Script for turn Debian in to a gaming desktop

debian-gamer.sh

#!/bin/bash

set -e

GREEN='\033[0;32m'
RED='\033[0;31m'
NC='\033[0m'

#Check sudo
if [ "$EUID" -eq 0 ]
    then echo -e "${RED}Don't run this script via sudo!${NC}"
    exit 1
fi

#Install wget
echo -e "${GREEN}Installing wget${NC}"
sudo apt install -y wget

function install_xanmod() {
    echo -e "${GREEN}Installing Linux Xanmod kernel${NC}"
    echo 'deb http://deb.xanmod.org releases main' | sudo tee /etc/apt/sources.list.d/xanmod-kernel.list
    wget -qO - https://dl.xanmod.org/gpg.key | sudo apt-key --keyring /etc/apt/trusted.gpg.d/xanmod-kernel.gpg add -
    sudo apt update && sudo apt install linux-xanmod -y
}

function fresh_drivers() {
    echo -e "${GREEN}Enable Advanced Hardware Support repo from MX Linux${NC}"
    echo 'deb http://mxrepo.com/mx/repo bullseye ahs' | sudo tee /etc/apt/sources.list.d/ahs.list
    cd /tmp
    wget -q http://mxrepo.com/mx/repo/pool/main/m/mx21-archive-keyring/mx21-archive-keyring_2021.2.19_all.deb
    sudo dpkg -i mx21-archive-keyring_2021.2.19_all.deb
    sudo apt update && sudo apt full-upgrade -y
}

function install_soft() {
    echo -e "${GREEN}Installing base gaming software${NC}"
    sudo apt update
    sudo apt install -y steam steam-devices lutris minigalaxy gamemode
}

function install_soft_flatpak() {
    echo -e "${GREEN}Installing additional gaming software${NC}"
    sudo apt install flatpak
    sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
    flatpak install -y com.obsproject.Studio
    flatpak install -y com.heroicgameslauncher.hgl
    flatpak install -y org.libretro.RetroArch
    flatpak install -y com.discordapp.Discord
    flatpak install -y com.usebottles.bottles
    flatpak install -y com.github.tchx84.Flatseal
}

function enable_repos() {
    echo -e "${GREEN}Activate 32-bit support and Non-Free repo${NC}"
    sudo dpkg --add-architecture i386
    sudo sed -i 's/main/main\ contrib\ non-free/g' /etc/apt/sources.list
    sudo apt update
}

function install_additional_drivers() {
    echo -e "${GREEN}Installing additional drivers${NC}"
    sudo apt install -y firmware-linux-nonfree firmware-misc-nonfree firmware-realtek firmware-atheros
}

echo -e "${GREEN}This script will help to turn your Debian in to a gaming desktop${NC}\n"
PS3='Please enter your choice: '
options=("Install all" "Xanmod kernel" "Fresh graphics drivers" "Software only (exept Flatpak)" "Software only (with Flatpak)" "Quit")
select opt in "${options[@]}"
do
    case $opt in
        "Install all")
            enable_repos
            install_xanmod
            fresh_drivers
            install_additional_drivers
            install_soft
            install_soft_flatpak
            break
            ;;
        "Xanmod kernel")
            install_xanmod
            install_additional_drivers
            break
            ;;
        "Fresh graphics drivers")
            fresh_drivers
            break
            ;;
        "Software only (exept Flatpak)")
            enable_repos
            install_soft
            break
            ;;
        "Software only (with Flatpak)")
            enable_repos
            install_soft
            install_soft_flatpak
            break
            ;;
        "Quit")
            break
            ;;
        *) echo -e "${RED}invalid option $REPLY";;
    esac
done