CLI GUI for linux system update and upgrade

system-updater.sh

#!/bin/bash
# system-updater
# ---
# CLI GUI for system update and upgrade
# --------------------------------------------------------
# author: Ivan Pro Tools
# github: https://github.com/colorwebdesigner
# date: 17-01-2022
# license: GNU
# --------------------------------------------------------
# Arguments:
#
# [  ] -
# [  ] -
#
# Sample usage in the bottom
# ========================================================

# DEBUGGER On/Off
# set -x

# DEFAULT VARIABLES
# -------------------------
DEVNAME="Ivan Pro Tools"
LICENSE="GNU"
GITURL="https://github.com/colorwebdesigner"

# MAIN FUNCTION
# ---------------------------
system-updater () {

  # Local variables
  # -------------------------
  local status msg lang

  # Dependencies
  # -------------------------
  function banner () {
    local banner="
    ---------------------------------
    ${1} by ${DEVNAME}
    ---------------------------------\n"
    printf "${banner}"
  }

  function stepTitle() {
    printf "  --> ${c[y]}${1} ${c[n]}"
    tput sc && printf "\n"
    return 0
  }

  function stepResult () {
    local report=${2:-done}
    if [ $1 -eq 0 ]; then
      tput rc && tput ed && printf "${c[g]}${report}${c[n]}\n"
    elif [ $1 -eq 1 ]; then
      tput rc && printf "${c[r]}error ${1}${c[n]}\n" && exit 1
    else
      tput rc && tput ed && tput cnorm
      printf "${c[g]}${report}${c[n]}\n\n" && exit 1
    fi
    unset status
    return 0
  }

  function checkForUpdate() {
    local string="apt list --upgradable"
    sudo apt update
    msg="$(sudo apt update 2>/dev/null | grep "${string}" | cut -d '.' -f 1)"
    [[ $msg ]] && return 0 || return 2
  }

  function listUpdate() {

    tput civis && IFS=$'\n'
    data=($(sudo apt list --upgradable 2>/dev/null)); unset 'data[0]'

    for line in "${data[@]}"; do
      printf "%s\n" "  --> ${line}"
    done

    while true; do
      tput rc && read -er -n1 -p "${c[y]}Install this updates? ${c[c]}[y/enter] [n]${c[n]}" reply
      case ${reply} in
        [Yy]|"" ) tput cnorm; msg="${c[y]}Update: ${c[g]}yes${c[n]}"; break;;
        [Nn] ) tput cnorm; exit 1;;
        * ) continue;;
      esac
    done

    IFS=$' ' && return 0
  }

  function installUpdate() {
    tput civis
    sudo apt -y dist-upgrade
    sudo apt autoremove --purge
    tput cnorm && return 0
  }

  # DO THE JOB
  # -------------------------
  banner $FUNCNAME

  # -------------------------
  # [1] Check for updates
  # -------------------------
  stepTitle 'Check for updates:'
  checkForUpdate; status=$?
  stepResult $status "${msg:-все пакеты имеют последние версии}"

  # -------------------------
  # [2] Manage updates
  # -------------------------
  printf "  --> " && tput sc && printf "\n"
  listUpdate; status=$?
  stepResult $status "${msg}"

  # -------------------------
  # [3] Install updates
  # -------------------------
  stepTitle 'Installation:'
  installUpdate; status=$?
  stepResult $status

  # Exit function
  unset status msg
  printf "\n" && exit 0
}

# Declare array with color values to colorise output
declare -A c=( ['c']='' ['y']='' ['r']='' ['g']='' ['n']='' )

# Sample usage
system-updater "$@"