parse RSS file to tweet new entries

parserss.sh

#!/bin/bash
# parse RSS file to tweet new entries
# author : http://www.cybermonde.org
# needed : feedstail (https://github.com/Psycojoker/feedstail) and ttytter (http://www.floodgap.com/software/ttytter/)
# usage (summary = description) :
# feedstail -u "http://www.domain.name/rss.php" -f "{summary}|{link}" -k summary | /home/sweethome/parserss.sh | /home/sweethome/ttytter.pl -script

# new separator
IFS="|"

# reading summary and link
while read summary link
	do
		# link (URL) length = ${#link}
		# summary (description) length = ${#summary}
		# if < 140 signs, display all
		if [ $((${#link}+${#summary})) -lt 140 ]
			then echo "$summary $link"	
		# else cut summary and add (...) before link
			else
			echo "${summary:0:140-${#link}-6}(...) $link"
		fi
	done