Bump Ruff version to 0.0.240

Resolves #2461.

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,10 @@
+<!--
+Thank you for taking the time to report an issue! We're glad to have you involved with Ruff.
+
+If you're filing a bug report, please consider including the following information:
+
+- A minimal code snippet that reproduces the bug.
+- The command you invoked (e.g., `ruff /path/to/file.py --fix`), ideally including the `--isolated` flag.
+- The current Ruff settings (any relevant sections from your `pyproject.toml`).
+- The current Ruff version (`ruff --version`).
+-->

.github/release.yml

@@ -0,0 +1,19 @@
+# https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes#configuring-automatically-generated-release-notes
+changelog:
+  categories:
+    - title: Breaking Changes
+      labels:
+        - breaking
+    - title: Rules
+      labels:
+        - rule
+        - autofix
+    - title: Settings
+      labels:
+        - configuration
+    - title: Bug Fixes
+      labels:
+        - bug
+    - title: Other Changes
+      labels:
+        - "*"

.github/workflows/ci.yaml

@@ -4,54 +4,40 @@ on:
   push:
     branches: [main]
   pull_request:
-    branches: [main]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+env:
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  CARGO_TERM_COLOR: always
+  RUSTUP_MAX_RETRIES: 10
 
 jobs:
-  cargo_build:
+  cargo-build:
     name: "cargo build"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-      - 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 }}-
-      - run: cargo build --all --release
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v1
+      - run: cargo build --all
+      - run: ./target/debug/ruff_dev generate-all
+      - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated. Run 'cargo dev generate-all'."
+      - run: git diff --quiet ruff.schema.json || echo "::error file=ruff.schema.json::This file is outdated. Run 'cargo dev generate-all'."
+      - run: git diff --exit-code -- README.md ruff.schema.json
 
-  cargo_fmt:
+  cargo-fmt:
     name: "cargo fmt"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - 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
-        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 }}-
+      - name: "Install Rust toolchain"
+        run: rustup component add rustfmt
       - run: cargo fmt --all --check
 
   cargo_clippy:
@@ -59,74 +45,80 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2022-11-01
-          override: true
-          components: clippy
-      - 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 }}-
-      - run: cargo clippy --all -- -D warnings
+      - name: "Install Rust toolchain"
+        run: |
+          rustup component add clippy
+          rustup target add wasm32-unknown-unknown
+      - uses: Swatinem/rust-cache@v1
+      - run: cargo clippy --workspace --all-targets --all-features -- -D warnings -W clippy::pedantic
+      - run: cargo clippy -p ruff --target wasm32-unknown-unknown --all-features -- -D warnings -W clippy::pedantic
 
-  cargo_test:
-    name: "cargo test"
+  cargo-test:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+    runs-on: ${{ matrix.os }}
+    name: "cargo test | ${{ matrix.os }}"
+    steps:
+      - uses: actions/checkout@v3
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v1
+      - run: cargo install cargo-insta
+      - run: pip install black[d]==22.12.0
+      - name: "Run tests (Ubuntu)"
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+        run: |
+          cargo insta test --all --delete-unreferenced-snapshots
+          git diff --exit-code
+      - name: "Run tests (Windows)"
+        if: ${{ matrix.os == 'windows-latest' }}
+        shell: bash
+        run: |
+          cargo insta test --all
+          git diff --exit-code
+      - run: cargo test --package ruff_cli --test black_compatibility_test -- --ignored
+      # Check for broken links in the documentation.
+      - run: cargo doc --all --no-deps
+        env:
+          # Setting RUSTDOCFLAGS because `cargo doc --check` isn't yet implemented (https://github.com/rust-lang/cargo/issues/10025).
+          RUSTDOCFLAGS: "-D warnings"
+
+  scripts:
+    name: "test scripts"
     runs-on: ubuntu-latest
     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 }}-
-      - run: cargo test --all
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v1
+      - run: ./scripts/add_rule.py --name DoTheThing --code PLC999 --linter pylint
+      - run: cargo check
+      - run: |
+         ./scripts/add_plugin.py test --url https://pypi.org/project/-test/0.1.0/ --prefix TST
+         ./scripts/add_rule.py --name FirstRule --code TST001 --linter test
+      - run: cargo check
 
-  maturin_build:
+  maturin-build:
     name: "maturin build"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2022-11-01
-          override: true
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v1
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - run: pip install maturin
-      - 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 }}-
       - run: maturin build -b bin
+      - run: python scripts/transform_readme.py --target pypi
+
+  typos:
+    name: "spell check"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: crate-ci/typos@master
+      with:
+        files: .

.github/workflows/docs.yaml

@@ -0,0 +1,35 @@
+name: mkdocs
+
+on:
+  push:
+    paths:
+      - README.md
+      - mkdocs.template.yml
+      - .github/workflows/docs.yaml
+    branches: [ main ]
+  workflow_dispatch:
+
+
+jobs:
+  mkdocs:
+    runs-on: ubuntu-latest
+    env:
+      CF_API_TOKEN_EXISTS: ${{ secrets.CF_API_TOKEN != '' }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+      - name: "Install dependencies"
+        run: |
+          pip install "mkdocs~=1.4.2" "mkdocs-material~=9.0.6"
+      - name: "Copy README File"
+        run: |
+          python scripts/transform_readme.py --target mkdocs
+          python scripts/generate_mkdocs.py
+          mkdocs build --strict
+      - 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 site --project-name=ruff-docs --branch ${GITHUB_HEAD_REF} --commit-hash ${GITHUB_SHA}

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

@@ -10,6 +10,10 @@ env:
   PACKAGE_NAME: flake8-to-ruff
   CRATE_NAME: flake8_to_ruff
   PYTHON_VERSION: "3.7" # to build abi3 wheels
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  CARGO_TERM_COLOR: always
+  RUSTUP_MAX_RETRIES: 10
 
 jobs:
   macos-x86_64:
@@ -20,23 +24,18 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels - x86_64
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - name: "Build wheels - x86_64"
         uses: messense/maturin-action@v1
         with:
           target: x86_64
           args: --release --out dist --sdist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
-      - name: Install built wheel - x86_64
+      - name: "Install built wheel - x86_64"
         run: |
           pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -48,22 +47,17 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels - universal2
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - name: "Build wheels - universal2"
         uses: messense/maturin-action@v1
         with:
           args: --release --universal2 --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
-      - name: Install built wheel - universal2
+      - name: "Install built wheel - universal2"
         run: |
           pip install dist/${{ env.CRATE_NAME }}-*universal2.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -79,24 +73,19 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: ${{ matrix.target }}
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
+      - name: "Install built wheel"
         shell: bash
         run: |
           python -m pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -112,19 +101,18 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Build wheels
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
+      - name: "Install built wheel"
         if: matrix.target == 'x86_64'
         run: |
           pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -139,14 +127,13 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
-      - name: Build wheels
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           manylinux: auto
           args: --no-default-features --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
-      - uses: uraimo/run-on-arch-action@v2.0.5
+      - uses: uraimo/run-on-arch-action@v2.5.0
         if: matrix.target != 'ppc64'
         name: Install built wheel
         with:
@@ -159,8 +146,8 @@ jobs:
             pip3 install -U pip
           run: |
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -178,14 +165,13 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Build wheels
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           manylinux: musllinux_1_2
           args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
+      - name: "Install built wheel"
         if: matrix.target == 'x86_64-unknown-linux-musl'
         uses: addnab/docker-run-action@v3
         with:
@@ -194,8 +180,8 @@ jobs:
           run: |
             apk add py3-pip
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links /io/dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -214,13 +200,12 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
-      - name: Build wheels
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
           manylinux: musllinux_1_2
           args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
-          maturin-version: "v0.13.0"
       - uses: uraimo/run-on-arch-action@master
         name: Install built wheel
         with:
@@ -231,8 +216,8 @@ jobs:
             apk add py3-pip
           run: |
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -255,19 +240,18 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: pypy${{ matrix.python-version }}
-      - name: Build wheels
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
-          maturin-version: "v0.13.0"
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist -i pypy${{ matrix.python-version }} -m ./${{ env.CRATE_NAME }}/Cargo.toml
-      - name: Install built wheel
+      - name: "Install built wheel"
         if: matrix.target == 'x86_64'
         run: |
           pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -285,11 +269,11 @@ jobs:
       - musllinux-cross
       - pypy
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
         with:
           name: wheels
       - uses: actions/setup-python@v4
-      - name: Publish to PyPi
+      - name: "Publish to PyPi"
         env:
           TWINE_USERNAME: __token__
           TWINE_PASSWORD: ${{ secrets.FLAKE8_TO_RUFF_TOKEN }}

.github/workflows/playground.yaml

@@ -0,0 +1,47 @@
+name: "[Playground] Release"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+
+env:
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  CARGO_TERM_COLOR: always
+  RUSTUP_MAX_RETRIES: 10
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    env:
+       CF_API_TOKEN_EXISTS: ${{ secrets.CF_API_TOKEN != '' }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: "Install Rust toolchain"
+        run: rustup target add 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 . -- -p ruff
+      - 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}

.github/workflows/ruff.yaml

@@ -1,9 +1,9 @@
 name: "[ruff] Release"
 
 on:
-  create:
-    tags:
-      - v*
+  workflow_dispatch:
+  release:
+    types: [published]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -12,6 +12,10 @@ concurrency:
 env:
   PACKAGE_NAME: ruff
   PYTHON_VERSION: "3.7" # to build abi3 wheels
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  CARGO_TERM_COLOR: always
+  RUSTUP_MAX_RETRIES: 10
 
 jobs:
   macos-x86_64:
@@ -22,23 +26,18 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels - x86_64
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels - x86_64"
         uses: messense/maturin-action@v1
         with:
           target: x86_64
           args: --release --out dist --sdist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel - x86_64
+      - name: "Install built wheel - x86_64"
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -50,22 +49,17 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels - universal2
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels - universal2"
         uses: messense/maturin-action@v1
         with:
           args: --release --universal2 --out dist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel - universal2
+      - name: "Install built wheel - universal2"
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*universal2.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -81,24 +75,19 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: ${{ matrix.target }}
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           args: --release --out dist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
+      - name: "Install built wheel"
         shell: bash
         run: |
           python -m pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -114,19 +103,20 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Build wheels
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
+      - name: "Install built wheel"
         if: matrix.target == 'x86_64'
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -141,14 +131,15 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
-      - name: Build wheels
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           manylinux: auto
           args: --no-default-features --release --out dist
-          maturin-version: "v0.13.0"
-      - uses: uraimo/run-on-arch-action@v2.0.5
+      - uses: uraimo/run-on-arch-action@v2.5.0
         if: matrix.target != 'ppc64'
         name: Install built wheel
         with:
@@ -161,8 +152,8 @@ jobs:
             pip3 install -U pip
           run: |
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -180,14 +171,15 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Build wheels
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.target }}
           manylinux: musllinux_1_2
           args: --release --out dist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
+      - name: "Install built wheel"
         if: matrix.target == 'x86_64-unknown-linux-musl'
         uses: addnab/docker-run-action@v3
         with:
@@ -196,8 +188,8 @@ jobs:
           run: |
             apk add py3-pip
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links /io/dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -216,13 +208,14 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
-      - name: Build wheels
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
           manylinux: musllinux_1_2
           args: --release --out dist
-          maturin-version: "v0.13.0"
       - uses: uraimo/run-on-arch-action@master
         name: Install built wheel
         with:
@@ -233,8 +226,8 @@ jobs:
             apk add py3-pip
           run: |
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -257,19 +250,20 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: pypy${{ matrix.python-version }}
-      - name: Build wheels
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
         uses: messense/maturin-action@v1
         with:
-          maturin-version: "v0.13.0"
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist -i pypy${{ matrix.python-version }}
-      - name: Install built wheel
+      - name: "Install built wheel"
         if: matrix.target == 'x86_64'
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
@@ -288,14 +282,17 @@ jobs:
       - pypy
     if: "startsWith(github.ref, 'refs/tags/')"
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
         with:
           name: wheels
       - uses: actions/setup-python@v4
-      - name: Publish to PyPi
+      - name: "Publish to PyPi"
         env:
           TWINE_USERNAME: __token__
           TWINE_PASSWORD: ${{ secrets.RUFF_TOKEN }}
         run: |
           pip install --upgrade twine
           twine upload --skip-existing *
+      - name: "Update pre-commit mirror"
+        run: |
+          curl -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ secrets.RUFF_PRE_COMMIT_PAT }}" -H "X-GitHub-Api-Version: 2022-11-28" https://api.github.com/repos/charliermarsh/ruff-pre-commit/dispatches --data '{"event_type": "pypi_release"}'

