title: Run script during Clean / Clean All in Xcode
body: <p>I have a fairly complex (iPhone SDK) Xcode project, with many targets -- 4 static libs, unit tests, multiple sample apps, a BuildAll that runs a shell script, and a Package that runs another shell script. The "BuildAll" target creates a directory in the project with some subdirectories with contents ready for distribution.</p>
  
  <p>When I click "Clean All," though, Xcode doesn't know to clean my Distribution directory. I'd like it to. I can't seem to find a way to do this -- does anybody know how?</p>
  
  <p><br/></p>
  
  <p>It feels like Clean and Clean All should really just be targets in Xcode, and I should be able to add a "Run Script" phase. Not so, to my knowledge.</p>
  
  <p>BTW, the "BuildAll" target does handle cleaning the Distribution directory, so this is not the end of the world to me. It's just irksome that "Clean All" doesn't actually clean all in my particular case.</p>