Apply nohttp check per-project rather than at root

Switch nohttp checks to a convention that is applied per-project rather
than at the root. This should help to reduce memory consumption.

Closes gh-42332

build.gradle

@@ -1,29 +1,12 @@
 plugins {
 	id "base"
 	id "org.jetbrains.kotlin.jvm" apply false // https://youtrack.jetbrains.com/issue/KT-30276
-	id "io.spring.nohttp" version "0.0.11"
 }
 
 description = "Spring Boot Build"
 
 defaultTasks 'build'
 
-nohttp {
-	allowlistFile = project.file("src/nohttp/allowlist.lines")
-	source.exclude "**/bin/**"
-	source.exclude "**/build/**"
-	source.exclude "**/out/**"
-	source.exclude "**/target/**"
-	source.exclude "**/.settings/**"
-	source.exclude "**/.classpath"
-	source.exclude "**/.project"
-	source.exclude "spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/resources/org/springframework/boot/buildpack/platform/docker/export.tar"
-}
-
-check {
-	dependsOn checkstyleNohttp
-}
-
 allprojects {
 	group "org.springframework.boot"
 
@@ -41,7 +24,3 @@ allprojects {
 		resolutionStrategy.cacheChangingModulesFor 0, "minutes"
 	}
 }
-
-tasks.named("checkstyleNohttp").configure {
-	maxHeapSize = "1536m"
-}

buildSrc/build.gradle

@@ -53,6 +53,7 @@ dependencies {
 	implementation("org.springframework:spring-context")
 	implementation("org.springframework:spring-core")
 	implementation("org.springframework:spring-web")
+	implementation("io.spring.nohttp:nohttp-gradle:0.0.11")
 
 	testImplementation("org.assertj:assertj-core:${versions.assertj}")
 	testImplementation("org.hamcrest:hamcrest:${versions.hamcrest}")

buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * 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.
@@ -43,6 +43,7 @@ public class ConventionsPlugin implements Plugin<Project> {
 
 	@Override
 	public void apply(Project project) {
+		new NoHttpConventions().apply(project);
 		new JavaConventions().apply(project);
 		new MavenPublishingConventions().apply(project);
 		new AsciidoctorConventions().apply(project);

buildSrc/src/main/java/org/springframework/boot/build/NoHttpConventions.java

@@ -0,0 +1,54 @@
+/*
+ * 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.springframework.boot.build;
+
+import io.spring.nohttp.gradle.NoHttpCheckstylePlugin;
+import io.spring.nohttp.gradle.NoHttpExtension;
+import org.gradle.api.Project;
+import org.gradle.api.file.ConfigurableFileTree;
+import org.gradle.api.plugins.quality.Checkstyle;
+
+/**
+ * Conventions that are applied to enforce that no HTTP urls are used.
+ *
+ * @author Phillip Webb
+ */
+public class NoHttpConventions {
+
+	void apply(Project project) {
+		project.getPluginManager().apply(NoHttpCheckstylePlugin.class);
+		configureNoHttpExtension(project, project.getExtensions().getByType(NoHttpExtension.class));
+		project.getTasks()
+			.named(NoHttpCheckstylePlugin.CHECKSTYLE_NOHTTP_TASK_NAME, Checkstyle.class)
+			.configure((task) -> task.getConfigDirectory().set(project.getRootProject().file("src/nohttp")));
+	}
+
+	private void configureNoHttpExtension(Project project, NoHttpExtension extension) {
+		extension.setAllowlistFile(project.getRootProject().file("src/nohttp/allowlist.lines"));
+		ConfigurableFileTree source = extension.getSource();
+		source.exclude("bin/**");
+		source.exclude("build/**");
+		source.exclude("out/**");
+		source.exclude("target/**");
+		source.exclude(".settings/**");
+		source.exclude(".classpath");
+		source.exclude(".project");
+		source.exclude(".gradle");
+		source.exclude("**/docker/export.tar");
+	}
+
+}