class Class:
     def bad_method(this):
         pass
 
-    if random.random(0, 2) == 0:
+    if False:
 
         def extra_bad_method(this):
             pass
@@ -21,6 +23,31 @@ class Class:
     def static_method(x):
         return x
 
+    @pydantic.validator
+    def lower(cls, my_field: str) -> str:
+        pass
+
+    @pydantic.validator("my_field")
+    def lower(cls, my_field: str) -> str:
+        pass
+
+    def __init__(self):
+        ...
+
+    def __new__(cls, *args, **kwargs):
+        ...
+
+    def __init_subclass__(self, default_name, **kwargs):
+        ...
+
+
+class MetaClass(ABCMeta):
+    def bad_method(self):
+        pass
+
+    def good_method(cls):
+        pass
+
 
 def func(x):
     return x

resources/test/fixtures/N806.py

@@ -1,4 +1,15 @@
+import collections
+from collections import namedtuple
+
+GLOBAL: str = "foo"
+
+
 def f():
+    global GLOBAL
+    GLOBAL = "bar"
     lower = 0
     Camel = 0
     CONSTANT = 0
+    _ = 0
+    MyObj1 = collections.namedtuple("MyObj1", ["a", "b"])
+    MyObj2 = namedtuple("MyObj12", ["a", "b"])

resources/test/fixtures/N807.py

@@ -10,6 +10,27 @@ def good__():
     pass
 
 
+def nested():
+    def __bad__():
+        pass
+
+    def __good():
+        pass
+
+    def good__():
+        pass
+
+
 class Class:
     def __good__(self):
         pass
+
+
+# https://peps.python.org/pep-0562/
+def __getattr__(name):
+    pass
+
+
+# https://peps.python.org/pep-0562/
+def __dir__():
+    pass

resources/test/fixtures/N815.py

@@ -1,6 +1,12 @@
+import collections
+from collections import namedtuple
+
+
 class C:
     lower = 0
     CONSTANT = 0
     mixedCase = 0
     _mixedCase = 0
     mixed_Case = 0
+    myObj1 = collections.namedtuple("MyObj1", ["a", "b"])
+    myObj2 = namedtuple("MyObj2", ["a", "b"])

resources/test/fixtures/N816.py

@@ -1,5 +1,10 @@
+import collections
+from collections import namedtuple
+
 lower = 0
 CONSTANT = 0
 mixedCase = 0
 _mixedCase = 0
 mixed_Case = 0
+myObj1 = collections.namedtuple("MyObj1", ["a", "b"])
+myObj2 = namedtuple("MyObj2", ["a", "b"])

resources/test/fixtures/N818.py

@@ -8,3 +8,11 @@ class AnotherError(Exception):
 
 class C(Exception):
     pass
+
+
+class D(BaseException):
+    pass
+
+
+class E(AnotherError):
+    pass

resources/test/fixtures/RUF001.py

@@ -0,0 +1,7 @@
+x = "𝐁ad string"
+
+
+def f():
+    """Here's a docstring with an unusual parenthesis: ）"""
+    # And here's a comment with an unusual punctuation mark: ᜵
+    ...

resources/test/fixtures/RUF002.py

@@ -0,0 +1,7 @@
+x = "𝐁ad string"
+
+
+def f():
+    """Here's a docstring with an unusual parenthesis: ）"""
+    # And here's a comment with an unusual punctuation mark: ᜵
+    ...

resources/test/fixtures/RUF003.py

@@ -0,0 +1,7 @@
+x = "𝐁ad string"
+
+
+def f():
+    """Here's a docstring with an unusual parenthesis: ）"""
+    # And here's a comment with an unusual punctuation mark: ᜵
+    ...

resources/test/fixtures/RUF101_0.py

@@ -0,0 +1,5 @@
+exit(0)
+
+
+def main():
+    exit(2)

resources/test/fixtures/RUF101_1.py

@@ -0,0 +1,10 @@
+import sys
+
+exit(0)
+
+
+def main():
+    exit(1)
+
+
+sys.exit(2)

resources/test/fixtures/RUF101_2.py

@@ -0,0 +1,7 @@
+import sys as sys2
+
+exit(0)
+
+
+def main():
+    exit(1)

resources/test/fixtures/RUF101_3.py

@@ -0,0 +1,7 @@
+from sys import exit
+
+exit(0)
+
+
+def main():
+    exit(1)

resources/test/fixtures/RUF101_4.py

@@ -0,0 +1,7 @@
+from sys import exit as exit2
+
+exit(0)
+
+
+def main():
+    exit(1)

resources/test/fixtures/RUF101_5.py

@@ -0,0 +1,7 @@
+from sys import *
+
+exit(0)
+
+
+def main():
+    exit(1)

resources/test/fixtures/RUF101_6.py

@@ -0,0 +1,12 @@
+exit(0)
+
+
+def exit(e):
+    pass
+
+
+exit(1)
+
+
+def main():
+    exit(2)

resources/test/fixtures/S101.py

@@ -0,0 +1,11 @@
+# Error
+assert True
+
+def fn():
+    x = 1
+
+    # Error
+    assert x == 1
+
+    # Error
+    assert x == 2

resources/test/fixtures/S102.py

@@ -0,0 +1,5 @@
+def fn():
+    # Error
+    exec('x = 2')
+
+exec('y = 3')

resources/test/fixtures/S104.py

@@ -0,0 +1,19 @@
+def func(address):
+    print(address)
+
+
+# OK
+"OK"
+
+# Error
+"0.0.0.0"
+'0.0.0.0'
+
+
+# Error
+func("0.0.0.0")
+
+
+def my_func():
+    x = "0.0.0.0"
+    print(x)

resources/test/fixtures/S105.py

@@ -0,0 +1,53 @@
+d = {}
+
+# OK
+safe = "s3cr3t"
+password = True
+password = safe
+password is True
+password == 1
+d["safe"] = "s3cr3t"
+
+# Errors
+password = "s3cr3t"
+_pass = "s3cr3t"
+passwd = "s3cr3t"
+pwd = "s3cr3t"
+secret = "s3cr3t"
+token = "s3cr3t"
+secrete = "s3cr3t"
+safe = password = "s3cr3t"
+password = safe = "s3cr3t"
+
+d["password"] = "s3cr3t"
+d["pass"] = "s3cr3t"
+d["passwd"] = "s3cr3t"
+d["pwd"] = "s3cr3t"
+d["secret"] = "s3cr3t"
+d["token"] = "s3cr3t"
+d["secrete"] = "s3cr3t"
+safe = d["password"] = "s3cr3t"
+d["password"] = safe = "s3cr3t"
+
+
+class MyClass:
+    password = "s3cr3t"
+    safe = password
+
+
+MyClass.password = "s3cr3t"
+MyClass._pass = "s3cr3t"
+MyClass.passwd = "s3cr3t"
+MyClass.pwd = "s3cr3t"
+MyClass.secret = "s3cr3t"
+MyClass.token = "s3cr3t"
+MyClass.secrete = "s3cr3t"
+
+password == "s3cr3t"
+_pass == "s3cr3t"
+passwd == "s3cr3t"
+pwd == "s3cr3t"
+secret == "s3cr3t"
+token == "s3cr3t"
+secrete == "s3cr3t"
+password == safe == "s3cr3t"

resources/test/fixtures/S106.py

@@ -0,0 +1,13 @@
+def func(pos, password):
+    pass
+
+
+string = "Hello World"
+
+# OK
+func("s3cr3t")
+func(1, password=string)
+func(pos="s3cr3t", password=string)
+
+# Error
+func(1, password="s3cr3t")