-module(rebar3_lfe_prv_release).

-export([init/1,
         do/1,
         format_error/1]).

-include("rebar3_lfe.hrl").

-define(PROVIDER, release).
-define(DEPS, [{?NAMESPACE, compile}]).

%% =============================================================================
%% Public API
%% =============================================================================

init(State) ->
    Description = "Build a release for the LFE project",
    Provider = providers:create([
        {namespace,  ?NAMESPACE},
        {name,       ?PROVIDER},
        {module,     ?MODULE},
        {bare,       true},
        {deps,       ?DEPS},
        {example,    "rebar3 release"},
        {opts,       []},
        {short_desc, Description},
        {desc,       info(Description)}
    ]),
    {ok, rebar_state:add_provider(State, Provider)}.

do(State) ->
    rebar_paths:set_paths([deps, plugins], State),
    update_all_app_files(State),
    %% Generate release
    rebar_relx:do(rlx_prv_release, "release", ?PROVIDER, State).

format_error(Reason) ->
    io_lib:format("~p", [Reason]).

%% =============================================================================
%% Internal functions
%% =============================================================================

info(Description) ->
    io_lib:format(
        "~n~s~n"
        "~n"
        "Prepares an LFE release-based project for an actual release and~n"
        "then generates all the files necessary to run that release,~n"
        "e.g., inproduction environments.~n",
        [Description]).

-spec update_all_app_files(rebar_state:t()) -> ok.
update_all_app_files(State) ->
    %% Update .app file for all apps
    DepsPaths   = rebar_state:code_paths(State, all_deps),
    ProjectApps = rebar_state:project_apps(State),
    AppsPaths   = [rebar_app_info:ebin_dir(AppInfo) || AppInfo <- ProjectApps],
    AllPaths    = DepsPaths ++ AppsPaths,
    [rebar3_lfe_utils:update_app_file(Dir)|| Dir <- AllPaths],
    ok.