.gitignore

@@ -1,6 +1,9 @@
 # Local cache
 .ruff_cache
 resources/test/cpython
+docs/
+mkdocs.yml
+.overrides
 
 ###
 # Rust.gitignore
@@ -181,3 +184,7 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
+.vimspector.json
+
+# Visual Studio Code
+.vscode/

.pre-commit-config.yaml

@@ -1,10 +1,31 @@
 repos:
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.111
+    rev: v0.0.240
     hooks:
       - id: ruff
+        args: [--fix]
+        exclude: ^resources
 
   - repo: https://github.com/abravalheri/validate-pyproject
     rev: v0.10.1
     hooks:
       - id: validate-pyproject
+
+  - repo: local
+    hooks:
+      - id: cargo-fmt
+        name: cargo fmt
+        entry: cargo fmt --
+        language: rust
+        types: [rust]
+      - id: clippy
+        name: clippy
+        entry: cargo clippy --workspace --all-targets --all-features
+        language: rust
+        pass_filenames: false
+      - id: dev-generate-all
+        name: dev-generate-all
+        entry: cargo dev generate-all
+        language: rust
+        pass_filenames: false
+        exclude: target

BREAKING_CHANGES.md

@@ -0,0 +1,130 @@
+# Breaking Changes
+
+## 0.0.238
+
+### `select`, `extend-select`, `ignore`, and `extend-ignore` have new semantics ([#2312](https://github.com/charliermarsh/ruff/pull/2312))
+
+Previously, the interplay between `select` and its related options could lead to unexpected
+behavior. For example, `ruff --select E501 --ignore ALL` and `ruff --select E501 --extend-ignore
+ALL` behaved differently. (See [#2312](https://github.com/charliermarsh/ruff/pull/2312) for more
+examples.)
+
+When Ruff determines the enabled rule set, it has to reconcile `select` and `ignore` from a variety
+of sources, including the current `pyproject.toml`, any inherited `pyproject.toml` files, and the
+CLI.
+
+The new semantics are such that Ruff uses the "highest-priority" `select` as the basis for the rule
+set, and then applies any `extend-select`, `ignore`, and `extend-ignore` adjustments. CLI options
+are given higher priority than `pyproject.toml` options, and the current `pyproject.toml` file is
+given higher priority than any inherited `pyproject.toml` files.
+
+`extend-select` and `extend-ignore` are no longer given "top priority"; instead, they merely append
+to the `select` and `ignore` lists, as in Flake8.
+
+This change is largely backwards compatible -- most users should experience no change in behavior.
+However, as an example of a breaking change, consider the following:
+
+```toml
+[tool.ruff]
+ignore = ["F401"]
+```
+
+Running `ruff --select F` would previously have enabled all `F` rules, apart from `F401`. Now, it
+will enable all `F` rules, including `F401`, as the command line's `--select` resets the resolution.
+
+### `remove-six-compat` (`UP016`) has been removed ([#2332](https://github.com/charliermarsh/ruff/pull/2332))
+
+The `remove-six-compat` rule has been removed. This rule was only useful for one-time Python 2-to-3
+upgrades.
+
+## 0.0.237
+
+### `--explain`, `--clean`, and `--generate-shell-completion` are now subcommands ([#2190](https://github.com/charliermarsh/ruff/pull/2190))
+
+`--explain`, `--clean`, and `--generate-shell-completion` are now implemented as subcommands:
+
+    ruff .         # Still works! And will always work.
+    ruff check .   # New! Also works.
+
+    ruff --explain E402   # Still works.
+    ruff rule E402        # New! Also works. (And preferred.)
+
+    # Oops! The command has to come first.
+    ruff --format json --explain E402   # No longer works.
+    ruff --explain E402 --format json   # Still works!
+    ruff rule E402   --format json      # Works! (And preferred.)
+
+This change is largely backwards compatible -- most users should experience
+no change in behavior. However, please note the following exceptions:
+
+* Subcommands will now fail when invoked with unsupported arguments, instead
+  of silently ignoring them. For example, the following will now fail:
+
+      ruff --clean --respect-gitignore
+
+  (the `clean` command doesn't support `--respect-gitignore`.)
+
+* The semantics of `ruff <arg>` have changed slightly when `<arg>` is a valid subcommand.
+  For example, prior to this release, running `ruff rule` would run `ruff` over a file or
+  directory called `rule`. Now, `ruff rule` would invoke the `rule` subcommand. This should
+  only impact projects with files or directories named `rule`, `check`, `explain`, `clean`,
+  or `generate-shell-completion`.
+
+* Scripts that invoke ruff should supply `--` before any positional arguments.
+  (The semantics of `ruff -- <arg>` have not changed.)
+
+* `--explain` previously treated `--format grouped` as a synonym for `--format text`.
+  This is no longer supported; instead, use `--format text`.
+
+## 0.0.226
+
+### `misplaced-comparison-constant` (`PLC2201`) was deprecated in favor of `SIM300` ([#1980](https://github.com/charliermarsh/ruff/pull/1980))
+
+These two rules contain (nearly) identical logic. To deduplicate the rule set, we've upgraded
+`SIM300` to handle a few more cases, and deprecated `PLC2201` in favor of `SIM300`.
+
+## 0.0.225
+
+### `@functools.cache` rewrites have been moved to a standalone rule (`UP033`) ([#1938](https://github.com/charliermarsh/ruff/pull/1938))
+
+Previously, `UP011` handled both `@functools.lru_cache()`-to-`@functools.lru_cache` conversions,
+_and_ `@functools.lru_cache(maxsize=None)`-to-`@functools.cache` conversions. The latter has been
+moved out to its own rule (`UP033`). As such, some `# noqa: UP011` comments may need to be updated
+to reflect the change in rule code.
+
+## 0.0.222
+
+### `--max-complexity` has been removed from the CLI ([#1877](https://github.com/charliermarsh/ruff/pull/1877))
+
+The McCabe plugin's `--max-complexity` setting has been removed from the CLI, for consistency with
+the treatment of other, similar settings.
+
+To set the maximum complexity, use the `max-complexity` property in your `pyproject.toml` file,
+like so:
+
+```toml
+[tool.ruff.mccabe]
+max-complexity = 10
+```
+
+## 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.

CONTRIBUTING.md

@@ -4,10 +4,24 @@ Welcome! We're happy to have you here. Thank you in advance for your contributio
 
 ## The basics
 
-Ruff welcomes contributions in the form of Pull Requests. For small changes (e.g., bug fixes), feel
-free to submit a PR. For larger changes (e.g., new lint rules, new functionality, new configuration
-options), consider submitting an [Issue](https://github.com/charliermarsh/ruff/issues) outlining
-your proposed change.
+Ruff welcomes contributions in the form of Pull Requests.
+
+For small changes (e.g., bug fixes), feel free to submit a PR.
+
+For larger changes (e.g., new lint rules, new functionality, new configuration options), consider
+creating an [**issue**](https://github.com/charliermarsh/ruff/issues) outlining your proposed
+change. You can also join us on [**Discord**](https://discord.gg/Z8KbeK24) to discuss your idea with
+the community.
+
+If you're looking for a place to start, we recommend implementing a new lint rule (see:
+[_Adding a new lint rule_](#example-adding-a-new-lint-rule), which will allow you to learn from and
+pattern-match against the examples in the existing codebase. Many lint rules are inspired by
+existing Python plugins, which can be used as a reference implementation.
+
+As a concrete example: consider taking on one of the rules from the [`tryceratops`](https://github.com/charliermarsh/ruff/issues/2056)
+plugin, and looking to the originating [Python source](https://github.com/guilatrova/tryceratops)
+for guidance. [`flake8-simplify`](https://github.com/charliermarsh/ruff/issues/998) has a few rules
+left too.
 
 ### Prerequisites
 
@@ -28,75 +42,101 @@ After cloning the repository, run Ruff locally with:
 cargo run resources/test/fixtures --no-cache
 ```
 
-Prior to opening a pull request, ensure that your code has been auto-formatted, and that it passes
-both the lint and test validation checks:
+Prior to opening a pull request, ensure that your code has been auto-formatted,
+and that it passes both the lint and test validation checks:
 
