main.js

(function(global){

	// helpers
	var camelize = function(str){
		return str.replace(/-+(.)?/g, function(match, chr){
			return chr ? chr.toUpperCase() : ''
		});
	},
		each = function( o, cb){
			var i, len;

			// weak array detection, but we only use this internally so don't
			// pass it weird stuff
			if ( typeof o.length == 'number' && (o.length - 1) in o) {
				for ( i = 0, len = o.length; i < len; i++ ) {
					cb.call(o[i], o[i], i, o);
				}
			} else {
				for ( i in o ) {
					if(o.hasOwnProperty(i)){
						cb.call(o[i], o[i], i, o);
					}
				}
			}
			return o;
		},
		map = function(o, cb) {
			var arr = [];
			each(o, function(item, i){
				arr[i] = cb(item, i);
			});
			return arr;
		},
		isString = function(o) {
			return typeof o == "string";
		},
		extend = function(d,s){
			each(s, function(v, p){
				d[p] = v;
			});
			return d;
		},
		dir = function(uri){
			var lastSlash = uri.lastIndexOf("/");
			//if no / slashes, check for \ slashes since it might be a windows path
			if(lastSlash === -1)
				lastSlash = uri.lastIndexOf("\\");
			if(lastSlash !== -1) {
				return uri.substr(0, lastSlash);
			} else {
				return uri;
			}
		},
		last = function(arr){
			return arr[arr.length - 1];
		},
		parseURI = function(url) {
			var m = String(url).replace(/^\s+|\s+$/g, '').match(/^([^:\/?#]+:)?(\/\/(?:[^:@]*(?::[^:@]*)?@)?(([^:\/?#]*)(?::(\d*))?))?([^?#]*)(\?[^#]*)?(#[\s\S]*)?/);
				// authority = '//' + user + ':' + pass '@' + hostname + ':' port
				return (m ? {
				href     : m[0] || '',
				protocol : m[1] || '',
				authority: m[2] || '',
				host     : m[3] || '',
				hostname : m[4] || '',
				port     : m[5] || '',
				pathname : m[6] || '',
				search   : m[7] || '',
				hash     : m[8] || ''
			} : null);
		},
		joinURIs = function(base, href) {
			function removeDotSegments(input) {
				var output = [];
				input.replace(/^(\.\.?(\/|$))+/, '')
					.replace(/\/(\.(\/|$))+/g, '/')
					.replace(/\/\.\.$/, '/../')
					.replace(/\/?[^\/]*/g, function (p) {
						if (p === '/..') {
							output.pop();
						} else {
							output.push(p);
						}
					});
				return output.join('').replace(/^\//, input.charAt(0) === '/' ? '/' : '');
			}

			href = parseURI(href || '');
			base = parseURI(base || '');

			return !href || !base ? null : (href.protocol || base.protocol) +
				(href.protocol || href.authority ? href.authority : base.authority) +
				removeDotSegments(href.protocol || href.authority || href.pathname.charAt(0) === '/' ? href.pathname : (href.pathname ? ((base.authority && !base.pathname ? '/' : '') + base.pathname.slice(0, base.pathname.lastIndexOf('/') + 1) + href.pathname) : base.pathname)) +
					(href.protocol || href.authority || href.pathname ? href.search : (href.search || base.search)) +
					href.hash;
		},
		relativeURI = function(base, path) {
			var uriParts = path.split("/"),
				baseParts = base.split("/"),
				result = [];
			while ( uriParts.length && baseParts.length && uriParts[0] == baseParts[0] ) {
				uriParts.shift();
				baseParts.shift();
			}
			for(var i = 0 ; i< baseParts.length-1; i++) {
				result.push("../");
			}
			return "./" + result.join("") + uriParts.join("/");
		};
		isWebWorker = typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope,
		isNode = typeof process === "object" && {}.toString.call(process) === "[object process]",
		isBrowserWithWindow = !isNode && typeof window !== "undefined";

	var filename = function(uri){
		var lastSlash = uri.lastIndexOf("/");
		//if no / slashes, check for \ slashes since it might be a windows path
		if(lastSlash === -1)
			lastSlash = uri.lastIndexOf("\\");
		var matches = ( lastSlash == -1 ? uri : uri.substr(lastSlash+1) ).match(/^[\w-\s\.!]+/);
		return matches ? matches[0] : "";
	};
	
	var ext = function(uri){
		var fn = filename(uri);
		var dot = fn.lastIndexOf(".");
		if(dot !== -1) {
			return fn.substr(dot+1);
		} else {
			return "";
		}
	};

	var pluginCache = {};
	
	var normalize = function(name, loader){

		// Detech if this name contains a plugin part like: app.less!steal/less
		// and catch the plugin name so that when it is normalized we do not perform
		// Steal's normalization against it.
		var pluginIndex = name.lastIndexOf('!');
		var pluginPart = "";
		if (pluginIndex != -1) {
			// argumentName is the part before the !
			var argumentName = name.substr(0, pluginIndex);
			var pluginName = name.substr(pluginIndex + 1);
			pluginPart = "!" + pluginName;

