LUCENE-10347: add a helper task 'collectRuntimeJars' that assembles binary artifacts under each module's build 'runtimeJars' folder. (#576)

build.gradle

@@ -181,3 +181,5 @@ apply from: file('gradle/hacks/wipe-temp.gradle')
 apply from: file('gradle/hacks/hashmapAssertions.gradle')
 apply from: file('gradle/hacks/turbocharge-jvm-opts.gradle')
 apply from: file('gradle/hacks/dummy-outputs.gradle')
+
+apply from: file('gradle/pylucene/pylucene.gradle')

gradle/pylucene/pylucene.gradle

@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF 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.
+ */
+
+/*
+ * This script configures some helper tasks used by the sibling PyLucene
+ * project.
+ */
+
+configure(rootProject.ext.mavenProjects, {
+  plugins.withType(JavaPlugin) {
+    /**
+     * Collect the module's primary artifact and any runtime JARs it requires.
+     */
+    tasks.register("collectRuntimeJars", Sync, {
+      // Collect our own artifact.
+      from jar.outputs
+
+      // Collect all dependencies, excluding cross-module deps.
+      from(configurations.runtimeClasspath, {
+        exclude "lucene-*"
+      })
+
+      into project.layout.buildDirectory.file("runtimeJars")
+    })
+  }
+})