#!/bin/bash

#Script to back up /home/tracey to external USB drive
#http://www.bobulous.org.uk/misc/rsync-backup.html
date=`date +%Y-%m-%d`
log_file='/home/tracey/backuplogs/usb-rsync-backup-'${date}'.txt'

echo "#####"
echo ""

# Check what OS we're on
# OS=`awk -F = '/NAME/{print $2}' /etc/os-release`
# echo "OS we're running on is $OS"
source ~/git/shell-scripts/check_os.sh

# Get the mount point by uuid
UUID=ff0b3c83-853d-452f-abb6-48069e337446
mount_point=`findmnt -rn -S UUID=$UUID -o TARGET`

echo "Mount point is $mount_point"

# Check whether target volume is mounted, and mount it if not.
if ! mountpoint -q ${mount_point}/; then
	echo "Mounting the external USB drive."
	echo "Mountpoint is ${mount_point}"
	if ! mount ${mount_point}; then
		echo "An error code was returned by mount command!"
		exit 5
	else echo "Mounted successfully.";
	fi
else echo "${mount_point} is already mounted.";
fi
# Target volume **must** be mounted by this point. If not, die screaming.
if ! mountpoint -q ${mount_point}/; then
	echo "Mounting failed! Cannot run backup without mounted backup volume!"
	exit 1
fi

echo "Preparing to rsync differences in home directory to backup USB drive."

rsync -azh --exclude '.cache' --exclude 'Videos' --exclude 'Nextcloud' --exclude 'Downloads/isos' --exclude 'VirtualBox VMs' --exclude 'Sync' --exclude '.local/share/Steam' --exclude 'Music' --exclude '.Trash-*' --exclude 'home_backup' --progress /home/tracey/ $mount_point/tracey_home --delete 2>&1 | tee $log_file

echo ""
echo "Backup Complete"
echo "Log of this backup is in $log_file"
echo "Now deleting backup logs over 7 days"
echo "####"

find /home/tracey/backuplogs -iname 'usb-rsync-backup-*' -mtime +7 -type f -delete