Bump version to 0.0.200

Include docstrings for settings enum members (#1446 )
Update snapshots
2022-12-29 13:31:23 -05:00 · 2022-12-29 13:15:44 -05:00 · 2022-12-29 13:13:43 -05:00 · 2022-12-29 13:06:22 -05:00 · 2022-12-29 12:51:58 -05:00 · 2022-12-29 12:43:16 -05:00
564 changed files with 37494 additions and 6159 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:
@@ -20,6 +20,9 @@ jobs:
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
+          components: rustfmt
      - uses: actions/cache@v3
        env:
          cache-name: cache-cargo
@@ -33,8 +36,14 @@ jobs:
            ${{ runner.os }}-build-
            ${{ runner.os }}-
      - run: cargo build --all --release
+      - 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+      - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated.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+      - run: git diff --quiet src/checks_gen.rs || echo "::error file=src/checks_gen.rs::This file is outdated.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+      - run: git diff --quiet ruff.schema.json || echo "::error file=ruff.schema.json::This file is outdated.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run: git diff --quiet playground/src/ruff_options.ts || echo "::error file=playground/src/ruff_options.ts::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --exit-code -- README.md src/checks_gen.rs ruff.schema.json playground/src/ruff_options.ts

-  cargo_fmt:
+  cargo-fmt:
    name: "cargo fmt"
    runs-on: ubuntu-latest
    steps:
@@ -70,6 +79,7 @@ jobs:
          toolchain: nightly-2022-11-01
          override: true
          components: clippy
+          target: wasm32-unknown-unknown
      - uses: actions/cache@v3
        env:
          cache-name: cache-cargo
@@ -83,8 +93,9 @@ 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:
@@ -106,9 +117,41 @@ jobs:
            ${{ runner.os }}-build-${{ env.cache-name }}-
            ${{ runner.os }}-build-
            ${{ runner.os }}-
+      - run: pip install black[d]==22.12.0
      - run: cargo test --all
+      - 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:
@@ -120,7 +163,7 @@ jobs:
          override: true
      - uses: actions/setup-python@v4
        with:
-          python-version: "3.10"
+          python-version: "3.11"
      - run: pip install maturin
      - uses: actions/cache@v3
        env:
--- 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/.github/workflows/ruff.yaml
+++ b/.github/workflows/ruff.yaml
@@ -1,9 +1,8 @@
 name: "[ruff] Release"

 on:
-  create:
-    tags:
-      - v*
+  release:
+    types: [published]

 concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.165
+    rev: v0.0.200
    hooks:
      - id: ruff

--- a/BREAKING_CHANGES.md
+++ b/BREAKING_CHANGES.md
@@ -0,0 +1,23 @@
+# Breaking Changes
+
+## 0.0.181
+
+### Files excluded by `.gitignore` are now ignored ([#1234](https://github.com/charliermarsh/ruff/pull/1234))
+
+Ruff will now avoid checking files that are excluded by `.ignore`, `.gitignore`,
+`.git/info/exclude`, and global `gitignore` files. This behavior is powered by the [`ignore`](https://docs.rs/ignore/latest/ignore/struct.WalkBuilder.html#ignore-rules)
+crate, and is applied in addition to Ruff's built-in `exclude` system.
+
+To disable this behavior, set `respect-gitignore = false` in your `pyproject.toml` file.
+
+Note that hidden files (i.e., files and directories prefixed with a `.`) are _not_ ignored by
+default.
+
+## 0.0.178
+
+### Configuration files are now resolved hierarchically ([#1190](https://github.com/charliermarsh/ruff/pull/1190))
+
+`pyproject.toml` files are now resolved hierarchically, such that for each Python file, we find
+the first `pyproject.toml` file in its path, and use that to determine its lint settings.
+
+See the [README](https://github.com/charliermarsh/ruff#pyprojecttoml-discovery) for more.
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -48,8 +48,8 @@ prior to merging.
 There are four phases to adding a new lint rule:

 1. Define the rule in `src/checks.rs`.
-2. Define the _logic_ for triggering the rule in `src/check_ast.rs` (for AST-based checks),
-   `src/check_tokens.rs` (for token-based checks), or `src/check_lines.rs` (for text-based checks).
+2. Define the _logic_ for triggering the rule in `src/checkers/ast.rs` (for AST-based checks),
+   `src/checkers/tokens.rs` (for token-based checks), or `src/checkers/lines.rs` (for text-based checks).
 3. Add a test fixture.
 4. Update the generated files (documentation and generated code).

@@ -59,9 +59,9 @@ 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
@@ -79,9 +79,7 @@ Then, run `cargo test`. Your test will fail, but you'll be prompted to follow-up
 `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

@@ -105,6 +103,8 @@ 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`.

+Finally, regenerate the documentation and generated code with `cargo +nightly dev generate-all`.
+
 ## Release process

 As of now, Ruff has an ad hoc release process: releases are cut with high frequency via GitHub
--- 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",
@@ -644,6 +664,12 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"

+[[package]]
+name = "dyn-clone"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9b0705efd4599c15a38151f4721f7bc388306f61084d3bfd50bd07fbca5cb60"
+
 [[package]]
 name = "either"
 version = "1.8.0"
@@ -706,9 +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",
@@ -724,10 +750,10 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.165-dev.0"
+version = "0.0.200-dev.0"
 dependencies = [
 "anyhow",
- "clap 4.0.29",
+ "clap 4.0.32",
 "configparser",
 "once_cell",
 "regex",
@@ -735,6 +761,8 @@ dependencies = [
 "rustc-hash",
 "serde",
 "serde_json",
+ "strum",
+ "strum_macros",
 "toml",
 ]

@@ -796,6 +824,12 @@ dependencies = [
 "wasm-bindgen",
 ]

+[[package]]
+name = "glob"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
+
 [[package]]
 name = "globset"
 version = "0.4.9"
@@ -888,6 +922,24 @@ dependencies = [
 "unicode-normalization",
 ]

+[[package]]
+name = "ignore"
+version = "0.4.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "713f1b139373f96a2e0ce3ac931cd01ee973c3c5dd7c40c0c2efe96ad2b6751d"
+dependencies = [
+ "crossbeam-utils",
+ "globset",
+ "lazy_static",
+ "log",
+ "memchr",
+ "regex",
+ "same-file",
+ "thread_local",
+ "walkdir",
+ "winapi-util",
+]
+
 [[package]]
 name = "indexmap"
 version = "1.9.2"
@@ -920,9 +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",
@@ -953,9 +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",
@@ -974,9 +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"
@@ -1083,9 +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"
@@ -1113,9 +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",
 ]
@@ -1128,9 +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"
@@ -1202,6 +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"
@@ -1302,11 +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",
 ]

@@ -1353,9 +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"
@@ -1593,9 +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",
 ]
@@ -1625,9 +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",
 ]
@@ -1721,11 +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",
 ]
@@ -1821,7 +1878,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.165"
+version = "0.0.200"
 dependencies = [
 "annotate-snippets 0.9.1",
 "anyhow",
@@ -1830,22 +1887,29 @@ 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",
 "filetime",
 "getrandom 0.2.8",
+ "glob",
 "globset",
+ "ignore",
 "insta",
 "itertools",
+ "js-sys",
 "libcst",
 "log",
+ "natord",
 "nohash-hasher",
 "notify",
 "num-bigint",
@@ -1860,8 +1924,13 @@ dependencies = [
 "rustpython-ast",
 "rustpython-common",
 "rustpython-parser",
+ "schemars",
+ "semver",
 "serde",
+ "serde-wasm-bindgen",
 "serde_json",
+ "shellexpand",
+ "similar",
 "strum",
 "strum_macros",
 "test-case",
@@ -1869,15 +1938,18 @@ dependencies = [
 "titlecase",
 "toml",
 "update-informer",
+ "ureq",
 "walkdir",
+ "wasm-bindgen",
+ "wasm-bindgen-test",
 ]

 [[package]]
 name = "ruff_dev"
-version = "0.0.165"
+version = "0.0.200"
 dependencies = [
 "anyhow",
- "clap 4.0.29",
+ "clap 4.0.32",
 "codegen",
 "itertools",
 "libcst",
@@ -1886,13 +1958,16 @@ dependencies = [
 "rustpython-ast",
 "rustpython-common",
 "rustpython-parser",
+ "schemars",
+ "serde_json",
 "strum",
 "strum_macros",
+ "textwrap",
 ]

 [[package]]
 name = "ruff_macros"
-version = "0.0.161"
+version = "0.0.200"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1908,9 +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",
@@ -1935,7 +2010,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -1945,7 +2020,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -1968,7 +2043,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
 dependencies = [
 "bincode",
 "bitflags",
@@ -1985,7 +2060,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
 dependencies = [
 "ahash",
 "anyhow",
@@ -2009,15 +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"
@@ -2028,6 +2103,36 @@ dependencies = [
 "winapi-util",
 ]

+[[package]]
+name = "schemars"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a5fb6c61f29e723026dc8e923d94c694313212abbecbbe5f55a7748eec5b307"
+dependencies = [
+ "dyn-clone",
+ "schemars_derive",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "schemars_derive"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f188d036977451159430f3b8dc82ec76364a42b7e289c2b18a9a18f4470058e9"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "serde_derive_internals",
+ "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"
@@ -2036,9 +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"
@@ -2052,24 +2157,46 @@ 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",
+ "syn",
+]
+
+[[package]]
+name = "serde_derive_internals"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85bf8229e7920a9f636479437026331ce11aa132b4dde37d121944a44d6e5f3c"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2078,15 +2205,24 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "020ff22c755c2ed3f8cf162dbb41a7268d934702f3ed3631656ea597e08fc3db"
+checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
 dependencies = [
 "itoa",
 "ryu",
 "serde",
 ]

+[[package]]
+name = "shellexpand"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd1c7ddea665294d484c39fd0c0d2b7e35bbfe10035c5fe1854741a57f6880e1"
+dependencies = [
+ "dirs 4.0.0",
+]
+
 [[package]]
 name = "similar"
 version = "2.2.1"
@@ -2125,9 +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"
@@ -2172,9 +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",
@@ -2279,24 +2415,33 @@ 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",
 "syn",
 ]

+[[package]]
+name = "thread_local"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5516c27b78311c50bf42c071425c560ac799b11c30b31f87e3081965fe5e0180"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "time"
 version = "0.1.45"
@@ -2355,9 +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",
 ]
@@ -2444,9 +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"
@@ -2615,6 +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"
@@ -2644,6 +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"
@@ -2666,9 +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 = "0.0.165"
+version = "0.0.200"
+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"] }
@@ -20,55 +27,72 @@ 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" }
 fern = { version = "0.6.1" }
 filetime = { version = "0.2.17" }
+glob = { version = "0.3.0" }
 globset = { version = "0.4.9" }
+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 = "0.0.161", path = "ruff_macros" }
+ruff_macros = { version = "0.0.200", path = "ruff_macros" }
 rustc-hash = { version = "1.1.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "28f9f65ccc625f00835d84bbb5fba274dce5aa89" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "28f9f65ccc625f00835d84bbb5fba274dce5aa89" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "28f9f65ccc625f00835d84bbb5fba274dce5aa89" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
+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"]
@@ -86,6 +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/75
+++ b/75
@@ -388,6 +388,81 @@ are:
    SOFTWARE.
  """

+- flake8-import-conventions, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2021 João Palmeiro
+
+    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-unused-arguments, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2019 Nathan Hoad
+
+    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-simplify, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2020 Martin Thoma
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
 - isort, licensed as follows:
  """
    The MIT License (MIT)
--- a/README.md
+++ b/README.md
--- a/flake8_to_ruff/Cargo.lock
+++ b/flake8_to_ruff/Cargo.lock
@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.165"
+version = "0.0.200"
 dependencies = [
 "anyhow",
 "clap",
@@ -1975,7 +1975,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.165"
+version = "0.0.200"
 dependencies = [
 "anyhow",
 "bincode",
@@ -2028,7 +2028,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -2038,7 +2038,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -2061,7 +2061,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "bincode",
 "bitflags",
@@ -2078,7 +2078,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=28f9f65ccc625f00835d84bbb5fba274dce5aa89#28f9f65ccc625f00835d84bbb5fba274dce5aa89"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "ahash",
 "anyhow",
--- a/flake8_to_ruff/Cargo.toml
+++ b/flake8_to_ruff/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.165-dev.0"
+version = "0.0.200-dev.0"
 edition = "2021"

