system/boilerplate.js

Flexible module and resource system

/*eslint semi:[0], no-native-reassign:[0]*/
global = this;
(function (modules) {

    // Bundle allows the run-time to extract already-loaded modules from the
    // boot bundle.
    var bundle = {};
    var main;

    // Unpack module tuples into module objects.
    for (var i = 0; i < modules.length; i++) {
        var module = modules[i];
        module = modules[i] = new Module(
            module[0],
            module[1],
            module[2],
            module[3],
            module[4]
        );
        bundle[module.filename] = module;
    }

    function Module(id, dirname, basename, dependencies, factory) {
        this.id = id;
        this.dirname = dirname;
        this.filename = dirname + "/" + basename;
        // Dependency map and factory are used to instantiate bundled modules.
        this.dependencies = dependencies;
        this.factory = factory;
    }

    Module.prototype._require = function () {
        var module = this;
        if (module.exports === void 0) {
            module.exports = {};
            var require = function (id) {
                var index = module.dependencies[id];
                var dependency = modules[index];
                if (!dependency)
                    throw new Error("Bundle is missing a dependency: " + id);
                return dependency._require();
            };
            require.main = main;
            module.exports = module.factory(
                require,
                module.exports,
                module,
                module.filename,
                module.dirname
            ) || module.exports;
        }
        return module.exports;
    };

    // Communicate the bundle to all bundled modules
    Module.prototype.modules = bundle;

    return function require(filename) {
        main = bundle[filename];
        main._require();
    }
})