Make buildSrc's custom Gradle tasks consistently abstract

Closes gh-41272

buildSrc/src/main/java/org/springframework/boot/build/ExtractResources.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,15 +21,13 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 
 import org.gradle.api.DefaultTask;
 import org.gradle.api.GradleException;
 import org.gradle.api.Task;
 import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.MapProperty;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.OutputDirectory;
 import org.gradle.api.tasks.TaskAction;
@@ -42,54 +40,30 @@ import org.springframework.util.PropertyPlaceholderHelper;
  *
  * @author Andy Wilkinson
  */
-public class ExtractResources extends DefaultTask {
+public abstract class ExtractResources extends DefaultTask {
 
 	private final PropertyPlaceholderHelper propertyPlaceholderHelper = new PropertyPlaceholderHelper("${", "}");
 
-	private final Map<String, String> properties = new HashMap<>();
-
-	private final DirectoryProperty destinationDirectory;
-
-	private List<String> resourceNames = new ArrayList<>();
-
-	public ExtractResources() {
-		this.destinationDirectory = getProject().getObjects().directoryProperty();
-	}
-
 	@Input
-	public List<String> getResourceNames() {
+	public abstract ListProperty<String> getResourceNames();
-		return this.resourceNames;
-	}
-
-	public void setResourcesNames(List<String> resourceNames) {
-		this.resourceNames = resourceNames;
-	}
 
 	@OutputDirectory
-	public DirectoryProperty getDestinationDirectory() {
+	public abstract DirectoryProperty getDestinationDirectory();
-		return this.destinationDirectory;
-	}
-
-	public void property(String name, String value) {
-		this.properties.put(name, value);
-	}
 
 	@Input
-	public Map<String, String> getProperties() {
+	public abstract MapProperty<String, String> getProperties();
-		return this.properties;
-	}
 
 	@TaskAction
 	void extractResources() throws IOException {
-		for (String resourceName : this.resourceNames) {
+		for (String resourceName : getResourceNames().get()) {
 			InputStream resourceStream = getClass().getClassLoader().getResourceAsStream(resourceName);
 			if (resourceStream == null) {
 				throw new GradleException("Resource '" + resourceName + "' does not exist");
 			}
 			String resource = FileCopyUtils.copyToString(new InputStreamReader(resourceStream, StandardCharsets.UTF_8));
-			resource = this.propertyPlaceholderHelper.replacePlaceholders(resource, this.properties::get);
+			resource = this.propertyPlaceholderHelper.replacePlaceholders(resource, getProperties().get()::get);
 			FileCopyUtils.copy(resource,
-					new FileWriter(this.destinationDirectory.file(resourceName).get().getAsFile()));
+					new FileWriter(getDestinationDirectory().file(resourceName).get().getAsFile()));
 		}
 	}
 

buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java

@@ -129,8 +129,8 @@ class JavaConventions {
 		ExtractResources extractLegalResources = project.getTasks()
 			.create("extractLegalResources", ExtractResources.class);
 		extractLegalResources.getDestinationDirectory().set(project.getLayout().getBuildDirectory().dir("legal"));
-		extractLegalResources.setResourcesNames(Arrays.asList("LICENSE.txt", "NOTICE.txt"));
+		extractLegalResources.getResourceNames().set(Arrays.asList("LICENSE.txt", "NOTICE.txt"));
-		extractLegalResources.property("version", project.getVersion().toString());
+		extractLegalResources.getProperties().put("version", project.getVersion().toString());
 		SourceSetContainer sourceSets = project.getExtensions().getByType(SourceSetContainer.class);
 		Set<String> sourceJarTaskNames = sourceSets.stream()
 			.map(SourceSet::getSourcesJarTaskName)

buildSrc/src/main/java/org/springframework/boot/build/SyncAppSource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2023 the original author or authors.
+ * Copyright 2021-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,6 @@ package org.springframework.boot.build;
 
 import org.gradle.api.DefaultTask;
 import org.gradle.api.file.DirectoryProperty;
-import org.gradle.api.model.ObjectFactory;
 import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputDirectory;
@@ -31,45 +30,29 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class SyncAppSource extends DefaultTask {
+public abstract class SyncAppSource extends DefaultTask {
-
-	private final DirectoryProperty sourceDirectory;
-
-	private final DirectoryProperty destinationDirectory;
-
-	private final Property<String> pluginVersion;
 
 	public SyncAppSource() {
-		ObjectFactory objects = getProject().getObjects();
+		getPluginVersion().convention(getProject().provider(() -> getProject().getVersion().toString()));
-		this.sourceDirectory = objects.directoryProperty();
-		this.destinationDirectory = objects.directoryProperty();
-		this.pluginVersion = objects.property(String.class)
-			.convention(getProject().provider(() -> getProject().getVersion().toString()));
 	}
 
+	@InputDirectory
+	public abstract DirectoryProperty getSourceDirectory();
+
+	@OutputDirectory
+	public abstract DirectoryProperty getDestinationDirectory();
+
+	@Input
+	public abstract Property<String> getPluginVersion();
+
 	@TaskAction
 	void syncAppSources() {
 		getProject().sync((copySpec) -> {
-			copySpec.from(this.sourceDirectory);
+			copySpec.from(getSourceDirectory());
-			copySpec.into(this.destinationDirectory);
+			copySpec.into(getDestinationDirectory());
 			copySpec.filter((line) -> line.replace("id \"org.springframework.boot\"",
 					"id \"org.springframework.boot\" version \"" + getProject().getVersion() + "\""));
 		});
 	}
 
-	@InputDirectory
-	public DirectoryProperty getSourceDirectory() {
-		return this.sourceDirectory;
-	}
-
-	@OutputDirectory
-	public DirectoryProperty getDestinationDirectory() {
-		return this.destinationDirectory;
-	}
-
-	@Input
-	public Property<String> getPluginVersion() {
-		return this.pluginVersion;
-	}
-
 }

buildSrc/src/main/java/org/springframework/boot/build/autoconfigure/AutoConfigurationMetadata.java

@@ -28,11 +28,15 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Properties;
 import java.util.Set;
-import java.util.concurrent.Callable;
 
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.tasks.Classpath;
+import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.PathSensitive;
 import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.TaskAction;
@@ -48,47 +52,45 @@ import org.springframework.core.CollectionFactory;
  * @author Andy Wilkinson
  * @author Scott Frederick
  */
-public class AutoConfigurationMetadata extends DefaultTask {
+public abstract class AutoConfigurationMetadata extends DefaultTask {
 
 	private static final String COMMENT_START = "#";
 
 	private final String moduleName;
 
-	private SourceSet sourceSet;
+	private FileCollection classesDirectories;
-
-	private File outputFile;
 
 	public AutoConfigurationMetadata() {
-		getInputs()
-			.file((Callable<File>) () -> new File(this.sourceSet.getOutput().getResourcesDir(),
-					"META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports"))
-			.withPathSensitivity(PathSensitivity.RELATIVE)
-			.withPropertyName("org.springframework.boot.autoconfigure.AutoConfiguration");
-
-		dependsOn((Callable<String>) () -> this.sourceSet.getProcessResourcesTaskName());
 		getProject().getConfigurations()
 			.maybeCreate(AutoConfigurationPlugin.AUTO_CONFIGURATION_METADATA_CONFIGURATION_NAME);
 		this.moduleName = getProject().getName();
 	}
 
 	public void setSourceSet(SourceSet sourceSet) {
-		this.sourceSet = sourceSet;
+		getAutoConfigurationImports().set(new File(sourceSet.getOutput().getResourcesDir(),
+				"META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports"));
+		this.classesDirectories = sourceSet.getOutput().getClassesDirs();
+		dependsOn(sourceSet.getOutput());
 	}
 
