Keep track of Twitter "unfollowers"

gistfile1.sh

#!/bin/sh

# track unfollows on twitter using "t" https://github.com/sferik/t
# usage:
#
# to check if any of your followers has stopped following you since the last
# time the script wall called, use:
# $ this_script followers
# 
# to check if YOU stopped following someone (it appears many of us witnessed
# this behaviour in twitter), use:
# $ this_script followings
#
# replace the following email address with your own

rcpt="[email protected]"

if [ $# -lt 1 ]; then
	echo "$0 <followers|followings>"
	exit 1
fi

PATH=${PATH}:/usr/local/bin

tfollow="/tmp/t${1}.lst"
flist=`t ${1}|sort`
rec_follows() {
	echo "${flist}" >${tfollow}
	exit 0
}

[ ! -f "${tfollow}" ] && rec_follows

fdiff="`echo \"${flist}\"|diff -u ${tfollow} -`"

if [ ! -z "${fdiff}" ]; then
	echo "${fdiff}"|grep ^-[^\ -] |
		mail -s "Unfollowed ${1} on Twitter!" "${rcpt}"
	rec_follows
fi