Bump version to 0.0.48

Add pattern matching limitation to README.md
Adds flake8-builtins (#284 )
2022-09-29 16:40:01 -04:00 · 2022-09-29 16:39:25 -04:00 · 2022-09-29 16:37:43 -04:00 · 2022-09-29 15:10:25 -04:00 · 2022-09-29 07:15:07 -04:00 · 2022-09-28 22:30:48 -04:00
110 changed files with 5837 additions and 1635 deletions
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -16,7 +16,7 @@ env:
  PYTHON_VERSION: "3.7" # to build abi3 wheels

 jobs:
-  macos:
+  macos-x86_64:
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v3
@@ -39,6 +39,25 @@ jobs:
      - name: Install built wheel - x86_64
        run: |
          pip install dist/${{ env.PACKAGE_NAME }}-*.whl --force-reinstall
+      - name: Upload wheels
+        uses: actions/upload-artifact@v2
+        with:
+          name: wheels
+          path: dist
+  macos-universal:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          architecture: x64
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          default: true
      - name: Build wheels - universal2
        uses: messense/maturin-action@v1
        with:
@@ -261,7 +280,8 @@ jobs:
    name: Release
    runs-on: ubuntu-latest
    needs:
-      - macos
+      - macos-universal
+      - macos-x86_64
      - windows
      - linux
      - linux-cross
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,5 @@
 repos:
-  - repo: https://github.com/charliermarsh/ruff
-    rev: v0.0.33
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.0.40
    hooks:
      - id: lint
--- a/.pre-commit-hooks.yaml
+++ b/.pre-commit-hooks.yaml
@@ -1,7 +0,0 @@
- id: lint
-  name: ruff lint
-  description: Run ruff to lint Python files.
-  entry: ruff
-  language: python
-  types_or: [python]
-  pass_filenames: true
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -382,26 +382,24 @@ checksum = "fff857943da45f546682664a79488be82e69e43c1a7a2307679ab9afb3a66d2e"

 [[package]]
 name = "clap"
-version = "3.2.16"
+version = "4.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3dbbb6653e7c55cc8595ad3e1f7be8f32aba4eb7ff7f0fd1163d4f3d137c0a9"
+checksum = "dd03107d0f87139c1774a15f3db2165b0652b5460c58c27e561f89c20c599eaf"
 dependencies = [
 "atty",
 "bitflags",
 "clap_derive",
 "clap_lex",
- "indexmap",
 "once_cell",
 "strsim",
 "termcolor",
- "textwrap",
 ]

 [[package]]
 name = "clap_derive"
-version = "3.2.15"
+version = "4.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ba52acd3b0a5c33aeada5cdaa3267cdc7c594a98731d4268cdc1532f4264cb4"
+checksum = "ca689d7434ce44517a12a89456b2be4d1ea1cafcd8f581978c03d45f5a5c12a7"
 dependencies = [
 "heck",
 "proc-macro-error",
@@ -412,9 +410,9 @@ dependencies = [

 [[package]]
 name = "clap_lex"
-version = "0.2.4"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+checksum = "0d4198f73e42b4936b35b5bb248d81d2b595ecb170da0bac7655c54eedfa8da8"
 dependencies = [
 "os_str_bytes",
 ]
@@ -458,6 +456,19 @@ dependencies = [
 "cache-padded",
 ]

+[[package]]
+name = "console"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89eab4d20ce20cea182308bca13088fecea9c05f6776cf287205d41a0ed3c847"
+dependencies = [
+ "encode_unicode",
+ "libc",
+ "once_cell",
+ "terminal_size",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
@@ -652,6 +663,12 @@ dependencies = [
 "log",
 ]

+[[package]]
+name = "encode_unicode"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
+
 [[package]]
 name = "event-listener"
 version = "2.5.3"
@@ -1011,6 +1028,20 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "insta"
+version = "1.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc61e98be01e89296f3343a878e9f8ca75a494cb5aaf29df65ef55734aeb85f5"
+dependencies = [
+ "console",
+ "linked-hash-map",
+ "once_cell",
+ "serde",
+ "similar",
+ "yaml-rust",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -1122,6 +1153,12 @@ version = "0.2.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "505e71a4706fa491e9b1b55f51b95d4037d0821ee40131190475f692b35b009b"

+[[package]]
+name = "linked-hash-map"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
+
 [[package]]
 name = "lock_api"
 version = "0.4.7"
@@ -1393,6 +1430,24 @@ dependencies = [
 "windows-sys",
 ]

+[[package]]
+name = "path-absolutize"
+version = "3.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3de4b40bd9736640f14c438304c09538159802388febb02c8abaae0846c1f13"
+dependencies = [
+ "path-dedot",
+]
+
+[[package]]
+name = "path-dedot"
+version = "3.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d611d5291372b3738a34ebf0d1f849e58b1dcc1101032f76a346eaa1f8ddbb5b"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -1744,7 +1799,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.33"
+version = "0.0.48"
 dependencies = [
 "anyhow",
 "bincode",
@@ -1758,11 +1813,12 @@ dependencies = [
 "fern",
 "filetime",
 "glob",
+ "insta",
 "itertools",
- "lazy_static",
 "log",
 "notify",
 "once_cell",
+ "path-absolutize",
 "rayon",
 "regex",
 "rustpython-parser",
@@ -1788,7 +1844,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=7d21c6923a506e79cc041708d83cef925efd33f4#7d21c6923a506e79cc041708d83cef925efd33f4"
+source = "git+https://github.com/charliermarsh/RustPython.git?rev=966a80597d626a9a47eaec78471164422d341453#966a80597d626a9a47eaec78471164422d341453"
 dependencies = [
 "num-bigint",
 "rustpython-compiler-core",
@@ -1797,7 +1853,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=7d21c6923a506e79cc041708d83cef925efd33f4#7d21c6923a506e79cc041708d83cef925efd33f4"
+source = "git+https://github.com/charliermarsh/RustPython.git?rev=966a80597d626a9a47eaec78471164422d341453#966a80597d626a9a47eaec78471164422d341453"
 dependencies = [
 "bincode",
 "bitflags",
@@ -1814,7 +1870,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=7d21c6923a506e79cc041708d83cef925efd33f4#7d21c6923a506e79cc041708d83cef925efd33f4"
+source = "git+https://github.com/charliermarsh/RustPython.git?rev=966a80597d626a9a47eaec78471164422d341453#966a80597d626a9a47eaec78471164422d341453"
 dependencies = [
 "ahash",
 "anyhow",
@@ -1978,6 +2034,12 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "similar"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62ac7f900db32bf3fd12e0117dd3dc4da74bc52ebaac97f39668446d89694803"
+
 [[package]]
 name = "siphasher"
 version = "0.3.10"
@@ -2100,6 +2162,16 @@ dependencies = [
 "winapi-util",
 ]

+[[package]]
+name = "terminal_size"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "633c1a546cee861a1a6d0dc69ebeca693bf4296661ba7852b9d21d159e0506df"
+dependencies = [
+ "libc",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "terminfo"
 version = "0.7.3"
@@ -2113,12 +2185,6 @@ dependencies = [
 "phf_codegen 0.8.0",
 ]

-[[package]]
-name = "textwrap"
-version = "0.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1141d4d61095b28419e22cb0bbf02755f5e54e0526f97f1e3d1d160e60885fb"
-
 [[package]]
 name = "thiserror"
 version = "1.0.32"
@@ -2595,3 +2661,12 @@ dependencies = [
 "winapi 0.2.8",
 "winapi-build",
 ]
+
+[[package]]
+name = "yaml-rust"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
+dependencies = [
+ "linked-hash-map",
+]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.0.33"
+version = "0.0.48"
 edition = "2021"

 [lib]
@@ -11,7 +11,7 @@ anyhow = { version = "1.0.60" }
 bincode = { version = "1.3.3" }
 cacache = { version = "10.0.1" }
 chrono = { version = "0.4.21" }
-clap = { version = "3.2.16", features = ["derive"] }
+clap = { version = "4.0.1", features = ["derive"] }
 clearscreen = { version = "1.0.10" }
 colored = { version = "2.0.0" }
 common-path = { version = "1.0.0" }
@@ -19,20 +19,23 @@ dirs = { version = "4.0.0" }
 fern = { version = "0.6.1" }
 filetime = { version = "0.2.17" }
 glob = { version = "0.3.0" }
-itertools = "0.10.3"
-lazy_static = "1.4.0"
+itertools = { version = "0.10.3" }
 log = { version = "0.4.17" }
 notify = { version = "4.0.17" }
 once_cell = { version = "1.13.1" }
+path-absolutize = { version = "3.0.13", features = ["once_cell_cache"] }
 rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/charliermarsh/RustPython.git", rev = "7d21c6923a506e79cc041708d83cef925efd33f4" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/charliermarsh/RustPython.git", rev = "966a80597d626a9a47eaec78471164422d341453" }
 serde = { version = "1.0.143", features = ["derive"] }
 serde_json = { version = "1.0.83" }
 toml = { version = "0.5.9" }
 update-informer = { version = "0.5.0", default_features = false, features = ["pypi"], optional = true }
 walkdir = { version = "2.3.2" }

+[dev-dependencies]
+insta = { version = "1.19.1", features = ["yaml"] }
+
 [features]
 default = ["update-informer"]
 update-informer = ["dep:update-informer"]
@@ -42,3 +45,9 @@ panic = "abort"
 lto = "thin"
 codegen-units = 1
 opt-level = 3
+
+[profile.dev.package.insta]
+opt-level = 3
+
+[profile.dev.package.similar]
+opt-level = 3
--- a/README.md
+++ b/README.md
@@ -1,7 +1,9 @@
 # ruff

+[![image](https://img.shields.io/pypi/v/ruff.svg)](https://pypi.python.org/pypi/ruff)
+[![image](https://img.shields.io/pypi/l/ruff.svg)](https://pypi.python.org/pypi/ruff)
+[![image](https://img.shields.io/pypi/pyversions/ruff.svg)](https://pypi.python.org/pypi/ruff)
 [![Actions status](https://github.com/charliermarsh/ruff/workflows/CI/badge.svg)](https://github.com/charliermarsh/ruff/actions)
-[![PyPI version](https://badge.fury.io/py/ruff.svg)](https://badge.fury.io/py/ruff)

 An extremely fast Python linter, written in Rust.

@@ -18,11 +20,9 @@ An extremely fast Python linter, written in Rust.
 - 🤝 Python 3.10 compatibility
 - 🛠️ `pyproject.toml` support
 - 📦 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#caching)-inspired cache support
- 🔧 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#caching)-inspired `--fix` support
+- 🔧 [ESLint](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix)-inspired `--fix` support
 - 👀 [TypeScript](https://www.typescriptlang.org/docs/handbook/configuring-watch.html)-inspired `--watch` support
-
-_ruff is a proof-of-concept and not yet intended for production use. It supports only a small subset
-of the Flake8 rules, and may crash on your codebase._
+- ⚖️ [Near-complete parity](#Parity-with-Flake8) with the built-in Flake8 rule set

 Read the [launch blog post](https://notes.crmarsh.com/python-tooling-could-be-much-much-faster).

@@ -52,14 +52,14 @@ You can run ruff in `--watch` mode to automatically re-run on-change:
 ruff path/to/code/ --watch
 ```

-ruff also works with [Pre-Commit](https://pre-commit.com) (requires Cargo on system):
+ruff also works with [pre-commit](https://pre-commit.com):

 ```yaml
 repos:
- repo: https://github.com/charliermarsh/ruff
-  rev: v0.0.33
-  hooks:
-    - id: lint
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.0.40
+    hooks:
+      - id: lint
 ```

 ## Configuration
@@ -80,92 +80,180 @@ select = [
 Alternatively, on the command-line:

 ```shell
-ruff path/to/code/ --select F401 F403
+ruff path/to/code/ --select F401 --select F403
 ```

 See `ruff --help` for more:

 ```shell
-ruff (v0.0.33)
-An extremely fast Python linter.
+ruff: An extremely fast Python linter.

-USAGE:
-    ruff [OPTIONS] <FILES>...
+Usage: ruff [OPTIONS] <FILES>...

-ARGS:
-    <FILES>...
+Arguments:
+  <FILES>...

-OPTIONS:
-    -e, --exit-zero               Exit with status code "0", even upon detecting errors
-        --exclude <EXCLUDE>...    List of file and/or directory patterns to exclude from checks
-    -f, --fix                     Attempt to automatically fix lint errors
-    -h, --help                    Print help information
-        --ignore <IGNORE>...      List of error codes to ignore
-    -n, --no-cache                Disable cache reads
-    -q, --quiet                   Disable all logging (but still exit with status code "1" upon
-                                  detecting errors)
-        --select <SELECT>...      List of error codes to enable
-    -v, --verbose                 Enable verbose logging
-    -w, --watch                   Run in watch mode by re-running whenever files change
+Options:
+  -v, --verbose
+          Enable verbose logging
+  -q, --quiet
+          Disable all logging (but still exit with status code "1" upon detecting errors)
+  -e, --exit-zero
+          Exit with status code "0", even upon detecting errors
+  -w, --watch
+          Run in watch mode by re-running whenever files change
+  -f, --fix
+          Attempt to automatically fix lint errors
+  -n, --no-cache
+          Disable cache reads
+      --select <SELECT>
+          List of error codes to enable
+      --extend-select <EXTEND_SELECT>
+          Like --select, but adds additional error codes on top of the selected ones
+      --ignore <IGNORE>
+          List of error codes to ignore
+      --extend-ignore <EXTEND_IGNORE>
+          Like --ignore, but adds additional error codes on top of the ignored ones
+      --exclude <EXCLUDE>
+          List of paths, used to exclude files and/or directories from checks
+      --extend-exclude <EXTEND_EXCLUDE>
+          Like --exclude, but adds additional files and directories on top of the excluded ones
+      --per-file-ignores <PER_FILE_IGNORES>
+          List of mappings from file pattern to code to exclude
+      --format <FORMAT>
+          Output serialization format for error messages [default: text] [possible values: text, json]
+      --show-files
+          See the files ruff will be run against with the current settings
+      --show-settings
+          See ruff's settings
+      --add-noqa
+          Enable automatic additions of noqa directives to failing lines
+      --dummy-variable-rgx <DUMMY_VARIABLE_RGX>
+          Regular expression matching the name of dummy variables
+  -h, --help
+          Print help information
+  -V, --version
+          Print version information
 ```

+### Excluding files
+
+Exclusions are based on globs, and can be either:
+
+- Single-path patterns, like `.mypy_cache` (to exclude any directory named `.mypy_cache` in the
+  tree), `foo.py` (to exclude any file named `foo.py`), or `foo_*.py` (to exclude any file matching
+  `foo_*.py` ).
+- Relative patterns, like `directory/foo.py` (to exclude that specific file) or `directory/*.py`
+  (to exclude any Python files in `directory`). Note that these paths are relative to the
+  project root (e.g., the directory containing your `pyproject.toml`).
+
+### Ignoring errors
+
+To omit a lint check entirely, add it to the "ignore" list via `--ignore` or `--extend-ignore`,
+either  on the command-line or in your `project.toml` file.
+
+To ignore an error in-line, ruff uses a `noqa` system similar to [Flake8](https://flake8.pycqa.org/en/3.1.1/user/ignoring-errors.html).
+To ignore an individual error, add `# noqa: {code}` to the end of the line, like so:
+
+```python
+# Ignore F841.
+x = 1  # noqa: F841
+
+# Ignore E741 and F841.
+i = 1  # noqa: E741, F841
+
+# Ignore _all_ errors.
+x = 1  # noqa
+```
+
+Note that, for multi-line strings, the `noqa` directive should come at the end of the string, and
+will apply to the entire body, like so:
+
+```python
+"""Lorem ipsum dolor sit amet.
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+"""  # noqa: E501
+```
+
+ruff supports several (experimental) workflows to aid in `noqa` management.
+
+First, ruff provides a special error code, `M001`, to enforce that your `noqa` directives are
+"valid", in that the errors they _say_ they ignore are actually being triggered on that line (and
+thus suppressed). **You can run `ruff /path/to/file.py --extend-select M001` to flag unused `noqa`
+directives.**
+
+Second, ruff can _automatically remove_ unused `noqa` directives via its autofix functionality.
+**You can run `ruff /path/to/file.py --extend-select M001 --fix` to automatically remove unused
+`noqa` directives.**
+
+Third, ruff can _automatically add_ `noqa` directives to all failing lines. This is useful when
+migrating a new codebase to ruff. **You can run `ruff /path/to/file.py --add-noqa` to automatically
+add `noqa` directives to all failing lines, with the appropriate error codes.**
+
 ### Compatibility with Black

-ruff is intended to be compatible with [Black](https://github.com/psf/black), and should be
-compatible out-of-the-box as long as the `line-length` setting is consistent between the two.
+ruff is compatible with [Black](https://github.com/psf/black) out-of-the-box, as long as
+the `line-length` setting is consistent between the two.

 As a project, ruff is designed to be used alongside Black and, as such, will defer implementing
-lint rules that are obviated by Black (e.g., stylistic rules).
+stylistic lint rules that are obviated by autoformatting.

 ### Parity with Flake8

-ruff's goal is to achieve feature-parity with Flake8 when used (1) without any plugins,
-(2) alongside Black, and (3) on Python 3 code. (Using Black obviates the need for many of Flake8's
-stylistic checks; limiting to Python 3 obviates the need for certain compatibility checks.)
+ruff's goal is to achieve feature-parity with Flake8 when used (1) without plugins, (2) alongside
+Black, and (3) on Python 3 code.

-Under those conditions, Flake8 implements about 58 rules, give or take. At time of writing, ruff
-implements 28 rules. (Note that these 28 rules likely cover a disproportionate share of errors:
-unused imports, undefined variables, etc.)
-
-Of the unimplemented rules, ruff is missing:
-
- 15 rules related to string `.format` calls.
- 6 rules related to misplaced `yield`, `break`, and `return` statements.
- 3 rules related to syntax errors in doctests and annotations.
- 2 rules related to redefining unused names.
-
-...along with a variety of others that don't fit neatly into any specific category.
+**Under those conditions, ruff implements 44 out of 60 rules.** (ruff is missing: 14 rules related
+to string `.format` calls, 1 rule related to docstring parsing, and 1 rule related to redefined
+variables.)

 Beyond rule-set parity, ruff suffers from the following limitations vis-à-vis Flake8:

-1. Flake8 supports a wider range of `noqa` patterns, such as per-file ignores defined in `.flake8`.
-2. Flake8 has a plugin architecture and supports writing custom lint rules.
-3. ruff does not yet support parenthesized context managers.
+1. Flake8 has a plugin architecture and supports writing custom lint rules.
+2. ruff does not yet support a few Python 3.9 and 3.10 language features, including structural
+   pattern matching and parenthesized context managers.

 ## Rules

 | Code | Name | Message |
 | ---- | ----- | ------- |
 | E402 | ModuleImportNotAtTopOfFile | Module level import not at top of file |
-| E501 | LineTooLong | Line too long |
+| E501 | LineTooLong | Line too long (89 > 88 characters) |
 | E711 | NoneComparison | Comparison to `None` should be `cond is None` |
 | E712 | TrueFalseComparison | Comparison to `True` should be `cond is True` |
 | E713 | NotInTest | Test for membership should be `not in` |
 | E714 | NotIsTest | Test for object identity should be `is not` |
+| E721 | TypeComparison | do not compare types, use `isinstance()` |
+| E722 | DoNotUseBareExcept | Do not use bare `except` |
 | E731 | DoNotAssignLambda | Do not assign a lambda expression, use a def |
-| E902 | IOError | No such file or directory: `...` |
+| E741 | AmbiguousVariableName | ambiguous variable name '...' |
+| E742 | AmbiguousClassName | ambiguous class name '...' |
+| E743 | AmbiguousFunctionName | ambiguous function name '...' |
+| E902 | IOError | ... |
+| E999 | SyntaxError | SyntaxError: ... |
 | F401 | UnusedImport | `...` imported but unused |
-| F403 | ImportStarUsage | Unable to detect undefined names |
+| F402 | ImportShadowedByLoopVar | import '...' from line 1 shadowed by loop variable |
+| F403 | ImportStarUsed | `from ... import *` used; unable to detect undefined names |
+| F404 | LateFutureImport | from __future__ imports must occur at the beginning of the file |
+| F405 | ImportStarUsage | '...' may be undefined, or defined from star imports: ... |
+| F406 | ImportStarNotPermitted | `from ... import *` only allowed at module level |
+| F407 | FutureFeatureNotDefined | future feature '...' is not defined |
 | F541 | FStringMissingPlaceholders | f-string without any placeholders |
 | F601 | MultiValueRepeatedKeyLiteral | Dictionary key literal repeated |
 | F602 | MultiValueRepeatedKeyVariable | Dictionary key `...` repeated |
 | F621 | TooManyExpressionsInStarredAssignment | too many expressions in star-unpacking assignment |
 | F622 | TwoStarredExpressions | two starred expressions in assignment |
 | F631 | AssertTuple | Assert test is a non-empty tuple, which is always `True` |
+| F632 | IsLiteral | use ==/!= to compare constant literals |
+| F633 | InvalidPrintSyntax | use of >> is invalid with print function |
 | F634 | IfTuple | If test is a tuple, which is always `True` |
+| F701 | BreakOutsideLoop | `break` outside loop |
+| F702 | ContinueOutsideLoop | `continue` not properly in loop |
 | F704 | YieldOutsideFunction | a `yield` or `yield from` statement outside of a function/method |
 | F706 | ReturnOutsideFunction | a `return` statement outside of a function/method |
 | F707 | DefaultExceptNotLast | an `except:` block as not the last exception handler |
+| F722 | ForwardAnnotationSyntaxError | syntax error in forward annotation '...' |
 | F821 | UndefinedName | Undefined name `...` |
 | F822 | UndefinedExport | Undefined name `...` in `__all__` |
 | F823 | UndefinedLocal | Local variable `...` referenced before assignment |
@@ -174,6 +262,7 @@ Beyond rule-set parity, ruff suffers from the following limitations vis-à-vis F
 | F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` |
 | R001 | UselessObjectInheritance | Class `...` inherits from object |
 | R002 | NoAssertEquals | `assertEquals` is deprecated, use `assertEqual` instead |
+| M001 | UnusedNOQA | Unused `noqa` directive |

 ## Development

@@ -209,7 +298,7 @@ Add this `pyproject.toml` to the CPython directory:
 ```toml
 [tool.ruff]
 line-length = 88
-exclude = [
+extend-exclude = [
    "Lib/lib2to3/tests/data/bom.py",
    "Lib/lib2to3/tests/data/crlf.py",
    "Lib/lib2to3/tests/data/different_encoding.py",
@@ -240,17 +329,21 @@ Next, to benchmark the release build:
 ```shell
 cargo build --release

-hyperfine --ignore-failure --warmup 1 \
+hyperfine --ignore-failure --warmup 10 --runs 100 \
  "./target/release/ruff ./resources/test/cpython/ --no-cache" \
  "./target/release/ruff ./resources/test/cpython/"

 Benchmark 1: ./target/release/ruff ./resources/test/cpython/ --no-cache
-  Time (mean ± σ):     353.6 ms ±   7.6 ms    [User: 2868.8 ms, System: 171.5 ms]
-  Range (min … max):   344.4 ms … 367.3 ms    10 runs
+  Time (mean ± σ):     297.4 ms ±   4.9 ms    [User: 2460.0 ms, System: 67.2 ms]
+  Range (min … max):   287.7 ms … 312.1 ms    100 runs
+
+  Warning: Ignoring non-zero exit code.

 Benchmark 2: ./target/release/ruff ./resources/test/cpython/
-  Time (mean ± σ):      59.6 ms ±   2.5 ms    [User: 36.4 ms, System: 345.6 ms]
-  Range (min … max):    55.9 ms …  67.0 ms    48 runs
+  Time (mean ± σ):      79.6 ms ±   7.3 ms    [User: 59.7 ms, System: 356.1 ms]
+  Range (min … max):    62.4 ms … 111.2 ms    100 runs
+
+  Warning: Ignoring non-zero exit code.
 ```

 To benchmark against the ecosystem's existing tools:
@@ -262,11 +355,8 @@ hyperfine --ignore-failure --warmup 5 \
  "pyflakes resources/test/cpython" \
  "autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython" \
  "pycodestyle resources/test/cpython" \
-  "pycodestyle --select E501 resources/test/cpython" \
  "flake8 resources/test/cpython" \
-  "flake8 --select=F831,F541,F634,F403,F706,F901,E501 resources/test/cpython" \
-  "python -m scripts.run_flake8 resources/test/cpython" \
-  "python -m scripts.run_flake8 resources/test/cpython --select=F831,F541,F634,F403,F706,F901,E501"
+  "python -m scripts.run_flake8 resources/test/cpython"
 ```

 In order, these evaluate:
@@ -276,66 +366,58 @@ In order, these evaluate:
 - PyFlakes
 - autoflake
 - pycodestyle
- pycodestyle, limited to the checks supported by ruff
 - Flake8
- Flake8, limited to the checks supported by ruff
 - Flake8, with a hack to enable multiprocessing on macOS
- Flake8, with a hack to enable multiprocessing on macOS, limited to the checks supported by ruff

 (You can `poetry install` from `./scripts` to create a working environment for the above.)

