shell/apple script to sich iTunes library easily

switchITunes.scpt

tell application "System Events"
  set runs to count (every process whose name is "iTunes")
end tell

set lib to do shell script "ls -l ~/Music | grep -i '\\->.*Music/iTunes' | sed 's/^.*iTunes-//g'"

set question to display dialog "iTunes is using '" & lib & "'. Switch to:" buttons {"external", "internal", "swing"} default button lib with icon 2 with title "Choose witch Library to use"
set new_lib to button returned of question

if new_lib is equal to lib then
  return
end if

if runs is equal to 1 then
  tell application "iTunes"
    quit
    delay 5
  end tell
end if

do shell script "rm ~/Music/iTunes"
do shell script "ln -s ~/Music/iTunes-" & new_lib & " ~/Music/iTunes"

tell application "iTunes"
  activate
end

switchITunes.sh

#!/bin/sh
TEST=$(ps -x |grep "/iTunes " |grep -v grep |wc -l)
if [[ $TEST -ne 0 ]] 
  then 
   echo "iTunes is running. Please quit iTunes first"
   exit
 fi
LIB="`ls -l ~/Music | grep -i '\->.*Music/iTunes' | sed 's/^.*iTunes-//g'`"
if [ "$LIB" == "internal" ]
  then
	rm ~/Music/iTunes
	ln -s ~/Music/iTunes-external ~/Music/iTunes
	echo "External lib is being used"
  else
	rm ~/Music/iTunes
	ln -s ~/Music/iTunes-internal ~/Music/iTunes
	echo "Internal lib is being used"
fi