Add support for building OCI images using the Gradle plugin

Closes gh-19831

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/io/ZipFileTarArchive.java

@@ -35,8 +35,9 @@ import org.springframework.util.StreamUtils;
  * Adapter class to convert a ZIP file to a {@link TarArchive}.
  *
  * @author Phillip Webb
+ * @since 2.3.0
  */
-class ZipFileTarArchive implements TarArchive {
+public class ZipFileTarArchive implements TarArchive {
 
 	static final long NORMALIZED_MOD_TIME = TarArchive.NORMALIZED_TIME.toEpochMilli();
 
@@ -44,7 +45,13 @@ class ZipFileTarArchive implements TarArchive {
 
 	private final Owner owner;
 
-	ZipFileTarArchive(File zip, Owner owner) {
+	/**
+	 * Creates an archive from the contents of the given {@code zip}. Each entry in the
+	 * archive will be owned by the given {@code owner}.
+	 * @param zip the zip to use as a source
+	 * @param owner the owner of the tar entries
+	 */
+	public ZipFileTarArchive(File zip, Owner owner) {
 		Assert.notNull(zip, "Zip must not be null");
 		Assert.notNull(owner, "Owner must not be null");
 		this.zip = zip;

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/build.gradle

@@ -30,6 +30,7 @@ dependencies {
 
 	asciidoctorExtensions("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.3.0.RELEASE")
 
+	implementation(project(":spring-boot-project:spring-boot-tools:spring-boot-buildpack-platform"))
 	implementation(project(":spring-boot-project:spring-boot-tools:spring-boot-loader-tools"))
 	implementation("io.spring.gradle:dependency-management-plugin")
 	implementation("org.apache.commons:commons-compress")
@@ -38,9 +39,11 @@ dependencies {
 	optional(platform(project(":spring-boot-project:spring-boot-dependencies")))
 	optional("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.50")
 
-	testImplementation("org.junit.jupiter:junit-jupiter")
+	testImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-test-support"))
 	testImplementation("org.assertj:assertj-core")
+	testImplementation("org.junit.jupiter:junit-jupiter")
 	testImplementation("org.mockito:mockito-core")
+	testImplementation("org.testcontainers:testcontainers")
 }
 
 gradlePlugin {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/docs/asciidoc/index.adoc

@@ -26,6 +26,7 @@ Andy Wilkinson
 :api-documentation: {spring-boot-docs}/gradle-plugin/api
 :spring-boot-reference: {spring-boot-docs}/reference/htmlsingle
 :build-info-javadoc: {api-documentation}/org/springframework/boot/gradle/tasks/buildinfo/BuildInfo.html
+:boot-build-image-javadoc: {api-documentation}/org/springframework/boot/gradle/tasks/bundling/BootBuildImage.html
 :boot-jar-javadoc: {api-documentation}/org/springframework/boot/gradle/tasks/bundling/BootJar.html
 :boot-war-javadoc: {api-documentation}/org/springframework/boot/gradle/tasks/bundling/BootWar.html
 :boot-run-javadoc: {api-documentation}/org/springframework/boot/gradle/tasks/run/BootRun.html

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/docs/asciidoc/packaging.adoc

@@ -298,3 +298,12 @@ The jar will then be split into layer folders which may include:
 * `resources`
 * `snapshots-dependencies`
 * `dependencies`
+
+
+
+[[packaging-oci-images]]
+== Packaging OCI images
+
+The plugin can create OCI images from executable jars using a https://buildpacks.io[buildpack].
+Images can be built using the `bootBuildImage` task and a local Docker installation.
+The task is automatically created when the `java` plugin is applied and is an instance of {boot-build-image-javadoc}[`BootBuildImage`].

