Use ruff instead of flake8 and black (#96)

* Use `ruff` instead of flake8 and black

* Ignore ruff cache

* Enable Pytest lint

* Enable eradicable code lint

* Enable Ruff lint

.gitignore

@@ -10,5 +10,6 @@ build
 dist
 *.pyc
 .pytest_cache/
+.ruff_cache/
 # dump.rdb is created by redis-server, needed to run tests
 dump.rdb

MANIFEST.in

@@ -1,6 +1,6 @@
 recursive-include docs *
 recursive-include tests *
-include pytest.ini AUTHORS.rst CODE_OF_CONDUCT.md pyproject.toml LICENSE README.rst tox.ini .coveragerc .isort.cfg .readthedocs.yaml
+include pytest.ini AUTHORS.rst CODE_OF_CONDUCT.md pyproject.toml LICENSE README.rst tox.ini .coveragerc .readthedocs.yaml
 prune docs/_build
 global-exclude *.pyc
 prune __pycache__

pyproject.toml

@@ -1,17 +1,27 @@
-[tool.black]
-line-length = 88 
-target-version = ['py37', 'py38', 'py39', 'py310', 'py311']
-include = '\.pyi?$'
-exclude = '''
-/(
-    \.eggs
-  | \.git
-  | \.hg
-  | \.mypy_cache
-  | \.tox
-  | \.venv
-  | _build
-  | build
-  | dist
-)/
-'''
+[tool.ruff]
+extend-exclude = [
+    "__pycache__",
+]
+
+[tool.ruff.lint]
+select = [
+    # pycodestyle
+    "E", "W",
+    # flake8
+    "F",
+    # isort
+    "I",
+    # pytest style
+    "PT",
+    # eradicate commented code
+    "ERA",
+    # ruff lint
+    "RUF",
+]
+ignore = [
+    # `format` will wrap lines.
+    "E501",
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["dockerflow"]

src/dockerflow/django/middleware.py

@@ -1,6 +1,7 @@
 import logging
 import re
 import time
+import typing
 import urllib
 import uuid
 
@@ -16,7 +17,7 @@ class DockerflowMiddleware(MiddlewareMixin):
     https://github.com/mozilla-services/Dockerflow/blob/main/docs/mozlog.md
     """
 
-    viewpatterns = [
+    viewpatterns: typing.ClassVar = [
         (re.compile(r"/__version__/?$"), views.version),
         (re.compile(r"/__heartbeat__/?$"), views.heartbeat),
         (re.compile(r"/__lbheartbeat__/?$"), views.lbheartbeat),

src/dockerflow/logging.py

@@ -8,6 +8,7 @@
 import socket
 import sys
 import traceback
+import typing
 
 
 class SafeJSONEncoder(json.JSONEncoder):
@@ -32,7 +33,7 @@ class JsonLogFormatter(logging.Formatter):
     LOGGING_FORMAT_VERSION = "2.0"
 
     # Map from Python logging to Syslog severity levels
-    SYSLOG_LEVEL_MAP = {
+    SYSLOG_LEVEL_MAP: typing.ClassVar = {
         50: 2,  # CRITICAL
         40: 3,  # ERROR
         30: 4,  # WARNING
@@ -43,7 +44,7 @@ class JsonLogFormatter(logging.Formatter):
     # Syslog level to use when/if python level isn't found in map
     DEFAULT_SYSLOG_LEVEL = 7
 
-    EXCLUDED_LOGRECORD_ATTRS = set(
+    EXCLUDED_LOGRECORD_ATTRS: typing.ClassVar = set(
         (
             "args",
             "asctime",

tests/conftest.py

@@ -6,7 +6,7 @@
 import dockerflow.checks.registry
 
 
-@pytest.fixture
+@pytest.fixture()
 def version_content():
     """
     as documented on https://github.com/mozilla-services/Dockerflow/blob/main/docs/version_object.md
@@ -20,6 +20,6 @@ def version_content():
 
 
 @pytest.fixture(autouse=True)
-def clear_checks():
+def _clear_checks():
     yield
     dockerflow.checks.registry.clear_checks()

tests/core/test_logging.py

@@ -15,7 +15,7 @@
 
 
 @pytest.fixture()
-def reset_logging():
+def _reset_logging():
     logging.shutdown()
     reload(logging)
 
@@ -31,7 +31,8 @@ def assert_records(records):
     return details
 
 
-def test_initialization_from_ini(reset_logging, caplog, tmpdir):
+@pytest.mark.usefixtures("_reset_logging")
+def test_initialization_from_ini(caplog, tmpdir):
     ini_content = textwrap.dedent(
         """
     [loggers]
@@ -229,7 +230,5 @@ def test_ignore_json_message(caplog):
         }
     }
 }
-""".replace(
-        "\\", "\\\\"
-    )
+""".replace("\\", "\\\\")
 )  # HACK: Fix escaping for easy copy/paste

tests/django/test_django.py

@@ -20,19 +20,19 @@
 
 
 @pytest.fixture(autouse=True)
-def reset_checks():
+def _reset_checks():
     yield
     registry.registered_checks = set()
     registry.deployment_checks = set()
 
