systemjs
Version:
System loader extension for flexible AMD & CommonJS support
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JavaScript
/*
* SystemJS v0.18.0
*/
(function(__global) {
var isWorker = typeof window == 'undefined' && typeof self != 'undefined' && typeof importScripts != 'undefined';
var isBrowser = typeof window != 'undefined' && typeof document != 'undefined';
var isWindows = typeof process != 'undefined' && !!process.platform.match(/^win/);
if (!__global.console)
__global.console = { assert: function() {} };
// IE8 support
var indexOf = Array.prototype.indexOf || function(item) {
for (var i = 0, thisLen = this.length; i < thisLen; i++) {
if (this[i] === item) {
return i;
}
}
return -1;
};
var defineProperty;
(function () {
try {
if (!!Object.defineProperty({}, 'a', {}))
defineProperty = Object.defineProperty;
}
catch (e) {
defineProperty = function(obj, prop, opt) {
try {
obj[prop] = opt.value || opt.get.call(obj);
}
catch(e) {}
}
}
})();
function addToError(err, msg) {
var newErr;
if (err instanceof Error) {
var newErr = new Error(err.message, err.fileName, err.lineNumber);
newErr.message = err.message + '\n\t' + msg;
newErr.stack = err.stack;
}
else {
newErr = err + '\n\t' + msg;
}
return newErr;
}
function __eval(source, debugName, context) {
try {
new Function(source).call(context);
}
catch(e) {
throw addToError(e, 'Evaluating ' + debugName);
}
}
var baseURI;
// environent baseURI detection
if (typeof document != 'undefined' && document.getElementsByTagName) {
baseURI = document.baseURI;
if (!baseURI) {
var bases = document.getElementsByTagName('base');
baseURI = bases[0] && bases[0].href || window.location.href;
}
// sanitize out the hash and querystring
baseURI = baseURI.split('#')[0].split('?')[0];
baseURI = baseURI.substr(0, baseURI.lastIndexOf('/') + 1);
}
else if (typeof process != 'undefined' && process.cwd) {
baseURI = 'file://' + (isWindows ? '/' : '') + process.cwd() + '/';
if (isWindows)
baseURI = baseURI.replace(/\\/g, '/');
}
else if (typeof location != 'undefined') {
baseURI = __global.location.href;
}
else {
throw new TypeError('No environment baseURI');
}
var URL = typeof __global.URL == 'function' && __global.URL || URLPolyfill;
/*
*********************************************************************************************
Dynamic Module Loader Polyfill
- Implemented exactly to the former 2014-08-24 ES6 Specification Draft Rev 27, Section 15
http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts#august_24_2014_draft_rev_27
- Functions are commented with their spec numbers, with spec differences commented.
- Spec bugs are commented in this code with links.
- Abstract functions have been combined where possible, and their associated functions
commented.
- Realm implementation is entirely omitted.
*********************************************************************************************
*/
function Module() {}
function Loader(options) {
this._loader = {
loaderObj: this,
loads: [],
modules: {},
importPromises: {},
moduleRecords: {}
};
// 26.3.3.6
defineProperty(this, 'global', {
get: function() {
return __global;
}
});
// 26.3.3.13 realm not implemented
}
(function() {
// Some Helpers
// logs a linkset snapshot for debugging
/* function snapshot(loader) {
console.log('---Snapshot---');
for (var i = 0; i < loader.loads.length; i++) {
var load = loader.loads[i];
var linkSetLog = ' ' + load.name + ' (' + load.status + '): ';
for (var j = 0; j < load.linkSets.length; j++) {
linkSetLog += '{' + logloads(load.linkSets[j].loads) + '} ';
}
console.log(linkSetLog);
}
console.log('');
}
function logloads(loads) {
var log = '';
for (var k = 0; k < loads.length; k++)
log += loads[k].name + (k != loads.length - 1 ? ' ' : '');
return log;
} */
/* function checkInvariants() {
// see https://bugs.ecmascript.org/show_bug.cgi?id=2603#c1
var loads = System._loader.loads;
var linkSets = [];
for (var i = 0; i < loads.length; i++) {
var load = loads[i];
console.assert(load.status == 'loading' || load.status == 'loaded', 'Each load is loading or loaded');
for (var j = 0; j < load.linkSets.length; j++) {
var linkSet = load.linkSets[j];
for (var k = 0; k < linkSet.loads.length; k++)
console.assert(loads.indexOf(linkSet.loads[k]) != -1, 'linkSet loads are a subset of loader loads');
if (linkSets.indexOf(linkSet) == -1)
linkSets.push(linkSet);
}
}
for (var i = 0; i < loads.length; i++) {
var load = loads[i];
for (var j = 0; j < linkSets.length; j++) {
var linkSet = linkSets[j];
if (linkSet.loads.indexOf(load) != -1)
console.assert(load.linkSets.indexOf(linkSet) != -1, 'linkSet contains load -> load contains linkSet');
if (load.linkSets.indexOf(linkSet) != -1)
console.assert(linkSet.loads.indexOf(load) != -1, 'load contains linkSet -> linkSet contains load');