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/docs/asciidoc/reacting.adoc

@@ -15,10 +15,11 @@ When Gradle's {java-plugin}[`java` plugin] is applied to a project, the Spring B
    The jar will contain everything on the runtime classpath of the main source set; classes are packaged in `BOOT-INF/classes` and jars are packaged in `BOOT-INF/lib`
 2. Configures the `assemble` task to depend on the `bootJar` task.
 3. Disables the `jar` task.
-4. Creates a {boot-run-javadoc}[`BootRun`] task named `bootRun` that can be used to run your application.
-5. Creates a configuration named `bootArchives` that contains the artifact produced by the `bootJar` task.
-6. Configures any `JavaCompile` tasks with no configured encoding to use `UTF-8`.
-7. Configures any `JavaCompile` tasks to use the `-parameters` compiler argument.
+4. Creates a {boot-build-image-javadoc}[`BootBuildImage`] task named `bootBuildImage` that will create a OCI image using a https://buildpacks.io[buildpack].
+5. Creates a {boot-run-javadoc}[`BootRun`] task named `bootRun` that can be used to run your application.
+6. Creates a configuration named `bootArchives` that contains the artifact produced by the `bootJar` task.
+7. Configures any `JavaCompile` tasks with no configured encoding to use `UTF-8`.
+8. Configures any `JavaCompile` tasks to use the `-parameters` compiler argument.
 
 
 

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/JavaPluginAction.java

@@ -36,6 +36,7 @@ import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.compile.JavaCompile;
 
+import org.springframework.boot.gradle.tasks.bundling.BootBuildImage;
 import org.springframework.boot.gradle.tasks.bundling.BootJar;
 import org.springframework.boot.gradle.tasks.run.BootRun;
 import org.springframework.util.StringUtils;
@@ -65,6 +66,7 @@ final class JavaPluginAction implements PluginApplicationAction {
 		disableJarTask(project);
 		configureBuildTask(project);
 		BootJar bootJar = configureBootJarTask(project);
+		configureBootBuildImageTask(project, bootJar);
 		configureArtifactPublication(bootJar);
 		configureBootRunTask(project);
 		configureUtf8Encoding(project);
@@ -94,6 +96,14 @@ final class JavaPluginAction implements PluginApplicationAction {
 		return bootJar;
 	}
 
+	private void configureBootBuildImageTask(Project project, BootJar bootJar) {
+		BootBuildImage buildImage = project.getTasks().create(SpringBootPlugin.BOOT_BUILD_IMAGE_TASK_NAME,
+				BootBuildImage.class);
+		buildImage.setDescription("Builds an OCI image of the application using the output of the bootJar task");
+		buildImage.setGroup(BasePlugin.BUILD_GROUP);
+		buildImage.from(bootJar);
+	}
+
 	private void configureArtifactPublication(BootJar bootJar) {
 		ArchivePublishArtifact artifact = new ArchivePublishArtifact(bootJar);
 		this.singlePublishedArtifact.addCandidate(artifact);

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/SpringBootPlugin.java

@@ -34,6 +34,7 @@ import org.gradle.api.artifacts.ResolvableDependencies;
 import org.gradle.util.GradleVersion;
 
 import org.springframework.boot.gradle.dsl.SpringBootExtension;
+import org.springframework.boot.gradle.tasks.bundling.BootBuildImage;
 import org.springframework.boot.gradle.tasks.bundling.BootJar;
 import org.springframework.boot.gradle.tasks.bundling.BootWar;
 
@@ -68,6 +69,12 @@ public class SpringBootPlugin implements Plugin<Project> {
 	 */
 	public static final String BOOT_WAR_TASK_NAME = "bootWar";
 
+	/**
+	 * The name of the default {@link BootBuildImage} task.
+	 * @since 2.3.0
+	 */
+	public static final String BOOT_BUILD_IMAGE_TASK_NAME = "bootBuildImage";
+
 	/**
 	 * The coordinates {@code (group:name:version)} of the
 	 * {@code spring-boot-dependencies} bom.

