Bump version to 0.0.113

Default to isort's import sort logic (#691 )
Add a separate local folder category for imports (#690 )
2022-11-11 22:42:02 -05:00 · 2022-11-11 22:41:39 -05:00 · 2022-11-11 22:12:48 -05:00 · 2022-11-11 20:39:37 -05:00 · 2022-11-11 19:07:40 -05:00 · 2022-11-11 17:13:04 -05:00
249 changed files with 8233 additions and 1399 deletions
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[alias]
+dev = "run --package ruff_dev --bin ruff_dev"
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.103
+    rev: v0.0.113
    hooks:
      - id: ruff

--- a/CONTRIBUTING.md
+++ b/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. 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.
@@ -103,9 +100,9 @@ acceptable unused variables (e.g., `_`).

 ## 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).
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,7 +14,7 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
 dependencies = [
- "getrandom 0.2.7",
+ "getrandom 0.2.8",
 "once_cell",
 "version_check",
 ]
@@ -51,9 +51,9 @@ checksum = "c7021ce4924a3f25f802b2cccd1af585e39ea1a363a1aa2e72afe54b67a3a7a7"

 [[package]]
 name = "anyhow"
-version = "1.0.65"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98161a4e3e2184da77bb14f02184cdd111e83bbbcc9979dfee3c44b9a85f5602"
+checksum = "216261ddc8289130e551ddcd5ce8a064710c0d064a4d2895c67151c92b5443f6"

 [[package]]
 name = "ascii"
@@ -72,11 +72,11 @@ dependencies = [

 [[package]]
 name = "assert_cmd"
-version = "2.0.4"
+version = "2.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93ae1ddd39efd67689deb1979d80bad3bf7f2b09c6e6117c8d1f2443b5e2f83e"
+checksum = "ba45b8163c49ab5f972e59a8a5a03b6d2972619d486e19ec9fe744f7c2753d3c"
 dependencies = [
- "bstr",
+ "bstr 1.0.1",
 "doc-comment",
 "predicates",
 "predicates-core",
@@ -111,9 +111,9 @@ dependencies = [

 [[package]]
 name = "async-global-executor"
-version = "2.3.0"
+version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0da5b41ee986eed3f524c380e6d64965aea573882a8907682ad100f7859305ca"
+checksum = "f1b6f5d7df27bd294849f8eec66ecfc63d11814df7a4f5d74168a2394467b776"
 dependencies = [
 "async-channel",
 "async-executor",
@@ -126,16 +126,16 @@ dependencies = [

 [[package]]
 name = "async-io"
-version = "1.9.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83e21f3a490c72b3b0cf44962180e60045de2925d8dff97918f7ee43c8f637c7"
+checksum = "e8121296a9f05be7f34aa4196b1747243b3b62e048bb7906f644f3fbfc490cf7"
 dependencies = [
+ "async-lock",
 "autocfg",
 "concurrent-queue",
 "futures-lite",
 "libc",
 "log",
- "once_cell",
 "parking",
 "polling",
 "slab",
@@ -146,11 +146,12 @@ dependencies = [

 [[package]]
 name = "async-lock"
-version = "2.5.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e97a171d191782fba31bb902b14ad94e24a68145032b7eedf871ab0bc0d077b6"
+checksum = "c8101efe8695a6c17e02911402145357e718ac92d3ff88ae8419e84b1707b685"
 dependencies = [
 "event-listener",
+ "futures-lite",
 ]

 [[package]]
@@ -238,9 +239,9 @@ dependencies = [

 [[package]]
 name = "base64"
-version = "0.13.0"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
+checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"

 [[package]]
 name = "bincode"
@@ -328,10 +329,22 @@ dependencies = [
 ]

 [[package]]
-name = "bumpalo"
-version = "3.11.0"
+name = "bstr"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1ad822118d20d2c234f427000d5acc36eabe1e29a348c89b63dd60b13f28e5d"
+checksum = "fca0852af221f458706eb0725c03e4ed6c46af9ac98e6a689d5e634215d594dd"
+dependencies = [
+ "memchr",
+ "once_cell",
+ "regex-automata",
+ "serde",
+]
+
+[[package]]
+name = "bumpalo"
+version = "3.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "572f695136211188308f16ad2ca5c851a712c464060ae6974944458eb83880ba"

 [[package]]
 name = "byte-tools"
@@ -382,9 +395,9 @@ checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"

 [[package]]
 name = "cc"
-version = "1.0.73"
+version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+checksum = "41ca34107f97baef6cfb231b32f36115781856b8f8208e8c580e0bcaea374842"

 [[package]]
 name = "cfg-if"
@@ -464,14 +477,14 @@ dependencies = [
 "bitflags",
 "clap_lex 0.2.4",
 "indexmap",
- "textwrap 0.16.0",
+ "textwrap",
 ]

 [[package]]
 name = "clap"
-version = "4.0.15"
+version = "4.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bf8832993da70a4c6d13c581f4463c2bdda27b9bf1c5498dc4365543abe6d6f"
+checksum = "91b9970d7505127a162fdaa9b96428d28a479ba78c9ec7550a63a5d9863db682"
 dependencies = [
 "atty",
 "bitflags",
@@ -484,9 +497,9 @@ dependencies = [

 [[package]]
 name = "clap_derive"
-version = "4.0.13"
+version = "4.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c42f169caba89a7d512b5418b09864543eeb4d497416c917d7137863bd2076ad"
+checksum = "0177313f9f02afc995627906bbd8967e2be069f5261954222dac78290c2b9014"
 dependencies = [
 "heck",
 "proc-macro-error",
@@ -701,9 +714,9 @@ checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"

 [[package]]
 name = "ctor"
-version = "0.1.23"
+version = "0.1.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdffe87e1d521a10f9696f833fe502293ea446d7f256c06128293a4119bdf4cb"
+checksum = "6d2301688392eb071b0bf1a37be05c469d3cc4dbbd95df672fe28ab021e6a096"
 dependencies = [
 "quote",
 "syn",
@@ -711,9 +724,9 @@ dependencies = [

 [[package]]
 name = "cxx"
-version = "1.0.78"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19f39818dcfc97d45b03953c1292efc4e80954e1583c4aa770bac1383e2310a4"
+checksum = "97abf9f0eca9e52b7f81b945524e76710e6cb2366aead23b7d4fbf72e281f888"
 dependencies = [
 "cc",
 "cxxbridge-flags",
@@ -723,9 +736,9 @@ dependencies = [

 [[package]]
 name = "cxx-build"
-version = "1.0.78"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e580d70777c116df50c390d1211993f62d40302881e54d4b79727acb83d0199"
+checksum = "7cc32cc5fea1d894b77d269ddb9f192110069a8a9c1f1d441195fba90553dea3"
 dependencies = [
 "cc",
 "codespan-reporting",
@@ -738,15 +751,15 @@ dependencies = [

 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.78"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56a46460b88d1cec95112c8c363f0e2c39afdb237f60583b0b36343bf627ea9c"
+checksum = "8ca220e4794c934dc6b1207c3b42856ad4c302f2df1712e9f8d2eec5afaacf1f"

 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.78"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "747b608fecf06b0d72d440f27acc99288207324b793be2c17991839f3d4995ea"
+checksum = "b846f081361125bfc8dc9d3940c84e1fd83ba54bbca7b17cd29483c828be0704"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -902,9 +915,9 @@ dependencies = [

 [[package]]
 name = "filetime"
-version = "0.2.17"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e94a7bbaa59354bc20dd75b67f23e2797b4490e9d6928203fb105c79e448c86c"
+checksum = "4b9663d381d07ae25dc88dbdf27df458faa83a9b25336bcac83d5e452b5fc9d3"
 dependencies = [
 "cfg-if 1.0.0",
 "libc",
@@ -920,10 +933,10 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.103-dev.0"
+version = "0.0.113-dev.0"
 dependencies = [
 "anyhow",
- "clap 4.0.15",
+ "clap 4.0.22",
 "configparser",
 "once_cell",
 "regex",
@@ -995,9 +1008,9 @@ checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"

 [[package]]
 name = "futures"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f21eda599937fba36daeb58a22e8f5cee2d14c4a17b5b7739c7c8e5e3b8230c"
+checksum = "38390104763dc37a5145a53c29c63c1290b5d316d6086ec32c293f6736051bb0"
 dependencies = [
 "futures-channel",
 "futures-core",
@@ -1010,9 +1023,9 @@ dependencies = [

 [[package]]
 name = "futures-channel"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30bdd20c28fadd505d0fd6712cdfcb0d4b5648baf45faef7f852afb2399bb050"
+checksum = "52ba265a92256105f45b719605a571ffe2d1f0fea3807304b522c1d778f79eed"
 dependencies = [
 "futures-core",
 "futures-sink",
@@ -1020,15 +1033,15 @@ dependencies = [

 [[package]]
 name = "futures-core"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e5aa3de05362c3fb88de6531e6296e85cde7739cccad4b9dfeeb7f6ebce56bf"
+checksum = "04909a7a7e4633ae6c4a9ab280aeb86da1236243a77b694a49eacd659a4bd3ac"

 [[package]]
 name = "futures-executor"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ff63c23854bee61b6e9cd331d523909f238fc7636290b96826e9cfa5faa00ab"
+checksum = "7acc85df6714c176ab5edf386123fafe217be88c0840ec11f199441134a074e2"
 dependencies = [
 "futures-core",
 "futures-task",
@@ -1037,9 +1050,9 @@ dependencies = [

 [[package]]
 name = "futures-io"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbf4d2a7a308fd4578637c0b17c7e1c7ba127b8f6ba00b29f717e9655d85eb68"
+checksum = "00f5fb52a06bdcadeb54e8d3671f8888a39697dcb0b81b23b55174030427f4eb"

 [[package]]
 name = "futures-lite"
@@ -1058,9 +1071,9 @@ dependencies = [

 [[package]]
 name = "futures-macro"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42cd15d1c7456c04dbdf7e88bcd69760d74f3a798d6444e16974b505b0e62f17"
+checksum = "bdfb8ce053d86b91919aad980c220b1fb8401a9394410e1c289ed7e66b61835d"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1069,21 +1082,21 @@ dependencies = [

 [[package]]
 name = "futures-sink"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21b20ba5a92e727ba30e72834706623d94ac93a725410b6a6b6fbc1b07f7ba56"
+checksum = "39c15cf1a4aa79df40f1bb462fb39676d0ad9e366c2a33b590d7c66f4f81fcf9"

 [[package]]
 name = "futures-task"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6508c467c73851293f390476d4491cf4d227dbabcd4170f3bb6044959b294f1"
+checksum = "2ffb393ac5d9a6eaa9d3fdf37ae2776656b706e200c8e16b1bdb227f5198e6ea"

 [[package]]
 name = "futures-util"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44fb6cb1be61cc1d2e43b262516aafcf63b241cffdb1d3fa115f91d9c7b09c90"
+checksum = "197676987abd2f9cadff84926f410af1c183608d36641465df73ae8211dc65d6"
 dependencies = [
 "futures-channel",
 "futures-core",
@@ -1129,9 +1142,9 @@ dependencies = [

 [[package]]
 name = "getrandom"
-version = "0.2.7"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
+checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
 dependencies = [
 "cfg-if 1.0.0",
 "js-sys",
@@ -1208,9 +1221,9 @@ checksum = "dfa686283ad6dd069f105e5ab091b04c62850d3e4cf5d67debad1933f55023df"

 [[package]]
 name = "iana-time-zone"
-version = "0.1.51"
+version = "0.1.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5a6ef98976b22b3b7f2f3a806f858cb862044cfa66805aa3ad84cb3d3b785ed"
+checksum = "64c122667b287044802d6ce17ee2ddf13207ed924c712de9a66a5814d5b64765"
 dependencies = [
 "android_system_properties",
 "core-foundation-sys",
@@ -1222,9 +1235,9 @@ dependencies = [

 [[package]]
 name = "iana-time-zone-haiku"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fde6edd6cef363e9359ed3c98ba64590ba9eecba2293eb5a723ab32aee8926aa"
+checksum = "0703ae284fc167426161c2e3f1da3ea71d94b21bedbcc9494e92b28e334e3dca"
 dependencies = [
 "cxx",
 "cxx-build",
@@ -1427,14 +1440,14 @@ dependencies = [

 [[package]]
 name = "libc"
-version = "0.2.135"
+version = "0.2.137"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68783febc7782c6c5cb401fbda4de5a9898be1762314da0bb2c10ced61f18b0c"
+checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"

 [[package]]
 name = "libcst"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/LibCST?rev=32a044c127668df44582f85699358e67803b0d73#32a044c127668df44582f85699358e67803b0d73"
+source = "git+https://github.com/charliermarsh/LibCST?rev=a13ec97dd4eb925bde4d426c6e422582793b260c#a13ec97dd4eb925bde4d426c6e422582793b260c"
 dependencies = [
 "chic",
 "itertools",
@@ -1449,7 +1462,7 @@ dependencies = [
 [[package]]
 name = "libcst_derive"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/LibCST?rev=32a044c127668df44582f85699358e67803b0d73#32a044c127668df44582f85699358e67803b0d73"
+source = "git+https://github.com/charliermarsh/LibCST?rev=a13ec97dd4eb925bde4d426c6e422582793b260c#a13ec97dd4eb925bde4d426c6e422582793b260c"
 dependencies = [
 "quote",
 "syn",
@@ -1583,9 +1596,9 @@ dependencies = [

 [[package]]
 name = "net2"
-version = "0.2.37"
+version = "0.2.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "391630d12b68002ae1e25e8f974306474966550ad82dac6886fb8910c19568ae"
+checksum = "74d0df99cfcd2530b2e694f6e17e7f37b8e26bb23983ac530c0c97408837c631"
 dependencies = [
 "cfg-if 0.1.10",
 "libc",
@@ -1609,6 +1622,12 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "nohash-hasher"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bf50223579dc7cdcfb3bfcacf7069ff68243f8c363f62ffa99cf000a6b9c451"
+
 [[package]]
 name = "nom"
 version = "5.1.2"
@@ -1680,9 +1699,9 @@ dependencies = [

 [[package]]
 name = "num_cpus"
-version = "1.13.1"
+version = "1.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
+checksum = "f6058e64324c71e02bc2b150e4f3bc8286db6c83092132ffa3f6b1eab0f9def5"
 dependencies = [
 "hermit-abi",
 "libc",
@@ -1690,9 +1709,9 @@ dependencies = [

 [[package]]
 name = "once_cell"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e82dad04139b71a90c080c8463fe0dc7902db5192d939bd0950f074d014339e1"
+checksum = "86f0b0d4bf799edbc74508c1e8bf170ff5f41238e5f8225603ca7caaae2b7860"

 [[package]]
 name = "oorandom"
@@ -1714,9 +1733,9 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"

 [[package]]
 name = "os_str_bytes"
-version = "6.3.0"
+version = "6.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ff7415e9ae3fff1225851df9e0d9e4e5479f947619774677a63572e55e80eff"
+checksum = "3baf96e39c5359d2eb0dd6ccb42c62b91d9678aa68160d261b9e0ccbf9e9dea9"

 [[package]]
 name = "parking"
@@ -1736,9 +1755,9 @@ dependencies = [

 [[package]]
 name = "parking_lot_core"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09a279cbf25cb0757810394fbc1e359949b59e348145c643a939a525692e6929"
+checksum = "4dc9e0dc2adc1c69d09143aff38d3d30c5c3f0df0dad82e6d25547af174ebec0"
 dependencies = [
 "cfg-if 1.0.0",
 "libc",
@@ -1938,9 +1957,9 @@ dependencies = [

 [[package]]
 name = "polling"
-version = "2.3.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "899b00b9c8ab553c743b3e11e87c5c7d423b2a2de229ba95b24a756344748011"
+checksum = "ab4609a838d88b73d8238967b60dd115cc08d38e2bbaf51ee1e4b695f89122e2"
 dependencies = [
 "autocfg",
 "cfg-if 1.0.0",
@@ -1952,9 +1971,9 @@ dependencies = [

 [[package]]
 name = "ppv-lite86"
-version = "0.2.16"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"

 [[package]]
 name = "precomputed-hash"
@@ -1964,9 +1983,9 @@ checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"

 [[package]]
 name = "predicates"
-version = "2.1.1"
+version = "2.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5aab5be6e4732b473071984b3164dbbfb7a3674d30ea5ff44410b6bcd960c3c"
+checksum = "ab68289ded120dcbf9d571afcf70163233229052aec9b08ab09532f698d0e1e6"
 dependencies = [
 "difflib",
 "itertools",
@@ -1975,15 +1994,15 @@ dependencies = [

 [[package]]
 name = "predicates-core"
-version = "1.0.3"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da1c2388b1513e1b605fcec39a95e0a9e8ef088f71443ef37099fa9ae6673fcb"
+checksum = "a6e7125585d872860e9955ca571650b27a4979c5823084168c5ed5bbfb016b56"

 [[package]]
 name = "predicates-tree"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d86de6de25020a36c6d3643a86d9a6a9f552107c0559c60ea03551b5e16c032"
+checksum = "ad3f7fa8d61e139cbc7c3edfebf3b6678883a53f5ffac65d1259329a93ee43a5"
 dependencies = [
 "predicates-core",
 "termtree",
@@ -2015,9 +2034,9 @@ dependencies = [

 [[package]]
 name = "proc-macro2"
-version = "1.0.46"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94e2ef8dbfc347b10c094890f778ee2e36ca9bb4262e86dc99cd217e35f3470b"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
 dependencies = [
 "unicode-ident",
 ]
@@ -2097,7 +2116,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom 0.2.7",
+ "getrandom 0.2.8",
 ]

 [[package]]
@@ -2157,16 +2176,16 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
 dependencies = [
- "getrandom 0.2.7",
+ "getrandom 0.2.8",
 "redox_syscall",
 "thiserror",
 ]

 [[package]]
 name = "regex"
-version = "1.6.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b"
+checksum = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"
 dependencies = [
 "aho-corasick",
 "memchr",
@@ -2181,9 +2200,9 @@ checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"

 [[package]]
 name = "regex-syntax"
-version = "0.6.27"
+version = "0.6.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
+checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"

 [[package]]
 name = "remove_dir_all"
@@ -2221,14 +2240,15 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.103"
+version = "0.0.113"
 dependencies = [
 "anyhow",
 "assert_cmd",
 "bincode",
+ "bitflags",
 "cacache",
 "chrono",
- "clap 4.0.15",
+ "clap 4.0.22",
 "clearscreen",
 "colored",
 "common-path",
@@ -2236,12 +2256,13 @@ dependencies = [
 "dirs 4.0.0",
 "fern",
 "filetime",
- "getrandom 0.2.7",
+ "getrandom 0.2.8",
 "glob",
 "insta",
 "itertools",
 "libcst",
 "log",
+ "nohash-hasher",
 "notify",
 "num-bigint",
 "once_cell",
@@ -2257,7 +2278,7 @@ dependencies = [
 "strum",
 "strum_macros",
 "test-case",
- "textwrap 0.15.1",
+ "textwrap",
 "titlecase",
 "toml",
 "update-informer",
@@ -2266,12 +2287,13 @@ dependencies = [

 [[package]]
 name = "ruff_dev"
-version = "0.0.103"
+version = "0.0.113"
 dependencies = [
 "anyhow",
- "clap 4.0.15",
+ "clap 4.0.22",
 "codegen",
 "itertools",
+ "libcst",
 "ruff",
 "rustpython-ast",
 "rustpython-common",
@@ -2282,9 +2304,9 @@ dependencies = [

 [[package]]
 name = "rustls"
-version = "0.20.6"
+version = "0.20.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5aab8ee6c7097ed6057f43c187a62418d0c05a4bd5f18b3571db50ee0f9ce033"
+checksum = "539a2bfe908f471bfa933876bd1eb6a19cf2176d375f82ef7f99530a40e48c2c"
 dependencies = [
 "log",
 "ring",
@@ -2295,7 +2317,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -2305,7 +2327,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -2328,11 +2350,11 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "bincode",
 "bitflags",
- "bstr",
+ "bstr 0.2.17",
 "itertools",
 "lz4_flex",
 "num-bigint",
@@ -2345,7 +2367,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "ahash",
 "anyhow",
@@ -2417,18 +2439,18 @@ checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"

 [[package]]
 name = "serde"
-version = "1.0.145"
+version = "1.0.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "728eb6351430bccb993660dfffc5a72f91ccc1295abaa8ce19b27ebe4f75568b"
+checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"
 dependencies = [
 "serde_derive",
 ]

 [[package]]
 name = "serde_derive"
-version = "1.0.145"
+version = "1.0.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81fa1584d3d1bcacd84c277a0dfe21f5b0f6accf4a23d04d4c6d61f1af522b4c"
+checksum = "4f1d362ca8fc9c3e3a7484440752472d68a6caa98f1ab81d99b5dfe517cec852"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2437,9 +2459,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.86"
+version = "1.0.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41feea4228a6f1cd09ec7a3593a682276702cd67b5273544757dae23c096f074"
+checksum = "6ce777b7b150d76b9cf60d28b55f5847135a003f7d7350c6be7a773508ce7d45"
 dependencies = [
 "itoa",
 "ryu",
@@ -2634,9 +2656,9 @@ dependencies = [

 [[package]]
 name = "syn"
-version = "1.0.102"
+version = "1.0.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fcd952facd492f9be3ef0d0b7032a6e442ee9b361d4acc2b1d0c4aaa5f613a1"
+checksum = "a864042229133ada95abf3b54fdc62ef5ccabe9515b64717bcb9a1919e59445d"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2702,9 +2724,9 @@ dependencies = [

 [[package]]
 name = "termtree"
-version = "0.2.4"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "507e9898683b6c43a9aa55b64259b721b52ba226e0f3779137e50ad114a4c90b"
+checksum = "95059e91184749cb66be6dc994f67f182b6d897cb3df74a5bf66b5e709295fd8"

