Replace num_bigint with malachite

[malachite](https://www.malachite.rs/) is an arbitrary precision crate that unlike num_bigint implement as small integer optimization. This avoids allocating a `Vec` for every single number parse and instead only allocates for rare unusually large numbers.

This is also a correctness improvement since we'd previously just ignore the higher parts of unreasonably large numbers.

The disadvantage is that malachite is slow to compile.

.cargo/config.toml

@@ -1,3 +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"
+]

.config/nextest.toml

@@ -1,8 +0,0 @@
-[profile.ci]
-# Print out output for failing tests as soon as they fail, and also at the end
-# of the run (for easy scrollability).
-failure-output = "immediate-final"
-# Do not cancel the test run on the first failure.
-fail-fast = false
-
-status-level = "skip"

.gitattributes

@@ -1,10 +1,7 @@
 * text=auto eol=lf
 
-crates/ruff_linter/resources/test/fixtures/isort/line_ending_crlf.py text eol=crlf
-crates/ruff_linter/resources/test/fixtures/pycodestyle/W605_1.py text eol=crlf
-
-crates/ruff_python_formatter/resources/test/fixtures/ruff/docstring_code_examples_crlf.py text eol=crlf
-crates/ruff_python_formatter/tests/snapshots/format@docstring_code_examples_crlf.py.snap text eol=crlf
+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
 *.md.snap linguist-language=Markdown

.github/CODEOWNERS

@@ -6,4 +6,4 @@
 # - Order is important. The last matching pattern has the most precedence.
 
 # Jupyter
-/crates/ruff_linter/src/jupyter/ @dhruvmanila
+/crates/ruff/src/jupyter/ @dhruvmanila

.github/dependabot.yml

@@ -5,17 +5,9 @@ updates:
     schedule:
       interval: "weekly"
     labels: ["internal"]
-    groups:
-      actions:
-        patterns:
-          - "*"
-    ignore:
-      # The latest versions of these are not compatible with our release workflow
-      - dependency-name: "actions/upload-artifact"
-      - dependency-name: "actions/download-artifact"
 
   - package-ecosystem: "cargo"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "daily"
     labels: ["internal"]

.github/release.yml

@@ -0,0 +1,28 @@
+# https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes#configuring-automatically-generated-release-notes
+changelog:
+  exclude:
+    labels:
+      - internal
+      - documentation
+      - formatter
+  categories:
+    - title: Breaking Changes
+      labels:
+        - breaking
+    - title: Rules
+      labels:
+        - rule
+        - autofix
+    - title: Settings
+      labels:
+        - configuration
+        - cli
+    - title: Bug Fixes
+      labels:
+        - bug
+    - title: Preview
+      labels:
+        - preview
+    - title: Other Changes
+      labels:
+        - "*"

.github/workflows/ci.yaml

@@ -23,19 +23,14 @@ jobs:
     name: "Determine changes"
     runs-on: ubuntu-latest
     outputs:
-      # Flag that is raised when any code that affects linter is changed
       linter: ${{ steps.changed.outputs.linter_any_changed }}
-      # Flag that is raised when any code that affects formatter is changed
       formatter: ${{ steps.changed.outputs.formatter_any_changed }}
-      # Flag that is raised when any code is changed
-      # This is superset of the linter and formatter
-      code: ${{ steps.changed.outputs.code_any_changed }}
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - uses: tj-actions/changed-files@v42
+      - uses: tj-actions/changed-files@v39
         id: changed
         with:
           files_yaml: |
@@ -48,8 +43,6 @@ jobs:
               - "!crates/ruff_dev/**"
               - "!crates/ruff_shrinking/**"
               - scripts/*
-              - python/**
-              - .github/workflows/ci.yaml
 
             formatter:
               - Cargo.toml
@@ -64,19 +57,10 @@ jobs:
               - crates/ruff_python_parser/**
               - crates/ruff_dev/**
               - scripts/*
-              - python/**
-              - .github/workflows/ci.yaml
-
-            code:
-              - "**/*"
-              - "!**/*.md"
-              - "!docs/**"
-              - "!assets/**"
 
   cargo-fmt:
     name: "cargo fmt"
     runs-on: ubuntu-latest
-    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -86,9 +70,6 @@ jobs:
   cargo-clippy:
     name: "cargo clippy"
     runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -97,79 +78,73 @@ jobs:
           rustup target add wasm32-unknown-unknown
       - uses: Swatinem/rust-cache@v2
       - name: "Clippy"
-        run: cargo clippy --workspace --all-targets --all-features --locked -- -D warnings
+        run: cargo clippy --workspace --all-targets --all-features -- -D warnings
       - name: "Clippy (wasm)"
-        run: cargo clippy -p ruff_wasm --target wasm32-unknown-unknown --all-features --locked -- -D warnings
+        run: cargo clippy -p ruff_wasm --target wasm32-unknown-unknown --all-features -- -D warnings
 
-  cargo-test-linux:
-    name: "cargo test (linux)"
-    runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 20
+  cargo-test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    name: "cargo test | ${{ matrix.os }}"
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
         run: rustup show
-      - name: "Install mold"
-        uses: rui314/setup-mold@v1
-      - name: "Install cargo nextest"
-        uses: taiki-e/install-action@v2
-        with:
-          tool: cargo-nextest
       - name: "Install cargo insta"
         uses: taiki-e/install-action@v2
         with:
           tool: cargo-insta
+      - run: pip install black[d]==23.1.0
       - uses: Swatinem/rust-cache@v2
-      - name: "Run tests"
+      - name: "Run tests (Ubuntu)"
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+        run: cargo insta test --all --all-features --unreferenced reject
+      - name: "Run tests (Windows)"
+        if: ${{ matrix.os == 'windows-latest' }}
         shell: bash
-        env:
-          NEXTEST_PROFILE: "ci"
-        run: cargo insta test --all-features --unreferenced reject --test-runner nextest
-
+        # We can't reject unreferenced snapshots on windows because flake8_executable can't run on windows
+        run: cargo insta test --all --all-features
+      - run: cargo test --package ruff_cli --test black_compatibility_test -- --ignored
+        # TODO: Skipped as it's currently broken. The resource were moved from the
+        # ruff_cli to ruff crate, but this test was not updated.
+        if: false
       # 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-windows:
-    name: "cargo test (windows)"
-    runs-on: windows-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 20
+  cargo-fuzz:
+    runs-on: ubuntu-latest
+    name: "cargo fuzz"
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
         run: rustup show
-      - name: "Install cargo nextest"
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: "fuzz -> target"
+      - name: "Install cargo-fuzz"
         uses: taiki-e/install-action@v2
         with:
-          tool: cargo-nextest
-      - uses: Swatinem/rust-cache@v2
-      - name: "Run tests"
-        shell: bash
-        run: |
-          cargo nextest run --all-features --profile ci
-          cargo test --all-features --doc
+          tool: cargo-fuzz@0.11
+      - run: cargo fuzz build -s none
 
   cargo-test-wasm:
-    name: "cargo test (wasm)"
     runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 10
+    name: "cargo test (wasm)"
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
         run: rustup target add wasm32-unknown-unknown
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v3
         with:
           node-version: 18
           cache: "npm"
@@ -181,31 +156,9 @@ jobs:
           cd crates/ruff_wasm
           wasm-pack test --node
 
-  cargo-fuzz:
-    name: "cargo fuzz"
-    runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 10
-    steps:
-      - uses: actions/checkout@v4
-      - name: "Install Rust toolchain"
-        run: rustup show
-      - uses: Swatinem/rust-cache@v2
-        with:
-          workspaces: "fuzz -> target"
-      - name: "Install cargo-fuzz"
-        uses: taiki-e/install-action@v2
-        with:
-          tool: cargo-fuzz@0.11.2
-      - run: cargo fuzz build -s none
-
   scripts:
     name: "test scripts"
     runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 5
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -224,104 +177,38 @@ jobs:
     name: "ecosystem"
     runs-on: ubuntu-latest
     needs:
-      - cargo-test-linux
+      - cargo-test
       - determine_changes
     # Only runs on pull requests, since that is the only we way we can find the base version for comparison.
-    # Ecosystem check needs linter and/or formatter changes.
-    if: github.event_name == 'pull_request' && ${{
-      needs.determine_changes.outputs.code == 'true'
-      }}
-    timeout-minutes: 20
+    if: github.event_name == 'pull_request' && needs.determine_changes.outputs.linter == 'true'
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
       - uses: actions/download-artifact@v3
-        name: Download comparison Ruff binary
+        name: Download Ruff binary
         id: ruff-target
         with:
           name: ruff
           path: target/debug
 
-      - uses: dawidd6/action-download-artifact@v3
-        name: Download baseline Ruff binary
+      - uses: dawidd6/action-download-artifact@v2
+        name: Download base results
         with:
           name: ruff
           branch: ${{ github.event.pull_request.base.ref }}
           check_artifacts: true
 
-      - name: Install ruff-ecosystem
-        run: |
-          pip install ./python/ruff-ecosystem
-
-      - name: Run `ruff check` stable ecosystem check
-        if: ${{ needs.determine_changes.outputs.linter == '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
+          chmod +x ruff ${{ steps.ruff-target.outputs.download-path }}/ruff
 
-          # Set pipefail to avoid hiding errors with tee
-          set -eo pipefail
+          scripts/check_ecosystem.py ruff ${{ steps.ruff-target.outputs.download-path }}/ruff | tee ecosystem-result
+          cat ecosystem-result > $GITHUB_STEP_SUMMARY
 
-          ruff-ecosystem check ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff --cache ./checkouts --output-format markdown | tee ecosystem-result-check-stable
-
-          cat ecosystem-result-check-stable > $GITHUB_STEP_SUMMARY
-          echo "### Linter (stable)"  > ecosystem-result
-          cat ecosystem-result-check-stable >> ecosystem-result
-          echo "" >> ecosystem-result
-
-      - name: Run `ruff check` preview ecosystem check
-        if: ${{ needs.determine_changes.outputs.linter == 'true' }}
-        run: |
-          # Make executable, since artifact download doesn't preserve this
-          chmod +x ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff
-
-          # Set pipefail to avoid hiding errors with tee
-          set -eo pipefail
-
-          ruff-ecosystem check ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff --cache ./checkouts --output-format markdown --force-preview | tee ecosystem-result-check-preview
-
-          cat ecosystem-result-check-preview > $GITHUB_STEP_SUMMARY
-          echo "### Linter (preview)" >> ecosystem-result
-          cat ecosystem-result-check-preview >> ecosystem-result
-          echo "" >> ecosystem-result
-
-      - name: Run `ruff format` stable ecosystem check
-        if: ${{ needs.determine_changes.outputs.formatter == 'true' }}
-        run: |
-          # Make executable, since artifact download doesn't preserve this
-          chmod +x ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff
-
-          # Set pipefail to avoid hiding errors with tee
-          set -eo pipefail
-
-          ruff-ecosystem format ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff --cache ./checkouts --output-format markdown | tee ecosystem-result-format-stable
-
-          cat ecosystem-result-format-stable > $GITHUB_STEP_SUMMARY
-          echo "### Formatter (stable)" >> ecosystem-result
-          cat ecosystem-result-format-stable >> ecosystem-result
-          echo "" >> ecosystem-result
-
-      - name: Run `ruff format` preview ecosystem check
-        if: ${{ needs.determine_changes.outputs.formatter == 'true' }}
-        run: |
-          # Make executable, since artifact download doesn't preserve this
-          chmod +x ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff
-
-          # Set pipefail to avoid hiding errors with tee
-          set -eo pipefail
-
-          ruff-ecosystem format ./ruff ${{ steps.ruff-target.outputs.download-path }}/ruff --cache ./checkouts --output-format markdown --force-preview | tee ecosystem-result-format-preview
-
-          cat ecosystem-result-format-preview > $GITHUB_STEP_SUMMARY
-          echo "### Formatter (preview)" >> ecosystem-result
-          cat ecosystem-result-format-preview >> ecosystem-result
-          echo "" >> ecosystem-result
-
-      - name: Export pull request number
-        run: |
           echo ${{ github.event.number }} > pr-number
 
       - uses: actions/upload-artifact@v3
@@ -339,27 +226,23 @@ jobs:
   cargo-udeps:
     name: "cargo udeps"
     runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - name: "Install nightly Rust toolchain"
         # Only pinned to make caching work, update freely
-        run: rustup toolchain install nightly-2023-10-15
+        run: rustup toolchain install nightly-2023-06-08
       - uses: Swatinem/rust-cache@v2
       - name: "Install cargo-udeps"
         uses: taiki-e/install-action@cargo-udeps
       - name: "Run cargo-udeps"
-        run: cargo +nightly-2023-10-15 udeps
+        run: cargo +nightly-2023-06-08 udeps
 
   python-package:
     name: "python package"
     runs-on: ubuntu-latest
-    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -381,10 +264,9 @@ jobs:
   pre-commit:
     name: "pre-commit"
     runs-on: ubuntu-latest
-    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Install Rust toolchain"
@@ -393,7 +275,7 @@ jobs:
       - name: "Install pre-commit"
         run: pip install pre-commit
       - name: "Cache pre-commit"
-        uses: actions/cache@v4
+        uses: actions/cache@v3
         with:
           path: ~/.cache/pre-commit
           key: pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
@@ -410,15 +292,14 @@ jobs:
   docs:
     name: "mkdocs"
     runs-on: ubuntu-latest
-    timeout-minutes: 10
     env:
       MKDOCS_INSIDERS_SSH_KEY_EXISTS: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY != '' }}
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
       - name: "Add SSH key"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
-        uses: webfactory/ssh-agent@v0.9.0
+        uses: webfactory/ssh-agent@v0.8.0
         with:
           ssh-private-key: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY }}
       - name: "Install Rust toolchain"
@@ -441,14 +322,13 @@ jobs:
         run: mkdocs build --strict -f mkdocs.insiders.yml
       - name: "Build docs"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS != 'true' }}
-        run: mkdocs build --strict -f mkdocs.public.yml
+        run: mkdocs build --strict -f mkdocs.generated.yml
 
-  check-formatter-instability-and-black-similarity:
-    name: "formatter instabilities and black similarity"
+  check-formatter-ecosystem:
+    name: "Formatter ecosystem and progress checks"
     runs-on: ubuntu-latest
     needs: determine_changes
     if: needs.determine_changes.outputs.formatter == 'true' || github.ref == 'refs/heads/main'
-    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
@@ -462,54 +342,8 @@ jobs:
       - name: "Remove checkouts from cache"
         run: rm -r target/progress_projects
 
-  check-ruff-lsp:
-    name: "test ruff-lsp"
-    runs-on: ubuntu-latest
-    timeout-minutes: 5
-    needs:
-      - cargo-test-linux
-      - determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    steps:
-      - uses: extractions/setup-just@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - uses: actions/checkout@v4
-        name: "Download ruff-lsp source"
-        with:
-          repository: "astral-sh/ruff-lsp"
-
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
-
-      - uses: actions/download-artifact@v3
-        name: Download development ruff binary
-        id: ruff-target
-        with:
-          name: ruff
-          path: target/debug
-
-      - name: Install ruff-lsp dependencies
-        run: |
-          just install
-
-      - name: Run ruff-lsp tests
-        run: |
-          # Setup development binary
-          pip uninstall --yes ruff
-          chmod +x ${{ steps.ruff-target.outputs.download-path }}/ruff
-          export PATH=${{ steps.ruff-target.outputs.download-path }}:$PATH
-          ruff version
-
-          just test
-
   benchmarks:
     runs-on: ubuntu-latest
-    needs: determine_changes
-    if: ${{ needs.determine_changes.outputs.code == 'true' || github.ref == 'refs/heads/main' }}
-    timeout-minutes: 20
     steps:
       - name: "Checkout Branch"
         uses: actions/checkout@v4
@@ -528,7 +362,7 @@ jobs:
         run: cargo codspeed build --features codspeed -p ruff_benchmark
 
       - name: "Run benchmarks"
-        uses: CodSpeedHQ/action@v2
+        uses: CodSpeedHQ/action@v1
         with:
           run: cargo codspeed run
           token: ${{ secrets.CODSPEED_TOKEN }}

.github/workflows/docs.yaml

@@ -20,10 +20,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.ref }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
       - name: "Add SSH key"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS == 'true' }}
-        uses: webfactory/ssh-agent@v0.9.0
+        uses: webfactory/ssh-agent@v0.8.0
         with:
           ssh-private-key: ${{ secrets.MKDOCS_INSIDERS_SSH_KEY }}
       - name: "Install Rust toolchain"
@@ -44,10 +44,10 @@ jobs:
         run: mkdocs build --strict -f mkdocs.insiders.yml
       - name: "Build docs"
         if: ${{ env.MKDOCS_INSIDERS_SSH_KEY_EXISTS != 'true' }}
-        run: mkdocs build --strict -f mkdocs.public.yml
+        run: mkdocs build --strict -f mkdocs.generated.yml
       - name: "Deploy to Cloudflare Pages"
         if: ${{ env.CF_API_TOKEN_EXISTS == 'true' }}
-        uses: cloudflare/wrangler-action@v3.4.1
+        uses: cloudflare/wrangler-action@v3.1.1
         with:
           apiToken: ${{ secrets.CF_API_TOKEN }}
           accountId: ${{ secrets.CF_ACCOUNT_ID }}

.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: "3.11"
+  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@v4
+      - 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@v4
+      - 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@v4
+      - 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@v4
+      - 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@v4
+      - 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@v4
+      - 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@v4
+      - 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

