# shellcheck shell=bash

require_supported_ubuntu() {
  if [[ ! -r /etc/os-release ]] || ! command -v dpkg >/dev/null 2>&1; then
    printf 'CRITICAL: Ubuntu release detection requires /etc/os-release and dpkg\n' >&2
    exit 2
  fi

  # shellcheck disable=SC1091
  source /etc/os-release
  if [[ "${ID:-}" != "ubuntu" ]]; then
    printf 'CRITICAL: this toolkit supports Ubuntu only; detected %s\n' "${ID:-unknown}" >&2
    exit 2
  fi
  if ! dpkg --compare-versions "${VERSION_ID:-0}" ge "24.04"; then
    printf 'CRITICAL: Ubuntu 24.04 or newer is required; detected %s\n' \
      "${VERSION_ID:-unknown}" >&2
    exit 2
  fi
}