			// Set the name to the argument name so that we can normalize it alone.
			name = argumentName;
		} 
		
		var last = filename(name),
			extension = ext(name);
		// if the name ends with /
		if(	name[name.length -1] === "/" ) {
			return name+filename( name.substr(0, name.length-1) ) + pluginPart;
		} else if(	!/^(\w+(?:s)?:\/\/|\.|file|\/)/.test(name) &&
			// and doesn't end with a dot
			 last.indexOf(".") === -1 
			) {
			return name+"/"+last + pluginPart;
		} else {
			if(extension === "js") {
				return name.substr(0, name.lastIndexOf(".")) + pluginPart;
			} else {
				return name + pluginPart;
			}
		}
	};

var cloneSteal = function(System){
	var loader = System || this.System;
	return makeSteal(this.addSteal(loader.clone()));
};

var makeSteal = function(System){

	System.set('@loader', System.newModule({'default':System, __useDefault: true}));
	System.config({
		map: {
			"@loader/@loader": "@loader",
			"@steal/@steal": "@steal"
		}
	});

	var configDeferred,
		devDeferred,
		appDeferred;

	var steal = function(){
		var args = arguments;
		var afterConfig = function(){
			var imports = [];
			var factory;
			each(args, function(arg){
				if(isString(arg)) {
					imports.push( steal.System['import']( normalize(arg) ) );
				} else if(typeof arg === "function") {
					factory = arg;
				}
			});

			var modules = Promise.all(imports);
			if(factory) {
				return modules.then(function(modules) {
			        return factory && factory.apply(null, modules);
			   });
			} else {
				return modules;
			}
		};
		if(System.isEnv("production")) {
			return afterConfig();
		} else {
			// wait until the config has loaded
			return configDeferred.then(afterConfig,afterConfig);
		}

	};

	System.set("@steal", System.newModule({"default":steal, __useDefault:true}));

	steal.System = System;
	steal.parseURI = parseURI;
	steal.joinURIs = joinURIs;
	steal.normalize = normalize;
	steal.relativeURI = relativeURI;

	// System.ext = {bar: "path/to/bar"}
	// foo.bar! -> foo.bar!path/to/bar
	var addExt = function(loader) {
		if (loader._extensions) {
			loader._extensions.push(addExt);
		}

		loader.ext = {};

		var normalize = loader.normalize,
			endingExtension = /\.(\w+)!?$/;

		loader.normalize = function(name, parentName, parentAddress, pluginNormalize){
			if(pluginNormalize) {
				return normalize.apply(this, arguments);
			}

			var matches = name.match(endingExtension),
				ext,
				newName = name;

			if(matches && loader.ext[ext = matches[1]]) {
				var hasBang = name[name.length - 1] === "!";
				newName = name + (hasBang ? "" : "!") + loader.ext[ext];
			}
			return normalize.call(this, newName, parentName, parentAddress);
		};
	};

	if(typeof System){
		addExt(System);
	}



	// "path/to/folder/" -> "path/to/folder/folder"
	var addForwardSlash = function(loader) {
		if (loader._extensions) {
			loader._extensions.push(addForwardSlash);
		}

		var normalize = loader.normalize;
		var npmLike = /@.+#.+/;

		loader.normalize = function(name, parentName, parentAddress, pluginNormalize) {
			var lastPos = name.length - 1,
				secondToLast,
				folderName;

			if (name[lastPos] === "/") {
				secondToLast = name.substring(0, lastPos).lastIndexOf("/");
				folderName = name.substring(secondToLast + 1, lastPos);
				if(npmLike.test(folderName)) {
					folderName = folderName.substr(folderName.lastIndexOf("#") + 1);
				}

				name += folderName;
			}
			return normalize.call(this, name, parentName, parentAddress, pluginNormalize);
		};
	};

	if (typeof System) {
		addForwardSlash(System);
	}

// override loader.translate to rewrite 'locate://' & 'pkg://' path schemes found
// in resources loaded by supporting plugins