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: "Install Rust toolchain"
         run: rustup target add wasm32-unknown-unknown
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v3
         with:
           node-version: 18
           cache: "npm"
@@ -40,9 +40,8 @@ jobs:
         working-directory: playground
       - name: "Deploy to Cloudflare Pages"
         if: ${{ env.CF_API_TOKEN_EXISTS == 'true' }}
-        uses: cloudflare/wrangler-action@v3.4.1
+        uses: cloudflare/wrangler-action@v3.1.1
         with:
           apiToken: ${{ secrets.CF_API_TOKEN }}
           accountId: ${{ secrets.CF_ACCOUNT_ID }}
-          # `github.head_ref` is only set during pull requests and for manual runs or tags we use `main` to deploy to production
-          command: pages deploy playground/dist --project-name=ruff-playground --branch ${{ github.head_ref || 'main' }} --commit-hash ${GITHUB_SHA}
+          command: pages deploy playground/dist --project-name=ruff-playground --branch ${GITHUB_HEAD_REF} --commit-hash ${GITHUB_SHA}

.github/workflows/pr-comment.yaml

@@ -1,4 +1,4 @@
-name: Ecosystem check comment
+name: PR Check Comment
 
 on:
   workflow_run:
@@ -17,14 +17,14 @@ jobs:
   comment:
     runs-on: ubuntu-latest
     steps:
-      - uses: dawidd6/action-download-artifact@v3
-        name: Download pull request number
+      - 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: Parse pull request number
+      - name: Extract PR Number
         id: pr-number
         run: |
           if [[ -f pr-number ]]
@@ -32,8 +32,8 @@ jobs:
             echo "pr-number=$(<pr-number)" >> $GITHUB_OUTPUT
           fi
 
-      - uses: dawidd6/action-download-artifact@v3
-        name: "Download ecosystem results"
+      - uses: dawidd6/action-download-artifact@v2
+        name: "Download Ecosystem Result"
         id: download-ecosystem-result
         if: steps.pr-number.outputs.pr-number
         with:
@@ -41,18 +41,15 @@ jobs:
           workflow: ci.yaml
           pr: ${{ steps.pr-number.outputs.pr-number }}
           path: pr/ecosystem
-          workflow_conclusion: completed
           if_no_artifact_found: ignore
 
-      - name: Generate comment content
+      - name: Generate Comment
         id: generate-comment
         if: steps.download-ecosystem-result.outputs.found_artifact == 'true'
         run: |
-          # Note this identifier is used to find the comment to update on
-          # subsequent runs
-          echo '<!-- generated-comment ecosystem -->' >> comment.txt
+          echo '## PR Check Results' >> comment.txt
 
-          echo '## `ruff-ecosystem` results' >> comment.txt
+          echo "### Ecosystem" >> comment.txt
           cat pr/ecosystem/ecosystem-result >> comment.txt
           echo "" >> comment.txt
 
@@ -60,18 +57,18 @@ jobs:
           cat comment.txt >> $GITHUB_OUTPUT
           echo 'EOF' >> $GITHUB_OUTPUT
 
-      - name: Find existing comment
-        uses: peter-evans/find-comment@v3
+      - name: Find Comment
+        uses: peter-evans/find-comment@v2
         if: steps.generate-comment.outcome == 'success'
         id: find-comment
         with:
           issue-number: ${{ steps.pr-number.outputs.pr-number }}
           comment-author: "github-actions[bot]"
-          body-includes: "<!-- generated-comment ecosystem -->"
+          body-includes: PR Check Results
 
       - name: Create or update comment
         if: steps.find-comment.outcome == 'success'
-        uses: peter-evans/create-or-update-comment@v4
+        uses: peter-evans/create-or-update-comment@v3
         with:
           comment-id: ${{ steps.find-comment.outputs.comment-id }}
           issue-number: ${{ steps.pr-number.outputs.pr-number }}

.github/workflows/release.yaml

@@ -36,7 +36,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Prep README.md"
@@ -48,6 +48,7 @@ jobs:
           args: --out dist
       - name: "Test sdist"
         run: |
+          rustup default $(cat rust-toolchain)
           pip install dist/${{ env.PACKAGE_NAME }}-*.tar.gz --force-reinstall
           ruff --help
           python -m ruff --help
@@ -63,7 +64,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -73,7 +74,7 @@ jobs:
         uses: PyO3/maturin-action@v1
         with:
           target: x86_64
-          args: --release --locked --out dist
+          args: --release --out dist
       - name: "Test wheel - x86_64"
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
@@ -86,7 +87,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-x86_64-apple-darwin.tar.gz
+          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"
@@ -103,7 +104,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -112,7 +113,7 @@ jobs:
       - name: "Build wheels - universal2"
         uses: PyO3/maturin-action@v1
         with:
-          args: --release --locked --target universal2-apple-darwin --out dist
+          args: --release --target universal2-apple-darwin --out dist
       - name: "Test wheel - universal2"
         run: |
           pip install dist/${{ env.PACKAGE_NAME }}-*universal2.whl --force-reinstall
@@ -125,7 +126,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-aarch64-apple-darwin.tar.gz
+          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"
@@ -151,7 +152,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: ${{ matrix.platform.arch }}
@@ -161,7 +162,7 @@ jobs:
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
-          args: --release --locked --out dist
+          args: --release --out dist
       - name: "Test wheel"
         if: ${{ !startsWith(matrix.platform.target, 'aarch64') }}
         shell: bash
@@ -177,7 +178,7 @@ jobs:
       - name: "Archive binary"
         shell: bash
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.platform.target }}.zip
+          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.zip
           7z a $ARCHIVE_FILE ./target/${{ matrix.platform.target }}/release/ruff.exe
           sha256sum $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -199,7 +200,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -210,7 +211,7 @@ jobs:
         with:
           target: ${{ matrix.target }}
           manylinux: auto
-          args: --release --locked --out dist
+          args: --release --out dist
       - name: "Test wheel"
         if: ${{ startsWith(matrix.target, 'x86_64') }}
         run: |
@@ -224,7 +225,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ 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"
@@ -258,7 +259,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Prep README.md"
@@ -269,7 +270,7 @@ jobs:
           target: ${{ matrix.platform.target }}
           manylinux: auto
           docker-options: ${{ matrix.platform.maturin_docker_options }}
-          args: --release --locked --out dist
+          args: --release --out dist
       - uses: uraimo/run-on-arch-action@v2
         if: matrix.platform.arch != 'ppc64'
         name: Test wheel
@@ -291,7 +292,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.platform.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ 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"
@@ -313,7 +314,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           architecture: x64
@@ -324,7 +325,7 @@ jobs:
         with:
           target: ${{ matrix.target }}
           manylinux: musllinux_1_2
-          args: --release --locked --out dist
+          args: --release --out dist
       - name: "Test wheel"
         if: matrix.target == 'x86_64-unknown-linux-musl'
         uses: addnab/docker-run-action@v3
@@ -332,10 +333,10 @@ jobs:
           image: alpine:latest
           options: -v ${{ github.workspace }}:/io -w /io
           run: |
-            apk add python3
-            python -m venv .venv
-            .venv/bin/pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-            .venv/bin/ruff check --help
+            apk add py3-pip
+            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links /io/dist/ --force-reinstall
+            ruff --help
+            python -m ruff --help
       - name: "Upload wheels"
         uses: actions/upload-artifact@v3
         with:
@@ -343,7 +344,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ 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"
@@ -369,7 +370,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.sha }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: "Prep README.md"
@@ -379,7 +380,7 @@ jobs:
         with:
           target: ${{ matrix.platform.target }}
           manylinux: musllinux_1_2
-          args: --release --locked --out dist
+          args: --release --out dist
           docker-options: ${{ matrix.platform.maturin_docker_options }}
       - uses: uraimo/run-on-arch-action@v2
         name: Test wheel
@@ -388,11 +389,10 @@ jobs:
           distro: alpine_latest
           githubToken: ${{ github.token }}
           install: |
-            apk add python3
+            apk add py3-pip
           run: |
-            python -m venv .venv
-            .venv/bin/pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
-            .venv/bin/ruff check --help
+            pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
+            ruff check --help
       - name: "Upload wheels"
         uses: actions/upload-artifact@v3
         with:
@@ -400,7 +400,7 @@ jobs:
           path: dist
       - name: "Archive binary"
         run: |
-          ARCHIVE_FILE=ruff-${{ inputs.tag }}-${{ matrix.platform.target }}.tar.gz
+          ARCHIVE_FILE=ruff-${{ matrix.platform.target }}.tar.gz
           tar czvf $ARCHIVE_FILE -C target/${{ matrix.platform.target }}/release ruff
           shasum -a 256 $ARCHIVE_FILE > $ARCHIVE_FILE.sha256
       - name: "Upload binary"
@@ -517,62 +517,6 @@ jobs:
           files: binaries/*
           tag_name: v${{ inputs.tag }}
 
-  docker-publish:
-    # This action doesn't need to wait on any other task, it's easy to re-tag if something failed and we're validating
-    # the tag here also
-    name: Push Docker image ghcr.io/astral-sh/ruff
-    runs-on: ubuntu-latest
-    environment:
-      name: release
-    permissions:
-      # For the docker push
-      packages: write
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          ref: ${{ inputs.sha }}
-
-      - uses: docker/setup-buildx-action@v3
-
-      - uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ghcr.io/astral-sh/ruff
-
-      - name: Check tag consistency
-        # Unlike validate-tag we don't check if the commit is on the main branch, but it seems good enough since we can
-        # change docker tags
-        if: ${{ inputs.tag }}
-        run: |
-          version=$(grep "version = " pyproject.toml | sed -e 's/version = "\(.*\)"/\1/g')
-          if [ "${{ inputs.tag }}" != "${version}" ]; then
-            echo "The input tag does not match the version from pyproject.toml:" >&2
-            echo "${{ inputs.tag }}" >&2
-            echo "${version}" >&2
-            exit 1
-          else
-            echo "Releasing ${version}"
-          fi
-
-      - name: "Build and push Docker image"
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          platforms: linux/amd64,linux/arm64
-          # Reuse the builder
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          push: ${{ inputs.tag != '' }}
-          tags: ghcr.io/astral-sh/ruff:latest,ghcr.io/astral-sh/ruff:${{ inputs.tag || 'dry-run' }}
-          labels: ${{ steps.meta.outputs.labels }}
-
   # 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:
@@ -581,7 +525,7 @@ jobs:
     needs: publish-release
     steps:
       - name: "Update pre-commit mirror"
-        uses: actions/github-script@v7
+        uses: actions/github-script@v6
         with:
           github-token: ${{ secrets.RUFF_PRE_COMMIT_PAT }}
           script: |

.gitignore

@@ -1,5 +1,5 @@
 # Benchmarking cpython (CONTRIBUTING.md)
-crates/ruff_linter/resources/test/cpython
+crates/ruff/resources/test/cpython
 # generate_mkdocs.py
 mkdocs.generated.yml
 # check_ecosystem.py
@@ -208,9 +208,3 @@ cython_debug/
 # VIM
 .*.sw?
 .sw?
-
-# Custom re-inclusions for the resolver test cases
-!crates/ruff_python_resolver/resources/test/airflow/venv/
-!crates/ruff_python_resolver/resources/test/airflow/venv/lib
-!crates/ruff_python_resolver/resources/test/airflow/venv/lib/python3.11/site-packages/_watchdog_fsevents.cpython-311-darwin.so
-!crates/ruff_python_resolver/resources/test/airflow/venv/lib/python3.11/site-packages/orjson/orjson.cpython-311-darwin.so

.markdownlint.yaml

@@ -13,8 +13,3 @@ MD041: false
 
 # MD013/line-length
 MD013: false
-
-# MD024/no-duplicate-heading
-MD024:
-  # Allow when nested under different parents e.g. CHANGELOG.md
-  allow_different_nesting: true

.pre-commit-config.yaml

@@ -2,9 +2,9 @@ fail_fast: true
 
 exclude: |
   (?x)^(
-    crates/ruff_linter/resources/.*|
-    crates/ruff_linter/src/rules/.*/snapshots/.*|
     crates/ruff/resources/.*|
+    crates/ruff/src/rules/.*/snapshots/.*|
+    crates/ruff_cli/resources/.*|
     crates/ruff_python_formatter/resources/.*|
     crates/ruff_python_formatter/tests/snapshots/.*|
     crates/ruff_python_resolver/resources/.*|
@@ -13,35 +13,24 @@ exclude: |
 
 repos:
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: v0.15
+    rev: v0.12.1
     hooks:
       - id: validate-pyproject
 
   - repo: https://github.com/executablebooks/mdformat
-    rev: 0.7.17
+    rev: 0.7.16
     hooks:
       - id: mdformat
         additional_dependencies:
           - mdformat-mkdocs
-          - mdformat-admon
-        exclude: |
-          (?x)^(
-            docs/formatter/black\.md
-            | docs/\w+\.md
-          )$
 
   - repo: https://github.com/igorshubovych/markdownlint-cli
-    rev: v0.37.0
+    rev: v0.33.0
     hooks:
       - id: markdownlint-fix
-        exclude: |
-          (?x)^(
-            docs/formatter/black\.md
-            | docs/\w+\.md
-          )$
 
   - repo: https://github.com/crate-ci/typos
-    rev: v1.16.22
+    rev: v1.14.12
     hooks:
       - id: typos
 
@@ -53,24 +42,27 @@ repos:
         language: system
         types: [rust]
         pass_filenames: false # This makes it a lot faster
-
-  - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.1.4
-    hooks:
-      - id: ruff-format
       - id: ruff
-        args: [--fix, --exit-non-zero-on-fix]
+        name: ruff
+        entry: cargo run --bin ruff -- check --no-cache --force-exclude --fix --exit-non-zero-on-fix
+        language: system
         types_or: [python, pyi]
         require_serial: true
         exclude: |
           (?x)^(
-            crates/ruff_linter/resources/.*|
+            crates/ruff/resources/.*|
             crates/ruff_python_formatter/resources/.*
           )$
 
+  # Black
+  - repo: https://github.com/psf/black
+    rev: 23.1.0
+    hooks:
+      - id: black
+
   # Prettier
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: v3.0.3
+    rev: v3.0.0
     hooks:
       - id: prettier
         types: [yaml]

BREAKING_CHANGES.md

@@ -1,72 +1,5 @@
 # Breaking Changes
 
-## 0.1.9
-
-### `site-packages` is now excluded by default ([#5513](https://github.com/astral-sh/ruff/pull/5513))
-
-Ruff maintains a list of default exclusions, which now consists of the following patterns:
-
-- `.bzr`
-- `.direnv`
-- `.eggs`
-- `.git-rewrite`
-- `.git`
-- `.hg`
-- `.ipynb_checkpoints`
-- `.mypy_cache`
-- `.nox`
-- `.pants.d`
-- `.pyenv`
-- `.pytest_cache`
-- `.pytype`
-- `.ruff_cache`
-- `.svn`
-- `.tox`
-- `.venv`
-- `.vscode`
-- `__pypackages__`
-- `_build`
-- `buck-out`
-- `build`
-- `dist`
-- `node_modules`
-- `site-packages`
-- `venv`
-
-Previously, the `site-packages` directory was not excluded by default. While `site-packages` tends
-to be excluded anyway by virtue of the `.venv` exclusion, this may not be the case when using Ruff
-from VS Code outside a virtual environment.
-
-## 0.1.0
-
-### The deprecated `format` setting has been removed
-
-Ruff previously used the `format` setting, `--format` CLI option, and `RUFF_FORMAT` environment variable to
-configure the output format of the CLI. This usage was deprecated in `v0.0.291` — the `format` setting is now used
-to control Ruff's code formatting. As of this release:
-
-- The `format` setting cannot be used to configure the output format, use `output-format` instead
-- The `RUFF_FORMAT` environment variable is ignored, use `RUFF_OUTPUT_FORMAT` instead
-- The `--format` option has been removed from `ruff check`, use `--output-format` instead
-
-### Unsafe fixes are not applied by default ([#7769](https://github.com/astral-sh/ruff/pull/7769))
-
-Ruff labels fixes as "safe" and "unsafe". The meaning and intent of your code will be retained when applying safe
-fixes, but the meaning could be changed when applying unsafe fixes. Previously, unsafe fixes were always displayed
-and applied when fixing was enabled. Now, unsafe fixes are hidden by default and not applied. The `--unsafe-fixes`
-flag or `unsafe-fixes` configuration option can be used to enable unsafe fixes.
-
-See the [docs](https://docs.astral.sh/ruff/configuration/#fix-safety) for details.
-
-### Remove formatter-conflicting rules from the default rule set  ([#7900](https://github.com/astral-sh/ruff/pull/7900))
-
-Previously, Ruff enabled all implemented rules in Pycodestyle (`E`) by default. Ruff now only includes the
-Pycodestyle prefixes `E4`, `E7`, and `E9` to exclude rules that conflict with automatic formatters. Consequently,
-the stable rule set no longer includes `line-too-long` (`E501`) and `mixed-spaces-and-tabs` (`E101`). Other
-excluded Pycodestyle rules include whitespace enforcement in `E1` and `E2`; these rules are currently in preview, and are already omitted by default.
-
-This change only affects those using Ruff under its default rule set. Users that include `E` in their `select` will experience no change in behavior.
-
 ## 0.0.288
 
 ### Remove support for emoji identifiers ([#7212](https://github.com/astral-sh/ruff/pull/7212))

CODE_OF_CONDUCT.md

@@ -72,7 +72,7 @@ representative at an online or offline event.
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
 reported to the community leaders responsible for enforcement at
-<charlie.r.marsh@gmail.com>.
+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

CONTRIBUTING.md

@@ -26,10 +26,6 @@ Welcome! We're happy to have you here. Thank you in advance for your contributio
 - [`cargo dev`](#cargo-dev)
 - [Subsystems](#subsystems)
     - [Compilation Pipeline](#compilation-pipeline)
-    - [Import Categorization](#import-categorization)
-        - [Project root](#project-root)
-        - [Package root](#package-root)
-        - [Import categorization](#import-categorization-1)
 
 ## The Basics
 
@@ -67,7 +63,7 @@ You'll also need [Insta](https://insta.rs/docs/) to update snapshot tests:
 cargo install cargo-insta
 ```
 
-And you'll need pre-commit to run some validation checks:
+and pre-commit to run some validation checks:
 
 ```shell
 pipx install pre-commit  # or `pip install pre-commit` if you have a virtualenv
@@ -80,22 +76,12 @@ when making a commit:
 pre-commit install
 ```
 
-We recommend [nextest](https://nexte.st/) to run Ruff's test suite (via `cargo nextest run`),
-though it's not strictly necessary:
-
-```shell
-cargo install cargo-nextest --locked
-```
-
-Throughout this guide, any usages of `cargo test` can be replaced with `cargo nextest run`,
-if you choose to install `nextest`.
-
 ### Development
 
 After cloning the repository, run Ruff locally from the repository root with:
 
 ```shell
-cargo run -p ruff -- check /path/to/file.py --no-cache
+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,
@@ -126,15 +112,15 @@ Ruff is structured as a monorepo with a [flat crate structure](https://matklad.g
 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_linter`). As a contributor, that's the crate that'll be most relevant to you.
+`crates/ruff`). As a contributor, that's the crate that'll be most relevant to you.
 
