Turning a command line app into a Cocoa GUI app on Mac OS X?

Question

Is there any tutorials or references, if such thing is possible, to make GUI applications out of command line apps?
What I mean is, having a command line app, wrap it in

Answer 1

For very simple scripts, I recommend Platypus. For more complicated scenarios, you could try something like Pashua.

Answer 2

As a matter of fact there are. Here is the first hit for a Google search:

• Cocoa Dev Central: Wrapping UNIX Commands

What you're looking for is the NSTask class. Check out the documentation for all the information you need.