{ config, pkgs, ... }:
with pkgs;
with lib;
rec {
  sort = builtins.sort (a: b:
    if builtins.isList a && builtins.isList b
    then compareLists a b
    else a < b
  );
  sortBy = f: builtins.sort (a: b:
    let
      ra = f a;
      rb = f b;
    in
      if builtins.isList ra && builtins.isList rb
      then compareLists compare ra rb < 0
      else ra < rb
  );
  sortNetsByVlan = builtins.sort (net1: net2:
    let
      vlan1 = config.site.net.${net1}.vlan;
      vlan2 = config.site.net.${net2}.vlan;
    in if vlan1 == null
       then true
       else if vlan2 == null
       then false
       else vlan1 < vlan2
  );
}