Bump version to 0.0.50

Avoid falling back to A003 when A001 is disabled (#302 )
Enable LibCST-based autofixing for SPR001 (#297 )
2022-10-02 20:43:30 -04:00 · 2022-10-02 20:43:12 -04:00 · 2022-10-02 19:58:13 -04:00 · 2022-10-02 12:50:42 -04:00 · 2022-10-02 12:49:48 -04:00 · 2022-10-01 09:43:47 -04:00
93 changed files with 4340 additions and 1135 deletions
--- a/.editorconfig
+++ b/.editorconfig
@@ -0,0 +1,14 @@
+# Check http://editorconfig.org for more information
+# This is the main config file for this project:
+root = true
+
+[*]
+charset = utf-8
+trim_trailing_whitespace = true
+end_of_line = lf
+indent_style = space
+insert_final_newline = true
+indent_size = 2
+
+[*.{rs,py}]
+indent_size = 4
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,10 @@
 repos:
-  - repo: https://github.com/charliermarsh/ruff
-    rev: v0.0.39
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.0.40
    hooks:
      - id: lint
+
+  - repo: https://github.com/abravalheri/validate-pyproject
+    rev: v0.10.1
+    hooks:
+      - id: validate-pyproject
--- 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/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+charlie.r.marsh@gmail.com.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -0,0 +1,105 @@
+# Contributing to ruff
+
+Welcome! We're happy to have you here. Thank you in advance for your contribution to ruff.
+
+## The basics
+
+ruff welcomes contributions in the form of Pull Requests. For small changes (e.g., bug fixes), feel
+free to submit a PR. For larger changes (e.g., new lint rules, new functionality, new configuration
+options), consider submitting an [Issue](https://github.com/charliermarsh/ruff/issues) outlining
+your proposed change.
+
+### Prerequisites
+
+ruff is written in Rust (1.63.0). You'll need to install the
+[Rust toolchain](https://www.rust-lang.org/tools/install) for development.
+
+### Development
+
+After cloning the repository, run ruff locally with:
+
+```shell
+cargo run resources/test/fixtures --no-cache
+```
+
+Prior to opening a pull request, ensure that your code has been auto-formatted, and that it passes
+both the lint and test validation checks:
+
+```shell
+cargo fmt     # Auto-formatting...
+cargo clippy  # Linting...
+cargo test    # Testing...
+```
+
+These checks will run on GitHub Actions when you open your Pull Request, but running them locally
+will save you time and expedite the merge process.
+
+Your Pull Request will be reviewed by a maintainer, which may involve a few rounds of iteration
+prior to merging.
+
+### Example: Adding a new lint rule
+
+There are three phases to adding a new lint rule:
+
+1. Define the rule in `src/checks.rs`.
+2. Define the _logic_ for triggering the rule in `src/check_ast.rs` (for AST-based checks)
+   or `src/check_lines.rs` (for text-based checks).
+3. Add a test fixture.
+
+To define the rule, open up `src/checks.rs`. You'll need to define both a `CheckCode` and
+`CheckKind`. As an example, you can grep for `E402` and `ModuleImportNotAtTopOfFile`, and follow the
+pattern implemented therein.
+
+To trigger the rule, you'll likely want to augment the logic in `src/check_ast.rs`, which defines
+the Python AST visitor, responsible for iterating over the abstract syntax tree and collecting
+lint-rule violations as it goes. Grep for the `Check::new` invocations to understand how other,
+similar rules are implemented.
+
+To add a test fixture, create a file under `resources/test/fixtures`, named to match the `CheckCode`
+you defined earlier (e.g., `E402.py`). This file should contain a variety of violations and
+non-violations designed to evaluate and demonstrate the behavior of your lint rule. Run ruff locally
+with (e.g.) `cargo run resources/test/fixtures/E402.py`. Once you're satisified with the output,
+codify the behavior as a snapshot test by adding a new function to the `mod tests` section of
+`src/linter.rs`, like so:
+
+```rust
+#[test]
+fn e402() -> Result<()> {
+    let mut checks = check_path(
+        Path::new("./resources/test/fixtures/E402.py"),
+        &settings::Settings::for_rule(CheckCode::E402),
+        &fixer::Mode::Generate,
+    )?;
+    checks.sort_by_key(|check| check.location);
+    insta::assert_yaml_snapshot!(checks);
+    Ok(())
+}
+```
+
+Then, run `cargo test`. Your test will fail, but you'll be prompted to follow-up with
+`cargo insta review`. Accept the generated snapshot, then commit the snapshot file alongside the
+rest of your changes.
+
+### Example: Adding a new configuration option
+
+ruff's user-facing settings live in two places: first, the command-line options defined with
+[clap](https://docs.rs/clap/latest/clap/) via the `Cli` struct in `src/main.rs`; and second, the
+`Config` struct defined `src/pyproject.rs`, which is responsible for extracting user-defined
+settings from a `pyproject.toml` file.
+
+Ultimately, these two sources of configuration are merged into the `Settings` struct defined
+in `src/settings.rs`, which is then threaded through the codebase.
+
+To add a new configuration option, you'll likely want to _both_ add a CLI option to `src/main.rs`
+_and_ a `pyproject.toml` parameter to `src/pyproject.rs`. If you want to pattern-match against an
+existing example, grep for `dummy_variable_rgx`, which defines a regular expression to match against
+acceptable unused variables (e.g., `_`).
+
+## Release process
+
+As of now, ruff has an ad hoc release process: releases are cut with high frequency via GitHub
+Actions, which automatically generates the appropriate wheels across architectures and publishes
+them to [PyPI](https://pypi.org/project/ruff/).
+
+ruff follows the [semver](https://semver.org/) versioning standard. However, as pre-1.0 software,
+even patch releases may contain [non-backwards-compatible changes](https://semver.org/#spec-item-4).
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -37,6 +37,12 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "annotate-snippets"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7021ce4924a3f25f802b2cccd1af585e39ea1a363a1aa2e72afe54b67a3a7a7"
+
 [[package]]
 name = "anyhow"
 version = "1.0.60"
@@ -359,6 +365,15 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

+[[package]]
+name = "chic"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a5b5db619f3556839cb2223ae86ff3f9a09da2c5013be42bc9af08c9589bf70c"
+dependencies = [
+ "annotate-snippets",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.21"
@@ -382,26 +397,24 @@ 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 +425,9 @@ 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",
 ]
@@ -1064,9 +1077,9 @@ dependencies = [

 [[package]]
 name = "itertools"
-version = "0.10.3"
+version = "0.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9a9d19fa1e79b6215ff29b9d6880b706147f16e9b1dbb1e4e5947b5b02bc5e3"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
 dependencies = [
 "either",
 ]
@@ -1155,6 +1168,30 @@ version = "0.2.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "505e71a4706fa491e9b1b55f51b95d4037d0821ee40131190475f692b35b009b"

+[[package]]
+name = "libcst"
+version = "0.1.0"
+source = "git+https://github.com/charliermarsh/LibCST?rev=32a044c127668df44582f85699358e67803b0d73#32a044c127668df44582f85699358e67803b0d73"
+dependencies = [
+ "chic",
+ "itertools",
+ "libcst_derive",
+ "once_cell",
+ "paste",
+ "peg",
+ "regex",
+ "thiserror",
+]
+
+[[package]]
+name = "libcst_derive"
+version = "0.1.0"
+source = "git+https://github.com/charliermarsh/LibCST?rev=32a044c127668df44582f85699358e67803b0d73#32a044c127668df44582f85699358e67803b0d73"
+dependencies = [
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "linked-hash-map"
 version = "0.5.6"
@@ -1381,9 +1418,9 @@ dependencies = [

 [[package]]
 name = "once_cell"
-version = "1.13.1"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "074864da206b4973b84eb91683020dbefd6a8c3f0f38e054d93954e891935e4e"
+checksum = "e82dad04139b71a90c080c8463fe0dc7902db5192d939bd0950f074d014339e1"

 [[package]]
 name = "opaque-debug"
@@ -1432,6 +1469,12 @@ dependencies = [
 "windows-sys",
 ]

+[[package]]
+name = "paste"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1de2e551fb905ac83f73f7aedf2f0cb4a0da7e35efa24a202a936269f1f18e1"
+
 [[package]]
 name = "path-absolutize"
 version = "3.0.13"
@@ -1450,6 +1493,33 @@ dependencies = [
 "once_cell",
 ]

+[[package]]
+name = "peg"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a07f2cafdc3babeebc087e499118343442b742cc7c31b4d054682cc598508554"
+dependencies = [
+ "peg-macros",
+ "peg-runtime",
+]
+
+[[package]]
+name = "peg-macros"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a90084dc05cf0428428e3d12399f39faad19b0909f64fb9170c9fdd6d9cd49b"
+dependencies = [
+ "peg-runtime",
+ "proc-macro2",
+ "quote",
+]
+
+[[package]]
+name = "peg-runtime"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9fa00462b37ead6d11a82c9d568b26682d78e0477dc02d1966c013af80969739"
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -1801,7 +1871,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.39"
+version = "0.0.50"
 dependencies = [
 "anyhow",
 "bincode",
@@ -1817,6 +1887,7 @@ dependencies = [
 "glob",
 "insta",
 "itertools",
+ "libcst",
 "log",
 "notify",
 "once_cell",
@@ -1846,7 +1917,7 @@ 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=4f457893efc381ad5c432576b24bcc7e4a08c641#4f457893efc381ad5c432576b24bcc7e4a08c641"
 dependencies = [
 "num-bigint",
 "rustpython-compiler-core",
@@ -1855,7 +1926,7 @@ 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=4f457893efc381ad5c432576b24bcc7e4a08c641#4f457893efc381ad5c432576b24bcc7e4a08c641"
 dependencies = [
 "bincode",
 "bitflags",
@@ -1872,7 +1943,7 @@ 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=4f457893efc381ad5c432576b24bcc7e4a08c641#4f457893efc381ad5c432576b24bcc7e4a08c641"
 dependencies = [
 "ahash",
 "anyhow",
@@ -2187,26 +2258,20 @@ 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"
+version = "1.0.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5f6586b7f764adc0231f4c79be7b920e766bb2f3e51b3661cdb263828f19994"
+checksum = "10deb33631e3c9018b9baf9dcbbc4f737320d2b576bac10f6aefa048fa407e3e"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.32"
+version = "1.0.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12bafc5b54507e0149cdf1b145a5d80ab80a90bcd9275df43d4fff68460f6c21"
+checksum = "982d17546b47146b28f7c22e3d08465f6b8903d0ea13c1660d9d84a6e7adcdbb"
 dependencies = [
 "proc-macro2",
 "quote",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.0.39"
+version = "0.0.50"
 edition = "2021"

 [lib]
@@ -11,22 +11,23 @@ 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" }
 dirs = { version = "4.0.0" }
 fern = { version = "0.6.1" }
 filetime = { version = "0.2.17" }
-glob = "0.3.0"
-itertools = "0.10.3"
+glob = { version = "0.3.0" }
+itertools = { version = "0.10.5" }
+libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "32a044c127668df44582f85699358e67803b0d73" }
 log = { version = "0.4.17" }
 notify = { version = "4.0.17" }
 once_cell = { version = "1.13.1" }
-path-absolutize = "3.0.13"
+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 = "4f457893efc381ad5c432576b24bcc7e4a08c641" }
 serde = { version = "1.0.143", features = ["derive"] }
 serde_json = { version = "1.0.83" }
 toml = { version = "0.5.9" }
--- 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: v0.0.39
-  hooks:
-    - id: lint
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.0.48
+    hooks:
+      - id: lint
 ```

 ## Configuration
@@ -80,87 +80,139 @@ 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 (v0.0.39)
-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 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
-    -f, --fix
-            Attempt to automatically fix lint errors
-        --format <FORMAT>
-            Output serialization format for error messages [default: text] [possible values: text,
-            json]
-    -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
-  directory from which you execute `ruff`, and _not_ the directory of the `pyproject.toml`.
+- 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 60 rules, give or take. At time of writing, ruff
-implements 42 rules. (Note that these 42 rules likely cover a disproportionate share of errors:
-unused imports, undefined variables, etc.)
-
-The unimplemented rules are tracked in #170, and include:
-
- 14 rules related to string `.format` calls.
- 4 logical rules.
- 1 rule related to parsing.
+**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

@@ -178,11 +230,13 @@ Beyond rule-set parity, ruff suffers from the following limitations vis-à-vis F
 | E741 | AmbiguousVariableName | ambiguous variable name '...' |
 | E742 | AmbiguousClassName | ambiguous class name '...' |
 | E743 | AmbiguousFunctionName | ambiguous function name '...' |
-| E902 | IOError | No such file or directory: `...` |
+| E902 | IOError | ... |
 | E999 | SyntaxError | SyntaxError: ... |
 | F401 | UnusedImport | `...` imported but unused |
-| F403 | ImportStarUsage | `from ... import *` used; 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 |
@@ -206,8 +260,51 @@ Beyond rule-set parity, ruff suffers from the following limitations vis-à-vis F
 | F831 | DuplicateArgumentName | Duplicate argument name in function definition |
 | F841 | UnusedVariable | Local variable `...` is assigned to but never used |
 | F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` |
+| A001 | BuiltinVariableShadowing | Variable `...` is shadowing a python builtin |
+| A002 | BuiltinArgumentShadowing | Argument `...` is shadowing a python builtin |
+| A003 | BuiltinAttributeShadowing | class attribute `...` is shadowing a python builtin |
+| SPR001 | SuperCallWithParameters | Use `super()` instead of `super(__class__, self)` |
 | R001 | UselessObjectInheritance | Class `...` inherits from object |
 | R002 | NoAssertEquals | `assertEquals` is deprecated, use `assertEqual` instead |
+| M001 | UnusedNOQA | Unused `noqa` directive |
+
+## Integrations
+
+### PyCharm
+
+ruff can be installed as an [External Tool](https://www.jetbrains.com/help/pycharm/configuring-third-party-tools.html)
+in PyCharm. Open the Preferences pane, then navigate to "Tools", then "External Tools". From there,
+add a new tool with the following configuration:
+
+![Install ruff as an External Tool](https://user-images.githubusercontent.com/1309177/193155720-336e43f0-1a8d-46b4-bc12-e60f9ae01f7e.png)
+
+ruff should then appear as a runnable action:
+
+![ruff as a runnable action](https://user-images.githubusercontent.com/1309177/193156026-732b0aaf-3dd9-4549-9b4d-2de6d2168a33.png)
+
+### GitHub Actions
+
+GitHub Actions has everything you need to run ruff out-of-the-box:
+
+```yaml
+name: CI
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install ruff
+      - name: Run ruff
+        run: ruff .
+```

 ## Development

@@ -243,29 +340,29 @@ Add this `pyproject.toml` to the CPython directory:
 ```toml
 [tool.ruff]
 line-length = 88
-exclude = [
-    "./resources/test/cpython/Lib/lib2to3/tests/data/bom.py",
-    "./resources/test/cpython/Lib/lib2to3/tests/data/crlf.py",
-    "./resources/test/cpython/Lib/lib2to3/tests/data/different_encoding.py",
-    "./resources/test/cpython/Lib/lib2to3/tests/data/false_encoding.py",
-    "./resources/test/cpython/Lib/lib2to3/tests/data/py2_test_grammar.py",
-    "./resources/test/cpython/Lib/test/bad_coding2.py",
-    "./resources/test/cpython/Lib/test/badsyntax_3131.py",
-    "./resources/test/cpython/Lib/test/badsyntax_pep3120.py",
-    "./resources/test/cpython/Lib/test/encoded_modules/module_iso_8859_1.py",
-    "./resources/test/cpython/Lib/test/encoded_modules/module_koi8_r.py",
-    "./resources/test/cpython/Lib/test/test_fstring.py",
-    "./resources/test/cpython/Lib/test/test_grammar.py",
-    "./resources/test/cpython/Lib/test/test_importlib/test_util.py",
-    "./resources/test/cpython/Lib/test/test_named_expressions.py",
-    "./resources/test/cpython/Lib/test/test_patma.py",
-    "./resources/test/cpython/Lib/test/test_source_encoding.py",
-    "./resources/test/cpython/Tools/c-analyzer/c_parser/parser/_delim.py",
-    "./resources/test/cpython/Tools/i18n/pygettext.py",
-    "./resources/test/cpython/Tools/test2to3/maintest.py",
-    "./resources/test/cpython/Tools/test2to3/setup.py",
-    "./resources/test/cpython/Tools/test2to3/test/test_foo.py",
-    "./resources/test/cpython/Tools/test2to3/test2to3/hello.py",
+extend-exclude = [
+    "Lib/lib2to3/tests/data/bom.py",
+    "Lib/lib2to3/tests/data/crlf.py",
+    "Lib/lib2to3/tests/data/different_encoding.py",
+    "Lib/lib2to3/tests/data/false_encoding.py",
+    "Lib/lib2to3/tests/data/py2_test_grammar.py",
+    "Lib/test/bad_coding2.py",
+    "Lib/test/badsyntax_3131.py",
+    "Lib/test/badsyntax_pep3120.py",
+    "Lib/test/encoded_modules/module_iso_8859_1.py",
+    "Lib/test/encoded_modules/module_koi8_r.py",
+    "Lib/test/test_fstring.py",
+    "Lib/test/test_grammar.py",
+    "Lib/test/test_importlib/test_util.py",
+    "Lib/test/test_named_expressions.py",
+    "Lib/test/test_patma.py",
+    "Lib/test/test_source_encoding.py",
+    "Tools/c-analyzer/c_parser/parser/_delim.py",
+    "Tools/i18n/pygettext.py",
+    "Tools/test2to3/maintest.py",
+    "Tools/test2to3/setup.py",
+    "Tools/test2to3/test/test_foo.py",
+    "Tools/test2to3/test2to3/hello.py",
 ]
 ```

@@ -274,17 +371,21 @@ 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:
@@ -296,11 +397,8 @@ 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:
@@ -310,68 +408,65 @@ 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

 MIT
+
+## Contributing
+
+Contributions are welcome and hugely appreciated. To get started, check out the
+[contributing guidelines](https://github.com/charliermarsh/ruff/blob/main/CONTRIBUTORS.md).
--- a/examples/generate_rules_table.rs
+++ b/examples/generate_rules_table.rs
@@ -1,56 +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::AmbiguousClassName("...".to_string()),
-        CheckKind::AmbiguousFunctionName("...".to_string()),
-        CheckKind::AmbiguousVariableName("...".to_string()),
-        CheckKind::AssertTuple,
-        CheckKind::BreakOutsideLoop,
-        CheckKind::ContinueOutsideLoop,
-        CheckKind::DefaultExceptNotLast,
-        CheckKind::DoNotAssignLambda,
-        CheckKind::DoNotUseBareExcept,
-        CheckKind::DuplicateArgumentName,
-        CheckKind::FStringMissingPlaceholders,
-        CheckKind::ForwardAnnotationSyntaxError("...".to_string()),
-        CheckKind::FutureFeatureNotDefined("...".to_string()),
-        CheckKind::IOError("...".to_string()),
-        CheckKind::IfTuple,
-        CheckKind::ImportStarNotPermitted("...".to_string()),
-        CheckKind::ImportStarUsage("...".to_string()),
-        CheckKind::InvalidPrintSyntax,
-        CheckKind::IsLiteral,
-        CheckKind::LateFutureImport,
-        CheckKind::LineTooLong(89, 88),
-        CheckKind::ModuleImportNotAtTopOfFile,
-        CheckKind::MultiValueRepeatedKeyLiteral,
-        CheckKind::MultiValueRepeatedKeyVariable("...".to_string()),
-        CheckKind::NoAssertEquals,
-        CheckKind::NoneComparison(RejectedCmpop::Eq),
-        CheckKind::NotInTest,
-        CheckKind::NotIsTest,
-        CheckKind::RaiseNotImplemented,
-        CheckKind::ReturnOutsideFunction,
-        CheckKind::SyntaxError("...".to_string()),
-        CheckKind::TooManyExpressionsInStarredAssignment,
-        CheckKind::TrueFalseComparison(true, RejectedCmpop::Eq),
-        CheckKind::TwoStarredExpressions,
-        CheckKind::TypeComparison,
-        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",
--- 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/E402.py
+++ b/resources/test/fixtures/E402.py
@@ -1,4 +1,8 @@
 """Top-level docstring."""