var addLocate = function(loader){
	/**
	 * @hide
	 * @function normalizeAndLocate
	 * @description Run a module identifier through Normalize and Locate hooks.
	 * @param {String} moduleName The module to run through normalize and locate.
	 * @return {Promise} A promise to resolve when the address is found.
	 */
	var normalizeAndLocate = function(moduleName, parentName){
		var loader = this;
		return Promise.resolve(loader.normalize(moduleName, parentName))
			.then(function(name){
				return loader.locate({name: name, metadata: {}});
			}).then(function(address){
				if(address.substr(address.length - 3) === ".js") {
					address = address.substr(0, address.length - 3);
				}
				return address;
			});
	};

	var relative = function(base, path){
		var uriParts = path.split("/"),
			baseParts = base.split("/"),
			result = [];

		while ( uriParts.length && baseParts.length && uriParts[0] == baseParts[0] ) {
			uriParts.shift();
			baseParts.shift();
		}

		for(var i = 0 ; i< baseParts.length-1; i++) {
			result.push("../");
		}

		return result.join("") + uriParts.join("/");
	};

	var schemePattern = /(locate):\/\/([a-z0-9/._@-]*)/ig,
		parsePathSchemes = function(source, parent) {
			var locations = [];
			source.replace(schemePattern, function(whole, scheme, path, index){
				locations.push({
					start: index,
					end: index+whole.length,
					name: path,
					postLocate: function(address){
						return relative(parent, address);
					}
				});
			});
			return locations;
		};

	var _translate = loader.translate;
	loader.translate = function(load){
		var loader = this;

		// This only applies to plugin resources.
		if(!load.metadata.plugin) {
			return _translate.call(this, load);
		}

		// Use the translator if this file path scheme is supported by the plugin
		var locateSupport = load.metadata.plugin.locateScheme;
		if(!locateSupport) {
			return _translate.call(this, load);
		}

		// Parse array of module names
		var locations = parsePathSchemes(load.source, load.address);

		// no locations found
		if(!locations.length) {
			return _translate.call(this, load);
		}

		// normalize and locate all of the modules found and then replace those instances in the source.
		var promises = [];
		for(var i = 0, len = locations.length; i < len; i++) {
			promises.push(
				normalizeAndLocate.call(this, locations[i].name, load.name)
			);
		}
		return Promise.all(promises).then(function(addresses){
			for(var i = locations.length - 1; i >= 0; i--) {
				load.source = load.source.substr(0, locations[i].start)
					+ locations[i].postLocate(addresses[i])
					+ load.source.substr(locations[i].end, load.source.length);
			}
			return _translate.call(loader, load);
		});
	};
};

if(typeof System !== "undefined") {
	addLocate(System);
}

function addContextual(loader){
  if (loader._extensions) {
    loader._extensions.push(addContextual);
  }
  loader._contextualModules = {};

  loader.setContextual = function(moduleName, definer){
    this._contextualModules[moduleName] = definer;
  };

  var normalize = loader.normalize;
  loader.normalize = function(name, parentName){
    var loader = this;

    if (parentName) {
      var definer = this._contextualModules[name];

      // See if `name` is a contextual module
      if (definer) {
        name = name + '/' + parentName;

        if(!loader.has(name)) {
          // `definer` could be a function or could be a moduleName
          if (typeof definer === 'string') {
            definer = loader['import'](definer);
          }

          return Promise.resolve(definer)
          .then(function(definer) {
            if (definer['default']) {
              definer = definer['default'];
            }
            loader.set(name, loader.newModule(definer.call(loader, parentName)));
            return name;
          });
        }
        return Promise.resolve(name);
      }
    }

    return normalize.apply(this, arguments);
  };
}

if(typeof System !== "undefined") {
  addContextual(System);
}

function applyTraceExtension(loader){
	if(loader._extensions) {
		loader._extensions.push(applyTraceExtension);
	}

	loader._traceData = {
		loads: {},
		parentMap: {}
	};

	loader.getDependencies = function(moduleName){
		var load = this.getModuleLoad(moduleName);
		return load ? load.metadata.dependencies : undefined;
	};
	loader.getDependants = function(moduleName){
		var deps = [];
		var pars = this._traceData.parentMap[moduleName] || {};
		eachOf(pars, function(name) { deps.push(name); });
		return deps;
	};
	loader.getModuleLoad = function(moduleName){
		return this._traceData.loads[moduleName];
	};
	loader.getBundles = function(moduleName, visited){
		visited = visited || {};
		visited[moduleName] = true;
		var loader = this;
		var parentMap = loader._traceData.parentMap;
		var parents = parentMap[moduleName];
		if(!parents) return [moduleName];

