%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.com),
%%                    Tim Dysinger (tim@dysinger.net)
%%
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%%
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%%
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
%% -------------------------------------------------------------------

-module(rebar_lfe_compiler).

-export([compile/2]).

%% for internal use only
-export([info/2]).

-include("rebar.hrl").

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

compile(Config, _AppFile) ->
    FirstFiles = rebar_config:get_list(Config, lfe_first_files, []),
    rebar_base_compiler:run(Config, FirstFiles, "src", ".lfe", "ebin", ".beam",
                            fun compile_lfe/3).

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

info(help, compile) ->
    ?CONSOLE(
       "Build Lisp Flavoured Erlang (*.lfe) sources.~n"
       "~n"
       "Valid rebar.config options:~n"
       "  erl_opts is reused.'~n",
       []).

compile_lfe(Source, _Target, Config) ->
    case code:which(lfe_comp) of
        non_existing ->
            ?ERROR("~n"
                   "*** MISSING LFE COMPILER ***~n"
                   "  You must do one of the following:~n"
                   "    a) Install LFE globally in your erl libs~n"
                   "    b) Add LFE as a dep for your project, eg:~n"
                   "       {lfe, \"0.6.1\",~n"
                   "        {git, \"git://github.com/rvirding/lfe\",~n"
                   "         {tag, \"v0.6.1\"}}}~n"
                   "~n", []),
            ?FAIL;
        _ ->
            ErlOpts = rebar_utils:erl_opts(Config),
            LfeOpts = [report, verbose, {i, "include"}, {outdir, "ebin"},
                       return],
            Opts = LfeOpts ++ ErlOpts,
            case lfe_comp:file(Source, Opts) of
                {ok, _Mod, Ws} ->
                    rebar_base_compiler:ok_tuple(Config, Source, Ws);
                {error, Es, Ws} ->
                    rebar_base_compiler:error_tuple(Config, Source,
                                                    Es, Ws, Opts);
                _ ->
                    ?FAIL
            end
    end.