+
+__all__ = ["y"]
+__version__: str = "0.1.0"
+
 import a

 try:
--- 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/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/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/F821.py
+++ b/resources/test/fixtures/F821.py
@@ -82,3 +82,10 @@ class Ticket:
 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
@@ -10,15 +10,28 @@ except ValueError as e:
    print(e)


-def f():
+def f1():
    x = 1
    y = 2
    z = x + y


-def g():
+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/SPR001.py
+++ b/resources/test/fixtures/SPR001.py
@@ -0,0 +1,22 @@
+class Parent:
+    def method(self):
+        pass
+
+    def wrong(self):
+        pass
+
+
+class Child(Parent):
+    def method(self):
+        parent = super()  # ok
+        super().method()  # ok
+        Parent.method(self)  # ok
+        Parent.super(1, 2)  # ok
+
+    def wrong(self):
+        parent = super(Child, self)  # wrong
+        super(Child, self).method  # wrong
+        super(
+            Child,
+            self,
+        ).method()  # wrong
--- a/resources/test/fixtures/pyproject.toml
+++ b/resources/test/fixtures/pyproject.toml
@@ -3,49 +3,5 @@ line-length = 88
 extend-exclude = [
    "excluded.py",
    "migrations",
-    "./resources/test/fixtures/directory/also_excluded.py",
-]
-select = [
-    "E402",
-    "E501",
-    "E711",
-    "E712",
-    "E713",
-    "E714",
-    "E721",
-    "E722",
-    "E731",
-    "E741",
-    "E742",
-    "E743",
-    "E902",
-    "E999",
-    "F401",
-    "F403",
-    "F404",
-    "F406",
-    "F407",
-    "F541",
-    "F601",
-    "F602",
-    "F621",
-    "F622",
-    "F631",
-    "F632",
-    "F633",
-    "F634",
-    "F701",
-    "F702",
-    "F704",
-    "F706",
-    "F707",
-    "F722",
-    "F821",
-    "F822",
-    "F823",
-    "F831",
-    "F841",
-    "F901",
-    "R001",
-    "R002",
+    "directory/also_excluded.py",
 ]
--- a/src/ast/checks.rs
+++ b/src/ast/checks.rs
@@ -1,18 +1,22 @@
 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, StmtKind, Unaryop,
 };

 use crate::ast::operations::SourceCodeLocator;
-use crate::ast::types::{Binding, BindingKind, Scope};
+use crate::ast::types::{
+    Binding, BindingKind, CheckLocator, FunctionScope, Range, 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> {
+pub fn check_if_tuple(test: &Expr, location: Range) -> Option<Check> {
    if let ExprKind::Tuple { elts, .. } = &test.node {
        if !elts.is_empty() {
            return Some(Check::new(CheckKind::IfTuple, location));
@@ -22,7 +26,7 @@ pub fn check_if_tuple(test: &Expr, location: Location) -> Option<Check> {
 }

 /// Check AssertTuple compliance.
-pub fn check_assert_tuple(test: &Expr, location: Location) -> Option<Check> {
+pub fn check_assert_tuple(test: &Expr, location: Range) -> Option<Check> {
    if let ExprKind::Tuple { elts, .. } = &test.node {
        if !elts.is_empty() {
            return Some(Check::new(CheckKind::AssertTuple, location));
@@ -37,6 +41,7 @@ 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![];

@@ -46,12 +51,18 @@ pub fn check_not_tests(
                match op {
                    Cmpop::In => {
                        if check_not_in {
-                            checks.push(Check::new(CheckKind::NotInTest, operand.location));
+                            checks.push(Check::new(
+                                CheckKind::NotInTest,
+                                locator.locate_check(Range::from_located(operand)),
+                            ));
                        }
                    }
                    Cmpop::Is => {
                        if check_not_is {
-                            checks.push(Check::new(CheckKind::NotIsTest, operand.location));
+                            checks.push(Check::new(
+                                CheckKind::NotIsTest,
+                                locator.locate_check(Range::from_located(operand)),
+                            ));
                        }
                    }
                    _ => {}
@@ -64,21 +75,31 @@ 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),
            ));
        }
    }
@@ -87,7 +108,7 @@ pub fn check_unused_variables(scope: &Scope) -> Vec<Check> {
 }

 /// Check DoNotAssignLambda compliance.
-pub fn check_do_not_assign_lambda(value: &Expr, location: Location) -> Option<Check> {
+pub fn check_do_not_assign_lambda(value: &Expr, location: Range) -> Option<Check> {
    if let ExprKind::Lambda { .. } = &value.node {
        Some(Check::new(CheckKind::DoNotAssignLambda, location))
    } else {
@@ -100,7 +121,7 @@ fn is_ambiguous_name(name: &str) -> bool {
 }

 /// Check AmbiguousVariableName compliance.
-pub fn check_ambiguous_variable_name(name: &str, location: Location) -> Option<Check> {
+pub fn check_ambiguous_variable_name(name: &str, location: Range) -> Option<Check> {
    if is_ambiguous_name(name) {
        Some(Check::new(
            CheckKind::AmbiguousVariableName(name.to_string()),
@@ -112,7 +133,7 @@ pub fn check_ambiguous_variable_name(name: &str, location: Location) -> Option<C
 }

 /// Check AmbiguousClassName compliance.
-pub fn check_ambiguous_class_name(name: &str, location: Location) -> Option<Check> {
+pub fn check_ambiguous_class_name(name: &str, location: Range) -> Option<Check> {
    if is_ambiguous_name(name) {
        Some(Check::new(
            CheckKind::AmbiguousClassName(name.to_string()),
@@ -124,7 +145,7 @@ pub fn check_ambiguous_class_name(name: &str, location: Location) -> Option<Chec
 }

 /// Check AmbiguousFunctionName compliance.
-pub fn check_ambiguous_function_name(name: &str, location: Location) -> Option<Check> {
+pub fn check_ambiguous_function_name(name: &str, location: Range) -> Option<Check> {
    if is_ambiguous_name(name) {
        Some(Check::new(
            CheckKind::AmbiguousFunctionName(name.to_string()),
@@ -156,7 +177,7 @@ pub fn check_useless_object_inheritance(
                    }) => {
                        let mut check = Check::new(
                            CheckKind::UselessObjectInheritance(name.to_string()),
-                            expr.location,
+                            Range::from_located(expr),
                        );
                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
                            if let Some(fix) = fixes::remove_class_def_base(
@@ -187,7 +208,7 @@ pub fn check_default_except_not_last(handlers: &Vec<Excepthandler>) -> Option<Ch
        if type_.is_none() && idx < handlers.len() - 1 {
            return Some(Check::new(
                CheckKind::DefaultExceptNotLast,
-                handler.location,
+                Range::from_located(handler),
            ));
        }
    }
@@ -201,13 +222,19 @@ pub fn check_raise_not_implemented(expr: &Expr) -> Option<Check> {
        ExprKind::Call { func, .. } => {
            if let ExprKind::Name { id, .. } = &func.node {
                if id == "NotImplemented" {
-                    return Some(Check::new(CheckKind::RaiseNotImplemented, expr.location));
+                    return Some(Check::new(
+                        CheckKind::RaiseNotImplemented,
+                        Range::from_located(expr),
+                    ));
                }
            }
        }
        ExprKind::Name { id, .. } => {
            if id == "NotImplemented" {
-                return Some(Check::new(CheckKind::RaiseNotImplemented, expr.location));
+                return Some(Check::new(
+                    CheckKind::RaiseNotImplemented,
+                    Range::from_located(expr),
+                ));
            }
        }
        _ => {}
@@ -239,7 +266,10 @@ pub fn check_duplicate_arguments(arguments: &Arguments) -> Vec<Check> {
    for arg in all_arguments {
        let ident = &arg.node.arg;
        if idents.contains(ident.as_str()) {
-            checks.push(Check::new(CheckKind::DuplicateArgumentName, arg.location));
+            checks.push(Check::new(
+                CheckKind::DuplicateArgumentName,
+                Range::from_located(arg),
+            ));
        }
        idents.insert(ident);
    }
@@ -253,12 +283,16 @@ pub fn check_assert_equals(expr: &Expr, autofix: &fixer::Mode) -> Option<Check>
        if attr == "assertEquals" {
            if let ExprKind::Name { id, .. } = &value.node {
                if id == "self" {
-                    let mut check = Check::new(CheckKind::NoAssertEquals, expr.location);
+                    let mut check =
+                        Check::new(CheckKind::NoAssertEquals, Range::from_located(expr));
                    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),
-                            end: Location::new(
+                            location: Location::new(
+                                expr.location.row(),
+                                expr.location.column() + 1,
+                            ),
+                            end_location: Location::new(
                                expr.location.row(),
                                expr.location.column() + 1 + "assertEquals".len(),
                            ),
@@ -292,6 +326,7 @@ 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![];

@@ -306,7 +341,7 @@ pub fn check_repeated_keys(
                    if check_repeated_literals && v1 == v2 {
                        checks.push(Check::new(
                            CheckKind::MultiValueRepeatedKeyLiteral,
-                            k2.location,
+                            locator.locate_check(Range::from_located(k2)),
                        ))
                    }
                }
@@ -314,7 +349,7 @@ pub fn check_repeated_keys(
                    if check_repeated_variables && v1 == v2 {
                        checks.push(Check::new(
                            CheckKind::MultiValueRepeatedKeyVariable((*v2).to_string()),
-                            k2.location,
+                            locator.locate_check(Range::from_located(k2)),
                        ))
                    }
                }
@@ -333,6 +368,7 @@ 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![];

@@ -352,13 +388,13 @@ pub fn check_literal_comparisons(
        if matches!(op, Cmpop::Eq) {
            checks.push(Check::new(
                CheckKind::NoneComparison(RejectedCmpop::Eq),
-                comparator.location,
+                locator.locate_check(Range::from_located(comparator)),
            ));
        }
        if matches!(op, Cmpop::NotEq) {
            checks.push(Check::new(
                CheckKind::NoneComparison(RejectedCmpop::NotEq),
-                comparator.location,
+                locator.locate_check(Range::from_located(comparator)),
            ));
        }
    }
@@ -372,13 +408,13 @@ pub fn check_literal_comparisons(
            if matches!(op, Cmpop::Eq) {
                checks.push(Check::new(
                    CheckKind::TrueFalseComparison(value, RejectedCmpop::Eq),
-                    comparator.location,
+                    locator.locate_check(Range::from_located(comparator)),
                ));
            }
            if matches!(op, Cmpop::NotEq) {
                checks.push(Check::new(
                    CheckKind::TrueFalseComparison(value, RejectedCmpop::NotEq),
-                    comparator.location,
+                    locator.locate_check(Range::from_located(comparator)),
                ));
            }
        }
@@ -398,13 +434,13 @@ pub fn check_literal_comparisons(
            if matches!(op, Cmpop::Eq) {
                checks.push(Check::new(
                    CheckKind::NoneComparison(RejectedCmpop::Eq),
-                    comparator.location,
+                    locator.locate_check(Range::from_located(comparator)),
                ));
            }
            if matches!(op, Cmpop::NotEq) {
                checks.push(Check::new(
                    CheckKind::NoneComparison(RejectedCmpop::NotEq),
-                    comparator.location,
+                    locator.locate_check(Range::from_located(comparator)),
                ));
            }
        }
@@ -418,13 +454,13 @@ pub fn check_literal_comparisons(
                if matches!(op, Cmpop::Eq) {
                    checks.push(Check::new(
                        CheckKind::TrueFalseComparison(value, RejectedCmpop::Eq),
-                        comparator.location,
+                        locator.locate_check(Range::from_located(comparator)),
                    ));
                }
                if matches!(op, Cmpop::NotEq) {
                    checks.push(Check::new(
                        CheckKind::TrueFalseComparison(value, RejectedCmpop::NotEq),
-                        comparator.location,
+                        locator.locate_check(Range::from_located(comparator)),
                    ));
                }
            }
@@ -461,7 +497,7 @@ pub fn check_is_literal(
    left: &Expr,
    ops: &Vec<Cmpop>,
    comparators: &Vec<Expr>,
-    location: Location,
+    location: Range,
 ) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

@@ -482,7 +518,7 @@ pub fn check_is_literal(
 pub fn check_type_comparison(
    ops: &Vec<Cmpop>,
    comparators: &Vec<Expr>,
-    location: Location,
+    location: Range,
 ) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

@@ -521,9 +557,9 @@ pub fn check_type_comparison(
 /// 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: Range,
 ) -> Option<Check> {
    let mut has_starred: bool = false;
    let mut starred_index: Option<usize> = None;
@@ -556,6 +592,7 @@ 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;
@@ -582,7 +619,10 @@ pub fn check_break_outside_loop(
    }

    if !allowed {
-        Some(Check::new(CheckKind::BreakOutsideLoop, stmt.location))
+        Some(Check::new(
+            CheckKind::BreakOutsideLoop,
+            locator.locate_check(Range::from_located(stmt)),
+        ))
    } else {
        None
    }
@@ -593,6 +633,7 @@ 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;
@@ -619,8 +660,64 @@ pub fn check_continue_outside_loop(
    }

    if !allowed {
-        Some(Check::new(CheckKind::ContinueOutsideLoop, stmt.location))
+        Some(Check::new(
+            CheckKind::ContinueOutsideLoop,
+            locator.locate_check(Range::from_located(stmt)),
+        ))
    } else {
        None
    }
 }
+
+// flake8-builtins
+pub enum ShadowingType {
+    Variable,
+    Argument,
+    Attribute,
+}
+
+/// Check builtin name shadowing
+pub fn check_builtin_shadowing(
+    name: &str,
+    location: Range,
+    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
+    }
+}
+
+// flake8-super
+/// Check that `super()` has no args
+pub fn check_super_args(
+    expr: &Expr,
+    func: &Expr,
+    args: &Vec<Expr>,
+    locator: &mut SourceCodeLocator,
+    autofix: &fixer::Mode,
+) -> Option<Check> {
+    if let ExprKind::Name { id, .. } = &func.node {
+        if id == "super" && !args.is_empty() {
+            let mut check = Check::new(
+                CheckKind::SuperCallWithParameters,
+                Range::from_located(expr),
+            );
+            if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                if let Some(fix) = fixes::remove_super_arguments(locator, expr) {
+                    check.amend(fix);
+                }
+            }
+            return Some(check);
+        }
+    }
+    None
+}
--- a/src/ast/operations.rs
+++ b/src/ast/operations.rs
@@ -101,11 +101,13 @@ pub fn in_nested_block(parent_stack: &[usize], parents: &[&Stmt]) -> bool {
 /// Check if a node represents an unpacking assignment.
 pub fn is_unpacking_assignment(stmt: &Stmt) -> bool {
    if let StmtKind::Assign { targets, value, .. } = &stmt.node {
-        for child in targets {
-            match &child.node {
-                ExprKind::Set { .. } | ExprKind::List { .. } | ExprKind::Tuple { .. } => {}
-                _ => return false,
-            }
+        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,
@@ -132,7 +134,7 @@ impl<'a> SourceCodeLocator<'a> {
        }
    }

-    pub fn slice_source_code(&mut self, location: &Location) -> &'a str {
+    pub fn slice_source_code_at(&mut self, location: &Location) -> &'a str {
        if !self.initialized {
            let mut offset = 0;
            for i in self.content.lines() {
@@ -145,4 +147,19 @@ impl<'a> SourceCodeLocator<'a> {
        let offset = self.offsets[location.row() - 1] + location.column() - 1;
        &self.content[offset..]
    }
+
+    pub fn slice_source_code_range(&mut self, start: &Location, end: &Location) -> &'a str {
+        if !self.initialized {
+            let mut offset = 0;
+            for i in self.content.lines() {
+                self.offsets.push(offset);
+                offset += i.len();
+                offset += 1;
+            }
+            self.initialized = true;
+        }
+        let start = self.offsets[start.row() - 1] + start.column() - 1;
+        let end = self.offsets[end.row() - 1] + end.column() - 1;
+        &self.content[start..end]
+    }
 }
--- a/src/ast/relocate.rs
+++ b/src/ast/relocate.rs
@@ -1,13 +1,17 @@
-use rustpython_parser::ast::{Expr, ExprKind, Keyword, Location};
+use rustpython_parser::ast::{Expr, ExprKind, Keyword};

-fn relocate_keyword(keyword: &mut Keyword, location: Location) {
-    keyword.location = location;
+use crate::ast::types::Range;
+
+fn relocate_keyword(keyword: &mut Keyword, location: Range) {
+    keyword.location = location.location;
+    keyword.end_location = location.end_location;
    relocate_expr(&mut keyword.node.value, location);
 }

 /// Change an expression's location (recursively) to match a desired, fixed location.
-pub fn relocate_expr(expr: &mut Expr, location: Location) {
-    expr.location = location;
+pub fn relocate_expr(expr: &mut Expr, location: Range) {
+    expr.location = location.location;
+    expr.end_location = location.end_location;
    match &mut expr.node {
        ExprKind::BoolOp { values, .. } => {
            for expr in values {
--- a/src/ast/types.rs
+++ b/src/ast/types.rs
@@ -1,17 +1,37 @@
 use std::collections::BTreeMap;
 use std::sync::atomic::{AtomicUsize, Ordering};

-use rustpython_parser::ast::Location;
+use rustpython_parser::ast::{Located, Location};

 fn id() -> usize {
    static COUNTER: AtomicUsize = AtomicUsize::new(1);
    COUNTER.fetch_add(1, Ordering::Relaxed)
 }

+#[derive(Clone, Copy, Debug, Default)]
+pub struct Range {
+    pub location: Location,
+    pub end_location: Location,
+}
+
+impl Range {
+    pub fn from_located<T>(located: &Located<T>) -> Self {
+        Range {
+            location: located.location,
+            end_location: located.end_location,
+        }
+    }
+}
+
+#[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 +40,7 @@ pub enum ScopeKind {
 pub struct Scope {
    pub id: usize,
    pub kind: ScopeKind,
+    pub import_starred: bool,
    pub values: BTreeMap<String, Binding>,
 }

@@ -28,6 +49,7 @@ impl Scope {
        Scope {
            id: id(),
            kind,
+            import_starred: false,
            values: BTreeMap::new(),
        }
    }
@@ -39,6 +61,7 @@ pub enum BindingKind {
    Argument,
    Assignment,
    Binding,
+    LoopVar,
    Builtin,
    ClassDefinition,
    Definition,
@@ -52,8 +75,12 @@ pub enum BindingKind {
 #[derive(Clone, Debug)]
 pub struct Binding {
    pub kind: BindingKind,
-    pub location: Location,
-    /// Tuple of (scope index, location) indicating the scope and location at which the binding was
+    pub location: Range,
+    /// Tuple of (scope index, range) indicating the scope and range at which the binding was
    /// last used.
-    pub used: Option<(usize, Location)>,
+    pub used: Option<(usize, Range)>,
+}
+
+pub trait CheckLocator {
+    fn locate_check(&self, default: Range) -> Range;
 }
--- a/src/autofix/fixer.rs
+++ b/src/autofix/fixer.rs
@@ -45,29 +45,29 @@ fn apply_fixes<'a>(fixes: impl Iterator<Item = &'a mut Fix>, contents: &str) ->

    for fix in fixes {
        // Best-effort approach: if this fix overlaps with a fix we've already applied, skip it.
