Bump version to 0.0.207

Fix __init__.py being private (#1556 )
Previously visibility::module_visibility() returned Private for any module name starting with an underscore, resulting in __init__.py being categorized as private, which in turn resulted in D104 (Missing docstring in public package) never being reported for __init__.py files.
2023-01-02 14:39:32 -05:00 · 2023-01-02 14:39:23 -05:00 · 2023-01-02 14:05:58 -05:00 · 2023-01-02 13:50:11 -05:00 · 2023-01-02 13:40:16 -05:00 · 2023-01-02 12:13:45 -05:00
663 changed files with 22390 additions and 3453 deletions
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -12,7 +12,7 @@ env:
  RUSTUP_MAX_RETRIES: 10

 jobs:
-  cargo_build:
+  cargo-build:
    name: "cargo build"
    runs-on: ubuntu-latest
    steps:
@@ -36,17 +36,13 @@ jobs:
            ${{ runner.os }}-build-
            ${{ runner.os }}-
      - run: cargo build --all --release
-      - run: ./target/release/ruff_dev generate-rules-table
-      - run: ./target/release/ruff_dev generate-options
-      - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated. You may have to rerun 'cargo dev generate-options' and/or 'cargo dev generate-rules-table'."
-      - run: ./target/release/ruff_dev generate-check-code-prefix
-      - run: git diff --quiet src/checks_gen.rs || echo "::error file=src/checks_gen.rs::This file is outdated. You may have to rerun 'cargo dev generate-check-code-prefix'."
-      - run: git diff --exit-code -- README.md src/checks_gen.rs
-      - run: ./target/release/ruff_dev generate-json-schema
-      - run: git diff --quiet ruff.schema.json || echo "::error file=ruff.schema.json::This file is outdated. You may have to rerun 'cargo dev generate-json-schema'."
-      - run: git diff --exit-code -- ruff.schema.json
+      - run: ./target/release/ruff_dev generate-all
+      - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --quiet src/checks_gen.rs || echo "::error file=src/checks_gen.rs::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --quiet ruff.schema.json || echo "::error file=ruff.schema.json::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --exit-code -- README.md src/checks_gen.rs ruff.schema.json

-  cargo_fmt:
+  cargo-fmt:
    name: "cargo fmt"
    runs-on: ubuntu-latest
    steps:
@@ -82,6 +78,7 @@ jobs:
          toolchain: nightly-2022-11-01
          override: true
          components: clippy
+          target: wasm32-unknown-unknown
      - uses: actions/cache@v3
        env:
          cache-name: cache-cargo
@@ -95,8 +92,9 @@ jobs:
            ${{ runner.os }}-build-
            ${{ runner.os }}-
      - run: cargo clippy --workspace --all-targets --all-features -- -D warnings -W clippy::pedantic
+      - run: cargo clippy --workspace --target wasm32-unknown-unknown --all-features -- -D warnings -W clippy::pedantic

-  cargo_test:
+  cargo-test:
    name: "cargo test"
    runs-on: ubuntu-latest
    steps:
@@ -118,11 +116,45 @@ jobs:
            ${{ runner.os }}-build-${{ env.cache-name }}-
            ${{ runner.os }}-build-
            ${{ runner.os }}-
+      - run: cargo install cargo-insta
      - run: pip install black[d]==22.12.0
-      - run: cargo test --all
+      - name: Run tests
+        run: |
+          cargo insta test --all --delete-unreferenced-snapshots
+          git diff --exit-code
      - run: cargo test --package ruff --test black_compatibility_test -- --ignored

-  maturin_build:
+# TODO(charlie): Re-enable the `wasm-pack` tests.
+# See: https://github.com/charliermarsh/ruff/issues/1425
+#  wasm-pack-test:
+#    name: "wasm-pack test"
+#    runs-on: ubuntu-latest
+#    env:
+#      WASM_BINDGEN_TEST_TIMEOUT: 60
+#    steps:
+#      - uses: actions/checkout@v3
+#      - uses: actions-rs/toolchain@v1
+#        with:
+#          profile: minimal
+#          toolchain: nightly-2022-11-01
+#          override: true
+#      - uses: actions/cache@v3
+#        env:
+#          cache-name: cache-cargo
+#        with:
+#          path: |
+#            ~/.cargo/registry
+#            ~/.cargo/git
+#          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/Cargo.lock') }}
+#          restore-keys: |
+#            ${{ runner.os }}-build-${{ env.cache-name }}-
+#            ${{ runner.os }}-build-
+#            ${{ runner.os }}-
+#      - uses: jetli/wasm-pack-action@v0.4.0
+#      - uses: jetli/wasm-bindgen-action@v0.2.0
+#      - run: wasm-pack test --node
+
+  maturin-build:
    name: "maturin build"
    runs-on: ubuntu-latest
    steps:
--- a/.github/workflows/playground.yaml
+++ b/.github/workflows/playground.yaml
@@ -0,0 +1,50 @@
+name: "[Playground] Release"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+
+env:
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  RUSTUP_MAX_RETRIES: 10
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    env:
+       CF_API_TOKEN_EXISTS: ${{ secrets.CF_API_TOKEN != '' }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
+          target: wasm32-unknown-unknown
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: "npm"
+          cache-dependency-path: playground/package-lock.json
+      - uses: jetli/wasm-pack-action@v0.4.0
+      - uses: jetli/wasm-bindgen-action@v0.2.0
+      - name: "Run wasm-pack"
+        run: wasm-pack build --target web --out-dir playground/src/pkg
+      - name: "Install Node dependencies"
+        run: npm ci
+        working-directory: playground
+      - name: "Run TypeScript checks"
+        run: npm run check
+        working-directory: playground
+      - name: "Build JavaScript bundle"
+        run: npm run build
+        working-directory: playground
+      - name: "Deploy to Cloudflare Pages"
+        if: ${{ env.CF_API_TOKEN_EXISTS == 'true' }}
+        uses: cloudflare/wrangler-action@2.0.0
+        with:
+          apiToken: ${{ secrets.CF_API_TOKEN }}
+          accountId: ${{ secrets.CF_ACCOUNT_ID }}
+          command: pages publish playground/dist --project-name=ruff --branch ${GITHUB_HEAD_REF} --commit-hash ${GITHUB_SHA}
--- a/.gitignore
+++ b/.gitignore
@@ -181,3 +181,4 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
+.vimspector.json
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.193
+    rev: v0.0.207
    hooks:
      - id: ruff

--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,6 +9,15 @@ free to submit a PR. For larger changes (e.g., new lint rules, new functionality
 options), consider submitting an [Issue](https://github.com/charliermarsh/ruff/issues) outlining
 your proposed change.

+If you're looking for a place to start, we recommend implementing a new lint rule (see:
+[_Adding a new lint rule_](#example-adding-a-new-lint-rule), which will allow you to learn from and
+pattern-match against the examples in the existing codebase. Many lint rules are inspired by
+existing Python plugins, which can be used as a reference implementation.
+
+As a concrete example: consider taking on one of the rules in [`flake8-simplify`](https://github.com/charliermarsh/ruff/issues/998),
+and looking to the originating [Python source](https://github.com/MartinThoma/flake8-simplify) for
+guidance.
+
 ### Prerequisites

 Ruff is written in Rust. You'll need to install the
@@ -59,29 +68,23 @@ 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. 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.
+lint-rule violations as it goes. If you need to inspect the AST, you can run
+`cargo +nightly 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 --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:
+non-violations designed to evaluate and demonstrate the behavior of your lint rule.

-```rust
-#[test_case(CheckCode::A001, Path::new("A001.py"); "A001")]
-...
-```
+Run `cargo +nightly dev generate-all` to generate the code for your new fixture. Then run Ruff
+locally with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache --select E402`.

-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.
+Once you're satisfied with the output, codify the behavior as a snapshot test by adding a new
+`test_case` macro in the relevant `src/[test-suite-name]/mod.rs` file. 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.
+Finally, regenerate the documentation and generated code with `cargo +nightly dev generate-all`.

 ### Example: Adding a new configuration option

@@ -105,8 +108,7 @@ You may also want to add the new configuration option to the `flake8-to-ruff` to
 responsible for converting `flake8` configuration files to Ruff's TOML format. This logic
 lives in `flake8_to_ruff/src/converter.rs`.

-Run `cargo dev generate-options` to update the documentation for supported configuration options,
-and `cargo dev generate-json-schema` to update the JSON schema for `tool.ruff` in `pyproject.toml`.
+Finally, regenerate the documentation and generated code with `cargo +nightly dev generate-all`.

 ## Release process

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -61,9 +61,9 @@ dependencies = [

 [[package]]
 name = "anyhow"
-version = "1.0.66"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "216261ddc8289130e551ddcd5ce8a064710c0d064a4d2895c67151c92b5443f6"
+checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"

 [[package]]
 name = "ascii"
@@ -86,7 +86,7 @@ version = "2.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fa3d466004a8b4cb1bc34044240a2fd29d17607e2e3bd613eb44fd48e8100da3"
 dependencies = [
- "bstr 1.0.1",
+ "bstr 1.1.0",
 "doc-comment",
 "predicates",
 "predicates-core",
@@ -160,9 +160,9 @@ dependencies = [

 [[package]]
 name = "bstr"
-version = "1.0.1"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fca0852af221f458706eb0725c03e4ed6c46af9ac98e6a689d5e634215d594dd"
+checksum = "b45ea9b00a7b3f2988e9a65ad3917e62123c38dba709b666506207be96d1790b"
 dependencies = [
 "memchr",
 "once_cell",
@@ -193,9 +193,9 @@ checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"

 [[package]]
 name = "cc"
-version = "1.0.77"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9f73505338f7d905b19d18738976aae232eb46b8efc15554ffc56deb5d9ebe4"
+checksum = "a20104e2335ce8a659d6dd92a51a767a0c062599c73b343fd152cb401e828c3d"

 [[package]]
 name = "cfg-if"
@@ -280,9 +280,9 @@ dependencies = [

 [[package]]
 name = "clap"
-version = "4.0.29"
+version = "4.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d63b9e9c07271b9957ad22c173bae2a4d9a81127680962039296abcd2f8251d"
+checksum = "a7db700bc935f9e43e88d00b0850dae18a63773cfbec6d8e070fccf7fef89a39"
 dependencies = [
 "bitflags",
 "clap_derive",
@@ -295,11 +295,11 @@ dependencies = [

 [[package]]
 name = "clap_complete"
-version = "4.0.6"
+version = "4.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7b3c9eae0de7bf8e3f904a5e40612b21fb2e2e566456d177809a48b892d24da"
+checksum = "10861370d2ba66b0f5989f83ebf35db6421713fd92351790e7fdd6c36774c56b"
 dependencies = [
- "clap 4.0.29",
+ "clap 4.0.32",
 ]

 [[package]]
@@ -308,7 +308,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4160b4a4f72ef58bd766bad27c09e6ef1cc9d82a22f6a0f55d152985a4a48e31"
 dependencies = [
- "clap 4.0.29",
+ "clap 4.0.32",
 "clap_complete",
 "clap_complete_fig",
 ]
@@ -319,7 +319,7 @@ version = "4.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46b30e010e669cd021e5004f3be26cff6b7c08d2a8a0d65b48d43a8cc0efd6c3"
 dependencies = [
- "clap 4.0.29",
+ "clap 4.0.32",
 "clap_complete",
 ]

@@ -422,6 +422,26 @@ dependencies = [
 "winapi",
 ]

+[[package]]
+name = "console_error_panic_hook"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
+dependencies = [
+ "cfg-if 1.0.0",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "console_log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501a375961cef1a0d44767200e66e4a559283097e91d0730b1d75dfb2f8a1494"
+dependencies = [
+ "log",
+ "web-sys",
+]
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.3"
@@ -524,9 +544,9 @@ checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"

 [[package]]
 name = "cxx"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdf07d07d6531bfcdbe9b8b739b104610c6508dcc4d63b410585faf338241daf"
+checksum = "5add3fc1717409d029b20c5b6903fc0c0b02fa6741d820054f4a2efa5e5816fd"
 dependencies = [
 "cc",
 "cxxbridge-flags",
@@ -536,9 +556,9 @@ dependencies = [

 [[package]]
 name = "cxx-build"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2eb5b96ecdc99f72657332953d4d9c50135af1bac34277801cc3937906ebd39"
+checksum = "b4c87959ba14bc6fbc61df77c3fcfe180fc32b93538c4f1031dd802ccb5f2ff0"
 dependencies = [
 "cc",
 "codespan-reporting",
@@ -551,15 +571,15 @@ dependencies = [

 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac040a39517fd1674e0f32177648334b0f4074625b5588a64519804ba0553b12"
+checksum = "69a3e162fde4e594ed2b07d0f83c6c67b745e7f28ce58c6df5e6b6bef99dfb59"

 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1362b0ddcfc4eb0a1f57b68bd77dd99f0e826958a96abd0ae9bd092e114ffed6"
+checksum = "3e7e2adeb6a0d4a282e581096b06e1791532b7d576dcde5ccd9382acf55db8e6"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -712,9 +732,9 @@ dependencies = [

 [[package]]
 name = "filetime"
-version = "0.2.18"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b9663d381d07ae25dc88dbdf27df458faa83a9b25336bcac83d5e452b5fc9d3"
+checksum = "4e884668cd0c7480504233e951174ddc3b382f7c2666e3b7310b5c4e7b0c37f9"
 dependencies = [
 "cfg-if 1.0.0",
 "libc",
@@ -730,10 +750,10 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.193-dev.0"
+version = "0.0.207-dev.0"
 dependencies = [
 "anyhow",
- "clap 4.0.29",
+ "clap 4.0.32",
 "configparser",
 "once_cell",
 "regex",
@@ -952,9 +972,9 @@ dependencies = [

 [[package]]
 name = "insta"
-version = "1.22.0"
+version = "1.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "197f4e300af8b23664d4077bf5c40e0afa9ba66a567bb5a51d3def3c7b287d1c"
+checksum = "e48b08a091dfe5b09a6a9688c468fdd5b4396e92ce09e2eb932f0884b02788a4"
 dependencies = [
 "console",
 "lazy_static",
@@ -985,9 +1005,9 @@ dependencies = [

 [[package]]
 name = "is-terminal"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "927609f78c2913a6f6ac3c27a4fe87f43e2a35367c0c4b0f8265e8f49a104330"
+checksum = "28dfb6c8100ccc63462345b67d1bbc3679177c75ee4bf59bf29c8b1d110b8189"
 dependencies = [
 "hermit-abi 0.2.6",
 "io-lifetimes",
@@ -1006,9 +1026,9 @@ dependencies = [

 [[package]]
 name = "itoa"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"
+checksum = "fad582f4b9e86b6caa621cabeb0963332d92eea04729ab12892c2533951e6440"

 [[package]]
 name = "joinery"
@@ -1115,9 +1135,9 @@ dependencies = [

 [[package]]
 name = "libc"
-version = "0.2.138"
+version = "0.2.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db6d7e329c562c5dfab7a46a2afabc8b987ab9a4834c9d1ca04dc54c1546cef8"
+checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"

 [[package]]
 name = "libcst"
@@ -1145,9 +1165,9 @@ dependencies = [

 [[package]]
 name = "link-cplusplus"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9272ab7b96c9046fbc5bc56c06c117cb639fe2d509df0c421cad82d2915cf369"
+checksum = "ecd207c9c713c34f95a097a5b029ac2ce6010530c7b49d7fea24d977dede04f5"
 dependencies = [
 "cc",
 ]
@@ -1160,9 +1180,9 @@ checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"

 [[package]]
 name = "linux-raw-sys"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f9f08d8963a6c613f4b1a78f4f4a4dbfadf8e6545b2d72861731e4858b8b47f"
+checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"

 [[package]]
 name = "lock_api"
@@ -1234,6 +1254,12 @@ dependencies = [
 "windows-sys",
 ]

+[[package]]
+name = "natord"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "308d96db8debc727c3fd9744aac51751243420e46edf401010908da7f8d5e57c"
+
 [[package]]
 name = "new_debug_unreachable"
 version = "1.0.4"
@@ -1334,11 +1360,11 @@ dependencies = [

 [[package]]
 name = "num_cpus"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6058e64324c71e02bc2b150e4f3bc8286db6c83092132ffa3f6b1eab0f9def5"
+checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
 dependencies = [
- "hermit-abi 0.1.19",
+ "hermit-abi 0.2.6",
 "libc",
 ]

@@ -1385,9 +1411,9 @@ dependencies = [

 [[package]]
 name = "paste"
-version = "1.0.9"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1de2e551fb905ac83f73f7aedf2f0cb4a0da7e35efa24a202a936269f1f18e1"
+checksum = "d01a5bd0424d00070b0098dd17ebca6f961a959dead1dbcbbbc1d1cd8d3deeba"

 [[package]]
 name = "path-absolutize"
@@ -1625,9 +1651,9 @@ dependencies = [

 [[package]]
 name = "proc-macro2"
-version = "1.0.47"
+version = "1.0.49"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+checksum = "57a8eca9f9c4ffde41714334dee777596264c7825420f521abc92b5b5deb63a5"
 dependencies = [
 "unicode-ident",
 ]
@@ -1657,9 +1683,9 @@ dependencies = [

 [[package]]
 name = "quote"
-version = "1.0.21"
+version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
 dependencies = [
 "proc-macro2",
 ]
@@ -1753,11 +1779,10 @@ dependencies = [

 [[package]]
 name = "rayon"
-version = "1.6.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e060280438193c554f654141c9ea9417886713b7acd75974c85b18a69a88e0b"
+checksum = "6db3a213adf02b3bcfd2d3846bb41cb22857d131789e01df434fb7e7bc0759b7"
 dependencies = [
- "crossbeam-deque",
 "either",
 "rayon-core",
 ]
@@ -1853,7 +1878,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.193"
+version = "0.0.207"
 dependencies = [
 "annotate-snippets 0.9.1",
 "anyhow",
@@ -1862,12 +1887,15 @@ dependencies = [
 "bincode",
 "bitflags",
 "cachedir",
+ "cfg-if 1.0.0",
 "chrono",
- "clap 4.0.29",
+ "clap 4.0.32",
 "clap_complete_command",
 "clearscreen",
 "colored",
 "common-path",
+ "console_error_panic_hook",
+ "console_log",
 "criterion",
 "dirs 4.0.0",
 "fern",
@@ -1878,8 +1906,10 @@ dependencies = [
 "ignore",
 "insta",
 "itertools",
+ "js-sys",
 "libcst",
 "log",
+ "natord",
 "nohash-hasher",
 "notify",
 "num-bigint",
@@ -1895,9 +1925,12 @@ dependencies = [
 "rustpython-common",
 "rustpython-parser",
 "schemars",
+ "semver",
 "serde",
+ "serde-wasm-bindgen",
 "serde_json",
 "shellexpand",
+ "similar",
 "strum",
 "strum_macros",
 "test-case",
@@ -1907,14 +1940,16 @@ dependencies = [
 "update-informer",
 "ureq",
 "walkdir",
+ "wasm-bindgen",
+ "wasm-bindgen-test",
 ]

 [[package]]
 name = "ruff_dev"
-version = "0.0.193"
+version = "0.0.207"
 dependencies = [
 "anyhow",
- "clap 4.0.29",
+ "clap 4.0.32",
 "codegen",
 "itertools",
 "libcst",
@@ -1927,11 +1962,12 @@ dependencies = [
 "serde_json",
 "strum",
 "strum_macros",
+ "textwrap",
 ]

 [[package]]
 name = "ruff_macros"
-version = "0.0.193"
+version = "0.0.207"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1947,9 +1983,9 @@ checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"

 [[package]]
 name = "rustix"
-version = "0.36.4"
+version = "0.36.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb93e85278e08bb5788653183213d3a60fc242b10cb9be96586f5a73dcb67c23"
+checksum = "a3807b5d10909833d3e9acd1eb5fb988f79376ff10fce42937de71a449c4c588"
 dependencies = [
 "bitflags",
 "errno",
@@ -1974,7 +2010,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
+source = "git+https://github.com/RustPython/RustPython.git?rev=71becd4059fdce4bce7010f1208ed3b1c883abba#71becd4059fdce4bce7010f1208ed3b1c883abba"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -1984,7 +2020,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
+source = "git+https://github.com/RustPython/RustPython.git?rev=71becd4059fdce4bce7010f1208ed3b1c883abba#71becd4059fdce4bce7010f1208ed3b1c883abba"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -2007,7 +2043,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
+source = "git+https://github.com/RustPython/RustPython.git?rev=71becd4059fdce4bce7010f1208ed3b1c883abba#71becd4059fdce4bce7010f1208ed3b1c883abba"
 dependencies = [
 "bincode",
 "bitflags",
@@ -2024,7 +2060,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
+source = "git+https://github.com/RustPython/RustPython.git?rev=71becd4059fdce4bce7010f1208ed3b1c883abba#71becd4059fdce4bce7010f1208ed3b1c883abba"
 dependencies = [
 "ahash",
 "anyhow",
@@ -2048,15 +2084,15 @@ dependencies = [

 [[package]]
 name = "rustversion"
-version = "1.0.9"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97477e48b4cf8603ad5f7aaf897467cf42ab4218a38ef76fb14c2d6773a6d6a8"
+checksum = "5583e89e108996506031660fe09baa5011b9dd0341b89029313006d1fb508d70"

 [[package]]
 name = "ryu"
-version = "1.0.11"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+checksum = "7b4b9743ed687d4b4bcedf9ff5eaa7398495ae14e61cba0a295704edbc7decde"

 [[package]]
 name = "same-file"
@@ -2091,6 +2127,12 @@ dependencies = [
 "syn",
 ]

+[[package]]
+name = "scoped-tls"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -2099,9 +2141,9 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"

 [[package]]
 name = "scratch"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8132065adcfd6e02db789d9285a0deb2f3fcb04002865ab67d5fb103533898"
+checksum = "ddccb15bcce173023b3fedd9436f882a0739b8dfb45e4f6b6002bee5929f61b2"

 [[package]]
 name = "sct"
@@ -2115,24 +2157,35 @@ dependencies = [

 [[package]]
 name = "semver"
-version = "1.0.14"
+version = "1.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
+checksum = "58bc9567378fc7690d6b2addae4e60ac2eeea07becb2c64b9f218b53865cba2a"

 [[package]]
 name = "serde"
-version = "1.0.148"
+version = "1.0.151"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e53f64bb4ba0191d6d0676e1b141ca55047d83b74f5607e6d8eb88126c52c2dc"
+checksum = "97fed41fc1a24994d044e6db6935e69511a1153b52c15eb42493b26fa87feba0"
 dependencies = [
 "serde_derive",
 ]