 ```shell
-cargo +nightly fmt --all     # Auto-formatting...
-cargo +nightly clippy --all  # Linting...
-cargo +nightly test --all    # Testing...
+cargo fmt --all     # Auto-formatting...
+cargo clippy --fix --workspace --all-targets --all-features  # Linting...
+cargo test --all    # Testing...
 ```
 
 These checks will run on GitHub Actions when you open your Pull Request, but running them locally
 will save you time and expedite the merge process.
 
+Note that many code changes also require updating the snapshot tests, which is done interactively
+after running `cargo test` like so:
+
+```shell
+cargo insta review
+```
+
+If you have `pre-commit` [installed](https://pre-commit.com/#installation) then you can use it to
+assist with formatting and linting. The following command will run the `pre-commit` hooks:
+
+```shell
+pre-commit run --all-files
+```
+
 Your Pull Request will be reviewed by a maintainer, which may involve a few rounds of iteration
 prior to merging.
 
 ### Example: Adding a new lint rule
 
-There are four phases to adding a new lint rule:
+At a high level, the steps involved in adding a new lint rule are as follows:
 
-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).
-3. Add a test fixture.
-4. Update the generated files (documentation and generated code).
+1. Create a file for your rule (e.g., `src/rules/flake8_bugbear/rules/abstract_base_class.rs`).
+2. In that file, define a violation struct. You can grep for `define_violation!` to see examples.
+3. Map the violation struct to a rule code in `src/registry.rs` (e.g., `E402`).
+4. Define the logic for triggering the violation in `src/checkers/ast.rs` (for AST-based checks),
+   `src/checkers/tokens.rs` (for token-based checks), `src/checkers/lines.rs` (for text-based
+   checks), or `src/checkers/filesystem.rs` (for filesystem-based checks).
+5. Add a test fixture.
+6. Update the generated files (documentation and generated code).
 
-To define the rule, open up `src/checks.rs`. You'll need to define both a `CheckCode` and
-`CheckKind`. As an example, you can grep for `E402` and `ModuleImportNotAtTopOfFile`, and follow the
-pattern implemented therein.
+To define the violation, start by creating a dedicated file for your rule under the appropriate
+rule linter (e.g., `src/rules/flake8_bugbear/rules/abstract_base_class.rs`). That file should
+contain a struct defined via `define_violation!`, along with a function that creates the violation
+based on any required inputs. (Many of the existing examples live in `src/violations.rs`, but we're
+looking to place new rules in their own files.)
 
-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.
+To trigger the violation, you'll likely want to augment the logic in `src/checkers/ast.rs`, which
+defines the Python AST visitor, responsible for iterating over the abstract syntax tree and
+collecting diagnostics as it goes.
 
-To add a test fixture, create a file under `resources/test/fixtures`, named to match the `CheckCode`
-you defined earlier (e.g., `E402.py`). This file should contain a variety of violations and
-non-violations designed to evaluate and demonstrate the behavior of your lint rule. Run Ruff locally
-with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache`. Once you're satisfied with the
-output, codify the behavior as a snapshot test by adding a new `testcase` macro to the `mod tests`
-section of `src/linter.rs`, like so:
+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.
 
-```rust
-#[test_case(CheckCode::A001, Path::new("A001.py"); "A001")]
-...
-```
+To add a test fixture, create a file under `resources/test/fixtures/[linter]`, named to match
+the code you defined earlier (e.g., `resources/test/fixtures/pycodestyle/E402.py`). This file should
+contain a variety of violations and non-violations designed to evaluate and demonstrate the behavior
+of your lint rule.
 
-Then, run `cargo test`. Your test will fail, but you'll be prompted to follow-up with
-`cargo insta review`. Accept the generated snapshot, then commit the snapshot file alongside the
-rest of your changes.
+Run `cargo dev generate-all` to generate the code for your new fixture. Then run Ruff
+locally with (e.g.) `cargo run resources/test/fixtures/pycodestyle/E402.py --no-cache --select E402`.
 
-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.
+Once you're satisfied with the output, codify the behavior as a snapshot test by adding a new
+`test_case` macro in the relevant `src/[linter]/mod.rs` file. Then, run `cargo test --all`.
+Your test will fail, but you'll be prompted to follow-up with `cargo insta review`. Accept the
+generated snapshot, then commit the snapshot file alongside the rest of your changes.
+
+Finally, regenerate the documentation and generated code with `cargo dev generate-all`.
 
 ### Example: Adding a new configuration option
 
-Ruff's user-facing settings live in two places: first, the command-line options defined with
-[clap](https://docs.rs/clap/latest/clap/) via the `Cli` struct in `src/main.rs`; and second, the
-`Config` struct defined `src/pyproject.rs`, which is responsible for extracting user-defined
-settings from a `pyproject.toml` file.
+Ruff's user-facing settings live in a few different places.
 
-Ultimately, these two sources of configuration are merged into the `Settings` struct defined
-in `src/settings.rs`, which is then threaded through the codebase.
+First, the command-line options are defined via the `Cli` struct in `src/cli.rs`.
 
-To add a new configuration option, you'll likely want to _both_ add a CLI option to `src/main.rs`
-_and_ a `pyproject.toml` parameter to `src/pyproject.rs`. If you want to pattern-match against an
-existing example, grep for `dummy_variable_rgx`, which defines a regular expression to match against
-acceptable unused variables (e.g., `_`).
+Second, the `pyproject.toml` options are defined in `src/settings/options.rs` (via the `Options`
+struct), `src/settings/configuration.rs` (via the `Configuration` struct), and `src/settings/mod.rs`
+(via the `Settings` struct). These represent, respectively: the schema used to parse the
+`pyproject.toml` file; an internal, intermediate representation; and the final, internal
+representation used to power Ruff.
+
+To add a new configuration option, you'll likely want to modify these latter few files (along with
+`cli.rs`, if appropriate). If you want to pattern-match against an existing example, grep for
+`dummy_variable_rgx`, which defines a regular expression to match against acceptable unused
+variables (e.g., `_`).
+
+Note that plugin-specific configuration options are defined in their own modules (e.g.,
+`src/flake8_unused_arguments/settings.rs`).
+
+You may also want to add the new configuration option to the `flake8-to-ruff` tool, which is
+responsible for converting `flake8` configuration files to Ruff's TOML format. This logic
+lives in `flake8_to_ruff/src/converter.rs`.
+
+Finally, regenerate the documentation and generated code with `cargo dev generate-all`.
 
 ## Release process
 

Cargo.toml

@@ -2,70 +2,87 @@
 members = [
   "flake8_to_ruff",
   "ruff_dev",
+  "ruff_cli",
 ]
+default-members = [".", "ruff_cli"]
 
 [package]
 name = "ruff"
-version = "0.0.111"
+version = "0.0.240"
+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"]
+doctest = false
 
 [dependencies]
 anyhow = { version = "1.0.66" }
-bincode = { version = "1.3.3" }
 bitflags = { version = "1.3.2" }
-chrono = { version = "0.4.21" }
-clap = { version = "4.0.1", features = ["derive"] }
+cfg-if = { version = "1.0.0" }
+chrono = { version = "0.4.21", default-features = false, features = ["clock"] }
+clap = { version = "4.0.1", features = ["derive", "env"] }
 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" }
+imperative = { version = "1.0.3" }
 itertools = { version = "0.10.5" }
-libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "a13ec97dd4eb925bde4d426c6e422582793b260c" }
+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 = "4.0.17" }
 num-bigint = { version = "0.4.3" }
+num-traits = "0.2.15"
 once_cell = { version = "1.16.0" }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
-rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
-ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "27bf82a2251d7e6ac6cd75e6ad51be12a53d84bb" }
+ruff_macros = { version = "0.0.240", path = "ruff_macros" }
+rustc-hash = { version = "1.1.0" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "4f38cb68e4a97aeea9eb19673803a0bd5f655383" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "4f38cb68e4a97aeea9eb19673803a0bd5f655383" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "4f38cb68e4a97aeea9eb19673803a0bd5f655383" }
+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" }
+smallvec = { version = "1.10.0" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
 textwrap = { version = "0.16.0" }
+thiserror = { version = "1.0" }
 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]
-cacache = { version = "10.0.1" } # uses async-std
-clearscreen = { version = "1.0.10" } # uses which
+toml = { version = "0.6.0" }
 
 # 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" }
+
+[target.'cfg(not(target_family = "wasm"))'.dependencies]
+is_executable = "1.0.1"
 
 [dev-dependencies]
-assert_cmd = { version = "2.0.4" }
-criterion = { version = "0.4.0" }
-insta = { version = "1.19.1", features = ["yaml"] }
+insta = { version = "1.19.0", features = ["yaml", "redactions"] }
 test-case = { version = "2.2.2" }
+wasm-bindgen-test = { version = "0.3.33" }
 
-[features]
-default = ["update-informer"]
-update-informer = ["dep:update-informer"]
+[target.'cfg(not(target_family = "wasm"))'.dev-dependencies]
+criterion = { version = "0.4.0" }
 
 [profile.release]
 panic = "abort"
@@ -79,6 +96,7 @@ opt-level = 3
 [profile.dev.package.similar]
 opt-level = 3
 
-[[bench]]
-name = "source_code_locator"
-harness = false
+# 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

assets/badge/v0.json

@@ -0,0 +1,8 @@
+{
+  "label": "",
+  "message": "Ruff",
+  "logoSvg": "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"128\" height=\"128\"><path d=\"M115.36 61.84 70.22 50.49 114.45 2.4a1.222 1.222 0 0 0-1.54-1.87L12.3 61.98c-.41.25-.64.72-.57 1.2.06.48.4.87.87 1.01l45.07 13.25-44.29 48.16c-.42.46-.44 1.15-.04 1.61.24.29.58.44.94.44.22 0 .45-.06.65-.19l100.78-63.41c.42-.26.64-.75.56-1.22-.08-.49-.43-.88-.91-.99z\" style=\"fill:#fcc21b\"/></svg>",
+  "logoWidth": 10,
+  "labelColor": "grey",
+  "color": "#E15759"
+}

assets/badge/v1.json

@@ -0,0 +1,8 @@
+{
+  "label": "",
+  "message": "Ruff",
+  "logoSvg": "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"109\" height=\"132\" fill=\"none\"><g filter=\"url(#a)\"><path fill=\"#FCC21B\" d=\"m103.642 61.492-45.14-11.35 44.23-48.09a1.222 1.222 0 0 0-1.54-1.87L.582 61.632c-.41.25-.64.72-.57 1.2.06.48.4.87.87 1.01l45.07 13.25-44.29 48.16c-.42.46-.44 1.15-.04 1.61.24.29.58.44.94.44.22 0 .45-.06.65-.19l100.78-63.41c.42-.26.64-.75.56-1.22-.08-.49-.43-.88-.91-.99Z\"/></g><defs><filter id=\"a\" width=\"108.569\" height=\"131.302\" x=\"0\" y=\"0\" color-interpolation-filters=\"sRGB\" filterUnits=\"userSpaceOnUse\"><feFlood flood-opacity=\"0\" result=\"BackgroundImageFix\"/><feColorMatrix in=\"SourceAlpha\" result=\"hardAlpha\" values=\"0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0\"/><feOffset dx=\"4\" dy=\"4\"/><feComposite in2=\"hardAlpha\" operator=\"out\"/><feColorMatrix values=\"0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0\"/><feBlend in2=\"BackgroundImageFix\" result=\"effect1_dropShadow_7_4\"/><feBlend in=\"SourceGraphic\" in2=\"effect1_dropShadow_7_4\" result=\"shape\"/></filter></defs></svg>",
+  "logoWidth": 10,
+  "labelColor": "grey",
+  "color": "#E15759"
+}

benches/source_code_locator.rs

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

flake8_to_ruff/Cargo.toml

@@ -1,21 +1,22 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.111-dev.0"
+version = "0.0.240"
 edition = "2021"
 
-[lib]
-name = "flake8_to_ruff"
-
 [dependencies]
 anyhow = { version = "1.0.66" }
 clap = { version = "4.0.1", features = ["derive"] }
+colored = { version = "2.0.0" }
 configparser = { version = "3.0.2" }
 once_cell = { version = "1.16.0" }