 [lib]
@@ -16,6 +16,8 @@ ruff = { path = "..", default-features = false }
 rustc-hash = { version = "1.1.0" }
 serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.87" }
+strum = { version = "0.24.1", features = ["strum_macros"] }
+strum_macros = { version = "0.24.3" }
 toml = { version = "0.5.9" }

 [dev-dependencies]
--- a/flake8_to_ruff/examples/cryptography/pyproject.toml
+++ b/flake8_to_ruff/examples/cryptography/pyproject.toml
@@ -0,0 +1,65 @@
+[build-system]
+requires = [
+    # The minimum setuptools version is specific to the PEP 517 backend,
+    # and may be stricter than the version required in `setup.cfg`
+    "setuptools>=40.6.0,!=60.9.0",
+    "wheel",
+    # Must be kept in sync with the `install_requirements` in `setup.cfg`
+    "cffi>=1.12; platform_python_implementation != 'PyPy'",
+    "setuptools-rust>=0.11.4",
+]
+build-backend = "setuptools.build_meta"
+
+[tool.black]
+line-length = 79
+target-version = ["py36"]
+
+[tool.pytest.ini_options]
+addopts = "-r s --capture=no --strict-markers --benchmark-disable"
+markers = [
+    "skip_fips: this test is not executed in FIPS mode",
+    "supported: parametrized test requiring only_if and skip_message",
+]
+
+[tool.mypy]
+show_error_codes = true
+check_untyped_defs = true
+no_implicit_reexport = true
+warn_redundant_casts = true
+warn_unused_ignores = true
+warn_unused_configs = true
+strict_equality = true
+
+[[tool.mypy.overrides]]
+module = [
+    "pretend"
+]
+ignore_missing_imports = true
+
+[tool.coverage.run]
+branch = true
+relative_files = true
+source = [
+    "cryptography",
+    "tests/",
+]
+
+[tool.coverage.paths]
+source = [
+   "src/cryptography",
+   "*.tox/*/lib*/python*/site-packages/cryptography",
+   "*.tox\\*\\Lib\\site-packages\\cryptography",
+   "*.tox/pypy/site-packages/cryptography",
+]
+tests =[
+   "tests/",
+   "*tests\\",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "@abc.abstractmethod",
+    "@abc.abstractproperty",
+    "@typing.overload",
+    "if typing.TYPE_CHECKING",
+]
--- a/flake8_to_ruff/examples/cryptography/setup.cfg
+++ b/flake8_to_ruff/examples/cryptography/setup.cfg
@@ -0,0 +1,91 @@
+[metadata]
+name = cryptography
+version = attr: cryptography.__version__
+description = cryptography is a package which provides cryptographic recipes and primitives to Python developers.
+long_description = file: README.rst
+long_description_content_type = text/x-rst
+license = BSD-3-Clause OR Apache-2.0
+url = https://github.com/pyca/cryptography
+author = The Python Cryptographic Authority and individual contributors
+author_email = cryptography-dev@python.org
+project_urls =
+    Documentation=https://cryptography.io/
+    Source=https://github.com/pyca/cryptography/
+    Issues=https://github.com/pyca/cryptography/issues
+    Changelog=https://cryptography.io/en/latest/changelog/
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Developers
+    License :: OSI Approved :: Apache Software License
+    License :: OSI Approved :: BSD License
+    Natural Language :: English
+    Operating System :: MacOS :: MacOS X
+    Operating System :: POSIX
+    Operating System :: POSIX :: BSD
+    Operating System :: POSIX :: Linux
+    Operating System :: Microsoft :: Windows
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
+    Topic :: Security :: Cryptography
+
+[options]
+python_requires = >=3.6
+include_package_data = True
+zip_safe = False
+package_dir =
+    =src
+packages = find:
+# `install_requires` must be kept in sync with `pyproject.toml`
+install_requires =
+    cffi >=1.12
+
+[options.packages.find]
+where = src
+exclude =
+    _cffi_src
+    _cffi_src.*
+
+[options.extras_require]
+test =
+    pytest>=6.2.0
+    pytest-benchmark
+    pytest-cov
+    pytest-subtests
+    pytest-xdist
+    pretend
+    iso8601
+    pytz
+    hypothesis>=1.11.4,!=3.79.2
+docs =
+    sphinx >= 1.6.5,!=1.8.0,!=3.1.0,!=3.1.1,!=5.2.0,!=5.2.0.post0
+    sphinx_rtd_theme
+docstest =
+    pyenchant >= 1.6.11
+    twine >= 1.12.0
+    sphinxcontrib-spelling >= 4.0.1
+sdist =
+    setuptools_rust >= 0.11.4
+pep8test =
+    black
+    flake8
+    flake8-import-order
+    pep8-naming
+# This extra is for OpenSSH private keys that use bcrypt KDF
+# Versions: v3.1.3 - ignore_few_rounds, v3.1.5 - abi3
+ssh =
+    bcrypt >= 3.1.5
+
+[flake8]
+ignore = E203,E211,W503,W504,N818
+exclude = .tox,*.egg,.git,_build,.hypothesis
+select = E,W,F,N,I
+application-import-names = cryptography,cryptography_vectors,tests
--- a/flake8_to_ruff/pyproject.toml
+++ b/flake8_to_ruff/pyproject.toml
@@ -12,6 +12,7 @@ classifiers = [
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3 :: Only",
    "Topic :: Software Development :: Libraries :: Python Modules",
    "Topic :: Software Development :: Quality Assurance",
--- a/flake8_to_ruff/src/black.rs
+++ b/flake8_to_ruff/src/black.rs
@@ -0,0 +1,32 @@
+//! Extract Black configuration settings from a pyproject.toml.
+
+use std::path::Path;
+
+use anyhow::Result;
+use ruff::settings::types::PythonVersion;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
+pub struct Black {
+    #[serde(alias = "line-length", alias = "line_length")]
+    pub line_length: Option<usize>,
+    #[serde(alias = "target-version", alias = "target_version")]
+    pub target_version: Option<Vec<PythonVersion>>,
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+struct Tools {
+    black: Option<Black>,
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+struct Pyproject {
+    tool: Option<Tools>,
+}
+
+pub fn parse_black_options<P: AsRef<Path>>(path: P) -> Result<Option<Black>> {
+    let contents = std::fs::read_to_string(path)?;
+    Ok(toml::from_str::<Pyproject>(&contents)?
+        .tool
+        .and_then(|tool| tool.black))
+}
--- a/flake8_to_ruff/src/converter.rs
+++ b/flake8_to_ruff/src/converter.rs
@@ -4,19 +4,28 @@ 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_quotes, flake8_tidy_imports, mccabe, pep8_naming,
+    flake8_annotations, flake8_bugbear, flake8_errmsg, flake8_quotes, flake8_tidy_imports, mccabe,
+    pep8_naming, pydocstyle,
 };

+use crate::black::Black;
 use crate::plugin::Plugin;
 use crate::{parser, plugin};

 pub fn convert(
-    flake8: &HashMap<String, Option<String>>,
+    config: &HashMap<String, HashMap<String, Option<String>>>,
+    black: Option<&Black>,
    plugins: Option<Vec<Plugin>>,
 ) -> Result<Pyproject> {
+    // Extract the Flake8 section.
+    let flake8 = config
+        .get("flake8")
+        .expect("Unable to find flake8 section in INI file");
+
    // Extract all referenced check code prefixes, to power plugin inference.
    let mut referenced_codes: BTreeSet<CheckCodePrefix> = BTreeSet::default();
    for (key, value) in flake8 {
@@ -53,10 +62,15 @@ pub fn convert(
            plugin::resolve_select(
                flake8,
                &plugins.unwrap_or_else(|| {
-                    plugin::infer_plugins_from_options(flake8)
-                        .into_iter()
-                        .chain(plugin::infer_plugins_from_codes(&referenced_codes))
-                        .collect()
+                    let from_options = plugin::infer_plugins_from_options(flake8);
+                    if !from_options.is_empty() {
+                        eprintln!("Inferred plugins from settings: {from_options:#?}");
+                    }
+                    let from_codes = plugin::infer_plugins_from_codes(&referenced_codes);
+                    if !from_codes.is_empty() {
+                        eprintln!("Inferred plugins from referenced check codes: {from_codes:#?}");
+                    }
+                    from_options.into_iter().chain(from_codes).collect()
                }),
            )
        });
@@ -73,10 +87,12 @@ pub fn convert(
    let mut options = Options::default();
    let mut flake8_annotations = flake8_annotations::settings::Options::default();
    let mut flake8_bugbear = flake8_bugbear::settings::Options::default();
+    let mut flake8_errmsg = flake8_errmsg::settings::Options::default();
    let mut flake8_quotes = flake8_quotes::settings::Options::default();
    let mut flake8_tidy_imports = flake8_tidy_imports::settings::Options::default();
    let mut mccabe = mccabe::settings::Options::default();
    let mut pep8_naming = pep8_naming::settings::Options::default();
+    let mut pydocstyle = pydocstyle::settings::Options::default();
    for (key, value) in flake8 {
        if let Some(value) = value {
            match key.as_str() {
@@ -186,14 +202,26 @@ 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),
                    Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
                },
+                // flake8-errmsg
+                "errmsg-max-string-length" | "errmsg_max_string_length" => {
+                    match value.clone().parse::<usize>() {
+                        Ok(max_string_length) => {
+                            flake8_errmsg.max_string_length = Some(max_string_length);
+                        }
+                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
+                    }
+                }
                // Unknown
                _ => eprintln!("Skipping unsupported property: {key}"),
            }
@@ -209,6 +237,9 @@ pub fn convert(
    if flake8_bugbear != flake8_bugbear::settings::Options::default() {
        options.flake8_bugbear = Some(flake8_bugbear);
    }
+    if flake8_errmsg != flake8_errmsg::settings::Options::default() {
+        options.flake8_errmsg = Some(flake8_errmsg);
+    }
    if flake8_quotes != flake8_quotes::settings::Options::default() {
        options.flake8_quotes = Some(flake8_quotes);
    }
@@ -221,6 +252,22 @@ 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 {
+        if let Some(line_length) = &black.line_length {
+            options.line_length = Some(*line_length);
+        }
+
+        if let Some(target_version) = &black.target_version {
+            if let Some(target_version) = target_version.iter().min() {
+                options.target_version = Some(*target_version);
+            }
+        }
+    }

    // Create the pyproject.toml.
    Ok(Pyproject::new(options))
@@ -232,31 +279,42 @@ 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;

    #[test]
    fn it_converts_empty() -> Result<()> {
-        let actual = convert(&HashMap::from([]), None)?;
+        let actual = convert(
+            &HashMap::from([("flake8".to_string(), HashMap::default())]),
+            None,
+            None,
+        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
                CheckCodePrefix::F,
@@ -266,13 +324,18 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -283,24 +346,34 @@ mod tests {
    #[test]
    fn it_converts_dashes() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: Some(100),
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
                CheckCodePrefix::F,
@@ -310,13 +383,18 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -327,24 +405,34 @@ mod tests {
    #[test]
    fn it_converts_underscores() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: Some(100),
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
                CheckCodePrefix::F,
@@ -354,13 +442,18 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -371,24 +464,34 @@ mod tests {
    #[test]
    fn it_ignores_parse_errors() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
                CheckCodePrefix::F,
@@ -398,13 +501,18 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -415,24 +523,34 @@ mod tests {
    #[test]
    fn it_converts_plugin_options() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
                CheckCodePrefix::F,
@@ -442,8 +560,10 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: Some(flake8_quotes::settings::Options {
                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
                multiline_quotes: None,
@@ -451,9 +571,12 @@ mod tests {
                avoid_escape: None,
            }),
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -465,26 +588,36 @@ mod tests {
    fn it_converts_docstring_conventions() -> Result<()> {
        let actual = convert(
            &HashMap::from([(
-                "docstring-convention".to_string(),
-                Some("numpy".to_string()),
+                "flake8".to_string(),
+                HashMap::from([(
+                    "docstring-convention".to_string(),
+                    Some("numpy".to_string()),
+                )]),
            )]),
+            None,
            Some(vec![Plugin::Flake8Docstrings]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::D100,
                CheckCodePrefix::D101,
@@ -507,6 +640,7 @@ mod tests {
                CheckCodePrefix::D214,
                CheckCodePrefix::D215,
                CheckCodePrefix::D300,
+                CheckCodePrefix::D301,
                CheckCodePrefix::D400,
                CheckCodePrefix::D403,
                CheckCodePrefix::D404,
@@ -529,13 +663,20 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: Some(pydocstyle::settings::Options {
+                convention: Some(Convention::Numpy),
+            }),
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -546,24 +687,34 @@ mod tests {
    #[test]
    fn it_infers_plugins_if_omitted() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            )]),
+            None,
            None,
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
+            extend: None,
            extend_exclude: None,
            extend_ignore: None,
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
+            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
                CheckCodePrefix::F,
@@ -574,8 +725,10 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
            flake8_quotes: Some(flake8_quotes::settings::Options {
                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
                multiline_quotes: None,
@@ -583,9 +736,12 @@ mod tests {
                avoid_escape: None,
            }),
            flake8_tidy_imports: None,
+            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
--- a/flake8_to_ruff/src/lib.rs
+++ b/flake8_to_ruff/src/lib.rs
@@ -11,6 +11,7 @@
    clippy::too_many_lines
 )]