}
}
for (var i = 0; i < linkSets.length; i++) {
var linkSet = linkSets[i];
for (var j = 0; j < linkSet.loads.length; j++) {
var load = linkSet.loads[j];
for (var k = 0; k < load.dependencies.length; k++) {
var depName = load.dependencies[k].value;
var depLoad;
for (var l = 0; l < loads.length; l++) {
if (loads[l].name != depName)
continue;
depLoad = loads[l];
break;
}
// loading records are allowed not to have their dependencies yet
// if (load.status != 'loading')
// console.assert(depLoad, 'depLoad found');
// console.assert(linkSet.loads.indexOf(depLoad) != -1, 'linkset contains all dependencies');
}
}
}
} */
// 15.2.3 - Runtime Semantics: Loader State
// 15.2.3.11
function createLoaderLoad(object) {
return {
// modules is an object for ES5 implementation
modules: {},
loads: [],
loaderObj: object
};
}
// 15.2.3.2 Load Records and LoadRequest Objects
// 15.2.3.2.1
function createLoad(name) {
return {
status: 'loading',
name: name,
linkSets: [],
dependencies: [],
metadata: {}
};
}
// 15.2.3.2.2 createLoadRequestObject, absorbed into calling functions
// 15.2.4
// 15.2.4.1
function loadModule(loader, name, options) {
return new Promise(asyncStartLoadPartwayThrough({
step: options.address ? 'fetch' : 'locate',
loader: loader,
moduleName: name,
// allow metadata for import https://bugs.ecmascript.org/show_bug.cgi?id=3091
moduleMetadata: options && options.metadata || {},
moduleSource: options.source,
moduleAddress: options.address
}));
}
// 15.2.4.2
function requestLoad(loader, request, refererName, refererAddress) {
// 15.2.4.2.1 CallNormalize
return new Promise(function(resolve, reject) {
resolve(loader.loaderObj.normalize(request, refererName, refererAddress));
})
// 15.2.4.2.2 GetOrCreateLoad
.then(function(name) {
var load;
if (loader.modules[name]) {
load = createLoad(name);
load.status = 'linked';
// https://bugs.ecmascript.org/show_bug.cgi?id=2795
load.module = loader.modules[name];
return load;
}
for (var i = 0, l = loader.loads.length; i < l; i++) {
load = loader.loads[i];
if (load.name != name)
continue;
console.assert(load.status == 'loading' || load.status == 'loaded', 'loading or loaded');
return load;
}
load = createLoad(name);
loader.loads.push(load);
proceedToLocate(loader, load);
return load;
});
}
// 15.2.4.3
function proceedToLocate(loader, load) {
proceedToFetch(loader, load,
Promise.resolve()
// 15.2.4.3.1 CallLocate
.then(function() {
return loader.loaderObj.locate({ name: load.name, metadata: load.metadata });
})
);
}
// 15.2.4.4
function proceedToFetch(loader, load, p) {
proceedToTranslate(loader, load,
p
// 15.2.4.4.1 CallFetch
.then(function(address) {
// adjusted, see https://bugs.ecmascript.org/show_bug.cgi?id=2602
if (load.status != 'loading')
return;
load.address = address;
return loader.loaderObj.fetch({ name: load.name, metadata: load.metadata, address: address });
})
);
}
var anonCnt = 0;
// 15.2.4.5
function proceedToTranslate(loader, load, p) {
p
// 15.2.4.5.1 CallTranslate
.then(function(source) {
if (load.status != 'loading')
return;
return Promise.resolve(loader.loaderObj.translate({ name: load.name, metadata: load.metadata, address: load.address, source: source }))
// 15.2.4.5.2 CallInstantiate
.then(function(source) {
load.source = source;
return loader.loaderObj.instantiate({ name: load.name, metadata: load.metadata, address: load.address, source: source });
})
// 15.2.4.5.3 InstantiateSucceeded
.then(function(instantiateResult) {
if (instantiateResult === undefined) {
load.address = load.address || '<Anonymous Module ' + ++anonCnt + '>';
// instead of load.kind, use load.isDeclarative
load.isDeclarative = true;
return transpile.call(loader.loaderObj, load)
.then(function(transpiled) {
// Hijack System.register to set declare function
var curSystem = __global.System;
var curRegister = curSystem.register;
curSystem.register = function(name, deps, declare) {
if (typeof name != 'string') {
declare = deps;
deps = name;
}
// store the registered declaration as load.declare
// store the deps as load.deps
load.declare = declare;
load.depsList = deps;
}
// empty {} context is closest to undefined 'this' we can get
__eval(transpiled, load.address, {});
curSystem.register = curRegister;
});
}
else if (typeof instantiateResult == 'object') {
load.depsList = instantiateResult.deps || [];
load.execute = instantiateResult.execute;
load.isDeclarative = false;
}
else
throw TypeError('Invalid instantiate return value');
})
// 15.2.4.6 ProcessLoadDependencies
.then(function() {
load.dependencies = [];
var depsList = load.depsList;
var loadPromises = [];
for (var i = 0, l = depsList.length; i < l; i++) (function(request, index) {
loadPromises.push(
requestLoad(loader, request, load.name, load.address)
// 15.2.4.6.1 AddDependencyLoad (load is parentLoad)
