#!/usr/bin/env bash

readonly getenv_dir="$(cd "$(dirname -- "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
get_os_version() {
  local os_version=
  local utils_version=

  os_version="$(bash "${getenv_dir}/distro.sh" | sed 's/ /_/g')"

  bash_version="$(bash --version | sed -n '/bash, [Vv]ersion/p' | sed 's/.*[Vv]ersion \([0-9.]\+\).*/\1/g')"

  if utils_version="$(readlink --version 2>&1 | grep -E "BusyBox")" ; then
    utils_version="$(sed 's/\(BusyBox v[0-9\.]\+\).*/\1/g' <<<${utils_version})"
  elif utils_version="$(readlink --version 2>&1 | grep -E "GNU core")" ; then
    utils_version="$(sed 's/.*\(GNU [[:alnum:]]\+\). \([0-9\.]\+\).*/\1 \2/g' <<<${utils_version})"
  else
    utils_version="utils_unkown"
  fi
  # Replace " " with _
  utils_version="${utils_version// /_}"

  echo "${os_version}_${bash_version:+bash_${bash_version}}_${utils_version}"
}

get_os_version