 [[package]]
 name = "test-case"
@@ -2730,21 +2752,15 @@ dependencies = [

 [[package]]
 name = "textwrap"
-version = "0.15.1"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "949517c0cf1bf4ee812e2e07e08ab448e3ae0d23472aee8a06c985f0c8815b16"
+checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
 dependencies = [
 "smawk",
 "unicode-linebreak",
 "unicode-width",
 ]

-[[package]]
-name = "textwrap"
-version = "0.16.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
-
 [[package]]
 name = "thiserror"
 version = "1.0.37"
@@ -2984,7 +3000,7 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b97acb4c28a254fd7a4aeec976c46a7fa404eac4d7c134b30c75144846d7cb8f"
 dependencies = [
- "base64 0.13.0",
+ "base64 0.13.1",
 "chunked_transfer",
 "flate2",
 "log",
@@ -3240,46 +3256,60 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

 [[package]]
 name = "windows-sys"
-version = "0.36.1"
+version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea04155a16a59f9eab786fe12a4a450e75cdb175f9e0d80da1e17db09f55b8d2"
+checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
 dependencies = [
+ "windows_aarch64_gnullvm",
 "windows_aarch64_msvc",
 "windows_i686_gnu",
 "windows_i686_msvc",
 "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
 "windows_x86_64_msvc",
 ]

 [[package]]
-name = "windows_aarch64_msvc"
-version = "0.36.1"
+name = "windows_aarch64_gnullvm"
+version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
+checksum = "41d2aa71f6f0cbe00ae5167d90ef3cfe66527d6f613ca78ac8024c3ccab9a19e"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd0f252f5a35cac83d6311b2e795981f5ee6e67eb1f9a7f64eb4500fbc4dcdb4"

 [[package]]
 name = "windows_i686_gnu"
-version = "0.36.1"
+version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
+checksum = "fbeae19f6716841636c28d695375df17562ca208b2b7d0dc47635a50ae6c5de7"

 [[package]]
 name = "windows_i686_msvc"
-version = "0.36.1"
+version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
+checksum = "84c12f65daa39dd2babe6e442988fc329d6243fdce47d7d2d155b8d874862246"

 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.36.1"
+version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
+checksum = "bf7b1b21b5362cbc318f686150e5bcea75ecedc74dd157d874d754a2ca44b0ed"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028"

 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.36.1"
+version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
+checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"

 [[package]]
 name = "ws2_32-sys"
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,15 +6,16 @@ members = [

 [package]
 name = "ruff"
-version = "0.0.103"
+version = "0.0.113"
 edition = "2021"

 [lib]
 name = "ruff"

 [dependencies]
-anyhow = { version = "1.0.60" }
+anyhow = { version = "1.0.66" }
 bincode = { version = "1.3.3" }
+bitflags = { version = "1.3.2" }
 chrono = { version = "0.4.21" }
 clap = { version = "4.0.1", features = ["derive"] }
 colored = { version = "2.0.0" }
@@ -24,26 +25,27 @@ fern = { version = "0.6.1" }
 filetime = { version = "0.2.17" }
 glob = { version = "0.3.0" }
 itertools = { version = "0.10.5" }
-libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "32a044c127668df44582f85699358e67803b0d73" }
+libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "a13ec97dd4eb925bde4d426c6e422582793b260c" }
 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" }
-ropey = { version = "1.5.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
-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 }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
+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]
--- a/README.md
+++ b/README.md
@@ -15,21 +15,25 @@ 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.
+
+(Coming from Flake8? Try [`flake8-to-ruff`](https://pypi.org/project/flake8-to-ruff/) to
+automatically convert your existing configuration.)