 [[package]]
-name = "serde_derive"
-version = "1.0.148"
+name = "serde-wasm-bindgen"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a55492425aa53521babf6137309e7d34c20bbfbbfcfe2c7f3a047fd1f6b92c0c"
+checksum = "e3b4c031cd0d9014307d82b8abf653c0290fbdaeb4c02d00c63cf52f728628bf"
+dependencies = [
+ "js-sys",
+ "serde",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.151"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "255abe9a125a985c05190d687b320c12f9b1f0b99445e608c21ba0782c719ad8"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2208,9 +2261,9 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"

 [[package]]
 name = "str_indices"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d9199fa80c817e074620be84374a520062ebac833f358d74b37060ce4a0f2c0"
+checksum = "5f026164926842ec52deb1938fae44f83dfdb82d0a5b0270c5bd5935ab74d6dd"

 [[package]]
 name = "string_cache"
@@ -2255,9 +2308,9 @@ dependencies = [

 [[package]]
 name = "syn"
-version = "1.0.105"
+version = "1.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
+checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2362,18 +2415,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.37"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10deb33631e3c9018b9baf9dcbbc4f737320d2b576bac10f6aefa048fa407e3e"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.37"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "982d17546b47146b28f7c22e3d08465f6b8903d0ea13c1660d9d84a6e7adcdbb"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2447,9 +2500,9 @@ dependencies = [

 [[package]]
 name = "toml"
-version = "0.5.9"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d82e1a7758622a465f8cee077614c73484dac5b836c02ff6a40d5d1010324d7"
+checksum = "1333c76748e868a4d9d1017b5ab53171dfd095f70c712fdb4653a406547f598f"
 dependencies = [
 "serde",
 ]
@@ -2536,9 +2589,9 @@ checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"

 [[package]]
 name = "unicode-ident"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"

 [[package]]
 name = "unicode-linebreak"
@@ -2707,6 +2760,18 @@ dependencies = [
 "wasm-bindgen-shared",
 ]

+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23639446165ca5a5de86ae1d8896b737ae80319560fbaa4c2887b7da6e7ebd7d"
+dependencies = [
+ "cfg-if 1.0.0",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.83"
@@ -2736,6 +2801,30 @@ version = "0.2.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1c38c045535d93ec4f0b4defec448e4291638ee608530863b1e2ba115d4fff7f"

+[[package]]
+name = "wasm-bindgen-test"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d2fff962180c3fadf677438054b1db62bee4aa32af26a45388af07d1287e1d"
+dependencies = [
+ "console_error_panic_hook",
+ "js-sys",
+ "scoped-tls",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-bindgen-test-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-test-macro"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4683da3dfc016f704c9f82cf401520c4f1cb3ee440f7f52b3d6ac29506a49ca7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
 [[package]]
 name = "web-sys"
 version = "0.3.60"
@@ -2758,9 +2847,9 @@ dependencies = [

 [[package]]
 name = "webpki-roots"
-version = "0.22.5"
+version = "0.22.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "368bfe657969fb01238bb756d351dcade285e0f6fcbd36dcb23359a5169975be"
+checksum = "b6c71e40d7d2c34a5106301fb632274ca37242cd0c9d3e64dbece371a40a2d87"
 dependencies = [
 "webpki",
 ]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,12 +6,19 @@ members = [

 [package]
 name = "ruff"
-version = "0.0.193"
+version = "0.0.207"
+authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 edition = "2021"
 rust-version = "1.65.0"
+documentation = "https://github.com/charliermarsh/ruff"
+homepage = "https://github.com/charliermarsh/ruff"
+repository = "https://github.com/charliermarsh/ruff"
+readme = "README.md"
+license = "MIT"

 [lib]
 name = "ruff"
+crate-type = ["cdylib", "rlib"]

 [dependencies]
 annotate-snippets = { version = "0.9.1", features = ["color"] }
@@ -20,9 +27,10 @@ atty = { version = "0.2.14" }
 bincode = { version = "1.3.3" }
 bitflags = { version = "1.3.2" }
 cachedir = { version = "0.3.0" }
+cfg-if = { version = "1.0.0" }
 chrono = { version = "0.4.21", default-features = false, features = ["clock"] }
 clap = { version = "4.0.1", features = ["derive"] }
-clap_complete_command = "0.4.0"
+clap_complete_command = { version = "0.4.0" }
 colored = { version = "2.0.0" }
 common-path = { version = "1.0.0" }
 dirs = { version = "4.0.0" }
@@ -34,46 +42,57 @@ ignore = { version = "0.4.18" }
 itertools = { version = "0.10.5" }
 libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "f2f0b7a487a8725d161fe8b3ed73a6758b21e177" }
 log = { version = "0.4.17" }
+natord = { version = "1.0.9" }
 nohash-hasher = { version = "0.2.0" }
 notify = { version = "5.0.0" }
 num-bigint = { version = "0.4.3" }
 once_cell = { version = "1.16.0" }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
 quick-junit = { version = "0.3.2" }
-rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
 ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
-ruff_macros = { version = "0.0.193", path = "ruff_macros" }
+ruff_macros = { version = "0.0.207", path = "ruff_macros" }
 rustc-hash = { version = "1.1.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "1b6cb170e925a43d605b3fed9f6b878e63e47744" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "1b6cb170e925a43d605b3fed9f6b878e63e47744" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "1b6cb170e925a43d605b3fed9f6b878e63e47744" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "71becd4059fdce4bce7010f1208ed3b1c883abba" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "71becd4059fdce4bce7010f1208ed3b1c883abba" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "71becd4059fdce4bce7010f1208ed3b1c883abba" }
 schemars = { version = "0.8.11" }
+semver = { version = "1.0.16" }
 serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.87" }
 shellexpand = { version = "3.0.0" }
+similar = { version = "2.2.1" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
 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 }
 walkdir = { version = "2.3.2" }

 [target.'cfg(not(target_family = "wasm"))'.dependencies]
-clearscreen = { version = "1.0.10" } # uses which
+clearscreen = { version = "1.0.10" }
+rayon = { version = "1.5.3" }
+update-informer = { version = "0.5.0", default-features = false, features = ["pypi"], optional = true }

 # https://docs.rs/getrandom/0.2.7/getrandom/#webassembly-support
 # For (future) wasm-pack support
 [target.'cfg(all(target_family = "wasm", target_os = "unknown"))'.dependencies]
 getrandom = { version = "0.2.7", features = ["js"] }
+console_error_panic_hook = { version = "0.1.7" }
+console_log = { version = "0.2.0" }
+serde-wasm-bindgen = { version = "0.4" }
+js-sys = { version = "0.3.60" }
+wasm-bindgen = { version = "0.2.83" }

 [dev-dependencies]
-assert_cmd = { version = "2.0.4" }
-criterion = { version = "0.4.0" }
 insta = { version = "1.19.1", features = ["yaml"] }
 test-case = { version = "2.2.2" }
 ureq = { version = "2.5.0", features = [] }
+wasm-bindgen-test = { version = "0.3.33" }
+
+[target.'cfg(not(target_family = "wasm"))'.dev-dependencies]
+assert_cmd = { version = "2.0.4" }
+criterion = { version = "0.4.0" }

 [features]
 default = ["update-informer"]
@@ -91,6 +110,11 @@ opt-level = 3
 [profile.dev.package.similar]
 opt-level = 3

+# Reduce complexity of a parser function that would trigger a locals limit in a wasm tool.
+# https://github.com/bytecodealliance/wasm-tools/blob/b5c3d98e40590512a3b12470ef358d5c7b983b15/crates/wasmparser/src/limits.rs#L29
+[profile.dev.package.rustpython-parser]
+opt-level = 1
+
 [[bench]]
 name = "source_code_locator"
 harness = false
--- a/25
+++ b/25
@@ -388,6 +388,31 @@ are:
    SOFTWARE.
  """

+- flake8-implicit-str-concat, licensed as follows:
+  """
+    The MIT License (MIT)
+
+    Copyright (c) 2019 Dylan Turner
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
 - flake8-import-conventions, licensed as follows:
  """
    MIT License
--- a/README.md
+++ b/README.md
@@ -8,7 +8,11 @@
 An extremely fast Python linter, written in Rust.

 <p align="center">
-  <img alt="Bar chart with benchmark results" src="https://user-images.githubusercontent.com/1309177/187504482-6d9df992-a81d-4e86-9f6a-d958741c8182.svg">
+  <picture align="center">
+    <source media="(prefers-color-scheme: dark)" srcset="https://user-images.githubusercontent.com/1309177/210156880-a97c2a0d-2c03-4393-8695-36547935a94e.svg">
+    <source media="(prefers-color-scheme: light)" srcset="https://user-images.githubusercontent.com/1309177/210156881-a88fd142-5008-4695-9407-d028cec3eff7.svg">
+    <img alt="Shows a bar chart with benchmark results." src="https://user-images.githubusercontent.com/1309177/210156881-a88fd142-5008-4695-9407-d028cec3eff7.svg">
+  </picture>
 </p>

 <p align="center">
@@ -23,15 +27,20 @@ An extremely fast Python linter, written in Rust.
 - 🔧  Autofix support, for automatic error correction (e.g., automatically remove unused imports)
 - ⚖️  [Near-parity](#how-does-ruff-compare-to-flake8) with the built-in Flake8 rule set
 - 🔌  Native re-implementations of popular Flake8 plugins, like [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/)
+- 🌎  Monorepo-friendly configuration via hierarchical and cascading settings

 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), [`isort`](https://pypi.org/project/isort/), [`pydocstyle`](https://pypi.org/project/pydocstyle/),
-[`yesqa`](https://github.com/asottile/yesqa), [`eradicate`](https://pypi.org/project/eradicate/),
-and even a subset of [`pyupgrade`](https://pypi.org/project/pyupgrade/) and [`autoflake`](https://pypi.org/project/autoflake/)
-all while executing tens or hundreds of times faster than any individual tool. Ruff goes beyond the
-responsibilities of a traditional linter, instead functioning as an advanced code transformation
-tool capable of upgrading type annotations, rewriting class definitions, sorting imports, and more.
+functionality behind a single, common interface.
+
+Ruff can be used to replace Flake8 (plus a variety of plugins), [`isort`](https://pypi.org/project/isort/),
+[`pydocstyle`](https://pypi.org/project/pydocstyle/), [`yesqa`](https://github.com/asottile/yesqa),
+[`eradicate`](https://pypi.org/project/eradicate/), [`pyupgrade`](https://pypi.org/project/pyupgrade/),
+and [`autoflake`](https://pypi.org/project/autoflake/), all while executing tens or hundreds of
+times faster than any individual tool.
+
+Ruff goes beyond the responsibilities of a traditional linter, instead functioning as an advanced
+code transformation tool capable of upgrading type annotations, rewriting class definitions, sorting
+imports, and more.

 Ruff is extremely actively developed and used in major open-source projects like:

@@ -39,6 +48,7 @@ Ruff is extremely actively developed and used in major open-source projects like
 - [Bokeh](https://github.com/bokeh/bokeh)
 - [Zulip](https://github.com/zulip/zulip)
 - [Pydantic](https://github.com/pydantic/pydantic)
+- [Sphinx](https://github.com/sphinx-doc/sphinx)
 - [Hatch](https://github.com/pypa/hatch)
 - [Jupyter](https://github.com/jupyter-server/jupyter_server)
 - [Synapse](https://github.com/matrix-org/synapse)
@@ -89,6 +99,7 @@ of [Conda](https://docs.conda.io/en/latest/):
   1. [flake8-comprehensions (C4)](#flake8-comprehensions-c4)
   1. [flake8-debugger (T10)](#flake8-debugger-t10)
   1. [flake8-errmsg (EM)](#flake8-errmsg-em)
+   1. [flake8-implicit-str-concat (ISC)](#flake8-implicit-str-concat-isc)
   1. [flake8-import-conventions (ICN)](#flake8-import-conventions-icn)
   1. [flake8-print (T20)](#flake8-print-t20)
   1. [flake8-quotes (Q)](#flake8-quotes-q)
@@ -146,9 +157,9 @@ pacman -S ruff
 To run Ruff, try any of the following:

 ```shell
-ruff path/to/code/to/check.py
-ruff path/to/code/
-ruff path/to/code/*.py
+ruff path/to/code/to/check.py  # Run Ruff over `check.py`
+ruff path/to/code/             # Run Ruff over all files in `/path/to/code` (and any subdirectories)
+ruff path/to/code/*.py         # Run Ruff over all `.py` files in `/path/to/code`
 ```

 You can run Ruff in `--watch` mode to automatically re-run on-change:
@@ -162,7 +173,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 - repo: https://github.com/charliermarsh/ruff-pre-commit
  # Ruff version.
-  rev: 'v0.0.193'
+  rev: 'v0.0.207'
  hooks:
    - id: ruff
      # Respect `exclude` and `extend-exclude` settings.
@@ -214,21 +225,14 @@ dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
 # Assume Python 3.10.
 target-version = "py310"

-[tool.ruff.flake8-import-conventions.aliases]
-altair = "alt"
-"matplotlib.pyplot" = "plt"
-numpy = "np"
-pandas = "pd"
-seaborn = "sns"
-
 [tool.ruff.mccabe]
 # Unlike Flake8, default to a complexity level of 10.
 max-complexity = 10
 ```

 As an example, the following would configure Ruff to: (1) avoid checking for line-length
-violations (`E501`); (2), always autofix, but never remove unused imports (`F401`); and (3) ignore
-import-at-top-of-file errors (`E402`) in `__init__.py` files:
+violations (`E501`); (2) never remove unused imports (`F401`); and (3) ignore import-at-top-of-file
+errors (`E402`) in `__init__.py` files:

 ```toml
 [tool.ruff]
@@ -238,8 +242,7 @@ select = ["E", "F"]
 # Never enforce `E501` (line length violations).
 ignore = ["E501"]

-# Always autofix, but never try to fix `F401` (unused imports).
-fix = true
+# Never try to fix `F401` (unused imports).
 unfixable = ["F401"]

 # Ignore `E402` (import violations) in all `__init__.py` files, and in `path/to/file.py`.
@@ -259,6 +262,38 @@ select = ["E", "F", "Q"]
 docstring-quotes = "double"
 ```

+Ruff mirrors Flake8's error code system, in which each error code consists of a one-to-three letter
+prefix, followed by three digits (e.g., `F401`). The prefix indicates that "source" of the error
+code (e.g., `F` for Pyflakes, `E` for `pycodestyle`, `ANN` for `flake8-annotations`). The set of
+enabled errors is determined by the `select` and `ignore` options, which support both the full
+error code (e.g., `F401`) and the prefix (e.g., `F`).
+
+As a special-case, Ruff also supports the `ALL` error code, which enables all error codes. Note that
+some of the `pydocstyle` error codes are conflicting (e.g., `D203` and `D211`) as they represent
+alternative docstring formats. Enabling `ALL` without further configuration may result in suboptimal
+behavior, especially for the `pydocstyle` plugin.
+
+As an alternative to `pyproject.toml`, Ruff will also respect a `ruff.toml` file, which implements
+an equivalent schema (though the `[tool.ruff]` hierarchy can be omitted). For example, the above
+`pyproject.toml` described above would be represented via the following `ruff.toml`:
+
+```toml
+# Enable Pyflakes and pycodestyle rules.
+select = ["E", "F"]
+
+# Never enforce `E501` (line length violations).
+ignore = ["E501"]
+
+# Always autofix, but never try to fix `F401` (unused imports).
+fix = true
+unfixable = ["F401"]
+
+# Ignore `E402` (import violations) in all `__init__.py` files, and in `path/to/file.py`.
+[per-file-ignores]
+"__init__.py" = ["E402"]
+"path/to/file.py" = ["E402"]
+```
+
 For a full list of configurable options, see the [API reference](#reference).

 Some common configuration settings can be provided via the command-line:
@@ -269,6 +304,7 @@ ruff path/to/code/ --select F401 --select F403

 See `ruff --help` for more:

+<!-- Begin auto-generated cli help. -->
 ```shell
 Ruff: An extremely fast Python linter.

@@ -279,7 +315,7 @@ Arguments:

 Options:
      --config <CONFIG>
-          Path to the `pyproject.toml` file to use for configuration
+          Path to the `pyproject.toml` or `ruff.toml` file to use for configuration
  -v, --verbose
          Enable verbose logging
  -q, --quiet
@@ -292,14 +328,18 @@ Options:
          Run in watch mode by re-running whenever files change
      --fix
          Attempt to automatically fix lint errors
+      --fix-only
+          Fix any fixable lint errors, but don't report on leftover violations. Implies `--fix`
+      --diff
+          Avoid writing any fixed files back; instead, output a diff for each changed file to stdout
  -n, --no-cache
          Disable cache reads
      --select <SELECT>
-          List of error codes to enable
+          Comma-separated list of error codes to enable (or ALL, to enable all checks)
      --extend-select <EXTEND_SELECT>
          Like --select, but adds additional error codes on top of the selected ones
      --ignore <IGNORE>
-          List of error codes to ignore
+          Comma-separated list of error codes to disable
      --extend-ignore <EXTEND_IGNORE>
          Like --ignore, but adds additional error codes on top of the ignored ones
      --exclude <EXCLUDE>
@@ -313,19 +353,19 @@ Options:
      --per-file-ignores <PER_FILE_IGNORES>
          List of mappings from file pattern to code to exclude
      --format <FORMAT>
-          Output serialization format for error messages [possible values: text, json, junit, grouped, github]
+          Output serialization format for error messages [possible values: text, json, junit, grouped, github, gitlab]
+      --stdin-filename <STDIN_FILENAME>
+          The name of the file when passing it through stdin
+      --cache-dir <CACHE_DIR>
+          Path to the cache directory
      --show-source
          Show violations with source code
      --respect-gitignore
          Respect file exclusions via `.gitignore` and other standard ignore files
      --force-exclude
          Enforce exclusions, even for paths passed to Ruff directly on the command-line
-      --show-files
-          See the files Ruff will be run against with the current settings
-      --show-settings
-          See the settings Ruff will use to check a given Python file
-      --add-noqa
-          Enable automatic additions of noqa directives to failing lines
+      --update-check
+          Enable or disable automatic update checks
      --dummy-variable-rgx <DUMMY_VARIABLE_RGX>
          Regular expression matching the name of dummy variables
      --target-version <TARGET_VERSION>
@@ -333,18 +373,23 @@ Options:
      --line-length <LINE_LENGTH>
          Set the line-length for length-associated checks and automatic formatting
      --max-complexity <MAX_COMPLEXITY>
-          Max McCabe complexity allowed for a function
-      --stdin-filename <STDIN_FILENAME>
-          The name of the file when passing it through stdin
+          Maximum McCabe complexity allowed for a given function
+      --add-noqa
+          Enable automatic additions of `noqa` directives to failing lines
+      --clean
+          Clear any caches in the current directory or any subdirectories
      --explain <EXPLAIN>
          Explain a rule
-      --cache-dir <CACHE_DIR>
-          Path to the cache directory
+      --show-files
+          See the files Ruff will be run against with the current settings
+      --show-settings
+          See the settings Ruff will use to check a given Python file
  -h, --help
          Print help information
  -V, --version
          Print version information
 ```
+<!-- End auto-generated cli help. -->

 ### `pyproject.toml` discovery

@@ -383,6 +428,9 @@ extend = "../pyproject.toml"
 line-length = 100
 ```

+All of the above rules apply equivalently to `ruff.toml` files. If Ruff detects both a `ruff.toml`
+and `pyproject.toml` file, it will defer to the `ruff.toml`.
+
 ### Python file discovery

 When passed a path on the command-line, Ruff will automatically discover all Python files in that
@@ -501,7 +549,7 @@ 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 `==` 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 |  |
@@ -514,7 +562,6 @@ For more, see [Pyflakes](https://pypi.org/project/pyflakes/2.5.0/) on PyPI.
 | F821 | UndefinedName | Undefined name `...` |  |
 | F822 | UndefinedExport | Undefined name `...` in `__all__` |  |
 | F823 | UndefinedLocal | Local variable `...` referenced before assignment |  |
-| F831 | DuplicateArgumentName | Duplicate argument name in function definition |  |
 | F841 | UnusedVariable | Local variable `...` is assigned to but never used |  |
 | F842 | UnusedAnnotation | Local variable `...` is annotated but never used |  |
 | F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` | 🛠 |
@@ -534,7 +581,7 @@ For more, see [pycodestyle](https://pypi.org/project/pycodestyle/2.9.1/) on PyPI
 | E714 | NotIsTest | Test for object identity should be `is not` | 🛠 |
 | E721 | TypeComparison | Do not compare types, use `isinstance()` |  |
 | E722 | DoNotUseBareExcept | Do not use bare `except` |  |
-| E731 | DoNotAssignLambda | Do not assign a lambda expression, use a def | 🛠 |
+| E731 | DoNotAssignLambda | Do not assign a `lambda` expression, use a `def` | 🛠 |
 | E741 | AmbiguousVariableName | Ambiguous variable name: `...` |  |
 | E742 | AmbiguousClassName | Ambiguous class name: `...` |  |
 | E743 | AmbiguousFunctionName | Ambiguous function name: `...` |  |
@@ -619,8 +666,8 @@ For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
 | ---- | ---- | ------- | --- |
 | UP001 | UselessMetaclassType | `__metaclass__ = type` is implied | 🛠 |
 | UP003 | TypeOfPrimitive | Use `str` instead of `type(...)` | 🛠 |
-| UP004 | UselessObjectInheritance | Class `...` inherits from object | 🛠 |
-| UP005 | DeprecatedUnittestAlias | `assertEquals` is deprecated, use `assertEqual` instead | 🛠 |
+| UP004 | UselessObjectInheritance | Class `...` inherits from `object` | 🛠 |
+| UP005 | DeprecatedUnittestAlias | `assertEquals` is deprecated, use `assertEqual` | 🛠 |
 | UP006 | UsePEP585Annotation | Use `list` instead of `List` for type annotations | 🛠 |
 | UP007 | UsePEP604Annotation | Use `X \| Y` for type annotations | 🛠 |
 | UP008 | SuperCallWithParameters | Use `super()` instead of `super(__class__, self)` | 🛠 |
@@ -633,7 +680,16 @@ For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
 | UP015 | RedundantOpenModes | Unnecessary open mode parameters | 🛠 |
 | UP016 | RemoveSixCompat | Unnecessary `six` compatibility usage | 🛠 |
 | UP017 | DatetimeTimezoneUTC | Use `datetime.UTC` alias | 🛠 |
-| UP018 | NativeLiterals | Unnecessary call to `str` and `bytes` | 🛠 |
+| UP018 | NativeLiterals | Unnecessary call to `str` | 🛠 |
+| UP019 | TypingTextStrAlias | `typing.Text` is deprecated, use `str` | 🛠 |
+| UP020 | OpenAlias | Use builtin `open` | 🛠 |
+| UP021 | ReplaceUniversalNewlines | `universal_newlines` is deprecated, use `text` | 🛠 |
+| UP022 | ReplaceStdoutStderr | Sending stdout and stderr to pipe is deprecated, use `capture_output` | 🛠 |
+| UP023 | RewriteCElementTree | `cElementTree` is deprecated, use `ElementTree` | 🛠 |
+| UP024 | OSErrorAlias | Replace aliased errors with `OSError` | 🛠 |
+| UP025 | RewriteUnicodeLiteral | Remove unicode literals from strings | 🛠 |
+| UP026 | RewriteMockImport | `mock` is deprecated, use `unittest.mock` | 🛠 |
+| UP027 | RewriteListComprehension | Replace unpacked list comprehension with a generator expression | 🛠 |