 ```shell
 Benchmark 1: ./target/release/ruff ./resources/test/cpython/ --no-cache
-  Time (mean ± σ):     469.3 ms ±  16.3 ms    [User: 2663.0 ms, System: 972.5 ms]
-  Range (min … max):   445.2 ms … 494.8 ms    10 runs
+  Time (mean ± σ):     297.9 ms ±   7.0 ms    [User: 2436.6 ms, System: 65.9 ms]
+  Range (min … max):   289.9 ms … 314.6 ms    10 runs
+
+  Warning: Ignoring non-zero exit code.

 Benchmark 2: pylint --recursive=y resources/test/cpython/
-  Time (mean ± σ):     27.211 s ±  0.097 s    [User: 26.405 s, System: 0.799 s]
-  Range (min … max):   27.056 s … 27.349 s    10 runs
+  Time (mean ± σ):     37.634 s ±  0.225 s    [User: 36.728 s, System: 0.853 s]
+  Range (min … max):   37.201 s … 38.106 s    10 runs
+
+  Warning: Ignoring non-zero exit code.

 Benchmark 3: pyflakes resources/test/cpython
-  Time (mean ± σ):     27.309 s ±  0.033 s    [User: 27.137 s, System: 0.169 s]
-  Range (min … max):   27.267 s … 27.372 s    10 runs
+  Time (mean ± σ):     40.950 s ±  0.449 s    [User: 40.688 s, System: 0.229 s]
+  Range (min … max):   40.348 s … 41.671 s    10 runs
+
+  Warning: Ignoring non-zero exit code.

 Benchmark 4: autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython
-  Time (mean ± σ):      8.027 s ±  0.024 s    [User: 74.255 s, System: 0.953 s]
-  Range (min … max):    7.969 s …  8.052 s    10 runs
+  Time (mean ± σ):     11.562 s ±  0.160 s    [User: 107.022 s, System: 1.143 s]
+  Range (min … max):   11.417 s … 11.917 s    10 runs

 Benchmark 5: pycodestyle resources/test/cpython
-  Time (mean ± σ):     41.666 s ±  0.266 s    [User: 41.531 s, System: 0.132 s]
-  Range (min … max):   41.295 s … 41.980 s    10 runs
+  Time (mean ± σ):     67.428 s ±  0.985 s    [User: 67.199 s, System: 0.203 s]
+  Range (min … max):   65.313 s … 68.496 s    10 runs

-Benchmark 6: pycodestyle --select E501 resources/test/cpython
-  Time (mean ± σ):     14.547 s ±  0.077 s    [User: 14.466 s, System: 0.079 s]
-  Range (min … max):   14.429 s … 14.695 s    10 runs
+  Warning: Ignoring non-zero exit code.

-Benchmark 7: flake8 resources/test/cpython
-  Time (mean ± σ):     75.700 s ±  0.152 s    [User: 75.254 s, System: 0.440 s]
-  Range (min … max):   75.513 s … 76.014 s    10 runs
+Benchmark 6: flake8 resources/test/cpython
+  Time (mean ± σ):     116.099 s ±  1.178 s    [User: 115.217 s, System: 0.845 s]
+  Range (min … max):   114.180 s … 117.724 s    10 runs

-Benchmark 8: flake8 --select=F831,F541,F634,F403,F706,F901,E501 resources/test/cpython
-  Time (mean ± σ):     75.122 s ±  0.532 s    [User: 74.677 s, System: 0.440 s]
-  Range (min … max):   74.130 s … 75.606 s    10 runs
+  Warning: Ignoring non-zero exit code.

-Benchmark 9: python -m scripts.run_flake8 resources/test/cpython
-  Time (mean ± σ):     12.794 s ±  0.147 s    [User: 90.792 s, System: 0.738 s]
-  Range (min … max):   12.606 s … 13.030 s    10 runs
-
-Benchmark 10: python -m scripts.run_flake8 resources/test/cpython --select=F831,F541,F634,F403,F706,F901,E501
-  Time (mean ± σ):     12.487 s ±  0.118 s    [User: 90.052 s, System: 0.714 s]
-  Range (min … max):   12.265 s … 12.665 s    10 runs
+Benchmark 7: python -m scripts.run_flake8 resources/test/cpython
+  Time (mean ± σ):     20.477 s ±  0.349 s    [User: 142.372 s, System: 1.504 s]
+  Range (min … max):   20.107 s … 21.183 s    10 runs

