Move NoHttp config to Gradle conventions

See gh-30339

build.gradle

@@ -1,5 +1,4 @@
 plugins {
-	id 'io.spring.nohttp' version '0.0.11'
 	id 'io.freefair.aspectj' version '8.0.1' apply false
 	// kotlinVersion is managed in gradle.properties
 	id 'org.jetbrains.kotlin.plugin.serialization' version "${kotlinVersion}" apply false
@@ -121,23 +120,5 @@ configure(moduleProjects) { project ->
 
 configure(rootProject) {
 	description = "Spring Framework"
-
-	apply plugin: "io.spring.nohttp"
 	apply plugin: 'org.springframework.build.api-diff'
-
-	nohttp {
-		source.exclude "**/test-output/**"
-		allowlistFile = project.file("src/nohttp/allowlist.lines")
-		def rootPath = file(rootDir).toPath()
-		def projectDirs = allprojects.collect { it.projectDir } + "${rootDir}/buildSrc"
-		projectDirs.forEach { dir ->
-			[ 'bin', 'build', 'out', '.settings' ]
-				.collect { rootPath.relativize(new File(dir, it).toPath()) }
-				.forEach { source.exclude "$it/**" }
-			[ '.classpath', '.project' ]
-				.collect { rootPath.relativize(new File(dir, it).toPath()) }
-				.forEach { source.exclude "$it" }
-		}
-	}
-
 }

buildSrc/build.gradle

@@ -20,11 +20,12 @@ ext {
 
 dependencies {
 	checkstyle "io.spring.javaformat:spring-javaformat-checkstyle:${javaFormatVersion}"
-	implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
-	implementation("org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}")
+	implementation "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}"
+	implementation "org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}"
 	implementation "me.champeau.gradle:japicmp-gradle-plugin:0.3.0"
 	implementation "org.gradle:test-retry-gradle-plugin:1.4.1"
-	implementation("io.spring.javaformat:spring-javaformat-gradle-plugin:${javaFormatVersion}")
+	implementation "io.spring.javaformat:spring-javaformat-gradle-plugin:${javaFormatVersion}"
+	implementation "io.spring.nohttp:nohttp-gradle:0.0.11"
 }
 
 gradlePlugin {

buildSrc/src/main/java/org/springframework/build/CheckstyleConventions.java

@@ -17,7 +17,8 @@
 package org.springframework.build;
 
 import io.spring.javaformat.gradle.SpringJavaFormatPlugin;
-import io.spring.javaformat.gradle.tasks.Format;
+import io.spring.nohttp.gradle.NoHttpExtension;
+import io.spring.nohttp.gradle.NoHttpPlugin;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.DependencySet;
@@ -26,6 +27,9 @@ import org.gradle.api.plugins.quality.Checkstyle;
 import org.gradle.api.plugins.quality.CheckstyleExtension;
 import org.gradle.api.plugins.quality.CheckstylePlugin;
 
+import java.nio.file.Path;
+import java.util.List;
+
 /**
  * {@link Plugin} that applies conventions for checkstyle.
  * @author Brian Clozel
@@ -38,6 +42,9 @@ public class CheckstyleConventions {
 	 */
 	public void apply(Project project) {
 		project.getPlugins().withType(JavaBasePlugin.class, (java) -> {
+			if (project.getRootProject() == project) {
+				configureNoHttpPlugin(project);
+			}
 			project.getPlugins().apply(CheckstylePlugin.class);
 			project.getTasks().withType(Checkstyle.class).forEach(checkstyle -> checkstyle.getMaxHeapSize().set("1g"));
 			CheckstyleExtension checkstyle = project.getExtensions().getByType(CheckstyleExtension.class);
@@ -50,4 +57,20 @@ public class CheckstyleConventions {
 		});
 	}
 
+	private static void configureNoHttpPlugin(Project project) {
+		project.getPlugins().apply(NoHttpPlugin.class);
+		NoHttpExtension noHttp = project.getExtensions().getByType(NoHttpExtension.class);
+		noHttp.setAllowlistFile(project.file("src/nohttp/allowlist.lines"));
+		noHttp.getSource().exclude("**/test-output/**", "**/.settings/**",
+				"**/.classpath", "**/.project");
+		List<String> buildFolders = List.of("bin", "build", "out");
+		project.allprojects(subproject -> {
+			Path rootPath = project.getRootDir().toPath();
+			Path projectPath = rootPath.relativize(subproject.getProjectDir().toPath());
+			for (String buildFolder : buildFolders) {
+				noHttp.getSource().exclude(projectPath.resolve(buildFolder).resolve("**").toString());
+			}
+		});
+	}
+
 }