Refine conventions to exclude checking of generated source

Closes gh-49153

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

@@ -42,6 +42,7 @@ import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.ConfigurationContainer;
 import org.gradle.api.artifacts.Dependency;
 import org.gradle.api.artifacts.DependencySet;
+import org.gradle.api.file.FileTreeElement;
 import org.gradle.api.plugins.JavaBasePlugin;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginExtension;
@@ -50,6 +51,7 @@ import org.gradle.api.plugins.quality.CheckstyleExtension;
 import org.gradle.api.plugins.quality.CheckstylePlugin;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.SourceSetContainer;
+import org.gradle.api.tasks.SourceTask;
 import org.gradle.api.tasks.TaskProvider;
 import org.gradle.api.tasks.bundling.Jar;
 import org.gradle.api.tasks.compile.JavaCompile;
@@ -298,6 +300,17 @@ class JavaConventions {
 			.add(project.getDependencies().create("com.puppycrawl.tools:checkstyle:" + checkstyle.getToolVersion()));
 		checkstyleDependencies
 			.add(project.getDependencies().create("io.spring.javaformat:spring-javaformat-checkstyle:" + version));
+		project.getTasks().withType(CheckFormat.class, this::excludeGeneratedSources);
+		project.getTasks().withType(Checkstyle.class, this::excludeGeneratedSources);
+	}
+
+	private SourceTask excludeGeneratedSources(SourceTask task) {
+		return task.exclude(this::isGeneratedSource);
+	}
+
+	private boolean isGeneratedSource(FileTreeElement candidate) {
+		String path = candidate.getFile().getPath();
+		return path.contains("/generated/sources/") || path.contains("/generated-source/");
 	}
 
 	private void configureDependencyManagement(Project project) {

core/spring-boot/build.gradle

@@ -82,9 +82,6 @@ def syncJavaTemplates = tasks.register("syncJavaTemplates", Sync) {
 }
 
 tasks.named("checkFormatMain") {
-	def generatedSources = fileTree("build/generated-sources/main")
-	// Exclude source generated from the templates as expand(properties) changes line endings on Windows
-	exclude { candidate -> generatedSources.contains(candidate.file) }
 	// Add the templates to check that the input is correctly formatted
 	source(fileTree("src/main/javaTemplates"))
 }