 ### pep8-naming (N)

@@ -809,6 +865,16 @@ For more, see [flake8-errmsg](https://pypi.org/project/flake8-errmsg/0.4.0/) on
 | EM102 | FStringInException | Exception must not use an f-string literal, assign to variable first |  |
 | EM103 | DotFormatInException | Exception must not use a `.format()` string directly, assign to variable first |  |

+### flake8-implicit-str-concat (ISC)
+
+For more, see [flake8-implicit-str-concat](https://pypi.org/project/flake8-implicit-str-concat/0.3.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| ISC001 | SingleLineImplicitStringConcatenation | Implicitly concatenated string literals on one line |  |
+| ISC002 | MultiLineImplicitStringConcatenation | Implicitly concatenated string literals over continuation line |  |
+| ISC003 | ExplicitStringConcatenation | Explicitly concatenated string should be implicitly concatenated |  |
+
 ### flake8-import-conventions (ICN)

 | Code | Name | Message | Fix |
@@ -857,6 +923,7 @@ For more, see [flake8-simplify](https://pypi.org/project/flake8-simplify/0.19.3/
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | SIM118 | KeyInDict | Use `key in dict` instead of `key in dict.keys()` | 🛠 |
+| SIM300 | YodaConditions | Use `left == right` instead of `right == left (Yoda-conditions)` |  |

 ### flake8-tidy-imports (TID)

@@ -864,6 +931,7 @@ For more, see [flake8-tidy-imports](https://pypi.org/project/flake8-tidy-imports

 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
+| TID251 | BannedApi | `...` is banned: ... |  |
 | TID252 | BannedRelativeImport | Relative imports are banned |  |

 ### flake8-unused-arguments (ARG)
@@ -930,6 +998,7 @@ For more, see [pygrep-hooks](https://github.com/pre-commit/pygrep-hooks) on GitH
 | PGH001 | NoEval | No builtin `eval()` allowed |  |
 | PGH002 | DeprecatedLogWarn | `warn` is deprecated in favor of `warning` |  |
 | PGH003 | BlanketTypeIgnore | Use specific error codes when ignoring type issues |  |
+| PGH004 | BlanketNOQA | Use specific error codes when using `noqa` |  |

 ### Pylint (PLC, PLE, PLR, PLW)

@@ -956,7 +1025,8 @@ For more, see [Pylint](https://pypi.org/project/pylint/2.15.7/) on PyPI.
 | ---- | ---- | ------- | --- |
 | 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'?) |  |
+| RUF003 | AmbiguousUnicodeCharacterComment | Comment contains ambiguous unicode character '𝐁' (did you mean 'B'?) | 🛠 |
+| RUF004 | KeywordArgumentBeforeStarArgument | Keyword argument `...` must come after starred arguments |  |
 | RUF100 | UnusedNOQA | Unused blanket `noqa` directive | 🛠 |

 <!-- End auto-generated sections. -->
@@ -1226,10 +1296,12 @@ natively, including:
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-eradicate`](https://pypi.org/project/flake8-eradicate/)
 - [`flake8-errmsg`](https://pypi.org/project/flake8-errmsg/)
+- [`flake8-implicit-str-concat`](https://pypi.org/project/flake8-implicit-str-concat/)
 - [`flake8-import-conventions`](https://github.com/joaopalmeiro/flake8-import-conventions)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-return`](https://pypi.org/project/flake8-return/)
+- [`flake8-simplify`](https://pypi.org/project/flake8-simplify/) (1/37)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`isort`](https://pypi.org/project/isort/)
@@ -1237,7 +1309,7 @@ natively, including:
 - [`pep8-naming`](https://pypi.org/project/pep8-naming/)
 - [`pydocstyle`](https://pypi.org/project/pydocstyle/)
 - [`pygrep-hooks`](https://github.com/pre-commit/pygrep-hooks) (3/10)
- [`pyupgrade`](https://pypi.org/project/pyupgrade/) (18/33)
+- [`pyupgrade`](https://pypi.org/project/pyupgrade/) (21/33)
 - [`yesqa`](https://github.com/asottile/yesqa)

 Note that, in some cases, Ruff uses different error code prefixes than would be found in the
@@ -1281,10 +1353,12 @@ Today, Ruff can be used to replace Flake8 when used with any of the following pl
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-eradicate`](https://pypi.org/project/flake8-eradicate/)
 - [`flake8-errmsg`](https://pypi.org/project/flake8-errmsg/)
+- [`flake8-implicit-str-concat`](https://pypi.org/project/flake8-implicit-str-concat/)
 - [`flake8-import-conventions`](https://github.com/joaopalmeiro/flake8-import-conventions)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-return`](https://pypi.org/project/flake8-return/)
+- [`flake8-simplify`](https://pypi.org/project/flake8-simplify/) (1/37)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`mccabe`](https://pypi.org/project/mccabe/)
@@ -1294,7 +1368,7 @@ Today, Ruff can be used to replace Flake8 when used with any of the following pl
 Ruff can also replace [`isort`](https://pypi.org/project/isort/),
 [`yesqa`](https://github.com/asottile/yesqa), [`eradicate`](https://pypi.org/project/eradicate/),
 [`pygrep-hooks`](https://github.com/pre-commit/pygrep-hooks) (3/10), and a subset of the rules
-implemented in [`pyupgrade`](https://pypi.org/project/pyupgrade/) (17/33).
+implemented in [`pyupgrade`](https://pypi.org/project/pyupgrade/) (21/33).

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

@@ -1341,6 +1415,22 @@ src = ["src", "tests"]
 known-first-party = ["my_module1", "my_module2"]
 ```

+### Does Ruff support Jupyter Notebooks?
+
+Ruff is integrated into [nbQA](https://github.com/nbQA-dev/nbQA), a tool for running linters and
+code formatters over Jupyter Notebooks.
+
+After installing `ruff` and `nbqa`, you can run Ruff over a notebook like so:
+
+```shell
+> nbqa ruff Untitled.ipynb
+Untitled.ipynb:cell_1:2:5: F841 Local variable `x` is assigned to but never used
+Untitled.ipynb:cell_2:1:1: E402 Module level import not at top of file
+Untitled.ipynb:cell_2:1:8: F401 `os` imported but unused
+Found 3 error(s).
+1 potentially fixable with the --fix option.
+```
+
 ### Does Ruff support NumPy- or Google-style docstrings?

 Yes! To enable a specific docstring convention, start by enabling all `pydocstyle` error codes, and
@@ -1411,6 +1501,18 @@ extend-ignore = [
 ]
 ```

+Note that Ruff _also_ supports a [`convention`](#convention) setting:
+
+```toml
+[tool.ruff.pydocstyle]
+convention = "google"
+```
+
+However, this setting is purely used to implement robust detection of Google and NumPy-style
+sections, and thus avoid the [false negatives](https://github.com/PyCQA/pydocstyle/issues/459) seen
+in `pydocstyle`; it does not affect which errors are enabled, which is driven by the `select` and
+`ignore` settings, as described above.
+
 ## Development

 Ruff is written in Rust (1.65.0). You'll need to install the [Rust toolchain](https://www.rust-lang.org/tools/install)
@@ -1426,8 +1528,8 @@ For development, we use [nightly Rust](https://rust-lang.github.io/rustup/concep

 ```shell
 cargo +nightly fmt
-cargo +nightly clippy
-cargo +nightly test
+cargo +nightly clippy --fix --workspace --all-targets --all-features -- -W clippy::pedantic
+cargo +nightly test --all
 ```

 ## Releases
@@ -1578,7 +1680,6 @@ Summary

 <!-- Sections automatically generated by `cargo dev generate-options`. -->
 <!-- Begin auto-generated options sections. -->
-
 #### [`allowed-confusables`](#allowed-confusables)

 A list of allowed "confusable" Unicode characters to ignore when
@@ -1798,6 +1899,23 @@ fix = true

 ---

+#### [`fix-only`](#fix-only)
+
+Like `fix`, but disables reporting on leftover violation. Implies `fix`.
+
+**Default value**: `false`
+
+**Type**: `bool`
+
+**Example usage**:
+
+```toml
+[tool.ruff]
+fix-only = true
+```
+
+---
+
 #### [`fixable`](#fixable)

 A list of check code prefixes to consider autofix-able.
@@ -1846,8 +1964,9 @@ force-exclude = true

 The style in which violation messages should be formatted: `"text"`
 (default), `"grouped"` (group messages by file), `"json"`
-(machine-readable), `"junit"` (machine-readable XML), or `"github"`
-(GitHub Actions annotations).
+(machine-readable), `"junit"` (machine-readable XML), `"github"`
+(GitHub Actions annotations) or `"gitlab"`
+(GitLab CI code quality report).

 **Default value**: `"text"`

@@ -1948,6 +2067,25 @@ when considering any matching files.

 ---

+#### [`required-version`](#required-version)
+
+Require a specific version of Ruff to be running (useful for unifying
+results across many environments, e.g., with a `pyproject.toml`
+file).
+
+**Default value**: `None`
+
+**Type**: `String`
+
+**Example usage**:
+
+```toml
+[tool.ruff]
+required-version = "0.0.193"
+```
+
+---
+
 #### [`respect-gitignore`](#respect-gitignore)

 Whether to automatically exclude files that are ignored by `.ignore`,
@@ -2090,6 +2228,24 @@ unfixable = ["F401"]

 ---

+#### [`update-check`](#update-check)
+
+Enable or disable automatic update checks (overridden by the
+`--update-check` and `--no-update-check` command-line flags).
+
+**Default value**: `true`
+
+**Type**: `bool`
+
+**Example usage**:
+
+```toml
+[tool.ruff]
+update-check = false
+```
+
+---
+
 ### `flake8-annotations`

 #### [`allow-star-arg-any`](#allow-star-arg-any)
@@ -2333,7 +2489,7 @@ multiline-quotes = "single"
 #### [`ban-relative-imports`](#ban-relative-imports)

 Whether to ban all relative imports (`"all"`), or only those imports
-that extend into the parent module and beyond (`"parents"`).
+that extend into the parent module or beyond (`"parents"`).

 **Default value**: `"parents"`

@@ -2349,6 +2505,27 @@ ban-relative-imports = "all"

 ---

+#### [`banned-api`](#banned-api)
+
+Specific modules or module members that may not be imported or accessed.
+Note that this check is only meant to flag accidental uses,
+and can be circumvented via `eval` or `importlib`.
+
+**Default value**: `{}`
+
+**Type**: `HashMap<String, BannedApi>`
+
+**Example usage**:
+
+```toml
+[tool.ruff.flake8-tidy-imports]
+[tool.ruff.flake8-tidy-imports.banned-api]
+"cgi".msg = "The cgi module is deprecated, see https://peps.python.org/pep-0594/#cgi."
+"typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+```
+
+---
+
 ### `flake8-unused-arguments`

 #### [`ignore-variadic-names`](#ignore-variadic-names)
@@ -2406,6 +2583,23 @@ extra-standard-library = ["path"]

 ---

+#### [`force-single-line`](#force-single-line)
+
+Forces all from imports to appear on their own line.
+
+**Default value**: `false`
+
+**Type**: `bool`
+
+**Example usage**:
+
+```toml
+[tool.ruff.isort]
+force-single-line = true
+```
+
+---
+
 #### [`force-wrap-aliases`](#force-wrap-aliases)

 Force `import from` statements with multiple members and at least one
@@ -2475,6 +2669,43 @@ known-third-party = ["src"]

 ---

+#### [`single-line-exclusions`](#single-line-exclusions)
+
+One or more modules to exclude from the single line rule.
+
+**Default value**: `[]`
+
+**Type**: `Vec<String>`
+
+**Example usage**:
+
+```toml
+[tool.ruff.isort]
+single-line-exclusions = ["os", "json"]
+```
+
+---
+
+#### [`split-on-trailing-comma`](#split-on-trailing-comma)
+
+If a comma is placed after the last member in a multi-line import, then
+the imports will never be folded into one line.
+
+See isort's [`split-on-trailing-comma`](https://pycqa.github.io/isort/docs/configuration/options.html#split-on-trailing-comma) option.
+
+**Default value**: `true`
+
+**Type**: `bool`
+
+**Example usage**:
+
+```toml
+[tool.ruff.isort]
+split-on-trailing-comma = false
+```
+
+---
+
 ### `mccabe`

 #### [`max-complexity`](#max-complexity)
@@ -2556,6 +2787,28 @@ staticmethod-decorators = ["staticmethod", "stcmthd"]

 ---

+### `pydocstyle`
+
+#### [`convention`](#convention)
+
+Whether to use Google-style or Numpy-style conventions when detecting
+docstring sections. By default, conventions will be inferred from
+the available sections.
+
+**Default value**: `None`
+
+**Type**: `Convention`
+
+**Example usage**:
+
+```toml
+[tool.ruff.pydocstyle]
+# Use Google-style docstrings.
+convention = "google"
+```
+
+---
+
 ### `pyupgrade`

 #### [`keep-runtime-typing`](#keep-runtime-typing)
--- a/flake8_to_ruff/Cargo.lock
+++ b/flake8_to_ruff/Cargo.lock
@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.193"
+version = "0.0.207"
 dependencies = [
 "anyhow",
 "clap",
@@ -1975,7 +1975,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.193"
+version = "0.0.207"
 dependencies = [
 "anyhow",
 "bincode",
--- a/flake8_to_ruff/Cargo.toml
+++ b/flake8_to_ruff/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.193-dev.0"
+version = "0.0.207-dev.0"
 edition = "2021"

 [lib]
--- a/flake8_to_ruff/src/converter.rs
+++ b/flake8_to_ruff/src/converter.rs
@@ -4,11 +4,12 @@ use anyhow::Result;
 use ruff::checks_gen::CheckCodePrefix;
 use ruff::flake8_quotes::settings::Quote;
 use ruff::flake8_tidy_imports::settings::Strictness;
+use ruff::pydocstyle::settings::Convention;
 use ruff::settings::options::Options;
 use ruff::settings::pyproject::Pyproject;
 use ruff::{
    flake8_annotations, flake8_bugbear, flake8_errmsg, flake8_quotes, flake8_tidy_imports, mccabe,
-    pep8_naming,
+    pep8_naming, pydocstyle,
 };

 use crate::black::Black;
@@ -91,6 +92,7 @@ pub fn convert(
    let mut flake8_tidy_imports = flake8_tidy_imports::settings::Options::default();
    let mut mccabe = mccabe::settings::Options::default();
    let mut pep8_naming = pep8_naming::settings::Options::default();
+    let mut pydocstyle = pydocstyle::settings::Options::default();
    for (key, value) in flake8 {
        if let Some(value) = value {
            match key.as_str() {
@@ -162,17 +164,17 @@ pub fn convert(
                // flake8-quotes
                "quotes" | "inline-quotes" | "inline_quotes" => match value.trim() {
                    "'" | "single" => flake8_quotes.inline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Double),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                "multiline-quotes" | "multiline_quotes" => match value.trim() {
                    "'" | "single" => flake8_quotes.multiline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Double),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                "docstring-quotes" | "docstring_quotes" => match value.trim() {
                    "'" | "single" => flake8_quotes.docstring_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Double),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                "avoid-escape" | "avoid_escape" => match parser::parse_bool(value.as_ref()) {
@@ -200,9 +202,12 @@ pub fn convert(
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                // flake8-docstrings
-                "docstring-convention" => {
-                    // No-op (handled above).
-                }
+                "docstring-convention" => match value.trim() {
+                    "google" => pydocstyle.convention = Some(Convention::Google),
+                    "numpy" => pydocstyle.convention = Some(Convention::Numpy),
+                    "pep257" | "all" => pydocstyle.convention = None,
+                    _ => eprintln!("Unexpected '{key}' value: {value}"),
+                },
                // mccabe
                "max-complexity" | "max_complexity" => match value.clone().parse::<usize>() {
                    Ok(max_complexity) => mccabe.max_complexity = Some(max_complexity),
@@ -247,6 +252,9 @@ pub fn convert(
    if pep8_naming != pep8_naming::settings::Options::default() {
        options.pep8_naming = Some(pep8_naming);
    }
+    if pydocstyle != pydocstyle::settings::Options::default() {
+        options.pydocstyle = Some(pydocstyle);
+    }

    // Extract any settings from the existing `pyproject.toml`.
    if let Some(black) = black {
@@ -271,9 +279,10 @@ mod tests {

    use anyhow::Result;
    use ruff::checks_gen::CheckCodePrefix;
-    use ruff::flake8_quotes;
+    use ruff::pydocstyle::settings::Convention;
    use ruff::settings::options::Options;
    use ruff::settings::pyproject::Pyproject;
+    use ruff::{flake8_quotes, pydocstyle};

    use crate::converter::convert;
    use crate::plugin::Plugin;
@@ -287,6 +296,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -295,6 +305,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -302,6 +313,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -312,7 +324,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -323,6 +335,7 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -342,6 +355,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -350,6 +364,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -357,6 +372,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: Some(100),
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -367,7 +383,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -378,6 +394,7 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -397,6 +414,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -405,6 +423,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -412,6 +431,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: Some(100),
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -422,7 +442,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -433,6 +453,7 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -452,6 +473,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -460,6 +482,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -467,6 +490,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -477,7 +501,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -488,6 +512,7 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -507,6 +532,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -515,6 +541,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -522,6 +549,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -532,7 +560,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -548,6 +576,7 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -570,6 +599,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -578,6 +608,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -585,6 +616,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::D100,
@@ -631,7 +663,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -642,6 +674,9 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: Some(pydocstyle::settings::Options {
+                convention: Some(Convention::Numpy),
+            }),
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -661,6 +696,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -669,6 +705,7 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
            force_exclude: None,
@@ -676,6 +713,7 @@ mod tests {
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -687,7 +725,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -703,6 +741,7 @@ mod tests {
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
--- a/flake8_to_ruff/src/plugin.rs
+++ b/flake8_to_ruff/src/plugin.rs
@@ -16,16 +16,17 @@ pub enum Plugin {
    Flake8Datetimez,
    Flake8Debugger,
    Flake8Docstrings,
-    Flake8ErrMsg,
    Flake8Eradicate,
+    Flake8ErrMsg,
+    Flake8ImplicitStrConcat,
    Flake8Print,
    Flake8Quotes,
    Flake8Return,
    Flake8Simplify,
    Flake8TidyImports,
    McCabe,
-    PandasVet,
    PEP8Naming,
+    PandasVet,
    Pyupgrade,
 }

