| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| from __future__ import annotations |
| |
| __version__ = "2.10.0.dev0" |
| |
| import os |
| import sys |
| import warnings |
| |
| if os.environ.get("_AIRFLOW_PATCH_GEVENT"): |
| # If you are using gevents and start airflow webserver, you might want to run gevent monkeypatching |
| # as one of the first thing when Airflow is started. This allows gevent to patch networking and other |
| # system libraries to make them gevent-compatible before anything else patches them (for example boto) |
| from gevent.monkey import patch_all |
| |
| patch_all() |
| |
| if sys.platform == "win32": |
| warnings.warn( |
| "Airflow currently can be run on POSIX-compliant Operating Systems. For development, " |
| "it is regularly tested on fairly modern Linux Distros and recent versions of macOS. " |
| "On Windows you can run it via WSL2 (Windows Subsystem for Linux 2) or via Linux Containers. " |
| "The work to add Windows support is tracked via https://github.com/apache/airflow/issues/10388, " |
| "but it is not a high priority.", |
| category=RuntimeWarning, |
| stacklevel=1, |
| ) |
| |
| # The configuration module initializes and validates the conf object as a side effect the first |
| # time it is imported. If it is not imported before importing the settings module, the conf |
| # object will then be initted/validated as a side effect of it being imported in settings, |
| # however this can cause issues since those modules are very tightly coupled and can |
| # very easily cause import cycles in the conf init/validate code (since downstream code from |
| # those functions likely import settings). |
| # configuration is therefore initted early here, simply by importing it. |
| from airflow import configuration, settings |
| |
| __all__ = [ |
| "__version__", |
| "DAG", |
| "Dataset", |
| "XComArg", |
| ] |
| |
| # Make `airflow` a namespace package, supporting installing |
| # airflow.providers.* in different locations (i.e. one in site, and one in user |
| # lib.) |
| __path__ = __import__("pkgutil").extend_path(__path__, __name__) # type: ignore |
| |
| |
| # Perform side-effects unless someone has explicitly opted out before import |
| # WARNING: DO NOT USE THIS UNLESS YOU REALLY KNOW WHAT YOU'RE DOING. |
| # This environment variable prevents proper initialization, and things like |
| # configs, logging, the ORM, etc. will be broken. It is only useful if you only |
| # access certain trivial constants and free functions (e.g. `__version__`). |
| if not os.environ.get("_AIRFLOW__AS_LIBRARY", None): |
| settings.initialize() |
| |
| # Things to lazy import in form {local_name: ('target_module', 'target_name', 'deprecated')} |
| __lazy_imports: dict[str, tuple[str, str, bool]] = { |
| "DAG": (".models.dag", "DAG", False), |
| "Dataset": (".datasets", "Dataset", False), |
| "XComArg": (".models.xcom_arg", "XComArg", False), |
| "version": (".version", "", False), |
| # Deprecated lazy imports |
| "AirflowException": (".exceptions", "AirflowException", True), |
| } |
| |
| |
| def __getattr__(name: str): |
| # PEP-562: Lazy loaded attributes on python modules |
| module_path, attr_name, deprecated = __lazy_imports.get(name, ("", "", False)) |
| if not module_path: |
| if name.startswith("PY3") and (py_minor := name[3:]) in ("6", "7", "8", "9", "10", "11", "12"): |
| warnings.warn( |
| f"Python version constraint {name!r} is deprecated and will be removed in the future. " |
| f"Please get version info from the 'sys.version_info'.", |
| DeprecationWarning, |
| stacklevel=2, |
| ) |
| return sys.version_info >= (3, int(py_minor)) |
| |
| raise AttributeError(f"module {__name__!r} has no attribute {name!r}") |
| elif deprecated: |
| warnings.warn( |
| f"Import {name!r} directly from the airflow module is deprecated and " |
| f"will be removed in the future. Please import it from 'airflow{module_path}.{attr_name}'.", |
| DeprecationWarning, |
| stacklevel=2, |
| ) |
| |
| import importlib |
| |
| mod = importlib.import_module(module_path, __name__) |
| if attr_name: |
| val = getattr(mod, attr_name) |
| else: |
| val = mod |
| |
| # Store for next time |
| globals()[name] = val |
| return val |
| |
| |
| if not settings.LAZY_LOAD_PROVIDERS: |
| from airflow import providers_manager |
| |
| manager = providers_manager.ProvidersManager() |
| manager.initialize_providers_list() |
| manager.initialize_providers_hooks() |
| manager.initialize_providers_extra_links() |
| if not settings.LAZY_LOAD_PLUGINS: |
| from airflow import plugins_manager |
| |
| plugins_manager.ensure_plugins_loaded() |
| |
| |
| # This is never executed, but tricks static analyzers (PyDev, PyCharm,) |
| # into knowing the types of these symbols, and what |
| # they contain. |
| STATICA_HACK = True |
| globals()["kcah_acitats"[::-1].upper()] = False |
| if STATICA_HACK: # pragma: no cover |
| from airflow.models.dag import DAG |
| from airflow.models.dataset import Dataset |
| from airflow.models.xcom_arg import XComArg |