+pub mod black;
 pub mod converter;
 mod parser;
 pub mod plugin;
--- a/flake8_to_ruff/src/main.rs
+++ b/flake8_to_ruff/src/main.rs
@@ -17,6 +17,7 @@ use std::path::PathBuf;
 use anyhow::Result;
 use clap::Parser;
 use configparser::ini::Ini;
+use flake8_to_ruff::black::parse_black_options;
 use flake8_to_ruff::converter;
 use flake8_to_ruff::plugin::Plugin;

@@ -26,10 +27,14 @@ use flake8_to_ruff::plugin::Plugin;
    long_about = None
 )]
 struct Cli {
-    /// Path to the Flake8 configuration file (e.g., 'setup.cfg', 'tox.ini', or
-    /// '.flake8').
+    /// Path to the Flake8 configuration file (e.g., `setup.cfg`, `tox.ini`, or
+    /// `.flake8`).
    #[arg(required = true)]
    file: PathBuf,
+    /// Optional path to a `pyproject.toml` file, used to ensure compatibility
+    /// with Black.
+    #[arg(long)]
+    pyproject: Option<PathBuf>,
    /// List of plugins to enable.
    #[arg(long, value_delimiter = ',')]
    plugin: Option<Vec<Plugin>>,
@@ -43,13 +48,15 @@ fn main() -> Result<()> {
    ini.set_multiline(true);
    let config = ini.load(cli.file).map_err(|msg| anyhow::anyhow!(msg))?;

-    // Extract the Flake8 section.
-    let flake8 = config
-        .get("flake8")
-        .expect("Unable to find flake8 section in INI file");
+    // Read the pyproject.toml file.
+    let black = cli
+        .pyproject
+        .map(parse_black_options)
+        .transpose()?
+        .flatten();

-    // Create the pyproject.toml.
-    let pyproject = converter::convert(flake8, cli.plugin)?;
+    // Create Ruff's pyproject.toml section.
+    let pyproject = converter::convert(&config, black.as_ref(), cli.plugin)?;
    println!("{}", toml::to_string_pretty(&pyproject)?);

    Ok(())
--- a/flake8_to_ruff/src/parser.rs
+++ b/flake8_to_ruff/src/parser.rs
@@ -3,6 +3,7 @@ use std::str::FromStr;
 use anyhow::{bail, Result};
 use once_cell::sync::Lazy;
 use regex::Regex;
+use ruff::checks::PREFIX_REDIRECTS;
 use ruff::checks_gen::CheckCodePrefix;
 use ruff::settings::types::PatternPrefixPair;
 use rustc_hash::FxHashMap;
@@ -18,7 +19,9 @@ pub fn parse_prefix_codes(value: &str) -> Vec<CheckCodePrefix> {
        if code.is_empty() {
            continue;
        }
-        if let Ok(code) = CheckCodePrefix::from_str(code) {
+        if let Some(code) = PREFIX_REDIRECTS.get(code) {
+            codes.push(code.clone());
+        } else if let Ok(code) = CheckCodePrefix::from_str(code) {
            codes.push(code);
        } else {
            eprintln!("Unsupported prefix code: {code}");
@@ -83,16 +86,22 @@ impl State {
    fn parse(&self) -> Vec<PatternPrefixPair> {
        let mut codes: Vec<PatternPrefixPair> = vec![];
        for code in &self.codes {
-            match CheckCodePrefix::from_str(code) {
-                Ok(code) => {
-                    for filename in &self.filenames {
-                        codes.push(PatternPrefixPair {
-                            pattern: filename.clone(),
-                            prefix: code.clone(),
-                        });
-                    }
+            if let Some(code) = PREFIX_REDIRECTS.get(code.as_str()) {
+                for filename in &self.filenames {
+                    codes.push(PatternPrefixPair {
+                        pattern: filename.clone(),
+                        prefix: code.clone(),
+                    });
                }
-                Err(_) => eprintln!("Skipping unrecognized prefix: {code}"),
+            } else if let Ok(code) = CheckCodePrefix::from_str(code) {
+                for filename in &self.filenames {
+                    codes.push(PatternPrefixPair {
+                        pattern: filename.clone(),
+                        prefix: code.clone(),
+                    });
+                }
+            } else {
+                eprintln!("Unsupported prefix code: {code}");
            }
        }
        codes
@@ -135,7 +144,6 @@ fn tokenize_files_to_codes_mapping(value: &str) -> Vec<Token> {
 }

 /// Parse a 'files-to-codes' mapping, mimicking Flake8's internal logic.
-///
 /// See: <https://github.com/PyCQA/flake8/blob/7dfe99616fc2f07c0017df2ba5fa884158f3ea8a/src/flake8/utils.py#L45>
 pub fn parse_files_to_codes_mapping(value: &str) -> Result<Vec<PatternPrefixPair>> {
    if value.trim().is_empty() {
--- a/flake8_to_ruff/src/plugin.rs
+++ b/flake8_to_ruff/src/plugin.rs
@@ -1,10 +1,11 @@
 use std::collections::{BTreeSet, HashMap};
+use std::fmt;
 use std::str::FromStr;

 use anyhow::anyhow;
 use ruff::checks_gen::CheckCodePrefix;

-#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
+#[derive(Clone, Ord, PartialOrd, Eq, PartialEq)]
 pub enum Plugin {
    Flake8Annotations,
    Flake8Bandit,
@@ -12,14 +13,18 @@ pub enum Plugin {
    Flake8Bugbear,
    Flake8Builtins,
    Flake8Comprehensions,
+    Flake8Datetimez,
    Flake8Debugger,
    Flake8Docstrings,
+    Flake8ErrMsg,
    Flake8Eradicate,
    Flake8Print,
    Flake8Quotes,
    Flake8Return,
+    Flake8Simplify,
    Flake8TidyImports,
    McCabe,
+    PandasVet,
    PEP8Naming,
    Pyupgrade,
 }
@@ -35,14 +40,18 @@ impl FromStr for Plugin {
            "flake8-bugbear" => Ok(Plugin::Flake8Bugbear),
            "flake8-builtins" => Ok(Plugin::Flake8Builtins),
            "flake8-comprehensions" => Ok(Plugin::Flake8Comprehensions),
+            "flake8-datetimez" => Ok(Plugin::Flake8Datetimez),
            "flake8-debugger" => Ok(Plugin::Flake8Debugger),
            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
-            "flake8-eradicate" => Ok(Plugin::Flake8BlindExcept),
+            "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
+            "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
            "flake8-print" => Ok(Plugin::Flake8Print),
            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
            "flake8-return" => Ok(Plugin::Flake8Return),
+            "flake8-simplify" => Ok(Plugin::Flake8Simplify),
            "flake8-tidy-imports" => Ok(Plugin::Flake8TidyImports),
            "mccabe" => Ok(Plugin::McCabe),
+            "pandas-vet" => Ok(Plugin::PandasVet),
            "pep8-naming" => Ok(Plugin::PEP8Naming),
            "pyupgrade" => Ok(Plugin::Pyupgrade),
            _ => Err(anyhow!("Unknown plugin: {string}")),
@@ -50,25 +59,62 @@ impl FromStr for Plugin {
    }
 }

+impl fmt::Debug for Plugin {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Plugin::Flake8Annotations => "flake8-annotations",
+                Plugin::Flake8Bandit => "flake8-bandit",
+                Plugin::Flake8BlindExcept => "flake8-blind-except",
+                Plugin::Flake8Bugbear => "flake8-bugbear",
+                Plugin::Flake8Builtins => "flake8-builtins",
+                Plugin::Flake8Comprehensions => "flake8-comprehensions",
+                Plugin::Flake8Datetimez => "flake8-datetimez",
+                Plugin::Flake8Debugger => "flake8-debugger",
+                Plugin::Flake8Docstrings => "flake8-docstrings",
+                Plugin::Flake8Eradicate => "flake8-eradicate",
+                Plugin::Flake8ErrMsg => "flake8-errmsg",
+                Plugin::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::Pyupgrade => "pyupgrade",
+            }
+        )
+    }
+}
+
 impl Plugin {
    pub fn default(&self) -> CheckCodePrefix {
        match self {
            Plugin::Flake8Annotations => CheckCodePrefix::ANN,
            Plugin::Flake8Bandit => CheckCodePrefix::S,
+            // TODO(charlie): Handle rename of `B` to `BLE`.
            Plugin::Flake8BlindExcept => CheckCodePrefix::BLE,
            Plugin::Flake8Bugbear => CheckCodePrefix::B,
            Plugin::Flake8Builtins => CheckCodePrefix::A,
            Plugin::Flake8Comprehensions => CheckCodePrefix::C4,
+            Plugin::Flake8Datetimez => CheckCodePrefix::DTZ,
            Plugin::Flake8Debugger => CheckCodePrefix::T1,
            Plugin::Flake8Docstrings => CheckCodePrefix::D,
+            // TODO(charlie): Handle rename of `E` to `ERA`.
            Plugin::Flake8Eradicate => CheckCodePrefix::ERA,
+            Plugin::Flake8ErrMsg => CheckCodePrefix::EM,
            Plugin::Flake8Print => CheckCodePrefix::T2,
            Plugin::Flake8Quotes => CheckCodePrefix::Q,
            Plugin::Flake8Return => CheckCodePrefix::RET,
-            Plugin::Flake8TidyImports => CheckCodePrefix::I25,
+            Plugin::Flake8Simplify => CheckCodePrefix::SIM,
+            Plugin::Flake8TidyImports => CheckCodePrefix::TID25,
            Plugin::McCabe => CheckCodePrefix::C9,
+            Plugin::PandasVet => CheckCodePrefix::PD,
            Plugin::PEP8Naming => CheckCodePrefix::N,
-            Plugin::Pyupgrade => CheckCodePrefix::U,
+            Plugin::Pyupgrade => CheckCodePrefix::UP,
        }
    }

