Invoking Rhino Javascript from Java

Main.java

package com.github.gimmi.jsmake;

import org.mozilla.javascript.Context;
import org.mozilla.javascript.ContextAction;
import org.mozilla.javascript.ScriptableObject;
import org.mozilla.javascript.commonjs.module.Require;
import org.mozilla.javascript.tools.ToolErrorReporter;
import org.mozilla.javascript.tools.shell.Global;
import org.mozilla.javascript.tools.shell.QuitAction;
import org.mozilla.javascript.tools.shell.ShellContextFactory;

import java.io.File;
import java.net.MalformedURLException;
import java.util.Arrays;
import java.util.List;

public class Main {
	public static void main(String[] commandArgs) {
		final String jsmakeDirectory = commandArgs[0];
		final String currentDirectory = commandArgs[1];
		final String mainModuleId = commandArgs[2];
		final String[] scriptArgs = Arrays.copyOfRange(commandArgs, 3, commandArgs.length - 1);

		ShellContextFactory shellContextFactory = new ShellContextFactory();
		final Global global = new Global();
		global.initQuitAction(new QuitAction() {
			public void quit(Context cx, int exitCode) {
				System.exit(exitCode);
			}
		});
		ToolErrorReporter errorReporter = new ToolErrorReporter(false, global.getErr());
		shellContextFactory.setErrorReporter(errorReporter);
		global.init(shellContextFactory);

		shellContextFactory.call(new ContextAction() {
			public Object run(Context cx) {
				List<String> moduleUrls = Arrays.asList(pathNameToUrl(jsmakeDirectory), pathNameToUrl(currentDirectory));
				Require require = global.installRequire(cx, moduleUrls, false);

				Object[] array = new Object[scriptArgs.length];
				System.arraycopy(scriptArgs, 0, array, 0, scriptArgs.length);
				global.defineProperty("arguments", cx.newArray(global, array), ScriptableObject.DONTENUM);

				require.requireMain(cx, mainModuleId);

				return null;
			}
		});
	}

	private static String pathNameToUrl(String pathName) {
		try {
			return new File(pathName).toURI().toURL().toString();
		} catch (MalformedURLException e) {
			throw new RuntimeException(e);
		}
	}
}