fix: remove support for google-api-core<1.26.0

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/base.py.j2

@@ -46,8 +46,6 @@ except AttributeError:
     except pkg_resources.DistributionNotFound:  # pragma: NO COVER
         _GOOGLE_AUTH_VERSION = None
 
-_API_CORE_VERSION = google.api_core.__version__
-
 
 class {{ service.name }}Transport(abc.ABC):
     """Abstract transport class for {{ service.name }}."""
@@ -121,10 +119,9 @@ class {{ service.name }}Transport(abc.ABC):
         self._credentials = credentials
 
 
-    # TODO(busunkim): These two class methods are in the base transport
+    # TODO(busunkim): This method is in the base transport
     # to avoid duplicating code across the transport classes. These functions
-    # should be deleted once the minimum required versions of google-api-core
-    # and google-auth are increased.
+    # should be deleted once the minimum required versions of google-auth is increased.
 
     # TODO: Remove this function once google-auth >= 1.25.0 is required
     @classmethod
@@ -143,25 +140,6 @@ class {{ service.name }}Transport(abc.ABC):
 
         return scopes_kwargs
 
-    # TODO: Remove this function once google-api-core >= 1.26.0 is required
-    @classmethod
-    def _get_self_signed_jwt_kwargs(cls, host: str, scopes: Optional[Sequence[str]]) -> Dict[str, Union[Optional[Sequence[str]], str]]:
-        """Returns kwargs to pass to grpc_helpers.create_channel depending on the google-api-core version"""
-
-        self_signed_jwt_kwargs: Dict[str, Union[Optional[Sequence[str]], str]] = {}
-
-        if _API_CORE_VERSION and (
-            packaging.version.parse(_API_CORE_VERSION)
-            >= packaging.version.parse("1.26.0")
-        ):
-            self_signed_jwt_kwargs["default_scopes"] = cls.AUTH_SCOPES
-            self_signed_jwt_kwargs["scopes"] = scopes
-            self_signed_jwt_kwargs["default_host"] = cls.DEFAULT_HOST
-        else:
-            self_signed_jwt_kwargs["scopes"] = scopes or cls.AUTH_SCOPES
-
-        return self_signed_jwt_kwargs
-
 
     def _prep_wrapped_messages(self, client_info):
         # Precompute the wrapped methods.

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/grpc.py.j2

@@ -204,14 +204,14 @@ class {{ service.name }}GrpcTransport({{ service.name }}Transport):
               and ``credentials_file`` are passed.
         """
 
-        self_signed_jwt_kwargs = cls._get_self_signed_jwt_kwargs(host, scopes)
-
         return grpc_helpers.create_channel(
             host,
             credentials=credentials,
             credentials_file=credentials_file,
             quota_project_id=quota_project_id,
-            **self_signed_jwt_kwargs,
+            default_scopes=cls.AUTH_SCOPES,
+            scopes=scopes,
+            default_host=cls.DEFAULT_HOST,
             **kwargs
         )
 

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/grpc_asyncio.py.j2

@@ -77,14 +77,14 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
             aio.Channel: A gRPC AsyncIO channel object.
         """
 
-        self_signed_jwt_kwargs = cls._get_self_signed_jwt_kwargs(host, scopes)
-
         return grpc_helpers_async.create_channel(
             host,
             credentials=credentials,
             credentials_file=credentials_file,
             quota_project_id=quota_project_id,
-            **self_signed_jwt_kwargs,
+            default_scopes=cls.AUTH_SCOPES,
+            scopes=scopes,
+            default_host=cls.DEFAULT_HOST,
             **kwargs
         )
 

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/rest.py.j2

@@ -109,13 +109,13 @@ class {{ service.name }}RestTransport({{ service.name }}Transport):
         if self._operations_client is None:
             from google.api_core import grpc_helpers
 
-            self_signed_jwt_kwargs = cls._get_self_signed_jwt_kwargs(self._host, self._scopes)
-
             self._operations_client = operations_v1.OperationsClient(
                 grpc_helpers.create_channel(
                     self._host,
                     credentials=self._credentials,
-                    **self_signed_jwt_kwargs,
+                    default_scopes=cls.AUTH_SCOPES,
+                    scopes=self._scopes,
+                    default_host=cls.DEFAULT_HOST,
                     options=[
                         ("grpc.max_send_message_length", -1),
                         ("grpc.max_receive_message_length", -1),

gapic/templates/setup.py.j2

@@ -27,7 +27,7 @@ setuptools.setup(
     platforms='Posix; MacOS X; Windows',
     include_package_data=True,
     install_requires=(
-        'google-api-core[grpc] >= 1.22.2, < 2.0.0dev',
+        'google-api-core[grpc] >= 1.26.0, < 2.0.0dev',
         'libcst >= 0.2.5',
         'proto-plus >= 1.15.0',
         'packaging >= 14.3',

gapic/templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2

@@ -29,7 +29,6 @@ from {{ (api.naming.module_namespace + (api.naming.versioned_module_name,) + ser
 {% endif %}
 from {{ (api.naming.module_namespace + (api.naming.versioned_module_name,) + service.meta.address.subpackage)|join(".") }}.services.{{ service.name|snake_case }} import transports
 from {{ (api.naming.module_namespace + (api.naming.versioned_module_name,) + service.meta.address.subpackage)|join(".") }}.services.{{ service.name|snake_case }}.transports.base import _GOOGLE_AUTH_VERSION
-from {{ (api.naming.module_namespace + (api.naming.versioned_module_name,) + service.meta.address.subpackage)|join(".") }}.services.{{ service.name|snake_case }}.transports.base import _API_CORE_VERSION
 from google.api_core import client_options
 from google.api_core import exceptions as core_exceptions
 from google.api_core import grpc_helpers
@@ -55,8 +54,9 @@ from google.iam.v1 import policy_pb2  # type: ignore
 {% endfilter %}
 