@@ -45,6 +46,7 @@ impl FromStr for Plugin {
            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
            "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
            "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
+            "flake8-implicit-str-concat" => Ok(Plugin::Flake8ImplicitStrConcat),
            "flake8-print" => Ok(Plugin::Flake8Print),
            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
            "flake8-return" => Ok(Plugin::Flake8Return),
@@ -76,14 +78,15 @@ impl fmt::Debug for Plugin {
                Plugin::Flake8Docstrings => "flake8-docstrings",
                Plugin::Flake8Eradicate => "flake8-eradicate",
                Plugin::Flake8ErrMsg => "flake8-errmsg",
+                Plugin::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
                Plugin::Flake8Print => "flake8-print",
                Plugin::Flake8Quotes => "flake8-quotes",
                Plugin::Flake8Return => "flake8-return",
                Plugin::Flake8Simplify => "flake8-simplify",
                Plugin::Flake8TidyImports => "flake8-tidy-imports",
                Plugin::McCabe => "mccabe",
-                Plugin::PandasVet => "pandas-vet",
                Plugin::PEP8Naming => "pep8-naming",
+                Plugin::PandasVet => "pandas-vet",
                Plugin::Pyupgrade => "pyupgrade",
            }
        )
@@ -106,6 +109,7 @@ impl Plugin {
            // TODO(charlie): Handle rename of `E` to `ERA`.
            Plugin::Flake8Eradicate => CheckCodePrefix::ERA,
            Plugin::Flake8ErrMsg => CheckCodePrefix::EM,
+            Plugin::Flake8ImplicitStrConcat => CheckCodePrefix::ISC,
            Plugin::Flake8Print => CheckCodePrefix::T2,
            Plugin::Flake8Quotes => CheckCodePrefix::Q,
            Plugin::Flake8Return => CheckCodePrefix::RET,
@@ -146,6 +150,7 @@ impl Plugin {
            }
            Plugin::Flake8Eradicate => vec![CheckCodePrefix::ERA],
            Plugin::Flake8ErrMsg => vec![CheckCodePrefix::EM],
+            Plugin::Flake8ImplicitStrConcat => vec![CheckCodePrefix::ISC],
            Plugin::Flake8Print => vec![CheckCodePrefix::T2],
            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
            Plugin::Flake8Return => vec![CheckCodePrefix::RET],
@@ -449,6 +454,7 @@ pub fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin
        Plugin::Flake8Docstrings,
        Plugin::Flake8Eradicate,
        Plugin::Flake8ErrMsg,
+        Plugin::Flake8ImplicitStrConcat,
        Plugin::Flake8Print,
        Plugin::Flake8Quotes,
        Plugin::Flake8Return,
--- a/playground/.eslintrc
+++ b/playground/.eslintrc
@@ -0,0 +1,25 @@
+{
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint", "prettier"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:react/recommended",
+    "plugin:react/jsx-runtime",
+    "plugin:react-hooks/recommended",
+    "plugin:import/recommended",
+    "plugin:import/typescript",
+    "plugin:prettier/recommended"
+  ],
+  "rules": {
+    // Disable some recommended rules that we don't want to enforce.
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-empty-function": "off"
+  },
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  }
+}
--- a/playground/.gitignore
+++ b/playground/.gitignore
@@ -0,0 +1,130 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
--- a/playground/.prettierrc.json
+++ b/playground/.prettierrc.json
@@ -0,0 +1,3 @@
+{
+  "trailingComma": "all"
+}
--- a/playground/README.md
+++ b/playground/README.md
@@ -0,0 +1,14 @@
+# playground
+
+In-browser playground for Ruff. Available [https://ruff.pages.dev/](https://ruff.pages.dev/).
+
+## Getting started
+
+- To build the WASM module, run `wasm-pack build --target web --out-dir playground/src/pkg` from the
+  root directory.
+- Install TypeScript dependencies with: `npm install`.
+- Start the development server with: `npm run dev`.
+
+## Implementation
+
+Design based on [Tailwind Play](https://play.tailwindcss.com/). Themed with [`ayu`](https://github.com/dempfi/ayu).
--- a/playground/index.html
+++ b/playground/index.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta
+      name="description"
+      content="An in-browser playground for Ruff, an extremely fast Python linter written in Rust."
+    />
+    <meta name="keywords" content="ruff, python, rust, webassembly, wasm" />
+    <title>Ruff Playground</title>
+    <link
+      rel="icon"
+      href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🛠️</text></svg>"
+    />
+    <link rel="stylesheet" href="https://rsms.me/inter/inter.css" />
+  </head>
+  <body>
+    <div id="root"></div>
+    <div style="display: flex; position: fixed; right: 16px; bottom: 16px">
+      <a href="https://GitHub.com/charliermarsh/ruff"
+        ><img
+          src="https://img.shields.io/github/stars/charliermarsh/ruff.svg?style=social&label=GitHub&maxAge=2592000&?logoWidth=100"
+          alt="GitHub stars"
+          style="width: 120px"
+      /></a>
+    </div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
--- a/playground/package-lock.json
+++ b/playground/package-lock.json
--- a/playground/package.json
+++ b/playground/package.json
@@ -0,0 +1,42 @@
+{
+  "name": "playground",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "build": "tsc && vite build",
+    "check": "npm run lint && npm run tsc",
+    "dev": "vite",
+    "fmt": "prettier --cache -w .",
+    "lint": "eslint --cache --ext .ts,.tsx src",
+    "preview": "vite preview",
+    "tsc": "tsc"
+  },
+  "dependencies": {
+    "@monaco-editor/react": "^4.4.6",
+    "classnames": "^2.3.2",
+    "lz-string": "^1.4.4",
+    "monaco-editor": "^0.34.1",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
+  },
+  "devDependencies": {
+    "@types/react": "^18.0.26",
+    "@types/react-dom": "^18.0.9",
+    "@typescript-eslint/eslint-plugin": "^5.47.1",
+    "@typescript-eslint/parser": "^5.47.1",
+    "@vitejs/plugin-react-swc": "^3.0.0",
+    "autoprefixer": "^10.4.13",
+    "eslint": "^8.30.0",
+    "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-import": "^2.26.0",
+    "eslint-plugin-prettier": "^4.2.1",
+    "eslint-plugin-react": "^7.31.11",
+    "eslint-plugin-react-hooks": "^4.6.0",
+    "postcss": "^8.4.20",
+    "prettier": "^2.8.1",
+    "tailwindcss": "^3.2.4",
+    "typescript": "^4.9.3",
+    "vite": "^4.0.0"
+  }
+}
--- a/playground/postcss.config.cjs
+++ b/playground/postcss.config.cjs
@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};
--- a/playground/src/Editor/Editor.tsx
+++ b/playground/src/Editor/Editor.tsx
@@ -0,0 +1,151 @@
+import { useCallback, useEffect, useState } from "react";
+import { DEFAULT_PYTHON_SOURCE } from "../constants";
+import init, { check, Check, currentVersion, defaultSettings } from "../pkg";
+import { ErrorMessage } from "./ErrorMessage";
+import Header from "./Header";
+import { useTheme } from "./theme";
+import { persist, restore, stringify } from "./settings";
+import SettingsEditor from "./SettingsEditor";
+import SourceEditor from "./SourceEditor";
+import MonacoThemes from "./MonacoThemes";
+
+type Tab = "Source" | "Settings";
+
+export default function Editor() {
+  const [initialized, setInitialized] = useState<boolean>(false);
+  const [version, setVersion] = useState<string | null>(null);
+  const [tab, setTab] = useState<Tab>("Source");
+  const [edit, setEdit] = useState<number>(0);
+  const [settingsSource, setSettingsSource] = useState<string | null>(null);
+  const [pythonSource, setPythonSource] = useState<string | null>(null);
+  const [checks, setChecks] = useState<Check[]>([]);
+  const [error, setError] = useState<string | null>(null);
+  const [theme, setTheme] = useTheme();
+
+  useEffect(() => {
+    init().then(() => setInitialized(true));
+  }, []);
+
+  useEffect(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    let config: any;
+    let checks: Check[];
+
+    try {
+      config = JSON.parse(settingsSource);
+    } catch (e) {
+      setChecks([]);
+      setError((e as Error).message);
+      return;
+    }
+
+    try {
+      checks = check(pythonSource, config);
+    } catch (e) {
+      setError(e as string);
+      return;
+    }
+
+    setError(null);
+    setChecks(checks);
+  }, [initialized, settingsSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    if (settingsSource == null || pythonSource == null) {
+      const payload = restore();
+      if (payload) {
+        const [settingsSource, pythonSource] = payload;
+        setSettingsSource(settingsSource);
+        setPythonSource(pythonSource);
+      } else {
+        setSettingsSource(stringify(defaultSettings()));
+        setPythonSource(DEFAULT_PYTHON_SOURCE);
+      }
+    }
+  }, [initialized, settingsSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    setVersion(currentVersion());
+  }, [initialized]);
+
+  const handleShare = useCallback(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    persist(settingsSource, pythonSource);
+  }, [initialized, settingsSource, pythonSource]);
+
+  const handlePythonSourceChange = useCallback((pythonSource: string) => {
+    setEdit((edit) => edit + 1);
+    setPythonSource(pythonSource);
+  }, []);
+
+  const handleSettingsSourceChange = useCallback((settingsSource: string) => {
+    setEdit((edit) => edit + 1);
+    setSettingsSource(settingsSource);
+  }, []);
+
+  return (
+    <main
+      className={
+        "h-full w-full flex flex-auto bg-ayu-background dark:bg-ayu-background-dark"
+      }
+    >
+      <Header
+        edit={edit}
+        tab={tab}
+        theme={theme}
+        version={version}
+        onChangeTab={setTab}
+        onChangeTheme={setTheme}
+        onShare={initialized ? handleShare : undefined}
+      />
+
+      <MonacoThemes />
+
+      <div className={"mt-12 relative flex-auto"}>
+        {initialized && settingsSource != null && pythonSource != null ? (
+          <>
+            <SourceEditor
+              visible={tab === "Source"}
+              source={pythonSource}
+              theme={theme}
+              checks={checks}
+              onChange={handlePythonSourceChange}
+            />
+            <SettingsEditor
+              visible={tab === "Settings"}
+              source={settingsSource}
+              theme={theme}
+              onChange={handleSettingsSourceChange}
+            />
+          </>
+        ) : null}
+      </div>
+      {error && tab === "Source" ? (
+        <div
+          style={{
+            position: "fixed",
+            left: "10%",
+            right: "10%",
+            bottom: "10%",
+          }}
+        >
+          <ErrorMessage>{error}</ErrorMessage>
+        </div>
+      ) : null}
+    </main>
+  );
+}
--- a/playground/src/Editor/ErrorMessage.tsx
+++ b/playground/src/Editor/ErrorMessage.tsx
@@ -0,0 +1,26 @@
+function truncate(str: string, length: number) {
+  if (str.length > length) {
+    return str.slice(0, length) + "...";
+  } else {
+    return str;
+  }
+}
+
+export function ErrorMessage({ children }: { children: string }) {
+  return (
+    <div
+      className="bg-orange-100 border-l-4 border-orange-500 text-orange-700 p-4"
+      role="alert"
+    >
+      <p className="font-bold">Error</p>
+      <p className="block sm:inline">
+        {truncate(
+          children.startsWith("Error: ")
+            ? children.slice("Error: ".length)
+            : children,
+          120,
+        )}
+      </p>
+    </div>
+  );
+}
--- a/playground/src/Editor/Header.tsx
+++ b/playground/src/Editor/Header.tsx
@@ -0,0 +1,99 @@
+import classNames from "classnames";
+import ThemeButton from "./ThemeButton";
+import ShareButton from "./ShareButton";
+import { Theme } from "./theme";
+import VersionTag from "./VersionTag";
+
+export type Tab = "Source" | "Settings";
+
+export default function Header({
+  edit,
+  tab,
+  theme,
+  version,
+  onChangeTab,
+  onChangeTheme,
+  onShare,
+}: {
+  edit: number;
+  tab: Tab;
+  theme: Theme;
+  version: string | null;
+  onChangeTab: (tab: Tab) => void;
+  onChangeTheme: (theme: Theme) => void;
+  onShare?: () => void;
+}) {
+  return (
+    <div
+      className={classNames(
+        "w-full",
+        "flex",
+        "items-center",
+        "justify-between",
+        "flex-none",
+        "pl-5",
+        "sm:pl-6",
+        "pr-4",
+        "lg:pr-6",
+        "absolute",
+        "z-10",
+        "top-0",
+        "left-0",
+        "-mb-px",
+        "antialiased",
+        "border-b",
+        "border-gray-200",
+        "dark:border-gray-800",
+      )}
+    >
+      <div className="flex space-x-5">
+        <button
+          type="button"
+          className={classNames(
+            "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
+            tab === "Source"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
+          )}
+          onClick={() => onChangeTab("Source")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Source" ? "opacity-100" : "opacity-0",
+            )}
+          />
+          Source
+        </button>
+        <button
+          type="button"
+          className={classNames(
+            "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
+            tab === "Settings"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
+          )}
+          onClick={() => onChangeTab("Settings")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Settings" ? "opacity-100" : "opacity-0",
+            )}
+          />
+          Settings
+        </button>
+        {version ? (
+          <div className={"flex items-center"}>
+            <VersionTag>v{version}</VersionTag>
+          </div>
+        ) : null}
+      </div>
+      <div className={"hidden sm:flex items-center min-w-0"}>
+        <ShareButton key={edit} onShare={onShare} />
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <ThemeButton theme={theme} onChange={onChangeTheme} />
+      </div>
+    </div>
+  );
+}
--- a/playground/src/Editor/MonacoThemes.tsx
+++ b/playground/src/Editor/MonacoThemes.tsx
--- a/playground/src/Editor/SettingsEditor.tsx
+++ b/playground/src/Editor/SettingsEditor.tsx
@@ -0,0 +1,57 @@
+/**
+ * Editor for the settings JSON.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { useCallback, useEffect } from "react";
+import schema from "../../../ruff.schema.json";
+import { Theme } from "./theme";
+
+export default function SettingsEditor({
+  visible,
+  source,
+  theme,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  theme: Theme;
+  onChange: (source: string) => void;
+}) {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    monaco?.languages.json.jsonDefaults.setDiagnosticsOptions({
+      schemas: [
+        {
+          uri: "https://raw.githubusercontent.com/charliermarsh/ruff/main/ruff.schema.json",
+          fileMatch: ["*"],
+          schema,
+        },
+      ],
+    });
+  }, [monaco]);
+
+  const handleChange = useCallback(
+    (value: string | undefined) => {
+      onChange(value ?? "");
+    },
+    [onChange],
+  );
+  return (
+    <Editor
+      options={{
+        readOnly: false,
+        minimap: { enabled: false },
+        fontSize: 14,
+        roundedSelection: false,
+        scrollBeyondLastLine: false,
+      }}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      language={"json"}
+      value={source}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
+      onChange={handleChange}
+    />
+  );
+}
--- a/playground/src/Editor/ShareButton.tsx
+++ b/playground/src/Editor/ShareButton.tsx
@@ -0,0 +1,53 @@
+import { useEffect, useState } from "react";
+
+export default function ShareButton({ onShare }: { onShare?: () => void }) {
+  const [copied, setCopied] = useState(false);
+
+  useEffect(() => {
+    if (copied) {
+      const timeout = setTimeout(() => setCopied(false), 2000);
+      return () => clearTimeout(timeout);
+    }
+  }, [copied]);
+
+  return copied ? (
+    <button
+      type="button"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 cursor-auto text-ayu-accent shadow-copied dark:bg-ayu-accent/10"
+    >
+      <span
+        className="absolute inset-0 flex items-center justify-center invisible"
+        aria-hidden="true"
+      >
+        Share
+      </span>
+      <span className="" aria-hidden="false">
+        Copied!
+      </span>
+    </button>
+  ) : (
+    <button
+      type="button"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 enabled:hover:bg-ayu-accent/80 bg-ayu-accent text-white shadow-sm dark:shadow-highlight/20 disabled:opacity-50"
+      disabled={!onShare || copied}
+      onClick={
+        onShare
+          ? () => {
+              setCopied(true);
+              onShare();
+            }
+          : undefined
+      }
+    >
+      <span
+        className="absolute inset-0 flex items-center justify-center"
+        aria-hidden="false"
+      >
+        Share
+      </span>
+      <span className="invisible" aria-hidden="true">
+        Copied!
+      </span>
+    </button>
+  );
+}
--- a/playground/src/Editor/SourceEditor.tsx
+++ b/playground/src/Editor/SourceEditor.tsx
@@ -0,0 +1,117 @@
+/**
+ * Editor for the Python source code.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { MarkerSeverity, MarkerTag } from "monaco-editor";
+import { useCallback, useEffect } from "react";
+import { Check } from "../pkg";
+import { Theme } from "./theme";
+
+export default function SourceEditor({
+  visible,
+  source,
+  theme,
+  checks,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  checks: Check[];
+  theme: Theme;
+  onChange: (pythonSource: string) => void;
+}) {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    const editor = monaco?.editor;
+    const model = editor?.getModels()[0];
+    if (!editor || !model) {
+      return;
+    }
+
+    editor.setModelMarkers(
+      model,
+      "owner",
+      checks.map((check) => ({
+        startLineNumber: check.location.row,
+        startColumn: check.location.column + 1,
+        endLineNumber: check.end_location.row,
+        endColumn: check.end_location.column + 1,
+        message: `${check.code}: ${check.message}`,
+        severity: MarkerSeverity.Error,
+        tags:
+          check.code === "F401" || check.code === "F841"
+            ? [MarkerTag.Unnecessary]
+            : [],
+      })),
+    );
+
+    const codeActionProvider = monaco?.languages.registerCodeActionProvider(
+      "python",
+      {
+        // @ts-expect-error: The type definition is wrong.
+        provideCodeActions: function (model, position) {
+          const actions = checks
+            .filter((check) => position.startLineNumber === check.location.row)
+            .filter((check) => check.fix)
+            .map((check) => ({
+              title: check.fix
+                ? `${check.code}: ${check.fix.message}` ?? `Fix ${check.code}`
+                : "Autofix",
+              id: `fix-${check.code}`,
+              kind: "quickfix",
+              edit: check.fix
+                ? {
+                    edits: [
+                      {
+                        resource: model.uri,
+                        versionId: model.getVersionId(),
+                        edit: {
+                          range: {
+                            startLineNumber: check.fix.location.row,
+                            startColumn: check.fix.location.column + 1,
+                            endLineNumber: check.fix.end_location.row,
+                            endColumn: check.fix.end_location.column + 1,
+                          },
+                          text: check.fix.content,
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+            }));
+          return { actions, dispose: () => {} };
+        },
+      },
+    );
+
+    return () => {
+      codeActionProvider?.dispose();
+    };
+  }, [checks, monaco]);
+
+  const handleChange = useCallback(
+    (value: string | undefined) => {
+      onChange(value ?? "");
+    },
+    [onChange],
+  );
+
+  return (
+    <Editor
+      options={{
+        readOnly: false,
+        minimap: { enabled: false },
+        fontSize: 14,
+        roundedSelection: false,
+        scrollBeyondLastLine: false,
+      }}
+      language={"python"}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
+      value={source}
+      onChange={handleChange}
+    />
+  );
+}
--- a/playground/src/Editor/ThemeButton.tsx
+++ b/playground/src/Editor/ThemeButton.tsx
@@ -0,0 +1,49 @@
+/**
+ * Button to toggle between light and dark mode themes.
+ */
+import { Theme } from "./theme";
+
+export default function ThemeButton({
+  theme,
+  onChange,
+}: {
+  theme: Theme;
+  onChange: (theme: Theme) => void;
+}) {
+  return (
+    <button
+      type="button"
+      className="ml-4 sm:ml-0 ring-1 ring-gray-900/5 shadow-sm hover:bg-gray-50 dark:ring-0 dark:bg-gray-800 dark:hover:bg-gray-700 dark:shadow-highlight/4 group focus:outline-none focus-visible:ring-2 rounded-md focus-visible:ring-ayu-accent dark:focus-visible:ring-2 dark:focus-visible:ring-gray-400"
+      onClick={() => onChange(theme === "light" ? "dark" : "light")}
+    >
+      <span className="sr-only">
+        <span className="dark:hidden">Switch to dark theme</span>
+        <span className="hidden dark:inline">Switch to light theme</span>
+      </span>
+      <svg
+        width="36"
+        height="36"
+        viewBox="-6 -6 36 36"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        className="stroke-ayu-accent fill-ayu-accent/10 group-hover:stroke-ayu-accent/80 dark:stroke-gray-400 dark:fill-gray-400/20 dark:group-hover:stroke-gray-300"
+      >
+        <g className="dark:opacity-0">
+          <path d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z"></path>
+          <path
+            d="M12 4v.01M17.66 6.345l-.007.007M20.005 12.005h-.01M17.66 17.665l-.007-.007M12 20.01V20M6.34 17.665l.007-.007M3.995 12.005h.01M6.34 6.344l.007.007"
+            fill="none"
+          />
+        </g>
+        <g className="opacity-0 dark:opacity-100">
+          <path d="M16 12a4 4 0 1 1-8 0 4 4 0 0 1 8 0Z" />
+          <path
+            d="M12 3v1M18.66 5.345l-.828.828M21.005 12.005h-1M18.66 18.665l-.828-.828M12 21.01V20M5.34 18.666l.835-.836M2.995 12.005h1.01M5.34 5.344l.835.836"
+            fill="none"
+          />
+        </g>
+      </svg>
+    </button>
+  );
+}
--- a/playground/src/Editor/VersionTag.tsx
+++ b/playground/src/Editor/VersionTag.tsx
@@ -0,0 +1,26 @@
+import classNames from "classnames";
+import { ReactNode } from "react";
+
+export default function VersionTag({ children }: { children: ReactNode }) {
+  return (
+    <div
+      className={classNames(
+        "text-gray-500",
+        "text-xs",
+        "leading-5",
+        "font-semibold",
+        "bg-gray-400/10",
+        "rounded-full",
+        "py-1",
+        "px-3",
+        "flex",
+        "items-center",
+        "dark:bg-gray-800",
+        "dark:text-gray-400",
+        "dark:shadow-highlight/4",
+      )}
+    >
+      {children}
+    </div>
+  );
+}
--- a/playground/src/Editor/index.tsx
+++ b/playground/src/Editor/index.tsx
@@ -0,0 +1,3 @@
+import Editor from "./Editor";
+
+export default Editor;
--- a/playground/src/Editor/settings.ts
+++ b/playground/src/Editor/settings.ts
@@ -0,0 +1,50 @@
+import lzstring from "lz-string";
+
+export type Settings = { [K: string]: any };
+
+/**
+ * Stringify a settings object to JSON.
+ */
+export function stringify(settings: Settings): string {
+  return JSON.stringify(
+    settings,
+    (k, v) => {
+      if (v instanceof Map) {
+        return Object.fromEntries(v.entries());
+      } else {
+        return v;
+      }
+    },
+    2,
+  );
+}
+
+/**
+ * Persist the configuration to a URL.
+ */
+export async function persist(settingsSource: string, pythonSource: string) {
+  const hash = lzstring.compressToEncodedURIComponent(
+    settingsSource + "$$$" + pythonSource,
+  );
+  await navigator.clipboard.writeText(
+    window.location.href.split("#")[0] + "#" + hash,
+  );
+}
+
+/**
+ * Restore the configuration from a URL.
+ */
+export function restore(): [string, string] | null {
+  const value = lzstring.decompressFromEncodedURIComponent(
+    window.location.hash.slice(1),
+  );
+
+  if (value) {
+    const parts = value.split("$$$");
+    const settingsSource = parts[0];
+    const pythonSource = parts[1];
+    return [settingsSource, pythonSource];
+  } else {
+    return null;
+  }
+}
--- a/playground/src/Editor/theme.ts
+++ b/playground/src/Editor/theme.ts
@@ -0,0 +1,35 @@
+/**
+ * Light and dark mode theming.
+ */
+import { useEffect, useState } from "react";
+
+export type Theme = "dark" | "light";
+
+export function useTheme(): [Theme, (theme: Theme) => void] {
+  const [localTheme, setLocalTheme] = useState<Theme>("light");
+
+  const setTheme = (mode: Theme) => {
+    if (mode === "dark") {
+      document.body.classList.add("dark");
+    } else {
+      document.body.classList.remove("dark");
+    }
+    localStorage.setItem("theme", mode);
+    setLocalTheme(mode);
+  };
+
+  useEffect(() => {
+    const initialTheme = localStorage.getItem("theme");
+    if (initialTheme === "dark") {
+      setTheme("dark");
+    } else if (initialTheme === "light") {
+      setTheme("light");
+    } else if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
+      setTheme("dark");
+    } else {
+      setTheme("light");
+    }
+  }, []);
+
+  return [localTheme, setTheme];
+}
--- a/playground/src/Editor/utils.ts
+++ b/playground/src/Editor/utils.ts
@@ -0,0 +1,7 @@
+export async function copyTextToClipboard(text: string) {
+  if ("clipboard" in navigator) {
+    return await navigator.clipboard.writeText(text);
+  } else {
+    return document.execCommand("copy", true, text);
+  }
+}
--- a/playground/src/constants.ts
+++ b/playground/src/constants.ts
@@ -0,0 +1,31 @@
+export const DEFAULT_PYTHON_SOURCE =
+  "import os\n" +
+  "\n" +
+  "# Define a function that takes an integer n and returns the nth number in the Fibonacci\n" +
+  "# sequence.\n" +
+  "def fibonacci(n):\n" +
+  '    """Compute the nth number in the Fibonacci sequence."""\n' +
+  "    x = 1\n" +
+  "    if n == 0:\n" +
+  "        return 0\n" +
+  "    elif n == 1:\n" +
+  "        return 1\n" +
+  "    else:\n" +
+  "        return fibonacci(n - 1) + fibonacci(n - 2)\n" +
+  "\n" +
+  "\n" +
+  "# Use a for loop to generate and print the first 10 numbers in the Fibonacci sequence.\n" +
+  "for i in range(10):\n" +
+  "    print(fibonacci(i))\n" +
+  "\n" +
+  "# Output:\n" +
+  "# 0\n" +
+  "# 1\n" +
+  "# 1\n" +
+  "# 2\n" +
+  "# 3\n" +
+  "# 5\n" +
+  "# 8\n" +
+  "# 13\n" +
+  "# 21\n" +
+  "# 34\n";
--- a/playground/src/index.css
+++ b/playground/src/index.css
@@ -0,0 +1,24 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+* {
+  box-sizing: border-box;
+}
+
+body,
+html,
+#root {
+  margin: 0;
+  height: 100%;
+  width: 100%;
+}
+
+.shadow-copied {
+  --tw-shadow: 0 0 0 1px #f07171, inset 0 0 0 1px #f07171;
+  --tw-shadow-colored: 0 0 0 1px var(--tw-shadow-color),
+    inset 0 0 0 1px var(--tw-shadow-color);
+
+  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000),
+    var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
+}
--- a/playground/src/main.tsx
+++ b/playground/src/main.tsx
@@ -0,0 +1,10 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import Editor from "./Editor";
+import "./index.css";
+
+ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
+  <React.StrictMode>
+    <Editor />
+  </React.StrictMode>,
+);
--- a/playground/src/third-party.d.ts
+++ b/playground/src/third-party.d.ts
@@ -0,0 +1,6 @@
+declare module "lz-string" {
+  function decompressFromEncodedURIComponent(
+    input: string | null,
+  ): string | null;
+  function compressToEncodedURIComponent(input: string | null): string;
+}
--- a/playground/src/vite-env.d.ts
+++ b/playground/src/vite-env.d.ts
@@ -0,0 +1 @@
+/// <reference types="vite/client" />
--- a/playground/tailwind.config.cjs
+++ b/playground/tailwind.config.cjs
@@ -0,0 +1,22 @@
+/** @type {import('tailwindcss').Config} */
+const defaultTheme = require("tailwindcss/defaultTheme");
+
+module.exports = {
+  darkMode: "class",
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  theme: {
+    extend: {
+      colors: {
+        "ayu-accent": "#f07171",
+        "ayu-background": {
+          DEFAULT: "#f8f9fa",
+          dark: "#0b0e14",
+        },
+      },
+      fontFamily: {
+        sans: ["Inter var", ...defaultTheme.fontFamily.sans],
+      },
+    },
+  },
+  plugins: [],
+};
--- a/playground/tsconfig.json
+++ b/playground/tsconfig.json
@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "lib": ["DOM", "DOM.Iterable", "ESNext"],
+    "allowJs": false,
+    "skipLibCheck": true,
+    "esModuleInterop": false,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx"
+  },
+  "include": ["src"],
+  "references": [{ "path": "./tsconfig.node.json" }]
+}
--- a/playground/tsconfig.node.json
+++ b/playground/tsconfig.node.json
@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}
--- a/playground/vite.config.ts
+++ b/playground/vite.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react-swc";
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [react()],
+});
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,19 @@
+[build-system]
+requires = ["maturin>=0.14,<0.15"]
+build-backend = "maturin"
+
 [project]
 name = "ruff"
+version = "0.0.207"
+description = "An extremely fast Python linter, written in Rust."
+authors = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+maintainers = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+requires-python = ">=3.7"
+license = { file = "LICENSE" }
 keywords = ["automation", "flake8", "pycodestyle", "pyflakes", "pylint", "clippy"]
 classifiers = [
    "Development Status :: 3 - Alpha",
@@ -17,24 +31,20 @@ classifiers = [
    "Topic :: Software Development :: Libraries :: Python Modules",
    "Topic :: Software Development :: Quality Assurance",
 ]
-author = "Charlie Marsh"
-author_email = "charlie.r.marsh@gmail.com"
-description = "An extremely fast Python linter, written in Rust."
-requires-python = ">=3.7"
-
-[project.urls]
-repository = "https://github.com/charliermarsh/ruff"
-
-[build-system]
-requires = ["maturin>=0.14,<0.15"]
-build-backend = "maturin"
+urls = { repository = "https://github.com/charliermarsh/ruff-lsp" }