 regex = { version = "1.6.0" }
 ruff = { path = "..", default-features = false }
+rustc-hash = { version = "1.1.0" }
 serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.87" }
-toml = { version = "0.5.9" }
+strum = { version = "0.24.1", features = ["strum_macros"] }
+strum_macros = { version = "0.24.3" }
+toml = { version = "0.6.0" }
 
 [dev-dependencies]
 

flake8_to_ruff/README.md

@@ -84,7 +84,7 @@ flake8-to-ruff path/to/.flake8 --plugin flake8-builtins --plugin flake8-quotes
 1. Ruff only supports a subset of the Flake configuration options. `flake8-to-ruff` will warn on and
    ignore unsupported options in the `.flake8` file (or equivalent). (Similarly, Ruff has a few
    configuration options that don't exist in Flake8.)
-2. Ruff will omit any error codes that are unimplemented or unsupported by Ruff, including error
+2. Ruff will omit any rule codes that are unimplemented or unsupported by Ruff, including rule
    codes from unsupported plugins. (See the [Ruff README](https://github.com/charliermarsh/ruff#user-content-how-does-ruff-compare-to-flake8)
    for the complete list of supported plugins.)
 

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",
+]

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

flake8_to_ruff/examples/jupyterhub.ini

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

flake8_to_ruff/examples/manim.ini

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

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",
@@ -25,7 +26,7 @@ requires-python = ">=3.7"
 repository = "https://github.com/charliermarsh/ruff#subdirectory=crates/flake8_to_ruff"
 
 [build-system]
-requires = ["maturin>=0.13,<0.14"]
+requires = ["maturin>=0.14,<0.15"]
 build-backend = "maturin"
 
 [tool.maturin]

flake8_to_ruff/src/converter.rs

@@ -1,482 +0,0 @@
-use std::collections::{BTreeSet, HashMap};
-
-use anyhow::Result;
-use ruff::checks_gen::CheckCodePrefix;
-use ruff::flake8_quotes::settings::Quote;
-use ruff::settings::options::Options;
-use ruff::settings::pyproject::Pyproject;
-use ruff::{flake8_annotations, flake8_quotes, pep8_naming};
-
-use crate::plugin::Plugin;
-use crate::{parser, plugin};
-
-pub fn convert(
-    flake8: &HashMap<String, Option<String>>,
-    plugins: Option<Vec<Plugin>>,
-) -> Result<Pyproject> {
-    // Extract all referenced check code prefixes, to power plugin inference.
-    let mut referenced_codes: BTreeSet<CheckCodePrefix> = Default::default();
-    for (key, value) in flake8 {
-        if let Some(value) = value {
-            match key.as_str() {
-                "select" | "ignore" | "extend-select" | "extend_select" | "extend-ignore"
-                | "extend_ignore" => {
-                    referenced_codes.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "per-file-ignores" | "per_file_ignores" => {
-                    if let Ok(per_file_ignores) =
-                        parser::parse_files_to_codes_mapping(value.as_ref())
-                    {
-                        for (_, codes) in parser::collect_per_file_ignores(per_file_ignores) {
-                            referenced_codes.extend(codes);
-                        }
-                    }
-                }
-                _ => {}
-            }
-        }
-    }
-
-    // Check if the user has specified a `select`. If not, we'll add our own
-    // default `select`, and populate it based on user plugins.
-    let mut select = flake8
-        .get("select")
-        .and_then(|value| {
-            value
-                .as_ref()
-                .map(|value| BTreeSet::from_iter(parser::parse_prefix_codes(value)))
-        })
-        .unwrap_or_else(|| {
-            plugin::resolve_select(
-                flake8,
-                &plugins.unwrap_or_else(|| {
-                    plugin::infer_plugins_from_options(flake8)
-                        .into_iter()
-                        .chain(plugin::infer_plugins_from_codes(&referenced_codes))
-                        .collect()
-                }),
-            )
-        });
-    let mut ignore = flake8
-        .get("ignore")
-        .and_then(|value| {
-            value
-                .as_ref()
-                .map(|value| BTreeSet::from_iter(parser::parse_prefix_codes(value)))
-        })
-        .unwrap_or_default();
-
-    // Parse each supported option.
-    let mut options: Options = Default::default();
-    let mut flake8_annotations: flake8_annotations::settings::Options = Default::default();
-    let mut flake8_quotes: flake8_quotes::settings::Options = Default::default();
-    let mut pep8_naming: pep8_naming::settings::Options = Default::default();
-    for (key, value) in flake8 {
-        if let Some(value) = value {
-            match key.as_str() {
-                // flake8
-                "max-line-length" | "max_line_length" => match value.clone().parse::<usize>() {
-                    Ok(line_length) => options.line_length = Some(line_length),
-                    Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                },
-                "select" => {
-                    // No-op (handled above).
-                    select.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "ignore" => {
-                    // No-op (handled above).
-                }
-                "extend-select" | "extend_select" => {
-                    // Unlike Flake8, use a single explicit `select`.
-                    select.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "extend-ignore" | "extend_ignore" => {
-                    // Unlike Flake8, use a single explicit `ignore`.
-                    ignore.extend(parser::parse_prefix_codes(value.as_ref()));
-                }
-                "exclude" => {
-                    options.exclude = Some(parser::parse_strings(value.as_ref()));
-                }
-                "extend-exclude" | "extend_exclude" => {
-                    options.extend_exclude = Some(parser::parse_strings(value.as_ref()));
-                }
-                "per-file-ignores" | "per_file_ignores" => {
-                    match parser::parse_files_to_codes_mapping(value.as_ref()) {
-                        Ok(per_file_ignores) => {
-                            options.per_file_ignores =
-                                Some(parser::collect_per_file_ignores(per_file_ignores))
-                        }
-                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                    }
-                }
-                // flake8-annotations
-                "suppress-none-returning" | "suppress_none_returning" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.suppress_none_returning = Some(bool),
-                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                    }
-                }
-                "suppress-dummy-args" | "suppress_dummy_args" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.suppress_dummy_args = Some(bool),
-                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                    }
-                }
-                "mypy-init-return" | "mypy_init_return" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.mypy_init_return = Some(bool),
-                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                    }
-                }
-                "allow-star-arg-any" | "allow_star_arg_any" => {
-                    match parser::parse_bool(value.as_ref()) {
-                        Ok(bool) => flake8_annotations.allow_star_arg_any = Some(bool),
-                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                    }
-                }
-                // flake8-quotes
-                "quotes" | "inline-quotes" | "inline_quotes" => match value.trim() {
-                    "'" | "single" => flake8_quotes.inline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Single),
-                    _ => eprintln!("Unexpected '{key}' value: {value}"),
-                },
-                "multiline-quotes" | "multiline_quotes" => match value.trim() {
-                    "'" | "single" => flake8_quotes.multiline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Single),
-                    _ => eprintln!("Unexpected '{key}' value: {value}"),
-                },
-                "docstring-quotes" | "docstring_quotes" => match value.trim() {
-                    "'" | "single" => flake8_quotes.docstring_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Single),
-                    _ => eprintln!("Unexpected '{key}' value: {value}"),
-                },
-                "avoid-escape" | "avoid_escape" => match parser::parse_bool(value.as_ref()) {
-                    Ok(bool) => flake8_quotes.avoid_escape = Some(bool),
-                    Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
-                },
-                // pep8-naming
-                "ignore-names" | "ignore_names" => {
-                    pep8_naming.ignore_names = Some(parser::parse_strings(value.as_ref()));
-                }
-                "classmethod-decorators" | "classmethod_decorators" => {
-                    pep8_naming.classmethod_decorators =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                "staticmethod-decorators" | "staticmethod_decorators" => {
-                    pep8_naming.staticmethod_decorators =
-                        Some(parser::parse_strings(value.as_ref()));
-                }
-                // flake8-docstrings
-                "docstring-convention" => {
-                    // No-op (handled above).
-                }
-                // Unknown
-                _ => eprintln!("Skipping unsupported property: {key}"),
-            }
-        }
-    }
-
-    // Deduplicate and sort.
-    options.select = Some(Vec::from_iter(select));
-    options.ignore = Some(Vec::from_iter(ignore));
-    if flake8_quotes != Default::default() {
-        options.flake8_quotes = Some(flake8_quotes);
-    }
-    if pep8_naming != Default::default() {
-        options.pep8_naming = Some(pep8_naming);
-    }
-
-    // Create the pyproject.toml.
-    Ok(Pyproject::new(options))
-}
-
-#[cfg(test)]
-mod tests {
-    use std::collections::HashMap;
-
-    use anyhow::Result;
-    use ruff::checks_gen::CheckCodePrefix;
-    use ruff::flake8_quotes;
-    use ruff::settings::options::Options;
-    use ruff::settings::pyproject::Pyproject;
-
-    use crate::converter::convert;
-    use crate::plugin::Plugin;
-
-    #[test]
-    fn it_converts_empty() -> Result<()> {
-        let actual = convert(&HashMap::from([]), None)?;
-        let expected = Pyproject::new(Options {
-            line_length: None,
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: None,
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-
-    #[test]
-    fn it_converts_dashes() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
-            Some(vec![]),
-        )?;
-        let expected = Pyproject::new(Options {
-            line_length: Some(100),
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: None,
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-
-    #[test]
-    fn it_converts_underscores() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
-            Some(vec![]),
-        )?;
-        let expected = Pyproject::new(Options {
-            line_length: Some(100),
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: None,
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-
-    #[test]
-    fn it_ignores_parse_errors() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
-            Some(vec![]),
-        )?;
-        let expected = Pyproject::new(Options {
-            line_length: None,
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: None,
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-
-    #[test]
-    fn it_converts_plugin_options() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
-            Some(vec![]),
-        )?;
-        let expected = Pyproject::new(Options {
-            line_length: None,
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: Some(flake8_quotes::settings::Options {
-                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
