title: Running Shell-scripts phase of build takes forever
body: <p>I am spending almost 30 seconds in running "2 of 3 shell-scripts" every time I build my project in Xcode.  I have a decent sized podfile with 20+ pods but beyond that, I'm not sure what causes this build phase to take so long, nor if I can avoid it.</p>
  
  <p>Here is a picture of my build-phases.</p>
  
  <p><a href="https://i.stack.imgur.com/HNDng.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HNDng.png" alt=""></a></p>
  
  <p>Surely, it can cache whatever operations the shell-scripts are performing.  If I simply change one print statement to print "this" to "that", I shouldn't need to spend 30 seconds waiting for the scripts to run.</p>