 [tool.maturin]
 bindings = "bin"
 strip = true

 [tool.ruff]
+line-length = 88

 [tool.ruff.isort]
 force-wrap-aliases = true
 combine-as-imports = true
+force-single-line = true
+single-line-exclusions = ["os", "logging.handlers"]
+
+[tool.ruff.pydocstyle]
+convention = "google"
--- a/resources/test/fixtures/flake8_bandit/S105.py
+++ b/resources/test/fixtures/flake8_bandit/S105.py
@@ -51,3 +51,12 @@ secret == "s3cr3t"
 token == "s3cr3t"
 secrete == "s3cr3t"
 password == safe == "s3cr3t"
+
+if token == "1\n2":
+    pass
+
+if token == "3\t4":
+    pass
+
+if token == "5\r6":
+    pass
--- a/resources/test/fixtures/flake8_implicit_str_concat/ISC.py
+++ b/resources/test/fixtures/flake8_implicit_str_concat/ISC.py
@@ -0,0 +1,36 @@
+_ = "a" "b" "c"
+
+_ = "abc" + "def"
+
+_ = "abc" \
+    "def"
+
+_ = (
+  "abc" +
+  "def"
+)
+
+_ = (
+  f"abc" +
+  "def"
+)
+
+_ = (
+  b"abc" +
+  b"def"
+)
+
+_ = (
+  "abc"
+  "def"
+)
+
+_ = (
+  f"abc"
+  "def"
+)
+
+_ = (
+  b"abc"
+  b"def"
+)
--- a/resources/test/fixtures/flake8_return/RET504.py
+++ b/resources/test/fixtures/flake8_return/RET504.py
@@ -137,6 +137,14 @@ def x():
    return a


+# Considered OK, since attribute assignments can have side effects.
+class X:
+    def x(self):
+        a = self.property
+        self.property = None
+        return a
+
+
 # Test cases for using value for assignment then returning it
 # See:https://github.com/afonasev/flake8-return/issues/47
 def resolve_from_url(self, url: str) -> dict:
@@ -238,13 +246,16 @@ def close(self):
            report(traceback.format_exc())
    return any_failed

+
 def global_assignment():
    global X
    X = 1
    return X

+
 def nonlocal_assignment():
    X = 1
+
    def inner():
        nonlocal X
        X = 1
--- a/resources/test/fixtures/flake8_simplify/SIM300.py
+++ b/resources/test/fixtures/flake8_simplify/SIM300.py
@@ -0,0 +1,11 @@
+# Errors
+"yoda" == compare  # SIM300
+42 == age  # SIM300
+
+# OK
+compare == "yoda"
+age == 42
+x == y
+"yoda" == compare == 1
+"yoda" == compare == someothervar
+"yoda" == "yoda"
--- a/resources/test/fixtures/flake8_tidy_imports/TID251.py
+++ b/resources/test/fixtures/flake8_tidy_imports/TID251.py
@@ -0,0 +1,33 @@
+## Banned modules ##
+import cgi
+
+from cgi import *
+
+from cgi import a, b, c
+
+# banning a module also bans any submodules
+import cgi.foo.bar
+
+from cgi.foo import bar
+
+from cgi.foo.bar import *
+
+## Banned module members ##
+
+from typing import TypedDict
+
+import typing
+
+# attribute access is checked
+typing.TypedDict
+
+typing.TypedDict.anything
+
+# function calls are checked
+typing.TypedDict()
+
+typing.TypedDict.anything()
+
+# import aliases are resolved
+import typing as totally_not_typing
+totally_not_typing.TypedDict
--- a/resources/test/fixtures/flake8_tidy_imports/TID251_false_positives.py
+++ b/resources/test/fixtures/flake8_tidy_imports/TID251_false_positives.py
@@ -0,0 +1,11 @@
+# module members cannot be imported with that syntax
+import typing.TypedDict
+
+# we don't track reassignments
+import typing, other
+typing = other
+typing.TypedDict()
+
+# yet another false positive
+def foo(typing):
+    typing.TypedDict()
--- a/resources/test/fixtures/flake8_unused_arguments/ARG.py
+++ b/resources/test/fixtures/flake8_unused_arguments/ARG.py
@@ -1,4 +1,5 @@
 from abc import abstractmethod
+from typing import overload
 from typing_extensions import override


@@ -135,3 +136,20 @@ class C:
    @override
    def f(x):
        print("Hello, world!")
+
+
+###
+# Unused arguments attached to overloads (OK).
+###
+@overload
+def f(a: str, b: str) -> str:
+    ...
+
+
+@overload
+def f(a: int, b: int) -> str:
+    ...
+
+
+def f(a, b):
+    return f"{a}{b}"
--- a/resources/test/fixtures/isort/comments.py
+++ b/resources/test/fixtures/isort/comments.py
@@ -23,3 +23,6 @@ from A import (
    b,  # Comment 10
    c,  # Comment 11
 )
+
+from D import a_long_name_to_force_multiple_lines # Comment 12
+from D import another_long_name_to_force_multiple_lines # Comment 13
--- a/resources/test/fixtures/isort/force_single_line.py
+++ b/resources/test/fixtures/isort/force_single_line.py
@@ -0,0 +1,18 @@
+import sys, math
+from os import path, uname
+from logging.handlers import StreamHandler, FileHandler
+
+# comment 1
+from third_party import lib1, lib2, \
+     lib3, lib7, lib5, lib6
+# comment 2
+from third_party import lib4
+
+from foo import bar  # comment 3
+from foo2 import bar2  # comment 4
+
+# comment 5
+from bar import (
+     a, # comment 6
+     b, # comment 7
+)
--- a/resources/test/fixtures/isort/line_ending_cr.py
+++ b/resources/test/fixtures/isort/line_ending_cr.py
@@ -0,0 +1 @@
+from long_module_name import member_one, member_two, member_three, member_four, member_five
--- a/resources/test/fixtures/isort/line_ending_crlf.py
+++ b/resources/test/fixtures/isort/line_ending_crlf.py
@@ -0,0 +1,2 @@
+from long_module_name import member_one, member_two, member_three, member_four, member_five
+
--- a/resources/test/fixtures/isort/line_ending_lf.py
+++ b/resources/test/fixtures/isort/line_ending_lf.py
@@ -0,0 +1,2 @@
+from long_module_name import member_one, member_two, member_three, member_four, member_five
+
--- a/resources/test/fixtures/isort/magic_trailing_comma.py
+++ b/resources/test/fixtures/isort/magic_trailing_comma.py
@@ -0,0 +1,38 @@
+# This has a magic trailing comma, will be sorted, but not rolled into one line
+from sys import (
+    stderr,
+    argv,
+    stdout,
+    exit,
+)
+
+# No magic comma, this will be rolled into one line.
+from os import (
+    path,
+    environ,
+    execl,
+    execv
+)
+
+from glob import (
+    glob,
+    iglob,
+    escape,  # Ends with a comment, should still treat as magic trailing comma.
+)
+
+# These will be combined, but without a trailing comma.
+from foo import bar
+from foo import baz
+
+# These will be combined, _with_ a trailing comma.
+from module1 import member1
+from module1 import (
+    member2,
+    member3,
+)
+
+# These will be combined, _with_ a trailing comma.
+from module2 import member1, member2
+from module2 import (
+    member3,
+)
--- a/resources/test/fixtures/isort/natural_order.py
+++ b/resources/test/fixtures/isort/natural_order.py
@@ -0,0 +1,16 @@
+import numpy1
+import numpy10
+import numpy2
+from numpy import (
+    cos,
+    int8,
+    sin,
+    int32,
+    int64,
+    tan,
+    uint8,
+    uint16,
+    int16,
+    uint32,
+    uint64,
+)
--- a/resources/test/fixtures/pydocstyle/D104/init.py
+++ b/resources/test/fixtures/pydocstyle/D104/init.py
--- a/resources/test/fixtures/pydocstyle/D400.py
+++ b/resources/test/fixtures/pydocstyle/D400.py
@@ -35,7 +35,6 @@ def f():
    ...


-
 def f():
    r"Here's a line without a period"
    ...
@@ -71,3 +70,24 @@ def f():
    Here's a line without a period,
    but here's the next line with trailing space """
    ...
+
+
+def f(rounds: list[int], number: int) -> bool:
+    """
+    :param rounds: list - rounds played.
+    :param number: int - round number.
+    :return:  bool - was the round played?
+    """
+    return number in rounds
+
+
+def f(rounds: list[int], number: int) -> bool:
+    """
+    Args:
+        rounds (list): rounds played.
+        number (int): round number.
+
+    Returns:
+        bool: was the round played?
+    """
+    return number in rounds
--- a/resources/test/fixtures/pydocstyle/D417.py
+++ b/resources/test/fixtures/pydocstyle/D417.py
@@ -0,0 +1,84 @@
+def f(x, y, z):
+    """Do f.
+
+    Args:
+        x: the value
+            with a hanging indent
+
+    Returns:
+        the value
+    """
+    return x
+
+
+def f(x, y, z):
+    """Do f.
+
+    Args:
+        x:
+            The whole thing has a hanging indent.
+
+    Returns:
+        the value
+    """
+    return x
+
+
+def f(x, y, z):
+    """Do f.
+
+    Args:
+        x:
+            The whole thing has a hanging indent.
+
+    Returns: the value
+    """
+    return x
+
+
+def f(x, y, z):
+    """Do f.
+
+    Args:
+        x: the value def
+            ghi
+
+    Returns:
+        the value
+    """
+    return x
+
+
+def f(x, y, z):
+    """Do f.
+
+    Args:
+        x: the value
+        z: A final argument
+
+    Returns:
+        the value
+    """
+    return x
+
+
+def f(x, y, z):
+    """Do g.
+
+    Args:
+        x: the value
+        z: A final argument
+
+    Returns: the value
+    """
+    return x
+
+
+def f(x, y, z):
+    """Do h.
+
+    Args:
+        x: the value
+        z: A final argument
+    """
+    return x
--- a/resources/test/fixtures/pyflakes/F401_7.py
+++ b/resources/test/fixtures/pyflakes/F401_7.py
@@ -1,16 +1,66 @@
 """Test: noqa directives."""

-from module import (
-    A,  # noqa: F401
-    B,
+# This should ignore both errors.
+from typing import (  # noqa: F401
+    List,
+    Sequence,
 )

-from module import (
-    A,  # noqa: F401
-    B,  # noqa: F401
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
 )

-from module import (
-    A,
-    B,
+# This should ignore both errors.
+from typing import (
+    List,  # noqa: F401
+    Sequence,  # noqa: F401
 )
+
+# This should ignore both errors.
+from typing import (
+    List,  # noqa
+    Sequence,  # noqa
+)
+
+# This should ignore the first error.
+from typing import (
+    Mapping,  # noqa: F401
+    Union,
+)
+
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa: F401
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F401
+    Dict,  # noqa: F501
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F501
+    Tuple,  # noqa: F401
+)
+
+# This should ignore both errors.
+from typing import Any, AnyStr  # noqa: F401
+
+# This should ignore both errors.
+from typing import AsyncIterable, AsyncGenerator  # noqa
+
+# This should mark F501 as unused.
+from typing import Awaitable, AwaitableGenerator  # noqa: F501
--- a/resources/test/fixtures/pyflakes/F541.py
+++ b/resources/test/fixtures/pyflakes/F541.py
@@ -1,6 +1,8 @@
+# OK
 a = "abc"
 b = f"ghi{'jkl'}"

+# Errors
 c = f"def"
 d = f"def" + "ghi"
 e = (
@@ -8,5 +10,18 @@ e = (
    "ghi"
 )

+# OK
 g = f"ghi{123:{45}}"
+
+# Error
 h = "x" "y" f"z"
+
+v = 23.234234
+
+# OK
+f"{v:0.2f}"
+f"{f'{v:0.2f}'}"
+
+# Errors
+f"{v:{f'0.2f'}}"
+f"{f''}"
--- a/resources/test/fixtures/pyflakes/F821_0.py
+++ b/resources/test/fixtures/pyflakes/F821_0.py
@@ -89,7 +89,8 @@ A = (
    f'B'
    f'{B}'
 )
-
+C = f'{A:{B}}'
+C = f'{A:{f"{B}"}}'

 from typing import Annotated, Literal

--- a/resources/test/fixtures/pyflakes/F831.py
+++ b/resources/test/fixtures/pyflakes/F831.py
@@ -1,10 +0,0 @@
-def foo(x: int, y: int, x: int) -> None:
-    pass
-
-
-def bar(x: int, y: int, *, x: int) -> None:
-    pass
-
-
-def baz(x: int, y: int, **x: int) -> None:
-    pass
--- a/resources/test/fixtures/pyflakes/F841_2.py
+++ b/resources/test/fixtures/pyflakes/F841_2.py
@@ -0,0 +1,6 @@
+from __future__ import annotations
+
+# test case for https://github.com/charliermarsh/ruff/issues/1552
+def _():
+    x = 0
+    list()[x:]
--- a/resources/test/fixtures/pygrep-hooks/PGH004_0.py
+++ b/resources/test/fixtures/pygrep-hooks/PGH004_0.py
@@ -0,0 +1,11 @@
+x = 1  # noqa
+x = 1  # NOQA:F401,W203
+# noqa
+# NOQA
+# noqa:F401
+# noqa:F401,W203
+
+x = 1
+x = 1  # noqa: F401, W203
+# noqa: F401
+# noqa: F401, W203
--- a/resources/test/fixtures/pyproject.toml
+++ b/resources/test/fixtures/pyproject.toml
@@ -42,6 +42,10 @@ staticmethod-decorators = ["staticmethod"]
 [tool.ruff.flake8-tidy-imports]
 ban-relative-imports = "parents"

+[tool.ruff.flake8-tidy-imports.banned-api]
+"cgi".msg = "The cgi module is deprecated."
+"typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+
 [tool.ruff.flake8-errmsg]
 max-string-length = 20