-                multiline_quotes: None,
-                docstring_quotes: None,
-                avoid_escape: None,
-            }),
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-
-    #[test]
-    fn it_converts_docstring_conventions() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([(
-                "docstring-convention".to_string(),
-                Some("numpy".to_string()),
-            )]),
-            Some(vec![Plugin::Flake8Docstrings]),
-        )?;
-        let expected = Pyproject::new(Options {
-            line_length: None,
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                CheckCodePrefix::D214,
-                CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D400,
-                CheckCodePrefix::D403,
-                CheckCodePrefix::D404,
-                CheckCodePrefix::D405,
-                CheckCodePrefix::D406,
-                CheckCodePrefix::D407,
-                CheckCodePrefix::D408,
-                CheckCodePrefix::D409,
-                CheckCodePrefix::D410,
-                CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                CheckCodePrefix::D414,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: None,
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-
-    #[test]
-    fn it_infers_plugins_if_omitted() -> Result<()> {
-        let actual = convert(
-            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
-            None,
-        )?;
-        let expected = Pyproject::new(Options {
-            line_length: None,
-            src: None,
-            fix: None,
-            exclude: None,
-            extend_exclude: None,
-            select: Some(vec![
-                CheckCodePrefix::E,
-                CheckCodePrefix::F,
-                CheckCodePrefix::Q,
-                CheckCodePrefix::W,
-            ]),
-            extend_select: None,
-            ignore: Some(vec![]),
-            extend_ignore: None,
-            per_file_ignores: None,
-            dummy_variable_rgx: None,
-            target_version: None,
-            flake8_annotations: None,
-            flake8_quotes: Some(flake8_quotes::settings::Options {
-                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
-                multiline_quotes: None,
-                docstring_quotes: None,
-                avoid_escape: None,
-            }),
-            isort: None,
-            pep8_naming: None,
-        });
-        assert_eq!(actual, expected);
-
-        Ok(())
-    }
-}

flake8_to_ruff/src/lib.rs

@@ -1,5 +0,0 @@
-#![allow(clippy::collapsible_if, clippy::collapsible_else_if)]
-
-pub mod converter;
-mod parser;
-pub mod plugin;

flake8_to_ruff/src/main.rs

@@ -1,43 +1,66 @@
-//! Utility to generate Ruff's pyproject.toml section from a Flake8 INI file.
+//! Utility to generate Ruff's `pyproject.toml` section from a Flake8 INI file.
+#![forbid(unsafe_code)]
+#![warn(clippy::pedantic)]
+#![allow(
+    clippy::collapsible_else_if,
+    clippy::collapsible_if,
+    clippy::implicit_hasher,
+    clippy::match_same_arms,
+    clippy::missing_errors_doc,
+    clippy::missing_panics_doc,
+    clippy::module_name_repetitions,
+    clippy::must_use_candidate,
+    clippy::similar_names,
+    clippy::too_many_lines
+)]
 
 use std::path::PathBuf;
 
 use anyhow::Result;
 use clap::Parser;
 use configparser::ini::Ini;
-use flake8_to_ruff::converter;
-use flake8_to_ruff::plugin::Plugin;
+use ruff::flake8_to_ruff::{self, ExternalConfig};
 
 #[derive(Parser)]
 #[command(
     about = "Convert existing Flake8 configuration to Ruff.",
     long_about = None
 )]
-struct Cli {
-    /// Path to the Flake8 configuration file (e.g., 'setup.cfg', 'tox.ini', or
-    /// '.flake8').
+struct Args {
+    /// Path to the Flake8 configuration file (e.g., `setup.cfg`, `tox.ini`, or
+    /// `.flake8`).
     #[arg(required = true)]
     file: PathBuf,
+    /// Optional path to a `pyproject.toml` file, used to ensure compatibility
+    /// with Black.
+    #[arg(long)]
+    pyproject: Option<PathBuf>,
     /// List of plugins to enable.
     #[arg(long, value_delimiter = ',')]
-    plugin: Option<Vec<Plugin>>,
+    plugin: Option<Vec<flake8_to_ruff::Plugin>>,
 }
 
 fn main() -> Result<()> {
-    let cli = Cli::parse();
+    let args = Args::parse();
 
     // Read the INI file.
     let mut ini = Ini::new_cs();
     ini.set_multiline(true);
-    let config = ini.load(cli.file).map_err(|msg| anyhow::anyhow!(msg))?;
+    let config = ini.load(args.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 pyproject = args.pyproject.map(flake8_to_ruff::parse).transpose()?;
+    let external_config = pyproject
+        .as_ref()
+        .and_then(|pyproject| pyproject.tool.as_ref())
+        .map(|tool| ExternalConfig {
+            black: tool.black.as_ref(),
+            isort: tool.isort.as_ref(),
+        })
+        .unwrap_or_default();
 
-    // Create the pyproject.toml.
-    let pyproject = converter::convert(flake8, cli.plugin)?;
+    // Create Ruff's pyproject.toml section.
+    let pyproject = flake8_to_ruff::convert(&config, &external_config, args.plugin)?;
     println!("{}", toml::to_string_pretty(&pyproject)?);
 
     Ok(())

flake8_to_ruff/src/plugin.rs

@@ -1,396 +0,0 @@
-use std::collections::{BTreeSet, HashMap};
-use std::str::FromStr;
-
-use anyhow::anyhow;
-use ruff::checks_gen::CheckCodePrefix;
-
-#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
-pub enum Plugin {
-    Flake8Bugbear,
-    Flake8Builtins,
-    Flake8Comprehensions,
-    Flake8Docstrings,
-    Flake8Print,
-    Flake8Quotes,
-    Flake8Annotations,
-    PEP8Naming,
-    Pyupgrade,
-}
-
-impl FromStr for Plugin {
-    type Err = anyhow::Error;
-
-    fn from_str(string: &str) -> Result<Self, Self::Err> {
-        match string {
-            "flake8-bugbear" => Ok(Plugin::Flake8Bugbear),
-            "flake8-builtins" => Ok(Plugin::Flake8Builtins),
-            "flake8-comprehensions" => Ok(Plugin::Flake8Comprehensions),
-            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
-            "flake8-print" => Ok(Plugin::Flake8Print),
-            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
-            "flake8-annotations" => Ok(Plugin::Flake8Annotations),
-            "pep8-naming" => Ok(Plugin::PEP8Naming),
-            "pyupgrade" => Ok(Plugin::Pyupgrade),
-            _ => Err(anyhow!("Unknown plugin: {}", string)),
-        }
-    }
-}
-
-impl Plugin {
-    pub fn default(&self) -> CheckCodePrefix {
-        match self {
-            Plugin::Flake8Bugbear => CheckCodePrefix::B,
-            Plugin::Flake8Builtins => CheckCodePrefix::A,
-            Plugin::Flake8Comprehensions => CheckCodePrefix::C,
-            Plugin::Flake8Docstrings => CheckCodePrefix::D,
-            Plugin::Flake8Print => CheckCodePrefix::T,
-            Plugin::Flake8Quotes => CheckCodePrefix::Q,
-            Plugin::Flake8Annotations => CheckCodePrefix::ANN,
-            Plugin::PEP8Naming => CheckCodePrefix::N,
-            Plugin::Pyupgrade => CheckCodePrefix::U,
-        }
-    }
-
-    pub fn select(&self, flake8: &HashMap<String, Option<String>>) -> Vec<CheckCodePrefix> {
-        match self {
-            Plugin::Flake8Bugbear => vec![CheckCodePrefix::B],
-            Plugin::Flake8Builtins => vec![CheckCodePrefix::A],
-            Plugin::Flake8Comprehensions => vec![CheckCodePrefix::C],
-            Plugin::Flake8Docstrings => {
-                // Use the user-provided docstring.
-                for key in ["docstring-convention", "docstring_convention"] {
-                    if let Some(Some(value)) = flake8.get(key) {
-                        match DocstringConvention::from_str(value) {
-                            Ok(convention) => return convention.select(),
-                            Err(e) => {
-                                eprintln!("Unexpected '{key}' value: {value} ({e}");
-                                return vec![];
-                            }
-                        }
-                    }
-                }
-                // Default to PEP8.
-                DocstringConvention::PEP8.select()
-            }
-            Plugin::Flake8Print => vec![CheckCodePrefix::T],
-            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
-            Plugin::Flake8Annotations => vec![CheckCodePrefix::ANN],
-            Plugin::PEP8Naming => vec![CheckCodePrefix::N],
-            Plugin::Pyupgrade => vec![CheckCodePrefix::U],
-        }
-    }
-}
-
-pub enum DocstringConvention {
-    All,
-    PEP8,
-    NumPy,
-    Google,
-}
-
-impl FromStr for DocstringConvention {
-    type Err = anyhow::Error;
-
-    fn from_str(string: &str) -> Result<Self, Self::Err> {
-        match string {
-            "all" => Ok(DocstringConvention::All),
-            "pep8" => Ok(DocstringConvention::PEP8),
-            "numpy" => Ok(DocstringConvention::NumPy),
-            "google" => Ok(DocstringConvention::Google),
-            _ => Err(anyhow!("Unknown docstring convention: {}", string)),
-        }
-    }
-}
-
-impl DocstringConvention {
-    fn select(&self) -> Vec<CheckCodePrefix> {
-        match self {
-            DocstringConvention::All => vec![CheckCodePrefix::D],
-            DocstringConvention::PEP8 => vec![
-                // All errors except D203, D212, D213, D214, D215, D404, D405, D406, D407, D408,
-                // D409, D410, D411, D413, D415, D416 and D417.
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                CheckCodePrefix::D107,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                // CheckCodePrefix::D203,
-                CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                // CheckCodePrefix::D212,
-                // CheckCodePrefix::D213,
-                // CheckCodePrefix::D214,
-                // CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D400,
-                CheckCodePrefix::D402,
-                CheckCodePrefix::D403,
-                // CheckCodePrefix::D404,
-                // CheckCodePrefix::D405,
-                // CheckCodePrefix::D406,
-                // CheckCodePrefix::D407,
-                // CheckCodePrefix::D408,
-                // CheckCodePrefix::D409,
-                // CheckCodePrefix::D410,
-                // CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                // CheckCodePrefix::D413,
-                CheckCodePrefix::D414,
-                // CheckCodePrefix::D415,
-                // CheckCodePrefix::D416,
-                // CheckCodePrefix::D417,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
-            ],
-            DocstringConvention::NumPy => vec![
-                // All errors except D107, D203, D212, D213, D402, D413, D415, D416, and D417.
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                // CheckCodePrefix::D107,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                // CheckCodePrefix::D203,
-                CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                // CheckCodePrefix::D212,
-                // CheckCodePrefix::D213,
-                CheckCodePrefix::D214,
-                CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D400,
-                // CheckCodePrefix::D402,
-                CheckCodePrefix::D403,
-                CheckCodePrefix::D404,
-                CheckCodePrefix::D405,
-                CheckCodePrefix::D406,
-                CheckCodePrefix::D407,
-                CheckCodePrefix::D408,
-                CheckCodePrefix::D409,
-                CheckCodePrefix::D410,
-                CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                // CheckCodePrefix::D413,
-                CheckCodePrefix::D414,
-                // CheckCodePrefix::D415,
-                // CheckCodePrefix::D416,
-                // CheckCodePrefix::D417,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
-            ],
-            DocstringConvention::Google => vec![
-                // All errors except D203, D204, D213, D215, D400, D401, D404, D406, D407, D408,
-                // D409 and D413.