@@ -80,6 +126,7 @@ impl Plugin {
            Plugin::Flake8Bugbear => vec![CheckCodePrefix::B],
            Plugin::Flake8Builtins => vec![CheckCodePrefix::A],
            Plugin::Flake8Comprehensions => vec![CheckCodePrefix::C4],
+            Plugin::Flake8Datetimez => vec![CheckCodePrefix::DTZ],
            Plugin::Flake8Debugger => vec![CheckCodePrefix::T1],
            Plugin::Flake8Docstrings => {
                // Use the user-provided docstring.
@@ -98,13 +145,16 @@ impl Plugin {
                DocstringConvention::PEP8.select()
            }
            Plugin::Flake8Eradicate => vec![CheckCodePrefix::ERA],
+            Plugin::Flake8ErrMsg => vec![CheckCodePrefix::EM],
            Plugin::Flake8Print => vec![CheckCodePrefix::T2],
            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
            Plugin::Flake8Return => vec![CheckCodePrefix::RET],
-            Plugin::Flake8TidyImports => vec![CheckCodePrefix::I25],
+            Plugin::Flake8Simplify => vec![CheckCodePrefix::SIM],
+            Plugin::Flake8TidyImports => vec![CheckCodePrefix::TID],
            Plugin::McCabe => vec![CheckCodePrefix::C9],
+            Plugin::PandasVet => vec![CheckCodePrefix::PD],
            Plugin::PEP8Naming => vec![CheckCodePrefix::N],
-            Plugin::Pyupgrade => vec![CheckCodePrefix::U],
+            Plugin::Pyupgrade => vec![CheckCodePrefix::UP],
        }
    }
 }
@@ -162,6 +212,7 @@ impl DocstringConvention {
                // CheckCodePrefix::D214,
                // CheckCodePrefix::D215,
                CheckCodePrefix::D300,
+                CheckCodePrefix::D301,
                CheckCodePrefix::D400,
                CheckCodePrefix::D402,
                CheckCodePrefix::D403,
@@ -209,6 +260,7 @@ impl DocstringConvention {
                CheckCodePrefix::D214,
                CheckCodePrefix::D215,
                CheckCodePrefix::D300,
+                CheckCodePrefix::D301,
                CheckCodePrefix::D400,
                // CheckCodePrefix::D402,
                CheckCodePrefix::D403,
@@ -257,6 +309,7 @@ impl DocstringConvention {
                CheckCodePrefix::D214,
                // CheckCodePrefix::D215,
                CheckCodePrefix::D300,
+                CheckCodePrefix::D301,
                // CheckCodePrefix::D400,
                CheckCodePrefix::D402,
                CheckCodePrefix::D403,
@@ -370,6 +423,9 @@ pub fn infer_plugins_from_options(flake8: &HashMap<String, Option<String>>) -> V
            "staticmethod-decorators" | "staticmethod_decorators" => {
                plugins.insert(Plugin::PEP8Naming);
            }
+            "max-string-length" | "max_string_length" => {
+                plugins.insert(Plugin::Flake8ErrMsg);
+            }
            _ => {}
        }
    }
@@ -388,15 +444,18 @@ pub fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin
        Plugin::Flake8Bugbear,
        Plugin::Flake8Builtins,
        Plugin::Flake8Comprehensions,
+        Plugin::Flake8Datetimez,
        Plugin::Flake8Debugger,
        Plugin::Flake8Docstrings,
        Plugin::Flake8Eradicate,
+        Plugin::Flake8ErrMsg,
        Plugin::Flake8Print,
        Plugin::Flake8Quotes,
        Plugin::Flake8Return,
+        Plugin::Flake8Simplify,
        Plugin::Flake8TidyImports,
+        Plugin::PandasVet,
        Plugin::PEP8Naming,
-        Plugin::Pyupgrade,
    ]
    .into_iter()
    .filter(|plugin| {
--- 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/.prettierignore
+++ b/playground/.prettierignore
@@ -0,0 +1 @@
+src/ruff_options.ts
--- 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 +1,22 @@
+<!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>
+    <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 +1,137 @@
+import { useCallback, useEffect, useState } from "react";
+import { persist, restore } from "./config";
+import { DEFAULT_CONFIG_SOURCE, DEFAULT_PYTHON_SOURCE } from "../constants";
+import { ErrorMessage } from "./ErrorMessage";
+import Header from "./Header";
+import init, { check, current_version, Check } from "../pkg";
+import SettingsEditor from "./SettingsEditor";
+import SourceEditor from "./SourceEditor";
+import Themes from "./Themes";
+
+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 [configSource, setConfigSource] = useState<string | null>(null);
+  const [pythonSource, setPythonSource] = useState<string | null>(null);
+  const [checks, setChecks] = useState<Check[]>([]);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    init().then(() => setInitialized(true));
+  }, []);
+
+  useEffect(() => {
+    if (!initialized || configSource == null || pythonSource == null) {
+      return;
+    }
+
+    let config: any;
+    let checks: Check[];
+
+    try {
+      config = JSON.parse(configSource);
+    } 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, configSource, pythonSource]);
+
+  useEffect(() => {
+    if (configSource == null || pythonSource == null) {
+      const payload = restore();
+      if (payload) {
+        const [configSource, pythonSource] = payload;
+        setConfigSource(configSource);
+        setPythonSource(pythonSource);
+      } else {
+        setConfigSource(DEFAULT_CONFIG_SOURCE);
+        setPythonSource(DEFAULT_PYTHON_SOURCE);
+      }
+    }
+  }, [configSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    setVersion(current_version());
+  }, [initialized]);
+
+  const handleShare = useCallback(() => {
+    if (!initialized || configSource == null || pythonSource == null) {
+      return;
+    }
+
+    persist(configSource, pythonSource);
+  }, [initialized, configSource, pythonSource]);
+
+  const handlePythonSourceChange = useCallback((pythonSource: string) => {
+    setEdit((edit) => edit + 1);
+    setPythonSource(pythonSource);
+  }, []);
+
+  const handleConfigSourceChange = useCallback((configSource: string) => {
+    setEdit((edit) => edit + 1);
+    setConfigSource(configSource);
+  }, []);
+
+  return (
+    <main className={"h-full w-full flex flex-auto"}>
+      <Header
+        edit={edit}
+        version={version}
+        tab={tab}
+        onChange={setTab}
+        onShare={initialized ? handleShare : undefined}
+      />
+
+      <Themes />
+
+      <div className={"mt-12 relative flex-auto"}>
+        {initialized && configSource != null && pythonSource != null ? (
+          <>
+            <SourceEditor
+              visible={tab === "Source"}
+              source={pythonSource}
+              checks={checks}
+              onChange={handlePythonSourceChange}
+            />
+            <SettingsEditor
+              visible={tab === "Settings"}
+              source={configSource}
+              onChange={handleConfigSourceChange}
+            />
+          </>
+        ) : 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 +1,73 @@
+import classNames from "classnames";
+import ShareButton from "./ShareButton";
+import VersionTag from "./VersionTag";
+
+export type Tab = "Source" | "Settings";
+
+export default function Header({
+  edit,
+  version,
+  tab,
+  onChange,
+  onShare,
+}: {
+  edit: number;
+  version: string | null;
+  tab: Tab;
+  onChange: (tab: Tab) => void;
+  onShare?: () => void;
+}) {
+  return (
+    <div
+      className="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"
+      style={{ background: "#f8f9fa" }}
+    >
+      <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"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white"
+          )}
+          onClick={() => onChange("Source")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu 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"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white"
+          )}
+          onClick={() => onChange("Settings")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu 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>
+    </div>
+  );
+}
--- a/playground/src/Editor/SettingsEditor.tsx
+++ b/playground/src/Editor/SettingsEditor.tsx
@@ -0,0 +1,54 @@
+/**
+ * Editor for the settings JSON.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { useCallback, useEffect } from "react";
+import schema from "../../../ruff.schema.json";
+
+export default function SettingsEditor({
+  visible,
+  source,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  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={"Ayu-Light"}
+      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 shadow-copied dark:bg-ayu/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/80 bg-ayu 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 +1,114 @@
+/**
+ * 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";
+
+export type Mode = "JSON" | "Python";
+
+export default function SourceEditor({
+  visible,
+  source,
+  checks,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  checks: Check[];
+  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: `Fix ${check.code}`,
+              id: `fix-${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,
+      }}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      theme={"Ayu-Light"}
+      language={"python"}
+      value={source}
+      onChange={handleChange}
+    />
+  );
+}
--- a/playground/src/Editor/Themes.tsx
+++ b/playground/src/Editor/Themes.tsx
@@ -0,0 +1,645 @@
+import { useMonaco } from "@monaco-editor/react";
+import { useEffect } from "react";
+
+export default function Themes() {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    // Generated via `monaco-vscode-textmate-theme-converter`.
+    // See: https://github.com/ayu-theme/vscode-ayu/blob/91839e8a9dfa78d61e58dbcf9b52272a01fee66a/ayu-light.json.
+    monaco?.editor.defineTheme("Ayu-Light", {
+      inherit: false,
+      base: "vs-dark",
+      colors: {
+        focusBorder: "#ffaa33b3",
+        foreground: "#8a9199",
+        "widget.shadow": "#00000026",
+        "selection.background": "#035bd626",
+        "icon.foreground": "#8a9199",
+        errorForeground: "#e65050",
+        descriptionForeground: "#8a9199",
+        "textBlockQuote.background": "#f3f4f5",
+        "textLink.foreground": "#ffaa33",
+        "textLink.activeForeground": "#ffaa33",
+        "textPreformat.foreground": "#5c6166",
+        "button.background": "#ffaa33",
+        "button.foreground": "#f8f9fa",
+        "button.hoverBackground": "#f9a52e",
+        "button.secondaryBackground": "#8a919933",
+        "button.secondaryForeground": "#5c6166",
+        "button.secondaryHoverBackground": "#8a919980",
+        "dropdown.background": "#fcfcfc",
+        "dropdown.foreground": "#8a9199",
+        "dropdown.border": "#8a919945",
+        "input.background": "#fcfcfc",
+        "input.border": "#8a919945",
+        "input.foreground": "#5c6166",
+        "input.placeholderForeground": "#8a919980",
+        "inputOption.activeBorder": "#f4a0284d",
+        "inputOption.activeBackground": "#ffaa3333",
+        "inputOption.activeForeground": "#f4a028",
+        "inputValidation.errorBackground": "#fcfcfc",
+        "inputValidation.errorBorder": "#e65050",
+        "inputValidation.infoBackground": "#f8f9fa",
+        "inputValidation.infoBorder": "#55b4d4",
+        "inputValidation.warningBackground": "#f8f9fa",
+        "inputValidation.warningBorder": "#f2ae49",
+        "scrollbar.shadow": "#6b7d8f00",
+        "scrollbarSlider.background": "#8a919966",
+        "scrollbarSlider.hoverBackground": "#8a919999",
+        "scrollbarSlider.activeBackground": "#8a9199b3",
+        "badge.background": "#ffaa3333",
+        "badge.foreground": "#f4a028",
+        "progressBar.background": "#ffaa33",
+        "list.activeSelectionBackground": "#56728f1f",
+        "list.activeSelectionForeground": "#5c6166",
+        "list.focusBackground": "#56728f1f",
+        "list.focusForeground": "#5c6166",
+        "list.focusOutline": "#56728f1f",
+        "list.highlightForeground": "#ffaa33",
+        "list.deemphasizedForeground": "#e65050",
+        "list.hoverBackground": "#56728f1f",
+        "list.inactiveSelectionBackground": "#6b7d8f1f",
+        "list.inactiveSelectionForeground": "#8a9199",
+        "list.invalidItemForeground": "#8a91994d",
+        "list.errorForeground": "#e65050",
+        "tree.indentGuidesStroke": "#8a919959",
+        "listFilterWidget.background": "#f3f4f5",
+        "listFilterWidget.outline": "#ffaa33",
+        "listFilterWidget.noMatchesOutline": "#e65050",
+        "list.filterMatchBackground": "#8f30efcc",
+        "list.filterMatchBorder": "#9f40ffcc",
+        "activityBar.background": "#f8f9fa",
+        "activityBar.foreground": "#8a9199cc",
+        "activityBar.inactiveForeground": "#8a919999",
+        "activityBar.border": "#f8f9fa",
+        "activityBar.activeBorder": "#ffaa33b3",
+        "activityBarBadge.background": "#ffaa33",
+        "activityBarBadge.foreground": "#f8f9fa",
+        "sideBar.background": "#f8f9fa",
+        "sideBar.border": "#f8f9fa",
+        "sideBarTitle.foreground": "#8a9199",
+        "sideBarSectionHeader.background": "#f8f9fa",
+        "sideBarSectionHeader.foreground": "#8a9199",
+        "sideBarSectionHeader.border": "#f8f9fa",
+        "minimap.background": "#f8f9fa",
+        "minimap.selectionHighlight": "#035bd626",
+        "minimap.errorHighlight": "#e65050",
+        "minimap.findMatchHighlight": "#9f40ff2b",