 Summary
  './target/release/ruff ./resources/test/cpython/ --no-cache' ran
-   17.10 ± 0.60 times faster than 'autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython'
-   26.60 ± 0.96 times faster than 'python -m scripts.run_flake8 resources/test/cpython --select=F831,F541,F634,F403,F706,F901,E501'
-   27.26 ± 1.00 times faster than 'python -m scripts.run_flake8 resources/test/cpython'
-   30.99 ± 1.09 times faster than 'pycodestyle --select E501 resources/test/cpython'
-   57.98 ± 2.03 times faster than 'pylint --recursive=y resources/test/cpython/'
-   58.19 ± 2.02 times faster than 'pyflakes resources/test/cpython'
-   88.77 ± 3.14 times faster than 'pycodestyle resources/test/cpython'
-  160.06 ± 5.68 times faster than 'flake8 --select=F831,F541,F634,F403,F706,F901,E501 resources/test/cpython'
-  161.29 ± 5.61 times faster than 'flake8 resources/test/cpython'
+   38.81 ± 1.05 times faster than 'autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython'
+   68.74 ± 1.99 times faster than 'python -m scripts.run_flake8 resources/test/cpython'
+  126.33 ± 3.05 times faster than 'pylint --recursive=y resources/test/cpython/'
+  137.46 ± 3.55 times faster than 'pyflakes resources/test/cpython'
+  226.35 ± 6.23 times faster than 'pycodestyle resources/test/cpython'
+  389.73 ± 9.92 times faster than 'flake8 resources/test/cpython'
 ```

 ## License
--- a/examples/generate_rules_table.rs
+++ b/examples/generate_rules_table.rs
@@ -1,42 +1,14 @@
 /// Generate a Markdown-compatible table of supported lint rules.
-use ruff::checks::{CheckKind, RejectedCmpop};
+use ruff::checks::{CheckCode, ALL_CHECK_CODES};

 fn main() {
-    let mut check_kinds: Vec<CheckKind> = vec![
-        CheckKind::AssertTuple,
-        CheckKind::DefaultExceptNotLast,
-        CheckKind::DoNotAssignLambda,
-        CheckKind::DuplicateArgumentName,
-        CheckKind::FStringMissingPlaceholders,
-        CheckKind::IOError("...".to_string()),
-        CheckKind::IfTuple,
-        CheckKind::ImportStarUsage,
-        CheckKind::LineTooLong,
-        CheckKind::ModuleImportNotAtTopOfFile,
-        CheckKind::MultiValueRepeatedKeyLiteral,
-        CheckKind::MultiValueRepeatedKeyVariable("...".to_string()),
-        CheckKind::NoAssertEquals,
-        CheckKind::NoneComparison(RejectedCmpop::Eq),
-        CheckKind::NotInTest,
-        CheckKind::NotIsTest,
-        CheckKind::RaiseNotImplemented,
-        CheckKind::ReturnOutsideFunction,
-        CheckKind::TooManyExpressionsInStarredAssignment,
-        CheckKind::TrueFalseComparison(true, RejectedCmpop::Eq),
-        CheckKind::TwoStarredExpressions,
-        CheckKind::UndefinedExport("...".to_string()),
-        CheckKind::UndefinedLocal("...".to_string()),
-        CheckKind::UndefinedName("...".to_string()),
-        CheckKind::UnusedImport("...".to_string()),
-        CheckKind::UnusedVariable("...".to_string()),
-        CheckKind::UselessObjectInheritance("...".to_string()),
-        CheckKind::YieldOutsideFunction,
-    ];
-    check_kinds.sort_by_key(|check_kind| check_kind.code());
+    let mut check_codes: Vec<CheckCode> = ALL_CHECK_CODES.to_vec();
+    check_codes.sort();

    println!("| Code | Name | Message |");
    println!("| ---- | ----- | ------- |");
-    for check_kind in check_kinds {
+    for check_code in check_codes {
+        let check_kind = check_code.kind();
        println!(
            "| {} | {} | {} |",
            check_kind.code().as_str(),
--- a/examples/print_ast.rs
+++ b/examples/print_ast.rs
@@ -2,14 +2,14 @@
 use std::path::PathBuf;

 use anyhow::Result;
-use clap::{Parser, ValueHint};
+use clap::Parser;
 use rustpython_parser::parser;

 use ruff::fs;

 #[derive(Debug, Parser)]
 struct Cli {
-    #[clap(parse(from_os_str), value_hint = ValueHint::FilePath, required = true)]
+    #[arg(required = true)]
    file: PathBuf,
 }

--- a/examples/print_tokens.rs
+++ b/examples/print_tokens.rs
@@ -2,14 +2,14 @@
 use std::path::PathBuf;

 use anyhow::Result;
-use clap::{Parser, ValueHint};
+use clap::Parser;
 use rustpython_parser::lexer;

 use ruff::fs;

 #[derive(Debug, Parser)]
 struct Cli {
-    #[clap(parse(from_os_str), value_hint = ValueHint::FilePath, required = true)]
+    #[arg(required = true)]
    file: PathBuf,
 }

--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,6 @@ classifiers = [
    "License :: OSI Approved :: MIT License",
    "Operating System :: OS Independent",
    "Programming Language :: Python",
-    "Programming Language :: Python :: 3.6",
    "Programming Language :: Python :: 3.7",
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
@@ -19,10 +18,12 @@ classifiers = [
 ]
 author = "Charlie Marsh"
 author_email = "charlie.r.marsh@gmail.com"
-url = "https://github.com/charliermarsh/ruff"
 description = "An extremely fast Python linter, written in Rust."
 requires-python = ">=3.7"

+[project.urls]
+repository = "https://github.com/charliermarsh/ruff"
+
 [build-system]
 requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
--- a/resources/test/fixtures/A001.py
+++ b/resources/test/fixtures/A001.py
@@ -0,0 +1,27 @@
+import some as sum
+from some import other as int
+
+print = 1
+copyright: 'annotation' = 2
+(complex := 3)
+float = object = 4
+min, max = 5, 6
+
+def bytes():
+    pass
+
+class slice:
+    pass
+
+try:
+    ...
+except ImportError as ValueError:
+    ...
+
+for memoryview, *bytearray in []:
+    pass
+
+with open('file') as str, open('file2') as (all, any):
+    pass
+
+[0 for sum in ()]
--- a/resources/test/fixtures/A002.py
+++ b/resources/test/fixtures/A002.py
@@ -0,0 +1,9 @@
+def func1(str, /, type, *complex, Exception, **getattr):
+    pass
+
+
+async def func2(bytes):
+    pass
+
+
+map([], lambda float: ...)
--- a/resources/test/fixtures/A003.py
+++ b/resources/test/fixtures/A003.py
@@ -0,0 +1,8 @@
+class MyClass:
+    ImportError = 4
+
+    def __init__(self):
+        self.float = 5  # is fine
+
+    def str(self):
+        pass
--- a/resources/test/fixtures/E501.py
+++ b/resources/test/fixtures/E501.py
@@ -4,3 +4,13 @@

 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
 """
+
+_ = """Lorem ipsum dolor sit amet.
+
+    https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+"""  # noqa: E501
+
+_ = "---------------------------------------------------------------------------AAAAAAA"
+_ = "---------------------------------------------------------------------------亜亜亜亜亜亜亜"
--- a/resources/test/fixtures/E711.py
+++ b/resources/test/fixtures/E711.py
@@ -1,11 +1,50 @@
-if var == None:
+#: E711
+if res == None:
+    pass
+#: E711
+if res != None:
+    pass
+#: E711
+if None == res:
+    pass
+#: E711
+if None != res:
+    pass
+#: E711
+if res[1] == None:
+    pass
+#: E711
+if res[1] != None:
+    pass
+#: E711
+if None != res[1]:
+    pass
+#: E711
+if None == res[1]:
    pass

-if None != var:
+#: Okay
+if x not in y:
    pass

-if var is None:
+if not (X in Y or X is Z):
    pass

-if None is not var:
+if not (X in Y):
    pass
+
+if x is not y:
+    pass
+
+if X is not Y is not Z:
+    pass
+
+if TrueElement.get_element(True) == TrueElement.get_element(False):
+    pass
+
+if (True) == TrueElement or x == TrueElement:
+    pass
+
+assert (not foo) in bar
+assert {"x": not foo} in bar
+assert [42, not foo] in bar
--- a/resources/test/fixtures/E712.py
+++ b/resources/test/fixtures/E712.py
@@ -1,14 +1,46 @@
-if var == True:
+#: E712
+if res == True:
+    pass
+#: E712
+if res != False:
+    pass
+#: E712
+if True != res:
+    pass
+#: E712
+if False == res:
+    pass
+#: E712
+if res[1] == True:
+    pass
+#: E712
+if res[1] != False:
+    pass
+#: E712
+var = 1 if cond == True else -1 if cond == False else cond
+#: E712
+if (True) == TrueElement or x == TrueElement:
    pass

-if False != var:
+#: Okay
+if x not in y:
    pass

-if var != False != True:
+if not (X in Y or X is Z):
    pass

-if var is True:
+if not (X in Y):
    pass

-if False is not var:
+if x is not y:
    pass
+
+if X is not Y is not Z:
+    pass
+
+if TrueElement.get_element(True) == TrueElement.get_element(False):
+    pass
+
+assert (not foo) in bar
+assert {"x": not foo} in bar
+assert [42, not foo] in bar
--- a/resources/test/fixtures/E713.py
+++ b/resources/test/fixtures/E713.py
@@ -1,7 +1,38 @@
-my_list = [1, 2, 3]
-if not num in my_list:
-    print(num)
+#: E713
+if not X in Y:
+    pass
+#: E713
+if not X.B in Y:
+    pass
+#: E713
+if not X in Y and Z == "zero":
+    pass
+#: E713
+if X == "zero" or not Y in Z:
+    pass
+#: E713
+if not (X in Y):
+    pass

-my_list = [1, 2, 3]
-if num not in my_list:
-    print(num)
+#: Okay
+if x not in y:
+    pass
+
+if not (X in Y or X is Z):
+    pass
+
+if x is not y:
+    pass
+
+if X is not Y is not Z:
+    pass
+
+if TrueElement.get_element(True) == TrueElement.get_element(False):
+    pass
+
+if (True) == TrueElement or x == TrueElement:
+    pass
+
+assert (not foo) in bar
+assert {"x": not foo} in bar
+assert [42, not foo] in bar
--- a/resources/test/fixtures/E714.py
+++ b/resources/test/fixtures/E714.py
@@ -1,5 +1,38 @@
-if not user is None:
-    print(user.name)
+#: E714
+if not X is Y:
+    pass
+#: E714
+if not X.B is Y:
+    pass
+#: E714
+if not X is Y is not Z:
+    pass

-if user is not None:
-    print(user.name)
+#: Okay
+if not X is not Y:
+    pass
+
+if x not in y:
+    pass
+
+if not (X in Y or X is Z):
+    pass
+
+if not (X in Y):
+    pass
+
+if x is not y:
+    pass
+
+if X is not Y is not Z:
+    pass
+
+if TrueElement.get_element(True) == TrueElement.get_element(False):
+    pass
+
+if (True) == TrueElement or x == TrueElement:
+    pass
+
+assert (not foo) in bar
+assert {"x": not foo} in bar
+assert [42, not foo] in bar
--- a/resources/test/fixtures/E721.py
+++ b/resources/test/fixtures/E721.py
@@ -0,0 +1,54 @@
+#: E721
+if type(res) == type(42):
+    pass
+#: E721
+if type(res) != type(""):
+    pass
+#: E721
+import types
+
+if res == types.IntType:
+    pass
+#: E721
+import types
+
+if type(res) is not types.ListType:
+    pass
+#: E721
+assert type(res) == type(False) or type(res) == type(None)
+#: E721
+assert type(res) == type([])
+#: E721
+assert type(res) == type(())
+#: E721
+assert type(res) == type((0,))
+#: E721
+assert type(res) == type((0))
+#: E721
+assert type(res) != type((1,))
+#: E721
+assert type(res) is type((1,))
+#: E721
+assert type(res) is not type((1,))
+#: E211 E721
+assert type(res) == type(
+    [
+        2,
+    ]
+)
+#: E201 E201 E202 E721
+assert type(res) == type(())
+#: E201 E202 E721
+assert type(res) == type((0,))
+
+#: Okay
+import types
+
+if isinstance(res, int):
+    pass
+if isinstance(res, str):
+    pass
+if isinstance(res, types.MethodType):
+    pass
+if type(a) != type(b) or type(a) == type(ccc):
+    pass
--- a/resources/test/fixtures/E722.py
+++ b/resources/test/fixtures/E722.py
@@ -0,0 +1,33 @@
+#: E722
+try:
+    pass
+except:
+    pass
+#: E722
+try:
+    pass
+except Exception:
+    pass
+except:
+    pass
+#: E722
+try:
+    pass
+except:
+    pass
+#: Okay
+fake_code = """"
+try:
+    do_something()
+except:
+    pass
+"""
+try:
+    pass
+except Exception:
+    pass
+#: Okay
+from . import compute_type
+
+if compute_type(foo) == 5:
+    pass
--- a/resources/test/fixtures/E731.py
+++ b/resources/test/fixtures/E731.py
@@ -1,6 +1,21 @@
-from typing import Callable, Iterable
+#: E731
+f = lambda x: 2 * x
+#: E731
+f = lambda x: 2 * x
+#: E731
+while False:
+    this = lambda y, z: 2 * x

-a = lambda x: x**2
-b = map(lambda x: 2 * x, range(3))
-c: Callable = lambda x: x**2
-d: Iterable = map(lambda x: 2 * x, range(3))
+
+f = object()
+#: E731
+f.method = lambda: "Method"
+
+f = {}
+#: E731
+f["a"] = lambda x: x ** 2
+
+f = []
+f.append(lambda x: x ** 2)
+
+lambda: "no-op"
--- a/resources/test/fixtures/E741.py
+++ b/resources/test/fixtures/E741.py
@@ -0,0 +1,75 @@
+from contextlib import contextmanager
+
+l = 0
+I = 0
+O = 0
+l: int = 0
+
+a, l = 0, 1
+[a, l] = 0, 1
+a, *l = 0, 1, 2
+a = l = 0
+
+o = 0
+i = 0
+
+for l in range(3):
+    pass
+
+
+for a, l in zip(range(3), range(3)):
+    pass
+
+
+def f1():
+    global l
+    l = 0
+
+
+def f2():
+    l = 0
+
+    def f3():
+        nonlocal l
+        l = 1
+
+    f3()
+    return l
+
+
+def f4(l, /, I):
+    return l, I, O
+
+
+def f5(l=0, *, I=1):
+    return l, I
+
+
+def f6(*l, **I):
+    return l, I
+
+
+@contextmanager
+def ctx1():
+    yield 0
+
+
+with ctx1() as l:
+    pass
+
+
+@contextmanager
+def ctx2():
+    yield 0, 1
+
+
+with ctx2() as (a, l):
+    pass
+
+try:
+    pass
+except ValueError as l:
+    pass
+
+if (l := 5) > 0:
+    pass
--- a/resources/test/fixtures/E742.py
+++ b/resources/test/fixtures/E742.py
@@ -0,0 +1,14 @@
+class l:
+    pass
+
+
+class I:
+    pass
+
+
+class O:
+    pass
+
+
+class X:
+    pass
--- a/resources/test/fixtures/E743.py
+++ b/resources/test/fixtures/E743.py
@@ -0,0 +1,15 @@
+def l():
+    pass
+
+
+def I():
+    pass
+
+
+class X:
+    def O(self):
+        pass
+
+
+def x():
+    pass
--- a/resources/test/fixtures/E999.py
+++ b/resources/test/fixtures/E999.py
@@ -0,0 +1,2 @@
+def x():
+
--- a/resources/test/fixtures/F402.py
+++ b/resources/test/fixtures/F402.py
@@ -0,0 +1,9 @@
+import os
+import os.path as path
+
+
+for os in range(3):
+    pass
+
+for path in range(3):
+    pass
--- a/resources/test/fixtures/F404.py
+++ b/resources/test/fixtures/F404.py
@@ -0,0 +1,7 @@
+from __future__ import print_function
+"""Docstring"""
+from __future__ import absolute_import
+
+from collections import namedtuple
+
+from __future__ import print_function
--- a/resources/test/fixtures/F405.py
+++ b/resources/test/fixtures/F405.py
@@ -0,0 +1,11 @@
+from mymodule import *
+
+
+def print_name():
+    print(name)
+
+
+def print_name(name):
+    print(name)
+
+__all__ = ['a']
--- a/resources/test/fixtures/F406.py
+++ b/resources/test/fixtures/F406.py
@@ -0,0 +1,9 @@
+from F634 import *
+
+
+def f():
+    from F634 import *
+
+
+class F:
+    from F634 import *
--- a/resources/test/fixtures/F407.py
+++ b/resources/test/fixtures/F407.py
@@ -0,0 +1,2 @@
+from __future__ import print_function
+from __future__ import non_existent_feature
--- a/resources/test/fixtures/F632.py
+++ b/resources/test/fixtures/F632.py
@@ -0,0 +1,5 @@
+if x is "abc":
+    pass
+
+if 123 is not y:
+    pass
--- a/resources/test/fixtures/F633.py
+++ b/resources/test/fixtures/F633.py
@@ -0,0 +1,4 @@
+from __future__ import print_function
+import sys
+
+print >> sys.stderr, "Hello"
--- a/resources/test/fixtures/F701.py
+++ b/resources/test/fixtures/F701.py
@@ -0,0 +1,23 @@
+for i in range(10):
+    break
+else:
+    break
+
+i = 0
+while i < 10:
+    i += 1
+    break
+
+
+def f():
+    for i in range(10):
+        break
+
+    break
+
+
+class Foo:
+    break
+
+
+break
--- a/resources/test/fixtures/F702.py
+++ b/resources/test/fixtures/F702.py
@@ -0,0 +1,23 @@
+for i in range(10):
+    continue
+else:
+    continue
+
+i = 0
+while i < 10:
+    i += 1
+    continue
+
+
+def f():
+    for i in range(10):
+        continue
+
+    continue
+
+
+class Foo:
+    continue
+
+
+continue
--- a/resources/test/fixtures/F722.py
+++ b/resources/test/fixtures/F722.py
@@ -0,0 +1,10 @@
+class A:
+    pass
+
+
+def f() -> "A":
+    pass
+
+
+def g() -> "///":
+    pass
--- a/resources/test/fixtures/F821.py
+++ b/resources/test/fixtures/F821.py
@@ -77,3 +77,15 @@ class Ticket:

    def set_status(self, status: Status):
        self.status = status
+
+
+def update_tomato():
+    print(TOMATO)
+    TOMATO = "cherry tomato"
+
+
+A = f'{B}'
+A = (
+    f'B'
+    f'{B}'
+)
--- a/resources/test/fixtures/F841.py
+++ b/resources/test/fixtures/F841.py
@@ -10,7 +10,28 @@ except ValueError as e:
    print(e)


-def f():
+def f1():
    x = 1
    y = 2
    z = x + y
+
+
+def f2():
+    foo = (1, 2)
+    (a, b) = (1, 2)
+
+    bar = (1, 2)
+    (c, d) = bar
+
+    (x, y) = baz = bar
+
+
+def f3():
+    locals()
+    x = 1
+
+
+def f4():
+    _ = 1
+    __ = 1
+    _discarded = 1
--- a/resources/test/fixtures/M001.py
+++ b/resources/test/fixtures/M001.py
@@ -0,0 +1,57 @@
+def f() -> None:
+    # Valid
+    a = 1  # noqa
+
+    # Valid
+    b = 2  # noqa: F841
+
+    # Invalid
+    c = 1  # noqa
+    print(c)
+
+    # Invalid
+    d = 1  # noqa: E501
+
+    # Invalid
+    d = 1  # noqa: F841, E501
+
+
+# Valid
+_ = """Lorem ipsum dolor sit amet.
+
+    https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+"""  # noqa: E501
+
+# Valid
+_ = """Lorem ipsum dolor sit amet.
+
+    https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+"""  # noqa
+
+# Invalid
+_ = """Lorem ipsum dolor sit amet.
+
+    https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+"""  # noqa: E501, F841
+
+# Invalid
+_ = """Lorem ipsum dolor sit amet.
+
+    https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor.
+"""  # noqa: E501
+
+# Invalid
+_ = """Lorem ipsum dolor sit amet.
+
+    https://github.com/PyCQA/pycodestyle/pull/258/files#diff-841c622497a8033d10152bfdfb15b20b92437ecdea21a260944ea86b77b51533
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor.
+"""  # noqa
--- a/resources/test/fixtures/init.py
+++ b/resources/test/fixtures/init.py
@@ -0,0 +1,3 @@
+print(__path__)
+
+__all__ = ["a", "b", "c"]
--- a/resources/test/fixtures/directory/also_excluded.py
+++ b/resources/test/fixtures/directory/also_excluded.py
@@ -0,0 +1,9 @@
+a = "abc"
+b = f"ghi{'jkl'}"
+
+c = f"def"
+d = f"def" + "ghi"
+e = (
+    f"def" +
+    "ghi"
+)
--- a/resources/test/fixtures/future_annotations.py
+++ b/resources/test/fixtures/future_annotations.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from models import Fruit, Nut
+
+
+@dataclass
+class Foo:
+    x: int
+    y: int
+
+    @classmethod
+    def a(cls) -> Foo:
+        return cls(x=0, y=0)
+
+    @classmethod
+    def b(cls) -> "Foo":
+        return cls(x=0, y=0)
+
+    @classmethod
+    def c(cls) -> Bar:
+        return cls(x=0, y=0)
+
+    @classmethod
+    def d(cls) -> Fruit:
+        return cls(x=0, y=0)
--- a/resources/test/fixtures/pyproject.toml
+++ b/resources/test/fixtures/pyproject.toml
@@ -1,33 +1,7 @@
 [tool.ruff]
 line-length = 88
-exclude = ["excluded.py", "**/migrations"]
-select = [
-    "E402",
-    "E501",
-    "E711",
-    "E712",
-    "E713",
-    "E714",
-    "E731",
-    "E902",
-    "F401",
-    "F403",
-    "F541",
-    "F601",
-    "F602",
-    "F621",
-    "F622",
-    "F631",
-    "F634",
-    "F704",
-    "F706",
-    "F707",
-    "F821",
-    "F822",
-    "F823",
-    "F831",
-    "F841",
-    "F901",
-    "R001",
-    "R002",
+extend-exclude = [
+    "excluded.py",
+    "migrations",
+    "directory/also_excluded.py",
 ]
--- a/src/ast/checks.rs
+++ b/src/ast/checks.rs
@@ -1,15 +1,17 @@
 use std::collections::BTreeSet;

 use itertools::izip;
+use regex::Regex;
 use rustpython_parser::ast::{
    Arg, Arguments, Cmpop, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprKind, Keyword,
-    Location, Stmt, Unaryop,
+    Location, Stmt, StmtKind, Unaryop,
 };

 use crate::ast::operations::SourceCodeLocator;
-use crate::ast::types::{Binding, BindingKind, Scope};
+use crate::ast::types::{Binding, BindingKind, CheckLocator, FunctionScope, Scope, ScopeKind};
 use crate::autofix::{fixer, fixes};
 use crate::checks::{Check, CheckKind, Fix, RejectedCmpop};
+use crate::python::builtins::BUILTINS;

 /// Check IfTuple compliance.
 pub fn check_if_tuple(test: &Expr, location: Location) -> Option<Check> {
@@ -37,23 +39,32 @@ pub fn check_not_tests(
    operand: &Expr,
    check_not_in: bool,
    check_not_is: bool,
+    locator: &dyn CheckLocator,
 ) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

    if matches!(op, Unaryop::Not) {
        if let ExprKind::Compare { ops, .. } = &operand.node {
-            match ops[..] {
-                [Cmpop::In] => {
-                    if check_not_in {
-                        checks.push(Check::new(CheckKind::NotInTest, operand.location));
+            for op in ops {
+                match op {
+                    Cmpop::In => {
+                        if check_not_in {
+                            checks.push(Check::new(
+                                CheckKind::NotInTest,
+                                locator.locate_check(operand.location),
+                            ));
+                        }
                    }
-                }
-                [Cmpop::Is] => {
-                    if check_not_is {
-                        checks.push(Check::new(CheckKind::NotIsTest, operand.location));
+                    Cmpop::Is => {
+                        if check_not_is {
+                            checks.push(Check::new(
+                                CheckKind::NotIsTest,
+                                locator.locate_check(operand.location),
+                            ));
+                        }
                    }
+                    _ => {}
                }
-                _ => {}
            }
        }
    }
@@ -62,21 +73,31 @@ pub fn check_not_tests(
 }

 /// Check UnusedVariable compliance.
-pub fn check_unused_variables(scope: &Scope) -> Vec<Check> {
+pub fn check_unused_variables(
+    scope: &Scope,
+    locator: &dyn CheckLocator,
+    dummy_variable_rgx: &Regex,
+) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

+    if matches!(
+        scope.kind,
+        ScopeKind::Function(FunctionScope { uses_locals: true })
+    ) {
+        return checks;
+    }
+
    for (name, binding) in scope.values.iter() {
-        // TODO(charlie): Ignore if using `locals`.
        if binding.used.is_none()
-            && name != "_"
+            && matches!(binding.kind, BindingKind::Assignment)
+            && !dummy_variable_rgx.is_match(name)
            && name != "__tracebackhide__"
            && name != "__traceback_info__"
            && name != "__traceback_supplement__"
-            && matches!(binding.kind, BindingKind::Assignment)
        {
            checks.push(Check::new(
                CheckKind::UnusedVariable(name.to_string()),
-                binding.location,
+                locator.locate_check(binding.location),
            ));
        }
    }
@@ -93,6 +114,46 @@ pub fn check_do_not_assign_lambda(value: &Expr, location: Location) -> Option<Ch
    }
 }

+fn is_ambiguous_name(name: &str) -> bool {
+    name == "l" || name == "I" || name == "O"
+}
+
+/// Check AmbiguousVariableName compliance.
+pub fn check_ambiguous_variable_name(name: &str, location: Location) -> Option<Check> {
+    if is_ambiguous_name(name) {
+        Some(Check::new(
+            CheckKind::AmbiguousVariableName(name.to_string()),
+            location,
+        ))
+    } else {
+        None
+    }
+}
+
+/// Check AmbiguousClassName compliance.
+pub fn check_ambiguous_class_name(name: &str, location: Location) -> Option<Check> {
+    if is_ambiguous_name(name) {
+        Some(Check::new(
+            CheckKind::AmbiguousClassName(name.to_string()),
+            location,
+        ))
+    } else {
+        None
+    }
+}
+
+/// Check AmbiguousFunctionName compliance.
+pub fn check_ambiguous_function_name(name: &str, location: Location) -> Option<Check> {
+    if is_ambiguous_name(name) {
+        Some(Check::new(
+            CheckKind::AmbiguousFunctionName(name.to_string()),
+            location,
+        ))
+    } else {
+        None
+    }
+}
+
 /// Check UselessObjectInheritance compliance.
 pub fn check_useless_object_inheritance(
    stmt: &Stmt,
@@ -116,9 +177,7 @@ pub fn check_useless_object_inheritance(
                            CheckKind::UselessObjectInheritance(name.to_string()),
                            expr.location,
                        );
-                        if matches!(autofix, fixer::Mode::Generate)
-                            || matches!(autofix, fixer::Mode::Apply)
-                        {
+                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
                            if let Some(fix) = fixes::remove_class_def_base(
                                locator,
                                &stmt.location,
@@ -214,9 +273,7 @@ pub fn check_assert_equals(expr: &Expr, autofix: &fixer::Mode) -> Option<Check>
            if let ExprKind::Name { id, .. } = &value.node {
                if id == "self" {
                    let mut check = Check::new(CheckKind::NoAssertEquals, expr.location);
-                    if matches!(autofix, fixer::Mode::Generate)
-                        || matches!(autofix, fixer::Mode::Apply)
-                    {
+                    if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
                        check.amend(Fix {
                            content: "assertEqual".to_string(),
                            start: Location::new(expr.location.row(), expr.location.column() + 1),
@@ -254,6 +311,7 @@ pub fn check_repeated_keys(
    keys: &Vec<Expr>,
    check_repeated_literals: bool,
    check_repeated_variables: bool,
+    locator: &dyn CheckLocator,
 ) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

@@ -268,15 +326,15 @@ pub fn check_repeated_keys(
                    if check_repeated_literals && v1 == v2 {
                        checks.push(Check::new(
                            CheckKind::MultiValueRepeatedKeyLiteral,
-                            k2.location,
+                            locator.locate_check(k2.location),
                        ))
                    }
                }
                (Some(DictionaryKey::Variable(v1)), Some(DictionaryKey::Variable(v2))) => {
                    if check_repeated_variables && v1 == v2 {
                        checks.push(Check::new(
-                            CheckKind::MultiValueRepeatedKeyVariable(v2.to_string()),
-                            k2.location,
+                            CheckKind::MultiValueRepeatedKeyVariable((*v2).to_string()),
+                            locator.locate_check(k2.location),
                        ))
                    }
                }
@@ -295,6 +353,7 @@ pub fn check_literal_comparisons(
    comparators: &Vec<Expr>,
    check_none_comparisons: bool,
    check_true_false_comparisons: bool,
+    locator: &dyn CheckLocator,
 ) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

@@ -314,13 +373,13 @@ pub fn check_literal_comparisons(
        if matches!(op, Cmpop::Eq) {
            checks.push(Check::new(
                CheckKind::NoneComparison(RejectedCmpop::Eq),
-                comparator.location,
+                locator.locate_check(comparator.location),
            ));
        }
        if matches!(op, Cmpop::NotEq) {
            checks.push(Check::new(
                CheckKind::NoneComparison(RejectedCmpop::NotEq),
-                comparator.location,
+                locator.locate_check(comparator.location),
            ));
        }
    }
@@ -334,13 +393,13 @@ pub fn check_literal_comparisons(
            if matches!(op, Cmpop::Eq) {
                checks.push(Check::new(
                    CheckKind::TrueFalseComparison(value, RejectedCmpop::Eq),
-                    comparator.location,
+                    locator.locate_check(comparator.location),
                ));
            }
            if matches!(op, Cmpop::NotEq) {
                checks.push(Check::new(
                    CheckKind::TrueFalseComparison(value, RejectedCmpop::NotEq),
-                    comparator.location,
+                    locator.locate_check(comparator.location),
                ));
            }
        }
@@ -360,13 +419,13 @@ pub fn check_literal_comparisons(
            if matches!(op, Cmpop::Eq) {
                checks.push(Check::new(
                    CheckKind::NoneComparison(RejectedCmpop::Eq),
-                    comparator.location,
+                    locator.locate_check(comparator.location),
                ));
            }
            if matches!(op, Cmpop::NotEq) {
                checks.push(Check::new(
                    CheckKind::NoneComparison(RejectedCmpop::NotEq),
-                    comparator.location,
+                    locator.locate_check(comparator.location),
                ));
            }
        }
@@ -380,13 +439,13 @@ pub fn check_literal_comparisons(
                if matches!(op, Cmpop::Eq) {
                    checks.push(Check::new(