+	@InputFile
+	@PathSensitive(PathSensitivity.RELATIVE)
+	abstract RegularFileProperty getAutoConfigurationImports();
+
 	@OutputFile
-	public File getOutputFile() {
+	public abstract RegularFileProperty getOutputFile();
-		return this.outputFile;
-	}
 
-	public void setOutputFile(File outputFile) {
+	@Classpath
-		this.outputFile = outputFile;
+	FileCollection getClassesDirectories() {
+		return this.classesDirectories;
 	}
 
 	@TaskAction
 	void documentAutoConfiguration() throws IOException {
 		Properties autoConfiguration = readAutoConfiguration();
-		getOutputFile().getParentFile().mkdirs();
+		File outputFile = getOutputFile().get().getAsFile();
-		try (FileWriter writer = new FileWriter(getOutputFile())) {
+		outputFile.getParentFile().mkdirs();
+		try (FileWriter writer = new FileWriter(outputFile)) {
 			autoConfiguration.store(writer, null);
 		}
 	}
@@ -120,8 +122,7 @@ public class AutoConfigurationMetadata extends DefaultTask {
 	 * @return auto-configurations
 	 */
 	private List<String> readAutoConfigurationsFile() throws IOException {
-		File file = new File(this.sourceSet.getOutput().getResourcesDir(),
+		File file = getAutoConfigurationImports().getAsFile().get();
-				"META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports");
 		if (!file.exists()) {
 			return Collections.emptyList();
 		}
@@ -140,7 +141,7 @@ public class AutoConfigurationMetadata extends DefaultTask {
 
 	private File findClassFile(String className) {
 		String classFileName = className.replace(".", "/") + ".class";
-		for (File classesDir : this.sourceSet.getOutput().getClassesDirs()) {
+		for (File classesDir : this.classesDirectories) {
 			File classFile = new File(classesDir, classFileName);
 			if (classFile.isFile()) {
 				return classFile;

buildSrc/src/main/java/org/springframework/boot/build/autoconfigure/AutoConfigurationPlugin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.Callable;
 
 import com.tngtech.archunit.core.domain.JavaClass;
 import com.tngtech.archunit.lang.ArchCondition;
@@ -94,10 +93,9 @@ public class AutoConfigurationPlugin implements Plugin<Project> {
 					.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
 				task.setSourceSet(main);
 				task.dependsOn(main.getClassesTaskName());
-				task.setOutputFile(new File(project.getBuildDir(), "auto-configuration-metadata.properties"));
+				task.getOutputFile().set(new File(project.getBuildDir(), "auto-configuration-metadata.properties"));
 				project.getArtifacts()
-					.add(AutoConfigurationPlugin.AUTO_CONFIGURATION_METADATA_CONFIGURATION_NAME,
+					.add(AutoConfigurationPlugin.AUTO_CONFIGURATION_METADATA_CONFIGURATION_NAME, task.getOutputFile(),
-							project.provider((Callable<File>) task::getOutputFile),
 							(artifact) -> artifact.builtBy(task));
 			});
 			project.getPlugins().withType(ArchitecturePlugin.class, (architecturePlugin) -> {

buildSrc/src/main/java/org/springframework/boot/build/autoconfigure/DocumentAutoConfigurationClasses.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,6 +31,7 @@ import java.util.stream.Collectors;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
 import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.OutputDirectory;
 import org.gradle.api.tasks.TaskAction;
@@ -42,12 +43,10 @@ import org.springframework.util.StringUtils;
  *
  * @author Andy Wilkinson
  */
-public class DocumentAutoConfigurationClasses extends DefaultTask {
+public abstract class DocumentAutoConfigurationClasses extends DefaultTask {
 
 	private FileCollection autoConfiguration;
 
-	private File outputDir;
-
 	@InputFiles
 	public FileCollection getAutoConfiguration() {
 		return this.autoConfiguration;
@@ -58,13 +57,7 @@ public class DocumentAutoConfigurationClasses extends DefaultTask {
 	}
 
 	@OutputDirectory
-	public File getOutputDir() {
+	public abstract RegularFileProperty getOutputDir();
-		return this.outputDir;
-	}
-
-	public void setOutputDir(File outputDir) {
-		this.outputDir = outputDir;
-	}
 
 	@TaskAction
 	void documentAutoConfigurationClasses() throws IOException {
@@ -80,9 +73,10 @@ public class DocumentAutoConfigurationClasses extends DefaultTask {
 	}
 
 	private void writeTable(AutoConfiguration autoConfigurationClasses) throws IOException {
-		this.outputDir.mkdirs();
+		File outputDir = getOutputDir().getAsFile().get();
+		outputDir.mkdirs();
 		try (PrintWriter writer = new PrintWriter(
-				new FileWriter(new File(this.outputDir, autoConfigurationClasses.module + ".adoc")))) {
+				new FileWriter(new File(outputDir, autoConfigurationClasses.module + ".adoc")))) {
 			writer.println("[cols=\"4,1\"]");
 			writer.println("|===");
 			writer.println("| Configuration Class | Links");

buildSrc/src/main/java/org/springframework/boot/build/bom/BomExtension.java

@@ -149,7 +149,7 @@ public class BomExtension {
 				}
 				MavenExec generateEffectiveBom = this.project.getTasks()
 					.create("generateEffectiveBom", MavenExec.class);
-				generateEffectiveBom.setProjectDir(generatedBomDir);
+				generateEffectiveBom.getProjectDir().set(generatedBomDir);
 				File effectiveBom = new File(this.project.getBuildDir(),
 						"generated/effective-bom/" + this.project.getName() + "-effective-bom.xml");
 				generateEffectiveBom.args("--settings", "settings.xml", "help:effective-pom",

buildSrc/src/main/java/org/springframework/boot/build/bom/CheckBom.java

@@ -45,7 +45,7 @@ import org.springframework.boot.build.bom.bomr.version.DependencyVersion;
  *
  * @author Andy Wilkinson
  */
-public class CheckBom extends DefaultTask {
+public abstract class CheckBom extends DefaultTask {
 
 	private final BomExtension bom;
 

buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForConflicts.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class CheckClasspathForConflicts extends DefaultTask {
+public abstract class CheckClasspathForConflicts extends DefaultTask {
 
 	private final List<Predicate<String>> ignores = new ArrayList<>();
 

buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForProhibitedDependencies.java

@@ -34,7 +34,7 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class CheckClasspathForProhibitedDependencies extends DefaultTask {
+public abstract class CheckClasspathForProhibitedDependencies extends DefaultTask {
 
 	private static final Set<String> PROHIBITED_GROUPS = Set.of("org.codehaus.groovy", "org.eclipse.jetty.toolchain",
 			"commons-logging", "org.apache.geronimo.specs", "com.sun.activation");

buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForUnconstrainedDirectDependencies.java

@@ -34,7 +34,7 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class CheckClasspathForUnconstrainedDirectDependencies extends DefaultTask {
+public abstract class CheckClasspathForUnconstrainedDirectDependencies extends DefaultTask {
 
 	private Configuration classpath;
 

buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForUnnecessaryExclusions.java

