Remove all the old crufty system gems

remove_system_gems.sh

#Uninstall crappy old system gems
function remove_system_gems {
  echo "Uninstalling all system gems... This could take a while..."
  for x in `gem list --no-versions`; do gem uninstall $x --all --quiet --ignore-dependencies --user-install --executables; done
  #TODO : Add check for trailing slash and remove
  system_location=$@
  if [ "$system_location" == "" ]; then
    system_location='/Library/Ruby/Gems/1.8'
  fi
  folder_names=( 'specifications' 'gems' 'cache' 'doc' 'bundler/gems' )
  for folder_name in ${folder_names[@]}; do
    echo "Deleting from $system_location : $folder_name"
    `sudo rm -rf $system_location/$folder_name`
  done

  result=`gem list`
  echo '================================================='
  if [ "$result" == "" ]; then

    echo ' Uninstall of existing system gems successful'
  else
    echo ' Error - There appears to still be gems in "gem list" please check the system location and try again'
  fi
  echo '================================================='

}