Store IDE hook state as an input on SpotlessTaskImpl so that we don…

…'t violate any configuration cache rules.

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/IdeHook.java

@@ -19,12 +19,34 @@
 import java.io.IOException;
 import java.nio.file.Files;
 
+import javax.annotation.Nullable;
+
+import org.gradle.api.Project;
+
 import com.diffplug.common.base.Errors;
 import com.diffplug.common.io.ByteStreams;
 import com.diffplug.spotless.DirtyState;
 import com.diffplug.spotless.Formatter;
+import com.diffplug.spotless.NoLambda;
 
 class IdeHook {
+	static class State extends NoLambda.EqualityBasedOnSerialization {
+		final @Nullable String path;
+		final boolean useStdIn;
+		final boolean useStdOut;
+
+		State(Project project) {
+			path = (String) project.findProperty(PROPERTY);
+			if (path != null) {
+				useStdIn = project.hasProperty(USE_STD_IN);
+				useStdOut = project.hasProperty(USE_STD_OUT);
+			} else {
+				useStdIn = false;
+				useStdOut = false;
+			}
+		}
+	}
+
 	final static String PROPERTY = "spotlessIdeHook";
 	final static String USE_STD_IN = "spotlessIdeHookUseStdIn";
 	final static String USE_STD_OUT = "spotlessIdeHookUseStdOut";
@@ -33,9 +55,8 @@ private static void dumpIsClean() {
 		System.err.println("IS CLEAN");
 	}
 
-	static void performHook(SpotlessTaskImpl spotlessTask) {
-		String path = (String) spotlessTask.getProject().property(PROPERTY);
-		File file = new File(path);
+	static void performHook(SpotlessTaskImpl spotlessTask, IdeHook.State state) {
+		File file = new File(state.path);
 		if (!file.isAbsolute()) {
 			System.err.println("Argument passed to " + PROPERTY + " must be an absolute path");
 			return;
@@ -50,7 +71,7 @@ static void performHook(SpotlessTaskImpl spotlessTask) {
 					}
 				}
 				byte[] bytes;
-				if (spotlessTask.getProject().hasProperty(USE_STD_IN)) {
+				if (state.useStdIn) {
 					bytes = ByteStreams.toByteArray(System.in);
 				} else {
 					bytes = Files.readAllBytes(file.toPath());
@@ -63,7 +84,7 @@ static void performHook(SpotlessTaskImpl spotlessTask) {
 					System.err.println("Run 'spotlessDiagnose' for details https://github.com/diffplug/spotless/blob/main/PADDEDCELL.md");
 				} else {
 					System.err.println("IS DIRTY");
-					if (spotlessTask.getProject().hasProperty(USE_STD_OUT)) {
+					if (state.useStdOut) {
 						dirty.writeCanonicalTo(System.out);
 					} else {
 						dirty.writeCanonicalTo(file);

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/SpotlessExtensionImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2022 DiffPlug
+ * Copyright 2016-2024 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,15 +48,15 @@ public SpotlessExtensionImpl(Project project) {
 
 	@Override
 	protected void createFormatTasks(String name, FormatExtension formatExtension) {
-		boolean isIdeHook = project.hasProperty(IdeHook.PROPERTY);
+		IdeHook.State ideHook = new IdeHook.State(project);
 		TaskContainer tasks = project.getTasks();
 
 		// create the SpotlessTask
 		String taskName = EXTENSION + SpotlessPlugin.capitalize(name);
 		TaskProvider<SpotlessTaskImpl> spotlessTask = tasks.register(taskName, SpotlessTaskImpl.class, task -> {
 			task.init(getRegisterDependenciesTask().getTaskService());
 			task.setGroup(TASK_GROUP);
-			task.setEnabled(!isIdeHook);
+			task.getIdeHookState().set(ideHook);
 			// clean removes the SpotlessCache, so we have to run after clean
 			task.mustRunAfter(BasePlugin.CLEAN_TASK_NAME);
 		});
@@ -75,23 +75,18 @@ protected void createFormatTasks(String name, FormatExtension formatExtension) {
 		TaskProvider<SpotlessApply> applyTask = tasks.register(taskName + APPLY, SpotlessApply.class, task -> {
 			task.init(spotlessTask.get());
 			task.setGroup(TASK_GROUP);
-			task.setEnabled(!isIdeHook);
+			task.setEnabled(ideHook.path == null);
 			task.dependsOn(spotlessTask);
 		});
 		rootApplyTask.configure(task -> {
-			task.dependsOn(applyTask);
-
-			if (isIdeHook) {
-				// the rootApplyTask is no longer just a marker task, now it does a bit of work itself
-				task.doLast(unused -> IdeHook.performHook(spotlessTask.get()));
-			}
+			task.dependsOn(ideHook.path == null ? applyTask : spotlessTask);
 		});
 
 		TaskProvider<SpotlessCheck> checkTask = tasks.register(taskName + CHECK, SpotlessCheck.class, task -> {
 			SpotlessTaskImpl source = spotlessTask.get();
 			task.setGroup(TASK_GROUP);
 			task.init(source);
-			task.setEnabled(!isIdeHook);
+			task.setEnabled(ideHook.path == null);
 			task.dependsOn(source);
 
 			// if the user runs both, make sure that apply happens first,

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/SpotlessTaskImpl.java

@@ -29,8 +29,10 @@
 import org.gradle.api.GradleException;
 import org.gradle.api.file.DirectoryProperty;
 import org.gradle.api.file.FileSystemOperations;
+import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
 import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.TaskAction;
 import org.gradle.work.ChangeType;
@@ -46,6 +48,9 @@
 
 @CacheableTask
 public abstract class SpotlessTaskImpl extends SpotlessTask {
+	@Input
+	abstract Property<IdeHook.State> getIdeHookState();
+
 	@Internal
 	abstract DirectoryProperty getProjectDir();
 
@@ -69,6 +74,12 @@ Provider<SpotlessTaskService> getTaskServiceProvider() {
 
 	@TaskAction
 	public void performAction(InputChanges inputs) throws Exception {
+		IdeHook.State ideHook = getIdeHookState().getOrNull();
+		if (ideHook != null && ideHook.path != null) {
+			IdeHook.performHook(this, ideHook);
+			return;
+		}
+
 		SpotlessTaskService taskService = getTaskService().get();
 		taskService.registerSourceAlreadyRan(this);
 		if (target == null) {