mirror of
https://github.com/systemjs/systemjs.git
synced 2026-01-18 14:53:14 +00:00
734 lines
25 KiB
JavaScript
734 lines
25 KiB
JavaScript
/*
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* ES6 RequireJS-style module loader
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*
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* Supports RequireJS-inspired map, packages and plugins.
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*
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* https://github.com/jspm/jspm-loader
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*
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* MIT
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*
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*/
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(function() {
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(function() {
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var isBrowser = typeof window != 'undefined';
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var global = isBrowser ? window : {};
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var startConfig = global.jspm || {};
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var config = {};
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config.waitSeconds = 20;
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config.map = config.map || {};
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config.locations = config.locations || {};
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config.depends = config.depends || {};
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global.createLoader = function() {
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delete global.createLoader;
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config.baseURL = config.baseURL || isBrowser ? document.URL.substring(0, window.location.href.lastIndexOf('\/') + 1) : './';
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config.locations.plugin = config.locations.plugin || config.baseURL;
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// -- helpers --
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// es6 module regexs to check if it is a module or a global script
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var importRegEx = /^\s*import\s+./m;
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var exportRegEx = /^\s*export\s+(\{|\*|var|class|function|default)/m;
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var moduleRegEx = /^\s*module\s+("[^"]+"|'[^']+')\s*\{/m;
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// AMD and CommonJS regexs for support
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var amdDefineRegEx = /^\s*define\s*\(\s*("[^"]+"\s*,|'[^']+'\s*,)?\s*(\[(\s*("[^"]+"|'[^']+')\s*,)*(\s*("[^"]+"|'[^']+')\s*)?\])?/m;
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var cjsDefineRegEx = /^\s*define\s*\(\s*(function\s*|{|[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*\))/m;
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var cjsRequireRegEx = /\s*require\s*\(\s*("([^"]+)"|'([^']+)')\s*\)/gm;
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var cjsExportsRegEx = /\s*exports\s*\[\s*('[^']+'|"[^"]+")\s*\]|\exports\s*\.\s*[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*|exports\s*\=/m;
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// regex to check absolute urls
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var absUrlRegEx = /^\/|([^\:\/]*:\/\/)/;
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// function to remove the comments from a string
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function removeComments(str) {
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// output
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var curOutIndex = 0,
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outString = '';
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// mode variables
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var singleQuote = false,
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doubleQuote = false,
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regex = false,
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blockComment = false,
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doubleBackslash = false,
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lineComment = false;
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// character buffer
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var lastChar;
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var curChar = '';
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var lastToken;
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for (var i = 0, l = str.length; i <= l; i++) {
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lastChar = curChar;
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curChar = str.charAt(i);
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if (curChar === '\n' || curChar === '\r' || curChar === '') {
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regex = doubleQuote = singleQuote = doubleBackslash = false;
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if (lineComment) {
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curOutIndex = i + 1;
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lineComment = false;
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}
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lastToken = '';
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continue;
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}
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if (lastChar !== ' ' && lastChar !== '\t')
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lastToken = lastChar;
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if (singleQuote || doubleQuote || regex) {
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if (curChar == '\\' && lastChar == '\\')
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doubleBackslash = !doubleBackslash;
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}
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if (singleQuote) {
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if (curChar === "'" && (lastChar !== '\\' || doubleBackslash))
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singleQuote = doubleBackslash = false;
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}
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else if (doubleQuote) {
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if (curChar === '"' && (lastChar !== '\\' || doubleBackslash))
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doubleQuote = doubleBackslash = false;
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}
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else if (regex) {
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if (curChar === '/' && (lastChar !== '\\' || doubleBackslash)) {
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regex = doubleBackslash = false;
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i++;
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lastToken = lastChar = curChar;
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curChar = str.charAt(i);
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}
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}
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else if (blockComment) {
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if (curChar === '/' && lastChar === '*') {
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blockComment = false;
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curOutIndex = i + 1;
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}
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}
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else if (!lineComment) {
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doubleQuote = curChar === '"';
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singleQuote = curChar === "'";
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if (lastChar !== '/')
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continue;
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if (curChar === '*') {
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blockComment = true;
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outString += str.substring(curOutIndex, i - 1);
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i++;
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lastChar = curChar;
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curChar = str.charAt(i);
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}
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else if (curChar === '/') {
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lineComment = true;
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outString += str.substring(curOutIndex, i - 1);
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}
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else if (lastToken !== '}' && lastToken !== ')' && lastToken !== ']' && !lastToken.match(/\w|\d|'|"|\-|\+/)) {
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// exceptions not currently handled:
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// if (x) /foo/.exec('bar')
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// a++ /foo/.abc
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regex = true;
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}
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}
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}
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return outString + str.substr(curOutIndex);
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}
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// configuration object extension