-At the time of writing, the repository includes the following crates:
+At time of writing, the repository includes the following crates:
 
-- `crates/ruff_linter`: library crate containing all lint rules and the core logic for running them.
+- `crates/ruff`: library crate containing all lint rules and the core logic for running them.
     If you're working on a rule, this is the crate for you.
 - `crates/ruff_benchmark`: binary crate for running micro-benchmarks.
 - `crates/ruff_cache`: library crate for caching lint results.
-- `crates/ruff`: binary crate containing Ruff's command-line interface.
+- `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`), see the [`cargo dev`](#cargo-dev) section below.
 - `crates/ruff_diagnostics`: library crate for the rule-independent abstractions in the lint
@@ -167,7 +153,7 @@ 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)
     (e.g., `AssertFalse`, as in, "allow `assert False`").
 
-1. Create a file for your rule (e.g., `crates/ruff_linter/src/rules/flake8_bugbear/rules/assert_false.rs`).
+1. Create a file for your rule (e.g., `crates/ruff/src/rules/flake8_bugbear/rules/assert_false.rs`).
 
 1. In that file, define a violation struct (e.g., `pub struct AssertFalse`). You can grep for
     `#[violation]` to see examples.
@@ -176,22 +162,21 @@ At a high level, the steps involved in adding a new lint rule are as follows:
     (e.g., `pub(crate) fn assert_false`) based on whatever inputs are required for the rule (e.g.,
     an `ast::StmtAssert` node).
 
-1. Define the logic for invoking the diagnostic in `crates/ruff_linter/src/checkers/ast/analyze` (for
-    AST-based rules), `crates/ruff_linter/src/checkers/tokens.rs` (for token-based rules),
-    `crates/ruff_linter/src/checkers/physical_lines.rs` (for text-based rules),
-    `crates/ruff_linter/src/checkers/filesystem.rs` (for filesystem-based rules), etc. For AST-based rules,
+1. Define the logic for invoking the diagnostic in `crates/ruff/src/checkers/ast/analyze` (for
+    AST-based rules), `crates/ruff/src/checkers/tokens.rs` (for token-based rules),
+    `crates/ruff/src/checkers/physical_lines.rs` (for text-based rules),
+    `crates/ruff/src/checkers/filesystem.rs` (for filesystem-based rules), etc. For AST-based rules,
     you'll likely want to modify `analyze/statement.rs` (if your rule is based on analyzing
     statements, like imports) or `analyze/expression.rs` (if your rule is based on analyzing
     expressions, like function calls).
 
-1. Map the violation struct to a rule code in `crates/ruff_linter/src/codes.rs` (e.g., `B011`). New rules
-    should be added in `RuleGroup::Preview`.
+1. Map the violation struct to a rule code in `crates/ruff/src/codes.rs` (e.g., `B011`).
 
 1. Add proper [testing](#rule-testing-fixtures-and-snapshots) for your rule.
 
 1. Update the generated files (documentation and generated code).
 
-To trigger the violation, you'll likely want to augment the logic in `crates/ruff_linter/src/checkers/ast.rs`
+To trigger the violation, you'll likely want to augment the logic in `crates/ruff/src/checkers/ast.rs`
 to call your new function at the appropriate time and with the appropriate inputs. The `Checker`
 defined therein is a Python AST visitor, which iterates over the AST, building up a semantic model,
 and calling out to lint rule analyzer functions as it goes.
@@ -219,7 +204,7 @@ As such, rule names should...
     For example, `AssertFalse` guards against `assert False` statements.
 
 - _Not_ contain instructions on how to fix the violation, which instead belong in the rule
-    documentation and the `fix_title`.
+    documentation and the `autofix_title`.
 
 - _Not_ contain a redundant prefix, like `Disallow` or `Banned`, which are already implied by the
     convention.
@@ -236,7 +221,7 @@ 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_linter/resources/test/fixtures/[linter]` that contains the code you
+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.
 
@@ -245,16 +230,16 @@ Once you've completed the code for the rule itself, you can define tests with th
     For example, if you're adding a new rule named `E402`, you would run:
 
     ```shell
-    cargo run -p ruff -- check crates/ruff_linter/resources/test/fixtures/pycodestyle/E402.py --no-cache --preview --select E402
+    cargo run -p ruff_cli -- check crates/ruff/resources/test/fixtures/pycodestyle/E402.py --no-cache --select E402
     ```
 
     **Note:** Only a subset of rules are enabled by default. When testing a new rule, ensure that
     you activate it by adding `--select ${rule_code}` to the command.
 
-1. Add the test to the relevant `crates/ruff_linter/src/rules/[linter]/mod.rs` file. If you're contributing
+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_linter/src/rules/flake8_bugbear/mod.rs`)
+    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,
@@ -266,24 +251,25 @@ Once you've completed the code for the rule itself, you can define tests with th
 
 Ruff's user-facing settings live in a few different places.
 
-First, the command-line options are defined via the `Args` struct in `crates/ruff/src/args.rs`.
+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_workspace/src/options.rs` (via the
-`Options` struct), `crates/ruff_workspace/src/configuration.rs` (via the `Configuration` struct),
-and `crates/ruff_workspace/src/settings.rs` (via the `Settings` struct), which then includes
-the `LinterSettings` struct as a field.
-
-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.
+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
-`arg.rs`, if appropriate). If you want to pattern-match against an existing example, grep for
+`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.,
-`Settings` in `crates/ruff_linter/src/flake8_unused_arguments/settings.rs` coupled with
-`Flake8UnusedArgumentsOptions` in `crates/ruff_workspace/src/options.rs`).
+`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`.
 
@@ -309,7 +295,7 @@ To preview any changes to the documentation locally:
 
     ```shell
     # For contributors.
-    mkdocs serve -f mkdocs.public.yml
+    mkdocs serve -f mkdocs.generated.yml
 
     # For members of the Astral org, which has access to MkDocs Insiders via sponsorship.
     mkdocs serve -f mkdocs.insiders.yml
@@ -329,115 +315,93 @@ even patch releases may contain [non-backwards-compatible changes](https://semve
 
 ### Creating a new release
 
-We use an experimental in-house tool for managing releases.
-
-1. Install `rooster`: `pip install git+https://github.com/zanieb/rooster@main`
-1. Run `rooster release`; this command will:
-    - Generate a changelog entry in `CHANGELOG.md`
-    - Update versions in `pyproject.toml` and `Cargo.toml`
-    - Update references to versions in the `README.md` and documentation
-1. The changelog should then be editorialized for consistency
-    - Often labels will be missing from pull requests they will need to be manually organized into the proper section
-    - Changes should be edited to be user-facing descriptions, avoiding internal details
-1. Highlight any breaking changes in `BREAKING_CHANGES.md`
-1. Run `cargo check`. This should update the lock file with new versions.
-1. Create a pull request with the changelog and version updates
+1. Update the version with `rg 0.0.269 --files-with-matches | xargs sed -i 's/0.0.269/0.0.270/g'`
+1. Update `BREAKING_CHANGES.md`
+1. Create a PR with the version and `BREAKING_CHANGES.md` updated
 1. Merge the PR
-1. Run the [release workflow](https://github.com/astral-sh/ruff/actions/workflows/release.yaml) with:
-    - The new version number (without starting `v`)
-    - The commit hash of the merged release pull request on `main`
+1. Run the release workflow with the version number (without starting `v`) as input. Make sure
+    main has your merged PR as last commit
 1. The release workflow will do the following:
     1. Build all the assets. If this fails (even though we tested in step 4), we haven't tagged or
         uploaded anything, you can restart after pushing a fix.
     1. Upload to PyPI.
     1. Create and push the Git tag (as extracted from `pyproject.toml`). We create the Git tag only
-        after building the wheels and uploading to PyPI, since we can't delete or modify the tag ([#4468](https://github.com/astral-sh/ruff/issues/4468)).
+        after building the wheels and uploading to PyPI, since we can't delete or modify the tag ([#4468](https://github.com/charliermarsh/ruff/issues/4468)).
     1. Attach artifacts to draft GitHub release
     1. Trigger downstream repositories. This can fail non-catastrophically, as we can run any
         downstream jobs manually if needed.
-1. Publish the GitHub release
-    1. Open the draft release in the GitHub release section
-    1. Copy the changelog for the release into the GitHub release
-        - See previous releases for formatting of section headers
-    1. Generate the contributor list with `rooster contributors` and add to the release notes
-1. If needed, [update the schemastore](https://github.com/astral-sh/ruff/blob/main/scripts/update_schemastore.py).
-    1. One can determine if an update is needed when
-        `git diff old-version-tag new-version-tag -- ruff.schema.json` returns a non-empty diff.
-    1. Once run successfully, you should follow the link in the output to create a PR.
+1. Create release notes in GitHub UI and promote from draft.
+1. If needed, [update the schemastore](https://github.com/charliermarsh/ruff/blob/main/scripts/update_schemastore.py)
 1. If needed, update the `ruff-lsp` and `ruff-vscode` repositories.
 
 ## Ecosystem CI
 
 GitHub Actions will run your changes against a number of real-world projects from GitHub and
-report on any linter or formatter differences. You can also run those checks locally via:
+report on any diagnostic differences. You can also run those checks locally via:
 
 ```shell
-pip install -e ./python/ruff-ecosystem
-ruff-ecosystem check ruff "./target/debug/ruff"
-ruff-ecosystem format ruff "./target/debug/ruff"
+python scripts/check_ecosystem.py path/to/your/ruff path/to/older/ruff
 ```
 
-See the [ruff-ecosystem package](https://github.com/astral-sh/ruff/tree/main/python/ruff-ecosystem) for more details.
+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/astral-sh/ruff/blob/main/scripts/Dockerfile.ecosystem).
+Note that this check will take a while to run.
 
 ## Benchmarking and Profiling
 
 We have several ways of benchmarking and profiling Ruff:
 
 - Our main performance benchmark comparing Ruff with other tools on the CPython codebase
-- Microbenchmarks which run the linter or the formatter on individual files. These run on pull requests.
+- Microbenchmarks which the linter or the formatter on individual files. There run on pull requests.
 - Profiling the linter on either the microbenchmarks or entire projects
 
-> \[!NOTE\]
-> When running benchmarks, ensure that your CPU is otherwise idle (e.g., close any background
-> applications, like web browsers). You may also want to switch your CPU to a "performance"
-> mode, if it exists, especially when benchmarking short-lived processes.
-
 ### CPython Benchmark
 
 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_linter/resources/test/cpython
+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 --warmup 10 \
-  "./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache -e" \
-  "./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ -e"
+  "./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache -e" \
+  "./target/release/ruff ./crates/ruff/resources/test/cpython/ -e"
 
-Benchmark 1: ./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache
+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
 
-Benchmark 2: ./target/release/ruff ./crates/ruff_linter/resources/test/cpython/
+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
 
 Summary
-  './target/release/ruff ./crates/ruff_linter/resources/test/cpython/' ran
-    6.12 ± 0.41 times faster than './target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache'
+  './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_linter/resources/test/cpython/ --no-cache" \
-  "pyflakes crates/ruff_linter/resources/test/cpython" \
+  "./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_linter/resources/test/cpython" \
-  "flake8 crates/ruff_linter/resources/test/cpython"
+  "pycodestyle crates/ruff/resources/test/cpython" \
+  "flake8 crates/ruff/resources/test/cpython"
 
-Benchmark 1: ./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache
+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_linter/resources/test/cpython
+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
 
@@ -447,31 +411,31 @@ Benchmark 3: autoflake --recursive --expand-star-imports --remove-all-unused-imp
   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_linter/resources/test/cpython
+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_linter/resources/test/cpython
+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_linter/resources/test/cpython/ --no-cache' ran
+  './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_linter/resources/test/cpython'
-   53.64 ± 0.77 times faster than 'pyflakes crates/ruff_linter/resources/test/cpython'
-  159.43 ± 2.48 times faster than 'pycodestyle crates/ruff_linter/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'
 ```
 
 To benchmark a subset of rules, e.g. `LineTooLong` and `DocLineTooLong`:
 
 ```shell
 cargo build --release && hyperfine --warmup 10 \
-  "./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache -e --select W505,E501"
+  "./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache -e --select W505,E501"
 ```
 
 You can run `poetry install` from `./scripts/benchmarks` to create a working environment for the
@@ -504,10 +468,10 @@ rm Lib/test/bad_coding.py \
   Lib/test/test_typing.py
 ```
 
-Then, from `crates/ruff_linter/resources/test/cpython`, run: `time pylint -j 0 -E $(git ls-files '*.py')`. This
+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_linter/resources/test/cpython`:
+To benchmark Pyupgrade, run the following from `crates/ruff/resources/test/cpython`:
 
 ```shell
 hyperfine --ignore-failure --warmup 5 --prepare "git reset --hard HEAD" \
@@ -537,10 +501,10 @@ if the benchmark improved/regressed compared to that baseline.
 
 ```shell
 # Run once on your "baseline" code
-cargo bench -p ruff_benchmark -- --save-baseline=main
+cargo benchmark --save-baseline=main
 
 # Then iterate with
-cargo bench -p ruff_benchmark -- --baseline=main
+cargo benchmark --baseline=main
 ```
 
 #### PR Summary
@@ -550,10 +514,10 @@ This is useful to illustrate the improvements of a PR.
 
