Enable ruff PLW0602 rule (#57588)

Author: jscheffl

airflow-core/src/airflow/api_fastapi/app.py

@@ -161,8 +161,6 @@ def init_auth_manager(app: FastAPI | None = None) -> BaseAuthManager:
 
 def get_auth_manager() -> BaseAuthManager:
     """Return the auth manager, provided it's been initialized before."""
-    global auth_manager
-
     if auth_manager is None:
         raise RuntimeError(
             "Auth Manager has not been initialized yet. "

airflow-core/src/airflow/configuration.py

@@ -1886,7 +1886,7 @@ def load_test_config(self):
         """
         # We need those globals before we run "get_all_expansion_variables" because this is where
         # the variables are expanded from in the configuration
-        global FERNET_KEY, AIRFLOW_HOME, JWT_SECRET_KEY
+        global FERNET_KEY, JWT_SECRET_KEY
         from cryptography.fernet import Fernet
 
         unit_test_config_file = pathlib.Path(__file__).parent / "config_templates" / "unit_tests.cfg"

airflow-core/src/airflow/logging_config.py

@@ -38,7 +38,6 @@
 
 def __getattr__(name: str):
     if name == "REMOTE_TASK_LOG":
-        global REMOTE_TASK_LOG
         load_logging_config()
         return REMOTE_TASK_LOG
 

airflow-core/src/airflow/plugins_manager.py

@@ -214,8 +214,6 @@ def is_valid_plugin(plugin_obj):
     :return: Whether or not the obj is a valid subclass of
         AirflowPlugin
     """
-    global plugins
-
     if (
         inspect.isclass(plugin_obj)
         and issubclass(plugin_obj, AirflowPlugin)
@@ -234,8 +232,6 @@ def register_plugin(plugin_instance):
 
     :param plugin_instance: subclass of AirflowPlugin
     """
-    global plugins
-
     if plugin_instance.name in loaded_plugins:
         return
 
@@ -250,8 +246,6 @@ def load_entrypoint_plugins():
 
     The entry_point group should be 'airflow.plugins'.
     """
-    global import_errors
-
     log.debug("Loading plugins from entrypoints")
 
     for entry_point, dist in entry_points_with_dist("airflow.plugins"):
@@ -271,7 +265,6 @@ def load_entrypoint_plugins():
 
 def load_plugins_from_plugin_directory():
     """Load and register Airflow Plugins from plugins directory."""
-    global import_errors
     log.debug("Loading plugins from directory: %s", settings.PLUGINS_FOLDER)
     files = find_path_from_directory(settings.PLUGINS_FOLDER, ".airflowignore")
     plugin_search_locations: list[tuple[str, Generator[str, None, None]]] = [("", files)]
@@ -373,7 +366,6 @@ def ensure_plugins_loaded():
 
 def initialize_ui_plugins():
     """Collect extension points for the UI."""
-    global plugins
     global external_views
     global react_apps
 
@@ -456,7 +448,6 @@ def _remove_list_item(lst, item):
 
 def initialize_flask_plugins():
     """Collect flask extension points for WEB UI (legacy)."""
-    global plugins
     global flask_blueprints
     global flask_appbuilder_views
     global flask_appbuilder_menu_links
@@ -496,7 +487,6 @@ def initialize_flask_plugins():
 
 def initialize_fastapi_plugins():
     """Collect extension points for the API."""
-    global plugins
     global fastapi_apps
     global fastapi_root_middlewares
 
@@ -593,7 +583,6 @@ def initialize_hook_lineage_readers_plugins():
 
 def integrate_macros_plugins() -> None:
     """Integrates macro plugins."""
-    global plugins
     global macros_modules
 
     from airflow.sdk.execution_time import macros
@@ -626,8 +615,6 @@ def integrate_macros_plugins() -> None:
 
 def integrate_listener_plugins(listener_manager: ListenerManager) -> None:
     """Add listeners from plugins."""
-    global plugins
-
     ensure_plugins_loaded()
 
     if plugins:

airflow-ctl-tests/tests/airflowctl_tests/conftest.py

@@ -182,7 +182,6 @@ def docker_compose_up(tmp_path_factory):
 
 def docker_compose_down():
     """Tear down Docker Compose environment."""
-    global docker_client
     if docker_client:
         docker_client.compose.down(remove_orphans=True, volumes=True, quiet=True)
 

dev/breeze/src/airflow_breeze/prepare_providers/provider_documentation.py

@@ -836,7 +836,6 @@ def update_release_notes(
                 return with_breaking_changes, maybe_with_new_features, False
             change_table_len = len(list_of_list_of_changes[0])
             table_iter = 0
-            global SHORT_HASH_TO_TYPE_DICT
             type_of_current_package_changes: list[TypeOfChange] = []
             while table_iter < change_table_len:
                 get_console().print()

providers/standard/tests/unit/standard/operators/test_python.py

@@ -955,7 +955,6 @@ def f():
 
     def test_string_args(self):
         def f():
-            global virtualenv_string_args
             print(virtualenv_string_args)
             if virtualenv_string_args[0] != virtualenv_string_args[2]:
                 raise RuntimeError

pyproject.toml

@@ -595,6 +595,9 @@ extend-select = [
     "PLW0128", # Redeclared variable {name} in assignment
     "PLW0129", # Asserting on an empty string literal will never pass
     "PLW0133", # Missing raise statement on exception
+    "PLW0245", # super call is missing parentheses
+    "PLW0406", # Module {name} imports itself
+    "PLW0602", # Using global for {name} but no assignment is done
     # Per rule enables
     "RUF006", # Checks for asyncio dangling task
     "RUF015", # Checks for unnecessary iterable allocation for first element

scripts/ci/prek/check_providers_subpackages_all_have_init.py

@@ -105,7 +105,6 @@ def _determine_init_py_action(need_path_extension: bool, root_path: Path):
 
 
 def check_dir_init_test_folders(folders: list[Path]) -> None:
-    global should_fail
     folders = list(folders)
     for root_distribution_path in folders:
         # We need init folders for all folders and for the common ones we need path extension
@@ -121,7 +120,6 @@ def check_dir_init_test_folders(folders: list[Path]) -> None:
 
 
 def check_dir_init_src_folders(folders: list[Path]) -> None:
-    global should_fail
     folders = list(folders)
     for root_distribution_path in folders:
         # We need init folders for all folders and for the common ones we need path extension