Move away from legacy importlib.resources API

importlib.resources deprecated the top-level read_binary() and similar
functions in favor of the new files() API. This is only available in
Python 3.9 and later, so the importlib-resources backport has been
bumped to be also installed on 3.7 and 3.8.

Author: uranusjr

airflow/providers_manager.py

@@ -37,20 +37,12 @@
 from airflow.utils.log.logging_mixin import LoggingMixin
 from airflow.utils.module_loading import import_string
 
-try:
-    import importlib.resources as importlib_resources
-except ImportError:
-    # Try back-ported to PY<37 `importlib_resources`.
-    import importlib_resources
-
 log = logging.getLogger(__name__)
 
 if sys.version_info >= (3, 9):
-    from functools import cache
+    from importlib.resources import files as resource_files
 else:
-    from functools import lru_cache
-
-    cache = lru_cache(maxsize=None)
+    from importlib_resources import files as resource_files
 
 MIN_PROVIDER_VERSIONS = {
     "apache-airflow-providers-celery": "2.1.0",
@@ -102,17 +94,17 @@ def __contains__(self, key):
 
 def _create_provider_info_schema_validator():
     """Creates JSON schema validator from the provider_info.schema.json"""
-    schema = json.loads(importlib_resources.read_text('airflow', 'provider_info.schema.json'))
+    with resource_files("airflow").joinpath("provider_info.schema.json").open("rb") as f:
+        schema = json.load(f)
     cls = jsonschema.validators.validator_for(schema)
     validator = cls(schema)
     return validator
 
 
 def _create_customized_form_field_behaviours_schema_validator():
     """Creates JSON schema validator from the customized_form_field_behaviours.schema.json"""
-    schema = json.loads(
-        importlib_resources.read_text('airflow', 'customized_form_field_behaviours.schema.json')
-    )
+    with resource_files("airflow").joinpath("customized_form_field_behaviours.schema.json").open("rb") as f:
+        schema = json.load(f)
     cls = jsonschema.validators.validator_for(schema)
     validator = cls(schema)
     return validator

setup.cfg

@@ -111,7 +111,7 @@ install_requires =
     gunicorn>=20.1.0
     httpx
     importlib_metadata>=1.7;python_version<"3.9"
-    importlib_resources~=5.2;python_version<"3.7"
+    importlib_resources~=5.2;python_version<"3.9"
     # Required by vendored-in connexion
     inflection>=0.3.1
     iso8601>=0.1.12