 ```shell
 # On main
-cargo bench -p ruff_benchmark -- --save-baseline=main
+cargo benchmark --save-baseline=main
 
 # After applying your changes
-cargo bench -p ruff_benchmark -- --save-baseline=pr
+cargo benchmark --save-baseline=pr
 
 critcmp main pr
 ```
@@ -566,10 +530,10 @@ cargo install critcmp
 
 #### Tips
 
-- Use `cargo bench -p ruff_benchmark <filter>` to only run specific benchmarks. For example: `cargo benchmark lexer`
-    to only run the lexer benchmarks.
-- Use `cargo bench -p ruff_benchmark -- --quiet` for a more cleaned up output (without statistical relevance)
-- Use `cargo bench -p ruff_benchmark -- --quick` to get faster results (more prone to noise)
+- Use `cargo benchmark <filter>` to only run specific benchmarks. For example: `cargo benchmark linter/pydantic`
+    to only run the pydantic tests.
+- Use `cargo benchmark --quiet` for a more cleaned up output (without statistical relevance)
+- Use `cargo benchmark --quick` to get faster results (more prone to noise)
 
 ### Profiling Projects
 
@@ -580,10 +544,10 @@ examples.
 
 #### Linux
 
-Install `perf` and build `ruff_benchmark` with the `profiling` profile and then run it with perf
+Install `perf` and build `ruff_benchmark` with the `release-debug` profile and then run it with perf
 
 ```shell
-cargo bench -p ruff_benchmark --no-run --profile=profiling && perf record --call-graph dwarf -F 9999 cargo bench -p ruff_benchmark --profile=profiling -- --profile-time=1
+cargo bench -p ruff_benchmark --no-run --profile=release-debug && perf record --call-graph dwarf -F 9999 cargo bench -p ruff_benchmark --profile=release-debug -- --profile-time=1
 ```
 
 You can also use the `ruff_dev` launcher to run `ruff check` multiple times on a repository to
@@ -591,8 +555,8 @@ gather enough samples for a good flamegraph (change the 999, the sample rate, an
 of checks, to your liking)
 
 ```shell
-cargo build --bin ruff_dev --profile=profiling
-perf record -g -F 999 target/profiling/ruff_dev repeat --repeat 30 --exit-zero --no-cache path/to/cpython > /dev/null
+cargo build --bin ruff_dev --profile=release-debug
+perf record -g -F 999 target/release-debug/ruff_dev repeat --repeat 30 --exit-zero --no-cache path/to/cpython > /dev/null
 ```
 
 Then convert the recorded profile
@@ -622,7 +586,7 @@ cargo install cargo-instruments
 Then run the profiler with
 
 ```shell
-cargo instruments -t time --bench linter --profile profiling -p ruff_benchmark -- --profile-time=1
+cargo instruments -t time --bench linter --profile release-debug -p ruff_benchmark -- --profile-time=1
 ```
 
 - `-t`: Specifies what to profile. Useful options are `time` to profile the wall time and `alloc`
@@ -637,7 +601,7 @@ Otherwise, follow the instructions from the linux section.
 utils with it:
 
 - `cargo dev print-ast <file>`: Print the AST of a python file using the
-    [RustPython parser](https://github.com/astral-sh/ruff/tree/main/crates/ruff_python_parser) that is
+    [RustPython parser](https://github.com/astral-sh/RustPython-Parser/tree/main/parser) that is
     mainly used in Ruff. For `if True: pass # comment`, you can see the syntax tree, the byte offsets
     for start and stop of each node and also how the `:` token, the comment and whitespace are not
     represented anymore:
@@ -913,5 +877,5 @@ By default, `src` is set to the project root. In the above example, we'd want to
 `src = ["./src"]` to ensure that we locate `./my_project/src/foo` and thus categorize `import foo`
 as first-party in `baz.py`. In practice, for this limited example, setting `src = ["./src"]` is
 unnecessary, as all imports within `./my_project/src/foo` would be categorized as first-party via
-the same-package heuristic; but if your project contains multiple packages, you'll want to set `src`
+the same-package heuristic; but your project contains multiple packages, you'll want to set `src`
 explicitly.

Cargo.toml

@@ -12,152 +12,54 @@ authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 license = "MIT"
 
 [workspace.dependencies]
-aho-corasick = { version = "1.1.2" }
-annotate-snippets = { version = "0.9.2", features = ["color"] }
-anyhow = { version = "1.0.79" }
-argfile = { version = "0.1.6" }
-assert_cmd = { version = "2.0.13" }
-bincode = { version = "1.3.3" }
-bitflags = { version = "2.4.1" }
-bstr = { version = "1.9.0" }
-cachedir = { version = "0.3.1" }
-chrono = { version = "0.4.34", default-features = false, features = ["clock"] }
-clap = { version = "4.4.18", features = ["derive"] }
-clap_complete_command = { version = "0.5.1" }
-clearscreen = { version = "2.0.0" }
-codspeed-criterion-compat = { version = "2.3.3", default-features = false }
-colored = { version = "2.1.0" }
-configparser = { version = "3.0.3" }
-console_error_panic_hook = { version = "0.1.7" }
-console_log = { version = "1.0.0" }
-countme = { version ="3.0.1"}
-criterion = { version = "0.5.1", default-features = false }
-dirs = { version = "5.0.0" }
-drop_bomb = { version = "0.1.5" }
-env_logger = { version ="0.10.1"}
-fern = { version = "0.6.1" }
-filetime = { version = "0.2.23" }
-fs-err = { version ="2.11.0"}
+anyhow = { version = "1.0.69" }
+bitflags = { version = "2.3.1" }
+chrono = { version = "0.4.31", default-features = false, features = ["clock"] }
+clap = { version = "4.4.4", features = ["derive"] }
+colored = { version = "2.0.0" }
+filetime = { version = "0.2.20" }
 glob = { version = "0.3.1" }
-globset = { version = "0.4.14" }
-hexf-parse = { version ="0.2.1"}
-ignore = { version = "0.4.22" }
-imara-diff ={ version = "0.1.5"}
-imperative = { version = "1.0.4" }
-indicatif ={ version = "0.17.8"}
-indoc ={ version = "2.0.4"}
-insta = { version = "1.34.0", feature = ["filters", "glob"] }
-insta-cmd = { version = "0.4.0" }
-is-macro = { version = "0.3.5" }
-is-wsl = { version = "0.4.0" }
-itertools = { version = "0.12.1" }
-js-sys = { version = "0.3.67" }
-lalrpop-util = { version = "0.20.0", default-features = false }
-lexical-parse-float = { version = "0.8.0", features = ["format"] }
-libcst = { version = "1.1.0", default-features = false }
+globset = { version = "0.4.10" }
+ignore = { version = "0.4.20" }
+insta = { version = "1.31.0", feature = ["filters", "glob"] }
+is-macro = { version = "0.3.0" }
+itertools = { version = "0.11.0" }
 log = { version = "0.4.17" }
-memchr = { version = "2.7.1" }
-mimalloc = { version ="0.1.39"}
-natord = { version = "1.0.9" }
-notify = { version = "6.1.1" }
-once_cell = { version = "1.19.0" }
+malachite = { version = "0.4.0", default-features = false, features = ["naturals_and_integers"] }
+memchr = "2.6.3"
+num-traits = { version = "0.2.15" }
+once_cell = { version = "1.17.1" }
 path-absolutize = { version = "3.1.1" }
-pathdiff = { version = "0.2.1" }
-pep440_rs = { version = "0.4.0", features = ["serde"] }
-pretty_assertions = "1.3.0"
-proc-macro2 = { version = "1.0.78" }
-pyproject-toml = { version = "0.9.0" }
-quick-junit = { version = "0.3.5" }
+proc-macro2 = { version = "1.0.67" }
 quote = { version = "1.0.23" }
-rand = { version = "0.8.5" }
-rayon = { version = "1.8.1" }
-regex = { version = "1.10.2" }
-result-like = { version = "0.5.0" }
+regex = { version = "1.9.5" }
 rustc-hash = { version = "1.1.0" }
-schemars = { version = "0.8.16" }
-seahash = { version ="4.1.0"}
-semver = { version = "1.0.21" }
-serde = { version = "1.0.196", features = ["derive"] }
-serde-wasm-bindgen = { version = "0.6.3" }
-serde_json = { version = "1.0.113" }
-serde_test = { version = "1.0.152" }
-serde_with = { version = "3.6.0", default-features = false, features = ["macros"] }
+schemars = { version = "0.8.15" }
+serde = { version = "1.0.152", features = ["derive"] }
+serde_json = { version = "1.0.107" }
 shellexpand = { version = "3.0.0" }
-shlex = { version ="1.3.0"}
-similar = { version = "2.4.0", features = ["inline"] }
-smallvec = { version = "1.13.1" }
+similar = { version = "2.2.1", features = ["inline"] }
+smallvec = { version = "1.10.0" }
 static_assertions = "1.1.0"
 strum = { version = "0.25.0", features = ["strum_macros"] }
-strum_macros = { version = "0.25.3" }
-syn = { version = "2.0.40" }
-tempfile = { version ="3.9.0"}
-test-case = { version = "3.3.1" }
-thiserror = { version = "1.0.57" }
-tikv-jemallocator = { version ="0.5.0"}
-toml = { version = "0.8.9" }
-tracing = { version = "0.1.40" }
-tracing-indicatif = { version = "0.3.6" }
-tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
-typed-arena = { version = "2.0.2" }
-unic-ucd-category = { version ="0.9"}
-unicode-ident = { version = "1.0.12" }
-unicode-width = { version = "0.1.11" }
-unicode_names2 = { version = "1.2.1" }
-ureq = { version = "2.9.1" }
-url = { version = "2.5.0" }
-uuid = { version = "1.6.1", features = ["v4", "fast-rng", "macro-diagnostics", "js"] }
-walkdir = { version = "2.3.2" }
-wasm-bindgen = { version = "0.2.84" }
-wasm-bindgen-test = { version = "0.3.40" }
-wild = { version = "2" }
+strum_macros = { version = "0.25.2" }
+syn = { version = "2.0.37" }
+test-case = { version = "3.2.1" }
+thiserror = { version = "1.0.48" }
+toml = { version = "0.7.8" }
+tracing = "0.1.37"
+tracing-indicatif = "0.3.4"
+tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
+unicode-ident = "1.0.12"
+unicode-width = "0.1.10"
+uuid = { version = "1.4.1", features = ["v4", "fast-rng", "macro-diagnostics", "js"] }
+wsl = { version = "0.1.0" }
 
-[workspace.lints.rust]
-unsafe_code = "warn"
-unreachable_pub = "warn"
-
-[workspace.lints.clippy]
-pedantic = { level = "warn", priority = -2 }
-# Allowed pedantic lints
-char_lit_as_u8 = "allow"
-collapsible_else_if = "allow"
-collapsible_if = "allow"
-implicit_hasher = "allow"
-match_same_arms = "allow"
-missing_errors_doc = "allow"
-missing_panics_doc = "allow"
-module_name_repetitions = "allow"
-must_use_candidate = "allow"
-similar_names = "allow"
-too_many_lines = "allow"
-# To allow `#[allow(clippy::all)]` in `crates/ruff_python_parser/src/python.rs`.
-needless_raw_string_hashes = "allow"
-# Disallowed restriction lints
-print_stdout = "warn"
-print_stderr = "warn"
-dbg_macro = "warn"
-empty_drop = "warn"
-empty_structs_with_brackets = "warn"
-exit = "warn"
-get_unwrap = "warn"
-rc_buffer = "warn"
-rc_mutex = "warn"
-rest_pat_in_fully_bound_structs = "warn"
+# v1.0.1
+libcst = { version = "0.1.0", default-features = false }
 
 [profile.release]
-# Note that we set these explicitly, and these values
-# were chosen based on a trade-off between compile times
-# and runtime performance[1].
-#
-# [1]: https://github.com/astral-sh/ruff/pull/9031
-lto = "thin"
-codegen-units = 16
-
-# Some crates don't change as much but benefit more from
-# more expensive optimization passes, so we selectively
-# decrease codegen-units in some cases.
-[profile.release.package.ruff_python_parser]
-codegen-units = 1
-[profile.release.package.ruff_python_ast]
+lto = "fat"
 codegen-units = 1
 
 [profile.dev.package.insta]
@@ -171,8 +73,8 @@ opt-level = 3
 [profile.dev.package.ruff_python_parser]
 opt-level = 1
 
-# Use the `--profile profiling` flag to show symbols in release mode.
-# e.g. `cargo build --profile profiling`
-[profile.profiling]
+# 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

Dockerfile

@@ -1,38 +0,0 @@
-FROM --platform=$BUILDPLATFORM ubuntu as build
-ENV HOME="/root"
-WORKDIR $HOME
-
-RUN apt update && apt install -y build-essential curl python3-venv
-
-# Setup zig as cross compiling linker
-RUN python3 -m venv $HOME/.venv
-RUN .venv/bin/pip install cargo-zigbuild
-ENV PATH="$HOME/.venv/bin:$PATH"
-
-# Install rust
-ARG TARGETPLATFORM
-RUN case "$TARGETPLATFORM" in \
-    "linux/arm64") echo "aarch64-unknown-linux-musl" > rust_target.txt ;; \
-    "linux/amd64") echo "x86_64-unknown-linux-musl" > rust_target.txt ;; \
-    *) exit 1 ;; \
-    esac
-# Update rustup whenever we bump the rust version
-COPY rust-toolchain.toml rust-toolchain.toml
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --target $(cat rust_target.txt) --profile minimal --default-toolchain none
-ENV PATH="$HOME/.cargo/bin:$PATH"
-# Installs the correct toolchain version from rust-toolchain.toml and then the musl target
-RUN rustup target add $(cat rust_target.txt)
-
-# Build
-COPY crates crates
-COPY Cargo.toml Cargo.toml
-COPY Cargo.lock Cargo.lock
-RUN cargo zigbuild --bin ruff --target $(cat rust_target.txt) --release
-RUN cp target/$(cat rust_target.txt)/release/ruff /ruff
-# TODO: Optimize binary size, with a version that also works when cross compiling
-# RUN strip --strip-all /ruff
-
-FROM scratch
-COPY --from=build /ruff /ruff
-WORKDIR /io
-ENTRYPOINT ["/ruff"]

LICENSE

@@ -1194,27 +1194,7 @@ are:
 
 - flake8-self, licensed as follows:
   """
-    MIT License
-
-    Copyright (c) 2023 Korijn van Golen
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE.
+    Freely Distributable
   """
 
 - flake8-django, licensed under the GPL license.
@@ -1269,31 +1249,6 @@ are:
     SOFTWARE.
   """
 
-- flake8-trio, licensed as follows:
-  """
-    MIT License
-
-    Copyright (c) 2022 Zac Hatfield-Dodds
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE.
-  """
-
 - Pyright, licensed as follows:
   """
     MIT License

README.md

@@ -10,7 +10,7 @@
 
 [**Discord**](https://discord.gg/c9MhzV8aU5) | [**Docs**](https://docs.astral.sh/ruff/) | [**Playground**](https://play.ruff.rs/)
 
-An extremely fast Python linter and code formatter, written in Rust.
+An extremely fast Python linter, written in Rust.
 
 <p align="center">
   <picture align="center">
@@ -24,16 +24,17 @@ An extremely fast Python linter and code formatter, written in Rust.
   <i>Linting the CPython codebase from scratch.</i>
 </p>
 
-- ⚡️ 10-100x faster than existing linters (like Flake8) and formatters (like Black)
+- ⚡️ 10-100x faster than existing linters
 - 🐍 Installable via `pip`
 - 🛠️ `pyproject.toml` support
-- 🤝 Python 3.12 compatibility
-- ⚖️ Drop-in parity with [Flake8](https://docs.astral.sh/ruff/faq/#how-does-ruff-compare-to-flake8), isort, and Black
+- 🤝 Python 3.11 compatibility
 - 📦 Built-in caching, to avoid re-analyzing unchanged files
-- 🔧 Fix support, for automatic error correction (e.g., automatically remove unused imports)
-- 📏 Over [700 built-in rules](https://docs.astral.sh/ruff/rules/), with native re-implementations
-    of popular Flake8 plugins, like flake8-bugbear
-- ⌨️ First-party [editor integrations](https://docs.astral.sh/ruff/integrations/) for
+- 🔧 Autofix support, for automatic error correction (e.g., automatically remove unused imports)
+- 📏 Over [600 built-in rules](https://docs.astral.sh/ruff/rules/)
+- ⚖️ [Near-parity](https://docs.astral.sh/ruff/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](https://docs.astral.sh/ruff/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://docs.astral.sh/ruff/configuration/#pyprojecttoml-discovery)
 
@@ -41,10 +42,10 @@ Ruff aims to be orders of magnitude faster than alternative tools while integrat
 functionality behind a single, common interface.
 
 Ruff can be used to replace [Flake8](https://pypi.org/project/flake8/) (plus dozens of plugins),
-[Black](https://github.com/psf/black), [isort](https://pypi.org/project/isort/),
-[pydocstyle](https://pypi.org/project/pydocstyle/), [pyupgrade](https://pypi.org/project/pyupgrade/),
-[autoflake](https://pypi.org/project/autoflake/), and more, all while executing tens or hundreds of
-times faster than any individual tool.
+[isort](https://pypi.org/project/isort/), [pydocstyle](https://pypi.org/project/pydocstyle/),
+[yesqa](https://github.com/asottile/yesqa), [eradicate](https://pypi.org/project/eradicate/),
+[pyupgrade](https://pypi.org/project/pyupgrade/), and [autoflake](https://pypi.org/project/autoflake/),
+all while executing tens or hundreds of times faster than any individual tool.
 
 Ruff is extremely actively developed and used in major open-source projects like:
 
@@ -54,7 +55,7 @@ Ruff is extremely actively developed and used in major open-source projects like
 - [Pandas](https://github.com/pandas-dev/pandas)
 - [SciPy](https://github.com/scipy/scipy)
 
-...and [many more](#whos-using-ruff).
+...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).
@@ -125,38 +126,23 @@ and with [a variety of other package managers](https://docs.astral.sh/ruff/insta
 
 ### Usage
 
-To run Ruff as a linter, try any of the following:
+To run Ruff, try any of the following:
 
 ```shell
-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`.
-ruff check @arguments.txt           # Lint using an input file, treating its contents as newline-delimited command-line arguments.
+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`
 ```
 
-Or, to run Ruff as a formatter:
-
-```shell
-ruff format .                        # Format all files in the current directory (and any subdirectories).
-ruff format path/to/code/            # Format all files in `/path/to/code` (and any subdirectories).
-ruff format path/to/code/*.py        # Format all `.py` files in `/path/to/code`.
-ruff format path/to/code/to/file.py  # Format `file.py`.
-ruff format @arguments.txt           # Format using an input file, treating its contents as newline-delimited command-line arguments.
-```
-
-Ruff can also be used as a [pre-commit](https://pre-commit.com/) hook via [`ruff-pre-commit`](https://github.com/astral-sh/ruff-pre-commit):
+Ruff can also be used as a [pre-commit](https://pre-commit.com) hook:
 
 ```yaml
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.2.1
+  rev: v0.0.290
   hooks:
-    # Run the linter.
     - id: ruff
-      args: [ --fix ]
-    # Run the formatter.
-    - id: ruff-format
 ```
 
 Ruff can also be used as a [VS Code extension](https://github.com/astral-sh/ruff-vscode) or
@@ -182,10 +168,18 @@ Ruff can be configured through a `pyproject.toml`, `ruff.toml`, or `.ruff.toml`
 [_Configuration_](https://docs.astral.sh/ruff/configuration/), or [_Settings_](https://docs.astral.sh/ruff/settings/)
 for a complete list of all configuration options).
 
-If left unspecified, Ruff's default configuration is equivalent to:
+If left unspecified, the default configuration is equivalent to:
 
