systemjs
Version:
System loader extension for flexible AMD & CommonJS support
1,726 lines (1,440 loc) • 94 kB
JavaScript
/*
* SystemJS v0.18.0
*/
(function() {
function bootstrap() {(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();
// 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];
}
}var absURLRegEx = /^[^\/]+:\/\//;
function readMemberExpression(p, value) {
var pParts = p.split('.');
while (pParts.length)
value = value[pParts.shift()];
return value;
}
var baseURLCache = {};
function getBaseURLObj() {
if (baseURLCache[this.baseURL])
return baseURLCache[this.baseURL];
// normalize baseURL if not already
if (this.baseURL[this.baseURL.length - 1] != '/')
this.baseURL += '/';
var baseURL = new URL(this.baseURL, baseURI);
this.baseURL = baseURL.href;
return (baseURLCache[this.baseURL] = baseURL);
}
var baseURIObj = new URL(baseURI);
(function() {
hookConstructor(function(constructor) {
return function() {
constructor.call(this);
// support baseURL
this.baseURL = baseURI.substr(0, baseURI.lastIndexOf('/') + 1);
// support the empty module, as a concept
this.set('@empty', this.newModule({}));
};
});
/*
Normalization
If a name is relative, we apply URL normalization to the page
If a name is an absolute URL, we leave it as-is
Plain names (neither of the above) run through the map and package
normalization phases (applying before and after this one).
The paths normalization phase applies last (paths extension), which
defines the `normalizeSync` function and normalizes everything into
a URL.
The final normalization
*/
hook('normalize', function() {
return function(name, parentName) {
// relative URL-normalization
if (name[0] == '.' || name[0] == '/')
return new URL(name, parentName || baseURIObj).href;
return name;
};
});
/*
__useDefault
When a module object looks like:
newModule(
__useDefault: true,
default: 'some-module'
})
Then importing that module provides the 'some-module'
result directly instead of the full module.
Useful for eg module.exports = function() {}
*/
hook('import', function(systemImport) {
return function(name, parentName, parentAddress) {
return systemImport.call(this, name, parentName, parentAddress).then(function(module) {
return module.__useDefault ? module['default'] : module;
});
};
});
/*
Extend config merging one deep only
loader.config({
some: 'random',
config: 'here',
deep: {
config: { too: 'too' }
}
});
<=>
loader.some = 'random';
loader.config = 'here'
loader.deep = loader.deep || {};
loader.deep.config = { too: 'too' };
Normalizes meta and package configs allowing for:
System.config({
meta: {
'./index.js': {}
}
});
To become
System.meta['https://thissite.com/index.js'] = {};
For easy normalization canonicalization with latest URL support.
*/
SystemJSLoader.prototype.config = function(cfg) {
// always configure baseURL first
if (cfg.baseURL) {
var hasConfig = false;
function checkHasConfig(obj) {
for (var p in obj)
return true;
}
if (checkHasConfig(this.packages) || checkHasConfig(this.meta) || checkHasConfig(this.depCache) || checkHasConfig(this.bundles))
throw new TypeError('baseURL should only be configured once and must be configured first.');
this.baseURL = cfg.baseURL;
// sanitize baseURL
getBaseURLObj.call(this);
}
if (cfg.map) {
for (var p in cfg.map) {
var v = cfg.map[p];
// object map backwards-compat into packages configuration
if (typeof v !== 'string') {
var normalized = this.normalizeSync(p);
// if doing default js extensions, undo to get package name
if (this.defaultJSExtensions && p.substr(p.length - 3, 3) != '.js')
normalized = normalized.substr(0, normalized.length - 3);
// if a package main, revert it
var pkgMatch = '';
for (var pkg in this.packages) {
if (normalized.substr(0, pkg.length) == pkg
&& (!normalized[pkg.length] || normalized[pkg.length] == '/')
&& pkgMatch.split('/').length < pkg.split('/').length)
pkgMatch = pkg;
}
if (pkgMatch && this.packages[pkgMatch].main)
normalized = normalized.substr(0, normalized.length - this.packages[pkgMatch].main.length - 1);
var pkg = this.packages[normalized] = this.packages[normalized] || {};
pkg.map = v;
}
else {
this.map[p] = v;
}
}
}
if (cfg.packages) {
for (var p in cfg.packages) {
var prop = this.normalizeSync(p);
// if doing default js extensions, undo to get package name
if (this.defaultJSExtensions && p.substr(p.length - 3, 3) != '.js')
prop = prop.substr(0, prop.length - 3);
this.packages[prop]= this.packages[prop] || {};
for (var q in cfg.packages[p])
this.packages[prop][q] = cfg.packages[p][q];
}
}
if (cfg.bundles) {
for (var p in cfg.bundles) {
var bundle = [];
for (var i = 0; i < cfg.bundles[p].length; i++)
bundle.push(this.normalizeSync(cfg.bundles[p][i]));
this.bundles[p] = bundle;
}
}
for (var c in cfg) {
var v = cfg[c];
var normalizeProp = false, normalizeValArray = false;
if (c == 'baseURL' || c == 'map' || c == 'packages' || c == 'bundles')
continue;
if (typeof v != 'object' || v instanceof Array) {
this[c] = v;
}
else {
this[c] = this[c] || {};
if (c == 'meta' || c == 'depCache')
normalizeProp = true;
for (var p in v) {
if (normalizeProp)
this[c][this.normalizeSync(p)] = v[p];
else
this[c][p] = v[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