                        CheckKind::TrueFalseComparison(value, RejectedCmpop::Eq),
-                        comparator.location,
+                        locator.locate_check(comparator.location),
                    ));
                }
                if matches!(op, Cmpop::NotEq) {
                    checks.push(Check::new(
                        CheckKind::TrueFalseComparison(value, RejectedCmpop::NotEq),
-                        comparator.location,
+                        locator.locate_check(comparator.location),
                    ));
                }
            }
@@ -396,12 +455,96 @@ pub fn check_literal_comparisons(
    checks
 }

+fn is_constant(expr: &Expr) -> bool {
+    match &expr.node {
+        ExprKind::Constant { .. } => true,
+        ExprKind::Tuple { elts, .. } => elts.iter().all(is_constant),
+        _ => false,
+    }
+}
+
+fn is_singleton(expr: &Expr) -> bool {
+    matches!(
+        expr.node,
+        ExprKind::Constant {
+            value: Constant::None | Constant::Bool(_) | Constant::Ellipsis,
+            ..
+        }
+    )
+}
+
+fn is_constant_non_singleton(expr: &Expr) -> bool {
+    is_constant(expr) && !is_singleton(expr)
+}
+
+/// Check IsLiteral compliance.
+pub fn check_is_literal(
+    left: &Expr,
+    ops: &Vec<Cmpop>,
+    comparators: &Vec<Expr>,
+    location: Location,
+) -> Vec<Check> {
+    let mut checks: Vec<Check> = vec![];
+
+    let mut left = left;
+    for (op, right) in izip!(ops, comparators) {
+        if matches!(op, Cmpop::Is | Cmpop::IsNot)
+            && (is_constant_non_singleton(left) || is_constant_non_singleton(right))
+        {
+            checks.push(Check::new(CheckKind::IsLiteral, location));
+        }
+        left = right;
+    }
+
+    checks
+}
+
+/// Check TypeComparison compliance.
+pub fn check_type_comparison(
+    ops: &Vec<Cmpop>,
+    comparators: &Vec<Expr>,
+    location: Location,
+) -> Vec<Check> {
+    let mut checks: Vec<Check> = vec![];
+
+    for (op, right) in izip!(ops, comparators) {
+        if matches!(op, Cmpop::Is | Cmpop::IsNot | Cmpop::Eq | Cmpop::NotEq) {
+            match &right.node {
+                ExprKind::Call { func, args, .. } => {
+                    if let ExprKind::Name { id, .. } = &func.node {
+                        // Ex) type(False)
+                        if id == "type" {
+                            if let Some(arg) = args.first() {
+                                // Allow comparison for types which are not obvious.
+                                if !matches!(arg.node, ExprKind::Name { .. }) {
+                                    checks.push(Check::new(CheckKind::TypeComparison, location));
+                                }
+                            }
+                        }
+                    }
+                }
+                ExprKind::Attribute { value, .. } => {
+                    if let ExprKind::Name { id, .. } = &value.node {
+                        // Ex) types.IntType
+                        if id == "types" {
+                            checks.push(Check::new(CheckKind::TypeComparison, location));
+                        }
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+
+    checks
+}
+
 /// Check TwoStarredExpressions and TooManyExpressionsInStarredAssignment compliance.
 pub fn check_starred_expressions(
    elts: &[Expr],
-    location: Location,
    check_too_many_expressions: bool,
    check_two_starred_expressions: bool,
+    location: Location,
 ) -> Option<Check> {
    let mut has_starred: bool = false;
    let mut starred_index: Option<usize> = None;
@@ -428,3 +571,112 @@ pub fn check_starred_expressions(

    None
 }
+
+/// Check BreakOutsideLoop compliance.
+pub fn check_break_outside_loop(
+    stmt: &Stmt,
+    parents: &[&Stmt],
+    parent_stack: &[usize],
+    locator: &dyn CheckLocator,
+) -> Option<Check> {
+    let mut allowed: bool = false;
+    let mut parent = stmt;
+    for index in parent_stack.iter().rev() {
+        let child = parent;
+        parent = parents[*index];
+        match &parent.node {
+            StmtKind::For { orelse, .. }
+            | StmtKind::AsyncFor { orelse, .. }
+            | StmtKind::While { orelse, .. } => {
+                if !orelse.contains(child) {
+                    allowed = true;
+                    break;
+                }
+            }
+
+            StmtKind::FunctionDef { .. }
+            | StmtKind::AsyncFunctionDef { .. }
+            | StmtKind::ClassDef { .. } => {
+                break;
+            }
+            _ => {}
+        }
+    }
+
+    if !allowed {
+        Some(Check::new(
+            CheckKind::BreakOutsideLoop,
+            locator.locate_check(stmt.location),
+        ))
+    } else {
+        None
+    }
+}
+
+/// Check ContinueOutsideLoop compliance.
+pub fn check_continue_outside_loop(
+    stmt: &Stmt,
+    parents: &[&Stmt],
+    parent_stack: &[usize],
+    locator: &dyn CheckLocator,
+) -> Option<Check> {
+    let mut allowed: bool = false;
+    let mut parent = stmt;
+    for index in parent_stack.iter().rev() {
+        let child = parent;
+        parent = parents[*index];
+        match &parent.node {
+            StmtKind::For { orelse, .. }
+            | StmtKind::AsyncFor { orelse, .. }
+            | StmtKind::While { orelse, .. } => {
+                if !orelse.contains(child) {
+                    allowed = true;
+                    break;
+                }
+            }
+
+            StmtKind::FunctionDef { .. }
+            | StmtKind::AsyncFunctionDef { .. }
+            | StmtKind::ClassDef { .. } => {
+                break;
+            }
+            _ => {}
+        }
+    }
+
+    if !allowed {
+        Some(Check::new(
+            CheckKind::ContinueOutsideLoop,
+            locator.locate_check(stmt.location),
+        ))
+    } else {
+        None
+    }
+}
+
+// flake8-builtins
+pub enum ShadowingType {
+    Variable,
+    Argument,
+    Attribute,
+}
+
+/// Check builtin name shadowing
+pub fn check_builtin_shadowing(
+    name: &str,
+    location: Location,
+    node_type: ShadowingType,
+) -> Option<Check> {
+    if BUILTINS.contains(&name) {
+        Some(Check::new(
+            match node_type {
+                ShadowingType::Variable => CheckKind::BuiltinVariableShadowing(name.to_string()),
+                ShadowingType::Argument => CheckKind::BuiltinArgumentShadowing(name.to_string()),
+                ShadowingType::Attribute => CheckKind::BuiltinAttributeShadowing(name.to_string()),
+            },
+            location,
+        ))
+    } else {
+        None
+    }
+}
--- a/src/ast/operations.rs
+++ b/src/ast/operations.rs
@@ -22,7 +22,7 @@ pub fn extract_all_names(stmt: &Stmt, scope: &Scope) -> Vec<String> {
    if let StmtKind::AugAssign { .. } = &stmt.node {
        if let Some(binding) = scope.values.get("__all__") {
            if let BindingKind::Export(existing) = &binding.kind {
-                names.extend(existing.clone());
+                names.extend_from_slice(existing);
            }
        }
    }
@@ -70,9 +70,7 @@ pub fn extract_all_names(stmt: &Stmt, scope: &Scope) -> Vec<String> {
 pub fn on_conditional_branch(parent_stack: &[usize], parents: &[&Stmt]) -> bool {
    for index in parent_stack.iter().rev() {
        let parent = parents[*index];
-        if matches!(parent.node, StmtKind::If { .. })
-            || matches!(parent.node, StmtKind::While { .. })
-        {
+        if matches!(parent.node, StmtKind::If { .. } | StmtKind::While { .. }) {
            return true;
        }
        if let StmtKind::Expr { value } = &parent.node {
@@ -89,10 +87,10 @@ pub fn on_conditional_branch(parent_stack: &[usize], parents: &[&Stmt]) -> bool
 pub fn in_nested_block(parent_stack: &[usize], parents: &[&Stmt]) -> bool {
    for index in parent_stack.iter().rev() {
        let parent = parents[*index];
-        if matches!(parent.node, StmtKind::Try { .. })
-            || matches!(parent.node, StmtKind::If { .. })
-            || matches!(parent.node, StmtKind::With { .. })
-        {
+        if matches!(
+            parent.node,
+            StmtKind::Try { .. } | StmtKind::If { .. } | StmtKind::With { .. }
+        ) {
            return true;
        }
    }
@@ -100,6 +98,26 @@ pub fn in_nested_block(parent_stack: &[usize], parents: &[&Stmt]) -> bool {
    false
 }

+/// Check if a node represents an unpacking assignment.
+pub fn is_unpacking_assignment(stmt: &Stmt) -> bool {
+    if let StmtKind::Assign { targets, value, .. } = &stmt.node {
+        if !targets.iter().any(|child| {
+            matches!(
+                child.node,
+                ExprKind::Set { .. } | ExprKind::List { .. } | ExprKind::Tuple { .. }
+            )
+        }) {
+            return false;
+        }
+        match &value.node {
+            ExprKind::Set { .. } | ExprKind::List { .. } | ExprKind::Tuple { .. } => return false,
+            _ => {}
+        }
+        return true;
+    }
+    false
+}
+
 /// Struct used to efficiently slice source code at (row, column) Locations.
 pub struct SourceCodeLocator<'a> {
    content: &'a str,
--- a/src/ast/types.rs
+++ b/src/ast/types.rs
@@ -8,10 +8,15 @@ fn id() -> usize {
    COUNTER.fetch_add(1, Ordering::Relaxed)
 }

+#[derive(Clone, Debug, Default)]
+pub struct FunctionScope {
+    pub uses_locals: bool,
+}
+
 #[derive(Clone, Debug)]
 pub enum ScopeKind {
    Class,
-    Function,
+    Function(FunctionScope),
    Generator,
    Module,
 }
@@ -20,6 +25,7 @@ pub enum ScopeKind {
 pub struct Scope {
    pub id: usize,
    pub kind: ScopeKind,
+    pub import_starred: bool,
    pub values: BTreeMap<String, Binding>,
 }

@@ -28,6 +34,7 @@ impl Scope {
        Scope {
            id: id(),
            kind,
+            import_starred: false,
            values: BTreeMap::new(),
        }
    }
@@ -35,8 +42,11 @@ impl Scope {

 #[derive(Clone, Debug)]
 pub enum BindingKind {
+    Annotation,
    Argument,
    Assignment,
+    Binding,
+    LoopVar,
    Builtin,
    ClassDefinition,
    Definition,
@@ -51,5 +61,11 @@ pub enum BindingKind {
 pub struct Binding {
    pub kind: BindingKind,
    pub location: Location,
-    pub used: Option<usize>,
+    /// Tuple of (scope index, location) indicating the scope and location at which the binding was
+    /// last used.
+    pub used: Option<(usize, Location)>,
+}
+
+pub trait CheckLocator {
+    fn locate_check(&self, default: Location) -> Location;
 }
--- a/src/cache.rs
+++ b/src/cache.rs
@@ -1,11 +1,14 @@
 use std::collections::hash_map::DefaultHasher;
-use std::fs::Metadata;
+use std::fs::{create_dir_all, File, Metadata};
 use std::hash::{Hash, Hasher};
+use std::io::Write;
 use std::path::Path;

+use anyhow::Result;
 use cacache::Error::EntryNotFound;
 use filetime::FileTime;
 use log::error;
+use path_absolutize::Absolutize;
 use serde::{Deserialize, Serialize};

 use crate::autofix::fixer;
@@ -77,12 +80,22 @@ fn cache_key(path: &Path, settings: &Settings, autofix: &fixer::Mode) -> String
    autofix.hash(&mut hasher);
    format!(
        "{}@{}@{}",
-        path.canonicalize().unwrap().to_string_lossy(),
+        path.absolutize().unwrap().to_string_lossy(),
        VERSION,
        hasher.finish()
    )
 }

+pub fn init() -> Result<()> {
+    let gitignore_path = Path::new(cache_dir()).join(".gitignore");
+    if gitignore_path.exists() {
+        return Ok(());
+    }
+    create_dir_all(cache_dir())?;
+    let mut file = File::create(gitignore_path)?;
+    file.write_all(b"*").map_err(|e| e.into())
+}
+
 pub fn get(
    path: &Path,
    metadata: &Metadata,
--- a/src/check_ast.rs
+++ b/src/check_ast.rs
--- a/src/check_lines.rs
+++ b/src/check_lines.rs
@@ -1,11 +1,16 @@
+use std::collections::BTreeMap;
+
 use rustpython_parser::ast::Location;

-use crate::checks::{Check, CheckKind};
+use crate::autofix::fixer;
+use crate::checks::{Check, CheckCode, CheckKind, Fix};
+use crate::noqa;
+use crate::noqa::Directive;
 use crate::settings::Settings;

 /// Whether the given line is too long and should be reported.
-fn should_enforce_line_length(line: &str, limit: usize) -> bool {
-    if line.len() > limit {
+fn should_enforce_line_length(line: &str, length: usize, limit: usize) -> bool {
+    if length > limit {
        let mut chunks = line.split_whitespace();
        if let (Some(first), Some(_)) = (chunks.next(), chunks.next()) {
            // Do not enforce the line length for commented lines with a single word
@@ -19,34 +24,187 @@ fn should_enforce_line_length(line: &str, limit: usize) -> bool {
    }
 }

-pub fn check_lines(checks: &mut Vec<Check>, contents: &str, settings: &Settings) {
-    let enforce_line_too_long = settings.select.contains(CheckKind::LineTooLong.code());
+pub fn check_lines(
+    checks: &mut Vec<Check>,
+    contents: &str,
+    noqa_line_for: &[usize],
+    settings: &Settings,
+    autofix: &fixer::Mode,
+) {
+    let enforce_line_too_long = settings.select.contains(&CheckCode::E501);
+    let enforce_noqa = settings.select.contains(&CheckCode::M001);
+
+    let mut noqa_directives: BTreeMap<usize, (Directive, Vec<&str>)> = BTreeMap::new();

    let mut line_checks = vec![];
    let mut ignored = vec![];
-    for (row, line) in contents.lines().enumerate() {
+
+    let lines: Vec<&str> = contents.lines().collect();
+    for (lineno, line) in lines.iter().enumerate() {
+        // Grab the noqa (logical) line number for the current (physical) line.
+        // If there are newlines at the end of the file, they won't be represented in
+        // `noqa_line_for`, so fallback to the current line.
+        let noqa_lineno = noqa_line_for
+            .get(lineno)
+            .map(|lineno| lineno - 1)
+            .unwrap_or(lineno);
+
+        if enforce_noqa {
+            noqa_directives
+                .entry(noqa_lineno)
+                .or_insert_with(|| (noqa::extract_noqa_directive(lines[noqa_lineno]), vec![]));
+        }
+
        // Remove any ignored checks.
        // TODO(charlie): Only validate checks for the current line.
        for (index, check) in checks.iter().enumerate() {
-            if check.location.row() == row + 1 && check.is_inline_ignored(line) {
-                ignored.push(index);
+            if check.location.row() == lineno + 1 {
+                let noqa = noqa_directives
+                    .entry(noqa_lineno)
+                    .or_insert_with(|| (noqa::extract_noqa_directive(lines[noqa_lineno]), vec![]));
+
+                match noqa {
+                    (Directive::All(_), matches) => {
+                        matches.push(check.kind.code().as_str());
+                        ignored.push(index)
+                    }
+                    (Directive::Codes(_, codes), matches) => {
+                        if codes.contains(&check.kind.code().as_str()) {
+                            matches.push(check.kind.code().as_str());
+                            ignored.push(index);
+                        }
+                    }
+                    (Directive::None, _) => {}
+                }
            }
        }

        // Enforce line length.
-        if enforce_line_too_long && should_enforce_line_length(line, settings.line_length) {
-            let check = Check::new(
-                CheckKind::LineTooLong,
-                Location::new(row + 1, settings.line_length + 1),
-            );
-            if !check.is_inline_ignored(line) {
-                line_checks.push(check);
+        if enforce_line_too_long {
+            let line_length = line.chars().count();
+            if should_enforce_line_length(line, line_length, settings.line_length) {
+                let noqa = noqa_directives
+                    .entry(noqa_lineno)
+                    .or_insert_with(|| (noqa::extract_noqa_directive(lines[noqa_lineno]), vec![]));
+
+                let check = Check::new(
+                    CheckKind::LineTooLong(line_length, settings.line_length),
+                    Location::new(lineno + 1, settings.line_length + 1),
+                );
+
+                match noqa {
+                    (Directive::All(_), matches) => {
+                        matches.push(check.kind.code().as_str());
+                    }
+                    (Directive::Codes(_, codes), matches) => {
+                        if codes.contains(&check.kind.code().as_str()) {
+                            matches.push(check.kind.code().as_str());
+                        } else {
+                            line_checks.push(check);
+                        }
+                    }
+                    (Directive::None, _) => line_checks.push(check),
+                }
            }
        }
    }
+
+    // Enforce that the noqa directive was actually used.
+    if enforce_noqa {
+        for (row, (directive, matches)) in noqa_directives {
+            match directive {
+                Directive::All(column) => {
+                    if matches.is_empty() {
+                        let mut check = Check::new(
+                            CheckKind::UnusedNOQA(None),
+                            Location::new(row + 1, column + 1),
+                        );
+                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                            check.amend(Fix {
+                                content: "".to_string(),
+                                start: Location::new(row + 1, column + 1),
+                                end: Location::new(row + 1, lines[row].chars().count() + 1),
+                                applied: false,
+                            });
+                        }
+                        line_checks.push(check);
+                    }
+                }
+                Directive::Codes(column, codes) => {
+                    let mut invalid_codes = vec![];
+                    let mut valid_codes = vec![];
+                    for code in codes {
+                        if !matches.contains(&code) {
+                            invalid_codes.push(code);
+                        } else {
+                            valid_codes.push(code);
+                        }
+                    }
+
+                    if !invalid_codes.is_empty() {
+                        let mut check = Check::new(
+                            CheckKind::UnusedNOQA(Some(invalid_codes.join(", "))),
+                            Location::new(row + 1, column + 1),
+                        );
+                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                            if valid_codes.is_empty() {
+                                check.amend(Fix {
+                                    content: "".to_string(),
+                                    start: Location::new(row + 1, column + 1),
+                                    end: Location::new(row + 1, lines[row].chars().count() + 1),
+                                    applied: false,
+                                });
+                            } else {
+                                check.amend(Fix {
+                                    content: format!("  # noqa: {}", valid_codes.join(", ")),
+                                    start: Location::new(row + 1, column + 1),
+                                    end: Location::new(row + 1, lines[row].chars().count() + 1),
+                                    applied: false,
+                                });
+                            }
+                        }
+                        line_checks.push(check);
+                    }
+                }
+                Directive::None => {}
+            }
+        }
+    }
+
    ignored.sort();
    for index in ignored.iter().rev() {
        checks.swap_remove(*index);
    }
    checks.extend(line_checks);
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::autofix::fixer;
+    use crate::checks::{Check, CheckCode};
+    use crate::settings;
+
+    use super::check_lines;
+
+    #[test]
+    fn e501_non_ascii_char() {
+        let line = "'\u{4e9c}' * 2"; // 7 in UTF-32, 9 in UTF-8.
+        let noqa_line_for: Vec<usize> = vec![1];
+        let check_with_max_line_length = |line_length: usize| {
+            let mut checks: Vec<Check> = vec![];
+            check_lines(
+                &mut checks,
+                line,
+                &noqa_line_for,
+                &settings::Settings {
+                    line_length,
+                    ..settings::Settings::for_rule(CheckCode::E501)
+                },
+                &fixer::Mode::Generate,
+            );
+            return checks;
+        };
+        assert!(!check_with_max_line_length(6).is_empty());
+        assert!(check_with_max_line_length(7).is_empty());
+    }
+}
--- a/src/checks.rs
+++ b/src/checks.rs
@@ -1,12 +1,111 @@
 use std::str::FromStr;

 use anyhow::Result;
-use once_cell::sync::Lazy;
-use regex::Regex;
 use rustpython_parser::ast::Location;
 use serde::{Deserialize, Serialize};

-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Hash, PartialOrd, Ord)]
+pub const DEFAULT_CHECK_CODES: [CheckCode; 45] = [
+    CheckCode::E402,
+    CheckCode::E501,
+    CheckCode::E711,
+    CheckCode::E712,
+    CheckCode::E713,
+    CheckCode::E714,
+    CheckCode::E721,
+    CheckCode::E722,
+    CheckCode::E731,
+    CheckCode::E741,
+    CheckCode::E742,
+    CheckCode::E743,
+    CheckCode::E902,
+    CheckCode::E999,
+    CheckCode::F401,
+    CheckCode::F402,
+    CheckCode::F403,
+    CheckCode::F404,
+    CheckCode::F405,
+    CheckCode::F406,
+    CheckCode::F407,
+    CheckCode::F541,
+    CheckCode::F601,
+    CheckCode::F602,
+    CheckCode::F621,
+    CheckCode::F622,
+    CheckCode::F631,
+    CheckCode::F632,
+    CheckCode::F633,
+    CheckCode::F634,
+    CheckCode::F701,
+    CheckCode::F702,
+    CheckCode::F704,
+    CheckCode::F706,
+    CheckCode::F707,
+    CheckCode::F722,
+    CheckCode::F821,
+    CheckCode::F822,
+    CheckCode::F823,
+    CheckCode::F831,
+    CheckCode::F841,
+    CheckCode::F901,
+    // flake8-builtins
+    CheckCode::A001,
+    CheckCode::A002,
+    CheckCode::A003,
+];
+
+pub const ALL_CHECK_CODES: [CheckCode; 48] = [
+    CheckCode::E402,
+    CheckCode::E501,
+    CheckCode::E711,
+    CheckCode::E712,
+    CheckCode::E713,
+    CheckCode::E714,
+    CheckCode::E721,
+    CheckCode::E722,
+    CheckCode::E731,
+    CheckCode::E741,
+    CheckCode::E742,
+    CheckCode::E743,
+    CheckCode::E902,
+    CheckCode::E999,
+    CheckCode::F401,
+    CheckCode::F402,
+    CheckCode::F403,
+    CheckCode::F404,
+    CheckCode::F405,
+    CheckCode::F406,
+    CheckCode::F407,
+    CheckCode::F541,
+    CheckCode::F601,
+    CheckCode::F602,
+    CheckCode::F621,
+    CheckCode::F622,
+    CheckCode::F631,
+    CheckCode::F632,
+    CheckCode::F633,
+    CheckCode::F634,
+    CheckCode::F701,
+    CheckCode::F702,
+    CheckCode::F704,
+    CheckCode::F706,
+    CheckCode::F707,
+    CheckCode::F722,
+    CheckCode::F821,
+    CheckCode::F822,
+    CheckCode::F823,
+    CheckCode::F831,
+    CheckCode::F841,
+    CheckCode::F901,
+    CheckCode::M001,
+    CheckCode::R001,
+    CheckCode::R002,
+    // flake8-builtins
+    CheckCode::A001,
+    CheckCode::A002,
+    CheckCode::A003,
+];
+
+#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize, Hash, PartialOrd, Ord)]
 pub enum CheckCode {
    E402,
    E501,
@@ -14,20 +113,36 @@ pub enum CheckCode {
    E712,
    E713,
    E714,
+    E721,
+    E722,
    E731,
+    E741,
+    E742,
+    E743,
    E902,
+    E999,
    F401,
+    F402,
    F403,
+    F404,
+    F405,
+    F406,
+    F407,
    F541,
    F601,
    F602,
    F621,
    F622,
    F631,
+    F632,
+    F633,
    F634,
+    F701,
+    F702,
    F704,
    F706,
    F707,
+    F722,
    F821,
    F822,
    F823,
@@ -36,6 +151,11 @@ pub enum CheckCode {
    F901,
    R001,
    R002,
+    M001,
+    // flake8-builtins
+    A001,
+    A002,
+    A003,
 }

 impl FromStr for CheckCode {
@@ -49,20 +169,36 @@ impl FromStr for CheckCode {
            "E712" => Ok(CheckCode::E712),
            "E713" => Ok(CheckCode::E713),
            "E714" => Ok(CheckCode::E714),
+            "E721" => Ok(CheckCode::E721),
+            "E722" => Ok(CheckCode::E722),
            "E731" => Ok(CheckCode::E731),
+            "E741" => Ok(CheckCode::E741),
+            "E742" => Ok(CheckCode::E742),
+            "E743" => Ok(CheckCode::E743),
            "E902" => Ok(CheckCode::E902),
+            "E999" => Ok(CheckCode::E999),
            "F401" => Ok(CheckCode::F401),
+            "F402" => Ok(CheckCode::F402),
            "F403" => Ok(CheckCode::F403),
+            "F404" => Ok(CheckCode::F404),
+            "F405" => Ok(CheckCode::F405),
+            "F406" => Ok(CheckCode::F406),
+            "F407" => Ok(CheckCode::F407),
            "F541" => Ok(CheckCode::F541),
            "F601" => Ok(CheckCode::F601),
            "F602" => Ok(CheckCode::F602),
            "F621" => Ok(CheckCode::F621),
            "F622" => Ok(CheckCode::F622),
            "F631" => Ok(CheckCode::F631),
+            "F632" => Ok(CheckCode::F632),
+            "F633" => Ok(CheckCode::F633),
            "F634" => Ok(CheckCode::F634),
+            "F701" => Ok(CheckCode::F701),
+            "F702" => Ok(CheckCode::F702),
            "F704" => Ok(CheckCode::F704),
            "F706" => Ok(CheckCode::F706),
            "F707" => Ok(CheckCode::F707),
+            "F722" => Ok(CheckCode::F722),
            "F821" => Ok(CheckCode::F821),
            "F822" => Ok(CheckCode::F822),
            "F823" => Ok(CheckCode::F823),
@@ -71,6 +207,11 @@ impl FromStr for CheckCode {
            "F901" => Ok(CheckCode::F901),
            "R001" => Ok(CheckCode::R001),
            "R002" => Ok(CheckCode::R002),
+            "M001" => Ok(CheckCode::M001),
+            // flake8-builtins
+            "A001" => Ok(CheckCode::A001),
+            "A002" => Ok(CheckCode::A002),
+            "A003" => Ok(CheckCode::A003),
            _ => Err(anyhow::anyhow!("Unknown check code: {s}")),
        }
    }
@@ -85,20 +226,36 @@ impl CheckCode {
            CheckCode::E712 => "E712",
            CheckCode::E713 => "E713",
            CheckCode::E714 => "E714",
+            CheckCode::E721 => "E721",
+            CheckCode::E722 => "E722",
            CheckCode::E731 => "E731",
+            CheckCode::E741 => "E741",
+            CheckCode::E742 => "E742",
+            CheckCode::E743 => "E743",
            CheckCode::E902 => "E902",
+            CheckCode::E999 => "E999",
            CheckCode::F401 => "F401",
+            CheckCode::F402 => "F402",
            CheckCode::F403 => "F403",
+            CheckCode::F404 => "F404",
+            CheckCode::F405 => "F405",
+            CheckCode::F406 => "F406",
+            CheckCode::F407 => "F407",
            CheckCode::F541 => "F541",
            CheckCode::F601 => "F601",
            CheckCode::F602 => "F602",
            CheckCode::F621 => "F621",
            CheckCode::F622 => "F622",
            CheckCode::F631 => "F631",
+            CheckCode::F632 => "F632",
+            CheckCode::F633 => "F633",
            CheckCode::F634 => "F634",
+            CheckCode::F701 => "F701",
+            CheckCode::F702 => "F702",
            CheckCode::F704 => "F704",
            CheckCode::F706 => "F706",
            CheckCode::F707 => "F707",
+            CheckCode::F722 => "F722",
            CheckCode::F821 => "F821",
            CheckCode::F822 => "F822",
            CheckCode::F823 => "F823",
@@ -107,40 +264,75 @@ impl CheckCode {
            CheckCode::F901 => "F901",
            CheckCode::R001 => "R001",
            CheckCode::R002 => "R002",
+            CheckCode::M001 => "M001",
+            // flake8-builtins
+            CheckCode::A001 => "A001",
+            CheckCode::A002 => "A002",
+            CheckCode::A003 => "A003",
        }
    }

-    /// The source for the check (either the AST, or the physical lines).
+    /// The source for the check (either the AST, the filesystem, or the physical lines).
    pub fn lint_source(&self) -> &'static LintSource {
        match self {
-            CheckCode::E402 => &LintSource::AST,
