mirror of
https://github.com/systemjs/systemjs.git
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120 lines
4.0 KiB
JavaScript
120 lines
4.0 KiB
JavaScript
/*
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SystemJS CommonJS Format
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*/
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(function() {
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// CJS Module Format
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// require('...') || exports[''] = ... || exports.asd = ... || module.exports = ...
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var cjsExportsRegEx = /(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF.]|module\.)exports\s*(\[['"]|\.)|(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF.])module\.exports\s*[=,]/;
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// RegEx adjusted from https://github.com/jbrantly/yabble/blob/master/lib/yabble.js#L339
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var cjsRequireRegEx = /(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF."'])require\s*\(\s*("[^"\\]*(?:\\.[^"\\]*)*"|'[^'\\]*(?:\\.[^'\\]*)*')\s*\)/g;
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var commentRegEx = /(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;
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function getCJSDeps(source) {
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cjsRequireRegEx.lastIndex = commentRegEx.lastIndex = 0;
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var deps = [];
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// track comments in the source
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var match;
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var commentLocations = [];
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if (source.length / source.split('\n').length < 200) {
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while (match = commentRegEx.exec(source))
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commentLocations.push([match.index, match.index + match[0].length]);
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}
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while (match = cjsRequireRegEx.exec(source)) {
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// ensure we're not in a comment location
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var inComment = false;
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for (var i = 0; i < commentLocations.length; i++) {
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if (commentLocations[i][0] < match.index && commentLocations[i][1] > match.index + match[0].length)
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inComment = true;
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}
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if (!inComment)
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deps.push(match[1].substr(1, match[1].length - 2));
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}
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return deps;
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}
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if (typeof window != 'undefined' && typeof document != 'undefined' && window.location)
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var windowOrigin = location.protocol + '//' + location.hostname + (location.port ? ':' + location.port : '');
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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) {
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cjsExportsRegEx.lastIndex = 0;
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cjsRequireRegEx.lastIndex = 0;
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if (cjsRequireRegEx.exec(load.source) || cjsExportsRegEx.exec(load.source))
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load.metadata.format = 'cjs';
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}
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if (load.metadata.format == 'cjs') {
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var metaDeps = load.metadata.deps;
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var deps = getCJSDeps(load.source);
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for (var g in load.metadata.globals)
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deps.push(load.metadata.globals[g]);
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var entry = createEntry();
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load.metadata.entry = entry;
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entry.deps = deps;
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entry.executingRequire = true;
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entry.execute = function(require, exports, module) {
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// ensure meta deps execute first
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for (var i = 0; i < metaDeps.length; i++)
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require(metaDeps[i]);
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var address = load.address || '';
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var dirname = address.split('/');
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dirname.pop();
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dirname = dirname.join('/');
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if (address.substr(0, 8) == 'file:///') {
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address = address.substr(7);
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dirname = dirname.substr(7);
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// on windows remove leading '/'
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if (isWindows) {
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address = address.substr(1);
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dirname = dirname.substr(1);
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}
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}
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else if (windowOrigin && address.substr(0, windowOrigin.length) === windowOrigin) {
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address = address.substr(windowOrigin.length);
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dirname = dirname.substr(windowOrigin.length);
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}
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// disable AMD detection
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var define = __global.define;
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__global.define = undefined;
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__global.__cjsWrapper = {
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exports: exports,
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args: [require, exports, module, address, dirname, __global, __global]
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};
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var globals = '';
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if (load.metadata.globals) {
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for (var g in load.metadata.globals)
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globals += 'var ' + g + ' = require("' + load.metadata.globals[g] + '");';
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}
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load.source = "(function(require, exports, module, __filename, __dirname, global, GLOBAL) {" + globals
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+ load.source + "\n}).apply(__cjsWrapper.exports, __cjsWrapper.args);";
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__exec.call(loader, load);
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__global.__cjsWrapper = undefined;
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__global.define = define;
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};
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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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