Improve ArchitectureCheck to configure packages to ignore for nullability

buildSrc/src/main/java/org/springframework/boot/build/architecture/ArchitectureCheck.java

@@ -44,6 +44,7 @@
 import org.gradle.api.provider.ListProperty;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
+import org.gradle.api.provider.SetProperty;
 import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.IgnoreEmptyDirectories;
 import org.gradle.api.tasks.Input;
@@ -80,8 +81,8 @@ public ArchitectureCheck() {
 		getRules().addAll(ArchitectureRules.standard());
 		getRules().addAll(whenMainSources(
 				() -> Collections.singletonList(ArchitectureRules.allBeanMethodsShouldReturnNonPrivateType())));
-		getRules().addAll(and(getNullMarked(), isMainSourceSet()).map(whenTrue(
-				() -> Collections.singletonList(ArchitectureRules.packagesShouldBeAnnotatedWithNullMarked()))));
+		getRules().addAll(and(getNullMarkedEnabled(), isMainSourceSet()).map(whenTrue(() -> Collections.singletonList(
+				ArchitectureRules.packagesShouldBeAnnotatedWithNullMarked(getNullMarkedIgnoredPackages().get())))));
 		getRuleDescriptions().set(getRules().map(this::asDescriptions));
 	}
 
@@ -196,6 +197,9 @@ final FileTree getInputClasses() {
 	abstract ListProperty<String> getRuleDescriptions();
 
 	@Internal
-	abstract Property<Boolean> getNullMarked();
+	abstract Property<Boolean> getNullMarkedEnabled();
+
+	@Internal
+	abstract SetProperty<String> getNullMarkedIgnoredPackages();
 
 }

buildSrc/src/main/java/org/springframework/boot/build/architecture/ArchitectureCheckExtension.java

@@ -16,8 +16,14 @@
 
 package org.springframework.boot.build.architecture;
 
+import java.util.LinkedHashSet;
+
+import javax.inject.Inject;
+
+import org.gradle.api.Action;
+import org.gradle.api.model.ObjectFactory;
 import org.gradle.api.provider.Property;
-import org.jspecify.annotations.NullMarked;
+import org.gradle.api.provider.SetProperty;
 
 /**
  * Extension to configure the {@link ArchitecturePlugin}.
@@ -26,14 +32,51 @@
  */
 public abstract class ArchitectureCheckExtension {
 
-	public ArchitectureCheckExtension() {
-		getNullMarked().convention(true);
+	private final NullMarkedExtension nullMarked;
+
+	@Inject
+	public ArchitectureCheckExtension(ObjectFactory objects) {
+		this.nullMarked = objects.newInstance(NullMarkedExtension.class);
+	}
+
+	/**
+	 * Get the {@code NullMarked} extension.
+	 * @return the {@code NullMarked} extension
+	 */
+	public NullMarkedExtension getNullMarked() {
+		return this.nullMarked;
+	}
+
+	/**
+	 * Configure the {@code NullMarked} extension.
+	 * @param action the action to configure the {@code NullMarked} extension with
+	 */
+	public void nullMarked(Action<? super NullMarkedExtension> action) {
+		action.execute(this.nullMarked);
 	}
 
 	/**
-	 * Whether this project uses JSpecify's {@link NullMarked} annotations.
-	 * @return whether this project uses JSpecify's @NullMarked annotations
+	 * Extension to configure the {@code NullMarked} extension.
 	 */
-	public abstract Property<Boolean> getNullMarked();
+	public abstract static class NullMarkedExtension {
+
+		public NullMarkedExtension() {
+			getEnabled().convention(true);
+			getIgnoredPackages().convention(new LinkedHashSet<>());
+		}
+
+		/**
+		 * Whether this project uses JSpecify's {@code  NullMarked} annotations.
+		 * @return whether this project uses JSpecify's @NullMarked annotations
+		 */
+		public abstract Property<Boolean> getEnabled();
+
+		/**
+		 * Packages that should be ignored by the {@code NullMarked} checker.
+		 * @return the ignored packages
+		 */
+		public abstract SetProperty<String> getIgnoredPackages();
+
+	}
 
 }

buildSrc/src/main/java/org/springframework/boot/build/architecture/ArchitecturePlugin.java

@@ -59,7 +59,8 @@ private void registerTasks(Project project, ArchitectureCheckExtension extension
 							task.setDescription("Checks the architecture of the classes of the " + sourceSet.getName()
 									+ " source set.");
 							task.setGroup(LifecycleBasePlugin.VERIFICATION_GROUP);
-							task.getNullMarked().set(extension.getNullMarked());
+							task.getNullMarkedEnabled().set(extension.getNullMarked().getEnabled());
+							task.getNullMarkedIgnoredPackages().set(extension.getNullMarked().getIgnoredPackages());
 						});
 			packageTangleChecks.add(checkPackageTangles);
 		}

buildSrc/src/main/java/org/springframework/boot/build/architecture/ArchitectureRules.java

@@ -82,11 +82,6 @@ final class ArchitectureRules {
 
 	private static final String TEST_AUTOCONFIGURATION_ANNOTATION = "org.springframework.boot.test.autoconfigure.TestAutoConfiguration";
 
