mirror of
https://github.com/systemjs/systemjs.git
synced 2026-01-18 14:53:14 +00:00
288 lines
8.4 KiB
JavaScript
288 lines
8.4 KiB
JavaScript
/*
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SystemJS AMD Format
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Provides the AMD module format definition at System.format.amd
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as well as a RequireJS-style require on System.require
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*/
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(function() {
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// AMD Module Format Detection RegEx
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// define([.., .., ..], ...)
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// define(varName); || define(function(require, exports) {}); || define({})
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var amdRegEx = /(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF.])define\s*\(\s*("[^"]+"\s*,\s*|'[^']+'\s*,\s*)?\s*(\[(\s*(("[^"]+"|'[^']+')\s*,|\/\/.*\r?\n|\/\*(.|\s)*?\*\/))*(\s*("[^"]+"|'[^']+')\s*,?)?(\s*(\/\/.*\r?\n|\/\*(.|\s)*?\*\/))*\s*\]|function\s*|{|[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*\))/;
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var commentRegEx = /(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;
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var cjsRequirePre = "(?:^|[^$_a-zA-Z\\xA0-\\uFFFF.])";
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var cjsRequirePost = "\\s*\\(\\s*(\"([^\"]+)\"|'([^']+)')\\s*\\)";
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var fnBracketRegEx = /\(([^\)]*)\)/;
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var wsRegEx = /^\s+|\s+$/g;
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var requireRegExs = {};
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function getCJSDeps(source, requireIndex) {
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// remove comments
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source = source.replace(commentRegEx, '');
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// determine the require alias
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var params = source.match(fnBracketRegEx);
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var requireAlias = (params[1].split(',')[requireIndex] || 'require').replace(wsRegEx, '');
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// find or generate the regex for this requireAlias
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var requireRegEx = requireRegExs[requireAlias] || (requireRegExs[requireAlias] = new RegExp(cjsRequirePre + requireAlias + cjsRequirePost, 'g'));
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requireRegEx.lastIndex = 0;
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var deps = [];
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var match;
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while (match = requireRegEx.exec(source))
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deps.push(match[2] || match[3]);
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return deps;
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}
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/*
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AMD-compatible require
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To copy RequireJS, set window.require = window.requirejs = loader.amdRequire
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*/
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function require(names, callback, errback, referer) {
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// 'this' is bound to the loader
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var loader = this;
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// in amd, first arg can be a config object... we just ignore
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if (typeof names == 'object' && !(names instanceof Array))
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return require.apply(null, Array.prototype.splice.call(arguments, 1, arguments.length - 1));
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// amd require
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if (names instanceof Array)
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Promise.all(names.map(function(name) {
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return loader['import'](name, referer);
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})).then(function(modules) {
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if(callback) {
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callback.apply(null, modules);
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}
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}, errback);
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// commonjs require
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else if (typeof names == 'string') {
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return checkGetDefault(loader.get(names));
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}
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else
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throw new TypeError('Invalid require');
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};
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SystemJSLoader.prototype.amdRequire = function() {
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return require.apply(this, arguments);
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};
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function makeRequire(parentName, staticRequire, loader) {
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return function(names, callback, errback) {
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if (typeof names == 'string')
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return staticRequire(names);
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return require.call(loader, names, callback, errback, parentName);
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}
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}
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hookConstructor(function(constructor) {
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return function() {
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var loader = this;
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constructor.call(this);
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function define(name, deps, factory) {
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if (typeof name != 'string') {
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factory = deps;
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deps = name;
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name = null;
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}
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if (!(deps instanceof Array)) {
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factory = deps;
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deps = ['require', 'exports', 'module'];
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}
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if (typeof factory != 'function')
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factory = (function(factory) {
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return function() { return factory; }
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})(factory);
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// in IE8, a trailing comma becomes a trailing undefined entry
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if (deps[deps.length - 1] === undefined)
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deps.pop();
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// remove system dependencies
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var requireIndex, exportsIndex, moduleIndex;
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if ((requireIndex = indexOf.call(deps, 'require')) != -1) {
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deps.splice(requireIndex, 1);
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var factoryText = factory.toString();
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deps = deps.concat(getCJSDeps(factoryText, requireIndex));
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}
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if ((exportsIndex = indexOf.call(deps, 'exports')) != -1)
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deps.splice(exportsIndex, 1);
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if ((moduleIndex = indexOf.call(deps, 'module')) != -1)
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deps.splice(moduleIndex, 1);
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var define = {
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deps: deps,
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execute: function(require, exports, module) {
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var depValues = [];
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for (var i = 0; i < deps.length; i++)
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depValues.push(require(deps[i]));
