Update script Wilhelm-af/StarRupture-ModLoader

update-wilhelm-sr-modloader.sh

#!/bin/bash

DIR_SOURCE="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
#script needs elevated privileges
if [ ${UID} != 0 ];then
        err "script should be run as root or sudo"
fi

LANG=C
APP_GITHUB_URL="https://github.com/Wilhelm-af/StarRupture-ModLoader"
APP_SERVICE_NAME=netbox.service
APP_HOME="/home/steam/.local/share/Steam/steamapps/common/StarRupture Dedicated Server/StarRupture/Binaries/Win64"
APP_BIN_USER_GROUP="steam:steam"

APP_GITHUB_LATEST_URL=$(wget -O /dev/null "${APP_GITHUB_URL}/releases/latest" 2>&1 | grep -w "Location:" | sed -nE "s,Location: (${APP_GITHUB_URL}"'/releases(/tag)?/v?[[:digit:]\.]+).+,\1,p' -)
APP_GITHUB_LATEST_VER=$(echo "${APP_GITHUB_LATEST_URL}" | sed -nE "s,${APP_GITHUB_URL}"'/releases(/tag)?/v?([[:digit:]\.]+),\2,p' -)

if [[ -f "${APP_HOME}/dwmapi.ver" && $(cat "${APP_HOME}/dwmapi.ver") == "$APP_GITHUB_LATEST_VER" ]]; then
    echo "Already up-to-date"
    exit 1
fi

TMPFILE=$(mktemp)
curl --fail --silent --location  --output "${TMPFILE}" "${APP_GITHUB_URL}/releases/download/v${APP_GITHUB_LATEST_VER}/StarRupture-ModLoader-v${APP_GITHUB_LATEST_VER}.zip"
rm "${APP_HOME}/dwmapi.dll"
unzip "${TMPFILE}" -d "${APP_HOME}" > /dev/null
chown -R "${APP_BIN_USER_GROUP}" "${APP_HOME}/dwmapi.dll"

echo "StarRupture-ModLoader updated from "$(cat "${APP_HOME}/dwmapi.ver")" to ${APP_GITHUB_LATEST_VER}"
echo "${APP_GITHUB_LATEST_VER}" > "${APP_HOME}/dwmapi.ver"
exit 0