		var bundles = [];
		eachOf(parents, function(parentName, value){
			if(!visited[parentName])
				bundles = bundles.concat(loader.getBundles(parentName, visited));
		});
		return bundles;
	};
	loader._allowModuleExecution = {};
	loader.allowModuleExecution = function(name){
		var loader = this;
		return loader.normalize(name).then(function(name){
			loader._allowModuleExecution[name] = true;
		});
	};

	function eachOf(obj, callback){
		var name, val;
		for(name in obj) {
			callback(name, obj[name]);
		}
	}

	var normalize = loader.normalize;
	loader.normalize = function(name, parentName){
		var normalizePromise = normalize.apply(this, arguments);

		if(parentName) {
			var parentMap = this._traceData.parentMap;
			return normalizePromise.then(function(name){
				if(!parentMap[name]) {
					parentMap[name] = {};
				}
				parentMap[name][parentName] = true;
				return name;
			});
		}

		return normalizePromise;
	};

	var emptyExecute = function(){
		return loader.newModule({});
	};


	var passThroughModules = {
		traceur: true,
		babel: true
	};
	var isAllowedToExecute = function(load){
		return passThroughModules[load.name] || this._allowModuleExecution[load.name];
	};

	var map = [].map || function(callback){
		var res = [];
		for(var i = 0, len = this.length; i < len; i++) {
			res.push(callback(this[i]));
		}
		return res;
	};

	var esImportDepsExp = /import .*["'](.+)["']/g;
	var esExportDepsExp = /export .+ from ["'](.+)["']/g;
	var commentRegEx = /(^|[^\\])(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;
	var stringRegEx = /(?:("|')[^\1\\\n\r]*(?:\\.[^\1\\\n\r]*)*\1|`[^`]*`)/g;

	function getESDeps(source) {
		esImportDepsExp.lastIndex = commentRegEx.lastIndex =
			esExportDepsExp.lastIndex = stringRegEx.lastIndex = 0;

		var deps = [];

		var match;

		// track string and comment locations for unminified source
		var stringLocations = [], commentLocations = [];

		function inLocation(locations, match) {
		  for (var i = 0; i < locations.length; i++)
			if (locations[i][0] < match.index && locations[i][1] > match.index)
			  return true;
		  return false;
		}

		function addDeps(exp) {
			while (match = exp.exec(source)) {
			  // ensure we're not within a string or comment location
			  if (!inLocation(stringLocations, match) && !inLocation(commentLocations, match)) {
				var dep = match[1];//.substr(1, match[1].length - 2);
				deps.push(dep);
			  }
			}
		}

		if (source.length / source.split('\n').length < 200) {
		  while (match = stringRegEx.exec(source))
			stringLocations.push([match.index, match.index + match[0].length]);

		  while (match = commentRegEx.exec(source)) {
			// only track comments not starting in strings
			if (!inLocation(stringLocations, match))
			  commentLocations.push([match.index, match.index + match[0].length]);
		  }
		}

		addDeps(esImportDepsExp);
		addDeps(esExportDepsExp);

		return deps;
	}

	var instantiate = loader.instantiate;
	loader.instantiate = function(load){
		this._traceData.loads[load.name] = load;
		var loader = this;
		var instantiatePromise = Promise.resolve(instantiate.apply(this, arguments));

		function finalizeResult(result){
			var preventExecution = loader.preventModuleExecution &&
				!isAllowedToExecute.call(loader, load);

			// deps either comes from the instantiate result, or if an
			// es6 module it was found in the transpile hook.
			var deps = result ? result.deps : load.metadata.deps;

			return Promise.all(map.call(deps, function(depName){
				return loader.normalize(depName, load.name);
			})).then(function(dependencies){
				load.metadata.deps = deps;
				load.metadata.dependencies = dependencies;

				if(preventExecution) {
					return {
						deps: deps,
						execute: emptyExecute
					};
				}

				return result;

			});
		}

		return instantiatePromise.then(function(result){
			// This must be es6
			if(!result) {
				var deps = getESDeps(load.source);
				load.metadata.deps = deps;
			}
			return finalizeResult(result);
		});
	};

	var transpile = loader.transpile;
	// Allow transpile to be memoized, but only once
	loader.transpile = function(load){
		var transpiled = load.metadata.transpiledSource;
		if(transpiled) {
			delete load.metadata.transpiledSource;
			return Promise.resolve(transpiled);
		}
		return transpile.apply(this, arguments);
	};

	loader.eachModule = function(cb){
		for (var moduleName in this._loader.modules) {
			cb.call(this, moduleName, this.get(moduleName));
		}
	};
}

if(typeof System !== "undefined") {
	applyTraceExtension(System);
}

	// Overwrites System.config with setter hooks
	var setterConfig = function(loader, configSpecial){
		var oldConfig = loader.config;

		loader.config =  function(cfg){

			var data = extend({},cfg);
			// check each special
			each(configSpecial, function(special, name){
				// if there is a setter and a value
				if(special.set && data[name]){
					// call the setter
					var res = special.set.call(loader,data[name], cfg);
					// if the setter returns a value
					if(res !== undefined) {
						// set that on the loader
						loader[name] = res;
					}
					// delete the property b/c setting is done
					delete data[name];
				}
			});
			oldConfig.call(this, data);
		};
	};

	var setIfNotPresent = function(obj, prop, value){
		if(!obj[prop]) {
			obj[prop] = value;
		}
	};