+        "minimapGutter.addedBackground": "#6cbf43",
+        "minimapGutter.modifiedBackground": "#478acc",
+        "minimapGutter.deletedBackground": "#ff7383",
+        "editorGroup.border": "#6b7d8f1f",
+        "editorGroup.background": "#f3f4f5",
+        "editorGroupHeader.noTabsBackground": "#f8f9fa",
+        "editorGroupHeader.tabsBackground": "#f8f9fa",
+        "editorGroupHeader.tabsBorder": "#f8f9fa",
+        "tab.activeBackground": "#f8f9fa",
+        "tab.activeForeground": "#5c6166",
+        "tab.border": "#f8f9fa",
+        "tab.activeBorder": "#ffaa33",
+        "tab.unfocusedActiveBorder": "#8a9199",
+        "tab.inactiveBackground": "#f8f9fa",
+        "tab.inactiveForeground": "#8a9199",
+        "tab.unfocusedActiveForeground": "#8a9199",
+        "tab.unfocusedInactiveForeground": "#8a9199",
+        "editor.background": "#f8f9fa",
+        "editor.foreground": "#5c6166",
+        "editorLineNumber.foreground": "#8a919966",
+        "editorLineNumber.activeForeground": "#8a9199cc",
+        "editorCursor.foreground": "#ffaa33",
+        "editor.inactiveSelectionBackground": "#035bd612",
+        "editor.selectionBackground": "#035bd626",
+        "editor.selectionHighlightBackground": "#6cbf4326",
+        "editor.selectionHighlightBorder": "#6cbf4300",
+        "editor.wordHighlightBackground": "#478acc14",
+        "editor.wordHighlightStrongBackground": "#6cbf4314",
+        "editor.wordHighlightBorder": "#478acc80",
+        "editor.wordHighlightStrongBorder": "#6cbf4380",
+        "editor.findMatchBackground": "#9f40ff2b",
+        "editor.findMatchBorder": "#9f40ff2b",
+        "editor.findMatchHighlightBackground": "#9f40ffcc",
+        "editor.findMatchHighlightBorder": "#8f30efcc",
+        "editor.findRangeHighlightBackground": "#9f40ff40",
+        "editor.rangeHighlightBackground": "#9f40ff33",
+        "editor.lineHighlightBackground": "#8a91991a",
+        "editorLink.activeForeground": "#ffaa33",
+        "editorWhitespace.foreground": "#8a919966",
+        "editorIndentGuide.background": "#8a91992e",
+        "editorIndentGuide.activeBackground": "#8a919959",
+        "editorRuler.foreground": "#8a91992e",
+        "editorCodeLens.foreground": "#787b8099",
+        "editorBracketMatch.background": "#8a91994d",
+        "editorBracketMatch.border": "#8a91994d",
+        "editor.snippetTabstopHighlightBackground": "#6cbf4333",
+        "editorOverviewRuler.border": "#6b7d8f1f",
+        "editorOverviewRuler.modifiedForeground": "#478acc",
+        "editorOverviewRuler.addedForeground": "#6cbf43",
+        "editorOverviewRuler.deletedForeground": "#ff7383",
+        "editorOverviewRuler.errorForeground": "#e65050",
+        "editorOverviewRuler.warningForeground": "#ffaa33",
+        "editorOverviewRuler.bracketMatchForeground": "#8a9199b3",
+        "editorOverviewRuler.wordHighlightForeground": "#478acc66",
+        "editorOverviewRuler.wordHighlightStrongForeground": "#6cbf4366",
+        "editorOverviewRuler.findMatchForeground": "#9f40ff2b",
+        "editorError.foreground": "#e65050",
+        "editorWarning.foreground": "#ffaa33",
+        "editorGutter.modifiedBackground": "#478acccc",
+        "editorGutter.addedBackground": "#6cbf43cc",
+        "editorGutter.deletedBackground": "#ff7383cc",
+        "diffEditor.insertedTextBackground": "#6cbf431f",
+        "diffEditor.removedTextBackground": "#ff73831f",
+        "diffEditor.diagonalFill": "#6b7d8f1f",
+        "editorWidget.background": "#f3f4f5",
+        "editorWidget.border": "#6b7d8f1f",
+        "editorHoverWidget.background": "#f3f4f5",
+        "editorHoverWidget.border": "#6b7d8f1f",
+        "editorSuggestWidget.background": "#f3f4f5",
+        "editorSuggestWidget.border": "#6b7d8f1f",
+        "editorSuggestWidget.highlightForeground": "#ffaa33",
+        "editorSuggestWidget.selectedBackground": "#56728f1f",
+        "debugExceptionWidget.border": "#6b7d8f1f",
+        "debugExceptionWidget.background": "#f3f4f5",
+        "editorMarkerNavigation.background": "#f3f4f5",
+        "peekView.border": "#56728f1f",
+        "peekViewTitle.background": "#56728f1f",
+        "peekViewTitleDescription.foreground": "#8a9199",
+        "peekViewTitleLabel.foreground": "#5c6166",
+        "peekViewEditor.background": "#f3f4f5",
+        "peekViewEditor.matchHighlightBackground": "#9f40ffcc",
+        "peekViewEditor.matchHighlightBorder": "#8f30efcc",
+        "peekViewResult.background": "#f3f4f5",
+        "peekViewResult.fileForeground": "#5c6166",
+        "peekViewResult.lineForeground": "#8a9199",
+        "peekViewResult.matchHighlightBackground": "#9f40ffcc",
+        "peekViewResult.selectionBackground": "#56728f1f",
+        "panel.background": "#f8f9fa",
+        "panel.border": "#6b7d8f1f",
+        "panelTitle.activeBorder": "#ffaa33",
+        "panelTitle.activeForeground": "#5c6166",
+        "panelTitle.inactiveForeground": "#8a9199",
+        "statusBar.background": "#f8f9fa",
+        "statusBar.foreground": "#8a9199",
+        "statusBar.border": "#f8f9fa",
+        "statusBar.debuggingBackground": "#ed9366",
+        "statusBar.debuggingForeground": "#fcfcfc",
+        "statusBar.noFolderBackground": "#f3f4f5",
+        "statusBarItem.activeBackground": "#8a919933",
+        "statusBarItem.hoverBackground": "#8a919933",
+        "statusBarItem.prominentBackground": "#6b7d8f1f",
+        "statusBarItem.prominentHoverBackground": "#00000030",
+        "statusBarItem.remoteBackground": "#ffaa33",
+        "statusBarItem.remoteForeground": "#fcfcfc",
+        "titleBar.activeBackground": "#f8f9fa",
+        "titleBar.activeForeground": "#5c6166",
+        "titleBar.inactiveBackground": "#f8f9fa",
+        "titleBar.inactiveForeground": "#8a9199",
+        "titleBar.border": "#f8f9fa",
+        "extensionButton.prominentForeground": "#fcfcfc",
+        "extensionButton.prominentBackground": "#ffaa33",
+        "extensionButton.prominentHoverBackground": "#f9a52e",
+        "pickerGroup.border": "#6b7d8f1f",
+        "pickerGroup.foreground": "#8a919980",
+        "debugToolBar.background": "#f3f4f5",
+        "debugIcon.breakpointForeground": "#ed9366",
+        "debugIcon.breakpointDisabledForeground": "#ed936680",
+        "debugConsoleInputIcon.foreground": "#ffaa33",
+        "welcomePage.tileBackground": "#f8f9fa",
+        "welcomePage.tileShadow": "#00000026",
+        "welcomePage.progress.background": "#8a91991a",
+        "welcomePage.buttonBackground": "#ffaa3366",
+        "walkThrough.embeddedEditorBackground": "#f3f4f5",
+        "gitDecoration.modifiedResourceForeground": "#478accb3",
+        "gitDecoration.deletedResourceForeground": "#ff7383b3",
+        "gitDecoration.untrackedResourceForeground": "#6cbf43b3",
+        "gitDecoration.ignoredResourceForeground": "#8a919980",
+        "gitDecoration.conflictingResourceForeground": "",
+        "gitDecoration.submoduleResourceForeground": "#a37accb3",
+        "settings.headerForeground": "#5c6166",
+        "settings.modifiedItemIndicator": "#478acc",
+        "keybindingLabel.background": "#8a91991a",
+        "keybindingLabel.foreground": "#5c6166",
+        "keybindingLabel.border": "#5c61661a",
+        "keybindingLabel.bottomBorder": "#5c61661a",
+        "terminal.background": "#f8f9fa",
+        "terminal.foreground": "#5c6166",
+        "terminal.ansiBlack": "#000000",
+        "terminal.ansiRed": "#ea6c6d",
+        "terminal.ansiGreen": "#6cbf43",
+        "terminal.ansiYellow": "#eca944",
+        "terminal.ansiBlue": "#3199e1",
+        "terminal.ansiMagenta": "#9e75c7",
+        "terminal.ansiCyan": "#46ba94",
+        "terminal.ansiWhite": "#c7c7c7",
+        "terminal.ansiBrightBlack": "#686868",
+        "terminal.ansiBrightRed": "#f07171",
+        "terminal.ansiBrightGreen": "#86b300",
+        "terminal.ansiBrightYellow": "#f2ae49",
+        "terminal.ansiBrightBlue": "#399ee6",
+        "terminal.ansiBrightMagenta": "#a37acc",
+        "terminal.ansiBrightCyan": "#4cbf99",
+        "terminal.ansiBrightWhite": "#d1d1d1",
+      },
+      rules: [
+        {
+          fontStyle: "italic",
+          foreground: "#787b8099",
+          token: "comment",
+        },
+        {
+          foreground: "#86b300",
+          token: "string",
+        },
+        {
+          foreground: "#86b300",
+          token: "constant.other.symbol",
+        },
+        {
+          foreground: "#4cbf99",
+          token: "string.regexp",
+        },
+        {
+          foreground: "#4cbf99",
+          token: "constant.character",
+        },
+        {
+          foreground: "#4cbf99",
+          token: "constant.other",
+        },
+        {
+          foreground: "#a37acc",
+          token: "constant.numeric",
+        },
+        {
+          foreground: "#a37acc",
+          token: "constant.language",
+        },
+        {
+          foreground: "#5c6166",
+          token: "variable",
+        },
+        {
+          foreground: "#5c6166",
+          token: "variable.parameter.function-call",
+        },
+        {
+          foreground: "#f07171",
+          token: "variable.member",
+        },
+        {
+          fontStyle: "italic",
+          foreground: "#55b4d4",
+          token: "variable.language",
+        },
+        {
+          foreground: "#fa8d3e",
+          token: "storage",
+        },
+        {
+          foreground: "#fa8d3e",
+          token: "keyword",
+        },
+        {
+          foreground: "#ed9366",
+          token: "keyword.operator",
+        },
+        {
+          foreground: "#5c6166b3",
+          token: "punctuation.separator",
+        },
+        {
+          foreground: "#5c6166b3",
+          token: "punctuation.terminator",
+        },
+        {
+          foreground: "#5c6166",
+          token: "punctuation.section",
+        },
+        {
+          foreground: "#ed9366",
+          token: "punctuation.accessor",
+        },
+        {
+          foreground: "#fa8d3e",
+          token: "punctuation.definition.template-expression",
+        },
+        {
+          foreground: "#fa8d3e",
+          token: "punctuation.section.embedded",
+        },
+        {
+          foreground: "#5c6166",
+          token: "meta.embedded",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.java storage.type",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.haskell storage.type",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.c storage.type",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "entity.other.inherited-class",
+        },
+        {
+          foreground: "#fa8d3e",
+          token: "storage.type.function",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "source.java storage.type.primitive",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "entity.name.function",
+        },
+        {
+          foreground: "#a37acc",
+          token: "variable.parameter",
+        },
+        {
+          foreground: "#a37acc",
+          token: "meta.parameter",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "variable.function",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "variable.annotation",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "meta.function-call.generic",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "support.function.go",
+        },
+        {
+          foreground: "#f07171",
+          token: "support.function",
+        },
+        {
+          foreground: "#f07171",
+          token: "support.macro",
+        },
+        {
+          foreground: "#86b300",
+          token: "entity.name.import",
+        },
+        {
+          foreground: "#86b300",
+          token: "entity.name.package",
+        },
+        {
+          foreground: "#399ee6",
+          token: "entity.name",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "entity.name.tag",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "meta.tag.sgml",
+        },
+        {
+          foreground: "#399ee6",
+          token: "support.class.component",
+        },
+        {
+          foreground: "#55b4d480",
+          token: "punctuation.definition.tag.end",
+        },
+        {
+          foreground: "#55b4d480",
+          token: "punctuation.definition.tag.begin",
+        },
+        {
+          foreground: "#55b4d480",
+          token: "punctuation.definition.tag",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "entity.other.attribute-name",
+        },
+        {
+          fontStyle: "italic",
+          foreground: "#ed9366",
+          token: "support.constant",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "support.type",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "support.class",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "source.go storage.type",
+        },
+        {
+          foreground: "#e6ba7e",
+          token: "meta.decorator variable.other",
+        },
+        {
+          foreground: "#e6ba7e",
+          token: "meta.decorator punctuation.decorator",
+        },
+        {
+          foreground: "#e6ba7e",
+          token: "storage.type.annotation",
+        },
+        {
+          foreground: "#e65050",
+          token: "invalid",
+        },
+        {
+          foreground: "#c594c5",
+          token: "meta.diff",
+        },
+        {
