update-server.sh

#!/bin/bash -x
set -e

# COMMAND
# ssh into the required server and run the following command
# curl -Lks https://gist.github.com/pacharanero/4b9730d20ed750a7dea8ffc37aafb770/raw | sudo /bin/bash

#function definitions
update-ubuntu() {
  echo "Starting update..."

  local aptDate="$(stat -c %Y '/var/cache/apt')"
  local nowDate="$(date +'%s')"
  local updateInterval=$((60 * 60 * 24))
  echo "update performed last:" $((nowDate - aptDate)) "seconds ago"

  # check when the last update was performed
  if [ $((nowDate - aptDate)) -gt $updateInterval ]
    then
    echo "Starting OS update..."
    if """
      export DEBIAN_FRONTEND=noninteractive &&
      sudo apt-get update &&
      sudo apt-get -y dist-upgrade &&
      sudo apt-get -y autoremove &&
      sudo apt-get -y autoclean"""
    then
      echo "OS update completed successfully."
    else
      echo "Error occurred while updating OS. Stopping the script."
      exit 1
    fi
  else
    echo "Skipping OS update. Last OS update was performed less than 24 hours ago."
  fi

  # discourse updates (if applicable)
  if [ -d /var/discourse ]
  then
    echo "Checking Discourse repository status..."
    # Check if the local repository is up-to-date with the remote repository
    local_commit=$(cd /var/discourse && git rev-parse HEAD)
    remote_commit=$(cd /var/discourse && git fetch origin && git rev-parse origin/master)

    if [ "$local_commit" != "$remote_commit" ]
    then
      echo "Starting Discourse update..."
      if
        cd /var/discourse;
        git pull;
        ./launcher rebuild app;
        echo Y Y Y | ./launcher cleanup
      then
        echo -e "\e[31m\nDiscourse update completed successfully.\e[0m"
      else
        echo -e "\e[31m\nError occurred while updating Discourse. Stopping the script.\e[0m"
        exit 1
      fi
    else
      echo "\e[31m\nDiscourse is up-to-date.\e[0m"
    fi
  else
    echo -e "\e[31m\nNo Discourse installation found.\e[0m"
  fi

  # perform reboot (if required)
  if cat /var/run/reboot-required
  then
    echo -e "\e[31m OS reboot is required\n\n\n\e[0m"
    sudo reboot now
  else
    echo -e "\e[32mOS reboot is not required\n\n\n\e[0m"
  fi
}

update-ubuntu