-            CheckCode::E501 => &LintSource::Lines,
-            CheckCode::E711 => &LintSource::AST,
-            CheckCode::E712 => &LintSource::AST,
-            CheckCode::E713 => &LintSource::AST,
-            CheckCode::E714 => &LintSource::AST,
-            CheckCode::E731 => &LintSource::AST,
+            CheckCode::E501 | CheckCode::M001 => &LintSource::Lines,
            CheckCode::E902 => &LintSource::FileSystem,
-            CheckCode::F401 => &LintSource::AST,
-            CheckCode::F403 => &LintSource::AST,
-            CheckCode::F541 => &LintSource::AST,
-            CheckCode::F601 => &LintSource::AST,
-            CheckCode::F602 => &LintSource::AST,
-            CheckCode::F621 => &LintSource::AST,
-            CheckCode::F622 => &LintSource::AST,
-            CheckCode::F631 => &LintSource::AST,
-            CheckCode::F634 => &LintSource::AST,
-            CheckCode::F704 => &LintSource::AST,
-            CheckCode::F706 => &LintSource::AST,
-            CheckCode::F707 => &LintSource::AST,
-            CheckCode::F821 => &LintSource::AST,
-            CheckCode::F822 => &LintSource::AST,
-            CheckCode::F823 => &LintSource::AST,
-            CheckCode::F831 => &LintSource::AST,
-            CheckCode::F841 => &LintSource::AST,
-            CheckCode::F901 => &LintSource::AST,
-            CheckCode::R001 => &LintSource::AST,
-            CheckCode::R002 => &LintSource::AST,
+            _ => &LintSource::AST,
+        }
+    }
+
+    /// A placeholder representation of the CheckKind for the check.
+    pub fn kind(&self) -> CheckKind {
+        match self {
+            CheckCode::E402 => CheckKind::ModuleImportNotAtTopOfFile,
+            CheckCode::E501 => CheckKind::LineTooLong(89, 88),
+            CheckCode::E711 => CheckKind::NoneComparison(RejectedCmpop::Eq),
+            CheckCode::E712 => CheckKind::TrueFalseComparison(true, RejectedCmpop::Eq),
+            CheckCode::E713 => CheckKind::NotInTest,
+            CheckCode::E714 => CheckKind::NotIsTest,
+            CheckCode::E721 => CheckKind::TypeComparison,
+            CheckCode::E722 => CheckKind::DoNotUseBareExcept,
+            CheckCode::E731 => CheckKind::DoNotAssignLambda,
+            CheckCode::E741 => CheckKind::AmbiguousVariableName("...".to_string()),
+            CheckCode::E742 => CheckKind::AmbiguousClassName("...".to_string()),
+            CheckCode::E743 => CheckKind::AmbiguousFunctionName("...".to_string()),
+            CheckCode::E902 => CheckKind::IOError("...".to_string()),
+            CheckCode::E999 => CheckKind::SyntaxError("...".to_string()),
+            CheckCode::F401 => CheckKind::UnusedImport("...".to_string()),
+            CheckCode::F402 => CheckKind::ImportShadowedByLoopVar("...".to_string(), 1),
+            CheckCode::F403 => CheckKind::ImportStarUsed("...".to_string()),
+            CheckCode::F404 => CheckKind::LateFutureImport,
+            CheckCode::F405 => CheckKind::ImportStarUsage("...".to_string(), "...".to_string()),
+            CheckCode::F406 => CheckKind::ImportStarNotPermitted("...".to_string()),
+            CheckCode::F407 => CheckKind::FutureFeatureNotDefined("...".to_string()),
+            CheckCode::F541 => CheckKind::FStringMissingPlaceholders,
+            CheckCode::F601 => CheckKind::MultiValueRepeatedKeyLiteral,
+            CheckCode::F602 => CheckKind::MultiValueRepeatedKeyVariable("...".to_string()),
+            CheckCode::F621 => CheckKind::TooManyExpressionsInStarredAssignment,
+            CheckCode::F622 => CheckKind::TwoStarredExpressions,
+            CheckCode::F631 => CheckKind::AssertTuple,
+            CheckCode::F632 => CheckKind::IsLiteral,
+            CheckCode::F633 => CheckKind::InvalidPrintSyntax,
+            CheckCode::F634 => CheckKind::IfTuple,
+            CheckCode::F701 => CheckKind::BreakOutsideLoop,
+            CheckCode::F702 => CheckKind::ContinueOutsideLoop,
+            CheckCode::F704 => CheckKind::YieldOutsideFunction,
+            CheckCode::F706 => CheckKind::ReturnOutsideFunction,
+            CheckCode::F707 => CheckKind::DefaultExceptNotLast,
+            CheckCode::F722 => CheckKind::ForwardAnnotationSyntaxError("...".to_string()),
+            CheckCode::F821 => CheckKind::UndefinedName("...".to_string()),
+            CheckCode::F822 => CheckKind::UndefinedExport("...".to_string()),
+            CheckCode::F823 => CheckKind::UndefinedLocal("...".to_string()),
+            CheckCode::F831 => CheckKind::DuplicateArgumentName,
+            CheckCode::F841 => CheckKind::UnusedVariable("...".to_string()),
+            CheckCode::F901 => CheckKind::RaiseNotImplemented,
+            CheckCode::M001 => CheckKind::UnusedNOQA(None),
+            CheckCode::R001 => CheckKind::UselessObjectInheritance("...".to_string()),
+            CheckCode::R002 => CheckKind::NoAssertEquals,
+            // flake8-builtins
+            CheckCode::A001 => CheckKind::BuiltinVariableShadowing("...".to_string()),
+            CheckCode::A002 => CheckKind::BuiltinArgumentShadowing("...".to_string()),
+            CheckCode::A003 => CheckKind::BuiltinAttributeShadowing("...".to_string()),
        }
    }
 }
@@ -160,15 +352,30 @@ pub enum RejectedCmpop {

 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub enum CheckKind {
+    UnusedNOQA(Option<String>),
+    AmbiguousClassName(String),
+    AmbiguousFunctionName(String),
+    AmbiguousVariableName(String),
    AssertTuple,
+    BreakOutsideLoop,
+    ContinueOutsideLoop,
    DefaultExceptNotLast,
    DoNotAssignLambda,
+    DoNotUseBareExcept,
    DuplicateArgumentName,
+    ForwardAnnotationSyntaxError(String),
    FStringMissingPlaceholders,
+    FutureFeatureNotDefined(String),
    IOError(String),
    IfTuple,
-    ImportStarUsage,
-    LineTooLong,
+    ImportShadowedByLoopVar(String, usize),
+    ImportStarNotPermitted(String),
+    ImportStarUsage(String, String),
+    ImportStarUsed(String),
+    InvalidPrintSyntax,
+    IsLiteral,
+    LateFutureImport,
+    LineTooLong(usize, usize),
    ModuleImportNotAtTopOfFile,
    MultiValueRepeatedKeyLiteral,
    MultiValueRepeatedKeyVariable(String),
@@ -178,9 +385,11 @@ pub enum CheckKind {
    NotIsTest,
    RaiseNotImplemented,
    ReturnOutsideFunction,
+    SyntaxError(String),
    TooManyExpressionsInStarredAssignment,
    TrueFalseComparison(bool, RejectedCmpop),
    TwoStarredExpressions,
+    TypeComparison,
    UndefinedExport(String),
    UndefinedLocal(String),
    UndefinedName(String),
@@ -188,21 +397,39 @@ pub enum CheckKind {
    UnusedVariable(String),
    UselessObjectInheritance(String),
    YieldOutsideFunction,
+    // flake8-builtin
+    BuiltinVariableShadowing(String),
+    BuiltinArgumentShadowing(String),
+    BuiltinAttributeShadowing(String),
 }

 impl CheckKind {
    /// The name of the check.
    pub fn name(&self) -> &'static str {
        match self {
+            CheckKind::AmbiguousClassName(_) => "AmbiguousClassName",
+            CheckKind::AmbiguousFunctionName(_) => "AmbiguousFunctionName",
+            CheckKind::AmbiguousVariableName(_) => "AmbiguousVariableName",
            CheckKind::AssertTuple => "AssertTuple",
+            CheckKind::BreakOutsideLoop => "BreakOutsideLoop",
+            CheckKind::ContinueOutsideLoop => "ContinueOutsideLoop",
            CheckKind::DefaultExceptNotLast => "DefaultExceptNotLast",
+            CheckKind::DoNotAssignLambda => "DoNotAssignLambda",
+            CheckKind::DoNotUseBareExcept => "DoNotUseBareExcept",
            CheckKind::DuplicateArgumentName => "DuplicateArgumentName",
            CheckKind::FStringMissingPlaceholders => "FStringMissingPlaceholders",
+            CheckKind::ForwardAnnotationSyntaxError(_) => "ForwardAnnotationSyntaxError",
+            CheckKind::FutureFeatureNotDefined(_) => "FutureFeatureNotDefined",
            CheckKind::IOError(_) => "IOError",
            CheckKind::IfTuple => "IfTuple",
-            CheckKind::ImportStarUsage => "ImportStarUsage",
-            CheckKind::LineTooLong => "LineTooLong",
-            CheckKind::DoNotAssignLambda => "DoNotAssignLambda",
+            CheckKind::ImportShadowedByLoopVar(_, _) => "ImportShadowedByLoopVar",
+            CheckKind::ImportStarNotPermitted(_) => "ImportStarNotPermitted",
+            CheckKind::ImportStarUsage(_, _) => "ImportStarUsage",
+            CheckKind::ImportStarUsed(_) => "ImportStarUsed",
+            CheckKind::InvalidPrintSyntax => "InvalidPrintSyntax",
+            CheckKind::IsLiteral => "IsLiteral",
+            CheckKind::LateFutureImport => "LateFutureImport",
+            CheckKind::LineTooLong(_, _) => "LineTooLong",
            CheckKind::ModuleImportNotAtTopOfFile => "ModuleImportNotAtTopOfFile",
            CheckKind::MultiValueRepeatedKeyLiteral => "MultiValueRepeatedKeyLiteral",
            CheckKind::MultiValueRepeatedKeyVariable(_) => "MultiValueRepeatedKeyVariable",
@@ -212,11 +439,13 @@ impl CheckKind {
            CheckKind::NotIsTest => "NotIsTest",
            CheckKind::RaiseNotImplemented => "RaiseNotImplemented",
            CheckKind::ReturnOutsideFunction => "ReturnOutsideFunction",
+            CheckKind::SyntaxError(_) => "SyntaxError",
            CheckKind::TooManyExpressionsInStarredAssignment => {
                "TooManyExpressionsInStarredAssignment"
            }
            CheckKind::TrueFalseComparison(_, _) => "TrueFalseComparison",
            CheckKind::TwoStarredExpressions => "TwoStarredExpressions",
+            CheckKind::TypeComparison => "TypeComparison",
            CheckKind::UndefinedExport(_) => "UndefinedExport",
            CheckKind::UndefinedLocal(_) => "UndefinedLocal",
            CheckKind::UndefinedName(_) => "UndefinedName",
@@ -224,21 +453,40 @@ impl CheckKind {
            CheckKind::UnusedVariable(_) => "UnusedVariable",
            CheckKind::UselessObjectInheritance(_) => "UselessObjectInheritance",
            CheckKind::YieldOutsideFunction => "YieldOutsideFunction",
+            CheckKind::UnusedNOQA(_) => "UnusedNOQA",
+            // flake8-builtins
+            CheckKind::BuiltinVariableShadowing(_) => "BuiltinVariableShadowing",
+            CheckKind::BuiltinArgumentShadowing(_) => "BuiltinArgumentShadowing",
+            CheckKind::BuiltinAttributeShadowing(_) => "BuiltinAttributeShadowing",
        }
    }

    /// A four-letter shorthand code for the check.
    pub fn code(&self) -> &'static CheckCode {
        match self {
+            CheckKind::AmbiguousClassName(_) => &CheckCode::E742,
+            CheckKind::AmbiguousFunctionName(_) => &CheckCode::E743,
+            CheckKind::AmbiguousVariableName(_) => &CheckCode::E741,
            CheckKind::AssertTuple => &CheckCode::F631,
+            CheckKind::BreakOutsideLoop => &CheckCode::F701,
+            CheckKind::ContinueOutsideLoop => &CheckCode::F702,
            CheckKind::DefaultExceptNotLast => &CheckCode::F707,
+            CheckKind::DoNotAssignLambda => &CheckCode::E731,
+            CheckKind::DoNotUseBareExcept => &CheckCode::E722,
            CheckKind::DuplicateArgumentName => &CheckCode::F831,
            CheckKind::FStringMissingPlaceholders => &CheckCode::F541,
+            CheckKind::ForwardAnnotationSyntaxError(_) => &CheckCode::F722,
+            CheckKind::FutureFeatureNotDefined(_) => &CheckCode::F407,
            CheckKind::IOError(_) => &CheckCode::E902,
            CheckKind::IfTuple => &CheckCode::F634,
-            CheckKind::ImportStarUsage => &CheckCode::F403,
-            CheckKind::LineTooLong => &CheckCode::E501,
-            CheckKind::DoNotAssignLambda => &CheckCode::E731,
+            CheckKind::ImportShadowedByLoopVar(_, _) => &CheckCode::F402,
+            CheckKind::ImportStarNotPermitted(_) => &CheckCode::F406,
+            CheckKind::ImportStarUsage(_, _) => &CheckCode::F405,
+            CheckKind::ImportStarUsed(_) => &CheckCode::F403,
+            CheckKind::InvalidPrintSyntax => &CheckCode::F633,
+            CheckKind::IsLiteral => &CheckCode::F632,
+            CheckKind::LateFutureImport => &CheckCode::F404,
+            CheckKind::LineTooLong(_, _) => &CheckCode::E501,
            CheckKind::ModuleImportNotAtTopOfFile => &CheckCode::E402,
            CheckKind::MultiValueRepeatedKeyLiteral => &CheckCode::F601,
            CheckKind::MultiValueRepeatedKeyVariable(_) => &CheckCode::F602,
@@ -248,42 +496,83 @@ impl CheckKind {
            CheckKind::NotIsTest => &CheckCode::E714,
            CheckKind::RaiseNotImplemented => &CheckCode::F901,
            CheckKind::ReturnOutsideFunction => &CheckCode::F706,
+            CheckKind::SyntaxError(_) => &CheckCode::E999,
            CheckKind::TooManyExpressionsInStarredAssignment => &CheckCode::F621,
            CheckKind::TrueFalseComparison(_, _) => &CheckCode::E712,
            CheckKind::TwoStarredExpressions => &CheckCode::F622,
+            CheckKind::TypeComparison => &CheckCode::E721,
            CheckKind::UndefinedExport(_) => &CheckCode::F822,
            CheckKind::UndefinedLocal(_) => &CheckCode::F823,
            CheckKind::UndefinedName(_) => &CheckCode::F821,
            CheckKind::UnusedImport(_) => &CheckCode::F401,
+            CheckKind::UnusedNOQA(_) => &CheckCode::M001,
            CheckKind::UnusedVariable(_) => &CheckCode::F841,
            CheckKind::UselessObjectInheritance(_) => &CheckCode::R001,
            CheckKind::YieldOutsideFunction => &CheckCode::F704,
+            // flake8-builtins
+            CheckKind::BuiltinVariableShadowing(_) => &CheckCode::A001,
+            CheckKind::BuiltinArgumentShadowing(_) => &CheckCode::A002,
+            CheckKind::BuiltinAttributeShadowing(_) => &CheckCode::A003,
        }
    }

    /// The body text for the check.
    pub fn body(&self) -> String {
        match self {
+            CheckKind::AmbiguousClassName(name) => {
+                format!("ambiguous class name '{}'", name)
+            }
+            CheckKind::AmbiguousFunctionName(name) => {
+                format!("ambiguous function name '{}'", name)
+            }
+            CheckKind::AmbiguousVariableName(name) => {
+                format!("ambiguous variable name '{}'", name)
+            }
            CheckKind::AssertTuple => {
                "Assert test is a non-empty tuple, which is always `True`".to_string()
            }
+            CheckKind::BreakOutsideLoop => "`break` outside loop".to_string(),
+            CheckKind::ContinueOutsideLoop => "`continue` not properly in loop".to_string(),
            CheckKind::DefaultExceptNotLast => {
                "an `except:` block as not the last exception handler".to_string()
            }
+            CheckKind::DoNotAssignLambda => {
+                "Do not assign a lambda expression, use a def".to_string()
+            }
+            CheckKind::DoNotUseBareExcept => "Do not use bare `except`".to_string(),
            CheckKind::DuplicateArgumentName => {
                "Duplicate argument name in function definition".to_string()
            }
+            CheckKind::ForwardAnnotationSyntaxError(body) => {
+                format!("syntax error in forward annotation '{body}'")
+            }
            CheckKind::FStringMissingPlaceholders => {
                "f-string without any placeholders".to_string()
            }
-            CheckKind::IOError(name) => {
-                format!("No such file or directory: `{name}`")
+            CheckKind::FutureFeatureNotDefined(name) => {
+                format!("future feature '{name}' is not defined")
            }
+            CheckKind::IOError(message) => message.clone(),
            CheckKind::IfTuple => "If test is a tuple, which is always `True`".to_string(),
-            CheckKind::ImportStarUsage => "Unable to detect undefined names".to_string(),
-            CheckKind::LineTooLong => "Line too long".to_string(),
-            CheckKind::DoNotAssignLambda => {
-                "Do not assign a lambda expression, use a def".to_string()
+            CheckKind::InvalidPrintSyntax => "use of >> is invalid with print function".to_string(),
+            CheckKind::ImportShadowedByLoopVar(name, line) => {
+                format!("import '{name}' from line {line} shadowed by loop variable")
+            }
+            CheckKind::ImportStarNotPermitted(name) => {
+                format!("`from {name} import *` only allowed at module level")
+            }
+            CheckKind::ImportStarUsed(name) => {
+                format!("`from {name} import *` used; unable to detect undefined names")
+            }
+            CheckKind::ImportStarUsage(name, sources) => {
+                format!("'{name}' may be undefined, or defined from star imports: {sources}")
+            }
+            CheckKind::IsLiteral => "use ==/!= to compare constant literals".to_string(),
+            CheckKind::LateFutureImport => {
+                "from __future__ imports must occur at the beginning of the file".to_string()
+            }
+            CheckKind::LineTooLong(length, limit) => {
+                format!("Line too long ({length} > {limit} characters)")
            }
            CheckKind::ModuleImportNotAtTopOfFile => {
                "Module level import not at top of file".to_string()
@@ -311,6 +600,7 @@ impl CheckKind {
            CheckKind::ReturnOutsideFunction => {
                "a `return` statement outside of a function/method".to_string()
            }
+            CheckKind::SyntaxError(message) => format!("SyntaxError: {message}"),
            CheckKind::TooManyExpressionsInStarredAssignment => {
                "too many expressions in star-unpacking assignment".to_string()
            }
@@ -333,15 +623,16 @@ impl CheckKind {
                },
            },
            CheckKind::TwoStarredExpressions => "two starred expressions in assignment".to_string(),
+            CheckKind::TypeComparison => "do not compare types, use `isinstance()`".to_string(),
            CheckKind::UndefinedExport(name) => {
                format!("Undefined name `{name}` in `__all__`")
            }
-            CheckKind::UndefinedName(name) => {
-                format!("Undefined name `{name}`")
-            }
            CheckKind::UndefinedLocal(name) => {
                format!("Local variable `{name}` referenced before assignment")
            }
+            CheckKind::UndefinedName(name) => {
+                format!("Undefined name `{name}`")
+            }
            CheckKind::UnusedImport(name) => format!("`{name}` imported but unused"),
            CheckKind::UnusedVariable(name) => {
                format!("Local variable `{name}` is assigned to but never used")
@@ -352,41 +643,31 @@ impl CheckKind {
            CheckKind::YieldOutsideFunction => {
                "a `yield` or `yield from` statement outside of a function/method".to_string()
            }
+            CheckKind::UnusedNOQA(code) => match code {
+                None => "Unused `noqa` directive".to_string(),
+                Some(code) => format!("Unused `noqa` directive for: {code}"),
+            },
+            // flake8-builtins
+            CheckKind::BuiltinVariableShadowing(name) => {
+                format!("Variable `{name}` is shadowing a python builtin")
+            }
+            CheckKind::BuiltinArgumentShadowing(name) => {
+                format!("Argument `{name}` is shadowing a python builtin")
+            }
+            CheckKind::BuiltinAttributeShadowing(name) => {
+                format!("class attribute `{name}` is shadowing a python builtin")
+            }
        }
    }

    /// Whether the check kind is (potentially) fixable.
    pub fn fixable(&self) -> bool {
-        match self {
-            CheckKind::AssertTuple => false,
-            CheckKind::DefaultExceptNotLast => false,
-            CheckKind::DuplicateArgumentName => false,
-            CheckKind::FStringMissingPlaceholders => false,
-            CheckKind::IOError(_) => false,
-            CheckKind::IfTuple => false,
-            CheckKind::ImportStarUsage => false,
-            CheckKind::DoNotAssignLambda => false,
-            CheckKind::LineTooLong => false,
-            CheckKind::ModuleImportNotAtTopOfFile => false,
-            CheckKind::MultiValueRepeatedKeyLiteral => false,
-            CheckKind::MultiValueRepeatedKeyVariable(_) => false,
-            CheckKind::NoAssertEquals => true,
-            CheckKind::NotInTest => false,
-            CheckKind::NotIsTest => false,
-            CheckKind::NoneComparison(_) => false,
-            CheckKind::RaiseNotImplemented => false,
-            CheckKind::ReturnOutsideFunction => false,
-            CheckKind::TooManyExpressionsInStarredAssignment => false,
-            CheckKind::TrueFalseComparison(_, _) => false,
-            CheckKind::TwoStarredExpressions => false,
-            CheckKind::UndefinedExport(_) => false,
-            CheckKind::UndefinedLocal(_) => false,
-            CheckKind::UndefinedName(_) => false,
-            CheckKind::UnusedImport(_) => false,
-            CheckKind::UnusedVariable(_) => false,
-            CheckKind::UselessObjectInheritance(_) => true,
-            CheckKind::YieldOutsideFunction => false,
-        }
+        matches!(
+            self,
+            CheckKind::NoAssertEquals
+                | CheckKind::UselessObjectInheritance(_)
+                | CheckKind::UnusedNOQA(_)
+        )
    }
 }

@@ -405,11 +686,6 @@ pub struct Check {
    pub fix: Option<Fix>,
 }

-static NO_QA_REGEX: Lazy<Regex> = Lazy::new(|| {
-    Regex::new(r"(?i)# noqa(?::\s?(?P<codes>([A-Z]+[0-9]+(?:[,\s]+)?)+))?").expect("Invalid regex")
-});
-static SPLIT_COMMA_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"[,\s]").expect("Invalid regex"));
-
 impl Check {
    pub fn new(kind: CheckKind, location: Location) -> Self {
        Self {
@@ -422,25 +698,4 @@ impl Check {
    pub fn amend(&mut self, fix: Fix) {
        self.fix = Some(fix);
    }
-
-    pub fn is_inline_ignored(&self, line: &str) -> bool {
-        match NO_QA_REGEX.captures(line) {
-            Some(caps) => match caps.name("codes") {
-                Some(codes) => {
-                    for code in SPLIT_COMMA_REGEX
-                        .split(codes.as_str())
-                        .map(|code| code.trim())
-                        .filter(|code| !code.is_empty())
-                    {
-                        if code == self.kind.code().as_str() {
-                            return true;
-                        }
-                    }
-                    false
-                }
-                None => true,
-            },
-            None => false,
-        }
-    }
 }
--- a/src/fs.rs
+++ b/src/fs.rs
@@ -1,39 +1,167 @@
+use std::borrow::Cow;
+use std::collections::BTreeSet;
 use std::fs::File;
 use std::io::{BufReader, Read};
+use std::ops::Deref;
 use std::path::{Path, PathBuf};

-use anyhow::Result;
-use glob::Pattern;
+use anyhow::{anyhow, Result};
+use log::debug;
+use path_absolutize::path_dedot;
+use path_absolutize::Absolutize;
 use walkdir::{DirEntry, WalkDir};

-fn is_not_hidden(entry: &DirEntry) -> bool {
-    entry
-        .file_name()
+use crate::checks::CheckCode;
+use crate::settings::{FilePattern, PerFileIgnore};
+
+/// Extract the absolute path and basename (as strings) from a Path.
+fn extract_path_names(path: &Path) -> Result<(&str, &str)> {
+    let file_path = path
        .to_str()
-        .map(|s| (entry.depth() == 0 || !s.starts_with('.')))
-        .unwrap_or(false)
+        .ok_or_else(|| anyhow!("Unable to parse filename: {:?}", path))?;
+    let file_basename = path
+        .file_name()
+        .ok_or_else(|| anyhow!("Unable to parse filename: {:?}", path))?
+        .to_str()
+        .ok_or_else(|| anyhow!("Unable to parse filename: {:?}", path))?;
+    Ok((file_path, file_basename))
 }

-fn is_not_excluded(entry: &DirEntry, exclude: &[Pattern]) -> bool {
-    entry
-        .path()
-        .to_str()
-        .map(|s| !exclude.iter().any(|pattern| pattern.matches(s)))
-        .unwrap_or(false)
+fn is_excluded<'a, T>(file_path: &str, file_basename: &str, exclude: T) -> bool
+where
+    T: Iterator<Item = &'a FilePattern>,
+{
+    for pattern in exclude {
+        match pattern {
+            FilePattern::Simple(basename) => {
+                if *basename == file_basename {
+                    return true;
+                }
+            }
+            FilePattern::Complex(absolute, basename) => {
+                if absolute.matches(file_path) {
+                    return true;
+                }
+                if basename
+                    .as_ref()
+                    .map(|pattern| pattern.matches(file_basename))
+                    .unwrap_or_default()
+                {
+                    return true;
+                }
+            }
+        };
+    }
+    false
+}
+
+fn is_included(path: &Path) -> bool {
+    let file_name = path.to_string_lossy();
+    file_name.ends_with(".py") || file_name.ends_with(".pyi")
 }

 pub fn iter_python_files<'a>(
-    path: &'a PathBuf,
-    exclude: &'a [Pattern],
-) -> impl Iterator<Item = DirEntry> + 'a {
-    WalkDir::new(path)
-        .follow_links(true)
+    path: &'a Path,
+    exclude: &'a [FilePattern],
+    extend_exclude: &'a [FilePattern],
+) -> impl Iterator<Item = Result<DirEntry, walkdir::Error>> + 'a {
+    // Run some checks over the provided patterns, to enable optimizations below.
+    let has_exclude = !exclude.is_empty();
+    let has_extend_exclude = !extend_exclude.is_empty();
+    let exclude_simple = exclude
+        .iter()
+        .all(|pattern| matches!(pattern, FilePattern::Simple(_)));
+    let extend_exclude_simple = extend_exclude
+        .iter()
+        .all(|pattern| matches!(pattern, FilePattern::Simple(_)));
+
+    WalkDir::new(normalize_path(path))
        .into_iter()
-        .filter_entry(|entry| is_not_hidden(entry) && is_not_excluded(entry, exclude))
-        .filter_map(|entry| entry.ok())
-        .filter(|entry| entry.path().to_string_lossy().ends_with(".py"))
+        .filter_entry(move |entry| {
+            if !has_exclude && !has_extend_exclude {
+                return true;
+            }
+
+            let path = entry.path();
+            match extract_path_names(path) {
+                Ok((file_path, file_basename)) => {
+                    let file_type = entry.file_type();
+
+                    if has_exclude
+                        && (!exclude_simple || file_type.is_dir())
+                        && is_excluded(file_path, file_basename, exclude.iter())
+                    {
+                        debug!("Ignored path via `exclude`: {:?}", path);
+                        false
+                    } else if has_extend_exclude
+                        && (!extend_exclude_simple || file_type.is_dir())
+                        && is_excluded(file_path, file_basename, extend_exclude.iter())
+                    {
+                        debug!("Ignored path via `extend-exclude`: {:?}", path);
+                        false
+                    } else {
+                        true
+                    }
+                }
+                Err(_) => {
+                    debug!("Ignored path due to error in parsing: {:?}", path);
+                    true
+                }
+            }
+        })
+        .filter(|entry| {
+            entry.as_ref().map_or(true, |entry| {
+                (entry.depth() == 0 || is_included(entry.path()))
+                    && !entry.file_type().is_dir()
+                    && !(entry.file_type().is_symlink() && entry.path().is_dir())
+            })
+        })
 }

+/// Create tree set with codes matching the pattern/code pairs.
+pub fn ignores_from_path<'a>(
+    path: &Path,
+    pattern_code_pairs: &'a [PerFileIgnore],
+) -> Result<BTreeSet<&'a CheckCode>> {
+    let (file_path, file_basename) = extract_path_names(path)?;
+    Ok(pattern_code_pairs
+        .iter()
+        .filter(|pattern_code_pair| {
+            is_excluded(
+                file_path,
+                file_basename,
+                [&pattern_code_pair.pattern].into_iter(),
+            )
+        })
+        .map(|pattern_code_pair| &pattern_code_pair.code)