+          foreground: "#c594c5",
+          token: "meta.diff.header",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "source.ruby variable.other.readwrite",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.css entity.name.tag",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.sass entity.name.tag",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.scss entity.name.tag",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.less entity.name.tag",
+        },
+        {
+          foreground: "#399ee6",
+          token: "source.stylus entity.name.tag",
+        },
+        {
+          foreground: "#787b8099",
+          token: "source.css support.type",
+        },
+        {
+          foreground: "#787b8099",
+          token: "source.sass support.type",
+        },
+        {
+          foreground: "#787b8099",
+          token: "source.scss support.type",
+        },
+        {
+          foreground: "#787b8099",
+          token: "source.less support.type",
+        },
+        {
+          foreground: "#787b8099",
+          token: "source.stylus support.type",
+        },
+        {
+          fontStyle: "normal",
+          foreground: "#55b4d4",
+          token: "support.type.property-name",
+        },
+        {
+          foreground: "#787b8099",
+          token: "constant.numeric.line-number.find-in-files - match",
+        },
+        {
+          foreground: "#fa8d3e",
+          token: "constant.numeric.line-number.match",
+        },
+        {
+          foreground: "#86b300",
+          token: "entity.name.filename.find-in-files",
+        },
+        {
+          foreground: "#e65050",
+          token: "message.error",
+        },
+        {
+          fontStyle: "bold",
+          foreground: "#86b300",
+          token: "markup.heading",
+        },
+        {
+          fontStyle: "bold",
+          foreground: "#86b300",
+          token: "markup.heading entity.name",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "markup.underline.link",
+        },
+        {
+          foreground: "#55b4d4",
+          token: "string.other.link",
+        },
+        {
+          fontStyle: "italic",
+          foreground: "#f07171",
+          token: "markup.italic",
+        },
+        {
+          fontStyle: "bold",
+          foreground: "#f07171",
+          token: "markup.bold",
+        },
+        {
+          fontStyle: "bold italic",
+          token: "markup.italic markup.bold",
+        },
+        {
+          fontStyle: "bold italic",
+          token: "markup.bold markup.italic",
+        },
+        {
+          background: "#5c616605",
+          token: "markup.raw",
+        },
+        {
+          background: "#5c61660f",
+          token: "markup.raw.inline",
+        },
+        {
+          fontStyle: "bold",
+          background: "#5c61660f",
+          foreground: "#787b8099",
+          token: "meta.separator",
+        },
+        {
+          foreground: "#4cbf99",
+          fontStyle: "italic",
+          token: "markup.quote",
+        },
+        {
+          foreground: "#f2ae49",
+          token: "markup.list punctuation.definition.list.begin",
+        },
+        {
+          foreground: "#6cbf43",
+          token: "markup.inserted",
+        },
+        {
+          foreground: "#478acc",
+          token: "markup.changed",
+        },
+        {
+          foreground: "#ff7383",
+          token: "markup.deleted",
+        },
+        {
+          foreground: "#e6ba7e",
+          token: "markup.strike",
+        },
+        {
+          background: "#5c61660f",
+          foreground: "#55b4d4",
+          token: "markup.table",
+        },
+        {
+          foreground: "#ed9366",
+          token: "text.html.markdown markup.inline.raw",
+        },
+        {
+          background: "#787b8099",
+          foreground: "#787b8099",
+          token: "text.html.markdown meta.dummy.line-break",
+        },
+        {
+          background: "#5c6166",
+          foreground: "#787b8099",
+          token: "punctuation.definition.markdown",
+        },
+        // Edits.
+        {
+          foreground: "#fa8d3e",
+          token: "number",
+        },
+      ],
+      encodedTokensColors: [],
+    });
+  }, [monaco]);
+
+  return null;
+}
--- 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/config.ts
+++ b/playground/src/Editor/config.ts
@@ -0,0 +1,63 @@
+import lzstring from "lz-string";
+import { OptionGroup } from "../ruff_options";
+
+export type Config = { [K: string]: any };
+
+/**
+ * Parse an encoded value from the options export.
+ *
+ * TODO(charlie): Use JSON for the default values.
+ */
+function parse(value: any): any {
+  if (value == "None") {
+    return null;
+  }
+  return JSON.parse(value);
+}
+
+/**
+ * The default configuration for the playground.
+ */
+export function defaultConfig(availableOptions: OptionGroup[]): Config {
+  const config: Config = {};
+  for (const group of availableOptions) {
+    if (group.name == "globals") {
+      for (const field of group.fields) {
+        config[field.name] = parse(field.default);
+      }
+    } else {
+      config[group.name] = {};
+      for (const field of group.fields) {
+        config[group.name][field.name] = parse(field.default);
+      }
+    }
+  }
+  return config;
+}
+
+/**
+ * Persist the configuration to a URL.
+ */
+export function persist(configSource: string, pythonSource: string) {
+  window.location.hash = lzstring.compressToEncodedURIComponent(
+    configSource + "$$$" + pythonSource
+  );
+}
+
+/**
+ * Restore the configuration from a URL.
+ */
+export function restore(): [string, string] | null {
+  const value = lzstring.decompressFromEncodedURIComponent(
+    window.location.hash.slice(1)
+  );
+
+  if (value) {
+    const parts = value.split("$$$");
+    const configSource = parts[0];
+    const pythonSource = parts[1];
+    return [configSource, pythonSource];
+  } else {
+    return null;
+  }
+}
--- 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/constants.ts
+++ b/playground/src/constants.ts
@@ -0,0 +1,40 @@
+import { defaultConfig } from "./Editor/config";
+import { AVAILABLE_OPTIONS } from "./ruff_options";
+
+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";
+
+export const DEFAULT_CONFIG_SOURCE = JSON.stringify(
+  defaultConfig(AVAILABLE_OPTIONS),
+  null,
+  2
+);
--- 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/ruff_options.ts
+++ b/playground/src/ruff_options.ts
@@ -0,0 +1,244 @@
+
+// This file is auto-generated by `cargo dev generate-playground-options`.
+export interface OptionGroup {
+    name: string;
+    fields: {
+        name: string;
+        default: string;
+        type: string;
+    }[];
+};
+
+export const AVAILABLE_OPTIONS: OptionGroup[] = [
+    {"name": "globals", "fields": [
+        {
+            "name": "allowed-confusables",
+            "default": '[]',
+            "type": 'Vec<char>',
+        },
+        {
+            "name": "dummy-variable-rgx",
+            "default": '"^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"',
+            "type": 'Regex',
+        },
+        {
+            "name": "extend-ignore",
+            "default": '[]',
+            "type": 'Vec<CheckCodePrefix>',
+        },
+        {
+            "name": "extend-select",
+            "default": '[]',
+            "type": 'Vec<CheckCodePrefix>',
+        },
+        {
+            "name": "external",
+            "default": '[]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "fix-only",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "ignore",
+            "default": '[]',
+            "type": 'Vec<CheckCodePrefix>',
+        },
+        {
+            "name": "line-length",
+            "default": '88',
+            "type": 'usize',
+        },
+        {
+            "name": "required-version",
+            "default": 'None',
+            "type": 'String',
+        },
+        {
+            "name": "select",
+            "default": '["E", "F"]',
+            "type": 'Vec<CheckCodePrefix>',
+        },
+        {
+            "name": "target-version",
+            "default": '"py310"',
+            "type": 'PythonVersion',
+        },
+        {
+            "name": "unfixable",
+            "default": '[]',
+            "type": 'Vec<CheckCodePrefix>',
+        },
+        {
+            "name": "update-check",
+            "default": 'true',
+            "type": 'bool',
+        },
+    ]},
+    {"name": "flake8-annotations", "fields": [
+        {
+            "name": "allow-star-arg-any",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "mypy-init-return",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "suppress-dummy-args",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "suppress-none-returning",
+            "default": 'false',
+            "type": 'bool',
+        },
+    ]},
+    {"name": "flake8-bugbear", "fields": [
+        {
+            "name": "extend-immutable-calls",
+            "default": '[]',
+            "type": 'Vec<String>',
+        },
+    ]},
+    {"name": "flake8-errmsg", "fields": [
+        {
+            "name": "max-string-length",
+            "default": '0',
+            "type": 'usize',
+        },
+    ]},
+    {"name": "flake8-import-conventions", "fields": [
+        {
+            "name": "aliases",
+            "default": '{"altair": "alt", "matplotlib.pyplot": "plt", "numpy": "np", "pandas": "pd", "seaborn": "sns"}',
+            "type": 'FxHashMap<String, String>',
+        },
+        {
+            "name": "extend-aliases",
+            "default": '{}',
+            "type": 'FxHashMap<String, String>',
+        },
+    ]},
+    {"name": "flake8-quotes", "fields": [
+        {
+            "name": "avoid-escape",
+            "default": 'true',
+            "type": 'bool',
+        },
+        {
+            "name": "docstring-quotes",
+            "default": '"double"',
+            "type": 'Quote',
+        },
+        {
+            "name": "inline-quotes",
+            "default": '"double"',
+            "type": 'Quote',
+        },
+        {
+            "name": "multiline-quotes",
+            "default": '"double"',
+            "type": 'Quote',
+        },
+    ]},
+    {"name": "flake8-tidy-imports", "fields": [
+        {
+            "name": "ban-relative-imports",
+            "default": '"parents"',
+            "type": 'Strictness',
+        },
+    ]},
+    {"name": "flake8-unused-arguments", "fields": [
+        {
+            "name": "ignore-variadic-names",
+            "default": 'false',
+            "type": 'bool',
+        },
+    ]},
+    {"name": "isort", "fields": [
+        {
+            "name": "combine-as-imports",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "extra-standard-library",
+            "default": '[]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "force-single-line",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "force-wrap-aliases",
+            "default": 'false',
+            "type": 'bool',
+        },
+        {
+            "name": "known-first-party",
+            "default": '[]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "known-third-party",
+            "default": '[]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "single-line-exclusions",
+            "default": '[]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "split-on-trailing-comma",
+            "default": 'true',
+            "type": 'bool',
+        },
+    ]},
+    {"name": "mccabe", "fields": [
+        {
+            "name": "max-complexity",
+            "default": '10',
+            "type": 'usize',
+        },
+    ]},
+    {"name": "pep8-naming", "fields": [
+        {
+            "name": "classmethod-decorators",
+            "default": '["classmethod"]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "ignore-names",
+            "default": '["setUp", "tearDown", "setUpClass", "tearDownClass", "setUpModule", "tearDownModule", "asyncSetUp", "asyncTearDown", "setUpTestData", "failureException", "longMessage", "maxDiff"]',
+            "type": 'Vec<String>',
+        },
+        {
+            "name": "staticmethod-decorators",
+            "default": '["staticmethod"]',
+            "type": 'Vec<String>',
+        },
+    ]},
+    {"name": "pydocstyle", "fields": [
+        {
+            "name": "convention",
+            "default": 'None',
+            "type": 'Convention',
+        },
+    ]},
+    {"name": "pyupgrade", "fields": [
+        {
+            "name": "keep-runtime-typing",
+            "default": 'false',
+            "type": 'bool',
+        },
+    ]},
+];
--- 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 +1,17 @@
+/** @type {import('tailwindcss').Config} */
+const defaultTheme = require("tailwindcss/defaultTheme");
+
+module.exports = {
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  theme: {
+    extend: {
+      colors: {
+        ayu: "#f07171",
+      },
+      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
@@ -12,6 +12,7 @@ classifiers = [
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3 :: Only",
    "Topic :: Software Development :: Libraries :: Python Modules",
    "Topic :: Software Development :: Quality Assurance",
@@ -32,6 +33,14 @@ build-backend = "maturin"
 bindings = "bin"
 strip = true