--- a/resources/test/fixtures/pyupgrade/UP019.py
+++ b/resources/test/fixtures/pyupgrade/UP019.py
@@ -0,0 +1,20 @@
+import typing
+import typing as Hello
+from typing import Text
+from typing import Text as Goodbye
+
+
+def print_word(word: Text) -> None:
+    print(word)
+
+
+def print_second_word(word: typing.Text) -> None:
+    print(word)
+
+
+def print_third_word(word: Hello.Text) -> None:
+    print(word)
+
+
+def print_fourth_word(word: Goodbye) -> None:
+    print(word)
--- a/resources/test/fixtures/pyupgrade/UP020.py
+++ b/resources/test/fixtures/pyupgrade/UP020.py
@@ -0,0 +1,9 @@
+from io import open
+
+with open("f.txt") as f:
+    print(f.read())
+
+import io
+
+with io.open("f.txt", mode="r", buffering=-1, **kwargs) as f:
+    print(f.read())
--- a/resources/test/fixtures/pyupgrade/UP021.py
+++ b/resources/test/fixtures/pyupgrade/UP021.py
@@ -0,0 +1,12 @@
+import subprocess
+import subprocess as somename
+from subprocess import run
+from subprocess import run as anothername
+
+subprocess.run(["foo"], universal_newlines=True, check=True)
+somename.run(["foo"], universal_newlines=True)
+
+run(["foo"], universal_newlines=True, check=False)
+anothername(["foo"], universal_newlines=True)
+
+subprocess.run(["foo"], check=True)
--- a/resources/test/fixtures/pyupgrade/UP022.py
+++ b/resources/test/fixtures/pyupgrade/UP022.py
@@ -0,0 +1,42 @@
+from subprocess import run
+import subprocess
+
+output = run(["foo"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+output = subprocess.run(["foo"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+output = subprocess.run(stdout=subprocess.PIPE, args=["foo"],  stderr=subprocess.PIPE)
+
+output = subprocess.run(
+    ["foo"], stdout=subprocess.PIPE, check=True, stderr=subprocess.PIPE
+)
+
+output = subprocess.run(
+    ["foo"], stderr=subprocess.PIPE, check=True, stdout=subprocess.PIPE
+)
+
+output = subprocess.run(
+    ["foo"],
+    stdout=subprocess.PIPE,
+    check=True,
+    stderr=subprocess.PIPE,
+    text=True,
+    encoding="utf-8",
+    close_fds=True,
+)
+
+if output:
+    output = subprocess.run(
+        ["foo"],
+        stdout=subprocess.PIPE,
+        check=True,
+        stderr=subprocess.PIPE,
+        text=True,
+        encoding="utf-8",
+    )
+
+
+# Examples that should NOT trigger the rule
+from foo import PIPE
+subprocess.run(["foo"], stdout=PIPE, stderr=PIPE)
+run(["foo"], stdout=None, stderr=PIPE)
--- a/resources/test/fixtures/pyupgrade/UP023.py
+++ b/resources/test/fixtures/pyupgrade/UP023.py
@@ -0,0 +1,31 @@
+# These two imports have something after cElementTree, so they should be fixed.
+from xml.etree.cElementTree import XML, Element, SubElement
+import xml.etree.cElementTree as ET
+
+# Weird spacing should not cause issues.
+from   xml.etree.cElementTree    import  XML
+import    xml.etree.cElementTree       as      ET
+
+# Multi line imports should also work fine.
+from xml.etree.cElementTree import (
+    XML,
+    Element,
+    SubElement,
+)
+if True:
+    import xml.etree.cElementTree as ET
+    from xml.etree import cElementTree as CET
+
+from xml.etree import cElementTree as ET
+
+import contextlib, xml.etree.cElementTree as ET
+
+# This should fix the second, but not the first invocation.
+import xml.etree.cElementTree, xml.etree.cElementTree as ET
+
+# The below items should NOT be changed.
+import xml.etree.cElementTree
+
+from .xml.etree.cElementTree import XML
+
+from xml.etree import cElementTree
--- a/resources/test/fixtures/pyupgrade/UP024_0.py
+++ b/resources/test/fixtures/pyupgrade/UP024_0.py
@@ -0,0 +1,98 @@
+import mmap, select, socket
+from mmap import error
+# These should be fixed
+try:
+    pass
+except EnvironmentError:
+    pass
+
+try:
+    pass
+except IOError:
+    pass
+
+try:
+    pass
+except WindowsError:
+    pass
+
+try:
+    pass
+except mmap.error:
+    pass
+
+try:
+    pass
+except select.error:
+    pass
+
+try:
+    pass
+except socket.error:
+    pass
+
+try:
+    pass
+except error:
+    pass
+
+# Should NOT be in parentheses when replaced
+
+try:
+    pass
+except (IOError,):
+    pass
+try:
+    pass
+except (mmap.error,):
+    pass
+try:
+    pass
+except (EnvironmentError, IOError, OSError, select.error):
+    pass
+
+# Should be kept in parentheses (because multiple)
+
+try:
+    pass
+except (IOError, KeyError, OSError):
+    pass
+
+# First should change, second should not
+from .mmap import error
+try:
+    pass
+except (IOError, error):
+    pass
+# These should not change
+
+from foo import error
+
+try:
+    pass
+except (OSError, error):
+    pass
+
+try:
+    pass
+except:
+    pass
+
+try:
+    pass
+except AssertionError:
+    pass
+try:
+    pass
+except (mmap).error:
+    pass
+
+try:
+    pass
+except OSError:
+    pass
+
+try:
+    pass
+except (OSError, KeyError):
+    pass
--- a/resources/test/fixtures/pyupgrade/UP024_1.py
+++ b/resources/test/fixtures/pyupgrade/UP024_1.py
@@ -0,0 +1,17 @@
+import mmap, socket, select
+
+try:
+    pass
+except (OSError, mmap.error, IOError):
+    pass
+except (OSError, socket.error, KeyError):
+    pass
+
+try:
+    pass
+except (
+    OSError,
+    select.error,
+    IOError,
+):
+    pass
--- a/resources/test/fixtures/pyupgrade/UP024_2.py
+++ b/resources/test/fixtures/pyupgrade/UP024_2.py
@@ -0,0 +1,50 @@
+# These should not change
+raise ValueError
+raise ValueError(1)
+
+from .mmap import error
+raise error
+
+# Testing the modules
+import socket, mmap, select
+raise socket.error
+raise mmap.error
+raise select.error
+
+raise socket.error()
+raise mmap.error(1)
+raise select.error(1, 2)
+
+raise socket.error(
+    1,
+    2,
+    3,
+)
+
+from mmap import error
+raise error
+
+from socket import error
+raise error(1)
+
+from select import error
+raise error(1, 2)
+
+# Testing the names
+raise EnvironmentError
+raise IOError
+raise WindowsError
+
+raise EnvironmentError()
+raise IOError(1)
+raise WindowsError(1, 2)
+
+raise EnvironmentError(
+    1,
+    2,
+    3,
+)
+
+raise WindowsError
+raise EnvironmentError(1)
+raise IOError(1, 2)
--- a/resources/test/fixtures/pyupgrade/UP025.py
+++ b/resources/test/fixtures/pyupgrade/UP025.py
@@ -0,0 +1,27 @@
+# These should change
+x = u"Hello"
+
+u'world'
+
+print(u"Hello")
+
+print(u'world')
+
+import foo
+
+foo(u"Hello", U"world", a=u"Hello", b=u"world")
+
+# These should stay quoted they way they are
+
+x = u'hello'
+x = u"""hello"""
+x = u'''hello'''
+x = u'Hello "World"'
+
+# These should not change
+u = "Hello"
+
+u = u
+
+def hello():
+    return"Hello"
--- a/resources/test/fixtures/pyupgrade/UP026.py
+++ b/resources/test/fixtures/pyupgrade/UP026.py
@@ -0,0 +1,74 @@
+# These should be changed
+if True:
+    import mock
+
+if True:
+    import mock, sys
+
+# This goes to from unitest import mock
+import mock.mock
+
+# Mock should go on a new line as `from unittest import mock`
+import contextlib, mock, sys
+
+# Mock should go on a new line as `from unittest import mock`
+import mock, sys
+x = "This code should be preserved one line below the mock"
+
+# Mock should go on a new line as `from unittest import mock`
+from mock import mock
+
+# Should keep trailing comma
+from mock import (
+    mock,
+    a,
+    b,
+    c,
+)
+
+# Should not get a trailing comma
+from mock import (
+    mock,
+    a,
+    b,
+    c
+)
+
+if True:
+    if False:
+        from mock import (
+            mock,
+            a,
+            b,
+            c
+        )
+
+# These should not change:
+import os, io
+
+# Mock should go on a new line as `from unittest import mock`
+import mock, mock
+
+# Mock should go on a new line as `from unittest import mock as foo`
+import mock as foo
+
+# Mock should go on a new line as `from unittest import mock as foo`
+from mock import mock as foo
+
+if True:
+    # This should yield multiple, aliased imports.
+    import mock as foo, mock as bar, mock
+
+    # This should yield multiple, aliased imports, and preserve `os`.
+    import mock as foo, mock as bar, mock, os
+
+if True:
+    # This should yield multiple, aliased imports.
+    from mock import mock as foo, mock as bar, mock
+
+
+# This should be unchanged.
+x = mock.Mock()
+
+# This should change to `mock.Mock`().
+x = mock.mock.Mock()
--- a/resources/test/fixtures/pyupgrade/UP027.py
+++ b/resources/test/fixtures/pyupgrade/UP027.py
@@ -0,0 +1,18 @@
+# Should change
+foo, bar, baz = [fn(x) for x in items]
+
+foo, bar, baz =[fn(x) for x in items]
+
+foo, bar, baz =          [fn(x) for x in items]
+
+foo, bar, baz = [[i for i in fn(x)] for x in items]
+
+foo, bar, baz = [
+    fn(x)
+    for x in items
+]
+
+# Should not change
+foo = [fn(x) for x in items]
+
+x, = [await foo for foo in bar]
--- a/resources/test/fixtures/ruff/RUF004.py
+++ b/resources/test/fixtures/ruff/RUF004.py
@@ -0,0 +1,15 @@
+def f(*args, **kwargs):
+    pass
+
+
+a = (1, 2)
+b = (3, 4)
+c = (5, 6)
+d = (7, 8)
+
+f(a, b)
+f(a, kw=b)
+f(*a, kw=b)
+f(kw=a, *b)
+f(kw=a, *b, *c)
+f(*a, kw=b, *c, kw1=d)
--- a/resources/test/fixtures/ruff/RUF100_0.py
+++ b/resources/test/fixtures/ruff/RUF100_0.py
--- a/resources/test/fixtures/ruff/RUF100_1.py
+++ b/resources/test/fixtures/ruff/RUF100_1.py
@@ -0,0 +1,64 @@
+# This should ignore both errors.
+from typing import (  # noqa: F401
+    List,
+    Sequence,
+)
+
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
+)
+
+# This should ignore both errors.
+from typing import (
+    List,  # noqa: F401
+    Sequence,  # noqa: F401
+)
+
+# This should ignore both errors.
+from typing import (
+    List,  # noqa
+    Sequence,  # noqa
+)
+
+# This should ignore the first error.
+from typing import (
+    Mapping,  # noqa: F401
+    Union,
+)
+
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa: F401
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F401
+    Dict,  # noqa: F501
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F501
+    Tuple,  # noqa: F401
+)
+
+# This should ignore both errors.
+from typing import Any, AnyStr  # noqa: F401
+
+# This should ignore both errors.
+from typing import AsyncIterable, AsyncGenerator  # noqa
+
+# This should mark F501 as unused.
+from typing import Awaitable, AwaitableGenerator  # noqa: F501
--- a/resources/test/project/examples/docs/pyproject.toml
+++ b/resources/test/project/examples/docs/pyproject.toml
@@ -1,4 +1,3 @@
-[tool.ruff]
 extend = "../../pyproject.toml"
 src = ["."]
 # Enable I001, and re-enable F841, to test extension priority.
--- a/ruff.schema.json
+++ b/ruff.schema.json
@@ -93,6 +93,13 @@
        "null"
      ]
    },
+    "fix-only": {
+      "description": "Like `fix`, but disables reporting on leftover violation. Implies `fix`.",
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
    "fixable": {
      "description": "A list of check code prefixes to consider autofix-able.",
      "type": [
@@ -104,7 +111,7 @@
      }
    },
    "flake8-annotations": {
-      "description": "Plugins Options for the `flake8-annotations` plugin.",
+      "description": "Options for the `flake8-annotations` plugin.",
      "anyOf": [
        {
          "$ref": "#/definitions/Flake8AnnotationsOptions"
@@ -188,7 +195,7 @@
      ]
    },
    "format": {
-      "description": "The style in which violation messages should be formatted: `\"text\"` (default), `\"grouped\"` (group messages by file), `\"json\"` (machine-readable), `\"junit\"` (machine-readable XML), or `\"github\"` (GitHub Actions annotations).",
+      "description": "The style in which violation messages should be formatted: `\"text\"` (default), `\"grouped\"` (group messages by file), `\"json\"` (machine-readable), `\"junit\"` (machine-readable XML), `\"github\"` (GitHub Actions annotations) or `\"gitlab\"` (GitLab CI code quality report).",
      "anyOf": [
        {
          "$ref": "#/definitions/SerializationFormat"
@@ -270,6 +277,17 @@
        }
      }
    },
+    "pydocstyle": {
+      "description": "Options for the `pydocstyle` plugin.",
+      "anyOf": [
+        {
+          "$ref": "#/definitions/Pydocstyle"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
    "pyupgrade": {
      "description": "Options for the `pyupgrade` plugin.",
      "anyOf": [
@@ -281,6 +299,17 @@
        }
      ]
    },
+    "required-version": {
+      "description": "Require a specific version of Ruff to be running (useful for unifying results across many environments, e.g., with a `pyproject.toml` file).",
+      "anyOf": [
+        {
+          "$ref": "#/definitions/Version"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
    "respect-gitignore": {
      "description": "Whether to automatically exclude files that are ignored by `.ignore`, `.gitignore`, `.git/info/exclude`, and global `gitignore` files. Enabled by default.",
      "type": [
@@ -335,10 +364,30 @@
      "items": {
        "$ref": "#/definitions/CheckCodePrefix"
      }
+    },
+    "update-check": {
+      "description": "Enable or disable automatic update checks (overridden by the `--update-check` and `--no-update-check` command-line flags).",
+      "type": [
+        "boolean",
+        "null"
+      ]
    }
  },
  "additionalProperties": false,
  "definitions": {
+    "BannedApi": {
+      "type": "object",
+      "required": [
+        "msg"
+      ],
+      "properties": {
+        "msg": {
+          "description": "The message to display when the API is used.",
+          "type": "string"
+        }
+      },
+      "additionalProperties": false
+    },
    "CheckCodePrefix": {
      "type": "string",
      "enum": [
@@ -348,6 +397,7 @@
        "A001",
        "A002",
        "A003",
+        "ALL",
        "ANN",
        "ANN0",
        "ANN00",
@@ -602,8 +652,6 @@
        "F821",
        "F822",
        "F823",
-        "F83",
-        "F831",
        "F84",
        "F841",
        "F842",
@@ -633,6 +681,12 @@
        "ICN0",
        "ICN00",
        "ICN001",
+        "ISC",
+        "ISC0",
+        "ISC00",
+        "ISC001",
+        "ISC002",
+        "ISC003",
        "M",
        "M0",
        "M001",
@@ -696,6 +750,7 @@
        "PGH001",
        "PGH002",
        "PGH003",
+        "PGH004",
        "PLC",
        "PLC0",
        "PLC04",
@@ -776,6 +831,7 @@
        "RUF001",
        "RUF002",
        "RUF003",
+        "RUF004",
        "RUF1",
        "RUF10",
        "RUF100",
@@ -792,6 +848,9 @@
        "SIM1",
        "SIM11",
        "SIM118",
+        "SIM3",
+        "SIM30",
+        "SIM300",
        "T",
        "T1",
        "T10",
@@ -803,6 +862,7 @@
        "TID",
        "TID2",
        "TID25",
+        "TID251",
        "TID252",
        "U",
        "U0",
@@ -824,6 +884,7 @@
        "U015",
        "U016",
        "U017",
+        "U019",
        "UP",
        "UP0",
        "UP00",
@@ -845,6 +906,16 @@
        "UP016",
        "UP017",
        "UP018",
+        "UP019",
+        "UP02",
+        "UP020",
+        "UP021",
+        "UP022",
+        "UP023",
+        "UP024",
+        "UP025",
+        "UP026",
+        "UP027",
        "W",
        "W2",
        "W29",
@@ -871,6 +942,24 @@
        "YTT303"
      ]
    },
+    "Convention": {
+      "oneOf": [
+        {
+          "description": "Use Google-style docstrings.",
+          "type": "string",
+          "enum": [
+            "google"
+          ]
+        },
+        {
+          "description": "Use NumPy-style docstrings.",
+          "type": "string",
+          "enum": [
+            "numpy"
+          ]
+        }
+      ]
+    },
    "Flake8AnnotationsOptions": {
      "type": "object",
      "properties": {
@@ -1012,7 +1101,7 @@
      "type": "object",
      "properties": {
        "ban-relative-imports": {
-          "description": "Whether to ban all relative imports (`\"all\"`), or only those imports that extend into the parent module and beyond (`\"parents\"`).",
+          "description": "Whether to ban all relative imports (`\"all\"`), or only those imports that extend into the parent module or beyond (`\"parents\"`).",
          "anyOf": [
            {
              "$ref": "#/definitions/Strictness"
@@ -1021,6 +1110,16 @@
              "type": "null"
            }
          ]
+        },
+        "banned-api": {
+          "description": "Specific modules or module members that may not be imported or accessed. Note that this check is only meant to flag accidental uses, and can be circumvented via `eval` or `importlib`.",
+          "type": [
+            "object",
+            "null"
+          ],
+          "additionalProperties": {
+            "$ref": "#/definitions/BannedApi"
+          }
        }
      },
      "additionalProperties": false
@@ -1058,6 +1157,13 @@
            "type": "string"
          }
        },
+        "force-single-line": {
+          "description": "Forces all from imports to appear on their own line.",
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
        "force-wrap-aliases": {
          "description": "Force `import from` statements with multiple members and at least one alias (e.g., `import A as B`) to wrap such that every line contains exactly one member. For example, this formatting would be retained, rather than condensing to a single line:\n\n```py from .utils import ( test_directory as test_directory, test_id as test_id ) ```\n\nNote that this setting is only effective when combined with `combine-as-imports = true`. When `combine-as-imports` isn't enabled, every aliased `import from` will be given its own line, in which case, wrapping is not necessary.",
          "type": [
@@ -1084,6 +1190,23 @@
          "items": {
            "type": "string"
          }
+        },
+        "single-line-exclusions": {
+          "description": "One or more modules to exclude from the single line rule.",
+          "type": [
+            "array",
+            "null"
+          ],
+          "items": {
+            "type": "string"
+          }
+        },
+        "split-on-trailing-comma": {
+          "description": "If a comma is placed after the last member in a multi-line import, then the imports will never be folded into one line.\n\nSee isort's [`split-on-trailing-comma`](https://pycqa.github.io/isort/docs/configuration/options.html#split-on-trailing-comma) option.",
+          "type": [
+            "boolean",
+            "null"
+          ]
        }
      },
      "additionalProperties": false
@@ -1152,6 +1275,23 @@
      },
      "additionalProperties": false
    },
+    "Pydocstyle": {
+      "type": "object",
+      "properties": {
+        "convention": {
+          "description": "Whether to use Google-style or Numpy-style conventions when detecting docstring sections. By default, conventions will be inferred from the available sections.",
+          "anyOf": [
+            {
+              "$ref": "#/definitions/Convention"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "additionalProperties": false
+    },
    "PythonVersion": {
      "type": "string",
      "enum": [
@@ -1167,10 +1307,21 @@
      ]
    },
    "Quote": {
-      "type": "string",
-      "enum": [
-        "single",
-        "double"
+      "oneOf": [
+        {
+          "description": "Use single quotes (`'`).",
+          "type": "string",
+          "enum": [
+            "single"
+          ]
+        },
+        {
+          "description": "Use double quotes (`\"`).",
+          "type": "string",
+          "enum": [
+            "double"
+          ]
+        }
      ]
    },
    "SerializationFormat": {
@@ -1180,15 +1331,30 @@
        "json",
        "junit",
        "grouped",
-        "github"
+        "github",
+        "gitlab"
      ]
    },
    "Strictness": {
-      "type": "string",
-      "enum": [
-        "parents",
-        "all"
+      "oneOf": [
+        {
+          "description": "Ban imports that extend into the parent module or beyond.",
+          "type": "string",
+          "enum": [
+            "parents"
+          ]
+        },
+        {
+          "description": "Ban all relative imports.",
+          "type": "string",
+          "enum": [
+            "all"
+          ]
+        }
      ]
+    },
+    "Version": {
+      "type": "string"
    }
  }
 }
--- a/ruff_dev/Cargo.toml
+++ b/ruff_dev/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff_dev"
-version = "0.0.193"
+version = "0.0.207"
 edition = "2021"

 [dependencies]
@@ -11,10 +11,11 @@ itertools = { version = "0.10.5" }
 libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "f2f0b7a487a8725d161fe8b3ed73a6758b21e177" }
 once_cell = { version = "1.16.0" }
 ruff = { path = ".." }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "1b6cb170e925a43d605b3fed9f6b878e63e47744" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "1b6cb170e925a43d605b3fed9f6b878e63e47744" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "1b6cb170e925a43d605b3fed9f6b878e63e47744" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "71becd4059fdce4bce7010f1208ed3b1c883abba" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "71becd4059fdce4bce7010f1208ed3b1c883abba" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "71becd4059fdce4bce7010f1208ed3b1c883abba" }
 schemars = { version = "0.8.11" }
 serde_json = {version="1.0.91"}
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
+textwrap = { version = "0.16.0" }
--- a/ruff_dev/src/generate_all.rs
+++ b/ruff_dev/src/generate_all.rs
@@ -0,0 +1,35 @@
+//! Run all code and documentation generation steps.
+
+use anyhow::Result;
+use clap::Args;
+
+use crate::{
+    generate_check_code_prefix, generate_cli_help, generate_json_schema, generate_options,
+    generate_rules_table,
+};
+
+#[derive(Args)]
+pub struct Cli {
+    /// Write the generated artifacts to stdout (rather than to the filesystem).
+    #[arg(long)]
+    dry_run: bool,
+}
+
+pub fn main(cli: &Cli) -> Result<()> {
+    generate_check_code_prefix::main(&generate_check_code_prefix::Cli {
+        dry_run: cli.dry_run,
+    })?;
+    generate_json_schema::main(&generate_json_schema::Cli {
+        dry_run: cli.dry_run,
+    })?;
+    generate_rules_table::main(&generate_rules_table::Cli {
+        dry_run: cli.dry_run,
+    })?;
+    generate_options::main(&generate_options::Cli {
+        dry_run: cli.dry_run,
+    })?;
+    generate_cli_help::main(&generate_cli_help::Cli {
+        dry_run: cli.dry_run,
+    })?;
+    Ok(())
+}
--- a/ruff_dev/src/generate_check_code_prefix.rs
+++ b/ruff_dev/src/generate_check_code_prefix.rs
@@ -13,13 +13,15 @@ use itertools::Itertools;
 use ruff::checks::{CheckCode, PREFIX_REDIRECTS};
 use strum::IntoEnumIterator;

+const ALL: &str = "ALL";
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 pub struct Cli {
    /// Write the generated source code to stdout (rather than to
    /// `src/checks_gen.rs`).
    #[arg(long)]
-    dry_run: bool,
+    pub(crate) dry_run: bool,
 }

 pub fn main(cli: &Cli) -> Result<()> {
@@ -34,9 +36,15 @@ pub fn main(cli: &Cli) -> Result<()> {
        let code_suffix_len = code_str.len() - code_prefix_len;
        for i in 0..=code_suffix_len {
            let prefix = code_str[..code_prefix_len + i].to_string();
-            let entry = prefix_to_codes.entry(prefix).or_default();
-            entry.insert(check_code.clone());
+            prefix_to_codes
+                .entry(prefix)
+                .or_default()
+                .insert(check_code.clone());
        }
+        prefix_to_codes
+            .entry(ALL.to_string())
+            .or_default()
+            .insert(check_code.clone());
    }

    // Add any prefix aliases (e.g., "U" to "UP").
@@ -79,6 +87,7 @@ pub fn main(cli: &Cli) -> Result<()> {
        .derive("Eq")
        .derive("PartialOrd")
        .derive("Ord")
+        .push_variant(Variant::new("None"))
        .push_variant(Variant::new("Zero"))
        .push_variant(Variant::new("One"))
        .push_variant(Variant::new("Two"))
@@ -129,14 +138,18 @@ pub fn main(cli: &Cli) -> Result<()> {
        .line("#[allow(clippy::match_same_arms)]")
        .line("match self {");
    for prefix in prefix_to_codes.keys() {
-        let num_numeric = prefix.chars().filter(|char| char.is_numeric()).count();
-        let specificity = match num_numeric {
-            0 => "Zero",
-            1 => "One",
-            2 => "Two",
-            3 => "Three",
-            4 => "Four",
-            _ => panic!("Invalid prefix: {prefix}"),
+        let specificity = if prefix == "ALL" {
+            "None"
+        } else {
+            let num_numeric = prefix.chars().filter(|char| char.is_numeric()).count();
+            match num_numeric {
+                0 => "Zero",
+                1 => "One",
+                2 => "Two",
+                3 => "Three",
+                4 => "Four",
+                _ => panic!("Invalid prefix: {prefix}"),
+            }
        };
        gen = gen.line(format!(
            "CheckCodePrefix::{prefix} => SuffixLength::{specificity},"
--- a/ruff_dev/src/generate_cli_help.rs
+++ b/ruff_dev/src/generate_cli_help.rs
@@ -0,0 +1,38 @@
+//! Generate CLI help.
+
+use anyhow::Result;
+use clap::{Args, CommandFactory};
+use ruff::cli::Cli as MainCli;
+
+use crate::utils::replace_readme_section;
+
+const HELP_BEGIN_PRAGMA: &str = "<!-- Begin auto-generated cli help. -->";
+const HELP_END_PRAGMA: &str = "<!-- End auto-generated cli help. -->";
+
+#[derive(Args)]
+pub struct Cli {
+    /// Write the generated help to stdout (rather than to `README.md`).
+    #[arg(long)]
+    pub(crate) dry_run: bool,
+}
+
+fn trim_lines(s: &str) -> String {
+    s.lines().map(str::trim_end).collect::<Vec<_>>().join("\n")
+}
+
+pub fn main(cli: &Cli) -> Result<()> {
+    let mut cmd = MainCli::command();
+    let output = trim_lines(cmd.render_help().to_string().trim());
+
+    if cli.dry_run {
+        print!("{output}");
+    } else {
+        replace_readme_section(
+            &format!("```shell\n{output}\n```\n"),
+            HELP_BEGIN_PRAGMA,
+            HELP_END_PRAGMA,
+        )?;
+    }
+
+    Ok(())
+}
--- a/ruff_dev/src/generate_json_schema.rs
+++ b/ruff_dev/src/generate_json_schema.rs
@@ -10,7 +10,7 @@ use schemars::schema_for;
 pub struct Cli {
    /// Write the generated table to stdout (rather than to `ruff.schema.json`).
    #[arg(long)]
-    dry_run: bool,
+    pub(crate) dry_run: bool,
 }

 pub fn main(cli: &Cli) -> Result<()> {
--- a/ruff_dev/src/generate_options.rs
+++ b/ruff_dev/src/generate_options.rs
@@ -1,16 +1,13 @@
 //! Generate a Markdown-compatible listing of configuration options.

