#!/bin/bash
# vim:ft=sh
# New line separated list of all directories to backup
read -d '' DIRS <<-"_EOF_"
/etc
/home
/home_hdd
_EOF_
# Directory where backup will be stored
BACKUP=backup
# Directory where backup will be mounted
MBACKUP=/media/backup-hdd
# UUID of disk
UUID=21e0c8dd-77cc-44f1-b2bd-bb238d142e7f
####################################################################
# Check if running as root
if [ `id -u` -ne "0" ]; then
	echo Please run this as root.
	exit 1
fi
# Mount backup disk if available
PART=$(lsblk -fpl | grep "$UUID" | awk '{print $1}')
if [ -z "$PART" ]; then
	echo Disk not detected. Exiting
	exit -1
fi
MPATH=$(lsblk -lp | grep "$PART" | awk '{print$7}')
# TODO check if this is not in backupped path
if [ -n "$MPATH" ]; then
	echo Disk already mounted to $MPATH. Continuing with that.
else
	MPATH=$MBACKUP
	mkdir -p "$MPATH"
	mount "$PART" "$MPATH"
fi

mkdir -p "$MPATH/$BACKUP"
while read -r DIR; do
	echo Backing up: $DIR
	rdiff-backup -b --exclude-device-files --exclude-fifos --exclude-sockets \
		--terminal-verbosity=5 --print-statistics \
		"$DIR" "$MPATH/$BACKUP/$(basename $DIR)/"
	rdiff-backup --remove-older-than 100D --force \
		--terminal-verbosity=5 --print-statistics \
		"$MPATH/$BACKUP/$(basename $DIR)/"
done <<< "$DIRS"

# If we were mounting it, we should unmount it
if [ "$MBACKUP" = "$MPATH" ]; then
	umount "$MPATH"
fi

date +"%Y%m%d" > /home/cynerd/.backup_date
pkill -RTMIN+13 i3blocks

sync

echo
echo Backup finished