.then(function(depLoad) {
// adjusted from spec to maintain dependency order
// this is due to the System.register internal implementation needs
load.dependencies[index] = {
key: request,
value: depLoad.name
};
if (depLoad.status != 'linked') {
var linkSets = load.linkSets.concat([]);
for (var i = 0, l = linkSets.length; i < l; i++)
addLoadToLinkSet(linkSets[i], depLoad);
}
// console.log('AddDependencyLoad ' + depLoad.name + ' for ' + load.name);
// snapshot(loader);
})
);
})(depsList[i], i);
return Promise.all(loadPromises);
})
// 15.2.4.6.2 LoadSucceeded
.then(function() {
// console.log('LoadSucceeded ' + load.name);
// snapshot(loader);
console.assert(load.status == 'loading', 'is loading');
load.status = 'loaded';
var linkSets = load.linkSets.concat([]);
for (var i = 0, l = linkSets.length; i < l; i++)
updateLinkSetOnLoad(linkSets[i], load);
});
})
// 15.2.4.5.4 LoadFailed
['catch'](function(exc) {
load.status = 'failed';
load.exception = exc;
var linkSets = load.linkSets.concat([]);
for (var i = 0, l = linkSets.length; i < l; i++) {
linkSetFailed(linkSets[i], load, exc);
}
console.assert(load.linkSets.length == 0, 'linkSets not removed');
});
}
// 15.2.4.7 PromiseOfStartLoadPartwayThrough absorbed into calling functions
// 15.2.4.7.1
function asyncStartLoadPartwayThrough(stepState) {
return function(resolve, reject) {
var loader = stepState.loader;
var name = stepState.moduleName;
var step = stepState.step;
if (loader.modules[name])
throw new TypeError('"' + name + '" already exists in the module table');
// adjusted to pick up existing loads
var existingLoad;
for (var i = 0, l = loader.loads.length; i < l; i++) {
if (loader.loads[i].name == name) {
existingLoad = loader.loads[i];
if(step == 'translate' && !existingLoad.source) {
existingLoad.address = stepState.moduleAddress;
proceedToTranslate(loader, existingLoad, Promise.resolve(stepState.moduleSource));
}
return existingLoad.linkSets[0].done.then(function() {
resolve(existingLoad);
});
}
}
var load = createLoad(name);
load.metadata = stepState.moduleMetadata;
var linkSet = createLinkSet(loader, load);
loader.loads.push(load);
resolve(linkSet.done);
if (step == 'locate')
proceedToLocate(loader, load);
else if (step == 'fetch')
proceedToFetch(loader, load, Promise.resolve(stepState.moduleAddress));
else {
console.assert(step == 'translate', 'translate step');
load.address = stepState.moduleAddress;
proceedToTranslate(loader, load, Promise.resolve(stepState.moduleSource));
}
}
}
// Declarative linking functions run through alternative implementation:
// 15.2.5.1.1 CreateModuleLinkageRecord not implemented
// 15.2.5.1.2 LookupExport not implemented
// 15.2.5.1.3 LookupModuleDependency not implemented
// 15.2.5.2.1
function createLinkSet(loader, startingLoad) {
var linkSet = {
loader: loader,
loads: [],
startingLoad: startingLoad, // added see spec bug https://bugs.ecmascript.org/show_bug.cgi?id=2995
loadingCount: 0
};
linkSet.done = new Promise(function(resolve, reject) {
linkSet.resolve = resolve;
linkSet.reject = reject;
});
addLoadToLinkSet(linkSet, startingLoad);
return linkSet;
}
// 15.2.5.2.2
function addLoadToLinkSet(linkSet, load) {
console.assert(load.status == 'loading' || load.status == 'loaded', 'loading or loaded on link set');
for (var i = 0, l = linkSet.loads.length; i < l; i++)
if (linkSet.loads[i] == load)
return;
linkSet.loads.push(load);
load.linkSets.push(linkSet);
// adjustment, see https://bugs.ecmascript.org/show_bug.cgi?id=2603
if (load.status != 'loaded') {
linkSet.loadingCount++;
}
var loader = linkSet.loader;
for (var i = 0, l = load.dependencies.length; i < l; i++) {
var name = load.dependencies[i].value;
if (loader.modules[name])
continue;
for (var j = 0, d = loader.loads.length; j < d; j++) {
if (loader.loads[j].name != name)
continue;
addLoadToLinkSet(linkSet, loader.loads[j]);
break;
}
}
// console.log('add to linkset ' + load.name);
// snapshot(linkSet.loader);
}
// linking errors can be generic or load-specific
// this is necessary for debugging info
function doLink(linkSet) {
var error = false;
try {
link(linkSet, function(load, exc) {
linkSetFailed(linkSet, load, exc);
error = true;
});
}
catch(e) {
linkSetFailed(linkSet, null, e);
error = true;
}
return error;
}
// 15.2.5.2.3
function updateLinkSetOnLoad(linkSet, load) {
// console.log('update linkset on load ' + load.name);
// snapshot(linkSet.loader);
console.assert(load.status == 'loaded' || load.status == 'linked', 'loaded or linked');
linkSet.loadingCount--;
if (linkSet.loadingCount > 0)
return;
// adjusted for spec bug https://bugs.ecmascript.org/show_bug.cgi?id=2995
var startingLoad = linkSet.startingLoad;
// non-executing link variation for loader tracing
// on the server. Not in spec.
