Migrate outdated APIs and bump the min Gradle requirement to 7.1

Author: Goooler

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/GroovyExtension.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 DiffPlug
+ * Copyright 2016-2025 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,11 +18,8 @@
 import javax.inject.Inject;
 
 import org.gradle.api.GradleException;
-import org.gradle.api.internal.plugins.DslObject;
 import org.gradle.api.plugins.GroovyBasePlugin;
 import org.gradle.api.tasks.GroovySourceDirectorySet;
-import org.gradle.api.tasks.GroovySourceSet;
-import org.gradle.util.GradleVersion;
 
 import com.diffplug.spotless.generic.LicenseHeaderStep;
 
@@ -66,12 +63,7 @@ protected void setupTask(SpotlessTask task) {
 			target = getSources(getProject(),
 					message,
 					sourceSet -> {
-						if (GradleVersion.current().compareTo(GradleVersion.version(SpotlessPlugin.VER_GRADLE_javaPluginExtension)) >= 0) {
-							return sourceSet.getExtensions().getByType(GroovySourceDirectorySet.class);
-						} else {
-							final GroovySourceSet groovySourceSet = new DslObject(sourceSet).getConvention().getPlugin(GroovySourceSet.class);
-							return groovySourceSet.getGroovy();
-						}
+						return sourceSet.getExtensions().getByType(GroovySourceDirectorySet.class);
 					},
 					file -> {
 						final String name = file.getName();

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/JvmLang.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 DiffPlug
+ * Copyright 2023-2025 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,31 +22,20 @@
 import org.gradle.api.Project;
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.file.SourceDirectorySet;
-import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.specs.Spec;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.SourceSetContainer;
-import org.gradle.util.GradleVersion;
 
 interface JvmLang {
 
 	default FileCollection getSources(Project project, String message, Function<SourceSet, SourceDirectorySet> sourceSetSourceDirectory, Spec<? super File> filterSpec) {
-		final SourceSetContainer sourceSets;
 		FileCollection union = project.files();
-		if (GradleVersion.current().compareTo(GradleVersion.version(SpotlessPlugin.VER_GRADLE_javaPluginExtension)) >= 0) {
-			final JavaPluginExtension javaPluginExtension = project.getExtensions().findByType(JavaPluginExtension.class);
-			if (javaPluginExtension == null) {
-				throw new GradleException(message);
-			}
-			sourceSets = javaPluginExtension.getSourceSets();
-		} else {
-			final JavaPluginConvention javaPluginConvention = project.getConvention().findPlugin(JavaPluginConvention.class);
-			if (javaPluginConvention == null) {
-				throw new GradleException(message);
-			}
-			sourceSets = javaPluginConvention.getSourceSets();
+		final JavaPluginExtension javaPluginExtension = project.getExtensions().findByType(JavaPluginExtension.class);
+		if (javaPluginExtension == null) {
+			throw new GradleException(message);
 		}
+		final SourceSetContainer sourceSets = javaPluginExtension.getSourceSets();
 		for (SourceSet sourceSet : sourceSets) {
 			union = union.plus(sourceSetSourceDirectory.apply(sourceSet).filter(filterSpec));
 		}

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/SpotlessPlugin.java

@@ -27,8 +27,7 @@
 
 public class SpotlessPlugin implements Plugin<Project> {
 	static final String SPOTLESS_MODERN = "spotlessModern";
-	static final String VER_GRADLE_min = "6.1.1";
-	static final String VER_GRADLE_javaPluginExtension = "7.1";
+	static final String VER_GRADLE_min = "7.1";
 	static final String VER_GRADLE_minVersionForCustom = "8.4";
 	private static final int MINIMUM_JRE = 11;
 

testlib/src/main/java/com/diffplug/spotless/TestProvisioner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2024 DiffPlug
+ * Copyright 2016-2025 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,7 +82,7 @@ private static Provisioner createWithRepositories(Consumer<RepositoryHandler> re
 				return config.resolve();
 			} catch (ResolveException e) {
 				/* Provide Maven coordinates in exception message instead of static string 'detachedConfiguration' */
-				throw new ResolveException(config.getDescription(), e);
+				throw Errors.asRuntime(e);
 			} finally {
 				// delete the temp dir
 				try {