TypeScript support (squashed)

Original commit messages:

* initial version of TypeScript support
* added typescript as a transpiler to karma.conf
* add typescript dependency to package.json
* allow TypeScript options to be set from the outside
* updated README.md
* added typescript to .travis.yml
* set CompilerOptions.target if it was not assigned before
* reverted changes in dist
* do not inline source file contents by default

Author: vladima

.travis.yml

@@ -13,12 +13,15 @@ env:
   matrix:
     - PARSER="traceur"
     - PARSER="babel"
+    - PARSER="typescript"
 matrix:
   include:
     - node_js: "0.10"
       env: SAUCE_LABS=true PARSER="traceur"
     - node_js: "0.10"
       env: SAUCE_LABS=true PARSER="babel"
+    - node_js: "0.10"
+      env: SAUCE_LABS=true PARSER="typescript"
 #    - node_js: "0.10"
 #      env: SAUCE_LABS=true PARSER="traceur" OPTIONS="--ie8"
 #    - node_js: "0.10"

README.md

@@ -7,7 +7,7 @@ Dynamically loads ES6 modules in browsers and [NodeJS](#nodejs-use) with support
 This project implements dynamic module loading through `System` exactly to the previous ES6-specified loader API at [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). The new loader implementing the [WhatWG loader spec](https://github.com/whatwg/loader) is pending alpha release on the [1.0 branch](https://github.com/ModuleLoader/es6-module-loader/tree/1.0).
 
 * Provides an asynchronous loader (`System.import`) to [dynamically load ES6 modules](#getting-started).
-* Supports both [Traceur](https://github.com/google/traceur-compiler) and [Babel](http://babeljs.io/) for compiling ES6 modules and syntax into ES5 in the browser with source map support.
+* Supports [Traceur](https://github.com/google/traceur-compiler), [Babel](http://babeljs.io/) and [TypeScript](https://github.com/Microsoft/TypeScript/) for compiling ES6 modules and syntax into ES5 in the browser with source map support.
 * Fully supports [ES6 circular references and live bindings](https://github.com/ModuleLoader/es6-module-loader/wiki/Circular-References-&-Bindings).
 * Includes [`baseURL` and `paths` implementations](https://github.com/ModuleLoader/es6-module-loader/wiki/Configuring-the-Loader).
 * Can be used as a [tracing tool](https://github.com/ModuleLoader/es6-module-loader/wiki/Tracing-API) for static analysis of modules.
@@ -30,7 +30,7 @@ For an example of a universal module loader based on this polyfill for loading A
 
 ### Getting Started
 
-If using ES6 syntax (optional), include `traceur.js` or `babel.js` in the page first then include `es6-module-loader.js`:
+If using ES6 syntax (optional), include `traceur.js`, `babel.js` or `typescript.js` in the page first then include `es6-module-loader.js`:
 
 ```html
   <script src="traceur.js"></script>
@@ -45,6 +45,14 @@ To use Babel, load Babel's `browser.js` instead and set the transpiler to `babel
 </script>
 ```
 
+To use TypeScript, set the transpiler to `typescript` in the loader configuration:
+
+```html
+<script>
+  System.transpiler = 'typescript';
+</script>
+```
+
 Then we can write any ES6 module:
 
 mymodule.js:
@@ -76,12 +84,18 @@ If using Traceur, these can be set with:
 System.traceurOptions = {...};
 ```
 
-Or with Babel:
+With Babel:
 
 ```javascript
 System.babelOptions = {...};
 ```
 
+With TypeScript:
+
+```javascript
+System.typescriptOptions = {...};
+```
+
 #### Module Tag
 
 As well as defining `window.System`, this polyfill provides support for the `<script type="module">` tag:
@@ -102,10 +116,10 @@ See the [demo folder](https://github.com/ModuleLoader/es6-module-loader/blob/mas
 #### NodeJS Use
 
