Add version resource file

Author: swallez

java-client/build.gradle.kts

@@ -36,6 +36,13 @@ java {
     withSourcesJar()
 }
 
+tasks.withType<ProcessResources> {
+    expand(
+        "version" to version,
+        "git_revision" to (rootProject.extra.get("gitHashFull") ?: "unknown")
+    )
+}
+
 tasks.withType<Jar> {
     doFirst {
         if (rootProject.extra.has("gitHashFull")) {

java-client/src/main/resources/co.elastic.clients.elasticsearch/version.properties

@@ -0,0 +1,21 @@
+#
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you 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.
+#
+
+version=${version}
+git_revision=${git_revision}