 Ruff is actively developed and used in major open-source projects
 like [Zulip](https://github.com/zulip/zulip), [pydantic](https://github.com/pydantic/pydantic),
@@ -52,8 +56,10 @@ Read the [launch blog post](https://notes.crmarsh.com/python-tooling-could-be-mu
   8. [flake8-builtins](#flake8-builtins)
   9. [flake8-print](#flake8-print)
   10. [flake8-quotes](#flake8-quotes)
-   11. [Ruff-specific rules](#ruff-specific-rules)
-   12. [Meta rules](#meta-rules)
+   11. [flake8-annotations](#flake8-annotations)
+   12. [flake8-2020](#flake8-2020)
+   13. [Ruff-specific rules](#ruff-specific-rules)
+   14. [Meta rules](#meta-rules)
 5. [Editor Integrations](#editor-integrations)
 6. [FAQ](#faq)
 7. [Development](#development)
@@ -93,7 +99,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.103
+    rev: v0.0.113
    hooks:
      - id: ruff
 ```
@@ -199,7 +205,7 @@ Options:
          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
@@ -281,16 +287,16 @@ 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

@@ -300,7 +306,7 @@ By default, Ruff enables all `E` and `F` error codes, which correspond to those

 The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` command-line option.

-<!-- Sections automatically generated by examples/generate_rules_table.rs. -->
+<!-- Sections automatically generated by `cargo dev generate-rules-table`. -->
 <!-- Begin auto-generated sections. -->

 ### Pyflakes
@@ -322,7 +328,7 @@ For more, see [Pyflakes](https://pypi.org/project/pyflakes/2.5.0/) on PyPI.
 | 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 |  |
@@ -361,6 +367,14 @@ For more, see [pycodestyle](https://pypi.org/project/pycodestyle/2.9.1/) on PyPI
 | 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.
@@ -426,6 +440,9 @@ For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
 | 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 | Unnessary __future__ import `...` for target Python version |  |
+| U011 | UnnecessaryLRUCacheParams | Unnessary parameters to functools.lru_cache | 🛠 |

 ### pep8-naming

@@ -459,7 +476,7 @@ For more, see [flake8-comprehensions](https://pypi.org/project/flake8-comprehens
 | 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) |  |
+| 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) | 🛠 |
@@ -480,9 +497,13 @@ For more, see [flake8-bugbear](https://pypi.org/project/flake8-bugbear/22.10.27/
 | ---- | ---- | ------- | --- |
 | 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 calls 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,):`. |  |
 | B014 | DuplicateHandlerException | Exception handler with duplicate exception: `ValueError` | 🛠 |
@@ -491,6 +512,7 @@ For more, see [flake8-bugbear](https://pypi.org/project/flake8-bugbear/22.10.27/
 | B017 | NoAssertRaisesException | `assertRaises(Exception):` should be considered evil. |  |
 | B018 | UselessExpression | Found useless expression. Either assign it to a variable or remove it. |  |
 | B025 | DuplicateTryBlockException | try-except block with duplicate exception `Exception` |  |
+| B026 | StarArgUnpackingAfterKeywordArg | Star-arg unpacking after a keyword argument is strongly discouraged. |  |

 ### flake8-builtins

@@ -522,12 +544,48 @@ For more, see [flake8-quotes](https://pypi.org/project/flake8-quotes/3.3.1/) on
 | 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` |  |
+
 ### 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'?) |  |

 ### Meta rules

@@ -539,6 +597,10 @@ For more, see [flake8-quotes](https://pypi.org/project/flake8-quotes/3.3.1/) on

 ## 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)
@@ -551,6 +613,19 @@ 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.
+
+Ruff can also be integrated via [efm](https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md#efm)
+in just a [few lines](https://github.com/JafarAbdi/myconfigs/blob/6f0b6b2450e92ec8fc50422928cd22005b919110/efm-langserver/config.yaml#L14-L20).
+
+### 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:
@@ -587,6 +662,9 @@ 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.

@@ -604,9 +682,11 @@ including:
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
+- [`flake8-annotations`](https://pypi.org/project/flake8-annotations/)
 - [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (15/32)
- [`pyupgrade`](https://pypi.org/project/pyupgrade/) (10/34)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (20/32)
+- [`flake8-2020`](https://pypi.org/project/flake8-2020/)
+- [`pyupgrade`](https://pypi.org/project/pyupgrade/) (14/34)
 - [`autoflake`](https://pypi.org/project/autoflake/) (1/7)

 Beyond rule-set parity, Ruff suffers from the following limitations vis-à-vis Flake8:
@@ -626,11 +706,13 @@ Today, Ruff can be used to replace Flake8 when used with any of the following pl
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
+- [`flake8-annotations`](https://pypi.org/project/flake8-annotations/)
 - [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (15/32)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (20/32)
+- [`flake8-2020`](https://pypi.org/project/flake8-2020/)

-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/) (10/34).
+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/) (14/34).

 If you're looking to use Ruff, but rely on an unsupported Flake8 plugin, free to file an Issue.

@@ -650,6 +732,34 @@ 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 equivalent to `isort` when used `profile = "black"`, and a
+few other settings (`combine_as_imports = true`, `order_by_type = false`, and
+`case_sensitive` = true`).
+
+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
+    "I"
+]
+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
--- a/flake8_to_ruff/Cargo.lock
+++ b/flake8_to_ruff/Cargo.lock
@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.103"
+version = "0.0.113"
 dependencies = [
 "anyhow",
 "clap",
@@ -1265,7 +1265,7 @@ checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"
 [[package]]
 name = "libcst"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/LibCST?rev=32a044c127668df44582f85699358e67803b0d73#32a044c127668df44582f85699358e67803b0d73"
+source = "git+https://github.com/charliermarsh/LibCST?rev=a13ec97dd4eb925bde4d426c6e422582793b260c#a13ec97dd4eb925bde4d426c6e422582793b260c"
 dependencies = [
 "chic",
 "itertools",
@@ -1280,7 +1280,7 @@ dependencies = [
 [[package]]
 name = "libcst_derive"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/LibCST?rev=32a044c127668df44582f85699358e67803b0d73#32a044c127668df44582f85699358e67803b0d73"
+source = "git+https://github.com/charliermarsh/LibCST?rev=a13ec97dd4eb925bde4d426c6e422582793b260c#a13ec97dd4eb925bde4d426c6e422582793b260c"
 dependencies = [
 "quote",
 "syn",
@@ -1505,7 +1505,7 @@ dependencies = [

 [[package]]
 name = "num_cpus"
-version = "1.13.1"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
 dependencies = [
@@ -1975,7 +1975,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.103"
+version = "0.0.113"
 dependencies = [
 "anyhow",
 "bincode",
@@ -2028,7 +2028,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -2038,7 +2038,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -2061,7 +2061,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "bincode",
 "bitflags",
@@ -2078,7 +2078,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
+source = "git+https://github.com/RustPython/RustPython.git?rev=27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb#27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb"
 dependencies = [
 "ahash",
 "anyhow",
--- a/flake8_to_ruff/Cargo.toml
+++ b/flake8_to_ruff/Cargo.toml
@@ -1,20 +1,20 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.103-dev.0"
+version = "0.0.113-dev.0"
 edition = "2021"

 [lib]
 name = "flake8_to_ruff"

 [dependencies]
-anyhow = { version = "1.0.60" }
+anyhow = { version = "1.0.66" }
 clap = { version = "4.0.1", features = ["derive"] }
 configparser = { version = "3.0.2" }
-once_cell = { version = "1.13.1" }
+once_cell = { version = "1.16.0" }
 regex = { version = "1.6.0" }
 ruff = { path = "..", default-features = false }
-serde = { version = "1.0.143", features = ["derive"] }
-serde_json = { version = "1.0.83" }
+serde = { version = "1.0.147", features = ["derive"] }
+serde_json = { version = "1.0.87" }
 toml = { version = "0.5.9" }

 [dev-dependencies]
--- a/flake8_to_ruff/src/converter.rs
+++ b/flake8_to_ruff/src/converter.rs
@@ -1,10 +1,11 @@
 use std::collections::{BTreeSet, HashMap};

 use anyhow::Result;
+use ruff::checks_gen::CheckCodePrefix;
 use ruff::flake8_quotes::settings::Quote;
 use ruff::settings::options::Options;
 use ruff::settings::pyproject::Pyproject;
-use ruff::{flake8_quotes, pep8_naming};
+use ruff::{flake8_annotations, flake8_quotes, pep8_naming};

 use crate::plugin::Plugin;
 use crate::{parser, plugin};
@@ -13,6 +14,29 @@ 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> = Default::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
@@ -25,7 +49,12 @@ pub fn convert(
        .unwrap_or_else(|| {
            plugin::resolve_select(
                flake8,
-                &plugins.unwrap_or_else(|| plugin::infer_plugins(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
@@ -39,6 +68,7 @@ pub fn convert(

    // Parse each supported option.
    let mut options: Options = Default::default();
+    let mut flake8_annotations: flake8_annotations::settings::Options = Default::default();
    let mut flake8_quotes: flake8_quotes::settings::Options = Default::default();
    let mut pep8_naming: pep8_naming::settings::Options = Default::default();
    for (key, value) in flake8 {
@@ -51,6 +81,7 @@ pub fn convert(
                },
                "select" => {
                    // No-op (handled above).
+                    select.extend(parser::parse_prefix_codes(value.as_ref()));
                }
                "ignore" => {
                    // No-op (handled above).
@@ -78,6 +109,31 @@ pub fn convert(
                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
                    }
                }
+                // 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),
@@ -94,10 +150,9 @@ pub fn convert(
                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Single),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
-                "avoid-escape" | "avoid_escape" => match value.trim() {
-                    "true" => flake8_quotes.avoid_escape = Some(true),
-                    "false" => flake8_quotes.avoid_escape = Some(false),
-                    _ => 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" => {
@@ -153,6 +208,8 @@ mod tests {
        let actual = convert(&HashMap::from([]), None)?;
        let expected = Pyproject::new(Options {
            line_length: None,
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -166,7 +223,9 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: None,
            flake8_quotes: None,
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
@@ -182,6 +241,8 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            line_length: Some(100),
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -195,7 +256,9 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: None,
            flake8_quotes: None,
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
@@ -211,6 +274,8 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            line_length: Some(100),
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -224,7 +289,9 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: None,
            flake8_quotes: None,
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
@@ -240,6 +307,8 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            line_length: None,
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -253,7 +322,9 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: None,
            flake8_quotes: None,
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
@@ -269,6 +340,8 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            line_length: None,
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -282,12 +355,14 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: 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,
            }),
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
@@ -306,6 +381,8 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            line_length: None,
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -354,7 +431,9 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: None,
            flake8_quotes: None,
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
@@ -370,6 +449,8 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            line_length: None,
+            src: None,
+            fix: None,
            exclude: None,
            extend_exclude: None,
            select: Some(vec![
@@ -384,12 +465,14 @@ mod tests {
            per_file_ignores: None,
            dummy_variable_rgx: None,
            target_version: None,
+            flake8_annotations: 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,
            }),
+            isort: None,
            pep8_naming: None,
        });
        assert_eq!(actual, expected);
--- a/flake8_to_ruff/src/parser.rs
+++ b/flake8_to_ruff/src/parser.rs
@@ -37,6 +37,15 @@ pub fn parse_strings(value: &str) -> Vec<String> {
        .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,
--- a/flake8_to_ruff/src/plugin.rs
+++ b/flake8_to_ruff/src/plugin.rs
@@ -12,6 +12,7 @@ pub enum Plugin {
    Flake8Docstrings,
    Flake8Print,
    Flake8Quotes,
+    Flake8Annotations,
    PEP8Naming,
    Pyupgrade,
 }
@@ -27,6 +28,7 @@ impl FromStr for Plugin {
            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
            "flake8-print" => Ok(Plugin::Flake8Print),
            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
+            "flake8-annotations" => Ok(Plugin::Flake8Annotations),
            "pep8-naming" => Ok(Plugin::PEP8Naming),
            "pyupgrade" => Ok(Plugin::Pyupgrade),
            _ => Err(anyhow!("Unknown plugin: {}", string)),
@@ -35,6 +37,20 @@ impl FromStr for Plugin {
 }

 impl Plugin {
+    pub fn default(&self) -> CheckCodePrefix {
+        match self {
+            Plugin::Flake8Bugbear => CheckCodePrefix::B,
+            Plugin::Flake8Builtins => CheckCodePrefix::A,
+            Plugin::Flake8Comprehensions => CheckCodePrefix::C,
+            Plugin::Flake8Docstrings => CheckCodePrefix::D,
+            Plugin::Flake8Print => CheckCodePrefix::T,
+            Plugin::Flake8Quotes => CheckCodePrefix::Q,
+            Plugin::Flake8Annotations => CheckCodePrefix::ANN,
+            Plugin::PEP8Naming => CheckCodePrefix::N,
+            Plugin::Pyupgrade => CheckCodePrefix::U,
+        }
+    }
+
    pub fn select(&self, flake8: &HashMap<String, Option<String>>) -> Vec<CheckCodePrefix> {
        match self {
            Plugin::Flake8Bugbear => vec![CheckCodePrefix::B],
@@ -58,6 +74,7 @@ impl Plugin {
            }
            Plugin::Flake8Print => vec![CheckCodePrefix::T],
            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
+            Plugin::Flake8Annotations => vec![CheckCodePrefix::ANN],
            Plugin::PEP8Naming => vec![CheckCodePrefix::N],
            Plugin::Pyupgrade => vec![CheckCodePrefix::U],
        }
@@ -236,8 +253,11 @@ impl DocstringConvention {
    }
 }

-/// Infer the enabled plugins based on user-provided settings.
-pub fn infer_plugins(flake8: &HashMap<String, Option<String>>) -> Vec<Plugin> {
+/// 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() {
@@ -262,6 +282,31 @@ pub fn infer_plugins(flake8: &HashMap<String, Option<String>>) -> Vec<Plugin> {
            "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);
+            }
            // pep8-naming
            "ignore-names" | "ignore_names" => {
                plugins.insert(Plugin::PEP8Naming);
@@ -278,6 +323,38 @@ pub fn infer_plugins(flake8: &HashMap<String, Option<String>>) -> Vec<Plugin> {
    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::Flake8Bugbear,
+        Plugin::Flake8Builtins,
+        Plugin::Flake8Comprehensions,
+        Plugin::Flake8Docstrings,
+        Plugin::Flake8Print,
+        Plugin::Flake8Quotes,
+        Plugin::Flake8Annotations,
+        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>>,
@@ -288,9 +365,7 @@ pub fn resolve_select(

    // Add prefix codes for every plugin.
    for plugin in plugins {
-        for prefix in plugin.select(flake8) {
-            select.insert(prefix);
-        }
+        select.extend(plugin.select(flake8));
    }

    select
@@ -300,18 +375,18 @@ pub fn resolve_select(
 mod tests {
    use std::collections::HashMap;

-    use crate::plugin::{infer_plugins, Plugin};
+    use crate::plugin::{infer_plugins_from_options, Plugin};

    #[test]
    fn it_infers_plugins() {
-        let actual = infer_plugins(&HashMap::from([(
+        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(&HashMap::from([(
+        let actual = infer_plugins_from_options(&HashMap::from([(
            "staticmethod-decorators".to_string(),
            Some("[]".to_string()),
        )]));
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,3 +32,7 @@ build-backend = "maturin"
 bindings = "bin"
 sdist-include = ["Cargo.lock"]
 strip = true
+
+[tool.isort]
+profile = "black"
+known_third_party = ["fastapi", "pydantic", "starlette"]
--- a/resources/test/fixtures/B004.py
+++ b/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.")
--- a/resources/test/fixtures/B005.py
+++ b/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
--- a/resources/test/fixtures/B009_B010.py
+++ b/resources/test/fixtures/B009_B010.py
@@ -0,0 +1,36 @@
+"""
+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)
--- a/resources/test/fixtures/B015.py
+++ b/resources/test/fixtures/B015.py
@@ -22,3 +22,6 @@ data = [x for x in [1, 2, 3] if x in (1, 2)]

 class TestClass:
    1 == 1
+
+
+print(1 == 1)
--- a/resources/test/fixtures/B026.py
+++ b/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"])
--- a/resources/test/fixtures/C413.py
+++ b/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))
--- a/resources/test/fixtures/F632.py
+++ b/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
--- a/resources/test/fixtures/N803.py
+++ b/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
--- a/resources/test/fixtures/N804.py
+++ b/resources/test/fixtures/N804.py
@@ -1,19 +1,43 @@
+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):
+        ...
+
+
+class MetaClass(ABCMeta):
+    def bad_method(self):
+        pass
+
+    def good_method(cls):
+        pass
+

 def func(x):
    return x
--- a/resources/test/fixtures/N805.py
+++ b/resources/test/fixtures/N805.py
@@ -1,11 +1,11 @@
-import random
+from abc import ABCMeta


 class Class:
    def bad_method(this):
        pass

-    if random.random(0, 2) == 0:
+    if False:

        def extra_bad_method(this):
            pass
@@ -21,6 +21,23 @@ class Class:
    def static_method(x):
        return x

+    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
--- a/resources/test/fixtures/RUF001.py
+++ b/resources/test/fixtures/RUF001.py
@@ -2,5 +2,6 @@ x = "𝐁ad string"


 def f():
-    """Here's a comment with an unusual parenthesis: ）"""
+    """Here's a docstring with an unusual parenthesis: ）"""
+    # And here's a comment with an unusual punctuation mark: ᜵
    ...
--- a/resources/test/fixtures/RUF002.py
+++ b/resources/test/fixtures/RUF002.py
@@ -2,5 +2,6 @@ x = "𝐁ad string"


 def f():
-    """Here's a comment with an unusual parenthesis: ）"""
+    """Here's a docstring with an unusual parenthesis: ）"""
+    # And here's a comment with an unusual punctuation mark: ᜵
    ...
--- a/resources/test/fixtures/RUF003.py
+++ b/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: ᜵
+    ...
--- a/resources/test/fixtures/U009_0.py
+++ b/resources/test/fixtures/U009_0.py
@@ -0,0 +1,3 @@
+# coding=utf8
+
+print('Hello world')
--- a/resources/test/fixtures/U009_1.py
+++ b/resources/test/fixtures/U009_1.py
@@ -0,0 +1,4 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+print('Hello world')
--- a/resources/test/fixtures/U009_2.py
+++ b/resources/test/fixtures/U009_2.py
@@ -0,0 +1,5 @@
+#!/usr/bin/python
+# A coding comment is only valid in the first two lines, so this one is not checked.
+# -*- coding: utf-8 -*-
+
+print('Hello world')
--- a/resources/test/fixtures/U009_3.py
+++ b/resources/test/fixtures/U009_3.py
@@ -0,0 +1,4 @@
+#!/usr/bin/python
+# -*- coding: something-else -*-
+
+print('Hello world')
--- a/resources/test/fixtures/U010.py
+++ b/resources/test/fixtures/U010.py
@@ -0,0 +1,5 @@
+from __future__ import annotations, nested_scopes, generators
+
+from __future__ import absolute_import, division
+
+from __future__ import generator_stop
--- a/resources/test/fixtures/U011_0.py
+++ b/resources/test/fixtures/U011_0.py
@@ -0,0 +1,103 @@
+import functools
+from functools import lru_cache
+
+
+@lru_cache()
+def fixme1():
+    pass
+
+
+@other_deco_after
+@functools.lru_cache()
+def fixme2():
+    pass
+
+
+@lru_cache(maxsize=None)
+def fixme3():
+    pass
+
+
+@functools.lru_cache(maxsize=None)
+@other_deco_before
+def fixme4():
+    pass
+
+
+@lru_cache( # A 
+) # B
+def fixme5():
+    pass
+
+
+@lru_cache(
+    # A
+)   # B
+def fixme6():
+    pass
+
+
+@functools.lru_cache(
+    # A
+    maxsize = None) # B
+def fixme7():
+    pass
+
+
+@functools.lru_cache(
+    # A1
+    maxsize = None
+    # A2
+) # B
+def fixme8():
+    pass
+
+
+@functools.lru_cache(
+    # A1
+    maxsize = 
+    None
+    # A2
+
+)
+def fixme9():
+    pass
+
+
+@functools.lru_cache(
+    # A1
+    maxsize = 
+    None
+    # A2
+)
+def fixme10():
+    pass
+
+
+@lru_cache
+def correct1():
+    pass
+
+
+@functools.lru_cache
+def correct2():
+    pass
+
+
+@functoools.lru_cache(maxsize=64)
+def correct3():
+    pass
+
+
+def user_func():
+    pass
+
+
+@lru_cache(user_func)
+def correct4():
+    pass
+
+
+@lru_cache(user_func, maxsize=None)
+def correct5():
+    pass
--- a/resources/test/fixtures/U011_1.py
+++ b/resources/test/fixtures/U011_1.py
@@ -0,0 +1,15 @@
+import functools
+
+
+def lru_cache(maxsize=None):
+    pass
+
+
+@lru_cache()
+def dont_fixme():
+    pass
+
+
+@lru_cache(maxsize=None)
+def dont_fixme():
+    pass
--- a/resources/test/fixtures/YTT101.py
+++ b/resources/test/fixtures/YTT101.py
@@ -0,0 +1,13 @@
+import sys
+from sys import version, version as v
+
+print(sys.version)
+
+print(sys.version[:3])
+print(version[:3])
+
+# ignore from imports with aliases, patches welcome
+print(v[:3])
+# the tool is timid and only flags certain numeric slices
+i = 3
+print(sys.version[:i])
--- a/resources/test/fixtures/YTT102.py
+++ b/resources/test/fixtures/YTT102.py
@@ -0,0 +1,5 @@
+import sys
+from sys import version
+
+py_minor = sys.version[2]
+py_minor = version[2]
--- a/resources/test/fixtures/YTT103.py
+++ b/resources/test/fixtures/YTT103.py
@@ -0,0 +1,8 @@
+import sys
+from sys import version
+
+version < "3.5"
+sys.version < "3.5"
+sys.version <= "3.5"
+sys.version > "3.5"
+sys.version >= "3.5"
--- a/resources/test/fixtures/YTT201.py
+++ b/resources/test/fixtures/YTT201.py
@@ -0,0 +1,10 @@
+import sys
+from sys import version_info
+
+print("{}.{}".format(*sys.version_info))
+PY3 = sys.version_info[0] >= 3
+
+PY3 = sys.version_info[0] == 3
+PY3 = version_info[0] == 3
+PY2 = sys.version_info[0] != 3
+PY2 = version_info[0] != 3
--- a/resources/test/fixtures/YTT202.py
+++ b/resources/test/fixtures/YTT202.py
@@ -0,0 +1,7 @@
+import six
+from six import PY3
+
+if six.PY3:
+    print("3")
+if PY3:
+    print("3")
--- a/resources/test/fixtures/YTT203.py
+++ b/resources/test/fixtures/YTT203.py
@@ -0,0 +1,5 @@
+import sys
+from sys import version_info
+
+sys.version_info[1] >= 5
+version_info[1] < 6
--- a/resources/test/fixtures/YTT204.py
+++ b/resources/test/fixtures/YTT204.py
@@ -0,0 +1,5 @@
+import sys
+from sys import version_info
+
+sys.version_info.minor <= 7
+version_info.minor > 8
--- a/resources/test/fixtures/YTT301.py
+++ b/resources/test/fixtures/YTT301.py
@@ -0,0 +1,5 @@
+import sys
+from sys import version
+
+py_major = sys.version[0]
+py_major = version[0]
--- a/resources/test/fixtures/YTT302.py
+++ b/resources/test/fixtures/YTT302.py
@@ -0,0 +1,8 @@
+import sys
+from sys import version
+
+version < "3"
+sys.version < "3"
+sys.version <= "3"
+sys.version > "3"
+sys.version >= "3"
--- a/resources/test/fixtures/YTT303.py
+++ b/resources/test/fixtures/YTT303.py
@@ -0,0 +1,5 @@
+import sys
+from sys import version
+
+print(sys.version[:1])
+print(version[:1])
--- a/resources/test/fixtures/excluded.py
+++ b/resources/test/fixtures/excluded.py
@@ -1,9 +0,0 @@
-a = "abc"
-b = f"ghi{'jkl'}"
-
-c = f"def"
-d = f"def" + "ghi"
-e = (
-    f"def" +