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

+/*
+ * Copyright 2012-2020 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.springframework.boot.gradle.tasks.bundling;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Supplier;
+
+import org.gradle.api.DefaultTask;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.TaskAction;
+
+import org.springframework.boot.buildpack.platform.build.BuildRequest;
+import org.springframework.boot.buildpack.platform.build.Builder;
+import org.springframework.boot.buildpack.platform.docker.DockerException;
+import org.springframework.boot.buildpack.platform.docker.type.ImageName;
+import org.springframework.boot.buildpack.platform.docker.type.ImageReference;
+import org.springframework.boot.buildpack.platform.io.ZipFileTarArchive;
+import org.springframework.util.StringUtils;
+
+/**
+ * A {@link Task} for bundling an application into an OCI image using a
+ * <a href="https://buildpacks.io">buildpack</a>.
+ *
+ * @author Andy Wilkinson
+ * @since 2.3.0
+ */
+public class BootBuildImage extends DefaultTask {
+
+	private Supplier<File> jar;
+
+	private String imageName;
+
+	private String builder;
+
+	private Map<String, String> environment = new HashMap<String, String>();
+
+	private boolean cleanCache;
+
+	private boolean verboseLogging;
+
+	/**
+	 * Configures this task to create an image from the given {@code bootJar} task. This
+	 * task is also configured to depend upon the given task.
+	 * @param bootJar the fat jar from which the image should be created.
+	 */
+	public void from(BootJar bootJar) {
+		dependsOn(bootJar);
+		this.jar = () -> bootJar.getArchiveFile().get().getAsFile();
+	}
+
+	/**
+	 * Configures this task to create an image from the given jar file.
+	 * @param jar the jar from which the image should be created.
+	 */
+	public void from(File jar) {
+		this.jar = () -> jar;
+	}
+
+	/**
+	 * Returns the name of the image that will be built. When {@code null}, the name will
+	 * be derived from the {@link Project Project's} {@link Project#getName() name} and
+	 * {@link Project#getVersion version}.
+	 * @return name of the image
+	 */
+	@Input
+	@Optional
+	public String getImageName() {
+		return this.imageName;
+	}
+
+	/**
+	 * Sets the name of the image that will be built.
+	 * @param imageName name of the image
+	 */
+	public void setImageName(String imageName) {
+		this.imageName = imageName;
+	}
+
+	/**
+	 * Returns the builder that will be used to build the image. When {@code null}, the
+	 * default builder will be used.
+	 * @return the builder
+	 */
+	@Input
+	@Optional
+	public String getBuilder() {
+		return this.builder;
+	}
+
+	/**
+	 * Sets the builder that will be used to build the image.
+	 * @param builder the builder
+	 */
+	public void setBuilder(String builder) {
+		this.builder = builder;
+	}
+
+	/**
+	 * Returns the environment that will be used when building the image.
+	 * @return the environment
+	 */
+	@Input
+	public Map<String, String> getEnvironment() {
+		return this.environment;
+	}
+
+	/**
+	 * Sets the environment that will be used when building the image.
+	 * @param environment the environment
+	 */
+	public void setEnvironment(Map<String, String> environment) {
+		this.environment = environment;
+	}
+
+	/**
+	 * Add an entry to the environment that will be used when building the image.
+	 * @param name the name of the entry
+	 * @param value the value of the entry
+	 */
+	public void environment(String name, String value) {
+		this.environment.put(name, value);
+	}
+
+	/**
+	 * Adds entries to the environment that will be used when building the image.
+	 * @param entries the entries to add to the environment
+	 */
+	public void environment(Map<String, String> entries) {
+		this.environment.putAll(entries);
+	}
+
+	/**
+	 * Returns whether caches should be cleaned before packaging.
+	 * @return whether caches should be cleaned
+	 */
+	@Input
+	public boolean isCleanCache() {
+		return this.cleanCache;
+	}
+
+	/**
+	 * Sets whether caches should be cleaned before packaging.
+	 * @param cleanCache {@code true} to clean the cache, otherwise {@code false}.
+	 */
+	public void setCleanCache(boolean cleanCache) {
+		this.cleanCache = cleanCache;
+	}
+
+	/**
+	 * Whether verbose logging should be enabled while building the image.
+	 * @return whether verbose logging should be enabled
+	 */
+	@Input
+	public boolean isVerboseLogging() {
+		return this.verboseLogging;
+	}
+
+	/**
+	 * Sets whether verbose logging should be enabled while building the image.
+	 * @param verboseLogging {@code true} to enable verbose logging, otherwise
+	 * {@code false}.
+	 */
+	public void setVerboseLogging(boolean verboseLogging) {
+		this.verboseLogging = verboseLogging;
+	}
+
+	@TaskAction
+	void buildImage() throws DockerException, IOException {
+		Builder builder = new Builder();
+		BuildRequest request = createRequest();
+		builder.build(request);
+	}
+
+	BuildRequest createRequest() {
+		BuildRequest request = customize(
+				BuildRequest.of(determineImageReference(), (owner) -> new ZipFileTarArchive(this.jar.get(), owner)));
+		return request;
+	}
+
+	private ImageReference determineImageReference() {
+		if (StringUtils.hasText(this.imageName)) {
+			return ImageReference.of(this.imageName);
+		}
+		ImageName imageName = ImageName.of(getProject().getName());
+		String version = getProject().getVersion().toString();
+		if ("unspecified".equals(version)) {
+			return ImageReference.of(imageName);
+		}
+		return ImageReference.of(imageName, version);
+	}
+
+	private BuildRequest customize(BuildRequest request) {
+		if (StringUtils.hasText(this.builder)) {
+			request = request.withBuilder(ImageReference.of(this.builder));
+		}
+		if (this.environment != null && !this.environment.isEmpty()) {
+			request = request.withEnv(this.environment);
+		}
+		request = request.withCleanCache(this.cleanCache);
+		request = request.withVerboseLogging(this.verboseLogging);
+		return request;
+	}
+
+}