 
 @pytest.fixture(autouse=True)
-def setup_request_summary_logger(dockerflow_middleware):
+def _setup_request_summary_logger(dockerflow_middleware):
     dockerflow_middleware.summary_logger.addHandler(logging.NullHandler())
     dockerflow_middleware.summary_logger.setLevel(logging.INFO)
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow_middleware():
     return DockerflowMiddleware(get_response=HttpResponse())
 
@@ -55,7 +55,7 @@ def test_version_missing(dockerflow_middleware, mocker, rf):
     assert response.status_code == 404
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_heartbeat(client, settings):
     response = client.get("/__heartbeat__")
     assert response.status_code == 200
@@ -73,7 +73,7 @@ def test_heartbeat(client, settings):
     assert content.get("details") is None
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_heartbeat_debug(client, settings):
     settings.DOCKERFLOW_CHECKS = [
         "tests.django.django_checks.warning",
@@ -89,7 +89,7 @@ def test_heartbeat_debug(client, settings):
     assert content["details"]
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_heartbeat_silenced(client, settings):
     settings.DOCKERFLOW_CHECKS = [
         "tests.django.django_checks.warning",
@@ -107,8 +107,9 @@ def test_heartbeat_silenced(client, settings):
     assert "error" not in content["details"]
 
 
-@pytest.mark.django_db
-def test_heartbeat_logging(dockerflow_middleware, reset_checks, rf, settings, caplog):
+@pytest.mark.django_db()
+@pytest.mark.usefixtures("_reset_checks")
+def test_heartbeat_logging(dockerflow_middleware, rf, settings, caplog):
     request = rf.get("/__heartbeat__")
     settings.DOCKERFLOW_CHECKS = [
         "tests.django.django_checks.warning",
@@ -123,7 +124,7 @@ def test_heartbeat_logging(dockerflow_middleware, reset_checks, rf, settings, ca
     assert ("WARNING", "tests.checks.W001: some warning") in logged
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_lbheartbeat_makes_no_db_queries(dockerflow_middleware, rf):
     queries = CaptureQueriesContext(connection)
     request = rf.get("/__lbheartbeat__")
@@ -133,7 +134,7 @@ def test_lbheartbeat_makes_no_db_queries(dockerflow_middleware, rf):
     assert len(queries) == 0
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_redis_check(client, settings):
     settings.DOCKERFLOW_CHECKS = ["dockerflow.django.checks.check_redis_connected"]
     checks.register()
@@ -152,7 +153,7 @@ def assert_log_record(request, record, errno=0, level=logging.INFO):
     assert isinstance(record.t, int)
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow_request(rf):
     return rf.get("/", HTTP_USER_AGENT="dockerflow/tests", HTTP_ACCEPT_LANGUAGE="tlh")
 
@@ -248,15 +249,15 @@ def test_check_database_connected_misconfigured(mocker):
     assert errors[0].id == health.ERROR_MISCONFIGURED_DATABASE
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_check_database_connected_unsuable(mocker):
     mocker.patch("django.db.connection.is_usable", return_value=False)
     errors = checks.check_database_connected([])
     assert len(errors) == 1
     assert errors[0].id == health.ERROR_UNUSABLE_DATABASE
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_check_database_connected_success(mocker):
     errors = checks.check_database_connected([])
     assert errors == []
@@ -272,7 +273,7 @@ def test_check_migrations_applied_cannot_check_migrations(exception, mocker):
     assert errors[0].id == health.INFO_CANT_CHECK_MIGRATIONS
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_check_migrations_applied_unapplied_migrations(mocker):
     mock_loader = mocker.patch("django.db.migrations.loader.MigrationLoader")
     mock_loader.return_value.applied_migrations = ["spam", "eggs"]
@@ -306,7 +307,7 @@ def test_check_migrations_applied_unapplied_migrations(mocker):
 
 
 @pytest.mark.parametrize(
-    "exception,error",
+    ("exception", "error"),
     [
         (redis.ConnectionError, health.ERROR_CANNOT_CONNECT_REDIS),
         (NotImplementedError, health.ERROR_MISSING_REDIS_CLIENT),

tests/fastapi/test_fastapi.py

@@ -25,12 +25,12 @@ def create_app():
     return app
 
 
-@pytest.fixture
+@pytest.fixture()
 def app():
     return create_app()
 
 
-@pytest.fixture
+@pytest.fixture()
 def client(app):
     return TestClient(app)
 
@@ -120,7 +120,7 @@ def test_mozlog_failure(client, mocker, caplog):
         "dockerflow.fastapi.views.get_version", side_effect=ValueError("crash")
     )
 
-    with pytest.raises(ValueError):
+    with pytest.raises(expected_exception=ValueError):
         client.get("/__version__")
 
     record = caplog.records[0]

tests/flask/migrations/env.py

@@ -4,7 +4,7 @@
 from logging.config import fileConfig
 
 from alembic import context  # no:qa
-from flask import current_app  # noqa
+from flask import current_app
 from sqlalchemy import engine_from_config, pool
 
 # this is the Alembic Config object, which provides
@@ -24,7 +24,7 @@
 
 # other values from the config, defined by the needs of env.py,
 # can be acquired:
-# my_important_option = config.get_main_option("my_important_option")
+# my_important_option = config.get_main_option("my_important_option")  # noqa
 # ... etc.