Update docs

* Format Binary Expressions

* Extract NeedsParentheses trait

.cargo/config.toml

@@ -0,0 +1,37 @@
+[alias]
+dev = "run --package ruff_dev --bin ruff_dev"
+benchmark = "bench -p ruff_benchmark --bench linter --bench formatter --"
+
+[target.'cfg(all())']
+rustflags = [
+  # CLIPPY LINT SETTINGS
+  # This is a workaround to configure lints for the entire workspace, pending the ability to configure this via TOML.
+  # See: `https://github.com/rust-lang/cargo/issues/5034`
+  #      `https://github.com/EmbarkStudios/rust-ecosystem/issues/22#issuecomment-947011395`
+  "-Dunsafe_code",
+  "-Wclippy::pedantic",
+  # Allowed pedantic lints
+  "-Wclippy::char_lit_as_u8",
+  "-Aclippy::collapsible_else_if",
+  "-Aclippy::collapsible_if",
+  "-Aclippy::implicit_hasher",
+  "-Aclippy::match_same_arms",
+  "-Aclippy::missing_errors_doc",
+  "-Aclippy::missing_panics_doc",
+  "-Aclippy::module_name_repetitions",
+  "-Aclippy::must_use_candidate",
+  "-Aclippy::similar_names",
+  "-Aclippy::too_many_lines",
+  # Disallowed restriction lints
+  "-Wclippy::print_stdout",
+  "-Wclippy::print_stderr",
+  "-Wclippy::dbg_macro",
+  "-Wclippy::empty_drop",
+  "-Wclippy::empty_structs_with_brackets",
+  "-Wclippy::exit",
+  "-Wclippy::get_unwrap",
+  "-Wclippy::rc_buffer",
+  "-Wclippy::rc_mutex",
+  "-Wclippy::rest_pat_in_fully_bound_structs",
+  "-Wunreachable_pub"
+]

.devcontainer/devcontainer.json

@@ -0,0 +1,46 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/rust
+{
+	"name": "Ruff",
+	"image": "mcr.microsoft.com/devcontainers/rust:0-1-bullseye",
+	"mounts": [
+		{
+			"source": "devcontainer-cargo-cache-${devcontainerId}",
+			"target": "/usr/local/cargo",
+			"type": "volume"
+		}
+	],
+	"customizations": {
+		"codespaces": {
+			"openFiles": [
+				"CONTRIBUTING.md"
+			]
+		},
+		"vscode": {
+			"extensions": [
+				"ms-python.python",
+				"rust-lang.rust-analyzer",
+				"serayuzgur.crates",
+				"tamasfe.even-better-toml",
+				"Swellaby.vscode-rust-test-adapter",
+				"charliermarsh.ruff"
+			],
+			"settings": {
+				"rust-analyzer.updates.askBeforeDownload": false
+			}
+		}
+	},
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	"features": {
+		"ghcr.io/devcontainers/features/python": {
+			"installTools": false
+		}
+	},
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+	"postCreateCommand": ".devcontainer/post-create.sh"
+	// Configure tool-specific properties.
+	// "customizations": {},
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.devcontainer/post-create.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+rustup default < rust-toolchain
+rustup component add clippy rustfmt
+cargo install cargo-insta
+cargo fetch
+
+pip install maturin pre-commit

.editorconfig

@@ -0,0 +1,20 @@
+# Check http://editorconfig.org for more information
+# This is the main config file for this project:
+root = true
+
+[*]
+charset = utf-8
+trim_trailing_whitespace = true
+end_of_line = lf
+indent_style = space
+insert_final_newline = true
+indent_size = 2
+
+[*.{rs,py}]
+indent_size = 4
+
+[*.snap]
+trim_trailing_whitespace = false
+
+[*.md]
+max_line_length = 100

.gitattributes

@@ -0,0 +1,6 @@
+* text=auto eol=lf
+
+crates/ruff/resources/test/fixtures/isort/line_ending_crlf.py text eol=crlf
+crates/ruff/resources/test/fixtures/pycodestyle/W605_1.py text eol=crlf
+
+ruff.schema.json linguist-generated=true text=auto eol=lf

.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/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,15 @@
+<!--
+Thank you for contributing to Ruff! To help us out with reviewing, please consider the following:
+
+- Does this pull request include a summary of the change? (See below.)
+- Does this pull request include a descriptive title?
+- Does this pull request include references to any relevant issues?
+-->
+
+## Summary
+
+<!-- What's the purpose of the change? What does it do, and why? -->
+
+## Test Plan
+
+<!-- How was it tested? -->

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "12:00"
+      timezone: "America/New_York"
+    commit-message:
+      prefix: "ci(deps)"

.github/release.yml

@@ -0,0 +1,24 @@
+# https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes#configuring-automatically-generated-release-notes
+changelog:
+  exclude:
+    labels:
+      - internal
+      - documentation
+  categories:
+    - title: Breaking Changes
+      labels:
+        - breaking
+    - title: Rules
+      labels:
+        - rule
+        - autofix
+    - title: Settings
+      labels:
+        - configuration
+        - cli
+    - title: Bug Fixes
+      labels:
+        - bug
+    - title: Other Changes
+      labels:
+        - "*"

.github/workflows/benchmark.yaml

@@ -0,0 +1,135 @@
+name: Benchmark
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  run-benchmark:
+    if: github.event_name == 'pull_request'
+    name: "Run | ${{ matrix.os }}"
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: "PR - Checkout Branch"
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: "PR - Install Rust toolchain"
+        run: rustup show
+
+      - uses: Swatinem/rust-cache@v2
+
+      - name: "PR - Build benchmarks"
+        uses: actions-rs/cargo@v1
+        with:
+          command: bench
+          args: -p ruff_benchmark --no-run
+
+      - name: "PR - Run benchmarks"
+        run: cargo benchmark --save-baseline=pr
+
+      - name: "Main - Checkout Branch"
+        uses: actions/checkout@v3
+        with:
+          clean: false
+          ref: main
+
+      - name: "Main - Install Rust toolchain"
+        run: rustup show
+
+      - name: "Main - Build benchmarks"
+        uses: actions-rs/cargo@v1
+        with:
+          command: bench
+          args: -p ruff_benchmark --no-run
+
+      - name: "Main - Run benchmarks"
+        run: cargo benchmark --save-baseline=main
+
+      - name: "Upload benchmark results"
+        uses: actions/upload-artifact@v3
+        with:
+          name: benchmark-results-${{ matrix.os }}
+          path: ./target/criterion
+
+      # Cleanup
+      - name: Remove Criterion Artifact
+        uses: JesseTG/rm@v1.0.3
+        with:
+          path: ./target/criterion
+
+  benchmark-compare:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    name: Compare
+    needs:
+      - run-benchmark
+
+    steps:
+      - name: "Install Rust toolchain"
+        run: rustup show
+
+      - name: "Install cargo-binstall"
+        uses: taiki-e/install-action@cargo-binstall
+
+      - name: "Install critcmp"
+        run: cargo binstall critcmp -y
+
+      - name: "Linux | Download PR benchmark results"
+        uses: actions/download-artifact@v3
+        with:
+          name: benchmark-results-ubuntu-latest
+          path: ./target/criterion
+
+      - name: "Linux | Compare benchmark results"
+        shell: bash
+        run: |
+          echo "### Benchmark" >> summary.md
+          echo "#### Linux" >> summary.md
+          echo "\`\`\`" >> summary.md
+          critcmp main pr >> summary.md
+          echo "\`\`\`" >> summary.md
+          echo "" >> summary.md
+
+      - name: "Linux | Cleanup benchmark results"
+        run: rm -rf ./target/criterion
+
+      - name: "Windows | Download PR benchmark results"
+        uses: actions/download-artifact@v3
+        with:
+          name: benchmark-results-windows-latest
+          path: ./target/criterion
+
+      - name: "Windows | Compare benchmark results"
+        shell: bash
+        run: |
+          echo "#### Windows" >> summary.md
+          echo "\`\`\`" >> summary.md
+          critcmp main pr >> summary.md
+          echo "\`\`\`" >> summary.md
+          echo "" >> summary.md
+
+          echo ${{ github.event.pull_request.number }} > pr-number
+
+          cat summary.md > $GITHUB_STEP_SUMMARY
+
+      - uses: actions/upload-artifact@v3
+        name: Upload PR Number
+        with:
+          name: pr-number
+          path: pr-number
+
+      - uses: actions/upload-artifact@v3
+        name: Upload Summary
+        with:
+          name: summary
+          path: summary.md

.github/workflows/ci.yaml

@@ -4,119 +4,254 @@ 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
+  PACKAGE_NAME: ruff
+  PYTHON_VERSION: "3.7" # to build abi3 wheels
 
 jobs:
-  cargo_build:
-    name: "cargo build"
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-      - 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 --release
-
-  cargo_fmt:
+  cargo-fmt:
     name: "cargo fmt"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-      - 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 fmt --check
+      - name: "Install Rust toolchain"
+        run: rustup component add rustfmt
+      - run: cargo fmt --all --check
 
-  cargo_clippy:
+  cargo-clippy:
     name: "cargo clippy"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-      - 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 -- -D warnings
+      - name: "Install Rust toolchain"
+        run: |
+          rustup component add clippy
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy --workspace --all-targets --all-features -- -D warnings
 
-  cargo_test:
-    name: "cargo test"
+  cargo-clippy-wasm:
+    name: "cargo clippy (wasm)"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-      - 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
+      - name: "Install Rust toolchain"
+        run: |
+          rustup component add clippy
+          rustup target add wasm32-unknown-unknown
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy -p ruff_wasm --target wasm32-unknown-unknown --all-features -- -D warnings
 
-  maturin_build:
-    name: "maturin build"
+  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@v2
+      - run: cargo install cargo-insta
+      - run: pip install black[d]==23.1.0
+      - name: "Run tests (Ubuntu)"
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+        run: |
+          cargo insta test --all --all-features --delete-unreferenced-snapshots
+          git diff --exit-code
+      - name: "Run tests (Windows)"
+        if: ${{ matrix.os == 'windows-latest' }}
+        shell: bash
+        run: |
+          cargo insta test --all --all-features
+          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"
+      - uses: actions/upload-artifact@v3
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+        with:
+          name: ruff
+          path: target/debug/ruff
+
+  cargo-test-wasm:
+    runs-on: ubuntu-latest
+    name: "cargo test (wasm)"
+    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: Swatinem/rust-cache@v2
+      - name: "Run wasm-pack"
+        run: |
+          cd crates/ruff_wasm
+          wasm-pack test --node
+
+  scripts:
+    name: "test scripts"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
+      - name: "Install Rust toolchain"
+        run: rustup component add rustfmt
+      - uses: Swatinem/rust-cache@v2
+      - run: ./scripts/add_rule.py --name DoTheThing --prefix PL --code C0999 --linter pylint
+      - run: cargo check
+      - run: cargo fmt --all --check
+      - run: |
+          ./scripts/add_plugin.py test --url https://pypi.org/project/-test/0.1.0/ --prefix TST
+          ./scripts/add_rule.py --name FirstRule --prefix TST --code 001 --linter test
+      - run: cargo check
+      - run: cargo fmt --all --check
+
+  ecosystem:
+    name: "ecosystem"
+    runs-on: ubuntu-latest
+    needs: cargo-test
+    # Only runs on pull requests, since that is the only we way we can find the base version for comparison.
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
-      - run: pip install maturin
-      - uses: actions/cache@v3
-        env:
-          cache-name: cache-cargo
+          python-version: "3.11"
+
+      - uses: actions/download-artifact@v3
+        name: Download Ruff binary
+        id: ruff-target
         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
+          name: ruff
+          path: target/debug
+
+      - uses: dawidd6/action-download-artifact@v2
+        name: Download base results
+        with:
+          name: ruff
+          branch: ${{ github.event.pull_request.base.ref }}
+          check_artifacts: true
+
+      - name: Run ecosystem check
+        run: |
+          # Make executable, since artifact download doesn't preserve this
+          chmod +x ruff ${{ steps.ruff-target.outputs.download-path }}/ruff
+
+          scripts/check_ecosystem.py ruff ${{ steps.ruff-target.outputs.download-path }}/ruff | tee ecosystem-result
+          cat ecosystem-result > $GITHUB_STEP_SUMMARY
+
+          echo ${{ github.event.number }} > pr-number
+
+      - uses: actions/upload-artifact@v3
+        name: Upload PR Number
+        with:
+          name: pr-number
+          path: pr-number
+
+      - uses: actions/upload-artifact@v3
+        name: Upload Results
+        with:
+          name: ecosystem-result
+          path: ecosystem-result
+
+  cargo-udeps:
+    name: "cargo udeps"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: "Install nightly Rust toolchain"
+        # Only pinned to make caching work, update freely
+        run: rustup toolchain install nightly-2023-03-30
+      - uses: Swatinem/rust-cache@v2
+      - name: "Install cargo-udeps"
+        uses: taiki-e/install-action@cargo-udeps
+      - name: "Run cargo-udeps"
+        run: cargo +nightly-2023-03-30 udeps
+
+
+  python-package:
+    name: "python package"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          manylinux: auto
+          args: --out dist
+      - name: "Test wheel"
+        run: |
+          pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
+          ruff --help
+          python -m ruff --help
+
+  pre-commit:
+    name: "pre-commit"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v2
+      - name: "Install pre-commit"
+        run: pip install pre-commit
+      - name: "Cache pre-commit"
+        uses: actions/cache@v3
+        with:
+            path: ~/.cache/pre-commit
+            key: pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
+      - name: "Run pre-commit"
+        run: |
+          echo '```console' > $GITHUB_STEP_SUMMARY
+          # Enable color output for pre-commit and remove it for the summary
+          SKIP=cargo-fmt,clippy,dev-generate-all pre-commit run --all-files --show-diff-on-failure --color=always | \
+            tee >(sed -E 's/\x1B\[([0-9]{1,2}(;[0-9]{1,2})*)?[mGK]//g' >> $GITHUB_STEP_SUMMARY) >&1
+          exit_code=${PIPESTATUS[0]}
+          echo '```' >> $GITHUB_STEP_SUMMARY
+          exit $exit_code
+
+  docs:
+    name: "mkdocs"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v2
+      - name: "Install dependencies"
+        run: pip install -r docs/requirements.txt
+      - name: "Update README File"
+        run: python scripts/transform_readme.py --target mkdocs
+      - name: "Generate docs"
+        run: python scripts/generate_mkdocs.py
+      - name: "Check docs formatting"
+        run: python scripts/check_docs_formatted.py
+      - name: "Build docs"
+        run: mkdocs build --strict

.github/workflows/docs.yaml

@@ -0,0 +1,33 @@
+name: mkdocs
+
+on:
+  workflow_dispatch:
+  release:
+    types: [ published ]
+
+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 Rust toolchain"
+        run: rustup show
+      - uses: Swatinem/rust-cache@v2
+      - name: "Install dependencies"
+        run: |
+          pip install -r docs/requirements.txt
+      - 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

@@ -0,0 +1,247 @@
+name: "[flake8-to-ruff] Release"
+
+on: workflow_dispatch
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  PACKAGE_NAME: flake8-to-ruff
+  CRATE_NAME: flake8_to_ruff
+  PYTHON_VERSION: "3.7" # to build abi3 wheels
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  CARGO_TERM_COLOR: always
+  RUSTUP_MAX_RETRIES: 10
+
+jobs:
+  macos-x86_64:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - name: "Build wheels - x86_64"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: x86_64
+          args: --release --out dist --sdist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - name: "Install built wheel - x86_64"
+        run: |
+          pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+  macos-universal:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - name: "Build wheels - universal2"
+        uses: PyO3/maturin-action@v1
+        with:
+          args: --release --target universal2-apple-darwin --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - name: "Install built wheel - universal2"
+        run: |
+          pip install dist/${{ env.CRATE_NAME }}-*universal2.whl --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        target: [x64, x86]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: ${{ matrix.target }}
+      - name: "Install Rust toolchain"
+        run: rustup show
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - name: "Install built wheel"
+        shell: bash
+        run: |
+          python -m pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  linux:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [x86_64, i686]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          manylinux: auto
+          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - name: "Install built wheel"
+        if: matrix.target == 'x86_64'
+        run: |
+          pip install dist/${{ env.CRATE_NAME }}-*.whl --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  linux-cross:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [aarch64, armv7, s390x, ppc64le, ppc64]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          manylinux: auto
+          args: --no-default-features --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - uses: uraimo/run-on-arch-action@v2
+        if: matrix.target != 'ppc64'
+        name: Install built wheel
+        with:
+          arch: ${{ matrix.target }}
+          distro: ubuntu20.04
+          githubToken: ${{ github.token }}
+          install: |
+            apt-get update
+            apt-get install -y --no-install-recommends python3 python3-pip
+            pip3 install -U pip
+          run: |
+            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  musllinux:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target:
+          - x86_64-unknown-linux-musl
+          - i686-unknown-linux-musl
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          manylinux: musllinux_1_2
+          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - name: "Install built wheel"
+        if: matrix.target == 'x86_64-unknown-linux-musl'
+        uses: addnab/docker-run-action@v3
+        with:
+          image: alpine:latest
+          options: -v ${{ github.workspace }}:/io -w /io
+          run: |
+            apk add py3-pip
+            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links /io/dist/ --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  musllinux-cross:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform:
+          - target: aarch64-unknown-linux-musl
+            arch: aarch64
+          - target: armv7-unknown-linux-musleabihf
+            arch: armv7
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          manylinux: musllinux_1_2
+          args: --release --out dist -m ./${{ env.CRATE_NAME }}/Cargo.toml
+      - uses: uraimo/run-on-arch-action@v2
+        name: Install built wheel
+        with:
+          arch: ${{ matrix.platform.arch }}
+          distro: alpine_latest
+          githubToken: ${{ github.token }}
+          install: |
+            apk add py3-pip
+          run: |
+            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    needs:
+      - macos-universal
+      - macos-x86_64
+      - windows
+      - linux
+      - linux-cross
+      - musllinux
+      - musllinux-cross
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: wheels
+      - uses: actions/setup-python@v4
+      - name: "Publish to PyPi"
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.FLAKE8_TO_RUFF_TOKEN }}
+        run: |
+          pip install --upgrade twine
+          twine upload --skip-existing *

