Switch to "ruff" linter, enable many of its rules

.github/workflows/ci.yml

@@ -62,13 +62,17 @@ jobs:
       - name: Install dependencies
         run: |
           hatch run style:pip freeze
+          hatch run types:pip freeze
+      - name: Check style
+        if: always()
+        run: |
+          hatch run style:fix
       - name: Check formatting
+        if: always()
         run: |
           hatch run style:format
-          git diff --exit-code
-      - name: Install dependencies
-        run: |
-          hatch run types:pip freeze
+          git diff --color --exit-code
       - name: Check types
+        if: always()
         run: |
           hatch run types:check

mkdocs_section_index/plugin.py

@@ -2,14 +2,17 @@
 
 import collections
 import logging
+from typing import TYPE_CHECKING
 
-from jinja2 import Environment
 from mkdocs.plugins import BasePlugin
 from mkdocs.structure.nav import Navigation, Section
 from mkdocs.structure.pages import Page
 
 from . import SectionPage, rewrites
 
+if TYPE_CHECKING:
+    from jinja2 import Environment
+
 __all__ = ["SectionIndexPlugin"]
 
 log = logging.getLogger(f"mkdocs.plugins.{__name__}")

pyproject.toml

@@ -52,7 +52,7 @@ include = ["/mkdocs_section_index", "/tests"]
 
 [tool.hatch.envs.default.scripts]
 all = [
-    "hatch run style:format",
+    "hatch run style:fix",
     "hatch run types:check",
     "hatch run test:test",
 ]
@@ -85,15 +85,16 @@ check = [
 [tool.hatch.envs.style]
 skip-install = true
 dependencies = [
-    "pyupgrade",
-    "autoflake",
+    "ruff",
     "isort",
     "black",
 ]
 [tool.hatch.envs.style.scripts]
+fix = [
+    "ruff check --fix mkdocs_section_index tests",
+    "format",
+]
 format = [
-    "find mkdocs_section_index tests -name '*.py' | xargs pyupgrade --exit-zero-even-if-changed --py37-plus",
-    "autoflake -r mkdocs_section_index tests",
     "isort -q mkdocs_section_index tests",
     "black -q mkdocs_section_index tests",
 ]
@@ -112,11 +113,20 @@ line-length = 100
 profile = "black"
 line_length = 100
 
-[tool.autoflake]
-in-place = true
-remove-all-unused-imports = true
-remove-unused-variables = true
-expand-star-imports = true
+[tool.ruff]
+select = [
+    "F", "W", "E", "UP", "YTT", "C4", "FA", "PIE", "T20", "RSE", "TCH", "DTZ",
+    "B002", "B003", "B005", "B007", "B009", "B012", "B013", "B014", "B015", "B018", "B020", "B021", "B023", "B026", "B033", "B034", "B905",
+    "COM818",
+    "PERF101",
+    "PGH002", "PGH004", "PGH005",
+    "PLE", "PLW0120", "PLW0127",
+    "RUF001", "RUF007", "RUF010", "RUF100", "RUF200",
+    "SIM101", "SIM107", "SIM201", "SIM202", "SIM208", "SIM210", "SIM211", "SIM300", "SIM401", "SIM910",
+]
+ignore = ["E501", "E731"]
+[tool.ruff.flake8-comprehensions]
+allow-dict-calls-with-keyword-arguments = true
 
 [tool.mypy]
 ignore_missing_imports = true

tests/conftest.py

@@ -1,7 +1,6 @@
 import functools
 import http.server
 import logging
-import sys
 import threading
 
 import pytest
@@ -20,8 +19,6 @@ def cap_log():
 
 @pytest.fixture(scope="session")
 def http_server(tmp_path_factory):
-    if sys.version_info < (3, 7):
-        pytest.skip("limitation of http.server", allow_module_level=True)
     directory = tmp_path_factory.mktemp("http_server")
     httpd = http.server.HTTPServer(
         ("localhost", 0),

tests/test_plugin.py

@@ -80,7 +80,7 @@ def test_nav_repr(golden, tmpdir):
 
 @contextlib.contextmanager
 def template_test(directory):
-    config = dict()
+    config = {}
     files = FakeFiles(config)
     env = Environment(loader=FileSystemLoader(directory))
     env.filters["url"] = lambda s: s