#!/bin/sh

PREFIX=

. "$PREFIX/lib/libalpine.sh"

usage() {
        cat <<__EOF__
usage: setup-apklbu [-hi] [-m relative mountpoint]

Setup apk caching and lbu settings.

options:
 -h  Show this help
 -i  Run in installer mode (usually only when called by setup-alpine)
 -m  Specify mountpoint under /media for lbu backups
__EOF__
        exit 1
}


while getopts "im:h" opt; do
        case $opt in
                i) VERBOSE="1";;
		h) usage;;
		m) MOUNTPOINT="$OPTARG";;
        esac
done

if [ "$VERBOSE" = "1" ]; then
	echo "Setup apk caching and lbu? (y/N)"
	default_read setupapklbu
	if [ "$setupapklbu" = "N" ] || [ "$setupapklbu" = "n" ]; then 
		exit 0
	fi
fi

if [ -z $MOUNTPOINT ]; then
	MOUNTPOINT="usb"
	echo "Please enter mountpoint directory under /media for lbu [$MOUNTPOINT]:"
	default_read MOUNTPOINT "$MOUNTPOINT"
fi

mountstatus="`mount | grep /media/${MOUNTPOINT}`"

if [ -z $mountstatus ]; then
	echo "$MOUNTPOINT is not mounted" && exit 1
fi

readwritestatus="`echo $mountstatus | awk -F '(' '{print $2}' | awk -F ',' '{print $1}'`"

if [ "$readwritestatus" = "ro" ]; then
	rewrite=1
fi

if [ "$rewrite" = 1 ]; then
	mount -o remount,rw /media/${MOUNTPOINT} || die "Failed to remount media rw"
fi

mkdir -p /media/${MOUNTPOINT}/cache || die "Failed to create /media/${MOUNTPOINT}/cache"
ln -s /media/${MOUNTPOINT}/cache /etc/apk/cache || die "Failed to create apk cache softlink"
apk cache sync
cat > /etc/lbu/lbu.conf <<EOF
# what cipher to use with -e option
DEFAULT_CIPHER=aes-256-cbc

# Uncomment the row below to encrypt config by default
# ENCRYPTION=$DEFAULT_CIPHER

# Uncomment below to avoid <media> option to 'lbu commit'
# Can also be set to 'floppy'
LBU_MEDIA=$MOUNTPOINT

# Uncomment below to let lbu make up to 3 backups
# BACKUP_LIMIT=3
EOF
lbu package /media/"$MOUNTPOINT" || die "Failed to lbu apkovl on /media/${MOUNTPOINT}"
sync
if [ "$rewrite" = 1 ]; then
	mount -o remount,ro /media/${MOUNTPOINT} || die "Failed to remount media ro"
fi