#!/bin/bash

notify_err() {
  say "errexit on line $(caller)"
  say "Error messages can be found at the end of setup.log"
  exit 1
}

trap notify_err ERR

# Message
function say() {
  echo "TALER: " "$@" >> setup.log
  echo "TALER: " "$@"
}

# Check user if the user is root
function check_user() {
  if [ "$(whoami)" != "root" ]; then
    say "Please run this script as root"
    exit 1
  fi
}

# Set DISTRO to the detected distro or return non-zero
# status if distro not supported.
function detect_distro() {
  unset DISTRO
  [[ -f /etc/os-release ]] && source /etc/os-release
  # shellcheck disable=SC2034
  echo $NAME | grep Ubuntu >/dev/null && DISTRO=ubuntu && return 0
  # shellcheck disable=SC2034
  echo $NAME | grep Debian >/dev/null && DISTRO=debian && return 0
  echo "Unsupported distro, should be either ubuntu or debian" >&2
  return 1
}