#!/usr/bin/env bash
set -e
set -u
set -o pipefail

# Ensure running as root
if [ $EUID != 0 ]; then
    sudo "$0" "$@"
    exit $?
fi

# Determining the current OS
if [ -f /etc/os-release ]; then
  # freedesktop.org and systemd
  . /etc/os-release
  OS=$NAME
  VER=$VERSION_ID
elif type lsb_release >/dev/null 2>&1; then
  # linuxbase.org
  OS=$(lsb_release -si)
  VER=$(lsb_release -sr)
elif [ -f /etc/lsb-release ]; then
  # For some versions of Debian/Ubuntu without lsb_release command
  . /etc/lsb-release
  OS=$DISTRIB_ID
  VER=$DISTRIB_RELEASE
elif [ -f /etc/debian_version ]; then
  # Older Debian/Ubuntu/etc.
  OS=Debian
  VER=$(cat /etc/debian_version)
else
  # Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
  OS=$(uname -s)
  VER=$(uname -r)
fi

# Update commands per OS
case $OS in
  Fedora\ Linux)
    dnf upgrade --refresh;
    flatpak update --assumeyes;
    ;;
  *)
    echo "Cannot update system with OS: " $OS
    ;;
esac