-use std::fs;
-use std::fs::OpenOptions;
-use std::io::Write;
-use std::path::PathBuf;
-
 use anyhow::Result;
 use clap::Args;
 use itertools::Itertools;
 use ruff::settings::options::Options;
 use ruff::settings::options_base::{ConfigurationOptions, OptionEntry, OptionField};

+use crate::utils::replace_readme_section;
+
 const BEGIN_PRAGMA: &str = "<!-- Begin auto-generated options sections. -->";
 const END_PRAGMA: &str = "<!-- End auto-generated options sections. -->";

@@ -18,7 +15,7 @@ const END_PRAGMA: &str = "<!-- End auto-generated options sections. -->";
 pub struct Cli {
    /// Write the generated table to stdout (rather than to `README.md`).
    #[arg(long)]
-    dry_run: bool,
+    pub(crate) dry_run: bool,
 }

 fn emit_field(output: &mut String, field: &OptionField, group_name: Option<&str>) {
@@ -95,30 +92,7 @@ pub fn main(cli: &Cli) -> Result<()> {
    if cli.dry_run {
        print!("{output}");
    } else {
-        // Read the existing 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
-            .find(BEGIN_PRAGMA)
-            .expect("Unable to find begin pragma");
-        let prefix = &existing[..index + BEGIN_PRAGMA.len()];
-
-        // Extract the suffix.
-        let index = existing
-            .find(END_PRAGMA)
-            .expect("Unable to find end pragma");
-        let suffix = &existing[index..];
-
-        // Write the prefix, new contents, and suffix.
-        let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
-        write!(f, "{prefix}\n\n")?;
-        write!(f, "{output}")?;
-        write!(f, "{suffix}")?;
+        replace_readme_section(&output, BEGIN_PRAGMA, END_PRAGMA)?;
    }

    Ok(())
--- a/ruff_dev/src/generate_rules_table.rs
+++ b/ruff_dev/src/generate_rules_table.rs
@@ -1,16 +1,13 @@
 //! Generate a Markdown-compatible table of supported lint rules.

-use std::fs;
-use std::fs::OpenOptions;
-use std::io::Write;
-use std::path::PathBuf;
-
 use anyhow::Result;
 use clap::Args;
 use itertools::Itertools;
 use ruff::checks::{CheckCategory, CheckCode};
 use strum::IntoEnumIterator;

+use crate::utils::replace_readme_section;
+
 const TABLE_BEGIN_PRAGMA: &str = "<!-- Begin auto-generated sections. -->";
 const TABLE_END_PRAGMA: &str = "<!-- End auto-generated sections. -->";

@@ -21,7 +18,7 @@ const TOC_END_PRAGMA: &str = "<!-- End auto-generated table of contents. -->";
 pub struct Cli {
    /// Write the generated table to stdout (rather than to `README.md`).
    #[arg(long)]
-    dry_run: bool,
+    pub(crate) dry_run: bool,
 }

 pub fn main(cli: &Cli) -> Result<()> {
@@ -85,32 +82,3 @@ pub fn main(cli: &Cli) -> Result<()> {

    Ok(())
 }
-
-fn replace_readme_section(content: &str, begin_pragma: &str, end_pragma: &str) -> Result<()> {
-    // Read the existing 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
-        .find(begin_pragma)
-        .expect("Unable to find begin pragma");
-    let prefix = &existing[..index + begin_pragma.len()];
-
-    // Extract the suffix.
-    let index = existing
-        .find(end_pragma)
-        .expect("Unable to find end pragma");
-    let suffix = &existing[index..];
-
-    // Write the prefix, new contents, and suffix.
-    let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
-    writeln!(f, "{prefix}")?;
-    write!(f, "{content}")?;
-    write!(f, "{suffix}")?;
-
-    Ok(())
-}
--- a/ruff_dev/src/lib.rs
+++ b/ruff_dev/src/lib.rs
@@ -11,11 +11,14 @@
    clippy::too_many_lines
 )]

+pub mod generate_all;
 pub mod generate_check_code_prefix;
+pub mod generate_cli_help;
 pub mod generate_json_schema;
 pub mod generate_options;
 pub mod generate_rules_table;
-pub mod generate_source_code;
 pub mod print_ast;
 pub mod print_cst;
 pub mod print_tokens;
+pub mod round_trip;
+mod utils;
--- a/ruff_dev/src/main.rs
+++ b/ruff_dev/src/main.rs
@@ -14,8 +14,8 @@
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 use ruff_dev::{
-    generate_check_code_prefix, generate_json_schema, generate_options, generate_rules_table,
-    generate_source_code, print_ast, print_cst, print_tokens,
+    generate_all, generate_check_code_prefix, generate_cli_help, generate_json_schema,
+    generate_options, generate_rules_table, print_ast, print_cst, print_tokens, round_trip,
 };

 #[derive(Parser)]
@@ -28,6 +28,8 @@ struct Cli {

 #[derive(Subcommand)]
 enum Commands {
+    /// Run all code and documentation generation steps.
+    GenerateAll(generate_all::Cli),
    /// Generate the `CheckCodePrefix` enum.
    GenerateCheckCodePrefix(generate_check_code_prefix::Cli),
    /// Generate JSON schema for the TOML configuration file.
@@ -36,27 +38,31 @@ enum Commands {
    GenerateRulesTable(generate_rules_table::Cli),
    /// Generate a Markdown-compatible listing of configuration options.
    GenerateOptions(generate_options::Cli),
-    /// Run round-trip source code generation on a given Python file.
-    GenerateSourceCode(generate_source_code::Cli),
+    /// Generate CLI help.
+    GenerateCliHelp(generate_cli_help::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),
+    /// Run round-trip source code generation on a given Python file.
+    RoundTrip(round_trip::Cli),
 }

 fn main() -> Result<()> {
    let cli = Cli::parse();
    match &cli.command {
+        Commands::GenerateAll(args) => generate_all::main(args)?,
        Commands::GenerateCheckCodePrefix(args) => generate_check_code_prefix::main(args)?,
        Commands::GenerateJSONSchema(args) => generate_json_schema::main(args)?,
        Commands::GenerateRulesTable(args) => generate_rules_table::main(args)?,
-        Commands::GenerateSourceCode(args) => generate_source_code::main(args)?,
        Commands::GenerateOptions(args) => generate_options::main(args)?,
+        Commands::GenerateCliHelp(args) => generate_cli_help::main(args)?,
        Commands::PrintAST(args) => print_ast::main(args)?,
        Commands::PrintCST(args) => print_cst::main(args)?,
        Commands::PrintTokens(args) => print_tokens::main(args)?,
+        Commands::RoundTrip(args) => round_trip::main(args)?,
    }
    Ok(())
 }
--- a/ruff_dev/src/generate_source_code.rs
+++ b/ruff_dev/src/generate_source_code.rs
@@ -5,7 +5,9 @@ use std::path::PathBuf;

 use anyhow::Result;
 use clap::Args;
-use ruff::code_gen::SourceGenerator;
+use ruff::source_code_generator::SourceCodeGenerator;
+use ruff::source_code_locator::SourceCodeLocator;
+use ruff::source_code_style::SourceCodeStyleDetector;
 use rustpython_parser::parser;

 #[derive(Args)]
@@ -18,7 +20,13 @@ pub struct Cli {
 pub fn main(cli: &Cli) -> Result<()> {
    let contents = fs::read_to_string(&cli.file)?;
    let python_ast = parser::parse_program(&contents, &cli.file.to_string_lossy())?;
-    let mut generator = SourceGenerator::new();
+    let locator = SourceCodeLocator::new(&contents);
+    let stylist = SourceCodeStyleDetector::from_contents(&contents, &locator);
+    let mut generator = SourceCodeGenerator::new(
+        stylist.indentation(),
+        stylist.quote(),
+        stylist.line_ending(),
+    );
    generator.unparse_suite(&python_ast);
    println!("{}", generator.generate()?);
    Ok(())
--- a/ruff_dev/src/utils.rs
+++ b/ruff_dev/src/utils.rs
@@ -0,0 +1,35 @@
+use std::fs;
+use std::fs::OpenOptions;
+use std::io::Write;
+use std::path::PathBuf;
+
+use anyhow::Result;
+
+pub fn replace_readme_section(content: &str, begin_pragma: &str, end_pragma: &str) -> Result<()> {
+    // Read the existing 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
+        .find(begin_pragma)
+        .expect("Unable to find begin pragma");
+    let prefix = &existing[..index + begin_pragma.len()];
+
+    // Extract the suffix.
+    let index = existing
+        .find(end_pragma)
+        .expect("Unable to find end pragma");
+    let suffix = &existing[index..];
+
+    // Write the prefix, new contents, and suffix.
+    let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
+    writeln!(f, "{prefix}")?;
+    write!(f, "{content}")?;
+    write!(f, "{suffix}")?;
+
+    Ok(())
+}
--- a/ruff_macros/Cargo.toml
+++ b/ruff_macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff_macros"
-version = "0.0.193"
+version = "0.0.207"
 edition = "2021"

 [lib]
--- a/src/ast/helpers.rs
+++ b/src/ast/helpers.rs
@@ -1,10 +1,11 @@
+use itertools::Itertools;
 use log::error;
 use once_cell::sync::Lazy;
 use regex::Regex;
 use rustc_hash::{FxHashMap, FxHashSet};
 use rustpython_ast::{
    Arguments, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprKind, Keyword, KeywordData,
-    Location, Stmt, StmtKind,
+    Located, Location, Stmt, StmtKind,
 };
 use rustpython_parser::lexer;
 use rustpython_parser::lexer::Tok;
@@ -211,6 +212,23 @@ pub fn is_constant_non_singleton(expr: &Expr) -> bool {
    is_constant(expr) && !is_singleton(expr)
 }

+/// Return `true` if an `Expr` is not a reference to a variable (or something
+/// that could resolve to a variable, like a function call).
+pub fn is_non_variable(expr: &Expr) -> bool {
+    matches!(
+        expr.node,
+        ExprKind::Constant { .. }
+            | ExprKind::Tuple { .. }
+            | ExprKind::List { .. }
+            | ExprKind::Set { .. }
+            | ExprKind::Dict { .. }
+            | ExprKind::SetComp { .. }
+            | ExprKind::ListComp { .. }
+            | ExprKind::DictComp { .. }
+            | ExprKind::GeneratorExp { .. }
+    )
+}
+
 /// Return the `Keyword` with the given name, if it's present in the list of
 /// `Keyword` arguments.
 pub fn find_keyword<'a>(keywords: &'a [Keyword], keyword_name: &str) -> Option<&'a Keyword> {
@@ -334,20 +352,17 @@ pub fn to_absolute(relative: Location, base: Location) -> Location {

 /// Return `true` if a `Stmt` has leading content.
 pub fn match_leading_content(stmt: &Stmt, locator: &SourceCodeLocator) -> bool {
-    let range = Range {
-        location: Location::new(stmt.location.row(), 0),
-        end_location: stmt.location,
-    };
+    let range = Range::new(Location::new(stmt.location.row(), 0), stmt.location);
    let prefix = locator.slice_source_code_range(&range);
    prefix.chars().any(|char| !char.is_whitespace())
 }

 /// Return `true` if a `Stmt` has trailing content.
 pub fn match_trailing_content(stmt: &Stmt, locator: &SourceCodeLocator) -> bool {
-    let range = Range {
-        location: stmt.end_location.unwrap(),
-        end_location: Location::new(stmt.end_location.unwrap().row() + 1, 0),
-    };
+    let range = Range::new(
+        stmt.end_location.unwrap(),
+        Location::new(stmt.end_location.unwrap().row() + 1, 0),
+    );
    let suffix = locator.slice_source_code_range(&range);
    for char in suffix.chars() {
        if char == '#' {
@@ -381,14 +396,9 @@ pub fn identifier_range(stmt: &Stmt, locator: &SourceCodeLocator) -> Range {
            | StmtKind::AsyncFunctionDef { .. }
    ) {
        let contents = locator.slice_source_code_range(&Range::from_located(stmt));
-        for (start, tok, end) in lexer::make_tokenizer(&contents).flatten() {
+        for (start, tok, end) in lexer::make_tokenizer_located(&contents, stmt.location).flatten() {
            if matches!(tok, Tok::Name { .. }) {
-                let start = to_absolute(start, stmt.location);
-                let end = to_absolute(end, stmt.location);
-                return Range {
-                    location: start,
-                    end_location: end,
-                };
+                return Range::new(start, end);
            }
        }
        error!("Failed to find identifier for {:?}", stmt);
@@ -396,6 +406,103 @@ pub fn identifier_range(stmt: &Stmt, locator: &SourceCodeLocator) -> Range {
    Range::from_located(stmt)
 }

+// Return the ranges of `Name` tokens within a specified node.
+pub fn find_names<T>(located: &Located<T>, locator: &SourceCodeLocator) -> Vec<Range> {
+    let contents = locator.slice_source_code_range(&Range::from_located(located));
+    lexer::make_tokenizer_located(&contents, located.location)
+        .flatten()
+        .filter(|(_, tok, _)| matches!(tok, Tok::Name { .. }))
+        .map(|(start, _, end)| Range {
+            location: start,
+            end_location: end,
+        })
+        .collect()
+}
+
+/// Return the `Range` of `name` in `Excepthandler`.
+pub fn excepthandler_name_range(
+    handler: &Excepthandler,
+    locator: &SourceCodeLocator,
+) -> Option<Range> {
+    let ExcepthandlerKind::ExceptHandler {
+        name, type_, body, ..
+    } = &handler.node;
+    match (name, type_) {
+        (Some(_), Some(type_)) => {
+            let type_end_location = type_.end_location.unwrap();
+            let contents =
+                locator.slice_source_code_range(&Range::new(type_end_location, body[0].location));
+            let range = lexer::make_tokenizer_located(&contents, type_end_location)
+                .flatten()
+                .tuple_windows()
+                .find(|(tok, next_tok)| {
+                    matches!(tok.1, Tok::As) && matches!(next_tok.1, Tok::Name { .. })
+                })
+                .map(|((..), (location, _, end_location))| Range::new(location, end_location));
+            range
+        }
+        _ => None,
+    }
+}
+
+/// Return the `Range` of `except` in `Excepthandler`.
+pub fn except_range(handler: &Excepthandler, locator: &SourceCodeLocator) -> Range {
+    let ExcepthandlerKind::ExceptHandler { body, type_, .. } = &handler.node;
+    let end = if let Some(type_) = type_ {
+        type_.location
+    } else {
+        body.first()
+            .expect("Expected body to be non-empty")
+            .location
+    };
+    let contents = locator.slice_source_code_range(&Range {
+        location: handler.location,
+        end_location: end,
+    });
+    let range = lexer::make_tokenizer_located(&contents, handler.location)
+        .flatten()
+        .find(|(_, kind, _)| matches!(kind, Tok::Except { .. }))
+        .map(|(location, _, end_location)| Range {
+            location,
+            end_location,
+        })
+        .expect("Failed to find `except` range");
+    range
+}
+
+/// Return the `Range` of `else` in `For`, `AsyncFor`, and `While` statements.
+pub fn else_range(stmt: &Stmt, locator: &SourceCodeLocator) -> Option<Range> {
+    match &stmt.node {
+        StmtKind::For { body, orelse, .. }
+        | StmtKind::AsyncFor { body, orelse, .. }
+        | StmtKind::While { body, orelse, .. }
+            if !orelse.is_empty() =>
+        {
+            let body_end = body
+                .last()
+                .expect("Expected body to be non-empty")
+                .end_location
+                .unwrap();
+            let contents = locator.slice_source_code_range(&Range {
+                location: body_end,
+                end_location: orelse
+                    .first()
+                    .expect("Expected orelse to be non-empty")
+                    .location,
+            });
+            let range = lexer::make_tokenizer_located(&contents, body_end)
+                .flatten()
+                .find(|(_, kind, _)| matches!(kind, Tok::Else))
+                .map(|(location, _, end_location)| Range {
+                    location,
+                    end_location,
+                });
+            range
+        }
+        _ => None,
+    }
+}
+
 /// Return `true` if a `Stmt` appears to be part of a multi-statement line, with
 /// other statements preceding it.
 pub fn preceded_by_continuation(stmt: &Stmt, locator: &SourceCodeLocator) -> bool {
@@ -405,10 +512,10 @@ pub fn preceded_by_continuation(stmt: &Stmt, locator: &SourceCodeLocator) -> boo
    // make conservative choices.
    // TODO(charlie): Come up with a more robust strategy.
    if stmt.location.row() > 1 {
-        let range = Range {
-            location: Location::new(stmt.location.row() - 1, 0),
-            end_location: Location::new(stmt.location.row(), 0),
-        };
+        let range = Range::new(
+            Location::new(stmt.location.row() - 1, 0),
+            Location::new(stmt.location.row(), 0),
+        );
        let line = locator.slice_source_code_range(&range);
        if line.trim().ends_with('\\') {
            return true;
@@ -436,7 +543,9 @@ mod tests {
    use rustpython_ast::Location;
    use rustpython_parser::parser;

-    use crate::ast::helpers::{identifier_range, match_module_member, match_trailing_content};
+    use crate::ast::helpers::{
+        else_range, identifier_range, match_module_member, match_trailing_content,
+    };
    use crate::ast::types::Range;
    use crate::source_code_locator::SourceCodeLocator;

@@ -630,10 +739,7 @@ y = 2
        let locator = SourceCodeLocator::new(contents);
        assert_eq!(
            identifier_range(stmt, &locator),
-            Range {
-                location: Location::new(1, 4),
-                end_location: Location::new(1, 5),
-            }
+            Range::new(Location::new(1, 4), Location::new(1, 5),)
        );

        let contents = r#"
@@ -647,10 +753,7 @@ def \
        let locator = SourceCodeLocator::new(contents);
        assert_eq!(
            identifier_range(stmt, &locator),
-            Range {
-                location: Location::new(2, 2),
-                end_location: Location::new(2, 3),
-            }
+            Range::new(Location::new(2, 2), Location::new(2, 3),)
        );

        let contents = "class Class(): pass".trim();
@@ -659,10 +762,7 @@ def \
        let locator = SourceCodeLocator::new(contents);
        assert_eq!(
            identifier_range(stmt, &locator),
-            Range {
-                location: Location::new(1, 6),
-                end_location: Location::new(1, 11),
-            }
+            Range::new(Location::new(1, 6), Location::new(1, 11),)
        );

        let contents = "class Class: pass".trim();
@@ -671,10 +771,7 @@ def \
        let locator = SourceCodeLocator::new(contents);
        assert_eq!(
            identifier_range(stmt, &locator),
-            Range {
-                location: Location::new(1, 6),
-                end_location: Location::new(1, 11),
-            }
+            Range::new(Location::new(1, 6), Location::new(1, 11),)
        );

        let contents = r#"
@@ -688,10 +785,7 @@ class Class():
        let locator = SourceCodeLocator::new(contents);
        assert_eq!(
            identifier_range(stmt, &locator),
-            Range {
-                location: Location::new(2, 6),
-                end_location: Location::new(2, 11),
-            }
+            Range::new(Location::new(2, 6), Location::new(2, 11),)
        );

        let contents = r#"x = y + 1"#.trim();
@@ -700,12 +794,29 @@ class Class():
        let locator = SourceCodeLocator::new(contents);
        assert_eq!(
            identifier_range(stmt, &locator),
-            Range {
-                location: Location::new(1, 0),
-                end_location: Location::new(1, 9),
-            }
+            Range::new(Location::new(1, 0), Location::new(1, 9),)
        );

        Ok(())
    }
+
+    #[test]
+    fn test_else_range() -> Result<()> {
+        let contents = r#"
+for x in y:
+    pass
+else:
+    pass
+"#
+        .trim();
+        let program = parser::parse_program(contents, "<filename>")?;
+        let stmt = program.first().unwrap();
+        let locator = SourceCodeLocator::new(contents);
+        let range = else_range(stmt, &locator).unwrap();
+        assert_eq!(range.location.row(), 3);
+        assert_eq!(range.location.column(), 0);
+        assert_eq!(range.end_location.row(), 3);
+        assert_eq!(range.end_location.column(), 4);
+        Ok(())
+    }
 }
--- a/src/ast/types.rs
+++ b/src/ast/types.rs
@@ -22,12 +22,16 @@ pub struct Range {
 }

 impl Range {
-    pub fn from_located<T>(located: &Located<T>) -> Self {
-        Range {
-            location: located.location,
-            end_location: located.end_location.unwrap(),
+    pub fn new(location: Location, end_location: Location) -> Self {
+        Self {
+            location,
+            end_location,
        }
    }
+
+    pub fn from_located<T>(located: &Located<T>) -> Self {
+        Range::new(located.location, located.end_location.unwrap())
+    }
 }