+        .collect())
+}
+
+/// Convert any path to an absolute path (based on the current working directory).
+pub fn normalize_path(path: &Path) -> PathBuf {
+    if let Ok(path) = path.absolutize() {
+        return path.to_path_buf();
+    }
+    path.to_path_buf()
+}
+
+/// Convert any path to an absolute path (based on the specified project root).
+pub fn normalize_path_to(path: &Path, project_root: &Path) -> PathBuf {
+    if let Ok(path) = path.absolutize_from(project_root) {
+        return path.to_path_buf();
+    }
+    path.to_path_buf()
+}
+
+/// Convert an absolute path to be relative to the current working directory.
+pub fn relativize_path(path: &Path) -> Cow<str> {
+    if let Ok(path) = path.strip_prefix(path_dedot::CWD.deref()) {
+        return path.to_string_lossy();
+    }
+    path.to_string_lossy()
+}
+
+/// Read a file's contents from disk.
 pub fn read_file(path: &Path) -> Result<String> {
    let file = File::open(path)?;
    let mut buf_reader = BufReader::new(file);
@@ -41,3 +169,100 @@ pub fn read_file(path: &Path) -> Result<String> {
    buf_reader.read_to_string(&mut contents)?;
    Ok(contents)
 }
+
+#[cfg(test)]
+mod tests {
+    use std::path::Path;
+
+    use anyhow::Result;
+    use path_absolutize::Absolutize;
+
+    use crate::fs::{extract_path_names, is_excluded, is_included};
+    use crate::settings::FilePattern;
+
+    #[test]
+    fn inclusions() {
+        let path = Path::new("foo/bar/baz.py").absolutize().unwrap();
+        assert!(is_included(&path));
+
+        let path = Path::new("foo/bar/baz.pyi").absolutize().unwrap();
+        assert!(is_included(&path));
+
+        let path = Path::new("foo/bar/baz.js").absolutize().unwrap();
+        assert!(!is_included(&path));
+
+        let path = Path::new("foo/bar/baz").absolutize().unwrap();
+        assert!(!is_included(&path));
+    }
+
+    #[test]
+    fn exclusions() -> Result<()> {
+        let project_root = Path::new("/tmp/");
+
+        let path = Path::new("foo").absolutize_from(project_root).unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "foo",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(is_excluded(file_path, file_basename, exclude.iter()));
+
+        let path = Path::new("foo/bar").absolutize_from(project_root).unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "bar",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(is_excluded(file_path, file_basename, exclude.iter()));
+
+        let path = Path::new("foo/bar/baz.py")
+            .absolutize_from(project_root)
+            .unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "baz.py",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(is_excluded(file_path, file_basename, exclude.iter()));
+
+        let path = Path::new("foo/bar").absolutize_from(project_root).unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "foo/bar",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(is_excluded(file_path, file_basename, exclude.iter()));
+
+        let path = Path::new("foo/bar/baz.py")
+            .absolutize_from(project_root)
+            .unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "foo/bar/baz.py",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(is_excluded(file_path, file_basename, exclude.iter()));
+
+        let path = Path::new("foo/bar/baz.py")
+            .absolutize_from(project_root)
+            .unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "foo/bar/*.py",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(is_excluded(file_path, file_basename, exclude.iter()));
+
+        let path = Path::new("foo/bar/baz.py")
+            .absolutize_from(project_root)
+            .unwrap();
+        let exclude = vec![FilePattern::from_user(
+            "baz",
+            &Some(project_root.to_path_buf()),
+        )];
+        let (file_path, file_basename) = extract_path_names(&path)?;
+        assert!(!is_excluded(file_path, file_basename, exclude.iter()));
+
+        Ok(())
+    }
+}
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,7 +2,7 @@ extern crate core;

 mod ast;
 mod autofix;
-mod cache;
+pub mod cache;
 pub mod check_ast;
 mod check_lines;
 pub mod checks;
@@ -10,6 +10,8 @@ pub mod fs;
 pub mod linter;
 pub mod logging;
 pub mod message;
-mod pyproject;
+mod noqa;
+pub mod printer;
+pub mod pyproject;
 mod python;
 pub mod settings;
--- a/src/linter.rs
+++ b/src/linter.rs
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,62 +1,97 @@
+extern crate core;
+
+use std::io;
 use std::path::{Path, PathBuf};
 use std::process::ExitCode;
 use std::sync::mpsc::channel;
 use std::time::Instant;

 use anyhow::Result;
-use clap::{Parser, ValueHint};
+use clap::{command, Parser};
 use colored::Colorize;
-use glob::Pattern;
 use log::{debug, error};
 use notify::{raw_watcher, RecursiveMode, Watcher};
 use rayon::prelude::*;
+use regex::Regex;
 use walkdir::DirEntry;

+use ::ruff::cache;
 use ::ruff::checks::CheckCode;
 use ::ruff::checks::CheckKind;
 use ::ruff::fs::iter_python_files;
+use ::ruff::linter::add_noqa_to_path;
 use ::ruff::linter::lint_path;
 use ::ruff::logging::set_up_logging;
 use ::ruff::message::Message;
-use ::ruff::settings::Settings;
+use ::ruff::printer::{Printer, SerializationFormat};
+use ::ruff::pyproject::{self, StrCheckCodePair};
+use ::ruff::settings::{FilePattern, PerFileIgnore, Settings};
 use ::ruff::tell_user;
+use ruff::settings::CurrentSettings;

 const CARGO_PKG_NAME: &str = env!("CARGO_PKG_NAME");
 const CARGO_PKG_VERSION: &str = env!("CARGO_PKG_VERSION");

 #[derive(Debug, Parser)]
-#[clap(name = format!("{CARGO_PKG_NAME} (v{CARGO_PKG_VERSION})"))]
-#[clap(about = "An extremely fast Python linter.", long_about = None)]
+#[command(author, about = "ruff: An extremely fast Python linter.")]
+#[command(version)]
 struct Cli {
-    #[clap(parse(from_os_str), value_hint = ValueHint::AnyPath, required = true)]
+    #[arg(required = true)]
    files: Vec<PathBuf>,
    /// Enable verbose logging.
-    #[clap(short, long, action)]
+    #[arg(short, long)]
    verbose: bool,
    /// Disable all logging (but still exit with status code "1" upon detecting errors).
-    #[clap(short, long, action)]
+    #[arg(short, long)]
    quiet: bool,
    /// Exit with status code "0", even upon detecting errors.
-    #[clap(short, long, action)]
+    #[arg(short, long)]
    exit_zero: bool,
    /// Run in watch mode by re-running whenever files change.
-    #[clap(short, long, action)]
+    #[arg(short, long)]
    watch: bool,
    /// Attempt to automatically fix lint errors.
-    #[clap(short, long, action)]
+    #[arg(short, long)]
    fix: bool,
    /// Disable cache reads.
-    #[clap(short, long, action)]
+    #[arg(short, long)]
    no_cache: bool,
    /// List of error codes to enable.
-    #[clap(long, multiple = true)]
+    #[arg(long, value_delimiter = ',')]
    select: Vec<CheckCode>,
+    /// Like --select, but adds additional error codes on top of the selected ones.
+    #[arg(long, value_delimiter = ',')]
+    extend_select: Vec<CheckCode>,
    /// List of error codes to ignore.
-    #[clap(long, multiple = true)]
+    #[arg(long, value_delimiter = ',')]
    ignore: Vec<CheckCode>,
-    /// List of file and/or directory patterns to exclude from checks.
-    #[clap(long, multiple = true)]
-    exclude: Vec<Pattern>,
+    /// Like --ignore, but adds additional error codes on top of the ignored ones.
+    #[arg(long, value_delimiter = ',')]
+    extend_ignore: Vec<CheckCode>,
+    /// List of paths, used to exclude files and/or directories from checks.
+    #[arg(long, value_delimiter = ',')]
+    exclude: Vec<String>,
+    /// Like --exclude, but adds additional files and directories on top of the excluded ones.
+    #[arg(long, value_delimiter = ',')]
+    extend_exclude: Vec<String>,
+    /// List of mappings from file pattern to code to exclude
+    #[arg(long, value_delimiter = ',')]
+    per_file_ignores: Vec<StrCheckCodePair>,
+    /// Output serialization format for error messages.
+    #[arg(long, value_enum, default_value_t=SerializationFormat::Text)]
+    format: SerializationFormat,
+    /// See the files ruff will be run against with the current settings.
+    #[arg(long)]
+    show_files: bool,
+    /// See ruff's settings.
+    #[arg(long)]
+    show_settings: bool,
+    /// Enable automatic additions of noqa directives to failing lines.
+    #[arg(long)]
+    add_noqa: bool,
+    /// Regular expression matching the name of dummy variables.
+    #[arg(long)]
+    dummy_variable_rgx: Option<Regex>,
 }

 #[cfg(feature = "update-informer")]
@@ -83,6 +118,22 @@ fn check_for_updates() {
    }
 }

+fn show_settings(settings: Settings) {
+    println!("{:#?}", CurrentSettings::from_settings(settings));
+}
+
+fn show_files(files: &[PathBuf], settings: &Settings) {
+    let mut entries: Vec<DirEntry> = files
+        .iter()
+        .flat_map(|path| iter_python_files(path, &settings.exclude, &settings.extend_exclude))
+        .flatten()
+        .collect();
+    entries.sort_by(|a, b| a.path().cmp(b.path()));
+    for entry in entries {
+        println!("{}", entry.path().to_string_lossy());
+    }
+}
+
 fn run_once(
    files: &[PathBuf],
    settings: &Settings,
@@ -91,9 +142,9 @@ fn run_once(
 ) -> Result<Vec<Message>> {
    // Collect all the files to check.
    let start = Instant::now();
-    let paths: Vec<DirEntry> = files
+    let paths: Vec<Result<DirEntry, walkdir::Error>> = files
        .iter()
-        .flat_map(|path| iter_python_files(path, &settings.exclude))
+        .flat_map(|path| iter_python_files(path, &settings.exclude, &settings.extend_exclude))
        .collect();
    let duration = start.elapsed();
    debug!("Identified files to lint in: {:?}", duration);
@@ -102,27 +153,40 @@ fn run_once(
    let mut messages: Vec<Message> = paths
        .par_iter()
        .map(|entry| {
-            lint_path(entry.path(), settings, &cache.into(), &autofix.into()).unwrap_or_else(|e| {
-                error!("Failed to check {}: {e:?}", entry.path().to_string_lossy());
-                vec![]
+            match entry {
+                Ok(entry) => {
+                    let path = entry.path();
+                    lint_path(path, settings, &cache.into(), &autofix.into())
+                        .map_err(|e| (Some(path.to_owned()), e.to_string()))
+                }
+                Err(e) => Err((
+                    e.path().map(Path::to_owned),
+                    e.io_error()
+                        .map_or_else(|| e.to_string(), io::Error::to_string),
+                )),
+            }
+            .unwrap_or_else(|(path, message)| {
+                if let Some(path) = path {
+                    if settings.select.contains(&CheckCode::E902) {
+                        vec![Message {
+                            kind: CheckKind::IOError(message),
+                            fixed: false,
+                            location: Default::default(),
+                            filename: path.to_string_lossy().to_string(),
+                        }]
+                    } else {
+                        error!("Failed to check {}: {message}", path.to_string_lossy());
+                        vec![]
+                    }
+                } else {
+                    error!("{message}");
+                    vec![]
+                }
            })
        })
        .flatten()
        .collect();

-    if settings.select.contains(&CheckCode::E902) {
-        for file in files {
-            if !file.exists() {
-                messages.push(Message {
-                    kind: CheckKind::IOError(file.to_string_lossy().to_string()),
-                    fixed: false,
-                    location: Default::default(),
-                    filename: file.to_string_lossy().to_string(),
-                })
-            }
-        }
-    }
-
    messages.sort_unstable();
    let duration = start.elapsed();
    debug!("Checked files in: {:?}", duration);
@@ -130,52 +194,33 @@ fn run_once(
    Ok(messages)
 }

-fn report_once(messages: &[Message]) -> Result<()> {
-    let (fixed, outstanding): (Vec<&Message>, Vec<&Message>) =
-        messages.iter().partition(|message| message.fixed);
-    let num_fixable = outstanding
+fn add_noqa(files: &[PathBuf], settings: &Settings) -> Result<usize> {
+    // Collect all the files to check.
+    let start = Instant::now();
+    let paths: Vec<Result<DirEntry, walkdir::Error>> = files
        .iter()
-        .filter(|message| message.kind.fixable())
-        .count();
+        .flat_map(|path| iter_python_files(path, &settings.exclude, &settings.extend_exclude))
+        .collect();
+    let duration = start.elapsed();
+    debug!("Identified files to lint in: {:?}", duration);

-    if !outstanding.is_empty() {
-        for message in &outstanding {
-            println!("{}", message);
-        }
-        println!();
-    }
+    let start = Instant::now();
+    let modifications: usize = paths
+        .par_iter()
+        .map(|entry| match entry {
+            Ok(entry) => {
+                let path = entry.path();
+                add_noqa_to_path(path, settings)
+            }
+            Err(_) => Ok(0),
+        })
+        .flatten()
+        .sum();

-    if !fixed.is_empty() {
-        println!(
-            "Found {} error(s) ({} fixed).",
-            outstanding.len(),
-            fixed.len()
-        );
-    } else {
-        println!("Found {} error(s).", outstanding.len());
-    }
+    let duration = start.elapsed();
+    debug!("Added noqa to files in: {:?}", duration);

-    if num_fixable > 0 {
-        println!("{num_fixable} potentially fixable with the --fix option.");
-    }
-
-    Ok(())
-}
-
-fn report_continuously(messages: &[Message]) -> Result<()> {
-    tell_user!(
-        "Found {} error(s). Watching for file changes.",
-        messages.len(),
-    );
-
-    if !messages.is_empty() {
-        println!();
-        for message in messages {
-            println!("{}", message);
-        }
-    }
-
-    Ok(())
+    Ok(modifications)
 }

 fn inner_main() -> Result<ExitCode> {
@@ -183,31 +228,98 @@ fn inner_main() -> Result<ExitCode> {

    set_up_logging(cli.verbose)?;

-    // TODO(charlie): Can we avoid this cast?
-    let paths: Vec<&Path> = cli.files.iter().map(PathBuf::as_path).collect();
-    let mut settings = Settings::from_paths(paths)?;
+    // Find the project root and pyproject.toml.
+    let project_root = pyproject::find_project_root(&cli.files);
+    match &project_root {
+        Some(path) => debug!("Found project root at: {:?}", path),
+        None => debug!("Unable to identify project root; assuming current directory..."),
+    };
+    let pyproject = pyproject::find_pyproject_toml(&project_root);
+    match &pyproject {
+        Some(path) => debug!("Found pyproject.toml at: {:?}", path),
+        None => debug!("Unable to find pyproject.toml; using default settings..."),
+    };
+
+    // Parse the settings from the pyproject.toml and command-line arguments.
+    let exclude: Vec<FilePattern> = cli
+        .exclude
+        .iter()
+        .map(|path| FilePattern::from_user(path, &project_root))
+        .collect();
+    let extend_exclude: Vec<FilePattern> = cli
+        .extend_exclude
+        .iter()
+        .map(|path| FilePattern::from_user(path, &project_root))
+        .collect();
+    let per_file_ignores: Vec<PerFileIgnore> = cli
+        .per_file_ignores
+        .into_iter()
+        .map(|pair| PerFileIgnore::new(pair, &project_root))
+        .collect();
+
+    let mut settings = Settings::from_pyproject(pyproject, project_root)?;
+    if !exclude.is_empty() {
+        settings.exclude = exclude;
+    }
+    if !extend_exclude.is_empty() {
+        settings.extend_exclude = extend_exclude;
+    }
+    if !per_file_ignores.is_empty() {
+        settings.per_file_ignores = per_file_ignores;
+    }
    if !cli.select.is_empty() {
+        settings.clear();
        settings.select(cli.select);
    }
+    if !cli.extend_select.is_empty() {
+        settings.select(cli.extend_select);
+    }
    if !cli.ignore.is_empty() {
        settings.ignore(&cli.ignore);
    }
-    if !cli.exclude.is_empty() {
-        settings.exclude(cli.exclude);
+    if !cli.extend_ignore.is_empty() {
+        settings.ignore(&cli.extend_ignore);
+    }
+    if let Some(dummy_variable_rgx) = cli.dummy_variable_rgx {
+        settings.dummy_variable_rgx = dummy_variable_rgx;
    }

+    if cli.show_settings && cli.show_files {
+        eprintln!("Error: specify --show-settings or show-files (not both).");
+        return Ok(ExitCode::FAILURE);
+    }
+    if cli.show_files {
+        show_files(&cli.files, &settings);
+        return Ok(ExitCode::SUCCESS);
+    }
+    if cli.show_settings {
+        show_settings(settings);
+        return Ok(ExitCode::SUCCESS);
+    }
+
+    cache::init()?;
+
+    let mut printer = Printer::new(cli.format, cli.verbose);
    if cli.watch {
        if cli.fix {
-            println!("Warning: --fix is not enabled in watch mode.")
+            eprintln!("Warning: --fix is not enabled in watch mode.");
+        }
+
+        if cli.add_noqa {
+            eprintln!("Warning: --no-qa is not enabled in watch mode.");
+        }
+
+        if cli.format != SerializationFormat::Text {
+            eprintln!("Warning: --format 'text' is used in watch mode.");
        }

        // Perform an initial run instantly.
-        clearscreen::clear()?;
+        printer.clear_screen()?;
        tell_user!("Starting linter in watch mode...\n");

        let messages = run_once(&cli.files, &settings, !cli.no_cache, false)?;
        if !cli.quiet {
-            report_continuously(&messages)?;
+            printer.write_continuously(&messages)?;
        }

        // Configure the file watcher.
@@ -222,12 +334,12 @@ fn inner_main() -> Result<ExitCode> {
                Ok(e) => {
                    if let Some(path) = e.path {
                        if path.to_string_lossy().ends_with(".py") {
-                            clearscreen::clear()?;
+                            printer.clear_screen()?;
                            tell_user!("File change detected...\n");

                            let messages = run_once(&cli.files, &settings, !cli.no_cache, false)?;
                            if !cli.quiet {
-                                report_continuously(&messages)?;
+                                printer.write_continuously(&messages)?;
                            }
                        }
                    }
@@ -235,10 +347,15 @@ fn inner_main() -> Result<ExitCode> {
                Err(e) => return Err(e.into()),
            }
        }
+    } else if cli.add_noqa {
+        let modifications = add_noqa(&cli.files, &settings)?;
+        if modifications > 0 {
+            println!("Added {modifications} noqa directives.");
+        }
    } else {
        let messages = run_once(&cli.files, &settings, !cli.no_cache, cli.fix)?;
        if !cli.quiet {
-            report_once(&messages)?;
+            printer.write_once(&messages)?;
        }

        #[cfg(feature = "update-informer")]
@@ -255,6 +372,9 @@ fn inner_main() -> Result<ExitCode> {
 fn main() -> ExitCode {
    match inner_main() {
        Ok(code) => code,
-        Err(_) => ExitCode::FAILURE,
+        Err(err) => {
+            eprintln!("{} {:?}", "error".red().bold(), err);
+            ExitCode::FAILURE
+        }
    }
 }
--- a/src/message.rs
+++ b/src/message.rs
@@ -1,11 +1,13 @@
 use std::cmp::Ordering;
 use std::fmt;
+use std::path::Path;

 use colored::Colorize;
 use rustpython_parser::ast::Location;
 use serde::{Deserialize, Serialize};

 use crate::checks::CheckKind;
+use crate::fs::relativize_path;

 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Message {
@@ -36,7 +38,8 @@ impl fmt::Display for Message {
        write!(
            f,
            "{}{}{}{}{}{} {} {}",
-            self.filename.white().bold(),
+            relativize_path(Path::new(&self.filename)).white().bold(),
+            // self.filename.white(),
            ":".cyan(),
            self.location.row(),
            ":".cyan(),
--- a/src/noqa.rs
+++ b/src/noqa.rs
@@ -0,0 +1,281 @@
+use std::cmp::{max, min};
+use std::collections::{BTreeMap, BTreeSet};
+use std::fs;
+use std::path::Path;
+
+use anyhow::Result;
+use once_cell::sync::Lazy;
+use regex::Regex;
+use rustpython_parser::lexer::{LexResult, Tok};
+
+use crate::checks::{Check, CheckCode};
+
+static NO_QA_REGEX: Lazy<Regex> = Lazy::new(|| {
+    Regex::new(r"(?i)(?P<noqa>\s*# noqa(?::\s?(?P<codes>([A-Z]+[0-9]+(?:[,\s]+)?)+))?)")
+        .expect("Invalid regex")
+});
+static SPLIT_COMMA_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"[,\s]").expect("Invalid regex"));
+
+#[derive(Debug)]
+pub enum Directive<'a> {
+    None,
+    All(usize),
+    Codes(usize, Vec<&'a str>),
+}
+
+pub fn extract_noqa_directive(line: &str) -> Directive {
+    match NO_QA_REGEX.captures(line) {
+        Some(caps) => match caps.name("noqa") {
+            Some(noqa) => match caps.name("codes") {
+                Some(codes) => Directive::Codes(
+                    noqa.start(),
+                    SPLIT_COMMA_REGEX
+                        .split(codes.as_str())
+                        .map(|code| code.trim())
+                        .filter(|code| !code.is_empty())
+                        .collect(),
+                ),
+                None => Directive::All(noqa.start()),
+            },
+            None => Directive::None,
+        },
+        None => Directive::None,
+    }
+}
+
+pub fn extract_noqa_line_for(lxr: &[LexResult]) -> Vec<usize> {
+    let mut noqa_line_for: Vec<usize> = vec![];
+
+    let mut last_is_string = false;
+    let mut last_seen = usize::MIN;
+    let mut min_line = usize::MAX;
+    let mut max_line = usize::MIN;
+
+    for (start, tok, end) in lxr.iter().flatten() {
+        if matches!(tok, Tok::EndOfFile) {
+            break;
+        }
+
+        if matches!(tok, Tok::Newline) {
+            min_line = min(min_line, start.row());
+            max_line = max(max_line, start.row());
+
+            // For now, we only care about preserving noqa directives across multi-line strings.
+            if last_is_string {
+                noqa_line_for.extend(vec![max_line; (max_line + 1) - min_line]);
+            } else {
+                for i in (min_line - 1)..(max_line) {
+                    noqa_line_for.push(i + 1);
+                }
+            }
+
+            min_line = usize::MAX;
+            max_line = usize::MIN;
+        } else {
+            // Handle empty lines.
+            if start.row() > last_seen {
+                for i in last_seen..(start.row() - 1) {
+                    noqa_line_for.push(i + 1);
+                }
+            }
+
+            min_line = min(min_line, start.row());
+            max_line = max(max_line, end.row());
+        }
+        last_seen = start.row();
+        last_is_string = matches!(tok, Tok::String { .. });
+    }
+
+    noqa_line_for
+}
+
+fn add_noqa_inner(
+    checks: &Vec<Check>,
+    contents: &str,
+    noqa_line_for: &[usize],
+) -> Result<(usize, String)> {
+    let lines: Vec<&str> = contents.lines().collect();
+    let mut matches_by_line: BTreeMap<usize, BTreeSet<&CheckCode>> = BTreeMap::new();
+    for lineno in 0..lines.len() {
+        let mut codes: BTreeSet<&CheckCode> = BTreeSet::new();
+        for check in checks {
+            if check.location.row() == lineno + 1 {
+                codes.insert(check.kind.code());
+            }
+        }
+
+        // Grab the noqa (logical) line number for the current (physical) line.
+        // If there are newlines at the end of the file, they won't be represented in
+        // `noqa_line_for`, so fallback to the current line.
+        let noqa_lineno = noqa_line_for
+            .get(lineno)
+            .map(|lineno| lineno - 1)
+            .unwrap_or(lineno);
+
+        if !codes.is_empty() {
+            let matches = matches_by_line
+                .entry(noqa_lineno)
+                .or_insert_with(BTreeSet::new);
+            matches.append(&mut codes);
+        }
+    }
+
+    let mut count: usize = 0;
+    let mut output = "".to_string();
+    for (lineno, line) in lines.iter().enumerate() {
+        match matches_by_line.get(&lineno) {
+            None => {
+                output.push_str(line);
+                output.push('\n');
+            }
+            Some(codes) => {
+                match extract_noqa_directive(line) {
+                    Directive::None => {
+                        output.push_str(line);
+                    }
+                    Directive::All(start) => output.push_str(&line[..start]),
+                    Directive::Codes(start, _) => output.push_str(&line[..start]),
+                };
+                let codes: Vec<&str> = codes.iter().map(|code| code.as_str()).collect();
+                output.push_str("  # noqa: ");
+                output.push_str(&codes.join(", "));
+                output.push('\n');
+                count += 1;
+            }
+        }
+    }
+
+    Ok((count, output))
+}
+
+pub fn add_noqa(
+    checks: &Vec<Check>,
+    contents: &str,
+    noqa_line_for: &[usize],
+    path: &Path,
+) -> Result<usize> {
+    let (count, output) = add_noqa_inner(checks, contents, noqa_line_for)?;
+    fs::write(path, output)?;
+    Ok(count)
+}
+
+#[cfg(test)]
+mod tests {
+    use anyhow::Result;
+    use rustpython_parser::ast::Location;
+    use rustpython_parser::lexer;
+    use rustpython_parser::lexer::LexResult;
+
+    use crate::checks::{Check, CheckKind};
+    use crate::noqa::{add_noqa_inner, extract_noqa_line_for};
+
+    #[test]
+    fn extraction() -> Result<()> {
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+y = 2
+z = x + 1",
+        )
+        .collect();
+        println!("{:?}", extract_noqa_line_for(&lxr));
+        assert_eq!(extract_noqa_line_for(&lxr), vec![1, 2, 3]);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "
+x = 1
+y = 2
+z = x + 1",
+        )
+        .collect();
+        println!("{:?}", extract_noqa_line_for(&lxr));
+        assert_eq!(extract_noqa_line_for(&lxr), vec![1, 2, 3, 4]);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+y = 2
+z = x + 1
+        ",
+        )
+        .collect();
+        println!("{:?}", extract_noqa_line_for(&lxr));
+        assert_eq!(extract_noqa_line_for(&lxr), vec![1, 2, 3]);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = 1
+
+y = 2
+z = x + 1
+        ",
+        )
+        .collect();
+        println!("{:?}", extract_noqa_line_for(&lxr));
+        assert_eq!(extract_noqa_line_for(&lxr), vec![1, 2, 3, 4]);
+
+        let lxr: Vec<LexResult> = lexer::make_tokenizer(
+            "x = '''abc
+def
+ghi
+'''
+y = 2
+z = x + 1",
+        )
+        .collect();
+        assert_eq!(extract_noqa_line_for(&lxr), vec![4, 4, 4, 4, 5, 6]);
+
+        Ok(())
+    }
+
+    #[test]
+    fn modification() -> Result<()> {
+        let checks = vec![];
+        let contents = "x = 1";
+        let noqa_line_for = vec![1];
+        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for)?;
+        assert_eq!(count, 0);
+        assert_eq!(output.trim(), contents.trim());
+
+        let checks = vec![Check::new(
+            CheckKind::UnusedVariable("x".to_string()),
+            Location::new(1, 1),
+        )];
+        let contents = "x = 1";
+        let noqa_line_for = vec![1];
+        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for)?;
+        assert_eq!(count, 1);
+        assert_eq!(output.trim(), "x = 1  # noqa: F841".trim());
+
+        let checks = vec![
+            Check::new(
+                CheckKind::AmbiguousVariableName("x".to_string()),
+                Location::new(1, 1),
+            ),
+            Check::new(
+                CheckKind::UnusedVariable("x".to_string()),
+                Location::new(1, 1),
+            ),
+        ];
+        let contents = "x = 1  # noqa: E741";
+        let noqa_line_for = vec![1];
+        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for)?;
+        assert_eq!(count, 1);