	// steal.js's default configuration values
	System.configMain = "@config";
	System.paths[System.configMain] = "stealconfig.js";
	System.env = (isWebWorker ? "worker" : "window") + "-development";
	System.ext = {
		css: '$css',
		less: '$less'
	};
	System.logLevel = 0;
	System.transpiler = "traceur";
	var cssBundlesNameGlob = "bundles/*.css",
		jsBundlesNameGlob = "bundles/*";
	setIfNotPresent(System.paths,cssBundlesNameGlob, "dist/bundles/*css");
	setIfNotPresent(System.paths,jsBundlesNameGlob, "dist/bundles/*.js");

	var configSetter = {
		set: function(val){
			var name = filename(val),
				root = dir(val);

			if(!isNode) {
				System.configPath = joinURIs( location.href, val);
			}
			System.configMain = name;
			System.paths[name] = name;
			addProductionBundles.call(this);
			this.config({ baseURL: (root === val ? "." : root) + "/" });
		}
	},
		mainSetter = {
			set: function(val){
				this.main = val;
				addProductionBundles.call(this);
			}
		};

	// checks if we're running in node, then prepends the "file:" protocol if we are
	var envPath = function(val) {
		if(isNode && !/^file:/.test(val)) {
			// If relative join with the current working directory
			if(val[0] === "." && (val[1] === "/" ||
								 (val[1] === "." && val[2] === "/"))) {
				val = require("path").join(process.cwd(), val);
			}
			if(!val) return val;

			return "file:" + val;
		}
		return val;
	};

	var fileSetter = function(prop) {
		return {
			set: function(val) {
				this[prop] = envPath(val);
			}
		};
	};

	var setToSystem = function(prop){
		return {
			set: function(val){
				if(typeof val === "object" && typeof steal.System[prop] === "object") {
					this[prop] = extend(this[prop] || {},val || {});
				} else {
					this[prop] = val;
				}
			}
		};
	};

	var pluginPart = function(name) {
		var bang = name.lastIndexOf("!");
		if(bang !== -1) {
			return name.substr(bang+1);
		}
	};
	var pluginResource = function(name){
		var bang = name.lastIndexOf("!");
		if(bang !== -1) {
			return name.substr(0, bang);
		}
	};

	var addProductionBundles = function(){
		if(this.loadBundles && this.main) {
			var main = this.main,
				bundlesDir = this.bundlesName || "bundles/",
				mainBundleName = bundlesDir+main;

			setIfNotPresent(this.meta, mainBundleName, {format:"amd"});

			// If the configMain has a plugin like package.json!npm,
			// plugin has to be defined prior to importing.
			var plugin = pluginPart(System.configMain);
			var bundle = [main, System.configMain];
			if(plugin){
				System.set(plugin, System.newModule({}));
			}
			plugin = pluginPart(main);
			if(plugin) {
				var resource = pluginResource(main);
				bundle.push(plugin);
				bundle.push(resource);

				mainBundleName = bundlesDir+resource.substr(0, resource.indexOf("."));
			}

			this.bundles[mainBundleName] = bundle;
		}
	};

	var setEnvsConfig = function(){
		if(this.envs) {
			var envConfig = this.envs[this.env];
			if(envConfig) {
				this.config(envConfig);
			}
		}
	};

	var setupLiveReload = function(){
		if(this.liveReloadInstalled) {
			var loader = this;
			this.import("live-reload", { name: "@@steal" }).then(function(reload){
				reload(loader.configMain, function(){
					setEnvsConfig.call(loader);
				});
			});
		}
	};

	var specialConfig;
	var envsSpecial = { map: true, paths: true, meta: true };
	setterConfig(System, specialConfig = {
		env: {
			set: function(val){
				this.env = val;

				if(this.isEnv("production")) {
					this.loadBundles = true;
				}

				addProductionBundles.call(this);
			}
		},
		envs: {
			set: function(val){
				// envs should be set, deep
				var envs = this.envs;
				if(!envs) envs = this.envs = {};
				each(val, function(cfg, name){
					var env = envs[name];
					if(!env) env = envs[name] = {};

					each(cfg, function(val, name){
						if(envsSpecial[name] && env[name]) {
							extend(env[name], val);
						} else {
							env[name] = val;
						}
					});

