Set implementation name and version in Gradle-built archives

Closes gh-34059

Author: wilkinsona

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -54,6 +54,8 @@ class BootArchiveSupport {
 
 	private static final byte[] ZIP_FILE_HEADER = new byte[] { 'P', 'K', 3, 4 };
 
+	private static final String UNSPECIFIED_VERSION = "unspecified";
+
 	private static final Set<String> DEFAULT_LAUNCHER_CLASSES;
 
 	static {
@@ -85,7 +87,7 @@ class BootArchiveSupport {
 	}
 
 	void configureManifest(Manifest manifest, String mainClass, String classes, String lib, String classPathIndex,
-			String layersIndex, String jdkVersion) {
+			String layersIndex, String jdkVersion, String implementationName, Object implementationVersion) {
 		Attributes attributes = manifest.getAttributes();
 		attributes.putIfAbsent("Main-Class", this.loaderMainClass);
 		attributes.putIfAbsent("Start-Class", mainClass);
@@ -99,6 +101,13 @@ void configureManifest(Manifest manifest, String mainClass, String classes, Stri
 			attributes.putIfAbsent("Spring-Boot-Layers-Index", layersIndex);
 		}
 		attributes.putIfAbsent("Build-Jdk-Spec", jdkVersion);
+		attributes.putIfAbsent("Implementation-Name", implementationName);
+		if (implementationVersion != null) {
+			String versionString = implementationVersion.toString();
+			if (!UNSPECIFIED_VERSION.equals(versionString)) {
+				attributes.putIfAbsent("Implementation-Version", versionString);
+			}
+		}
 	}
 
 	private String determineSpringBootVersion() {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -29,6 +29,7 @@
 import org.gradle.api.file.FileCopyDetails;
 import org.gradle.api.file.FileTreeElement;
 import org.gradle.api.internal.file.copy.CopyAction;
+import org.gradle.api.provider.Provider;
 import org.gradle.api.specs.Spec;
 import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.Nested;
@@ -65,6 +66,10 @@ public abstract class BootJar extends Jar implements BootArchive {
 
 	private final LayeredSpec layered;
 
+	private final Provider<String> projectName;
+
+	private final Provider<Object> projectVersion;
+
 	private FileCollection classpath;
 
 	/**
@@ -85,6 +90,8 @@ public BootJar() {
 				}
 			});
 		});
+		this.projectName = project.provider(project::getName);
+		this.projectVersion = project.provider(project::getVersion);
 	}
 
 	private void configureBootInfSpec(CopySpec bootInfSpec) {
@@ -120,7 +127,7 @@ private void moveMetaInfToRoot(CopySpec spec) {
 	public void copy() {
 		this.support.configureManifest(getManifest(), getMainClass().get(), CLASSES_DIRECTORY, LIB_DIRECTORY,
 				CLASSPATH_INDEX, (isLayeredDisabled()) ? null : LAYERS_INDEX,
-				this.getTargetJavaVersion().get().getMajorVersion());
+				this.getTargetJavaVersion().get().getMajorVersion(), this.projectName.get(), this.projectVersion.get());
 		super.copy();
 	}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -28,6 +28,7 @@
 import org.gradle.api.file.FileCopyDetails;
 import org.gradle.api.file.FileTreeElement;
 import org.gradle.api.internal.file.copy.CopyAction;
+import org.gradle.api.provider.Provider;
 import org.gradle.api.specs.Spec;
 import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.Internal;
@@ -65,6 +66,10 @@ public abstract class BootWar extends War implements BootArchive {
 
 	private final LayeredSpec layered;
 
+	private final Provider<String> projectName;
+
+	private final Provider<Object> projectVersion;
+
 	private FileCollection providedClasspath;
 
 	/**
@@ -85,6 +90,8 @@ public BootWar() {
 				}
 			});
 		});
+		this.projectName = project.provider(project::getName);
+		this.projectVersion = project.provider(project::getVersion);
 	}
 
 	private Object getProvidedLibFiles() {
@@ -95,7 +102,7 @@ private Object getProvidedLibFiles() {
 	public void copy() {
 		this.support.configureManifest(getManifest(), getMainClass().get(), CLASSES_DIRECTORY, LIB_DIRECTORY,
 				CLASSPATH_INDEX, (isLayeredDisabled()) ? null : LAYERS_INDEX,
-				this.getTargetJavaVersion().get().getMajorVersion());
+				this.getTargetJavaVersion().get().getMajorVersion(), this.projectName.get(), this.projectVersion.get());
 		super.copy();
 	}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -132,6 +132,42 @@ void basicArchiveCreation() throws IOException {
 					.isEqualTo(this.classesPath);
 			assertThat(jarFile.getManifest().getMainAttributes().getValue("Spring-Boot-Lib")).isEqualTo(this.libPath);
 			assertThat(jarFile.getManifest().getMainAttributes().getValue("Spring-Boot-Version")).isNotNull();
+			assertThat(jarFile.getManifest().getMainAttributes().getValue("Implementation-Name"))
+					.isEqualTo(this.project.getName());
+			assertThat(jarFile.getManifest().getMainAttributes().getValue("Implementation-Version")).isNull();
+		}
+	}
+
+	@Test
+	void whenImplementationNameIsCustomizedItShouldAppearInArchiveManifest() throws IOException {
+		this.task.getMainClass().set("com.example.Main");
+		this.task.getManifest().getAttributes().put("Implementation-Name", "Customized");
+		executeTask();
+		try (JarFile jarFile = new JarFile(this.task.getArchiveFile().get().getAsFile())) {
+			assertThat(jarFile.getManifest().getMainAttributes().getValue("Implementation-Name"))
+					.isEqualTo("Customized");
+		}
+	}
+
+	@Test
+	void whenProjectVersionIsSetThenImplementationVersionShouldAppearInArchiveManifest() throws IOException {
+		this.project.setVersion("1.0.0");
+		this.task.getMainClass().set("com.example.Main");
+		executeTask();
+		try (JarFile jarFile = new JarFile(this.task.getArchiveFile().get().getAsFile())) {
+			assertThat(jarFile.getManifest().getMainAttributes().getValue("Implementation-Version")).isEqualTo("1.0.0");
+		}
+	}
+
+	@Test
+	void whenImplementationVersionIsCustomizedItShouldAppearInArchiveManifest() throws IOException {
+		this.project.setVersion("1.0.0");
+		this.task.getMainClass().set("com.example.Main");
+		this.task.getManifest().getAttributes().put("Implementation-Version", "Customized");
+		executeTask();
+		try (JarFile jarFile = new JarFile(this.task.getArchiveFile().get().getAsFile())) {
+			assertThat(jarFile.getManifest().getMainAttributes().getValue("Implementation-Version"))
+					.isEqualTo("Customized");
 		}
 	}