#!/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 ""


# shellcheck source-path=SCRIPTDIR
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`

# For dedicated Linux Backup drive
LABEL="LinuxLapBack"
BLOCKID="/dev/disk/by-label/$LABEL"

# Check whether target volume is mounted, and mount it if not.
# Use findmnt because of greater flexibility
# Avoid hard coded mount point

# if ! mountpoint -q ${mount_point}/; then
FINDMNT_OUTPUT=$(findmnt -S LABEL=$LABEL)
if [ "$FINDMNT_OUTPUT" = "" ]; then
	echo "Mounting the external USB drive."
	# echo "Mountpoint is ${mount_point}"
	# if ! mount ${mount_point}; then

   if udisksctl mount -b "$BLOCKID"; then
      echo "Mounted successfully at $mount_point"
	else
      echo "An error code was returned by mount command!"
      echo "$?"
      exit 1
	fi
else
   echo "Drive is already mounted."
fi
# Target volume **must** be mounted by this point. If not, die screaming.
# If mounted set the mount point
FINDMNT_OUTPUT1=$(findmnt -S LABEL=$LABEL)
echo "NEW findmnt output is:"
echo "$FINDMNT_OUTPUT1"
if [ "$FINDMNT_OUTPUT1" = "" ]; then
	echo "Mounting failed! Cannot run backup without a mounted backup volume!"
	exit 1
else
   mount_point=$(echo "$FINDMNT_OUTPUT1" |awk '{getline; getline; print $1;}';)
fi
# echo "mount point before perm check is"
# echo "$mount_point"


if [ "$mount_point" = "" ]; then
	echo "ERROR: Mount point is not defined!"
	exit 1
else
   # This only has to be done once per new ext* partition IF mount is not automounted. Perms should stick after that every time its mounted
   # if [ -w $mount_point ]
   if [ -w "$mount_point" ]
   then
        echo "User has write permission for backup directory, proceeding with rsync"
   else
        echo "Changing ownership for backup directory - only has to be done once for the drive"
        sudo chown tracey.users "$mount_point"
   fi
fi

# Check whether target directory exists. If not need to use sudo to make it

if [ ! -d "$mount_point/tracey_home" ]; then
  echo "Creating backup directory"
fi

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

rsync -azh --exclude '.cache' --exclude 'Videos' --exclude 'Nextcloud' --exclude 'Downloads' --exclude 'VirtualBox VMs' --exclude 'Sync' --exclude '.local/share/Steam' --exclude 'Music' --exclude '.Trash-*' --exclude 'home_backup' --exclude 'SatisfactoryShareSaves' --exclude 'Desktop/S9_backup' --exclude 'mount' --exclude 'isos' --exclude 'Sync' --exclude '.local/share/gvfs-metadata' --exclude 'clearbuilt' --progress /home/tracey "$mount_point" --delete 2>&1 | tee "$log_file"

sudo rsync -azh --progress /var/lib/libvirt/images "$mount_point"/var --delete 2>&1 | tee "$log_file"

sudo rsync -azh  --progress /var/lib/libvirt/qemu "$mount_point"/var --delete 2>&1 | tee "$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