@@ -48,7 +48,7 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class CheckClasspathForUnnecessaryExclusions extends DefaultTask {
+public abstract class CheckClasspathForUnnecessaryExclusions extends DefaultTask {
 
 	private static final Map<String, String> SPRING_BOOT_DEPENDENCIES_PROJECT = Collections.singletonMap("path",
 			":spring-boot-project:spring-boot-dependencies");

buildSrc/src/main/java/org/springframework/boot/build/cli/HomebrewFormula.java

@@ -18,16 +18,15 @@ package org.springframework.boot.build.cli;
 
 import java.io.File;
 import java.security.MessageDigest;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
-import org.gradle.api.file.RegularFile;
+import org.gradle.api.file.DirectoryProperty;
-import org.gradle.api.provider.Provider;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.OutputDirectory;
 import org.gradle.api.tasks.PathSensitive;
@@ -42,62 +41,14 @@ import org.springframework.boot.build.artifacts.ArtifactRelease;
  *
  * @author Andy Wilkinson
  */
-public class HomebrewFormula extends DefaultTask {
+public abstract class HomebrewFormula extends DefaultTask {
-
-	private Provider<RegularFile> archive;
-
-	private File template;
-
-	private File outputDir;
 
 	public HomebrewFormula() {
-		getInputs().property("version", getProject().provider(getProject()::getVersion));
-	}
-
-	@InputFile
-	@PathSensitive(PathSensitivity.RELATIVE)
-	public RegularFile getArchive() {
-		return this.archive.get();
-	}
-
-	public void setArchive(Provider<RegularFile> archive) {
-		this.archive = archive;
-	}
-
-	@InputFile
-	@PathSensitive(PathSensitivity.RELATIVE)
-	public File getTemplate() {
-		return this.template;
-	}
-
-	public void setTemplate(File template) {
-		this.template = template;
-	}
-
-	@OutputDirectory
-	public File getOutputDir() {
-		return this.outputDir;
-	}
-
-	public void setOutputDir(File outputDir) {
-		this.outputDir = outputDir;
-	}
-
-	protected void createDescriptor(Map<String, Object> additionalProperties) {
-		getProject().copy((copy) -> {
-			copy.from(this.template);
-			copy.into(this.outputDir);
-			copy.expand(getProperties(additionalProperties));
-		});
-	}
-
-	private Map<String, Object> getProperties(Map<String, Object> additionalProperties) {
-		Map<String, Object> properties = new HashMap<>(additionalProperties);
 		Project project = getProject();
-		properties.put("hash", sha256(this.archive.get().getAsFile()));
+		MapProperty<String, Object> properties = getProperties();
-		properties.put("repo", ArtifactRelease.forProject(project).getDownloadRepo());
+		properties.put("hash", getArchive().map((archive) -> sha256(archive.getAsFile())));
-		properties.put("project", project);
+		getProperties().put("repo", ArtifactRelease.forProject(project).getDownloadRepo());
-		return properties;
+		getProperties().put("version", project.getVersion().toString());
 	}
 
 	private String sha256(File file) {
@@ -110,9 +61,27 @@ public class HomebrewFormula extends DefaultTask {
 		}
 	}
 
+	@InputFile
+	@PathSensitive(PathSensitivity.RELATIVE)
+	public abstract RegularFileProperty getArchive();
+
+	@InputFile
+	@PathSensitive(PathSensitivity.RELATIVE)
+	public abstract RegularFileProperty getTemplate();
+
+	@OutputDirectory
+	public abstract DirectoryProperty getOutputDir();
+
+	@Input
+	abstract MapProperty<String, Object> getProperties();
+
 	@TaskAction
 	void createFormula() {
-		createDescriptor(Collections.emptyMap());
+		getProject().copy((copy) -> {
+			copy.from(getTemplate());
+			copy.into(getOutputDir());
+			copy.expand(getProperties().get());
+		});
 	}
 
 }

buildSrc/src/main/java/org/springframework/boot/build/constraints/DocumentConstrainedVersions.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,10 +21,8 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.io.PrintWriter;
 
-import javax.inject.Inject;
-
 import org.gradle.api.DefaultTask;
-import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.provider.SetProperty;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.OutputFile;
@@ -37,38 +35,22 @@ import org.springframework.boot.build.constraints.ExtractVersionConstraints.Cons
  *
  * @author Andy Wilkinson
  */
-public class DocumentConstrainedVersions extends DefaultTask {
+public abstract class DocumentConstrainedVersions extends DefaultTask {
-
-	private final SetProperty<ConstrainedVersion> constrainedVersions;
-
-	private File outputFile;
-
-	@Inject
-	public DocumentConstrainedVersions(ObjectFactory objectFactory) {
-		this.constrainedVersions = objectFactory.setProperty(ConstrainedVersion.class);
-	}
 
 	@Input
-	public SetProperty<ConstrainedVersion> getConstrainedVersions() {
+	public abstract SetProperty<ConstrainedVersion> getConstrainedVersions();
-		return this.constrainedVersions;
-	}
 
 	@OutputFile
-	public File getOutputFile() {
+	public abstract RegularFileProperty getOutputFile();
-		return this.outputFile;
-	}
-
-	public void setOutputFile(File outputFile) {
-		this.outputFile = outputFile;
-	}
 
 	@TaskAction
 	public void documentConstrainedVersions() throws IOException {
-		this.outputFile.getParentFile().mkdirs();
+		File outputFile = getOutputFile().get().getAsFile();
-		try (PrintWriter writer = new PrintWriter(new FileWriter(this.outputFile))) {
+		outputFile.getParentFile().mkdirs();
+		try (PrintWriter writer = new PrintWriter(new FileWriter(outputFile))) {
 			writer.println("|===");
 			writer.println("| Group ID | Artifact ID | Version");
-			for (ConstrainedVersion constrainedVersion : this.constrainedVersions.get()) {
+			for (ConstrainedVersion constrainedVersion : getConstrainedVersions().get()) {
 				writer.println();
 				writer.printf("| `%s`%n", constrainedVersion.getGroup());
 				writer.printf("| `%s`%n", constrainedVersion.getArtifact());

buildSrc/src/main/java/org/springframework/boot/build/constraints/DocumentVersionProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,10 +21,8 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.io.PrintWriter;
 
-import javax.inject.Inject;
-
 import org.gradle.api.DefaultTask;
-import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.provider.SetProperty;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.OutputFile;
@@ -37,38 +35,22 @@ import org.springframework.boot.build.constraints.ExtractVersionConstraints.Vers
  *
  * @author Christoph Dreis
  */
-public class DocumentVersionProperties extends DefaultTask {
+public abstract class DocumentVersionProperties extends DefaultTask {
-
-	private final SetProperty<VersionProperty> versionProperties;
-
-	private File outputFile;
-
-	@Inject
-	public DocumentVersionProperties(ObjectFactory objectFactory) {
-		this.versionProperties = objectFactory.setProperty(VersionProperty.class);
-	}
 
 	@Input
-	public SetProperty<VersionProperty> getVersionProperties() {
+	public abstract SetProperty<VersionProperty> getVersionProperties();
-		return this.versionProperties;
-	}
 
 	@OutputFile
-	public File getOutputFile() {
+	public abstract RegularFileProperty getOutputFile();
-		return this.outputFile;
-	}
-
-	public void setOutputFile(File outputFile) {
-		this.outputFile = outputFile;
-	}
 
 	@TaskAction
 	public void documentVersionProperties() throws IOException {
-		this.outputFile.getParentFile().mkdirs();
+		File outputFile = getOutputFile().getAsFile().get();
-		try (PrintWriter writer = new PrintWriter(new FileWriter(this.outputFile))) {
+		outputFile.getParentFile().mkdirs();
+		try (PrintWriter writer = new PrintWriter(new FileWriter(outputFile))) {
 			writer.println("|===");
 			writer.println("| Library | Version Property");
-			for (VersionProperty versionProperty : this.versionProperties.get()) {
+			for (VersionProperty versionProperty : getVersionProperties().get()) {
 				writer.println();
 				writer.printf("| `%s`%n", versionProperty.getLibraryName());
 				writer.printf("| `%s`%n", versionProperty.getVersionProperty());

buildSrc/src/main/java/org/springframework/boot/build/constraints/ExtractVersionConstraints.java

