Update Jackett on Ubuntu nicely as it appears to bomb when auto-updating

update_jackett.sh

#!/bin/bash
THISUSER=$(whoami)
    if [ $THISUSER != 'root' ]
        then
            echo 'You must use sudo to run this script, sorry!'
            exit  1
    fi

echo "Jackett:"
echo "Grabbing current running state.."
wasactive=$(systemctl is-active jackett)
echo "  $wasactive"

if [[ "$1" == "-f" ]] || [[ "$1" == "--force" ]]; then
        echo "Forcing update"
        forced=true
else
        forced=false
fi

echo "Checking currently installed version"
currentver=$(mono /opt/jackett/JackettConsole.exe --version | head -1 | awk -F "[ .]" '{print $2 "." $3 "." $4}')
if [ ! $currentver ]; then
        echo "  Could not get currentver - assuming v0.0.1"
        currentver='v0.0.1'
fi

echo $currentver | grep -i error
if [ $? == 0 ]; then # the currentvrsion isn't empty but threw an error
        echo "  currentver is an error string - assuming v0.0.1"
        currentver='v0.0.1'
else
        echo "  currentver = $currentver"
fi

echo "Getting download URL from github.."
link=$(wget -q https://github.com/Jackett/Jackett/releases/latest -O - | grep -i href | grep -i mono.tar.gz | awk -F "[\"]" '{print $2}')
echo "  $link"
echo "Plucking latest version out of github URL.."
latestver=$(echo $link | awk -F "[\/]" '{print $6}')
if [ ! $latestver ]; then
        echo "  Could not get latestver - assuming same as currentver to avoid breaking stuff"
        latestver=$currentver
else
        echo "  latestver = $latestver"
fi

link='https://github.com'$link
if [[ $currentver != $latestver ]] || [[ $forced == true ]]
    then
        echo "Jackett needs updating"
        echo "  Download link = $link"
        cd /tmp/
        rm Jackett.Binaries.Mono.tar.gz* 2> /dev/null
        dl=false
        wget -q --show-progress --progress=bar:force:noscroll $link && dl=true
        if [ $dl == false ]; then
          echo '  Download failed!'
        else
          echo "  Download succeeded"
          echo "Updating Jackett"
          echo "  stopping Jackett service"
          service jackett stop
          echo "  unpacking tar"
          tar -xf Jackett*
          echo "  removing existing binaries"
          rm -r /opt/jackett/*
          echo "  copying into /opt"
          sudo cp -r -u Jackett*/* /opt/jackett/
          echo "  fixing permissions"
          chown -R openflixr:openflixr /opt/jackett/
          echo "Cleaning up"
          rm -rf Jackett*/
          rm Jackett.Binaries.Mono.tar.gz*
          if [ $wasactive == "active" ]
              then
                echo "Starting Jackett after update"
                  service jackett start
              else
                  echo "Jackett was not running before, so not starting it now"
              fi
        fi
    else
        echo "Jackett is up to date"
    fi

echo ""