angular-cn/modules/angular2/test/compiler/eval_module.ts

45 lines
1.8 KiB
TypeScript

import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
import {isPresent, global, StringWrapper} from 'angular2/src/facade/lang';
var evalCounter = 0;
var MODULE_URL_REGEX = /^package:(.*)\.js/;
function nextModuleId() {
return `evalScript${evalCounter++}`;
}
export function evalModule(moduleSource: string, imports: string[][], args: any[]): Promise<any> {
var moduleId = nextModuleId();
var moduleSourceWithImports = [];
var importModuleIds = [];
imports.forEach(sourceImport => {
var modUrl = sourceImport[0];
var modMatch = MODULE_URL_REGEX.exec(modUrl);
if (!modMatch) {
throw new Error(`Module url ${modUrl} does not match the pattern ${MODULE_URL_REGEX}`);
}
var modId = modMatch[1];
var modAlias = sourceImport[1];
importModuleIds.push(modId);
// Note: After transpilation to commonJS and loading this file in a browser
// using SystemJS, the loader might get confused by the presence of require,
// and attempt to load "+ modName +.js" !?!
// A simple string concat manages to prevent that, but that is one compiler
// optimaztion away from breaking again. Proceed with caution!
moduleSourceWithImports.push(`var ${modAlias} = require` + `('${modId}');`);
});
moduleSourceWithImports.push(moduleSource);
var moduleBody = new Function('require', 'exports', 'module', moduleSourceWithImports.join('\n'));
var System = global['System'];
if (isPresent(System) && isPresent(System.registerDynamic)) {
System.registerDynamic(moduleId, importModuleIds, false, moduleBody);
return <Promise<any>>System.import(moduleId).then((module) => module.run(args));
} else {
var exports = {};
moduleBody(require, exports, {});
return PromiseWrapper.resolve(exports['run'](args));
}
}