#!/bin/sh
#
# <zaurus@bredband.net>
# Modified by Aman Gupta <oz@themastermind1.net>
# Modified by Matthias Hentges to adjust to changes in OZ <oe@hentges.net>

usage () {
	echo "Usage: "
	echo "    $0 add    packagename (links \"packagename\" to root filesystem)"
	echo "    $0 remove packagename (unlinks \"packagename\" from root filesystem)"
	echo "    $0 list   mountpoint  (lists packages on \"mountpoint\", e.g. '/mnt/card')"
	echo "    $0 mount  mountpoint  (links all packages on \"mountpoint\", e.g. '/mnt/card')"
	echo "    $0 umount mountpoint  (unlinks all packages on \"mountpoint\", e.g. '/mnt/card')"
	exit
}

findpackage () {
	echo "*** Locating package"
		
	if test -e /etc/ipkg.conf
	then
		valid_mount_points=`cat /etc/ipkg.conf| grep ^dest| awk '{print $3}'|sed "s/\/$//"`
	else
		valid_mount_points="/mnt/card /mnt/cf /mnt/ram /media/card /media/cf /media/ram"
	fi
	
	for mount_point in $valid_mount_points
	do
		if [ -e "$mount_point/usr/lib/ipkg/info/$PACKAGE.list" ]; then
			PREFIX="$mount_point"
			files=`cat "$PREFIX/usr/lib/ipkg/info/$PACKAGE.list" |sed -e "s#$mount_point##g"`
		fi
	done
	
	
	if test -z "$files"
	then
		echo "Package \"$PACKAGE\" not found."
		exit
	else	
		echo "*** Found package on $PREFIX"
	fi
}

add () {
	echo "*** Adding $PACKAGE"
	echo "$files" |
	while read line; do
		test -L "$line" && rm "$line"
		if [ ! -e "$line" ]; then
			# Only if it doesn't already exist.
			if [ -d "$PREFIX$line" ]; then
				# It's a directory.
				`mkdir "$line"`
			else
				# It's a file.
				[ ! -d `dirname $line` ] && mkdir -p `dirname $line`
				`ln -s "$PREFIX$line" "$line"`
			fi
		fi
	done
}

remove () {
	echo "*** Removing $PACKAGE"

	echo "$files" |
	while read line; do
		if [ -e "$line" ]; then
			# File/Directory exists.
			if [ -d "$line" ]; then
				# Directory.
				contents=$(ls -1 "$line")
				if [ ! "$contents" ]; then
					# Empty directory
					rmdir "$line"
				fi
			elif [ -L "$line" ]; then
				rm "$line"
			fi
		fi
	done
}

list () {
	filelist=""
	files=`ls -1 $LOCATION/usr/lib/ipkg/info/*.list`
	for filename in $files; do
		filename=${filename##*/}
		filename=${filename%%.list}
		filelist="$filelist $filename"
	done
}

COMMAND=$1
PACKAGE=$2
LOCATION=$2

if [ $# -ne 2 ]
then
	usage
fi

echo "*** Command: $COMMAND"
case "$COMMAND" in
	"add" )
		findpackage
		add
		;;
	"remove" )
		findpackage
		remove
		;;
	"list" )
		list
		for file in $filelist; do
			echo $file
		done
		;;
	"mount" )
		list
		for file in $filelist; do
			$0 add $file
		done
		;;
	"umount" )
		list
		for file in $filelist; do
			$0 remove $file
		done
esac

echo "*** Done."
echo ""
exit