@@ -48,7 +48,7 @@ import org.springframework.boot.build.bom.Library;
  *
  * @author Andy Wilkinson
  */
-public class ExtractVersionConstraints extends DefaultTask {
+public abstract class ExtractVersionConstraints extends DefaultTask {
 
 	private final Configuration configuration;
 

buildSrc/src/main/java/org/springframework/boot/build/context/properties/CheckAdditionalSpringConfigurationMetadata.java

@@ -46,21 +46,16 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class CheckAdditionalSpringConfigurationMetadata extends SourceTask {
+public abstract class CheckAdditionalSpringConfigurationMetadata extends SourceTask {
 
 	private final File projectDir;
 
-	private final RegularFileProperty reportLocation;
-
 	public CheckAdditionalSpringConfigurationMetadata() {
 		this.projectDir = getProject().getProjectDir();
-		this.reportLocation = getProject().getObjects().fileProperty();
 	}
 
 	@OutputFile
-	public RegularFileProperty getReportLocation() {
+	public abstract RegularFileProperty getReportLocation();
-		return this.reportLocation;
-	}
 
 	@Override
 	@InputFiles

buildSrc/src/main/java/org/springframework/boot/build/context/properties/CheckSpringConfigurationMetadata.java

@@ -32,6 +32,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.GradleException;
 import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.provider.ListProperty;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.OutputFile;
@@ -45,41 +46,23 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class CheckSpringConfigurationMetadata extends DefaultTask {
+public abstract class CheckSpringConfigurationMetadata extends DefaultTask {
 
-	private List<String> exclusions = new ArrayList<>();
+	private final Path projectRoot;
-
-	private final File projectDir;
-
-	private final RegularFileProperty reportLocation;
-
-	private final RegularFileProperty metadataLocation;
 
 	public CheckSpringConfigurationMetadata() {
-		this.projectDir = getProject().getProjectDir();
+		this.projectRoot = getProject().getProjectDir().toPath();
-		this.metadataLocation = getProject().getObjects().fileProperty();
-		this.reportLocation = getProject().getObjects().fileProperty();
 	}
 
 	@OutputFile
-	public RegularFileProperty getReportLocation() {
+	public abstract RegularFileProperty getReportLocation();
-		return this.reportLocation;
-	}
 
 	@InputFile
 	@PathSensitive(PathSensitivity.RELATIVE)
-	public RegularFileProperty getMetadataLocation() {
+	public abstract RegularFileProperty getMetadataLocation();
-		return this.metadataLocation;
-	}
-
-	public void setExclusions(List<String> exclusions) {
-		this.exclusions = exclusions;
-	}
 
 	@Input
-	public List<String> getExclusions() {
+	public abstract ListProperty<String> getExclusions();
-		return this.exclusions;
-	}
 
 	@TaskAction
 	void check() throws JsonParseException, IOException {
@@ -95,8 +78,8 @@ public class CheckSpringConfigurationMetadata extends DefaultTask {
 	@SuppressWarnings("unchecked")
 	private Report createReport() throws IOException, JsonParseException, JsonMappingException {
 		ObjectMapper objectMapper = new ObjectMapper();
-		File file = this.metadataLocation.get().getAsFile();
+		File file = getMetadataLocation().get().getAsFile();
-		Report report = new Report(this.projectDir.toPath().relativize(file.toPath()));
+		Report report = new Report(this.projectRoot.relativize(file.toPath()));
 		Map<String, Object> json = objectMapper.readValue(file, Map.class);
 		List<Map<String, Object>> properties = (List<Map<String, Object>>) json.get("properties");
 		for (Map<String, Object> property : properties) {
@@ -109,7 +92,7 @@ public class CheckSpringConfigurationMetadata extends DefaultTask {
 	}
 
 	private boolean isExcluded(String propertyName) {
-		for (String exclusion : this.exclusions) {
+		for (String exclusion : getExclusions().get()) {
 			if (propertyName.equals(exclusion)) {
 				return true;
 			}

buildSrc/src/main/java/org/springframework/boot/build/context/properties/DocumentConfigurationProperties.java

@@ -16,11 +16,11 @@
 
 package org.springframework.boot.build.context.properties;
 
-import java.io.File;
 import java.io.IOException;
 
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
+import org.gradle.api.file.DirectoryProperty;
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.OutputDirectory;
@@ -36,12 +36,10 @@ import org.springframework.boot.build.context.properties.Snippet.Config;
  * @author Andy Wilkinson
  * @author Phillip Webb
  */
-public class DocumentConfigurationProperties extends DefaultTask {
+public abstract class DocumentConfigurationProperties extends DefaultTask {
 
 	private FileCollection configurationPropertyMetadata;
 
-	private File outputDir;
-
 	@InputFiles
 	@PathSensitive(PathSensitivity.RELATIVE)
 	public FileCollection getConfigurationPropertyMetadata() {
@@ -53,13 +51,7 @@ public class DocumentConfigurationProperties extends DefaultTask {
 	}
 
 	@OutputDirectory
-	public File getOutputDir() {
+	public abstract DirectoryProperty getOutputDir();
-		return this.outputDir;
-	}
-
-	public void setOutputDir(File outputDir) {
-		this.outputDir = outputDir;
-	}
 
 	@TaskAction
 	void documentConfigurationProperties() throws IOException {
@@ -83,7 +75,7 @@ public class DocumentConfigurationProperties extends DefaultTask {
 		snippets.add("application-properties.testcontainers", "Testcontainers Properties",
 				this::testcontainersPrefixes);
 		snippets.add("application-properties.testing", "Testing Properties", this::testingPrefixes);
-		snippets.writeTo(this.outputDir.toPath());
+		snippets.writeTo(getOutputDir().getAsFile().get().toPath());
 	}
 
 	private void corePrefixes(Config config) {

buildSrc/src/main/java/org/springframework/boot/build/devtools/DocumentDevtoolsPropertyDefaults.java

@@ -39,16 +39,13 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class DocumentDevtoolsPropertyDefaults extends DefaultTask {
+public abstract class DocumentDevtoolsPropertyDefaults extends DefaultTask {
 
 	private final Configuration devtools;
 
-	private final RegularFileProperty outputFile;
-
 	public DocumentDevtoolsPropertyDefaults() {
 		this.devtools = getProject().getConfigurations().create("devtools");
-		this.outputFile = getProject().getObjects().fileProperty();
+		getOutputFile().convention(getProject().getLayout()
-		this.outputFile.convention(getProject().getLayout()
 			.getBuildDirectory()
 			.file("docs/generated/using/devtools-property-defaults.adoc"));
 		Map<String, String> dependency = new HashMap<>();
@@ -63,9 +60,7 @@ public class DocumentDevtoolsPropertyDefaults extends DefaultTask {
 	}
 
 	@OutputFile
-	public RegularFileProperty getOutputFile() {
+	public abstract RegularFileProperty getOutputFile();
-		return this.outputFile;
-	}
 
 	@TaskAction
 	void documentPropertyDefaults() throws IOException {
@@ -86,7 +81,7 @@ public class DocumentDevtoolsPropertyDefaults extends DefaultTask {
 	}
 
 	private void documentProperties(Map<String, String> properties) throws IOException {
-		try (PrintWriter writer = new PrintWriter(new FileWriter(this.outputFile.getAsFile().get()))) {
+		try (PrintWriter writer = new PrintWriter(new FileWriter(getOutputFile().getAsFile().get()))) {
 			writer.println("[cols=\"3,1\"]");
 			writer.println("|===");
 			writer.println("| Name | Default Value");

buildSrc/src/main/java/org/springframework/boot/build/docs/ApplicationRunner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,6 +34,7 @@ import org.gradle.api.Task;
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.MapProperty;
 import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.Input;
@@ -47,29 +48,17 @@ import org.gradle.internal.jvm.Jvm;
  *
  * @author Andy Wilkinson
  */
-public class ApplicationRunner extends DefaultTask {
+public abstract class ApplicationRunner extends DefaultTask {
-
-	private final RegularFileProperty output = getProject().getObjects().fileProperty();
-
-	private final ListProperty<String> args = getProject().getObjects().listProperty(String.class);
-
-	private final Property<String> mainClass = getProject().getObjects().property(String.class);
-
-	private final Property<String> expectedLogging = getProject().getObjects().property(String.class);
-
-	private final Property<String> applicationJar = getProject().getObjects()
-		.property(String.class)
-		.convention("/opt/apps/myapp.jar");
-
-	private final Map<String, String> normalizations = new HashMap<>();
 
 	private FileCollection classpath;
 