 
-# TODO(busunkim): Once google-api-core >= 1.26.0 is required:
-# - Delete all the api-core and auth "less than" test cases
+# TODO(busunkim): Once google-auth >= 1.25.0 is required transitively
+# through google-api-core:
+# - Delete the auth "less than" test cases
 # - Delete these pytest markers (Make the "greater than or equal to" tests the default).
 requires_google_auth_lt_1_25_0 = pytest.mark.skipif(
     packaging.version.parse(_GOOGLE_AUTH_VERSION) >= packaging.version.parse("1.25.0"),
@@ -67,16 +67,6 @@ requires_google_auth_gte_1_25_0 = pytest.mark.skipif(
     reason="This test requires google-auth >= 1.25.0",
 )
 
-requires_api_core_lt_1_26_0 = pytest.mark.skipif(
-    packaging.version.parse(_API_CORE_VERSION) >= packaging.version.parse("1.26.0"),
-    reason="This test requires google-api-core < 1.26.0",
-)
-
-requires_api_core_gte_1_26_0 = pytest.mark.skipif(
-    packaging.version.parse(_API_CORE_VERSION) < packaging.version.parse("1.26.0"),
-    reason="This test requires google-api-core >= 1.26.0",
-)
-
 def client_cert_source_callback():
     return b"cert bytes", b"key bytes"
 
@@ -1610,7 +1600,6 @@ def test_{{ service.name|snake_case }}_transport_auth_adc_old_google_auth(transp
         (transports.{{ service.name }}GrpcAsyncIOTransport, grpc_helpers_async)
     ],
 )
-@requires_api_core_gte_1_26_0
 def test_{{ service.name|snake_case }}_transport_create_channel(transport_class, grpc_helpers):
     # If credentials and host are not provided, the transport class should use
     # ADC credentials.
@@ -1644,78 +1633,6 @@ def test_{{ service.name|snake_case }}_transport_create_channel(transport_class,
         )
         {% endwith %}
 
-
-@pytest.mark.parametrize(
-    "transport_class,grpc_helpers",
-    [
-        (transports.{{ service.name }}GrpcTransport, grpc_helpers),
-        (transports.{{ service.name }}GrpcAsyncIOTransport, grpc_helpers_async)
-    ],
-)
-@requires_api_core_lt_1_26_0
-def test_{{ service.name|snake_case }}_transport_create_channel_old_api_core(transport_class, grpc_helpers):
-    # If credentials and host are not provided, the transport class should use
-    # ADC credentials.
-    with mock.patch.object(google.auth, "default", autospec=True) as adc, mock.patch.object(
-        grpc_helpers, "create_channel", autospec=True
-    ) as create_channel:
-        creds = ga_credentials.AnonymousCredentials()
-        adc.return_value = (creds, None)
-        transport_class(quota_project_id="octopus")
-
-        {% with host = (service.host|default('localhost', true)) %}
-        create_channel.assert_called_with(
-            "{{ host }}{% if ":" not in service.host %}:443{% endif %}",
-            credentials=creds,
-            credentials_file=None,
-            quota_project_id="octopus",
-            scopes=(
-                {% for scope in service.oauth_scopes %}
-                '{{ scope }}',
-                {% endfor %}),
-            ssl_credentials=None,
-            options=[
-                ("grpc.max_send_message_length", -1),
-                ("grpc.max_receive_message_length", -1),
-            ],
-        )
-        {% endwith %}
-
-
-@pytest.mark.parametrize(
-    "transport_class,grpc_helpers",
-    [
-        (transports.{{ service.name }}GrpcTransport, grpc_helpers),
-        (transports.{{ service.name }}GrpcAsyncIOTransport, grpc_helpers_async)
-    ],
-)
-@requires_api_core_lt_1_26_0
-def test_{{ service.name|snake_case }}_transport_create_channel_user_scopes(transport_class, grpc_helpers):
-    # If credentials and host are not provided, the transport class should use
-    # ADC credentials.
-    with mock.patch.object(google.auth, "default", autospec=True) as adc, mock.patch.object(
-        grpc_helpers, "create_channel", autospec=True
-    ) as create_channel:
-        creds = ga_credentials.AnonymousCredentials()
-        adc.return_value = (creds, None)
-        {% with host = (service.host|default('localhost', true)) %}
-
-        transport_class(quota_project_id="octopus", scopes=["1", "2"])
-
-        create_channel.assert_called_with(
-            "{{ host }}{% if ":" not in service.host %}:443{% endif %}",
-            credentials=creds,
-            credentials_file=None,
-            quota_project_id="octopus",
-            scopes=["1", "2"],
-            ssl_credentials=None,
-            options=[
-                ("grpc.max_send_message_length", -1),
-                ("grpc.max_receive_message_length", -1),
-            ],
-        )
-        {% endwith %}
-
 {% endif %}
 
 {% if 'grpc' in opts.transport %}