-        if last_pos > fix.start {
+        if last_pos > fix.location {
            continue;
        }

-        if fix.start.row() > last_pos.row() {
+        if fix.location.row() > last_pos.row() {
            if last_pos.row() > 0 || last_pos.column() > 0 {
                output.push_str(&lines[last_pos.row() - 1][last_pos.column() - 1..]);
                output.push('\n');
            }
-            for line in &lines[last_pos.row()..fix.start.row() - 1] {
+            for line in &lines[last_pos.row()..fix.location.row() - 1] {
                output.push_str(line);
                output.push('\n');
            }
-            output.push_str(&lines[fix.start.row() - 1][..fix.start.column() - 1]);
+            output.push_str(&lines[fix.location.row() - 1][..fix.location.column() - 1]);
            output.push_str(&fix.content);
        } else {
            output.push_str(
-                &lines[last_pos.row() - 1][last_pos.column() - 1..fix.start.column() - 1],
+                &lines[last_pos.row() - 1][last_pos.column() - 1..fix.location.column() - 1],
            );
            output.push_str(&fix.content);
        }

-        last_pos = fix.end;
+        last_pos = fix.end_location;
        fix.applied = true;
    }

@@ -106,8 +106,8 @@ mod tests {
    fn apply_single_replacement() -> Result<()> {
        let mut fixes = vec![Fix {
            content: "Bar".to_string(),
-            start: Location::new(1, 9),
-            end: Location::new(1, 15),
+            location: Location::new(1, 9),
+            end_location: Location::new(1, 15),
            applied: false,
        }];
        let actual = apply_fixes(
@@ -130,8 +130,8 @@ mod tests {
    fn apply_single_removal() -> Result<()> {
        let mut fixes = vec![Fix {
            content: "".to_string(),
-            start: Location::new(1, 8),
-            end: Location::new(1, 16),
+            location: Location::new(1, 8),
+            end_location: Location::new(1, 16),
            applied: false,
        }];
        let actual = apply_fixes(
@@ -155,14 +155,14 @@ mod tests {
        let mut fixes = vec![
            Fix {
                content: "".to_string(),
-                start: Location::new(1, 8),
-                end: Location::new(1, 17),
+                location: Location::new(1, 8),
+                end_location: Location::new(1, 17),
                applied: false,
            },
            Fix {
                content: "".to_string(),
-                start: Location::new(1, 17),
-                end: Location::new(1, 24),
+                location: Location::new(1, 17),
+                end_location: Location::new(1, 24),
                applied: false,
            },
        ];
@@ -187,14 +187,14 @@ mod tests {
        let mut fixes = vec![
            Fix {
                content: "".to_string(),
-                start: Location::new(1, 8),
-                end: Location::new(1, 16),
+                location: Location::new(1, 8),
+                end_location: Location::new(1, 16),
                applied: false,
            },
            Fix {
                content: "ignored".to_string(),
-                start: Location::new(1, 10),
-                end: Location::new(1, 12),
+                location: Location::new(1, 10),
+                end_location: Location::new(1, 12),
                applied: false,
            },
        ];
--- a/src/autofix/fixes.rs
+++ b/src/autofix/fixes.rs
@@ -1,3 +1,4 @@
+use libcst_native::{Codegen, Expression, SmallStatement, Statement};
 use rustpython_parser::ast::{Expr, Keyword, Location};
 use rustpython_parser::lexer;
 use rustpython_parser::token::Tok;
@@ -25,7 +26,7 @@ pub fn remove_class_def_base(
    bases: &[Expr],
    keywords: &[Keyword],
 ) -> Option<Fix> {
-    let content = locator.slice_source_code(stmt_at);
+    let content = locator.slice_source_code_at(stmt_at);

    // Case 1: `object` is the only base.
    if bases.len() == 1 && keywords.is_empty() {
@@ -52,8 +53,8 @@ pub fn remove_class_def_base(
        return match (fix_start, fix_end) {
            (Some(start), Some(end)) => Some(Fix {
                content: "".to_string(),
-                start,
-                end,
+                location: start,
+                end_location: end,
                applied: false,
            }),
            _ => None,
@@ -91,8 +92,8 @@ pub fn remove_class_def_base(
        match (fix_start, fix_end) {
            (Some(start), Some(end)) => Some(Fix {
                content: "".to_string(),
-                start,
-                end,
+                location: start,
+                end_location: end,
                applied: false,
            }),
            _ => None,
@@ -116,11 +117,42 @@ pub fn remove_class_def_base(
        match (fix_start, fix_end) {
            (Some(start), Some(end)) => Some(Fix {
                content: "".to_string(),
-                start,
-                end,
+                location: start,
+                end_location: end,
                applied: false,
            }),
            _ => None,
        }
    }
 }
+
+pub fn remove_super_arguments(locator: &mut SourceCodeLocator, expr: &Expr) -> Option<Fix> {
+    let contents = locator.slice_source_code_range(&expr.location, &expr.end_location);
+
+    let mut tree = match libcst_native::parse_module(contents, None) {
+        Ok(m) => m,
+        Err(_) => return None,
+    };
+
+    if let Some(Statement::Simple(body)) = tree.body.first_mut() {
+        if let Some(SmallStatement::Expr(body)) = body.body.first_mut() {
+            if let Expression::Call(body) = &mut body.value {
+                body.args = vec![];
+                body.whitespace_before_args = Default::default();
+                body.whitespace_after_func = Default::default();
+
+                let mut state = Default::default();
+                tree.codegen(&mut state);
+
+                return Some(Fix {
+                    content: state.to_string(),
+                    location: expr.location,
+                    end_location: expr.end_location,
+                    applied: false,
+                });
+            }
+        }
+    }
+
+    None
+}
--- a/src/cache.rs
+++ b/src/cache.rs
@@ -1,5 +1,5 @@
 use std::collections::hash_map::DefaultHasher;
-use std::fs::{File, Metadata};
+use std::fs::{create_dir_all, File, Metadata};
 use std::hash::{Hash, Hasher};
 use std::io::Write;
 use std::path::Path;
@@ -8,6 +8,7 @@ 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;
@@ -79,7 +80,7 @@ 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()
    )
@@ -90,6 +91,7 @@ pub fn init() -> Result<()> {
    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())
 }
--- a/src/check_ast.rs
+++ b/src/check_ast.rs
@@ -1,15 +1,19 @@
 use std::ops::Deref;
 use std::path::Path;

+use once_cell::sync::Lazy;
+use regex::Regex;
 use rustpython_parser::ast::{
    Arg, Arguments, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprContext, ExprKind,
-    KeywordData, Location, Operator, Stmt, StmtKind, Suite,
+    KeywordData, Operator, Stmt, StmtKind, Suite,
 };
 use rustpython_parser::parser;

 use crate::ast::operations::{extract_all_names, SourceCodeLocator};
 use crate::ast::relocate::relocate_expr;
-use crate::ast::types::{Binding, BindingKind, Scope, ScopeKind};
+use crate::ast::types::{
+    Binding, BindingKind, CheckLocator, FunctionScope, Range, Scope, ScopeKind,
+};
 use crate::ast::visitor::{walk_excepthandler, Visitor};
 use crate::ast::{checks, operations, visitor};
 use crate::autofix::fixer;
@@ -21,6 +25,8 @@ use crate::settings::Settings;

 pub const GLOBAL_SCOPE_INDEX: usize = 0;

+static DUNDER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"__[^\s]+__").unwrap());
+
 struct Checker<'a> {
    // Input data.
    locator: SourceCodeLocator<'a>,
@@ -36,13 +42,13 @@ struct Checker<'a> {
    scopes: Vec<Scope>,
    scope_stack: Vec<usize>,
    dead_scopes: Vec<usize>,
-    deferred_string_annotations: Vec<(Location, &'a str)>,
+    deferred_string_annotations: Vec<(Range, &'a str)>,
    deferred_annotations: Vec<(&'a Expr, Vec<usize>, Vec<usize>)>,
    deferred_functions: Vec<(&'a Stmt, Vec<usize>, Vec<usize>)>,
    deferred_lambdas: Vec<(&'a Expr, Vec<usize>, Vec<usize>)>,
    deferred_assignments: Vec<usize>,
    // Derivative state.
-    in_f_string: bool,
+    in_f_string: Option<Range>,
    in_annotation: bool,
    in_literal: bool,
    seen_non_import: bool,
@@ -74,7 +80,7 @@ impl<'a> Checker<'a> {
            deferred_functions: vec![],
            deferred_lambdas: vec![],
            deferred_assignments: vec![],
-            in_f_string: false,
+            in_f_string: None,
            in_annotation: false,
            in_literal: false,
            seen_non_import: false,
@@ -101,6 +107,36 @@ fn is_annotated_subscript(expr: &Expr) -> bool {
    }
 }

+fn is_assignment_to_a_dunder(node: &StmtKind) -> bool {
+    // Check whether it's an assignment to a dunder, with or without a type annotation.
+    // This is what pycodestyle (as of 2.9.1) does.
+    match node {
+        StmtKind::Assign {
+            targets,
+            value: _,
+            type_comment: _,
+        } => {
+            if targets.len() != 1 {
+                return false;
+            }
+            match &targets[0].node {
+                ExprKind::Name { id, ctx: _ } => DUNDER_REGEX.is_match(id),
+                _ => false,
+            }
+        }
+        StmtKind::AnnAssign {
+            target,
+            annotation: _,
+            value: _,
+            simple: _,
+        } => match &target.node {
+            ExprKind::Name { id, ctx: _ } => DUNDER_REGEX.is_match(id),
+            _ => false,
+        },
+        _ => false,
+    }
+}
+
 impl<'a, 'b> Visitor<'b> for Checker<'a>
 where
    'b: 'a,
@@ -157,10 +193,11 @@ where
                    self.futures_allowed = false;
                }
            }
-            _ => {
+            node => {
                self.futures_allowed = false;

                if !self.seen_non_import
+                    && !is_assignment_to_a_dunder(node)
                    && !operations::in_nested_block(&self.parent_stack, &self.parents)
                {
                    self.seen_non_import = true;
@@ -171,7 +208,6 @@ where
        // Pre-visit.
        match &stmt.node {
            StmtKind::Global { names } | StmtKind::Nonlocal { names } => {
-                // TODO(charlie): Handle doctests.
                let global_scope_id = self.scopes[GLOBAL_SCOPE_INDEX].id;

                let current_scope =
@@ -184,8 +220,8 @@ where
                                name.to_string(),
                                Binding {
                                    kind: BindingKind::Assignment,
-                                    used: Some((global_scope_id, stmt.location)),
-                                    location: stmt.location,
+                                    used: Some((global_scope_id, Range::from_located(stmt))),
+                                    location: Range::from_located(stmt),
                                },
                            );
                        }
@@ -193,25 +229,34 @@ where
                }

                if self.settings.select.contains(&CheckCode::E741) {
-                    self.checks.extend(names.iter().filter_map(|name| {
-                        checks::check_ambiguous_variable_name(name, stmt.location)
-                    }));
+                    let location = self.locate_check(Range::from_located(stmt));
+                    self.checks.extend(
+                        names.iter().filter_map(|name| {
+                            checks::check_ambiguous_variable_name(name, location)
+                        }),
+                    );
                }
            }
            StmtKind::Break => {
                if self.settings.select.contains(&CheckCode::F701) {
-                    if let Some(check) =
-                        checks::check_break_outside_loop(stmt, &self.parents, &self.parent_stack)
-                    {
+                    if let Some(check) = checks::check_break_outside_loop(
+                        stmt,
+                        &self.parents,
+                        &self.parent_stack,
+                        self,
+                    ) {
                        self.checks.push(check);
                    }
                }
            }
            StmtKind::Continue => {
                if self.settings.select.contains(&CheckCode::F702) {
-                    if let Some(check) =
-                        checks::check_continue_outside_loop(stmt, &self.parents, &self.parent_stack)
-                    {
+                    if let Some(check) = checks::check_continue_outside_loop(
+                        stmt,
+                        &self.parents,
+                        &self.parent_stack,
+                        self,
+                    ) {
                        self.checks.push(check);
                    }
                }
@@ -231,11 +276,16 @@ where
                ..
            } => {
                if self.settings.select.contains(&CheckCode::E743) {
-                    if let Some(check) = checks::check_ambiguous_function_name(name, stmt.location)
-                    {
+                    if let Some(check) = checks::check_ambiguous_function_name(
+                        name,
+                        self.locate_check(Range::from_located(stmt)),
+                    ) {
                        self.checks.push(check);
                    }
                }
+
+                self.check_builtin_shadowing(name, Range::from_located(stmt), true);
+
                for expr in decorator_list {
                    self.visit_expr(expr);
                }
@@ -278,7 +328,7 @@ where
                    Binding {
                        kind: BindingKind::Definition,
                        used: None,
-                        location: stmt.location,
+                        location: Range::from_located(stmt),
                    },
                );
            }
@@ -293,7 +343,7 @@ where
                            ScopeKind::Class | ScopeKind::Module => {
                                self.checks.push(Check::new(
                                    CheckKind::ReturnOutsideFunction,
-                                    stmt.location,
+                                    self.locate_check(Range::from_located(stmt)),
                                ));
                            }
                            _ => {}
@@ -325,11 +375,20 @@ where
                }

                if self.settings.select.contains(&CheckCode::E742) {
-                    if let Some(check) = checks::check_ambiguous_class_name(name, stmt.location) {
+                    if let Some(check) = checks::check_ambiguous_class_name(
+                        name,
+                        self.locate_check(Range::from_located(stmt)),
+                    ) {
                        self.checks.push(check);
                    }
                }

+                self.check_builtin_shadowing(
+                    name,
+                    self.locate_check(Range::from_located(stmt)),
+                    false,
+                );
+
                for expr in bases {
                    self.visit_expr(expr)
                }
@@ -351,7 +410,7 @@ where
                {
                    self.checks.push(Check::new(
                        CheckKind::ModuleImportNotAtTopOfFile,
-                        stmt.location,
+                        self.locate_check(Range::from_located(stmt)),
                    ));
                }

@@ -366,10 +425,14 @@ where
                                    alias.node.name.to_string(),
                                ),
                                used: None,
-                                location: stmt.location,
+                                location: Range::from_located(stmt),
                            },
                        )
                    } else {
+                        if let Some(asname) = &alias.node.asname {
+                            self.check_builtin_shadowing(asname, Range::from_located(stmt), false);
+                        }
+
                        self.add_binding(
                            alias
                                .node
@@ -385,13 +448,17 @@ where
                                        .unwrap_or_else(|| alias.node.name.clone()),
                                ),
                                used: None,
-                                location: stmt.location,
+                                location: Range::from_located(stmt),
                            },
                        )
                    }
                }
            }
-            StmtKind::ImportFrom { names, module, .. } => {
+            StmtKind::ImportFrom {
+                names,
+                module,
+                level,
+            } => {
                if self
                    .settings
                    .select
@@ -401,7 +468,7 @@ where
                {
                    self.checks.push(Check::new(
                        CheckKind::ModuleImportNotAtTopOfFile,
-                        stmt.location,
+                        self.locate_check(Range::from_located(stmt)),
                    ));
                }

@@ -422,9 +489,9 @@ where
                                        .last()
                                        .expect("No current scope found."))]
                                    .id,
-                                    stmt.location,
+                                    Range::from_located(stmt),
                                )),
-                                location: stmt.location,
+                                location: Range::from_located(stmt),
                            },
                        );

@@ -437,54 +504,68 @@ where
                        {
                            self.checks.push(Check::new(
                                CheckKind::FutureFeatureNotDefined(alias.node.name.to_string()),
-                                stmt.location,
+                                self.locate_check(Range::from_located(stmt)),
                            ));
                        }

                        if self.settings.select.contains(&CheckCode::F404) && !self.futures_allowed
                        {
-                            self.checks
-                                .push(Check::new(CheckKind::LateFutureImport, stmt.location));
+                            self.checks.push(Check::new(
+                                CheckKind::LateFutureImport,
+                                self.locate_check(Range::from_located(stmt)),
+                            ));
                        }
                    } else if alias.node.name == "*" {
+                        let module_name = format!(
+                            "{}{}",
+                            ".".repeat(level.unwrap_or_default()),
+                            module.clone().unwrap_or_else(|| "module".to_string()),
+                        );
+
                        self.add_binding(
-                            name,
+                            module_name.to_string(),
                            Binding {
                                kind: BindingKind::StarImportation,
                                used: None,
-                                location: stmt.location,
+                                location: Range::from_located(stmt),
                            },
                        );

-                        if self.settings.select.contains(&CheckCode::F403) {
-                            self.checks.push(Check::new(
-                                CheckKind::ImportStarUsage(
-                                    module.clone().unwrap_or_else(|| "module".to_string()),
-                                ),
-                                stmt.location,
-                            ));
-                        }
-
                        if self.settings.select.contains(&CheckCode::F406) {
                            let scope = &self.scopes
                                [*(self.scope_stack.last().expect("No current scope found."))];
                            if !matches!(scope.kind, ScopeKind::Module) {
                                self.checks.push(Check::new(
-                                    CheckKind::ImportStarNotPermitted(
-                                        module.clone().unwrap_or_else(|| "module".to_string()),
-                                    ),
-                                    stmt.location,
+                                    CheckKind::ImportStarNotPermitted(module_name.to_string()),
+                                    self.locate_check(Range::from_located(stmt)),
                                ));
                            }
                        }
+
+                        if self.settings.select.contains(&CheckCode::F403) {
+                            self.checks.push(Check::new(
+                                CheckKind::ImportStarUsed(module_name.to_string()),
+                                self.locate_check(Range::from_located(stmt)),
+                            ));
+                        }
+
+                        let scope = &mut self.scopes[*(self
+                            .scope_stack
+                            .last_mut()
+                            .expect("No current scope found."))];
+                        scope.import_starred = true;
                    } else {
+                        if let Some(asname) = &alias.node.asname {
+                            self.check_builtin_shadowing(asname, Range::from_located(stmt), false);
+                        }
+
                        let binding = Binding {
                            kind: BindingKind::Importation(match module {
                                None => name.clone(),
                                Some(parent) => format!("{}.{}", parent, name),
                            }),
                            used: None,
-                            location: stmt.location,
+                            location: Range::from_located(stmt),
                        };
                        self.add_binding(name, binding)
                    }
@@ -504,14 +585,19 @@ where
            }
            StmtKind::If { test, .. } => {
                if self.settings.select.contains(&CheckCode::F634) {
-                    if let Some(check) = checks::check_if_tuple(test, stmt.location) {
+                    if let Some(check) =
+                        checks::check_if_tuple(test, self.locate_check(Range::from_located(stmt)))
+                    {
                        self.checks.push(check);
                    }
                }
            }
            StmtKind::Assert { test, .. } => {
                if self.settings.select.contains(CheckKind::AssertTuple.code()) {
-                    if let Some(check) = checks::check_assert_tuple(test, stmt.location) {
+                    if let Some(check) = checks::check_assert_tuple(
+                        test,
+                        self.locate_check(Range::from_located(stmt)),
+                    ) {
                        self.checks.push(check);
                    }
                }
@@ -525,7 +611,10 @@ where
            }
            StmtKind::Assign { value, .. } => {
                if self.settings.select.contains(&CheckCode::E731) {
-                    if let Some(check) = checks::check_do_not_assign_lambda(value, stmt.location) {
+                    if let Some(check) = checks::check_do_not_assign_lambda(
+                        value,
+                        self.locate_check(Range::from_located(stmt)),
+                    ) {
                        self.checks.push(check);
                    }
                }
@@ -533,9 +622,10 @@ where
            StmtKind::AnnAssign { value, .. } => {
                if self.settings.select.contains(&CheckCode::E731) {
                    if let Some(value) = value {
-                        if let Some(check) =
-                            checks::check_do_not_assign_lambda(value, stmt.location)
-                        {
+                        if let Some(check) = checks::check_do_not_assign_lambda(
+                            value,
+                            self.locate_check(Range::from_located(stmt)),
+                        ) {
                            self.checks.push(check);
                        }
                    }
@@ -570,7 +660,7 @@ where
                Binding {
                    kind: BindingKind::ClassDefinition,
                    used: None,
-                    location: stmt.location,
+                    location: Range::from_located(stmt),
                },
            );
        };
@@ -590,7 +680,6 @@ where
        let prev_in_literal = self.in_literal;
        let prev_in_annotation = self.in_annotation;

-        // Important:
        if self.in_annotation && self.annotations_future_enabled {
            self.deferred_annotations.push((
                expr,
@@ -616,9 +705,9 @@ where
                        self.settings.select.contains(&CheckCode::F622);
                    if let Some(check) = checks::check_starred_expressions(
                        elts,
-                        expr.location,
                        check_too_many_expressions,
                        check_two_starred_expressions,
+                        self.locate_check(Range::from_located(expr)),
                    ) {
                        self.checks.push(check);
                    }
@@ -628,24 +717,52 @@ where
                ExprContext::Load => self.handle_node_load(expr),
                ExprContext::Store => {
                    if self.settings.select.contains(&CheckCode::E741) {
-                        if let Some(check) =
-                            checks::check_ambiguous_variable_name(id, expr.location)
-                        {
+                        if let Some(check) = checks::check_ambiguous_variable_name(
+                            id,
+                            self.locate_check(Range::from_located(expr)),
+                        ) {
                            self.checks.push(check);
                        }
                    }
+
+                    self.check_builtin_shadowing(id, Range::from_located(expr), true);
+
                    let parent =
                        self.parents[*(self.parent_stack.last().expect("No parent found."))];
                    self.handle_node_store(expr, parent);
                }
                ExprContext::Del => self.handle_node_delete(expr),
            },
-            ExprKind::Call { func, .. } => {
+            ExprKind::Call { func, args, .. } => {
                if self.settings.select.contains(&CheckCode::R002) {
                    if let Some(check) = checks::check_assert_equals(func, self.autofix) {
                        self.checks.push(check)
                    }
                }
+
+                // flake8-super
+                if self.settings.select.contains(&CheckCode::SPR001) {
+                    if let Some(check) =
+                        checks::check_super_args(expr, func, args, &mut self.locator, self.autofix)
+                    {
+                        self.checks.push(check)
+                    }
+                }
+
+                if let ExprKind::Name { id, ctx } = &func.node {
+                    if id == "locals" && matches!(ctx, ExprContext::Load) {
+                        let scope = &mut self.scopes[*(self
+                            .scope_stack
+                            .last_mut()
+                            .expect("No current scope found."))];
+                        if matches!(
+                            scope.kind,
+                            ScopeKind::Function(FunctionScope { uses_locals: false })
+                        ) {
+                            scope.kind = ScopeKind::Function(FunctionScope { uses_locals: true });
+                        }
+                    }
+                }
            }
            ExprKind::Dict { keys, .. } => {
                let check_repeated_literals = self.settings.select.contains(&CheckCode::F601);
@@ -655,6 +772,7 @@ where
                        keys,
                        check_repeated_literals,
                        check_repeated_variables,
+                        self,
                    ));
                }
            }
@@ -667,12 +785,14 @@ where
                    .contains(CheckKind::YieldOutsideFunction.code())
                    && matches!(scope.kind, ScopeKind::Class | ScopeKind::Module)
                {
-                    self.checks
-                        .push(Check::new(CheckKind::YieldOutsideFunction, expr.location));
+                    self.checks.push(Check::new(
+                        CheckKind::YieldOutsideFunction,
+                        self.locate_check(Range::from_located(expr)),
+                    ));
                }
            }
            ExprKind::JoinedStr { values } => {
-                if !self.in_f_string
+                if self.in_f_string.is_none()
                    && self
                        .settings
                        .select
@@ -683,10 +803,10 @@ where
                {
                    self.checks.push(Check::new(
                        CheckKind::FStringMissingPlaceholders,
-                        expr.location,
+                        self.locate_check(Range::from_located(expr)),
                    ));
                }
-                self.in_f_string = true;
+                self.in_f_string = Some(Range::from_located(expr));
            }
            ExprKind::BinOp {
                left,
@@ -703,8 +823,10 @@ where
                                ..
