Add helper filetypeForProducttype() method for resolving filetypes for product types.

Author: sidneys

lib/pbxProject.js

@@ -1300,6 +1300,24 @@ function producttypeForTargettype (targetType) {
     return PRODUCTTYPE_BY_TARGETTYPE[targetType]
 }
 
+function filetypeForProducttype (productType) {
+
+    FILETYPE_BY_PRODUCTTYPE = {
+            'com.apple.product-type.application': '"wrapper.application"',
+            'com.apple.product-type.app-extension': '"wrapper.app-extension"',
+            'com.apple.product-type.bundle': '"wrapper.plug-in"',
+            'com.apple.product-type.tool': '"compiled.mach-o.dylib"',
+            'com.apple.product-type.library.dynamic': '"compiled.mach-o.dylib"',
+            'com.apple.product-type.framework': '"wrapper.framework"',
+            'com.apple.product-type.library.static': '"archive.ar"',
+            'com.apple.product-type.bundle.unit-test': '"wrapper.cfbundle"',
+            'com.apple.product-type.application.watchapp': '"wrapper.application"',
+            'com.apple.product-type.watchkit-extension': '"wrapper.app-extension"'
+        };
+
+    return FILETYPE_BY_PRODUCTTYPE[productType]
+}
+
 pbxProject.prototype.getFirstProject = function() {
 
     // Get pbxProject container