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

+/*
+ * Copyright 2012-2020 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.springframework.boot.gradle.tasks.bundling;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import org.gradle.testkit.runner.BuildResult;
+import org.gradle.testkit.runner.TaskOutcome;
+import org.junit.jupiter.api.TestTemplate;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.containers.wait.strategy.Wait;
+
+import org.springframework.boot.buildpack.platform.docker.DockerApi;
+import org.springframework.boot.buildpack.platform.docker.type.ImageName;
+import org.springframework.boot.buildpack.platform.docker.type.ImageReference;
+import org.springframework.boot.gradle.junit.GradleCompatibilityExtension;
+import org.springframework.boot.gradle.testkit.GradleBuild;
+import org.springframework.boot.testsupport.testcontainers.DisabledIfDockerUnavailable;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link BootBuildImage}.
+ *
+ * @author Andy Wilkinson
+ */
+@ExtendWith(GradleCompatibilityExtension.class)
+@DisabledIfDockerUnavailable
+class BootBuildImageIntegrationTests {
+
+	GradleBuild gradleBuild;
+
+	@TestTemplate
+	void bootBuildImageBuildsImage() throws IOException {
+		writeMainClass();
+		BuildResult result = this.gradleBuild.build("bootBuildImage");
+		assertThat(result.task(":bootBuildImage").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+		ImageReference imageReference = ImageReference.of(ImageName.of(this.gradleBuild.getProjectDir().getName()));
+		try (GenericContainer<?> container = new GenericContainer<>(imageReference.toString())) {
+			container.waitingFor(Wait.forLogMessage("Launched\\n", 1)).start();
+		}
+		finally {
+			new DockerApi().image().remove(imageReference, false);
+		}
+	}
+
+	private void writeMainClass() {
+		File examplePackage = new File(this.gradleBuild.getProjectDir(), "src/main/java/example");
+		examplePackage.mkdirs();
+		File main = new File(examplePackage, "Main.java");
+		try (PrintWriter writer = new PrintWriter(new FileWriter(main))) {
+			writer.println("package example;");
+			writer.println();
+			writer.println("import java.io.IOException;");
+			writer.println();
+			writer.println("public class Main {");
+			writer.println();
+			writer.println("    public static void main(String[] args) throws Exception {");
+			writer.println("        System.out.println(\"Launched\");");
+			writer.println("        synchronized(args) {");
+			writer.println("            args.wait(); // Prevent exit");
+			writer.println("        }");
+			writer.println("    }");
+			writer.println();
+			writer.println("}");
+		}
+		catch (IOException ex) {
+			throw new RuntimeException(ex);
+		}
+	}
+
+}

