%% -*- 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)
%%
%% 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_require_vsn).

-include("rebar.hrl").

-export([compile/2,
         eunit/2]).

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

compile(Config, _) ->
    check_versions(Config).

eunit(Config, _) ->
    check_versions(Config).

check_versions(Config) ->
    ErtsRegex = rebar_config:get(Config, require_erts_vsn, ".*"),
    ReOpts = [{capture, none}],
    case re:run(erlang:system_info(version), ErtsRegex, ReOpts) of
        match ->
            ?DEBUG("Matched required ERTS version: ~s -> ~s\n",
                   [erlang:system_info(version), ErtsRegex]);
        nomatch ->
            ?ABORT("ERTS version ~s does not match required regex ~s\n",
                   [erlang:system_info(version), ErtsRegex])
    end,

    OtpRegex = rebar_config:get(Config, require_otp_vsn, ".*"),
    case re:run(erlang:system_info(otp_release), OtpRegex, ReOpts) of
        match ->
            ?DEBUG("Matched required OTP release: ~s -> ~s\n",
                   [erlang:system_info(otp_release), OtpRegex]);
        nomatch ->
            ?ABORT("OTP release ~s does not match required regex ~s\n",
                   [erlang:system_info(otp_release), OtpRegex])
    end.