 ```toml
 [tool.ruff]
+# 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",
@@ -194,81 +188,58 @@ exclude = [
     ".git",
     ".git-rewrite",
     ".hg",
-    ".ipynb_checkpoints",
     ".mypy_cache",
     ".nox",
     ".pants.d",
-    ".pyenv",
-    ".pytest_cache",
     ".pytype",
     ".ruff_cache",
     ".svn",
     ".tox",
     ".venv",
-    ".vscode",
     "__pypackages__",
     "_build",
     "buck-out",
     "build",
     "dist",
     "node_modules",
-    "site-packages",
     "venv",
 ]
 
 # Same as Black.
 line-length = 88
-indent-width = 4
-
-# Assume Python 3.8
-target-version = "py38"
-
-[tool.ruff.lint]
-# Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`)  codes by default.
-select = ["E4", "E7", "E9", "F"]
-ignore = []
-
-# Allow fix for all enabled rules (when `--fix`) is provided.
-fixable = ["ALL"]
-unfixable = []
 
 # Allow unused variables when underscore-prefixed.
 dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
 
-[tool.ruff.format]
-# Like Black, use double quotes for strings.
-quote-style = "double"
+# Assume Python 3.8
+target-version = "py38"
 
-# Like Black, indent with spaces, rather than tabs.
-indent-style = "space"
-
-# Like Black, respect magic trailing commas.
-skip-magic-trailing-comma = false
-
-# Like Black, automatically detect the appropriate line ending.
-line-ending = "auto"
+[tool.ruff.mccabe]
+# Unlike Flake8, default to a complexity level of 10.
+max-complexity = 10
 ```
 
 Some configuration options can be provided via the command-line, such as those related to
-rule enablement and disablement, file discovery, and logging level:
+rule enablement and disablement, file discovery, logging level, and more:
 