.github/workflows/playground.yaml

@@ -0,0 +1,47 @@
+name: "[Playground] Release"
+
+on:
+  workflow_dispatch:
+  release:
+    types: [ published ]
+
+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 crates/ruff_wasm
+      - 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/pr-comment.yaml

@@ -0,0 +1,84 @@
+name: PR Check Comment
+
+on:
+  workflow_run:
+    workflows: [CI, Benchmark]
+    types: [completed]
+  workflow_dispatch:
+    inputs:
+      workflow_run_id:
+        description: The ecosystem workflow that triggers the workflow run
+        required: true
+
+permissions:
+  pull-requests: write
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dawidd6/action-download-artifact@v2
+        name: Download PR Number
+        with:
+          name: pr-number
+          run_id: ${{ github.event.workflow_run.id ||  github.event.inputs.workflow_run_id }}
+          if_no_artifact_found: ignore
+
+      - name: Extract PR Number
+        id: pr-number
+        run: |
+          if [[ -f pr-number ]]
+          then
+            echo "pr-number=$(<pr-number)" >> $GITHUB_OUTPUT
+          fi
+
+      - uses: dawidd6/action-download-artifact@v2
+        name: "Download Ecosystem Result"
+        id: download-ecosystem-result
+        if: steps.pr-number.outputs.pr-number
+        with:
+          name: ecosystem-result
+          workflow: ci.yaml
+          pr: ${{ steps.pr-number.outputs.pr-number }}
+          path: pr/ecosystem
+          if_no_artifact_found: ignore
+
+      - uses: dawidd6/action-download-artifact@v2
+        name: "Download Benchmark Result"
+        id: download-benchmark-result
+        if: steps.pr-number.outputs.pr-number
+        with:
+          name: summary
+          workflow: benchmark.yaml
+          pr: ${{ steps.pr-number.outputs.pr-number }}
+          path: pr/benchmark
+          if_no_artifact_found: ignore
+
+      - name: Generate Comment
+        id: generate-comment
+        if: steps.download-ecosystem-result.outputs.found_artifact == 'true' || steps.download-benchmark-result.outputs.found_artifact == 'true'
+        run: |
+          echo 'comment<<EOF' >> $GITHUB_OUTPUT
+          echo '## PR Check Results' >> $GITHUB_OUTPUT
+
+          if [[ -f pr/ecosystem/ecosystem-result ]]
+          then
+            echo "### Ecosystem" >> $GITHUB_OUTPUT
+            cat pr/ecosystem/ecosystem-result >> $GITHUB_OUTPUT
+            echo "" >> $GITHUB_OUTPUT
+          fi
+
+          if [[ -f pr/benchmark/summary.md ]]
+          then
+            cat pr/benchmark/summary.md >> $GITHUB_OUTPUT
+          fi
+
+          echo 'EOF' >> $GITHUB_OUTPUT
+
+      - name: Create or update comment
+        if: steps.generate-comment.outputs.comment
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+          pr_number: ${{ steps.pr-number.outputs.pr-number }}
+          message: ${{ steps.generate-comment.outputs.comment }}
+          comment_tag: PR Check Results

.github/workflows/release.yaml

@@ -1,11 +1,9 @@
-name: Release
+name: "[ruff] Release"
 
 on:
-  pull_request:
-    branches: [main]
-  create:
-    tags:
-      - v*
+  workflow_dispatch:
+  release:
+    types: [ published ]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -14,9 +12,38 @@ 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:
+  sdist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build sdist"
+        uses: PyO3/maturin-action@v1
+        with:
+          command: sdist
+          args: --out dist
+      - name: "Test sdist"
+        run: |
+          pip install dist/${{ env.PACKAGE_NAME }}-*.tar.gz --force-reinstall
+          ruff --help
+          python -m ruff --help
+      - name: "Upload sdist"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  macos-x86_64:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v3
@@ -24,118 +51,206 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels - x86_64
-        uses: messense/maturin-action@v1
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels - x86_64"
+        uses: PyO3/maturin-action@v1
         with:
           target: x86_64
-          args: --release --out dist --sdist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel - x86_64
+          args: --release --out dist
+      - name: "Test wheel - x86_64"
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - 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
-        run: |
-          pip install dist/${{ env.PACKAGE_NAME }}-*universal2.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+          ruff --help
+          python -m ruff --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
-
-  windows:
-    runs-on: windows-latest
-    strategy:
-      matrix:
-        target: [x64, x86]
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-          architecture: ${{ matrix.target }}
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          profile: minimal
-          default: true
-      - name: Build wheels
-        uses: messense/maturin-action@v1
-        with:
-          target: ${{ matrix.target }}
-          args: --release --out dist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
-        shell: bash
+      - name: "Archive binary"
         run: |
-          python -m pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+          ARCHIVE_FILE=ruff-x86_64-apple-darwin.tar.gz
+          tar czvf $ARCHIVE_FILE -C target/x86_64-apple-darwin/release ruff
+          shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
         with:
-          name: wheels
-          path: dist
+          name: binaries
+          path: |
+            *.tar.gz
+            *.sha256
 
-  linux:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        target: [x86_64, i686]
+  macos-universal:
+    runs-on: macos-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Build wheels
-        uses: messense/maturin-action@v1
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels - universal2"
+        uses: PyO3/maturin-action@v1
         with:
-          target: ${{ matrix.target }}
-          manylinux: auto
-          args: --release --out dist
-          maturin-version: "v0.13.0"
-      - name: Install built wheel
-        if: matrix.target == 'x86_64'
+          args: --release --target universal2-apple-darwin --out dist
+      - name: "Test wheel - universal2"
         run: |
-          pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+          pip install dist/${{ env.PACKAGE_NAME }}-*universal2.whl --force-reinstall
+          ruff --help
+          python -m ruff --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
+      - name: "Archive binary"
+        run: |
+          ARCHIVE_FILE=ruff-aarch64-apple-darwin.tar.gz
+          tar czvf $ARCHIVE_FILE -C target/aarch64-apple-darwin/release ruff
+          shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            *.tar.gz
+            *.sha256
 
-  linux-cross:
-    runs-on: ubuntu-latest
+  windows:
+    runs-on: windows-latest
     strategy:
       matrix:
-        target: [aarch64, armv7, s390x, ppc64le, ppc64]
+        platform:
+          - target: x86_64-pc-windows-msvc
+            arch: x64
+          - target: i686-pc-windows-msvc
+            arch: x86
+          - target: aarch64-pc-windows-msvc
+            arch: x64
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
-      - name: Build wheels
-        uses: messense/maturin-action@v1
+          architecture: ${{ matrix.platform.arch }}
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist
+      - name: "Test wheel"
+        if: ${{ !startsWith(matrix.platform.target, 'aarch64') }}
+        shell: bash
+        run: |
+          python -m pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
+          ruff --help
+          python -m ruff --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+      - name: "Archive binary"
+        shell: bash
+        run: |
+          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.zip
+          7z a $ARCHIVE_FILE ./target/${{ matrix.platform.target }}/release/ruff.exe
+          sha256sum $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            *.zip
+            *.sha256
+
+  linux:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target:
+          - x86_64-unknown-linux-gnu
+          - i686-unknown-linux-gnu
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
+        uses: PyO3/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
-        if: matrix.target != 'ppc64'
-        name: Install built wheel
+          args: --release --out dist
+      - name: "Test wheel"
+        if: ${{ startsWith(matrix.target, 'x86_64') }}
+        run: |
+          pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
+          ruff --help
+          python -m ruff --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
-          arch: ${{ matrix.target }}
+          name: wheels
+          path: dist
+      - name: "Archive binary"
+        run: |
+          ARCHIVE_FILE=ruff-${{ matrix.target }}.tar.gz
+          tar czvf $ARCHIVE_FILE -C target/${{ matrix.target }}/release ruff
+          shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            *.tar.gz
+            *.sha256
+
+  linux-cross:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform:
+          - target: aarch64-unknown-linux-gnu
+            arch: aarch64
+            # see https://github.com/charliermarsh/ruff/issues/3791
+            # and https://github.com/gnzlbg/jemallocator/issues/170#issuecomment-1503228963
+            maturin_docker_options: -e JEMALLOC_SYS_WITH_LG_PAGE=16
+          - target: armv7-unknown-linux-gnueabihf
+            arch: armv7
+          - target: s390x-unknown-linux-gnu
+            arch: s390x
+          - target: powerpc64le-unknown-linux-gnu
+            arch: ppc64le
+          - target: powerpc64-unknown-linux-gnu
+            arch: ppc64
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          manylinux: auto
+          docker-options: ${{ matrix.platform.maturin_docker_options }}
+          args: --release --out dist
+      - uses: uraimo/run-on-arch-action@v2
+        if: matrix.platform.arch != 'ppc64'
+        name: Test wheel
+        with:
+          arch: ${{ matrix.platform.arch }}
           distro: ubuntu20.04
           githubToken: ${{ github.token }}
           install: |
@@ -144,11 +259,24 @@ jobs:
             pip3 install -U pip
           run: |
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+            ruff --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
+      - name: "Archive binary"
+        run: |
+          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.tar.gz
+          tar czvf $ARCHIVE_FILE -C target/${{ matrix.platform.target }}/release ruff
+          shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            *.tar.gz
+            *.sha256
 
   musllinux:
     runs-on: ubuntu-latest
@@ -163,14 +291,15 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
-      - name: Build wheels
-        uses: messense/maturin-action@v1
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
+        uses: PyO3/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: "Test wheel"
         if: matrix.target == 'x86_64-unknown-linux-musl'
         uses: addnab/docker-run-action@v3
         with:
@@ -179,11 +308,25 @@ jobs:
           run: |
             apk add py3-pip
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links /io/dist/ --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+            ruff --help
+            python -m ruff --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
+      - name: "Archive binary"
+        run: |
+          ARCHIVE_FILE=ruff-${{ matrix.target }}.tar.gz
+          tar czvf $ARCHIVE_FILE -C target/${{ matrix.target }}/release ruff
+          shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            *.tar.gz
+            *.sha256
 
   musllinux-cross:
     runs-on: ubuntu-latest
@@ -192,22 +335,26 @@ jobs:
         platform:
           - target: aarch64-unknown-linux-musl
             arch: aarch64
+            maturin_docker_options: -e JEMALLOC_SYS_WITH_LG_PAGE=16
           - target: armv7-unknown-linux-musleabihf
             arch: armv7
+
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
-      - name: Build wheels
-        uses: messense/maturin-action@v1
+      - name: "Prep README.md"
+        run: python scripts/transform_readme.py --target pypi
+      - name: "Build wheels"
+        uses: PyO3/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
+          docker-options: ${{ matrix.platform.maturin_docker_options }}
+      - uses: uraimo/run-on-arch-action@v2
+        name: Test wheel
         with:
           arch: ${{ matrix.platform.arch }}
           distro: alpine_latest
@@ -216,68 +363,77 @@ 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
+            ruff check --help
+      - name: "Upload wheels"
+        uses: actions/upload-artifact@v3
         with:
           name: wheels
           path: dist
-
-  pypy:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest]
-        target: [x86_64, aarch64]
-        python-version:
-          - "3.7"
-          - "3.8"
-          - "3.9"
-        exclude:
-          - os: macos-latest
-            target: aarch64
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
-        with:
-          python-version: pypy${{ matrix.python-version }}
-      - name: Build wheels
-        uses: messense/maturin-action@v1
-        with:
-          maturin-version: "v0.13.0"
-          target: ${{ matrix.target }}
-          manylinux: auto
-          args: --release --out dist -i pypy${{ matrix.python-version }}
-      - name: Install built wheel
-        if: matrix.target == 'x86_64'
+      - name: "Archive binary"
         run: |
-          pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
-      - name: Upload wheels
-        uses: actions/upload-artifact@v2
+          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.tar.gz
+          tar czvf $ARCHIVE_FILE -C target/${{ matrix.platform.target }}/release ruff
+          shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
+      - name: "Upload binary"
+        uses: actions/upload-artifact@v3
         with:
-          name: wheels
-          path: dist
+          name: binaries
+          path: |
+            *.tar.gz
+            *.sha256
 
   release:
     name: Release
     runs-on: ubuntu-latest
     needs:
-      - macos
+      - macos-universal
+      - macos-x86_64
       - windows
       - linux
       - linux-cross
       - musllinux
       - musllinux-cross
-      - pypy
     if: "startsWith(github.ref, 'refs/tags/')"
+    environment:
+      name: release
+    permissions:
+      # For pypi trusted publishing
+      id-token: write
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
         with:
           name: wheels
-      - uses: actions/setup-python@v4
-      - name: Publish to PyPi
-        env:
-          TWINE_USERNAME: __token__
-          TWINE_PASSWORD: ${{ secrets.PYPI_TOKEN }}
-        run: |
-          pip install --upgrade twine
-          twine upload --skip-existing *
+          path: wheels
+      - name: "Publish to PyPi"
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          skip-existing: true
+          packages-dir: wheels
+          verbose: true
+      - uses: actions/download-artifact@v3
+        with:
+          name: binaries
+          path: binaries
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: binaries/*
+
+  # After the release has been published, we update downstream repositories
+  # This is separate because if this fails the release is still fine, we just need to do some manual workflow triggers
+  update-dependents:
+    name: Release
+    runs-on: ubuntu-latest
+    needs: release
+    steps:
+      - name: "Update pre-commit mirror"
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.RUFF_PRE_COMMIT_PAT }}
+          script: |
+            github.rest.actions.createWorkflowDispatch({
+              owner: 'astral-sh',
+              repo: 'ruff-pre-commit',
+              workflow_id: 'main.yml',
+              ref: 'main',
+            })

.gitignore

@@ -1,6 +1,11 @@
-# Local cache
-.ruff_cache
-resources/test/cpython
+crates/ruff/resources/test/cpython
+mkdocs.yml
+.overrides
+ruff-old
+github_search*.jsonl
+schemastore
+.venv*
+scratch.py
 
 ###
 # Rust.gitignore
@@ -181,3 +186,11 @@ 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/
+
+# VIM
+.*.sw?
+.sw?

.markdownlint.yaml

@@ -0,0 +1,14 @@
+# default to true for all rules
+default: true
+
+# MD033/no-inline-html
+MD033: false
+
+# MD041/first-line-h1
+MD041: false
+
+# MD013/line-length
+MD013:
+  line_length: 100
+  code_blocks: false
+  ignore_code_blocks: true

.pre-commit-config.yaml

@@ -1,5 +1,71 @@
+fail_fast: true
+
+exclude: |
+  (?x)^(
+    crates/ruff/resources/.*|
+    crates/ruff_python_formatter/resources/.*|
+    crates/ruff_python_formatter/src/snapshots/.*
+  )$
+
 repos:
-  - repo: https://github.com/charliermarsh/ruff
-    rev: v0.0.34
+  - repo: https://github.com/abravalheri/validate-pyproject
+    rev: v0.12.1
     hooks:
-      - id: lint
+      - id: validate-pyproject
+
+  - repo: https://github.com/executablebooks/mdformat
+    rev: 0.7.16
+    hooks:
+      - id: mdformat
+        additional_dependencies:
+          - mdformat-black
+          - black==23.1.0 # Must be the latest version of Black
+
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.33.0
+    hooks:
+      - id: markdownlint-fix
+
+  - repo: https://github.com/crate-ci/typos
+    rev: v1.14.12
+    hooks:
+      - id: typos
+
+  - repo: local
+    hooks:
+      - id: cargo-fmt
+        name: cargo fmt
+        entry: cargo fmt --
+        language: system
+        types: [rust]
+      - id: clippy
+        name: clippy
+        entry: cargo clippy --workspace --all-targets --all-features -- -D warnings
+        language: system
+        pass_filenames: false
+      - id: ruff
+        name: ruff
+        entry: cargo run -p ruff_cli -- check --no-cache --force-exclude --fix --exit-non-zero-on-fix
+        language: system
+        types_or: [python, pyi]
+        require_serial: true
+        exclude: |
+          (?x)^(
+            crates/ruff/resources/.*|
+            crates/ruff_python_formatter/resources/.*
+          )$
+      - id: dev-generate-all
+        name: dev-generate-all
+        entry: cargo dev generate-all
+        language: system
+        pass_filenames: false
+        exclude: target
+
+  # Black
+  - repo: https://github.com/psf/black
+    rev: 23.1.0
+    hooks:
+      - id: black
+
+ci:
+  skip: [cargo-fmt, clippy, dev-generate-all]

.pre-commit-hooks.yaml

@@ -1,7 +0,0 @@
-- id: lint
-  name: ruff lint
-  description: Run ruff to lint Python files.
-  entry: ruff
-  language: python
-  types_or: [python]
-  pass_filenames: true