                            }) = scope.values.get("print")
                            {
-                                self.checks
-                                    .push(Check::new(CheckKind::InvalidPrintSyntax, left.location));
+                                self.checks.push(Check::new(
+                                    CheckKind::InvalidPrintSyntax,
+                                    Range::from_located(left),
+                                ));
                            }
                        }
                    }
@@ -719,6 +841,7 @@ where
                        operand,
                        check_not_in,
                        check_not_is,
+                        self,
                    ));
                }
            }
@@ -736,6 +859,7 @@ where
                        comparators,
                        check_none_comparisons,
                        check_true_false_comparisons,
+                        self,
                    ));
                }

@@ -744,7 +868,7 @@ where
                        left,
                        ops,
                        comparators,
-                        expr.location,
+                        self.locate_check(Range::from_located(expr)),
                    ));
                }

@@ -752,7 +876,7 @@ where
                    self.checks.extend(checks::check_type_comparison(
                        ops,
                        comparators,
-                        expr.location,
+                        self.locate_check(Range::from_located(expr)),
                    ));
                }
            }
@@ -761,7 +885,7 @@ where
                ..
            } if self.in_annotation && !self.in_literal => {
                self.deferred_string_annotations
-                    .push((expr.location, value));
+                    .push((Range::from_located(expr), value));
            }
            ExprKind::GeneratorExp { .. }
            | ExprKind::ListComp { .. }
@@ -911,18 +1035,26 @@ where
                if self.settings.select.contains(&CheckCode::E722) && type_.is_none() {
                    self.checks.push(Check::new(
                        CheckKind::DoNotUseBareExcept,
-                        excepthandler.location,
+                        Range::from_located(excepthandler),
                    ));
                }
                match name {
                    Some(name) => {
                        if self.settings.select.contains(&CheckCode::E741) {
-                            if let Some(check) =
-                                checks::check_ambiguous_variable_name(name, excepthandler.location)
-                            {
+                            if let Some(check) = checks::check_ambiguous_variable_name(
+                                name,
+                                self.locate_check(Range::from_located(excepthandler)),
+                            ) {
                                self.checks.push(check);
                            }
                        }
+
+                        self.check_builtin_shadowing(
+                            name,
+                            Range::from_located(excepthandler),
+                            false,
+                        );
+
                        let scope = &self.scopes
                            [*(self.scope_stack.last().expect("No current scope found."))];
                        if scope.values.contains_key(name) {
@@ -931,6 +1063,7 @@ where
                            self.handle_node_store(
                                &Expr::new(
                                    excepthandler.location,
+                                    excepthandler.end_location,
                                    ExprKind::Name {
                                        id: name.to_string(),
                                        ctx: ExprContext::Store,
@@ -949,6 +1082,7 @@ where
                        self.handle_node_store(
                            &Expr::new(
                                excepthandler.location,
+                                excepthandler.end_location,
                                ExprKind::Name {
                                    id: name.to_string(),
                                    ctx: ExprContext::Store,
@@ -968,7 +1102,7 @@ where
                            {
                                self.checks.push(Check::new(
                                    CheckKind::UnusedVariable(name.to_string()),
-                                    excepthandler.location,
+                                    Range::from_located(excepthandler),
                                ));
                            }
                        }
@@ -1014,16 +1148,26 @@ where
            Binding {
                kind: BindingKind::Argument,
                used: None,
-                location: arg.location,
+                location: Range::from_located(arg),
            },
        );

        if self.settings.select.contains(&CheckCode::E741) {
-            if let Some(check) = checks::check_ambiguous_variable_name(&arg.node.arg, arg.location)
-            {
+            if let Some(check) = checks::check_ambiguous_variable_name(
+                &arg.node.arg,
+                self.locate_check(Range::from_located(arg)),
+            ) {
                self.checks.push(check);
            }
        }
+
+        self.check_builtin_arg_shadowing(&arg.node.arg, Range::from_located(arg));
+    }
+}
+
+impl CheckLocator for Checker<'_> {
+    fn locate_check(&self, default: Range) -> Range {
+        self.in_f_string.unwrap_or(default)
    }
 }

@@ -1083,12 +1227,27 @@ impl<'a> Checker<'a> {
        // TODO(charlie): Don't treat annotations as assignments if there is an existing value.
        let binding = match scope.values.get(&name) {
            None => binding,
-            Some(existing) => Binding {
-                kind: binding.kind,
-                location: binding.location,
-                used: existing.used,
-            },
+            Some(existing) => {
+                if self.settings.select.contains(&CheckCode::F402)
+                    && matches!(existing.kind, BindingKind::Importation(_))
+                    && matches!(binding.kind, BindingKind::LoopVar)
+                {
+                    self.checks.push(Check::new(
+                        CheckKind::ImportShadowedByLoopVar(
+                            name.clone(),
+                            existing.location.location.row(),
+                        ),
+                        binding.location,
+                    ));
+                }
+                Binding {
+                    kind: binding.kind,
+                    location: binding.location,
+                    used: existing.used,
+                }
+            }
        };
+
        scope.values.insert(name, binding);
    }

@@ -1099,6 +1258,7 @@ impl<'a> Checker<'a> {

            let mut first_iter = true;
            let mut in_generator = false;
+            let mut import_starred = false;
            for scope_index in self.scope_stack.iter().rev() {
                let scope = &mut self.scopes[*scope_index];
                if matches!(scope.kind, ScopeKind::Class) {
@@ -1109,12 +1269,34 @@ impl<'a> Checker<'a> {
                    }
                }
                if let Some(binding) = scope.values.get_mut(id) {
-                    binding.used = Some((scope_id, expr.location));
+                    binding.used = Some((scope_id, Range::from_located(expr)));
                    return;
                }

                first_iter = false;
                in_generator = matches!(scope.kind, ScopeKind::Generator);
+                import_starred = import_starred || scope.import_starred;
+            }
+
+            if import_starred {
+                if self.settings.select.contains(&CheckCode::F405) {
+                    let mut from_list = vec![];
+                    for scope_index in self.scope_stack.iter().rev() {
+                        let scope = &self.scopes[*scope_index];
+                        for (name, binding) in scope.values.iter() {
+                            if matches!(binding.kind, BindingKind::StarImportation) {
+                                from_list.push(name.as_str());
+                            }
+                        }
+                    }
+                    from_list.sort();
+
+                    self.checks.push(Check::new(
+                        CheckKind::ImportStarUsage(id.clone(), from_list.join(", ")),
+                        self.locate_check(Range::from_located(expr)),
+                    ));
+                }
+                return;
            }

            if self.settings.select.contains(&CheckCode::F821) {
@@ -1124,7 +1306,7 @@ impl<'a> Checker<'a> {
                }
                self.checks.push(Check::new(
                    CheckKind::UndefinedName(id.clone()),
-                    expr.location,
+                    self.locate_check(Range::from_located(expr)),
                ))
            }
        }
@@ -1136,17 +1318,17 @@ impl<'a> Checker<'a> {
                &self.scopes[*(self.scope_stack.last().expect("No current scope found."))];

            if self.settings.select.contains(&CheckCode::F823)
-                && matches!(current.kind, ScopeKind::Function)
+                && matches!(current.kind, ScopeKind::Function(_))
                && !current.values.contains_key(id)
            {
                for scope in self.scopes.iter().rev().skip(1) {
-                    if matches!(scope.kind, ScopeKind::Function | ScopeKind::Module) {
+                    if matches!(scope.kind, ScopeKind::Function(_) | ScopeKind::Module) {
                        if let Some(binding) = scope.values.get(id) {
                            if let Some((scope_id, location)) = binding.used {
                                if scope_id == current.id {
                                    self.checks.push(Check::new(
                                        CheckKind::UndefinedLocal(id.clone()),
-                                        location,
+                                        self.locate_check(location),
                                    ));
                                }
                            }
@@ -1161,7 +1343,7 @@ impl<'a> Checker<'a> {
                    Binding {
                        kind: BindingKind::Annotation,
                        used: None,
-                        location: expr.location,
+                        location: Range::from_located(expr),
                    },
                );
                return;
@@ -1171,14 +1353,25 @@ impl<'a> Checker<'a> {
            if matches!(
                parent.node,
                StmtKind::For { .. } | StmtKind::AsyncFor { .. }
-            ) || operations::is_unpacking_assignment(parent)
-            {
+            ) {
+                self.add_binding(
+                    id.to_string(),
+                    Binding {
+                        kind: BindingKind::LoopVar,
+                        used: None,
+                        location: Range::from_located(expr),
+                    },
+                );
+                return;
+            }
+
+            if operations::is_unpacking_assignment(parent) {
                self.add_binding(
                    id.to_string(),
                    Binding {
                        kind: BindingKind::Binding,
                        used: None,
-                        location: expr.location,
+                        location: Range::from_located(expr),
                    },
                );
                return;
@@ -1198,7 +1391,7 @@ impl<'a> Checker<'a> {
                    Binding {
                        kind: BindingKind::Export(extract_all_names(parent, current)),
                        used: None,
-                        location: expr.location,
+                        location: Range::from_located(expr),
                    },
                );
                return;
@@ -1209,7 +1402,7 @@ impl<'a> Checker<'a> {
                Binding {
                    kind: BindingKind::Assignment,
                    used: None,
-                    location: expr.location,
+                    location: Range::from_located(expr),
                },
            );
        }
@@ -1228,7 +1421,7 @@ impl<'a> Checker<'a> {
            {
                self.checks.push(Check::new(
                    CheckKind::UndefinedName(id.clone()),
-                    expr.location,
+                    self.locate_check(Range::from_located(expr)),
                ))
            }
        }
@@ -1253,7 +1446,7 @@ impl<'a> Checker<'a> {
            } else if self.settings.select.contains(&CheckCode::F722) {
                self.checks.push(Check::new(
                    CheckKind::ForwardAnnotationSyntaxError(expression.to_string()),
-                    location,
+                    self.locate_check(location),
                ));
            }
        }
@@ -1266,7 +1459,7 @@ impl<'a> Checker<'a> {
        while let Some((stmt, scopes, parents)) = self.deferred_functions.pop() {
            self.parent_stack = parents;
            self.scope_stack = scopes;
-            self.push_scope(Scope::new(ScopeKind::Function));
+            self.push_scope(Scope::new(ScopeKind::Function(Default::default())));

            match &stmt.node {
                StmtKind::FunctionDef { body, args, .. }
@@ -1290,7 +1483,7 @@ impl<'a> Checker<'a> {
        while let Some((expr, scopes, parents)) = self.deferred_lambdas.pop() {
            self.parent_stack = parents;
            self.scope_stack = scopes;
-            self.push_scope(Scope::new(ScopeKind::Function));
+            self.push_scope(Scope::new(ScopeKind::Function(Default::default())));

            if let ExprKind::Lambda { args, body } = &expr.node {
                self.visit_arguments(args);
@@ -1305,17 +1498,21 @@ impl<'a> Checker<'a> {
    }

    fn check_deferred_assignments(&mut self) {
-        while let Some(index) = self.deferred_assignments.pop() {
-            if self.settings.select.contains(&CheckCode::F841) {
-                self.checks
-                    .extend(checks::check_unused_variables(&self.scopes[index]));
+        if self.settings.select.contains(&CheckCode::F841) {
+            while let Some(index) = self.deferred_assignments.pop() {
+                self.checks.extend(checks::check_unused_variables(
+                    &self.scopes[index],
+                    self,
+                    &self.settings.dummy_variable_rgx,
+                ));
            }
        }
    }

    fn check_dead_scopes(&mut self) {
-        if !self.settings.select.contains(&CheckCode::F822)
-            && !self.settings.select.contains(&CheckCode::F401)
+        if !self.settings.select.contains(&CheckCode::F401)
+            && !self.settings.select.contains(&CheckCode::F405)
+            && !self.settings.select.contains(&CheckCode::F822)
        {
            return;
        }
@@ -1330,15 +1527,39 @@ impl<'a> Checker<'a> {
            });

            if self.settings.select.contains(&CheckCode::F822)
+                && !scope.import_starred
                && !self.path.ends_with("__init__.py")
            {
-                if let Some(binding) = all_binding {
+                if let Some(all_binding) = all_binding {
                    if let Some(names) = all_names {
                        for name in names {
                            if !scope.values.contains_key(name) {
                                self.checks.push(Check::new(
                                    CheckKind::UndefinedExport(name.to_string()),
-                                    binding.location,
+                                    self.locate_check(all_binding.location),
+                                ));
+                            }
+                        }
+                    }
+                }
+            }
+
+            if self.settings.select.contains(&CheckCode::F405) && scope.import_starred {
+                if let Some(all_binding) = all_binding {
+                    if let Some(names) = all_names {
+                        let mut from_list = vec![];
+                        for (name, binding) in scope.values.iter() {
+                            if matches!(binding.kind, BindingKind::StarImportation) {
+                                from_list.push(name.as_str());
+                            }
+                        }
+                        from_list.sort();
+
+                        for name in names {
+                            if !scope.values.contains_key(name) {
+                                self.checks.push(Check::new(
+                                    CheckKind::ImportStarUsage(name.clone(), from_list.join(", ")),
+                                    self.locate_check(all_binding.location),
                                ));
                            }
                        }
@@ -1359,7 +1580,7 @@ impl<'a> Checker<'a> {
                            | BindingKind::SubmoduleImportation(full_name) => {
                                self.checks.push(Check::new(
                                    CheckKind::UnusedImport(full_name.to_string()),
-                                    binding.location,
+                                    self.locate_check(binding.location),
                                ));
                            }
                            _ => {}
@@ -1369,6 +1590,43 @@ impl<'a> Checker<'a> {
            }
        }
    }
+
+    fn check_builtin_shadowing(&mut self, name: &str, location: Range, is_attribute: bool) {
+        let scope = &self.scopes[*(self.scope_stack.last().expect("No current scope found."))];
+
+        // flake8-builtins
+        if is_attribute && matches!(scope.kind, ScopeKind::Class) {
+            if self.settings.select.contains(&CheckCode::A003) {
+                if let Some(check) = checks::check_builtin_shadowing(
+                    name,
+                    self.locate_check(location),
+                    checks::ShadowingType::Attribute,
+                ) {
+                    self.checks.push(check);
+                }
+            }
+        } else if self.settings.select.contains(&CheckCode::A001) {
+            if let Some(check) = checks::check_builtin_shadowing(
+                name,
+                self.locate_check(location),
+                checks::ShadowingType::Variable,
+            ) {
+                self.checks.push(check);
+            }
+        }
+    }
+
+    fn check_builtin_arg_shadowing(&mut self, name: &str, location: Range) {
+        if self.settings.select.contains(&CheckCode::A002) {
+            if let Some(check) = checks::check_builtin_shadowing(
+                name,
+                self.locate_check(location),
+                checks::ShadowingType::Argument,
+            ) {
+                self.checks.push(check);
+            }
+        }
+    }
 }

 pub fn check_ast(
--- a/src/check_lines.rs
+++ b/src/check_lines.rs
@@ -1,6 +1,12 @@
+use std::collections::BTreeMap;
+
+use crate::ast::types::Range;
 use rustpython_parser::ast::Location;

-use crate::checks::{Check, CheckCode, 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.
@@ -19,37 +25,205 @@ fn should_enforce_line_length(line: &str, length: usize, limit: usize) -> bool {
    }
 }

-pub fn check_lines(checks: &mut Vec<Check>, contents: &str, settings: &Settings) {
+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 {
-            let line_length = line.len();
+            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(row + 1, settings.line_length + 1),
+                    Range {
+                        location: Location::new(lineno + 1, 1),
+                        end_location: Location::new(lineno + 1, line_length + 1),
+                    },
                );
-                if !check.is_inline_ignored(line) {
-                    line_checks.push(check);
+
+                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(start, end) => {
+                    if matches.is_empty() {
+                        let mut check = Check::new(
+                            CheckKind::UnusedNOQA(None),
+                            Range {
+                                location: Location::new(row + 1, start + 1),
+                                end_location: Location::new(row + 1, end + 1),
+                            },
+                        );
+                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                            check.amend(Fix {
+                                content: "".to_string(),
+                                location: Location::new(row + 1, start + 1),
+                                end_location: Location::new(
+                                    row + 1,
+                                    lines[row].chars().count() + 1,
+                                ),
+                                applied: false,
+                            });
+                        }
+                        line_checks.push(check);
+                    }
+                }
+                Directive::Codes(start, end, 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(", "))),
+                            Range {
+                                location: Location::new(row + 1, start + 1),
+                                end_location: Location::new(row + 1, end + 1),
+                            },
+                        );
+                        if matches!(autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                            if valid_codes.is_empty() {
+                                check.amend(Fix {
+                                    content: "".to_string(),
+                                    location: Location::new(row + 1, start + 1),
+                                    end_location: Location::new(
+                                        row + 1,
+                                        lines[row].chars().count() + 1,
+                                    ),
+                                    applied: false,
+                                });
+                            } else {
+                                check.amend(Fix {
+                                    content: format!("  # noqa: {}", valid_codes.join(", ")),
+                                    location: Location::new(row + 1, start + 1),
+                                    end_location: 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
@@ -1,13 +1,124 @@
 use std::str::FromStr;

+use crate::ast::types::Range;
 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; 46] = [
+    // pycodestyle
+    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,
+    // pyflakes
+    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,
+    // flake8-super
+    CheckCode::SPR001,
+];
+
+pub const ALL_CHECK_CODES: [CheckCode; 49] = [
+    // pycodestyle
+    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,
+    // pyflakes
+    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,
+    // flake8-super
+    CheckCode::SPR001,
+    // Meta
+    CheckCode::M001,
+    // Refactor
+    CheckCode::R001,
+    CheckCode::R002,
+];
+
+#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize, Hash, PartialOrd, Ord)]
 pub enum CheckCode {
+    // pycodestyle
    E402,
    E501,
    E711,
@@ -22,9 +133,12 @@ pub enum CheckCode {
    E743,
    E902,
    E999,
+    // pyflakes
    F401,
+    F402,
    F403,
    F404,
+    F405,
    F406,
    F407,
    F541,
@@ -48,8 +162,17 @@ pub enum CheckCode {
    F831,
    F841,
    F901,
+    // flake8-builtins
+    A001,
+    A002,
+    A003,
+    // flake8-super
+    SPR001,
+    // Refactor
    R001,
    R002,
+    // Meta
+    M001,
 }

 impl FromStr for CheckCode {
@@ -57,6 +180,7 @@ impl FromStr for CheckCode {

    fn from_str(s: &str) -> Result<Self> {
        match s {
+            // pycodestyle
            "E402" => Ok(CheckCode::E402),
            "E501" => Ok(CheckCode::E501),
            "E711" => Ok(CheckCode::E711),
@@ -71,9 +195,12 @@ impl FromStr for CheckCode {
            "E743" => Ok(CheckCode::E743),
            "E902" => Ok(CheckCode::E902),
            "E999" => Ok(CheckCode::E999),
+            // pyflakes
            "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),
@@ -97,8 +224,17 @@ impl FromStr for CheckCode {
            "F831" => Ok(CheckCode::F831),
            "F841" => Ok(CheckCode::F841),
            "F901" => Ok(CheckCode::F901),
+            // flake8-builtins
+            "A001" => Ok(CheckCode::A001),
+            "A002" => Ok(CheckCode::A002),
+            "A003" => Ok(CheckCode::A003),
+            // flake8-super
+            "SPR001" => Ok(CheckCode::SPR001),
+            // Refactor
            "R001" => Ok(CheckCode::R001),
            "R002" => Ok(CheckCode::R002),
+            // Meta
+            "M001" => Ok(CheckCode::M001),
            _ => Err(anyhow::anyhow!("Unknown check code: {s}")),
        }
    }
@@ -107,6 +243,7 @@ impl FromStr for CheckCode {
 impl CheckCode {
    pub fn as_str(&self) -> &str {
        match self {
+            // pycodestyle
            CheckCode::E402 => "E402",
            CheckCode::E501 => "E501",
            CheckCode::E711 => "E711",
@@ -121,9 +258,12 @@ impl CheckCode {
            CheckCode::E743 => "E743",
            CheckCode::E902 => "E902",
            CheckCode::E999 => "E999",
+            // pyflakes
            CheckCode::F401 => "F401",
+            CheckCode::F402 => "F402",
            CheckCode::F403 => "F403",
            CheckCode::F404 => "F404",
+            CheckCode::F405 => "F405",
            CheckCode::F406 => "F406",
            CheckCode::F407 => "F407",
            CheckCode::F541 => "F541",
@@ -147,19 +287,89 @@ impl CheckCode {
            CheckCode::F831 => "F831",
            CheckCode::F841 => "F841",
            CheckCode::F901 => "F901",
+            // flake8-builtins
+            CheckCode::A001 => "A001",
+            CheckCode::A002 => "A002",
+            CheckCode::A003 => "A003",
+            // flake8-super
+            CheckCode::SPR001 => "SPR001",
+            // Refactor
            CheckCode::R001 => "R001",
            CheckCode::R002 => "R002",
+            // Meta
+            CheckCode::M001 => "M001",
        }
    }

    /// The source for the check (either the AST, the filesystem, or the physical lines).