-	@OutputFile
+	public ApplicationRunner() {
-	public RegularFileProperty getOutput() {
+		getApplicationJar().convention("/opt/apps/myapp.jar");
-		return this.output;
 	}
 
+	@OutputFile
+	public abstract RegularFileProperty getOutput();
+
 	@Classpath
 	public FileCollection getClasspath() {
 		return this.classpath;
@@ -80,37 +69,27 @@ public class ApplicationRunner extends DefaultTask {
 	}
 
 	@Input
-	public ListProperty<String> getArgs() {
+	public abstract ListProperty<String> getArgs();
-		return this.args;
-	}
 
 	@Input
-	public Property<String> getMainClass() {
+	public abstract Property<String> getMainClass();
-		return this.mainClass;
-	}
 
 	@Input
-	public Property<String> getExpectedLogging() {
+	public abstract Property<String> getExpectedLogging();
-		return this.expectedLogging;
-	}
 
 	@Input
-	Map<String, String> getNormalizations() {
+	abstract MapProperty<String, String> getNormalizations();
-		return this.normalizations;
-	}
 
 	@Input
-	public Property<String> getApplicationJar() {
+	abstract Property<String> getApplicationJar();
-		return this.applicationJar;
-	}
 
 	public void normalizeTomcatPort() {
-		this.normalizations.put("(Tomcat started on port )[\\d]+( \\(http\\))", "$18080$2");
+		getNormalizations().put("(Tomcat started on port )[\\d]+( \\(http\\))", "$18080$2");
-		this.normalizations.put("(Tomcat initialized with port )[\\d]+( \\(http\\))", "$18080$2");
+		getNormalizations().put("(Tomcat initialized with port )[\\d]+( \\(http\\))", "$18080$2");
 	}
 
 	public void normalizeLiveReloadPort() {
-		this.normalizations.put("(LiveReload server is running on port )[\\d]+", "$135729");
+		getNormalizations().put("(LiveReload server is running on port )[\\d]+", "$135729");
 	}
 
 	@TaskAction
@@ -123,9 +102,9 @@ public class ApplicationRunner extends DefaultTask {
 			.stream()
 			.map(File::getAbsolutePath)
 			.collect(Collectors.joining(File.pathSeparator)));
-		command.add(this.mainClass.get());
+		command.add(getMainClass().get());
-		command.addAll(this.args.get());
+		command.addAll(getArgs().get());
-		File outputFile = this.output.getAsFile().get();
+		File outputFile = getOutput().getAsFile().get();
 		Process process = new ProcessBuilder().redirectOutput(outputFile)
 			.redirectError(outputFile)
 			.command(command)
@@ -137,7 +116,7 @@ public class ApplicationRunner extends DefaultTask {
 
 	private void awaitLogging(Process process) {
 		long end = System.currentTimeMillis() + 60000;
-		String expectedLogging = this.expectedLogging.get();
+		String expectedLogging = getExpectedLogging().get();
 		while (System.currentTimeMillis() < end) {
 			for (String line : outputLines()) {
 				if (line.contains(expectedLogging)) {
@@ -152,7 +131,7 @@ public class ApplicationRunner extends DefaultTask {
 	}
 
 	private List<String> outputLines() {
-		Path outputPath = this.output.get().getAsFile().toPath();
+		Path outputPath = getOutput().get().getAsFile().toPath();
 		try {
 			return Files.readAllLines(outputPath);
 		}
@@ -164,7 +143,7 @@ public class ApplicationRunner extends DefaultTask {
 	private void normalizeLogging() {
 		List<String> outputLines = outputLines();
 		List<String> normalizedLines = normalize(outputLines);
-		Path outputPath = this.output.get().getAsFile().toPath();
+		Path outputPath = getOutput().get().getAsFile().toPath();
 		try {
 			Files.write(outputPath, normalizedLines);
 		}
@@ -175,9 +154,9 @@ public class ApplicationRunner extends DefaultTask {
 
 	private List<String> normalize(List<String> lines) {
 		List<String> normalizedLines = lines;
-		Map<String, String> normalizations = new HashMap<>(this.normalizations);
+		Map<String, String> normalizations = new HashMap<>(getNormalizations().get());
 		normalizations.put("(Starting .* using Java .* with PID [\\d]+ \\().*( started by ).*( in ).*(\\))",
-				"$1" + this.applicationJar.get() + "$2myuser$3/opt/apps/$4");
+				"$1" + getApplicationJar().get() + "$2myuser$3/opt/apps/$4");
 		for (Entry<String, String> normalization : normalizations.entrySet()) {
 			Pattern pattern = Pattern.compile(normalization.getKey());
 			normalizedLines = normalize(normalizedLines, pattern, normalization.getValue());

buildSrc/src/main/java/org/springframework/boot/build/mavenplugin/DocumentPluginGoals.java

@@ -21,10 +21,12 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.List;
-import java.util.Map;
 
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.provider.MapProperty;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.OutputDirectory;
@@ -39,46 +41,22 @@ import org.springframework.boot.build.mavenplugin.PluginXmlParser.Plugin;
  *
  * @author Andy Wilkinson
  */
-public class DocumentPluginGoals extends DefaultTask {
+public abstract class DocumentPluginGoals extends DefaultTask {
 
 	private final PluginXmlParser parser = new PluginXmlParser();
 
-	private File pluginXml;
-
-	private File outputDir;
-
-	private Map<String, String> goalSections;
-
 	@OutputDirectory
-	public File getOutputDir() {
+	public abstract DirectoryProperty getOutputDir();
-		return this.outputDir;
-	}
-
-	public void setOutputDir(File outputDir) {
-		this.outputDir = outputDir;
-	}
 
 	@Input
-	public Map<String, String> getGoalSections() {
+	public abstract MapProperty<String, String> getGoalSections();
-		return this.goalSections;
-	}
-
-	public void setGoalSections(Map<String, String> goalSections) {
-		this.goalSections = goalSections;
-	}
 
 	@InputFile
-	public File getPluginXml() {
+	public abstract RegularFileProperty getPluginXml();
-		return this.pluginXml;
-	}
-
-	public void setPluginXml(File pluginXml) {
-		this.pluginXml = pluginXml;
-	}
 