BREAKING_CHANGES.md

@@ -0,0 +1,215 @@
+# Breaking Changes
+
+## 0.0.268
+
+### The `keep-runtime-typing` setting has been removed ([#4427](https://github.com/charliermarsh/ruff/pull/4427))
+
+Enabling the `keep-runtime-typing` option, located under the `pyupgrade` section, is equivalent
+to ignoring the `UP006` and `UP007` rules via Ruff's standard `ignore` mechanism. As there's no
+need for a dedicated setting to disable these rules, the `keep-runtime-typing` option has been
+removed.
+
+## 0.0.267
+
+### `update-check` is no longer a valid configuration option ([#4313](https://github.com/charliermarsh/ruff/pull/4313))
+
+The `update-check` functionality was deprecated in [#2530](https://github.com/charliermarsh/ruff/pull/2530),
+in that the behavior itself was removed, and Ruff was changed to warn when that option was enabled.
+
+Now, Ruff will throw an error when `update-check` is provided via a configuration file (e.g.,
+`update-check = false`) or through the command-line, since it has no effect. Users should remove
+this option from their configuration.
+
+## 0.0.265
+
+### `--fix-only` now exits with a zero exit code, unless `--exit-non-zero-on-fix` is specified ([#4146](https://github.com/charliermarsh/ruff/pull/4146))
+
+Previously, `--fix-only` would exit with a non-zero exit code if any fixes were applied. This
+behavior was inconsistent with `--fix`, and further, meant that `--exit-non-zero-on-fix` was
+effectively ignored when `--fix-only` was specified.
+
+Now, `--fix-only` will exit with a zero exit code, unless `--exit-non-zero-on-fix` is specified,
+in which case it will exit with a non-zero exit code if any fixes were applied.
+
+## 0.0.260
+
+### Fixes are now represented as a list of edits ([#3709](https://github.com/charliermarsh/ruff/pull/3709))
+
+Previously, Ruff represented each fix as a single edit, which prohibited Ruff from automatically
+fixing violations that required multiple edits across a file. As such, Ruff now represents each
+fix as a list of edits.
+
+This primarily affects the JSON API. Ruff's JSON representation used to represent the `fix` field as
+a single edit, like so:
+
+```json
+{
+    "message": "Remove unused import: `sys`",
+    "content": "",
+    "location": {"row": 1, "column": 0},
+    "end_location": {"row": 2, "column": 0}
+}
+```
+
+The updated representation instead includes a list of edits:
+
+```json
+{
+    "message": "Remove unused import: `sys`",
+    "edits": [
+        {
+            "content": "",
+            "location": {"row": 1, "column": 0},
+            "end_location": {"row": 2, "column": 0},
+        }
+    ]
+}
+```
+
+## 0.0.246
+
+### `multiple-statements-on-one-line-def` (`E704`) was removed ([#2773](https://github.com/charliermarsh/ruff/pull/2773))
+
+This rule was introduced in v0.0.245. However, it turns out that pycodestyle and Flake8 ignore this
+rule by default, as it is not part of PEP 8. As such, we've removed it from Ruff.
+
+## 0.0.245
+
+### Ruff's public `check` method was removed ([#2709](https://github.com/charliermarsh/ruff/pull/2709))
+
+Previously, Ruff exposed a `check` method as a public Rust API. This method was used by few,
+if any clients, and was not well documented or supported. As such, it has been removed, with
+the intention of adding a stable public API in the future.
+
+## 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:
+
+```console
+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:
+
+  ```console
+  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 [documentation](https://beta.ruff.rs/docs/configuration/#python-file-discovery) for more.

CODE_OF_CONDUCT.md

@@ -0,0 +1,138 @@
+# Contributor Covenant Code of Conduct
+
+- [Our Pledge](#our-pledge)
+- [Our Standards](#our-standards)
+- [Enforcement Responsibilities](#enforcement-responsibilities)
+- [Scope](#scope)
+- [Enforcement](#enforcement)
+- [Enforcement Guidelines](#enforcement-guidelines)
+  - [1. Correction](#1-correction)
+  - [2. Warning](#2-warning)
+  - [3. Temporary Ban](#3-temporary-ban)
+  - [4. Permanent Ban](#4-permanent-ban)
+- [Attribution](#attribution)
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+- Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+- The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+charlie.r.marsh@gmail.com.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available [here](https://www.contributor-covenant.org/version/2/0/code_of_conduct.html).
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+For answers to common questions about this code of conduct, see the [FAQ](https://www.contributor-covenant.org/faq).
+Translations are available [here](https://www.contributor-covenant.org/translations).
+
+[homepage]: https://www.contributor-covenant.org

CONTRIBUTING.md

@@ -0,0 +1,385 @@
+# Contributing to Ruff
+
+Welcome! We're happy to have you here. Thank you in advance for your contribution to Ruff.
+
+- [The Basics](#the-basics)
+  - [Prerequisites](#prerequisites)
+  - [Development](#development)
+  - [Project Structure](#project-structure)
+  - [Example: Adding a new lint rule](#example-adding-a-new-lint-rule)
+    - [Rule naming convention](#rule-naming-convention)
+    - [Rule testing: fixtures and snapshots](#rule-testing-fixtures-and-snapshots)
+  - [Example: Adding a new configuration option](#example-adding-a-new-configuration-option)
+- [MkDocs](#mkdocs)
+- [Release Process](#release-process)
+- [Benchmarks](#benchmarks)
+
+## 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
+creating an [**issue**](https://github.com/charliermarsh/ruff/issues) outlining your proposed
+change. You can also join us on [**Discord**](https://discord.gg/c9MhzV8aU5) 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 [`flake8-pyi`](https://github.com/charliermarsh/ruff/issues/848)
+plugin, and looking to the originating [Python source](https://github.com/PyCQA/flake8-pyi)
+for guidance.
+
+### Prerequisites
+
+Ruff is written in Rust. You'll need to install the
+[Rust toolchain](https://www.rust-lang.org/tools/install) for development.
+
+You'll also need [Insta](https://insta.rs/docs/) to update snapshot tests:
+
+```shell
+cargo install cargo-insta
+```
+
+### Development
+
+After cloning the repository, run Ruff locally with:
+
+```shell
+cargo run -p ruff_cli -- check /path/to/file.py --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:
+
+```shell
+cargo fmt  # Auto-formatting...
+cargo clippy --fix --workspace --all-targets --all-features  # Linting...
+cargo test  # 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.
+
+### Project Structure
+
+Ruff is structured as a monorepo with a [flat crate structure](https://matklad.github.io/2021/08/22/large-rust-workspaces.html),
+such that all crates are contained in a flat `crates` directory.
+
+The vast majority of the code, including all lint rules, lives in the `ruff` crate (located at
+`crates/ruff`). As a contributor, that's the crate that'll be most relevant to you.
+
+At time of writing, the repository includes the following crates:
+
+- `crates/ruff`: library crate containing all lint rules and the core logic for running them.
+- `crates/ruff_cli`: binary crate containing Ruff's command-line interface.
+- `crates/ruff_dev`: binary crate containing utilities used in the development of Ruff itself (e.g.,
+  `cargo dev generate-all`).
+- `crates/ruff_macros`: library crate containing macros used by Ruff.
+- `crates/ruff_python`: library crate implementing Python-specific functionality (e.g., lists of
+  standard library modules by version).
+- `crates/flake8_to_ruff`: binary crate for generating Ruff configuration from Flake8 configuration.
+
+### Example: Adding a new lint rule
+
+At a high level, the steps involved in adding a new lint rule are as follows:
+
+1. Determine a name for the new rule as per our [rule naming convention](#rule-naming-convention).
+
+1. Create a file for your rule (e.g., `crates/ruff/src/rules/flake8_bugbear/rules/abstract_base_class.rs`).
+
+1. In that file, define a violation struct. You can grep for `#[violation]` to see examples.
+
+1. Map the violation struct to a rule code in `crates/ruff/src/codes.rs` (e.g., `E402`).
+
+1. Define the logic for triggering the violation in `crates/ruff/src/checkers/ast/mod.rs` (for
+   AST-based checks), `crates/ruff/src/checkers/tokens.rs` (for token-based checks),
+   `crates/ruff/src/checkers/lines.rs` (for text-based checks), or
+   `crates/ruff/src/checkers/filesystem.rs` (for filesystem-based checks).
+
+1. Add proper [testing](#rule-testing-fixtures-and-snapshots) for your rule.
+
+1. Update the generated files (documentation and generated code).
+
+To define the violation, start by creating a dedicated file for your rule under the appropriate
+rule linter (e.g., `crates/ruff/src/rules/flake8_bugbear/rules/abstract_base_class.rs`). That file should
+contain a struct defined via `#[violation]`, along with a function that creates the violation
+based on any required inputs.
+
+To trigger the violation, you'll likely want to augment the logic in `crates/ruff/src/checkers/ast.rs`,
+which defines the Python AST visitor, responsible for iterating over the abstract syntax tree and
+collecting diagnostics 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.
+
+Once you're satisfied with your code, add tests for your rule. See [rule testing](#rule-testing-fixtures-and-snapshots)
+for more details.
+
+Finally, regenerate the documentation and generated code with `cargo dev generate-all`.
+
+#### Rule naming convention
+
+The rule name should make sense when read as "allow _rule-name_" or "allow _rule-name_ items".
+
+This implies that rule names:
+
+- should state the bad thing being checked for
+
+- should not contain instructions on what you should use instead
+  (these belong in the rule documentation and the `autofix_title` for rules that have autofix)
+
+When re-implementing rules from other linters, this convention is given more importance than
+preserving the original rule name.
+
+#### Rule testing: fixtures and snapshots
+
+To test rules, Ruff uses snapshots of Ruff's output for a given file (fixture). Generally, there
+will be one file per rule (e.g., `E402.py`), and each file will contain all necessary examples of
+both violations and non-violations. `cargo insta review` will generate a snapshot file containing
+Ruff's output for each fixture, which you can then commit alongside your changes.
+
+Once you've completed the code for the rule itself, you can define tests with the following steps:
+
+1. Add a Python file to `crates/ruff/resources/test/fixtures/[linter]` that contains the code you
+   want to test. The file name should match the rule name (e.g., `E402.py`), and it should include
+   examples of both violations and non-violations.
+
+1. Run Ruff locally against your file and verify the output is as expected. Once you're satisfied
+   with the output (you see the violations you expect, and no others), proceed to the next step.
+   For example, if you're adding a new rule named `E402`, you would run:
+
+   ```shell
+   cargo run -p ruff_cli -- check crates/ruff/resources/test/fixtures/pycodestyle/E402.py --no-cache
+   ```
+
+1. Add the test to the relevant `crates/ruff/src/rules/[linter]/mod.rs` file. If you're contributing
+   a rule to a pre-existing set, you should be able to find a similar example to pattern-match
+   against. If you're adding a new linter, you'll need to create a new `mod.rs` file (see,
+   e.g., `crates/ruff/src/rules/flake8_bugbear/mod.rs`)
+
+1. Run `cargo test`. Your test will fail, but you'll be prompted to follow-up
+   with `cargo insta review`. Run `cargo insta review`, review and accept the generated snapshot,
+   then commit the snapshot file alongside the rest of your changes.
+
+1. Run `cargo test` again to ensure that your test passes.
+
+### Example: Adding a new configuration option
+
+Ruff's user-facing settings live in a few different places.
+
+First, the command-line options are defined via the `Cli` struct in `crates/ruff/src/cli.rs`.
+
+Second, the `pyproject.toml` options are defined in `crates/ruff/src/settings/options.rs` (via the
+`Options` struct), `crates/ruff/src/settings/configuration.rs` (via the `Configuration` struct), and
+`crates/ruff/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.,
+`crates/ruff/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 `crates/ruff/src/flake8_to_ruff/converter.rs`.
+
+Finally, regenerate the documentation and generated code with `cargo dev generate-all`.
+
+## MkDocs
+
+To preview any changes to the documentation locally:
+
+1. Install the [Rust toolchain](https://www.rust-lang.org/tools/install).
+
+1. Install MkDocs and Material for MkDocs with:
+
+   ```shell
+   pip install -r docs/requirements.txt
+   ```
+
+1. Generate the MkDocs site with:
+
+   ```shell
+   python scripts/generate_mkdocs.py
+   ```
+
+1. Run the development server with:
+
+   ```shell
+   mkdocs serve
+   ```
+
+The documentation should then be available locally at
+[http://127.0.0.1:8000/docs/](http://127.0.0.1:8000/docs/).
+
+## Release Process
+
+As of now, Ruff has an ad hoc release process: releases are cut with high frequency via GitHub
+Actions, which automatically generates the appropriate wheels across architectures and publishes
+them to [PyPI](https://pypi.org/project/ruff/).
+
+Ruff follows the [semver](https://semver.org/) versioning standard. However, as pre-1.0 software,
+even patch releases may contain [non-backwards-compatible changes](https://semver.org/#spec-item-4).
+
+## Ecosystem CI
+
+GitHub Actions will run your changes against a number of real-world projects from GitHub and
+report on any diagnostic differences. You can also run those checks locally via:
+
+```shell
+python scripts/check_ecosystem.py path/to/your/ruff path/to/older/ruff
+```
+
+You can also run the Ecosystem CI check in a Docker container across a larger set of projects by
+downloading the [`known-github-tomls.json`](https://github.com/akx/ruff-usage-aggregate/blob/master/data/known-github-tomls.jsonl)
+as `github_search.jsonl` and following the instructions in [scripts/Dockerfile.ecosystem](https://github.com/charliermarsh/ruff/blob/main/scripts/Dockerfile.ecosystem).
+Note that this check will take a while to run.
+
+## Benchmarks
+
+First, clone [CPython](https://github.com/python/cpython). It's a large and diverse Python codebase,
+which makes it a good target for benchmarking.
+
+```shell
+git clone --branch 3.10 https://github.com/python/cpython.git crates/ruff/resources/test/cpython
+```
+
+To benchmark the release build:
+
+```shell
+cargo build --release && hyperfine --ignore-failure --warmup 10 \
+  "./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache" \
+  "./target/release/ruff ./crates/ruff/resources/test/cpython/"
+
+Benchmark 1: ./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache
+  Time (mean ± σ):     293.8 ms ±   3.2 ms    [User: 2384.6 ms, System: 90.3 ms]
+  Range (min … max):   289.9 ms … 301.6 ms    10 runs
+
+  Warning: Ignoring non-zero exit code.
+
+Benchmark 2: ./target/release/ruff ./crates/ruff/resources/test/cpython/
+  Time (mean ± σ):      48.0 ms ±   3.1 ms    [User: 65.2 ms, System: 124.7 ms]
+  Range (min … max):    45.0 ms …  66.7 ms    62 runs
+
+  Warning: Ignoring non-zero exit code.
+
+Summary
+  './target/release/ruff ./crates/ruff/resources/test/cpython/' ran
+    6.12 ± 0.41 times faster than './target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache'
+```
+
+To benchmark against the ecosystem's existing tools:
+
+```shell
+hyperfine --ignore-failure --warmup 5 \
+  "./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache" \
+  "pyflakes crates/ruff/resources/test/cpython" \
+  "autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython" \
+  "pycodestyle crates/ruff/resources/test/cpython" \
+  "flake8 crates/ruff/resources/test/cpython"
+
+Benchmark 1: ./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache
+  Time (mean ± σ):     294.3 ms ±   3.3 ms    [User: 2467.5 ms, System: 89.6 ms]
+  Range (min … max):   291.1 ms … 302.8 ms    10 runs
+
+  Warning: Ignoring non-zero exit code.
+
+Benchmark 2: pyflakes crates/ruff/resources/test/cpython
+  Time (mean ± σ):     15.786 s ±  0.143 s    [User: 15.560 s, System: 0.214 s]
+  Range (min … max):   15.640 s … 16.157 s    10 runs
+
+  Warning: Ignoring non-zero exit code.
+
+Benchmark 3: autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython
+  Time (mean ± σ):      6.175 s ±  0.169 s    [User: 54.102 s, System: 1.057 s]
+  Range (min … max):    5.950 s …  6.391 s    10 runs
+
+Benchmark 4: pycodestyle crates/ruff/resources/test/cpython
+  Time (mean ± σ):     46.921 s ±  0.508 s    [User: 46.699 s, System: 0.202 s]
+  Range (min … max):   46.171 s … 47.863 s    10 runs
+
+  Warning: Ignoring non-zero exit code.
+
+Benchmark 5: flake8 crates/ruff/resources/test/cpython
+  Time (mean ± σ):     12.260 s ±  0.321 s    [User: 102.934 s, System: 1.230 s]
+  Range (min … max):   11.848 s … 12.933 s    10 runs
+
+  Warning: Ignoring non-zero exit code.
+
+Summary
+  './target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache' ran
+   20.98 ± 0.62 times faster than 'autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython'
+   41.66 ± 1.18 times faster than 'flake8 crates/ruff/resources/test/cpython'
+   53.64 ± 0.77 times faster than 'pyflakes crates/ruff/resources/test/cpython'
+  159.43 ± 2.48 times faster than 'pycodestyle crates/ruff/resources/test/cpython'
+```
+
+You can run `poetry install` from `./scripts` to create a working environment for the above. All
+reported benchmarks were computed using the versions specified by `./scripts/pyproject.toml`
+on Python 3.11.
+
+To benchmark Pylint, remove the following files from the CPython repository:
+
+```shell
+rm Lib/test/bad_coding.py \
+  Lib/test/bad_coding2.py \
+  Lib/test/bad_getattr.py \
+  Lib/test/bad_getattr2.py \
+  Lib/test/bad_getattr3.py \
+  Lib/test/badcert.pem \
+  Lib/test/badkey.pem \
+  Lib/test/badsyntax_3131.py \
+  Lib/test/badsyntax_future10.py \
+  Lib/test/badsyntax_future3.py \
+  Lib/test/badsyntax_future4.py \
+  Lib/test/badsyntax_future5.py \
+  Lib/test/badsyntax_future6.py \
+  Lib/test/badsyntax_future7.py \
+  Lib/test/badsyntax_future8.py \
+  Lib/test/badsyntax_future9.py \
+  Lib/test/badsyntax_pep3120.py \
+  Lib/test/test_asyncio/test_runners.py \
+  Lib/test/test_copy.py \
+  Lib/test/test_inspect.py \
+  Lib/test/test_typing.py
+```
+
+Then, from `crates/ruff/resources/test/cpython`, run: `time pylint -j 0 -E $(git ls-files '*.py')`. This
+will execute Pylint with maximum parallelism and only report errors.
+
+To benchmark Pyupgrade, run the following from `crates/ruff/resources/test/cpython`:
+
+```shell
+hyperfine --ignore-failure --warmup 5 --prepare "git reset --hard HEAD" \
+  "find . -type f -name \"*.py\" | xargs -P 0 pyupgrade --py311-plus"
+
+Benchmark 1: find . -type f -name "*.py" | xargs -P 0 pyupgrade --py311-plus
+  Time (mean ± σ):     30.119 s ±  0.195 s    [User: 28.638 s, System: 0.390 s]
+  Range (min … max):   29.813 s … 30.356 s    10 runs
+```

Cargo.toml

@@ -1,44 +1,72 @@
-[package]
-name = "ruff"
-version = "0.0.34"
+[workspace]
+members = ["crates/*"]
+
+[workspace.package]
 edition = "2021"
+rust-version = "1.70"
+homepage = "https://beta.ruff.rs/docs/"
+documentation = "https://beta.ruff.rs/docs/"
+repository = "https://github.com/charliermarsh/ruff"
+authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 
-[lib]
-name = "ruff"
-
-[dependencies]
-anyhow = { version = "1.0.60" }
-bincode = { version = "1.3.3" }
-cacache = { version = "10.0.1" }
-chrono = { version = "0.4.21" }
-clap = { version = "3.2.16", features = ["derive"] }
-clearscreen = { version = "1.0.10" }
+[workspace.dependencies]
+anyhow = { version = "1.0.69" }
+bitflags = { version = "2.3.1" }
+chrono = { version = "0.4.23", default-features = false, features = ["clock"] }
+clap = { version = "4.1.8", features = ["derive"] }
 colored = { version = "2.0.0" }
-common-path = { version = "1.0.0" }
-dirs = { version = "4.0.0" }
-fern = { version = "0.6.1" }
-filetime = { version = "0.2.17" }
-glob = { version = "0.3.0" }
-itertools = "0.10.3"
-lazy_static = "1.4.0"
+filetime = { version = "0.2.20" }
+glob = { version = "0.3.1" }
+globset = { version = "0.4.10" }
+ignore = { version = "0.4.20" }
+insta = { version = "1.28.0" }
+is-macro = { version = "0.2.2" }
+itertools = { version = "0.10.5" }
+libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "80e4c1399f95e5beb532fdd1e209ad2dbb470438" }
 log = { version = "0.4.17" }
-notify = { version = "4.0.17" }
-once_cell = { version = "1.13.1" }
-rayon = { version = "1.5.3" }
-regex = { version = "1.6.0" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/charliermarsh/RustPython.git", rev = "7d21c6923a506e79cc041708d83cef925efd33f4" }
-serde = { version = "1.0.143", features = ["derive"] }
-serde_json = { version = "1.0.83" }
-toml = { version = "0.5.9" }
-update-informer = { version = "0.5.0", default_features = false, features = ["pypi"], optional = true }
-walkdir = { version = "2.3.2" }
-
-[features]
-default = ["update-informer"]
-update-informer = ["dep:update-informer"]
+memchr = "2.5.0"
+nohash-hasher = { version = "0.2.0" }
+num-bigint = { version = "0.4.3" }
+num-traits = { version = "0.2.15" }
+once_cell = { version = "1.17.1" }
+path-absolutize = { version = "3.0.14" }
+proc-macro2 = { version = "1.0.51" }
+quote = { version = "1.0.23" }
+regex = { version = "1.7.1" }
+rustc-hash = { version = "1.1.0" }
+ruff_text_size = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "7a3eedbf6fb4ea7068a1bf7fe0e97e963ea95ffd" }
+rustpython-ast = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "7a3eedbf6fb4ea7068a1bf7fe0e97e963ea95ffd", default-features = false, features = ["all-nodes-with-ranges"]}
+rustpython-format = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "7a3eedbf6fb4ea7068a1bf7fe0e97e963ea95ffd" }
+rustpython-literal = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "7a3eedbf6fb4ea7068a1bf7fe0e97e963ea95ffd" }
+rustpython-parser = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "7a3eedbf6fb4ea7068a1bf7fe0e97e963ea95ffd", default-features = false, features = ["full-lexer", "all-nodes-with-ranges"] }
+schemars = { version = "0.8.12" }
+serde = { version = "1.0.152", features = ["derive"] }
+serde_json = { version = "1.0.93", features = ["preserve_order"] }
+shellexpand = { version = "3.0.0" }
+similar = { version = "2.2.1" }
+smallvec = { version = "1.10.0" }
+strum = { version = "0.24.1", features = ["strum_macros"] }
+strum_macros = { version = "0.24.3" }
+syn = { version = "2.0.15" }
+test-case = { version = "3.0.0" }
+toml = { version = "0.7.2" }
 
 [profile.release]
-panic = "abort"
-lto = "thin"
-codegen-units = 1
+lto = "fat"
+
+[profile.dev.package.insta]
 opt-level = 3
+
+[profile.dev.package.similar]
+opt-level = 3
+
+# Reduce complexity of a parser function that would trigger a locals limit in a wasm tool.
+# https://github.com/bytecodealliance/wasm-tools/blob/b5c3d98e40590512a3b12470ef358d5c7b983b15/crates/wasmparser/src/limits.rs#L29
+[profile.dev.package.rustpython-parser]
+opt-level = 1
+
+# Use the `--profile release-debug` flag to show symbols in release mode.
+# e.g. `cargo build --profile release-debug`
+[profile.release-debug]
+inherits = "release"
+debug = 1

README.md

@@ -1,12 +1,23 @@
-# ruff
+<!-- Begin section: Overview -->
 
+# Ruff
+
+[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json)](https://github.com/charliermarsh/ruff)
+[![image](https://img.shields.io/pypi/v/ruff.svg)](https://pypi.python.org/pypi/ruff)
+[![image](https://img.shields.io/pypi/l/ruff.svg)](https://pypi.python.org/pypi/ruff)
+[![image](https://img.shields.io/pypi/pyversions/ruff.svg)](https://pypi.python.org/pypi/ruff)
 [![Actions status](https://github.com/charliermarsh/ruff/workflows/CI/badge.svg)](https://github.com/charliermarsh/ruff/actions)
-[![PyPI version](https://badge.fury.io/py/ruff.svg)](https://badge.fury.io/py/ruff)
+
+[**Discord**](https://discord.gg/c9MhzV8aU5) | [**Docs**](https://beta.ruff.rs/docs/) | [**Playground**](https://play.ruff.rs/)
 
 An extremely fast Python linter, written in Rust.
 
 <p align="center">
-  <img alt="Bar chart with benchmark results" src="https://user-images.githubusercontent.com/1309177/187504482-6d9df992-a81d-4e86-9f6a-d958741c8182.svg">
+  <picture align="center">
+    <source media="(prefers-color-scheme: dark)" srcset="https://user-images.githubusercontent.com/1309177/212613422-7faaf278-706b-4294-ad92-236ffcab3430.svg">
+    <source media="(prefers-color-scheme: light)" srcset="https://user-images.githubusercontent.com/1309177/212613257-5f4bca12-6d6b-4c79-9bac-51a4c6d08928.svg">
+    <img alt="Shows a bar chart with benchmark results." src="https://user-images.githubusercontent.com/1309177/212613257-5f4bca12-6d6b-4c79-9bac-51a4c6d08928.svg">
+  </picture>
 </p>
 
 <p align="center">
@@ -15,332 +26,416 @@ An extremely fast Python linter, written in Rust.
 
 - ⚡️ 10-100x faster than existing linters
 - 🐍 Installable via `pip`
-- 🤝 Python 3.10 compatibility
 - 🛠️ `pyproject.toml` support
-- 📦 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#caching)-inspired cache support
-- 🔧 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#caching)-inspired `--fix` support
-- 👀 [TypeScript](https://www.typescriptlang.org/docs/handbook/configuring-watch.html)-inspired `--watch` support
+- 🤝 Python 3.11 compatibility
+- 📦 Built-in caching, to avoid re-analyzing unchanged files
+- 🔧 Autofix support, for automatic error correction (e.g., automatically remove unused imports)
+- 📏 Over [500 built-in rules](https://beta.ruff.rs/docs/rules/)
+- ⚖️ [Near-parity](https://beta.ruff.rs/docs/faq/#how-does-ruff-compare-to-flake8) with the
+  built-in Flake8 rule set
+- 🔌 Native re-implementations of dozens of Flake8 plugins, like flake8-bugbear
+- ⌨️ First-party editor integrations for [VS Code](https://github.com/astral-sh/ruff-vscode) and [more](https://github.com/astral-sh/ruff-lsp)
+- 🌎 Monorepo-friendly, with [hierarchical and cascading configuration](https://beta.ruff.rs/docs/configuration/#pyprojecttoml-discovery)
 
-_ruff is a proof-of-concept and not yet intended for production use. It supports only a small subset
-of the Flake8 rules, and may crash on your codebase._
+Ruff aims to be orders of magnitude faster than alternative tools while integrating more
+functionality behind a single, common interface.
 
-Read the [launch blog post](https://notes.crmarsh.com/python-tooling-could-be-much-much-faster).
+Ruff can be used to replace [Flake8](https://pypi.org/project/flake8/) (plus dozens of plugins),
+[isort](https://pypi.org/project/isort/), [pydocstyle](https://pypi.org/project/pydocstyle/),
+[yesqa](https://github.com/asottile/yesqa), [eradicate](https://pypi.org/project/eradicate/),
+[pyupgrade](https://pypi.org/project/pyupgrade/), and [autoflake](https://pypi.org/project/autoflake/),
+all while executing tens or hundreds of times faster than any individual tool.
 
-## Installation and usage
+Ruff is extremely actively developed and used in major open-source projects like:
+
+- [Apache Airflow](https://github.com/apache/airflow)
+- [FastAPI](https://github.com/tiangolo/fastapi)
+- [Hugging Face](https://github.com/huggingface/transformers)
+- [Pandas](https://github.com/pandas-dev/pandas)
+- [SciPy](https://github.com/scipy/scipy)
+
+...and many more.
+
+Ruff is backed by [Astral](https://astral.sh). Read the [launch post](https://astral.sh/blog/announcing-astral-the-company-behind-ruff),
+or the original [project announcement](https://notes.crmarsh.com/python-tooling-could-be-much-much-faster).
+
+## Testimonials
+
+[**Sebastián Ramírez**](https://twitter.com/tiangolo/status/1591912354882764802), creator
+of [FastAPI](https://github.com/tiangolo/fastapi):
+
+> Ruff is so fast that sometimes I add an intentional bug in the code just to confirm it's actually
+> running and checking the code.
+
+[**Nick Schrock**](https://twitter.com/schrockn/status/1612615862904827904), founder of [Elementl](https://www.elementl.com/),
+co-creator of [GraphQL](https://graphql.org/):
+
+> Why is Ruff a gamechanger? Primarily because it is nearly 1000x faster. Literally. Not a typo. On
+> our largest module (dagster itself, 250k LOC) pylint takes about 2.5 minutes, parallelized across 4
+> cores on my M1. Running ruff against our _entire_ codebase takes .4 seconds.
+
+[**Bryan Van de Ven**](https://github.com/bokeh/bokeh/pull/12605), co-creator
+of [Bokeh](https://github.com/bokeh/bokeh/), original author
+of [Conda](https://docs.conda.io/en/latest/):
+
+> Ruff is ~150-200x faster than flake8 on my machine, scanning the whole repo takes ~0.2s instead of
+> ~20s. This is an enormous quality of life improvement for local dev. It's fast enough that I added
+> it as an actual commit hook, which is terrific.
+
+[**Timothy Crosley**](https://twitter.com/timothycrosley/status/1606420868514877440),
+creator of [isort](https://github.com/PyCQA/isort):
+
+> Just switched my first project to Ruff. Only one downside so far: it's so fast I couldn't believe
+> it was working till I intentionally introduced some errors.
+
+[**Tim Abbott**](https://github.com/charliermarsh/ruff/issues/465#issuecomment-1317400028), lead
+developer of [Zulip](https://github.com/zulip/zulip):
+
+> This is just ridiculously fast... `ruff` is amazing.
+
+<!-- End section: Overview -->
+
+## Table of Contents
+
+For more, see the [documentation](https://beta.ruff.rs/docs/).
+
+1. [Getting Started](#getting-started)
+1. [Configuration](#configuration)
+1. [Rules](#rules)
+1. [Contributing](#contributing)
+1. [Support](#support)
+1. [Acknowledgements](#acknowledgements)
+1. [Who's Using Ruff?](#whos-using-ruff)
+1. [License](#license)
+
+## Getting Started
+
+For more, see the [documentation](https://beta.ruff.rs/docs/).
 
 ### Installation
 
-Available as [ruff](https://pypi.org/project/ruff/) on PyPI:
+Ruff is available as [`ruff`](https://pypi.org/project/ruff/) on PyPI:
 
