Add ruff rules A,B,C4,ISC,PGH,RET,RUF,S,SIM,SLF

pyproject.toml

@@ -81,7 +81,6 @@ select = [
   "DJ",     # flake8-django
   "DTZ",    # flake8-datetimez
   "E",      # pycodestyle errors
-  "EM",     # flake8-errmsg
   "F",      # Pyflakes
   "FIX",    # flake8-fixme
   "FLY",    # flynt
@@ -92,7 +91,6 @@ select = [
   "ISC",    # flake8-implicit-str-concat
   "NPY",    # NumPy-specific rules
   "PD",     # pandas-vet
-  "PERF",   # Perflint
   "PGH",    # pygrep-hooks
   "PIE",    # flake8-pie
   "PL",     # Pylint
@@ -116,12 +114,14 @@ select = [
   # "COM",  # flake8-commas
   # "CPY",  # flake8-copyright
   # "D",    # pydocstyle
+  # "EM",   # flake8-errmsg
   # "ERA",  # eradicate
   # "EXE",  # flake8-executable
   # "FA",   # flake8-future-annotations
   # "FBT",  # flake8-boolean-trap
   # "I",    # isort
   # "N",    # pep8-naming
+  # "PERF", # Perflint
   # "PT",   # flake8-pytest-style
   # "PTH",  # flake8-use-pathlib
   # "Q",    # flake8-quotes

waffle/__init__.py

@@ -63,8 +63,8 @@ def get_waffle_model(setting_name: str) -> (
     try:
         return django_apps.get_model(flag_model_name)
     except ValueError as ve:
-        msg = f"WAFFLE_{setting_name} must be of the form 'app_label.model_name'"
-        raise ImproperlyConfigured(msg) from ve
+        raise ImproperlyConfigured(f"WAFFLE_{setting_name} must be of the form 'app_label.model_name'") from ve
     except LookupError as le:
-        msg = f"WAFFLE_{setting_name} refers to model '{flag_model_name}' that has not been installed"
-        raise ImproperlyConfigured(msg) from le
+        raise ImproperlyConfigured(
+            f"WAFFLE_{setting_name} refers to model '{flag_model_name}' that has not been installed"
+        ) from le

waffle/admin.py

@@ -84,7 +84,7 @@ def label_and_url_for_value(self, values: Any) -> tuple[str, str]:
                     .using(self.db) \
                     .get(**{key: value})
                 names.append(escape(str(name)))
-            except self.rel.model.DoesNotExist:  # noqa: PERF203
+            except self.rel.model.DoesNotExist:
                 names.append('<missing>')
         return "(" + ", ".join(names) + ")", ""
 

waffle/management/commands/waffle_flag.py

@@ -111,8 +111,7 @@ def handle(self, *args: Any, **options: Any) -> None:
         flag_name = options['name']
 
         if not flag_name:
-            msg = 'You need to specify a flag name.'
-            raise CommandError(msg)
+            raise CommandError('You need to specify a flag name.')
 
         if options['create']:
             flag, created = get_waffle_flag_model().objects.get_or_create(name=flag_name)
@@ -122,8 +121,7 @@ def handle(self, *args: Any, **options: Any) -> None:
             try:
                 flag = get_waffle_flag_model().objects.get(name=flag_name)
             except get_waffle_flag_model().DoesNotExist as dne:
-                msg = 'This flag does not exist.'
-                raise CommandError(msg) from dne
+                raise CommandError('This flag does not exist.') from dne
 
         # Group isn't an attribute on the Flag, but a related Many-to-Many
         # field, so we handle it a bit differently by looking up groups and
@@ -135,9 +133,8 @@ def handle(self, *args: Any, **options: Any) -> None:
                 try:
                     group_instance = Group.objects.get(name=group)
                     group_hash[group_instance.name] = group_instance.id
-                except Group.DoesNotExist as dne:  # noqa: PERF203
-                    msg = f'Group {group} does not exist'
-                    raise CommandError(msg) from dne
+                except Group.DoesNotExist as dne:
+                    raise CommandError(f'Group {group} does not exist') from dne
             # If 'append' was not passed, we clear related groups
             if not options_append:
                 flag.groups.clear()
@@ -155,9 +152,8 @@ def handle(self, *args: Any, **options: Any) -> None:
                         | Q(**{UserModel.EMAIL_FIELD: username})
                     )
                     user_hash.add(user_instance)
-                except UserModel.DoesNotExist as dne:  # noqa: PERF203
-                    msg = f'User {username} does not exist'
-                    raise CommandError(msg) from dne
+                except UserModel.DoesNotExist as dne:
+                    raise CommandError(f'User {username} does not exist') from dne
             # If 'append' was not passed, we clear related users
             if not options_append:
                 flag.users.clear()

