separate transpiler loading into loader-specific implementation

Author: guybedford

src/system-resolve.js

@@ -20,4 +20,28 @@ SystemLoader.prototype.normalize = function(name, parentName, parentAddress) {
 
 SystemLoader.prototype.locate = function(load) {
   return load.name;
+};
+
+
+// ensure the transpiler is loaded correctly
+SystemLoader.prototype.instantiate = function(load) {
+  var self = this;
+  return Promise.resolve(self.normalize(self.transpiler))
+  .then(function(transpilerNormalized) {
+    // load transpiler as a global (avoiding System clobbering)
+    if (load.address === transpilerNormalized) {
+      return {
+        deps: [],
+        execute: function() {
+          var curSystem = __global.System;
+          var curLoader = __global.Reflect.Loader;
+          // ensure not detected as CommonJS
+          __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 });
+        }
+      };
+    }
+  });
 };

src/transpiler.js

@@ -9,7 +9,7 @@ var transpile = (function() {
   function transpile(load) {
     var self = this;
 
-    return Promise.resolve(__global[self.transpiler == 'typescript' ? 'ts' : self.transpiler] 
+    return Promise.resolve(__global[self.transpiler == 'typescript' ? 'ts' : self.transpiler]
         || (self.pluginLoader || self)['import'](self.transpiler))
     .then(function(transpiler) {
       if (transpiler.__useDefault)
@@ -36,28 +36,6 @@ var transpile = (function() {
     });
   };
 
-  Loader.prototype.instantiate = function(load) {
-    var self = this;
-    return Promise.resolve(self.normalize(self.transpiler))
-    .then(function(transpilerNormalized) {
-      // load transpiler as a global (avoiding System clobbering)
-      if (load.address === transpilerNormalized) {
-        return {
-          deps: [],
-          execute: function() {
-            var curSystem = __global.System;
-            var curLoader = __global.Reflect.Loader;
-            // ensure not detected as CommonJS
-            __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 });
-          }
-        };
-      }
-    });
-  };
-
   function traceurTranspile(load, traceur) {
     var options = this.traceurOptions || {};
     options.modules = 'instantiate';