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// objects extend, everything else replaces
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var extend = function(objA, objB) {
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for (var p in objB) {
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if (typeof objA[p] == 'object' && !(objA[p] instanceof Array))
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extend(objA[p], objB[p])
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else
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objA[p] = objB[p];
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}
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}
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// check if a module name starts with a given prefix
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// the key check is not to match the prefix 'jquery'
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// to the module name jquery-ui/some/thing, and only
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// to jquery/some/thing or jquery:some/thing
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// (multiple ':'s is a module name error)
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var prefixMatch = function(name, prefix) {
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var prefixParts = prefix.split(/[\/:]/);
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var nameParts = name.split(/[\/:]/);
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if (prefixParts.length > nameParts.length)
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return false;
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for (var i = 0; i < prefixParts.length; i++)
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if (nameParts[i] != prefixParts[i])
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return false;
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return true;
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}
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// check if the module is defined on a location
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var getLocation = function(name) {
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var locationParts = name.split(':');
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return locationParts[1] !== undefined && !name.match(absUrlRegEx) ? locationParts[0] : '';
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}
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// given a resolved module name and normalized parent name,
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// apply the map configuration
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var applyMap = function(name, parentName) {
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parentName = parentName || '';
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var location = getLocation(name);
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var parentLocation = getLocation(parentName);
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// if there is a parent location, and there is no location, add it here
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if (parentLocation && !location)
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name = parentLocation + ':' + name;
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// check for most specific map config
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var parentPrefixMatch = ''; // the matching parent refix
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var mapPrefixMatch = ''; // the matching map prefix
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var mapMatch = ''; // the matching map value
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for (var p in config.map) {
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var curMap = config.map[p];
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// do the global map check
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if (p == '*')
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continue;
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if (typeof curMap == 'string') {
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if (!prefixMatch(name, p))
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continue;
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if (p.length <= mapPrefixMatch.length)
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continue;
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mapPrefixMatch = p;
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mapMatch = curMap;
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}
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if (!prefixMatch(parentName, p))
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continue;
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// now check if this matches our current name
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for (var _p in curMap) {
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if (!prefixMatch(name, _p))
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continue;
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// the most specific mapPrefix wins first
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if (_p.length < mapPrefixMatch.length)
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continue;
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// then the most specific prefixMatch on the parent name
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if (_p.length == mapPrefixMatch.length && p.length < parentPrefixMatch.length)
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continue;
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parentPrefixMatch = p;
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mapPrefixMatch = _p;
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mapMatch = curMap[_p];
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}
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}
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// now compare against the global map config
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for (var _p in config.map['*'] || {}) {
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if (!prefixMatch(name, _p))
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continue;
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if (_p.length <= mapPrefixMatch.length)
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continue;
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mapPrefixMatch = _p;
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mapMatch = config.map['*'][_p];
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}
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// apply map config
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if (mapPrefixMatch)
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name = mapMatch + name.substr(mapPrefixMatch.length);
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return name;
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}
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// given a module's global dependencies, prepare the global object
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// to contain the union of the defined properties of its dependent modules
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var globalObj = {};
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function setGlobal(deps) {
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// first, we add all the dependency module properties to the global
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if (deps) {
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for (var i = 0; i < deps.length; i++) {
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var dep = deps[i];
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for (var m in dep)
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jspm.global[m] = dep[m];
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}
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}
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// now we store a complete copy of the global object
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// in order to detect changes
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for (var g in jspm.global) {
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if (jspm.global.hasOwnProperty(g))
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globalObj[g] = jspm.global[g];
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}
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}
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// go through the global object to find any changes
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// the differences become the returned global for this object
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// the global object is left as is
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function getGlobal() {
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var moduleGlobal = {};
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for (var g in jspm.global) {
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if (jspm.global.hasOwnProperty(g) && g != (isBrowser ? 'window' : 'global') && globalObj[g] != jspm.global[g])
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moduleGlobal[g] = jspm.global[g];
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}
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return moduleGlobal;
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}
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var pluginRegEx = /(\.[^\/\.]+)?!(.*)/;
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var nodeProcess = {
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nextTick: function(f) {