waffle/management/commands/waffle_sample.py

@@ -41,16 +41,16 @@ def handle(self, *args: Any, **options: Any) -> None:
         percent = options['percent']
 
         if not (sample_name and percent):
-            msg = 'You need to specify a sample name and percentage.'
-            raise CommandError(msg)
+            raise CommandError(
+                'You need to specify a sample name and percentage.'
+            )
 
         try:
             percent = float(percent)
             if not (0.0 <= percent <= 100.0):
                 raise ValueError
-        except ValueError as ve:
-            msg = 'You need to enter a valid percentage value.'
-            raise CommandError(msg) from ve
+        except ValueError as e:
+            raise CommandError('You need to enter a valid percentage value.') from e
 
         if options['create']:
             sample, created = get_waffle_sample_model().objects.get_or_create(
@@ -61,8 +61,7 @@ def handle(self, *args: Any, **options: Any) -> None:
             try:
                 sample = get_waffle_sample_model().objects.get(name=sample_name)
             except get_waffle_sample_model().DoesNotExist as dne:
-                msg = 'This sample does not exist.'
-                raise CommandError(msg) from dne
+                raise CommandError('This sample does not exist.') from dne
 
         sample.percent = percent
         sample.save()

waffle/management/commands/waffle_switch.py

@@ -7,9 +7,9 @@
 
 
 def on_off_bool(string: str) -> bool:
-    if string not in {'on', 'off'}:
-        msg = f"invalid choice: {string!r} (choose from 'on', 'off')"
-        raise ArgumentTypeError(msg)
+    if string not in ['on', 'off']:
+        raise ArgumentTypeError(f"invalid choice: {string!r} (choose from 'on', "
+                                "'off')")
     return string == 'on'
 
 
@@ -53,8 +53,7 @@ def handle(self, *args: Any, **options: Any) -> None:
         state = options['state']
 
         if not (switch_name and state is not None):
-            msg = 'You need to specify a switch name and state.'
-            raise CommandError(msg)
+            raise CommandError('You need to specify a switch name and state.')
 
         if options["create"]:
             switch, created = get_waffle_switch_model().objects.get_or_create(
@@ -66,8 +65,7 @@ def handle(self, *args: Any, **options: Any) -> None:
             try:
                 switch = get_waffle_switch_model().objects.get(name=switch_name)
             except get_waffle_switch_model().DoesNotExist as dne:
-                msg = 'This switch does not exist.'
-                raise CommandError(msg) from dne
+                raise CommandError('This switch does not exist.') from dne
 
         switch.active = state
         switch.save()

waffle/mixins.py

@@ -15,8 +15,7 @@ def validate_waffle(self, waffle, func):
         return func(waffle)
 
     def invalid_waffle(self):
-        msg = 'Inactive waffle'
-        raise Http404(msg)
+        raise Http404('Inactive waffle')
 
 
 class WaffleFlagMixin(BaseWaffleMixin):

waffle/templatetags/waffle_tags.py

@@ -41,8 +41,7 @@ def render(self, context):
     def handle_token(cls, parser, token, kind, condition):
         bits = token.split_contents()
         if len(bits) < 2:
-            msg = f"{bits[0]!r} tag requires an argument"
-            raise template.TemplateSyntaxError(msg)
+            raise template.TemplateSyntaxError(f"{bits[0]!r} tag requires an argument")
 
         name = bits[1]
         compiled_name = parser.compile_filter(name)

waffle/tests/test_testutils.py

@@ -66,8 +66,7 @@ def test_restores_after_exception(self):
 
         def inner():
             with override_switch('foo', active=False):
-                msg = "Trying to break"
-                raise RuntimeError(msg)
+                raise RuntimeError("Trying to break")
 
         with self.assertRaises(RuntimeError):
             inner()
@@ -79,8 +78,7 @@ def test_restores_after_exception_in_decorator(self):
 
         @override_switch('foo', active=False)
         def inner():
-            msg = "Trying to break"
-            raise RuntimeError(msg)
+            raise RuntimeError("Trying to break")
 
         with self.assertRaises(RuntimeError):
             inner()