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

+/*
+ * Copyright 2012-2020 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.springframework.boot.gradle.tasks.bundling;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.gradle.api.Project;
+import org.gradle.testfixtures.ProjectBuilder;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import org.springframework.boot.buildpack.platform.build.BuildRequest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link BootBuildImage}.
+ *
+ * @author Andy Wilkinson
+ */
+class BootBuildImageTests {
+
+	@TempDir
+	File temp;
+
+	Project project;
+
+	private final BootBuildImage buildImage;
+
+	BootBuildImageTests() {
+		File projectDir = new File(this.temp, "project");
+		projectDir.mkdirs();
+		this.project = ProjectBuilder.builder().withProjectDir(projectDir).withName("build-image-test").build();
+		this.project.setDescription("Test project for BootBuildImage");
+		this.buildImage = this.project.getTasks().create("buildImage", BootBuildImage.class);
+	}
+
+	@Test
+	void whenProjectVersionIsUnspecifiedThenItIsIgnoredWhenDerivingImageName() {
+		BuildRequest request = this.buildImage.createRequest();
+		assertThat(request.getName().getDomain()).isEqualTo("docker.io");
+		assertThat(request.getName().getName()).isEqualTo("library/build-image-test");
+		assertThat(request.getName().getTag()).isEqualTo("latest");
+		assertThat(request.getName().getDigest()).isNull();
+	}
+
+	@Test
+	void whenProjectVersionIsSpecifiedThenItIsUsedInTagOfImageName() {
+		this.project.setVersion("1.2.3");
+		BuildRequest request = this.buildImage.createRequest();
+		assertThat(request.getName().getDomain()).isEqualTo("docker.io");
+		assertThat(request.getName().getName()).isEqualTo("library/build-image-test");
+		assertThat(request.getName().getTag()).isEqualTo("1.2.3");
+		assertThat(request.getName().getDigest()).isNull();
+	}
+
+	@Test
+	void whenImageNameIsSpecifiedThenItIsUsedInRequest() {
+		this.project.setVersion("1.2.3");
+		this.buildImage.setImageName("example.com/test/build-image:1.0");
+		BuildRequest request = this.buildImage.createRequest();
+		assertThat(request.getName().getDomain()).isEqualTo("example.com");
+		assertThat(request.getName().getName()).isEqualTo("test/build-image");
+		assertThat(request.getName().getTag()).isEqualTo("1.0");
+		assertThat(request.getName().getDigest()).isNull();
+	}
+
+	@Test
+	void whenIndividualEntriesAreAddedToTheEnvironmentThenTheyAreIncludedInTheRequest() {
+		this.buildImage.environment("ALPHA", "a");
+		this.buildImage.environment("BRAVO", "b");
+		assertThat(this.buildImage.createRequest().getEnv()).containsEntry("ALPHA", "a").containsEntry("BRAVO", "b")
+				.hasSize(2);
+	}
+
+	@Test
+	void whenEntriesAreAddedToTheEnvironmentThenTheyAreIncludedInTheRequest() {
+		Map<String, String> environment = new HashMap<String, String>();
+		environment.put("ALPHA", "a");
+		environment.put("BRAVO", "b");
+		this.buildImage.environment(environment);
+		assertThat(this.buildImage.createRequest().getEnv()).containsEntry("ALPHA", "a").containsEntry("BRAVO", "b")
+				.hasSize(2);
+	}
+
+	@Test
+	void whenTheEnvironmentIsSetItIsIncludedInTheRequest() {
+		Map<String, String> environment = new HashMap<String, String>();
+		environment.put("ALPHA", "a");
+		environment.put("BRAVO", "b");
+		this.buildImage.setEnvironment(environment);
+		assertThat(this.buildImage.createRequest().getEnv()).containsEntry("ALPHA", "a").containsEntry("BRAVO", "b")
+				.hasSize(2);
+	}
+
+	@Test
+	void whenTheEnvironmentIsSetItReplacesAnyExistingEntriesAndIsIncludedInTheRequest() {
+		Map<String, String> environment = new HashMap<String, String>();
+		environment.put("ALPHA", "a");
+		environment.put("BRAVO", "b");
+		this.buildImage.environment("C", "Charlie");
+		this.buildImage.setEnvironment(environment);
+		assertThat(this.buildImage.createRequest().getEnv()).containsEntry("ALPHA", "a").containsEntry("BRAVO", "b")
+				.hasSize(2);
+	}
+
+	@Test
+	void whenUsingDefaultConfigurationThenRequestHasVerboseLoggingDisabled() {
+		assertThat(this.buildImage.createRequest().isVerboseLogging()).isFalse();
+	}
+
+	@Test
+	void whenVerboseLoggingIsEnabledThenRequestHasVerboseLoggingEnabled() {
+		this.buildImage.setVerboseLogging(true);
+		assertThat(this.buildImage.createRequest().isVerboseLogging()).isTrue();
+	}
+
+	@Test
+	void whenUsingDefaultConfigurationThenRequestHasCleanCacheDisabled() {
+		assertThat(this.buildImage.createRequest().isCleanCache()).isFalse();
+	}
+
+	@Test
+	void whenCleanCacheIsEnabledThenRequestHasCleanCacheEnabled() {
+		this.buildImage.setCleanCache(true);
+		assertThat(this.buildImage.createRequest().isCleanCache()).isTrue();
+	}
+
+	@Test
+	void whenNoBuilderIsConfiguredThenRequestHasDefaultBuilder() {
+		assertThat(this.buildImage.createRequest().getBuilder().getName()).isEqualTo("cloudfoundry/cnb");
+	}
+
+	@Test
+	void whenBuilderIsConfiguredThenRequestUsesSpecifiedBuilder() {
+		this.buildImage.setBuilder("example.com/test/builder:1.2");
+		assertThat(this.buildImage.createRequest().getBuilder().getName()).isEqualTo("test/builder");
+	}
+
+}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/testkit/GradleBuild.java