-    "ghi"
-)
--- a/resources/test/fixtures/bar/migrations/migration.py
+++ b/resources/test/fixtures/bar/migrations/migration.py
--- a/resources/test/fixtures/flake8_annotations/allow_star_arg_any.py
+++ b/resources/test/fixtures/flake8_annotations/allow_star_arg_any.py
@@ -0,0 +1,57 @@
+from typing import Any
+
+
+# OK
+def foo(a: int, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: Any, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: str) -> Any:
+    pass
+
+
+# OK
+def foo(a: int, *args: Any, **kwargs: Any) -> int:
+    pass
+
+
+# OK
+def foo(a: int, *args: Any, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: Any) -> int:
+    pass
+
+
+class Bar:
+    # OK
+    def foo_method(self, a: int, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo_method(self, a: Any, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo_method(self, a: int, *params: str, **options: str) -> Any:
+        pass
+
+    # OK
+    def foo_method(self, a: int, *params: Any, **options: Any) -> int:
+        pass
+
+    # OK
+    def foo_method(self, a: int, *params: Any, **options: str) -> int:
+        pass
+
+    # OK
+    def foo_method(self, a: int, *params: str, **options: Any) -> int:
+        pass
--- a/resources/test/fixtures/flake8_annotations/annotation_presence.py
+++ b/resources/test/fixtures/flake8_annotations/annotation_presence.py
@@ -0,0 +1,105 @@
+from typing import Any, Type
+
+# Error
+def foo(a, b):
+    pass
+
+
+# Error
+def foo(a: int, b):
+    pass
+
+
+# Error
+def foo(a: int, b) -> int:
+    pass
+
+
+# Error
+def foo(a: int, b: int):
+    pass
+
+
+# Error
+def foo():
+    pass
+
+
+# OK
+def foo(a: int, b: int) -> int:
+    pass
+
+
+# OK
+def foo() -> int:
+    pass
+
+
+# OK
+def foo(a: int, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: Any, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: str) -> Any:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: Any, **kwargs: Any) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: Any, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: Any) -> int:
+    pass
+
+
+class Foo:
+    # OK
+    def foo(self: "Foo", a: int, b: int) -> int:
+        pass
+
+    # ANN101
+    def foo(self, a: int, b: int) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: Any, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: str, **options: str) -> Any:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: Any, **options: Any) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: Any, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: str, **options: Any) -> int:
+        pass
+
+    # OK
+    @classmethod
+    def foo(cls: Type["Foo"], a: int, b: int) -> int:
+        pass
+
+    # ANN102
+    @classmethod
+    def foo(cls, a: int, b: int) -> int:
+        pass
--- a/resources/test/fixtures/flake8_annotations/mypy_init_return.py
+++ b/resources/test/fixtures/flake8_annotations/mypy_init_return.py
@@ -0,0 +1,41 @@
+"""Test case expected to be run with `mypy_init_return = True`."""
+
+# Error
+class Foo:
+    def __init__(self):
+        ...
+
+
+# Error
+class Foo:
+    def __init__(self, foo):
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self, foo) -> None:
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self) -> None:
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self, foo: int):
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self, foo: int) -> None:
+        ...
+
+
+# Error
+def __init__(self, foo: int):
+    ...
--- a/resources/test/fixtures/flake8_annotations/suppress_dummy_args.py
+++ b/resources/test/fixtures/flake8_annotations/suppress_dummy_args.py
@@ -0,0 +1,26 @@
+"""Test case expected to be run with `suppress_dummy_args = True`."""
+
+# OK
+def foo(_) -> None:
+    ...
+
+
+# OK
+def foo(*_) -> None:
+    ...
+
+
+# OK
+def foo(**_) -> None:
+    ...
+
+
+# OK
+def foo(a: int, _) -> None:
+    ...
+
+
+# OK
+def foo() -> None:
+    def bar(_) -> None:
+        ...
--- a/resources/test/fixtures/flake8_annotations/suppress_none_returning.py
+++ b/resources/test/fixtures/flake8_annotations/suppress_none_returning.py
@@ -0,0 +1,55 @@
+"""Test case expected to be run with `suppress_none_returning = True`."""
+
+# OK
+def foo():
+    a = 2 + 2
+
+
+# OK
+def foo():
+    return
+
+
+# OK
+def foo():
+    return None
+
+
+# OK
+def foo():
+    a = 2 + 2
+    if a == 4:
+        return
+    else:
+        return
+
+
+# OK
+def foo():
+    a = 2 + 2
+    if a == 4:
+        return None
+    else:
+        return
+
+
+# OK
+def foo():
+    def bar() -> bool:
+        return True
+
+    bar()
+
+
+# Error
+def foo():
+    return True
+
+
+# Error
+def foo():
+    a = 2 + 2
+    if a == 4:
+        return True
+    else:
+        return
--- a/resources/test/fixtures/foo/migrations/init.py
+++ b/resources/test/fixtures/foo/migrations/init.py
--- a/resources/test/fixtures/isort/combine_import_froms.py
+++ b/resources/test/fixtures/isort/combine_import_froms.py
@@ -0,0 +1,5 @@
+from collections import Awaitable
+from collections import AsyncIterable
+from collections import Collection
+from collections import ChainMap
+from collections import MutableSequence, MutableMapping
--- a/resources/test/fixtures/isort/deduplicate_imports.py
+++ b/resources/test/fixtures/isort/deduplicate_imports.py
@@ -0,0 +1,4 @@
+import os
+import os
+import os as os1
+import os as os2
--- a/resources/test/fixtures/isort/fit_line_length.py
+++ b/resources/test/fixtures/isort/fit_line_length.py
@@ -0,0 +1 @@
+from collections import Collection
--- a/resources/test/fixtures/isort/import_from_after_import.py
+++ b/resources/test/fixtures/isort/import_from_after_import.py
@@ -0,0 +1,2 @@
+from collections import Collection
+import os
--- a/resources/test/fixtures/isort/leading_prefix.py
+++ b/resources/test/fixtures/isort/leading_prefix.py
@@ -0,0 +1,6 @@
+x = 1; import sys
+import os
+
+if True:
+    x = 1; import sys
+    import os
--- a/resources/test/fixtures/isort/no_reorder_within_section.py
+++ b/resources/test/fixtures/isort/no_reorder_within_section.py
@@ -0,0 +1,3 @@
+# OK
+import os
+import sys
--- a/resources/test/fixtures/isort/order_by_type.py
+++ b/resources/test/fixtures/isort/order_by_type.py
@@ -0,0 +1,12 @@
+import StringIO
+import glob
+import os
+import shutil
+import tempfile
+import time
+from subprocess import PIPE, Popen, STDOUT
+from module import Class, CONSTANT, function, BASIC, Apple
+import foo
+import FOO
+import BAR
+import bar
--- a/resources/test/fixtures/isort/preserve_indentation.py
+++ b/resources/test/fixtures/isort/preserve_indentation.py
@@ -0,0 +1,6 @@
+if True:
+    import sys
+    import os
+else:
+    import sys
+    import os
--- a/resources/test/fixtures/isort/pyproject.toml
+++ b/resources/test/fixtures/isort/pyproject.toml
@@ -0,0 +1,2 @@
+[tool.ruff]
+line-length = 88
--- a/resources/test/fixtures/isort/reorder_within_section.py
+++ b/resources/test/fixtures/isort/reorder_within_section.py
@@ -0,0 +1,2 @@
+import sys
+import os
--- a/resources/test/fixtures/isort/separate_first_party_imports.py
+++ b/resources/test/fixtures/isort/separate_first_party_imports.py
@@ -0,0 +1,5 @@
+import sys
+import leading_prefix
+import numpy as np
+import os
+from leading_prefix import Class
--- a/resources/test/fixtures/isort/separate_future_imports.py
+++ b/resources/test/fixtures/isort/separate_future_imports.py
@@ -0,0 +1,3 @@
+import sys
+import os
+from __future__ import annotations
--- a/resources/test/fixtures/isort/separate_local_folder_imports.py
+++ b/resources/test/fixtures/isort/separate_local_folder_imports.py
@@ -0,0 +1,4 @@
+import sys
+import leading_prefix
+import os
+from . import leading_prefix
--- a/resources/test/fixtures/isort/separate_third_party_imports.py
+++ b/resources/test/fixtures/isort/separate_third_party_imports.py
@@ -0,0 +1,4 @@
+import pandas as pd
+import sys
+import numpy as np
+import os
--- a/resources/test/fixtures/isort/skip.py
+++ b/resources/test/fixtures/isort/skip.py
@@ -0,0 +1,10 @@
+# isort: off
+import sys
+import os
+import collections
+# isort: on
+
+import sys
+import os  # isort: skip
+import collections
+import abc
--- a/resources/test/fixtures/isort/trailing_suffix.py
+++ b/resources/test/fixtures/isort/trailing_suffix.py
@@ -0,0 +1,6 @@
+import sys
+import os; x = 1
+
+if True:
+    import sys
+    import os; x = 1
--- a/resources/test/fixtures/pyproject.toml
+++ b/resources/test/fixtures/pyproject.toml
@@ -1,9 +1,9 @@
 [tool.ruff]
 line-length = 88
 extend-exclude = [
-  "excluded.py",
+  "excluded_file.py",
  "migrations",
-  "directory/also_excluded.py",
+  "with_excluded_file/other_excluded_file.py",
 ]
 per-file-ignores = { "__init__.py" = ["F401"] }

--- a/resources/test/fixtures/with_excluded_file/other_excluded_file.py
+++ b/resources/test/fixtures/with_excluded_file/other_excluded_file.py
--- a/resources/test/fixtures/with_excluded_mdirectory/init.py
+++ b/resources/test/fixtures/with_excluded_mdirectory/init.py
--- a/resources/test/fixtures/with_excluded_mdirectory/migrations/init.py
+++ b/resources/test/fixtures/with_excluded_mdirectory/migrations/init.py
--- a/resources/test/fixtures/with_excluded_mdirectory/migrations/migration.py
+++ b/resources/test/fixtures/with_excluded_mdirectory/migrations/migration.py
--- a/resources/test/fixtures/foo/init.py
+++ b/resources/test/fixtures/foo/init.py
--- a/ruff/main.py
+++ b/ruff/main.py
@@ -0,0 +1,7 @@
+import os
+import sys
+import sysconfig
+
+if __name__ == "__main__":
+    ruff = os.path.join(sysconfig.get_path("scripts"), "ruff")
+    os.spawnv(os.P_WAIT, ruff, [ruff, *sys.argv[1:]])
--- a/ruff_dev/Cargo.toml
+++ b/ruff_dev/Cargo.toml
@@ -1,16 +1,17 @@
 [package]
 name = "ruff_dev"
-version = "0.0.103"
+version = "0.0.113"
 edition = "2021"

 [dependencies]
-anyhow = { version = "1.0.60" }
+anyhow = { version = "1.0.66" }
 clap = { version = "4.0.1", features = ["derive"] }
 codegen = { version = "0.2.0" }
 itertools = { version = "0.10.5" }
+libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "a13ec97dd4eb925bde4d426c6e422582793b260c" }
 ruff = { path = ".." }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
--- a/ruff_dev/src/generate_check_code_prefix.rs
+++ b/ruff_dev/src/generate_check_code_prefix.rs
@@ -11,7 +11,7 @@ use itertools::Itertools;
 use ruff::checks::CheckCode;
 use strum::IntoEnumIterator;

-const FILE: &str = "../src/checks_gen.rs";
+const FILE: &str = "src/checks_gen.rs";

 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
--- a/ruff_dev/src/generate_rules_table.rs
+++ b/ruff_dev/src/generate_rules_table.rs
@@ -3,13 +3,13 @@
 use std::fs;
 use std::fs::OpenOptions;
 use std::io::Write;
+use std::path::PathBuf;

 use anyhow::Result;
 use clap::Args;
 use ruff::checks::{CheckCategory, CheckCode};
 use strum::IntoEnumIterator;

-const FILE: &str = "../README.md";
 const BEGIN_PRAGMA: &str = "<!-- Begin auto-generated sections. -->";
 const END_PRAGMA: &str = "<!-- End auto-generated sections. -->";

@@ -64,7 +64,11 @@ pub fn main(cli: &Cli) -> Result<()> {
        print!("{}", output);
    } else {
        // Read the existing file.
-        let existing = fs::read_to_string(FILE)?;
+        let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .parent()
+            .expect("Failed to find root directory")
+            .join("README.md");
+        let existing = fs::read_to_string(&file)?;

        // Extract the prefix.
        let index = existing
@@ -79,7 +83,7 @@ pub fn main(cli: &Cli) -> Result<()> {
        let suffix = &existing[index..];

        // Write the prefix, new contents, and suffix.
-        let mut f = OpenOptions::new().write(true).truncate(true).open(FILE)?;
+        let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
        write!(f, "{}\n\n", prefix)?;
        write!(f, "{}", output)?;
        write!(f, "{}", suffix)?;
--- a/ruff_dev/src/lib.rs
+++ b/ruff_dev/src/lib.rs
@@ -2,4 +2,5 @@ pub mod generate_check_code_prefix;
 pub mod generate_rules_table;
 pub mod generate_source_code;
 pub mod print_ast;
+pub mod print_cst;
 pub mod print_tokens;
--- a/ruff_dev/src/main.rs
+++ b/ruff_dev/src/main.rs
@@ -1,7 +1,8 @@
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 use ruff_dev::{
-    generate_check_code_prefix, generate_rules_table, generate_source_code, print_ast, print_tokens,
+    generate_check_code_prefix, generate_rules_table, generate_source_code, print_ast, print_cst,
+    print_tokens,
 };

 #[derive(Parser)]
@@ -22,6 +23,8 @@ enum Commands {
    GenerateSourceCode(generate_source_code::Cli),
    /// Print the AST for a given Python file.
    PrintAST(print_ast::Cli),
+    /// Print the LibCST CST for a given Python file.
+    PrintCST(print_cst::Cli),
    /// Print the token stream for a given Python file.
    PrintTokens(print_tokens::Cli),
 }
@@ -33,6 +36,7 @@ fn main() -> Result<()> {
        Commands::GenerateRulesTable(args) => generate_rules_table::main(args)?,
        Commands::GenerateSourceCode(args) => generate_source_code::main(args)?,
        Commands::PrintAST(args) => print_ast::main(args)?,
+        Commands::PrintCST(args) => print_cst::main(args)?,
        Commands::PrintTokens(args) => print_tokens::main(args)?,
    }
    Ok(())
--- a/ruff_dev/src/print_cst.rs
+++ b/ruff_dev/src/print_cst.rs
@@ -0,0 +1,25 @@
+//! Print the LibCST CST for a given Python file.
+
+use std::fs;
+use std::path::PathBuf;
+
+use anyhow::Result;
+use clap::Args;
+
+#[derive(Args)]
+pub struct Cli {
+    /// Python file for which to generate the CST.
+    #[arg(required = true)]
+    file: PathBuf,
+}
+
+pub fn main(cli: &Cli) -> Result<()> {
+    let contents = fs::read_to_string(&cli.file)?;
+    match libcst_native::parse_module(&contents, None) {
+        Ok(python_cst) => {
+            println!("{:#?}", python_cst);
+            Ok(())
+        }
+        Err(_) => Err(anyhow::anyhow!("Failed to parse CST")),
+    }
+}
--- a/src/ast/types.rs
+++ b/src/ast/types.rs
@@ -1,6 +1,7 @@
 use std::collections::BTreeMap;
 use std::sync::atomic::{AtomicUsize, Ordering};

+use rustpython_ast::{Expr, Keyword};
 use rustpython_parser::ast::{Located, Location};

 fn id() -> usize {
@@ -30,25 +31,34 @@ pub struct FunctionScope {
    pub uses_locals: bool,
 }

+#[derive(Clone, Debug, Default)]
+pub struct ClassScope<'a> {
+    pub name: &'a str,
+    pub bases: &'a [Expr],
+    pub keywords: &'a [Keyword],
+    pub decorator_list: &'a [Expr],
+}
+
 #[derive(Clone, Debug)]
-pub enum ScopeKind {
-    Class,
+pub enum ScopeKind<'a> {
+    Class(ClassScope<'a>),
    Function(FunctionScope),
    Generator,
    Module,
    Arg,
+    Lambda,
 }

 #[derive(Clone, Debug)]
-pub struct Scope {
+pub struct Scope<'a> {
    pub id: usize,
-    pub kind: ScopeKind,
+    pub kind: ScopeKind<'a>,
    pub import_starred: bool,
    pub values: BTreeMap<String, Binding>,
 }

-impl Scope {
-    pub fn new(kind: ScopeKind) -> Self {
+impl<'a> Scope<'a> {
+    pub fn new(kind: ScopeKind<'a>) -> Self {
        Scope {
            id: id(),
            kind,
@@ -91,10 +101,6 @@ pub struct Binding {
    pub used: Option<(usize, Range)>,
 }

-pub trait CheckLocator {
-    fn locate_check(&self, default: Range) -> Range;
-}
-
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub enum ImportKind {
    Import,
--- a/src/check_ast.rs
+++ b/src/check_ast.rs
--- a/src/check_imports.rs
+++ b/src/check_imports.rs
@@ -0,0 +1,43 @@
+//! Lint rules based on import analysis.
+
+use nohash_hasher::IntSet;
+use rustpython_parser::ast::Suite;
+
+use crate::ast::visitor::Visitor;
+use crate::autofix::fixer;
+use crate::checks::Check;
+use crate::isort;
+use crate::isort::track::ImportTracker;
+use crate::settings::Settings;
+use crate::source_code_locator::SourceCodeLocator;
+
+fn check_import_blocks(
+    tracker: ImportTracker,
+    locator: &SourceCodeLocator,
+    settings: &Settings,
+    autofix: &fixer::Mode,
+) -> Vec<Check> {
+    let mut checks = vec![];
+    for block in tracker.into_iter() {
+        if !block.is_empty() {
+            if let Some(check) = isort::plugins::check_imports(block, locator, settings, autofix) {
+                checks.push(check);
+            }
+        }
+    }
+    checks
+}
+
+pub fn check_imports(
+    python_ast: &Suite,
+    locator: &SourceCodeLocator,
+    exclusions: &IntSet<usize>,
+    settings: &Settings,
+    autofix: &fixer::Mode,
+) -> Vec<Check> {
+    let mut tracker = ImportTracker::new(exclusions);
+    for stmt in python_ast {
+        tracker.visit_stmt(stmt);
+    }
+    check_import_blocks(tracker, locator, settings, autofix)
+}
--- a/src/check_lines.rs
+++ b/src/check_lines.rs
@@ -1,7 +1,8 @@
 //! Lint rules based on checking raw physical lines.

-use std::collections::BTreeMap;
-
+use nohash_hasher::IntMap;
+use once_cell::sync::Lazy;
+use regex::Regex;
 use rustpython_parser::ast::Location;

 use crate::ast::types::Range;
@@ -11,6 +12,10 @@ use crate::noqa;
 use crate::noqa::Directive;
 use crate::settings::Settings;

+// Regex from PEP263
+static CODING_COMMENT_REGEX: Lazy<Regex> =
+    Lazy::new(|| Regex::new(r"^[ \t\f]*#.*?coding[:=][ \t]*utf-?8").expect("Invalid regex"));
+
 /// Whether the given line is too long and should be reported.
 fn should_enforce_line_length(line: &str, length: usize, limit: usize) -> bool {
    if length > limit {
@@ -30,28 +35,58 @@ fn should_enforce_line_length(line: &str, length: usize, limit: usize) -> bool {
 pub fn check_lines(
    checks: &mut Vec<Check>,
    contents: &str,
-    noqa_line_for: &[usize],
+    noqa_line_for: &IntMap<usize, usize>,
    settings: &Settings,
    autofix: &fixer::Mode,
 ) {
+    let enforce_unnecessary_coding_comment = settings.enabled.contains(&CheckCode::U009);
    let enforce_line_too_long = settings.enabled.contains(&CheckCode::E501);
    let enforce_noqa = settings.enabled.contains(&CheckCode::M001);

-    let mut noqa_directives: BTreeMap<usize, (Directive, Vec<&str>)> = BTreeMap::new();
-
+    let mut noqa_directives: IntMap<usize, (Directive, Vec<&str>)> = IntMap::default();
    let mut line_checks = vec![];
    let mut ignored = vec![];

+    checks.sort_by_key(|check| check.location);
+    let mut checks_iter = checks.iter().enumerate().peekable();
+    if let Some((_index, check)) = checks_iter.peek() {
+        assert!(check.location.row() >= 1);
+    }
+
    let lines: Vec<&str> = contents.lines().collect();
    for (lineno, line) in lines.iter().enumerate() {
        // Grab the noqa (logical) line number for the current (physical) line.
        // If there are newlines at the end of the file, they won't be represented in
        // `noqa_line_for`, so fallback to the current line.
        let noqa_lineno = noqa_line_for
-            .get(lineno)
+            .get(&lineno)
            .map(|lineno| lineno - 1)
            .unwrap_or(lineno);

+        // Enforce unnecessary coding comments (U009).
+        if enforce_unnecessary_coding_comment {
+            if lineno < 2 {
+                // PEP3120 makes utf-8 the default encoding.
+                if CODING_COMMENT_REGEX.is_match(line) {
+                    let line_length = line.len();
+                    let mut check = Check::new(
+                        CheckKind::PEP3120UnnecessaryCodingComment,
+                        Range {
+                            location: Location::new(lineno + 1, 0),
+                            end_location: Location::new(lineno + 1, line_length + 1),
+                        },
+                    );
+                    if autofix.patch() {
+                        check.amend(Fix::deletion(
+                            Location::new(lineno + 1, 0),
+                            Location::new(lineno + 1, line_length + 1),
+                        ));
+                    }
+                    line_checks.push(check);
+                }
+            }
+        }
+
        if enforce_noqa {
            noqa_directives
                .entry(noqa_lineno)
@@ -59,30 +94,29 @@ pub fn check_lines(
        }

        // Remove any ignored checks.
-        // TODO(charlie): Only validate checks for the current line.
-        for (index, check) in checks.iter().enumerate() {
-            if check.location.row() == lineno + 1 {
-                let noqa = noqa_directives
-                    .entry(noqa_lineno)
-                    .or_insert_with(|| (noqa::extract_noqa_directive(lines[noqa_lineno]), vec![]));
+        while let Some((index, check)) =
+            checks_iter.next_if(|(_index, check)| check.location.row() == lineno + 1)
+        {
+            let noqa = noqa_directives
+                .entry(noqa_lineno)
+                .or_insert_with(|| (noqa::extract_noqa_directive(lines[noqa_lineno]), vec![]));

-                match noqa {
-                    (Directive::All(..), matches) => {
-                        matches.push(check.kind.code().as_ref());
-                        ignored.push(index)
-                    }
-                    (Directive::Codes(_, _, codes), matches) => {
-                        if codes.contains(&check.kind.code().as_ref()) {
-                            matches.push(check.kind.code().as_ref());
-                            ignored.push(index);
-                        }
-                    }
-                    (Directive::None, _) => {}
+            match noqa {
+                (Directive::All(..), matches) => {
+                    matches.push(check.kind.code().as_ref());
+                    ignored.push(index)
                }
+                (Directive::Codes(_, _, codes), matches) => {
+                    if codes.contains(&check.kind.code().as_ref()) {
+                        matches.push(check.kind.code().as_ref());
+                        ignored.push(index);
+                    }
+                }
+                (Directive::None, _) => {}
            }
        }

-        // Enforce line length.
+        // Enforce line length violations (E501).
        if enforce_line_too_long {
            let line_length = line.chars().count();
            if should_enforce_line_length(line, line_length, settings.line_length) {
@@ -122,7 +156,7 @@ pub fn check_lines(
        if let Some(line) = lines.last() {
            let lineno = lines.len() - 1;
            let noqa_lineno = noqa_line_for
-                .get(lineno)
+                .get(&lineno)
                .map(|lineno| lineno - 1)
                .unwrap_or(lineno);

@@ -226,6 +260,8 @@ pub fn check_lines(

 #[cfg(test)]
 mod tests {
+    use nohash_hasher::IntMap;
+
    use super::check_lines;
    use crate::autofix::fixer;
    use crate::checks::{Check, CheckCode};
@@ -234,7 +270,7 @@ mod tests {
    #[test]
    fn e501_non_ascii_char() {
        let line = "'\u{4e9c}' * 2"; // 7 in UTF-32, 9 in UTF-8.
-        let noqa_line_for: Vec<usize> = vec![1];
+        let noqa_line_for: IntMap<usize, usize> = Default::default();
        let check_with_max_line_length = |line_length: usize| {
            let mut checks: Vec<Check> = vec![];
            check_lines(
--- a/src/check_tokens.rs
+++ b/src/check_tokens.rs
@@ -5,6 +5,7 @@ use rustpython_parser::lexer::{LexResult, Tok};
 use crate::autofix::fixer;
 use crate::checks::{Check, CheckCode};
 use crate::lex::docstring_detection::StateMachine;
+use crate::rules::checks::Context;
 use crate::source_code_locator::SourceCodeLocator;
 use crate::{flake8_quotes, pycodestyle, rules, Settings};

@@ -16,7 +17,8 @@ pub fn check_tokens(
    autofix: &fixer::Mode,
 ) {
    let enforce_ambiguous_unicode_character = settings.enabled.contains(&CheckCode::RUF001)
-        || settings.enabled.contains(&CheckCode::RUF002);
+        || settings.enabled.contains(&CheckCode::RUF002)
+        || settings.enabled.contains(&CheckCode::RUF003);
    let enforce_quotes = settings.enabled.contains(&CheckCode::Q000)
        || settings.enabled.contains(&CheckCode::Q001)
        || settings.enabled.contains(&CheckCode::Q002)
@@ -31,14 +33,22 @@ pub fn check_tokens(
            false
        };

-        // RUF001, RUF002
+        // RUF001, RUF002, RUF003
        if enforce_ambiguous_unicode_character {
-            if matches!(tok, Tok::String { .. }) {
+            if matches!(tok, Tok::String { .. } | Tok::Comment) {
                for check in rules::checks::ambiguous_unicode_character(
                    locator,
                    start,
                    end,
-                    is_docstring,
+                    if matches!(tok, Tok::String { .. }) {
+                        if is_docstring {
+                            Context::Docstring
+                        } else {
+                            Context::String
+                        }
+                    } else {
+                        Context::Comment
+                    },
                    autofix.patch(),