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module.uri = loader.baseURL + module.id;
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module.config = function() {};
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// add back in system dependencies
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if (moduleIndex != -1)
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depValues.splice(moduleIndex, 0, module);
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if (exportsIndex != -1)
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depValues.splice(exportsIndex, 0, exports);
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if (requireIndex != -1)
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depValues.splice(requireIndex, 0, makeRequire(module.id, require, loader));
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var output = factory.apply(__global, depValues);
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if (typeof output == 'undefined' && module)
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output = module.exports;
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if (typeof output != 'undefined')
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return output;
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}
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};
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// anonymous define
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if (!name) {
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// already defined anonymously -> throw
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if (anonDefine)
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throw new TypeError('Multiple defines for anonymous module');
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anonDefine = define;
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}
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// named define
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else {
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// if it has no dependencies and we don't have any other
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// defines, then let this be an anonymous define
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if (deps.length == 0 && !anonDefine && !defineBundle)
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anonDefine = define;
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// otherwise its a bundle only
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else
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anonDefine = null;
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// the above is just to support single modules of the form:
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// define('jquery')
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// still loading anonymously
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// because it is done widely enough to be useful
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// note this is now a bundle
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defineBundle = true;
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// define the module through the register registry
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loader.registerDynamic(name, define.deps, false, define.execute);
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}
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};
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define.amd = {};
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loader.amdDefine = define;
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};
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});
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// script injection mode calls this function synchronously on load
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hook('onScriptLoad', function(onScriptLoad) {
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return function(load) {
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onScriptLoad.call(this, load);
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if (anonDefine || defineBundle) {
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load.metadata.format = 'defined';
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load.metadata.registered = true;
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}
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if (anonDefine) {
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load.metadata.deps = load.metadata.deps ? load.metadata.deps.concat(anonDefine.deps) : anonDefine.deps;
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load.metadata.execute = anonDefine.execute;
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}
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};
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});
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var anonDefine;
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// set to true if the current module turns out to be a named define bundle
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var defineBundle;
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var oldModule, oldExports, oldDefine;
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// adds define as a global (potentially just temporarily)
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function createDefine(loader) {
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anonDefine = null;
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defineBundle = null;
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// ensure no NodeJS environment detection
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oldModule = __global.module;
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oldExports = __global.exports;
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oldDefine = __global.define;
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__global.module = undefined;
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__global.exports = undefined;
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if (__global.define && __global.define === loader.amdDefine)
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return;
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__global.define = loader.amdDefine;
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}
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function removeDefine(loader) {
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__global.define = oldDefine;
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__global.module = oldModule;
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__global.exports = oldExports;
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}
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hook('fetch', function(fetch) {
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return function(load) {
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if (load.metadata.format === 'amd')
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load.metadata.scriptLoad = true;
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if (load.metadata.scriptLoad)
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createDefine(this);
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return fetch.call(this, load);
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};
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});
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hook('instantiate', function(instantiate) {
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return function(load) {
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var loader = this;
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if (load.metadata.format == 'amd' || !load.metadata.format && load.source.match(amdRegEx)) {
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load.metadata.format = 'amd';
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if (loader.execute !== false) {
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createDefine(loader);
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__exec(load);
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removeDefine(loader);
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if (!anonDefine && !defineBundle && !isNode)
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throw new TypeError('AMD module ' + load.name + ' did not define');
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}
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if (anonDefine) {
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load.metadata.deps = load.metadata.deps ? load.metadata.deps.concat(anonDefine.deps) : anonDefine.deps;
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load.metadata.execute = anonDefine.execute;
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}
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return instantiate.call(loader, load);
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}
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return instantiate.call(loader, load);
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};
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});
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})();
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