chore: require protobuf ≥ 4.25.8

google/api_core/grpc_helpers.py

@@ -27,25 +27,7 @@
 
 from google.api_core import exceptions, general_helpers
 
-PROTOBUF_VERSION = google.protobuf.__version__
-
-# The grpcio-gcp package only has support for protobuf < 4
-if PROTOBUF_VERSION[0:2] == "3.":  # pragma: NO COVER
-    try:
-        import grpc_gcp
-
-        warnings.warn(
-            """Support for grpcio-gcp is deprecated. This feature will be
-            removed from `google-api-core` after January 1, 2024. If you need to
-            continue to use this feature, please pin to a specific version of
-            `google-api-core`.""",
-            DeprecationWarning,
-        )
-        HAS_GRPC_GCP = True
-    except ImportError:
-        HAS_GRPC_GCP = False
-else:
-    HAS_GRPC_GCP = False
+HAS_GRPC_GCP = False
 
 
 # The list of gRPC Callable interfaces that return iterators.
@@ -366,8 +348,7 @@ def create_channel(
               result in `ValueError` as this combination  is not yet supported.
 
         kwargs: Additional key-word args passed to
-            :func:`grpc_gcp.secure_channel` or :func:`grpc.secure_channel`.
-            Note: `grpc_gcp` is only supported in environments with protobuf < 4.0.0.
+            :func:`grpc.secure_channel`.
 
     Returns:
         grpc.Channel: The created channel.
@@ -393,20 +374,6 @@ def create_channel(
         default_host=default_host,
     )
 
-    # Note that grpcio-gcp is deprecated
-    if HAS_GRPC_GCP:  # pragma: NO COVER
-        if compression is not None and compression != grpc.Compression.NoCompression:
-            warnings.warn(
-                "The `compression` argument is ignored for grpc_gcp.secure_channel creation.",
-                DeprecationWarning,
-            )
-        if attempt_direct_path:
-            warnings.warn(
-                """The `attempt_direct_path` argument is ignored for grpc_gcp.secure_channel creation.""",
-                DeprecationWarning,
-            )
-        return grpc_gcp.secure_channel(target, composite_credentials, **kwargs)
-
     if attempt_direct_path:
         target = _modify_target_for_direct_path(target)
 

noxfile.py

@@ -221,29 +221,16 @@ def default(session, install_grpc=True, prerelease=False, install_async_rest=Fal
 
 @nox.session(python=PYTHON_VERSIONS)
 @nox.parametrize(
-    ["install_grpc_gcp", "install_grpc", "install_async_rest"],
+    ["install_grpc", "install_async_rest"],
     [
-        (False, True, False),  # Run unit tests with grpcio installed
-        (True, True, False),  # Run unit tests with grpcio/grpcio-gcp installed
-        (False, False, False),  # Run unit tests without grpcio installed
-        (False, True, True),  # Run unit tests with grpcio and async rest installed
+        (True, False),  # Run unit tests with grpcio installed
+        (False, False),  # Run unit tests without grpcio installed
+        (True, True),  # Run unit tests with grpcio and async rest installed
     ],
 )
-def unit(session, install_grpc_gcp, install_grpc, install_async_rest):
+def unit(session, install_grpc, install_async_rest):
     """Run the unit test suite."""
 
-    # `grpcio-gcp` doesn't support protobuf 4+.
-    # Remove extra `grpcgcp` when protobuf 3.x is dropped.
-    # https://github.com/googleapis/python-api-core/issues/594
-    if install_grpc_gcp:
-        constraints_path = str(
-            CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
-        )
-        # Install grpcio-gcp
-        session.install("-e", ".[grpcgcp]", "-c", constraints_path)
-        # Install protobuf < 4.0.0
-        session.install("protobuf<4.0.0")
-
     default(
         session=session,
         install_grpc=install_grpc,

pyproject.toml

@@ -45,7 +45,7 @@ classifiers = [
 ]
 dependencies = [
   "googleapis-common-protos >= 1.56.2, < 2.0.0",
-  "protobuf >= 3.19.5, < 7.0.0, != 3.20.0, != 3.20.1, != 4.21.0, != 4.21.1, != 4.21.2, != 4.21.3, != 4.21.4, != 4.21.5",
+  "protobuf >= 4.25.8, < 7.0.0",
   "proto-plus >= 1.22.3, < 2.0.0",
   "proto-plus >= 1.25.0, < 2.0.0; python_version >= '3.13'",
   "google-auth >= 2.14.1, < 3.0.0",
@@ -67,8 +67,7 @@ grpc = [
   "grpcio-status >= 1.49.1, < 2.0.0; python_version >= '3.11'",
   "grpcio-status >= 1.75.1, < 2.0.0; python_version >= '3.14'",
 ]
-grpcgcp = ["grpcio-gcp >= 0.2.2, < 1.0.0"]
-grpcio-gcp = ["grpcio-gcp >= 0.2.2, < 1.0.0"]
+
 
 [tool.setuptools.dynamic]
 version = { attr = "google.api_core.version.__version__" }
@@ -94,11 +93,7 @@ filterwarnings = [
   # Remove once https://github.com/protocolbuffers/protobuf/issues/12186 is fixed
   "ignore:.*custom tp_new.*in Python 3.14:DeprecationWarning",
 
-  # Remove once support for grpcio-gcp is deprecated
-  # See https://github.com/googleapis/python-api-core/blob/42e8b6e6f426cab749b34906529e8aaf3f133d75/google/api_core/grpc_helpers.py#L39-L45
-  "ignore:.*Support for grpcio-gcp is deprecated:DeprecationWarning",
-  "ignore: The `compression` argument is ignored for grpc_gcp.secure_channel creation:DeprecationWarning",
-  "ignore:The `attempt_direct_path` argument is ignored for grpc_gcp.secure_channel creation:DeprecationWarning",
+
   # Remove once the minimum supported version of googleapis-common-protos is 1.62.0
   "ignore:.*pkg_resources.declare_namespace:DeprecationWarning",
   "ignore:.*pkg_resources is deprecated as an API:DeprecationWarning",