                ) {
                    if settings.enabled.contains(check.kind.code()) {
--- a/src/checks.rs
+++ b/src/checks.rs
@@ -79,9 +79,13 @@ pub enum CheckCode {
    // flake8-bugbear
    B002,
    B003,
+    B004,
+    B005,
    B006,
    B007,
    B008,
+    B009,
+    B010,
    B011,
    B013,
    B014,
@@ -90,6 +94,7 @@ pub enum CheckCode {
    B017,
    B018,
    B025,
+    B026,
    // flake8-comprehensions
    C400,
    C401,
@@ -115,6 +120,29 @@ pub enum CheckCode {
    Q001,
    Q002,
    Q003,
+    // flake8-annotations
+    ANN001,
+    ANN002,
+    ANN003,
+    ANN101,
+    ANN102,
+    ANN201,
+    ANN202,
+    ANN204,
+    ANN205,
+    ANN206,
+    ANN401,
+    // flake8-2020
+    YTT101,
+    YTT102,
+    YTT103,
+    YTT201,
+    YTT202,
+    YTT203,
+    YTT204,
+    YTT301,
+    YTT302,
+    YTT303,
    // pyupgrade
    U001,
    U002,
@@ -124,6 +152,9 @@ pub enum CheckCode {
    U006,
    U007,
    U008,
+    U009,
+    U010,
+    U011,
    // pydocstyle
    D100,
    D101,
@@ -185,9 +216,12 @@ pub enum CheckCode {
    N816,
    N817,
    N818,
+    // isort
+    I001,
    // Ruff
    RUF001,
    RUF002,
+    RUF003,
    // Meta
    M001,
 }
@@ -196,6 +230,7 @@ pub enum CheckCode {
 pub enum CheckCategory {
    Pyflakes,
    Pycodestyle,
+    Isort,
    Pydocstyle,
    Pyupgrade,
    PEP8Naming,
@@ -204,6 +239,8 @@ pub enum CheckCategory {
    Flake8Builtins,
    Flake8Print,
    Flake8Quotes,
+    Flake8Annotations,
+    Flake82020,
    Ruff,
    Meta,
 }
@@ -213,11 +250,14 @@ impl CheckCategory {
        match self {
            CheckCategory::Pycodestyle => "pycodestyle",
            CheckCategory::Pyflakes => "Pyflakes",
+            CheckCategory::Isort => "isort",
            CheckCategory::Flake8Builtins => "flake8-builtins",
            CheckCategory::Flake8Bugbear => "flake8-bugbear",
            CheckCategory::Flake8Comprehensions => "flake8-comprehensions",
            CheckCategory::Flake8Print => "flake8-print",
            CheckCategory::Flake8Quotes => "flake8-quotes",
+            CheckCategory::Flake8Annotations => "flake8-annotations",
+            CheckCategory::Flake82020 => "flake8-2020",
            CheckCategory::Pyupgrade => "pyupgrade",
            CheckCategory::Pydocstyle => "pydocstyle",
            CheckCategory::PEP8Naming => "pep8-naming",
@@ -230,6 +270,7 @@ impl CheckCategory {
        match self {
            CheckCategory::Pycodestyle => Some("https://pypi.org/project/pycodestyle/2.9.1/"),
            CheckCategory::Pyflakes => Some("https://pypi.org/project/pyflakes/2.5.0/"),
+            CheckCategory::Isort => Some("https://pypi.org/project/isort/5.10.1/"),
            CheckCategory::Flake8Builtins => {
                Some("https://pypi.org/project/flake8-builtins/2.0.1/")
            }
@@ -241,6 +282,10 @@ impl CheckCategory {
            }
            CheckCategory::Flake8Print => Some("https://pypi.org/project/flake8-print/5.0.0/"),
            CheckCategory::Flake8Quotes => Some("https://pypi.org/project/flake8-quotes/3.3.1/"),
+            CheckCategory::Flake8Annotations => {
+                Some("https://pypi.org/project/flake8-annotations/2.9.1/")
+            }
+            CheckCategory::Flake82020 => Some("https://pypi.org/project/flake8-2020/1.7.0/"),
            CheckCategory::Pyupgrade => Some("https://pypi.org/project/pyupgrade/3.2.0/"),
            CheckCategory::Pydocstyle => Some("https://pypi.org/project/pydocstyle/6.1.1/"),
            CheckCategory::PEP8Naming => Some("https://pypi.org/project/pep8-naming/0.13.2/"),
@@ -256,6 +301,7 @@ pub enum LintSource {
    FileSystem,
    Lines,
    Tokens,
+    Imports,
 }

 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -320,9 +366,13 @@ pub enum CheckKind {
    // flake8-bugbear
    UnaryPrefixIncrement,
    AssignmentToOsEnviron,
+    UnreliableCallableCheck,
+    StripWithMultiCharacters,
    MutableArgumentDefault,
    UnusedLoopControlVariable(String),
    FunctionCallArgumentDefault,
+    GetAttrWithConstant,
+    SetAttrWithConstant,
    DoNotAssertFalse,
    RedundantTupleInExceptionHandler(String),
    DuplicateHandlerException(Vec<String>),
@@ -331,6 +381,7 @@ pub enum CheckKind {
    NoAssertRaisesException,
    UselessExpression,
    DuplicateTryBlockException(String),
+    StarArgUnpackingAfterKeywordArg,
    // flake8-comprehensions
    UnnecessaryGeneratorList,
    UnnecessaryGeneratorSet,
@@ -356,6 +407,29 @@ pub enum CheckKind {
    BadQuotesMultilineString(Quote),
    BadQuotesDocstring(Quote),
    AvoidQuoteEscape,
+    // flake8-annotations
+    MissingTypeFunctionArgument(String),
+    MissingTypeArgs(String),
+    MissingTypeKwargs(String),
+    MissingTypeSelf(String),
+    MissingTypeCls(String),
+    MissingReturnTypePublicFunction(String),
+    MissingReturnTypePrivateFunction(String),
+    MissingReturnTypeMagicMethod(String),
+    MissingReturnTypeStaticMethod(String),
+    MissingReturnTypeClassMethod(String),
+    DynamicallyTypedExpression(String),
+    // flake8-2020
+    SysVersionSlice3Referenced,
+    SysVersion2Referenced,
+    SysVersionCmpStr3,
+    SysVersionInfo0Eq3Referenced,
+    SixPY3Referenced,
+    SysVersionInfo1CmpInt,
+    SysVersionInfoMinorCmpInt,
+    SysVersion0Referenced,
+    SysVersionCmpStr10,
+    SysVersionSlice1Referenced,
    // pyupgrade
    TypeOfPrimitive(Primitive),
    UnnecessaryAbspath,
@@ -365,6 +439,9 @@ pub enum CheckKind {
    UsePEP585Annotation(String),
    UsePEP604Annotation,
    SuperCallWithParameters,
+    PEP3120UnnecessaryCodingComment,
+    UnnecessaryFutureImport(String),
+    UnnecessaryLRUCacheParams,
    // pydocstyle
    BlankLineAfterLastSection(String),
    BlankLineAfterSection(String),
@@ -426,9 +503,12 @@ pub enum CheckKind {
    MixedCaseVariableInGlobalScope(String),
    CamelcaseImportedAsAcronym(String, String),
    ErrorSuffixOnExceptionName(String),
+    // isort
+    UnsortedImports,
    // Ruff
    AmbiguousUnicodeCharacterString(char, char),
    AmbiguousUnicodeCharacterDocstring(char, char),
+    AmbiguousUnicodeCharacterComment(char, char),
    // Meta
    UnusedNOQA(Option<Vec<String>>),
 }
@@ -438,15 +518,19 @@ impl CheckCode {
    /// physical lines).
    pub fn lint_source(&self) -> &'static LintSource {
        match self {
-            CheckCode::E501 | CheckCode::W292 | CheckCode::M001 => &LintSource::Lines,
+            CheckCode::E501 | CheckCode::W292 | CheckCode::M001 | CheckCode::U009 => {
+                &LintSource::Lines
+            }
            CheckCode::Q000
            | CheckCode::Q001
            | CheckCode::Q002
            | CheckCode::Q003
            | CheckCode::W605
            | CheckCode::RUF001
-            | CheckCode::RUF002 => &LintSource::Tokens,
+            | CheckCode::RUF002
+            | CheckCode::RUF003 => &LintSource::Tokens,
            CheckCode::E902 => &LintSource::FileSystem,
+            CheckCode::I001 => &LintSource::Imports,
            _ => &LintSource::AST,
        }
    }
@@ -510,9 +594,13 @@ impl CheckCode {
            // flake8-bugbear
            CheckCode::B002 => CheckKind::UnaryPrefixIncrement,
            CheckCode::B003 => CheckKind::AssignmentToOsEnviron,
+            CheckCode::B004 => CheckKind::UnreliableCallableCheck,
+            CheckCode::B005 => CheckKind::StripWithMultiCharacters,
            CheckCode::B006 => CheckKind::MutableArgumentDefault,
            CheckCode::B007 => CheckKind::UnusedLoopControlVariable("i".to_string()),
            CheckCode::B008 => CheckKind::FunctionCallArgumentDefault,
+            CheckCode::B009 => CheckKind::GetAttrWithConstant,
+            CheckCode::B010 => CheckKind::SetAttrWithConstant,
            CheckCode::B011 => CheckKind::DoNotAssertFalse,
            CheckCode::B013 => {
                CheckKind::RedundantTupleInExceptionHandler("ValueError".to_string())
@@ -523,6 +611,7 @@ impl CheckCode {
            CheckCode::B017 => CheckKind::NoAssertRaisesException,
            CheckCode::B018 => CheckKind::UselessExpression,
            CheckCode::B025 => CheckKind::DuplicateTryBlockException("Exception".to_string()),
+            CheckCode::B026 => CheckKind::StarArgUnpackingAfterKeywordArg,
            // flake8-comprehensions
            CheckCode::C400 => CheckKind::UnnecessaryGeneratorList,
            CheckCode::C401 => CheckKind::UnnecessaryGeneratorSet,
@@ -561,6 +650,29 @@ impl CheckCode {
            CheckCode::Q001 => CheckKind::BadQuotesMultilineString(Quote::Double),
            CheckCode::Q002 => CheckKind::BadQuotesDocstring(Quote::Double),
            CheckCode::Q003 => CheckKind::AvoidQuoteEscape,
+            // flake8-annotations
+            CheckCode::ANN001 => CheckKind::MissingTypeFunctionArgument("...".to_string()),
+            CheckCode::ANN002 => CheckKind::MissingTypeArgs("...".to_string()),
+            CheckCode::ANN003 => CheckKind::MissingTypeKwargs("...".to_string()),
+            CheckCode::ANN101 => CheckKind::MissingTypeSelf("...".to_string()),
+            CheckCode::ANN102 => CheckKind::MissingTypeCls("...".to_string()),
+            CheckCode::ANN201 => CheckKind::MissingReturnTypePublicFunction("...".to_string()),
+            CheckCode::ANN202 => CheckKind::MissingReturnTypePrivateFunction("...".to_string()),
+            CheckCode::ANN204 => CheckKind::MissingReturnTypeMagicMethod("...".to_string()),
+            CheckCode::ANN205 => CheckKind::MissingReturnTypeStaticMethod("...".to_string()),
+            CheckCode::ANN206 => CheckKind::MissingReturnTypeClassMethod("...".to_string()),
+            CheckCode::ANN401 => CheckKind::DynamicallyTypedExpression("...".to_string()),
+            // flake8-2020
+            CheckCode::YTT101 => CheckKind::SysVersionSlice3Referenced,
+            CheckCode::YTT102 => CheckKind::SysVersion2Referenced,
+            CheckCode::YTT103 => CheckKind::SysVersionCmpStr3,
+            CheckCode::YTT201 => CheckKind::SysVersionInfo0Eq3Referenced,
+            CheckCode::YTT202 => CheckKind::SixPY3Referenced,
+            CheckCode::YTT203 => CheckKind::SysVersionInfo1CmpInt,
+            CheckCode::YTT204 => CheckKind::SysVersionInfoMinorCmpInt,
+            CheckCode::YTT301 => CheckKind::SysVersion0Referenced,
+            CheckCode::YTT302 => CheckKind::SysVersionCmpStr10,
+            CheckCode::YTT303 => CheckKind::SysVersionSlice1Referenced,
            // pyupgrade
            CheckCode::U001 => CheckKind::UselessMetaclassType,
            CheckCode::U002 => CheckKind::UnnecessaryAbspath,
@@ -573,6 +685,9 @@ impl CheckCode {
            CheckCode::U006 => CheckKind::UsePEP585Annotation("List".to_string()),
            CheckCode::U007 => CheckKind::UsePEP604Annotation,
            CheckCode::U008 => CheckKind::SuperCallWithParameters,
+            CheckCode::U009 => CheckKind::PEP3120UnnecessaryCodingComment,
+            CheckCode::U010 => CheckKind::UnnecessaryFutureImport("...".to_string()),
+            CheckCode::U011 => CheckKind::UnnecessaryLRUCacheParams,
            // pydocstyle
            CheckCode::D100 => CheckKind::PublicModule,
            CheckCode::D101 => CheckKind::PublicClass,
@@ -650,9 +765,12 @@ impl CheckCode {
                CheckKind::CamelcaseImportedAsAcronym("...".to_string(), "...".to_string())
            }
            CheckCode::N818 => CheckKind::ErrorSuffixOnExceptionName("...".to_string()),
+            // isort
+            CheckCode::I001 => CheckKind::UnsortedImports,
            // Ruff
            CheckCode::RUF001 => CheckKind::AmbiguousUnicodeCharacterString('𝐁', 'B'),
            CheckCode::RUF002 => CheckKind::AmbiguousUnicodeCharacterDocstring('𝐁', 'B'),
+            CheckCode::RUF003 => CheckKind::AmbiguousUnicodeCharacterComment('𝐁', 'B'),
            // Meta
            CheckCode::M001 => CheckKind::UnusedNOQA(None),
        }
@@ -709,9 +827,13 @@ impl CheckCode {
            CheckCode::A003 => CheckCategory::Flake8Builtins,
            CheckCode::B002 => CheckCategory::Flake8Bugbear,
            CheckCode::B003 => CheckCategory::Flake8Bugbear,
+            CheckCode::B004 => CheckCategory::Flake8Bugbear,
+            CheckCode::B005 => CheckCategory::Flake8Bugbear,
            CheckCode::B006 => CheckCategory::Flake8Bugbear,
            CheckCode::B007 => CheckCategory::Flake8Bugbear,
            CheckCode::B008 => CheckCategory::Flake8Bugbear,
+            CheckCode::B009 => CheckCategory::Flake8Bugbear,
+            CheckCode::B010 => CheckCategory::Flake8Bugbear,
            CheckCode::B011 => CheckCategory::Flake8Bugbear,
            CheckCode::B013 => CheckCategory::Flake8Bugbear,
            CheckCode::B014 => CheckCategory::Flake8Bugbear,
@@ -720,6 +842,7 @@ impl CheckCode {
            CheckCode::B017 => CheckCategory::Flake8Bugbear,
            CheckCode::B018 => CheckCategory::Flake8Bugbear,
            CheckCode::B025 => CheckCategory::Flake8Bugbear,
+            CheckCode::B026 => CheckCategory::Flake8Bugbear,
            CheckCode::C400 => CheckCategory::Flake8Comprehensions,
            CheckCode::C401 => CheckCategory::Flake8Comprehensions,
            CheckCode::C402 => CheckCategory::Flake8Comprehensions,
@@ -742,6 +865,27 @@ impl CheckCode {
            CheckCode::Q001 => CheckCategory::Flake8Quotes,
            CheckCode::Q002 => CheckCategory::Flake8Quotes,
            CheckCode::Q003 => CheckCategory::Flake8Quotes,
+            CheckCode::ANN001 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN002 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN003 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN101 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN102 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN201 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN202 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN204 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN205 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN206 => CheckCategory::Flake8Annotations,
+            CheckCode::ANN401 => CheckCategory::Flake8Annotations,
+            CheckCode::YTT101 => CheckCategory::Flake82020,
+            CheckCode::YTT102 => CheckCategory::Flake82020,
+            CheckCode::YTT103 => CheckCategory::Flake82020,
+            CheckCode::YTT201 => CheckCategory::Flake82020,
+            CheckCode::YTT202 => CheckCategory::Flake82020,
+            CheckCode::YTT203 => CheckCategory::Flake82020,
+            CheckCode::YTT204 => CheckCategory::Flake82020,
+            CheckCode::YTT301 => CheckCategory::Flake82020,
+            CheckCode::YTT302 => CheckCategory::Flake82020,
+            CheckCode::YTT303 => CheckCategory::Flake82020,
            CheckCode::U001 => CheckCategory::Pyupgrade,
            CheckCode::U002 => CheckCategory::Pyupgrade,
            CheckCode::U003 => CheckCategory::Pyupgrade,
@@ -750,6 +894,9 @@ impl CheckCode {
            CheckCode::U006 => CheckCategory::Pyupgrade,
            CheckCode::U007 => CheckCategory::Pyupgrade,
            CheckCode::U008 => CheckCategory::Pyupgrade,
+            CheckCode::U009 => CheckCategory::Pyupgrade,
+            CheckCode::U010 => CheckCategory::Pyupgrade,
+            CheckCode::U011 => CheckCategory::Pyupgrade,
            CheckCode::D100 => CheckCategory::Pydocstyle,
            CheckCode::D101 => CheckCategory::Pydocstyle,
            CheckCode::D102 => CheckCategory::Pydocstyle,
@@ -809,8 +956,10 @@ impl CheckCode {
            CheckCode::N816 => CheckCategory::PEP8Naming,
            CheckCode::N817 => CheckCategory::PEP8Naming,
            CheckCode::N818 => CheckCategory::PEP8Naming,
+            CheckCode::I001 => CheckCategory::Isort,
            CheckCode::RUF001 => CheckCategory::Ruff,
            CheckCode::RUF002 => CheckCategory::Ruff,
+            CheckCode::RUF003 => CheckCategory::Ruff,
            CheckCode::M001 => CheckCategory::Meta,
        }
    }
@@ -873,9 +1022,13 @@ impl CheckKind {
            // flake8-bugbear
            CheckKind::UnaryPrefixIncrement => &CheckCode::B002,
            CheckKind::AssignmentToOsEnviron => &CheckCode::B003,
+            CheckKind::UnreliableCallableCheck => &CheckCode::B004,
+            CheckKind::StripWithMultiCharacters => &CheckCode::B005,
            CheckKind::MutableArgumentDefault => &CheckCode::B006,
            CheckKind::UnusedLoopControlVariable(_) => &CheckCode::B007,
            CheckKind::FunctionCallArgumentDefault => &CheckCode::B008,
+            CheckKind::GetAttrWithConstant => &CheckCode::B009,
+            CheckKind::SetAttrWithConstant => &CheckCode::B010,
            CheckKind::DoNotAssertFalse => &CheckCode::B011,
            CheckKind::RedundantTupleInExceptionHandler(_) => &CheckCode::B013,
            CheckKind::DuplicateHandlerException(_) => &CheckCode::B014,
@@ -884,6 +1037,7 @@ impl CheckKind {
            CheckKind::NoAssertRaisesException => &CheckCode::B017,
            CheckKind::UselessExpression => &CheckCode::B018,
            CheckKind::DuplicateTryBlockException(_) => &CheckCode::B025,
+            CheckKind::StarArgUnpackingAfterKeywordArg => &CheckCode::B026,
            // flake8-comprehensions
            CheckKind::UnnecessaryGeneratorList => &CheckCode::C400,
            CheckKind::UnnecessaryGeneratorSet => &CheckCode::C401,
@@ -909,6 +1063,29 @@ impl CheckKind {
            CheckKind::BadQuotesMultilineString(_) => &CheckCode::Q001,
            CheckKind::BadQuotesDocstring(_) => &CheckCode::Q002,
            CheckKind::AvoidQuoteEscape => &CheckCode::Q003,
+            // flake8-annotations
+            CheckKind::MissingTypeFunctionArgument(_) => &CheckCode::ANN001,
+            CheckKind::MissingTypeArgs(_) => &CheckCode::ANN002,
+            CheckKind::MissingTypeKwargs(_) => &CheckCode::ANN003,
+            CheckKind::MissingTypeSelf(_) => &CheckCode::ANN101,
+            CheckKind::MissingTypeCls(_) => &CheckCode::ANN102,
+            CheckKind::MissingReturnTypePublicFunction(_) => &CheckCode::ANN201,
+            CheckKind::MissingReturnTypePrivateFunction(_) => &CheckCode::ANN202,
+            CheckKind::MissingReturnTypeMagicMethod(_) => &CheckCode::ANN204,
+            CheckKind::MissingReturnTypeStaticMethod(_) => &CheckCode::ANN205,
+            CheckKind::MissingReturnTypeClassMethod(_) => &CheckCode::ANN206,
+            CheckKind::DynamicallyTypedExpression(_) => &CheckCode::ANN401,
+            // flake8-2020
+            CheckKind::SysVersionSlice3Referenced => &CheckCode::YTT101,
+            CheckKind::SysVersion2Referenced => &CheckCode::YTT102,
+            CheckKind::SysVersionCmpStr3 => &CheckCode::YTT103,
+            CheckKind::SysVersionInfo0Eq3Referenced => &CheckCode::YTT201,
+            CheckKind::SixPY3Referenced => &CheckCode::YTT202,
+            CheckKind::SysVersionInfo1CmpInt => &CheckCode::YTT203,
+            CheckKind::SysVersionInfoMinorCmpInt => &CheckCode::YTT204,
+            CheckKind::SysVersion0Referenced => &CheckCode::YTT301,
+            CheckKind::SysVersionCmpStr10 => &CheckCode::YTT302,
+            CheckKind::SysVersionSlice1Referenced => &CheckCode::YTT303,
            // pyupgrade
            CheckKind::TypeOfPrimitive(_) => &CheckCode::U003,
            CheckKind::UnnecessaryAbspath => &CheckCode::U002,
@@ -918,6 +1095,9 @@ impl CheckKind {
            CheckKind::UsePEP604Annotation => &CheckCode::U007,
            CheckKind::UselessObjectInheritance(_) => &CheckCode::U004,
            CheckKind::SuperCallWithParameters => &CheckCode::U008,
+            CheckKind::PEP3120UnnecessaryCodingComment => &CheckCode::U009,
+            CheckKind::UnnecessaryFutureImport(_) => &CheckCode::U010,
+            CheckKind::UnnecessaryLRUCacheParams => &CheckCode::U011,
            // pydocstyle
            CheckKind::BlankLineAfterLastSection(_) => &CheckCode::D413,
            CheckKind::BlankLineAfterSection(_) => &CheckCode::D410,
@@ -979,9 +1159,12 @@ impl CheckKind {
            CheckKind::MixedCaseVariableInGlobalScope(..) => &CheckCode::N816,
            CheckKind::CamelcaseImportedAsAcronym(..) => &CheckCode::N817,
            CheckKind::ErrorSuffixOnExceptionName(..) => &CheckCode::N818,
+            // isort
+            CheckKind::UnsortedImports => &CheckCode::I001,
            // Ruff
            CheckKind::AmbiguousUnicodeCharacterString(..) => &CheckCode::RUF001,
            CheckKind::AmbiguousUnicodeCharacterDocstring(..) => &CheckCode::RUF002,
+            CheckKind::AmbiguousUnicodeCharacterComment(..) => &CheckCode::RUF003,
            // Meta
            CheckKind::UnusedNOQA(_) => &CheckCode::M001,
        }
@@ -1145,6 +1328,13 @@ impl CheckKind {
            CheckKind::AssignmentToOsEnviron => {
                "Assigning to `os.environ` doesn't clear the environment.".to_string()
            }
+            CheckKind::UnreliableCallableCheck => " Using `hasattr(x, '__call__')` to test if x \
+                                                   is callable is unreliable. Use `callable(x)` \
+                                                   for consistent results."
+                .to_string(),
+            CheckKind::StripWithMultiCharacters => "Using `.strip()` with multi-character strings \
+                                                    is misleading the reader."
+                .to_string(),
            CheckKind::MutableArgumentDefault => {
                "Do not use mutable data structures for argument defaults.".to_string()
            }
@@ -1155,6 +1345,14 @@ impl CheckKind {
            CheckKind::FunctionCallArgumentDefault => {
                "Do not perform function calls in argument defaults.".to_string()
            }
+            CheckKind::GetAttrWithConstant => "Do not call `getattr` with a constant attribute \
+                                               value, it is not any safer than normal property \
+                                               access."
+                .to_string(),
+            CheckKind::SetAttrWithConstant => "Do not call `setattr` with a constant attribute \
+                                               value, it is not any safer than normal property \
+                                               access."
+                .to_string(),
            CheckKind::DoNotAssertFalse => "Do not `assert False` (`python -O` removes these \
                                            calls), raise `AssertionError()`"
                .to_string(),
@@ -1193,6 +1391,13 @@ impl CheckKind {
            CheckKind::DuplicateTryBlockException(name) => {
                format!("try-except block with duplicate exception `{name}`")
            }
+            CheckKind::StarArgUnpackingAfterKeywordArg => {
+                "Star-arg unpacking after a keyword argument is strongly discouraged, because it \
+                 only works when the keyword parameter is declared after all parameters supplied \
+                 by the unpacked sequence, and this change of ordering can surprise and mislead \
+                 readers."
+                    .to_string()
+            }
            // flake8-comprehensions
            CheckKind::UnnecessaryGeneratorList => {
                "Unnecessary generator (rewrite as a `list` comprehension)".to_string()
@@ -1293,6 +1498,70 @@ impl CheckKind {
            CheckKind::AvoidQuoteEscape => {
                "Change outer quotes to avoid escaping inner quotes".to_string()
            }
+            // flake8-annotations
+            CheckKind::MissingTypeFunctionArgument(name) => {
+                format!("Missing type annotation for function argument `{name}`")
+            }
+            CheckKind::MissingTypeArgs(name) => format!("Missing type annotation for `*{name}`"),
+            CheckKind::MissingTypeKwargs(name) => {
+                format!("Missing type annotation for `**{name}`")
+            }
+            CheckKind::MissingTypeSelf(name) => {
+                format!("Missing type annotation for `{name}` in method")
+            }
+            CheckKind::MissingTypeCls(name) => {
+                format!("Missing type annotation for `{name}` in classmethod")
+            }
+            CheckKind::MissingReturnTypePublicFunction(name) => {
+                format!("Missing return type annotation for public function `{name}`")
+            }
+            CheckKind::MissingReturnTypePrivateFunction(name) => {
+                format!("Missing return type annotation for private function `{name}`")
+            }
+            CheckKind::MissingReturnTypeMagicMethod(name) => {
+                format!("Missing return type annotation for magic method `{name}`")
+            }
+            CheckKind::MissingReturnTypeStaticMethod(name) => {
+                format!("Missing return type annotation for staticmethod `{name}`")
+            }