+        assert_eq!(output.trim(), "x = 1  # noqa: E741, F841".trim());
+
+        let checks = vec![
+            Check::new(
+                CheckKind::AmbiguousVariableName("x".to_string()),
+                Location::new(1, 1),
+            ),
+            Check::new(
+                CheckKind::UnusedVariable("x".to_string()),
+                Location::new(1, 1),
+            ),
+        ];
+        let contents = "x = 1  # noqa";
+        let noqa_line_for = vec![1];
+        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for)?;
+        assert_eq!(count, 1);
+        assert_eq!(output.trim(), "x = 1  # noqa: E741, F841".trim());
+
+        Ok(())
+    }
+}
--- a/src/printer.rs
+++ b/src/printer.rs
@@ -0,0 +1,108 @@
+use anyhow::Result;
+use clap::ValueEnum;
+use colored::Colorize;
+use rustpython_parser::ast::Location;
+use serde::Serialize;
+
+use crate::checks::{CheckCode, CheckKind};
+use crate::message::Message;
+use crate::tell_user;
+
+#[derive(Clone, Copy, ValueEnum, PartialEq, Eq, Debug)]
+pub enum SerializationFormat {
+    Text,
+    Json,
+}
+
+#[derive(Serialize)]
+struct ExpandedMessage<'a> {
+    kind: &'a CheckKind,
+    code: &'a CheckCode,
+    message: String,
+    fixed: bool,
+    location: Location,
+    filename: &'a String,
+}
+
+pub struct Printer {
+    format: SerializationFormat,
+    verbose: bool,
+}
+
+impl Printer {
+    pub fn new(format: SerializationFormat, verbose: bool) -> Self {
+        Self { format, verbose }
+    }
+
+    pub fn write_once(&mut self, messages: &[Message]) -> Result<()> {
+        let (fixed, outstanding): (Vec<&Message>, Vec<&Message>) =
+            messages.iter().partition(|message| message.fixed);
+        let num_fixable = outstanding
+            .iter()
+            .filter(|message| message.kind.fixable())
+            .count();
+
+        match self.format {
+            SerializationFormat::Json => {
+                println!(
+                    "{}",
+                    serde_json::to_string_pretty(
+                        &messages
+                            .iter()
+                            .map(|m| ExpandedMessage {
+                                kind: &m.kind,
+                                code: m.kind.code(),
+                                message: m.kind.body(),
+                                fixed: m.fixed,
+                                location: m.location,
+                                filename: &m.filename,
+                            })
+                            .collect::<Vec<_>>()
+                    )?
+                )
+            }
+            SerializationFormat::Text => {
+                if !fixed.is_empty() {
+                    println!(
+                        "Found {} error(s) ({} fixed).",
+                        outstanding.len(),
+                        fixed.len()
+                    )
+                } else if !outstanding.is_empty() || self.verbose {
+                    println!("Found {} error(s).", outstanding.len())
+                }
+
+                for message in outstanding {
+                    println!("{}", message)
+                }
+
+                if num_fixable > 0 {
+                    println!("{num_fixable} potentially fixable with the --fix option.")
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn write_continuously(&mut self, messages: &[Message]) -> Result<()> {
+        tell_user!(
+            "Found {} error(s). Watching for file changes.",
+            messages.len(),
+        );
+
+        if !messages.is_empty() {
+            println!();
+            for message in messages {
+                println!("{}", message)
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn clear_screen(&mut self) -> Result<()> {
+        clearscreen::clear()?;
+        Ok(())
+    }
+}
--- a/src/pyproject.rs
+++ b/src/pyproject.rs
@@ -1,36 +1,26 @@
 use std::path::{Path, PathBuf};
+use std::str::FromStr;

-use anyhow::Result;
+use anyhow::{anyhow, Result};
 use common_path::common_path_all;
-use log::debug;
-use serde::Deserialize;
+use path_absolutize::Absolutize;
+use serde::de;
+use serde::{Deserialize, Deserializer};

 use crate::checks::CheckCode;
 use crate::fs;

-pub fn load_config<'a>(paths: impl IntoIterator<Item = &'a Path>) -> Result<(PathBuf, Config)> {
-    match find_project_root(paths) {
-        Some(project_root) => match find_pyproject_toml(&project_root) {
-            Some(path) => {
-                debug!("Found pyproject.toml at: {}", path.to_string_lossy());
-                match parse_pyproject_toml(&path) {
-                    Ok(pyproject) => {
-                        let config = pyproject
-                            .tool
-                            .and_then(|tool| tool.ruff)
-                            .unwrap_or_default();
-                        Ok((project_root, config))
-                    }
-                    Err(e) => {
-                        println!("Failed to load pyproject.toml: {:?}", e);
-                        println!("Falling back to default configuration...");
-                        Ok(Default::default())
-                    }
-                }
-            }
-            None => Ok(Default::default()),
-        },
-        None => Ok(Default::default()),
+pub fn load_config(pyproject: &Option<PathBuf>) -> Result<Config> {
+    match pyproject {
+        Some(pyproject) => Ok(parse_pyproject_toml(pyproject)?
+            .tool
+            .and_then(|tool| tool.ruff)
+            .unwrap_or_default()),
+        None => {
+            eprintln!("No pyproject.toml found.");
+            eprintln!("Falling back to default configuration...");
+            Ok(Default::default())
+        }
    }
 }

@@ -38,9 +28,54 @@ pub fn load_config<'a>(paths: impl IntoIterator<Item = &'a Path>) -> Result<(Pat
 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 pub struct Config {
    pub line_length: Option<usize>,
-    pub exclude: Option<Vec<PathBuf>>,
+    pub exclude: Option<Vec<String>>,
+    pub extend_exclude: Option<Vec<String>>,
    pub select: Option<Vec<CheckCode>>,
    pub ignore: Option<Vec<CheckCode>>,
+    pub per_file_ignores: Option<Vec<StrCheckCodePair>>,
+    pub dummy_variable_rgx: Option<String>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct StrCheckCodePair {
+    pub pattern: String,
+    pub code: CheckCode,
+}
+
+impl StrCheckCodePair {
+    const EXPECTED_PATTERN: &'static str = "<FilePattern>:<CheckCode> pattern";
+}
+
+impl<'de> Deserialize<'de> for StrCheckCodePair {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let str_result = String::deserialize(deserializer)?;
+        Self::from_str(str_result.as_str()).map_err(|_| {
+            de::Error::invalid_value(
+                de::Unexpected::Str(str_result.as_str()),
+                &Self::EXPECTED_PATTERN,
+            )
+        })
+    }
+}
+
+impl FromStr for StrCheckCodePair {
+    type Err = anyhow::Error;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        let (pattern_str, code_string) = {
+            let tokens = string.split(':').collect::<Vec<_>>();
+            if tokens.len() != 2 {
+                return Err(anyhow!("Expected {}", Self::EXPECTED_PATTERN));
+            }
+            (tokens[0], tokens[1])
+        };
+        let code = CheckCode::from_str(code_string)?;
+        let pattern = pattern_str.into();
+        Ok(Self { pattern, code })
+    }
 }

 #[derive(Debug, PartialEq, Eq, Deserialize)]
@@ -58,20 +93,34 @@ fn parse_pyproject_toml(path: &Path) -> Result<PyProject> {
    toml::from_str(&contents).map_err(|e| e.into())
 }

-fn find_pyproject_toml(path: &Path) -> Option<PathBuf> {
-    let path_pyproject_toml = path.join("pyproject.toml");
-    if path_pyproject_toml.is_file() {
-        return Some(path_pyproject_toml);
+pub fn find_pyproject_toml(path: &Option<PathBuf>) -> Option<PathBuf> {
+    if let Some(path) = path {
+        let path_pyproject_toml = path.join("pyproject.toml");
+        if path_pyproject_toml.is_file() {
+            return Some(path_pyproject_toml);
+        }
    }
+
    find_user_pyproject_toml()
 }

 fn find_user_pyproject_toml() -> Option<PathBuf> {
-    dirs::home_dir().map(|path| path.join(".ruff"))
+    let mut path = dirs::config_dir()?;
+    path.push("ruff");
+    path.push("pyproject.toml");
+    if path.is_file() {
+        Some(path)
+    } else {
+        None
+    }
 }

-fn find_project_root<'a>(sources: impl IntoIterator<Item = &'a Path>) -> Option<PathBuf> {
-    if let Some(prefix) = common_path_all(sources) {
+pub fn find_project_root(sources: &[PathBuf]) -> Option<PathBuf> {
+    let absolute_sources: Vec<PathBuf> = sources
+        .iter()
+        .flat_map(|source| source.absolutize().map(|path| path.to_path_buf()))
+        .collect();
+    if let Some(prefix) = common_path_all(absolute_sources.iter().map(PathBuf::as_path)) {
        for directory in prefix.ancestors() {
            if directory.join(".git").is_dir() {
                return Some(directory.to_path_buf());
@@ -90,10 +139,13 @@ fn find_project_root<'a>(sources: impl IntoIterator<Item = &'a Path>) -> Option<

 #[cfg(test)]
 mod tests {
-    use std::path::Path;
+    use std::env::current_dir;
+    use std::path::PathBuf;
+    use std::str::FromStr;

    use anyhow::Result;

+    use super::StrCheckCodePair;
    use crate::checks::CheckCode;
    use crate::pyproject::{
        find_project_root, find_pyproject_toml, parse_pyproject_toml, Config, PyProject, Tools,
@@ -123,8 +175,11 @@ mod tests {
                ruff: Some(Config {
                    line_length: None,
                    exclude: None,
+                    extend_exclude: None,
                    select: None,
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -142,8 +197,11 @@ line-length = 79
                ruff: Some(Config {
                    line_length: Some(79),
                    exclude: None,
+                    extend_exclude: None,
                    select: None,
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -160,9 +218,12 @@ exclude = ["foo.py"]
            Some(Tools {
                ruff: Some(Config {
                    line_length: None,
-                    exclude: Some(vec![Path::new("foo.py").to_path_buf()]),
+                    exclude: Some(vec!["foo.py".to_string()]),
+                    extend_exclude: None,
                    select: None,
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -180,8 +241,11 @@ select = ["E501"]
                ruff: Some(Config {
                    line_length: None,
                    exclude: None,
+                    extend_exclude: None,
                    select: Some(vec![CheckCode::E501]),
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -199,8 +263,11 @@ ignore = ["E501"]
                ruff: Some(Config {
                    line_length: None,
                    exclude: None,
+                    extend_exclude: None,
                    select: None,
                    ignore: Some(vec![CheckCode::E501]),
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -238,12 +305,15 @@ other-attribute = 1

    #[test]
    fn find_and_parse_pyproject_toml() -> Result<()> {
-        let project_root = find_project_root([Path::new("resources/test/fixtures/__init__.py")])
-            .expect("Unable to find project root.");
-        assert_eq!(project_root, Path::new("resources/test/fixtures"));
+        let cwd = current_dir()?;
+        let project_root =
+            find_project_root(&[PathBuf::from("resources/test/fixtures/__init__.py")])
+                .expect("Unable to find project root.");
+        assert_eq!(project_root, cwd.join("resources/test/fixtures"));

-        let path = find_pyproject_toml(&project_root).expect("Unable to find pyproject.toml.");
-        assert_eq!(path, Path::new("resources/test/fixtures/pyproject.toml"));
+        let path =
+            find_pyproject_toml(&Some(project_root)).expect("Unable to find pyproject.toml.");
+        assert_eq!(path, cwd.join("resources/test/fixtures/pyproject.toml"));

        let pyproject = parse_pyproject_toml(&path)?;
        let config = pyproject
@@ -254,44 +324,37 @@ other-attribute = 1
            config,
            Config {
                line_length: Some(88),
-                exclude: Some(vec![
-                    Path::new("excluded.py").to_path_buf(),
-                    Path::new("**/migrations").to_path_buf()
-                ]),
-                select: Some(vec![
-                    CheckCode::E402,
-                    CheckCode::E501,
-                    CheckCode::E711,
-                    CheckCode::E712,
-                    CheckCode::E713,
-                    CheckCode::E714,
-                    CheckCode::E731,
-                    CheckCode::E902,
-                    CheckCode::F401,
-                    CheckCode::F403,
-                    CheckCode::F541,
-                    CheckCode::F601,
-                    CheckCode::F602,
-                    CheckCode::F621,
-                    CheckCode::F622,
-                    CheckCode::F631,
-                    CheckCode::F634,
-                    CheckCode::F704,
-                    CheckCode::F706,
-                    CheckCode::F707,
-                    CheckCode::F821,
-                    CheckCode::F822,
-                    CheckCode::F823,
-                    CheckCode::F831,
-                    CheckCode::F841,
-                    CheckCode::F901,
-                    CheckCode::R001,
-                    CheckCode::R002,
+                exclude: None,
+                extend_exclude: Some(vec![
+                    "excluded.py".to_string(),
+                    "migrations".to_string(),
+                    "directory/also_excluded.py".to_string(),
                ]),
+                select: None,
                ignore: None,
+                per_file_ignores: None,
+                dummy_variable_rgx: None,
            }
        );

        Ok(())
    }
+
+    #[test]
+    fn str_check_code_pair_strings() {
+        let result = StrCheckCodePair::from_str("foo:E501");
+        assert!(result.is_ok());
+        let result = StrCheckCodePair::from_str("E501:foo");
+        assert!(result.is_err());
+        let result = StrCheckCodePair::from_str("E501");
+        assert!(result.is_err());
+        let result = StrCheckCodePair::from_str("foo");
+        assert!(result.is_err());
+        let result = StrCheckCodePair::from_str("foo:E501:E402");
+        assert!(result.is_err());
+        let result = StrCheckCodePair::from_str("**/bar:E501");
+        assert!(result.is_ok());
+        let result = StrCheckCodePair::from_str("bar:E502");
+        assert!(result.is_err());
+    }
 }
--- a/src/python.rs
+++ b/src/python.rs
@@ -1,2 +1,3 @@
 pub mod builtins;
+pub mod future;
 pub mod typing;
--- a/src/python/future.rs
+++ b/src/python/future.rs
@@ -0,0 +1,13 @@
+/// A copy of `__future__.all_feature_names`.
+pub const ALL_FEATURE_NAMES: &[&str] = &[
+    "nested_scopes",
+    "generators",
+    "division",
+    "absolute_import",
+    "with_statement",
+    "print_function",
+    "unicode_literals",
+    "barry_as_FLUFL",
+    "generator_stop",
+    "annotations",
+];
--- a/src/python/typing.rs
+++ b/src/python/typing.rs
@@ -1,8 +1,9 @@
-use lazy_static::lazy_static;
 use std::collections::BTreeSet;

-lazy_static! {
-    static ref ANNOTATED_SUBSCRIPTS: BTreeSet<&'static str> = BTreeSet::from([
+use once_cell::sync::Lazy;
+
+static ANNOTATED_SUBSCRIPTS: Lazy<BTreeSet<&'static str>> = Lazy::new(|| {
+    BTreeSet::from([
        "AbstractAsyncContextManager",
        "AbstractContextManager",
        "AbstractSet",
@@ -80,8 +81,8 @@ lazy_static! {
        "set",
        "tuple",
        "type",
-    ]);
-}
+    ])
+});

 pub fn is_annotated_subscript(name: &str) -> bool {
    ANNOTATED_SUBSCRIPTS.contains(name)
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -1,80 +1,182 @@
 use std::collections::BTreeSet;
 use std::hash::{Hash, Hasher};
-use std::path::Path;
+use std::path::{Path, PathBuf};

-use anyhow::Result;
+use anyhow::{anyhow, Result};
 use glob::Pattern;
+use once_cell::sync::Lazy;
+use regex::Regex;

-use crate::checks::CheckCode;
-use crate::pyproject::load_config;
+use crate::checks::{CheckCode, DEFAULT_CHECK_CODES};
+use crate::fs;
+use crate::pyproject::{load_config, StrCheckCodePair};
+
+#[derive(Debug, Clone, Hash)]
+pub enum FilePattern {
+    Simple(&'static str),
+    Complex(Pattern, Option<Pattern>),
+}
+
+impl FilePattern {
+    pub fn from_user(pattern: &str, project_root: &Option<PathBuf>) -> Self {
+        let path = Path::new(pattern);
+        let absolute_path = match project_root {
+            Some(project_root) => fs::normalize_path_to(path, project_root),
+            None => fs::normalize_path(path),
+        };
+
+        let absolute = Pattern::new(&absolute_path.to_string_lossy()).expect("Invalid pattern.");
+        let basename = if !pattern.contains(std::path::MAIN_SEPARATOR) {
+            Some(Pattern::new(pattern).expect("Invalid pattern."))
+        } else {
+            None
+        };
+
+        FilePattern::Complex(absolute, basename)
+    }
+}
+
+#[derive(Debug, Clone, Hash)]
+pub struct PerFileIgnore {
+    pub pattern: FilePattern,
+    pub code: CheckCode,
+}
+
+impl PerFileIgnore {
+    pub fn new(user_in: StrCheckCodePair, project_root: &Option<PathBuf>) -> Self {
+        let pattern = FilePattern::from_user(user_in.pattern.as_str(), project_root);
+        let code = user_in.code;
+        Self { pattern, code }
+    }
+}

 #[derive(Debug)]
 pub struct Settings {
+    pub pyproject: Option<PathBuf>,
+    pub project_root: Option<PathBuf>,
    pub line_length: usize,
-    pub exclude: Vec<Pattern>,
+    pub exclude: Vec<FilePattern>,
+    pub extend_exclude: Vec<FilePattern>,
    pub select: BTreeSet<CheckCode>,
+    pub per_file_ignores: Vec<PerFileIgnore>,
+    pub dummy_variable_rgx: Regex,
+}
+
+impl Settings {
+    pub fn for_rule(check_code: CheckCode) -> Self {
+        Self {
+            pyproject: None,
+            project_root: None,
+            line_length: 88,
+            exclude: vec![],
+            extend_exclude: vec![],
+            select: BTreeSet::from([check_code]),
+            per_file_ignores: vec![],
+            dummy_variable_rgx: DEFAULT_DUMMY_VARIABLE_RGX.clone(),
+        }
+    }
+
+    pub fn for_rules(check_codes: Vec<CheckCode>) -> Self {
+        Self {
+            pyproject: None,
+            project_root: None,
+            line_length: 88,
+            exclude: vec![],
+            extend_exclude: vec![],
+            select: BTreeSet::from_iter(check_codes),
+            per_file_ignores: vec![],
+            dummy_variable_rgx: DEFAULT_DUMMY_VARIABLE_RGX.clone(),
+        }
+    }
 }

 impl Hash for Settings {
    fn hash<H: Hasher>(&self, state: &mut H) {
        self.line_length.hash(state);
+        self.dummy_variable_rgx.as_str().hash(state);
        for value in self.select.iter() {
            value.hash(state);
        }
+        for value in self.per_file_ignores.iter() {
+            value.hash(state);
+        }
    }
 }

+static DEFAULT_EXCLUDE: Lazy<Vec<FilePattern>> = Lazy::new(|| {
+    vec![
+        FilePattern::Simple(".bzr"),
+        FilePattern::Simple(".direnv"),
+        FilePattern::Simple(".eggs"),
+        FilePattern::Simple(".git"),
+        FilePattern::Simple(".hg"),
+        FilePattern::Simple(".mypy_cache"),
+        FilePattern::Simple(".nox"),
+        FilePattern::Simple(".pants.d"),
+        FilePattern::Simple(".ruff_cache"),
+        FilePattern::Simple(".svn"),
+        FilePattern::Simple(".tox"),
+        FilePattern::Simple(".venv"),
+        FilePattern::Simple("__pypackages__"),
+        FilePattern::Simple("_build"),
+        FilePattern::Simple("buck-out"),
+        FilePattern::Simple("build"),
+        FilePattern::Simple("dist"),
+        FilePattern::Simple("node_modules"),
+        FilePattern::Simple("venv"),
+    ]
+});
+
+static DEFAULT_DUMMY_VARIABLE_RGX: Lazy<Regex> =
+    Lazy::new(|| Regex::new("^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$").unwrap());
+
 impl Settings {
-    pub fn from_paths<'a>(paths: impl IntoIterator<Item = &'a Path>) -> Result<Self> {
-        let (project_root, config) = load_config(paths)?;
+    pub fn from_pyproject(
+        pyproject: Option<PathBuf>,
+        project_root: Option<PathBuf>,
+    ) -> Result<Self> {
+        let config = load_config(&pyproject)?;
        let mut settings = Settings {
            line_length: config.line_length.unwrap_or(88),
            exclude: config
                .exclude
-                .unwrap_or_default()
-                .into_iter()
-                .map(|path| {
-                    if path.is_relative() {
-                        project_root.join(path)
-                    } else {
-                        path
-                    }
+                .map(|paths| {
+                    paths
+                        .iter()
+                        .map(|path| FilePattern::from_user(path, &project_root))
+                        .collect()
                })
-                .map(|path| Pattern::new(&path.to_string_lossy()).expect("Invalid pattern."))
-                .collect(),
-            select: BTreeSet::from_iter(config.select.unwrap_or_else(|| {
-                vec![
-                    CheckCode::E402,
-                    CheckCode::E501,
-                    CheckCode::E711,
-                    CheckCode::E712,
-                    CheckCode::E713,
-                    CheckCode::E714,
-                    CheckCode::E731,
-                    CheckCode::E902,
-                    CheckCode::F401,
-                    CheckCode::F403,
-                    CheckCode::F541,
-                    CheckCode::F601,
-                    CheckCode::F602,
-                    CheckCode::F621,
-                    CheckCode::F622,
-                    CheckCode::F631,
-                    CheckCode::F634,
-                    CheckCode::F704,
-                    CheckCode::F706,
-                    CheckCode::F707,
-                    CheckCode::F821,
-                    CheckCode::F822,
-                    CheckCode::F823,
-                    CheckCode::F831,
-                    CheckCode::F841,
-                    CheckCode::F901,
-                    // Disable refactoring codes by default.
-                    // CheckCode::R001,
-                    // CheckCode::R002,
-                ]
-            })),
+                .unwrap_or_else(|| DEFAULT_EXCLUDE.clone()),
+            extend_exclude: config
+                .extend_exclude
+                .map(|paths| {
+                    paths
+                        .iter()
+                        .map(|path| FilePattern::from_user(path, &project_root))
+                        .collect()
+                })
+                .unwrap_or_default(),
+            select: if let Some(select) = config.select {
+                BTreeSet::from_iter(select)
+            } else {
+                BTreeSet::from_iter(DEFAULT_CHECK_CODES)
+            },
+            per_file_ignores: config
+                .per_file_ignores
+                .map(|ignore_strings| {
+                    ignore_strings
+                        .into_iter()
+                        .map(|pair| PerFileIgnore::new(pair, &project_root))
+                        .collect()
+                })
+                .unwrap_or_default(),
+            dummy_variable_rgx: match config.dummy_variable_rgx {
+                Some(pattern) => Regex::new(&pattern)
+                    .map_err(|e| anyhow!("Invalid dummy-variable-rgx value: {e}"))?,
+                None => DEFAULT_DUMMY_VARIABLE_RGX.clone(),
+            },
+            pyproject,
+            project_root,
        };
        if let Some(ignore) = &config.ignore {
            settings.ignore(ignore);
@@ -82,8 +184,11 @@ impl Settings {
        Ok(settings)
    }

-    pub fn select(&mut self, codes: Vec<CheckCode>) {
+    pub fn clear(&mut self) {
        self.select.clear();
+    }
+
+    pub fn select(&mut self, codes: Vec<CheckCode>) {
        for code in codes {
            self.select.insert(code);
        }
@@ -94,8 +199,63 @@ impl Settings {
            self.select.remove(code);
        }
    }
+}

-    pub fn exclude(&mut self, exclude: Vec<Pattern>) {
-        self.exclude = exclude;
+/// Struct to render user-facing exclusion patterns.
+#[derive(Debug)]
+#[allow(dead_code)]
+pub struct Exclusion {
+    basename: Option<String>,
+    absolute: Option<String>,
+}
+
+impl Exclusion {
+    pub fn from_file_pattern(file_pattern: FilePattern) -> Self {
+        match file_pattern {
+            FilePattern::Simple(basename) => Exclusion {
+                basename: Some(basename.to_string()),
+                absolute: None,
+            },
+            FilePattern::Complex(absolute, basename) => Exclusion {
+                basename: basename.map(|pattern| pattern.to_string()),
+                absolute: Some(absolute.to_string()),
+            },
+        }
+    }
+}
+
+/// Struct to render user-facing Settings.
+#[derive(Debug)]
+pub struct CurrentSettings {
+    pub pyproject: Option<PathBuf>,
+    pub project_root: Option<PathBuf>,
+    pub line_length: usize,
+    pub exclude: Vec<Exclusion>,
+    pub extend_exclude: Vec<Exclusion>,
+    pub select: BTreeSet<CheckCode>,
+    pub per_file_ignores: Vec<PerFileIgnore>,
+    pub dummy_variable_rgx: Regex,
+}
+
+impl CurrentSettings {
+    pub fn from_settings(settings: Settings) -> Self {
+        Self {
+            pyproject: settings.pyproject,
+            project_root: settings.project_root,
+            line_length: settings.line_length,
+            exclude: settings
+                .exclude
+                .into_iter()
+                .map(Exclusion::from_file_pattern)
+                .collect(),
+            extend_exclude: settings
+                .extend_exclude
+                .into_iter()
+                .map(Exclusion::from_file_pattern)
+                .collect(),
+            select: settings.select,
+            per_file_ignores: settings.per_file_ignores,
+            dummy_variable_rgx: settings.dummy_variable_rgx,
+        }
    }
 }
--- a/src/snapshots/rufflintertests__a001.snap
+++ b/src/snapshots/rufflintertests__a001.snap
@@ -0,0 +1,112 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    BuiltinVariableShadowing: sum
+  location:
+    row: 1
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: int
+  location:
+    row: 2
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: print
+  location:
+    row: 4
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: copyright
+  location:
+    row: 5
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: complex
+  location:
+    row: 6
+    column: 2
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: float
+  location:
+    row: 7
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: object
+  location:
+    row: 7
+    column: 9
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: min
+  location:
+    row: 8
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: max
+  location:
+    row: 8
+    column: 6
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: bytes
+  location:
+    row: 10
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: slice
+  location:
+    row: 13
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: ValueError
+  location:
+    row: 18
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: memoryview
+  location:
+    row: 21
+    column: 5
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: bytearray
+  location:
+    row: 21
+    column: 18
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: str
+  location:
+    row: 24
+    column: 22
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: all
+  location:
+    row: 24
+    column: 45
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: any
+  location:
+    row: 24
+    column: 50
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: sum
+  location:
+    row: 27
+    column: 8