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                CheckCodePrefix::D107,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                // CheckCodePrefix::D203,
-                // CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                CheckCodePrefix::D212,
-                // CheckCodePrefix::D213,
-                CheckCodePrefix::D214,
-                // CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                // CheckCodePrefix::D400,
-                CheckCodePrefix::D402,
-                CheckCodePrefix::D403,
-                // CheckCodePrefix::D404,
-                CheckCodePrefix::D405,
-                // CheckCodePrefix::D406,
-                // CheckCodePrefix::D407,
-                // CheckCodePrefix::D408,
-                // CheckCodePrefix::D409,
-                CheckCodePrefix::D410,
-                CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                // CheckCodePrefix::D413,
-                CheckCodePrefix::D414,
-                CheckCodePrefix::D415,
-                CheckCodePrefix::D416,
-                CheckCodePrefix::D417,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
-            ],
-        }
-    }
-}
-
-/// Infer the enabled plugins based on user-provided options.
-///
-/// For example, if the user specified a `mypy-init-return` setting, we should
-/// infer that `flake8-annotations` is active.
-pub fn infer_plugins_from_options(flake8: &HashMap<String, Option<String>>) -> Vec<Plugin> {
-    let mut plugins = BTreeSet::new();
-    for key in flake8.keys() {
-        match key.as_str() {
-            // flake8-docstrings
-            "docstring-convention" | "docstring_convention" => {
-                plugins.insert(Plugin::Flake8Docstrings);
-            }
-            // flake8-builtins
-            "builtins-ignorelist" | "builtins_ignorelist" => {
-                plugins.insert(Plugin::Flake8Builtins);
-            }
-            // flake8-quotes
-            "quotes" | "inline-quotes" | "inline_quotes" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            "multiline-quotes" | "multiline_quotes" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            "docstring-quotes" | "docstring_quotes" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            "avoid-escape" | "avoid_escape" => {
-                plugins.insert(Plugin::Flake8Quotes);
-            }
-            // flake8-annotations
-            "suppress-none-returning" | "suppress_none_returning" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "suppress-dummy-args" | "suppress_dummy_args" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "allow-untyped-defs" | "allow_untyped_defs" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "allow-untyped-nested" | "allow_untyped_nested" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "mypy-init-return" | "mypy_init_return" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "dispatch-decorators" | "dispatch_decorators" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "overload-decorators" | "overload_decorators" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            "allow-star-arg-any" | "allow_star_arg_any" => {
-                plugins.insert(Plugin::Flake8Annotations);
-            }
-            // pep8-naming
-            "ignore-names" | "ignore_names" => {
-                plugins.insert(Plugin::PEP8Naming);
-            }
-            "classmethod-decorators" | "classmethod_decorators" => {
-                plugins.insert(Plugin::PEP8Naming);
-            }
-            "staticmethod-decorators" | "staticmethod_decorators" => {
-                plugins.insert(Plugin::PEP8Naming);
-            }
-            _ => {}
-        }
-    }
-    Vec::from_iter(plugins)
-}
-
-/// Infer the enabled plugins based on the referenced prefixes.
-///
-/// For example, if the user ignores `ANN101`, we should infer that
-/// `flake8-annotations` is active.
-pub fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin> {
-    [
-        Plugin::Flake8Bugbear,
-        Plugin::Flake8Builtins,
-        Plugin::Flake8Comprehensions,
-        Plugin::Flake8Docstrings,
-        Plugin::Flake8Print,
-        Plugin::Flake8Quotes,
-        Plugin::Flake8Annotations,
-        Plugin::PEP8Naming,
-        Plugin::Pyupgrade,
-    ]
-    .into_iter()
-    .filter(|plugin| {
-        for prefix in codes {
-            if prefix
-                .codes()
-                .iter()
-                .any(|code| plugin.default().codes().contains(code))
-            {
-                return true;
-            }
-        }
-        false
-    })
-    .collect()
-}
-
-/// Resolve the set of enabled `CheckCodePrefix` values for the given plugins.
-pub fn resolve_select(
-    flake8: &HashMap<String, Option<String>>,
-    plugins: &[Plugin],
-) -> BTreeSet<CheckCodePrefix> {
-    // Include default Pyflakes and pycodestyle checks.
-    let mut select = BTreeSet::from([CheckCodePrefix::E, CheckCodePrefix::F, CheckCodePrefix::W]);
-
-    // Add prefix codes for every plugin.
-    for plugin in plugins {
-        select.extend(plugin.select(flake8));
-    }
-
-    select
-}
-
-#[cfg(test)]
-mod tests {
-    use std::collections::HashMap;
-
-    use crate::plugin::{infer_plugins_from_options, Plugin};
-
-    #[test]
-    fn it_infers_plugins() {
-        let actual = infer_plugins_from_options(&HashMap::from([(
-            "inline-quotes".to_string(),
-            Some("single".to_string()),
-        )]));
-        let expected = vec![Plugin::Flake8Quotes];
-        assert_eq!(actual, expected);
-
-        let actual = infer_plugins_from_options(&HashMap::from([(
-            "staticmethod-decorators".to_string(),
-            Some("[]".to_string()),
-        )]));
-        let expected = vec![Plugin::PEP8Naming];
-        assert_eq!(actual, expected);
-    }
-}

mkdocs.template.yml

@@ -0,0 +1,50 @@
+site_name: Ruff
+theme:
+  name: material
+  features:
+    - navigation.instant
+    - navigation.tracking
+    - content.code.annotate
+    - toc.integrate
+    - toc.follow
+    - navigation.path
+    - navigation.top
+    - content.code.copy
+  palette:
+    - media: "(prefers-color-scheme: light)"
+      scheme: default
+      primary: red
+      toggle:
+        icon: material/weather-sunny
+        name: Switch to dark mode
+    - media: "(prefers-color-scheme: dark)"
+      scheme: slate
+      primary: red
+      toggle:
+        icon: material/weather-night
+        name: Switch to light mode
+  custom_dir: .overrides
+repo_url: https://github.com/charliermarsh/ruff
+repo_name: ruff
+site_author: charliermarsh
+site_url: https://beta.ruff.rs/docs/
+site_dir: site/docs
+markdown_extensions:
+  - toc:
+      permalink: "#"
+  - pymdownx.snippets:
+  - pymdownx.magiclink:
+  - attr_list:
+  - md_in_html:
+  - pymdownx.highlight:
+      anchor_linenums: true
+  - pymdownx.inlinehilite:
+  - pymdownx.superfences:
+  - markdown.extensions.attr_list:
+  - pymdownx.keys:
+  - pymdownx.tasklist:
+      custom_checkbox: true
+  - pymdownx.highlight:
+      anchor_linenums: true
+plugins:
+  - search

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"
+    }
+  }
+}

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.*

playground/.prettierrc.json

@@ -0,0 +1,3 @@
+{
+  "trailingComma": "all"
+}

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).

playground/index.html

@@ -0,0 +1,23 @@
+<!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" />
+    <script src="https://cdn.usefathom.com/script.js" data-site="XWUDIXNB" defer></script>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

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"
+  }
+}

playground/postcss.config.cjs

@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};

playground/src/Editor/Editor.tsx

@@ -0,0 +1,156 @@
+import { useCallback, useEffect, useState } from "react";
+import { DEFAULT_PYTHON_SOURCE } from "../constants";
+import init, {
+  check,
+  Diagnostic,
+  currentVersion,
+  defaultSettings,
+} from "../pkg";
+import { ErrorMessage } from "./ErrorMessage";
+import Header from "./Header";
+import { useTheme } from "./theme";
+import { persist, restore, stringify } from "./settings";
+import SettingsEditor from "./SettingsEditor";
+import SourceEditor from "./SourceEditor";
+import MonacoThemes from "./MonacoThemes";
+
+type Tab = "Source" | "Settings";
+
+export default function Editor() {
+  const [initialized, setInitialized] = useState<boolean>(false);
+  const [version, setVersion] = useState<string | null>(null);
+  const [tab, setTab] = useState<Tab>("Source");
+  const [edit, setEdit] = useState<number>(0);
+  const [settingsSource, setSettingsSource] = useState<string | null>(null);
+  const [pythonSource, setPythonSource] = useState<string | null>(null);
+  const [diagnostics, setDiagnostics] = useState<Diagnostic[]>([]);
+  const [error, setError] = useState<string | null>(null);
+  const [theme, setTheme] = useTheme();
+
+  useEffect(() => {
+    init().then(() => setInitialized(true));
+  }, []);
+
+  useEffect(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    let config: any;
+    let diagnostics: Diagnostic[];
+
+    try {
+      config = JSON.parse(settingsSource);
+    } catch (e) {
+      setDiagnostics([]);
+      setError((e as Error).message);
+      return;
+    }
+
+    try {
+      diagnostics = check(pythonSource, config);
+    } catch (e) {
+      setError(e as string);
+      return;
+    }
+
+    setError(null);
+    setDiagnostics(diagnostics);
+  }, [initialized, settingsSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    if (settingsSource == null || pythonSource == null) {
+      const payload = restore();
+      if (payload) {
+        const [settingsSource, pythonSource] = payload;
+        setSettingsSource(settingsSource);
+        setPythonSource(pythonSource);
+      } else {
+        setSettingsSource(stringify(defaultSettings()));
+        setPythonSource(DEFAULT_PYTHON_SOURCE);
+      }
+    }
+  }, [initialized, settingsSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    setVersion(currentVersion());
+  }, [initialized]);
+
+  const handleShare = useCallback(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    persist(settingsSource, pythonSource);
+  }, [initialized, settingsSource, pythonSource]);
+
+  const handlePythonSourceChange = useCallback((pythonSource: string) => {
+    setEdit((edit) => edit + 1);
+    setPythonSource(pythonSource);
+  }, []);
+
+  const handleSettingsSourceChange = useCallback((settingsSource: string) => {
+    setEdit((edit) => edit + 1);
+    setSettingsSource(settingsSource);
+  }, []);
+
+  return (
+    <main
+      className={
+        "h-full w-full flex flex-auto bg-ayu-background dark:bg-ayu-background-dark"
+      }
+    >
+      <Header
+        edit={edit}
+        tab={tab}
+        theme={theme}
+        version={version}
+        onChangeTab={setTab}
+        onChangeTheme={setTheme}
+        onShare={initialized ? handleShare : undefined}
+      />
+
+      <MonacoThemes />
+
+      <div className={"mt-12 relative flex-auto"}>
+        {initialized && settingsSource != null && pythonSource != null ? (
+          <>
+            <SourceEditor
+              visible={tab === "Source"}
+              source={pythonSource}
+              theme={theme}
+              diagnostics={diagnostics}
+              onChange={handlePythonSourceChange}
+            />
+            <SettingsEditor
+              visible={tab === "Settings"}
+              source={settingsSource}
+              theme={theme}
+              onChange={handleSettingsSourceChange}
+            />
+          </>
+        ) : null}
+      </div>
+      {error && tab === "Source" ? (
+        <div
+          style={{
+            position: "fixed",
+            left: "10%",
+            right: "10%",
+            bottom: "10%",
+          }}
+        >
+          <ErrorMessage>{error}</ErrorMessage>
+        </div>
+      ) : null}
+    </main>
+  );
+}

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>
+  );
+}

playground/src/Editor/Header.tsx

@@ -0,0 +1,105 @@
+import classNames from "classnames";
+import RepoButton from "./RepoButton";