 ```shell
 pip install ruff
 ```
 
+You can also install Ruff via [Homebrew](https://formulae.brew.sh/formula/ruff), [Conda](https://anaconda.org/conda-forge/ruff),
+and with [a variety of other package managers](https://beta.ruff.rs/docs/installation/).
+
 ### Usage
 
-To run ruff, try any of the following:
+To run Ruff, try any of the following:
 
 ```shell
-ruff path/to/code/to/check.py
-ruff path/to/code/
-ruff path/to/code/*.py
+ruff check .                        # Lint all files in the current directory (and any subdirectories)
+ruff check path/to/code/            # Lint all files in `/path/to/code` (and any subdirectories)
+ruff check path/to/code/*.py        # Lint all `.py` files in `/path/to/code`
+ruff check path/to/code/to/file.py  # Lint `file.py`
 ```
 
-You can run ruff in `--watch` mode to automatically re-run on-change:
-
-```shell
-ruff path/to/code/ --watch
-```
-
-ruff also works with [Pre-Commit](https://pre-commit.com) (requires Cargo on system):
+Ruff can also be used as a [pre-commit](https://pre-commit.com) hook:
 
 ```yaml
-repos:
-- repo: https://github.com/charliermarsh/ruff
-  rev: v0.0.34
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  # Ruff version.
+  rev: v0.0.271
   hooks:
-    - id: lint
+    - id: ruff
 ```
 
-## Configuration
+Ruff can also be used as a [VS Code extension](https://github.com/astral-sh/ruff-vscode) or
+alongside any other editor through the [Ruff LSP](https://github.com/astral-sh/ruff-lsp).
 
-ruff is configurable both via `pyproject.toml` and the command line.
+Ruff can also be used as a [GitHub Action](https://github.com/features/actions) via
+[`ruff-action`](https://github.com/chartboost/ruff-action):
 
-For example, you could configure ruff to only enforce a subset of rules with:
+```yaml
+name: Ruff
+on: [ push, pull_request ]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: chartboost/ruff-action@v1
+```
+
+### Configuration
+
+Ruff can be configured through a `pyproject.toml`, `ruff.toml`, or `.ruff.toml` file (see:
+[_Configuration_](https://beta.ruff.rs/docs/configuration/), or [_Settings_](https://beta.ruff.rs/docs/settings/)
+for a complete list of all configuration options).
+
+If left unspecified, the default configuration is equivalent to:
 
 ```toml
 [tool.ruff]
-line-length = 88
-select = [
-    "F401",
-    "F403",
+# Enable pycodestyle (`E`) and Pyflakes (`F`) codes by default.
+select = ["E", "F"]
+ignore = []
+
+# Allow autofix for all enabled rules (when `--fix`) is provided.
+fixable = ["A", "B", "C", "D", "E", "F", "G", "I", "N", "Q", "S", "T", "W", "ANN", "ARG", "BLE", "COM", "DJ", "DTZ", "EM", "ERA", "EXE", "FBT", "ICN", "INP", "ISC", "NPY", "PD", "PGH", "PIE", "PL", "PT", "PTH", "PYI", "RET", "RSE", "RUF", "SIM", "SLF", "TCH", "TID", "TRY", "UP", "YTT"]
+unfixable = []
+
+# Exclude a variety of commonly ignored directories.
+exclude = [
+    ".bzr",
+    ".direnv",
+    ".eggs",
+    ".git",
+    ".git-rewrite",
+    ".hg",
+    ".mypy_cache",
+    ".nox",
+    ".pants.d",
+    ".pytype",
+    ".ruff_cache",
+    ".svn",
+    ".tox",
+    ".venv",
+    "__pypackages__",
+    "_build",
+    "buck-out",
+    "build",
+    "dist",
+    "node_modules",
+    "venv",
 ]
+
+# Same as Black.
+line-length = 88
+
+# Allow unused variables when underscore-prefixed.
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+# Assume Python 3.10.
+target-version = "py310"
+
+[tool.ruff.mccabe]
+# Unlike Flake8, default to a complexity level of 10.
+max-complexity = 10
 ```
 
-Alternatively, on the command-line:
+Some configuration options can be provided via the command-line, such as those related to
+rule enablement and disablement, file discovery, logging level, and more:
 
