Merge branch '3.3.x'

Closes gh-41662

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/dockerTest/java/org/springframework/boot/maven/BuildImageTests.java

@@ -99,7 +99,7 @@ void whenBuildImageIsInvokedOnTheCommandLineWithoutRepackageTheArchiveIsRepackag
 	}
 
 	@TestTemplate
-	void whenBuildImageIsInvokedWithClassifierWithoutRepackageTheArchiveIsRepackagedOnTheFly(MavenBuild mavenBuild) {
+	void whenPackageIsInvokedWithClassifierTheOriginalArchiveIsFound(MavenBuild mavenBuild) {
 		mavenBuild.project("dockerTest", "build-image-classifier")
 			.goals("package")
 			.systemProperty("spring-boot.build-image.pullPolicy", "IF_NOT_PRESENT")
@@ -118,6 +118,26 @@ void whenBuildImageIsInvokedWithClassifierWithoutRepackageTheArchiveIsRepackaged
 			});
 	}
 
+	@TestTemplate
+	void whenBuildImageIsInvokedWithClassifierAndRepackageTheOriginalArchiveIsFound(MavenBuild mavenBuild) {
+		mavenBuild.project("dockerTest", "build-image-fork-classifier")
+			.goals("spring-boot:build-image")
+			.systemProperty("spring-boot.build-image.pullPolicy", "IF_NOT_PRESENT")
+			.prepare(this::writeLongNameResource)
+			.execute((project) -> {
+				File jar = new File(project, "target/build-image-fork-classifier-0.0.1.BUILD-SNAPSHOT.jar");
+				assertThat(jar).isFile();
+				File classifier = new File(project, "target/build-image-fork-classifier-0.0.1.BUILD-SNAPSHOT-exec.jar");
+				assertThat(classifier).exists();
+				assertThat(buildLog(project)).contains("Building image")
+					.contains("docker.io/library/build-image-fork-classifier:0.0.1.BUILD-SNAPSHOT")
+					.contains("---> Test Info buildpack building")
+					.contains("---> Test Info buildpack done")
+					.contains("Successfully built image");
+				removeImage("build-image-fork-classifier", "0.0.1.BUILD-SNAPSHOT");
+			});
+	}
+
 	@TestTemplate
 	void whenBuildImageIsInvokedWithClassifierSourceWithoutRepackageTheArchiveIsRepackagedOnTheFly(
 			MavenBuild mavenBuild) {

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/dockerTest/projects/build-image-fork-classifier/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>org.springframework.boot.maven.it</groupId>
+	<artifactId>build-image-fork-classifier</artifactId>
+	<version>0.0.1.BUILD-SNAPSHOT</version>
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<maven.compiler.source>@java.version@</maven.compiler.source>
+		<maven.compiler.target>@java.version@</maven.compiler.target>
+	</properties>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>@project.groupId@</groupId>
+				<artifactId>@project.artifactId@</artifactId>
+				<version>@project.version@</version>
+				<executions>
+					<execution>
+						<id>repackage</id>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<classifier>exec</classifier>
+					<image>
+						<builder>ghcr.io/spring-io/spring-boot-cnb-test-builder:0.0.1</builder>
+					</image>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+</project>

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/dockerTest/projects/build-image-fork-classifier/src/main/java/org/test/SampleApplication.java

@@ -0,0 +1,28 @@
+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.test;
+
+public class SampleApplication {
+
+	public static void main(String[] args) throws Exception {
+		System.out.println("Launched");
+		synchronized(args) {
+			args.wait(); // Prevent exit"
+		}
+	}
+
+}

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/BuildImageMojo.java

@@ -319,8 +319,8 @@ private TarArchive getApplicationContent(Owner owner, Libraries libraries, Image
 	}
 
 	private File getArchiveFile() {
-		// We can use 'project.getArtifact().getFile()' because that was done in a
-		// forked lifecycle and is now null
+		// We can't use 'project.getArtifact().getFile()' because package can be done in a
+		// forked lifecycle and will be null
 		File archiveFile = getTargetFile(this.finalName, this.classifier, this.sourceDirectory);
 		if (!archiveFile.exists()) {
 			archiveFile = getSourceArtifact(this.classifier).getFile();
@@ -336,9 +336,17 @@ private File getArchiveFile() {
 	 * @return the file to use to back up the original source
 	 */
 	private File getBackupFile() {
-		Artifact source = getSourceArtifact(null);
-		if (this.classifier != null && !this.classifier.equals(source.getClassifier())) {
-			return source.getFile();
+		// We can't use 'project.getAttachedArtifacts()' because package can be done in a
+		// forked lifecycle and will be null
+		if (this.classifier != null) {
+			File backupFile = getTargetFile(this.finalName, null, this.sourceDirectory);
+			if (backupFile.exists()) {
+				return backupFile;
+			}
+			Artifact source = getSourceArtifact(null);
+			if (!this.classifier.equals(source.getClassifier())) {
+				return source.getFile();
+			}
 		}
 		return null;
 	}