itunes.sh - control your iTunes from shell

itunes.sh

#/bin/bash
#
# itunes.sh - Control Your iTunes from shell
#

TRACK_PROGRAM=`cat <<EOS
tell current track
    name & " - " & artist
end tell
EOS`

case "$1" in
-h|help)
    cat <<USAGE
usage: itunes.sh [OPTIONS]

OPTIONS:

    play/pause|stop     Toggle the playing/paused state
    next                Advance to the next track in the current playlist
    prev                Return to the previous track in the current playlist
    track               Show information of the current track
    shuffle (on|off)    Play the songs in this playlist in random order?
    +n/-n               Increase/Decrease the current volume
    volume              The sound output volume (0 = minimum, 100 = maximum)

        volume          Show the current volume
        volume 15       Set the current volume to 15
        volume +10      Increase the current volume
        volume -10      Decrease the current volume

    -h|help             Show this help
USAGE

    exit 0 ;;

play|pause|stop)
    PROGRAM="playpause" ;;
next)
    PROGRAM=`cat <<EOS
next track
$TRACK_PROGRAM
EOS`
    ;;
prev)
    PROGRAM=`cat <<EOS
previous track
$TRACK_PROGRAM
EOS`
    ;;
track)
    PROGRAM="$TRACK_PROGRAM"
    ;;
shuffle)
    shift
    case "$1" in
    yes|on)
        PROGRAM="set shuffle of current playlist to true" ;;
    no|off)
        PROGRAM="set shuffle of current playlist to false" ;;
    *)
        PROGRAM="get shuffle of current playlist"
    esac
    ;;
+*|-*)
    PROGRAM="set sound volume to sound volume $1 $2" ;;
volume)
    shift
    case "$1" in
    +*|-*)
        PROGRAM="set sound volume to sound volume $1 $2" ;;
    *)
        if [ -z "$1" ]; then
            PROGRAM="get sound volume"
        else
            PROGRAM="set sound volume to $1"
        fi
    esac
    ;;
esac

PROGRAM=`cat <<EOS
tell application "iTunes"
    $PROGRAM
end tell
EOS`

exec osascript -e "$PROGRAM"