 	@TaskAction
 	public void documentPluginGoals() throws IOException {
-		Plugin plugin = this.parser.parse(this.pluginXml);
+		Plugin plugin = this.parser.parse(getPluginXml().getAsFile().get());
 		writeOverview(plugin);
 		for (Mojo mojo : plugin.getMojos()) {
 			documentMojo(plugin, mojo);
@@ -86,7 +64,8 @@ public class DocumentPluginGoals extends DefaultTask {
 	}
 
 	private void writeOverview(Plugin plugin) throws IOException {
-		try (PrintWriter writer = new PrintWriter(new FileWriter(new File(this.outputDir, "overview.adoc")))) {
+		try (PrintWriter writer = new PrintWriter(
+				new FileWriter(new File(getOutputDir().getAsFile().get(), "overview.adoc")))) {
 			writer.println("[cols=\"1,3\"]");
 			writer.println("|===");
 			writer.println("| Goal | Description");
@@ -101,7 +80,8 @@ public class DocumentPluginGoals extends DefaultTask {
 	}
 
 	private void documentMojo(Plugin plugin, Mojo mojo) throws IOException {
-		try (PrintWriter writer = new PrintWriter(new FileWriter(new File(this.outputDir, mojo.getGoal() + ".adoc")))) {
+		try (PrintWriter writer = new PrintWriter(
+				new FileWriter(new File(getOutputDir().getAsFile().get(), mojo.getGoal() + ".adoc")))) {
 			String sectionId = goalSectionId(mojo);
 			writer.println();
 			writer.println();
@@ -139,7 +119,7 @@ public class DocumentPluginGoals extends DefaultTask {
 	}
 
 	private String goalSectionId(Mojo mojo) {
-		String goalSection = this.goalSections.get(mojo.getGoal());
+		String goalSection = getGoalSections().getting(mojo.getGoal()).get();
 		if (goalSection == null) {
 			throw new IllegalStateException("Goal '" + mojo.getGoal() + "' has not be assigned to a section");
 		}

buildSrc/src/main/java/org/springframework/boot/build/mavenplugin/MavenExec.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,8 +24,12 @@ import java.nio.file.Path;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.JavaExec;
+import org.gradle.api.tasks.PathSensitive;
 import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.TaskExecutionException;
 import org.gradle.process.internal.ExecException;
@@ -37,29 +41,29 @@ import org.slf4j.LoggerFactory;
  *
  * @author Andy Wilkinson
  */
-public class MavenExec extends JavaExec {
+public abstract class MavenExec extends JavaExec {
 
 	private final Logger log = LoggerFactory.getLogger(MavenExec.class);
 
-	private File projectDir;
-
 	public MavenExec() {
 		setClasspath(mavenConfiguration(getProject()));
 		args("--batch-mode");
 		getMainClass().set("org.apache.maven.cli.MavenCli");
+		getPom().set(getProjectDir().file("pom.xml"));
 	}
 
-	public void setProjectDir(File projectDir) {
+	@Internal
-		this.projectDir = projectDir;
+	public abstract DirectoryProperty getProjectDir();
-		getInputs().file(new File(projectDir, "pom.xml"))
+
-			.withPathSensitivity(PathSensitivity.RELATIVE)
+	@InputFile
-			.withPropertyName("pom");
+	@PathSensitive(PathSensitivity.RELATIVE)
-	}
+	abstract RegularFileProperty getPom();
 
 	@Override
 	public void exec() {
-		workingDir(this.projectDir);
+		File workingDir = getProjectDir().getAsFile().get();
-		systemProperty("maven.multiModuleProjectDirectory", this.projectDir.getAbsolutePath());
+		workingDir(workingDir);
+		systemProperty("maven.multiModuleProjectDirectory", workingDir.getAbsolutePath());
 		try {
 			Path logFile = Files.createTempFile(getName(), ".log");
 			try {
@@ -97,9 +101,4 @@ public class MavenExec extends JavaExec {
 		});
 	}
 
-	@Internal
-	public File getProjectDir() {
-		return this.projectDir;
-	}
-
 }

buildSrc/src/main/java/org/springframework/boot/build/mavenplugin/MavenPluginPlugin.java

@@ -168,7 +168,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 				project.getObjects().named(DocsType.class, "maven-repository")));
 		RuntimeClasspathMavenRepository runtimeClasspathMavenRepository = project.getTasks()
 			.create("runtimeClasspathMavenRepository", RuntimeClasspathMavenRepository.class);
-		runtimeClasspathMavenRepository.getOutputDirectory()
+		runtimeClasspathMavenRepository.getOutputDir()
 			.set(new File(project.getBuildDir(), "runtime-classpath-repository"));
 		project.getDependencies()
 			.components((components) -> components.all(MavenRepositoryComponentMetadataRule.class));
@@ -195,8 +195,8 @@ public class MavenPluginPlugin implements Plugin<Project> {
 	private void addDocumentPluginGoalsTask(Project project, MavenExec generatePluginDescriptorTask) {
 		DocumentPluginGoals task = project.getTasks().create("documentPluginGoals", DocumentPluginGoals.class);
 		File pluginXml = new File(generatePluginDescriptorTask.getOutputs().getFiles().getSingleFile(), "plugin.xml");
-		task.setPluginXml(pluginXml);
+		task.getPluginXml().set(pluginXml);
-		task.setOutputDir(new File(project.getBuildDir(), "docs/generated/goals/"));
+		task.getOutputDir().set(new File(project.getBuildDir(), "docs/generated/goals/"));
 		task.dependsOn(generatePluginDescriptorTask);
 	}
 
@@ -210,7 +210,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 
 	private MavenExec createGenerateHelpMojoTask(Project project, File helpMojoDir) {
 		MavenExec task = project.getTasks().create("generateHelpMojo", MavenExec.class);
-		task.setProjectDir(helpMojoDir);
+		task.getProjectDir().set(helpMojoDir);
 		task.args("org.apache.maven.plugins:maven-plugin-plugin:3.6.1:helpmojo");
 		task.getOutputs().dir(new File(helpMojoDir, "target/generated-sources/plugin"));
 		return task;
@@ -261,7 +261,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 		FormatHelpMojoSource formatHelpMojoSource = project.getTasks()
 			.create("formatHelpMojoSource", FormatHelpMojoSource.class);
 		formatHelpMojoSource.setGenerator(generateHelpMojoTask);
-		formatHelpMojoSource.setOutputDir(generatedHelpMojoDir);
+		formatHelpMojoSource.getOutputDir().set(generatedHelpMojoDir);
 		return formatHelpMojoSource;
 	}
 
@@ -284,7 +284,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 			.dir(new File(mavenDir, "target/classes/org"))
 			.withPathSensitivity(PathSensitivity.RELATIVE)
 			.withPropertyName("plugin classes");
-		generatePluginDescriptor.setProjectDir(mavenDir);
+		generatePluginDescriptor.getProjectDir().set(mavenDir);
 		return generatePluginDescriptor;
 	}
 
@@ -295,8 +295,9 @@ public class MavenPluginPlugin implements Plugin<Project> {
 
 	private void addPrepareMavenBinariesTask(Project project) {
 		TaskProvider<PrepareMavenBinaries> task = project.getTasks()
-			.register("prepareMavenBinaries", PrepareMavenBinaries.class, (prepareMavenBinaries) -> prepareMavenBinaries
+			.register("prepareMavenBinaries", PrepareMavenBinaries.class,
-				.setOutputDir(new File(project.getBuildDir(), "maven-binaries")));
+					(prepareMavenBinaries) -> prepareMavenBinaries.getOutputDir()
+						.set(new File(project.getBuildDir(), "maven-binaries")));
 		project.getTasks()
 			.getByName(IntegrationTestPlugin.INT_TEST_TASK_NAME)
 			.getInputs()
@@ -324,12 +325,10 @@ public class MavenPluginPlugin implements Plugin<Project> {
 				.map((dir) -> dir.file("extracted-versions.properties")));
 	}
 
-	public static class FormatHelpMojoSource extends DefaultTask {
+	public abstract static class FormatHelpMojoSource extends DefaultTask {
 
 		private Task generator;
 
-		private File outputDir;
-
 		void setGenerator(Task generator) {
 			this.generator = generator;
 			getInputs().files(this.generator)
@@ -338,13 +337,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 		}
 
 		@OutputDirectory
-		public File getOutputDir() {
+		public abstract DirectoryProperty getOutputDir();
-			return this.outputDir;
-		}
-
-		void setOutputDir(File outputDir) {
-			this.outputDir = outputDir;
-		}
 