    pub fn lint_source(&self) -> &'static LintSource {
        match self {
-            CheckCode::E501 => &LintSource::Lines,
-            CheckCode::E902 | CheckCode::E999 => &LintSource::FileSystem,
+            CheckCode::E501 | CheckCode::M001 => &LintSource::Lines,
+            CheckCode::E902 => &LintSource::FileSystem,
            _ => &LintSource::AST,
        }
    }
+
+    /// A placeholder representation of the CheckKind for the check.
+    pub fn kind(&self) -> CheckKind {
+        match self {
+            // pycodestyle
+            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()),
+            // pyflakes
+            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,
+            // flake8-builtins
+            CheckCode::A001 => CheckKind::BuiltinVariableShadowing("...".to_string()),
+            CheckCode::A002 => CheckKind::BuiltinArgumentShadowing("...".to_string()),
+            CheckCode::A003 => CheckKind::BuiltinAttributeShadowing("...".to_string()),
+            // flake8-super
+            CheckCode::SPR001 => CheckKind::SuperCallWithParameters,
+            // Refactor
+            CheckCode::R001 => CheckKind::UselessObjectInheritance("...".to_string()),
+            CheckCode::R002 => CheckKind::NoAssertEquals,
+            // Meta
+            CheckCode::M001 => CheckKind::UnusedNOQA(None),
+        }
+    }
 }

 #[allow(clippy::upper_case_acronyms)]
@@ -177,6 +387,7 @@ pub enum RejectedCmpop {

 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub enum CheckKind {
+    UnusedNOQA(Option<String>),
    AmbiguousClassName(String),
    AmbiguousFunctionName(String),
    AmbiguousVariableName(String),
@@ -192,8 +403,10 @@ pub enum CheckKind {
    FutureFeatureNotDefined(String),
    IOError(String),
    IfTuple,
+    ImportShadowedByLoopVar(String, usize),
    ImportStarNotPermitted(String),
-    ImportStarUsage(String),
+    ImportStarUsage(String, String),
+    ImportStarUsed(String),
    InvalidPrintSyntax,
    IsLiteral,
    LateFutureImport,
@@ -219,6 +432,12 @@ pub enum CheckKind {
    UnusedVariable(String),
    UselessObjectInheritance(String),
    YieldOutsideFunction,
+    // flake8-builtin
+    BuiltinVariableShadowing(String),
+    BuiltinArgumentShadowing(String),
+    BuiltinAttributeShadowing(String),
+    // flake8-super
+    SuperCallWithParameters,
 }

 impl CheckKind {
@@ -240,8 +459,10 @@ impl CheckKind {
            CheckKind::FutureFeatureNotDefined(_) => "FutureFeatureNotDefined",
            CheckKind::IOError(_) => "IOError",
            CheckKind::IfTuple => "IfTuple",
+            CheckKind::ImportShadowedByLoopVar(_, _) => "ImportShadowedByLoopVar",
            CheckKind::ImportStarNotPermitted(_) => "ImportStarNotPermitted",
-            CheckKind::ImportStarUsage(_) => "ImportStarUsage",
+            CheckKind::ImportStarUsage(_, _) => "ImportStarUsage",
+            CheckKind::ImportStarUsed(_) => "ImportStarUsed",
            CheckKind::InvalidPrintSyntax => "InvalidPrintSyntax",
            CheckKind::IsLiteral => "IsLiteral",
            CheckKind::LateFutureImport => "LateFutureImport",
@@ -269,6 +490,13 @@ 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",
+            // flake8-super
+            CheckKind::SuperCallWithParameters => "SuperCallWithParameters",
        }
    }

@@ -290,8 +518,10 @@ impl CheckKind {
            CheckKind::FutureFeatureNotDefined(_) => &CheckCode::F407,
            CheckKind::IOError(_) => &CheckCode::E902,
            CheckKind::IfTuple => &CheckCode::F634,
+            CheckKind::ImportShadowedByLoopVar(_, _) => &CheckCode::F402,
            CheckKind::ImportStarNotPermitted(_) => &CheckCode::F406,
-            CheckKind::ImportStarUsage(_) => &CheckCode::F403,
+            CheckKind::ImportStarUsage(_, _) => &CheckCode::F405,
+            CheckKind::ImportStarUsed(_) => &CheckCode::F403,
            CheckKind::InvalidPrintSyntax => &CheckCode::F633,
            CheckKind::IsLiteral => &CheckCode::F632,
            CheckKind::LateFutureImport => &CheckCode::F404,
@@ -314,9 +544,16 @@ impl CheckKind {
            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,
+            // flake8-super
+            CheckKind::SuperCallWithParameters => &CheckCode::SPR001,
        }
    }

@@ -356,17 +593,21 @@ impl CheckKind {
            CheckKind::FutureFeatureNotDefined(name) => {
                format!("future feature '{name}' is not defined")
            }
-            CheckKind::IOError(name) => {
-                format!("No such file or directory: `{name}`")
-            }
+            CheckKind::IOError(message) => message.clone(),
            CheckKind::IfTuple => "If test is a tuple, which is always `True`".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::ImportStarUsage(name) => {
+            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()
@@ -443,6 +684,24 @@ 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")
+            }
+            // flake8-super
+            CheckKind::SuperCallWithParameters => {
+                "Use `super()` instead of `super(__class__, self)`".to_string()
+            }
        }
    }

@@ -450,7 +709,10 @@ impl CheckKind {
    pub fn fixable(&self) -> bool {
        matches!(
            self,
-            CheckKind::NoAssertEquals | CheckKind::UselessObjectInheritance(_)
+            CheckKind::NoAssertEquals
+                | CheckKind::UselessObjectInheritance(_)
+                | CheckKind::UnusedNOQA(_)
+                | CheckKind::SuperCallWithParameters
        )
    }
 }
@@ -458,8 +720,8 @@ impl CheckKind {
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Fix {
    pub content: String,
-    pub start: Location,
-    pub end: Location,
+    pub location: Location,
+    pub end_location: Location,
    pub applied: bool,
 }

@@ -467,19 +729,16 @@ pub struct Fix {
 pub struct Check {
    pub kind: CheckKind,
    pub location: Location,
+    pub end_location: Location,
    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 {
+    pub fn new(kind: CheckKind, span: Range) -> Self {
        Self {
            kind,
-            location,
+            location: span.location,
+            end_location: span.end_location,
            fix: None,
        }
    }
@@ -487,25 +746,4 @@ 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
@@ -1,35 +1,57 @@
-use std::env;
+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_excluded(path: &Path, exclude: &[Pattern]) -> bool {
-    // Check the basename.
-    if let Some(file_name) = path.file_name() {
-        if let Some(file_name) = file_name.to_str() {
-            for pattern in exclude {
-                if pattern.matches(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()
+        .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_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;
                }
            }
-        }
-    }
-
-    // Check the complete path.
-    if let Some(file_name) = path.to_str() {
-        for pattern in exclude {
-            if pattern.matches(file_name) {
-                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
 }

@@ -39,50 +61,107 @@ fn is_included(path: &Path) -> bool {
 }

 pub fn iter_python_files<'a>(
-    path: &'a PathBuf,
-    exclude: &'a [Pattern],
-    extend_exclude: &'a [Pattern],
-) -> impl Iterator<Item = DirEntry> + 'a {
+    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))
-        .follow_links(true)
        .into_iter()
-        .filter_entry(|entry| {
-            if exclude.is_empty() && extend_exclude.is_empty() {
+        .filter_entry(move |entry| {
+            if !has_exclude && !has_extend_exclude {
                return true;
            }

            let path = entry.path();
-            if is_excluded(path, exclude) {
-                debug!("Ignored path via `exclude`: {:?}", path);
-                false
-            } else if is_excluded(path, extend_exclude) {
-                debug!("Ignored path via `extend-exclude`: {:?}", path);
-                false
-            } else {
-                true
+            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_map(|entry| entry.ok())
        .filter(|entry| {
-            let path = entry.path();
-            is_included(path)
+            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())
+            })
        })
 }

-pub fn normalize_path(path: &PathBuf) -> PathBuf {
-    if path == Path::new(".") || path == Path::new("..") {
-        return path.clone();
-    }
-    if let Ok(path) = path.absolutize() {
-        if let Ok(root) = env::current_dir() {
-            if let Ok(path) = path.strip_prefix(root) {
-                return Path::new(".").join(path);
-            }
-        }
-    }
-    path.clone()
+/// 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);
@@ -95,53 +174,95 @@ pub fn read_file(path: &Path) -> Result<String> {
 mod tests {
    use std::path::Path;

-    use glob::Pattern;
+    use anyhow::Result;
+    use path_absolutize::Absolutize;

-    use crate::fs::{is_excluded, is_included};
+    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");
-        assert!(is_included(path));
+        let path = Path::new("foo/bar/baz.py").absolutize().unwrap();
+        assert!(is_included(&path));

-        let path = Path::new("foo/bar/baz.pyi");
-        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");
-        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");
-        assert!(!is_included(path));
+        let path = Path::new("foo/bar/baz").absolutize().unwrap();
+        assert!(!is_included(&path));
    }

    #[test]
-    fn exclusions() {
-        let path = Path::new("foo");
-        let exclude = vec![Pattern::new("foo").unwrap()];
-        assert!(is_excluded(path, &exclude));
+    fn exclusions() -> Result<()> {
+        let project_root = Path::new("/tmp/");

-        let path = Path::new("foo/bar");
-        let exclude = vec![Pattern::new("bar").unwrap()];
-        assert!(is_excluded(path, &exclude));
+        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/baz.py");
-        let exclude = vec![Pattern::new("baz.py").unwrap()];
-        assert!(is_excluded(path, &exclude));
+        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");
-        let exclude = vec![Pattern::new("foo/bar").unwrap()];
-        assert!(is_excluded(path, &exclude));
+        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/baz.py");
-        let exclude = vec![Pattern::new("foo/bar/baz.py").unwrap()];
-        assert!(is_excluded(path, &exclude));
+        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");
-        let exclude = vec![Pattern::new("foo/bar/*.py").unwrap()];
-        assert!(is_excluded(path, &exclude));
+        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");
-        let exclude = vec![Pattern::new("baz").unwrap()];
-        assert!(!is_excluded(path, &exclude));
+        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
@@ -1,4 +1,13 @@
-extern crate core;
+use std::path::Path;
+
+use anyhow::Result;
+use log::debug;
+use rustpython_parser::lexer::LexResult;
+
+use crate::autofix::fixer::Mode;
+use crate::linter::{check_path, tokenize};
+use crate::message::Message;
+use crate::settings::Settings;

 mod ast;
 mod autofix;
@@ -10,7 +19,55 @@ pub mod fs;
 pub mod linter;
 pub mod logging;
 pub mod message;
+mod noqa;
 pub mod printer;
-mod pyproject;
+pub mod pyproject;
 mod python;
 pub mod settings;
+
+/// Run ruff over Python source code directly.
+pub fn check(path: &Path, contents: &str) -> Result<Vec<Message>> {
+    // Find the project root and pyproject.toml.
+    let project_root = pyproject::find_project_root(&[path.to_path_buf()]);
+    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..."),
+    };
+
+    let settings = Settings::from_pyproject(pyproject, project_root)?;
+
+    // Tokenize once.
+    let tokens: Vec<LexResult> = tokenize(contents);
+
+    // Determine the noqa line for every line in the source.
+    let noqa_line_for = noqa::extract_noqa_line_for(&tokens);
+
+    // Generate checks.
+    let checks = check_path(
+        path,
+        contents,
+        tokens,
+        &noqa_line_for,
+        &settings,
+        &Mode::None,
+    )?;
+
+    // Convert to messages.
+    let messages: Vec<Message> = checks
+        .into_iter()
+        .map(|check| Message {
+            kind: check.kind,
+            fixed: check.fix.map(|fix| fix.applied).unwrap_or_default(),
+            location: check.location,
+            end_location: check.end_location,
+            filename: path.to_string_lossy().to_string(),
+        })
+        .collect();
+
+    Ok(messages)
+}
--- a/src/linter.rs
+++ b/src/linter.rs
@@ -2,20 +2,38 @@ use std::path::Path;

 use anyhow::Result;
 use log::debug;
-use rustpython_parser::parser;
+use rustpython_parser::lexer::LexResult;
+use rustpython_parser::{lexer, parser};

+use crate::ast::types::Range;
 use crate::autofix::fixer;
 use crate::autofix::fixer::fix_file;
 use crate::check_ast::check_ast;
 use crate::check_lines::check_lines;
-use crate::checks::{Check, LintSource};
+use crate::checks::{Check, CheckCode, CheckKind, LintSource};
 use crate::message::Message;
+use crate::noqa::add_noqa;
 use crate::settings::Settings;
-use crate::{cache, fs};
+use crate::{cache, fs, noqa};

-fn check_path(
+/// Collect tokens up to and including the first error.
+pub(crate) fn tokenize(contents: &str) -> Vec<LexResult> {
+    let mut tokens: Vec<LexResult> = vec![];
+    for tok in lexer::make_tokenizer(contents) {
+        let is_err = tok.is_err();
+        tokens.push(tok);
+        if is_err {
+            break;
+        }
+    }
+    tokens
+}
+
+pub(crate) fn check_path(
    path: &Path,
    contents: &str,
+    tokens: Vec<LexResult>,
+    noqa_line_for: &[usize],
    settings: &Settings,
    autofix: &fixer::Mode,
 ) -> Result<Vec<Check>> {
@@ -28,12 +46,37 @@ fn check_path(
        .iter()
        .any(|check_code| matches!(check_code.lint_source(), LintSource::AST))
    {
-        let python_ast = parser::parse_program(contents, "<filename>")?;
-        checks.extend(check_ast(&python_ast, contents, settings, autofix, path));
+        match parser::parse_program_tokens(tokens, "<filename>") {
+            Ok(python_ast) => {
+                checks.extend(check_ast(&python_ast, contents, settings, autofix, path))
+            }
+            Err(parse_error) => {
+                if settings.select.contains(&CheckCode::E999) {
+                    checks.push(Check::new(
+                        CheckKind::SyntaxError(parse_error.error.to_string()),
+                        Range {
+                            location: parse_error.location,
+                            end_location: parse_error.location,
+                        },
+                    ))
+                }
+            }
+        }
    }

    // Run the lines-based checks.
-    check_lines(&mut checks, contents, settings);
+    check_lines(&mut checks, contents, noqa_line_for, settings, autofix);
+
+    // Create path ignores.
+    if !checks.is_empty() && !settings.per_file_ignores.is_empty() {
+        let ignores = fs::ignores_from_path(path, &settings.per_file_ignores)?;
+        if !ignores.is_empty() {
+            return Ok(checks
+                .into_iter()
+                .filter(|check| !ignores.contains(check.kind.code()))
+                .collect());
+        }
+    }

    Ok(checks)
 }
@@ -55,8 +98,14 @@ pub fn lint_path(
    // Read the file from disk.
    let contents = fs::read_file(path)?;

+    // Tokenize once.
+    let tokens: Vec<LexResult> = tokenize(&contents);
+
+    // Determine the noqa line for every line in the source.
+    let noqa_line_for = noqa::extract_noqa_line_for(&tokens);
+
    // Generate checks.
-    let mut checks = check_path(path, &contents, settings, autofix)?;
+    let mut checks = check_path(path, &contents, tokens, &noqa_line_for, settings, autofix)?;

    // Apply autofix.
    if matches!(autofix, fixer::Mode::Apply) {
@@ -70,6 +119,7 @@ pub fn lint_path(
            kind: check.kind,
            fixed: check.fix.map(|fix| fix.applied).unwrap_or_default(),
            location: check.location,
+            end_location: check.end_location,
            filename: path.to_string_lossy().to_string(),
        })
        .collect();
@@ -78,18 +128,43 @@ pub fn lint_path(
    Ok(messages)
 }

+pub fn add_noqa_to_path(path: &Path, settings: &Settings) -> Result<usize> {
+    // Read the file from disk.
+    let contents = fs::read_file(path)?;
+
+    // Tokenize once.
+    let tokens: Vec<LexResult> = tokenize(&contents);
+
+    // Determine the noqa line for every line in the source.
+    let noqa_line_for = noqa::extract_noqa_line_for(&tokens);
+
+    // Generate checks.
