taoup-fortune

#!/bin/bash
# Note: The `while read line...done` stuff is an ugly hack for portable random `sort`, mostly for OSX users.
#       If you don't yet have `cowsay`, stop reading right now and get it installed!
#       Alternatively, try:
#        - https://github.com/matheuss/parrotsay
#        - https://github.com/busyloop/lolcat
#        - https://github.com/sckott/cowsay (enhanced version)
dir=`dirname "${BASH_SOURCE[0]}"`

# USER ALERT!!! @ronjouch complained about execution speed at https://github.com/globalcitizen/taoup/issues/11 
#  ... therefore we add caching ... therefore first ensure we have an up to date cache via one of ...
# md5sum
if [ `which md5sum 2>/dev/null` ]; then
 MD5SUM=`md5sum ${dir}/taoup | cut -d ' ' -f1`
# md5
elif [ `which md5 2>/dev/null` ]; then
 MD5SUM=`md5 -q ${dir}/taoup | cut -d ' ' -f1`
# openssl
elif [ `which openssl 2>/dev/null` ]; then
 MD5SUM=`cat ${dir}/taoup | openssl md5 | grep -o '[[:xdigit:]][[:xdigit:]]*$' |cut -d '=' -f2- |cut -c 2-`
# ruby
elif [ `which ruby 2>/dev/null` ]; then
 MD5SUM=`ruby -rdigest/md5 -e"puts Digest::MD5.file'${dir}/taoup'"`
fi

# determine cachefile name
cachefile=${dir}/.taoup-fortune.cache.${MD5SUM}

# create if necessary
if [ ! -r $cachefile ]; then
 ${dir}/taoup $@ >${cachefile}
fi

# handle all classes of society
if [ `which cowsay 2>/dev/null` ]; then
	# educated user execution path
	if [ `which shuf 2>/dev/null` ]; then
	  cat ${cachefile} |grep -v '^---' | shuf -n 1 | cowsay -f eyes -n |head -n 2 |tail -n 1
	elif [ `echo test|sort -R 2>/dev/null` ]; then
	  cat ${cachefile} |grep -v '^---' | sort -R | head -n 1 | cowsay -f eyes -n |head -n 2 |tail -n 1
        else
	  cat ${cachefile} |grep -v '^---' | while read line;do echo $RANDOM'|'$line;done |sort|cut -d'|' -f2- |head -n 2 |tail -n 1
        fi
	echo '' | cowsay -f eyes |tail -n 10 |sed 's/^//'
else
	# impoverished user execution path
	if [ `which shuf 2>/dev/null` ]; then
	  cat ${cachefile} |grep -v '^---' | shuf -n 1
	elif [ `echo test |sort -R 2>/dev/null` ]; then
	  cat ${cachefile} |grep -v '^---' | sort -R | head -n 1
	else
	  cat ${cachefile} |grep -v '^---' | while read line;do echo $RANDOM'|'$line;done |sort|cut -d'|' -f2- |head -n 2 |tail -n 1
	fi
fi
echo "(B"