 ```
-  npm install es6-module-loader babel traceur
+  npm install es6-module-loader babel traceur typescript
 ```
 
-It is important that Babel or Traceur is installed into the path in order to be found, since these are no longer project dependencies.
+It is important that Babel, Traceur or TypeScript is installed into the path in order to be found, since these are no longer project dependencies.
 
 For use in NodeJS, the `Loader` and `System` globals are provided as exports:
 
@@ -115,7 +129,9 @@ index.js:
   /*  
    *  Include:
    *    System.transpiler = 'babel'; 
-   *  to use Babel instead of Traceur
+   *  to use Babel instead of Traceur or
+   *    System.transpiler = 'typescript';
+   *  to use TypeScript
    */
 
   System.import('some-module').then(function(m) {
@@ -142,8 +158,8 @@ _Also, please don't edit files in the "dist" subdirectory as they are generated
 ## Testing
 
 - `npm run test:node` will use node to  to run the tests
-- `npm run test:browser` will run `npm run test:browser-babel` and `npm run test:browser-traceur`
-- `npm run test:browser-[transpiler]` use karma to run the tests with Traceur or Babel.
+- `npm run test:browser` will run `npm run test:browser-babel`, `npm run test:browser-traceur` and `npm run test:browser-typescript`
+- `npm run test:browser-[transpiler]` use karma to run the tests with Traceur, Babel or TypeScript.
 - `npm run test:browser:perf` will use karma to run benchmarks
 
 `npm run test:browser-[transpiler]` supports options after a double dash (`--`) :

index.js

@@ -17,6 +17,10 @@ try {
   System.paths.babel = System.paths.babel || filePrefix + require.resolve('babel/browser.js');
 }
 catch(e) {}
+try {
+  System.paths.typescript = filePrefix + require.resolve('typescript/bin/typescript.js');
+}
+catch(e) { }
 
 module.exports = {
   Loader: global.LoaderPolyfill,

karma.conf.js

@@ -30,14 +30,19 @@ if (options.saucelabs) {
 }
 
 ////
-
 module.exports = function(config) {
 
   var files = [
     'test/_helper.js',
     [options['babel'] ? 'node_modules/regenerator/runtime.js' : ''],
 
-    [!options.ie8 ? (!options['babel'] ? 'node_modules/traceur/bin/traceur.js' : 'node_modules/babel-core/browser.js') : ''],
+    [!options.ie8 
+        ? (options['babel'] 
+            ? 'node_modules/babel-core/browser.js' 
+            : options['typescript']  
+                ? 'node_modules/typescript/bin/typescript.js' 
+                : 'node_modules/traceur/bin/traceur.js') 
+        : ''],
 
     [options.polyfill ? 'node_modules/when/es6-shim/Promise' : ''],
     'dist/es6-module-loader-dev.src.js',
@@ -51,10 +56,10 @@ module.exports = function(config) {
     {pattern: 'test/{loader,loads,syntax,worker}/**/*', included: false},
     {pattern: 'node_modules/traceur/bin/traceur.js', included: false},
     {pattern: 'node_modules/babel-core/browser.js', included: false},
+    {pattern: 'node_modules/typescript/bin/typescript.js', included: false},
     {pattern: 'node_modules/when/es6-shim/Promise.js', included: false},
     {pattern: 'dist/es6-module-loader*.js', included: false}
   ];
-
   // Default Config
   config.set({
     basePath: '',
@@ -68,7 +73,11 @@ module.exports = function(config) {
         timeout: 8000
       },
       system: {
-        transpiler: options.babel ? 'babel' : 'traceur'
+        transpiler: options.babel 
+            ? 'babel'
+            : options.typescript
+                ? 'typescript'
+                : 'traceur'
       }
     }
   });

package.json

@@ -42,7 +42,8 @@
     "minimist": "^1.1.0",
     "mocha": "^2.0.1",
     "regenerator": "^0.8.9",
-    "traceur": "0.0.87"
+    "traceur": "0.0.87",
+    "typescript": "mhegazy/typescript#v1.5-beta2"
   },
   "keywords": [
     "script",
@@ -55,10 +56,11 @@
   },
   "scripts": {
     "test": "npm run test:node && npm run test:browser",
-    "test:node": "mocha test/_node-traceur.js && mocha test/_node-babel.js",
-    "test:browser": "npm run test:browser-traceur && npm run test:browser-babel",
+    "test:node": "mocha test/_node-traceur.js && mocha test/_node-babel.js && mocha test/_node-typescript.js",
+    "test:browser": "npm run test:browser-traceur && npm run test:browser-babel && npm run test:browser-typescript",
     "test:browser-traceur": "karma start --single-run",
     "test:browser-babel": "karma start --single-run --babel",
+    "test:browser-typescript": "karma start --single-run --typescript",
     "test:browser:perf": "karma start karma-benchmark.conf.js --single-run"
   },
   "dependencies": {

src/declarative.js

@@ -100,7 +100,6 @@
           };
           load.status = 'linked';
         }
-
         finishLoad(loader, load);
       }
 
@@ -140,8 +139,11 @@
       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](moduleObj);
