Migrate to ruff completely

Author: ulgens

.pre-commit-config.yaml

@@ -31,11 +31,6 @@ repos:
           - id: django-upgrade
             args: [--target-version, "6.1"]
 
-    - repo: https://github.com/psf/black-pre-commit-mirror
-      rev: 26.5.1
-      hooks:
-          - id: black
-
     - repo: https://github.com/rbubley/mirrors-prettier
       rev: v3.7.4
       hooks:
@@ -45,11 +40,6 @@ repos:
             exclude_types: [html, json, scss]
             exclude: '(^djangoproject\/static\/js\/lib\/.*$|^checklists\/templates\/.*$)'
 
-    - repo: https://github.com/pycqa/flake8
-      rev: 7.3.0
-      hooks:
-          - id: flake8
-
     - repo: https://github.com/astral-sh/ruff-pre-commit
       rev: v0.16.3
       hooks:

ruff.toml

@@ -1,5 +1,5 @@
 [lint]
-select = [
+extend-select = [
     # For flake8 compatibility.
     # Explicit definition of the rule can be removed after the full migration.
     # https://docs.astral.sh/ruff/rules/lambda-assignment/
@@ -11,3 +11,8 @@ select = [
     # https://github.com/asottile/pyupgrade
     "UP",
 ]
+[lint.per-file-ignores]
+# RUF012 is violated by Django-generated migrations.
+# https://docs.astral.sh/ruff/rules/mutable-class-default/
+# TODO: Fix existing issues, update the migration template and remove this exception
+"**/migrations/*" = ["RUF012"]