/***/
if (linkSet.loader.loaderObj.execute === false) {
var loads = [].concat(linkSet.loads);
for (var i = 0, l = loads.length; i < l; i++) {
var load = loads[i];
load.module = !load.isDeclarative ? {
module: _newModule({})
} : {
name: load.name,
module: _newModule({}),
evaluated: true
};
load.status = 'linked';
finishLoad(linkSet.loader, load);
}
return linkSet.resolve(startingLoad);
}
/***/
var abrupt = doLink(linkSet);
if (abrupt)
return;
console.assert(linkSet.loads.length == 0, 'loads cleared');
linkSet.resolve(startingLoad);
}
// 15.2.5.2.4
function linkSetFailed(linkSet, load, exc) {
var loader = linkSet.loader;
if (load) {
if (load && linkSet.loads[0].name != load.name)
exc = addToError(exc, 'Error loading ' + load.name + ' from ' + linkSet.loads[0].name);
if (load)
exc = addToError(exc, 'Error loading ' + load.name);
}
else {
exc = addToError(exc, 'Error linking ' + linkSet.loads[0].name);
}
var loads = linkSet.loads.concat([]);
for (var i = 0, l = loads.length; i < l; i++) {
var load = loads[i];
// store all failed load records
loader.loaderObj.failed = loader.loaderObj.failed || [];
if (indexOf.call(loader.loaderObj.failed, load) == -1)
loader.loaderObj.failed.push(load);
var linkIndex = indexOf.call(load.linkSets, linkSet);
console.assert(linkIndex != -1, 'link not present');
load.linkSets.splice(linkIndex, 1);
if (load.linkSets.length == 0) {
var globalLoadsIndex = indexOf.call(linkSet.loader.loads, load);
if (globalLoadsIndex != -1)
linkSet.loader.loads.splice(globalLoadsIndex, 1);
}
}
linkSet.reject(exc);
}
// 15.2.5.2.5
function finishLoad(loader, load) {
// add to global trace if tracing
if (loader.loaderObj.trace) {
if (!loader.loaderObj.loads)
loader.loaderObj.loads = {};
var depMap = {};
load.dependencies.forEach(function(dep) {
depMap[dep.key] = dep.value;
});
loader.loaderObj.loads[load.name] = {
name: load.name,
deps: load.dependencies.map(function(dep){ return dep.key }),
depMap: depMap,
address: load.address,
metadata: load.metadata,
source: load.source,
kind: load.isDeclarative ? 'declarative' : 'dynamic'
};
}
// if not anonymous, add to the module table
if (load.name) {
console.assert(!loader.modules[load.name], 'load not in module table');
loader.modules[load.name] = load.module;
}
var loadIndex = indexOf.call(loader.loads, load);
if (loadIndex != -1)
loader.loads.splice(loadIndex, 1);
for (var i = 0, l = load.linkSets.length; i < l; i++) {
loadIndex = indexOf.call(load.linkSets[i].loads, load);
if (loadIndex != -1)
load.linkSets[i].loads.splice(loadIndex, 1);
}
load.linkSets.splice(0, load.linkSets.length);
}
function doDynamicExecute(linkSet, load, linkError) {
try {
var module = load.execute();
}
catch(e) {
linkError(load, e);
return;
}
if (!module || !(module instanceof Module))
linkError(load, new TypeError('Execution must define a Module instance'));
else
return module;
}
// 26.3 Loader
// 26.3.1.1
// defined at top
// importPromises adds ability to import a module twice without error - https://bugs.ecmascript.org/show_bug.cgi?id=2601
function createImportPromise(loader, name, promise) {
var importPromises = loader._loader.importPromises;
return importPromises[name] = promise.then(function(m) {
importPromises[name] = undefined;
return m;
}, function(e) {
importPromises[name] = undefined;
throw e;
});
}
Loader.prototype = {
// 26.3.3.1
constructor: Loader,
// 26.3.3.2
define: function(name, source, options) {
// check if already defined
if (this._loader.importPromises[name])
throw new TypeError('Module is already loading.');
return createImportPromise(this, name, new Promise(asyncStartLoadPartwayThrough({
step: 'translate',
loader: this._loader,
moduleName: name,
moduleMetadata: options && options.metadata || {},
moduleSource: source,
moduleAddress: options && options.address
})));
},
// 26.3.3.3
'delete': function(name) {
var loader = this._loader;
delete loader.importPromises[name];
delete loader.moduleRecords[name];
return loader.modules[name] ? delete loader.modules[name] : false;
},
// 26.3.3.4 entries not implemented
// 26.3.3.5
get: function(key) {
if (!this._loader.modules[key])
return;
doEnsureEvaluated(this._loader.modules[key], [], this);
return this._loader.modules[key].module;
},
// 26.3.3.7
has: function(name) {
return !!this._loader.modules[name];
},
// 26.3.3.8
'import': function(name, parentName, parentAddress) {
if (typeof parentName == 'object')
parentName = parentName.name;
// run normalize first
var loaderObj = this;
// added, see https://bugs.ecmascript.org/show_bug.cgi?id=2659
return Promise.resolve(loaderObj.normalize(name, parentName))
.then(function(name) {
var loader = loaderObj._loader;
if (loader.modules[name]) {
doEnsureEvaluated(loader.modules[name], [], loader._loader);
return loader.modules[name].module;
}
return loader.importPromises[name] || createImportPromise(loaderObj, name,
loadModule(loader, name, {})
.then(function(load) {
delete loader.importPromises[name];
return evaluateLoadedModule(loader, load);
}));
});
},
// 26.3.3.9 keys not implemented
// 26.3.3.10
load: function(name, options) {
if (this._loader.modules[name]) {
doEnsureEvaluated(this._loader.modules[name], [], this._loader);
return Promise.resolve(this._loader.modules[name].module);
}
return this._loader.importPromises[name] || createImportPromise(this, name, loadModule(this._loader, name, {}));
},
// 26.3.3.11
module: function(source, options) {
var load = createLoad();
load.address = options && options.address;
var linkSet = createLinkSet(this._loader, load);
var sourcePromise = Promise.resolve(source);
var loader = this._loader;
var p = linkSet.done.then(function() {
return evaluateLoadedModule(loader, load);
});
proceedToTranslate(loader, load, sourcePromise);
return p;
},
// 26.3.3.12
newModule: function (obj) {
if (typeof obj != 'object')
throw new TypeError('Expected object');
