Fix up-to-date checks for precommit related tasks

buildSrc/src/main/java/org/elasticsearch/gradle/ElasticsearchJavaPlugin.java

@@ -149,7 +149,9 @@ public static void configureConfigurations(Project project) {
 
     private static final Pattern LUCENE_SNAPSHOT_REGEX = Pattern.compile("\\w+-snapshot-([a-z0-9]+)");
 
-    /** Adds repositories used by ES dependencies */
+    /**
+     * Adds repositories used by ES dependencies
+     */
     public static void configureRepositories(Project project) {
         // ensure all repositories use secure urls
         // TODO: remove this with gradle 7.0, which no longer allows insecure urls
@@ -216,7 +218,9 @@ private static void assertRepositoryURIIsSecure(final String repositoryName, fin
         }
     }
 
-    /** Adds compiler settings to the project */
+    /**
+     * Adds compiler settings to the project
+     */
     public static void configureCompile(Project project) {
         project.getExtensions().getExtraProperties().set("compactProfile", "full");
 
@@ -483,8 +487,11 @@ static void configureJars(Project project) {
                     // we put all our distributable files under distributions
                     jarTask.getDestinationDirectory().set(new File(project.getBuildDir(), "distributions"));
                     // fixup the jar manifest
-                    jarTask.doFirst(
-                        t -> {
+                    // Explicitly using an Action interface as java lambdas
+                    // are not supported by Gradle up-to-date checks
+                    jarTask.doFirst(new Action<Task>() {
+                        @Override
+                        public void execute(Task task) {
                             // this doFirst is added before the info plugin, therefore it will run
                             // after the doFirst added by the info plugin, and we can override attributes
                             jarTask.getManifest()
@@ -497,7 +504,7 @@ static void configureJars(Project project) {
                                     )
                                 );
                         }
-                    );
+                    });
                 }
             );
         project.getPluginManager().withPlugin("com.github.johnrengelman.shadow", p -> {

buildSrc/src/main/java/org/elasticsearch/gradle/precommit/CheckstylePrecommitPlugin.java

@@ -21,6 +21,7 @@
 
 import org.elasticsearch.gradle.VersionProperties;
 import org.elasticsearch.gradle.util.Util;
+import org.gradle.api.Action;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.dsl.DependencyHandler;
@@ -62,17 +63,22 @@ public TaskProvider<? extends Task> createTask(Project project) {
             copyCheckstyleConf.configure(t -> t.getInputs().files(checkstyleConfUrl.getFile(), checkstyleSuppressionsUrl.getFile()));
         }
 
-        copyCheckstyleConf.configure(t -> t.doLast(task -> {
-            checkstyleDir.mkdirs();
-            try (InputStream stream = checkstyleConfUrl.openStream()) {
-                Files.copy(stream, checkstyleConf.toPath(), StandardCopyOption.REPLACE_EXISTING);
-            } catch (IOException e) {
-                throw new UncheckedIOException(e);
-            }
-            try (InputStream stream = checkstyleSuppressionsUrl.openStream()) {
-                Files.copy(stream, checkstyleSuppressions.toPath(), StandardCopyOption.REPLACE_EXISTING);
-            } catch (IOException e) {
-                throw new UncheckedIOException(e);
+        // Explicitly using an Action interface as java lambdas
+        // are not supported by Gradle up-to-date checks
+        copyCheckstyleConf.configure(t -> t.doLast(new Action<Task>() {
+            @Override
+            public void execute(Task task) {
+                checkstyleDir.mkdirs();
+                try (InputStream stream = checkstyleConfUrl.openStream()) {
+                    Files.copy(stream, checkstyleConf.toPath(), StandardCopyOption.REPLACE_EXISTING);
+                } catch (IOException e) {
+                    throw new UncheckedIOException(e);
+                }
+                try (InputStream stream = checkstyleSuppressionsUrl.openStream()) {
+                    Files.copy(stream, checkstyleSuppressions.toPath(), StandardCopyOption.REPLACE_EXISTING);
+                } catch (IOException e) {
+                    throw new UncheckedIOException(e);
+                }
             }
         }));
 

buildSrc/src/main/java/org/elasticsearch/gradle/precommit/DependencyLicensesTask.java

@@ -31,6 +31,7 @@
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.OutputDirectory;
 import org.gradle.api.tasks.TaskAction;
 
 import java.io.File;
@@ -223,6 +224,15 @@ public void checkDependencies() throws IOException, NoSuchAlgorithmException {
         if (shaFiles.isEmpty() == false) {
             throw new GradleException("Unused sha files found: \n" + joinFilenames(shaFiles));
         }
+
+    }
+
+    // This is just a marker output folder to allow this task being up-to-date.
+    // The check logic is exception driven so a failed tasks will not be defined
+    // by this output but when successful we can safely mark the task as up-to-date.
+    @OutputDirectory
+    public File getOutputMarker() {
+        return new File(getProject().getBuildDir(), "dependencyLicense");
     }
 
     private void failIfAnyMissing(String item, Boolean exists, String type) {