 ```shell
-ruff path/to/code/ --select F401 F403
+ruff check path/to/code/ --select F401 --select F403 --quiet
 ```
 
-See `ruff --help` for more:
-
-```shell
-ruff (v0.0.34)
-An extremely fast Python linter.
-
-USAGE:
-    ruff [OPTIONS] <FILES>...
-
-ARGS:
-    <FILES>...
-
-OPTIONS:
-    -e, --exit-zero               Exit with status code "0", even upon detecting errors
-        --exclude <EXCLUDE>...    List of file and/or directory patterns to exclude from checks
-    -f, --fix                     Attempt to automatically fix lint errors
-    -h, --help                    Print help information
-        --ignore <IGNORE>...      List of error codes to ignore
-    -n, --no-cache                Disable cache reads
-    -q, --quiet                   Disable all logging (but still exit with status code "1" upon
-                                  detecting errors)
-        --select <SELECT>...      List of error codes to enable
-    -v, --verbose                 Enable verbose logging
-    -w, --watch                   Run in watch mode by re-running whenever files change
-```
-
-### Compatibility with Black
-
-ruff is intended to be compatible with [Black](https://github.com/psf/black), and should be
-compatible out-of-the-box as long as the `line-length` setting is consistent between the two.
-
-As a project, ruff is designed to be used alongside Black and, as such, will defer implementing
-lint rules that are obviated by Black (e.g., stylistic rules).
-
-### Parity with Flake8
-
-ruff's goal is to achieve feature-parity with Flake8 when used (1) without any plugins,
-(2) alongside Black, and (3) on Python 3 code. (Using Black obviates the need for many of Flake8's
-stylistic checks; limiting to Python 3 obviates the need for certain compatibility checks.)
-
-Under those conditions, Flake8 implements about 58 rules, give or take. At time of writing, ruff
-implements 31 rules. (Note that these 31 rules likely cover a disproportionate share of errors:
-unused imports, undefined variables, etc.)
-
-Of the unimplemented rules, ruff is missing:
-
-- 15 rules related to string `.format` calls.
-- 6 rules related to misplaced `yield`, `break`, and `return` statements.
-- 3 rules related to syntax errors in doctests and annotations.
-- 2 rules related to redefining unused names.
-
-...along with a variety of others that don't fit neatly into any specific category.
-
-Beyond rule-set parity, ruff suffers from the following limitations vis-à-vis Flake8:
-
-1. Flake8 supports a wider range of `noqa` patterns, such as per-file ignores defined in `.flake8`.
-2. Flake8 has a plugin architecture and supports writing custom lint rules.
-3. ruff does not yet support parenthesized context managers.
+See `ruff help` for more on Ruff's top-level commands, or `ruff help check` for more on the
+linting command.
 
 ## Rules
 
-| Code | Name | Message |
-| ---- | ----- | ------- |
-| E402 | ModuleImportNotAtTopOfFile | Module level import not at top of file |
-| E501 | LineTooLong | Line too long |
-| E711 | NoneComparison | Comparison to `None` should be `cond is None` |
-| E712 | TrueFalseComparison | Comparison to `True` should be `cond is True` |
-| E713 | NotInTest | Test for membership should be `not in` |
-| E714 | NotIsTest | Test for object identity should be `is not` |
-| E731 | DoNotAssignLambda | Do not assign a lambda expression, use a def |
-| E741 | AmbiguousVariableName | ambiguous variable name '...' |
-| E902 | IOError | No such file or directory: `...` |
-| F401 | UnusedImport | `...` imported but unused |
-| F403 | ImportStarUsage | Unable to detect undefined names |
-| F404 | LateFutureImport | from __future__ imports must occur at the beginning of the file |
-| F407 | FutureFeatureNotDefined | future feature '...' is not defined |
-| F541 | FStringMissingPlaceholders | f-string without any placeholders |
-| F601 | MultiValueRepeatedKeyLiteral | Dictionary key literal repeated |
-| F602 | MultiValueRepeatedKeyVariable | Dictionary key `...` repeated |
-| F621 | TooManyExpressionsInStarredAssignment | too many expressions in star-unpacking assignment |
-| F622 | TwoStarredExpressions | two starred expressions in assignment |
-| F631 | AssertTuple | Assert test is a non-empty tuple, which is always `True` |
-| F634 | IfTuple | If test is a tuple, which is always `True` |
-| F704 | YieldOutsideFunction | a `yield` or `yield from` statement outside of a function/method |
-| F706 | ReturnOutsideFunction | a `return` statement outside of a function/method |
-| F707 | DefaultExceptNotLast | an `except:` block as not the last exception handler |
-| F821 | UndefinedName | Undefined name `...` |
-| F822 | UndefinedExport | Undefined name `...` in `__all__` |
-| F823 | UndefinedLocal | Local variable `...` referenced before assignment |
-| F831 | DuplicateArgumentName | Duplicate argument name in function definition |
-| F841 | UnusedVariable | Local variable `...` is assigned to but never used |
-| F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` |
-| R001 | UselessObjectInheritance | Class `...` inherits from object |
-| R002 | NoAssertEquals | `assertEquals` is deprecated, use `assertEqual` instead |
+<!-- Begin section: Rules -->
 
-## Development
+**Ruff supports over 500 lint rules**, many of which are inspired by popular tools like Flake8,
+isort, pyupgrade, and others. Regardless of the rule's origin, Ruff re-implements every rule in
+Rust as a first-party feature.
 
-ruff is written in Rust (1.63.0). You'll need to install the [Rust toolchain](https://www.rust-lang.org/tools/install)
-for development.
+By default, Ruff enables Flake8's `E` and `F` rules. Ruff supports all rules from the `F` category,
+and a [subset](https://beta.ruff.rs/docs/rules/#error-e) of the `E` category, omitting those
+stylistic rules made obsolete by the use of an autoformatter, like
+[Black](https://github.com/psf/black).
 
-Assuming you have `cargo` installed, you can run:
+If you're just getting started with Ruff, **the default rule set is a great place to start**: it
+catches a wide variety of common errors (like unused imports) with zero configuration.
 
-```shell
-cargo run resources/test/fixtures
-cargo fmt
-cargo clippy
-cargo test
+<!-- End section: Rules -->
+
+Beyond the defaults, Ruff re-implements some of the most popular Flake8 plugins and related code
+quality tools, including:
+
+- [autoflake](https://pypi.org/project/autoflake/)
+- [eradicate](https://pypi.org/project/eradicate/)
+- [flake8-2020](https://pypi.org/project/flake8-2020/)
+- [flake8-annotations](https://pypi.org/project/flake8-annotations/)
+- [flake8-async](https://pypi.org/project/flake8-async)
+- [flake8-bandit](https://pypi.org/project/flake8-bandit/) ([#1646](https://github.com/charliermarsh/ruff/issues/1646))
+- [flake8-blind-except](https://pypi.org/project/flake8-blind-except/)
+- [flake8-boolean-trap](https://pypi.org/project/flake8-boolean-trap/)
+- [flake8-bugbear](https://pypi.org/project/flake8-bugbear/)
+- [flake8-builtins](https://pypi.org/project/flake8-builtins/)
+- [flake8-commas](https://pypi.org/project/flake8-commas/)
+- [flake8-comprehensions](https://pypi.org/project/flake8-comprehensions/)
+- [flake8-datetimez](https://pypi.org/project/flake8-datetimez/)
+- [flake8-debugger](https://pypi.org/project/flake8-debugger/)
+- [flake8-django](https://pypi.org/project/flake8-django/)
+- [flake8-docstrings](https://pypi.org/project/flake8-docstrings/)
+- [flake8-eradicate](https://pypi.org/project/flake8-eradicate/)
+- [flake8-errmsg](https://pypi.org/project/flake8-errmsg/)
+- [flake8-executable](https://pypi.org/project/flake8-executable/)
+- [flake8-future-annotations](https://pypi.org/project/flake8-future-annotations/)
+- [flake8-gettext](https://pypi.org/project/flake8-gettext/)
+- [flake8-implicit-str-concat](https://pypi.org/project/flake8-implicit-str-concat/)
+- [flake8-import-conventions](https://github.com/joaopalmeiro/flake8-import-conventions)
+- [flake8-logging-format](https://pypi.org/project/flake8-logging-format/)
+- [flake8-no-pep420](https://pypi.org/project/flake8-no-pep420)
+- [flake8-pie](https://pypi.org/project/flake8-pie/)
+- [flake8-print](https://pypi.org/project/flake8-print/)
+- [flake8-pyi](https://pypi.org/project/flake8-pyi/)
+- [flake8-pytest-style](https://pypi.org/project/flake8-pytest-style/)
+- [flake8-quotes](https://pypi.org/project/flake8-quotes/)
+- [flake8-raise](https://pypi.org/project/flake8-raise/)
+- [flake8-return](https://pypi.org/project/flake8-return/)
+- [flake8-self](https://pypi.org/project/flake8-self/)
+- [flake8-simplify](https://pypi.org/project/flake8-simplify/)
+- [flake8-super](https://pypi.org/project/flake8-super/)
+- [flake8-tidy-imports](https://pypi.org/project/flake8-tidy-imports/)
+- [flake8-todos](https://pypi.org/project/flake8-todos/)
+- [flake8-type-checking](https://pypi.org/project/flake8-type-checking/)
+- [flake8-use-pathlib](https://pypi.org/project/flake8-use-pathlib/)
+- [flynt](https://pypi.org/project/flynt/) ([#2102](https://github.com/charliermarsh/ruff/issues/2102))
+- [isort](https://pypi.org/project/isort/)
+- [mccabe](https://pypi.org/project/mccabe/)
+- [pandas-vet](https://pypi.org/project/pandas-vet/)
+- [pep8-naming](https://pypi.org/project/pep8-naming/)
+- [pydocstyle](https://pypi.org/project/pydocstyle/)
+- [pygrep-hooks](https://github.com/pre-commit/pygrep-hooks)
+- [pylint-airflow](https://pypi.org/project/pylint-airflow/)
+- [pyupgrade](https://pypi.org/project/pyupgrade/)
+- [tryceratops](https://pypi.org/project/tryceratops/)
+- [yesqa](https://pypi.org/project/yesqa/)
+
+For a complete enumeration of the supported rules, see [_Rules_](https://beta.ruff.rs/docs/rules/).
+
+## Contributing
+
+Contributions are welcome and highly appreciated. To get started, check out the
+[**contributing guidelines**](https://beta.ruff.rs/docs/contributing/).
+
+You can also join us on [**Discord**](https://discord.gg/c9MhzV8aU5).
+
+## Support
+
+Having trouble? Check out the existing issues on [**GitHub**](https://github.com/charliermarsh/ruff/issues),
+or feel free to [**open a new one**](https://github.com/charliermarsh/ruff/issues/new).
+
+You can also ask for help on [**Discord**](https://discord.gg/c9MhzV8aU5).
+
+## Acknowledgements
+
+Ruff's linter draws on both the APIs and implementation details of many other
+tools in the Python ecosystem, especially [Flake8](https://github.com/PyCQA/flake8), [Pyflakes](https://github.com/PyCQA/pyflakes),
+[pycodestyle](https://github.com/PyCQA/pycodestyle), [pydocstyle](https://github.com/PyCQA/pydocstyle),
+[pyupgrade](https://github.com/asottile/pyupgrade), and [isort](https://github.com/PyCQA/isort).
+
+In some cases, Ruff includes a "direct" Rust port of the corresponding tool.
+We're grateful to the maintainers of these tools for their work, and for all
+the value they've provided to the Python community.
+
+Ruff's autoformatter is built on a fork of Rome's [`rome_formatter`](https://github.com/rome/tools/tree/main/crates/rome_formatter),
+and again draws on both the APIs and implementation details of [Rome](https://github.com/rome/tools),
+[Prettier](https://github.com/prettier/prettier), and [Black](https://github.com/psf/black).
+
+Ruff is also influenced by a number of tools outside the Python ecosystem, like
+[Clippy](https://github.com/rust-lang/rust-clippy) and [ESLint](https://github.com/eslint/eslint).
+
+Ruff is the beneficiary of a large number of [contributors](https://github.com/charliermarsh/ruff/graphs/contributors).
+
+Ruff is released under the MIT license.
+
+## Who's Using Ruff?
+
+Ruff is used by a number of major open-source projects and companies, including:
+
+- Amazon ([AWS SAM](https://github.com/aws/serverless-application-model))
+- [Apache Airflow](https://github.com/apache/airflow)
+- AstraZeneca ([Magnus](https://github.com/AstraZeneca/magnus-core))
+- Benchling ([Refac](https://github.com/benchling/refac))
+- [Babel](https://github.com/python-babel/babel)
+- [Bokeh](https://github.com/bokeh/bokeh)
+- [Cryptography (PyCA)](https://github.com/pyca/cryptography)
+- [DVC](https://github.com/iterative/dvc)
+- [Dagger](https://github.com/dagger/dagger)
+- [Dagster](https://github.com/dagster-io/dagster)
+- [FastAPI](https://github.com/tiangolo/fastapi)
+- [Gradio](https://github.com/gradio-app/gradio)
+- [Great Expectations](https://github.com/great-expectations/great_expectations)
+- Hugging Face ([Transformers](https://github.com/huggingface/transformers),
+  [Datasets](https://github.com/huggingface/datasets),
+  [Diffusers](https://github.com/huggingface/diffusers))
+- [Hatch](https://github.com/pypa/hatch)
+- [Home Assistant](https://github.com/home-assistant/core)
+- [Ibis](https://github.com/ibis-project/ibis)
+- [Jupyter](https://github.com/jupyter-server/jupyter_server)
+- [LangChain](https://github.com/hwchase17/langchain)
+- [LlamaIndex](https://github.com/jerryjliu/llama_index)
+- Matrix ([Synapse](https://github.com/matrix-org/synapse))
+- Meltano ([Meltano CLI](https://github.com/meltano/meltano), [Singer SDK](https://github.com/meltano/sdk))
+- Modern Treasury ([Python SDK](https://github.com/Modern-Treasury/modern-treasury-python-sdk))
+- Mozilla ([Firefox](https://github.com/mozilla/gecko-dev))
+- [MegaLinter](https://github.com/oxsecurity/megalinter)
+- Microsoft ([Semantic Kernel](https://github.com/microsoft/semantic-kernel),
+  [ONNX Runtime](https://github.com/microsoft/onnxruntime),
+  [LightGBM](https://github.com/microsoft/LightGBM))
+- Netflix ([Dispatch](https://github.com/Netflix/dispatch))
+- [Neon](https://github.com/neondatabase/neon)
+- [ONNX](https://github.com/onnx/onnx)
+- [OpenBB](https://github.com/OpenBB-finance/OpenBBTerminal)
+- [PDM](https://github.com/pdm-project/pdm)
+- [PaddlePaddle](https://github.com/PaddlePaddle/Paddle)
+- [Pandas](https://github.com/pandas-dev/pandas)
+- [Poetry](https://github.com/python-poetry/poetry)
+- [Polars](https://github.com/pola-rs/polars)
+- [PostHog](https://github.com/PostHog/posthog)
+- Prefect ([Python SDK](https://github.com/PrefectHQ/prefect), [Marvin](https://github.com/PrefectHQ/marvin))
+- [PyInstaller](https://github.com/pyinstaller/pyinstaller)
+- [PyTorch](https://github.com/pytorch/pytorch)
+- [Pydantic](https://github.com/pydantic/pydantic)
+- [Pylint](https://github.com/PyCQA/pylint)
+- [Pynecone](https://github.com/pynecone-io/pynecone)
+- [Robyn](https://github.com/sansyrox/robyn)
+- Scale AI ([Launch SDK](https://github.com/scaleapi/launch-python-client))
+- Snowflake ([SnowCLI](https://github.com/Snowflake-Labs/snowcli))
+- [Saleor](https://github.com/saleor/saleor)
+- [SciPy](https://github.com/scipy/scipy)
+- [Sphinx](https://github.com/sphinx-doc/sphinx)
+- [Stable Baselines3](https://github.com/DLR-RM/stable-baselines3)
+- [Litestar](https://litestar.dev/)
+- [The Algorithms](https://github.com/TheAlgorithms/Python)
+- [Vega-Altair](https://github.com/altair-viz/altair)
+- WordPress ([Openverse](https://github.com/WordPress/openverse))
+- [ZenML](https://github.com/zenml-io/zenml)
+- [Zulip](https://github.com/zulip/zulip)
+- [build (PyPA)](https://github.com/pypa/build)
+- [cibuildwheel (PyPA)](https://github.com/pypa/cibuildwheel)
+- [delta-rs](https://github.com/delta-io/delta-rs)
+- [featuretools](https://github.com/alteryx/featuretools)
+- [meson-python](https://github.com/mesonbuild/meson-python)
+- [nox](https://github.com/wntrblm/nox)
+
+### Show Your Support
+
+If you're using Ruff, consider adding the Ruff badge to project's `README.md`:
+
+```md
+[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json)](https://github.com/charliermarsh/ruff)
 ```
 
-## Deployment
+...or `README.rst`:
 