// we do this to be able to tell if a module is a module privately in ES5
// by doing m instanceof Module
var m = new Module();
var pNames;
if (Object.getOwnPropertyNames && obj != null) {
pNames = Object.getOwnPropertyNames(obj);
}
else {
pNames = [];
for (var key in obj)
pNames.push(key);
}
for (var i = 0; i < pNames.length; i++) (function(key) {
defineProperty(m, key, {
configurable: false,
enumerable: true,
get: function () {
return obj[key];
}
});
})(pNames[i]);
if (Object.preventExtensions)
Object.preventExtensions(m);
return m;
},
// 26.3.3.14
set: function(name, module) {
if (!(module instanceof Module))
throw new TypeError('Loader.set(' + name + ', module) must be a module');
this._loader.modules[name] = {
module: module
};
},
// 26.3.3.15 values not implemented
// 26.3.3.16 @@iterator not implemented
// 26.3.3.17 @@toStringTag not implemented
// 26.3.3.18.1
normalize: function(name, referrerName, referrerAddress) {
return name;
},
// 26.3.3.18.2
locate: function(load) {
return load.name;
},
// 26.3.3.18.3
fetch: function(load) {
},
// 26.3.3.18.4
translate: function(load) {
return load.source;
},
// 26.3.3.18.5
instantiate: function(load) {
}
};
var _newModule = Loader.prototype.newModule;
/*
* ES6 Module Declarative Linking Code - Dev Build Only
*/
function link(linkSet, linkError) {
var loader = linkSet.loader;
if (!linkSet.loads.length)
return;
var loads = linkSet.loads.concat([]);
for (var i = 0; i < loads.length; i++) {
var load = loads[i];
var module = doDynamicExecute(linkSet, load, linkError);
if (!module)
return;
load.module = {
name: load.name,
module: module
};
load.status = 'linked';
finishLoad(loader, load);
}
}
function evaluateLoadedModule(loader, load) {
console.assert(load.status == 'linked', 'is linked ' + load.name);
return load.module.module;
}
function doEnsureEvaluated() {}
})();/*
*********************************************************************************************
System Loader Implementation
- Implemented to https://github.com/jorendorff/js-loaders/blob/master/browser-loader.js
- <script type="module"> supported
*********************************************************************************************
*/
var System;
function SystemLoader() {
Loader.call(this);
this.paths = {};
}
// NB no specification provided for System.paths, used ideas discussed in https://github.com/jorendorff/js-loaders/issues/25
function applyPaths(paths, name) {
// most specific (most number of slashes in path) match wins
var pathMatch = '', wildcard, maxSlashCount = 0;
// check to see if we have a paths entry
for (var p in paths) {
var pathParts = p.split('*');
if (pathParts.length > 2)
throw new TypeError('Only one wildcard in a path is permitted');
// exact path match
if (pathParts.length == 1) {
if (name == p) {
pathMatch = p;
break;
}
}
// wildcard path match
else {
var slashCount = p.split('/').length;
if (slashCount >= maxSlashCount &&
name.substr(0, pathParts[0].length) == pathParts[0] &&
name.substr(name.length - pathParts[1].length) == pathParts[1]) {
maxSlashCount = slashCount;
pathMatch = p;
wildcard = name.substr(pathParts[0].length, name.length - pathParts[1].length - pathParts[0].length);
}
}
}
var outPath = paths[pathMatch] || name;
if (wildcard)
outPath = outPath.replace('*', wildcard);
return outPath;
}
// inline Object.create-style class extension
function LoaderProto() {}
LoaderProto.prototype = Loader.prototype;
SystemLoader.prototype = new LoaderProto();
var absURLRegEx = /^([^\/]+:\/\/|\/)/;
// Normalization with module names as absolute URLs
SystemLoader.prototype.normalize = function(name, parentName, parentAddress) {
// NB does `import 'file.js'` import relative to the parent name or baseURL?
// have assumed that it is baseURL-relative here, but spec may well align with URLs to be the latter
// safe option for users is to always use "./file.js" for relative
// not absolute or relative -> apply paths (what will be sites)
if (!name.match(absURLRegEx) && name[0] != '.')
name = new URL(applyPaths(this.paths, name), baseURI).href;
// apply parent-relative normalization, parentAddress is already normalized
else
name = new URL(name, parentName || baseURI).href;
return name;
};
SystemLoader.prototype.locate = function(load) {
return load.name;
};
// ensure the transpiler is loaded correctly
SystemLoader.prototype.instantiate = function(load) {
var self = this;
return Promise.resolve(self.normalize(self.transpiler))
.then(function(transpilerNormalized) {
// load transpiler as a global (avoiding System clobbering)
if (load.address === transpilerNormalized) {
return {
deps: [],
execute: function() {
var curSystem = __global.System;
var curLoader = __global.Reflect.Loader;
// ensure not detected as CommonJS
__eval('(function(require,exports,module){' + load.source + '})();', load.address, __global);
__global.System = curSystem;
__global.Reflect.Loader = curLoader;
return self.newModule({ 'default': __global[self.transpiler], __useDefault: true });
}
};
}
});
};// SystemJS Loader Class and Extension helpers
function SystemJSLoader() {
SystemLoader.call(this);
systemJSConstructor.call(this);
}
// inline Object.create-style class extension
function SystemProto() {};
SystemProto.prototype = SystemLoader.prototype;
SystemJSLoader.prototype = new SystemProto();
var systemJSConstructor;
function hook(name, hook) {
SystemJSLoader.prototype[name] = hook(SystemJSLoader.prototype[name]);
}
function hookConstructor(hook) {
systemJSConstructor = hook(systemJSConstructor || function() {});
}
function dedupe(deps) {
var newDeps = [];
for (var i = 0, l = deps.length; i < l; i++)
if (indexOf.call(newDeps, deps[i]) == -1)
newDeps.push(deps[i])
return newDeps;
}
function extend(a, b, underwrite) {
for (var p in b) {
if (!underwrite || !(p in a))
a[p] = b[p];
}
}/*
* Script tag fetch
*
* When load.metadata.scriptLoad is true, we load via script tag injection.
