Quick and dirty script to remove .PKG installs on OSX

uninstall-pkg.sh

#!/bin/bash

SPECIALEXTLIST=(app action caction definition bundle kext prefPane plugin jdk fs framework)

function joinList { local IFS="$1"; shift; echo "$*"; }

function getListWithTerminators {
	PROCLIST=()

	for EXT in "${SPECIALEXTLIST[@]}"; do
		PROCLIST[${#PROCLIST[@]}]="\.$EXT$"
		if [ "$1" = "true" ]; then
			PROCLIST[${#PROCLIST[@]}]="\.$EXT/"
		fi
	done

	joinList "|" ${PROCLIST[@]}
}

function containsElement {
	local e
	for e in "${@:2}"; do [[ "$e" == "$1" ]] && echo 1 && return 0; done
	echo 0
}

SPECIALEXTLISTEXPR_SIMPLE=$(getListWithTerminators)
SPECIALEXTLISTEXPR=$(getListWithTerminators true)

if [ "$USER" != "root" ]; then
	echo "You should be root to run this script."
	exit 1;
fi

if [ "$1" = "" ]; then
	echo "Usage: $0 [-r] package-name"
	echo "       You can find the package name by executing pkgutil --pkgs"
	echo "       Without -r the files/directories that would be removed are only displayed."
	exit 1;
fi

UNINST="0"

if [ "$2" != "" ]; then
	PKGNAME=$2
	if [ "$1" = "-r" ]; then
		UNINST="1"
	fi
else
	PKGNAME=$1
fi

HASPKG=`pkgutil --pkgs | grep -c "$PKGNAME"`

if [ $HASPKG -eq 0 ]; then
	echo "Specified package name does not seem to exist."
	exit 1;
fi

if [ $HASPKG -gt 1 ]; then
	echo "The specified package name seems to match more than one more installed package!"
	exit 1;
fi

LOC=`pkgutil --pkg-info "$PKGNAME" | grep -i "Location" | sed 's/^location:[^a-zA-Z0-9]*//g'`

if [ "$LOC" = "(null)" ]; then
	LOC=""
fi

LOC="/$LOC"

echo " * Package root: $LOC"

DEEPDIR=`basename "$LOC"`
DIREXT=`echo $DEEPDIR | sed 's/^.*\.//g'`
DIRISSPECIAL=0

if [ "$DIREXT" != "" ]; then
	DIRISSPECIAL=$(containsElement "$DIREXT" "${SPECIALEXTLIST[@]}")

	if [ $DIRISSPECIAL -eq 1 ]; then
		echo -n " * Package location is special file"
		if [ "$UNINST" = "0" ]; then
			echo ", so that would be removed."
		else
			echo ". Removing that..."
			rm -vr "$LOC"
			pkgutil --force --forget "$PKGNAME"
		fi
	fi
fi

if [ $DIRISSPECIAL -eq 0 ]; then
	APPFILES=`pkgutil --only-dirs --files "$PKGNAME" | egrep -i "$SPECIALEXTLISTEXPR_SIMPLE" | tail -r`

	if [ "$UNINST" = "0" ]; then
		echo " * Files to be removed ..."
		pkgutil --only-files --files "$PKGNAME" | egrep -vi "$SPECIALEXTLISTEXPR"

		if [ "$APPFILES" != "" ]; then
			echo
			echo " * App Files to be removed ..."
			OIFS=$IFS
			IFS=$'\n'
			for ARQ in $APPFILES; do echo $ARQ; done

			echo
			echo " * Directories to be removed ..."
			for PD in `pkgutil --only-dirs --files "$PKGNAME" | egrep -vi "$SPECIALEXTLISTEXPR" | tail -r`; do
				echo $PD
			done
			IFS=$OIFS
		else
			echo
			echo " * Directories to be removed ..."
			pkgutil --only-dirs --files "$PKGNAME" | tail -r
		fi
	else
		cd $LOC

		echo " * Removing files ..."
		pkgutil --only-files --files "$PKGNAME" | egrep -vi "$SPECIALEXTLISTEXPR" | tr "\n" "\0" | xargs -n 1 -0 rm -v

		if [ "$APPFILES" != "" ]; then
			echo
			echo " * Removing App Files ..."
			OIFS=$IFS
			IFS=$'\n'
			for ARQ in $APPFILES; do rm -vr $ARQ; done

			echo
			echo " * Directories to be removed ..."
			for PD in `pkgutil --only-dirs --files "$PKGNAME" | egrep -vi "$SPECIALEXTLISTEXPR" | tail -r`; do
				rm -f $PD/.DS_Store
				rmdir $PD
			done
			IFS=$OIFS
		else
			echo
			echo " * Directories to be removed ..."
			pkgutil --only-dirs --files "$PKGNAME" | tail -r | tr "\n" "\0" | xargs -n 1 -0 sudo rmdir
		fi

		echo
		echo " * Forgetting $PKGNAME ..."
		pkgutil --force --forget "$PKGNAME"
	fi
fi