+[tool.ruff]
+update-check = true
+
 [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/README.md
+++ b/resources/test/fixtures/README.md
@@ -0,0 +1,3 @@
+# fixtures
+
+Fixture files used for snapshot testing.
--- a/resources/test/fixtures/eradicate/ERA001.py
+++ b/resources/test/fixtures/eradicate/ERA001.py
@@ -5,9 +5,11 @@ a = 4
 #foo(1, 2, 3)

 def foo(x, y, z):
-    contentet = 1 # print('hello')
+    content = 1 # print('hello')
    print(x, y, z)

    # This is a real comment.
    #return True
    return False
+
+#import os  # noqa: ERA001
--- a/resources/test/fixtures/flake8_annotations/allow_overload.py
+++ b/resources/test/fixtures/flake8_annotations/allow_overload.py
@@ -0,0 +1,49 @@
+from typing import overload
+
+
+@overload
+def foo(i: int) -> "int":
+    ...
+
+
+@overload
+def foo(i: "str") -> "str":
+    ...
+
+
+def foo(i):
+    return i
+
+
+@overload
+def bar(i: int) -> "int":
+    ...
+
+
+@overload
+def bar(i: "str") -> "str":
+    ...
+
+
+class X:
+    def bar(i):
+        return i
+
+
+# TODO(charlie): This third case should raise an error (as in Mypy), because we have a
+# statement between the interfaces and implementation.
+@overload
+def baz(i: int) -> "int":
+    ...
+
+
+@overload
+def baz(i: "str") -> "str":
+    ...
+
+
+x = 1
+
+
+def baz(i):
+    return i
--- a/resources/test/fixtures/flake8_blind_except/BLE.py
+++ b/resources/test/fixtures/flake8_blind_except/BLE.py
@@ -53,3 +53,11 @@ try:
        raise e
 except Exception:
    pass
+
+
+try:
+    pass
+except Exception as e:
+    raise bad
+except BaseException:
+    pass
--- a/resources/test/fixtures/flake8_boolean_trap/FBT.py
+++ b/resources/test/fixtures/flake8_boolean_trap/FBT.py
@@ -55,3 +55,5 @@ a.get("hello", False)
 {}.pop(True, False)
 dict.fromkeys(("world",), True)
 {}.deploy(True, False)
+getattr(someobj, attrname, False)
+mylist.index(True)
--- a/resources/test/fixtures/flake8_bugbear/B009_B010.py
+++ b/resources/test/fixtures/flake8_bugbear/B009_B010.py
@@ -20,6 +20,8 @@ getattr(foo, "_123abc")
 getattr(foo, "abc123")
 getattr(foo, r"abc123")
 _ = lambda x: getattr(x, "bar")
+if getattr(x, "bar"):
+    pass

 # Valid setattr usage
 setattr(foo, bar, None)
@@ -28,6 +30,8 @@ setattr(foo, "123abc", None)
 setattr(foo, r"123\abc", None)
 setattr(foo, "except", None)
 _ = lambda x: setattr(x, "bar", 1)
+if setattr(x, "bar", 1):
+    pass

 # Invalid usage
 setattr(foo, "bar", None)
--- a/resources/test/fixtures/flake8_bugbear/B905.py
+++ b/resources/test/fixtures/flake8_bugbear/B905.py
@@ -0,0 +1,10 @@
+zip()
+zip(range(3))
+zip("a", "b")
+zip("a", "b", *zip("c"))
+zip(zip("a"), strict=False)
+zip(zip("a", strict=True))
+
+zip(range(3), strict=True)
+zip("a", "b", strict=False)
+zip("a", "b", "c", strict=True)
--- a/resources/test/fixtures/flake8_datetimez/DTZ001.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ001.py
@@ -0,0 +1,21 @@
+import datetime
+
+# no args
+datetime.datetime(2000, 1, 1, 0, 0, 0)
+
+# none args
+datetime.datetime(2000, 1, 1, 0, 0, 0, 0, None)
+
+# not none arg
+datetime.datetime(2000, 1, 1, 0, 0, 0, 0, datetime.timezone.utc)
+
+# no kwargs
+datetime.datetime(2000, 1, 1, fold=1)
+
+# none kwargs
+datetime.datetime(2000, 1, 1, tzinfo=None)
+
+from datetime import datetime
+
+# no args unqualified
+datetime(2000, 1, 1, 0, 0, 0)
--- a/resources/test/fixtures/flake8_datetimez/DTZ002.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ002.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.datetime.today()
+
+from datetime import datetime
+
+# unqualified
+datetime.today()
--- a/resources/test/fixtures/flake8_datetimez/DTZ003.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ003.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.datetime.utcnow()
+
+from datetime import datetime
+
+# unqualified
+datetime.utcnow()
--- a/resources/test/fixtures/flake8_datetimez/DTZ004.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ004.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.datetime.utcfromtimestamp(1234)
+
+from datetime import datetime
+
+# unqualified
+datetime.utcfromtimestamp(1234)
--- a/resources/test/fixtures/flake8_datetimez/DTZ005.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ005.py
@@ -0,0 +1,18 @@
+import datetime
+
+# no args
+datetime.datetime.now()
+
+# wrong keywords
+datetime.datetime.now(bad=datetime.timezone.utc)
+
+# none args
+datetime.datetime.now(None)
+
+# none keywords
+datetime.datetime.now(tz=None)
+
+from datetime import datetime
+
+# no args unqualified
+datetime.now()
--- a/resources/test/fixtures/flake8_datetimez/DTZ006.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ006.py
@@ -0,0 +1,18 @@
+import datetime
+
+# no args
+datetime.datetime.fromtimestamp(1234)
+
+# wrong keywords
+datetime.datetime.fromtimestamp(1234, bad=datetime.timezone.utc)
+
+# none args
+datetime.datetime.fromtimestamp(1234, None)
+
+# none keywords
+datetime.datetime.fromtimestamp(1234, tz=None)
+
+from datetime import datetime
+
+# no args unqualified
+datetime.fromtimestamp(1234)
--- a/resources/test/fixtures/flake8_datetimez/DTZ007.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ007.py
@@ -0,0 +1,35 @@
+import datetime
+
+# bad format
+datetime.datetime.strptime("something", "%H:%M:%S%Z")
+
+# no replace or astimezone
+datetime.datetime.strptime("something", "something")
+
+# wrong replace
+datetime.datetime.strptime("something", "something").replace(hour=1)
+
+# none replace
+datetime.datetime.strptime("something", "something").replace(tzinfo=None)
+
+# OK
+datetime.datetime.strptime("something", "something").replace(
+    tzinfo=datetime.timezone.utc
+)
+
+# OK
+datetime.datetime.strptime("something", "something").astimezone()
+
+# OK
+datetime.datetime.strptime("something", "%H:%M:%S%z")
+
+# OK
+datetime.datetime.strptime("something", something).astimezone()
+
+# OK
+datetime.datetime.strptime("something", something).replace(tzinfo=datetime.timezone.utc)
+
+from datetime import datetime
+
+# no replace orastimezone unqualified
+datetime.strptime("something", "something")
--- a/resources/test/fixtures/flake8_datetimez/DTZ011.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ011.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.date.today()
+
+from datetime import date
+
+# unqualified
+date.today()
--- a/resources/test/fixtures/flake8_datetimez/DTZ012.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ012.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.date.fromtimestamp(1234)
+
+from datetime import date
+
+# unqualified
+date.fromtimestamp(1234)
--- a/resources/test/fixtures/flake8_debugger/T100.py
+++ b/resources/test/fixtures/flake8_debugger/T100.py
@@ -1,6 +1,5 @@
 breakpoint()

-
 import pdb
 import builtins
 from builtins import breakpoint
@@ -9,7 +8,6 @@ from celery.contrib.rdb import set_trace
 from celery.contrib import rdb
 import celery.contrib.rdb

-
 breakpoint()
 st()
 set_trace()
--- a/resources/test/fixtures/flake8_errmsg/EM.py
+++ b/resources/test/fixtures/flake8_errmsg/EM.py
@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+
+def f_a():
+    raise RuntimeError("This is an example exception")
+
+
+def f_a_short():
+    raise RuntimeError("Error")
+
+
+def f_b():
+    example = "example"
+    raise RuntimeError(f"This is an {example} exception")
+
+
+def f_c():
+    raise RuntimeError("This is an {example} exception".format(example="example"))
+
+
+def f_ok():
+    msg = "hello"
+    raise RuntimeError(msg)
--- a/resources/test/fixtures/flake8_import_conventions/custom.py
+++ b/resources/test/fixtures/flake8_import_conventions/custom.py
@@ -0,0 +1,25 @@
+import math  # not checked
+
+import altair  # unconventional
+import dask.array  # unconventional
+import dask.dataframe  # unconventional
+import matplotlib.pyplot  # unconventional
+import numpy  # unconventional
+import pandas  # unconventional
+import seaborn  # unconventional
+
+import altair as altr  # unconventional
+import matplotlib.pyplot as plot  # unconventional
+import dask.array as darray  # unconventional
+import dask.dataframe as ddf  # unconventional
+import numpy as nmp  # unconventional
+import pandas as pdas  # unconventional
+import seaborn as sbrn  # unconventional
+
+import altair as alt  # conventional
+import dask.array as da  # conventional
+import dask.dataframe as dd  # conventional
+import matplotlib.pyplot as plt  # conventional
+import numpy as np  # conventional
+import pandas as pd  # conventional
+import seaborn as sns  # conventional
--- a/resources/test/fixtures/flake8_import_conventions/defaults.py
+++ b/resources/test/fixtures/flake8_import_conventions/defaults.py
@@ -0,0 +1,19 @@
+import math  # not checked
+
+import altair  # unconventional
+import matplotlib.pyplot  # unconventional
+import numpy  # unconventional
+import pandas  # unconventional
+import seaborn  # unconventional
+
+import altair as altr  # unconventional
+import matplotlib.pyplot as plot  # unconventional
+import numpy as nmp  # unconventional
+import pandas as pdas  # unconventional
+import seaborn as sbrn  # unconventional
+
+import altair as alt  # conventional
+import matplotlib.pyplot as plt  # conventional
+import numpy as np  # conventional
+import pandas as pd  # conventional
+import seaborn as sns  # conventional
--- a/resources/test/fixtures/flake8_import_conventions/override_default.py
+++ b/resources/test/fixtures/flake8_import_conventions/override_default.py
@@ -0,0 +1,19 @@
+import math  # not checked
+
+import altair  # unconventional
+import matplotlib.pyplot  # unconventional
+import numpy  # unconventional
+import pandas  # unconventional
+import seaborn  # unconventional
+
+import altair as altr  # unconventional
+import matplotlib.pyplot as plot  # unconventional
+import numpy as np  # unconventional
+import pandas as pdas  # unconventional
+import seaborn as sbrn  # unconventional
+
+import altair as alt  # conventional
+import matplotlib.pyplot as plt  # conventional
+import numpy as nmp  # conventional
+import pandas as pd  # conventional
+import seaborn as sns  # conventional
--- a/resources/test/fixtures/flake8_import_conventions/remove_default.py
+++ b/resources/test/fixtures/flake8_import_conventions/remove_default.py
@@ -0,0 +1,19 @@
+import math  # not checked
+
+import altair  # unconventional
+import matplotlib.pyplot  # unconventional
+import numpy  # not checked
+import pandas  # unconventional
+import seaborn  # unconventional
+
+import altair as altr  # unconventional
+import matplotlib.pyplot as plot  # unconventional
+import numpy as nmp  # not checked
+import pandas as pdas  # unconventional
+import seaborn as sbrn  # unconventional
+
+import altair as alt  # conventional
+import matplotlib.pyplot as plt  # conventional
+import numpy as np  # not checked
+import pandas as pd  # conventional
+import seaborn as sns  # conventional
--- a/resources/test/fixtures/flake8_print/T201.py
+++ b/resources/test/fixtures/flake8_print/T201.py
@@ -1 +1,10 @@
+import sys
+import tempfile
+
 print("Hello, world!")  # T201
+print("Hello, world!", file=None)  # T201
+print("Hello, world!", file=sys.stdout)  # T201
+print("Hello, world!", file=sys.stderr)  # T201
+
+with tempfile.NamedTemporaryFile() as fp:
+    print("Hello, world!", file=fp)  # OK
--- a/resources/test/fixtures/flake8_print/T203.py
+++ b/resources/test/fixtures/flake8_print/T203.py
@@ -2,7 +2,6 @@ from pprint import pprint

 pprint("Hello, world!")  # T203

-
 import pprint

 pprint.pprint("Hello, world!")  # T203
--- a/resources/test/fixtures/flake8_return/RET504.py
+++ b/resources/test/fixtures/flake8_return/RET504.py
@@ -6,18 +6,6 @@ def x():
    return a  # error