*/
(function() {
if (typeof document != 'undefined')
var head = document.getElementsByTagName('head')[0];
// call this functione everytime a wrapper executes
var curSystem;
// System clobbering protection for Traceur
SystemJSLoader.prototype.onScriptLoad = function() {
__global.System = curSystem;
};
function webWorkerImport(loader, load) {
return new Promise(function(resolve, reject) {
try {
importScripts(load.address);
}
catch(e) {
reject(e);
}
loader.onScriptLoad(load);
// if nothing registered, then something went wrong
if (!load.metadata.registered)
reject(load.address + ' did not call System.register or AMD define');
resolve('');
});
}
// override fetch to use script injection
hook('fetch', function(fetch) {
return function(load) {
var loader = this;
if (!load.metadata.scriptLoad || (!isBrowser && !isWorker))
return fetch.call(this, load);
if (isWorker)
return webWorkerImport(loader, load);
return new Promise(function(resolve, reject) {
var s = document.createElement('script');
s.async = true;
function complete(evt) {
if (s.readyState && s.readyState != 'loaded' && s.readyState != 'complete')
return;
cleanup();
// this runs synchronously after execution
// we now need to tell the wrapper handlers that
// this load record has just executed
loader.onScriptLoad(load);
// if nothing registered, then something went wrong
if (!load.metadata.registered)
reject(load.address + ' did not call System.register or AMD define');
resolve('');
}
function error(evt) {
cleanup();
reject(new Error('Unable to load script ' + load.address));
}
if (s.attachEvent) {
s.attachEvent('onreadystatechange', complete);
}
else {
s.addEventListener('load', complete, false);
s.addEventListener('error', error, false);
}
curSystem = __global.System;
__global.System = loader;
s.src = load.address;
head.appendChild(s);
function cleanup() {
if (s.detachEvent)
s.detachEvent('onreadystatechange', complete);
else {
s.removeEventListener('load', complete, false);
s.removeEventListener('error', error, false);
}
head.removeChild(s);
}
});
};
});
})();
/*
* Script-only addition used for production loader
*
*/
hook('fetch', function(fetch) {
return function(load) {
load.metadata.scriptLoad = true;
// prepare amd define
this.get('@@amd-helpers').createDefine(this);
return fetch.call(this, load);
};
});
// AMD support
// script injection mode calls this function synchronously on load
hook('onScriptLoad', function(onScriptLoad) {
return function(load) {
onScriptLoad.call(this, load);
var lastModule = this.get('@@amd-helpers').lastModule;
if (lastModule.anonDefine || lastModule.isBundle) {
load.metadata.format = 'defined';
load.metadata.registered = true;
lastModule.isBundle = false;
}
if (lastModule.anonDefine) {
load.metadata.deps = load.metadata.deps ? load.metadata.deps.concat(lastModule.anonDefine.deps) : lastModule.anonDefine.deps;
load.metadata.execute = lastModule.anonDefine.execute;
lastModule.anonDefine = null;
}
};
});/*
* Instantiate registry extension
*
* Supports Traceur System.register 'instantiate' output for loading ES6 as ES5.
*
* - Creates the loader.register function
* - Also supports metadata.format = 'register' in instantiate for anonymous register modules
* - Also supports metadata.deps, metadata.execute and metadata.executingRequire
* for handling dynamic modules alongside register-transformed ES6 modules
*
*
* The code here replicates the ES6 linking groups algorithm to ensure that
* circular ES6 compiled into System.register can work alongside circular AMD
* and CommonJS, identically to the actual ES6 loader.
*
*/
(function() {
/*
* There are two variations of System.register:
* 1. System.register for ES6 conversion (2-3 params) - System.register([name, ]deps, declare)
* see https://github.com/ModuleLoader/es6-module-loader/wiki/System.register-Explained
*
* 2. System.registerDynamic for dynamic modules (3-4 params) - System.registerDynamic([name, ]deps, executingRequire, execute)
* the true or false statement
*
* this extension implements the linking algorithm for the two variations identical to the spec
* allowing compiled ES6 circular references to work alongside AMD and CJS circular references.
