{Vars, ElixirApps} = case file:consult(filename:join([filename:dirname(SCRIPT), "..", "vars.config"])) of
    {ok, Terms} ->
        Backends = [mssql, mysql, odbc, pgsql, redis, sqlite],
        EBs = lists:filter(fun(Backend) -> lists:member({Backend, true}, Terms) end, Backends),
        Elixirs = case lists:keyfind(elixir, 1, Terms) of
            {elixir, true} -> [elixir, iex, logger, mix];
            _ -> []
        end,
        Tools = case lists:keyfind(tools, 1, Terms) of
            {tools, true} -> [observer, runtime_tools]; % for `ejabberdctl etop`
            _ -> []
        end,
        {[lists:keyfind(description, 1, Terms),
         lists:keyfind(vsn, 1, Terms),
         {env, [{enabled_backends, EBs}]}
        ], Elixirs ++ Tools};
    _Err ->
        {[], []}
    end,

{application, ejabberd,
 Vars ++
 [{modules, []},
  {registered, []},
  {applications, [kernel, sasl, ssl, stdlib, syntax_tools]},
  {included_applications,
    [compiler, inets, mnesia, os_mon,
     cache_tab,
     eimp,
     fast_tls,
     fast_xml,
     fast_yaml,
     p1_acme,
     p1_utils,
     pkix,
     stringprep,
     yconf,
     xmpp | ElixirApps]},
  {mod, {ejabberd_app, []}}]}.

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