%% Licensed to the Apache Software Foundation (ASF) under one
%% or more contributor license agreements.  See the NOTICE file
%% distributed with this work for additional information
%% regarding copyright ownership.  The ASF licenses this file
%% to you under the Apache License, Version 2.0 (the
%% "License"); you may not use this file except in compliance
%% with the License.  You may obtain a copy of the License at
%%
%%   http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied.  See the License for the
%% specific language governing permissions and limitations
%% under the License.
%%
%% @private

-module(systemd_app).

-behaviour(application).

-export([
    start/2,
    prep_stop/1,
    stop/1
]).

start(_Type, _Opts) ->
    case application:get_env(systemd, auto_formatter) of
        {ok, true} -> systemd_kmsg_formatter:auto_install();
        _ -> ok
    end,
    systemd_sup:start_link([]).

prep_stop(State) ->
    systemd:notify(persistent_term:get({systemd, shutdown}, stopping)),
    State.

stop(_State) ->
    ok.