Add explicit dependency to validatePom and generatePom tasks (opensearch-project#12909)

Signed-off-by: Zelin Hao <zelinhao@amazon.com>

Author: zelinh

CHANGELOG.md

@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased 2.x]
 ### Added
+- Add explicit dependency to validatePom and generatePom tasks ([#12909](https://github.com/opensearch-project/OpenSearch/pull/12909))
 
 ### Dependencies
 - Bump `asm` from 9.6 to 9.7 ([#12908](https://github.com/opensearch-project/OpenSearch/pull/12908))

buildSrc/src/main/java/org/opensearch/gradle/pluginzip/Publish.java

@@ -91,9 +91,6 @@ public void apply(Project project) {
                 addLocalMavenRepo(project);
                 addZipArtifact(project);
                 Task validatePluginZipPom = project.getTasks().findByName("validatePluginZipPom");
-                if (validatePluginZipPom != null) {
-                    validatePluginZipPom.dependsOn("generatePomFileForNebulaPublication");
-                }
 
                 // There are number of tasks prefixed by 'publishPluginZipPublication', f.e.:
                 // publishPluginZipPublicationToZipStagingRepository, publishPluginZipPublicationToMavenLocal
@@ -102,7 +99,11 @@ public void apply(Project project) {
                     .filter(t -> t.getName().startsWith("publishPluginZipPublicationTo"))
                     .collect(Collectors.toSet());
                 if (!publishPluginZipPublicationToTasks.isEmpty()) {
-                    publishPluginZipPublicationToTasks.forEach(t -> t.dependsOn("generatePomFileForNebulaPublication"));
+                    if (validatePluginZipPom != null) {
+                        publishPluginZipPublicationToTasks.forEach(t -> t.dependsOn(validatePluginZipPom));
+                    } else {
+                        publishPluginZipPublicationToTasks.forEach(t -> t.dependsOn("generatePomFileForNebulaPublication"));
+                    }
                 }
             } else {
                 project.getLogger()

buildSrc/src/main/java/org/opensearch/gradle/precommit/PomValidationPrecommitPlugin.java

@@ -53,12 +53,19 @@ public TaskProvider<? extends Task> createTask(Project project) {
             TaskProvider<PomValidationTask> validateTask = project.getTasks()
                 .register("validate" + publicationName + "Pom", PomValidationTask.class);
             validatePom.configure(t -> t.dependsOn(validateTask));
+            TaskProvider<GenerateMavenPom> generateMavenPom = project.getTasks()
+                .withType(GenerateMavenPom.class)
+                .named("generatePomFileFor" + publicationName + "Publication");
             validateTask.configure(task -> {
-                GenerateMavenPom generateMavenPom = project.getTasks()
-                    .withType(GenerateMavenPom.class)
-                    .getByName("generatePomFileFor" + publicationName + "Publication");
                 task.dependsOn(generateMavenPom);
-                task.getPomFile().fileValue(generateMavenPom.getDestination());
+                task.getPomFile().fileProvider(generateMavenPom.map(GenerateMavenPom::getDestination));
+                publishing.getPublications().all(publicationForPomGen -> {
+                    task.mustRunAfter(
+                        project.getTasks()
+                            .withType(GenerateMavenPom.class)
+                            .getByName("generatePomFileFor" + Util.capitalize(publicationForPomGen.getName()) + "Publication")
+                    );
+                });
             });
         });
 

buildSrc/src/main/java/org/opensearch/gradle/precommit/PomValidationTask.java

@@ -106,6 +106,7 @@ private <T> void validateNonNull(String element, T value, Runnable validator) {
 
     private void validateString(String element, String value) {
         validateNonNull(element, value, () -> validateNonEmpty(element, value, s -> s.trim().isEmpty()));
+        getLogger().info(element + " with value " + value + " is validated.");
     }
 
     private <T> void validateCollection(String element, Collection<T> value, Consumer<T> validator) {