Do you ever build an app with multiple targets and you ever forget to add a resource to all of them? This is a big problem for me, because I'm working in a huge developer group and I don't want that my files are missing in another developer project. So... This script will add reference to the missing file in a target. Only one thing, you have to specify a "complete" target to start the comparison.
To run the script you have to install Xcodeproj and colorize gems
sudo gem install xcodeproj
sudo gem install colorize
Then open the rb file and set the blacklist array, if you want.
Now launch the ruby script and follow the steps