+    let checks = check_path(
+        path,
+        &contents,
+        tokens,
+        &noqa_line_for,
+        settings,
+        &fixer::Mode::None,
+    )?;
+
+    add_noqa(&checks, &contents, &noqa_line_for, path)
+}
+
 #[cfg(test)]
 mod tests {
-    use std::collections::BTreeSet;
    use std::path::Path;

    use anyhow::Result;
+    use regex::Regex;
+    use rustpython_parser::lexer::LexResult;

    use crate::autofix::fixer;
    use crate::checks::{Check, CheckCode};
-    use crate::fs;
    use crate::linter;
+    use crate::linter::tokenize;
    use crate::settings;
+    use crate::{fs, noqa};

    fn check_path(
        path: &Path,
@@ -97,19 +172,16 @@ mod tests {
        autofix: &fixer::Mode,
    ) -> Result<Vec<Check>> {
        let contents = fs::read_file(path)?;
-        linter::check_path(path, &contents, settings, autofix)
+        let tokens: Vec<LexResult> = tokenize(&contents);
+        let noqa_line_for = noqa::extract_noqa_line_for(&tokens);
+        linter::check_path(path, &contents, tokens, &noqa_line_for, settings, autofix)
    }

    #[test]
    fn e402() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E402.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E402]),
-            },
+            &settings::Settings::for_rule(CheckCode::E402),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -121,12 +193,7 @@ mod tests {
    fn e501() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E501.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E501]),
-            },
+            &settings::Settings::for_rule(CheckCode::E501),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -138,12 +205,7 @@ mod tests {
    fn e711() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E711.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E711]),
-            },
+            &settings::Settings::for_rule(CheckCode::E711),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -155,12 +217,7 @@ mod tests {
    fn e712() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E712.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E712]),
-            },
+            &settings::Settings::for_rule(CheckCode::E712),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -172,12 +229,7 @@ mod tests {
    fn e713() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E713.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E713]),
-            },
+            &settings::Settings::for_rule(CheckCode::E713),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -189,12 +241,7 @@ mod tests {
    fn e721() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E721.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E721]),
-            },
+            &settings::Settings::for_rule(CheckCode::E721),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -206,12 +253,7 @@ mod tests {
    fn e722() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E722.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E722]),
-            },
+            &settings::Settings::for_rule(CheckCode::E722),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -223,12 +265,7 @@ mod tests {
    fn e714() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E714.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E714]),
-            },
+            &settings::Settings::for_rule(CheckCode::E714),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -240,12 +277,7 @@ mod tests {
    fn e731() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E731.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E731]),
-            },
+            &settings::Settings::for_rule(CheckCode::E731),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -257,12 +289,7 @@ mod tests {
    fn e741() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E741.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E741]),
-            },
+            &settings::Settings::for_rule(CheckCode::E741),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -274,12 +301,7 @@ mod tests {
    fn e742() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E742.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E742]),
-            },
+            &settings::Settings::for_rule(CheckCode::E742),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -291,12 +313,7 @@ mod tests {
    fn e743() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/E743.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::E743]),
-            },
+            &settings::Settings::for_rule(CheckCode::E743),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -308,12 +325,19 @@ mod tests {
    fn f401() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F401.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F401]),
-            },
+            &settings::Settings::for_rule(CheckCode::F401),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn f402() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/F402.py"),
+            &settings::Settings::for_rule(CheckCode::F402),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -325,12 +349,7 @@ mod tests {
    fn f403() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F403.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F403]),
-            },
+            &settings::Settings::for_rule(CheckCode::F403),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -342,12 +361,19 @@ mod tests {
    fn f404() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F404.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F404]),
-            },
+            &settings::Settings::for_rule(CheckCode::F404),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn f405() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/F405.py"),
+            &settings::Settings::for_rule(CheckCode::F405),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -359,12 +385,7 @@ mod tests {
    fn f406() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F406.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F406]),
-            },
+            &settings::Settings::for_rule(CheckCode::F406),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -376,12 +397,7 @@ mod tests {
    fn f407() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F407.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F407]),
-            },
+            &settings::Settings::for_rule(CheckCode::F407),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -393,12 +409,7 @@ mod tests {
    fn f541() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F541.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F541]),
-            },
+            &settings::Settings::for_rule(CheckCode::F541),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -410,12 +421,7 @@ mod tests {
    fn f601() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F601.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F601]),
-            },
+            &settings::Settings::for_rule(CheckCode::F601),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -427,12 +433,7 @@ mod tests {
    fn f602() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F602.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F602]),
-            },
+            &settings::Settings::for_rule(CheckCode::F602),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -444,12 +445,7 @@ mod tests {
    fn f622() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F622.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F622]),
-            },
+            &settings::Settings::for_rule(CheckCode::F622),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -461,12 +457,7 @@ mod tests {
    fn f631() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F631.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F631]),
-            },
+            &settings::Settings::for_rule(CheckCode::F631),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -478,12 +469,7 @@ mod tests {
    fn f632() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F632.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F632]),
-            },
+            &settings::Settings::for_rule(CheckCode::F632),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -495,12 +481,7 @@ mod tests {
    fn f633() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F633.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F633]),
-            },
+            &settings::Settings::for_rule(CheckCode::F633),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -512,12 +493,7 @@ mod tests {
    fn f634() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F634.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F634]),
-            },
+            &settings::Settings::for_rule(CheckCode::F634),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -529,12 +505,7 @@ mod tests {
    fn f701() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F701.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F701]),
-            },
+            &settings::Settings::for_rule(CheckCode::F701),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -546,12 +517,7 @@ mod tests {
    fn f702() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F702.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F702]),
-            },
+            &settings::Settings::for_rule(CheckCode::F702),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -563,12 +529,7 @@ mod tests {
    fn f704() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F704.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F704]),
-            },
+            &settings::Settings::for_rule(CheckCode::F704),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -580,12 +541,7 @@ mod tests {
    fn f706() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F706.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F706]),
-            },
+            &settings::Settings::for_rule(CheckCode::F706),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -597,12 +553,7 @@ mod tests {
    fn f707() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F707.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F707]),
-            },
+            &settings::Settings::for_rule(CheckCode::F707),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -614,12 +565,7 @@ mod tests {
    fn f722() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F722.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F722]),
-            },
+            &settings::Settings::for_rule(CheckCode::F722),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -631,12 +577,7 @@ mod tests {
    fn f821() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F821.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F821]),
-            },
+            &settings::Settings::for_rule(CheckCode::F821),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -648,12 +589,7 @@ mod tests {
    fn f822() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F822.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F822]),
-            },
+            &settings::Settings::for_rule(CheckCode::F822),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -665,12 +601,7 @@ mod tests {
    fn f823() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F823.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F823]),
-            },
+            &settings::Settings::for_rule(CheckCode::F823),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -682,12 +613,7 @@ mod tests {
    fn f831() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F831.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F831]),
-            },
+            &settings::Settings::for_rule(CheckCode::F831),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -697,13 +623,23 @@ mod tests {

    #[test]
    fn f841() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/F841.py"),
+            &settings::Settings::for_rule(CheckCode::F841),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn f841_dummy_variable_rgx() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F841.py"),
            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F841]),
+                dummy_variable_rgx: Regex::new(r"^z$").unwrap(),
+                ..settings::Settings::for_rule(CheckCode::F841)
            },
            &fixer::Mode::Generate,
        )?;
@@ -716,12 +652,19 @@ mod tests {
    fn f901() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/F901.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F901]),
-            },
+            &settings::Settings::for_rule(CheckCode::F901),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn m001() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/M001.py"),
+            &settings::Settings::for_rules(vec![CheckCode::M001, CheckCode::E501, CheckCode::F841]),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -733,12 +676,7 @@ mod tests {
    fn r001() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/R001.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::R001]),
-            },
+            &settings::Settings::for_rule(CheckCode::R001),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -750,12 +688,7 @@ mod tests {
    fn r002() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/R002.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::R002]),
-            },
+            &settings::Settings::for_rule(CheckCode::R002),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -767,12 +700,7 @@ mod tests {
    fn init() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/__init__.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F821, CheckCode::F822]),
-            },
+            &settings::Settings::for_rules(vec![CheckCode::F821, CheckCode::F822]),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
@@ -784,12 +712,67 @@ mod tests {
    fn future_annotations() -> Result<()> {
        let mut checks = check_path(
            Path::new("./resources/test/fixtures/future_annotations.py"),
-            &settings::Settings {
-                line_length: 88,
-                exclude: vec![],
-                extend_exclude: vec![],
-                select: BTreeSet::from([CheckCode::F401, CheckCode::F821]),
-            },
+            &settings::Settings::for_rules(vec![CheckCode::F401, CheckCode::F821]),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn e999() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/E999.py"),
+            &settings::Settings::for_rule(CheckCode::E999),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn a001() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/A001.py"),
+            &settings::Settings::for_rule(CheckCode::A001),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn a002() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/A002.py"),
+            &settings::Settings::for_rule(CheckCode::A002),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn a003() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/A003.py"),
+            &settings::Settings::for_rule(CheckCode::A003),
+            &fixer::Mode::Generate,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn spr001() -> Result<()> {
+        let mut checks = check_path(
+            Path::new("./resources/test/fixtures/SPR001.py"),
+            &settings::Settings::for_rule(CheckCode::SPR001),
            &fixer::Mode::Generate,
        )?;
        checks.sort_by_key(|check| check.location);
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,70 +1,95 @@
-use std::path::PathBuf;
+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::printer::{Printer, SerializationFormat};
-use ::ruff::settings::Settings;
+use ::ruff::pyproject::{self, StrCheckCodePair};
+use ::ruff::settings::CurrentSettings;
+use ::ruff::settings::{FilePattern, PerFileIgnore, Settings};
 use ::ruff::tell_user;

 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>,
+    /// 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.
-    #[clap(long, multiple = true)]
-    exclude: Vec<Pattern>,
+    #[arg(long, value_delimiter = ',')]
+    exclude: Vec<String>,
    /// Like --exclude, but adds additional files and directories on top of the excluded ones.
-    #[clap(long, multiple = true)]
-    extend_exclude: Vec<Pattern>,
+    #[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.
-    #[clap(long, arg_enum, default_value_t=SerializationFormat::Text)]
+    #[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")]
@@ -91,6 +116,22 @@ 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,
@@ -99,7 +140,7 @@ 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, &settings.extend_exclude))
        .collect();
@@ -110,16 +151,34 @@ 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| {
-                if settings.select.contains(&CheckCode::E999) {
-                    vec![Message {
-                        kind: CheckKind::SyntaxError(e.to_string()),
-                        fixed: false,
-                        location: Default::default(),
-                        filename: entry.path().to_string_lossy().to_string(),
-                    }]
+            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(),
+                            end_location: Default::default(),
+                            filename: path.to_string_lossy().to_string(),
+                        }]
+                    } else {
+                        error!("Failed to check {}: {message}", path.to_string_lossy());
+                        vec![]
+                    }
                } else {
-                    error!("Failed to check {}: {e:?}", entry.path().to_string_lossy());
+                    error!("{message}");
                    vec![]
                }
            })
@@ -127,19 +186,6 @@ fn run_once(
        .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);
@@ -147,37 +193,123 @@ fn run_once(
    Ok(messages)
 }

+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()
+        .flat_map(|path| iter_python_files(path, &settings.exclude, &settings.extend_exclude))
+        .collect();
+    let duration = start.elapsed();
+    debug!("Identified files to lint in: {:?}", duration);
+
+    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();
+
+    let duration = start.elapsed();
+    debug!("Added noqa to files in: {:?}", duration);
+
+    Ok(modifications)
+}
+
 fn inner_main() -> Result<ExitCode> {
    let cli = Cli::parse();

    set_up_logging(cli.verbose)?;

-    let mut settings = Settings::from_paths(&cli.files);
+    // 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..."),
+    };

-    let mut printer = Printer::new(cli.format);
+    // 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 !cli.extend_exclude.is_empty() {
-        settings.extend_exclude = cli.extend_exclude;
+    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 {
-            println!("Warning: --format 'text' is used in watch mode.");
+            eprintln!("Warning: --format 'text' is used in watch mode.");
        }

        // Perform an initial run instantly.
@@ -214,6 +346,11 @@ 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 {
@@ -234,6 +371,9 @@ 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
@@ -1,17 +1,20 @@
 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 {
    pub kind: CheckKind,
    pub fixed: bool,
    pub location: Location,
+    pub end_location: Location,
    pub filename: String,
 }

@@ -36,7 +39,7 @@ impl fmt::Display for Message {
        write!(
            f,
            "{}{}{}{}{}{} {} {}",
-            self.filename.white().bold(),
+            relativize_path(Path::new(&self.filename)).white().bold(),
            ":".cyan(),
            self.location.row(),
            ":".cyan(),
--- a/src/noqa.rs
+++ b/src/noqa.rs
@@ -0,0 +1,298 @@
+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, usize),
+    Codes(usize, 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(),
+                    noqa.end(),
+                    SPLIT_COMMA_REGEX
+                        .split(codes.as_str())
+                        .map(|code| code.trim())
+                        .filter(|code| !code.is_empty())
+                        .collect(),
+                ),
+                None => Directive::All(noqa.start(), noqa.end()),
+            },
+            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 crate::ast::types::Range;
+    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()),
+            Range {
+                location: Location::new(1, 1),
+                end_location: 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()),
+                Range {
+                    location: Location::new(1, 1),
+                    end_location: Location::new(1, 1),
+                },
+            ),
+            Check::new(
+                CheckKind::UnusedVariable("x".to_string()),
+                Range {
+                    location: Location::new(1, 1),
+                    end_location: 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()),
+                Range {
+                    location: Location::new(1, 1),
+                    end_location: Location::new(1, 1),
+                },
+            ),
+            Check::new(
+                CheckKind::UnusedVariable("x".to_string()),
+                Range {
+                    location: Location::new(1, 1),
+                    end_location: 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
@@ -1,8 +1,10 @@
-use colored::Colorize;
-
 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;

@@ -12,13 +14,25 @@ pub enum SerializationFormat {
    Json,
 }

+#[derive(Serialize)]
+struct ExpandedMessage<'a> {
+    kind: &'a CheckKind,
+    code: &'a CheckCode,
+    message: String,
+    fixed: bool,
+    location: Location,
+    end_location: Location,
+    filename: &'a String,
+}
+
 pub struct Printer {
    format: SerializationFormat,
+    verbose: bool,
 }

 impl Printer {
-    pub fn new(format: SerializationFormat) -> Self {
-        Self { format }
+    pub fn new(format: SerializationFormat, verbose: bool) -> Self {
+        Self { format, verbose }
    }

    pub fn write_once(&mut self, messages: &[Message]) -> Result<()> {
@@ -31,7 +45,23 @@ impl Printer {

        match self.format {
            SerializationFormat::Json => {
-                println!("{}", serde_json::to_string_pretty(&messages)?)
+                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,
+                                end_location: m.end_location,
+                                filename: &m.filename,
+                            })
+                            .collect::<Vec<_>>()
+                    )?
+                )
            }
            SerializationFormat::Text => {
                if !fixed.is_empty() {
@@ -40,7 +70,7 @@ impl Printer {
                        outstanding.len(),
                        fixed.len()
                    )
-                } else {
+                } else if !outstanding.is_empty() || self.verbose {
                    println!("Found {} error(s).", outstanding.len())
                }

--- a/src/pyproject.rs
+++ b/src/pyproject.rs
@@ -1,33 +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(paths: &[PathBuf]) -> Config {
-    match find_project_root(paths) {
-        Some(project_root) => match find_pyproject_toml(&project_root) {
-            Some(path) => {
-                debug!("Found pyproject.toml at: {:?}", path);
-                match parse_pyproject_toml(&path) {
-                    Ok(pyproject) => pyproject
-                        .tool
-                        .and_then(|tool| tool.ruff)
-                        .unwrap_or_default(),
-                    Err(e) => {
-                        println!("Failed to load pyproject.toml: {:?}", e);
-                        println!("Falling back to default configuration...");
-                        Default::default()
-                    }
-                }
-            }
-            None => Default::default(),
-        },
-        None => 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())
+        }
    }
 }

@@ -35,10 +28,54 @@ pub fn load_config(paths: &[PathBuf]) -> Config {
 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 pub struct Config {
    pub line_length: Option<usize>,
-    pub exclude: Option<Vec<PathBuf>>,
-    pub extend_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)]
@@ -56,20 +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(sources: &[PathBuf]) -> Option<PathBuf> {
-    if let Some(prefix) = common_path_all(sources.iter().map(PathBuf::as_path)) {
+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());
@@ -88,10 +139,13 @@ fn find_project_root(sources: &[PathBuf]) -> Option<PathBuf> {

 #[cfg(test)]
 mod tests {
-    use std::path::{Path, PathBuf};
+    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,
@@ -124,6 +178,8 @@ mod tests {
                    extend_exclude: None,
                    select: None,
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -144,6 +200,8 @@ line-length = 79
                    extend_exclude: None,
                    select: None,
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -160,10 +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,
                })
            })
        );
@@ -184,6 +244,8 @@ select = ["E501"]
                    extend_exclude: None,
                    select: Some(vec![CheckCode::E501]),
                    ignore: None,
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -204,6 +266,8 @@ ignore = ["E501"]
                    extend_exclude: None,
                    select: None,
                    ignore: Some(vec![CheckCode::E501]),
+                    per_file_ignores: None,
+                    dummy_variable_rgx: None,
                })
            })
        );
@@ -241,13 +305,15 @@ other-attribute = 1

    #[test]
    fn find_and_parse_pyproject_toml() -> Result<()> {
+        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, Path::new("resources/test/fixtures"));
+        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
@@ -260,58 +326,35 @@ other-attribute = 1
                line_length: Some(88),
                exclude: None,
                extend_exclude: Some(vec![
-                    Path::new("excluded.py").to_path_buf(),
-                    Path::new("migrations").to_path_buf(),
-                    Path::new("./resources/test/fixtures/directory/also_excluded.py").to_path_buf()
-                ]),
-                select: Some(vec![
-                    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::F403,
-                    CheckCode::F404,
-                    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::R001,
-                    CheckCode::R002,
+                    "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/typing.rs
+++ b/src/python/typing.rs
@@ -1,6 +1,7 @@
-use once_cell::sync::Lazy;
 use std::collections::BTreeSet;

+use once_cell::sync::Lazy;
+
 static ANNOTATED_SUBSCRIPTS: Lazy<BTreeSet<&'static str>> = Lazy::new(|| {
    BTreeSet::from([
        "AbstractAsyncContextManager",
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -1,57 +1,141 @@
 use std::collections::BTreeSet;
 use std::hash::{Hash, Hasher};
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};

+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 extend_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<Pattern>> = Lazy::new(|| {
+static DEFAULT_EXCLUDE: Lazy<Vec<FilePattern>> = Lazy::new(|| {
    vec![
-        Pattern::new(".bzr").unwrap(),
-        Pattern::new(".direnv").unwrap(),
-        Pattern::new(".eggs").unwrap(),
-        Pattern::new(".git").unwrap(),
-        Pattern::new(".hg").unwrap(),
-        Pattern::new(".mypy_cache").unwrap(),
-        Pattern::new(".nox").unwrap(),
-        Pattern::new(".pants.d").unwrap(),
-        Pattern::new(".ruff_cache").unwrap(),
-        Pattern::new(".svn").unwrap(),
-        Pattern::new(".tox").unwrap(),
-        Pattern::new(".venv").unwrap(),
-        Pattern::new("__pypackages__").unwrap(),
-        Pattern::new("_build").unwrap(),
-        Pattern::new("buck-out").unwrap(),
-        Pattern::new("build").unwrap(),
-        Pattern::new("dist").unwrap(),
-        Pattern::new("node_modules").unwrap(),
-        Pattern::new("venv").unwrap(),
+        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(paths: &[PathBuf]) -> Self {
-        let 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
@@ -59,9 +143,7 @@ impl Settings {
                .map(|paths| {
                    paths
                        .iter()
-                        .map(|path| {
-                            Pattern::new(&path.to_string_lossy()).expect("Invalid pattern.")
-                        })
+                        .map(|path| FilePattern::from_user(path, &project_root))
                        .collect()
                })
                .unwrap_or_else(|| DEFAULT_EXCLUDE.clone()),
@@ -70,67 +152,43 @@ impl Settings {
                .map(|paths| {
                    paths
                        .iter()
-                        .map(|path| {
-                            Pattern::new(&path.to_string_lossy()).expect("Invalid pattern.")
-                        })
+                        .map(|path| FilePattern::from_user(path, &project_root))
                        .collect()
                })
                .unwrap_or_default(),
-            select: BTreeSet::from_iter(config.select.unwrap_or_else(|| {
-                vec![
-                    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::F403,
-                    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,
-                    // Disable refactoring codes by default.
