rebar/src/rebar_config.erl
2009-12-02 04:54:55 -07:00

104 lines
3.3 KiB
Erlang

%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.com)
%%
%% 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_config).
-export([new/1,
get_modules/2,
get_list/3,
get/3,
set_global/2, get_global/2]).
-include("rebar.hrl").
-record(config, { dir,
opts }).
%% ===================================================================
%% Public API
%% ===================================================================
new(Dir) ->
{ok, DefaultConfig} = application:get_env(rebar, default_config),
BaseDict = orddict:from_list(DefaultConfig),
%% Load terms from rebar.config, if it exists
ConfigFile = filename:join([Dir, "rebar.config"]),
case file:consult(ConfigFile) of
{ok, Terms} ->
Dict = merge_terms(Terms, BaseDict);
{error, enoent} ->
Dict = BaseDict;
Other ->
?WARN("Failed to load ~s: ~p\n", [ConfigFile, Other]),
?FAIL,
Dict = BaseDict
end,
#config { dir = Dir, opts = Dict }.
get_modules(Config, app) ->
get_list(Config, app_modules, []);
get_modules(Config, rel) ->
get_list(Config, rel_modules, []).
get_list(Config, Key, Default) ->
case orddict:find(Key, Config#config.opts) of
error ->
Default;
{ok, List} ->
List
end.
get(Config, Key, Default) ->
case orddict:find(Key, Config#config.opts) of
error ->
Default;
{ok, Value} ->
Value
end.
set_global(Key, Value) ->
application:set_env(rebar_global, Key, Value).
get_global(Key, Default) ->
case application:get_env(rebar_global, Key) of
undefined ->
Default;
{ok, Value} ->
Value
end.
%% ===================================================================
%% Internal functions
%% ===================================================================
merge_terms([], Dict) ->
Dict;
merge_terms([{Key, Value} | Rest], Dict) ->
merge_terms(Rest, orddict:store(Key, Value, Dict));
merge_terms([_ | Rest], Dict) ->
merge_terms(Rest, Dict).