if(!c){
  if(a || b){
    Give user the choices:
    if(a){                    * copy sources from /usr/share [recommended]}
    if(b){                    * checkout sources from svn [advanced users]}
                              * do not copy sources [very advanced users, not recommended :-) ]
  }else{
    ONCELOCK(Warn user that if he wants to use theide with ultimate++,
             he must either install upp package or subversion)
  }
}else{
  if((users sources are from /usr/share) && (user source are outdated)){
    Ask user if he wishes to: * overwrite everything
                              * overwrite only files that haven't changed since last update
                              * keep all the out of date sources
  }
  if((users sources are from svn) && (svnversion reports newer version)){
       Alert user that update is available.
  }
}