 		@TaskAction
 		void syncAndFormat() {
@@ -357,7 +350,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 
 		private void save(File output, FileEdit edit) {
 			Path relativePath = output.toPath().relativize(edit.getFile().toPath());
-			Path outputLocation = this.outputDir.toPath().resolve(relativePath);
+			Path outputLocation = getOutputDir().getAsFile().get().toPath().resolve(relativePath);
 			try {
 				Files.createDirectories(outputLocation.getParent());
 				Files.writeString(outputLocation, edit.getFormattedContent());
@@ -401,21 +394,16 @@ public class MavenPluginPlugin implements Plugin<Project> {
 
 	}
 
-	public static class RuntimeClasspathMavenRepository extends DefaultTask {
+	public abstract static class RuntimeClasspathMavenRepository extends DefaultTask {
 
 		private final Configuration runtimeClasspath;
 
-		private final DirectoryProperty outputDirectory;
-
 		public RuntimeClasspathMavenRepository() {
 			this.runtimeClasspath = getProject().getConfigurations().getByName("runtimeClasspathWithMetadata");
-			this.outputDirectory = getProject().getObjects().directoryProperty();
 		}
 
 		@OutputDirectory
-		public DirectoryProperty getOutputDirectory() {
+		public abstract DirectoryProperty getOutputDir();
-			return this.outputDirectory;
-		}
 
 		@Classpath
 		public Configuration getRuntimeClasspath() {
@@ -429,7 +417,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 					String fileName = result.getFile()
 						.getName()
 						.replace(identifier.getVersion() + "-" + identifier.getVersion(), identifier.getVersion());
-					File repositoryLocation = this.outputDirectory
+					File repositoryLocation = getOutputDir()
 						.dir(identifier.getGroup().replace('.', '/') + "/" + identifier.getModule() + "/"
 								+ identifier.getVersion() + "/" + fileName)
 						.get()
@@ -448,16 +436,10 @@ public class MavenPluginPlugin implements Plugin<Project> {
 
 	}
 
-	public static class ExtractVersionProperties extends DefaultTask {
+	public abstract static class ExtractVersionProperties extends DefaultTask {
-
-		private final RegularFileProperty destination;
 
 		private FileCollection effectiveBoms;
 
-		public ExtractVersionProperties() {
-			this.destination = getProject().getObjects().fileProperty();
-		}
-
 		@InputFiles
 		@PathSensitive(PathSensitivity.RELATIVE)
 		public FileCollection getEffectiveBoms() {
@@ -469,9 +451,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 		}
 
 		@OutputFile
-		public RegularFileProperty getDestination() {
+		public abstract RegularFileProperty getDestination();
-			return this.destination;
-		}
 
 		@TaskAction
 		public void extractVersionProperties() {
@@ -481,7 +461,7 @@ public class MavenPluginPlugin implements Plugin<Project> {
 		}
 
 		private void writeProperties(Properties versions) {
-			File outputFile = this.destination.getAsFile().get();
+			File outputFile = getDestination().getAsFile().get();
 			outputFile.getParentFile().mkdirs();
 			try (Writer writer = new FileWriter(outputFile)) {
 				versions.store(writer, null);

buildSrc/src/main/java/org/springframework/boot/build/mavenplugin/PrepareMavenBinaries.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,14 +16,11 @@
 
 package org.springframework.boot.build.mavenplugin;
 
-import java.io.File;
-import java.util.Arrays;
-import java.util.LinkedHashSet;
-import java.util.Set;
-
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.SetProperty;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.OutputDirectory;
 import org.gradle.api.tasks.TaskAction;
@@ -33,38 +30,22 @@ import org.gradle.api.tasks.TaskAction;
  *
  * @author Andy Wilkinson
  */
-public class PrepareMavenBinaries extends DefaultTask {
+public abstract class PrepareMavenBinaries extends DefaultTask {
-
-	private final Set<String> versions = new LinkedHashSet<>();
-
-	private File outputDir;
 
 	@OutputDirectory
-	public File getOutputDir() {
+	public abstract DirectoryProperty getOutputDir();
-		return this.outputDir;
-	}
-
-	public void setOutputDir(File outputDir) {
-		this.outputDir = outputDir;
-	}
 
 	@Input
-	public Set<String> getVersions() {
+	public abstract SetProperty<String> getVersions();
-		return this.versions;
-	}
-
-	public void versions(String... versions) {
-		this.versions.addAll(Arrays.asList(versions));
-	}
 
 	@TaskAction
 	public void prepareBinaries() {
-		for (String version : this.versions) {
+		for (String version : getVersions().get()) {
 			Configuration configuration = getProject().getConfigurations()
 				.detachedConfiguration(
 						getProject().getDependencies().create("org.apache.maven:apache-maven:" + version + ":bin@zip"));
 			getProject()
-				.copy((copy) -> copy.into(this.outputDir).from(getProject().zipTree(configuration.getSingleFile())));
+				.copy((copy) -> copy.into(getOutputDir()).from(getProject().zipTree(configuration.getSingleFile())));
 		}
 	}
 

buildSrc/src/main/java/org/springframework/boot/build/starters/DocumentStarters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,6 +33,7 @@ import java.util.stream.Stream;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.file.DirectoryProperty;
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.OutputDirectory;
@@ -47,12 +48,10 @@ import org.springframework.util.StringUtils;
  *
  * @author Andy Wilkinson
  */
-public class DocumentStarters extends DefaultTask {
+public abstract class DocumentStarters extends DefaultTask {
 
 	private final Configuration starters;
 
-	private File outputDir;
-
 	public DocumentStarters() {
 		this.starters = getProject().getConfigurations().create("starters");
 		getProject().getGradle().projectsEvaluated((gradle) -> {
@@ -68,13 +67,7 @@ public class DocumentStarters extends DefaultTask {
 	}
 
 	@OutputDirectory
-	public File getOutputDir() {
+	public abstract DirectoryProperty getOutputDir();
-		return this.outputDir;
-	}
-
-	public void setOutputDir(File outputDir) {
-		this.outputDir = outputDir;
-	}
 
 	@InputFiles
 	@PathSensitive(PathSensitivity.RELATIVE)
@@ -106,7 +99,7 @@ public class DocumentStarters extends DefaultTask {
 	}
 
 	private void writeTable(String name, Stream<Starter> starters) {
-		File output = new File(this.outputDir, name + ".adoc");
+		File output = new File(getOutputDir().getAsFile().get(), name + ".adoc");
 		output.getParentFile().mkdirs();
 		try (PrintWriter writer = new PrintWriter(new FileWriter(output))) {
 			writer.println("|===");

buildSrc/src/main/java/org/springframework/boot/build/test/autoconfigure/DocumentTestSlices.java

@@ -32,6 +32,7 @@ import java.util.TreeSet;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
 import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.PathSensitive;
@@ -46,12 +47,10 @@ import org.springframework.util.StringUtils;
  *
  * @author Andy Wilkinson
  */
-public class DocumentTestSlices extends DefaultTask {
+public abstract class DocumentTestSlices extends DefaultTask {
 
 	private FileCollection testSlices;
 
-	private File outputFile;
-
 	@InputFiles
 	@PathSensitive(PathSensitivity.RELATIVE)
 	public FileCollection getTestSlices() {
@@ -63,13 +62,7 @@ public class DocumentTestSlices extends DefaultTask {
 	}
 
 	@OutputFile
-	public File getOutputFile() {
+	public abstract RegularFileProperty getOutputFile();
-		return this.outputFile;
-	}
-
-	public void setOutputFile(File outputFile) {
-		this.outputFile = outputFile;
-	}
 