					//extend(env, cfg);
				});
			}
		},
		baseUrl: fileSetter("baseURL"),
		baseURL: fileSetter("baseURL"),
		root: fileSetter("baseURL"),  //backwards comp
		config: configSetter,
		configPath: configSetter,
		loadBundles: {
			set: function(val){
				this.loadBundles = val;
				addProductionBundles.call(this);
			}
		},
		startId: {
			set: function(val){
				mainSetter.set.call(this, normalize(val) );
			}
		},
		main: mainSetter,
		stealURL: {
			// http://domain.com/steal/steal.js?moduleName,env&
			set: function(url, cfg)	{
				System.stealURL = url;
				var urlParts = url.split("?");

				var path = urlParts.shift(),
					search = urlParts.join("?"),
					searchParts = search.split("&"),
					paths = path.split("/"),
					lastPart = paths.pop(),
					stealPath = paths.join("/"),
					platform = this.getPlatform() || (isWebWorker ? "worker" : "window");

				// if steal is bundled we always are in production environment
				if(this.stealBundled && this.stealBundled === true) {
					this.config({ env: platform+"-production" });

				}else{
					specialConfig.stealPath.set.call(this,stealPath, cfg);

					if (lastPart.indexOf("steal.production") > -1 && !cfg.env) {
						this.config({ env: platform+"-production" });
						addProductionBundles.call(this);
					}
				}

				if(searchParts.length && searchParts[0].length) {
					var searchConfig = {},
						searchPart;
					for(var i =0; i < searchParts.length; i++) {
						searchPart = searchParts[i];
						var paramParts = searchPart.split("=");
						if(paramParts.length > 1) {
							searchConfig[paramParts[0]] = paramParts.slice(1).join("=");
						} else {
							if(steal.dev) {
								steal.dev.warn("Please use search params like ?main=main&env=production");
							}
							var oldParamParts = searchPart.split(",");
							if (oldParamParts[0]) {
								searchConfig.startId = oldParamParts[0];
							}
							if (oldParamParts[1]) {
								searchConfig.env = oldParamParts[1];
							}
						}
					}
					this.config(searchConfig);
				}

				// Split on / to get rootUrl

			}
		},
		// this gets called with the __dirname steal is in
		stealPath: {
			set: function(dirname, cfg) {
				dirname = envPath(dirname);
				var parts = dirname.split("/");

				// steal keeps this around to make things easy no matter how you are using it.
				setIfNotPresent(this.paths,"@dev", dirname+"/ext/dev.js");
				setIfNotPresent(this.paths,"$css", dirname+"/ext/css.js");
				setIfNotPresent(this.paths,"$less", dirname+"/ext/less.js");
				setIfNotPresent(this.paths,"@less-engine", dirname+"/ext/less-engine.js");
				setIfNotPresent(this.paths,"npm", dirname+"/ext/npm.js");
				setIfNotPresent(this.paths,"npm-extension", dirname+"/ext/npm-extension.js");
				setIfNotPresent(this.paths,"npm-utils", dirname+"/ext/npm-utils.js");
				setIfNotPresent(this.paths,"npm-crawl", dirname+"/ext/npm-crawl.js");
				setIfNotPresent(this.paths,"npm-load", dirname+"/ext/npm-load.js");
				setIfNotPresent(this.paths,"npm-convert", dirname+"/ext/npm-convert.js");
				setIfNotPresent(this.paths,"semver", dirname+"/ext/semver.js");
				setIfNotPresent(this.paths,"bower", dirname+"/ext/bower.js");
				setIfNotPresent(this.paths,"live-reload", dirname+"/ext/live-reload.js");
				setIfNotPresent(this.paths,"steal-clone", dirname+"/ext/steal-clone.js");
				this.paths["traceur"] = dirname+"/ext/traceur.js";
				this.paths["traceur-runtime"] = dirname+"/ext/traceur-runtime.js";
				this.paths["babel"] = dirname+"/ext/babel.js";
				this.paths["babel-runtime"] = dirname+"/ext/babel-runtime.js";

				// steal-clone is contextual so it can override modules using relative paths
				this.setContextual('steal-clone', 'steal-clone');

				if(isNode) {
					System.register("@less-engine", [], false, function(){
						var r = require;
						return r('less');
					});

					if(this.configMain === "@config" && last(parts) === "steal") {
						parts.pop();
						if(last(parts) === "node_modules") {
							this.configMain = "package.json!npm";
							addProductionBundles.call(this);
							parts.pop();
						}
					}

