fix: pass gRPC config options to gRPC channel creation (#26)

* fix: pass gRPC config options to grpc channel creation

* regen spanner_grpc_transport.py to include changes (via synth)

Co-authored-by: larkee <larkee@users.noreply.github.com>

google/cloud/spanner_v1/gapic/transports/spanner_grpc_transport.py

@@ -107,6 +107,9 @@ def create_channel(
             pkg_resources.resource_string(__name__, _SPANNER_GRPC_CONFIG)
         )
         options = [(grpc_gcp.API_CONFIG_CHANNEL_ARG, grpc_gcp_config)]
+        if "options" in kwargs:
+            options.extend(kwargs["options"])
+        kwargs["options"] = options
         return google.api_core.grpc_helpers.create_channel(
             address, credentials=credentials, scopes=cls._OAUTH_SCOPES, **kwargs
         )

synth.py

@@ -62,6 +62,9 @@
     "\g<1>grpc_gcp_config = grpc_gcp.api_config_from_text_pb("
     "\g<1>    pkg_resources.resource_string(__name__, _SPANNER_GRPC_CONFIG))"
     "\g<1>options = [(grpc_gcp.API_CONFIG_CHANNEL_ARG, grpc_gcp_config)]"
+    "\g<1>if 'options' in kwargs:"
+    "\g<1>    options.extend(kwargs['options'])"
+    "\g<1>kwargs['options'] = options"
     "\g<0>",
 )
 s.replace(