 ```shell
 ruff check path/to/code/ --select F401 --select F403 --quiet
 ```
 
-See `ruff help` for more on Ruff's top-level commands, or `ruff help check` and `ruff help format`
-for more on the linting and formatting commands, respectively.
+See `ruff help` for more on Ruff's top-level commands, or `ruff help check` for more on the
+linting command.
 
 ## Rules
 
 <!-- Begin section: Rules -->
 
-**Ruff supports over 700 lint rules**, many of which are inspired by popular tools like Flake8,
+**Ruff supports over 600 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.
 
-By default, Ruff enables Flake8's `F` rules, along with a subset of the `E` rules, omitting any
-stylistic rules that overlap with the use of a formatter, like `ruff format` or
+By default, Ruff enables Flake8's `E` and `F` rules. Ruff supports all rules from the `F` category,
+and a [subset](https://docs.astral.sh/ruff/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).
 
 If you're just getting started with Ruff, **the default rule set is a great place to start**: it
@@ -319,7 +290,6 @@ quality tools, including:
 - [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-trio](https://pypi.org/project/flake8-trio/)
 - [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/astral-sh/ruff/issues/2102))
@@ -361,7 +331,7 @@ 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 formatter is built on a fork of Rome's [`rome_formatter`](https://github.com/rome/tools/tree/main/crates/rome_formatter),
+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 API and implementation details from [Rome](https://github.com/rome/tools),
 [Prettier](https://github.com/prettier/prettier), and [Black](https://github.com/psf/black).
 
@@ -382,11 +352,10 @@ Ruff is used by a number of major open-source projects and companies, including:
 - Anthropic ([Python SDK](https://github.com/anthropics/anthropic-sdk-python))
 - [Apache Airflow](https://github.com/apache/airflow)
 - AstraZeneca ([Magnus](https://github.com/AstraZeneca/magnus-core))
-- [Babel](https://github.com/python-babel/babel)
 - 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)
-- CERN ([Indico](https://getindico.io/))
 - [DVC](https://github.com/iterative/dvc)
 - [Dagger](https://github.com/dagger/dagger)
 - [Dagster](https://github.com/dagster-io/dagster)
@@ -395,17 +364,15 @@ Ruff is used by a number of major open-source projects and companies, including:
 - [Gradio](https://github.com/gradio-app/gradio)
 - [Great Expectations](https://github.com/great-expectations/great_expectations)
 - [HTTPX](https://github.com/encode/httpx)
-- [Hatch](https://github.com/pypa/hatch)
-- [Home Assistant](https://github.com/home-assistant/core)
 - 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)
 - ING Bank ([popmon](https://github.com/ing-bank/popmon), [probatus](https://github.com/ing-bank/probatus))
 - [Ibis](https://github.com/ibis-project/ibis)
-- [ivy](https://github.com/unifyai/ivy)
 - [Jupyter](https://github.com/jupyter-server/jupyter_server)
 - [LangChain](https://github.com/hwchase17/langchain)
-- [Litestar](https://litestar.dev/)
 - [LlamaIndex](https://github.com/jerryjliu/llama_index)
 - Matrix ([Synapse](https://github.com/matrix-org/synapse))
 - [MegaLinter](https://github.com/oxsecurity/megalinter)
@@ -418,37 +385,29 @@ Ruff is used by a number of major open-source projects and companies, including:
 - [Mypy](https://github.com/python/mypy)
 - Netflix ([Dispatch](https://github.com/Netflix/dispatch))
 - [Neon](https://github.com/neondatabase/neon)
-- [NoneBot](https://github.com/nonebot/nonebot2)
-- [NumPyro](https://github.com/pyro-ppl/numpyro)
 - [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)
-- [Pillow](https://github.com/python-pillow/Pillow)
 - [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)
-- [PyMC](https://github.com/pymc-devs/pymc/)
-- [PyMC-Marketing](https://github.com/pymc-labs/pymc-marketing)
-- [pytest](https://github.com/pytest-dev/pytest)
 - [PyTorch](https://github.com/pytorch/pytorch)
 - [Pydantic](https://github.com/pydantic/pydantic)
 - [Pylint](https://github.com/PyCQA/pylint)
-- [PyVista](https://github.com/pyvista/pyvista)
 - [Reflex](https://github.com/reflex-dev/reflex)
-- [River](https://github.com/online-ml/river)
 - [Rippling](https://rippling.com)
 - [Robyn](https://github.com/sansyrox/robyn)
-- [Saleor](https://github.com/saleor/saleor)
 - Scale AI ([Launch SDK](https://github.com/scaleapi/launch-python-client))
-- [SciPy](https://github.com/scipy/scipy)
 - 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)
-- [Starlette](https://github.com/encode/starlette)
+- [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))
@@ -464,7 +423,7 @@ Ruff is used by a number of major open-source projects and companies, including:
 
 ### Show Your Support
 
-If you're using Ruff, consider adding the Ruff badge to your project's `README.md`:
+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/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
@@ -490,6 +449,6 @@ MIT
 
 <div align="center">
   <a target="_blank" href="https://astral.sh" style="background:none">
-    <img src="https://raw.githubusercontent.com/astral-sh/ruff/main/assets/svg/Astral.svg" alt="Made by Astral">
+    <img src="https://raw.githubusercontent.com/astral-sh/ruff/main/assets/svg/Astral.svg">
   </a>
 </div>

_typos.toml

@@ -1,6 +1,5 @@
 [files]
-# https://github.com/crate-ci/typos/issues/868
-extend-exclude = ["**/resources/**/*", "**/snapshots/**/*"]
+extend-exclude = ["resources", "snapshots"]
 
 [default.extend-words]
 hel = "hel"

assets/badge/format.json

@@ -1,8 +0,0 @@
-{
-  "label": "code style",
-  "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"
-}

crates/flake8_to_ruff/Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "flake8-to-ruff"
+version = "0.0.290"
+description = """
+Convert Flake8 configuration files to Ruff configuration files.
+"""
+authors = { workspace = true }
+edition = { workspace = true }
+rust-version = { workspace = true }
+homepage = { workspace = true }
+documentation = { workspace = true }
+repository = { workspace = true }
+license = { workspace = true }
+
+[dependencies]
+ruff = { path = "../ruff", default-features = false }
+ruff_workspace = { path = "../ruff_workspace" }
+
+anyhow = { workspace = true }
+clap = { workspace = true }
+colored = { workspace = true }
+configparser = { version = "3.0.2" }
+itertools = { workspace = true }
+log = { workspace = true }
+once_cell = { workspace = true }
+pep440_rs = { version = "0.3.1", features = ["serde"] }
+regex = { workspace = true }
+rustc-hash = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+strum = { workspace = true }
+strum_macros = { workspace = true }
+toml = { workspace = true }
+
+[dev-dependencies]
+pretty_assertions = "1.3.0"

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/astral-sh/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://docs.astral.sh/ruff/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/astral-sh/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/astral-sh/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/black.rs

@@ -0,0 +1,13 @@
+//! Extract Black configuration settings from a pyproject.toml.
+
+use ruff::line_width::LineLength;
+use ruff::settings::types::PythonVersion;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
+pub(crate) struct Black {
+    #[serde(alias = "line-length", alias = "line_length")]
+    pub(crate) line_length: Option<LineLength>,
+    #[serde(alias = "target-version", alias = "target_version")]
+    pub(crate) target_version: Option<Vec<PythonVersion>>,
+}

crates/flake8_to_ruff/src/converter.rs

@@ -0,0 +1,639 @@
+use std::collections::{HashMap, HashSet};
+use std::str::FromStr;
+
+use itertools::Itertools;
+
+use ruff::line_width::LineLength;
+use ruff::registry::Linter;
+use ruff::rule_selector::RuleSelector;
+use ruff::rules::flake8_pytest_style::types::{
+    ParametrizeNameType, ParametrizeValuesRowType, ParametrizeValuesType,
+};
+use ruff::rules::flake8_quotes::settings::Quote;
+use ruff::rules::flake8_tidy_imports::settings::Strictness;
+use ruff::rules::pydocstyle::settings::Convention;
+use ruff::settings::types::PythonVersion;
+use ruff::warn_user;
+use ruff_workspace::options::{
+    Flake8AnnotationsOptions, Flake8BugbearOptions, Flake8BuiltinsOptions, Flake8ErrMsgOptions,
+    Flake8PytestStyleOptions, Flake8QuotesOptions, Flake8TidyImportsOptions, McCabeOptions,
+    Options, Pep8NamingOptions, PydocstyleOptions,
+};
+use ruff_workspace::pyproject::Pyproject;
+
+use super::external_config::ExternalConfig;
+use super::plugin::Plugin;
+use super::{parser, plugin};
+
+const DEFAULT_SELECTORS: &[RuleSelector] = &[
+    RuleSelector::Linter(Linter::Pyflakes),
+    RuleSelector::Linter(Linter::Pycodestyle),
+];
+
+pub(crate) fn convert(
+    config: &HashMap<String, HashMap<String, Option<String>>>,
+    external_config: &ExternalConfig,
+    plugins: Option<Vec<Plugin>>,
+) -> Pyproject {
+    // Extract the Flake8 section.
+    let flake8 = config
+        .get("flake8")
+        .expect("Unable to find flake8 section in INI file");
+
+    // Extract all referenced rule code prefixes, to power plugin inference.
+    let mut referenced_codes: HashSet<RuleSelector> = HashSet::default();
+    for (key, value) in flake8 {
+        if let Some(value) = value {
+            match key.as_str() {
+                "select" | "ignore" | "extend-select" | "extend_select" | "extend-ignore"
+                | "extend_ignore" => {
+                    referenced_codes.extend(parser::parse_prefix_codes(value.as_ref()));
+                }
+                "per-file-ignores" | "per_file_ignores" => {
+                    if let Ok(per_file_ignores) =
+                        parser::parse_files_to_codes_mapping(value.as_ref())
+                    {
+                        for (_, codes) in parser::collect_per_file_ignores(per_file_ignores) {
+                            referenced_codes.extend(codes);
+                        }
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+
+    // Infer plugins, if not provided.
+    let plugins = plugins.unwrap_or_else(|| {
+        let from_options = plugin::infer_plugins_from_options(flake8);
+        if !from_options.is_empty() {
+            #[allow(clippy::print_stderr)]
+            {
+                eprintln!("Inferred plugins from settings: {from_options:#?}");
+            }
+        }
+        let from_codes = plugin::infer_plugins_from_codes(&referenced_codes);
+        if !from_codes.is_empty() {
+            #[allow(clippy::print_stderr)]
+            {
+                eprintln!("Inferred plugins from referenced codes: {from_codes:#?}");
+            }
+        }
+        from_options.into_iter().chain(from_codes).collect()
+    });
+
+    // Check if the user has specified a `select`. If not, we'll add our own
+    // default `select`, and populate it based on user plugins.
+    let mut select = flake8
+        .get("select")
+        .and_then(|value| {
+            value
+                .as_ref()
+                .map(|value| HashSet::from_iter(parser::parse_prefix_codes(value)))
+        })
+        .unwrap_or_else(|| resolve_select(&plugins));
+    let mut ignore: HashSet<RuleSelector> = flake8
+        .get("ignore")
+        .and_then(|value| {
+            value
+                .as_ref()
+                .map(|value| HashSet::from_iter(parser::parse_prefix_codes(value)))
+        })
+        .unwrap_or_default();
+
+    // Parse each supported option.
+    let mut options = Options::default();
+    let mut flake8_annotations = Flake8AnnotationsOptions::default();
+    let mut flake8_bugbear = Flake8BugbearOptions::default();
+    let mut flake8_builtins = Flake8BuiltinsOptions::default();
+    let mut flake8_errmsg = Flake8ErrMsgOptions::default();
+    let mut flake8_pytest_style = Flake8PytestStyleOptions::default();
+    let mut flake8_quotes = Flake8QuotesOptions::default();
+    let mut flake8_tidy_imports = Flake8TidyImportsOptions::default();
+    let mut mccabe = McCabeOptions::default();
+    let mut pep8_naming = Pep8NamingOptions::default();
+    let mut pydocstyle = PydocstyleOptions::default();
+    for (key, value) in flake8 {
+        if let Some(value) = value {
+            match key.as_str() {
+                // flake8
+                "builtins" => {
+                    options.builtins = Some(parser::parse_strings(value.as_ref()));
+                }
+                "max-line-length" | "max_line_length" => match LineLength::from_str(value) {
+                    Ok(line_length) => options.line_length = Some(line_length),
+                    Err(e) => {
+                        warn_user!("Unable to parse '{key}' property: {e}");
+                    }
+                },
+                "select" => {
+                    // No-op (handled above).
+                    select.extend(parser::parse_prefix_codes(value.as_ref()));
+                }
+                "ignore" => {
+                    // No-op (handled above).
+                }
+                "extend-select" | "extend_select" => {
+                    // Unlike Flake8, use a single explicit `select`.
+                    select.extend(parser::parse_prefix_codes(value.as_ref()));
+                }
+                "extend-ignore" | "extend_ignore" => {
+                    // Unlike Flake8, use a single explicit `ignore`.
+                    ignore.extend(parser::parse_prefix_codes(value.as_ref()));
+                }
+                "exclude" => {
+                    options.exclude = Some(parser::parse_strings(value.as_ref()));
+                }
+                "extend-exclude" | "extend_exclude" => {
+                    options.extend_exclude = Some(parser::parse_strings(value.as_ref()));
+                }
+                "per-file-ignores" | "per_file_ignores" => {
+                    match parser::parse_files_to_codes_mapping(value.as_ref()) {
+                        Ok(per_file_ignores) => {
+                            options.per_file_ignores =
+                                Some(parser::collect_per_file_ignores(per_file_ignores));
+                        }
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                // flake8-bugbear
+                "extend-immutable-calls" | "extend_immutable_calls" => {
+                    flake8_bugbear.extend_immutable_calls =
+                        Some(parser::parse_strings(value.as_ref()));
+                }
+                // flake8-builtins
+                "builtins-ignorelist" | "builtins_ignorelist" => {
+                    flake8_builtins.builtins_ignorelist =
+                        Some(parser::parse_strings(value.as_ref()));
+                }
+                // flake8-annotations
+                "suppress-none-returning" | "suppress_none_returning" => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_annotations.suppress_none_returning = Some(bool),
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                "suppress-dummy-args" | "suppress_dummy_args" => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_annotations.suppress_dummy_args = Some(bool),
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                "mypy-init-return" | "mypy_init_return" => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_annotations.mypy_init_return = Some(bool),
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                "allow-star-arg-any" | "allow_star_arg_any" => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_annotations.allow_star_arg_any = Some(bool),
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                // flake8-quotes
+                "quotes" | "inline-quotes" | "inline_quotes" => match value.trim() {
+                    "'" | "single" => flake8_quotes.inline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Double),
+                    _ => {
+                        warn_user!("Unexpected '{key}' value: {value}");
+                    }
+                },
+                "multiline-quotes" | "multiline_quotes" => match value.trim() {
+                    "'" | "single" => flake8_quotes.multiline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Double),
+                    _ => {
+                        warn_user!("Unexpected '{key}' value: {value}");
+                    }
+                },
+                "docstring-quotes" | "docstring_quotes" => match value.trim() {
+                    "'" | "single" => flake8_quotes.docstring_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Double),
+                    _ => {
+                        warn_user!("Unexpected '{key}' value: {value}");
+                    }
+                },
+                "avoid-escape" | "avoid_escape" => match parser::parse_bool(value.as_ref()) {
+                    Ok(bool) => flake8_quotes.avoid_escape = Some(bool),
+                    Err(e) => {
+                        warn_user!("Unable to parse '{key}' property: {e}");
+                    }
+                },
+                // pep8-naming
+                "ignore-names" | "ignore_names" => {
+                    pep8_naming.ignore_names = Some(parser::parse_strings(value.as_ref()));
+                }
+                "classmethod-decorators" | "classmethod_decorators" => {
+                    pep8_naming.classmethod_decorators =
+                        Some(parser::parse_strings(value.as_ref()));
+                }
+                "staticmethod-decorators" | "staticmethod_decorators" => {
+                    pep8_naming.staticmethod_decorators =
+                        Some(parser::parse_strings(value.as_ref()));
+                }
+                // flake8-tidy-imports
+                "ban-relative-imports" | "ban_relative_imports" => match value.trim() {
+                    "true" => flake8_tidy_imports.ban_relative_imports = Some(Strictness::All),
+                    "parents" => {
+                        flake8_tidy_imports.ban_relative_imports = Some(Strictness::Parents);
+                    }
+                    _ => {
+                        warn_user!("Unexpected '{key}' value: {value}");
+                    }
+                },
+                // flake8-docstrings
+                "docstring-convention" => match value.trim() {
+                    "google" => pydocstyle.convention = Some(Convention::Google),
+                    "numpy" => pydocstyle.convention = Some(Convention::Numpy),
+                    "pep257" => pydocstyle.convention = Some(Convention::Pep257),
+                    "all" => pydocstyle.convention = None,
+                    _ => {
+                        warn_user!("Unexpected '{key}' value: {value}");
+                    }
+                },
+                // mccabe
+                "max-complexity" | "max_complexity" => match value.parse::<usize>() {
+                    Ok(max_complexity) => mccabe.max_complexity = Some(max_complexity),
+                    Err(e) => {
+                        warn_user!("Unable to parse '{key}' property: {e}");
+                    }
+                },
+                // flake8-errmsg
+                "errmsg-max-string-length" | "errmsg_max_string_length" => {
+                    match value.parse::<usize>() {
+                        Ok(max_string_length) => {
+                            flake8_errmsg.max_string_length = Some(max_string_length);
+                        }
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                // flake8-pytest-style
+                "pytest-fixture-no-parentheses" | "pytest_fixture_no_parentheses " => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_pytest_style.fixture_parentheses = Some(!bool),
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                "pytest-parametrize-names-type" | "pytest_parametrize_names_type" => {
+                    match value.trim() {
+                        "csv" => {
+                            flake8_pytest_style.parametrize_names_type =
+                                Some(ParametrizeNameType::Csv);
+                        }
+                        "tuple" => {
+                            flake8_pytest_style.parametrize_names_type =
+                                Some(ParametrizeNameType::Tuple);
+                        }
+                        "list" => {
+                            flake8_pytest_style.parametrize_names_type =
+                                Some(ParametrizeNameType::List);
+                        }
+                        _ => {
+                            warn_user!("Unexpected '{key}' value: {value}");
+                        }
+                    }
+                }
+                "pytest-parametrize-values-type" | "pytest_parametrize_values_type" => {
+                    match value.trim() {
+                        "tuple" => {
+                            flake8_pytest_style.parametrize_values_type =
+                                Some(ParametrizeValuesType::Tuple);
+                        }
+                        "list" => {
+                            flake8_pytest_style.parametrize_values_type =
+                                Some(ParametrizeValuesType::List);
+                        }
+                        _ => {
+                            warn_user!("Unexpected '{key}' value: {value}");
+                        }
+                    }
+                }
+                "pytest-parametrize-values-row-type" | "pytest_parametrize_values_row_type" => {
+                    match value.trim() {
+                        "tuple" => {
+                            flake8_pytest_style.parametrize_values_row_type =
+                                Some(ParametrizeValuesRowType::Tuple);
+                        }
+                        "list" => {
+                            flake8_pytest_style.parametrize_values_row_type =
+                                Some(ParametrizeValuesRowType::List);
+                        }
+                        _ => {
+                            warn_user!("Unexpected '{key}' value: {value}");
+                        }
+                    }
+                }
+                "pytest-raises-require-match-for" | "pytest_raises_require_match_for" => {
+                    flake8_pytest_style.raises_require_match_for =
+                        Some(parser::parse_strings(value.as_ref()));
+                }
+                "pytest-mark-no-parentheses" | "pytest_mark_no_parentheses" => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_pytest_style.mark_parentheses = Some(!bool),
+                        Err(e) => {
+                            warn_user!("Unable to parse '{key}' property: {e}");
+                        }
+                    }
+                }
+                // Unknown
+                _ => {
+                    warn_user!("Skipping unsupported property: {}", key);
+                }
+            }
+        }
+    }
+
+    // Deduplicate and sort.
+    options.select = Some(
+        select
+            .into_iter()
+            .sorted_by_key(RuleSelector::prefix_and_code)
+            .collect(),
+    );
+    options.ignore = Some(
+        ignore
+            .into_iter()
+            .sorted_by_key(RuleSelector::prefix_and_code)
+            .collect(),
+    );
+    if flake8_annotations != Flake8AnnotationsOptions::default() {
+        options.flake8_annotations = Some(flake8_annotations);
+    }
+    if flake8_bugbear != Flake8BugbearOptions::default() {
+        options.flake8_bugbear = Some(flake8_bugbear);
+    }
+    if flake8_builtins != Flake8BuiltinsOptions::default() {
+        options.flake8_builtins = Some(flake8_builtins);
+    }
+    if flake8_errmsg != Flake8ErrMsgOptions::default() {
+        options.flake8_errmsg = Some(flake8_errmsg);
+    }
+    if flake8_pytest_style != Flake8PytestStyleOptions::default() {
