From c74ea769a1c6079932443cef3cc6673068276962 Mon Sep 17 00:00:00 2001
From: OpenCode <opencode@example.com>
Date: Thu, 28 May 2026 07:27:13 +0000
Subject: [PATCH] Accept JS file as argument and support NPM modules via
 jvm-npm

- HelloNashorn now takes a JS file path as command-line argument
- Uses jvm-npm (org.bsc:jvm-npm-core:1.1.0) for require() support
- Require.root set to script's parent dir so node_modules resolves correctly
- Engine created with -scripting mode for load() support
---
 build.gradle                                |  1 +
 src/main/java/com/example/HelloNashorn.java | 25 +++++++++++++++------
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/build.gradle b/build.gradle
index 08f523d..246353c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,6 +9,7 @@ repositories {
 
 dependencies {
     implementation 'org.openjdk.nashorn:nashorn-core:15.6'
+    implementation 'org.bsc:jvm-npm-core:1.1.0'
 }
 
 application {
diff --git a/src/main/java/com/example/HelloNashorn.java b/src/main/java/com/example/HelloNashorn.java
index 9b439cd..c9251ff 100644
--- a/src/main/java/com/example/HelloNashorn.java
+++ b/src/main/java/com/example/HelloNashorn.java
@@ -3,18 +3,29 @@ package com.example;
 import org.openjdk.nashorn.api.scripting.NashornScriptEngineFactory;
 
 import javax.script.ScriptEngine;
+import java.io.File;
 
 public class HelloNashorn {
     public static void main(String[] args) throws Exception {
+        if (args.length == 0) {
+            System.err.println("Usage: HelloNashorn <script.js>");
+            System.exit(1);
+        }
+
+        File scriptFile = new File(args[0]).getAbsoluteFile();
+        if (!scriptFile.isFile()) {
+            System.err.println("File not found: " + args[0]);
+            System.exit(1);
+        }
+
         NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
-        ScriptEngine engine = factory.getScriptEngine();
+        ScriptEngine engine = factory.getScriptEngine("-scripting");
 
-        engine.eval("print('Hello World from JavaScript!')");
+        engine.put("__rootDir", scriptFile.getParent());
+        engine.eval("load('classpath:jvm-npm.js')");
+        engine.eval("Require.root = __rootDir");
 
-        String result = (String) engine.eval(
-            "var greeting = 'Hello from Nashorn on JDK ' + java.lang.System.getProperty('java.version');" +
-            "greeting"
-        );
-        System.out.println(result);
+        engine.put("__scriptFile", scriptFile.getAbsolutePath());
+        engine.eval("load(__scriptFile)");
     }
 }