-def x():
-    b, a = 1, 2
-    print(b)
-    return a  # error
-
-
-def x():
-    a = 1
-    print()
-    return a  # error
-
-
 def x():
    a = 1
    print(a)
@@ -53,7 +41,6 @@ def x():

 # https://github.com/afonasev/flake8-return/issues/47#issue-641117366
 def user_agent_username(username=None):
-
    if not username:
        return ""

@@ -130,6 +117,26 @@ def x():
    return val


+def x():
+    a = 1
+    print(f"a={a}")
+    return a
+
+
+# Considered OK, since functions can have side effects.
+def x():
+    b, a = 1, 2
+    print(b)
+    return a
+
+
+# Considered OK, since functions can have side effects.
+def x():
+    a = 1
+    print()
+    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:
@@ -230,3 +237,15 @@ def close(self):
            any_failed = True
            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
+        return X
--- a/resources/test/fixtures/flake8_simplify/SIM118.py
+++ b/resources/test/fixtures/flake8_simplify/SIM118.py
@@ -0,0 +1,12 @@
+key in dict.keys() # SIM118
+
+foo["bar"] in dict.keys() # SIM118
+
+foo() in dict.keys() # SIM118
+
+for key in dict.keys(): # SIM118
+    pass
+
+for key in list(dict.keys()):
+    if some_property(key):
+        del dict[key]
--- a/resources/test/fixtures/flake8_tidy_imports/TID252.py
+++ b/resources/test/fixtures/flake8_tidy_imports/TID252.py
--- a/resources/test/fixtures/flake8_unused_arguments/ARG.py
+++ b/resources/test/fixtures/flake8_unused_arguments/ARG.py
@@ -0,0 +1,155 @@
+from abc import abstractmethod
+from typing import overload
+from typing_extensions import override
+
+
+###
+# Unused arguments on functions.
+###
+def f(self, x):
+    print("Hello, world!")
+
+
+def f(cls, x):
+    print("Hello, world!")
+
+
+def f(self, x):
+    ...
+
+
+def f(cls, x):
+    ...
+
+
+###
+# Unused arguments on lambdas.
+###
+lambda x: print("Hello, world!")
+
+
+class C:
+    ###
+    # Unused arguments.
+    ###
+    def f(self, x):
+        print("Hello, world!")
+
+    def f(self, /, x):
+        print("Hello, world!")
+
+    def f(cls, x):
+        print("Hello, world!")
+
+    @classmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    def f(x):
+        print("Hello, world!")
+
+    ###
+    # Unused arguments attached to empty functions (OK).
+    ###
+    def f(self, x):
+        ...
+
+    def f(self, /, x):
+        ...
+
+    def f(cls, x):
+        ...
+
+    @classmethod
+    def f(cls, x):
+        ...
+
+    @staticmethod
+    def f(cls, x):
+        ...
+
+    @staticmethod
+    def f(x):
+        ...
+
+    ###
+    # Unused functions attached to abstract methods (OK).
+    ###
+    @abstractmethod
+    def f(self, x):
+        print("Hello, world!")
+
+    @abstractmethod
+    def f(self, /, x):
+        print("Hello, world!")
+
+    @abstractmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @classmethod
+    @abstractmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @abstractmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @abstractmethod
+    def f(x):
+        print("Hello, world!")
+
+    ###
+    # Unused functions attached to overrides (OK).
+    ###
+    @override
+    def f(self, x):
+        print("Hello, world!")
+
+    @override
+    def f(self, /, x):
+        print("Hello, world!")
+
+    @override
+    def f(cls, x):
+        print("Hello, world!")
+
+    @classmethod
+    @override
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @override
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @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/flake8_unused_arguments/ignore_variadic_names.py
+++ b/resources/test/fixtures/flake8_unused_arguments/ignore_variadic_names.py
@@ -0,0 +1,14 @@
+def f(a, b):
+    print("Hello, world!")
+
+
+def f(a, b, *args, **kwargs):
+    print("Hello, world!")
+
+
+class C:
+    def f(self, a, b):
+        print("Hello, world!")
+
+    def f(self, a, b, *args, **kwargs):
+        print("Hello, world!")
--- 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/insert_empty_lines.py
+++ b/resources/test/fixtures/isort/insert_empty_lines.py
@@ -39,3 +39,27 @@ if True:
    import collections
    import typing
    def f(): pass
+
+
+import os
+
+# Comment goes here.
+
+def f():
+    pass
+
+
+import os
+
+# Comment goes here.
+def f():
+    pass
+
+
+import os
+
+# Comment goes here.
+
+# And another.
+def f():
+    pass
--- a/resources/test/fixtures/isort/insert_empty_lines.pyi
+++ b/resources/test/fixtures/isort/insert_empty_lines.pyi
@@ -0,0 +1,65 @@
+import a
+import b
+x = 1
+import os
+import sys
+def f():
+    pass
+if True:
+    x = 1
+    import collections
+    import typing
+class X: pass
+y = 1
+import os
+import sys
+"""Docstring"""
+
+if True:
+    import os
+
+
+def f():
+    pass
+
+
+if True:
+    import os
+def f():
+    pass
+
+if True:
+    x = 1
+    import collections
+    import typing
+    class X: pass
+
+if True:
+    x = 1
+    import collections
+    import typing
+    def f(): pass
+
+
+import os
+
+# Comment goes here.
+
+def f():
+    pass
+
+
+import os
+
+# Comment goes here.
+def f():
+    pass
+
+
+import os
+
+# Comment goes here.
+
+# And another.
+def f():
+    pass
--- a/resources/test/fixtures/isort/leading_prefix.py
+++ b/resources/test/fixtures/isort/leading_prefix.py
@@ -4,3 +4,10 @@ import os
 if True:
    x = 1; import sys
    import os
+
+if True:
+    x = 1; \
+        import os
+
+x = 1; \
+import os
--- 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/pycodestyle/E40.py
+++ b/resources/test/fixtures/pycodestyle/E40.py
@@ -0,0 +1,61 @@
+#: E401
+import os, sys
+#: Okay
+import os
+import sys
+
+from subprocess import Popen, PIPE
+
+from myclass import MyClass
+from foo.bar.yourclass import YourClass
+
+import myclass
+import foo.bar.yourclass
+#: Okay
+__all__ = ['abc']
+
+import foo
+#: Okay
+__version__ = "42"
+
+import foo
+#: Okay
+__author__ = "Simon Gomizelj"
+
+import foo
+#: Okay
+try:
+    import foo
+except ImportError:
+    pass
+else:
+    print('imported foo')
+finally:
+    print('made attempt to import foo')
+
+import bar
+#: Okay
+with warnings.catch_warnings():
+    warnings.filterwarnings("ignore", DeprecationWarning)
+    import foo
+
+import bar
+#: Okay
+if False:
+    import foo
+elif not True:
+    import bar
+else:
+    import mwahaha
+
+import bar
+#: E402
+VERSION = '1.2.3'
+
+import foo
+#: E402
+import foo
+
+a = 1
+
+import bar
--- a/resources/test/fixtures/pycodestyle/E501.py
+++ b/resources/test/fixtures/pycodestyle/E501.py
@@ -55,3 +55,8 @@ sit amet  consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labor

 # OK
 # https://loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong.url.com
+
+# Not OK
+_ = """
+Source: https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+"""
--- a/resources/test/fixtures/pycodestyle/E721.py
+++ b/resources/test/fixtures/pycodestyle/E721.py
@@ -15,7 +15,7 @@ import types
 if type(res) is not types.ListType:
    pass
 #: E721
-assert type(res) == type(False) or type(res) == type(None)
+assert type(res) == type(False)
 #: E721
 assert type(res) == type([])
 #: E721
@@ -52,3 +52,5 @@ if isinstance(res, types.MethodType):
    pass
 if type(a) != type(b) or type(a) == type(ccc):
    pass
+
+assert type(res) == type(None)
--- a/resources/test/fixtures/pycodestyle/W292_2.py
+++ b/resources/test/fixtures/pycodestyle/W292_2.py
@@ -1,2 +1,2 @@
 def fn() -> None:
-    pass
+    print("Newline present (no W292)")
--- a/resources/test/fixtures/pycodestyle/W292_3.py
+++ b/resources/test/fixtures/pycodestyle/W292_3.py
--- a/resources/test/fixtures/pycodestyle/W292_4.py
+++ b/resources/test/fixtures/pycodestyle/W292_4.py
@@ -0,0 +1 @@
+ 
--- a/resources/test/fixtures/pycodestyle/constant_literals.py
+++ b/resources/test/fixtures/pycodestyle/constant_literals.py
@@ -0,0 +1,39 @@
+###
+# Errors
+###
+if "abc" is "def":  # F632 (fix)
+    pass
+if "abc" is None:  # F632 (fix, but leaves behind unfixable E711)
+    pass
+if None is "abc":  # F632 (fix, but leaves behind unfixable E711)
+    pass
+if "abc" is False:  # F632 (fix, but leaves behind unfixable E712)
+    pass
+if False is "abc":  # F632 (fix, but leaves behind unfixable E712)
+    pass
+if False == None:  # E711, E712 (fix)
+    pass
+if None == False:  # E711, E712 (fix)
+    pass
+
+###
+# Unfixable errors
+###
+if "abc" == None:  # E711
+    pass
+if None == "abc":  # E711
+    pass
+if "abc" == False:  # E712
+    pass
+if False == "abc":  # E712
+    pass
+
+###
+# Non-errors
+###
+if "def" == "abc":
+    pass
+if False is None:
+    pass
+if None is False:
+    pass
--- 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
@@ -0,0 +1,16 @@
+"""Test: noqa directives."""
+
+from module import (
+    A,  # noqa: F401
+    B,
+)
+
+from module import (
+    A,  # noqa: F401
+    B,  # noqa: F401
+)
+
+from module import (
+    A,
+    B,
+)
--- a/resources/test/fixtures/pyflakes/F504.py
+++ b/resources/test/fixtures/pyflakes/F504.py
@@ -4,3 +4,6 @@ a = "wrong"

 hidden = {"a": "!"}
 "%(a)s %(c)s" % {"x": 1, **hidden}  # Ok (cannot see through splat)
+
+"%(a)s" % {"a": 1, r"b": "!"}  # F504 ("b" not used)
+"%(a)s" % {'a': 1, u"b": "!"}  # F504 ("b" not used)
--- a/resources/test/fixtures/pyflakes/F541.py
+++ b/resources/test/fixtures/pyflakes/F541.py
@@ -9,3 +9,4 @@ e = (
 )

 g = f"ghi{123:{45}}"
+h = "x" "y" f"z"
--- a/resources/test/fixtures/pyflakes/F811_0.py
+++ b/resources/test/fixtures/pyflakes/F811_0.py
@@ -0,0 +1,11 @@
+def foo(x):
+    return x
+
+
+@foo
+def bar():
+    pass
+
+
+def bar():
+    pass
--- a/resources/test/fixtures/pyflakes/F811_1.py
+++ b/resources/test/fixtures/pyflakes/F811_1.py
@@ -0,0 +1 @@
+import fu as FU, bar as FU
--- a/resources/test/fixtures/pyflakes/F811_10.py
+++ b/resources/test/fixtures/pyflakes/F811_10.py
@@ -0,0 +1,8 @@
+"""Test that importing a module twice using a nested does not issue a warning."""
+try:
+    if True:
+        if True:
+            import os
+except:
+    import os
+os.path
--- a/Show More
+++ b/Show More