+          for (var j = 0; j < importerModule.dependencies.length; ++j) {
+            if (importerModule.dependencies[j] === module) {
+              importerModule.setters[j](moduleObj);
+            }
+          }
         }
       }
 
@@ -283,4 +285,4 @@
     module.execute = undefined;
     return err;
   }
-})();
+})();

src/transpiler.js

@@ -1,5 +1,5 @@
 /*
- * Traceur and Babel transpile hook for Loader
+ * Traceur, Babel and TypeScript transpile hook for Loader
  */
 
 function setupTranspilers(loader) {
@@ -8,6 +8,8 @@ function setupTranspilers(loader) {
     loader.set('traceur', loader.newModule({ 'default': __global.traceur, __useDefault: true }));
   if (__global.babel && !loader.has('babel'))
     loader.set('babel', loader.newModule({ 'default': __global.babel, __useDefault: true }));
+  if (__global.ts && !loader.has('typescript'))
+    loader.set('typescript', loader.newModule({ 'default': __global.ts, __useDefault: true }));
 }
 
 var transpile = (function() {
@@ -17,13 +19,24 @@ var transpile = (function() {
 
   function transpile(load) {
     var self = this;
-    
+
     return (self.pluginLoader || self)['import'](self.transpiler).then(function(transpiler) {
       if (transpiler.__useDefault)
         transpiler = transpiler['default'];
 
+      var transpileFunction;
+      if (transpiler.Compiler) {
+        transpileFunction = traceurTranspile;
+      }
+      else if (transpiler.createLanguageService) {
+        transpileFunction = typescriptTranspile;
+      }
+      else {
+        transpileFunction = babelTranspile;
+      }
+
       return 'var __moduleName = "' + load.name + '", __moduleAddress = "' + load.address + '";'
-          + (transpiler.Compiler ? traceurTranspile : babelTranspile).call(self, load, transpiler)
+          + transpileFunction.call(self, load, transpiler)
           + '\n//# sourceURL=' + load.address + '!eval';
 
       // sourceURL and sourceMappingURL:
@@ -49,7 +62,7 @@ var transpile = (function() {
             __eval('(function(require,exports,module){' + load.source + '})();', load.address, __global);
             __global.System = curSystem;
             __global.Reflect.Loader = curLoader;
-            return self.newModule({ 'default': __global[self.transpiler], __useDefault: true });
+            return self.newModule({ 'default': __global[self.transpiler == 'typescript' ? 'ts' : self.transpiler], __useDefault: true });
           }
         };
       }
@@ -90,5 +103,17 @@ var transpile = (function() {
     return babel.transform(load.source, options).code;
   }
 
+  function typescriptTranspile(load, ts) {
+    var options = this.typescriptOptions || {};
+    if (options.target === undefined) {
+      options.target = ts.ScriptTarget.ES5;
+    }
+    options.module = ts.ModuleKind.System;
+    options.inlineSourceMap = true;
+
+    var source = ts.transpile(load.source, options, load.address);
+    return source + '\n//# sourceURL=' + load.address + '!eval';;
+  }
+
   return transpile;
-})();
+})();

test/_browser.js

@@ -4,5 +4,6 @@ System.baseURL += 'base/';
 
 System.paths.traceur = 'node_modules/traceur/bin/traceur.js';
 System.paths.babel = 'node_modules/babel-core/browser.js';
+System.paths.typescript = 'node_modules/typescript/bin/typescript.js';
 
 System.transpiler = __karma__.config.system.transpiler;

test/_node-typescript.js

@@ -0,0 +1,14 @@
+'use strict';
+
+global.expect = require('expect.js');
+
+require('./_helper');
+
+global.System = require('../index').System;
+global.ts = require('typescript');
+global.System.transpiler = 'typescript';
+
+require('./system.spec');
+
+require('./custom-loader');
+require('./custom-loader.spec');

test/system.spec.js

@@ -51,7 +51,7 @@ describe('System', function () {
       it('should support set, get and delete', function(done) {
 
         var testPath = System.baseURL + 'test/loader/module.js';
-  
+
         System.import(testPath).then(function(m) {
           expect(m.run).to.equal('first');
           System.delete(testPath);
@@ -88,7 +88,8 @@ describe('System', function () {
           .then(done, done);
       });
 
-      (ie ? it.skip : it)('should import an ES6 script with a generator', function (done) {
+      // typescript does not support generators yet
+      (ie || System.transpiler === 'typescript' ? it.skip : it)('should import an ES6 script with a generator', function (done) {
         System.import('test/syntax/es6-generator.js')
           .then(function (m) {
             expect(!!m.generator).to.be.ok();
@@ -395,7 +396,7 @@ describe('System', function () {
     });
 
   });
-  
+
   describe('#System.define', function () {
 
     it.skip('should load System.define', function(done) {