				} else {
					setIfNotPresent(this.paths, "@less-engine", dirname + "/ext/less-engine.js");

					// make sure we don't set baseURL if something else is going to set it
					if(!cfg.root && !cfg.baseUrl && !cfg.baseURL && !cfg.config && !cfg.configPath) {
						if ( last(parts) === "steal" ) {
							parts.pop();
							if ( last(parts) === "bower_components" ) {
								System.configMain = "bower.json!bower";
								addProductionBundles.call(this);
								parts.pop();
							}
							if (last(parts) === "node_modules") {
								System.configMain = "package.json!npm";
								addProductionBundles.call(this);
								parts.pop();
							}
						}
						this.config({ baseURL: parts.join("/")+"/"});
					}
				}
				System.stealPath = dirname;
			}
		},
		// System.config does not like being passed arrays.
		bundle: {
			set: function(val){
				System.bundle = val;
			}
		},
		bundlesPath: {
			set: function(val){
				this.paths[cssBundlesNameGlob] = val+"/*css";
				this.paths[jsBundlesNameGlob]  = val+"/*.js";
				return val;
			}
		},
		instantiated: {
			set: function(val){
				var loader = this;

				each(val || {}, function(value, name){
					loader.set(name,  loader.newModule(value));
				});
			}
		},
		meta: {
			set: function(cfg){
				var loader = this;
				each(cfg || {}, function(value, name){
					if(typeof value !== "object") {
						return;
					}
					var cur = loader.meta[name];
					if(cur && cur.format === value.format) {
						// Keep the deps, if we have any
						var deps = value.deps;
						extend(value, cur);
						if(deps) {
							value.deps = deps;
						}
					}
				});
				extend(this.meta, cfg);
			}
		}
	});

	steal.config = function(cfg){
		if(typeof cfg === "string") {
			return System[cfg];
		} else {
			System.config(cfg);
		}
	};

if(typeof System !== "undefined") {
	addEnv(System);
}

function addEnv(loader){
	// Add the extension to _extensions so that it can be cloned.
	loader._extensions.push(addEnv);

	loader.getEnv = function(){
		var envParts = (this.env || "").split("-");
		// Fallback to this.env for legacy
		return envParts[1] || this.env;
	};
	loader.getPlatform = function(){
		var envParts = (this.env || "").split("-");
		return envParts.length === 2 ? envParts[0] : undefined;
	};

	loader.isEnv = function(name){
		return this.getEnv() === name;
	};

	loader.isPlatform = function(name){
		return this.getPlatform() === name;
	};
}

	var getScriptOptions = function () {

		var options = {},
			parts, src, query, startFile, env,
			scripts = document.getElementsByTagName("script");

		var script = scripts[scripts.length - 1];

		if (script) {
			options.stealURL = script.src;
			// Split on question mark to get query

			each(script.attributes, function(attr){
				var optionName =
					camelize( attr.nodeName.indexOf("data-") === 0 ?
						attr.nodeName.replace("data-","") :
						attr.nodeName );
				options[optionName] = (attr.value === "") ? true : attr.value;
			});

			var source = script.innerHTML;
			if(/\S/.test(source)){
				options.mainSource = source;
			}
		}

		return options;
	};

	steal.startup = function(config){

		// Get options from the script tag
		if (isWebWorker) {
			var urlOptions = {
				stealURL: location.href
			};
		} else if(isBrowserWithWindow) {
			var urlOptions = getScriptOptions();
		} else {
			// or the only option is where steal is.
			var urlOptions = {
				stealPath: __dirname
			};
		}

		// first set the config that is set with a steal object
		if(config){
			System.config(config);
		}

		// B: DO THINGS WITH OPTIONS
		// CALCULATE CURRENT LOCATION OF THINGS ...
		System.config(urlOptions);


		setEnvsConfig.call(this.System);

		// Read the env now because we can't overwrite everything yet

		// immediate steals we do
		var steals = [];

		// we only load things with force = true
		if ( System.loadBundles ) {

			if(!System.main && System.isEnv("production") && !System.stealBundled) {
				// prevent this warning from being removed by Uglify
				var warn = console && console.warn || function() {};
				warn.call(console, "Attribute 'main' is required in production environment. Please add it to the script tag.");
			}

			configDeferred = System["import"](System.configMain);

			appDeferred = configDeferred.then(function(cfg){
				setEnvsConfig.call(System);
				return System.main ? System["import"](System.main) : cfg;
			});

		} else {
			configDeferred = System["import"](System.configMain);

			devDeferred = configDeferred.then(function(){
				setEnvsConfig.call(System);
				setupLiveReload.call(System);

