Move template linting and formatting to ruff

The generated project already uses that, let's be consistent and use it everywhere

.flake8

@@ -1,4 +0,0 @@
-[flake8]
-exclude = docs
-max-line-length = 119
-extend-ignore = E203

.pre-commit-config.yaml

@@ -25,27 +25,12 @@ repos:
       - id: prettier
         args: ["--tab-width", "2"]
 
-  - repo: https://github.com/asottile/pyupgrade
-    rev: v3.19.1
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.8.4
     hooks:
-      - id: pyupgrade
-        args: [--py312-plus]
-        exclude: hooks/
-
-  - repo: https://github.com/psf/black
-    rev: 24.10.0
-    hooks:
-      - id: black
-
-  - repo: https://github.com/PyCQA/isort
-    rev: 5.13.2
-    hooks:
-      - id: isort
-
-  - repo: https://github.com/PyCQA/flake8
-    rev: 7.1.1
-    hooks:
-      - id: flake8
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix]
+      - id: ruff-format
 
   - repo: https://github.com/tox-dev/pyproject-fmt
     rev: "v2.5.0"

pyproject.toml

@@ -58,22 +58,86 @@ docs = [
   "sphinx-rtd-theme>=3",
 ]
 
-[tool.black]
-line-length = 119
-target-version = [
-  'py312',
+[tool.ruff]
+target-version = "py312"
+# Exclude the template content as most files aren't parseable
+extend-exclude = [
+    "{{cookiecutter.project_slug}}/*",
 ]
 
-# ==== isort ====
-
-[tool.isort]
-profile = "black"
-line_length = 119
-known_first_party = [
-  "tests",
-  "scripts",
-  "hooks",
+[tool.ruff.lint]
+select = [
+  "F",
+  "E",
+  "W",
+  "C90",
+  "I",
+  "N",
+  "UP",
+  "YTT",
+  # "ANN", # flake8-annotations: we should support this in the future but 100+ errors atm
+  "ASYNC",
+  "S",
+  "BLE",
+  "FBT",
+  "B",
+  "A",
+  "COM",
+  "C4",
+  "DTZ",
+  "T10",
+  "EM",
+  "EXE",
+  "FA",
+  'ISC',
+  "ICN",
+  "G",
+  'INP',
+  'PIE',
+  "T20",
+  'PYI',
+  'PT',
+  "Q",
+  "RSE",
+  "RET",
+  "SLF",
+  "SLOT",
+  "SIM",
+  "TID",
+  "TCH",
+  "INT",
+  # "ARG", # Unused function argument
+  "PTH",
+  "ERA",
+  "PD",
+  "PGH",
+  "PL",
+  "TRY",
+  "FLY",
+  # "NPY",
+  # "AIR",
+  "PERF",
+  # "FURB",
+  # "LOG",
+  "RUF",
 ]
+ignore = [
+  "S101", # Use of assert detected https://docs.astral.sh/ruff/rules/assert/
+  "RUF012", # Mutable class attributes should be annotated with `typing.ClassVar`
+  "SIM102", # sometimes it's better to nest
+  "UP038", # Checks for uses of isinstance/issubclass that take a tuple
+          # of types for comparison.
+          # Deactivated because it can make the code slow:
+          # https://github.com/astral-sh/ruff/issues/7871
+]
+# The fixes in extend-unsafe-fixes will require
+# provide the `--unsafe-fixes` flag when fixing.
+extend-unsafe-fixes = [
+    "UP038",
+]
+
+[tool.ruff.lint.isort]
+force-single-line = true
 
 # ==== pytest ====
 

tox.ini

@@ -5,7 +5,3 @@ envlist = py312,black-template
 [testenv]
 passenv = AUTOFIXABLE_STYLES
 commands = pytest -n auto {posargs:./tests}
-
-[testenv:black-template]
-deps = black
-commands = black --check hooks tests docs scripts