just task

build-tools/src/main/java/org/elasticsearch/gradle/transportversion/TransportVersionTask.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+package org.elasticsearch.gradle.transportversion;
+
+import org.elasticsearch.gradle.LoggedExec;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.Project;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.TaskAction;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+@CacheableTask
+public class TransportVersionTask extends DefaultTask {
+    private static final String NAME = "generate-transport-version";
+
+    @TaskAction
+    public void run() throws IOException {
+            System.out.println("TransportVersionTask run");
+            try(var output = new PrintWriter(new FileWriter("server/src/main/java/org/elasticsearch/TransportVersion.java", true))){
+                output.println("heee");
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+    }
+}

build.gradle

@@ -16,6 +16,7 @@ import org.elasticsearch.gradle.Version
 import org.elasticsearch.gradle.internal.BaseInternalPluginBuildPlugin
 import org.elasticsearch.gradle.internal.ResolveAllDependencies
 import org.elasticsearch.gradle.internal.info.BuildParams
+import org.elasticsearch.gradle.transportversion.TransportVersionTask
 import org.elasticsearch.gradle.util.GradleUtils
 import org.gradle.plugins.ide.eclipse.model.AccessRule
 import org.gradle.plugins.ide.eclipse.model.ProjectDependency
@@ -219,6 +220,8 @@ allprojects {
     }
   }
 
+
+
   /*
    * Remove assemble/dependenciesInfo on all qa projects because we don't
    * need to publish artifacts for them.

server/build.gradle

@@ -7,6 +7,7 @@
  */
 
 import org.elasticsearch.gradle.internal.info.BuildParams
+import org.elasticsearch.gradle.transportversion.TransportVersionTask
 
 apply plugin: 'elasticsearch.build'
 apply plugin: 'elasticsearch.publish'
@@ -250,3 +251,5 @@ tasks.named("licenseHeaders").configure {
 }
 
 tasks.withType(Checkstyle.class).configureEach { t -> t.getMaxHeapSize().set("2g") }
+
+tasks.register(TransportVersionTask.NAME, TransportVersionTask.class)