-ruff is distributed on [PyPI](https://pypi.org/project/ruff/), and published via [`maturin`](https://github.com/PyO3/maturin).
-
-See: `.github/workflows/release.yaml`.
-
-## Benchmarking
-
-First, clone [CPython](https://github.com/python/cpython). It's a large and diverse Python codebase,
-which makes it a good target for benchmarking.
-
-```shell
-git clone --branch 3.10 https://github.com/python/cpython.git resources/test/cpython
+```rst
+.. image:: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json
+    :target: https://github.com/charliermarsh/ruff
+    :alt: Ruff
 ```
 
-Add this `pyproject.toml` to the CPython directory:
+...or, as HTML:
 
-```toml
-[tool.ruff]
-line-length = 88
-exclude = [
-    "Lib/lib2to3/tests/data/bom.py",
-    "Lib/lib2to3/tests/data/crlf.py",
-    "Lib/lib2to3/tests/data/different_encoding.py",
-    "Lib/lib2to3/tests/data/false_encoding.py",
-    "Lib/lib2to3/tests/data/py2_test_grammar.py",
-    "Lib/test/bad_coding2.py",
-    "Lib/test/badsyntax_3131.py",
-    "Lib/test/badsyntax_pep3120.py",
-    "Lib/test/encoded_modules/module_iso_8859_1.py",
-    "Lib/test/encoded_modules/module_koi8_r.py",
-    "Lib/test/test_fstring.py",
-    "Lib/test/test_grammar.py",
-    "Lib/test/test_importlib/test_util.py",
-    "Lib/test/test_named_expressions.py",
-    "Lib/test/test_patma.py",
-    "Lib/test/test_source_encoding.py",
-    "Tools/c-analyzer/c_parser/parser/_delim.py",
-    "Tools/i18n/pygettext.py",
-    "Tools/test2to3/maintest.py",
-    "Tools/test2to3/setup.py",
-    "Tools/test2to3/test/test_foo.py",
-    "Tools/test2to3/test2to3/hello.py",
-]
-```
-
-Next, to benchmark the release build:
-
-```shell
-cargo build --release
-
-hyperfine --ignore-failure --warmup 1 \
-  "./target/release/ruff ./resources/test/cpython/ --no-cache" \
-  "./target/release/ruff ./resources/test/cpython/"
-
-Benchmark 1: ./target/release/ruff ./resources/test/cpython/ --no-cache
-  Time (mean ± σ):     353.6 ms ±   7.6 ms    [User: 2868.8 ms, System: 171.5 ms]
-  Range (min … max):   344.4 ms … 367.3 ms    10 runs
-
-Benchmark 2: ./target/release/ruff ./resources/test/cpython/
-  Time (mean ± σ):      59.6 ms ±   2.5 ms    [User: 36.4 ms, System: 345.6 ms]
-  Range (min … max):    55.9 ms …  67.0 ms    48 runs
-```
-
-To benchmark against the ecosystem's existing tools:
-
-```shell
-hyperfine --ignore-failure --warmup 5 \
-  "./target/release/ruff ./resources/test/cpython/ --no-cache" \
-  "pylint --recursive=y resources/test/cpython/" \
-  "pyflakes resources/test/cpython" \
-  "autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython" \
-  "pycodestyle resources/test/cpython" \
-  "pycodestyle --select E501 resources/test/cpython" \
-  "flake8 resources/test/cpython" \
-  "flake8 --select=F831,F541,F634,F403,F706,F901,E501 resources/test/cpython" \
-  "python -m scripts.run_flake8 resources/test/cpython" \
-  "python -m scripts.run_flake8 resources/test/cpython --select=F831,F541,F634,F403,F706,F901,E501"
-```
-
-In order, these evaluate:
-
-- ruff
-- Pylint
-- PyFlakes
-- autoflake
-- pycodestyle
-- pycodestyle, limited to the checks supported by ruff
-- Flake8
-- Flake8, limited to the checks supported by ruff
-- Flake8, with a hack to enable multiprocessing on macOS
-- Flake8, with a hack to enable multiprocessing on macOS, limited to the checks supported by ruff
-
-(You can `poetry install` from `./scripts` to create a working environment for the above.)
-
-```shell
-Benchmark 1: ./target/release/ruff ./resources/test/cpython/ --no-cache
-  Time (mean ± σ):     469.3 ms ±  16.3 ms    [User: 2663.0 ms, System: 972.5 ms]
-  Range (min … max):   445.2 ms … 494.8 ms    10 runs
-
-Benchmark 2: pylint --recursive=y resources/test/cpython/
-  Time (mean ± σ):     27.211 s ±  0.097 s    [User: 26.405 s, System: 0.799 s]
-  Range (min … max):   27.056 s … 27.349 s    10 runs
-
-Benchmark 3: pyflakes resources/test/cpython
-  Time (mean ± σ):     27.309 s ±  0.033 s    [User: 27.137 s, System: 0.169 s]
-  Range (min … max):   27.267 s … 27.372 s    10 runs
-
-Benchmark 4: autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython
-  Time (mean ± σ):      8.027 s ±  0.024 s    [User: 74.255 s, System: 0.953 s]
-  Range (min … max):    7.969 s …  8.052 s    10 runs
-
-Benchmark 5: pycodestyle resources/test/cpython
-  Time (mean ± σ):     41.666 s ±  0.266 s    [User: 41.531 s, System: 0.132 s]
-  Range (min … max):   41.295 s … 41.980 s    10 runs
-
-Benchmark 6: pycodestyle --select E501 resources/test/cpython
-  Time (mean ± σ):     14.547 s ±  0.077 s    [User: 14.466 s, System: 0.079 s]
-  Range (min … max):   14.429 s … 14.695 s    10 runs
-
-Benchmark 7: flake8 resources/test/cpython
-  Time (mean ± σ):     75.700 s ±  0.152 s    [User: 75.254 s, System: 0.440 s]
-  Range (min … max):   75.513 s … 76.014 s    10 runs
-
-Benchmark 8: flake8 --select=F831,F541,F634,F403,F706,F901,E501 resources/test/cpython
-  Time (mean ± σ):     75.122 s ±  0.532 s    [User: 74.677 s, System: 0.440 s]
-  Range (min … max):   74.130 s … 75.606 s    10 runs
-
-Benchmark 9: python -m scripts.run_flake8 resources/test/cpython
-  Time (mean ± σ):     12.794 s ±  0.147 s    [User: 90.792 s, System: 0.738 s]
-  Range (min … max):   12.606 s … 13.030 s    10 runs
-
-Benchmark 10: python -m scripts.run_flake8 resources/test/cpython --select=F831,F541,F634,F403,F706,F901,E501
-  Time (mean ± σ):     12.487 s ±  0.118 s    [User: 90.052 s, System: 0.714 s]
-  Range (min … max):   12.265 s … 12.665 s    10 runs
-
-Summary
-  './target/release/ruff ./resources/test/cpython/ --no-cache' ran
-   17.10 ± 0.60 times faster than 'autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython'
-   26.60 ± 0.96 times faster than 'python -m scripts.run_flake8 resources/test/cpython --select=F831,F541,F634,F403,F706,F901,E501'
-   27.26 ± 1.00 times faster than 'python -m scripts.run_flake8 resources/test/cpython'
-   30.99 ± 1.09 times faster than 'pycodestyle --select E501 resources/test/cpython'
-   57.98 ± 2.03 times faster than 'pylint --recursive=y resources/test/cpython/'
-   58.19 ± 2.02 times faster than 'pyflakes resources/test/cpython'
-   88.77 ± 3.14 times faster than 'pycodestyle resources/test/cpython'
-  160.06 ± 5.68 times faster than 'flake8 --select=F831,F541,F634,F403,F706,F901,E501 resources/test/cpython'
-  161.29 ± 5.61 times faster than 'flake8 resources/test/cpython'
+```html
+<a href="https://github.com/charliermarsh/ruff"><img src="https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json" alt="Ruff" style="max-width:100%;"></a>
 ```
 
 ## License
 
 MIT
+
+<div align="center">
+  <a target="_blank" href="https://astral.sh" style="background:none">
+    <img src="https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/svg/Astral.svg">
+  </a>
+</div>

_typos.toml

@@ -0,0 +1,10 @@
+[files]
+extend-exclude = ["resources", "snapshots"]
+
+[default.extend-words]
+trivias = "trivias"
+hel = "hel"
+whos = "whos"
+spawnve = "spawnve"
+ned = "ned"
+poit = "poit"

assets/badge/v0.json

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+{
+  "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

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+{
+  "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"
+}

assets/badge/v2.json

@@ -0,0 +1,8 @@
+{
+  "label": "",
+  "message": "Ruff",
+  "logoSvg": "<svg width=\"510\" height=\"622\" viewBox=\"0 0 510 622\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M206.701 0C200.964 0 196.314 4.64131 196.314 10.3667V41.4667C196.314 47.192 191.663 51.8333 185.927 51.8333H156.843C151.107 51.8333 146.456 56.4746 146.456 62.2V145.133C146.456 150.859 141.806 155.5 136.069 155.5H106.986C101.249 155.5 96.5988 160.141 96.5988 165.867V222.883C96.5988 228.609 91.9484 233.25 86.2118 233.25H57.1283C51.3917 233.25 46.7413 237.891 46.7413 243.617V300.633C46.7413 306.359 42.0909 311 36.3544 311H10.387C4.6504 311 0 315.641 0 321.367V352.467C0 358.192 4.6504 362.833 10.387 362.833H145.418C151.154 362.833 155.804 367.475 155.804 373.2V430.217C155.804 435.942 151.154 440.583 145.418 440.583H116.334C110.597 440.583 105.947 445.225 105.947 450.95V507.967C105.947 513.692 101.297 518.333 95.5601 518.333H66.4766C60.74 518.333 56.0896 522.975 56.0896 528.7V611.633C56.0896 617.359 60.74 622 66.4766 622H149.572C155.309 622 159.959 617.359 159.959 611.633V570.167H201.507C207.244 570.167 211.894 565.525 211.894 559.8V528.7C211.894 522.975 216.544 518.333 222.281 518.333H251.365C257.101 518.333 261.752 513.692 261.752 507.967V476.867C261.752 471.141 266.402 466.5 272.138 466.5H301.222C306.959 466.5 311.609 461.859 311.609 456.133V425.033C311.609 419.308 316.259 414.667 321.996 414.667H351.079C356.816 414.667 361.466 410.025 361.466 404.3V373.2C361.466 367.475 366.117 362.833 371.853 362.833H400.937C406.673 362.833 411.324 358.192 411.324 352.467V321.367C411.324 315.641 415.974 311 421.711 311H450.794C456.531 311 461.181 306.359 461.181 300.633V217.7C461.181 211.975 456.531 207.333 450.794 207.333H420.672C414.936 207.333 410.285 202.692 410.285 196.967V165.867C410.285 160.141 414.936 155.5 420.672 155.5H449.756C455.492 155.5 460.143 150.859 460.143 145.133V114.033C460.143 108.308 464.793 103.667 470.53 103.667H499.613C505.35 103.667 510 99.0253 510 93.3V10.3667C510 4.64132 505.35 0 499.613 0H206.701ZM168.269 440.583C162.532 440.583 157.882 445.225 157.882 450.95V507.967C157.882 513.692 153.231 518.333 147.495 518.333H118.411C112.675 518.333 108.024 522.975 108.024 528.7V559.8C108.024 565.525 112.675 570.167 118.411 570.167H159.959V528.7C159.959 522.975 164.61 518.333 170.346 518.333H199.43C205.166 518.333 209.817 513.692 209.817 507.967V476.867C209.817 471.141 214.467 466.5 220.204 466.5H249.287C255.024 466.5 259.674 461.859 259.674 456.133V425.033C259.674 419.308 264.325 414.667 270.061 414.667H299.145C304.881 414.667 309.532 410.025 309.532 404.3V373.2C309.532 367.475 314.182 362.833 319.919 362.833H349.002C354.739 362.833 359.389 358.192 359.389 352.467V321.367C359.389 315.641 364.039 311 369.776 311H398.859C404.596 311 409.246 306.359 409.246 300.633V269.533C409.246 263.808 404.596 259.167 398.859 259.167H318.88C313.143 259.167 308.493 254.525 308.493 248.8V217.7C308.493 211.975 313.143 207.333 318.88 207.333H347.963C353.7 207.333 358.35 202.692 358.35 196.967V165.867C358.35 160.141 363.001 155.5 368.737 155.5H397.821C403.557 155.5 408.208 150.859 408.208 145.133V114.033C408.208 108.308 412.858 103.667 418.595 103.667H447.678C453.415 103.667 458.065 99.0253 458.065 93.3V62.2C458.065 56.4746 453.415 51.8333 447.678 51.8333H208.778C203.041 51.8333 198.391 56.4746 198.391 62.2V145.133C198.391 150.859 193.741 155.5 188.004 155.5H158.921C153.184 155.5 148.534 160.141 148.534 165.867V222.883C148.534 228.609 143.883 233.25 138.147 233.25H109.063C103.327 233.25 98.6762 237.891 98.6762 243.617V300.633C98.6762 306.359 103.327 311 109.063 311H197.352C203.089 311 207.739 315.641 207.739 321.367V430.217C207.739 435.942 203.089 440.583 197.352 440.583H168.269Z\" fill=\"#D7FF64\"/></svg>",
+  "logoWidth": 10,
+  "labelColor": "grey",
+  "color": "#261230"
+}

assets/svg/Astral.svg

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+  <rect width="138.764" height="24" rx="2.18182" fill="#261230"/>
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+    fill="#D7FF64"/>
+  <path
+    d="M33.079 15.2726H37.6491V14.2131H34.2822V12.3815H37.2002V11.3938H34.2822V9.77765H37.6491V8.72714H33.079V15.2726Z"
+    fill="#D7FF64"/>
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+    d="M42.923 15.2726H46.2451C47.4572 15.2726 48.2025 14.5812 48.2025 13.5487C48.2025 12.7675 47.8343 12.175 47.0532 11.9954V11.7799C47.6637 11.5734 48.0319 11.0436 48.0319 10.3433C48.0319 9.38259 47.4572 8.72714 46.281 8.72714H42.923V15.2726ZM44.0992 11.4746V9.65195H45.9578C46.4875 9.65195 46.7928 9.92131 46.7928 10.3523V10.7653C46.7928 11.1873 46.4965 11.4746 45.9758 11.4746H44.0992ZM44.0992 14.3388V12.3904H46.0296C46.5863 12.3904 46.9365 12.6418 46.9365 13.1806V13.5666C46.9365 14.0425 46.5684 14.3388 45.9309 14.3388H44.0992Z"
+    fill="#D7FF64"/>
+  <path
+    d="M49.6959 8.72714L52.174 12.579V14.1952H50.1898V15.2726H53.3772V12.579L55.8553 8.72714H54.4456L53.5119 10.2535L52.8744 11.3759H52.6679L52.0483 10.2715L51.1056 8.72714H49.6959Z"
+    fill="#D7FF64"/>
+  <path fill-rule="evenodd" clip-rule="evenodd"
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+    fill="#D7FF64"/>
+</svg>

clippy.toml

@@ -0,0 +1,7 @@
+doc-valid-idents = [
+  "StackOverflow",
+  "CodeQL",
+  "IPython",
+  "NumPy",
+  "..",
+]

crates/flake8_to_ruff/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "flake8-to-ruff"
+version = "0.0.271"
+edition = { workspace = true }
+rust-version = { workspace = true }
+
+[dependencies]
+ruff = { path = "../ruff", default-features = false }
+
+anyhow = { workspace = true }
+clap = { workspace = true }
+colored = { workspace = true }
+configparser = { version = "3.0.2" }
+once_cell = { workspace = true }
+regex = { workspace = true }
+rustc-hash = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+strum = { workspace = true }
+strum_macros = { workspace = true }
+toml = { workspace = true }

crates/flake8_to_ruff/README.md

@@ -0,0 +1,99 @@
+# flake8-to-ruff
+
+Convert existing Flake8 configuration files (`setup.cfg`, `tox.ini`, or `.flake8`) for use with
+[Ruff](https://github.com/charliermarsh/ruff).
+
+Generates a Ruff-compatible `pyproject.toml` section.
+
+## Installation and Usage
+
+### Installation
+
+Available as [`flake8-to-ruff`](https://pypi.org/project/flake8-to-ruff/) on PyPI:
+
+```shell
+pip install flake8-to-ruff
+```
+
+### Usage
+
+To run `flake8-to-ruff`:
+
+```shell
+flake8-to-ruff path/to/setup.cfg
+flake8-to-ruff path/to/tox.ini
+flake8-to-ruff path/to/.flake8
+```
+
+`flake8-to-ruff` will print the relevant `pyproject.toml` sections to standard output, like so:
+
+```toml
+[tool.ruff]
+exclude = [
+    '.svn',
+    'CVS',
+    '.bzr',
+    '.hg',
+    '.git',
+    '__pycache__',
+    '.tox',
+    '.idea',
+    '.mypy_cache',
+    '.venv',
+    'node_modules',
+    '_state_machine.py',
+    'test_fstring.py',
+    'bad_coding2.py',
+    'badsyntax_*.py',
+]
+select = [
+    'A',
+    'E',
+    'F',
+    'Q',
+]
+ignore = []
+
+[tool.ruff.flake8-quotes]
+inline-quotes = 'single'
+
+[tool.ruff.pep8-naming]
+ignore-names = [
+    'foo',
+    'bar',
+]
+```
+
+### Plugins
+
+`flake8-to-ruff` will attempt to infer any activated plugins based on the settings provided in your
+configuration file.
+
+For example, if your `.flake8` file includes a `docstring-convention` property, `flake8-to-ruff`
+will enable the appropriate [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
+checks.
+
+Alternatively, you can manually specify plugins on the command-line:
+
+```shell
+flake8-to-ruff path/to/.flake8 --plugin flake8-builtins --plugin flake8-quotes
+```
+
+## Limitations
+
+1. Ruff only supports a subset of the Flake configuration options. `flake8-to-ruff` will warn on and
+   ignore unsupported options in the `.flake8` file (or equivalent). (Similarly, Ruff has a few
+   configuration options that don't exist in Flake8.)
+1. Ruff will omit any rule codes that are unimplemented or unsupported by Ruff, including rule
+   codes from unsupported plugins. (See the
+   [documentation](https://beta.ruff.rs/docs/faq/#how-does-ruff-compare-to-flake8) for the complete
+   list of supported plugins.)
+
+## License
+
+MIT
+
+## Contributing
+
+Contributions are welcome and hugely appreciated. To get started, check out the
+[contributing guidelines](https://github.com/charliermarsh/ruff/blob/main/CONTRIBUTING.md).

