Do not automatically apply the gradle-modules-plugin if the project uses a Gradle version >= 6.4.

README.md

@@ -56,7 +56,6 @@ To use the plugin, apply the following two steps:
     }
     apply(plugin = "org.openjfx.javafxplugin")
 
-
 ### 2. Specify JavaFX modules
 
 Specify all the JavaFX modules that your project uses:
@@ -136,4 +135,32 @@ Setting a valid path to the local JavaFX SDK will take precedence:
     javafx {
         sdk = "/path/to/javafx-sdk"
         modules("javafx.controls", "javafx.fxml")
-    }
+    }
+
+### 6. Native module support (Gradle 7.0 and above)
+
+Since Gradle 7.0, Gradle has native support for Java modules. This plugin adds 
+the [gradle-modules-plugin](https://github.com/java9-modularity/gradle-modules-plugin) by default. If you would like to use Gradle's native 
+module support instead, you can disable the modules plugin by specifying:
+
+**Groovy/Kotlin**
+
+    javafx {
+        useNativeModuleSupport = true;
+    }
+
+
+Note that in Gradle versions 6.4 - 6.9, you have to explicitly enable native
+module support:
+
+**Groovy/Kotlin**
+
+    java {
+        modularity.inferModulePath.set(true)
+    }
+
+In Gradle versions below 6.4, setting the `useNativeModuleSupport` option to `true` 
+will have no effect.
+
+
+

src/main/java/org/openjfx/gradle/JavaFXOptions.java

@@ -31,6 +31,7 @@
 
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.repositories.FlatDirectoryArtifactRepository;
+import org.gradle.util.VersionNumber;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -54,6 +55,7 @@ public class JavaFXOptions {
     private String lastUpdatedConfiguration;
     private List<String> modules = new ArrayList<>();
     private FlatDirectoryArtifactRepository customSDKArtifactRepository;
+    private boolean useNativeModuleSupport = true;
 
     public JavaFXOptions(Project project) {
         this.project = project;
@@ -113,6 +115,14 @@ public void modules(String...moduleNames) {
         setModules(List.of(moduleNames));
     }
 
+    public boolean isUseNativeModuleSupport() {
+        return useNativeModuleSupport && isGradleVersionWithNativeModuleSupport();
+    }
+
+    public void setUseNativeModuleSupport(boolean useNativeModuleSupport) {
+        this.useNativeModuleSupport = useNativeModuleSupport;
+    }
+
     private void updateJavaFXDependencies() {
         clearJavaFXDependencies();
 
@@ -159,4 +169,10 @@ private void clearJavaFXDependencies() {
                     .removeIf(dependency -> MAVEN_JAVAFX_ARTIFACT_GROUP_ID.equals(dependency.getGroup()));
         }
     }
+
+    private boolean isGradleVersionWithNativeModuleSupport() {
+        VersionNumber thisVersionNumber = VersionNumber.parse(project.getGradle().getGradleVersion());
+        VersionNumber lowestVersionNumberWithJavaFXSupport = VersionNumber.parse("6.4-rc-1");
+        return thisVersionNumber.compareTo(lowestVersionNumberWithJavaFXSupport) >= 0;
+    }
 }

src/main/java/org/openjfx/gradle/JavaFXPlugin.java

@@ -32,6 +32,7 @@
 import com.google.gradle.osdetector.OsDetectorPlugin;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
+import org.gradle.api.plugins.JavaPlugin;
 import org.javamodularity.moduleplugin.ModuleSystemPlugin;
 import org.openjfx.gradle.tasks.ExecTask;
 
@@ -40,10 +41,16 @@ public class JavaFXPlugin implements Plugin<Project> {
     @Override
     public void apply(Project project) {
         project.getPlugins().apply(OsDetectorPlugin.class);
-        project.getPlugins().apply(ModuleSystemPlugin.class);
 
-        project.getExtensions().create("javafx", JavaFXOptions.class, project);
+        JavaFXOptions options = project.getExtensions().create("javafx", JavaFXOptions.class, project);
+
+        if (options.isUseNativeModuleSupport()) {
+            project.getPlugins().apply(JavaPlugin.class);
+        } else {
+            project.getPlugins().apply(ModuleSystemPlugin.class);
+        }
 
         project.getTasks().create("configJavafxRun", ExecTask.class, project);
     }
+
 }

src/main/java/org/openjfx/gradle/tasks/ExecTask.java

@@ -90,6 +90,10 @@ public void action() {
                     // Remove empty JavaFX jars from classpath
                     execTask.setClasspath(classpathWithoutJavaFXJars.plus(javaFXPlatformJars));
                     definedJavaFXModuleNames.forEach(javaFXModule -> moduleOptions.getAddModules().add(javaFXModule));
+                } else if (javaFXOptions.isUseNativeModuleSupport()) {
+                    LOGGER.info("Plugin configured to use native module support.");
+                    // Remove empty JavaFX jars from classpath
+                    execTask.setClasspath(classpathWithoutJavaFXJars.plus(javaFXPlatformJars));
                 } else {
                     LOGGER.info("Non-modular JavaFX application found");
                     // Remove all JavaFX jars from classpath