bash script to track unfollowers on Twitter (requires https://github.com/sferik/t)

track.sh

#!/bin/bash

#
# track unfollowers on twitter
#

cd $HOME/twitter

if [ ! -f $HOME/twitter/prev_followers.txt ]; then
  t followers > prev_followers.txt
fi

t followers > followers.txt

unfollowers="$(comm -13 followers.txt prev_followers.txt | tr '\n' ' ')"
myaccount=$1

if [[ ! -z "$unfollowers" ]]; then
    echo "`date "+%Y-%m-%d %H:%M %Z"` ${unfollowers}unfollowed you"
    t dm ${myaccount} "${unfollowers}unfollowed you" > /dev/null
fi

mv followers.txt prev_followers.txt