+        options.flake8_pytest_style = Some(flake8_pytest_style);
+    }
+    if flake8_quotes != Flake8QuotesOptions::default() {
+        options.flake8_quotes = Some(flake8_quotes);
+    }
+    if flake8_tidy_imports != Flake8TidyImportsOptions::default() {
+        options.flake8_tidy_imports = Some(flake8_tidy_imports);
+    }
+    if mccabe != McCabeOptions::default() {
+        options.mccabe = Some(mccabe);
+    }
+    if pep8_naming != Pep8NamingOptions::default() {
+        options.pep8_naming = Some(pep8_naming);
+    }
+    if pydocstyle != PydocstyleOptions::default() {
+        options.pydocstyle = Some(pydocstyle);
+    }
+
+    // Extract any settings from the existing `pyproject.toml`.
+    if let Some(black) = &external_config.black {
+        if let Some(line_length) = &black.line_length {
+            options.line_length = Some(*line_length);
+        }
+
+        if let Some(target_version) = &black.target_version {
+            if let Some(target_version) = target_version.iter().min() {
+                options.target_version = Some(*target_version);
+            }
+        }
+    }
+
+    if let Some(isort) = &external_config.isort {
+        if let Some(src_paths) = &isort.src_paths {
+            match options.src.as_mut() {
+                Some(src) => {
+                    src.extend_from_slice(src_paths);
+                }
+                None => {
+                    options.src = Some(src_paths.clone());
+                }
+            }
+        }
+    }
+
+    if let Some(project) = &external_config.project {
+        if let Some(requires_python) = &project.requires_python {
+            if options.target_version.is_none() {
+                options.target_version =
+                    PythonVersion::get_minimum_supported_version(requires_python);
+            }
+        }
+    }
+
+    // Create the pyproject.toml.
+    Pyproject::new(options)
+}
+
+/// Resolve the set of enabled `RuleSelector` values for the given
+/// plugins.
+fn resolve_select(plugins: &[Plugin]) -> HashSet<RuleSelector> {
+    let mut select: HashSet<_> = DEFAULT_SELECTORS.iter().cloned().collect();
+    select.extend(plugins.iter().map(|p| Linter::from(p).into()));
+    select
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashMap;
+    use std::str::FromStr;
+
+    use anyhow::Result;
+    use itertools::Itertools;
+    use pep440_rs::VersionSpecifiers;
+
+    use pretty_assertions::assert_eq;
+    use ruff::line_width::LineLength;
+    use ruff::registry::Linter;
+    use ruff::rule_selector::RuleSelector;
+    use ruff::rules::flake8_quotes;
+    use ruff::rules::pydocstyle::settings::Convention;
+    use ruff::settings::types::PythonVersion;
+    use ruff_workspace::options::{Flake8QuotesOptions, Options, PydocstyleOptions};
+    use ruff_workspace::pyproject::Pyproject;
+
+    use crate::converter::DEFAULT_SELECTORS;
+    use crate::pep621::Project;
+    use crate::ExternalConfig;
+
+    use super::super::plugin::Plugin;
+    use super::convert;
+
+    fn default_options(plugins: impl IntoIterator<Item = RuleSelector>) -> Options {
+        Options {
+            ignore: Some(vec![]),
+            select: Some(
+                DEFAULT_SELECTORS
+                    .iter()
+                    .cloned()
+                    .chain(plugins)
+                    .sorted_by_key(RuleSelector::prefix_and_code)
+                    .collect(),
+            ),
+            ..Options::default()
+        }
+    }
+
+    #[test]
+    fn it_converts_empty() {
+        let actual = convert(
+            &HashMap::from([("flake8".to_string(), HashMap::default())]),
+            &ExternalConfig::default(),
+            None,
+        );
+        let expected = Pyproject::new(default_options([]));
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_converts_dashes() {
+        let actual = convert(
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
+            )]),
+            &ExternalConfig::default(),
+            Some(vec![]),
+        );
+        let expected = Pyproject::new(Options {
+            line_length: Some(LineLength::try_from(100).unwrap()),
+            ..default_options([])
+        });
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_converts_underscores() {
+        let actual = convert(
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
+            )]),
+            &ExternalConfig::default(),
+            Some(vec![]),
+        );
+        let expected = Pyproject::new(Options {
+            line_length: Some(LineLength::try_from(100).unwrap()),
+            ..default_options([])
+        });
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_ignores_parse_errors() {
+        let actual = convert(
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
+            )]),
+            &ExternalConfig::default(),
+            Some(vec![]),
+        );
+        let expected = Pyproject::new(default_options([]));
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_converts_plugin_options() {
+        let actual = convert(
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            )]),
+            &ExternalConfig::default(),
+            Some(vec![]),
+        );
+        let expected = Pyproject::new(Options {
+            flake8_quotes: Some(Flake8QuotesOptions {
+                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
+                multiline_quotes: None,
+                docstring_quotes: None,
+                avoid_escape: None,
+            }),
+            ..default_options([])
+        });
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_converts_docstring_conventions() {
+        let actual = convert(
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([(
+                    "docstring-convention".to_string(),
+                    Some("numpy".to_string()),
+                )]),
+            )]),
+            &ExternalConfig::default(),
+            Some(vec![Plugin::Flake8Docstrings]),
+        );
+        let expected = Pyproject::new(Options {
+            pydocstyle: Some(PydocstyleOptions {
+                convention: Some(Convention::Numpy),
+                ignore_decorators: None,
+                property_decorators: None,
+            }),
+            ..default_options([Linter::Pydocstyle.into()])
+        });
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_infers_plugins_if_omitted() {
+        let actual = convert(
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            )]),
+            &ExternalConfig::default(),
+            None,
+        );
+        let expected = Pyproject::new(Options {
+            flake8_quotes: Some(Flake8QuotesOptions {
+                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
+                multiline_quotes: None,
+                docstring_quotes: None,
+                avoid_escape: None,
+            }),
+            ..default_options([Linter::Flake8Quotes.into()])
+        });
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_converts_project_requires_python() -> Result<()> {
+        let actual = convert(
+            &HashMap::from([("flake8".to_string(), HashMap::default())]),
+            &ExternalConfig {
+                project: Some(&Project {
+                    requires_python: Some(VersionSpecifiers::from_str(">=3.8.16, <3.11")?),
+                }),
+                ..ExternalConfig::default()
+            },
+            Some(vec![]),
+        );
+        let expected = Pyproject::new(Options {
+            target_version: Some(PythonVersion::Py38),
+            ..default_options([])
+        });
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+}

crates/flake8_to_ruff/src/external_config.rs

@@ -0,0 +1,10 @@
+use super::black::Black;
+use super::isort::Isort;
+use super::pep621::Project;
+
+#[derive(Default)]
+pub(crate) struct ExternalConfig<'a> {
+    pub(crate) black: Option<&'a Black>,
+    pub(crate) isort: Option<&'a Isort>,
+    pub(crate) project: Option<&'a Project>,
+}

crates/flake8_to_ruff/src/isort.rs

@@ -0,0 +1,10 @@
+//! Extract isort configuration settings from a pyproject.toml.
+
+use serde::{Deserialize, Serialize};
+
+/// The [isort configuration](https://pycqa.github.io/isort/docs/configuration/config_files.html).
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
+pub(crate) struct Isort {
+    #[serde(alias = "src-paths", alias = "src_paths")]
+    pub(crate) src_paths: Option<Vec<String>>,
+}

crates/flake8_to_ruff/src/main.rs

@@ -0,0 +1,80 @@
+//! Utility to generate Ruff's `pyproject.toml` section from a Flake8 INI file.
+
+mod black;
+mod converter;
+mod external_config;
+mod isort;
+mod parser;
+mod pep621;
+mod plugin;
+mod pyproject;
+
+use std::path::PathBuf;
+
+use anyhow::Result;
+use clap::Parser;
+use configparser::ini::Ini;
+
+use crate::converter::convert;
+use crate::external_config::ExternalConfig;
+use crate::plugin::Plugin;
+use crate::pyproject::parse;
+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<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(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 = convert(&config, &external_config, args.plugin);
+
+    #[allow(clippy::print_stdout)]
+    {
+        println!("{}", toml::to_string_pretty(&pyproject)?);
+    }
+
+    Ok(())
+}

crates/flake8_to_ruff/src/parser.rs

@@ -0,0 +1,390 @@
+use std::str::FromStr;
+
+use anyhow::{bail, Result};
+use once_cell::sync::Lazy;
+use regex::Regex;
+use ruff::settings::types::PatternPrefixPair;
+use ruff::{warn_user, RuleSelector};
+use rustc_hash::FxHashMap;
+
+static COMMA_SEPARATED_LIST_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"[,\s]").unwrap());
+
+/// Parse a comma-separated list of `RuleSelector` values (e.g.,
+/// "F401,E501").
+pub(crate) fn parse_prefix_codes(value: &str) -> Vec<RuleSelector> {
+    let mut codes: Vec<RuleSelector> = vec![];
+    for code in COMMA_SEPARATED_LIST_RE.split(value) {
+        let code = code.trim();
+        if code.is_empty() {
+            continue;
+        }
+        if let Ok(code) = RuleSelector::from_str(code) {
+            codes.push(code);
+        } else {
+            warn_user!("Unsupported prefix code: {code}");
+        }
+    }
+    codes
+}
+
+/// Parse a comma-separated list of strings (e.g., "__init__.py,__main__.py").
+pub(crate) fn parse_strings(value: &str) -> Vec<String> {
+    COMMA_SEPARATED_LIST_RE
+        .split(value)
+        .map(str::trim)
+        .filter(|part| !part.is_empty())
+        .map(String::from)
+        .collect()
+}
+
+/// Parse a boolean.
+pub(crate) fn parse_bool(value: &str) -> Result<bool> {
+    match value.trim() {
+        "true" => Ok(true),
+        "false" => Ok(false),
+        _ => bail!("Unexpected boolean value: {value}"),
+    }
+}
+
+#[derive(Debug)]
+struct Token {
+    token_name: TokenType,
+    src: String,
+}
+
+#[derive(Debug, Copy, Clone)]
+enum TokenType {
+    Code,
+    File,
+    Colon,
+    Comma,
+    Ws,
+    Eof,
+}
+
+struct State {
+    seen_sep: bool,
+    seen_colon: bool,
+    filenames: Vec<String>,
+    codes: Vec<String>,
+}
+
+impl State {
+    const fn new() -> Self {
+        Self {
+            seen_sep: true,
+            seen_colon: false,
+            filenames: vec![],
+            codes: vec![],
+        }
+    }
+
+    /// Generate the list of `StrRuleCodePair` pairs for the current
+    /// state.
+    fn parse(&self) -> Vec<PatternPrefixPair> {
+        let mut codes: Vec<PatternPrefixPair> = vec![];
+        for code in &self.codes {
+            if let Ok(code) = RuleSelector::from_str(code) {
+                for filename in &self.filenames {
+                    codes.push(PatternPrefixPair {
+                        pattern: filename.clone(),
+                        prefix: code.clone(),
+                    });
+                }
+            } else {
+                warn_user!("Unsupported prefix code: {code}");
+            }
+        }
+        codes
+    }
+}
+
+/// Tokenize the raw 'files-to-codes' mapping.
+fn tokenize_files_to_codes_mapping(value: &str) -> Vec<Token> {
+    let mut tokens = vec![];
+    let mut i = 0;
+    while i < value.len() {
+        for (token_re, token_name) in [
+            (
+                Regex::new(r"([A-Z]+[0-9]*)(?:$|\s|,)").unwrap(),
+                TokenType::Code,
+            ),
+            (Regex::new(r"([^\s:,]+)").unwrap(), TokenType::File),
+            (Regex::new(r"(\s*:\s*)").unwrap(), TokenType::Colon),
+            (Regex::new(r"(\s*,\s*)").unwrap(), TokenType::Comma),
+            (Regex::new(r"(\s+)").unwrap(), TokenType::Ws),
+        ] {
+            if let Some(cap) = token_re.captures(&value[i..]) {
+                let mat = cap.get(1).unwrap();
+                if mat.start() == 0 {
+                    tokens.push(Token {
+                        token_name,
+                        src: mat.as_str().trim().to_string(),
+                    });
+                    i += mat.end();
+                    break;
+                }
+            }
+        }
+    }
+    tokens.push(Token {
+        token_name: TokenType::Eof,
+        src: String::new(),
+    });
+    tokens
+}
+
+/// Parse a 'files-to-codes' mapping, mimicking Flake8's internal logic.
+/// See: <https://github.com/PyCQA/flake8/blob/7dfe99616fc2f07c0017df2ba5fa884158f3ea8a/src/flake8/utils.py#L45>
+pub(crate) fn parse_files_to_codes_mapping(value: &str) -> Result<Vec<PatternPrefixPair>> {
+    if value.trim().is_empty() {
+        return Ok(vec![]);
+    }
+    let mut codes: Vec<PatternPrefixPair> = vec![];
+    let mut state = State::new();
+    for token in tokenize_files_to_codes_mapping(value) {
+        if matches!(token.token_name, TokenType::Comma | TokenType::Ws) {
+            state.seen_sep = true;
+        } else if !state.seen_colon {
+            if matches!(token.token_name, TokenType::Colon) {
+                state.seen_colon = true;
+                state.seen_sep = true;
+            } else if state.seen_sep && matches!(token.token_name, TokenType::File) {
+                state.filenames.push(token.src);
+                state.seen_sep = false;
+            } else {
+                bail!("Unexpected token: {:?}", token.token_name);
+            }
+        } else {
+            if matches!(token.token_name, TokenType::Eof) {
+                codes.extend(state.parse());
+                state = State::new();
+            } else if state.seen_sep && matches!(token.token_name, TokenType::Code) {
+                state.codes.push(token.src);
+                state.seen_sep = false;
+            } else if state.seen_sep && matches!(token.token_name, TokenType::File) {
+                codes.extend(state.parse());
+                state = State::new();
+                state.filenames.push(token.src);
+                state.seen_sep = false;
+            } else {
+                bail!("Unexpected token: {:?}", token.token_name);
+            }
+        }
+    }
+    Ok(codes)
+}
+
+/// Collect a list of `PatternPrefixPair` structs as a `BTreeMap`.
+pub(crate) fn collect_per_file_ignores(
+    pairs: Vec<PatternPrefixPair>,
+) -> FxHashMap<String, Vec<RuleSelector>> {
+    let mut per_file_ignores: FxHashMap<String, Vec<RuleSelector>> = FxHashMap::default();
+    for pair in pairs {
+        per_file_ignores
+            .entry(pair.pattern)
+            .or_insert_with(Vec::new)
+            .push(pair.prefix);
+    }
+    per_file_ignores
+}
+
+#[cfg(test)]
+mod tests {
+    use anyhow::Result;
+    use ruff::RuleSelector;
+
+    use ruff::codes;
+    use ruff::registry::Linter;
+    use ruff::settings::types::PatternPrefixPair;
+
+    use super::{parse_files_to_codes_mapping, parse_prefix_codes, parse_strings};
+
+    #[test]
+    fn it_parses_prefix_codes() {
+        let actual = parse_prefix_codes("");
+        let expected: Vec<RuleSelector> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes(" ");
+        let expected: Vec<RuleSelector> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401");
+        let expected = vec![codes::Pyflakes::_401.into()];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401,");
+        let expected = vec![codes::Pyflakes::_401.into()];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401,E501");
+        let expected = vec![
+            codes::Pyflakes::_401.into(),
+            codes::Pycodestyle::E501.into(),
+        ];
+        assert_eq!(actual, expected);
+
+        let actual = parse_prefix_codes("F401, E501");
+        let expected = vec![
+            codes::Pyflakes::_401.into(),
+            codes::Pycodestyle::E501.into(),
+        ];
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_parses_strings() {
+        let actual = parse_strings("");
+        let expected: Vec<String> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_strings(" ");
+        let expected: Vec<String> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_strings("__init__.py");
+        let expected = vec!["__init__.py".to_string()];
+        assert_eq!(actual, expected);
+
+        let actual = parse_strings("__init__.py,");
+        let expected = vec!["__init__.py".to_string()];
+        assert_eq!(actual, expected);
+
+        let actual = parse_strings("__init__.py,__main__.py");
+        let expected = vec!["__init__.py".to_string(), "__main__.py".to_string()];
+        assert_eq!(actual, expected);
+
+        let actual = parse_strings("__init__.py, __main__.py");
+        let expected = vec!["__init__.py".to_string(), "__main__.py".to_string()];
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn it_parse_files_to_codes_mapping() -> Result<()> {
+        let actual = parse_files_to_codes_mapping("")?;
+        let expected: Vec<PatternPrefixPair> = vec![];
+        assert_eq!(actual, expected);
+
+        let actual = parse_files_to_codes_mapping(" ")?;
+        let expected: Vec<PatternPrefixPair> = vec![];
+        assert_eq!(actual, expected);
+
+        // Ex) locust
+        let actual = parse_files_to_codes_mapping(
+            "per-file-ignores =
+    locust/test/*: F841
+    examples/*: F841
+    *.pyi: E302,E704"
+                .strip_prefix("per-file-ignores =")
+                .unwrap(),
+        )?;
+        let expected: Vec<PatternPrefixPair> = vec![
+            PatternPrefixPair {
+                pattern: "locust/test/*".to_string(),
+                prefix: codes::Pyflakes::_841.into(),
+            },
+            PatternPrefixPair {
+                pattern: "examples/*".to_string(),
+                prefix: codes::Pyflakes::_841.into(),
+            },
+        ];
+        assert_eq!(actual, expected);
+
+        // Ex) celery
+        let actual = parse_files_to_codes_mapping(
+            "per-file-ignores =
+   t/*,setup.py,examples/*,docs/*,extra/*:
+       D,"
+            .strip_prefix("per-file-ignores =")
+            .unwrap(),
+        )?;
+        let expected: Vec<PatternPrefixPair> = vec![
+            PatternPrefixPair {
+                pattern: "t/*".to_string(),
+                prefix: Linter::Pydocstyle.into(),
+            },
+            PatternPrefixPair {
+                pattern: "setup.py".to_string(),
+                prefix: Linter::Pydocstyle.into(),
+            },
+            PatternPrefixPair {
+                pattern: "examples/*".to_string(),
+                prefix: Linter::Pydocstyle.into(),
+            },
+            PatternPrefixPair {
+                pattern: "docs/*".to_string(),
+                prefix: Linter::Pydocstyle.into(),
+            },
+            PatternPrefixPair {
+                pattern: "extra/*".to_string(),
+                prefix: Linter::Pydocstyle.into(),
+            },
+        ];
+        assert_eq!(actual, expected);
+
+        // Ex) scrapy
+        let actual = parse_files_to_codes_mapping(
+            "per-file-ignores =
+    scrapy/__init__.py:E402
+    scrapy/core/downloader/handlers/http.py:F401
+    scrapy/http/__init__.py:F401
+    scrapy/linkextractors/__init__.py:E402,F401
+    scrapy/selector/__init__.py:F401
+    scrapy/spiders/__init__.py:E402,F401
+    scrapy/utils/url.py:F403,F405
+    tests/test_loader.py:E741"
+                .strip_prefix("per-file-ignores =")
+                .unwrap(),
+        )?;
+        let expected: Vec<PatternPrefixPair> = vec![
+            PatternPrefixPair {
+                pattern: "scrapy/__init__.py".to_string(),
+                prefix: codes::Pycodestyle::E402.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/core/downloader/handlers/http.py".to_string(),
+                prefix: codes::Pyflakes::_401.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/http/__init__.py".to_string(),
+                prefix: codes::Pyflakes::_401.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/linkextractors/__init__.py".to_string(),
+                prefix: codes::Pycodestyle::E402.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/linkextractors/__init__.py".to_string(),
+                prefix: codes::Pyflakes::_401.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/selector/__init__.py".to_string(),
+                prefix: codes::Pyflakes::_401.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/spiders/__init__.py".to_string(),
+                prefix: codes::Pycodestyle::E402.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/spiders/__init__.py".to_string(),
+                prefix: codes::Pyflakes::_401.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/utils/url.py".to_string(),
+                prefix: codes::Pyflakes::_403.into(),
+            },
+            PatternPrefixPair {
+                pattern: "scrapy/utils/url.py".to_string(),
+                prefix: codes::Pyflakes::_405.into(),
+            },
+            PatternPrefixPair {
+                pattern: "tests/test_loader.py".to_string(),
+                prefix: codes::Pycodestyle::E741.into(),
+            },
+        ];
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+}

crates/flake8_to_ruff/src/pep621.rs

@@ -0,0 +1,10 @@
+//! Extract PEP 621 configuration settings from a pyproject.toml.
+
+use pep440_rs::VersionSpecifiers;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
+pub(crate) struct Project {
+    #[serde(alias = "requires-python", alias = "requires_python")]
+    pub(crate) requires_python: Option<VersionSpecifiers>,
+}

crates/flake8_to_ruff/src/plugin.rs

@@ -0,0 +1,368 @@
+use std::collections::{BTreeSet, HashMap, HashSet};
+use std::fmt;
+use std::str::FromStr;
+
+use anyhow::anyhow;
+use ruff::registry::Linter;
+use ruff::settings::types::PreviewMode;
+use ruff::RuleSelector;
+
+#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
+pub enum Plugin {
+    Flake82020,
+    Flake8Annotations,
+    Flake8Bandit,
+    Flake8BlindExcept,
+    Flake8BooleanTrap,
+    Flake8Bugbear,
+    Flake8Builtins,
+    Flake8Commas,
+    Flake8Comprehensions,
+    Flake8Datetimez,
+    Flake8Debugger,
+    Flake8Docstrings,
+    Flake8Eradicate,
+    Flake8ErrMsg,
+    Flake8Executable,
+    Flake8ImplicitStrConcat,
+    Flake8ImportConventions,
+    Flake8NoPep420,
+    Flake8Pie,
+    Flake8Print,
+    Flake8PytestStyle,
+    Flake8Quotes,
+    Flake8Return,
+    Flake8Simplify,
+    Flake8TidyImports,
+    Flake8TypeChecking,
+    Flake8UnusedArguments,
+    Flake8UsePathlib,
+    McCabe,
+    PEP8Naming,
+    PandasVet,
+    Pyupgrade,
+    Tryceratops,
+}
+
+impl FromStr for Plugin {
+    type Err = anyhow::Error;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        match string {
+            "flake8-2020" => Ok(Plugin::Flake82020),
+            "flake8-annotations" => Ok(Plugin::Flake8Annotations),
+            "flake8-bandit" => Ok(Plugin::Flake8Bandit),
+            "flake8-blind-except" => Ok(Plugin::Flake8BlindExcept),
+            "flake8-boolean-trap" => Ok(Plugin::Flake8BooleanTrap),
