MacTeX uninstaller script based on pkgutil command

uninstall_mactex.sh

#!/bin/bash
# MacTeX uninstaller script based on pkgutil command
# by Akihiro Uchida, CC0 dedicated to the public domain
# see http://creativecommons.org/publicdomain/zero/1.0/
IFS=$(echo -en "\n")
for pkg in $(pkgutil --pkgs|grep org.tug.mactex); do
    volume="$(pkgutil --pkg-info "$pkg"|grep volume|cut -d' ' -f2-)"
    location="$(pkgutil --pkg-info "$pkg"|grep location|cut -d' ' -f2-)"
    echo "remove all of the files installed under the $pkg"
    for file in $(pkgutil --files "$pkg"); do
        rm -rf "${volume}${location}/${file}"
    done
    pkgutil --forget "$pkg"
done
echo "remove TeX Distribution pane on the System Preferences.app"
rm -rf /Library/PreferencePanes/TeXDistPrefPane.prefPane
echo "remove items in /Library/TeX"
rm -rf /Library/TeX/.scripts /Library/TeX/Distributions
rm -f /Library/TeX/Documentation /Library/TeX/Local /Library/TeX/Root