-                    // CheckCode::R001,
-                    // CheckCode::R002,
-                ]
-            })),
+            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);
        }
-        settings
+        Ok(settings)
+    }
+
+    pub fn clear(&mut self) {
+        self.select.clear();
    }

    pub fn select(&mut self, codes: Vec<CheckCode>) {
-        self.select.clear();
        for code in codes {
            self.select.insert(code);
        }
@@ -142,3 +200,62 @@ impl Settings {
        }
    }
 }
+
+/// 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 +1,167 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    BuiltinVariableShadowing: sum
+  location:
+    row: 1
+    column: 1
+  end_location:
+    row: 1
+    column: 19
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: int
+  location:
+    row: 2
+    column: 1
+  end_location:
+    row: 2
+    column: 30
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: print
+  location:
+    row: 4
+    column: 1
+  end_location:
+    row: 4
+    column: 6
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: copyright
+  location:
+    row: 5
+    column: 1
+  end_location:
+    row: 5
+    column: 10
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: complex
+  location:
+    row: 6
+    column: 2
+  end_location:
+    row: 6
+    column: 14
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: float
+  location:
+    row: 7
+    column: 1
+  end_location:
+    row: 7
+    column: 6
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: object
+  location:
+    row: 7
+    column: 9
+  end_location:
+    row: 7
+    column: 15
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: min
+  location:
+    row: 8
+    column: 1
+  end_location:
+    row: 8
+    column: 4
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: max
+  location:
+    row: 8
+    column: 6
+  end_location:
+    row: 8
+    column: 9
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: bytes
+  location:
+    row: 10
+    column: 1
+  end_location:
+    row: 13
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: slice
+  location:
+    row: 13
+    column: 1
+  end_location:
+    row: 16
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: ValueError
+  location:
+    row: 18
+    column: 1
+  end_location:
+    row: 21
+    column: 1
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: memoryview
+  location:
+    row: 21
+    column: 5
+  end_location:
+    row: 21
+    column: 15
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: bytearray
+  location:
+    row: 21
+    column: 18
+  end_location:
+    row: 21
+    column: 27
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: str
+  location:
+    row: 24
+    column: 22
+  end_location:
+    row: 24
+    column: 25
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: all
+  location:
+    row: 24
+    column: 45
+  end_location:
+    row: 24
+    column: 48
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: any
+  location:
+    row: 24
+    column: 50
+  end_location:
+    row: 24
+    column: 53
+  fix: ~
+- kind:
+    BuiltinVariableShadowing: sum
+  location:
+    row: 27
+    column: 8
+  end_location:
+    row: 27
+    column: 11
+  fix: ~
+
--- a/src/snapshots/rufflintertests__a002.snap
+++ b/src/snapshots/rufflintertests__a002.snap
@@ -0,0 +1,68 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    BuiltinArgumentShadowing: str
+  location:
+    row: 1
+    column: 11
+  end_location:
+    row: 1
+    column: 14
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: type
+  location:
+    row: 1
+    column: 19
+  end_location:
+    row: 1
+    column: 23
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: complex
+  location:
+    row: 1
+    column: 26
+  end_location:
+    row: 1
+    column: 33
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: Exception
+  location:
+    row: 1
+    column: 35
+  end_location:
+    row: 1
+    column: 44
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: getattr
+  location:
+    row: 1
+    column: 48
+  end_location:
+    row: 1
+    column: 55
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: bytes
+  location:
+    row: 5
+    column: 17
+  end_location:
+    row: 5
+    column: 22
+  fix: ~
+- kind:
+    BuiltinArgumentShadowing: float
+  location:
+    row: 9
+    column: 16
+  end_location:
+    row: 9
+    column: 21
+  fix: ~
+
--- a/src/snapshots/rufflintertests__a003.snap
+++ b/src/snapshots/rufflintertests__a003.snap
@@ -0,0 +1,23 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    BuiltinAttributeShadowing: ImportError
+  location:
+    row: 2
+    column: 5
+  end_location:
+    row: 2
+    column: 16
+  fix: ~
+- kind:
+    BuiltinAttributeShadowing: str
+  location:
+    row: 7
+    column: 5
+  end_location:
+    row: 9
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__e402.snap
+++ b/src/snapshots/rufflintertests__e402.snap
@@ -4,7 +4,10 @@ expression: checks
 ---
 - kind: ModuleImportNotAtTopOfFile
  location:
-    row: 20
+    row: 24
    column: 1
+  end_location:
+    row: 24
+    column: 9
  fix: ~

--- a/src/snapshots/rufflintertests__e501.snap
+++ b/src/snapshots/rufflintertests__e501.snap
@@ -8,6 +8,9 @@ expression: checks
      - 88
  location:
    row: 5
-    column: 89
+    column: 1
+  end_location:
+    row: 5
+    column: 124
  fix: ~

--- a/src/snapshots/rufflintertests__e711.snap
+++ b/src/snapshots/rufflintertests__e711.snap
@@ -7,47 +7,71 @@ expression: checks
  location:
    row: 2
    column: 11
+  end_location:
+    row: 2
+    column: 15
  fix: ~
 - kind:
    NoneComparison: NotEq
  location:
    row: 5
    column: 11
+  end_location:
+    row: 5
+    column: 15
  fix: ~
 - kind:
    NoneComparison: Eq
  location:
    row: 8
    column: 4
+  end_location:
+    row: 8
+    column: 8
  fix: ~
 - kind:
    NoneComparison: NotEq
  location:
    row: 11
    column: 4
+  end_location:
+    row: 11
+    column: 8
  fix: ~
 - kind:
    NoneComparison: Eq
  location:
    row: 14
    column: 14
+  end_location:
+    row: 14
+    column: 18
  fix: ~
 - kind:
    NoneComparison: NotEq
  location:
    row: 17
    column: 14
+  end_location:
+    row: 17
+    column: 18
  fix: ~
 - kind:
    NoneComparison: NotEq
  location:
    row: 20
    column: 4
+  end_location:
+    row: 20
+    column: 8
  fix: ~
 - kind:
    NoneComparison: Eq
  location:
    row: 23
    column: 4
+  end_location:
+    row: 23
+    column: 8
  fix: ~

--- a/src/snapshots/rufflintertests__e712.snap
+++ b/src/snapshots/rufflintertests__e712.snap
@@ -9,6 +9,9 @@ expression: checks
  location:
    row: 2
    column: 11
+  end_location:
+    row: 2
+    column: 15
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -17,6 +20,9 @@ expression: checks
  location:
    row: 5
    column: 11
+  end_location:
+    row: 5
+    column: 16
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -25,6 +31,9 @@ expression: checks
  location:
    row: 8
    column: 4
+  end_location:
+    row: 8
+    column: 8
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -33,6 +42,9 @@ expression: checks
  location:
    row: 11
    column: 4
+  end_location:
+    row: 11
+    column: 9
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -41,6 +53,9 @@ expression: checks
  location:
    row: 14
    column: 14
+  end_location:
+    row: 14
+    column: 18
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -49,6 +64,9 @@ expression: checks
  location:
    row: 17
    column: 14
+  end_location:
+    row: 17
+    column: 19
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -57,6 +75,9 @@ expression: checks
  location:
    row: 20
    column: 20
+  end_location:
+    row: 20
+    column: 24
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -65,6 +86,9 @@ expression: checks
  location:
    row: 20
    column: 44
+  end_location:
+    row: 20
+    column: 49
  fix: ~
 - kind:
    TrueFalseComparison:
@@ -73,5 +97,8 @@ expression: checks
  location:
    row: 22
    column: 5
+  end_location:
+    row: 22
+    column: 9
  fix: ~

--- a/src/snapshots/rufflintertests__e713.snap
+++ b/src/snapshots/rufflintertests__e713.snap
@@ -6,25 +6,40 @@ expression: checks
  location:
    row: 2
    column: 10
+  end_location:
+    row: 2
+    column: 14
  fix: ~
 - kind: NotInTest
  location:
    row: 5
    column: 12
+  end_location:
+    row: 5
+    column: 16
  fix: ~
 - kind: NotInTest
  location:
    row: 8
    column: 10
+  end_location:
+    row: 8
+    column: 14
  fix: ~
 - kind: NotInTest
  location:
    row: 11
    column: 25
+  end_location:
+    row: 11
+    column: 29
  fix: ~
 - kind: NotInTest
  location:
    row: 14
    column: 11
+  end_location:
+    row: 14
+    column: 15
  fix: ~

--- a/src/snapshots/rufflintertests__e714.snap
+++ b/src/snapshots/rufflintertests__e714.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 2
    column: 10
+  end_location:
+    row: 2
+    column: 14
  fix: ~
 - kind: NotIsTest
  location:
    row: 5
    column: 12
+  end_location:
+    row: 5
+    column: 16
  fix: ~
 - kind: NotIsTest
  location:
    row: 8
    column: 10
+  end_location:
+    row: 8
+    column: 23
  fix: ~

--- a/src/snapshots/rufflintertests__e721.snap
+++ b/src/snapshots/rufflintertests__e721.snap
@@ -6,80 +6,128 @@ expression: checks
  location:
    row: 2
    column: 14
+  end_location:
+    row: 2
+    column: 25
  fix: ~
 - kind: TypeComparison
  location:
    row: 5
    column: 14
+  end_location:
+    row: 5
+    column: 25
  fix: ~
 - kind: TypeComparison
  location:
    row: 10
    column: 8
+  end_location:
+    row: 10
+    column: 24
  fix: ~
 - kind: TypeComparison
  location:
    row: 15
    column: 14
+  end_location:
+    row: 15
+    column: 35
  fix: ~
 - kind: TypeComparison
  location:
    row: 18
    column: 18
+  end_location:
+    row: 18
+    column: 32
  fix: ~
 - kind: TypeComparison
  location:
    row: 18
    column: 46
+  end_location:
+    row: 18
+    column: 59
  fix: ~
 - kind: TypeComparison
  location:
    row: 20
    column: 18
+  end_location:
+    row: 20
+    column: 29
  fix: ~
 - kind: TypeComparison
  location:
    row: 22
    column: 18
+  end_location:
+    row: 22
+    column: 29
  fix: ~
 - kind: TypeComparison
  location:
    row: 24
    column: 18
+  end_location:
+    row: 24
+    column: 31
  fix: ~
 - kind: TypeComparison
  location:
    row: 26
    column: 18
+  end_location:
+    row: 26
+    column: 30
  fix: ~
 - kind: TypeComparison
  location:
    row: 28
    column: 18
+  end_location:
+    row: 28
+    column: 31
  fix: ~
 - kind: TypeComparison
  location:
    row: 30
    column: 18
+  end_location:
+    row: 30
+    column: 31
  fix: ~
 - kind: TypeComparison
  location:
    row: 32
    column: 18
+  end_location:
+    row: 32
+    column: 35
  fix: ~
 - kind: TypeComparison
  location:
    row: 34
    column: 18
+  end_location:
+    row: 38
+    column: 2
  fix: ~
 - kind: TypeComparison
  location:
    row: 40
    column: 18
+  end_location:
+    row: 40
+    column: 29
  fix: ~
 - kind: TypeComparison
  location:
    row: 42
    column: 18
+  end_location:
+    row: 42
+    column: 31
  fix: ~

--- a/src/snapshots/rufflintertests__e722.snap
+++ b/src/snapshots/rufflintertests__e722.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 4
    column: 1
+  end_location:
+    row: 7
+    column: 1
  fix: ~
 - kind: DoNotUseBareExcept
  location:
    row: 11
    column: 1
+  end_location:
+    row: 14
+    column: 1
  fix: ~
 - kind: DoNotUseBareExcept
  location:
    row: 16
    column: 1
+  end_location:
+    row: 19
+    column: 1
  fix: ~

--- a/src/snapshots/rufflintertests__e731.snap
+++ b/src/snapshots/rufflintertests__e731.snap
@@ -6,25 +6,40 @@ expression: checks
  location:
    row: 2
    column: 1
+  end_location:
+    row: 2
+    column: 20
  fix: ~
 - kind: DoNotAssignLambda
  location:
    row: 4
    column: 1
+  end_location:
+    row: 4
+    column: 20
  fix: ~
 - kind: DoNotAssignLambda
  location:
    row: 7
    column: 5
+  end_location:
+    row: 7
+    column: 30
  fix: ~
 - kind: DoNotAssignLambda
  location:
    row: 12
    column: 1
+  end_location:
+    row: 12
+    column: 28
  fix: ~
 - kind: DoNotAssignLambda
  location:
    row: 16
    column: 1
+  end_location:
+    row: 16
+    column: 26
  fix: ~

--- a/src/snapshots/rufflintertests__e741.snap
+++ b/src/snapshots/rufflintertests__e741.snap
@@ -7,149 +7,224 @@ expression: checks
  location:
    row: 3
    column: 1
+  end_location:
+    row: 3
+    column: 2
  fix: ~
 - kind:
    AmbiguousVariableName: I
  location:
    row: 4
    column: 1
+  end_location:
+    row: 4
+    column: 2
  fix: ~
 - kind:
    AmbiguousVariableName: O
  location:
    row: 5
    column: 1
+  end_location:
+    row: 5
+    column: 2
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 6
    column: 1
+  end_location:
+    row: 6
+    column: 2
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 8
    column: 4
+  end_location:
+    row: 8
+    column: 5
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 9
    column: 5
+  end_location:
+    row: 9
+    column: 6
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 10
    column: 5
+  end_location:
+    row: 10
+    column: 6
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 11
    column: 5
+  end_location:
+    row: 11
+    column: 6
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 16
    column: 5
+  end_location:
+    row: 16
+    column: 6
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 20
    column: 8
+  end_location:
+    row: 20
+    column: 9
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 25
    column: 5
+  end_location:
+    row: 25
+    column: 13
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 26
    column: 5
+  end_location:
+    row: 26
+    column: 6
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 30
    column: 5
+  end_location:
+    row: 30
+    column: 6
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 33
    column: 9
+  end_location:
+    row: 33
+    column: 19
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 34
    column: 9
+  end_location:
+    row: 34
+    column: 10
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 40
    column: 8
+  end_location:
+    row: 40
+    column: 9
  fix: ~
 - kind:
    AmbiguousVariableName: I
  location:
    row: 40
    column: 14
+  end_location:
+    row: 40
+    column: 15
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 44
    column: 8
+  end_location:
+    row: 44
+    column: 9
  fix: ~
 - kind:
    AmbiguousVariableName: I
  location:
    row: 44
    column: 16
+  end_location:
+    row: 44
+    column: 17
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 48
    column: 9
+  end_location:
+    row: 48
+    column: 10
  fix: ~
 - kind:
    AmbiguousVariableName: I
  location:
    row: 48
    column: 14
+  end_location:
+    row: 48
+    column: 15
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 57
    column: 16
+  end_location:
+    row: 57
+    column: 17
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 66
    column: 20
+  end_location:
+    row: 66
+    column: 21
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 71
    column: 1
+  end_location:
+    row: 74
+    column: 1
  fix: ~
 - kind:
    AmbiguousVariableName: l
  location:
    row: 74
    column: 5
+  end_location:
+    row: 74
+    column: 11
  fix: ~

--- a/src/snapshots/rufflintertests__e742.snap
+++ b/src/snapshots/rufflintertests__e742.snap
@@ -7,17 +7,26 @@ expression: checks
  location:
    row: 1
    column: 1
+  end_location:
+    row: 5
+    column: 1
  fix: ~
 - kind:
    AmbiguousClassName: I
  location:
    row: 5
    column: 1
+  end_location:
+    row: 9
+    column: 1
  fix: ~
 - kind:
    AmbiguousClassName: O
  location:
    row: 9
    column: 1
+  end_location:
+    row: 13
+    column: 1
  fix: ~

--- a/src/snapshots/rufflintertests__e743.snap
+++ b/src/snapshots/rufflintertests__e743.snap
@@ -7,17 +7,26 @@ expression: checks
  location:
    row: 1
    column: 1
+  end_location:
+    row: 5
+    column: 1
  fix: ~
 - kind:
    AmbiguousFunctionName: I
  location:
    row: 5
    column: 1
+  end_location:
+    row: 9
+    column: 1
  fix: ~
 - kind:
    AmbiguousFunctionName: O
  location:
    row: 10
    column: 5
+  end_location:
+    row: 14
+    column: 1
  fix: ~

--- a/src/snapshots/rufflintertests__e999.snap
+++ b/src/snapshots/rufflintertests__e999.snap
@@ -0,0 +1,14 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    SyntaxError: Got unexpected EOF
+  location:
+    row: 2
+    column: 1
+  end_location:
+    row: 2
+    column: 1
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f401.snap
+++ b/src/snapshots/rufflintertests__f401.snap
@@ -7,17 +7,26 @@ expression: checks
  location:
    row: 3
    column: 1
+  end_location:
+    row: 3
+    column: 17
  fix: ~
 - kind:
    UnusedImport: collections.OrderedDict
  location:
    row: 5
    column: 1
+  end_location:
+    row: 9
+    column: 2
  fix: ~
 - kind:
    UnusedImport: logging.handlers
  location:
    row: 13
    column: 1
+  end_location:
+    row: 13
+    column: 24
  fix: ~

--- a/src/snapshots/rufflintertests__f402.snap
+++ b/src/snapshots/rufflintertests__f402.snap
@@ -0,0 +1,27 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ImportShadowedByLoopVar:
+      - os
+      - 1
+  location:
+    row: 5
+    column: 5
+  end_location:
+    row: 5
+    column: 7
+  fix: ~
+- kind:
+    ImportShadowedByLoopVar:
+      - path
+      - 2
+  location:
+    row: 8
+    column: 5
+  end_location:
+    row: 8
+    column: 9
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f403.snap
+++ b/src/snapshots/rufflintertests__f403.snap
@@ -3,15 +3,21 @@ source: src/linter.rs
 expression: checks
 ---
 - kind:
-    ImportStarUsage: F634
+    ImportStarUsed: F634
  location:
    row: 1
    column: 1
+  end_location:
+    row: 1
+    column: 19
  fix: ~
 - kind:
-    ImportStarUsage: F634
+    ImportStarUsed: F634
  location:
    row: 2
    column: 1
+  end_location:
+    row: 2
+    column: 19
  fix: ~

--- a/src/snapshots/rufflintertests__f404.snap
+++ b/src/snapshots/rufflintertests__f404.snap
@@ -6,5 +6,8 @@ expression: checks
  location:
    row: 7
    column: 1
+  end_location:
+    row: 7
+    column: 38
  fix: ~

--- a/src/snapshots/rufflintertests__f405.snap
+++ b/src/snapshots/rufflintertests__f405.snap
@@ -0,0 +1,27 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    ImportStarUsage:
+      - name
+      - mymodule
+  location:
+    row: 5
+    column: 11
+  end_location:
+    row: 5
+    column: 15
+  fix: ~
+- kind:
+    ImportStarUsage:
+      - a
+      - mymodule
+  location:
+    row: 11
+    column: 1
+  end_location:
+    row: 11
+    column: 8
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f406.snap
+++ b/src/snapshots/rufflintertests__f406.snap
@@ -7,11 +7,17 @@ expression: checks
  location:
    row: 5
    column: 5
+  end_location:
+    row: 5
+    column: 23
  fix: ~
 - kind:
    ImportStarNotPermitted: F634
  location:
    row: 9
    column: 5
+  end_location:
+    row: 9
+    column: 23
  fix: ~

--- a/src/snapshots/rufflintertests__f407.snap
+++ b/src/snapshots/rufflintertests__f407.snap
@@ -7,5 +7,8 @@ expression: checks
  location:
    row: 2
    column: 1
+  end_location:
+    row: 2
+    column: 44
  fix: ~

--- a/src/snapshots/rufflintertests__f541.snap
+++ b/src/snapshots/rufflintertests__f541.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 4
    column: 7
+  end_location:
+    row: 4
+    column: 11
  fix: ~
 - kind: FStringMissingPlaceholders
  location:
    row: 5
    column: 7
+  end_location:
+    row: 5
+    column: 11
  fix: ~
 - kind: FStringMissingPlaceholders
  location:
    row: 7
    column: 7
+  end_location:
+    row: 7
+    column: 11
  fix: ~

--- a/src/snapshots/rufflintertests__f601.snap