+  fix: ~
--- a/src/snapshots/rufflintertests__a002.snap
+++ b/src/snapshots/rufflintertests__a002.snap
@@ -0,0 +1,46 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    BuiltinArgumentShadowing: str
+  location:
+    row: 1
+    column: 11
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: type
+  location:
+    row: 1
+    column: 19
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: complex
+  location:
+    row: 1
+    column: 26
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: Exception
+  location:
+    row: 1
+    column: 35
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: getattr
+  location:
+    row: 1
+    column: 48
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: bytes
+  location:
+    row: 5
+    column: 17
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: float
+  location:
+    row: 9
+    column: 16
+  fix: ~
--- a/src/snapshots/rufflintertests__a003.snap
+++ b/src/snapshots/rufflintertests__a003.snap
@@ -0,0 +1,18 @@
+---
+source: src/linter.rs
+assertion_line: 762
+expression: checks
+---
+- kind:
+    BuiltinAttributeShadowing: ImportError
+  location:
+    row: 2
+    column: 5
+  fix: ~
+- kind:
+    BuiltinAttributeShadowing: str
+  location:
+    row: 7
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e402.snap
+++ b/src/snapshots/rufflintertests__e402.snap
@@ -0,0 +1,10 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: ModuleImportNotAtTopOfFile
+  location:
+    row: 20
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e501.snap
+++ b/src/snapshots/rufflintertests__e501.snap
@@ -0,0 +1,13 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    LineTooLong:
+      - 123
+      - 88
+  location:
+    row: 5
+    column: 89
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e711.snap
+++ b/src/snapshots/rufflintertests__e711.snap
@@ -0,0 +1,53 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    NoneComparison: Eq
+  location:
+    row: 2
+    column: 11
+  fix: ~
+- kind:
+    NoneComparison: NotEq
+  location:
+    row: 5
+    column: 11
+  fix: ~
+- kind:
+    NoneComparison: Eq
+  location:
+    row: 8
+    column: 4
+  fix: ~
+- kind:
+    NoneComparison: NotEq
+  location:
+    row: 11
+    column: 4
+  fix: ~
+- kind:
+    NoneComparison: Eq
+  location:
+    row: 14
+    column: 14
+  fix: ~
+- kind:
+    NoneComparison: NotEq
+  location:
+    row: 17
+    column: 14
+  fix: ~
+- kind:
+    NoneComparison: NotEq
+  location:
+    row: 20
+    column: 4
+  fix: ~
+- kind:
+    NoneComparison: Eq
+  location:
+    row: 23
+    column: 4
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e712.snap
+++ b/src/snapshots/rufflintertests__e712.snap
@@ -0,0 +1,77 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    TrueFalseComparison:
+      - true
+      - Eq
+  location:
+    row: 2
+    column: 11
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - false
+      - NotEq
+  location:
+    row: 5
+    column: 11
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - true
+      - NotEq
+  location:
+    row: 8
+    column: 4
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - false
+      - Eq
+  location:
+    row: 11
+    column: 4
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - true
+      - Eq
+  location:
+    row: 14
+    column: 14
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - false
+      - NotEq
+  location:
+    row: 17
+    column: 14
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - true
+      - Eq
+  location:
+    row: 20
+    column: 20
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - false
+      - Eq
+  location:
+    row: 20
+    column: 44
+  fix: ~
+- kind:
+    TrueFalseComparison:
+      - true
+      - Eq
+  location:
+    row: 22
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e713.snap
+++ b/src/snapshots/rufflintertests__e713.snap
@@ -0,0 +1,30 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: NotInTest
+  location:
+    row: 2
+    column: 10
+  fix: ~
+- kind: NotInTest
+  location:
+    row: 5
+    column: 12
+  fix: ~
+- kind: NotInTest
+  location:
+    row: 8
+    column: 10
+  fix: ~
+- kind: NotInTest
+  location:
+    row: 11
+    column: 25
+  fix: ~
+- kind: NotInTest
+  location:
+    row: 14
+    column: 11
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e714.snap
+++ b/src/snapshots/rufflintertests__e714.snap
@@ -0,0 +1,20 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: NotIsTest
+  location:
+    row: 2
+    column: 10
+  fix: ~
+- kind: NotIsTest
+  location:
+    row: 5
+    column: 12
+  fix: ~
+- kind: NotIsTest
+  location:
+    row: 8
+    column: 10
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e721.snap
+++ b/src/snapshots/rufflintertests__e721.snap
@@ -0,0 +1,85 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: TypeComparison
+  location:
+    row: 2
+    column: 14
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 5
+    column: 14
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 10
+    column: 8
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 15
+    column: 14
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 18
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 18
+    column: 46
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 20
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 22
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 24
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 26
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 28
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 30
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 32
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 34
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 40
+    column: 18
+  fix: ~
+- kind: TypeComparison
+  location:
+    row: 42
+    column: 18
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e722.snap
+++ b/src/snapshots/rufflintertests__e722.snap
@@ -0,0 +1,20 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: DoNotUseBareExcept
+  location:
+    row: 4
+    column: 1
+  fix: ~
+- kind: DoNotUseBareExcept
+  location:
+    row: 11
+    column: 1
+  fix: ~
+- kind: DoNotUseBareExcept
+  location:
+    row: 16
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e731.snap
+++ b/src/snapshots/rufflintertests__e731.snap
@@ -0,0 +1,30 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: DoNotAssignLambda
+  location:
+    row: 2
+    column: 1
+  fix: ~
+- kind: DoNotAssignLambda
+  location:
+    row: 4
+    column: 1
+  fix: ~
+- kind: DoNotAssignLambda
+  location:
+    row: 7
+    column: 5
+  fix: ~
+- kind: DoNotAssignLambda
+  location:
+    row: 12
+    column: 1
+  fix: ~
+- kind: DoNotAssignLambda
+  location:
+    row: 16
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e741.snap
+++ b/src/snapshots/rufflintertests__e741.snap
@@ -0,0 +1,155 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 3
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousVariableName: I
+  location:
+    row: 4
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousVariableName: O
+  location:
+    row: 5
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 6
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 8
+    column: 4
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 9
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 10
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 11
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 16
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 20
+    column: 8
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 25
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 26
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 30
+    column: 5
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 33
+    column: 9
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 34
+    column: 9
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 40
+    column: 8
+  fix: ~
+- kind:
+    AmbiguousVariableName: I
+  location:
+    row: 40
+    column: 14
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 44
+    column: 8
+  fix: ~
+- kind:
+    AmbiguousVariableName: I
+  location:
+    row: 44
+    column: 16
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 48
+    column: 9
+  fix: ~
+- kind:
+    AmbiguousVariableName: I
+  location:
+    row: 48
+    column: 14
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 57
+    column: 16
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 66
+    column: 20
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 71
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousVariableName: l
+  location:
+    row: 74
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e742.snap
+++ b/src/snapshots/rufflintertests__e742.snap
@@ -0,0 +1,23 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    AmbiguousClassName: l
+  location:
+    row: 1
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousClassName: I
+  location:
+    row: 5
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousClassName: O
+  location:
+    row: 9
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e743.snap
+++ b/src/snapshots/rufflintertests__e743.snap
@@ -0,0 +1,23 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    AmbiguousFunctionName: l
+  location:
+    row: 1
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousFunctionName: I
+  location:
+    row: 5
+    column: 1
+  fix: ~
+- kind:
+    AmbiguousFunctionName: O
+  location:
+    row: 10
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e999.snap
+++ b/src/snapshots/rufflintertests__e999.snap
@@ -0,0 +1,11 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    SyntaxError: Got unexpected EOF
+  location:
+    row: 2
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f401.snap
+++ b/src/snapshots/rufflintertests__f401.snap
@@ -0,0 +1,23 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    UnusedImport: functools
+  location:
+    row: 3
+    column: 1
+  fix: ~
+- kind:
+    UnusedImport: collections.OrderedDict
+  location:
+    row: 5
+    column: 1
+  fix: ~
+- kind:
+    UnusedImport: logging.handlers
+  location:
+    row: 13
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f402.snap
+++ b/src/snapshots/rufflintertests__f402.snap
@@ -0,0 +1,21 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ImportShadowedByLoopVar:
+      - os
+      - 1
+  location:
+    row: 5
+    column: 5
+  fix: ~
+- kind:
+    ImportShadowedByLoopVar:
+      - path
+      - 2
+  location:
+    row: 8
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f403.snap
+++ b/src/snapshots/rufflintertests__f403.snap
@@ -0,0 +1,17 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ImportStarUsed: F634
+  location:
+    row: 1
+    column: 1
+  fix: ~
+- kind:
+    ImportStarUsed: F634
+  location:
+    row: 2
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f404.snap
+++ b/src/snapshots/rufflintertests__f404.snap
@@ -0,0 +1,10 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: LateFutureImport
+  location:
+    row: 7
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f405.snap
+++ b/src/snapshots/rufflintertests__f405.snap
@@ -0,0 +1,21 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ImportStarUsage:
+      - name
+      - mymodule
+  location:
+    row: 5
+    column: 11
+  fix: ~
+- kind:
+    ImportStarUsage:
+      - a
+      - mymodule
+  location:
+    row: 11
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f406.snap
+++ b/src/snapshots/rufflintertests__f406.snap
@@ -0,0 +1,17 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ImportStarNotPermitted: F634
+  location:
+    row: 5
+    column: 5
+  fix: ~
+- kind:
+    ImportStarNotPermitted: F634
+  location:
+    row: 9
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f407.snap
+++ b/src/snapshots/rufflintertests__f407.snap
@@ -0,0 +1,11 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    FutureFeatureNotDefined: non_existent_feature
+  location:
+    row: 2
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f541.snap
+++ b/src/snapshots/rufflintertests__f541.snap
@@ -0,0 +1,20 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: FStringMissingPlaceholders
+  location:
+    row: 4
+    column: 7
+  fix: ~
+- kind: FStringMissingPlaceholders
+  location:
+    row: 5
+    column: 7
+  fix: ~
+- kind: FStringMissingPlaceholders
+  location:
+    row: 7
+    column: 7
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f601.snap
+++ b/src/snapshots/rufflintertests__f601.snap
@@ -0,0 +1,20 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: MultiValueRepeatedKeyLiteral
+  location:
+    row: 3
+    column: 6
+  fix: ~
+- kind: MultiValueRepeatedKeyLiteral
+  location:
+    row: 9
+    column: 5
+  fix: ~
+- kind: MultiValueRepeatedKeyLiteral
+  location:
+    row: 11
+    column: 7
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f602.snap
+++ b/src/snapshots/rufflintertests__f602.snap
@@ -0,0 +1,11 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    MultiValueRepeatedKeyVariable: a
+  location:
+    row: 5
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f622.snap
+++ b/src/snapshots/rufflintertests__f622.snap
@@ -0,0 +1,10 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: TwoStarredExpressions
+  location:
+    row: 1
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f631.snap
+++ b/src/snapshots/rufflintertests__f631.snap
@@ -0,0 +1,15 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: AssertTuple
+  location:
+    row: 1
+    column: 1
+  fix: ~
+- kind: AssertTuple
+  location:
+    row: 2
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f632.snap
+++ b/src/snapshots/rufflintertests__f632.snap
@@ -0,0 +1,15 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: IsLiteral
+  location:
+    row: 1
+    column: 6
+  fix: ~
+- kind: IsLiteral
+  location:
+    row: 4
+    column: 8
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f633.snap
+++ b/src/snapshots/rufflintertests__f633.snap
@@ -0,0 +1,10 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: InvalidPrintSyntax
+  location:
+    row: 4
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f634.snap
+++ b/src/snapshots/rufflintertests__f634.snap
@@ -0,0 +1,15 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: IfTuple
+  location:
+    row: 1
+    column: 1
+  fix: ~
+- kind: IfTuple
+  location:
+    row: 7
+    column: 5
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f701.snap
+++ b/src/snapshots/rufflintertests__f701.snap
@@ -0,0 +1,25 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: BreakOutsideLoop
+  location:
+    row: 4
+    column: 5
+  fix: ~
+- kind: BreakOutsideLoop
+  location:
+    row: 16
+    column: 5
+  fix: ~
+- kind: BreakOutsideLoop
+  location:
+    row: 20
+    column: 5
+  fix: ~
+- kind: BreakOutsideLoop
+  location:
+    row: 23
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f702.snap
+++ b/src/snapshots/rufflintertests__f702.snap
@@ -0,0 +1,25 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: ContinueOutsideLoop
+  location:
+    row: 4
+    column: 5
+  fix: ~
+- kind: ContinueOutsideLoop
+  location:
+    row: 16
+    column: 5
+  fix: ~
+- kind: ContinueOutsideLoop
+  location:
+    row: 20
+    column: 5
+  fix: ~
+- kind: ContinueOutsideLoop
+  location:
+    row: 23
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f704.snap
+++ b/src/snapshots/rufflintertests__f704.snap
@@ -0,0 +1,20 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: YieldOutsideFunction
+  location:
+    row: 6
+    column: 5
+  fix: ~
+- kind: YieldOutsideFunction
+  location:
+    row: 9
+    column: 1
+  fix: ~
+- kind: YieldOutsideFunction
+  location:
+    row: 10
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f706.snap
+++ b/src/snapshots/rufflintertests__f706.snap
@@ -0,0 +1,15 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: ReturnOutsideFunction
+  location:
+    row: 6
+    column: 5
+  fix: ~
+- kind: ReturnOutsideFunction
+  location:
+    row: 9
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f707.snap
+++ b/src/snapshots/rufflintertests__f707.snap
@@ -0,0 +1,20 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: DefaultExceptNotLast
+  location:
+    row: 3
+    column: 1
+  fix: ~
+- kind: DefaultExceptNotLast
+  location:
+    row: 10
+    column: 1
+  fix: ~
+- kind: DefaultExceptNotLast
+  location:
+    row: 19
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f722.snap
+++ b/src/snapshots/rufflintertests__f722.snap
@@ -0,0 +1,11 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ForwardAnnotationSyntaxError: ///
+  location:
+    row: 9
+    column: 13
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f821.snap
+++ b/src/snapshots/rufflintertests__f821.snap
@@ -0,0 +1,53 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    UndefinedName: self
+  location:
+    row: 2
+    column: 12
+  fix: ~
+- kind:
+    UndefinedName: self
+  location:
+    row: 6
+    column: 13
+  fix: ~
+- kind:
+    UndefinedName: self
+  location:
+    row: 10
+    column: 9
+  fix: ~
+- kind:
+    UndefinedName: numeric_string
+  location:
+    row: 21
+    column: 12
+  fix: ~
+- kind:
+    UndefinedName: Bar
+  location:
+    row: 58
+    column: 5
+  fix: ~
+- kind:
+    UndefinedName: TOMATO
+  location:
+    row: 83
+    column: 11
+  fix: ~
+- kind:
+    UndefinedName: B
+  location:
+    row: 87
+    column: 7
+  fix: ~
+- kind:
+    UndefinedName: B
+  location:
+    row: 89
+    column: 7
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f822.snap
+++ b/src/snapshots/rufflintertests__f822.snap
@@ -0,0 +1,11 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    UndefinedExport: b
+  location:
+    row: 3
+    column: 1
+  fix: ~
+
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Charlie Marsh	6fef4db433	Bump version to 0.0.48	2022-09-29 16:40:01 -04:00
Charlie Marsh	7470d6832f	Add pattern matching limitation to README.md	2022-09-29 16:39:25 -04:00
Nikita Sobolev	63ba0bfeef	Adds flake8-builtins (#284 )	2022-09-29 16:37:43 -04:00
Anders Kaseorg	91666fcaf6	Don’t follow directory symlinks found while walking (#280 )	2022-09-29 15:10:25 -04:00
Heyward Fann	643e27221d	chore: fix eslint fix link (#281 )	2022-09-29 07:15:07 -04:00
Charlie Marsh	c7349b69c1	Bump version to 0.0.47	2022-09-28 22:30:48 -04:00
Charlie Marsh	7f84753f3c	Improve rendering of --show-settings	2022-09-28 22:30:20 -04:00
Charlie Marsh	e2ec62cf33	Misc. follow-up changes to #272 (#278 )	2022-09-28 22:15:58 -04:00
Charlie Marsh	1d5592d937	Use take-while to terminate on parse errors (#279 )	2022-09-28 22:06:35 -04:00
Anders Kaseorg	886def13bd	Upgrade to clap 4 (#272 )	2022-09-28 17:11:57 -04:00
Charlie Marsh	949e4d4077	Bump version to 0.0.46	2022-09-24 13:10:10 -04:00
Charlie Marsh	c8cb2eead2	Remove README note about noqa patterns	2022-09-24 13:09:45 -04:00
Seamooo	02ae494a0e	Enable per-file ignores (#261 )	2022-09-24 13:02:34 -04:00
Harutaka Kawamura	dce86e065b	Make unused variable pattern configurable (#265 )	2022-09-24 10:43:39 -04:00
Harutaka Kawamura	d77979429c	Print warning and error messages in stderr (#267 )	2022-09-24 09:27:35 -04:00
Adrian Garcia Badaracco	a3a15d2eb2	error invalid pyproject.toml configs (#264 )	2022-09-23 21:16:07 -04:00
Charlie Marsh	5af95428ff	Tweak import	2022-09-23 18:53:57 -04:00
Harutaka Kawamura	6338cad4e6	Remove python 3.6 classifier (#260 )	2022-09-22 20:38:09 -04:00
Harutaka Kawamura	485881877f	Include error code and message in JSON output (#259 )	2022-09-22 20:29:21 -04:00
Charlie Marsh	b8f517c70e	Bump version to 0.0.45	2022-09-22 14:11:09 -04:00
Charlie Marsh	9f601c2abd	Document noqa workflows	2022-09-22 14:10:02 -04:00
Charlie Marsh	c0ce0b0c48	Enable automatic `noqa` insertion (#256 )	2022-09-22 13:59:06 -04:00
Charlie Marsh	e5b16973a9	Enable autofix for M001 (#255 )	2022-09-22 13:21:03 -04:00
Charlie Marsh	de9ceb2fe1	Only enforce multi-line noqa directives for strings (#258 )	2022-09-22 13:09:02 -04:00
Charlie Marsh	38b19b78b7	Enable noqa directives on logical lines (#257 )	2022-09-22 12:56:15 -04:00
Charlie Marsh	7043e15b57	Move noqa to a separate module	2022-09-22 09:04:54 -04:00
Charlie Marsh	9594079235	Add --extend-select and --extend-ignore (#254 )	2022-09-21 19:56:43 -04:00
Charlie Marsh	732f208e47	Add a lint rule to enforce noqa validity (#253 )	2022-09-21 19:56:38 -04:00
Charlie Marsh	32e62d9209	Use specific version tags	2022-09-21 15:11:53 -04:00
Charlie Marsh	d9e4b0cdc1	Implement --show-settings and --show-files (#246 )	2022-09-21 15:08:50 -04:00
Charlie Marsh	36fcfad56a	Remove empty comment	2022-09-21 13:44:49 -04:00
Charlie Marsh	65d29d9734	Adjust line numbers when reporting rules in f-strings (#244 )	2022-09-21 13:42:58 -04:00
Charlie Marsh	1e171ce0e8	Bump version to 0.0.44	2022-09-21 12:25:14 -04:00
Charlie Marsh	2bdc500c61	Re-run cargo insta	2022-09-21 12:24:46 -04:00
Charlie Marsh	f453e429b6	Add a note on parity	2022-09-21 12:24:04 -04:00
Charlie Marsh	73874f4788	Remove proof-of-concept caveat	2022-09-21 12:18:01 -04:00
Charlie Marsh	8846dcdf6a	Update README	2022-09-21 12:17:41 -04:00
Charlie Marsh	d827e6e36a	Implement F405 (#243 )	2022-09-21 12:13:40 -04:00
Harutaka Kawamura	71d9b2ac5f	Implement F402 (#221 )	2022-09-21 11:12:55 -04:00
Anders Kaseorg	401b53cc45	Handle filesystem errors more consistently (#240 )	2022-09-20 23:22:01 -04:00
Anders Kaseorg	aa9c1e255c	Simplify check_path type (#239 )	2022-09-20 21:11:42 -04:00
Anders Kaseorg	f7fc702b2c	Include specified files, even if they lack a .py[i] extension (#238 )	2022-09-20 20:53:52 -04:00
Anders Kaseorg	50ca0d7d0a	Correctly display the location of parse errors (#237 )	2022-09-20 20:53:22 -04:00
Anders Kaseorg	65e0284698	Suppress “Found 0 error(s)” message (#236 )	2022-09-20 19:32:39 -04:00
Charlie Marsh	e4f571ea61	Bump version to 0.0.43	2022-09-20 12:26:49 -04:00
Charlie Marsh	4ed88dd245	Follow-up fixes to path absolution (#235 )	2022-09-20 12:26:32 -04:00
Charlie Marsh	09b926fd59	Optimize imports	2022-09-20 09:10:39 -04:00
Charlie Marsh	a4869e4974	Update benchmark in README	2022-09-20 07:06:12 -06:00
Charlie Marsh	f53c4fc221	Bump version to 0.0.42	2022-09-19 21:14:17 -06:00
Charlie Marsh	3892a49a97	Bump version to 0.0.41	2022-09-19 21:09:33 -06:00
Charlie Marsh	27cc7e236c	Use a separate repo for pre-commit (#229 )	2022-09-19 21:06:39 -06:00
Charlie Marsh	fa0954fe47	Treat relative excludes as relative to project root (#228 )	2022-09-19 20:45:02 -06:00
Charlie Marsh	a0b50d7ebc	Use absolute paths for exclusion matching (#213 )	2022-09-19 20:32:31 -06:00
Charlie Marsh	afe7a04211	Ignore F841 violations when locals() is in scope (#226 )	2022-09-19 20:13:55 -06:00
Charlie Marsh	14806c62ca	Reduce number of sites for new check definitions (#227 )	2022-09-19 20:13:46 -06:00
Suguru Yamamoto	0d0c8730fa	fix: Use UTF-32 char count for line length (#223 ) (#224 )	2022-09-18 10:45:41 -06:00
Harutaka Kawamura	cf6a23b83c	Add `--version` flag (#222 )	2022-09-18 09:15:15 -06:00
Anders Kaseorg	9e0daac561	Enable F404 by default (#219 )	2022-09-18 09:13:23 -06:00
Anders Kaseorg	f2fd7335ce	Use a platform-appropriate location for user configuration (#215 )	2022-09-17 13:29:17 -06:00
Anders Kaseorg	b8f878df5e	Find user configuration even if there’s no project directory (#216 )	2022-09-16 21:47:15 -06:00
Anders Kaseorg	9bdb922c75	Detect multi-target assignment as unpacking if any target is unpacking (#217 )	2022-09-16 21:45:44 -06:00
Anders Kaseorg	edecc1bba6	Fix find_project_root with relative paths (#214 )	2022-09-16 18:04:35 -06:00
Charlie Marsh	8e903153f6	Update README to include more badges	2022-09-16 12:18:03 -06:00
Charlie Marsh	3937885f37	Bump version to 0.0.40	2022-09-16 04:57:21 -04:00
Charlie Marsh	24de97d951	Create cache directory prior to writing .gitignore	2022-09-16 04:56:58 -04:00
Charlie Marsh	06e5b3e457	Bump version to 0.0.39	2022-09-15 21:41:14 -04:00
Charlie Marsh	68a0e6dc19	Remove erroneous test dir	2022-09-15 21:41:00 -04:00
Charlie Marsh	9d4a4478f7	Improve exclusion syntax to match exact files (#209 )	2022-09-15 21:40:49 -04:00
Charlie Marsh	6bbf3f46c4	Add .gitignore to .ruff_cache (#208 )	2022-09-15 20:40:06 -04:00
Charlie Marsh	4ac4e8c991	Exclude .ruff_cache by default (#207 )	2022-09-15 20:39:39 -04:00
Dmitry Dygalo	0091a3ae5f	chore: Do not read the same file twice (#206 )	2022-09-15 16:05:29 -04:00
Patrick Haller	17b3109a8b	Update docs with --format flag (#205 )	2022-09-15 16:04:07 -04:00
Charlie Marsh	71520213c1	Allow __path__ in __init__.py (#201 )	2022-09-15 09:44:03 -04:00
Charlie Marsh	f24e7a0052	Add trailing period to help message	2022-09-15 09:43:51 -04:00
Patrick Haller	507e9f7ec3	Fix: Structured output Issue Fix (#186 )	2022-09-15 09:43:10 -04:00
Charlie Marsh	592c53c8bf	Use binding location when reporting F821 errors (#200 )	2022-09-14 22:51:07 -04:00
Charlie Marsh	a2df89dedd	Bump version to 0.0.38	2022-09-14 22:38:42 -04:00
Charlie Marsh	b8f12d2e79	Raise error when failing to parse (#199 )	2022-09-14 22:37:55 -04:00
Charlie Marsh	67b1d0463a	Pull in pycodestyle tests for E checks (#195 )	2022-09-14 22:22:53 -04:00
Charlie Marsh	d008a181ec	Improve default exclusions and support extend-exclude (#188 )	2022-09-14 22:21:17 -04:00
Charlie Marsh	6d612a428a	Migrate linter tests to insta (#194 )	2022-09-14 21:52:44 -04:00
Charlie Marsh	c0cb73ab16	Implement E721 (#193 )	2022-09-14 21:10:29 -04:00
Charlie Marsh	2e1eb84cbf	Implement F632 (#190 )	2022-09-14 18:22:35 -04:00
Charlie Marsh	b03a8728b5	Add support for from __future__ import annotations (#189 )	2022-09-14 18:22:19 -04:00
Charlie Marsh	1dd3350a30	Revert "Adding flag and logic for different output format" (#187 )	2022-09-14 14:20:02 -04:00
Patrick Haller	bda34945a5	Adding flag and logic for different output format (#185 )	2022-09-14 10:43:32 -04:00
Dmitry Dygalo	85dcaa8d3c	chore: Avoid `collect` in `inner_main` (#184 )	2022-09-14 08:16:04 -04:00
Charlie Marsh	4ac74ed0ad	Revert erroneous pyproject.toml changes	2022-09-14 08:14:26 -04:00
Dmitry Dygalo	b7e2a4b9a9	feat: Implement `InvalidPrintSyntax` (`F633`) (#182 )	2022-09-13 21:10:20 -04:00
Dmitry Dygalo	53a7758248	Avoid some allocations (#179 )	2022-09-13 10:07:22 -04:00
Dmitry Dygalo	2ba767957d	refactor: Use `while let Some` instead of calling `is_empty` (#180 )	2022-09-13 10:06:49 -04:00
Dmitry Dygalo	08152787e1	chore: Use `once_cell` instead of `lazy_static` (#178 )	2022-09-13 10:06:21 -04:00
Charlie Marsh	5f77b420cd	Bump version to 0.0.37	2022-09-12 21:35:08 -04:00
Charlie Marsh	90f9e60517	Implement F722 (#175 )	2022-09-12 21:34:27 -04:00
Brian Okken	320737f6e4	Change URL to comply with PEP 621 (#173 )	2022-09-12 18:38:20 -04:00
Charlie Marsh	dfba1416b2	Implement F406 (#172 )	2022-09-12 16:47:30 -04:00
Charlie Marsh	2ca3f35bd1	Remove one match from checks.rs	2022-09-12 16:32:27 -04:00
Adrian Garcia Badaracco	b1c40d5fa7	Run MacOS builds in parallel (#171 )	2022-09-12 16:24:13 -04:00
Charlie Marsh	a129e27b3e	Tweak rule counts	2022-09-12 15:26:21 -04:00
Charlie Marsh	ad7daa008e	Update README to enumerate missing Flake8 rules	2022-09-12 15:24:32 -04:00
Charlie Marsh	062d7081a0	Bump version to 0.0.36	2022-09-12 11:16:26 -04:00
Charlie Marsh	40c1e7e005	Implement F701 and F702 (#169 )	2022-09-12 11:16:08 -04:00
Charlie Marsh	3cbd05ddff	Update README	2022-09-12 09:31:16 -04:00
Harutaka Kawamura	9414090617	Implement E722 (#166 )	2022-09-12 09:04:39 -04:00
Harutaka Kawamura	825777edc1	Add test case for assignment expression in `E741.py` (#168 )	2022-09-12 09:03:36 -04:00
Charlie Marsh	4e0807e908	Include line length in E501 messages (#165 )	2022-09-11 22:54:11 -04:00
Charlie Marsh	546be5692a	Bump version to 0.0.35	2022-09-11 21:54:00 -04:00
Charlie Marsh	43e1f20b28	Allow unused assignments in for loops and unpacking (#163 )	2022-09-11 21:53:45 -04:00
Harutaka Kawamura	97388cefda	Implement E743 (#162 )	2022-09-11 21:27:33 -04:00
Harutaka Kawamura	63ce579989	Implement E742 (#160 )	2022-09-11 20:27:48 -04:00
Charlie Marsh	5f4a62aa40	Bump version to 0.0.34	2022-09-11 18:05:52 -04:00
Charlie Marsh	02ab52b3e2	Implement F407 (#158 )	2022-09-11 18:05:28 -04:00
Charlie Marsh	549732b1da	Implement F404 (#159 )	2022-09-11 18:05:00 -04:00
Harutaka Kawamura	c4565fe0f5	Implement E741 (#137 )	2022-09-11 12:30:28 -04:00