Script to backup and upgrade ghost blog deployed on a digitalocean droplet

upgrade_ghost.sh

GHOST_LOCATION="/var/www"
BACKUP_PATH="/home/migara/backups/"

function check {
    "$@"
    local status=$?
    if [ $status -ne 0 ]; then
        echo "error with $1" >&2
	exit 1
    fi
    return $status
}

function stop_ghost {
  echo "Stopping Ghost"
  check sudo service ghost stop
  echo "Ghost Stopped"
}

function start_ghost {
  echo "Starting Ghost"
  check sudo service ghost start
  echo "Ghost Started"
}

function backup {
  # mv server.log logs/.log
  echo "Starting Backup"

  FILENAME="ghost_backup_$(date -d "today" +"%Y%m%d%H%M").tar.gz"

  check mkdir -p $BACKUP_PATH

  check cd "$GHOST_LOCATION/ghost"
  check tar -zcvf $FILENAME content/
  check mv $FILENAME $BACKUP_PATH$FILENAME

  echo "Backup Complete"
}

function update {
  echo "Starting update"

  stop_ghost

  backup

  check cd "$GHOST_LOCATION"
  check wget http://ghost.org/zip/ghost-latest.zip
  check rm -rf ghost/core
  check unzip -uo ghost-latest.zip -d ghost
  check chown -R ghost:ghost ghost/*
  check cd ghost
  check sudo npm install --production

  start_ghost
  
  check cd "$GHOST_LOCATION"
  check rm -f ghost-latest.zip

  echo "Update Complete"
}

# ensure root
if [ "$(id -u)" != "0" ]; then
  exec sudo "$0" "$@"
fi

update