-	private static final Predicate<JavaPackage> NULL_MARKED_PACKAGE_FILTER = (candidate) -> !List
-		.of("org.springframework.boot.cli.json", "org.springframework.boot.configurationmetadata.json",
-				"org.springframework.boot.configurationprocessor.json")
-		.contains(candidate.getName());
-
 	private ArchitectureRules() {
 	}
 
@@ -262,8 +257,8 @@ private static ArchRule conditionalOnMissingBeanShouldNotSpecifyOnlyATypeThatIsT
 			.allowEmptyShould(true);
 	}
 
-	static ArchRule packagesShouldBeAnnotatedWithNullMarked() {
-		return ArchRuleDefinition.all(packages(NULL_MARKED_PACKAGE_FILTER))
+	static ArchRule packagesShouldBeAnnotatedWithNullMarked(Set<String> ignoredPackages) {
+		return ArchRuleDefinition.all(packages((javaPackage) -> !ignoredPackages.contains(javaPackage.getName())))
 			.should(beAnnotatedWithNullMarked())
 			.allowEmptyShould(true);
 	}

buildSrc/src/test/java/org/springframework/boot/build/architecture/ArchitectureCheckTests.java

@@ -26,6 +26,8 @@
 import java.util.LinkedHashSet;
 import java.util.Map;
 import java.util.Set;
+import java.util.function.UnaryOperator;
+import java.util.stream.Collectors;
 
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.testkit.runner.BuildResult;
@@ -40,6 +42,7 @@
 import org.junit.jupiter.params.provider.EnumSource;
 
 import org.springframework.util.ClassUtils;
+import org.springframework.util.CollectionUtils;
 import org.springframework.util.FileSystemUtils;
 import org.springframework.util.StringUtils;
 
@@ -65,7 +68,7 @@ class ArchitectureCheckTests {
 
 	@BeforeEach
 	void setup(@TempDir Path projectDir) {
-		this.gradleBuild = new GradleBuild(projectDir).withNullMarked(false);
+		this.gradleBuild = new GradleBuild(projectDir).withNullMarkedEnabled(false);
 	}
 
 	@ParameterizedTest(name = "{0}")
@@ -275,14 +278,23 @@ void whenBeanMethodExposesNonPrivateTypeShouldSucceedAndWriteEmptyReport(Task ta
 	@Test
 	void whenPackageIsNotAnnotatedWithNullMarkedWithMainSourcesShouldFailAndWriteEmptyReport() throws IOException {
 		prepareTask(Task.CHECK_ARCHITECTURE_MAIN, "nullmarked/notannotated");
-		buildAndFail(this.gradleBuild.withNullMarked(true), Task.CHECK_ARCHITECTURE_MAIN,
+		buildAndFail(this.gradleBuild.withNullMarkedEnabled(true), Task.CHECK_ARCHITECTURE_MAIN,
 				"Package org.springframework.boot.build.architecture.nullmarked.notannotated is not annotated with @NullMarked");
 	}
 
+	@Test
+	void whenPackageIsIgnoredAndNotAnnotatedWithNullMarkedWithMainSourcesShouldSucceedAndWriteEmptyReport()
+			throws IOException {
+		prepareTask(Task.CHECK_ARCHITECTURE_MAIN, "nullmarked/notannotated");
+		build(this.gradleBuild.withNullMarkedEnabled(true)
+			.withNullMarkedIgnoredPackages("org.springframework.boot.build.architecture.nullmarked.notannotated"),
+				Task.CHECK_ARCHITECTURE_MAIN);
+	}
+
 	@Test
 	void whenPackageIsNotAnnotatedWithNullMarkedWithTestSourcesShouldSucceedAndWriteEmptyReport() throws IOException {
 		prepareTask(Task.CHECK_ARCHITECTURE_TEST, "nullmarked/notannotated");
-		build(this.gradleBuild.withNullMarked(true), Task.CHECK_ARCHITECTURE_TEST);
+		build(this.gradleBuild.withNullMarkedEnabled(true), Task.CHECK_ARCHITECTURE_TEST);
 	}
 
 	@Test
@@ -386,7 +398,7 @@ private static final class GradleBuild {
 
 		private final Map<Task, Boolean> prohibitObjectsRequireNonNull = new LinkedHashMap<>();
 
-		private Boolean nullMarked;
+		private NullMarkedExtension nullMarkedExtension;
 
 		private GradleBuild(Path projectDir) {
 			this.projectDir = projectDir;
@@ -396,16 +408,29 @@ Path getProjectDir() {
 			return this.projectDir;
 		}
 
-		GradleBuild withNullMarked(Boolean nullMarked) {
-			this.nullMarked = nullMarked;
+		GradleBuild withProhibitObjectsRequireNonNull(Task task, boolean prohibitObjectsRequireNonNull) {
+			this.prohibitObjectsRequireNonNull.put(task, prohibitObjectsRequireNonNull);
+			return this;
+		}
+
+		GradleBuild withNullMarkedEnabled(Boolean enabled) {
+			configureNullMarkedExtension((nullMarked) -> nullMarked.withEnabled(enabled));
 			return this;
 		}
 
