Switch to ruff for flake8 / isort code checking (wagtail#10324)

.circleci/config.yml

@@ -19,8 +19,7 @@ jobs:
           key: pipenv-v1-{{ checksum "setup.py" }}
           paths:
             - .venv
-      - run: pipenv run flake8
-      - run: pipenv run isort --check-only --diff .
+      - run: pipenv run ruff check .
       - run: pipenv run black --target-version py37 --check --diff .
       - run: pipenv run semgrep --config .semgrep.yml --error .
       - run: git ls-files '*.html' | xargs pipenv run djhtml --check

.pre-commit-config.yaml

@@ -8,19 +8,14 @@ repos:
       - id: black
         language_version: python3
         args: ['--target-version', 'py37']
-  - repo: https://github.com/timothycrosley/isort
-    # isort config is in setup.cfg
-    rev: 5.6.4
-    hooks:
-      - id: isort
-  - repo: https://github.com/pycqa/flake8
-    # flake8 config is in setup.cfg
-    rev: 3.8.4
-    hooks:
-      - id: flake8
-        additional_dependencies:
-          - flake8-comprehensions
-          - flake8-assertive
+
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    # Ruff version.
+    rev: 'v0.0.261'
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix]
+
   - repo: https://github.com/pre-commit/mirrors-prettier
     rev: v2.5.1
     hooks:

Makefile

@@ -3,8 +3,8 @@
 help:
 	@echo "clean-pyc - remove Python file artifacts"
 	@echo "develop - install development dependencies"
-	@echo "lint - check style with black, flake8, sort python with isort, indent html, and lint frontend css/js"
-	@echo "format - enforce a consistent code style across the codebase, sort python files with isort and fix frontend css/js"
+	@echo "lint - check style with black, ruff, sort python with ruff, indent html, and lint frontend css/js"
+	@echo "format - enforce a consistent code style across the codebase, sort python files with ruff and fix frontend css/js"
 	@echo "test - run tests"
 	@echo "coverage - check code coverage"
 
@@ -19,8 +19,7 @@ develop: clean-pyc
 
 lint-server:
 	black --target-version py37 --check --diff .
-	flake8
-	isort --check-only --diff .
+	ruff check .
 	semgrep --config .semgrep.yml --error .
 	curlylint --parse-only wagtail
 	git ls-files '*.html' | xargs djhtml --check
@@ -37,7 +36,7 @@ lint: lint-server lint-client lint-docs
 
 format-server:
 	black --target-version py37 .
-	isort .
+	ruff check . --fix
 	git ls-files '*.html' | xargs djhtml -i
 
 format-client:

docs/contributing/python_guidelines.md

@@ -10,7 +10,7 @@ run by `pre-commit` if that is configured.
     a text editor with [EditorConfig](https://editorconfig.org/) support to avoid indentation and
     whitespace issues. Python and HTML files use 4 spaces for indentation.
 
-In addition, import lines should be sorted according to [isort](https://pycqa.github.io/isort/) 5.6.4 rules.
+In addition, import lines should be sorted according to [isort](https://pycqa.github.io/isort/) rules.
 If you have installed Wagtail's testing dependencies (`pip install -e '.[testing]'`), you can check your code by
 running `make lint`. You can also just check python related linting by running `make lint-server`.
 

ruff.toml

@@ -0,0 +1,10 @@
+# D100: Missing docstring in public module
+# D101: Missing docstring in public class
+# D102: Missing docstring in public method
+# D103: Missing docstring in public function
+# D105: Missing docstring in magic method
+# N806: Variable in function should be lowercase
+# E501: Line too long
+ignore = ["D100","D101","D102","D103","D105","N806","E501"]
+exclude = ["wagtail/project_template/*","node_modules","venv",".venv"]
+line-length = 88

setup.cfg

@@ -1,31 +1,10 @@
 [bdist_wheel]
 python-tag = py3
 
-[flake8]
-# D100: Missing docstring in public module
-# D101: Missing docstring in public class
-# D102: Missing docstring in public method
-# D103: Missing docstring in public function
-# D105: Missing docstring in magic method
-# W503: line break before binary operator (superseded by W504 line break after binary operator)
-# N806: Variable in function should be lowercase
-# E203: Whitespace before ':'
-# E501: Line too long
-ignore = D100,D101,D102,D103,D105,W503,N806,E203,E501
-exclude = wagtail/project_template/*,node_modules,venv,.venv
-max-line-length = 88
-
 [doc8]
 ignore = D001
 ignore-path = _build,docs/_build
 
-[isort]
-profile = black
-skip=migrations,project_template,node_modules,.git,__pycache__,LC_MESSAGES,venv,.venv,.tox
-blocked_extensions=rst,html,js,svg,txt,css,scss,png,snap,ts,tsx
-known_first_party=wagtail
-default_section=THIRDPARTY
-
 [tool:pytest]
 django_find_project = false
 python_files=test_*.py

setup.py

@@ -53,13 +53,8 @@
     # For coverage and PEP8 linting
     "coverage>=3.7.0",
     "black==22.3.0",
-    "flake8>=3.6.0",
-    "isort==5.6.4",  # leave this pinned - it tends to change rules between patch releases
-    "flake8-blind-except==0.1.1",
-    "flake8-comprehensions==3.8.0",
-    "flake8-print==5.0.0",
     "doc8==0.8.1",
-    "flake8-assertive==2.0.0",
+    "ruff==0.0.261",
     # For enforcing string formatting mechanism in source files
     "semgrep==1.3.0",
     # For templates linting

tox.ini

@@ -58,7 +58,3 @@ setenv =
     mssql: DATABASE_USER=sa
     mssql: DATABASE_PASSWORD=Password12!
 
-[testenv:flake8]
-basepython=python3.7
-deps=flake8>=3.6.0
-commands=flake8