+            CheckKind::MissingReturnTypeClassMethod(name) => {
+                format!("Missing return type annotation for classmethod `{name}`")
+            }
+            CheckKind::DynamicallyTypedExpression(name) => {
+                format!("Dynamically typed expressions (typing.Any) are disallowed in `{name}`")
+            }
+            // flake8-2020
+            CheckKind::SysVersionSlice3Referenced => {
+                "`sys.version[:3]` referenced (python3.10), use `sys.version_info`".to_string()
+            }
+            CheckKind::SysVersion2Referenced => {
+                "`sys.version[2]` referenced (python3.10), use `sys.version_info`".to_string()
+            }
+            CheckKind::SysVersionCmpStr3 => {
+                "`sys.version` compared to string (python3.10), use `sys.version_info`".to_string()
+            }
+            CheckKind::SysVersionInfo0Eq3Referenced => {
+                "`sys.version_info[0] == 3` referenced (python4), use `>=`".to_string()
+            }
+            CheckKind::SixPY3Referenced => {
+                "`six.PY3` referenced (python4), use `not six.PY2`".to_string()
+            }
+            CheckKind::SysVersionInfo1CmpInt => "`sys.version_info[1]` compared to integer \
+                                                 (python4), compare `sys.version_info` to tuple"
+                .to_string(),
+            CheckKind::SysVersionInfoMinorCmpInt => "`sys.version_info.minor` compared to integer \
+                                                     (python4), compare `sys.version_info` to \
+                                                     tuple"
+                .to_string(),
+            CheckKind::SysVersion0Referenced => {
+                "`sys.version[0]` referenced (python10), use `sys.version_info`".to_string()
+            }
+            CheckKind::SysVersionCmpStr10 => {
+                "`sys.version` compared to string (python10), use `sys.version_info`".to_string()
+            }
+            CheckKind::SysVersionSlice1Referenced => {
+                "`sys.version[:1]` referenced (python10), use `sys.version_info`".to_string()
+            }
            // pyupgrade
            CheckKind::TypeOfPrimitive(primitive) => {
                format!("Use `{}` instead of `type(...)`", primitive.builtin())
@@ -1318,6 +1587,12 @@ impl CheckKind {
            CheckKind::SuperCallWithParameters => {
                "Use `super()` instead of `super(__class__, self)`".to_string()
            }
+            CheckKind::UnnecessaryFutureImport(name) => {
+                format!("Unnessary __future__ import `{name}` for target Python version")
+            }
+            CheckKind::UnnecessaryLRUCacheParams => {
+                "Unnessary parameters to functools.lru_cache".to_string()
+            }
            // pydocstyle
            CheckKind::FitsOnOneLine => "One-line docstring should fit on one line".to_string(),
            CheckKind::BlankLineAfterSummary => {
@@ -1478,6 +1753,11 @@ impl CheckKind {
            CheckKind::ErrorSuffixOnExceptionName(name) => {
                format!("Exception name `{name}` should be named with an Error suffix")
            }
+            CheckKind::PEP3120UnnecessaryCodingComment => {
+                "utf-8 encoding declaration is unnecessary".to_string()
+            }
+            // isort
+            CheckKind::UnsortedImports => "Import block is un-sorted or un-formatted".to_string(),
            // Ruff
            CheckKind::AmbiguousUnicodeCharacterString(confusable, representant) => {
                format!(
@@ -1491,6 +1771,12 @@ impl CheckKind {
                     '{representant}'?)"
                )
            }
+            CheckKind::AmbiguousUnicodeCharacterComment(confusable, representant) => {
+                format!(
+                    "Comment contains ambiguous unicode character '{confusable}' (did you mean \
+                     '{representant}'?)"
+                )
+            }
            // Meta
            CheckKind::UnusedNOQA(codes) => match codes {
                None => "Unused `noqa` directive".to_string(),
@@ -1524,6 +1810,9 @@ impl CheckKind {
            CheckKind::NoAssertRaisesException => {
                "`assertRaises(Exception):` should be considered evil.".to_string()
            }
+            CheckKind::StarArgUnpackingAfterKeywordArg => {
+                "Star-arg unpacking after a keyword argument is strongly discouraged.".to_string()
+            }
            _ => self.body(),
        }
    }
@@ -1543,6 +1832,8 @@ impl CheckKind {
                | CheckKind::DeprecatedUnittestAlias(_, _)
                | CheckKind::DoNotAssertFalse
                | CheckKind::DuplicateHandlerException(_)
+                | CheckKind::GetAttrWithConstant
+                | CheckKind::IsLiteral
                | CheckKind::NewLineAfterLastParagraph
                | CheckKind::NewLineAfterSectionName(_)
                | CheckKind::NoBlankLineAfterFunction(_)
@@ -1554,6 +1845,7 @@ impl CheckKind {
                | CheckKind::NoUnderIndentation
                | CheckKind::OneBlankLineAfterClass(_)
                | CheckKind::OneBlankLineBeforeClass(_)
+                | CheckKind::PEP3120UnnecessaryCodingComment
                | CheckKind::PPrintFound
                | CheckKind::PrintFound
                | CheckKind::RaiseNotImplemented
@@ -1570,12 +1862,15 @@ impl CheckKind {
                | CheckKind::UnnecessaryGeneratorDict
                | CheckKind::UnnecessaryGeneratorList
                | CheckKind::UnnecessaryGeneratorSet
+                | CheckKind::UnnecessaryLRUCacheParams
                | CheckKind::UnnecessaryListCall
+                | CheckKind::UnnecessaryListComprehensionDict
                | CheckKind::UnnecessaryListComprehensionSet
                | CheckKind::UnnecessaryLiteralDict(_)
                | CheckKind::UnnecessaryLiteralSet(_)
                | CheckKind::UnnecessaryLiteralWithinListCall(_)
                | CheckKind::UnnecessaryLiteralWithinTupleCall(_)
+                | CheckKind::UnsortedImports
                | CheckKind::UnusedImport(_, false)
                | CheckKind::UnusedLoopControlVariable(_)
                | CheckKind::UnusedNOQA(_)
--- a/src/checks_gen.rs
+++ b/src/checks_gen.rs
@@ -13,15 +13,39 @@ pub enum CheckCodePrefix {
    A001,
    A002,
    A003,
+    ANN,
+    ANN0,
+    ANN00,
+    ANN001,
+    ANN002,
+    ANN003,
+    ANN1,
+    ANN10,
+    ANN101,
+    ANN102,
+    ANN2,
+    ANN20,
+    ANN201,
+    ANN202,
+    ANN204,
+    ANN205,
+    ANN206,
+    ANN4,
+    ANN40,
+    ANN401,
    B,
    B0,
    B00,
    B002,
    B003,
+    B004,
+    B005,
    B006,
    B007,
    B008,
+    B009,
    B01,
+    B010,
    B011,
    B013,
    B014,
@@ -31,6 +55,7 @@ pub enum CheckCodePrefix {
    B018,
    B02,
    B025,
+    B026,
    C,
    C4,
    C40,
@@ -179,6 +204,10 @@ pub enum CheckCodePrefix {
    F9,
    F90,
    F901,
+    I,
+    I0,
+    I00,
+    I001,
    M,
    M0,
    M00,
@@ -214,6 +243,7 @@ pub enum CheckCodePrefix {
    RUF00,
    RUF001,
    RUF002,
+    RUF003,
    T,
    T2,
    T20,
@@ -230,6 +260,10 @@ pub enum CheckCodePrefix {
    U006,
    U007,
    U008,
+    U009,
+    U01,
+    U010,
+    U011,
    W,
    W2,
    W29,
@@ -237,6 +271,23 @@ pub enum CheckCodePrefix {
    W6,
    W60,
    W605,
+    YTT,
+    YTT1,
+    YTT10,
+    YTT101,
+    YTT102,
+    YTT103,
+    YTT2,
+    YTT20,
+    YTT201,
+    YTT202,
+    YTT203,
+    YTT204,
+    YTT3,
+    YTT30,
+    YTT301,
+    YTT302,
+    YTT303,
 }

 #[derive(PartialEq, Eq, PartialOrd, Ord)]
@@ -256,12 +307,60 @@ impl CheckCodePrefix {
            CheckCodePrefix::A001 => vec![CheckCode::A001],
            CheckCodePrefix::A002 => vec![CheckCode::A002],
            CheckCodePrefix::A003 => vec![CheckCode::A003],
+            CheckCodePrefix::ANN => vec![
+                CheckCode::ANN001,
+                CheckCode::ANN002,
+                CheckCode::ANN003,
+                CheckCode::ANN101,
+                CheckCode::ANN102,
+                CheckCode::ANN201,
+                CheckCode::ANN202,
+                CheckCode::ANN204,
+                CheckCode::ANN205,
+                CheckCode::ANN206,
+                CheckCode::ANN401,
+            ],
+            CheckCodePrefix::ANN0 => vec![CheckCode::ANN001, CheckCode::ANN002, CheckCode::ANN003],
+            CheckCodePrefix::ANN00 => vec![CheckCode::ANN001, CheckCode::ANN002, CheckCode::ANN003],
+            CheckCodePrefix::ANN001 => vec![CheckCode::ANN001],
+            CheckCodePrefix::ANN002 => vec![CheckCode::ANN002],
+            CheckCodePrefix::ANN003 => vec![CheckCode::ANN003],
+            CheckCodePrefix::ANN1 => vec![CheckCode::ANN101, CheckCode::ANN102],
+            CheckCodePrefix::ANN10 => vec![CheckCode::ANN101, CheckCode::ANN102],
+            CheckCodePrefix::ANN101 => vec![CheckCode::ANN101],
+            CheckCodePrefix::ANN102 => vec![CheckCode::ANN102],
+            CheckCodePrefix::ANN2 => vec![
+                CheckCode::ANN201,
+                CheckCode::ANN202,
+                CheckCode::ANN204,
+                CheckCode::ANN205,
+                CheckCode::ANN206,
+            ],
+            CheckCodePrefix::ANN20 => vec![
+                CheckCode::ANN201,
+                CheckCode::ANN202,
+                CheckCode::ANN204,
+                CheckCode::ANN205,
+                CheckCode::ANN206,
+            ],
+            CheckCodePrefix::ANN201 => vec![CheckCode::ANN201],
+            CheckCodePrefix::ANN202 => vec![CheckCode::ANN202],
+            CheckCodePrefix::ANN204 => vec![CheckCode::ANN204],
+            CheckCodePrefix::ANN205 => vec![CheckCode::ANN205],
+            CheckCodePrefix::ANN206 => vec![CheckCode::ANN206],
+            CheckCodePrefix::ANN4 => vec![CheckCode::ANN401],
+            CheckCodePrefix::ANN40 => vec![CheckCode::ANN401],
+            CheckCodePrefix::ANN401 => vec![CheckCode::ANN401],
            CheckCodePrefix::B => vec![
                CheckCode::B002,
                CheckCode::B003,
+                CheckCode::B004,
+                CheckCode::B005,
                CheckCode::B006,
                CheckCode::B007,
                CheckCode::B008,
+                CheckCode::B009,
+                CheckCode::B010,
                CheckCode::B011,
                CheckCode::B013,
                CheckCode::B014,
@@ -270,13 +369,18 @@ impl CheckCodePrefix {
                CheckCode::B017,
                CheckCode::B018,
                CheckCode::B025,
+                CheckCode::B026,
            ],
            CheckCodePrefix::B0 => vec![
                CheckCode::B002,
                CheckCode::B003,
+                CheckCode::B004,
+                CheckCode::B005,
                CheckCode::B006,
                CheckCode::B007,
                CheckCode::B008,
+                CheckCode::B009,
+                CheckCode::B010,
                CheckCode::B011,
                CheckCode::B013,
                CheckCode::B014,
@@ -285,20 +389,28 @@ impl CheckCodePrefix {
                CheckCode::B017,
                CheckCode::B018,
                CheckCode::B025,
+                CheckCode::B026,
            ],
            CheckCodePrefix::B00 => vec![
                CheckCode::B002,
                CheckCode::B003,
+                CheckCode::B004,
+                CheckCode::B005,
                CheckCode::B006,
                CheckCode::B007,
                CheckCode::B008,
+                CheckCode::B009,
            ],
            CheckCodePrefix::B002 => vec![CheckCode::B002],
            CheckCodePrefix::B003 => vec![CheckCode::B003],
+            CheckCodePrefix::B004 => vec![CheckCode::B004],
+            CheckCodePrefix::B005 => vec![CheckCode::B005],
            CheckCodePrefix::B006 => vec![CheckCode::B006],
            CheckCodePrefix::B007 => vec![CheckCode::B007],
            CheckCodePrefix::B008 => vec![CheckCode::B008],
+            CheckCodePrefix::B009 => vec![CheckCode::B009],
            CheckCodePrefix::B01 => vec![
+                CheckCode::B010,
                CheckCode::B011,
                CheckCode::B013,
                CheckCode::B014,
@@ -307,6 +419,7 @@ impl CheckCodePrefix {
                CheckCode::B017,
                CheckCode::B018,
            ],
+            CheckCodePrefix::B010 => vec![CheckCode::B010],
            CheckCodePrefix::B011 => vec![CheckCode::B011],
            CheckCodePrefix::B013 => vec![CheckCode::B013],
            CheckCodePrefix::B014 => vec![CheckCode::B014],
@@ -314,8 +427,9 @@ impl CheckCodePrefix {
            CheckCodePrefix::B016 => vec![CheckCode::B016],
            CheckCodePrefix::B017 => vec![CheckCode::B017],
            CheckCodePrefix::B018 => vec![CheckCode::B018],
-            CheckCodePrefix::B02 => vec![CheckCode::B025],
+            CheckCodePrefix::B02 => vec![CheckCode::B025, CheckCode::B026],
            CheckCodePrefix::B025 => vec![CheckCode::B025],
+            CheckCodePrefix::B026 => vec![CheckCode::B026],
            CheckCodePrefix::C => vec![
                CheckCode::C400,
                CheckCode::C401,
@@ -764,6 +878,10 @@ impl CheckCodePrefix {
            CheckCodePrefix::F9 => vec![CheckCode::F901],
            CheckCodePrefix::F90 => vec![CheckCode::F901],
            CheckCodePrefix::F901 => vec![CheckCode::F901],
+            CheckCodePrefix::I => vec![CheckCode::I001],
+            CheckCodePrefix::I0 => vec![CheckCode::I001],
+            CheckCodePrefix::I00 => vec![CheckCode::I001],
+            CheckCodePrefix::I001 => vec![CheckCode::I001],
            CheckCodePrefix::M => vec![CheckCode::M001],
            CheckCodePrefix::M0 => vec![CheckCode::M001],
            CheckCodePrefix::M00 => vec![CheckCode::M001],
@@ -858,11 +976,12 @@ impl CheckCodePrefix {
            CheckCodePrefix::Q001 => vec![CheckCode::Q001],
            CheckCodePrefix::Q002 => vec![CheckCode::Q002],
            CheckCodePrefix::Q003 => vec![CheckCode::Q003],
-            CheckCodePrefix::RUF => vec![CheckCode::RUF001, CheckCode::RUF002],
-            CheckCodePrefix::RUF0 => vec![CheckCode::RUF001, CheckCode::RUF002],
-            CheckCodePrefix::RUF00 => vec![CheckCode::RUF001, CheckCode::RUF002],
+            CheckCodePrefix::RUF => vec![CheckCode::RUF001, CheckCode::RUF002, CheckCode::RUF003],
+            CheckCodePrefix::RUF0 => vec![CheckCode::RUF001, CheckCode::RUF002, CheckCode::RUF003],
+            CheckCodePrefix::RUF00 => vec![CheckCode::RUF001, CheckCode::RUF002, CheckCode::RUF003],
            CheckCodePrefix::RUF001 => vec![CheckCode::RUF001],
            CheckCodePrefix::RUF002 => vec![CheckCode::RUF002],
+            CheckCodePrefix::RUF003 => vec![CheckCode::RUF003],
            CheckCodePrefix::T => vec![CheckCode::T201, CheckCode::T203],
            CheckCodePrefix::T2 => vec![CheckCode::T201, CheckCode::T203],
            CheckCodePrefix::T20 => vec![CheckCode::T201, CheckCode::T203],
@@ -877,6 +996,9 @@ impl CheckCodePrefix {
                CheckCode::U006,
                CheckCode::U007,
                CheckCode::U008,
+                CheckCode::U009,
+                CheckCode::U010,
+                CheckCode::U011,
            ],
            CheckCodePrefix::U0 => vec![
                CheckCode::U001,
@@ -887,6 +1009,9 @@ impl CheckCodePrefix {
                CheckCode::U006,
                CheckCode::U007,
                CheckCode::U008,
+                CheckCode::U009,
+                CheckCode::U010,
+                CheckCode::U011,
            ],
            CheckCodePrefix::U00 => vec![
                CheckCode::U001,
@@ -897,6 +1022,7 @@ impl CheckCodePrefix {
                CheckCode::U006,
                CheckCode::U007,
                CheckCode::U008,
+                CheckCode::U009,
            ],
            CheckCodePrefix::U001 => vec![CheckCode::U001],
            CheckCodePrefix::U002 => vec![CheckCode::U002],
@@ -906,6 +1032,10 @@ impl CheckCodePrefix {
            CheckCodePrefix::U006 => vec![CheckCode::U006],
            CheckCodePrefix::U007 => vec![CheckCode::U007],
            CheckCodePrefix::U008 => vec![CheckCode::U008],
+            CheckCodePrefix::U009 => vec![CheckCode::U009],
+            CheckCodePrefix::U01 => vec![CheckCode::U010, CheckCode::U011],
+            CheckCodePrefix::U010 => vec![CheckCode::U010],
+            CheckCodePrefix::U011 => vec![CheckCode::U011],
            CheckCodePrefix::W => vec![CheckCode::W292, CheckCode::W605],
            CheckCodePrefix::W2 => vec![CheckCode::W292],
            CheckCodePrefix::W29 => vec![CheckCode::W292],
@@ -913,6 +1043,44 @@ impl CheckCodePrefix {
            CheckCodePrefix::W6 => vec![CheckCode::W605],
            CheckCodePrefix::W60 => vec![CheckCode::W605],
            CheckCodePrefix::W605 => vec![CheckCode::W605],
+            CheckCodePrefix::YTT => vec![
+                CheckCode::YTT101,
+                CheckCode::YTT102,
+                CheckCode::YTT103,
+                CheckCode::YTT201,
+                CheckCode::YTT202,
+                CheckCode::YTT203,
+                CheckCode::YTT204,
+                CheckCode::YTT301,
+                CheckCode::YTT302,
+                CheckCode::YTT303,
+            ],
+            CheckCodePrefix::YTT1 => vec![CheckCode::YTT101, CheckCode::YTT102, CheckCode::YTT103],
+            CheckCodePrefix::YTT10 => vec![CheckCode::YTT101, CheckCode::YTT102, CheckCode::YTT103],
+            CheckCodePrefix::YTT101 => vec![CheckCode::YTT101],
+            CheckCodePrefix::YTT102 => vec![CheckCode::YTT102],
+            CheckCodePrefix::YTT103 => vec![CheckCode::YTT103],
+            CheckCodePrefix::YTT2 => vec![
+                CheckCode::YTT201,
+                CheckCode::YTT202,
+                CheckCode::YTT203,
+                CheckCode::YTT204,
+            ],
+            CheckCodePrefix::YTT20 => vec![
+                CheckCode::YTT201,
+                CheckCode::YTT202,
+                CheckCode::YTT203,
+                CheckCode::YTT204,
+            ],
+            CheckCodePrefix::YTT201 => vec![CheckCode::YTT201],
+            CheckCodePrefix::YTT202 => vec![CheckCode::YTT202],
+            CheckCodePrefix::YTT203 => vec![CheckCode::YTT203],
+            CheckCodePrefix::YTT204 => vec![CheckCode::YTT204],
+            CheckCodePrefix::YTT3 => vec![CheckCode::YTT301, CheckCode::YTT302, CheckCode::YTT303],
+            CheckCodePrefix::YTT30 => vec![CheckCode::YTT301, CheckCode::YTT302, CheckCode::YTT303],
+            CheckCodePrefix::YTT301 => vec![CheckCode::YTT301],
+            CheckCodePrefix::YTT302 => vec![CheckCode::YTT302],
+            CheckCodePrefix::YTT303 => vec![CheckCode::YTT303],
        }
    }
 }
@@ -926,15 +1094,39 @@ impl CheckCodePrefix {
            CheckCodePrefix::A001 => PrefixSpecificity::Explicit,
            CheckCodePrefix::A002 => PrefixSpecificity::Explicit,
            CheckCodePrefix::A003 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN => PrefixSpecificity::Category,
+            CheckCodePrefix::ANN0 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::ANN00 => PrefixSpecificity::Tens,
+            CheckCodePrefix::ANN001 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN002 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN003 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN1 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::ANN10 => PrefixSpecificity::Tens,
+            CheckCodePrefix::ANN101 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN102 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN2 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::ANN20 => PrefixSpecificity::Tens,
+            CheckCodePrefix::ANN201 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN202 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN204 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN205 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN206 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::ANN4 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::ANN40 => PrefixSpecificity::Tens,
+            CheckCodePrefix::ANN401 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B => PrefixSpecificity::Category,
            CheckCodePrefix::B0 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::B00 => PrefixSpecificity::Tens,
            CheckCodePrefix::B002 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B003 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::B004 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::B005 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B006 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B007 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B008 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::B009 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B01 => PrefixSpecificity::Tens,
+            CheckCodePrefix::B010 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B011 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B013 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B014 => PrefixSpecificity::Explicit,
@@ -944,6 +1136,7 @@ impl CheckCodePrefix {
            CheckCodePrefix::B018 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B02 => PrefixSpecificity::Tens,
            CheckCodePrefix::B025 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::B026 => PrefixSpecificity::Explicit,
            CheckCodePrefix::C => PrefixSpecificity::Category,
            CheckCodePrefix::C4 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::C40 => PrefixSpecificity::Tens,
@@ -1092,6 +1285,10 @@ impl CheckCodePrefix {
            CheckCodePrefix::F9 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::F90 => PrefixSpecificity::Tens,
            CheckCodePrefix::F901 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::I => PrefixSpecificity::Category,
+            CheckCodePrefix::I0 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::I00 => PrefixSpecificity::Tens,
+            CheckCodePrefix::I001 => PrefixSpecificity::Explicit,
            CheckCodePrefix::M => PrefixSpecificity::Category,
            CheckCodePrefix::M0 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::M00 => PrefixSpecificity::Tens,
@@ -1127,6 +1324,7 @@ impl CheckCodePrefix {
            CheckCodePrefix::RUF00 => PrefixSpecificity::Tens,
            CheckCodePrefix::RUF001 => PrefixSpecificity::Explicit,
            CheckCodePrefix::RUF002 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::RUF003 => PrefixSpecificity::Explicit,
            CheckCodePrefix::T => PrefixSpecificity::Category,
            CheckCodePrefix::T2 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::T20 => PrefixSpecificity::Tens,
@@ -1143,6 +1341,10 @@ impl CheckCodePrefix {
            CheckCodePrefix::U006 => PrefixSpecificity::Explicit,
            CheckCodePrefix::U007 => PrefixSpecificity::Explicit,
            CheckCodePrefix::U008 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::U009 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::U01 => PrefixSpecificity::Tens,
+            CheckCodePrefix::U010 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::U011 => PrefixSpecificity::Explicit,
            CheckCodePrefix::W => PrefixSpecificity::Category,
            CheckCodePrefix::W2 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::W29 => PrefixSpecificity::Tens,
@@ -1150,6 +1352,23 @@ impl CheckCodePrefix {
            CheckCodePrefix::W6 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::W60 => PrefixSpecificity::Tens,
            CheckCodePrefix::W605 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT => PrefixSpecificity::Category,
+            CheckCodePrefix::YTT1 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::YTT10 => PrefixSpecificity::Tens,
+            CheckCodePrefix::YTT101 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT102 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT103 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT2 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::YTT20 => PrefixSpecificity::Tens,
+            CheckCodePrefix::YTT201 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT202 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT203 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT204 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT3 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::YTT30 => PrefixSpecificity::Tens,
+            CheckCodePrefix::YTT301 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT302 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::YTT303 => PrefixSpecificity::Explicit,
        }
    }
 }
