Automatic Wine installer for Debian-based distros

WineInstaller.sh

#!/bin/sh
# Automatic Wine installer for Debian-based distros - Amaro M.

Fmt='printf'
DVER="winehq-stable"
VER=${1:-$DVER}
SF="%s\n"

NEED_ROOT='This script must be run as root.'
NOT_VALID_BRANCH='“%s” is not a valid branch name.\n'
NOT_DEBIAN_BASED='Not a Debian-based distro.'
DEBIAN_UNSUPPORTED='Unsupported Debian-based distro.'
WINE_REPO_NOT_FOUND='Wine repository “%s” not found.\n'
APT_UPDATE_BAD='Fix the apt update issues first, then try again.'
WINE_VER_NOT_FOUND='“%s” was not found in the repositories, so it could not be installed.\n'
NO_WINE_FOUND='No official Wine package has been found in the repositories.'
AVAILABLE_PACKAGES='The following packages are available:'
TRY_THESE_PACKAGES='Try again with any of these packages.'
SCRIPT_FAILED="An error caused Wine to not be fully installed."
SCRIPT_SUCCESS="Wine was successfully installed."

case "${LANGUAGE:-$LANG}" in
es*)
    NEED_ROOT='Este script debe ser ejecutado como root.'
    NOT_VALID_BRANCH='«%s» no es un nombre de rama válido.\n'
    NOT_DEBIAN_BASED='No es una distro basada en Debian.'
    DEBIAN_UNSUPPORTED='Distro basada en Debian no soportada.'
    WINE_REPO_NOT_FOUND='No se ha encontrado el repositorio de Wine «%s».\n'
    APT_UPDATE_BAD='Corrija primero los problemas de apt update y vuelva a intentarlo.'
    WINE_VER_NOT_FOUND='«%s» no se encontró en los repositorios, por lo que no se pudo instalar.\n'
    NO_WINE_FOUND='No se ha encontrado ningun paquete oficial de Wine en los repositorios.'
    AVAILABLE_PACKAGES='Están disponibles los siguientes paquetes:'
    TRY_THESE_PACKAGES='Inténtelo de nuevo con cualquiera de estos paquetes.'
    SCRIPT_FAILED='Un error hizo que Wine no se instalara completamente.'
    SCRIPT_SUCCESS='Wine se ha instalado con éxito.'
    ;;
esac

# Error.
E() {
    S=${2:-$SF}
    $Fmt >&2 "$S" "$1"
}
# Fatal Error, must quit.
Q() {
    E "$@"
    exit 1
}

[ "$(id -u)" -ne 0 ] && Q "$NEED_ROOT"

case "${VER}" in
"$DVER" | winehq-devel | winehq-staging) : ;;
*) Q "$VER" "$NOT_VALID_BRANCH" ;;
esac

! [ -f /etc/debian_version ] && Q "$NOT_DEBIAN_BASED"

case $(cat /etc/debian_version) in
*"buster"* | 10*) distro="buster" ;;
*"bullseye"* | 11*) distro="bullseye" ;;
*"bookworm"* | 12*) distro="bookworm" ;;
*"trixie"* | 13*) distro="trixie" ;;
*) Q "$DEBIAN_UNSUPPORTED" ;;
esac

wine_b="https://dl.winehq.org/wine-builds"
wine_b_url="$wine_b/debian/"

# Replace url and distro for Ubuntu-based distro.
case $(cat /etc/os-release) in
*"UBUNTU_CODENAME"*)
    wine_b_url=$wine_b/ubuntu/
    . /etc/os-release
    distro=$UBUNTU_CODENAME
    ;;
esac

# Validate repo.
wine_b_dists="$wine_b_url/dists/$distro/"
! wget --spider "$wine_b_dists" 2>/dev/null && Q "$wine_b_dists" "$WINE_REPO_NOT_FOUND"

sources_dir=/etc/apt/sources.list.d
apt -y update || Q "$APT_UPDATE_BAD"
dpkg --add-architecture i386
KEYSDIR="/usr/share/keyrings"
KEYFILE="$KEYSDIR/winehq-archive-keyring.gpg"
mkdir -p "$KEYSDIR"
wget -qO - $wine_b/winehq.key | gpg --dearmor >"$KEYFILE"
echo "deb [signed-by=$KEYFILE] $wine_b_url $distro main " >$sources_dir/winehq.list
[ "$distro" = "buster" ] && echo "deb http://deb.debian.org/debian buster-backports main " >$sources_dir/buster-backports.list
apt -y update || Q "$APT_UPDATE_BAD"
if ! apt-cache show "$VER" >/dev/null 2>&1; then
    E "$VER" "$WINE_VER_NOT_FOUND"
    FOUNDREL="$(apt search -qq --names-only 'winehq-*' 2>/dev/null)"
    if [ -z "$FOUNDREL" ]; then
        Q "$NO_WINE_FOUND"
    else
        E "$AVAILABLE_PACKAGES"
        E "$FOUNDREL"
        E
        Q "$TRY_THESE_PACKAGES"
    fi
fi
apt -y install --install-recommends "$VER" || Q "$SCRIPT_FAILED" && $Fmt "$SF" "$SCRIPT_SUCCESS"

exit 0

Probably I should use "DEBIAN_FRONTEND=noninteractive".