feat(bigtable/spanner): add google-c2p dependence to bigtable and spanner

bigtable/bigtable_enablexds.go

@@ -0,0 +1,22 @@
+// Copyright 2021 Google LLC
+// Licensed 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.
+
+//go:build enablexds
+// +build enablexds
+
+package bigtable
+
+import (
+	// Install google-c2p resolver, which is required for direct path.
+	_ "google.golang.org/grpc/xds/googledirectpath"
+)

bigtable/go.sum

@@ -46,26 +46,34 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
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@@ -140,6 +148,7 @@ github.com/google/pprof v0.0.0-20210601050228-01bbb1931b22/go.mod h1:kpwsk12EmLe
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@@ -154,17 +163,22 @@ github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:
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@@ -541,10 +555,12 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
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spanner/client_enablexds.go

@@ -0,0 +1,23 @@
+// Copyright 2021 Google LLC
+//
+// Licensed 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.
+
+//go:build enablexds
+// +build enablexds
+
+package spanner
+
+import (
+	// Install google-c2p resolver, which is required for direct path.
+	_ "google.golang.org/grpc/xds/googledirectpath"
+)