Add Spring-Boot-* manifest attributes to jars and wars built with Gradle

Closes gh-16068

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

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -73,10 +73,20 @@ class BootArchiveSupport {
 		configureExclusions();
 	}
 
-	void configureManifest(Jar jar, String mainClassName) {
+	void configureManifest(Jar jar, String mainClassName, String springBootClasses,
+			String springBootLib) {
 		Attributes attributes = jar.getManifest().getAttributes();
 		attributes.putIfAbsent("Main-Class", this.loaderMainClass);
 		attributes.putIfAbsent("Start-Class", mainClassName);
+		attributes.computeIfAbsent("Spring-Boot-Version",
+				(key) -> determineSpringBootVersion());
+		attributes.putIfAbsent("Spring-Boot-Classes", springBootClasses);
+		attributes.putIfAbsent("Spring-Boot-Lib", springBootLib);
+	}
+
+	private String determineSpringBootVersion() {
+		String implementationVersion = getClass().getPackage().getImplementationVersion();
+		return (implementationVersion != null) ? implementationVersion : "unknown";
 	}
 
 	CopyAction createCopyAction(Jar jar) {

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

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -65,7 +65,8 @@ public class BootJar extends Jar implements BootArchive {
 
 	@Override
 	public void copy() {
-		this.support.configureManifest(this, getMainClassName());
+		this.support.configureManifest(this, getMainClassName(), "BOOT-INF/classes/",
+				"BOOT-INF/lib/");
 		super.copy();
 	}
 

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

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -57,7 +57,8 @@ public class BootWar extends War implements BootArchive {
 
 	@Override
 	public void copy() {
-		this.support.configureManifest(this, getMainClassName());
+		this.support.configureManifest(this, getMainClassName(), "WEB-INF/classes/",
+				"WEB-INF/lib/");
 		super.copy();
 	}
 

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

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -97,6 +97,13 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 					.isEqualTo(this.launcherClass);
 			assertThat(jarFile.getManifest().getMainAttributes().getValue("Start-Class"))
 					.isEqualTo("com.example.Main");
+			assertThat(jarFile.getManifest().getMainAttributes()
+					.getValue("Spring-Boot-Classes")).isEqualTo(this.classesPath);
+			assertThat(
+					jarFile.getManifest().getMainAttributes().getValue("Spring-Boot-Lib"))
+							.isEqualTo(this.libPath);
+			assertThat(jarFile.getManifest().getMainAttributes()
+					.getValue("Spring-Boot-Version")).isNotNull();
 		}
 	}
 
@@ -106,8 +113,8 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.classpath(this.temp.newFile("one.jar"), this.temp.newFile("two.jar"));
 		this.task.execute();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/one.jar")).isNotNull();
-			assertThat(jarFile.getEntry(this.libPath + "/two.jar")).isNotNull();
+			assertThat(jarFile.getEntry(this.libPath + "one.jar")).isNotNull();
+			assertThat(jarFile.getEntry(this.libPath + "two.jar")).isNotNull();
 		}
 	}
 
@@ -123,7 +130,7 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.execute();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
 			assertThat(
-					jarFile.getEntry(this.classesPath + "/com/example/Application.class"))
+					jarFile.getEntry(this.classesPath + "com/example/Application.class"))
 							.isNotNull();
 		}
 	}
@@ -136,8 +143,8 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 				.setClasspath(this.task.getProject().files(this.temp.newFile("two.jar")));
 		this.task.execute();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/one.jar")).isNull();
-			assertThat(jarFile.getEntry(this.libPath + "/two.jar")).isNotNull();
+			assertThat(jarFile.getEntry(this.libPath + "one.jar")).isNull();
+			assertThat(jarFile.getEntry(this.libPath + "two.jar")).isNotNull();
 		}
 	}
 
@@ -148,8 +155,8 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.setClasspath(this.temp.newFile("two.jar"));
 		this.task.execute();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/one.jar")).isNull();
-			assertThat(jarFile.getEntry(this.libPath + "/two.jar")).isNotNull();
+			assertThat(jarFile.getEntry(this.libPath + "one.jar")).isNull();
+			assertThat(jarFile.getEntry(this.libPath + "two.jar")).isNotNull();
 		}
 	}
 
@@ -187,9 +194,9 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.requiresUnpack("**/one.jar");
 		this.task.execute();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/one.jar").getComment())
+			assertThat(jarFile.getEntry(this.libPath + "one.jar").getComment())
 					.startsWith("UNPACK:");
-			assertThat(jarFile.getEntry(this.libPath + "/two.jar").getComment()).isNull();
+			assertThat(jarFile.getEntry(this.libPath + "two.jar").getComment()).isNull();
 		}
 	}
 
@@ -200,9 +207,9 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.requiresUnpack((element) -> element.getName().endsWith("two.jar"));
 		this.task.execute();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/two.jar").getComment())
+			assertThat(jarFile.getEntry(this.libPath + "two.jar").getComment())
 					.startsWith("UNPACK:");
-			assertThat(jarFile.getEntry(this.libPath + "/one.jar").getComment()).isNull();
+			assertThat(jarFile.getEntry(this.libPath + "one.jar").getComment()).isNull();
 		}
 	}
 
@@ -322,7 +329,7 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.execute();
 		assertThat(this.task.getArchivePath()).exists();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/spring-boot-devtools-0.1.2.jar"))
+			assertThat(jarFile.getEntry(this.libPath + "spring-boot-devtools-0.1.2.jar"))
 					.isNull();
 		}
 	}
@@ -335,7 +342,7 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.execute();
 		assertThat(this.task.getArchivePath()).exists();
 		try (JarFile jarFile = new JarFile(this.task.getArchivePath())) {
-			assertThat(jarFile.getEntry(this.libPath + "/spring-boot-devtools-0.1.2.jar"))
+			assertThat(jarFile.getEntry(this.libPath + "spring-boot-devtools-0.1.2.jar"))
 					.isNotNull();
 		}
 	}
@@ -377,9 +384,9 @@ public abstract class AbstractBootArchiveTests<T extends Jar & BootArchive> {
 		this.task.execute();
 		assertThat(getEntryNames(this.task.getArchivePath())).containsSubsequence(
 				"org/springframework/boot/loader/",
-				this.classesPath + "/com/example/Application.class",
-				this.libPath + "/first-library.jar", this.libPath + "/second-library.jar",
-				this.libPath + "/third-library.jar");
+				this.classesPath + "com/example/Application.class",
+				this.libPath + "first-library.jar", this.libPath + "second-library.jar",
+				this.libPath + "third-library.jar");
 	}
 
 	private T configure(T task) throws IOException {

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

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -33,7 +33,7 @@ public class BootJarTests extends AbstractBootArchiveTests<BootJar> {
 
 	public BootJarTests() {
 		super(BootJar.class, "org.springframework.boot.loader.JarLauncher",
-				"BOOT-INF/lib", "BOOT-INF/classes");
+				"BOOT-INF/lib/", "BOOT-INF/classes/");
 	}
 
 	@Test

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

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -32,8 +32,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 public class BootWarTests extends AbstractBootArchiveTests<BootWar> {
 
 	public BootWarTests() {
-		super(BootWar.class, "org.springframework.boot.loader.WarLauncher", "WEB-INF/lib",
-				"WEB-INF/classes");
+		super(BootWar.class, "org.springframework.boot.loader.WarLauncher",
+				"WEB-INF/lib/", "WEB-INF/classes/");
 	}
 
 	@Test