jsio bundler

jsio.js

var jsio = (function() {
  var util = {
    slice: Array.prototype.slice,
    bind: function bind(method, context) {
      var args = util.slice.call(arguments, 2);

      return function() {
        return method.apply(context, args.concat(util.slice.call(arguments, 0)));
      };
    }
  };

  function require(fromPath, item) {
    var moduleDef = loadModule(fromPath, item);

    if (!moduleDef.exports) {
      moduleDef.exports = {};
      fromPath = moduleDef.path;
      execModule(makeContext(fromPath), moduleDef);
    }
    return moduleDef.exports;
  }

  function setCache(cache) {
    jsio.__srcCache = cache;
  }

  function ModuleDef(path, src, exports) {
    this.path = path;
    this.src = src;
    this.exports = exports;
  }

  function loadModule(fromPath, path) {
    var srcCache = jsio.__srcCache,
      modules = jsio.__modules,
      cachedVersion;

    path = fromPath ? (srcCache[fromPath])[1][path] : path;
    cachedVersion = srcCache[path][0];

    if (cachedVersion) {
      if (!modules[path]) {
        modules[path] = new ModuleDef(path, cachedVersion);
      }

      return modules[path];
    }
  }

  function execModule(jsio, moduleDef) {
    var fn = moduleDef.src,
      exports = moduleDef.exports;

    fn.call(exports, jsio, moduleDef);
  }

  function makeContext(fromPath) {
    var jsio = util.bind(require, null, fromPath);

    jsio.setCache = setCache;
    jsio.__srcCache = {};
    jsio.__modules = {};

    return jsio;
  }

  return makeContext();
}());
jsio.setCache({
  "__tests__/test1/print.js": [(function(require, module) {
    module.exports = function(res) {
      console.log(res);
    };
  }), {

  }],
  "__tests__/test1/calculator.js": [(function(require, module) {
    var print = require('./print');

    module.exports = {

      add: function(a, b) {
        print(a + b);
      }
    };
  }), {
    "./print": "__tests__/test1/print.js"
  }],
  "__tests__/test1/app.js": [(function(require, module) {
    var calculator = require('./calculator');

    calculator.add(4, 5);
  }), {
    "./calculator": "__tests__/test1/calculator.js"
  }]
});
jsio('__tests__/test1/app.js');