@@ -27,9 +27,16 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.jar.JarFile;
 
+import com.fasterxml.jackson.annotation.JsonView;
+import com.fasterxml.jackson.core.Versioned;
+import com.fasterxml.jackson.databind.Module;
+import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
+import com.sun.jna.Platform;
 import io.spring.gradle.dependencymanagement.DependencyManagementPlugin;
 import io.spring.gradle.dependencymanagement.dsl.DependencyManagementExtension;
 import org.apache.commons.compress.archivers.ArchiveEntry;
+import org.apache.http.HttpRequest;
+import org.apache.http.conn.HttpClientConnectionManager;
 import org.gradle.testkit.runner.BuildResult;
 import org.gradle.testkit.runner.GradleRunner;
 import org.gradle.util.GradleVersion;
@@ -41,6 +48,7 @@ import org.jetbrains.kotlin.gradle.plugin.KotlinGradleSubplugin;
 import org.jetbrains.kotlin.gradle.plugin.KotlinPlugin;
 
 import org.springframework.asm.ClassVisitor;
+import org.springframework.boot.buildpack.platform.build.BuildRequest;
 import org.springframework.boot.loader.tools.LaunchScript;
 import org.springframework.util.FileCopyUtils;
 import org.springframework.util.FileSystemUtils;
@@ -94,7 +102,12 @@ public class GradleBuild {
 				new File(pathOfJarContaining(KotlinPlugin.class)), new File(pathOfJarContaining(KotlinProject.class)),
 				new File(pathOfJarContaining(KotlinCompilerClient.class)),
 				new File(pathOfJarContaining(KotlinGradleSubplugin.class)),
-				new File(pathOfJarContaining(ArchiveEntry.class)));
+				new File(pathOfJarContaining(ArchiveEntry.class)), new File(pathOfJarContaining(BuildRequest.class)),
+				new File(pathOfJarContaining(HttpClientConnectionManager.class)),
+				new File(pathOfJarContaining(HttpRequest.class)), new File(pathOfJarContaining(Module.class)),
+				new File(pathOfJarContaining(Versioned.class)),
+				new File(pathOfJarContaining(ParameterNamesModule.class)),
+				new File(pathOfJarContaining(JsonView.class)), new File(pathOfJarContaining(Platform.class)));
 	}
 
 	private String pathOfJarContaining(Class<?> type) {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/bundling/BootBuildImageIntegrationTests.gradle

+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '{version}'
+}