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setTimeout(f, 7);
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}
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};
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// -- /helpers --
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var jspm = global.jspm = new global.Loader({
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global: global,
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normalize: function(name, referer) {
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name = name.trim();
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// allow inline depends configuration
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var inlineShim;
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if (name.indexOf('|') != -1) {
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var inlineShim = name.split('|');
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name = inlineShim.splice(0, 1)[0].trim();
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}
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var parentName = referer && referer.name;
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// if it has a js extension, and not a url or plugin, remove the js extension
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if (!pluginMatch && name.substr(name.length - 3, 3) == '.js' && !name.match(absUrlRegEx))
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name = name.substr(0, name.length - 3);
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// check for a plugin (some/name!plugin)
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var pluginMatch = name.match(pluginRegEx);
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// if a plugin, remove the plugin part to do normalization
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var pluginName;
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if (pluginMatch) {
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pluginName = pluginMatch[2] || pluginMatch[1].substr(1);
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name = name.substr(0, name.length - pluginMatch[2].length - 1);
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}
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if (name.substr(0, 1) != '#') {
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// treat an initial '/' as location relative
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if (name.substr(0, 1) == '/')
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name = name.substr(1);
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// do standard normalization (resolve relative module name)
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name = global.System.normalize(name, referer);
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// do map config
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name = applyMap(name, parentName);
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}
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if (pluginName)
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name = name + '!' + pluginName;
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// apply inline depends configuration
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if (inlineShim) {
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// normalize inline depends
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for (var i = 0; i < inlineShim.length; i++)
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inlineShim[i] = jspm.normalize(inlineShim[i], { name: name });
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var sConfig = {};
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sConfig[name] = inlineShim;
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jspm.config({ depends: sConfig });
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}
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return name;
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},
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resolve: function(name, options) {
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var pluginMatch = name.match(pluginRegEx);
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// remove plugin part
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if (pluginMatch)
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name = name.substr(0, name.length - pluginMatch[2].length - 1);
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// ondemand
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for (var r in this.ondemandTable)
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if (this.ondemandTable[r].indexOf(name) != -1)
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return name;
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if (name.match(absUrlRegEx))
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return name;
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// locations
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var oldBaseURL = this.baseURL;
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var location = getLocation(name);
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if (location) {
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this.baseURL = config.locations[location];
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name = name.substr(location.length + 1);
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}
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var address = global.System.resolve.call(this, name, options);
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// remove js extension added if a plugin
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if (pluginMatch)
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address = address.substr(0, address.length - 3);
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this.baseURL = oldBaseURL;
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if (location)
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return address;
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else
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// cache bust local
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return address;// + '?' + (new Date()).getTime();
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},
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fetch: function(url, callback, errback, options) {
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options = options || {};
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var pluginMatch = (options.normalized || '').match(pluginRegEx);
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if (!pluginMatch) {
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// do a fetch with a timeout
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var rejected = false;
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if (config.waitSeconds) {
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var waitTime = 0;
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setTimeout(function() {
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waitTime++;
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if (waitTime >= config.waitSeconds) {
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rejected = true;
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errback();
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}
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}, 1000);
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}
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global.System.fetch(url, function(source) {
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if (!rejected)
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callback(source);
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}, errback, options);
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return;
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}
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// for plugins, we first need to load the plugin module itself
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var pluginName = pluginMatch[2];
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jspm.import('plugin:' + pluginName, function(plugin) {
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plugin(options.normalized.substr(0, options.normalized.indexOf('!')), url, jspm.fetch, callback, errback);
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});
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},
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link: function(source, options) {
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source = source || '';
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if (config.onLoad)
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config.onLoad(options.normalized, source, options);
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if (source.match(importRegEx) || source.match(exportRegEx) || source.match(moduleRegEx))
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return;
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// remove comments before doing regular expressions
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source = removeComments(source);
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var match;
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// depends config
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var _imports = config.depends[options.normalized] ? [].concat(config.depends[options.normalized]) : [];
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// check if this module uses AMD form
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// define([.., .., ..], ...)
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// define('modulename', [.., ..., ..])