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -10,7 +10,7 @@ use crate::checks_gen::CheckCodePrefix;
 use crate::logging::LogLevel;
 use crate::printer::SerializationFormat;
 use crate::settings::configuration::Configuration;
-use crate::settings::types::{PatternPrefixPair, PythonVersion};
+use crate::settings::types::{PatternPrefixPair, PerFileIgnore, PythonVersion};

 #[derive(Debug, Parser)]
 #[command(author, about = "ruff: An extremely fast Python linter.")]
@@ -38,8 +38,10 @@ pub struct Cli {
    #[arg(short, long)]
    pub watch: bool,
    /// Attempt to automatically fix lint errors.
-    #[arg(short, long)]
-    pub fix: bool,
+    #[arg(long, overrides_with("no_fix"))]
+    fix: bool,
+    #[clap(long, overrides_with("fix"), hide = true)]
+    no_fix: bool,
    /// Disable cache reads.
    #[arg(short, long)]
    pub no_cache: bool,
@@ -94,6 +96,22 @@ pub struct Cli {
    pub stdin_filename: Option<String>,
 }

+impl Cli {
+    // See: https://github.com/clap-rs/clap/issues/3146
+    pub fn fix(&self) -> Option<bool> {
+        resolve_bool_arg(self.fix, self.no_fix)
+    }
+}
+
+fn resolve_bool_arg(yes: bool, no: bool) -> Option<bool> {
+    match (yes, no) {
+        (true, false) => Some(true),
+        (false, true) => Some(false),
+        (false, false) => None,
+        (..) => unreachable!("Clap should make this impossible"),
+    }
+}
+
 /// Map the CLI settings to a `LogLevel`.
 pub fn extract_log_level(cli: &Cli) -> LogLevel {
    if cli.silent {
@@ -165,10 +183,11 @@ pub fn warn_on(
    }
 }

-/// Collect a list of `PatternPrefixPair` structs as a `BTreeMap`.
+/// Convert a list of `PatternPrefixPair` structs to `PerFileIgnore`.
 pub fn collect_per_file_ignores(
    pairs: Vec<PatternPrefixPair>,
-) -> BTreeMap<String, Vec<CheckCodePrefix>> {
+    project_root: &Option<PathBuf>,
+) -> Vec<PerFileIgnore> {
    let mut per_file_ignores: BTreeMap<String, Vec<CheckCodePrefix>> = BTreeMap::new();
    for pair in pairs {
        per_file_ignores
@@ -177,4 +196,7 @@ pub fn collect_per_file_ignores(
            .push(pair.prefix);
    }
    per_file_ignores
+        .iter()
+        .map(|(pattern, prefixes)| PerFileIgnore::new(pattern, prefixes, project_root))
+        .collect()
 }
--- a/src/cst/matchers.rs
+++ b/src/cst/matchers.rs
@@ -1,5 +1,5 @@
 use anyhow::Result;
-use libcst_native::Module;
+use libcst_native::{Expr, Module, SmallStatement, Statement};

 pub fn match_module(module_text: &str) -> Result<Module> {
    match libcst_native::parse_module(module_text, None) {
@@ -7,3 +7,15 @@ pub fn match_module(module_text: &str) -> Result<Module> {
        Err(_) => Err(anyhow::anyhow!("Failed to extract CST from source.")),
    }
 }
+
+pub fn match_expr<'a, 'b>(module: &'a mut Module<'b>) -> Result<&'a mut Expr<'b>> {
+    if let Some(Statement::Simple(expr)) = module.body.first_mut() {
+        if let Some(SmallStatement::Expr(expr)) = expr.body.first_mut() {
+            Ok(expr)
+        } else {
+            Err(anyhow::anyhow!("Expected node to be: SmallStatement::Expr"))
+        }
+    } else {
+        Err(anyhow::anyhow!("Expected node to be: Statement::Simple"))
+    }
+}
--- a/src/directives.rs
+++ b/src/directives.rs
@@ -0,0 +1,206 @@
+//! Extract `# noqa` and `# isort: skip` directives from tokenized source.
+
+use bitflags::bitflags;
+use nohash_hasher::{IntMap, IntSet};
+use rustpython_ast::Location;
+use rustpython_parser::lexer::{LexResult, Tok};
+
+use crate::ast::types::Range;
+use crate::checks::LintSource;
+use crate::{Settings, SourceCodeLocator};
+
+bitflags! {
+    pub struct Flags: u32 {
+        const NOQA = 0b00000001;
+        const ISORT = 0b00000010;
+    }
+}
+
+impl Flags {
+    pub fn from_settings(settings: &Settings) -> Self {
+        if settings
+            .enabled
+            .iter()
+            .any(|check_code| matches!(check_code.lint_source(), LintSource::Imports))
+        {
+            Flags::NOQA | Flags::ISORT
+        } else {
+            Flags::NOQA
+        }
+    }
+}
+
+pub struct Directives {
+    pub noqa_line_for: IntMap<usize, usize>,
+    pub isort_exclusions: IntSet<usize>,
+}
+
+pub fn extract_directives(
+    lxr: &[LexResult],
+    locator: &SourceCodeLocator,
+    flags: &Flags,
+) -> Directives {
+    Directives {
+        noqa_line_for: if flags.contains(Flags::NOQA) {
+            extract_noqa_line_for(lxr)
+        } else {
+            Default::default()
+        },
+        isort_exclusions: if flags.contains(Flags::ISORT) {
+            extract_isort_exclusions(lxr, locator)
+        } else {
+            Default::default()
+        },
+    }
+}
+
+/// Extract a mapping from logical line to noqa line.
+pub fn extract_noqa_line_for(lxr: &[LexResult]) -> IntMap<usize, usize> {
+    let mut noqa_line_for: IntMap<usize, usize> = IntMap::default();
+    for (start, tok, end) in lxr.iter().flatten() {
+        if matches!(tok, Tok::EndOfFile) {
+            break;
+        }
+        // For multi-line strings, we expect `noqa` directives on the last line of the
+        // string.
+        if matches!(tok, Tok::String { .. }) && end.row() > start.row() {
+            for i in start.row()..end.row() {
+                noqa_line_for.insert(i, end.row());
+            }
+        }
+    }
+    noqa_line_for
+}
+
+/// Extract a set of lines over which to disable isort.
+pub fn extract_isort_exclusions(lxr: &[LexResult], locator: &SourceCodeLocator) -> IntSet<usize> {
+    let mut exclusions: IntSet<usize> = IntSet::default();
+    let mut off: Option<&Location> = None;
+    for (start, tok, end) in lxr.iter().flatten() {
+        // TODO(charlie): Modify RustPython to include the comment text in the token.
+        if matches!(tok, Tok::Comment) {
+            let comment_text = locator.slice_source_code_range(&Range {
+                location: *start,
+                end_location: *end,
+            });
+            if off.is_some() {
+                if comment_text == "# isort: on" {
+                    if let Some(start) = off {
+                        for row in start.row() + 1..=end.row() {
+                            exclusions.insert(row);
+                        }
+                    }
+                    off = None;
+                }
+            } else {
+                if comment_text.contains("isort: skip") || comment_text.contains("isort:skip") {
+                    exclusions.insert(start.row());
+                } else if comment_text == "# isort: off" {
+                    off = Some(start);
+                }
+            }
+        } else if matches!(tok, Tok::EndOfFile) {
+            if let Some(start) = off {
+                for row in start.row() + 1..=end.row() {
+                    exclusions.insert(row);
+                }
+            }
+            break;
+        }
+    }
+    exclusions
+}
+
+#[cfg(test)]
+mod tests {
+    use anyhow::Result;
+    use nohash_hasher::IntMap;
+    use rustpython_parser::lexer;
+    use rustpython_parser::lexer::LexResult;
+
+    use crate::directives::extract_noqa_line_for;
+
+    #[test]
+    fn extraction() -> Result<()> {
+        let empty: IntMap<usize, usize> = Default::default();
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+y = 2
+z = x + 1",
+        )
+        .collect();
+        assert_eq!(extract_noqa_line_for(&lxr), empty);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "
+x = 1
+y = 2
+z = x + 1",
+        )
+        .collect();
+        assert_eq!(extract_noqa_line_for(&lxr), empty);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+y = 2
+z = x + 1
+        ",
+        )
+        .collect();
+        assert_eq!(extract_noqa_line_for(&lxr), empty);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+
+y = 2
+z = x + 1
+        ",
+        )
+        .collect();
+        assert_eq!(extract_noqa_line_for(&lxr), empty);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = '''abc
+def
+ghi
+'''
+y = 2
+z = x + 1",
+        )
+        .collect();
+        assert_eq!(
+            extract_noqa_line_for(&lxr),
+            IntMap::from_iter([(1, 4), (2, 4), (3, 4)])
+        );
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+        y = '''abc
+        def
+        ghi
+        '''
+        z = 2",
+        )
+        .collect();
+        assert_eq!(
+            extract_noqa_line_for(&lxr),
+            IntMap::from_iter([(2, 5), (3, 5), (4, 5)])
+        );
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+        y = '''abc
+        def
+        ghi
+        '''",
+        )
+        .collect();
+        assert_eq!(
+            extract_noqa_line_for(&lxr),
+            IntMap::from_iter([(2, 5), (3, 5), (4, 5)])
+        );
+
+        Ok(())
+    }
+}
--- a/src/docstrings/helpers.rs
+++ b/src/docstrings/helpers.rs
@@ -1,4 +1,4 @@
-use rustpython_ast::{Expr, Location};
+use rustpython_ast::{Located, Location};

 use crate::ast::types::Range;
 use crate::check_ast::Checker;
@@ -24,9 +24,9 @@ pub fn leading_space(line: &str) -> String {
        .collect()
 }

-/// Extract the leading indentation from a docstring.
-pub fn indentation<'a>(checker: &'a Checker, docstring: &Expr) -> String {
-    let range = Range::from_located(docstring);
+/// Extract the leading indentation from a line.
+pub fn indentation<'a, T>(checker: &'a Checker, located: &Located<T>) -> String {
+    let range = Range::from_located(located);
    checker
        .locator
        .slice_source_code_range(&Range {
--- a/src/flake8_2020/mod.rs
+++ b/src/flake8_2020/mod.rs
@@ -0,0 +1 @@
+pub mod plugins;
--- a/src/flake8_2020/plugins.rs
+++ b/src/flake8_2020/plugins.rs
@@ -0,0 +1,192 @@
+use num_bigint::BigInt;
+use rustpython_ast::{Cmpop, Constant, Expr, ExprKind, Located};
+
+use crate::ast::helpers::match_name_or_attr_from_module;
+use crate::ast::types::Range;
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckCode, CheckKind};
+
+fn is_sys(checker: &Checker, expr: &Expr, target: &str) -> bool {
+    match_name_or_attr_from_module(expr, target, "sys", checker.from_imports.get("sys"))
+}
+
+/// YTT101, YTT102, YTT301, YTT303
+pub fn subscript(checker: &mut Checker, value: &Expr, slice: &Expr) {
+    if is_sys(checker, value, "version") {
+        match &slice.node {
+            ExprKind::Slice {
+                lower: None,
+                upper: Some(upper),
+                step: None,
+                ..
+            } => {
+                if let ExprKind::Constant {
+                    value: Constant::Int(i),
+                    ..
+                } = &upper.node
+                {
+                    if *i == BigInt::from(1)
+                        && checker.settings.enabled.contains(&CheckCode::YTT303)
+                    {
+                        checker.add_check(Check::new(
+                            CheckKind::SysVersionSlice1Referenced,
+                            Range::from_located(value),
+                        ));
+                    } else if *i == BigInt::from(3)
+                        && checker.settings.enabled.contains(&CheckCode::YTT101)
+                    {
+                        checker.add_check(Check::new(
+                            CheckKind::SysVersionSlice3Referenced,
+                            Range::from_located(value),
+                        ));
+                    }
+                }
+            }
+
+            ExprKind::Constant {
+                value: Constant::Int(i),
+                ..
+            } => {
+                if *i == BigInt::from(2) && checker.settings.enabled.contains(&CheckCode::YTT102) {
+                    checker.add_check(Check::new(
+                        CheckKind::SysVersion2Referenced,
+                        Range::from_located(value),
+                    ));
+                } else if *i == BigInt::from(0)
+                    && checker.settings.enabled.contains(&CheckCode::YTT301)
+                {
+                    checker.add_check(Check::new(
+                        CheckKind::SysVersion0Referenced,
+                        Range::from_located(value),
+                    ));
+                }
+            }
+
+            _ => {}
+        }
+    }
+}
+
+/// YTT103, YTT201, YTT203, YTT204, YTT302
+pub fn compare(checker: &mut Checker, left: &Expr, ops: &[Cmpop], comparators: &[Expr]) {
+    match &left.node {
+        ExprKind::Subscript { value, slice, .. } if is_sys(checker, value, "version_info") => {
+            if let ExprKind::Constant {
+                value: Constant::Int(i),
+                ..
+            } = &slice.node
+            {
+                if *i == BigInt::from(0) {
+                    if let (
+                        [Cmpop::Eq | Cmpop::NotEq],
+                        [Located {
+                            node:
+                                ExprKind::Constant {
+                                    value: Constant::Int(n),
+                                    ..
+                                },
+                            ..
+                        }],
+                    ) = (ops, comparators)
+                    {
+                        if *n == BigInt::from(3)
+                            && checker.settings.enabled.contains(&CheckCode::YTT201)
+                        {
+                            checker.add_check(Check::new(
+                                CheckKind::SysVersionInfo0Eq3Referenced,
+                                Range::from_located(left),
+                            ));
+                        }
+                    }
+                } else if *i == BigInt::from(1) {
+                    if let (
+                        [Cmpop::Lt | Cmpop::LtE | Cmpop::Gt | Cmpop::GtE],
+                        [Located {
+                            node:
+                                ExprKind::Constant {
+                                    value: Constant::Int(_),
+                                    ..
+                                },
+                            ..
+                        }],
+                    ) = (ops, comparators)
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::YTT203) {
+                            checker.add_check(Check::new(
+                                CheckKind::SysVersionInfo1CmpInt,
+                                Range::from_located(left),
+                            ));
+                        }
+                    }
+                }
+            }
+        }
+
+        ExprKind::Attribute { value, attr, .. }
+            if is_sys(checker, value, "version_info") && attr == "minor" =>
+        {
+            if let (
+                [Cmpop::Lt | Cmpop::LtE | Cmpop::Gt | Cmpop::GtE],
+                [Located {
+                    node:
+                        ExprKind::Constant {
+                            value: Constant::Int(_),
+                            ..
+                        },
+                    ..
+                }],
+            ) = (ops, comparators)
+            {
+                if checker.settings.enabled.contains(&CheckCode::YTT204) {
+                    checker.add_check(Check::new(
+                        CheckKind::SysVersionInfoMinorCmpInt,
+                        Range::from_located(left),
+                    ));
+                }
+            }
+        }
+
+        _ => {}
+    }
+
+    if is_sys(checker, left, "version") {
+        if let (
+            [Cmpop::Lt | Cmpop::LtE | Cmpop::Gt | Cmpop::GtE],
+            [Located {
+                node:
+                    ExprKind::Constant {
+                        value: Constant::Str(s),
+                        ..
+                    },
+                ..
+            }],
+        ) = (ops, comparators)
+        {
+            if s.len() == 1 {
+                if checker.settings.enabled.contains(&CheckCode::YTT302) {
+                    checker.add_check(Check::new(
+                        CheckKind::SysVersionCmpStr10,
+                        Range::from_located(left),
+                    ));
+                }
+            } else if checker.settings.enabled.contains(&CheckCode::YTT103) {
+                checker.add_check(Check::new(
+                    CheckKind::SysVersionCmpStr3,
+                    Range::from_located(left),
+                ));
+            }
+        }
+    }
+}
+
+/// YTT202
+pub fn name_or_attribute(checker: &mut Checker, expr: &Expr) {
+    if match_name_or_attr_from_module(expr, "PY3", "six", checker.from_imports.get("six"))
+        && checker.settings.enabled.contains(&CheckCode::YTT202)
+    {
+        checker.add_check(Check::new(
+            CheckKind::SixPY3Referenced,
+            Range::from_located(expr),
+        ));
+    }
+}
--- a/src/flake8_annotations/mod.rs
+++ b/src/flake8_annotations/mod.rs
@@ -0,0 +1,138 @@
+pub mod plugins;
+pub mod settings;
+
+#[cfg(test)]
+mod tests {
+    use std::path::Path;
+
+    use anyhow::Result;
+
+    use crate::autofix::fixer;
+    use crate::checks::CheckCode;
+    use crate::linter::test_path;
+    use crate::{flake8_annotations, Settings};
+
+    #[test]
+    fn defaults() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_annotations/annotation_presence.py"),
+            &Settings {
+                ..Settings::for_rules(vec![
+                    CheckCode::ANN001,
+                    CheckCode::ANN002,
+                    CheckCode::ANN003,
+                    CheckCode::ANN101,
+                    CheckCode::ANN102,
+                    CheckCode::ANN201,
+                    CheckCode::ANN202,
+                    CheckCode::ANN204,
+                    CheckCode::ANN205,
+                    CheckCode::ANN206,
+                    CheckCode::ANN401,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn suppress_dummy_args() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_annotations/suppress_dummy_args.py"),
+            &Settings {
+                flake8_annotations: flake8_annotations::settings::Settings {
+                    mypy_init_return: false,
+                    suppress_dummy_args: true,
+                    suppress_none_returning: false,
+                    allow_star_arg_any: false,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::ANN001,
+                    CheckCode::ANN002,
+                    CheckCode::ANN003,
+                    CheckCode::ANN101,
+                    CheckCode::ANN102,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn mypy_init_return() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_annotations/mypy_init_return.py"),
+            &Settings {
+                flake8_annotations: flake8_annotations::settings::Settings {
+                    mypy_init_return: true,
+                    suppress_dummy_args: false,
+                    suppress_none_returning: false,
+                    allow_star_arg_any: false,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::ANN201,
+                    CheckCode::ANN202,
+                    CheckCode::ANN204,
+                    CheckCode::ANN205,
+                    CheckCode::ANN206,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn suppress_none_returning() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_annotations/suppress_none_returning.py"),
+            &Settings {
+                flake8_annotations: flake8_annotations::settings::Settings {
+                    mypy_init_return: false,
+                    suppress_dummy_args: false,
+                    suppress_none_returning: true,
+                    allow_star_arg_any: false,
+                },
+                ..Settings::for_rules(vec![
+                    CheckCode::ANN201,
+                    CheckCode::ANN202,
+                    CheckCode::ANN204,
+                    CheckCode::ANN205,
+                    CheckCode::ANN206,
+                ])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn allow_star_arg_any() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_annotations/allow_star_arg_any.py"),
+            &Settings {
+                flake8_annotations: flake8_annotations::settings::Settings {
+                    mypy_init_return: false,
+                    suppress_dummy_args: false,
+                    suppress_none_returning: false,
+                    allow_star_arg_any: true,
+                },
+                ..Settings::for_rules(vec![CheckCode::ANN401])
+            },
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+}
--- a/src/flake8_annotations/plugins.rs
+++ b/src/flake8_annotations/plugins.rs
@@ -0,0 +1,376 @@
+use rustpython_ast::{Arguments, Constant, Expr, ExprKind, Stmt, StmtKind};
+
+use crate::ast::types::Range;
+use crate::ast::visitor;
+use crate::ast::visitor::Visitor;
+use crate::check_ast::Checker;
+use crate::checks::{CheckCode, CheckKind};
+use crate::docstrings::definition::{Definition, DefinitionKind};
+use crate::visibility::Visibility;
+use crate::{visibility, Check};
+
+#[derive(Default)]
+struct ReturnStatementVisitor<'a> {
+    returns: Vec<&'a Option<Box<Expr>>>,
+}
+
+impl<'a, 'b> Visitor<'b> for ReturnStatementVisitor<'a>
+where
+    'b: 'a,
+{
+    fn visit_stmt(&mut self, stmt: &'b Stmt) {
+        match &stmt.node {
+            StmtKind::FunctionDef { .. } | StmtKind::AsyncFunctionDef { .. } => {
+                // No recurse.
+            }
+            StmtKind::Return { value } => self.returns.push(value),
+            _ => visitor::walk_stmt(self, stmt),
+        }
+    }
+}
+
+fn is_none_returning(body: &[Stmt]) -> bool {
+    let mut visitor: ReturnStatementVisitor = Default::default();
+    for stmt in body {
+        visitor.visit_stmt(stmt);
+    }
+    for expr in visitor.returns.into_iter().flatten() {
+        if !matches!(
+            expr.node,
+            ExprKind::Constant {
+                value: Constant::None,
+                ..
+            }
+        ) {
+            return false;
+        }
+    }
+    true
+}
+
+/// ANN401
+fn check_dynamically_typed(checker: &mut Checker, annotation: &Expr, name: &str) {
+    if checker.match_typing_module(annotation, "Any") {
+        checker.add_check(Check::new(
+            CheckKind::DynamicallyTypedExpression(name.to_string()),
+            Range::from_located(annotation),
+        ));
+    };
+}
+
+fn match_function_def(stmt: &Stmt) -> (&str, &Arguments, &Option<Box<Expr>>, &Vec<Stmt>) {
+    match &stmt.node {
+        StmtKind::FunctionDef {
+            name,
+            args,
+            returns,
+            body,
+            ..
+        }
+        | StmtKind::AsyncFunctionDef {
+            name,
+            args,
+            returns,
+            body,
+            ..
+        } => (name, args, returns, body),
+        _ => panic!("Found non-FunctionDef in match_name"),
+    }
+}
+
+/// Generate flake8-annotation checks for a given `Definition`.
+pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &Visibility) {
+    // TODO(charlie): Consider using the AST directly here rather than `Definition`.
+    // We could adhere more closely to `flake8-annotations` by defining public
+    // vs. secret vs. protected.
+    match &definition.kind {
+        DefinitionKind::Module => {}
+        DefinitionKind::Package => {}
+        DefinitionKind::Class(_) => {}
+        DefinitionKind::NestedClass(_) => {}
+        DefinitionKind::Function(stmt) | DefinitionKind::NestedFunction(stmt) => {
+            let (name, args, returns, body) = match_function_def(stmt);
+
+            // ANN001, ANN401
+            for arg in args
+                .args
+                .iter()
+                .chain(args.posonlyargs.iter())
+                .chain(args.kwonlyargs.iter())
+            {
+                if let Some(expr) = &arg.node.annotation {
+                    if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                        check_dynamically_typed(checker, expr, &arg.node.arg);
+                    };
+                } else {
+                    if !(checker.settings.flake8_annotations.suppress_dummy_args
+                        && checker.settings.dummy_variable_rgx.is_match(&arg.node.arg))
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::ANN001) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingTypeFunctionArgument(arg.node.arg.to_string()),
+                                Range::from_located(arg),
+                            ));
+                        }
+                    }
+                }
+            }
+
+            // ANN002, ANN401
+            if let Some(arg) = &args.vararg {
+                if let Some(expr) = &arg.node.annotation {
+                    if !checker.settings.flake8_annotations.allow_star_arg_any {
+                        if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                            let name = arg.node.arg.to_string();