 #[derive(Debug)]
--- a/src/ast/visitor.rs
+++ b/src/ast/visitor.rs
@@ -38,6 +38,9 @@ pub trait Visitor<'a> {
    fn visit_excepthandler(&mut self, excepthandler: &'a Excepthandler) {
        walk_excepthandler(self, excepthandler);
    }
+    fn visit_format_spec(&mut self, format_spec: &'a Expr) {
+        walk_expr(self, format_spec);
+    }
    fn visit_arguments(&mut self, arguments: &'a Arguments) {
        walk_arguments(self, arguments);
    }
@@ -387,7 +390,7 @@ pub fn walk_expr<'a, V: Visitor<'a> + ?Sized>(visitor: &mut V, expr: &'a Expr) {
        } => {
            visitor.visit_expr(value);
            if let Some(expr) = format_spec {
-                visitor.visit_expr(expr);
+                visitor.visit_format_spec(expr);
            }
        }
        ExprKind::JoinedStr { values } => {
--- a/src/ast/whitespace.rs
+++ b/src/ast/whitespace.rs
@@ -9,10 +9,10 @@ use crate::checkers::ast::Checker;
 /// Extract the leading indentation from a line.
 pub fn indentation<'a, T>(checker: &'a Checker, located: &'a Located<T>) -> Cow<'a, str> {
    let range = Range::from_located(located);
-    checker.locator.slice_source_code_range(&Range {
-        location: Location::new(range.location.row(), 0),
-        end_location: Location::new(range.location.row(), range.location.column()),
-    })
+    checker.locator.slice_source_code_range(&Range::new(
+        Location::new(range.location.row(), 0),
+        Location::new(range.location.row(), range.location.column()),
+    ))
 }

 /// Extract the leading words from a line of text.
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Charlie Marsh	f74050e5b1	Bump version to 0.0.207	2023-01-02 14:39:32 -05:00
Martin Fischer	90b2d85c85	Fix `__init__.py` being private (#1556 ) Previously visibility::module_visibility() returned Private for any module name starting with an underscore, resulting in __init__.py being categorized as private, which in turn resulted in D104 (Missing docstring in public package) never being reported for __init__.py files.	2023-01-02 14:39:23 -05:00
Charlie Marsh	ccf848705d	Detect unpacking assignments in eradicate (#1559 )	2023-01-02 14:05:58 -05:00
Charlie Marsh	3b535fcc74	Add explicit new-rule recommendation in CONTRIBUTING.md (#1558 )	2023-01-02 13:50:11 -05:00
Víctor	06321fd240	Add usage clarification to README (#1557 )	2023-01-02 13:40:16 -05:00
Martin Fischer	cdae2f0e67	Fix typing::match_annotated_subscript matching ExprKind::Call (#1554 )	2023-01-02 12:13:45 -05:00
Martin Fischer	f52691a90a	Print warning when running debug builds without --no-cache (#1549 )	2023-01-02 12:12:04 -05:00
Pedram Navid	07e47bef4b	Add flake8-simplify SIM300 check for Yoda Conditions (#1539 )	2023-01-01 18:37:40 -05:00
Anders Kaseorg	86b61806a5	Correct UP027 message to “generator expression” (#1540 )	2023-01-01 18:30:58 -05:00
Charlie Marsh	31ce37dd8e	Avoid PD false positives on some non-DataFrame expressions (#1538 )	2023-01-01 17:05:57 -05:00
Charlie Marsh	2cf6d05586	Avoid triggering PD errors on method calls (#1537 )	2023-01-01 17:00:17 -05:00
Colin Delahunty	65c34c56d6	Implement list-to-tuple comprehension unpacking (#1534 )	2023-01-01 16:53:26 -05:00
Charlie Marsh	2315db7d13	Bump version to 0.0.206	2023-01-01 16:39:29 -05:00
Charlie Marsh	f1a183c171	Rewrite mock.mock attribute accesses (#1533 )	2023-01-01 13:14:09 -05:00
Harutaka Kawamura	509c6d5ec7	Add `visit_format_spec` to avoid false positives for F541 in f-string format specifier (#1528 )	2023-01-01 13:03:32 -05:00
Maksudul Haque	6695988b59	Do not Change Quotation Style for `SIM118` Autofix (#1529 )	2023-01-01 12:53:46 -05:00
Harutaka Kawamura	e3867b172d	Simplify unused snapshot check (#1525 )	2023-01-01 02:43:07 -05:00
Harutaka Kawamura	4b8e30f350	Fix `Name` node range in `NamedExpr` node (#1526 )	2023-01-01 02:41:49 -05:00
Charlie Marsh	8fd0d8e9d8	Bump pyupgrade implementation count	2022-12-31 21:25:34 -05:00
Colin Delahunty	70895a8f1e	Pyupgrade: `import mock` to `from unittest import mock` (#1488 )	2022-12-31 21:25:06 -05:00
Charlie Marsh	f2c9f94f73	Avoid some false positives for ends-in-period checks (#1521 )	2022-12-31 18:38:22 -05:00
Charlie Marsh	605c6069e2	Ignore property assignments in RET504 (#1520 )	2022-12-31 18:04:13 -05:00
Charlie Marsh	92c2981b6d	Add dark mode variant for benchmark image (#1519 )	2022-12-31 17:47:32 -05:00
Colin Delahunty	4ad8db3d61	Pyupgrade: Turn errors into OSError (#1434 )	2022-12-31 16:36:05 -05:00
Charlie Marsh	0e8c237167	Bump version to 0.0.205	2022-12-31 13:44:39 -05:00
Harutaka Kawamura	960c5e2006	Use more precise error ranges for names (#1513 )	2022-12-31 13:42:39 -05:00
Charlie Marsh	9ba17fbf92	Avoid flagging nested f-strings (#1516 )	2022-12-31 13:41:21 -05:00
Charlie Marsh	bfdf972a5d	Add code kind to Quick Fix action	2022-12-31 10:26:47 -05:00
Charlie Marsh	0c215365ae	Bump version to 0.0.204	2022-12-31 08:20:09 -05:00
Maksudul Haque	815284f890	Check for Unsupported Files and Display Errors and Warnings (#1509 )	2022-12-31 08:12:55 -05:00
Charlie Marsh	6880338a9a	Restore pyproject.toml	2022-12-31 08:06:08 -05:00
Charlie Marsh	68b749c67d	Remove foo directory	2022-12-31 08:05:04 -05:00
Reiner Gerecke	c0fc55b812	Generate source code with detected line ending (#1487 )	2022-12-31 08:02:29 -05:00
Reiner Gerecke	ba9cf70917	Adjust `test_path` helper to detect round-trip autofix issues (#1501 )	2022-12-31 08:02:13 -05:00
Harutaka Kawamura	f73dfbbfd3	Fix E722 and F707 ranges (#1508 )	2022-12-31 07:58:46 -05:00
Reiner Gerecke	62c273cd22	Include fix commit message when showing violations together with source (#1505 )	2022-12-31 07:54:41 -05:00
Harutaka Kawamura	938ad9a39e	Fix N818 range (#1503 )	2022-12-31 07:43:03 -05:00
Harutaka Kawamura	14248cb8cb	Improve PLW0120 range (#1500 )	2022-12-31 07:42:49 -05:00
Harutaka Kawamura	3a280039e1	Improve F811 range for function and class definitions (#1499 )	2022-12-31 07:42:18 -05:00
Harutaka Kawamura	4e9e58bdc0	Improve `T20X` ranges (#1502 )	2022-12-31 07:41:53 -05:00
Harutaka Kawamura	926b5494ad	Remove unused snapshots (#1497 )	2022-12-31 07:40:38 -05:00
Reiner Gerecke	6717b48ca5	Fix detection of changed imports in isort plugin (#1504 )	2022-12-31 07:37:27 -05:00
Harutaka Kawamura	f7bb5bc858	Remove F831 (#1495 )	2022-12-30 23:57:51 -05:00
Harutaka Kawamura	3e23fd1487	Stop overriding locations for expressions within f-strings (#1494 )	2022-12-30 23:43:59 -05:00
Charlie Marsh	01c74e0629	Add a "fix message" to every autofix-able check (#1489 )	2022-12-30 23:16:03 -05:00
Charlie Marsh	1e3cf87f67	Escape strings when formatting check messages (#1493 )	2022-12-30 22:11:01 -05:00
Charlie Marsh	248447e139	Trim CLI help during generation (#1492 )	2022-12-30 22:03:58 -05:00
Charlie Marsh	95f139583a	Modify pyproject.toml to meet schema compliance	2022-12-30 15:51:35 -05:00
Charlie Marsh	74903f23d6	Bump version to 0.0.203	2022-12-30 15:33:30 -05:00
Charlie Marsh	3ee20a70d3	Remove lingering ruff_options.ts references	2022-12-30 15:33:09 -05:00
Charlie Marsh	4c2fbb7ac0	Remove hidden autoformat command (#1486 )	2022-12-30 15:32:05 -05:00
Charlie Marsh	7a66f98590	Move some argument validation into Clap (#1485 )	2022-12-30 15:29:41 -05:00
Charlie Marsh	a2bf3916f3	Make clean a standalone command	2022-12-30 15:20:18 -05:00
Reiner Gerecke	c9aa7b9308	Generate the README's --help output automatically via cargo +nightly dev generate-all (#1483 )	2022-12-30 15:06:32 -05:00
Charlie Marsh	d880ca6cc6	Add a command to clear the Ruff cache (#1484 )	2022-12-30 13:52:16 -05:00
Reiner Gerecke	080f99b908	Detect line endings and use them during code generation (#1482 )	2022-12-30 12:59:40 -05:00
Charlie Marsh	a7dc491ff1	Fix clippy	2022-12-30 12:34:43 -05:00
Charlie Marsh	cdc8f8c91a	Remove support for `ur` prefixes (#1481 )	2022-12-30 11:21:05 -05:00
Colin Delahunty	138c46e793	Simplified code for unicode fix (#1475 )	2022-12-30 11:18:52 -05:00
Charlie Marsh	a86c57a832	Support multi-line `noqa` directives for 'import from' (#1479 )	2022-12-30 11:16:50 -05:00
Charlie Marsh	818582fe8a	Bump version to 0.0.202	2022-12-30 08:16:32 -05:00
Charlie Marsh	90574c1088	Set editor background on top-level component (#1478 )	2022-12-30 07:55:54 -05:00
Charlie Marsh	3061a35e7c	Use more precise ranges for class and function checks (#1476 )	2022-12-30 07:39:20 -05:00
Martin Fischer	87681697ae	Improve CLI help for `--select` (#1471 )	2022-12-30 07:16:44 -05:00
Martin Fischer	e9ec2a7b36	Add `use test_case::test_case;` to CONTRIBUTING.md I previously tried adding the #[test_case()] attribute macro and got confused because the Rust compilation suddenly failed with: error[E0658]: use of unstable library feature 'custom_test_frameworks': custom test frameworks are an unstable feature which is a quite confusing error message. The solution is to just add `use test_case::test_case;`, so this commit adds that line to the example in CONTRIBUTING.md to spare others this source of confusion.	2022-12-30 07:13:48 -05:00
Martin Fischer	b0bb75dc1c	Add --select to command suggested in CONTRIBUTING.md By default only E* and F* lints are enabled. I previously followed the CONTRIBUTING.md instructions to implement a TID* lint and was confused why my lint wasn't being run.	2022-12-30 07:13:48 -05:00
Martin Fischer	ebca5c2df8	Make banned-api config setting optional (#1465 )	2022-12-30 07:09:56 -05:00
Charlie Marsh	16b10c42f0	Fix lint issues	2022-12-29 23:12:28 -05:00
Charlie Marsh	4a6e5d1549	Bump version to 0.0.201	2022-12-29 23:01:35 -05:00
Charlie Marsh	b078050732	Implicit flake8-implicit-str-concat (#1463 )	2022-12-29 23:00:55 -05:00
Charlie Marsh	5f796b39b4	Run cargo fmt	2022-12-29 22:25:14 -05:00
Martin Fischer	9d34da23bd	Implement TID251 (banning modules & module members) (#1436 )	2022-12-29 22:11:12 -05:00
Charlie Marsh	bde12c3bb3	Restore quick fixes for playground	2022-12-29 20:16:19 -05:00
Colin Delahunty	f735660801	Removed unicode literals (#1448 )	2022-12-29 20:11:33 -05:00
Charlie Marsh	34cd22dfc1	Copy URL but don't update the hash (#1458 )	2022-12-29 19:46:50 -05:00
Charlie Marsh	9fafe16a55	Re-add GitHub badge to the bottom of the page	2022-12-29 19:38:33 -05:00
Charlie Marsh	e9a4cb1c1d	Remove generated TypeScript options (#1456 )	2022-12-29 19:37:49 -05:00
Charlie Marsh	9db825c731	Use trailingComma: 'all' (#1457 )	2022-12-29 19:36:51 -05:00
Charlie Marsh	2c7464604a	Implement dark mode (#1455 )	2022-12-29 19:33:46 -05:00
Charlie Marsh	cd2099f772	Move default options into WASM interface (#1453 )	2022-12-29 18:06:57 -05:00
Adam Turner	091d36cd30	Add Sphinx to user list (#1451 )	2022-12-29 18:06:09 -05:00
Mathieu Kniewallner	02f156c6cb	docs(README): add missing `flake8-simplify` (#1449 )	2022-12-29 17:02:26 -05:00
Charlie Marsh	9f7350961e	Rename config to settings in the playground (#1450 )	2022-12-29 16:59:38 -05:00
Charlie Marsh	118a93260a	Bump version to 0.0.200	2022-12-29 13:31:23 -05:00
Charlie Marsh	1c16255884	Include docstrings for settings enum members (#1446 )	2022-12-29 13:15:44 -05:00
Charlie Marsh	16c4552946	Update snapshots	2022-12-29 13:13:43 -05:00
Charlie Marsh	0ba3989b3d	Make update check enablement cofnigurable (#1445 )	2022-12-29 13:06:22 -05:00
Charlie Marsh	3435e15cba	Avoid caching diffs (#1441 )	2022-12-29 12:51:58 -05:00
Maksudul Haque	781bbbc286	[pygrep-hooks] Adds Check for Blanket `# noqa` (#1440 )	2022-12-29 12:43:16 -05:00
Charlie Marsh	acf0b82f19	Re-style the Ruff playground (#1438 )	2022-12-29 11:47:27 -05:00
Charlie Marsh	057414ddd4	Bump version to 0.0.199	2022-12-28 20:58:43 -05:00
Charlie Marsh	ca94e9aa26	Warn the user when max iteration count is reached (#1433 )	2022-12-28 20:56:43 -05:00
Charlie Marsh	797b5bd261	Split into lint and lint-and-fix methods (#1432 )	2022-12-28 20:14:33 -05:00
Charlie Marsh	a64f62f439	Revert setup.py change	2022-12-28 19:34:20 -05:00
Charlie Marsh	058ee8e6bf	Add a --diff flag to dry-run autofixes (#1431 )	2022-12-28 19:21:29 -05:00
Charlie Marsh	39fc1f0c1b	Add a note on autofix settings	2022-12-28 17:26:38 -05:00
Colin Delahunty	34842b4c4b	PyUpgrade: Replace pipes with `capture_output=True` (#1415 )	2022-12-28 16:53:35 -05:00
Charlie Marsh	dfa6fa8f83	Check in updated snapshots	2022-12-28 16:42:55 -05:00
Colin Delahunty	6131c819ed	Rewrite xml.etree.cElementTree to xml.etree.ElementTree (#1426 )	2022-12-28 16:30:36 -05:00
Hannes Käufler	79ba420faa	Extract duplicated logic into method (#1428 )	2022-12-28 16:10:53 -05:00
Charlie Marsh	d16ba890ae	Turn off wasm-pack tests (#1427 )	2022-12-28 12:55:25 -05:00
Charlie Marsh	6b6851bf1f	Update JSON schema	2022-12-28 12:27:01 -05:00
Charlie Marsh	056718ce75	Remove stray Plugins doc	2022-12-28 12:24:48 -05:00
Charlie Marsh	4521fdf021	Only test --lib for wasm-pack	2022-12-28 10:28:40 -05:00
Maksudul Haque	8e479628f2	Add Support for GitLab CI Code Quality Report Format (#1424 )	2022-12-28 10:10:43 -05:00
Charlie Marsh	2a11c4b1f1	Try increasing wasm-bindgen timeout	2022-12-28 07:39:23 -05:00
Anders Kaseorg	a8cde5a936	Check for keyword arguments before the last star argument (#1420 )	2022-12-27 23:20:03 -05:00
Charlie Marsh	1822b57ed5	Remove 'static	2022-12-27 21:57:32 -05:00
Charlie Marsh	c679570041	Bump version to 0.0.198	2022-12-27 21:39:53 -05:00
Charlie Marsh	edcb3a7217	Support --select ALL to enable all error codes (#1418 )	2022-12-27 21:38:26 -05:00
Charlie Marsh	6e43dc7270	Add nbQA support to the docs (#1417 )	2022-12-27 21:24:07 -05:00
Charlie Marsh	570d0864f2	Add rule to detect keyword arguments before starred arguments (#1416 )	2022-12-27 21:17:22 -05:00
Charlie Marsh	d22e96916c	Automatically detect and respect indentation and quotation code style (#1413 )	2022-12-27 19:45:50 -05:00
Charlie Marsh	043d31dcdf	Bump version to 0.0.197	2022-12-27 17:05:15 -05:00
Charlie Marsh	1392e4cced	Default to double quotes in `code_gen.rs` (#1412 )	2022-12-27 16:17:49 -05:00
Charlie Marsh	59ee89a091	Fix it_converts_docstring_conventions test	2022-12-27 15:41:29 -05:00
Charlie Marsh	6a7c3728ee	Set convention in flake8-to-ruff (#1410 )	2022-12-27 13:51:24 -05:00
Charlie Marsh	0a60eb0aca	Fix invalid reference to ruff_options.rs (#1409 )	2022-12-27 12:12:28 -05:00
Charlie Marsh	3e96803033	Bump version to 0.0.196	2022-12-27 12:02:02 -05:00
Colin Delahunty	c59035139c	Pyupgrade: converts `universal_newlines` to `text` in `subprocess.run` (#1403 )	2022-12-27 12:01:27 -05:00
Charlie Marsh	7632d7eda7	Allow specification of explicit docstring convention (#1408 )	2022-12-27 11:50:28 -05:00
Charlie Marsh	b4dbe62da0	Add cargo +nightly dev generate-all (#1404 )	2022-12-27 10:07:18 -05:00
Harutaka Kawamura	9106d5338b	Replace `make_tokenize` with `make_tokenizer_located` (#1405 )	2022-12-27 10:07:03 -05:00
Reiner Gerecke	534d8d049c	Support isort's force-single-line option (#1366 )	2022-12-27 08:51:32 -05:00
Charlie Marsh	e692c4a2cc	Tweak secret detection for playground releases (#1402 )	2022-12-27 08:41:53 -05:00
Reiner Gerecke	e0b39fa63e	Implement pyupgrade check for io.open alias (#1399 )	2022-12-27 07:47:40 -05:00
Charlie Marsh	320a48977b	Tweak README again	2022-12-26 21:17:18 -05:00
Charlie Marsh	0d05aaeb6e	Add monorepo note	2022-12-26 21:00:14 -05:00
Charlie Marsh	1e4b1533ad	Bump version to 0.0.195	2022-12-26 20:41:39 -05:00
Charlie Marsh	df4f5358f9	Bump pyupgrade implementation count	2022-12-26 19:56:12 -05:00
Colin Delahunty	58c383401c	Replace `typing.Text` with `str` (#1391 )	2022-12-26 19:55:41 -05:00
Charlie Marsh	018b9a2977	Only run playground release in main repo (#1396 )	2022-12-26 19:45:04 -05:00
Charlie Marsh	658cb87ddd	Enable Quick Fix in the playground (#1395 )	2022-12-26 19:25:50 -05:00
Charlie Marsh	0d35087bc6	Choose a more interesting example snippet (#1394 )	2022-12-26 15:19:17 -05:00
Charlie Marsh	b721125af9	Add badge to playground (#1393 )	2022-12-26 15:13:55 -05:00
Charlie Marsh	20d6b21d77	Add ESLint, Prettier, and TypeScript checks (#1384 )	2022-12-26 15:08:22 -05:00
Charlie Marsh	1a27992f47	Enable preview deployments for playground (#1383 )	2022-12-26 14:52:13 -05:00
Charlie Marsh	89cebe1ce2	Update name of Playground job	2022-12-26 12:10:22 -05:00
Reiner Gerecke	bdb1505262	Web playground with WASM (#1279 )	2022-12-26 12:09:17 -05:00
Charlie Marsh	8c018e8261	Add settings validation to lib.rs	2022-12-26 10:12:07 -05:00
Colin Delahunty	debd909b2c	Magic Trailing Commas in isort (#1363 )	2022-12-26 09:40:02 -05:00
Reiner Gerecke	fa54538bd1	Only re-associate inline comments during normalization when necessary (#1380 )	2022-12-26 07:52:13 -05:00
Reiner Gerecke	939f738a71	Update rust python to handle files with BOM (#1379 )	2022-12-26 07:03:13 -05:00
Charlie Marsh	b0f30bef8f	Add support for `ruff.toml` (#1378 )	2022-12-25 21:55:07 -05:00
Charlie Marsh	28c45eb2a3	Remove required versions from pyproject.toml	2022-12-25 20:21:01 -05:00
Charlie Marsh	4dc45912e8	Run cargo dev commands	2022-12-25 20:12:12 -05:00
Charlie Marsh	5ef8bff341	Bump version to 0.0.194	2022-12-25 19:54:45 -05:00
Charlie Marsh	2ab8f77223	Update command-line help text	2022-12-25 19:54:14 -05:00
Charlie Marsh	8b72f55a09	Add `--required-version` (#1376 )	2022-12-25 19:53:50 -05:00
Charlie Marsh	19121219fb	Avoid double-extending past the end when showing source (#1377 )	2022-12-25 19:52:42 -05:00
Charlie Marsh	d9355c989a	Add a `--fix-only` command-line and `pyproject.toml` option (#1375 )	2022-12-25 18:49:56 -05:00
Charlie Marsh	ec80d1cd85	Respect natural ordering for imports (#1374 )	2022-12-25 18:11:41 -05:00
Charlie Marsh	9bb470c7d4	Ignore unused arguments for @overload stubs (#1373 )	2022-12-25 17:22:31 -05:00
Harutaka Kawamura	dca3fcd8d1	Improve `excepthandler_name_range` (#1368 )	2022-12-25 00:12:12 -05:00
Harutaka Kawamura	10f75c9620	Fix F841 (`UnusedVariable`) range in except handler (#1367 )	2022-12-24 22:55:55 -05:00
				`@@ -0,0 +1 @@`
				`from long_module_name import member_one, member_two, member_three, member_four, member_five`
				`@@ -0,0 +1,2 @@`
				`from long_module_name import member_one, member_two, member_three, member_four, member_five`