Package META-INF/services/ files beneath BOOT-INF/classes/

Closes gh-30413

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/tasks/bundling/BootJar.java

@@ -110,7 +110,8 @@ public class BootJar extends Jar implements BootArchive {
 	private void moveMetaInfToRoot(CopySpec spec) {
 		spec.eachFile((file) -> {
 			String path = file.getRelativeSourcePath().getPathString();
-			if (path.startsWith("META-INF/") && !path.equals("META-INF/aop.xml") && !path.endsWith(".kotlin_module")) {
+			if (path.startsWith("META-INF/") && !path.equals("META-INF/aop.xml") && !path.endsWith(".kotlin_module")
+					&& !path.startsWith("META-INF/services/")) {
 				this.support.moveToRoot(file);
 			}
 		});

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/BootJarTests.java

@@ -163,6 +163,27 @@ class BootJarTests extends AbstractBootArchiveTests<BootJar> {
 		}
 	}
 
+	@Test
+	void metaInfServicesEntryIsPackagedBeneathClassesDirectory() throws IOException {
+		getTask().getMainClass().set("com.example.Main");
+		File classpathDirectory = new File(this.temp, "classes");
+		File service = new File(classpathDirectory, "META-INF/services/com.example.Service");
+		service.getParentFile().mkdirs();
+		service.createNewFile();
+		File applicationClass = new File(classpathDirectory, "com/example/Application.class");
+		applicationClass.getParentFile().mkdirs();
+		applicationClass.createNewFile();
+		getTask().classpath(classpathDirectory);
+		executeTask();
+		try (JarFile jarFile = new JarFile(getTask().getArchiveFile().get().getAsFile())) {
+			assertThat(jarFile.getEntry("BOOT-INF/classes/com/example/Application.class")).isNotNull();
+			assertThat(jarFile.getEntry("com/example/Application.class")).isNull();
+			assertThat(jarFile.getEntry("BOOT-INF/classes/META-INF/services/com.example.Service")).isNotNull();
+			assertThat(jarFile.getEntry("META-INF/services/com.example.Service")).isNull();
+		}
+
+	}
+
 	private File createPopulatedJar() throws IOException {
 		addContent();
 		executeTask();

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Packager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -446,7 +446,8 @@ public abstract class Packager {
 		private boolean isTransformable(JarArchiveEntry entry) {
 			String name = entry.getName();
 			if (name.startsWith("META-INF/")) {
-				return name.equals("META-INF/aop.xml") || name.endsWith(".kotlin_module");
+				return name.equals("META-INF/aop.xml") || name.endsWith(".kotlin_module")
+						|| name.startsWith("META-INF/services/");
 			}
 			return !name.startsWith("BOOT-INF/") && !name.equals("module-info.class");
 		}

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/AbstractPackagerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -484,6 +484,18 @@ abstract class AbstractPackagerTests<P extends Packager> {
 		assertThat(getPackagedEntry("BOOT-INF/classes/META-INF/aop.xml")).isNotNull();
 	}
 
+	@Test
+	void metaInfServicesFilesAreMovedBeneathBootInfClassesWhenRepackaged() throws Exception {
+		this.testJarFile.addClass("A.class", ClassWithMainMethod.class);
+		File service = new File(this.tempDir, "com.example.Service");
+		service.createNewFile();
+		this.testJarFile.addFile("META-INF/services/com.example.Service", service);
+		P packager = createPackager();
+		execute(packager, NO_LIBRARIES);
+		assertThat(getPackagedEntry("META-INF/services/com.example.Service")).isNull();
+		assertThat(getPackagedEntry("BOOT-INF/classes/META-INF/services/com.example.Service")).isNotNull();
+	}
+
 	@Test
 	void allEntriesUseUnixPlatformAndUtf8NameEncoding() throws IOException {
 		this.testJarFile.addClass("A.class", ClassWithMainMethod.class);