fix: User file.uuid for the newly created group's fileRef instead of generating a new uuid

Generating a new uuid for the fileRef section will have folders as folder references instead of groups

Author: tdermendjiev

lib/pbxProject.js

@@ -1,7 +1,7 @@
 var util = require('util'),
     f = util.format,
     EventEmitter = require('events').EventEmitter,
-    $path = require('path'),
+    path = require('path'),
     uuid = require('node-uuid'),
     fork = require('child_process').fork,
     pbxWriter = require('./pbxWriter'),
@@ -291,7 +291,7 @@ pbxProject.prototype.findMainPbxGroup = function () {
     var groups = this.hash.project.objects['PBXGroup'];
     var candidates = [];
     for (var key in groups) {
-        if (groups[key].path == undefined && groups[key].name == undefined && groups[key].isa) {
+        if (!groups[key].path && !groups[key].name && groups[key].isa) {
             candidates.push(groups[key]);
         }
     }
@@ -304,7 +304,7 @@ pbxProject.prototype.findMainPbxGroup = function () {
 
 pbxProject.prototype.addPbxGroup = function (filePathsArray, name, path, sourceTree, opt) {
     var groups = this.hash.project.objects['PBXGroup'],
-        pbxGroupUuid = opt.uuid ? opt.uuid : this.generateUuid(),
+        pbxGroupUuid = opt.uuid || this.generateUuid(),
         commentKey = f("%s_comment", pbxGroupUuid),
         pbxGroup = {
             isa: 'PBXGroup',
@@ -340,7 +340,7 @@ pbxProject.prototype.addPbxGroup = function (filePathsArray, name, path, sourceT
         var file = new pbxFile(filePath);
         if (fs.lstatSync(filePath).isDirectory()) {
             file.uuid = this.generateUuid();
-            file.fileRef = this.generateUuid();
+            file.fileRef = file.uuid;
             this.addToPbxFileReferenceSection(file);    // PBXFileReference
             this.addToPbxBuildFileSection(file);
             pbxGroup.children.push(pbxGroupChild(file));