feat(storage): add better version metadata to calls (#5507)

Adding a new file that should be maintained auotmatically by
release-please.

Updates: #2749

storage/internal/version.go

@@ -0,0 +1,18 @@
+// Copyright 2022 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.
+
+package internal
+
+// Version is the current tagged release of the library.
+const Version = "1.20.0"

storage/storage.go

@@ -40,6 +40,7 @@ import (
 	"cloud.google.com/go/internal/optional"
 	"cloud.google.com/go/internal/trace"
 	"cloud.google.com/go/internal/version"
+	"cloud.google.com/go/storage/internal"
 	gapic "cloud.google.com/go/storage/internal/apiv2"
 	"github.com/googleapis/gax-go/v2"
 	"golang.org/x/oauth2/google"
@@ -69,7 +70,7 @@ var (
 	errMethodNotValid = fmt.Errorf("storage: HTTP method should be one of %v", reflect.ValueOf(signedURLMethods).MapKeys())
 )
 
-var userAgent = fmt.Sprintf("gcloud-golang-storage/%s", version.Repo)
+var userAgent = fmt.Sprintf("gcloud-golang-storage/%s", internal.Version)
 
 const (
 	// ScopeFullControl grants permissions to manage your
@@ -91,7 +92,7 @@ const (
 	defaultConnPoolSize = 4
 )
 
-var xGoogHeader = fmt.Sprintf("gl-go/%s gccl/%s", version.Go(), version.Repo)
+var xGoogHeader = fmt.Sprintf("gl-go/%s gccl/%s", version.Go(), internal.Version)
 
 func setClientHeader(headers http.Header) {
 	headers.Set("x-goog-api-client", xGoogHeader)