 	@TaskAction
 	void documentTestSlices() throws IOException {
@@ -94,8 +87,9 @@ public class DocumentTestSlices extends DefaultTask {
 	}
 
 	private void writeTable(Set<TestSlice> testSlices) throws IOException {
-		this.outputFile.getParentFile().mkdirs();
+		File outputFile = getOutputFile().getAsFile().get();
-		try (PrintWriter writer = new PrintWriter(new FileWriter(this.outputFile))) {
+		outputFile.getParentFile().mkdirs();
+		try (PrintWriter writer = new PrintWriter(new FileWriter(outputFile))) {
 			writer.println("[cols=\"d,a\"]");
 			writer.println("|===");
 			writer.println("| Test slice | Imported auto-configuration");

buildSrc/src/main/java/org/springframework/boot/build/test/autoconfigure/TestSliceMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,7 +32,6 @@ import java.util.List;
 import java.util.Properties;
 import java.util.SortedSet;
 import java.util.TreeSet;
-import java.util.concurrent.Callable;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
@@ -41,7 +40,12 @@ import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.tasks.Classpath;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.PathSensitive;
 import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.TaskAction;
@@ -59,44 +63,57 @@ import org.springframework.util.StringUtils;
  *
  * @author Andy Wilkinson
  */
-public class TestSliceMetadata extends DefaultTask {
+public abstract class TestSliceMetadata extends DefaultTask {
 
-	private SourceSet sourceSet;
+	private FileCollection classpath;
 
-	private File outputFile;
+	private FileCollection importsFiles;
+
+	private FileCollection classesDirs;
 
 	public TestSliceMetadata() {
-		getInputs().dir((Callable<File>) () -> this.sourceSet.getOutput().getResourcesDir())
+		Configuration testSliceMetadata = getProject().getConfigurations().maybeCreate("testSliceMetadata");
-			.withPathSensitivity(PathSensitivity.RELATIVE)
+		getProject().afterEvaluate((evaluated) -> evaluated.getArtifacts()
-			.withPropertyName("resources");
+			.add(testSliceMetadata.getName(), getOutputFile(), (artifact) -> artifact.builtBy(this)));
-		dependsOn((Callable<String>) () -> this.sourceSet.getProcessResourcesTaskName());
-		getInputs().files((Callable<FileCollection>) () -> this.sourceSet.getOutput().getClassesDirs())
-			.withPathSensitivity(PathSensitivity.RELATIVE)
-			.withPropertyName("classes");
 	}
 
 	public void setSourceSet(SourceSet sourceSet) {
-		this.sourceSet = sourceSet;
+		this.classpath = sourceSet.getRuntimeClasspath();
+		this.importsFiles = getProject().fileTree(new File(sourceSet.getOutput().getResourcesDir(), "META-INF/spring"),
+				(tree) -> tree.filter((file) -> file.getName().endsWith(".imports")));
+		getSpringFactories().set(new File(sourceSet.getOutput().getResourcesDir(), "META-INF/spring.factories"));
+		this.classesDirs = sourceSet.getOutput().getClassesDirs();
 	}
 
 	@OutputFile
-	public File getOutputFile() {
+	public abstract RegularFileProperty getOutputFile();
-		return this.outputFile;
+
+	@InputFile
+	@PathSensitive(PathSensitivity.RELATIVE)
+	abstract RegularFileProperty getSpringFactories();
+
+	@Classpath
+	FileCollection getClasspath() {
+		return this.classpath;
 	}
 
-	public void setOutputFile(File outputFile) {
+	@InputFiles
-		this.outputFile = outputFile;
+	@PathSensitive(PathSensitivity.RELATIVE)
-		Configuration testSliceMetadata = getProject().getConfigurations().maybeCreate("testSliceMetadata");
+	FileCollection getImportFiles() {
-		getProject().getArtifacts()
+		return this.importsFiles;
-			.add(testSliceMetadata.getName(), getProject().provider((Callable<File>) this::getOutputFile),
+	}
-					(artifact) -> artifact.builtBy(this));
+
+	@Classpath
+	FileCollection getClassesDirs() {
+		return this.classesDirs;
 	}
 
 	@TaskAction
 	void documentTestSlices() throws IOException {
 		Properties testSlices = readTestSlices();
-		getOutputFile().getParentFile().mkdirs();
+		File outputFile = getOutputFile().getAsFile().get();
-		try (FileWriter writer = new FileWriter(getOutputFile())) {
+		outputFile.getParentFile().mkdirs();
+		try (FileWriter writer = new FileWriter(outputFile)) {
 			testSlices.store(writer, null);
 		}
 	}
@@ -104,15 +121,11 @@ public class TestSliceMetadata extends DefaultTask {
 	private Properties readTestSlices() throws IOException {
 		Properties testSlices = CollectionFactory.createSortedProperties(true);
 		try (URLClassLoader classLoader = new URLClassLoader(
-				StreamSupport.stream(this.sourceSet.getRuntimeClasspath().spliterator(), false)
+				StreamSupport.stream(this.classpath.spliterator(), false).map(this::toURL).toArray(URL[]::new))) {
-					.map(this::toURL)
-					.toArray(URL[]::new))) {
 			MetadataReaderFactory metadataReaderFactory = new SimpleMetadataReaderFactory(classLoader);
-			Properties springFactories = readSpringFactories(
+			Properties springFactories = readSpringFactories(getSpringFactories().getAsFile().get());
-					new File(this.sourceSet.getOutput().getResourcesDir(), "META-INF/spring.factories"));
+			readImportsFiles(springFactories, this.importsFiles);
-			readTestSlicesDirectory(springFactories,
+			for (File classesDir : this.classesDirs) {
-					new File(this.sourceSet.getOutput().getResourcesDir(), "META-INF/spring/"));
-			for (File classesDir : this.sourceSet.getOutput().getClassesDirs()) {
 				addTestSlices(testSlices, classesDir, metadataReaderFactory, springFactories);
 			}
 		}
@@ -120,18 +133,14 @@ public class TestSliceMetadata extends DefaultTask {
 	}
 
 	/**
-	 * Reads files from the given directory and puts them in springFactories. The key is
+	 * Reads the given imports files and puts them in springFactories. The key is the file
-	 * the file name, the value is the file contents, split by line, delimited with comma.
+	 * name, the value is the file contents, split by line, delimited with a comma. This
-	 * This is done to mimic the spring.factories structure.
+	 * is done to mimic the spring.factories structure.
 	 * @param springFactories spring.factories parsed as properties
-	 * @param directory directory to scan
+	 * @param importsFiles the imports files to read
 	 */
-	private void readTestSlicesDirectory(Properties springFactories, File directory) {
+	private void readImportsFiles(Properties springFactories, FileCollection importsFiles) {
-		File[] files = directory.listFiles((dir, name) -> name.endsWith(".imports"));
+		for (File file : importsFiles.getFiles()) {
-		if (files == null) {
-			return;
-		}
-		for (File file : files) {
 			try {
 				List<String> lines = removeComments(Files.readAllLines(file.toPath()));
 				String fileNameWithoutExtension = file.getName()

spring-boot-project/spring-boot-tools/spring-boot-cli/src/main/homebrew/spring-boot.rb

@@ -2,8 +2,8 @@ require 'formula'
 
 class SpringBoot < Formula
   homepage 'https://spring.io/projects/spring-boot'
-  url '${repo}/org/springframework/boot/spring-boot-cli/${project.version}/spring-boot-cli-${project.version}-bin.tar.gz'
+  url '${repo}/org/springframework/boot/spring-boot-cli/${version}/spring-boot-cli-${version}-bin.tar.gz'
-  version '${project.version}'
+  version '${version}'
   sha256 '${hash}'
   head 'https://github.com/spring-projects/spring-boot.git', :branch => "main"
 

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/build.gradle

@@ -169,7 +169,7 @@ task xsdResources(type: Sync) {
 }
 
 prepareMavenBinaries {
-	versions "3.9.6", "3.6.3"
+	versions = [ "3.9.6", "3.6.3" ]
 }
 
 artifacts {