				// If a configuration was passed to startup we'll use that to overwrite
				// what was loaded in stealconfig.js
				// This means we call it twice, but that's ok
				if(config) {
					System.config(config);
				}

				return System["import"]("@dev");
			},function(e){
				console.log("steal - error loading @config.",e);
				return steal.System["import"]("@dev");
			});

			appDeferred = devDeferred.then(function(){
				// if there's a main, get it, otherwise, we are just loading
				// the config.
				if(!System.main || System.env === "build") {
					return configDeferred;
				}
				var main = System.main;
				if(typeof main === "string") {
					main = [main];
				}
				return Promise.all( map(main,function(main){
					return System["import"](main);
				}) );
			});

		}

		if(System.mainSource) {
			appDeferred = appDeferred.then(function(){
				System.module(System.mainSource);
			});
		}
		return appDeferred;
	};
	steal.done = function(){
		return appDeferred;
	};

	steal["import"] = function(){
		var names = arguments;
		var loader = this.System;

		function afterConfig(){
			var imports = [];
			each(names, function(name){
				imports.push(loader["import"](name));
			});
			if(imports.length > 1) {
				return Promise.all(imports);
			} else {
				return imports[0];
			}
		}

		if(!configDeferred) {
			steal.startup();
		}

		return configDeferred.then(afterConfig);
	};
	return steal;

};
/*
  SystemJS Steal Format
  Provides the Steal module format definition.
*/
function addSteal(loader) {
	if (loader._extensions) {
		loader._extensions.push(addSteal);
	}

  // Steal Module Format Detection RegEx
  // steal(module, ...)
  var stealRegEx = /(?:^\s*|[}{\(\);,\n\?\&]\s*)steal\s*\(\s*((?:"[^"]+"\s*,|'[^']+'\s*,\s*)*)/;

  // What we stole.
  var stealInstantiateResult;
  
  function createSteal(loader) {
    stealInstantiateResult = null;

    // ensure no NodeJS environment detection
    loader.global.module = undefined;
    loader.global.exports = undefined;

    function steal() {
      var deps = [];
      var factory;
      
      for( var i = 0; i < arguments.length; i++ ) {
        if (typeof arguments[i] === 'string') {
          deps.push( normalize(arguments[i]) );
        } else {
          factory = arguments[i];
        }
      }

      if (typeof factory !== 'function') {
        factory = (function(factory) {
          return function() { return factory; };
        })(factory);
      }

      stealInstantiateResult = {
        deps: deps,
        execute: function(require, exports, moduleName) {

          var depValues = [];
          for (var i = 0; i < deps.length; i++) {
            depValues.push(require(deps[i]));
          }

          var output = factory.apply(loader.global, depValues);

          if (typeof output !== 'undefined') {
            return output;
          }
        }
      };
    }

    loader.global.steal = steal;
  }

  var loaderInstantiate = loader.instantiate;
  loader.instantiate = function(load) {
    var loader = this;

    if (load.metadata.format === 'steal' || !load.metadata.format && load.source.match(stealRegEx)) {
      load.metadata.format = 'steal';

      var oldSteal = loader.global.steal;

      createSteal(loader);

      loader.__exec(load);

      loader.global.steal = oldSteal;

      if (!stealInstantiateResult) {
        throw "Steal module " + load.name + " did not call steal";
      }

      if (stealInstantiateResult) {
        load.metadata.deps = load.metadata.deps ? load.metadata.deps.concat(stealInstantiateResult.deps) : stealInstantiateResult.deps;
        load.metadata.execute = stealInstantiateResult.execute;
      }
    }
    return loaderInstantiate.call(loader, load);
  };

  return loader;
}

if (typeof System !== "undefined") {
  addSteal(System);
}

	if( isNode ) {
		require('steal-systemjs');

		global.steal = makeSteal(System);
		global.steal.System = System;
		global.steal.dev = require("./ext/dev.js");
		steal.clone = cloneSteal;
		module.exports = global.steal;
		global.steal.addSteal = addSteal;
		require("system-json");

	} else {
		var oldSteal = global.steal;
		global.steal = makeSteal(System);
		global.steal.startup(oldSteal && typeof oldSteal == 'object' && oldSteal)
			.then(null, function(error){
				if(typeof console !== "undefined") {
					// Hide from uglify
					var c = console;
					var type = c.error ? "error" : "log";
					c[type](error, error.stack);
				}
			});
		global.steal.clone = cloneSteal;
		global.steal.addSteal = addSteal;
	}

})(typeof window == "undefined" ? (typeof global === "undefined" ? this : global) : window);