Add 'enableNativeAccess' feature to 'FatModuleJar' task

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Java Module Packaging Gradle Plugin - Changelog
 
 ## Version 1.3.1
+- [#147](https://github.com/gradlex-org/java-module-packaging/issues/147) - Add 'enableNativeAccess' feature to 'FatModuleJar' task
 - [#146](https://github.com/gradlex-org/java-module-packaging/issues/146) - Update default 'fatModueJar' launcher to 'build.jenesis.launcher:0.6.5'
 
 ## Version 1.3

src/main/java/org/gradlex/javamodule/packaging/tasks/FatModuleJar.java

@@ -13,6 +13,7 @@
 import org.gradle.api.file.ConfigurableFileCollection;
 import org.gradle.api.internal.file.FileOperations;
 import org.gradle.api.internal.file.copy.CopySpecInternal;
+import org.gradle.api.provider.ListProperty;
 import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.Input;
@@ -32,6 +33,9 @@ public abstract class FatModuleJar extends Jar {
     @Input
     public abstract Property<String> getMainClass();
 
+    @Input
+    public abstract ListProperty<String> getEnableNativeAccess();
+
     @Classpath
     public abstract ConfigurableFileCollection getLauncherPath();
 
@@ -56,6 +60,10 @@ protected void copy() {
         getManifest()
                 .attributes(singletonMap("Main-Class", getLauncherMainClass().get()));
 
+        if (!getEnableNativeAccess().get().isEmpty()) {
+            getManifest().attributes(singletonMap("Enable-Native-Access", "ALL-UNNAMED"));
+        }
+
         CopySpecInternal extendedSpec = (CopySpecInternal) getFiles().copySpec();
         extendedSpec.with(getRootSpec());
 
@@ -87,14 +95,22 @@ protected void copy() {
 
     private File writeApplicationProperties() {
         File applicationProperties = new File(getTemporaryDir(), "application.properties");
+        String enableNativeAccess;
+        if (getEnableNativeAccess().get().isEmpty()) {
+            enableNativeAccess = "";
+        } else {
+            enableNativeAccess = "enableNativeAccess="
+                    + String.join(",", getEnableNativeAccess().get()) + "\n";
+        }
         try {
             Files.createDirectories(applicationProperties.toPath().getParent());
             Files.write(
                     applicationProperties.toPath(),
                     String.format(
-                                    "mainModule=%s\nmainClass=%s\nmodulepath=%s",
+                                    "mainModule=%s\nmainClass=%s\n%smodulepath=%s",
                                     getMainModule().get(),
                                     getMainClass().get(),
+                                    enableNativeAccess,
                                     getModulePath().getFiles().stream()
                                             .map(this::nameWithoutExtension)
                                             .collect(Collectors.joining(",")))

src/test/java/org/gradlex/javamodule/packaging/test/FatModuleJarTest.java

@@ -47,6 +47,14 @@ void offers_one_fat_jar_task_for_the_default_target() {
         build.build(":app:fatModuleJar");
         assertThat(build.projectDir.file("app/build/libs/app-1.0-all.jar").getAsPath())
                 .isRegularFile();
+        assertThat(build.projectDir
+                        .file("app/build/tmp/fatModuleJar/application.properties")
+                        .getAsPath())
+                .hasContent("""
+                mainModule=org.example.app
+                mainClass=org.example.app.Main
+                modulepath=app-1.0,commons-csv-1.14.1,commons-io-2.20.0,commons-codec-1.19.0
+                """);
     }
 
     @Test
@@ -159,16 +167,36 @@ void fat_jar_runs() throws IOException, InterruptedException {
                 .toAbsolutePath()
                 .toString();
 
-        System.out.println(javaCmd + " -jar " + fatJar);
         String[] command = {javaCmd, "-jar", fatJar};
         Process process = new ProcessBuilder(command).redirectErrorStream(true).start();
 
         var reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
         String line;
         while ((line = reader.readLine()) != null) {
-            System.out.println(line);
             assertThat(line).isEqualTo("org.example.app / true");
         }
         assertThat(process.waitFor()).isEqualTo(0);
     }
+
+    @Test
+    void can_enable_native_access() throws IOException, InterruptedException {
+        build.appBuildFile.appendText("""
+            version = "1.0"
+            tasks.fatModuleJar {
+                enableNativeAccess.set(listOf("org.example.app"))
+            }
+        """);
+
+        build.build(":app:fatModuleJar");
+
+        assertThat(build.projectDir
+                        .file("app/build/tmp/fatModuleJar/application.properties")
+                        .getAsPath())
+                .hasContent("""
+                mainModule=org.example.app
+                mainClass=org.example.app.Main
+                enableNativeAccess=org.example.app
+                modulepath=app-1.0,commons-csv-1.14.1,commons-io-2.20.0,commons-codec-1.19.0
+                """);
+    }
 }