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if ((match = source.match(amdDefineRegEx)) && (match[2] || match[1])) {
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_imports = _imports.concat(eval(match[2] || '[]'));
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// remove any reserved words
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var requireIndex, exportsIndex, moduleIndex;
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if ((requireIndex = _imports.indexOf('require')) != -1)
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_imports.splice(requireIndex, 1);
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if ((exportsIndex = _imports.indexOf('exports')) != -1)
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_imports.splice(exportsIndex, 1);
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if ((moduleIndex = _imports.indexOf('module')) != -1)
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_imports.splice(moduleIndex, 1);
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return {
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imports: _imports,
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execute: function() {
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var deps = Array.prototype.splice.call(arguments, 0);
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// add system dependencies
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var exports;
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if (moduleIndex != -1)
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deps.splice(moduleIndex, 0, { id: options.normalized, uri: options.address });
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if (exportsIndex != -1)
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deps.splice(exportsIndex, 0, exports = {});
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if (requireIndex != -1)
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deps.splice(requireIndex, 0, function(names, callback, errback) {
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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));
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return jspm.require(names, callback, errback, { name: options.normalized, address: options.address });
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});
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var output;
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jspm.global.require = jspm.global.requirejs = jspm.require;
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jspm.global.define = function(name, dependencies, factory) {
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// anonymous define
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if (typeof name != 'string') {
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factory = dependencies;
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name = undefined;
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}
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// no dependencies
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if (!(dependencies instanceof Array))
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factory = dependencies;
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// run the factory function
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if (typeof factory == 'function')
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output = factory.apply(jspm.global, deps);
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// otherwise factory is the value
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else
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output = factory;
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if (name && name != options.normalized)
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jspm.set(name, { default: output });
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}
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jspm.global.define.amd = {};
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scopedEval(source, jspm.global, options.address);
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delete jspm.global.define;
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delete jspm.global.require;
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delete jspm.global.requirejs;
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return new global.Module({ 'default': output || exports });
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}
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};
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}
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// check if it uses the AMD CommonJS form
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// define(varName); || define(function() {}); || define({})
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if (source.match(cjsDefineRegEx)) {
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var match;
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while (match = cjsRequireRegEx.exec(source))
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_imports.push(match[2] || match[3]);
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return {
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imports: _imports,
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execute: function() {
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var depMap = {};
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for (var i = 0; i < _imports.length; i++)
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depMap[_imports[i]] = arguments[i]['default'] || arguments[i];
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var exports = {};
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var module = { id: options.normalized, uri: options.address };
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jspm.global.require = jspm.global.requirejs = jspm.require;
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var output;
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jspm.global.define = function(factory) {
