chore: make version embedding more robust

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/GoogleUtils.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2020 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
+ *
+ *     https://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 com.google.cloud.bigtable;
+
+import com.google.api.core.InternalApi;
+
+/** Utility to get the current version of the Bigtable client. */
+@InternalApi("For internal use only")
+// Note: this file MUST be named GoogleUtils.java so that it can be picked up by releasetool
+public class GoogleUtils {
+  public static final String BIGTABLE_CLIENT_VERSION =
+      "1.16.1-SNAPSHOT"; // {x-version-update:google-cloud-bigtable:current}
+}

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/EnhancedBigtableStubSettings.java

@@ -20,7 +20,6 @@
 import com.google.api.gax.batching.BatchingSettings;
 import com.google.api.gax.batching.FlowControlSettings;
 import com.google.api.gax.batching.FlowController.LimitExceededBehavior;
-import com.google.api.gax.core.GaxProperties;
 import com.google.api.gax.core.GoogleCredentialsProvider;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
 import com.google.api.gax.retrying.RetrySettings;
@@ -30,6 +29,7 @@
 import com.google.api.gax.rpc.StubSettings;
 import com.google.api.gax.rpc.TransportChannelProvider;
 import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.bigtable.GoogleUtils;
 import com.google.cloud.bigtable.data.v2.models.ConditionalRowMutation;
 import com.google.cloud.bigtable.data.v2.models.KeyOffset;
 import com.google.cloud.bigtable.data.v2.models.Query;
@@ -544,10 +544,7 @@ private Builder() {
               .putAll(
                   BigtableStubSettings.defaultApiClientHeaderProviderBuilder().build().getHeaders())
               // GrpcHeaderInterceptor treats the `user-agent` as a magic string
-              .put(
-                  "user-agent",
-                  "bigtable-java/"
-                      + GaxProperties.getLibraryVersion(EnhancedBigtableStubSettings.class))
+              .put("user-agent", "bigtable-java/" + GoogleUtils.BIGTABLE_CLIENT_VERSION)
               .build();
       setInternalHeaderProvider(FixedHeaderProvider.create(headers));
 

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/data/v2/stub/EnhancedBigtableStubTest.java

@@ -159,7 +159,7 @@ public void testUserAgent() throws InterruptedException {
     assertThat(metadataInterceptor.headers).hasSize(1);
     Metadata metadata = metadataInterceptor.headers.take();
     assertThat(metadata.get(Metadata.Key.of("user-agent", Metadata.ASCII_STRING_MARSHALLER)))
-        .contains("bigtable-java/");
+        .containsMatch("bigtable-java/\\d+\\.\\d+\\.\\d+(?:-SNAPSHOT)?");
   }
 
   private static class MetadataInterceptor implements ServerInterceptor {