crates/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",
+]

crates/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

crates/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

crates/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,

crates/flake8_to_ruff/examples/poetry.ini

@@ -0,0 +1,36 @@
+[flake8]
+min_python_version = 3.7.0
+max-line-length = 88
+ban-relative-imports = true
+# flake8-use-fstring: https://github.com/MichaelKim0407/flake8-use-fstring#--percent-greedy-and---format-greedy
+format-greedy = 1
+inline-quotes = double
+enable-extensions = TC, TC1
+type-checking-strict = true
+eradicate-whitelist-extend = ^-.*;
+extend-ignore =
+    # E203: Whitespace before ':' (pycqa/pycodestyle#373)
+    E203,
+    # SIM106: Handle error-cases first
+    SIM106,
+    # ANN101: Missing type annotation for self in method
+    ANN101,
+    # ANN102: Missing type annotation for cls in classmethod
+    ANN102,
+    # PIE781: assign-and-return
+    PIE781,
+    # PIE798 no-unnecessary-class: Consider using a module for namespacing instead
+    PIE798,
+per-file-ignores =
+    # TC002: Move third-party import '...' into a type-checking block
+    __init__.py:TC002,
+    # ANN201: Missing return type annotation for public function
+    tests/test_*:ANN201
+    tests/**/test_*:ANN201
+extend-exclude =
+    # Frozen and not subject to change in this repo:
+    get-poetry.py,
+    install-poetry.py,
+    # External to the project's coding standards:
+    tests/fixtures/*,
+    tests/**/fixtures/*,

crates/flake8_to_ruff/examples/python-discord.ini

@@ -0,0 +1,19 @@
+[flake8]
+max-line-length=120
+docstring-convention=all
+import-order-style=pycharm
+application_import_names=bot,tests
+exclude=.cache,.venv,.git,constants.py
+extend-ignore=
+    B311,W503,E226,S311,T000,E731
+    # Missing Docstrings
+    D100,D104,D105,D107,
+    # Docstring Whitespace
+    D203,D212,D214,D215,
+    # Docstring Quotes
+    D301,D302,
+    # Docstring Content
+    D400,D401,D402,D404,D405,D406,D407,D408,D409,D410,D411,D412,D413,D414,D416,D417
+    # Type Annotations
+    ANN002,ANN003,ANN101,ANN102,ANN204,ANN206,ANN401
+per-file-ignores=tests/*:D,ANN

crates/flake8_to_ruff/examples/requests.ini

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

crates/flake8_to_ruff/pyproject.toml

@@ -0,0 +1,34 @@
+[project]
+name = "flake8-to-ruff"
+keywords = ["automation", "flake8", "pycodestyle", "pyflakes", "pylint", "clippy"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "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 = "Convert existing Flake8 configuration to Ruff."
+requires-python = ">=3.7"
+
+[project.urls]
+repository = "https://github.com/charliermarsh/ruff#subdirectory=crates/flake8_to_ruff"
+
+[build-system]
+requires = ["maturin>=1.0,<2.0"]
+build-backend = "maturin"
+
+[tool.maturin]
+bindings = "bin"
+strip = true

crates/flake8_to_ruff/src/main.rs

@@ -0,0 +1,68 @@
+//! Utility to generate Ruff's `pyproject.toml` section from a Flake8 INI file.
+
+use std::path::PathBuf;
+
+use anyhow::Result;
+use clap::Parser;
+use configparser::ini::Ini;
+
+use ruff::flake8_to_ruff::{self, ExternalConfig};
+use ruff::logging::{set_up_logging, LogLevel};
+
+#[derive(Parser)]
+#[command(
+    about = "Convert existing Flake8 configuration to Ruff.",
+    long_about = None
+)]
+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<flake8_to_ruff::Plugin>>,
+}
+
+fn main() -> Result<()> {
+    set_up_logging(&LogLevel::Default)?;
+
+    let args = Args::parse();
+
+    // Read the INI file.
+    let mut ini = Ini::new_cs();
+    ini.set_multiline(true);
+    let config = ini.load(args.file).map_err(|msg| anyhow::anyhow!(msg))?;
+
+    // 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(),
+            ..Default::default()
+        })
+        .unwrap_or_default();
+    let external_config = ExternalConfig {
+        project: pyproject
+            .as_ref()
+            .and_then(|pyproject| pyproject.project.as_ref()),
+        ..external_config
+    };
+
+    // Create Ruff's pyproject.toml section.
+    let pyproject = flake8_to_ruff::convert(&config, &external_config, args.plugin)?;
+
+    #[allow(clippy::print_stdout)]
+    {
+        println!("{}", toml::to_string_pretty(&pyproject)?);
+    }
+
+    Ok(())
+}

crates/ruff/Cargo.toml

@@ -0,0 +1,87 @@
+[package]
+name = "ruff"
+version = "0.0.271"
+authors.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+documentation.workspace = true
+homepage.workspace = true
+repository.workspace = true
+readme = "README.md"
+license = "MIT"
+
+[lib]
+name = "ruff"
+
+[dependencies]
+ruff_cache = { path = "../ruff_cache" }
+ruff_diagnostics = { path = "../ruff_diagnostics", features = ["serde"] }
+ruff_macros = { path = "../ruff_macros" }
+ruff_newlines = { path = "../ruff_newlines" }
+ruff_python_ast = { path = "../ruff_python_ast", features = ["serde"] }
+ruff_python_semantic = { path = "../ruff_python_semantic" }
+ruff_python_stdlib = { path = "../ruff_python_stdlib" }
+ruff_rustpython = { path = "../ruff_rustpython" }
+ruff_text_size = { workspace = true }
+ruff_textwrap = { path = "../ruff_textwrap" }
+
+annotate-snippets = { version = "0.9.1", features = ["color"] }
+anyhow = { workspace = true }
+bitflags = { workspace = true }
+chrono = { workspace = true }
+clap = { workspace = true, features = ["derive", "string"], optional = true }
+colored = { workspace = true }
+dirs = { version = "5.0.0" }
+fern = { version = "0.6.1" }
+glob = { workspace = true }
+globset = { workspace = true }
+ignore = { workspace = true }
+imperative = { version = "1.0.4" }
+is-macro = { workspace = true }
+itertools = { workspace = true }
+libcst = { workspace = true }
+log = { workspace = true }
+natord = { version = "1.0.9" }
+nohash-hasher = { workspace = true }
+num-bigint = { workspace = true }
+num-traits = { workspace = true }
+once_cell = { workspace = true }
+path-absolutize = { workspace = true, features = [
+  "once_cell_cache",
+  "use_unix_paths_on_wasm",
+] }
+pathdiff = { version = "0.2.1" }
+pep440_rs = { version = "0.3.1", features = ["serde"] }
+pyproject-toml = { version = "0.6.0" }
+quick-junit = { version = "0.3.2" }
+regex = { workspace = true }
+result-like = { version = "0.4.6" }
+rustc-hash = { workspace = true }
+rustpython-format = { workspace = true }
+rustpython-parser = { workspace = true }
+schemars = { workspace = true, optional = true }
+semver = { version = "1.0.16" }
+serde = { workspace = true }
+serde_json = { workspace = true }
+similar = { workspace = true, features = ["inline"] }
+shellexpand = { workspace = true }
+smallvec = { workspace = true }
+strum = { workspace = true }
+strum_macros = { workspace = true }
+thiserror = { version = "1.0.38" }
+toml = { workspace = true }
+typed-arena = { version = "2.0.2" }
+unicode-width = { version = "0.1.10" }
+unicode_names2 = { version = "0.6.0", git = "https://github.com/youknowone/unicode_names2.git", rev = "4ce16aa85cbcdd9cc830410f1a72ef9a235f2fde" }
+
+[dev-dependencies]
+insta = { workspace = true }
+pretty_assertions = "1.3.0"
+test-case = { workspace = true }
+# Disable colored output in tests
+colored = { workspace = true, features = ["no-color"] }
+
+[features]
+default = []
+schemars = ["dep:schemars"]
+jupyter_notebook = []

crates/ruff/resources/test/disallowed_rule_names.txt

@@ -0,0 +1,8 @@
+avoid-*
+do-not-*
+uses-*
+*-used
+rewrite-*
+prefer-*
+consider-*
+use-*

crates/ruff/resources/test/fixtures/README.md

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

crates/ruff/resources/test/fixtures/airflow/AIR001.py

@@ -0,0 +1,16 @@
+from airflow.operators import PythonOperator
+
+
+def my_callable():
+    pass
+
+
+my_task = PythonOperator(task_id="my_task", callable=my_callable)
+my_task_2 = PythonOperator(callable=my_callable, task_id="my_task_2")
+
+incorrect_name = PythonOperator(task_id="my_task")
+incorrect_name_2 = PythonOperator(callable=my_callable, task_id="my_task_2")
+
+from my_module import MyClass
+
+incorrect_name = MyClass(task_id="my_task")

crates/ruff/resources/test/fixtures/eradicate/ERA001.py

@@ -0,0 +1,21 @@
+#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.
+    # # This is a (nested) comment.
+    #return True
+    return False
+
+#import os  # noqa: ERA001
+
+
+class A():
+    pass
+    # b = c

crates/ruff/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])

crates/ruff/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]

crates/ruff/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"

crates/ruff/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

crates/ruff/resources/test/fixtures/flake8_2020/YTT202.py

@@ -0,0 +1,7 @@
+import six
+from six import PY3
+
+if six.PY3:
+    print("3")
+if PY3:
+    print("3")

crates/ruff/resources/test/fixtures/flake8_2020/YTT203.py

@@ -0,0 +1,5 @@
+import sys
+from sys import version_info
+
+sys.version_info[1] >= 5
+version_info[1] < 6

crates/ruff/resources/test/fixtures/flake8_2020/YTT204.py

@@ -0,0 +1,5 @@
+import sys
+from sys import version_info
+
+sys.version_info.minor <= 7
+version_info.minor > 8

crates/ruff/resources/test/fixtures/flake8_2020/YTT301.py

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

crates/ruff/resources/test/fixtures/flake8_2020/YTT302.py

@@ -0,0 +1,8 @@
+import sys
+from sys import version
+
+version < "3"
+sys.version < "3"
+sys.version <= "3"
+sys.version > "3"
+sys.version >= "3"

crates/ruff/resources/test/fixtures/flake8_2020/YTT303.py

@@ -0,0 +1,5 @@
+import sys
+from sys import version
+
+print(sys.version[:1])
+print(version[:1])

crates/ruff/resources/test/fixtures/flake8_annotations/allow_nested_overload.py

@@ -0,0 +1,9 @@
+class C:
+    from typing import overload
+
+    @overload
+    def f(self, x: int, y: int) -> None:
+        ...
+
+    def f(self, x, y):
+        pass

crates/ruff/resources/test/fixtures/flake8_annotations/allow_overload.py

@@ -0,0 +1,49 @@
+from typing import overload
+
+
+@overload
+def foo(i: int) -> "int":
+    ...
+
+
+@overload
+def foo(i: "str") -> "str":
+    ...
+
+
+def foo(i):
+    return i
+
+
+@overload
+def bar(i: int) -> "int":
+    ...
+
+
+@overload
+def bar(i: "str") -> "str":
+    ...
+
+
+class X:
+    def bar(i):
+        return i
+
+
+# TODO(charlie): This third case should raise an error (as in Mypy), because we have a
+# statement between the interfaces and implementation.
+@overload
+def baz(i: int) -> "int":
+    ...
+
+
+@overload
+def baz(i: "str") -> "str":
+    ...
+
+
+x = 1
+
+
+def baz(i):
+    return i

crates/ruff/resources/test/fixtures/flake8_annotations/allow_star_arg_any.py

@@ -0,0 +1,57 @@
+from typing import Any
+
+
+# OK
+def foo(a: int, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: Any, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: str) -> Any:
+    pass
+
+
+# OK
+def foo(a: int, *args: Any, **kwargs: Any) -> int:
+    pass
+
+
+# OK
+def foo(a: int, *args: Any, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: Any) -> int:
+    pass
+
+
+class Bar:
+    # OK
+    def foo_method(self, a: int, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo_method(self, a: Any, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo_method(self, a: int, *params: str, **options: str) -> Any:
+        pass
+
+    # OK
+    def foo_method(self, a: int, *params: Any, **options: Any) -> int:
+        pass
+
+    # OK
+    def foo_method(self, a: int, *params: Any, **options: str) -> int:
+        pass
+
+    # OK
+    def foo_method(self, a: int, *params: str, **options: Any) -> int:
+        pass

crates/ruff/resources/test/fixtures/flake8_annotations/annotation_presence.py

@@ -0,0 +1,139 @@
+from typing import Any, Type
+from typing_extensions import override
+
+# Error
+def foo(a, b):
+    pass
+
+
+# Error
+def foo(a: int, b):
+    pass
+
+
+# Error
+def foo(a: int, b) -> int:
+    pass
+
+
+# Error
+def foo(a: int, b: int):
+    pass
+
+
+# Error
+def foo():
+    pass
+
+
+# OK
+def foo(a: int, b: int) -> int:
+    pass
+
+
+# OK
+def foo() -> int:
+    pass
+
+
+# OK
+def foo(a: int, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: Any, *args: str, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: str) -> Any:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: Any, **kwargs: Any) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: Any, **kwargs: str) -> int:
+    pass
+
+
+# ANN401
+def foo(a: int, *args: str, **kwargs: Any) -> int:
+    pass
+
+
+class Foo:
+    # OK
+    def foo(self: "Foo", a: int, b: int) -> int:
+        pass
+
+    # ANN101
+    def foo(self, a: int, b: int) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: Any, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: str, **options: str) -> Any:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: Any, **options: Any) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: Any, **options: str) -> int:
+        pass
+
+    # ANN401
+    def foo(self: "Foo", a: int, *params: str, **options: Any) -> int:
+        pass
+
+    # ANN401
+    @override
+    def foo(self: "Foo", a: Any, *params: str, **options: str) -> int:
+        pass
+
+    # ANN401
+    @override
+    def foo(self: "Foo", a: int, *params: str, **options: str) -> Any:
+        pass
+
+    # ANN401
+    @override
+    def foo(self: "Foo", a: int, *params: Any, **options: Any) -> int:
+        pass
+
+    # ANN401
+    @override
+    def foo(self: "Foo", a: int, *params: Any, **options: str) -> int:
+        pass
+
+    # ANN401
+    @override
+    def foo(self: "Foo", a: int, *params: str, **options: Any) -> int:
+        pass
+
+    # OK
+    @classmethod
+    def foo(cls: Type["Foo"], a: int, b: int) -> int:
+        pass
+
+    # ANN102
+    @classmethod
+    def foo(cls, a: int, b: int) -> int:
+        pass
+
+    # ANN101
+    def foo(self, /, a: int, b: int) -> int:
+        pass
+
+
+# OK
+def f(*args: *tuple[int]) -> None: ...

crates/ruff/resources/test/fixtures/flake8_annotations/ignore_fully_untyped.py

@@ -0,0 +1,44 @@
+"""Test case expected to be run with `ignore_fully_untyped = True`."""
+
+
+def ok_fully_untyped_1(a, b):
+    pass
+
+
+def ok_fully_untyped_2():
+    pass
+
+
+def ok_fully_typed_1(a: int, b: int) -> int:
+    pass
+
+
+def ok_fully_typed_2() -> int:
+    pass
+
+
+def ok_fully_typed_3(a: int, *args: str, **kwargs: str) -> int:
+    pass
+
+
+def error_partially_typed_1(a: int, b):
+    pass
+
+
+def error_partially_typed_2(a: int, b) -> int:
+    pass
+
+
+def error_partially_typed_3(a: int, b: int):
+    pass
+
+
+class X:
+    def ok_untyped_method_with_arg(self, a):
+        pass
+
+    def ok_untyped_method(self):
+        pass
+
+    def error_typed_self(self: X):
+        pass

crates/ruff/resources/test/fixtures/flake8_annotations/mypy_init_return.py

@@ -0,0 +1,48 @@
+"""Test case expected to be run with `mypy_init_return = True`."""
+
+# Error
+class Foo:
+    def __init__(self):
+        ...
+
+
+# Error
+class Foo:
+    def __init__(self, foo):
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self, foo) -> None:
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self) -> None:
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self, foo: int):
+        ...
+
+
+# OK
+class Foo:
+    def __init__(self, foo: int) -> None:
+        ...
+
+
+# Error
+def __init__(self, foo: int):
+    ...
+
+
+# Error – used to be ok for a moment since the mere presence
+# of a vararg falsely indicated that the function has a typed argument.
+class Foo:
+    def __init__(self, *arg):
+        ...

crates/ruff/resources/test/fixtures/flake8_annotations/simple_magic_methods.py

@@ -0,0 +1,42 @@
+class Foo:
+    def __str__(self):
+        ...
+
+    def __repr__(self):
+        ...
+
+    def __len__(self):
+        ...
+
+    def __length_hint__(self):
+        ...
+
+    def __init__(self):
+        ...
+
+    def __del__(self):
+        ...
+
+    def __bool__(self):
+        ...
+
+    def __bytes__(self):
+        ...
+
+    def __format__(self, format_spec):
+        ...
+
+    def __contains__(self, item):
+        ...
+
+    def __complex__(self):
+        ...
+
+    def __int__(self):
+        ...
+
+    def __float__(self):
+        ...
+
+    def __index__(self):
+        ...

crates/ruff/resources/test/fixtures/flake8_annotations/suppress_dummy_args.py

@@ -0,0 +1,26 @@
+"""Test case expected to be run with `suppress_dummy_args = True`."""
+
+# OK
+def foo(_) -> None:
+    ...
+
+
+# OK
+def foo(*_) -> None:
+    ...
+
+
+# OK
+def foo(**_) -> None:
+    ...
+
+
+# OK
+def foo(a: int, _) -> None:
+    ...
+
+
+# OK
+def foo() -> None:
+    def bar(_) -> None:
+        ...

crates/ruff/resources/test/fixtures/flake8_annotations/suppress_none_returning.py

