%% -*- erlang-indent-level: 4; indent-tabs-mode: nil; fill-column: 80 -*-
%%% Copyright 2012 Erlware, LLC. All Rights Reserved.
%%%
%%% This file is provided 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.
%%%---------------------------------------------------------------------------
%%% @author Eric Merritt <[email protected]>
%%% @copyright (C) 2012 Erlware, LLC.
%%%
-module(rlx_prv_rel_discover).
-behaviour(provider).
-export([init/1,
do/1,
format_error/1]).
-include("relx.hrl").
-define(PROVIDER, rel_discover).
-define(DEPS, [app_discover]).
%%============================================================================
%% API
%%============================================================================
-spec init(rlx_state:t()) -> {ok, rlx_state:t()}.
init(State) ->
State1 = rlx_state:add_provider(State, providers:create([{name, ?PROVIDER},
{module, ?MODULE},
{deps, ?DEPS}])),
{ok, State1}.
-spec do(rlx_state:t()) -> {ok, rlx_state:t()} | relx:error().
do(State0) ->
LibDirs = get_lib_dirs(State0),
AppMeta = rlx_state:available_apps(State0),
case rlx_rel_discovery:do(State0, LibDirs, AppMeta) of
{ok, Releases} ->
{ok, rlx_state:realized_releases(State0, lists:foldl(fun add/2,
ec_dictionary:new(ec_dict),
Releases))};
Error ->
Error
end.
-spec format_error(any()) -> iolist().
format_error(_) ->
"".
%%%===================================================================
%%% Internal Functions
%%%===================================================================
%% @doc only add the release if its not documented in the system
add(Rel, Dict) ->
RelName = rlx_release:name(Rel),
RelVsn = rlx_release:vsn(Rel),
ec_dictionary:add({RelName, RelVsn}, Rel, Dict).
get_lib_dirs(State) ->
LibDirs0 = rlx_state:lib_dirs(State),
case rlx_state:get(State, default_libs, true) of
false ->
LibDirs0;
true ->
lists:flatten([LibDirs0,
add_release_output_dir(State)])
end.
add_release_output_dir(State) ->
case rlx_state:get(State, disable_discover_release_output, false) of
true ->
[];
false ->
Output = erlang:iolist_to_binary(rlx_state:base_output_dir(State)),
case ec_file:exists(erlang:binary_to_list(Output)) of
true ->
Output;
false ->
[]
end
end.