*
*/
var anonRegister;
var calledRegister;
function doRegister(loader, name, register) {
calledRegister = true;
// named register
if (name) {
name = loader.normalizeSync(name);
register.name = name;
if (!(name in loader.defined))
loader.defined[name] = register;
}
// anonymous register
else if (register.declarative) {
if (anonRegister)
throw new TypeError('Multiple anonymous System.register calls in the same module file.');
anonRegister = register;
}
}
SystemJSLoader.prototype.register = function(name, deps, declare) {
if (typeof name != 'string') {
declare = deps;
deps = name;
name = null;
}
// dynamic backwards-compatibility
// can be deprecated eventually
if (typeof declare == 'boolean')
return this.registerDynamic.apply(this, arguments);
doRegister(this, name, {
declarative: true,
deps: deps,
declare: declare
});
};
SystemJSLoader.prototype.registerDynamic = function(name, deps, declare, execute) {
if (typeof name != 'string') {
execute = declare;
declare = deps;
deps = name;
name = null;
}
// dynamic
doRegister(this, name, {
declarative: false,
deps: deps,
execute: execute,
executingRequire: declare
});
};
/*
* Registry side table - loader.defined
* Registry Entry Contains:
* - name
* - deps
* - declare for declarative modules
* - execute for dynamic modules, different to declarative execute on module
* - executingRequire indicates require drives execution for circularity of dynamic modules
* - declarative optional boolean indicating which of the above
*
* Can preload modules directly on System.defined['my/module'] = { deps, execute, executingRequire }
*
* Then the entry gets populated with derived information during processing:
* - normalizedDeps derived from deps, created in instantiate
* - groupIndex used by group linking algorithm
* - evaluated indicating whether evaluation has happend
* - module the module record object, containing:
* - exports actual module exports
*
* For dynamic we track the es module with:
* - esModule actual es module value
*
* Then for declarative only we track dynamic bindings with the 'module' records:
* - name
* - exports
* - setters declarative setter functions
* - dependencies, module records of dependencies
* - importers, module records of dependents
*
* After linked and evaluated, entries are removed, declarative module records remain in separate
* module binding table
*
*/
hookConstructor(function(constructor) {
return function() {
constructor.call(this);
this.defined = {};
this._loader.moduleRecords = {};
};
});
// script injection mode calls this function synchronously on load
hook('onScriptLoad', function(onScriptLoad) {
return function(load) {
onScriptLoad.call(this, load);
// anonymous define
if (anonRegister)
load.metadata.entry = anonRegister;
if (calledRegister) {
load.metadata.format = load.metadata.format || 'defined';
load.metadata.registered = true;
calledRegister = false;
anonRegister = null;
}
};
});
function buildGroups(entry, loader, groups) {
groups[entry.groupIndex] = groups[entry.groupIndex] || [];
if (indexOf.call(groups[entry.groupIndex], entry) != -1)
return;
groups[entry.groupIndex].push(entry);
for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
var depName = entry.normalizedDeps[i];
var depEntry = loader.defined[depName];
// not in the registry means already linked / ES6
if (!depEntry || depEntry.evaluated)
continue;
// now we know the entry is in our unlinked linkage group
var depGroupIndex = entry.groupIndex + (depEntry.declarative != entry.declarative);
// the group index of an entry is always the maximum
if (depEntry.groupIndex === undefined || depEntry.groupIndex < depGroupIndex) {
// if already in a group, remove from the old group
if (depEntry.groupIndex !== undefined) {
groups[depEntry.groupIndex].splice(indexOf.call(groups[depEntry.groupIndex], depEntry), 1);
// if the old group is empty, then we have a mixed depndency cycle
if (groups[depEntry.groupIndex].length == 0)
throw new TypeError("Mixed dependency cycle detected");
}
depEntry.groupIndex = depGroupIndex;
}
buildGroups(depEntry, loader, groups);
}
}
function link(name, loader) {
var startEntry = loader.defined[name];
// skip if already linked
if (startEntry.module)
return;
startEntry.groupIndex = 0;
var groups = [];
buildGroups(startEntry, loader, groups);
var curGroupDeclarative = !!startEntry.declarative == groups.length % 2;
for (var i = groups.length - 1; i >= 0; i--) {
var group = groups[i];
for (var j = 0; j < group.length; j++) {
var entry = group[j];
// link each group
if (curGroupDeclarative)
linkDeclarativeModule(entry, loader);
else
linkDynamicModule(entry, loader);
}
curGroupDeclarative = !curGroupDeclarative;
}
}
// module binding records
function getOrCreateModuleRecord(name, moduleRecords) {
return moduleRecords[name] || (moduleRecords[name] = {
name: name,
dependencies: [],
exports: {}, // start from an empty module and extend
importers: []
});
}
function linkDeclarativeModule(entry, loader) {
// only link if already not already started linking (stops at circular)
if (entry.module)
return;
var moduleRecords = loader._loader.moduleRecords;
var module = entry.module = getOrCreateModuleRecord(entry.name, moduleRecords);
var exports = entry.module.exports;
var declaration = entry.declare.call(__global, function(name, value) {
module.locked = true;
if (typeof name == 'object') {
for (var p in name)
exports[p] = name[p];
}
else {
exports[name] = value;
}
for (var i = 0, l = module.importers.length; i < l; i++) {
var importerModule = module.importers[i];
if (!importerModule.locked) {
var importerIndex = indexOf.call(importerModule.dependencies, module);
importerModule.setters[importerIndex](exports);
}
}
module.locked = false;
return value;
});
module.setters = declaration.setters;
module.execute = declaration.execute;
if (!module.setters || !module.execute) {
throw new TypeError('Invalid System.register form for ' + entry.name);
}
// now link all the module dependencies
for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
var depName = entry.normalizedDeps[i];
var depEntry = loader.defined[depName];
var depModule = moduleRecords[depName];
// work out how to set depExports based on scenarios...