+import ThemeButton from "./ThemeButton";
+import ShareButton from "./ShareButton";
+import { Theme } from "./theme";
+import VersionTag from "./VersionTag";
+
+export type Tab = "Source" | "Settings";
+
+export default function Header({
+  edit,
+  tab,
+  theme,
+  version,
+  onChangeTab,
+  onChangeTheme,
+  onShare,
+}: {
+  edit: number;
+  tab: Tab;
+  theme: Theme;
+  version: string | null;
+  onChangeTab: (tab: Tab) => void;
+  onChangeTheme: (theme: Theme) => void;
+  onShare?: () => void;
+}) {
+  return (
+    <div
+      className={classNames(
+        "w-full",
+        "flex",
+        "items-center",
+        "justify-between",
+        "flex-none",
+        "pl-5",
+        "sm:pl-6",
+        "pr-4",
+        "lg:pr-6",
+        "absolute",
+        "z-10",
+        "top-0",
+        "left-0",
+        "-mb-px",
+        "antialiased",
+        "border-b",
+        "border-gray-200",
+        "dark:border-gray-800",
+      )}
+    >
+      <div className="flex space-x-5">
+        <button
+          type="button"
+          className={classNames(
+            "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
+            tab === "Source"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
+          )}
+          onClick={() => onChangeTab("Source")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Source" ? "opacity-100" : "opacity-0",
+            )}
+          />
+          Source
+        </button>
+        <button
+          type="button"
+          className={classNames(
+            "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
+            tab === "Settings"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
+          )}
+          onClick={() => onChangeTab("Settings")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Settings" ? "opacity-100" : "opacity-0",
+            )}
+          />
+          Settings
+        </button>
+      </div>
+      <div className={"flex items-center min-w-0"}>
+        {version ? (
+          <div className={"hidden sm:flex items-center"}>
+            <VersionTag>v{version}</VersionTag>
+          </div>
+        ) : null}
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <RepoButton />
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <div className="hidden sm:block">
+          <ShareButton key={edit} onShare={onShare} />
+        </div>
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <ThemeButton theme={theme} onChange={onChangeTheme} />
+      </div>
+    </div>
+  );
+}

playground/src/Editor/RepoButton.tsx

@@ -0,0 +1,27 @@
+export default function RepoButton() {
+  return (
+    <a
+      className={"hover:text-ayu-accent/70 text-ayu-accent"}
+      href={"https://github.com/charliermarsh/ruff"}
+      target={"_blank"}
+      rel={"noreferrer"}
+    >
+      <svg
+        xmlns={"http://www.w3.org/2000/svg"}
+        width={"24"}
+        height={"24"}
+        viewBox={"0 0 16 16"}
+        fill={"none"}
+      >
+        <path
+          fillRule={"evenodd"}
+          clipRule={"evenodd"}
+          d={
+            "M8 0C3.58 0 0 3.58 0 8C0 11.54 2.29 14.53 5.47 15.59C5.87 15.66 6.02 15.42 6.02 15.21C6.02 15.02 6.01 14.39 6.01 13.72C4 14.09 3.48 13.23 3.32 12.78C3.23 12.55 2.84 11.84 2.5 11.65C2.22 11.5 1.82 11.13 2.49 11.12C3.12 11.11 3.57 11.7 3.72 11.94C4.44 13.15 5.59 12.81 6.05 12.6C6.12 12.08 6.33 11.73 6.56 11.53C4.78 11.33 2.92 10.64 2.92 7.58C2.92 6.71 3.23 5.99 3.74 5.43C3.66 5.23 3.38 4.41 3.82 3.31C3.82 3.31 4.49 3.1 6.02 4.13C6.66 3.95 7.34 3.86 8.02 3.86C8.7 3.86 9.38 3.95 10.02 4.13C11.55 3.09 12.22 3.31 12.22 3.31C12.66 4.41 12.38 5.23 12.3 5.43C12.81 5.99 13.12 6.7 13.12 7.58C13.12 10.65 11.25 11.33 9.47 11.53C9.76 11.78 10.01 12.26 10.01 13.01C10.01 14.08 10 14.94 10 15.21C10 15.42 10.15 15.67 10.55 15.59C13.71 14.53 16 11.53 16 8C16 3.58 12.42 0 8 0Z"
+          }
+          fill={"currentColor"}
+        />
+      </svg>
+    </a>
+  );
+}

playground/src/Editor/SettingsEditor.tsx

@@ -0,0 +1,57 @@
+/**
+ * Editor for the settings JSON.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { useCallback, useEffect } from "react";
+import schema from "../../../ruff.schema.json";
+import { Theme } from "./theme";
+
+export default function SettingsEditor({
+  visible,
+  source,
+  theme,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  theme: Theme;
+  onChange: (source: string) => void;
+}) {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    monaco?.languages.json.jsonDefaults.setDiagnosticsOptions({
+      schemas: [
+        {
+          uri: "https://raw.githubusercontent.com/charliermarsh/ruff/main/ruff.schema.json",
+          fileMatch: ["*"],
+          schema,
+        },
+      ],
+    });
+  }, [monaco]);
+
+  const handleChange = useCallback(
+    (value: string | undefined) => {
+      onChange(value ?? "");
+    },
+    [onChange],
+  );
+  return (
+    <Editor
+      options={{
+        readOnly: false,
+        minimap: { enabled: false },
+        fontSize: 14,
+        roundedSelection: false,
+        scrollBeyondLastLine: false,
+      }}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      language={"json"}
+      value={source}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
+      onChange={handleChange}
+    />
+  );
+}

playground/src/Editor/ShareButton.tsx

@@ -0,0 +1,53 @@
+import { useEffect, useState } from "react";
+
+export default function ShareButton({ onShare }: { onShare?: () => void }) {
+  const [copied, setCopied] = useState(false);
+
+  useEffect(() => {
+    if (copied) {
+      const timeout = setTimeout(() => setCopied(false), 2000);
+      return () => clearTimeout(timeout);
+    }
+  }, [copied]);
+
+  return copied ? (
+    <button
+      type="button"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 cursor-auto text-ayu-accent shadow-copied dark:bg-ayu-accent/10"
+    >
+      <span
+        className="absolute inset-0 flex items-center justify-center invisible"
+        aria-hidden="true"
+      >
+        Share
+      </span>
+      <span className="" aria-hidden="false">
+        Copied!
+      </span>
+    </button>
+  ) : (
+    <button
+      type="button"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 enabled:hover:bg-ayu-accent/70 bg-ayu-accent text-white shadow-sm dark:shadow-highlight/20 disabled:opacity-50"
+      disabled={!onShare || copied}
+      onClick={
+        onShare
+          ? () => {
+              setCopied(true);
+              onShare();
+            }
+          : undefined
+      }
+    >
+      <span
+        className="absolute inset-0 flex items-center justify-center"
+        aria-hidden="false"
+      >
+        Share
+      </span>
+      <span className="invisible" aria-hidden="true">
+        Copied!
+      </span>
+    </button>
+  );
+}

playground/src/Editor/SourceEditor.tsx

@@ -0,0 +1,117 @@
+/**
+ * Editor for the Python source code.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { MarkerSeverity, MarkerTag } from "monaco-editor";
+import { useCallback, useEffect } from "react";
+import { Diagnostic } from "../pkg";
+import { Theme } from "./theme";
+
+export default function SourceEditor({
+  visible,
+  source,
+  theme,
+  diagnostics,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  diagnostics: Diagnostic[];
+  theme: Theme;
+  onChange: (pythonSource: string) => void;
+}) {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    const editor = monaco?.editor;
+    const model = editor?.getModels()[0];
+    if (!editor || !model) {
+      return;
+    }
+
+    editor.setModelMarkers(
+      model,
+      "owner",
+      diagnostics.map((diagnostic) => ({
+        startLineNumber: diagnostic.location.row,
+        startColumn: diagnostic.location.column + 1,
+        endLineNumber: diagnostic.end_location.row,
+        endColumn: diagnostic.end_location.column + 1,
+        message: `${diagnostic.code}: ${diagnostic.message}`,
+        severity: MarkerSeverity.Error,
+        tags:
+          diagnostic.code === "F401" || diagnostic.code === "F841"
+            ? [MarkerTag.Unnecessary]
+            : [],
+      })),
+    );
+
+    const codeActionProvider = monaco?.languages.registerCodeActionProvider(
+      "python",
+      {
+        // @ts-expect-error: The type definition is wrong.
+        provideCodeActions: function (model, position) {
+          const actions = diagnostics
+            .filter((check) => position.startLineNumber === check.location.row)
+            .filter((check) => check.fix)
+            .map((check) => ({
+              title: check.fix
+                ? `${check.code}: ${check.fix.message}` ?? `Fix ${check.code}`
+                : "Autofix",
+              id: `fix-${check.code}`,
+              kind: "quickfix",
+              edit: check.fix
+                ? {
+                    edits: [
+                      {
+                        resource: model.uri,
+                        versionId: model.getVersionId(),
+                        edit: {
+                          range: {
+                            startLineNumber: check.fix.location.row,
+                            startColumn: check.fix.location.column + 1,
+                            endLineNumber: check.fix.end_location.row,
+                            endColumn: check.fix.end_location.column + 1,
+                          },
+                          text: check.fix.content,
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+            }));
+          return { actions, dispose: () => {} };
+        },
+      },
+    );
+
+    return () => {
+      codeActionProvider?.dispose();
+    };
+  }, [diagnostics, monaco]);
+
+  const handleChange = useCallback(
+    (value: string | undefined) => {
+      onChange(value ?? "");
+    },
+    [onChange],
+  );
+
+  return (
+    <Editor
+      options={{
+        readOnly: false,
+        minimap: { enabled: false },
+        fontSize: 14,
+        roundedSelection: false,
+        scrollBeyondLastLine: false,
+      }}
+      language={"python"}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
+      value={source}
+      onChange={handleChange}
+    />
+  );
+}

playground/src/Editor/ThemeButton.tsx

@@ -0,0 +1,49 @@
+/**
+ * Button to toggle between light and dark mode themes.
+ */
+import { Theme } from "./theme";
+
+export default function ThemeButton({
+  theme,
+  onChange,
+}: {
+  theme: Theme;
+  onChange: (theme: Theme) => void;
+}) {
+  return (
+    <button
+      type="button"
+      className="ml-4 sm:ml-0 ring-1 ring-gray-900/5 shadow-sm hover:bg-gray-50 dark:ring-0 dark:bg-gray-800 dark:hover:bg-gray-700 dark:shadow-highlight/4 group focus:outline-none focus-visible:ring-2 rounded-md focus-visible:ring-ayu-accent dark:focus-visible:ring-2 dark:focus-visible:ring-gray-400"
+      onClick={() => onChange(theme === "light" ? "dark" : "light")}
+    >
+      <span className="sr-only">
+        <span className="dark:hidden">Switch to dark theme</span>
+        <span className="hidden dark:inline">Switch to light theme</span>
+      </span>
+      <svg
+        width="36"
+        height="36"
+        viewBox="-6 -6 36 36"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        className="stroke-ayu-accent fill-ayu-accent/10 group-hover:stroke-ayu-accent/80 dark:stroke-gray-400 dark:fill-gray-400/20 dark:group-hover:stroke-gray-300"
+      >
+        <g className="dark:opacity-0">
+          <path d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z"></path>
+          <path
+            d="M12 4v.01M17.66 6.345l-.007.007M20.005 12.005h-.01M17.66 17.665l-.007-.007M12 20.01V20M6.34 17.665l.007-.007M3.995 12.005h.01M6.34 6.344l.007.007"
+            fill="none"
+          />
+        </g>
+        <g className="opacity-0 dark:opacity-100">
+          <path d="M16 12a4 4 0 1 1-8 0 4 4 0 0 1 8 0Z" />
+          <path
+            d="M12 3v1M18.66 5.345l-.828.828M21.005 12.005h-1M18.66 18.665l-.828-.828M12 21.01V20M5.34 18.666l.835-.836M2.995 12.005h1.01M5.34 5.344l.835.836"
+            fill="none"
+          />
+        </g>
+      </svg>
+    </button>
+  );
+}

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>
+  );
+}