@@ -0,0 +1,60 @@
+"""Test case expected to be run with `suppress_none_returning = True`."""
+
+# OK
+def foo():
+    a = 2 + 2
+
+
+# OK
+def foo():
+    return
+
+
+# OK
+def foo():
+    return None
+
+
+# OK
+def foo():
+    a = 2 + 2
+    if a == 4:
+        return
+    else:
+        return
+
+
+# OK
+def foo():
+    a = 2 + 2
+    if a == 4:
+        return None
+    else:
+        return
+
+
+# OK
+def foo():
+    def bar() -> bool:
+        return True
+
+    bar()
+
+
+# Error
+def foo():
+    return True
+
+
+# Error
+def foo():
+    a = 2 + 2
+    if a == 4:
+        return True
+    else:
+        return
+
+
+# Error (on the argument, but not the return type)
+def foo(a):
+    a = 2 + 2

crates/ruff/resources/test/fixtures/flake8_async/ASYNC100.py

@@ -0,0 +1,23 @@
+import urllib.request
+import requests
+import httpx
+
+
+async def foo():
+    urllib.request.urlopen("http://example.com/foo/bar").read()
+
+
+async def foo():
+    requests.get()
+
+
+async def foo():
+    httpx.get()
+
+
+async def foo():
+    requests.post()
+
+
+async def foo():
+    httpx.post()

crates/ruff/resources/test/fixtures/flake8_async/ASYNC101.py

@@ -0,0 +1,31 @@
+import os
+import subprocess
+import time
+
+
+async def foo():
+    open("foo")
+
+
+async def foo():
+    time.sleep(1)
+
+
+async def foo():
+    subprocess.run("foo")
+
+
+async def foo():
+    subprocess.call("foo")
+
+
+async def foo():
+    subprocess.foo(0)
+
+
+async def foo():
+    os.wait4(10)
+
+
+async def foo():
+    os.wait(12)

crates/ruff/resources/test/fixtures/flake8_async/ASYNC102.py

@@ -0,0 +1,13 @@
+import os
+
+
+async def foo():
+    os.popen()
+
+
+async def foo():
+    os.spawnl()
+
+
+async def foo():
+    os.fspath("foo")

crates/ruff/resources/test/fixtures/flake8_bandit/S101.py

@@ -0,0 +1,13 @@
+assert True  # S101
+
+
+def fn():
+    x = 1
+    assert x == 1  # S101
+    assert x == 2  # S101
+
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    assert True  # OK

crates/ruff/resources/test/fixtures/flake8_bandit/S102.py

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

crates/ruff/resources/test/fixtures/flake8_bandit/S103.py

@@ -0,0 +1,22 @@
+import os
+import stat
+
+keyfile = "foo"
+
+os.chmod("/etc/passwd", 0o227)  # Error
+os.chmod("/etc/passwd", 0o7)  # Error
+os.chmod("/etc/passwd", 0o664)  # OK
+os.chmod("/etc/passwd", 0o777)  # Error
+os.chmod("/etc/passwd", 0o770)  # Error
+os.chmod("/etc/passwd", 0o776)  # Error
+os.chmod("/etc/passwd", 0o760)  # OK
+os.chmod("~/.bashrc", 511)  # Error
+os.chmod("/etc/hosts", 0o777)  # Error
+os.chmod("/tmp/oh_hai", 0x1FF)  # Error
+os.chmod("/etc/passwd", stat.S_IRWXU)  # OK
+os.chmod(keyfile, 0o777)  # Error
+os.chmod(keyfile, 0o7 | 0o70 | 0o700)  # Error
+os.chmod(keyfile, stat.S_IRWXO | stat.S_IRWXG | stat.S_IRWXU)  # Error
+os.chmod("~/hidden_exec", stat.S_IXGRP)  # Error
+os.chmod("~/hidden_exec", stat.S_IXOTH)  # OK
+os.chmod("/etc/passwd", stat.S_IWOTH)  # Error

crates/ruff/resources/test/fixtures/flake8_bandit/S104.py

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

crates/ruff/resources/test/fixtures/flake8_bandit/S105.py

@@ -0,0 +1,77 @@
+d = {}
+
+# OK
+safe = "s3cr3t"
+password = True
+password = safe
+password = ""
+password is True
+password == 1
+d["safe"] = "s3cr3t"
+
+# Errors
+password = "s3cr3t"
+_pass = "s3cr3t"
+passwd = "s3cr3t"
+pwd = "s3cr3t"
+secret = "s3cr3t"
+token = "s3cr3t"
+secrete = "s3cr3t"
+safe = password = "s3cr3t"
+password = safe = "s3cr3t"
+PASSWORD = "s3cr3t"
+PassWord = "s3cr3t"
+
+d["password"] = "s3cr3t"
+d["pass"] = "s3cr3t"
+d["passwd"] = "s3cr3t"
+d["pwd"] = "s3cr3t"
+d["secret"] = "s3cr3t"
+d["token"] = "s3cr3t"
+d["secrete"] = "s3cr3t"
+safe = d["password"] = "s3cr3t"
+d["password"] = safe = "s3cr3t"
+
+
+class MyClass:
+    password = "s3cr3t"
+    safe = password
+
+
+MyClass.password = "s3cr3t"
+MyClass._pass = "s3cr3t"
+MyClass.passwd = "s3cr3t"
+MyClass.pwd = "s3cr3t"
+MyClass.secret = "s3cr3t"
+MyClass.token = "s3cr3t"
+MyClass.secrete = "s3cr3t"
+
+password == "s3cr3t"
+_pass == "s3cr3t"
+passwd == "s3cr3t"
+pwd == "s3cr3t"
+secret == "s3cr3t"
+token == "s3cr3t"
+secrete == "s3cr3t"
+password == safe == "s3cr3t"
+
+if token == "1\n2":
+    pass
+
+if token == "3\t4":
+    pass
+
+if token == "5\r6":
+    pass
+
+
+# These should not be flagged
+passed_msg = "You have passed!"
+compassion = "Please don't match!"
+impassable = "You shall not pass!"
+passwords = ""
+PASSWORDS = ""
+passphrases = ""
+PassPhrases = ""
+tokens = ""
+secrets = ""

crates/ruff/resources/test/fixtures/flake8_bandit/S106.py

@@ -0,0 +1,14 @@
+def func(pos, password):
+    pass
+
+
+string = "Hello World"
+
+# OK
+func("s3cr3t")
+func(1, password=string)
+func(1, password="")
+func(pos="s3cr3t", password=string)
+
+# Error
+func(1, password="s3cr3t")

crates/ruff/resources/test/fixtures/flake8_bandit/S107.py

@@ -0,0 +1,34 @@
+def ok(first, default="default"):
+    pass
+
+
+def default(first, password="default"):
+    pass
+
+
+def ok_posonly(first, /, pos, default="posonly"):
+    pass
+
+
+def default_posonly(first, /, pos, password="posonly"):
+    pass
+
+
+def ok_kwonly(first, *, default="kwonly"):
+    pass
+
+
+def default_kwonly(first, *, password="kwonly"):
+    pass
+
+
+def ok_all(first, /, pos, default="posonly", *, kwonly="kwonly"):
+    pass
+
+
+def default_all(first, /, pos, secret="posonly", *, password="kwonly"):
+    pass
+
+
+def ok_empty(first, password=""):
+    pass

crates/ruff/resources/test/fixtures/flake8_bandit/S108.py

@@ -0,0 +1,16 @@
+# ok
+with open("/abc/tmp", "w") as f:
+    f.write("def")
+
+with open("/tmp/abc", "w") as f:
+    f.write("def")
+
+with open("/var/tmp/123", "w") as f:
+    f.write("def")
+
+with open("/dev/shm/unit/test", "w") as f:
+    f.write("def")
+
+# not ok by config
+with open("/foo/bar", "w") as f:
+    f.write("def")

crates/ruff/resources/test/fixtures/flake8_bandit/S110.py

@@ -0,0 +1,14 @@
+try:
+    pass
+except Exception:
+    pass
+
+try:
+    pass
+except:
+    pass
+
+try:
+    pass
+except ValueError:
+    pass

crates/ruff/resources/test/fixtures/flake8_bandit/S112.py

@@ -0,0 +1,29 @@
+try:
+    pass
+except Exception:
+    continue
+
+try:
+    pass
+except:
+    continue
+
+try:
+    pass
+except (Exception,):
+    continue
+
+try:
+    pass
+except (Exception, ValueError):
+    continue
+
+try:
+    pass
+except ValueError:
+    continue
+
+try:
+    pass
+except (ValueError,):
+    continue

crates/ruff/resources/test/fixtures/flake8_bandit/S113.py

@@ -0,0 +1,23 @@
+import requests
+
+requests.get('https://gmail.com')
+requests.get('https://gmail.com', timeout=None)
+requests.get('https://gmail.com', timeout=5)
+requests.post('https://gmail.com')
+requests.post('https://gmail.com', timeout=None)
+requests.post('https://gmail.com', timeout=5)
+requests.put('https://gmail.com')
+requests.put('https://gmail.com', timeout=None)
+requests.put('https://gmail.com', timeout=5)
+requests.delete('https://gmail.com')
+requests.delete('https://gmail.com', timeout=None)
+requests.delete('https://gmail.com', timeout=5)
+requests.patch('https://gmail.com')
+requests.patch('https://gmail.com', timeout=None)
+requests.patch('https://gmail.com', timeout=5)
+requests.options('https://gmail.com')
+requests.options('https://gmail.com', timeout=None)
+requests.options('https://gmail.com', timeout=5)
+requests.head('https://gmail.com')
+requests.head('https://gmail.com', timeout=None)
+requests.head('https://gmail.com', timeout=5)

crates/ruff/resources/test/fixtures/flake8_bandit/S301.py

@@ -0,0 +1,3 @@
+import pickle
+
+pickle.loads()

crates/ruff/resources/test/fixtures/flake8_bandit/S312.py

@@ -0,0 +1,3 @@
+from telnetlib import Telnet
+
+Telnet("localhost", 23)

crates/ruff/resources/test/fixtures/flake8_bandit/S324.py

@@ -0,0 +1,52 @@
+import hashlib
+from hashlib import new as hashlib_new
+from hashlib import sha1 as hashlib_sha1
+
+# Invalid
+
+hashlib.new('md5')
+
+hashlib.new('md4', b'test')
+
+hashlib.new(name='md5', data=b'test')
+
+hashlib.new('MD4', data=b'test')
+
+hashlib.new('sha1')
+
+hashlib.new('sha1', data=b'test')
+
+hashlib.new('sha', data=b'test')
+
+hashlib.new(name='SHA', data=b'test')
+
+hashlib.sha(data=b'test')
+
+hashlib.md5()
+
+hashlib_new('sha1')
+
+hashlib_sha1('sha1')
+
+# usedforsecurity arg only available in Python 3.9+
+hashlib.new('sha1', usedforsecurity=True)
+
+# Valid
+
+hashlib.new('sha256')
+
+hashlib.new('SHA512')
+
+hashlib.sha256(data=b'test')
+
+# usedforsecurity arg only available in Python 3.9+
+hashlib_new(name='sha1', usedforsecurity=False)
+
+# usedforsecurity arg only available in Python 3.9+
+hashlib_sha1(name='sha1', usedforsecurity=False)
+
+# usedforsecurity arg only available in Python 3.9+
+hashlib.md4(usedforsecurity=False)
+
+# usedforsecurity arg only available in Python 3.9+
+hashlib.new(name='sha256', usedforsecurity=False)

crates/ruff/resources/test/fixtures/flake8_bandit/S501.py

@@ -0,0 +1,40 @@
+import httpx
+import requests
+
+requests.get('https://gmail.com', timeout=30, verify=True)
+requests.get('https://gmail.com', timeout=30, verify=False)
+requests.post('https://gmail.com', timeout=30, verify=True)
+requests.post('https://gmail.com', timeout=30, verify=False)
+requests.put('https://gmail.com', timeout=30, verify=True)
+requests.put('https://gmail.com', timeout=30, verify=False)
+requests.delete('https://gmail.com', timeout=30, verify=True)
+requests.delete('https://gmail.com', timeout=30, verify=False)
+requests.patch('https://gmail.com', timeout=30, verify=True)
+requests.patch('https://gmail.com', timeout=30, verify=False)
+requests.options('https://gmail.com', timeout=30, verify=True)
+requests.options('https://gmail.com', timeout=30, verify=False)
+requests.head('https://gmail.com', timeout=30, verify=True)
+requests.head('https://gmail.com', timeout=30, verify=False)
+
+httpx.request('GET', 'https://gmail.com', verify=True)
+httpx.request('GET', 'https://gmail.com', verify=False)
+httpx.get('https://gmail.com', verify=True)
+httpx.get('https://gmail.com', verify=False)
+httpx.options('https://gmail.com', verify=True)
+httpx.options('https://gmail.com', verify=False)
+httpx.head('https://gmail.com', verify=True)
+httpx.head('https://gmail.com', verify=False)
+httpx.post('https://gmail.com', verify=True)
+httpx.post('https://gmail.com', verify=False)
+httpx.put('https://gmail.com', verify=True)
+httpx.put('https://gmail.com', verify=False)
+httpx.patch('https://gmail.com', verify=True)
+httpx.patch('https://gmail.com', verify=False)
+httpx.delete('https://gmail.com', verify=True)
+httpx.delete('https://gmail.com', verify=False)
+httpx.stream('https://gmail.com', verify=True)
+httpx.stream('https://gmail.com', verify=False)
+httpx.Client()
+httpx.Client(verify=False)
+httpx.AsyncClient()
+httpx.AsyncClient(verify=False)

crates/ruff/resources/test/fixtures/flake8_bandit/S506.py

@@ -0,0 +1,31 @@
+import json
+import yaml
+from yaml import CSafeLoader
+from yaml import SafeLoader
+from yaml import SafeLoader as NewSafeLoader
+
+
+def test_yaml_load():
+    ystr = yaml.dump({"a": 1, "b": 2, "c": 3})
+    y = yaml.load(ystr)
+    yaml.dump(y)
+    try:
+        y = yaml.load(ystr, Loader=yaml.CSafeLoader)
+    except AttributeError:
+        # CSafeLoader only exists if you build yaml with LibYAML
+        y = yaml.load(ystr, Loader=yaml.SafeLoader)
+
+
+def test_json_load():
+    # no issue should be found
+    j = json.load("{}")
+
+
+yaml.load("{}", Loader=yaml.Loader)
+
+# no issue should be found
+yaml.load("{}", SafeLoader)
+yaml.load("{}", yaml.SafeLoader)
+yaml.load("{}", CSafeLoader)
+yaml.load("{}", yaml.CSafeLoader)
+yaml.load("{}", NewSafeLoader)

crates/ruff/resources/test/fixtures/flake8_bandit/S508.py

@@ -0,0 +1,6 @@
+from pysnmp.hlapi import CommunityData
+
+CommunityData("public", mpModel=0)  # S508
+CommunityData("public", mpModel=1)  # S508
+
+CommunityData("public", mpModel=2)  # OK

crates/ruff/resources/test/fixtures/flake8_bandit/S509.py

@@ -0,0 +1,7 @@
+from pysnmp.hlapi import UsmUserData
+
+
+insecure = UsmUserData("securityName")  # S509
+auth_no_priv = UsmUserData("securityName", "authName")  # S509
+
+less_insecure = UsmUserData("securityName", "authName", "privName")  # OK

crates/ruff/resources/test/fixtures/flake8_bandit/S601.py

@@ -0,0 +1,3 @@
+import paramiko
+
+paramiko.exec_command('something; really; unsafe')

crates/ruff/resources/test/fixtures/flake8_bandit/S602.py

@@ -0,0 +1,20 @@
+from subprocess import Popen, call, check_call, check_output, run
+
+# Check different Popen wrappers are checked.
+Popen("true", shell=True)
+call("true", shell=True)
+check_call("true", shell=True)
+check_output("true", shell=True)
+run("true", shell=True)
+
+# Check values that truthy values are treated as true.
+Popen("true", shell=1)
+Popen("true", shell=[1])
+Popen("true", shell={1: 1})
+Popen("true", shell=(1,))
+
+# Check command argument looks unsafe.
+var_string = "true"
+Popen(var_string, shell=True)
+Popen([var_string], shell=True)
+Popen([var_string, ""], shell=True)

crates/ruff/resources/test/fixtures/flake8_bandit/S603.py

@@ -0,0 +1,20 @@
+from subprocess import Popen, call, check_call, check_output, run
+
+# Different Popen wrappers are checked.
+Popen("true", shell=False)
+call("true", shell=False)
+check_call("true", shell=False)
+check_output("true", shell=False)
+run("true", shell=False)
+
+# Values that falsey values are treated as false.
+Popen("true", shell=0)
+Popen("true", shell=[])
+Popen("true", shell={})
+Popen("true", shell=None)
+
+# Unknown values are treated as falsey.
+Popen("true", shell=True if True else False)
+
+# No value is also caught.
+Popen("true")

crates/ruff/resources/test/fixtures/flake8_bandit/S604.py

@@ -0,0 +1,5 @@
+def foo(shell):
+    pass
+
+
+foo(shell=True)

crates/ruff/resources/test/fixtures/flake8_bandit/S605.py

@@ -0,0 +1,25 @@
+import os
+
+import commands
+import popen2
+
+# Check all shell functions.
+os.system("true")
+os.popen("true")
+os.popen2("true")
+os.popen3("true")
+os.popen4("true")
+popen2.popen2("true")
+popen2.popen3("true")
+popen2.popen4("true")
+popen2.Popen3("true")
+popen2.Popen4("true")
+commands.getoutput("true")
+commands.getstatusoutput("true")
+
+
+# Check command argument looks unsafe.
+var_string = "true"
+os.system(var_string)
+os.system([var_string])
+os.system([var_string, ""])

crates/ruff/resources/test/fixtures/flake8_bandit/S606.py

@@ -0,0 +1,20 @@
+import os
+
+# Check all shell functions.
+os.execl("true")
+os.execle("true")
+os.execlp("true")
+os.execlpe("true")
+os.execv("true")
+os.execve("true")
+os.execvp("true")
+os.execvpe("true")
+os.spawnl("true")
+os.spawnle("true")
+os.spawnlp("true")
+os.spawnlpe("true")
+os.spawnv("true")
+os.spawnve("true")
+os.spawnvp("true")
+os.spawnvpe("true")
+os.startfile("true")