-		GradleBuild withProhibitObjectsRequireNonNull(Task task, boolean prohibitObjectsRequireNonNull) {
-			this.prohibitObjectsRequireNonNull.put(task, prohibitObjectsRequireNonNull);
+		GradleBuild withNullMarkedIgnoredPackages(String... ignorePackages) {
+			configureNullMarkedExtension((nullMarked) -> nullMarked.withIgnoredPackages(ignorePackages));
 			return this;
 		}
 
+		private void configureNullMarkedExtension(UnaryOperator<NullMarkedExtension> configurer) {
+			NullMarkedExtension nullMarkedExtension = this.nullMarkedExtension;
+			if (nullMarkedExtension == null) {
+				nullMarkedExtension = new NullMarkedExtension(null, null);
+			}
+			this.nullMarkedExtension = configurer.apply(nullMarkedExtension);
+		}
+
 		GradleBuild withDependencies(String... dependencies) {
 			this.dependencies.addAll(Arrays.asList(dependencies));
 			return this;
@@ -444,11 +469,22 @@ private GradleRunner prepareRunner(String... arguments) throws IOException {
 				.append("    prohibitObjectsRequireNonNull = ")
 				.append(prohibitObjectsRequireNonNull)
 				.append("\n}\n\n"));
-			if (this.nullMarked != null) {
-				buildFile.append("architectureCheck {\n")
-					.append("    nullMarked = ")
-					.append(this.nullMarked)
-					.append("\n}\n");
+			NullMarkedExtension nullMarkedExtension = this.nullMarkedExtension;
+			if (nullMarkedExtension != null) {
+				buildFile.append("architectureCheck {");
+				buildFile.append("\n    nullMarked {");
+				if (nullMarkedExtension.enabled() != null) {
+					buildFile.append("\n        enabled = ").append(nullMarkedExtension.enabled());
+				}
+				if (!CollectionUtils.isEmpty(nullMarkedExtension.ignoredPackages())) {
+					buildFile.append("\n        ignoredPackages = ")
+						.append(nullMarkedExtension.ignoredPackages()
+							.stream()
+							.map(StringUtils::quote)
+							.collect(Collectors.joining(",", "[", "]")));
+				}
+				buildFile.append("\n     }");
+				buildFile.append("\n}\n\n");
 			}
 			Files.writeString(this.projectDir.resolve("build.gradle"), buildFile, StandardCharsets.UTF_8);
 			return GradleRunner.create()
@@ -457,6 +493,18 @@ private GradleRunner prepareRunner(String... arguments) throws IOException {
 				.withPluginClasspath();
 		}
 
+		private record NullMarkedExtension(Boolean enabled, Set<String> ignoredPackages) {
+
+			private NullMarkedExtension withEnabled(Boolean enabled) {
+				return new NullMarkedExtension(enabled, this.ignoredPackages);
+			}
+
+			private NullMarkedExtension withIgnoredPackages(String... ignoredPackages) {
+				return new NullMarkedExtension(this.enabled, new LinkedHashSet<>(Arrays.asList(ignoredPackages)));
+			}
+
+		}
+
 	}
 
 }

cli/spring-boot-cli/build.gradle

@@ -62,7 +62,10 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled  = false
+		ignoredPackages = ['org.springframework.boot.cli.json']
+	}
 }
 
 tasks.register("fullJar", Jar) {

configuration-metadata/spring-boot-configuration-metadata-changelog-generator/build.gradle

@@ -39,7 +39,9 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }
 
 def dependenciesOf(String version) {

configuration-metadata/spring-boot-configuration-metadata/build.gradle

@@ -36,5 +36,8 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled  = false
+		ignoredPackages = ["org.springframework.boot.configurationmetadata.json"]
+	}
 }

configuration-metadata/spring-boot-configuration-processor/build.gradle

@@ -31,7 +31,10 @@ sourceSets {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled  = false
+		ignoredPackages = ["org.springframework.boot.configurationprocessor.json"]
+	}
 }
 
 dependencies {

core/spring-boot-autoconfigure-processor/build.gradle

@@ -28,5 +28,7 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }

documentation/spring-boot-docs/build.gradle

@@ -71,7 +71,9 @@ tasks.named('compileKotlin', KotlinCompilationTask.class) {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }
 
 plugins.withType(EclipsePlugin) {

loader/spring-boot-loader/build.gradle

@@ -38,5 +38,7 @@ tasks.configureEach {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }

smoke-test/spring-boot-smoke-test-webflux-coroutines/build.gradle

@@ -34,5 +34,7 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }

test-support/spring-boot-docker-test-support/build.gradle

@@ -52,5 +52,7 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }

test-support/spring-boot-gradle-test-support/build.gradle

@@ -32,5 +32,7 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }

test-support/spring-boot-test-support/build.gradle

@@ -63,5 +63,7 @@ dependencies {
 }
 
 architectureCheck {
-	nullMarked = false
+	nullMarked {
+		enabled = false
+	}
 }