+            "flake8-bugbear" => Ok(Plugin::Flake8Bugbear),
+            "flake8-builtins" => Ok(Plugin::Flake8Builtins),
+            "flake8-commas" => Ok(Plugin::Flake8Commas),
+            "flake8-comprehensions" => Ok(Plugin::Flake8Comprehensions),
+            "flake8-datetimez" => Ok(Plugin::Flake8Datetimez),
+            "flake8-debugger" => Ok(Plugin::Flake8Debugger),
+            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
+            "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
+            "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
+            "flake8-executable" => Ok(Plugin::Flake8Executable),
+            "flake8-implicit-str-concat" => Ok(Plugin::Flake8ImplicitStrConcat),
+            "flake8-import-conventions" => Ok(Plugin::Flake8ImportConventions),
+            "flake8-no-pep420" => Ok(Plugin::Flake8NoPep420),
+            "flake8-pie" => Ok(Plugin::Flake8Pie),
+            "flake8-print" => Ok(Plugin::Flake8Print),
+            "flake8-pytest-style" => Ok(Plugin::Flake8PytestStyle),
+            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
+            "flake8-return" => Ok(Plugin::Flake8Return),
+            "flake8-simplify" => Ok(Plugin::Flake8Simplify),
+            "flake8-tidy-imports" => Ok(Plugin::Flake8TidyImports),
+            "flake8-type-checking" => Ok(Plugin::Flake8TypeChecking),
+            "flake8-unused-arguments" => Ok(Plugin::Flake8UnusedArguments),
+            "flake8-use-pathlib" => Ok(Plugin::Flake8UsePathlib),
+            "mccabe" => Ok(Plugin::McCabe),
+            "pep8-naming" => Ok(Plugin::PEP8Naming),
+            "pandas-vet" => Ok(Plugin::PandasVet),
+            "pyupgrade" => Ok(Plugin::Pyupgrade),
+            "tryceratops" => Ok(Plugin::Tryceratops),
+            _ => Err(anyhow!("Unknown plugin: {string}")),
+        }
+    }
+}
+
+impl fmt::Debug for Plugin {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Plugin::Flake82020 => "flake8-2020",
+                Plugin::Flake8Annotations => "flake8-annotations",
+                Plugin::Flake8Bandit => "flake8-bandit",
+                Plugin::Flake8BlindExcept => "flake8-blind-except",
+                Plugin::Flake8BooleanTrap => "flake8-boolean-trap",
+                Plugin::Flake8Bugbear => "flake8-bugbear",
+                Plugin::Flake8Builtins => "flake8-builtins",
+                Plugin::Flake8Commas => "flake8-commas",
+                Plugin::Flake8Comprehensions => "flake8-comprehensions",
+                Plugin::Flake8Datetimez => "flake8-datetimez",
+                Plugin::Flake8Debugger => "flake8-debugger",
+                Plugin::Flake8Docstrings => "flake8-docstrings",
+                Plugin::Flake8Eradicate => "flake8-eradicate",
+                Plugin::Flake8ErrMsg => "flake8-errmsg",
+                Plugin::Flake8Executable => "flake8-executable",
+                Plugin::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
+                Plugin::Flake8ImportConventions => "flake8-import-conventions",
+                Plugin::Flake8NoPep420 => "flake8-no-pep420",
+                Plugin::Flake8Pie => "flake8-pie",
+                Plugin::Flake8Print => "flake8-print",
+                Plugin::Flake8PytestStyle => "flake8-pytest-style",
+                Plugin::Flake8Quotes => "flake8-quotes",
+                Plugin::Flake8Return => "flake8-return",
+                Plugin::Flake8Simplify => "flake8-simplify",
+                Plugin::Flake8TidyImports => "flake8-tidy-imports",
+                Plugin::Flake8TypeChecking => "flake8-type-checking",
+                Plugin::Flake8UnusedArguments => "flake8-unused-arguments",
+                Plugin::Flake8UsePathlib => "flake8-use-pathlib",
+                Plugin::McCabe => "mccabe",
+                Plugin::PEP8Naming => "pep8-naming",
+                Plugin::PandasVet => "pandas-vet",
+                Plugin::Pyupgrade => "pyupgrade",
+                Plugin::Tryceratops => "tryceratops",
+            }
+        )
+    }
+}
+
+impl From<&Plugin> for Linter {
+    fn from(plugin: &Plugin) -> Self {
+        match plugin {
+            Plugin::Flake82020 => Linter::Flake82020,
+            Plugin::Flake8Annotations => Linter::Flake8Annotations,
+            Plugin::Flake8Bandit => Linter::Flake8Bandit,
+            Plugin::Flake8BlindExcept => Linter::Flake8BlindExcept,
+            Plugin::Flake8BooleanTrap => Linter::Flake8BooleanTrap,
+            Plugin::Flake8Bugbear => Linter::Flake8Bugbear,
+            Plugin::Flake8Builtins => Linter::Flake8Builtins,
+            Plugin::Flake8Commas => Linter::Flake8Commas,
+            Plugin::Flake8Comprehensions => Linter::Flake8Comprehensions,
+            Plugin::Flake8Datetimez => Linter::Flake8Datetimez,
+            Plugin::Flake8Debugger => Linter::Flake8Debugger,
+            Plugin::Flake8Docstrings => Linter::Pydocstyle,
+            Plugin::Flake8Eradicate => Linter::Eradicate,
+            Plugin::Flake8ErrMsg => Linter::Flake8ErrMsg,
+            Plugin::Flake8Executable => Linter::Flake8Executable,
+            Plugin::Flake8ImplicitStrConcat => Linter::Flake8ImplicitStrConcat,
+            Plugin::Flake8ImportConventions => Linter::Flake8ImportConventions,
+            Plugin::Flake8NoPep420 => Linter::Flake8NoPep420,
+            Plugin::Flake8Pie => Linter::Flake8Pie,
+            Plugin::Flake8Print => Linter::Flake8Print,
+            Plugin::Flake8PytestStyle => Linter::Flake8PytestStyle,
+            Plugin::Flake8Quotes => Linter::Flake8Quotes,
+            Plugin::Flake8Return => Linter::Flake8Return,
+            Plugin::Flake8Simplify => Linter::Flake8Simplify,
+            Plugin::Flake8TidyImports => Linter::Flake8TidyImports,
+            Plugin::Flake8TypeChecking => Linter::Flake8TypeChecking,
+            Plugin::Flake8UnusedArguments => Linter::Flake8UnusedArguments,
+            Plugin::Flake8UsePathlib => Linter::Flake8UsePathlib,
+            Plugin::McCabe => Linter::McCabe,
+            Plugin::PEP8Naming => Linter::PEP8Naming,
+            Plugin::PandasVet => Linter::PandasVet,
+            Plugin::Pyupgrade => Linter::Pyupgrade,
+            Plugin::Tryceratops => Linter::Tryceratops,
+        }
+    }
+}
+
+/// Infer the enabled plugins based on user-provided options.
+///
+/// For example, if the user specified a `mypy-init-return` setting, we should
+/// infer that `flake8-annotations` is active.
+pub(crate) fn infer_plugins_from_options(flake8: &HashMap<String, Option<String>>) -> Vec<Plugin> {
+    let mut plugins = BTreeSet::new();
+    for key in flake8.keys() {
+        match key.as_str() {
+            // flake8-annotations
+            "suppress-none-returning" | "suppress_none_returning" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "suppress-dummy-args" | "suppress_dummy_args" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "allow-untyped-defs" | "allow_untyped_defs" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "allow-untyped-nested" | "allow_untyped_nested" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "mypy-init-return" | "mypy_init_return" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "dispatch-decorators" | "dispatch_decorators" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "overload-decorators" | "overload_decorators" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            "allow-star-arg-any" | "allow_star_arg_any" => {
+                plugins.insert(Plugin::Flake8Annotations);
+            }
+            // flake8-bugbear
+            "extend-immutable-calls" | "extend_immutable_calls" => {
+                plugins.insert(Plugin::Flake8Bugbear);
+            }
+            // flake8-builtins
+            "builtins-ignorelist" | "builtins_ignorelist" => {
+                plugins.insert(Plugin::Flake8Builtins);
+            }
+            // flake8-docstrings
+            "docstring-convention" | "docstring_convention" => {
+                plugins.insert(Plugin::Flake8Docstrings);
+            }
+            // flake8-eradicate
+            "eradicate-aggressive" | "eradicate_aggressive" => {
+                plugins.insert(Plugin::Flake8Eradicate);
+            }
+            "eradicate-whitelist" | "eradicate_whitelist" => {
+                plugins.insert(Plugin::Flake8Eradicate);
+            }
+            "eradicate-whitelist-extend" | "eradicate_whitelist_extend" => {
+                plugins.insert(Plugin::Flake8Eradicate);
+            }
+            // flake8-pytest-style
+            "pytest-fixture-no-parentheses" | "pytest_fixture_no_parentheses " => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-parametrize-names-type" | "pytest_parametrize_names_type" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-parametrize-values-type" | "pytest_parametrize_values_type" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-parametrize-values-row-type" | "pytest_parametrize_values_row_type" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-raises-require-match-for" | "pytest_raises_require_match_for" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-mark-no-parentheses" | "pytest_mark_no_parentheses" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            // flake8-quotes
+            "quotes" | "inline-quotes" | "inline_quotes" => {
+                plugins.insert(Plugin::Flake8Quotes);
+            }
+            "multiline-quotes" | "multiline_quotes" => {
+                plugins.insert(Plugin::Flake8Quotes);
+            }
+            "docstring-quotes" | "docstring_quotes" => {
+                plugins.insert(Plugin::Flake8Quotes);
+            }
+            "avoid-escape" | "avoid_escape" => {
+                plugins.insert(Plugin::Flake8Quotes);
+            }
+            // flake8-tidy-imports
+            "ban-relative-imports" | "ban_relative_imports" => {
+                plugins.insert(Plugin::Flake8TidyImports);
+            }
+            "banned-modules" | "banned_modules" => {
+                plugins.insert(Plugin::Flake8TidyImports);
+            }
+            // mccabe
+            "max-complexity" | "max_complexity" => {
+                plugins.insert(Plugin::McCabe);
+            }
+            // pep8-naming
+            "ignore-names" | "ignore_names" => {
+                plugins.insert(Plugin::PEP8Naming);
+            }
+            "classmethod-decorators" | "classmethod_decorators" => {
+                plugins.insert(Plugin::PEP8Naming);
+            }
+            "staticmethod-decorators" | "staticmethod_decorators" => {
+                plugins.insert(Plugin::PEP8Naming);
+            }
+            "max-string-length" | "max_string_length" => {
+                plugins.insert(Plugin::Flake8ErrMsg);
+            }
+            _ => {}
+        }
+    }
+    Vec::from_iter(plugins)
+}
+
+/// Infer the enabled plugins based on the referenced prefixes.
+///
+/// For example, if the user ignores `ANN101`, we should infer that
+/// `flake8-annotations` is active.
+pub(crate) fn infer_plugins_from_codes(selectors: &HashSet<RuleSelector>) -> Vec<Plugin> {
+    // Ignore cases in which we've knowingly changed rule prefixes.
+    [
+        Plugin::Flake82020,
+        Plugin::Flake8Annotations,
+        Plugin::Flake8Bandit,
+        // Plugin::Flake8BlindExcept,
+        Plugin::Flake8BooleanTrap,
+        Plugin::Flake8Bugbear,
+        Plugin::Flake8Builtins,
+        // Plugin::Flake8Commas,
+        Plugin::Flake8Comprehensions,
+        Plugin::Flake8Datetimez,
+        Plugin::Flake8Debugger,
+        Plugin::Flake8Docstrings,
+        // Plugin::Flake8Eradicate,
+        Plugin::Flake8ErrMsg,
+        Plugin::Flake8Executable,
+        Plugin::Flake8ImplicitStrConcat,
+        // Plugin::Flake8ImportConventions,
+        Plugin::Flake8NoPep420,
+        Plugin::Flake8Pie,
+        Plugin::Flake8Print,
+        Plugin::Flake8PytestStyle,
+        Plugin::Flake8Quotes,
+        Plugin::Flake8Return,
+        Plugin::Flake8Simplify,
+        // Plugin::Flake8TidyImports,
+        // Plugin::Flake8TypeChecking,
+        Plugin::Flake8UnusedArguments,
+        // Plugin::Flake8UsePathlib,
+        Plugin::McCabe,
+        Plugin::PEP8Naming,
+        Plugin::PandasVet,
+        Plugin::Tryceratops,
+    ]
+    .into_iter()
+    .filter(|plugin| {
+        for selector in selectors {
+            if selector
+                .rules(PreviewMode::Disabled)
+                .any(|rule| Linter::from(plugin).rules().any(|r| r == rule))
+            {
+                return true;
+            }
+        }
+        false
+    })
+    .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashMap;
+
+    use super::{infer_plugins_from_options, Plugin};
+
+    #[test]
+    fn it_infers_plugins() {
+        let actual = infer_plugins_from_options(&HashMap::from([(
+            "inline-quotes".to_string(),
+            Some("single".to_string()),
+        )]));
+        let expected = vec![Plugin::Flake8Quotes];
+        assert_eq!(actual, expected);
+
+        let actual = infer_plugins_from_options(&HashMap::from([(
+            "staticmethod-decorators".to_string(),
+            Some("[]".to_string()),
+        )]));
+        let expected = vec![Plugin::PEP8Naming];
+        assert_eq!(actual, expected);
+    }
+}

crates/flake8_to_ruff/src/pyproject.rs

@@ -0,0 +1,26 @@
+use std::path::Path;
+
+use anyhow::Result;
+use serde::{Deserialize, Serialize};
+
+use super::black::Black;
+use super::isort::Isort;
+use super::pep621::Project;
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub(crate) struct Tools {
+    pub(crate) black: Option<Black>,
+    pub(crate) isort: Option<Isort>,
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub(crate) struct Pyproject {
+    pub(crate) tool: Option<Tools>,
+    pub(crate) project: Option<Project>,
+}
+
+pub(crate) fn parse<P: AsRef<Path>>(path: P) -> Result<Pyproject> {
+    let contents = std::fs::read_to_string(path)?;
+    let pyproject = toml::from_str::<Pyproject>(&contents)?;
+    Ok(pyproject)
+}

crates/ruff/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.2.1"
+version = "0.0.290"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }
@@ -9,68 +9,83 @@ homepage = { workspace = true }
 documentation = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
-readme = "../../README.md"
-default-run = "ruff"
+readme = "README.md"
+
+[lib]
+name = "ruff"
 
 [dependencies]
 ruff_cache = { path = "../ruff_cache" }
-ruff_diagnostics = { path = "../ruff_diagnostics" }
-ruff_linter = { path = "../ruff_linter", features = ["clap"] }
-ruff_macros = { path = "../ruff_macros" }
+ruff_diagnostics = { path = "../ruff_diagnostics", features = ["serde"] }
+ruff_index = { path = "../ruff_index" }
 ruff_notebook = { path = "../ruff_notebook" }
-ruff_python_ast = { path = "../ruff_python_ast" }
-ruff_python_formatter = { path = "../ruff_python_formatter" }
-ruff_source_file = { path = "../ruff_source_file" }
+ruff_macros = { path = "../ruff_macros" }
+ruff_python_ast = { path = "../ruff_python_ast", features = ["serde"] }
+ruff_python_codegen = { path = "../ruff_python_codegen" }
+ruff_python_index = { path = "../ruff_python_index" }
+ruff_python_literal = { path = "../ruff_python_literal" }
+ruff_python_semantic = { path = "../ruff_python_semantic" }
+ruff_python_stdlib = { path = "../ruff_python_stdlib" }
+ruff_python_trivia = { path = "../ruff_python_trivia" }
+ruff_python_parser = { path = "../ruff_python_parser" }
+ruff_source_file = { path = "../ruff_source_file", features = ["serde"] }
 ruff_text_size = { path = "../ruff_text_size" }
-ruff_workspace = { path = "../ruff_workspace" }
 
+annotate-snippets = { version = "0.9.1", features = ["color"] }
 anyhow = { workspace = true }
-argfile = { workspace = true }
-bincode = { workspace = true }
 bitflags = { workspace = true }
-cachedir = { workspace = true }
 chrono = { workspace = true }
-clap = { workspace = true, features = ["derive", "env", "wrap_help"] }
-clap_complete_command = { workspace = true }
-clearscreen = { workspace = true }
+clap = { workspace = true, features = ["derive", "string"], optional = true }
 colored = { workspace = true }
-filetime = { workspace = true }
-ignore = { workspace = true }
+fern = { version = "0.6.1" }
+glob = { workspace = true }
+globset = { workspace = true }
+imperative = { version = "1.0.4" }
 is-macro = { workspace = true }
 itertools = { workspace = true }
+libcst = { workspace = true }
 log = { workspace = true }
-notify = { workspace = true }
-path-absolutize = { workspace = true, features = ["once_cell_cache"] }
-rayon = { workspace = true }
+malachite = { workspace = true }
+memchr = { workspace = true }
+natord = { version = "1.0.9" }
+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 = "0.7.0" }
+quick-junit = { version = "0.3.2" }
 regex = { workspace = true }
+result-like = { version = "0.4.6" }
 rustc-hash = { workspace = true }
+schemars = { workspace = true, optional = true }
+semver = { version = "1.0.16" }
 serde = { workspace = true }
 serde_json = { workspace = true }
-shellexpand = { workspace = true }
-strum = { workspace = true, features = [] }
-tempfile = { workspace = true }
+similar = { workspace = true }
+smallvec = { workspace = true }
+strum = { workspace = true }
+strum_macros = { workspace = true }
 thiserror = { workspace = true }
 toml = { workspace = true }
-tracing = { workspace = true, features = ["log"] }
-walkdir = { workspace = true }
-wild = { workspace = true }
+typed-arena = { version = "2.0.2" }
+unicode-width = { workspace = true }
+unicode_names2 = { version = "0.6.0", git = "https://github.com/youknowone/unicode_names2.git", rev = "4ce16aa85cbcdd9cc830410f1a72ef9a235f2fde" }
+wsl = { version = "0.1.0" }
 
 [dev-dependencies]
-# Enable test rules during development
-ruff_linter = { path = "../ruff_linter", features = ["clap", "test-rules"] }
-assert_cmd = { workspace = true }
-# Avoid writing colored snapshots when running tests from the terminal
-colored = { workspace = true, features = ["no-color"]}
-insta = { workspace = true, features = ["filters", "json"] }
-insta-cmd = { workspace = true }
-tempfile = { workspace = true }
+insta = { workspace = true }
+pretty_assertions = "1.3.0"
 test-case = { workspace = true }
+# Disable colored output in tests
+colored = { workspace = true, features = ["no-color"] }
+tempfile = "3.6.0"
 
-[target.'cfg(target_os = "windows")'.dependencies]
-mimalloc = { workspace = true }
-
-[target.'cfg(all(not(target_os = "windows"), not(target_os = "openbsd"), any(target_arch = "x86_64", target_arch = "aarch64", target_arch = "powerpc64")))'.dependencies]
-tikv-jemallocator = { workspace = true }
-
-[lints]
-workspace = true
+[features]
+default = []
+schemars = ["dep:schemars"]
+# Enables the UnreachableCode rule
+unreachable-code = []

crates/ruff/build.rs

@@ -1,80 +0,0 @@
-use std::{fs, path::Path, process::Command};
-
-fn main() {
-    // The workspace root directory is not available without walking up the tree
-    // https://github.com/rust-lang/cargo/issues/3946
-    let workspace_root = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap())
-        .join("..")
-        .join("..");
-
-    commit_info(&workspace_root);
-
-    #[allow(clippy::disallowed_methods)]
-    let target = std::env::var("TARGET").unwrap();
-    println!("cargo:rustc-env=RUST_HOST_TARGET={target}");
-}
-
-fn commit_info(workspace_root: &Path) {
-    // If not in a git repository, do not attempt to retrieve commit information
-    let git_dir = workspace_root.join(".git");
-    if !git_dir.exists() {
-        return;
-    }
-
-    let git_head_path = git_dir.join("HEAD");
-    println!(
-        "cargo:rerun-if-changed={}",
-        git_head_path.as_path().display()
-    );
-
-    let git_head_contents = fs::read_to_string(git_head_path);
-    if let Ok(git_head_contents) = git_head_contents {
-        // The contents are either a commit or a reference in the following formats
-        // - "<commit>" when the head is detached
-        // - "ref <ref>" when working on a branch
-        // If a commit, checking if the HEAD file has changed is sufficient
-        // If a ref, we need to add the head file for that ref to rebuild on commit
-        let mut git_ref_parts = git_head_contents.split_whitespace();
-        git_ref_parts.next();
-        if let Some(git_ref) = git_ref_parts.next() {
-            let git_ref_path = git_dir.join(git_ref);
-            println!(
-                "cargo:rerun-if-changed={}",
-                git_ref_path.as_path().display()
-            );
-        }
-    }
-
-    let output = match Command::new("git")
-        .arg("log")
-        .arg("-1")
-        .arg("--date=short")
-        .arg("--abbrev=9")
-        .arg("--format=%H %h %cd %(describe)")
-        .output()
-    {
-        Ok(output) if output.status.success() => output,
-        _ => return,
-    };
-    let stdout = String::from_utf8(output.stdout).unwrap();
-    let mut parts = stdout.split_whitespace();
-    let mut next = || parts.next().unwrap();
-    println!("cargo:rustc-env=RUFF_COMMIT_HASH={}", next());
-    println!("cargo:rustc-env=RUFF_COMMIT_SHORT_HASH={}", next());
-    println!("cargo:rustc-env=RUFF_COMMIT_DATE={}", next());
-
-    // Describe can fail for some commits
-    // https://git-scm.com/docs/pretty-formats#Documentation/pretty-formats.txt-emdescribeoptionsem
-    if let Some(describe) = parts.next() {
-        let mut describe_parts = describe.split('-');
-        println!(
-            "cargo:rustc-env=RUFF_LAST_TAG={}",
-            describe_parts.next().unwrap()
-        );
-        // If this is the tagged commit, this component will be missing
-        println!(
-            "cargo:rustc-env=RUFF_LAST_TAG_DISTANCE={}",
-            describe_parts.next().unwrap_or("0")
-        );
-    }
-}

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

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

crates/ruff/resources/test/fixtures/control-flow-graph/for.py

@@ -0,0 +1,41 @@
+def func():
+    for i in range(5):
+        print(i)
+
+def func():
+    for i in range(20):
+        print(i)
+    else:
+        return 0
+
+def func():
+    for i in range(10):
+        if i == 5:
+            return 1
+    return 0
+
+def func():
+    for i in range(111):
+        if i == 5:
+            return 1
+    else:
+        return 0
+    return 2
+
+def func():
+    for i in range(12):
+        continue
+
+def func():
+    for i in range(1110):
+        if True:
+            continue
+
+def func():
+    for i in range(13):
+        break
+
+def func():
+    for i in range(1110):
+        if True:
+            break

crates/ruff/resources/test/fixtures/control-flow-graph/match.py

@@ -129,11 +129,3 @@ def func():
             print("Grass is green")
         case Color.BLUE:
             print("I'm feeling the blues :(")
-
-
-def func(point):
-    match point:
-        case (0, 0):
-            print("Origin")
-        case foo:
-            raise ValueError("oops")

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

@@ -158,9 +158,3 @@ class Foo:
     @decorator()
     def __init__(self: "Foo", foo: int):
        ...
-
-
-# Regression test for: https://github.com/astral-sh/ruff/issues/7711
-class Class:
-    def __init__(self):
-        print(f"{self.attr=}")

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_bandit/S103.py

@@ -20,4 +20,3 @@ 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
-os.chmod("/etc/passwd", 0o100000000)  # Error

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

@@ -8,7 +8,6 @@ def func(address):
 # Error
 "0.0.0.0"
 '0.0.0.0'
-f"0.0.0.0"
 
 
 # Error

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

@@ -5,9 +5,6 @@ with open("/abc/tmp", "w") as f:
 with open("/tmp/abc", "w") as f:
     f.write("def")
 
-with open(f"/tmp/abc", "w") as f:
-    f.write("def")
-
 with open("/var/tmp/123", "w") as f:
     f.write("def")