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output = typeof factory == "function" ? factory.call(jspm.global, function(d) {
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return depMap[d];
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}, exports) : factory;
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};
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jspm.global.define.amd = {};
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scopedEval(source, jspm.global, options.address);
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|
|
delete jspm.global.require;
|
|
delete jspm.global.requirejs;
|
|
delete jspm.global.define;
|
|
|
|
return new global.Module({ 'default': output || exports });
|
|
}
|
|
};
|
|
}
|
|
|
|
// CommonJS
|
|
// require('...') || exports[''] = ... || exports.asd = ... || module.exports = ...
|
|
if (source.match(cjsExportsRegEx) || source.match(cjsRequireRegEx)) {
|
|
var match;
|
|
while (match = cjsRequireRegEx.exec(source))
|
|
_imports.push(match[2] || match[3]);
|
|
|
|
return {
|
|
imports: _imports, // clone the array as we still need it
|
|
execute: function(deps) {
|
|
var depMap = {};
|
|
for (var i = 0; i < _imports.length; i++)
|
|
depMap[_imports[i]] = arguments[i]['default'] || arguments[i];
|
|
var exports = {};
|
|
var dirname = options.address.split('/');
|
|
dirname.pop();
|
|
dirname = dirname.join('/');
|
|
var _global = {
|
|
process: nodeProcess,
|
|
console: console,
|
|
require: function(d) {
|
|
return depMap[d]
|
|
},
|
|
__filename: options.address,
|
|
__dirname: dirname,
|
|
module: { exports: exports },
|
|
exports: exports
|
|
};
|
|
var process = _global.process;
|
|
var require = _global.require;
|
|
var __filename = _global.__filename;
|
|
var __dirname = _global.__dirname;
|
|
var module = _global.module;
|
|
var exports = _global.exports;
|
|
eval(source + (options.address ? '\n//# sourceURL=' + options.address : ''));
|
|
return new global.Module({ 'default': _global.module.exports });
|
|
}
|
|
};
|
|
}
|
|
|
|
// global script
|
|
return {
|
|
// apply depends config
|
|
imports: _imports,
|
|
execute: function(deps) {
|
|
if (source == '')
|
|
return new global.Module({});
|
|
setGlobal(deps);
|
|
scopedEval(source, jspm.global, options.address);
|
|
return new global.Module(getGlobal());
|
|
}
|
|
};
|
|
}
|
|
});
|
|
|
|
var _import = jspm.import;
|
|
jspm.import = function(name, callback, errback, referer) {
|
|
_import.call(jspm, name, function() {
|
|
var newArgs = [];
|
|
for (var i = 0; i < arguments.length; i++) {
|
|
var isDefaultOnly = true;
|
|
for (var q in arguments[i])
|
|
if (arguments[i].hasOwnProperty(q)) {
|
|
if (q != 'default') {
|
|
isDefaultOnly = false;
|
|
break;
|
|
}
|
|
}
|
|
if (isDefaultOnly && arguments[i] && arguments[i].default)
|
|
newArgs[i] = arguments[i].default;
|
|
else
|
|
newArgs[i] = arguments[i];
|
|
}
|
|
if (callback)
|
|
callback.apply(null, newArgs);
|
|
}, errback, referer);
|
|
}
|
|
|
|
jspm.baseURL = config.baseURL;
|
|
|
|
// ondemand functionality
|
|
jspm.ondemandTable = {};
|
|
jspm.ondemand = global.System.ondemand;
|
|
|
|
jspm._config = config;
|
|
jspm.config = function(newConfig) {
|
|
if (newConfig.paths)
|
|
extend(newConfig.map = newConfig.map || {}, newConfig.paths);
|
|
|
|
if (newConfig.packages)
|
|
throw 'Package configuration not support';
|
|
|
|
extend(config, newConfig);
|
|
|
|
if (newConfig.baseURL)
|
|
jspm.baseURL = newConfig.baseURL;
|
|
if (newConfig.baseUrl)
|
|
jspm.baseURL = newConfig.baseUrl;
|
|
}
|
|
jspm.ondemand = function(resolvers) {
|
|
jspm.ondemand(resolvers);
|
|
}
|
|
|
|
/*
|
|
AMD & CommonJS-compatible require
|
|
To copy RequireJS, set window.require = window.requirejs = jspm.require
|
|
*/
|
|
jspm.require = function(names, callback, errback, referer) {
|
|
// in amd, first arg can be a config object
|
|
if (typeof names == 'object' && !(names instanceof Array)) {
|
|
jspm.config(names);
|
|
return jspm.require.apply(null, Array.prototype.splice.call(arguments, 1));
|
|
}
|
|
|
|
if (typeof callback == 'object') {
|
|
referer = callback;
|
|
callback = undefined;
|
|
}
|
|
else if (typeof errback == 'object') {
|
|
referer = errback;
|
|
errback = undefined;
|
|
}
|
|
|
|
// amd require
|
|
if (names instanceof Array)
|
|
return jspm.import(names, callback, errback, referer);
|
|
|
|
// commonjs require
|
|
else if (typeof names == 'string')
|
|
return jspm.get(names);
|
|
|
|
else
|
|
throw 'Invalid require';
|
|
}
|
|
jspm.require.config = jspm.config;
|
|
|
|
// add convenience locations
|
|
jspm.config({
|
|
locations: {
|
|
github: 'https://github.jspm.io',
|
|
npm: 'https://npm.jspm.io',
|
|
cdnjs: 'https://cdnjs.cloudflare.com/ajax/libs',
|
|
jspm: 'https://registry.jspm.io',
|
|
plugin: 'https://github.jspm.io/jspm/plugins@0.0.6'
|
|
}
|
|
});
|
|
|
|
// add initial config
|
|
jspm.config(startConfig);
|
|
|
|
if (!isBrowser)
|
|
module.exports = jspm;
|
|
}
|
|
|
|
// dynamically polyfill the es6 loader if necessary
|
|
if (!global.Loader) {
|
|
if (isBrowser) {
|
|
// determine the current script path as the base path
|
|
var scripts = document.getElementsByTagName('script');
|
|
var head = document.getElementsByTagName('head')[0];
|
|
var curPath = scripts[scripts.length - 1].src;
|
|
var basePath = curPath.substr(0, curPath.lastIndexOf('/') + 1);
|
|
document.write(
|
|
'<' + 'script type="text/javascript" src="' + basePath + 'es6-module-loader.js">' + '<' + '/script>' +
|
|
'<' + 'script type="text/javascript">' + 'createLoader();' + '<' + '/script>'
|
|
);
|
|
}
|
|
else {
|
|
var es6ModuleLoader = require('es6-module-loader');
|
|
global.System = es6ModuleLoader.System;
|
|
global.Loader = es6ModuleLoader.Loader;
|
|
global.Module = es6ModuleLoader.Module;
|
|
global.createLoader();
|
|
}
|
|
}
|
|
else
|
|
createLoader();
|
|
|
|
})();
|
|
|
|
// carefully scoped eval with given global
|
|
var scopedEval = function(source, global, sourceURL) {
|
|
eval('(function(global) { with(global) { ' + source + ' } }).call(global, global);' + (sourceURL ? '\n//# sourceURL=' + sourceURL : ''));
|
|
}
|
|
|
|
})();
|