+                            check_dynamically_typed(checker, expr, &format!("*{name}"));
+                        }
+                    }
+                } else {
+                    if !(checker.settings.flake8_annotations.suppress_dummy_args
+                        && checker.settings.dummy_variable_rgx.is_match(&arg.node.arg))
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::ANN002) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingTypeArgs(arg.node.arg.to_string()),
+                                Range::from_located(arg),
+                            ));
+                        }
+                    }
+                }
+            }
+
+            // ANN003, ANN401
+            if let Some(arg) = &args.kwarg {
+                if let Some(expr) = &arg.node.annotation {
+                    if !checker.settings.flake8_annotations.allow_star_arg_any {
+                        if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                            let name = arg.node.arg.to_string();
+                            check_dynamically_typed(checker, expr, &format!("**{name}"));
+                        }
+                    }
+                } else {
+                    if !(checker.settings.flake8_annotations.suppress_dummy_args
+                        && checker.settings.dummy_variable_rgx.is_match(&arg.node.arg))
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::ANN003) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingTypeKwargs(arg.node.arg.to_string()),
+                                Range::from_located(arg),
+                            ));
+                        }
+                    }
+                }
+            }
+
+            // ANN201, ANN202, ANN401
+            if let Some(expr) = &returns {
+                if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                    check_dynamically_typed(checker, expr, name);
+                };
+            } else {
+                // Allow omission of return annotation in `__init__` functions, if the function
+                // only returns `None` (explicitly or implicitly).
+                if checker.settings.flake8_annotations.suppress_none_returning
+                    && is_none_returning(body)
+                {
+                    return;
+                }
+
+                match visibility {
+                    Visibility::Public => {
+                        if checker.settings.enabled.contains(&CheckCode::ANN201) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingReturnTypePublicFunction(name.to_string()),
+                                Range::from_located(stmt),
+                            ));
+                        }
+                    }
+                    Visibility::Private => {
+                        if checker.settings.enabled.contains(&CheckCode::ANN202) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingReturnTypePrivateFunction(name.to_string()),
+                                Range::from_located(stmt),
+                            ));
+                        }
+                    }
+                }
+            }
+        }
+        DefinitionKind::Method(stmt) => {
+            let (name, args, returns, body) = match_function_def(stmt);
+            let mut has_any_typed_arg = false;
+
+            // ANN001
+            for arg in args
+                .args
+                .iter()
+                .chain(args.posonlyargs.iter())
+                .chain(args.kwonlyargs.iter())
+                .skip(
+                    // If this is a non-static method, skip `cls` or `self`.
+                    usize::from(!visibility::is_staticmethod(stmt)),
+                )
+            {
+                // ANN401 for dynamically typed arguments
+                if let Some(annotation) = &arg.node.annotation {
+                    has_any_typed_arg = true;
+                    if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                        check_dynamically_typed(checker, annotation, &arg.node.arg);
+                    }
+                } else {
+                    if !(checker.settings.flake8_annotations.suppress_dummy_args
+                        && checker.settings.dummy_variable_rgx.is_match(&arg.node.arg))
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::ANN001) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingTypeFunctionArgument(arg.node.arg.to_string()),
+                                Range::from_located(arg),
+                            ));
+                        }
+                    }
+                }
+            }
+
+            // ANN002, ANN401
+            if let Some(arg) = &args.vararg {
+                has_any_typed_arg = true;
+                if let Some(expr) = &arg.node.annotation {
+                    if !checker.settings.flake8_annotations.allow_star_arg_any {
+                        if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                            let name = arg.node.arg.to_string();
+                            check_dynamically_typed(checker, expr, &format!("*{name}"));
+                        }
+                    }
+                } else {
+                    if !(checker.settings.flake8_annotations.suppress_dummy_args
+                        && checker.settings.dummy_variable_rgx.is_match(&arg.node.arg))
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::ANN002) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingTypeArgs(arg.node.arg.to_string()),
+                                Range::from_located(arg),
+                            ));
+                        }
+                    }
+                }
+            }
+
+            // ANN003, ANN401
+            if let Some(arg) = &args.kwarg {
+                has_any_typed_arg = true;
+                if let Some(expr) = &arg.node.annotation {
+                    if !checker.settings.flake8_annotations.allow_star_arg_any {
+                        if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                            let name = arg.node.arg.to_string();
+                            check_dynamically_typed(checker, expr, &format!("**{name}"));
+                        }
+                    }
+                } else {
+                    if !(checker.settings.flake8_annotations.suppress_dummy_args
+                        && checker.settings.dummy_variable_rgx.is_match(&arg.node.arg))
+                    {
+                        if checker.settings.enabled.contains(&CheckCode::ANN003) {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingTypeKwargs(arg.node.arg.to_string()),
+                                Range::from_located(arg),
+                            ));
+                        }
+                    }
+                }
+            }
+
+            // ANN101, ANN102
+            if !visibility::is_staticmethod(stmt) {
+                if let Some(arg) = args.args.first() {
+                    if arg.node.annotation.is_none() {
+                        if visibility::is_classmethod(stmt) {
+                            if checker.settings.enabled.contains(&CheckCode::ANN102) {
+                                checker.add_check(Check::new(
+                                    CheckKind::MissingTypeCls(arg.node.arg.to_string()),
+                                    Range::from_located(arg),
+                                ));
+                            }
+                        } else {
+                            if checker.settings.enabled.contains(&CheckCode::ANN101) {
+                                checker.add_check(Check::new(
+                                    CheckKind::MissingTypeSelf(arg.node.arg.to_string()),
+                                    Range::from_located(arg),
+                                ));
+                            }
+                        }
+                    }
+                }
+            }
+
+            // ANN201, ANN202
+            if let Some(expr) = &returns {
+                if checker.settings.enabled.contains(&CheckCode::ANN401) {
+                    check_dynamically_typed(checker, expr, name);
+                }
+            } else {
+                // Allow omission of return annotation in `__init__` functions, if the function
+                // only returns `None` (explicitly or implicitly).
+                if checker.settings.flake8_annotations.suppress_none_returning
+                    && is_none_returning(body)
+                {
+                    return;
+                }
+
+                if visibility::is_classmethod(stmt) {
+                    if checker.settings.enabled.contains(&CheckCode::ANN206) {
+                        checker.add_check(Check::new(
+                            CheckKind::MissingReturnTypeClassMethod(name.to_string()),
+                            Range::from_located(stmt),
+                        ));
+                    }
+                } else if visibility::is_staticmethod(stmt) {
+                    if checker.settings.enabled.contains(&CheckCode::ANN205) {
+                        checker.add_check(Check::new(
+                            CheckKind::MissingReturnTypeStaticMethod(name.to_string()),
+                            Range::from_located(stmt),
+                        ));
+                    }
+                } else if visibility::is_magic(stmt) {
+                    if checker.settings.enabled.contains(&CheckCode::ANN204) {
+                        checker.add_check(Check::new(
+                            CheckKind::MissingReturnTypeMagicMethod(name.to_string()),
+                            Range::from_located(stmt),
+                        ));
+                    }
+                } else if visibility::is_init(stmt) {
+                    // Allow omission of return annotation in `__init__` functions, as long as at
+                    // least one argument is typed.
+                    if checker.settings.enabled.contains(&CheckCode::ANN204) {
+                        if !(checker.settings.flake8_annotations.mypy_init_return
+                            && has_any_typed_arg)
+                        {
+                            checker.add_check(Check::new(
+                                CheckKind::MissingReturnTypeMagicMethod(name.to_string()),
+                                Range::from_located(stmt),
+                            ));
+                        }
+                    }
+                } else {
+                    match visibility {
+                        Visibility::Public => {
+                            if checker.settings.enabled.contains(&CheckCode::ANN201) {
+                                checker.add_check(Check::new(
+                                    CheckKind::MissingReturnTypePublicFunction(name.to_string()),
+                                    Range::from_located(stmt),
+                                ));
+                            }
+                        }
+                        Visibility::Private => {
+                            if checker.settings.enabled.contains(&CheckCode::ANN202) {
+                                checker.add_check(Check::new(
+                                    CheckKind::MissingReturnTypePrivateFunction(name.to_string()),
+                                    Range::from_located(stmt),
+                                ));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
--- a/src/flake8_annotations/settings.rs
+++ b/src/flake8_annotations/settings.rs
@@ -0,0 +1,40 @@
+//! Settings for the `flake-annotations` plugin.
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
+#[serde(deny_unknown_fields, rename_all = "kebab-case")]
+pub struct Options {
+    /// Allow omission of a return type hint for `__init__` if at least one
+    /// argument is annotated.
+    pub mypy_init_return: Option<bool>,
+    /// Suppress ANN000-level errors for dummy arguments, like `_`.
+    pub suppress_dummy_args: Option<bool>,
+    /// Suppress ANN200-level errors for functions that meet one of the
+    /// following criteria:
+    /// - Contain no `return` statement
+    /// - Explicit `return` statement(s) all return `None` (explicitly or
+    ///   implicitly).
+    pub suppress_none_returning: Option<bool>,
+    /// Suppress ANN401 for dynamically typed *args and **kwargs.
+    pub allow_star_arg_any: Option<bool>,
+}
+
+#[derive(Debug, Hash, Default)]
+pub struct Settings {
+    pub mypy_init_return: bool,
+    pub suppress_dummy_args: bool,
+    pub suppress_none_returning: bool,
+    pub allow_star_arg_any: bool,
+}
+
+impl Settings {
+    pub fn from_options(options: Options) -> Self {
+        Self {
+            mypy_init_return: options.mypy_init_return.unwrap_or_default(),
+            suppress_dummy_args: options.suppress_dummy_args.unwrap_or_default(),
+            suppress_none_returning: options.suppress_none_returning.unwrap_or_default(),
+            allow_star_arg_any: options.allow_star_arg_any.unwrap_or_default(),
+        }
+    }
+}
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsallow_star_arg_any.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsallow_star_arg_any.snap
@@ -0,0 +1,41 @@
+---
+source: src/flake8_annotations/mod.rs
+expression: checks
+---
+- kind:
+    DynamicallyTypedExpression: a
+  location:
+    row: 10
+    column: 11
+  end_location:
+    row: 10
+    column: 14
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: foo
+  location:
+    row: 15
+    column: 46
+  end_location:
+    row: 15
+    column: 49
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: a
+  location:
+    row: 40
+    column: 28
+  end_location:
+    row: 40
+    column: 31
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: foo_method
+  location:
+    row: 44
+    column: 66
+  end_location:
+    row: 44
+    column: 69
+  fix: ~
+
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsdefaults.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsdefaults.snap
@@ -0,0 +1,203 @@
+---
+source: src/flake8_annotations/mod.rs
+expression: checks
+---
+- kind:
+    MissingReturnTypePublicFunction: foo
+  location:
+    row: 4
+    column: 0
+  end_location:
+    row: 9
+    column: 0
+  fix: ~
+- kind:
+    MissingTypeFunctionArgument: a
+  location:
+    row: 4
+    column: 8
+  end_location:
+    row: 4
+    column: 9
+  fix: ~
+- kind:
+    MissingTypeFunctionArgument: b
+  location:
+    row: 4
+    column: 11
+  end_location:
+    row: 4
+    column: 12
+  fix: ~
+- kind:
+    MissingReturnTypePublicFunction: foo
+  location:
+    row: 9
+    column: 0
+  end_location:
+    row: 14
+    column: 0
+  fix: ~
+- kind:
+    MissingTypeFunctionArgument: b
+  location:
+    row: 9
+    column: 16
+  end_location:
+    row: 9
+    column: 17
+  fix: ~
+- kind:
+    MissingTypeFunctionArgument: b
+  location:
+    row: 14
+    column: 16
+  end_location:
+    row: 14
+    column: 17
+  fix: ~
+- kind:
+    MissingReturnTypePublicFunction: foo
+  location:
+    row: 19
+    column: 0
+  end_location:
+    row: 24
+    column: 0
+  fix: ~
+- kind:
+    MissingReturnTypePublicFunction: foo
+  location:
+    row: 24
+    column: 0
+  end_location:
+    row: 29
+    column: 0
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: a
+  location:
+    row: 44
+    column: 11
+  end_location:
+    row: 44
+    column: 14
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: foo
+  location:
+    row: 49
+    column: 46
+  end_location:
+    row: 49
+    column: 49
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "*args"
+  location:
+    row: 54
+    column: 23
+  end_location:
+    row: 54
+    column: 26
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "**kwargs"
+  location:
+    row: 54
+    column: 38
+  end_location:
+    row: 54
+    column: 41
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "*args"
+  location:
+    row: 59
+    column: 23
+  end_location:
+    row: 59
+    column: 26
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "**kwargs"
+  location:
+    row: 64
+    column: 38
+  end_location:
+    row: 64
+    column: 41
+  fix: ~
+- kind:
+    MissingTypeSelf: self
+  location:
+    row: 74
+    column: 12
+  end_location:
+    row: 74
+    column: 16
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: a
+  location:
+    row: 78
+    column: 28
+  end_location:
+    row: 78
+    column: 31
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: foo
+  location:
+    row: 82
+    column: 66
+  end_location:
+    row: 82
+    column: 69
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "*params"
+  location:
+    row: 86
+    column: 42
+  end_location:
+    row: 86
+    column: 45
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "**options"
+  location:
+    row: 86
+    column: 58
+  end_location:
+    row: 86
+    column: 61
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "*params"
+  location:
+    row: 90
+    column: 42
+  end_location:
+    row: 90
+    column: 45
+  fix: ~
+- kind:
+    DynamicallyTypedExpression: "**options"
+  location:
+    row: 94
+    column: 58
+  end_location:
+    row: 94
+    column: 61
+  fix: ~
+- kind:
+    MissingTypeCls: cls
+  location:
+    row: 104
+    column: 12
+  end_location:
+    row: 104
+    column: 15
+  fix: ~
+
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsmypy_init_return.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsmypy_init_return.snap
@@ -0,0 +1,32 @@
+---
+source: src/flake8_annotations/mod.rs
+expression: checks
+---
+- kind:
+    MissingReturnTypeMagicMethod: __init__
+  location:
+    row: 5
+    column: 4
+  end_location:
+    row: 10
+    column: 0
+  fix: ~
+- kind:
+    MissingReturnTypeMagicMethod: __init__
+  location:
+    row: 11
+    column: 4
+  end_location:
+    row: 16
+    column: 0
+  fix: ~
+- kind:
+    MissingReturnTypePrivateFunction: __init__
+  location:
+    row: 40
+    column: 0
+  end_location:
+    row: 42
+    column: 0
+  fix: ~
+
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestssuppress_dummy_args.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestssuppress_dummy_args.snap
@@ -0,0 +1,6 @@
+---
+source: src/flake8_annotations/mod.rs
+expression: checks
+---
+[]
+
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestssuppress_none_returning.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestssuppress_none_returning.snap
@@ -0,0 +1,23 @@
+---
+source: src/flake8_annotations/mod.rs
+expression: checks
+---
+- kind:
+    MissingReturnTypePublicFunction: foo
+  location:
+    row: 45
+    column: 0
+  end_location:
+    row: 50
+    column: 0
+  fix: ~
+- kind:
+    MissingReturnTypePublicFunction: foo
+  location:
+    row: 50
+    column: 0
+  end_location:
+    row: 56
+    column: 0
+  fix: ~
+
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Charlie Marsh	a21fe716f2	Bump version to 0.0.113	2022-11-11 22:42:02 -05:00
Charlie Marsh	558883299a	Default to isort's import sort logic (#691 )	2022-11-11 22:41:39 -05:00
Charlie Marsh	048a13c795	Add a separate local folder category for imports (#690 )	2022-11-11 22:12:48 -05:00
Anders Kaseorg	5a8b7c1d20	Implement flake8-2020 (sys.version, sys.version_info misuse) (#688 )	2022-11-11 20:39:37 -05:00
Charlie Marsh	f8932ec12b	Add some TODOs around import tracking	2022-11-11 19:07:40 -05:00
Charlie Marsh	2e7878ff48	Bump version to 0.0.112	2022-11-11 17:13:04 -05:00
Anders Kaseorg	5113ded22a	Add ruff.__main__ wrapper to allow invocation as ‘python -m ruff’ (#687 )	2022-11-11 15:53:42 -05:00
Anders Kaseorg	bf7bf7aa17	Only scan checks once in check_lines (#679 )	2022-11-11 13:34:23 -05:00
Charlie Marsh	560c00ff9d	Bump version to 0.0.111	2022-11-11 12:38:23 -05:00
Charlie Marsh	befe64a10e	Support `isort: skip`, `isort: on`, and `isort: off` (#678 )	2022-11-11 12:38:01 -05:00
Charlie Marsh	4eccfdeb69	Fix lambda handling for B010 (#685 )	2022-11-11 11:18:23 -05:00
Charlie Marsh	4123ba9851	Add backticks around setattr	2022-11-11 11:08:22 -05:00
Harutaka Kawamura	e727c24f79	Implement autofix for B009 (#684 )	2022-11-11 11:06:47 -05:00
Harutaka Kawamura	bd3b40688f	Implement B010 (#683 )	2022-11-11 10:26:37 -05:00
Charlie Marsh	b5549382a7	Clarify a few settings for isort behavior (#676 )	2022-11-10 23:19:51 -05:00
Charlie Marsh	8cf745045f	Bump version to 0.0.110	2022-11-10 19:22:45 -05:00
Charlie Marsh	f6992cc98c	Add a test utility for running lint checks (#672 )	2022-11-10 19:22:00 -05:00
Charlie Marsh	3cc74c0564	Implement import sorting (#633 )	2022-11-10 19:05:56 -05:00
Charlie Marsh	887b9aa840	Rename some fixture files (#671 )	2022-11-10 17:28:10 -05:00
Charlie Marsh	faf8556a5c	Limit Ropey to newlines and carriage returns (#670 )	2022-11-10 17:25:30 -05:00
Harutaka Kawamura	1888f6d41b	Implement B009 (#669 )	2022-11-10 13:52:20 -05:00
Charlie Marsh	9d8cd2d2fe	Bump version to 0.0.109	2022-11-10 10:54:27 -05:00
Harutaka Kawamura	05c19f0091	Implement B026 (#668 )	2022-11-10 10:47:42 -05:00
Chammika Mannakkara	8213b64ad5	Fix unnecessary params in `lru_cache` (#667 )	2022-11-10 10:45:12 -05:00
Chammika Mannakkara	ff0f5968fa	Detect unnecessary params in `lru_cache` (#664 )	2022-11-09 10:02:48 -05:00
Charlie Marsh	6c17670aa5	Upgrade LibCST and other crates (#663 )	2022-11-08 17:42:12 -05:00
Charlie Marsh	1347b7ebb6	Add notes to README on editor integrations (#655 )	2022-11-08 16:12:42 -05:00
Reiner Gerecke	f40609f524	Implement autofix for C413 (#661 )	2022-11-08 16:12:29 -05:00
Charlie Marsh	f572acab30	Bump version to 0.0.108	2022-11-08 13:20:35 -05:00
Charlie Marsh	1eb5f3ea75	Support allow_star_arg_any in flake8-to-ruff	2022-11-08 09:51:11 -05:00
Edgar R. M	24aa177912	Implement ANN401 (#657 )	2022-11-08 09:49:44 -05:00
Reiner Gerecke	2ddc768412	Implement fix for C404 (#656 )	2022-11-08 09:37:17 -05:00
Chammika Mannakkara	0f9508f549	Remove unnecessary __future__ imports (#634 )	2022-11-07 22:26:57 -05:00
Charlie Marsh	7c3d387abd	Implement confusing unicode character detection for comments (#653 )	2022-11-07 21:16:34 -05:00
Charlie Marsh	d600650214	Upgrade RustPython (#652 )	2022-11-07 21:07:49 -05:00
Charlie Marsh	43383bb696	Bump version to 0.0.107	2022-11-07 16:39:03 -05:00
Charlie Marsh	ff83f356af	Fix failing flake8-to-ruff tests	2022-11-07 16:38:46 -05:00
Anders Kaseorg	89622425d4	Run annotations plugin if ANN204, ANN205, ANN206 are selected (#649 )	2022-11-07 16:37:49 -05:00
Charlie Marsh	1aafe31c00	Avoid U009 violations when disabled (#650 )	2022-11-07 16:36:39 -05:00
Charlie Marsh	16c5ac1e91	Bump version to 0.0.106	2022-11-07 15:32:54 -05:00
Charlie Marsh	da39cddccb	Include function and argument names in ANN checks (#648 )	2022-11-07 15:27:03 -05:00
Charlie Marsh	de6435f41d	Add a flake8-to-ruff mention (#644 )	2022-11-07 10:59:47 -05:00
Charlie Marsh	589ae48f8c	Update --help	2022-11-07 10:41:04 -05:00
Harutaka Kawamura	35cc3094b5	Implement B005 (#643 )	2022-11-07 10:10:59 -05:00
Charlie Marsh	07c9fc55f6	Add fix option to `pyproject.toml` (#639 )	2022-11-07 09:46:21 -05:00
Harutaka Kawamura	7773e9728b	Implement B004 (#638 )	2022-11-07 09:25:09 -05:00
Charlie Marsh	8fc435bad9	Fix --ignore for ANN101 and ANN102 (#637 )	2022-11-07 09:03:09 -05:00
Charlie Marsh	dd20b23576	Infer plugins based on per-file-ignores, ignores, etc. (#632 )	2022-11-06 22:39:06 -05:00
Charlie Marsh	da8ee1df3e	Add TODO in flake8_annotations	2022-11-06 21:24:46 -05:00
Charlie Marsh	7f77ed0f86	Bump version to 0.0.105	2022-11-06 21:17:00 -05:00
Charlie Marsh	1b33cfb9cb	Respect project root in per-file ignores (#631 )	2022-11-06 21:15:49 -05:00
Charlie Marsh	dbc64f1faa	Remove erroneous Literal entry from subscript list (#630 )	2022-11-06 21:03:41 -05:00
Charlie Marsh	f4b5f0d259	Remove foo.py	2022-11-06 21:03:23 -05:00
Charlie Marsh	85b882fc54	Remove CheckLocator abstraction (#627 )	2022-11-06 17:42:10 -05:00
Charlie Marsh	99d9aa61bf	Implement flake8-annotations (#625 )	2022-11-06 17:25:49 -05:00
Charlie Marsh	050f34dd25	Bump version to 0.0.104	2022-11-06 15:31:10 -05:00
Charlie Marsh	1cd82d588b	Categorize functions in pep8-naming (#624 )	2022-11-06 15:29:49 -05:00
Charlie Marsh	cea9e34942	Update CONTRIBUTING.md (#623 )	2022-11-06 14:31:16 -05:00
Reiner Gerecke	1ede377402	Improve discoverability of dev commands (#621 )	2022-11-06 14:25:59 -05:00
Reiner Gerecke	82eff641fb	Remove utf-8 encoding declaration (#618 )	2022-11-06 14:23:06 -05:00
Charlie Marsh	eb1bc9f092	Allow underscore names in N803 (#622 )	2022-11-06 14:19:02 -05:00
Reiner Gerecke	df88504dea	pyflakes F632 Autofix (#612 )	2022-11-06 06:57:46 -05:00
Anders Kaseorg	b9ec3e9137	Correct source link in CONFUSABLES comment (#617 )	2022-11-05 20:53:05 -04:00
Anders Kaseorg	b067b665ff	Fix B015 false positive on comparison deep inside expression statement (#616 )	2022-11-05 20:13:22 -04:00