source map extraction to only use // comments, node 6 support

lib/builder.js

@@ -5,7 +5,6 @@ var asp = require('bluebird').promisify;
 var fs = require('fs');
 var path = require('path');
 
-var sourceMappingURL = require('source-map-url');
 var dataUriToBuffer = require('data-uri-to-buffer');
 
 var extend = require('./utils').extend;
@@ -192,23 +191,24 @@ Builder.prototype.reset = function(baseLoader) {
         });
       })
     }))
+
+    // support picking up source URLs during fetch to set as metadata.sourceMap
     .then(function (source) {
-      var metadata = load.metadata;
-      if (metadata.sourceMap)
+      if (load.metadata.sourceMap)
         return source;
-      var sourceMap = sourceMappingURL.getFrom(source);
+      var sourceMap = source.match(/\s*\/\/\s*[#@] sourceMappingURL=([^\s'"]*)/m);
       if (!sourceMap)
         return source;
-      source = sourceMappingURL.removeFrom(source);
-      if (sourceMap.startsWith('data:')) {
+      if (sourceMap[1].startsWith('data:')) {
         // inline source map
-        metadata.sourceMap = JSON.parse(dataUriToBuffer(sourceMap).toString('utf8'));
+        load.metadata.sourceMap = JSON.parse(dataUriToBuffer(sourceMap[1]).toString('utf8'));
         return source;
-      } else {
+      }
+      else {
         // relative path to the .map file
-        var sourceMapPath = path.join(path.dirname(fromFileURL(load.address)), sourceMap);
+        var sourceMapPath = path.join(path.dirname(fromFileURL(load.address)), sourceMap[1]);
         return asp(fs.readFile)(sourceMapPath, 'utf8').then(function (sourceMap) {
-          metadata.sourceMap = JSON.parse(sourceMap);
+          load.metadata.sourceMap = JSON.parse(sourceMap);
           return source;
         });
       }
@@ -306,7 +306,9 @@ function executeConfigFile(saveForReset, ignoreBaseURL, configPath, source) {
   // and prevent that code from adding anything to the real global 
   var context = Object.create(global);
   context.SystemJS = context.System = configLoader;
-  context.global = context.GLOBAL = context.root = context;
+  context.global = context;
+  if (process.versions.node && process.versions.node.split('.')[0] <= 6)
+    context.GLOBAL = context.root = context;
   // make require available too, make it look as if config file was
   // loaded like a module
   var Module = require('module');

package.json

@@ -13,7 +13,6 @@
     "mkdirp": "^0.5.1",
     "rollup": "^0.25.0",
     "source-map": "^0.5.3",
-    "source-map-url": "^0.4.0",
     "systemjs": "^0.19.28",
     "traceur": "0.0.105",
     "uglify-js": "^2.6.1"