+++ b/src/snapshots/rufflintertests__f601.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 3
    column: 6
+  end_location:
+    row: 3
+    column: 8
  fix: ~
 - kind: MultiValueRepeatedKeyLiteral
  location:
    row: 9
    column: 5
+  end_location:
+    row: 9
+    column: 6
  fix: ~
 - kind: MultiValueRepeatedKeyLiteral
  location:
    row: 11
    column: 7
+  end_location:
+    row: 11
+    column: 11
  fix: ~

--- a/src/snapshots/rufflintertests__f602.snap
+++ b/src/snapshots/rufflintertests__f602.snap
@@ -7,5 +7,8 @@ expression: checks
  location:
    row: 5
    column: 5
+  end_location:
+    row: 5
+    column: 6
  fix: ~

--- a/src/snapshots/rufflintertests__f622.snap
+++ b/src/snapshots/rufflintertests__f622.snap
@@ -6,5 +6,8 @@ expression: checks
  location:
    row: 1
    column: 1
+  end_location:
+    row: 1
+    column: 10
  fix: ~

--- a/src/snapshots/rufflintertests__f631.snap
+++ b/src/snapshots/rufflintertests__f631.snap
@@ -6,10 +6,16 @@ expression: checks
  location:
    row: 1
    column: 1
+  end_location:
+    row: 1
+    column: 20
  fix: ~
 - kind: AssertTuple
  location:
    row: 2
    column: 1
+  end_location:
+    row: 2
+    column: 16
  fix: ~

--- a/src/snapshots/rufflintertests__f632.snap
+++ b/src/snapshots/rufflintertests__f632.snap
@@ -6,10 +6,16 @@ expression: checks
  location:
    row: 1
    column: 6
+  end_location:
+    row: 1
+    column: 14
  fix: ~
 - kind: IsLiteral
  location:
    row: 4
    column: 8
+  end_location:
+    row: 4
+    column: 16
  fix: ~

--- a/src/snapshots/rufflintertests__f633.snap
+++ b/src/snapshots/rufflintertests__f633.snap
@@ -6,5 +6,8 @@ expression: checks
  location:
    row: 4
    column: 1
+  end_location:
+    row: 4
+    column: 6
  fix: ~

--- a/src/snapshots/rufflintertests__f634.snap
+++ b/src/snapshots/rufflintertests__f634.snap
@@ -6,10 +6,16 @@ expression: checks
  location:
    row: 1
    column: 1
+  end_location:
+    row: 4
+    column: 1
  fix: ~
 - kind: IfTuple
  location:
    row: 7
    column: 5
+  end_location:
+    row: 9
+    column: 5
  fix: ~

--- a/src/snapshots/rufflintertests__f701.snap
+++ b/src/snapshots/rufflintertests__f701.snap
@@ -6,20 +6,32 @@ expression: checks
  location:
    row: 4
    column: 5
+  end_location:
+    row: 4
+    column: 10
  fix: ~
 - kind: BreakOutsideLoop
  location:
    row: 16
    column: 5
+  end_location:
+    row: 16
+    column: 10
  fix: ~
 - kind: BreakOutsideLoop
  location:
    row: 20
    column: 5
+  end_location:
+    row: 20
+    column: 10
  fix: ~
 - kind: BreakOutsideLoop
  location:
    row: 23
    column: 1
+  end_location:
+    row: 23
+    column: 6
  fix: ~

--- a/src/snapshots/rufflintertests__f702.snap
+++ b/src/snapshots/rufflintertests__f702.snap
@@ -6,20 +6,32 @@ expression: checks
  location:
    row: 4
    column: 5
+  end_location:
+    row: 4
+    column: 13
  fix: ~
 - kind: ContinueOutsideLoop
  location:
    row: 16
    column: 5
+  end_location:
+    row: 16
+    column: 13
  fix: ~
 - kind: ContinueOutsideLoop
  location:
    row: 20
    column: 5
+  end_location:
+    row: 20
+    column: 13
  fix: ~
 - kind: ContinueOutsideLoop
  location:
    row: 23
    column: 1
+  end_location:
+    row: 23
+    column: 9
  fix: ~

--- a/src/snapshots/rufflintertests__f704.snap
+++ b/src/snapshots/rufflintertests__f704.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 6
    column: 5
+  end_location:
+    row: 6
+    column: 12
  fix: ~
 - kind: YieldOutsideFunction
  location:
    row: 9
    column: 1
+  end_location:
+    row: 9
+    column: 8
  fix: ~
 - kind: YieldOutsideFunction
  location:
    row: 10
    column: 1
+  end_location:
+    row: 10
+    column: 13
  fix: ~

--- a/src/snapshots/rufflintertests__f706.snap
+++ b/src/snapshots/rufflintertests__f706.snap
@@ -6,10 +6,16 @@ expression: checks
  location:
    row: 6
    column: 5
+  end_location:
+    row: 6
+    column: 13
  fix: ~
 - kind: ReturnOutsideFunction
  location:
    row: 9
    column: 1
+  end_location:
+    row: 9
+    column: 9
  fix: ~

--- a/src/snapshots/rufflintertests__f707.snap
+++ b/src/snapshots/rufflintertests__f707.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 3
    column: 1
+  end_location:
+    row: 5
+    column: 1
  fix: ~
 - kind: DefaultExceptNotLast
  location:
    row: 10
    column: 1
+  end_location:
+    row: 12
+    column: 1
  fix: ~
 - kind: DefaultExceptNotLast
  location:
    row: 19
    column: 1
+  end_location:
+    row: 21
+    column: 1
  fix: ~

--- a/src/snapshots/rufflintertests__f722.snap
+++ b/src/snapshots/rufflintertests__f722.snap
@@ -7,5 +7,8 @@ expression: checks
  location:
    row: 9
    column: 13
+  end_location:
+    row: 9
+    column: 17
  fix: ~

--- a/src/snapshots/rufflintertests__f821.snap
+++ b/src/snapshots/rufflintertests__f821.snap
@@ -7,35 +7,71 @@ expression: checks
  location:
    row: 2
    column: 12
+  end_location:
+    row: 2
+    column: 16
  fix: ~
 - kind:
    UndefinedName: self
  location:
    row: 6
    column: 13
+  end_location:
+    row: 6
+    column: 17
  fix: ~
 - kind:
    UndefinedName: self
  location:
    row: 10
    column: 9
+  end_location:
+    row: 10
+    column: 13
  fix: ~
 - kind:
    UndefinedName: numeric_string
  location:
    row: 21
    column: 12
+  end_location:
+    row: 21
+    column: 26
  fix: ~
 - kind:
    UndefinedName: Bar
  location:
    row: 58
    column: 5
+  end_location:
+    row: 58
+    column: 9
  fix: ~
 - kind:
    UndefinedName: TOMATO
  location:
    row: 83
    column: 11
+  end_location:
+    row: 83
+    column: 17
+  fix: ~
+- kind:
+    UndefinedName: B
+  location:
+    row: 87
+    column: 7
+  end_location:
+    row: 87
+    column: 11
+  fix: ~
+- kind:
+    UndefinedName: B
+  location:
+    row: 89
+    column: 7
+  end_location:
+    row: 89
+    column: 9
  fix: ~

--- a/src/snapshots/rufflintertests__f822.snap
+++ b/src/snapshots/rufflintertests__f822.snap
@@ -7,5 +7,8 @@ expression: checks
  location:
    row: 3
    column: 1
+  end_location:
+    row: 3
+    column: 8
  fix: ~

--- a/src/snapshots/rufflintertests__f823.snap
+++ b/src/snapshots/rufflintertests__f823.snap
@@ -7,5 +7,8 @@ expression: checks
  location:
    row: 6
    column: 5
+  end_location:
+    row: 6
+    column: 11
  fix: ~

--- a/src/snapshots/rufflintertests__f831.snap
+++ b/src/snapshots/rufflintertests__f831.snap
@@ -6,15 +6,24 @@ expression: checks
  location:
    row: 1
    column: 25
+  end_location:
+    row: 1
+    column: 31
  fix: ~
 - kind: DuplicateArgumentName
  location:
    row: 5
    column: 28
+  end_location:
+    row: 5
+    column: 34
  fix: ~
 - kind: DuplicateArgumentName
  location:
    row: 9
    column: 27
+  end_location:
+    row: 9
+    column: 33
  fix: ~

--- a/src/snapshots/rufflintertests__f841.snap
+++ b/src/snapshots/rufflintertests__f841.snap
@@ -7,29 +7,44 @@ expression: checks
  location:
    row: 3
    column: 1
+  end_location:
+    row: 7
+    column: 1
  fix: ~
 - kind:
    UnusedVariable: z
  location:
    row: 16
    column: 5
+  end_location:
+    row: 16
+    column: 6
  fix: ~
 - kind:
    UnusedVariable: foo
  location:
    row: 20
    column: 5
+  end_location:
+    row: 20
+    column: 8
  fix: ~
 - kind:
    UnusedVariable: a
  location:
    row: 21
    column: 6
+  end_location:
+    row: 21
+    column: 7
  fix: ~
 - kind:
    UnusedVariable: b
  location:
    row: 21
    column: 9
+  end_location:
+    row: 21
+    column: 10
  fix: ~

--- a/src/snapshots/rufflintertests__f841_dummy_variable_rgx.snap
+++ b/src/snapshots/rufflintertests__f841_dummy_variable_rgx.snap
@@ -0,0 +1,68 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    UnusedVariable: e
+  location:
+    row: 3
+    column: 1
+  end_location:
+    row: 7
+    column: 1
+  fix: ~
+- kind:
+    UnusedVariable: foo
+  location:
+    row: 20
+    column: 5
+  end_location:
+    row: 20
+    column: 8
+  fix: ~
+- kind:
+    UnusedVariable: a
+  location:
+    row: 21
+    column: 6
+  end_location:
+    row: 21
+    column: 7
+  fix: ~
+- kind:
+    UnusedVariable: b
+  location:
+    row: 21
+    column: 9
+  end_location:
+    row: 21
+    column: 10
+  fix: ~
+- kind:
+    UnusedVariable: _
+  location:
+    row: 35
+    column: 5
+  end_location:
+    row: 35
+    column: 6
+  fix: ~
+- kind:
+    UnusedVariable: __
+  location:
+    row: 36
+    column: 5
+  end_location:
+    row: 36
+    column: 7
+  fix: ~
+- kind:
+    UnusedVariable: _discarded
+  location:
+    row: 37
+    column: 5
+  end_location:
+    row: 37
+    column: 15
+  fix: ~
+
--- a/src/snapshots/rufflintertests__f901.snap
+++ b/src/snapshots/rufflintertests__f901.snap
@@ -5,11 +5,17 @@ expression: checks
 - kind: RaiseNotImplemented
  location:
    row: 2
-    column: 25
+    column: 11
+  end_location:
+    row: 2
+    column: 27
  fix: ~
 - kind: RaiseNotImplemented
  location:
    row: 6
    column: 11
+  end_location:
+    row: 6
+    column: 25
  fix: ~

--- a/src/snapshots/rufflintertests__future_annotations.snap
+++ b/src/snapshots/rufflintertests__future_annotations.snap
@@ -7,11 +7,17 @@ expression: checks
  location:
    row: 5
    column: 1
+  end_location:
+    row: 5
+    column: 30
  fix: ~
 - kind:
    UndefinedName: Bar
  location:
    row: 22
    column: 19
+  end_location:
+    row: 22
+    column: 22
  fix: ~

--- a/src/snapshots/rufflintertests__m001.snap
+++ b/src/snapshots/rufflintertests__m001.snap
@@ -0,0 +1,107 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    UnusedNOQA: ~
+  location:
+    row: 9
+    column: 10
+  end_location:
+    row: 9
+    column: 18
+  fix:
+    content: ""
+    location:
+      row: 9
+      column: 10
+    end_location:
+      row: 9
+      column: 18
+    applied: false
+- kind:
+    UnusedNOQA: E501
+  location:
+    row: 13
+    column: 10
+  end_location:
+    row: 13
+    column: 24
+  fix:
+    content: ""
+    location:
+      row: 13
+      column: 10
+    end_location:
+      row: 13
+      column: 24
+    applied: false
+- kind:
+    UnusedNOQA: E501
+  location:
+    row: 16
+    column: 10
+  end_location:
+    row: 16
+    column: 30
+  fix:
+    content: "  # noqa: F841"
+    location:
+      row: 16
+      column: 10
+    end_location:
+      row: 16
+      column: 30
+    applied: false
+- kind:
+    UnusedNOQA: F841
+  location:
+    row: 41
+    column: 4
+  end_location:
+    row: 41
+    column: 24
+  fix:
+    content: "  # noqa: E501"
+    location:
+      row: 41
+      column: 4
+    end_location:
+      row: 41
+      column: 24
+    applied: false
+- kind:
+    UnusedNOQA: E501
+  location:
+    row: 49
+    column: 4
+  end_location:
+    row: 49
+    column: 18
+  fix:
+    content: ""
+    location:
+      row: 49
+      column: 4
+    end_location:
+      row: 49
+      column: 18
+    applied: false
+- kind:
+    UnusedNOQA: ~
+  location:
+    row: 57
+    column: 4
+  end_location:
+    row: 57
+    column: 12
+  fix:
+    content: ""
+    location:
+      row: 57
+      column: 4
+    end_location:
+      row: 57
+      column: 12
+    applied: false
+
--- a/src/snapshots/rufflintertests__r001.snap
+++ b/src/snapshots/rufflintertests__r001.snap
@@ -7,12 +7,15 @@ expression: checks
  location:
    row: 5
    column: 9
+  end_location:
+    row: 5
+    column: 15
  fix:
    content: ""
-    start:
+    location:
      row: 5
      column: 8
-    end:
+    end_location:
      row: 5
      column: 16
    applied: false
@@ -21,12 +24,15 @@ expression: checks
  location:
    row: 10
    column: 5
+  end_location:
+    row: 10
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 9
      column: 8
-    end:
+    end_location:
      row: 11
      column: 2
    applied: false
@@ -35,12 +41,15 @@ expression: checks
  location:
    row: 16
    column: 5
+  end_location:
+    row: 16
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 15
      column: 8
-    end:
+    end_location:
      row: 18
      column: 2
    applied: false
@@ -49,12 +58,15 @@ expression: checks
  location:
    row: 24
    column: 5
+  end_location:
+    row: 24
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 22
      column: 8
-    end:
+    end_location:
      row: 25
      column: 2
    applied: false
@@ -63,12 +75,15 @@ expression: checks
  location:
    row: 31
    column: 5
+  end_location:
+    row: 31
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 29
      column: 8
-    end:
+    end_location:
      row: 32
      column: 2
    applied: false
@@ -77,12 +92,15 @@ expression: checks
  location:
    row: 37
    column: 5
+  end_location:
+    row: 37
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 36
      column: 8
-    end:
+    end_location:
      row: 39
      column: 2
    applied: false
@@ -91,12 +109,15 @@ expression: checks
  location:
    row: 45
    column: 5
+  end_location:
+    row: 45
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 43
      column: 8
-    end:
+    end_location:
      row: 47
      column: 2
    applied: false
@@ -105,12 +126,15 @@ expression: checks
  location:
    row: 53
    column: 5
+  end_location:
+    row: 53
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 51
      column: 8
-    end:
+    end_location:
      row: 55
      column: 2
    applied: false
@@ -119,12 +143,15 @@ expression: checks
  location:
    row: 61
    column: 5
+  end_location:
+    row: 61
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 59
      column: 8
-    end:
+    end_location:
      row: 63
      column: 2
    applied: false
@@ -133,12 +160,15 @@ expression: checks
  location:
    row: 69
    column: 5
+  end_location:
+    row: 69
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 67
      column: 8
-    end:
+    end_location:
      row: 71
      column: 2
    applied: false
@@ -147,12 +177,15 @@ expression: checks
  location:
    row: 75
    column: 12
+  end_location:
+    row: 75
+    column: 18
  fix:
    content: ""
-    start:
+    location:
      row: 75
      column: 10
-    end:
+    end_location:
      row: 75
      column: 18
    applied: false
@@ -161,12 +194,15 @@ expression: checks
  location:
    row: 79
    column: 9
+  end_location:
+    row: 79
+    column: 15
  fix:
    content: ""
-    start:
+    location:
      row: 79
      column: 9
-    end:
+    end_location:
      row: 79
      column: 17
    applied: false
@@ -175,12 +211,15 @@ expression: checks
  location:
    row: 84
    column: 5
+  end_location:
+    row: 84
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 84
      column: 5
-    end:
+    end_location:
      row: 85
      column: 5
    applied: false
@@ -189,12 +228,15 @@ expression: checks
  location:
    row: 92
    column: 5
+  end_location:
+    row: 92
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 91
      column: 6
-    end:
+    end_location:
      row: 92
      column: 11
    applied: false
@@ -203,12 +245,15 @@ expression: checks
  location:
    row: 98
    column: 5
+  end_location:
+    row: 98
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 98
      column: 5
-    end:
+    end_location:
      row: 100
      column: 5
    applied: false
@@ -217,12 +262,15 @@ expression: checks
  location:
    row: 108
    column: 5
+  end_location:
+    row: 108
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 107
      column: 6
-    end:
+    end_location:
      row: 108
      column: 11
    applied: false
@@ -231,12 +279,15 @@ expression: checks
  location:
    row: 114
    column: 13
+  end_location:
+    row: 114
+    column: 19
  fix:
    content: ""
-    start:
+    location:
      row: 114
      column: 12
-    end:
+    end_location:
      row: 114
      column: 20
    applied: false
@@ -245,12 +296,15 @@ expression: checks
  location:
    row: 119
    column: 5
+  end_location:
+    row: 119
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 118
      column: 8
-    end:
+    end_location:
      row: 120
      column: 2
    applied: false
@@ -259,12 +313,15 @@ expression: checks
  location:
    row: 125
    column: 5
+  end_location:
+    row: 125
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 124
      column: 8
-    end:
+    end_location:
      row: 126
      column: 2
    applied: false
@@ -273,12 +330,15 @@ expression: checks
  location:
    row: 131
    column: 5
+  end_location:
+    row: 131
+    column: 11
  fix:
    content: ""
-    start:
+    location:
      row: 130
      column: 8
-    end:
+    end_location:
      row: 133
      column: 2
    applied: false
--- a/src/snapshots/rufflintertests__r002.snap
+++ b/src/snapshots/rufflintertests__r002.snap
@@ -5,27 +5,33 @@ expression: checks
 - kind: NoAssertEquals
  location:
    row: 1
-    column: 5
+    column: 1
+  end_location:
+    row: 1
+    column: 18
  fix:
    content: assertEqual
-    start:
+    location:
      row: 1
-      column: 6
-    end:
+      column: 2
+    end_location:
      row: 1
-      column: 18
+      column: 14
    applied: false
 - kind: NoAssertEquals
  location:
    row: 2
-    column: 5
+    column: 1
+  end_location:
+    row: 2
+    column: 18
  fix:
    content: assertEqual
-    start:
+    location:
      row: 2
-      column: 6
-    end:
+      column: 2
+    end_location:
      row: 2
-      column: 18
+      column: 14
    applied: false

--- a/src/snapshots/rufflintertests__spr001.snap
+++ b/src/snapshots/rufflintertests__spr001.snap
@@ -0,0 +1,53 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: SuperCallWithParameters
+  location:
+    row: 17
+    column: 18
+  end_location:
+    row: 17
+    column: 36
+  fix:
+    content: super()
+    location:
+      row: 17
+      column: 18
+    end_location:
+      row: 17
+      column: 36
+    applied: false
+- kind: SuperCallWithParameters
+  location:
+    row: 18
+    column: 9
+  end_location:
+    row: 18
+    column: 27
+  fix:
+    content: super()
+    location:
+      row: 18
+      column: 9
+    end_location:
+      row: 18
+      column: 27
+    applied: false
+- kind: SuperCallWithParameters
+  location:
+    row: 19
+    column: 9
+  end_location:
+    row: 22
+    column: 10
+  fix:
+    content: super()
+    location:
+      row: 19
+      column: 9
+    end_location:
+      row: 22
+      column: 10
+    applied: false
+
Author	SHA1	Message	Date
Charlie Marsh	4819e19ba2	Bump version to 0.0.50	2022-10-02 20:43:30 -04:00
Charlie Marsh	622b8adb79	Avoid falling back to A003 when A001 is disabled (#302 )	2022-10-02 20:43:12 -04:00
Charlie Marsh	558d9fcbe3	Enable LibCST-based autofixing for SPR001 (#297 )	2022-10-02 19:58:13 -04:00
Charlie Marsh	83f18193c2	Add an end location to Check (#299 )	2022-10-02 12:50:42 -04:00
Charlie Marsh	46e6a1b3be	Add end locations to all nodes (#296 )	2022-10-02 12:49:48 -04:00
Suguru Yamamoto	4d0d433af9	fix: Make assigns to dunder exception for E402. (#294 )	2022-10-01 09:43:47 -04:00
Christian Clauss	11f7532e72	pre-commit: Validate pyproject.toml (#266 )	2022-09-30 19:21:12 -04:00
Charlie Marsh	417764d309	Expose a public 'check' method (#289 )	2022-09-30 11:30:37 -04:00
Charlie Marsh	1e36c109c6	Bump version to 0.0.49	2022-09-30 09:15:32 -04:00
Nikita Sobolev	3960016d55	Create .editorconfig (#290 )	2022-09-30 09:15:08 -04:00
Charlie Marsh	75d669fa86	Update check ordering	2022-09-30 09:14:41 -04:00
Nikita Sobolev	20989e12ba	Implement `flake8-super` check (#291 )	2022-09-30 09:12:09 -04:00
Charlie Marsh	5a1b6c32eb	Add CONTRIBUTING.md (#288 )	2022-09-30 07:51:30 -04:00
Charlie Marsh	46bdcb9080	Add instructions on GitHub Actions integration	2022-09-29 19:05:02 -04:00
Charlie Marsh	d16a7252af	Add instructions on PyCharm integration	2022-09-29 18:52:45 -04:00
Charlie Marsh	ca6551eb37	Remove misc. unnecessary statements	2022-09-29 18:45:10 -04:00
Charlie Marsh	43a4f5749e	Create CODE_OF_CONDUCT.md (#287 )	2022-09-29 16:59:17 -04:00
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