Test sass.js with Rhino

README.md

This should help you test sass.js using Rhino.

Some notes:

• I have included a sample pom.xml in case you would like to use Maven. The important part is that I am using Rhino 1.7 (latest version).
• The TestRhino#main method initializes a Rhino context which loads the main.js module using CommonJs
• Create a "modules" directory anywhere in the application classpath. If using Maven to create the project, "src/main/resources" will be in the classpath by convention.
• Add main.js directly in the "modules" directory
• Clone sass.js in the "modules" directory. Basically, you will be able to require modules relative to the "modules" directory. In my main.js example, I copied "sass.js/dist" to "modules/sass".

main.js

java.lang.System.out.println('requiring sass.sync.js...');
var Sass = require('sass/sass.sync.js');

java.lang.System.out.println('instantiating Sass...');
var sass = new Sass();

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>sass.js</groupId>
    <artifactId>sass-compiler</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>sass-compiler</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.mozilla</groupId>
            <artifactId>rhino</artifactId>
            <version>1.7.7</version>
        </dependency>
    </dependencies>
</project>

SystemOut.log

Exception in thread "main" java.lang.RuntimeException: could not run script
	at com.enchoice.kwcn.TestRhino.main(TestRhino.java:33)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: org.mozilla.javascript.EcmaError: ReferenceError: "print" is not defined. (file:/Users/fredfortier/Code/kwcn-post-13/sass-compiler/target/classes/modules/sass/sass.sync.js#76)
	at org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3951)
	at org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3929)
	at org.mozilla.javascript.ScriptRuntime.notFoundError(ScriptRuntime.java:4019)
	at org.mozilla.javascript.ScriptRuntime.nameOrFunction(ScriptRuntime.java:1917)
	at org.mozilla.javascript.ScriptRuntime.name(ScriptRuntime.java:1856)
	at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:1558)
	at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:815)
	at org.mozilla.javascript.InterpretedFunction.exec(InterpretedFunction.java:123)
	at org.mozilla.javascript.commonjs.module.Require.executeModuleScript(Require.java:342)
	at org.mozilla.javascript.commonjs.module.Require.getExportedModuleInterface(Require.java:290)
	at org.mozilla.javascript.commonjs.module.Require.call(Require.java:219)
	at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:1479)
	at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:815)
	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:109)
	at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:393)
	at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3282)
	at org.mozilla.javascript.InterpretedFunction.exec(InterpretedFunction.java:120)
	at org.mozilla.javascript.commonjs.module.Require.executeModuleScript(Require.java:342)
	at org.mozilla.javascript.commonjs.module.Require.getExportedModuleInterface(Require.java:290)
	at org.mozilla.javascript.commonjs.module.Require.requireMain(Require.java:137)
	at com.enchoice.kwcn.TestRhino.main(TestRhino.java:28)
	... 5 more

TestRhino.java

import org.mozilla.javascript.Context;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.commonjs.module.Require;
import org.mozilla.javascript.commonjs.module.provider.StrongCachingModuleScriptProvider;
import org.mozilla.javascript.commonjs.module.provider.UrlModuleSourceProvider;

import java.net.URI;
import java.util.Collections;

public class TestRhino {
    public static void main(String[] args) {
        try {
            URI modulesUri = Thread.currentThread().getContextClassLoader().getResource("modules/").toURI();
            System.out.println("the modules uri: " + modulesUri.getPath());
            final Context cx = Context.enter();
            try {
                cx.setOptimizationLevel(-1);
                Scriptable scope = cx.initStandardObjects();

                Require require = new Require(cx, scope,
                        new StrongCachingModuleScriptProvider(
                                new UrlModuleSourceProvider(
                                        Collections.singleton(modulesUri), null)),
                        null, null, false);
                require.requireMain(cx, "main");
            } finally {
                Context.exit();
            }
        } catch (Exception e) {
            throw new RuntimeException("could not run script", e);
        }
    }
}