rebar.config.script

% This file is part of Jiffy released under the MIT license.
% See the LICENSE file for more information.

% Only include PropEr as a dependency when the JIFFY_DEV
% environment variable is defined. This allows downstream
% applications to avoid requiring PropEr.
%
% This script is based on the example provided with Rebar.

IsRebar3 = erlang:function_exported(rebar3, main, 1),

PropErUrl = "git://github.com/manopapad/proper.git",
PortCompilerUrl = "git@github.com:blt/port_compiler.git",


IsDevEnv = begin
    ConfigPath = filename:dirname(SCRIPT),
    DevMarker = filename:join([ConfigPath, ".jiffy.dev"]),
    filelib:is_file(DevMarker)
end.

Deps = if not IsDevEnv -> []; true ->
    [{proper, ".*", {git, PropErUrl, {branch, "master"}}}]
end,

ErlOpts = if not IsDevEnv -> []; true ->
    [{d, 'JIFFY_DEV'}]
end,

Plugins = case IsRebar3 of
    true -> [{pc, {git, PortCompilerUrl, {branch, "master"}}}];
    false -> [rebar_gdb_plugin]
end,

ProviderHooks = if not IsRebar3 -> []; true ->
    [{pre, [
        {compile, {pc, compile}},
        {clean, {pc, clean}}
    ]}]
end,

OptsToAdd = [
    {deps, Deps},
    {erl_opts, ErlOpts},
    {plugins, Plugins},
    {provider_hooks, ProviderHooks}
],

AddOpt = fun(Name, Value, Config) when is_list(Value) ->
    case lists:keyfind(Name, 1, Config) of
        {Name, CurrVal} when is_list(CurrVal) ->
            lists:keyreplace(Name, 1, Config, {Name, CurrVal ++ Value});
        false ->
            Config ++ [{Name, Value}];
        _ ->
            Config
    end
end,

lists:foldl(fun({Name, Value}, CfgAcc) ->
    AddOpt(Name, Value, CfgAcc)
end, CONFIG, OptsToAdd).