iTunesRefresh will scan your "~/Music/iTunes/iTunes Music" folder and inform iTunes about new and deleted files. This is specifically useful after synchronizing music with another computer.
iTunesRefresh is a Python command line script and requires the appscript module. Install the module with the following command:
easy_install appscript
Then just start the script:
# ./iTunesRefresh.py Searching for music in /Users/yaron/Music/iTunes/iTunes Music 1385 files found Connecting to iTunes Playlist "Library" contains 1432 files of 14420 MB. This is 5:16:34:14 of music. Checking iTunes track list [****************************************] (100.0 %) 0 tracks to remove 10 new files to add 1/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/01 One Step Inside Doesn't Mean You Understand.mp3 2/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/02 Pilot.mp3 3/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/03 Pick Up the Phone.mp3 4/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/04 Trashing Days.mp3 5/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/05 This Room.mp3 6/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/06 Solitaire.mp3 7/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/07 One With the Freaks.mp3 8/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/08 Neon Golden.mp3 9/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/09 Off the Rails.mp3 10/10 Add /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/10 Consequence.mp3 Press Enter to continue or Ctrl-C to quit. Removing 0 tracks Adding 10 new files Creating playlist 'Import 2013/05/04 18:43' 1/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/01 One Step Inside Doesn't Mean You Understand.mp3 2/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/02 Pilot.mp3 3/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/03 Pick Up the Phone.mp3 4/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/04 Trashing Days.mp3 5/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/05 This Room.mp3 6/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/06 Solitaire.mp3 7/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/07 One With the Freaks.mp3 8/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/08 Neon Golden.mp3 9/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/09 Off the Rails.mp3 10/10 Adding /Users/yaron/Music/iTunes/iTunes Music/The Notwist/Neon Golden/10 Consequence.mp3