playground/src/Editor/index.tsx

@@ -0,0 +1,3 @@
+import Editor from "./Editor";
+
+export default Editor;

playground/src/Editor/settings.ts

@@ -0,0 +1,50 @@
+import lzstring from "lz-string";
+
+export type Settings = { [K: string]: any };
+
+/**
+ * Stringify a settings object to JSON.
+ */
+export function stringify(settings: Settings): string {
+  return JSON.stringify(
+    settings,
+    (k, v) => {
+      if (v instanceof Map) {
+        return Object.fromEntries(v.entries());
+      } else {
+        return v;
+      }
+    },
+    2,
+  );
+}
+
+/**
+ * Persist the configuration to a URL.
+ */
+export async function persist(settingsSource: string, pythonSource: string) {
+  const hash = lzstring.compressToEncodedURIComponent(
+    settingsSource + "$$$" + pythonSource,
+  );
+  await navigator.clipboard.writeText(
+    window.location.href.split("#")[0] + "#" + hash,
+  );
+}
+
+/**
+ * Restore the configuration from a URL.
+ */
+export function restore(): [string, string] | null {
+  const value = lzstring.decompressFromEncodedURIComponent(
+    window.location.hash.slice(1),
+  );
+
+  if (value) {
+    const parts = value.split("$$$");
+    const settingsSource = parts[0];
+    const pythonSource = parts[1];
+    return [settingsSource, pythonSource];
+  } else {
+    return null;
+  }
+}

playground/src/Editor/theme.ts

@@ -0,0 +1,35 @@
+/**
+ * Light and dark mode theming.
+ */
+import { useEffect, useState } from "react";
+
+export type Theme = "dark" | "light";
+
+export function useTheme(): [Theme, (theme: Theme) => void] {
+  const [localTheme, setLocalTheme] = useState<Theme>("light");
+
+  const setTheme = (mode: Theme) => {
+    if (mode === "dark") {
+      document.body.classList.add("dark");
+    } else {
+      document.body.classList.remove("dark");
+    }
+    localStorage.setItem("theme", mode);
+    setLocalTheme(mode);
+  };
+
+  useEffect(() => {
+    const initialTheme = localStorage.getItem("theme");
+    if (initialTheme === "dark") {
+      setTheme("dark");
+    } else if (initialTheme === "light") {
+      setTheme("light");
+    } else if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
+      setTheme("dark");
+    } else {
+      setTheme("light");
+    }
+  }, []);
+
+  return [localTheme, setTheme];
+}

playground/src/Editor/utils.ts

@@ -0,0 +1,7 @@
+export async function copyTextToClipboard(text: string) {
+  if ("clipboard" in navigator) {
+    return await navigator.clipboard.writeText(text);
+  } else {
+    return document.execCommand("copy", true, text);
+  }
+}

playground/src/constants.ts

@@ -0,0 +1,31 @@
+export const DEFAULT_PYTHON_SOURCE =
+  "import os\n" +
+  "\n" +
+  "# Define a function that takes an integer n and returns the nth number in the Fibonacci\n" +
+  "# sequence.\n" +
+  "def fibonacci(n):\n" +
+  '    """Compute the nth number in the Fibonacci sequence."""\n' +
+  "    x = 1\n" +
+  "    if n == 0:\n" +
+  "        return 0\n" +
+  "    elif n == 1:\n" +
+  "        return 1\n" +
+  "    else:\n" +
+  "        return fibonacci(n - 1) + fibonacci(n - 2)\n" +
+  "\n" +
+  "\n" +
+  "# Use a for loop to generate and print the first 10 numbers in the Fibonacci sequence.\n" +
+  "for i in range(10):\n" +
+  "    print(fibonacci(i))\n" +
+  "\n" +
+  "# Output:\n" +
+  "# 0\n" +
+  "# 1\n" +
+  "# 1\n" +
+  "# 2\n" +
+  "# 3\n" +
+  "# 5\n" +
+  "# 8\n" +
+  "# 13\n" +
+  "# 21\n" +
+  "# 34\n";

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);
+}

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>,
+);

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;
+}

playground/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />

playground/tailwind.config.cjs

@@ -0,0 +1,22 @@
+/** @type {import('tailwindcss').Config} */
+const defaultTheme = require("tailwindcss/defaultTheme");
+
+module.exports = {
+  darkMode: "class",
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  theme: {
+    extend: {
+      colors: {
+        "ayu-accent": "#fa8d3e",
+        "ayu-background": {
+          DEFAULT: "#f8f9fa",
+          dark: "#0b0e14",
+        },
+      },
+      fontFamily: {
+        sans: ["Inter var", ...defaultTheme.fontFamily.sans],
+      },
+    },
+  },
+  plugins: [],
+};

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" }]
+}

playground/tsconfig.node.json

@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}

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()],
+});

pyproject.toml

@@ -1,5 +1,23 @@
+[build-system]
+requires = ["maturin>=0.14.10,<0.15"]
+# We depend on >=0.14.10 because we specify name in
+# [package.metadata.maturin] in ruff_cli/Cargo.toml.
+
+build-backend = "maturin"
+
 [project]
 name = "ruff"
+version = "0.0.240"
+description = "An extremely fast Python linter, written in Rust."
+authors = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+maintainers = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+readme = "README.md"
+requires-python = ">=3.7"
+license = { file = "LICENSE" }
 keywords = ["automation", "flake8", "pycodestyle", "pyflakes", "pylint", "clippy"]
 classifiers = [
     "Development Status :: 3 - Alpha",
@@ -12,27 +30,15 @@ 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",
 ]
-author = "Charlie Marsh"
-author_email = "charlie.r.marsh@gmail.com"
-description = "An extremely fast Python linter, written in Rust."
-requires-python = ">=3.7"
-
-[project.urls]
-repository = "https://github.com/charliermarsh/ruff"
-
-[build-system]
-requires = ["maturin>=0.13,<0.14"]
-build-backend = "maturin"
+urls = { repository = "https://github.com/charliermarsh/ruff" }
 
 [tool.maturin]
 bindings = "bin"
-sdist-include = ["Cargo.lock"]
+manifest-path = "ruff_cli/Cargo.toml"
+python-source = "python"
 strip = true
-
-[tool.isort]
-profile = "black"
-known_third_party = ["fastapi", "pydantic", "starlette"]

python/ruff/__main__.py

@@ -0,0 +1,7 @@
+import os
+import sys
+import sysconfig
+
+if __name__ == "__main__":
+    ruff = os.path.join(sysconfig.get_path("scripts"), "ruff")
+    sys.exit(os.spawnv(os.P_WAIT, ruff, [ruff, *sys.argv[1:]]))

resources/test/fixtures/C400.py

@@ -1,4 +0,0 @@
-x = list(x for x in range(3))
-x = list(
-    x for x in range(3)
-)

resources/test/fixtures/C401.py

@@ -1,4 +0,0 @@
-x = set(x for x in range(3))
-x = set(
-    x for x in range(3)
-)

resources/test/fixtures/C405.py

@@ -1,5 +0,0 @@
-s1 = set([1, 2])
-s2 = set((1, 2))
-s3 = set([])
-s4 = set(())
-s5 = set()

resources/test/fixtures/F541.py

@@ -1,11 +0,0 @@
-a = "abc"
-b = f"ghi{'jkl'}"
-
-c = f"def"
-d = f"def" + "ghi"
-e = (
-    f"def" +
-    "ghi"
-)
-
-g = f"ghi{123:{45}}"

resources/test/fixtures/F601.py

@@ -1,12 +0,0 @@
-x = {
-    "a": 1,
-    "a": 2,
-    "b": 3,
-    ("a", "b"): 3,
-    ("a", "b"): 4,
-    1.0: 2,
-    1: 0,
-    1: 3,
-    b"123": 1,
-    b"123": 4,
-}

resources/test/fixtures/F602.py

@@ -1,7 +0,0 @@
-a = 1
-b = 2
-x = {
-    a: 1,
-    a: 2,
-    b: 3,
-}

resources/test/fixtures/F632.py

@@ -1,8 +0,0 @@
-if x is "abc":
-    pass
-
-if 123 is not y:
-    pass
-
-if "123" is x < 3:
-    pass

resources/test/fixtures/F831.py

@@ -1,10 +0,0 @@
-def foo(x: int, y: int, x: int) -> None:
-    pass
-
-
-def bar(x: int, y: int, *, x: int) -> None:
-    pass
-
-
-def baz(x: int, y: int, **x: int) -> None:
-    pass

resources/test/fixtures/F841.py

@@ -1,37 +0,0 @@
-try:
-    1 / 0
-except ValueError as e:
-    pass
-
-
-try:
-    1 / 0
-except ValueError as e:
-    print(e)
-
-
-def f1():
-    x = 1
-    y = 2
-    z = x + y
-
-
-def f2():
-    foo = (1, 2)
-    (a, b) = (1, 2)
-
-    bar = (1, 2)
-    (c, d) = bar
-
-    (x, y) = baz = bar
-
-
-def f3():
-    locals()
-    x = 1
-
-
-def f4():
-    _ = 1
-    __ = 1
-    _discarded = 1

resources/test/fixtures/N806.py

@@ -1,5 +0,0 @@
-def f():
-    lower = 0
-    Camel = 0
-    CONSTANT = 0
-    _ = 0

resources/test/fixtures/N807.py

@@ -1,15 +0,0 @@
-def __bad__():
-    pass
-
-
-def __good():
-    pass
-
-
-def good__():
-    pass
-
-
-class Class:
-    def __good__(self):
-        pass

resources/test/fixtures/N815.py

@@ -1,6 +0,0 @@
-class C:
-    lower = 0
-    CONSTANT = 0
-    mixedCase = 0
-    _mixedCase = 0
-    mixed_Case = 0

resources/test/fixtures/N816.py

@@ -1,5 +0,0 @@
-lower = 0
-CONSTANT = 0
-mixedCase = 0
-_mixedCase = 0
-mixed_Case = 0

resources/test/fixtures/README.md

@@ -0,0 +1,3 @@
+# fixtures
+
+Fixture files used for snapshot testing.

resources/test/fixtures/RUF002.py

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

resources/test/fixtures/RUF003.py

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

resources/test/fixtures/T201.py

@@ -1 +0,0 @@
-print("Hello, world!")  # T201

resources/test/fixtures/U002.py

@@ -1,15 +0,0 @@
-from os.path import abspath
-
-x = abspath(__file__)
-
-
-import os
-
-
-y = os.path.abspath(__file__)
-
-
-from os import path
-
-
-z = path.abspath(__file__)

resources/test/fixtures/U003.py

@@ -1,5 +0,0 @@
-type('')
-type(b'')
-type(0)
-type(0.)
-type(0j)

resources/test/fixtures/U006.py

@@ -1,12 +0,0 @@
-from typing import List
-
-
-def f(x: List[str]) -> None:
-    ...
-
-
-import typing
-
-
-def f(x: typing.List[str]) -> None:
-    ...

resources/test/fixtures/U009_0.py

@@ -1,3 +0,0 @@
-# coding=utf8
-
-print('Hello world')

resources/test/fixtures/U010.py

@@ -1,5 +0,0 @@
-from __future__ import annotations, nested_scopes, generators
-
-from __future__ import absolute_import, division
-
-from __future__ import generator_stop

resources/test/fixtures/U011_0.py

@@ -1,103 +0,0 @@
-import functools
-from functools import lru_cache
-
-
-@lru_cache()
-def fixme1():
-    pass
-
-
-@other_deco_after
-@functools.lru_cache()
-def fixme2():
-    pass
-
-
-@lru_cache(maxsize=None)
-def fixme3():
-    pass
-
-
-@functools.lru_cache(maxsize=None)
-@other_deco_before
-def fixme4():
-    pass
-
-
-@lru_cache( # A 
-) # B
-def fixme5():
-    pass
-
-
-@lru_cache(
-    # A
-)   # B
-def fixme6():
-    pass
-
-
-@functools.lru_cache(
-    # A
-    maxsize = None) # B
-def fixme7():
-    pass
-
-
-@functools.lru_cache(
-    # A1
-    maxsize = None
-    # A2
-) # B
-def fixme8():
-    pass
-
-
-@functools.lru_cache(
-    # A1
-    maxsize = 
-    None
-    # A2
-
-)
-def fixme9():
-    pass
-
-
-@functools.lru_cache(
-    # A1
-    maxsize = 
-    None
-    # A2
-)
-def fixme10():
-    pass
-
-
-@lru_cache
-def correct1():
-    pass
-
-
-@functools.lru_cache
-def correct2():
-    pass
-
-
-@functoools.lru_cache(maxsize=64)
-def correct3():
-    pass
-
-
-def user_func():
-    pass
-
-
-@lru_cache(user_func)
-def correct4():
-    pass
-
-
-@lru_cache(user_func, maxsize=None)
-def correct5():
-    pass

resources/test/fixtures/U011_1.py

@@ -1,15 +0,0 @@
-import functools
-
-
-def lru_cache(maxsize=None):
-    pass
-
-
-@lru_cache()
-def dont_fixme():
-    pass
-
-
-@lru_cache(maxsize=None)
-def dont_fixme():
-    pass

resources/test/fixtures/W292_2.py

@@ -1,2 +0,0 @@
-def fn() -> None:
-    pass

resources/test/fixtures/eradicate/ERA001.py

@@ -0,0 +1,15 @@
+#import os
+# from foo import junk
+#a = 3
+a = 4
+#foo(1, 2, 3)
+
+def foo(x, y, z):
+    content = 1 # print('hello')
+    print(x, y, z)
+
+    # This is a real comment.
+    #return True
+    return False
+
+#import os  # noqa: ERA001

resources/test/fixtures/flake8_2020/YTT101.py

@@ -0,0 +1,12 @@
+import sys
+from sys import version, version as v
+
+print(sys.version)
+
+print(sys.version[:3])
+print(version[:3])
+print(v[:3])
+
+# the tool is timid and only flags certain numeric slices
+i = 3
+print(sys.version[:i])

resources/test/fixtures/flake8_2020/YTT102.py

@@ -0,0 +1,5 @@
+import sys
+from sys import version
+
+py_minor = sys.version[2]
+py_minor = version[2]

resources/test/fixtures/flake8_2020/YTT103.py

@@ -0,0 +1,8 @@
+import sys
+from sys import version
+
+version < "3.5"
+sys.version < "3.5"
+sys.version <= "3.5"
+sys.version > "3.5"
+sys.version >= "3.5"

resources/test/fixtures/flake8_2020/YTT201.py

@@ -0,0 +1,10 @@
+import sys
+from sys import version_info
+
+print("{}.{}".format(*sys.version_info))
+PY3 = sys.version_info[0] >= 3
+
+PY3 = sys.version_info[0] == 3
+PY3 = version_info[0] == 3
+PY2 = sys.version_info[0] != 3
+PY2 = version_info[0] != 3