How do you include another js file in Google's v8?

Question

How do you include another script file inside a .js script file in v8?
There's the <script> tag in HTML but how can it be done inside a v8 embedded program?

Answer 1

You have to add this functionality manually, here is how I did it:

Handle<Value> Include(const Arguments& args) {
    for (int i = 0; i < args.Length(); i++) {
        String::Utf8Value str(args[i]);

        // load_file loads the file with this name into a string,
        // I imagine you can write a function to do this :)
        std::string js_file = load_file(*str);

        if(js_file.length() > 0) {
            Handle<String> source = String::New(js_file.c_str());
            Handle<Script> script = Script::Compile(source);
            return script->Run();
        }
    }
    return Undefined();
}

Handle<ObjectTemplate> global = ObjectTemplate::New();

global->Set(String::New("include"), FunctionTemplate::New(Include));

It basically adds a globally accessible function that can load and run a javascript file within the current context. I use it with my project, works like a dream.

// beginning of main javascript file
include("otherlib.js");

Answer 2

If you're using Node.js or any CommonsJS compliant runtime, you can use require(module); There's a nice article about it at http://jherdman.ca/2010-04-05/understanding-nodejs-require/