gistfile1.js

var fs = require('fs'),
    step = require('step'),
    jsdom = require('jsdom'),
    window = jsdom.createWindow(),
    Script = process.binding('evals').Script;

window.document = {};
window.Ext = {data:{Record:{}}};

var fileNames = [
    'platform/src/Ext.js',
    'platform/src/util/Observable.js',
    'platform/src/util/Stateful.js',
    'platform/src/util/HashMap.js',
    'platform/src/util/MixedCollection.js',
    'platform/src/util/AbstractManager.js',
    'platform/src/util/DelayedTask.js',
    'platform/src/util/GeoLocation.js',
    'platform/src/util/Point.js',
    'platform/src/util/Offset.js',
    'platform/src/util/Region.js',
    'platform/src/util/Template.js',
    'platform/src/util/XTemplate.js',
    'platform/src/util/Sorter.js',
    'platform/src/util/Filter.js',
    'platform/src/util/Function.js',
    'platform/src/util/Date.js',
    'platform/src/util/Number.js',
    'platform/src/util/Format.js',
    'platform/src/util/LoadMask.js',

    // Platform Native

    'platform/src/native/Array.js',

    // Platform Core

    'platform/src/ComponentMgr.js',
    'platform/src/ComponentQuery.js',
    'platform/src/PluginMgr.js',
    'platform/src/EventManager.js',
    'platform/src/Support.js',

    // Platform MVC
    'core/History.js',
    'platform/src/app/ControllerManager.js',
    'platform/src/app/Controller.js',
    'platform/src/app/Dispatcher.js',
    'platform/src/app/Router.js',
    'platform/src/app/Route.js',
    'platform/src/app/Interaction.js',
    'platform/src/app/Application.js',
    'platform/src/app/ApplicationManager.js',

    // Data Foundation

    'platform/src/data/Batch.js',
    'platform/src/data/Model.js',
    'platform/src/data/Association.js',
    'platform/src/data/HasManyAssociation.js',
    'platform/src/data/BelongsToAssociation.js',
    'platform/src/data/PolymorphicAssociation.js',
    'platform/src/data/Validations.js',
    'platform/src/data/Errors.js',
    'platform/src/data/Field.js',
    'platform/src/data/SortTypes.js',
    'platform/src/data/Types.js',
    'platform/src/data/ModelMgr.js',
    'platform/src/data/Operation.js',
    'platform/src/data/ProxyMgr.js',
    'platform/src/data/ReaderMgr.js',
    'platform/src/data/Request.js',
    'platform/src/data/ResultSet.js',
    'platform/src/data/stores/AbstractStore.js',
    'platform/src/data/Store.js',
    'platform/src/data/stores/TreeStore.js',
    'platform/src/data/StoreMgr.js',
    'platform/src/data/WriterMgr.js',
    'platform/src/data/Tree.js',
    'platform/src/data/Node.js',
    'platform/src/data/proxies/Proxy.js',
    'platform/src/data/proxies/ServerProxy.js',
    'platform/src/data/proxies/AjaxProxy.js',
    'platform/src/data/proxies/RestProxy.js',
    'platform/src/data/proxies/ScriptTagProxy.js',
    'platform/src/data/proxies/ClientProxy.js',
    'platform/src/data/proxies/MemoryProxy.js',
    'platform/src/data/proxies/WebStorageProxy.js',
    'platform/src/data/proxies/LocalStorageProxy.js',
    'platform/src/data/proxies/SessionStorageProxy.js',
    'platform/src/data/readers/Reader.js',
    'platform/src/data/writers/Writer.js',

    // Data - Json

    'platform/src/data/writers/JsonWriter.js',
    'platform/src/data/readers/JsonReader.js',
    'platform/src/data/readers/TreeReader.js',
    'platform/src/data/readers/ArrayReader.js',
    'platform/src/data/stores/ArrayStore.js',
    'platform/src/data/stores/JsonStore.js',
    'platform/src/data/stores/JsonPStore.js',

    // Data - XML

    'platform/src/data/writers/XmlWriter.js',
    'platform/src/data/readers/XmlReader.js',
    'platform/src/data/stores/XmlStore.js'
];

step(
    function () {
        var group = this.group();
        fileNames.forEach(function (fileName) {
            fs.readFile(fileName, 'utf8', group());
        });
    },
    function (err, fileBodies) {
        if (err) {
            console.log("Error: " + err);
            process.exit();
        }
        fileBodies.forEach(function (fileBody, i) {
            console.log("Evaling " + fileNames[i]);
            Script.runInNewContext(fileBody, window);
        });
        console.log("The Ext object = " + require('sys').inspect(window.Ext));
    }
);

Synchronous version: Replace the entire step(...) construct with this:

fileNames.forEach(function (fileName) {
    Script.runInNewContext(fs.readFileSync(fileName, 'utf8'), window);
});

console.log("The Ext object = " + require('sys').inspect(window.Ext));

The synchronous version would allow you to export the Ext object by adding this at the bottom:

exports.Ext = window.Ext;

TY ;)