Merge branch '2.3.x' into 2.4.x

Closes gh-26276

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

 /*
- * Copyright 2019-2020 the original author or authors.
+ * Copyright 2019-2021 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.artifacts.Configuration;
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.Sync;
 import org.gradle.api.tasks.TaskAction;
 
@@ -136,7 +137,8 @@ class AsciidoctorConventions {
 		syncDocumentationSource.setDestinationDir(syncedSource);
 		syncDocumentationSource.from("src/docs/");
 		asciidoctorTask.dependsOn(syncDocumentationSource);
-		asciidoctorTask.getInputs().dir(syncedSource);
+		asciidoctorTask.getInputs().dir(syncedSource).withPathSensitivity(PathSensitivity.RELATIVE)
+				.withPropertyName("synced source");
 		asciidoctorTask.setSourceDir(project.relativePath(new File(syncedSource, "asciidoc/")));
 		return syncDocumentationSource;
 	}

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

@@ -31,6 +31,7 @@ import java.util.concurrent.Callable;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Task;
 import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.TaskAction;
 
@@ -52,8 +53,10 @@ public class AutoConfigurationMetadata extends DefaultTask {
 	private File outputFile;
 
 	public AutoConfigurationMetadata() {
-		getInputs().file((Callable<File>) () -> new File(this.sourceSet.getOutput().getResourcesDir(),
-				"META-INF/spring.factories"));
+		getInputs()
+				.file((Callable<File>) () -> new File(this.sourceSet.getOutput().getResourcesDir(),
+						"META-INF/spring.factories"))
+				.withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("spring.factories");
 		dependsOn((Callable<String>) () -> this.sourceSet.getProcessResourcesTaskName());
 		getProject().getConfigurations()
 				.maybeCreate(AutoConfigurationPlugin.AUTO_CONFIGURATION_METADATA_CONFIGURATION_NAME);

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

 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -27,6 +27,7 @@ import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginConvention;
+import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.compile.JavaCompile;
 
@@ -87,7 +88,8 @@ public class ConfigurationPropertiesPlugin implements Plugin<Project> {
 	private void configureAdditionalMetadataLocationsCompilerArgument(Project project) {
 		JavaCompile compileJava = project.getTasks().withType(JavaCompile.class)
 				.getByName(JavaPlugin.COMPILE_JAVA_TASK_NAME);
-		((Task) compileJava).getInputs().files(project.getTasks().getByName(JavaPlugin.PROCESS_RESOURCES_TASK_NAME));
+		((Task) compileJava).getInputs().files(project.getTasks().getByName(JavaPlugin.PROCESS_RESOURCES_TASK_NAME))
+				.withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("processed resources");
 		SourceSet mainSourceSet = project.getConvention().getPlugin(JavaPluginConvention.class).getSourceSets()
 				.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
 		compileJava.getOptions().getCompilerArgs()

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

 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -51,7 +51,8 @@ public class MavenExec extends JavaExec {
 
 	public void setProjectDir(File projectDir) {
 		this.projectDir = projectDir;
-		getInputs().file(new File(projectDir, "pom.xml")).withPathSensitivity(PathSensitivity.RELATIVE);
+		getInputs().file(new File(projectDir, "pom.xml")).withPathSensitivity(PathSensitivity.RELATIVE)
+				.withPropertyName("pom");
 	}
 
 	@Override

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

 /*
- * Copyright 2019-2020 the original author or authors.
+ * Copyright 2019-2021 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.
@@ -50,6 +50,7 @@ import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.Copy;
 import org.gradle.api.tasks.JavaExec;
 import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.tasks.TaskAction;
@@ -211,7 +212,8 @@ public class MavenPluginPlugin implements Plugin<Project> {
 		MavenExec generatePluginDescriptor = project.getTasks().create("generatePluginDescriptor", MavenExec.class);
 		generatePluginDescriptor.args("org.apache.maven.plugins:maven-plugin-plugin:3.6.0:descriptor");
 		generatePluginDescriptor.getOutputs().dir(new File(mavenDir, "target/classes/META-INF/maven"));
-		generatePluginDescriptor.getInputs().dir(new File(mavenDir, "target/classes/org"));
+		generatePluginDescriptor.getInputs().dir(new File(mavenDir, "target/classes/org"))
+				.withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("plugin classes");
 		generatePluginDescriptor.setProjectDir(mavenDir);
 		return generatePluginDescriptor;
 	}
@@ -243,7 +245,8 @@ public class MavenPluginPlugin implements Plugin<Project> {
 
 		void setGenerator(Task generator) {
 			this.generator = generator;
-			getInputs().files(this.generator);
+			getInputs().files(this.generator).withPathSensitivity(PathSensitivity.RELATIVE)
+					.withPropertyName("generated source");
 		}
 
 		@OutputDirectory

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

 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -64,9 +64,9 @@ public class TestSliceMetadata extends DefaultTask {
 
 	public TestSliceMetadata() {
 		getInputs().dir((Callable<File>) () -> this.sourceSet.getOutput().getResourcesDir())
-				.withPathSensitivity(PathSensitivity.RELATIVE);
+				.withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("resources");
 		getInputs().files((Callable<FileCollection>) () -> this.sourceSet.getOutput().getClassesDirs())
-				.withPathSensitivity(PathSensitivity.RELATIVE);
+				.withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("classes");
 	}
 
 	public void setSourceSet(SourceSet sourceSet) {