Script to capture info on currently playing song in MPD, add an (optional) prefix and/or suffix and tweet it all via TTYtter

mpd-ttytter_now_playing.sh

#!/bin/sh

# Script to capture info on currently playing song in MPD, add an 
# (optional) prefix and/or suffix and tweet it all via TTYtter (which 
# must be of course already been configured)
#
# Dependencies: TTYtter, a MPD client that can output song info (I use 
# ncmpcpp)

PREFIX='on air: ' # what should go before the now playing string
SUFFIX=' #NP' # what should go after the now playing string
# save the now playing string from the mpd client of choice (it and 
# format can be of course changed according to one's tastes
NP=$(ncmpcpp --current-song "%a - %t")

if [ -z $NP ]; then
    echo "Can't get the current song, is MPD playing?"
    echo "Or perhaps the MPD client isn't working/displaying song info correctly?"
    exit 1
else
    continue
fi

STATUS="${PREFIX}${NP}${SUFFIX}"
echo $STATUS
ttytter -rc=-donearm -script -status="$STATUS"
exit 0

Pretty convenient thanks!

due to ncmpcpp upstream changes, edit line
NP=$(ncmpcpp --now-playing "%a - %t")
to
NP=$(mpc current)

The option's been renamed to --current-song

Update the gist, thanks @masala-man!