#!/usr/bin/env bash
set -euo pipefail

if [ -t 1 ] && [ -z "${NO_COLOR:-}" ]; then
    red=$'\033[31m'
    green=$'\033[32m'
    yellow=$'\033[33m'
    reset=$'\033[0m'
else
    red=""
    green=""
    yellow=""
    reset=""
fi

printf "%sERROR%s disk space low\n" "$red" "$reset"
printf "%sOK%s backup completed\n" "$green" "$reset"
printf "%sWARN%s restart pending\n" "$yellow" "$reset"
printf "plain text after reset\n"