in short:
var data = String($.NSString.stringWithContentsOfFileEncodingError($.NSBundle.mainBundle.pathForResourceOfType('embedded', 'mobileprovision'), $.NSISOLatin1StringEncoding, null));
data = data.slice(data.indexOf('<plist'));
data = data.slice(0, data.indexOf('</plist>')+8);
data = $.NSString.stringWithString(data).dataUsingEncoding($.NSISOLatin1StringEncoding);
var mobileProvision = $.NSPropertyListSerialization.propertyListWithDataOptionsFormatError(data, $.NSPropertyListImmutable, null, null);
if (mobileProvision.valueForKey('ProvisionedDevices')) {
res.debug = 'adhoc';
} else {
res.debug = false;
}