Hyperbackup_VPN.sh

#!/bin/bash

# This script opens a Wireguard VPN and is closing it after a Hyperbackup task has finished.
# It was tested with only one active backup task on a single remote target and Hyperbackup 4.1.1-3758.
#
# How it works:
#   * Setup a new scheduled task in the control panel executing this script with correct parameters
#   * Make sure it runs BEFORE your Hyperbackup tasks are started
#   * Note: Verify if it's working. Unfortunately Hyperbackup officially doesn't support any hooks,
#           therefore this is relying on parsing the log file with regex. It can break any time with a
#           future update of Hyperbackup.

LOG_FILE=/var/packages/HyperBackup/var/log/hyperbackup.log

print_help () {
  echo "Usage: $0 [wg_config] (-backup | -integrity)"
}

if [ -z "$1" ]; then
  print_help
  exit 1
fi

case $2 in
  -backup)
  task='backup'
  regex='\[BackupTaskFinished\]'
  ;;

  -integrity)
  task='integrity check'
  regex='from state \[.+\] to state \[Backupable\] with action \[Finish\]'
  ;;

  *)
  print_help
  exit 1
  ;;
esac

echo Connecting VPN...
wg-quick up $1

echo "Waiting for $task to finish..."
start_ts=$(date +%s)

while :
do
  # Reverse cat and return the first grep match
  line=$(tac $LOG_FILE | grep -E "$regex" | head -1)

  # Check if string is not empty
  if [ -n "$line" ]; then
    array=($line)
    ts=$(date -d ${array[0]} +%s)

    # Check if found timestamp is greater than timestamp of starting this script
    if [ $ts -gt $start_ts ]; then
      echo "${task^} finished. Disconnect VPN..."
      wg-quick down $1
      break
    fi
  fi

  sleep 60
done