var depExports;
if (depModule) {
depExports = depModule.exports;
}
// dynamic, already linked in our registry
else if (depEntry && !depEntry.declarative) {
depExports = depEntry.esModule;
}
// in the loader registry
else if (!depEntry) {
depExports = loader.get(depName);
}
// we have an entry -> link
else {
linkDeclarativeModule(depEntry, loader);
depModule = depEntry.module;
depExports = depModule.exports;
}
// only declarative modules have dynamic bindings
if (depModule && depModule.importers) {
depModule.importers.push(module);
module.dependencies.push(depModule);
}
else {
module.dependencies.push(null);
}
// run the setter for this dependency
if (module.setters[i])
module.setters[i](depExports);
}
}
// An analog to loader.get covering execution of all three layers (real declarative, simulated declarative, simulated dynamic)
function getModule(name, loader) {
var exports;
var entry = loader.defined[name];
if (!entry) {
exports = loader.get(name);
if (!exports)
throw new Error('Unable to load dependency ' + name + '.');
}
else {
if (entry.declarative)
ensureEvaluated(name, [], loader);
else if (!entry.evaluated)
linkDynamicModule(entry, loader);
exports = entry.module.exports;
}
if ((!entry || entry.declarative) && exports && exports.__useDefault)
return exports['default'];
return exports;
}
function linkDynamicModule(entry, loader) {
if (entry.module)
return;
var exports = {};
var module = entry.module = { exports: exports, id: entry.name };
// AMD requires execute the tree first
if (!entry.executingRequire) {
for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
var depName = entry.normalizedDeps[i];
// we know we only need to link dynamic due to linking algorithm
var depEntry = loader.defined[depName];
if (depEntry)
linkDynamicModule(depEntry, loader);
}
}
// now execute
entry.evaluated = true;
var output = entry.execute.call(__global, function(name) {
for (var i = 0, l = entry.deps.length; i < l; i++) {
if (entry.deps[i] != name)
continue;
return getModule(entry.normalizedDeps[i], loader);
}
throw new TypeError('Module ' + name + ' not declared as a dependency.');
}, exports, module);
if (output)
module.exports = output;
// create the esModule object, which allows ES6 named imports of dynamics
exports = module.exports;
if (exports && exports.__esModule) {
entry.esModule = exports;
}
else {
var hasOwnProperty = exports && exports.hasOwnProperty;
entry.esModule = {};
for (var p in exports) {
if (!hasOwnProperty || exports.hasOwnProperty(p))
entry.esModule[p] = exports[p];
}
entry.esModule['default'] = exports;
defineProperty(entry.esModule, '__useDefault', {
value: true
});
}
}
/*
* Given a module, and the list of modules for this current branch,
* ensure that each of the dependencies of this module is evaluated
* (unless one is a circular dependency already in the list of seen
* modules, in which case we execute it)
*
* Then we evaluate the module itself depth-first left to right
* execution to match ES6 modules
*/
function ensureEvaluated(moduleName, seen, loader) {
var entry = loader.defined[moduleName];
// if already seen, that means it's an already-evaluated non circular dependency
if (!entry || entry.evaluated || !entry.declarative)
return;
// this only applies to declarative modules which late-execute
seen.push(moduleName);
for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
var depName = entry.normalizedDeps[i];
if (indexOf.call(seen, depName) == -1) {
if (!loader.defined[depName])
loader.get(depName);
else
ensureEvaluated(depName, seen, loader);
}
}
if (entry.evaluated)
return;
entry.evaluated = true;
entry.module.execute.call(__global);
}
// override the delete method to also clear the register caches
hook('delete', function(del) {
return function(name) {
delete this._loader.moduleRecords[name];
delete this.defined[name];
return del.call(this, name);
};
});
var registerRegEx = /^\s*(\/\*.*\*\/\s*|\/\/[^\n]*\s*)*System\.register(Dyanmic)?\s*\(/;
hook('fetch', function(fetch) {
return function(load) {
if (this.defined[load.name]) {
load.metadata.format = 'defined';
return '';
}
// this is the synchronous chain for onScriptLoad
anonRegister = null;
calledRegister = false;
if (load.metadata.format == 'register')
load.metadata.scriptLoad = true;
// NB remove when "deps " is deprecated
load.metadata.deps = load.metadata.deps || [];
return fetch.call(this, load);
};
});
hook('translate', function(translate) {
// we run the meta detection here (register is after meta)
return function(load) {
return Promise.resolve(translate.call(this, load)).then(function(source) {
if (typeof load.metadata.deps === 'string')
load.metadata.deps = load.metadata.deps.split(',');
load.metadata.deps = load.metadata.deps || [];
// run detection for register format
if (load.metadata.format == 'register' || !load.metadata.format && load.source.match(registerRegEx))
load.metadata.format = 'register';
return source;
});
};
});
hook('instantiate', function(instantiate) {
return function(load) {
var loader = this;
var entry;
// first we check if this module has already been defined in the registry
if (loader.defined[load.name]) {
entry = loader.defined[load.name];
entry.deps = entry.deps.concat(load.metadata.deps);
}
// picked up already by a script injection
else if (load.metadata.entry)
entry = load.metadata.entry;
// otherwise check if it is dynamic
else if (load.metadata.execute) {
entry = {
declarative: false,
deps: load.metadata.deps || [],
execute: load.metadata.execute,
executingRequire: load.metadata.executingRequire // NodeJS-style requires or not
};
}
// Contains System.register calls
else if (load.metadata.format == 'register' || load.metadata.format == 'esm' || load.metadata.format == 'es6') {
anonRegister = null;
calledRegister = false;
__exec.call(loader, load);
if (anonRegister)
entry = anonRegister;
else
load.metadata.bundle = true;
if (!entry && loader.defined[load.name])
entry = loader.defined[load.name];
if (!calledRegister && !load.metadata.registered)
throw new TypeError(load.name + ' detected