rebar.config.script

true = os:putenv(
    "ERTS_INCLUDE",
    filename:join([
        code:root_dir(),
        io_lib:format("erts-~ts", [erlang:system_info(version)]),
        "include"
    ])
),

CONFIG1 = case os:getenv("ORANIF_DEBUG") of
    false -> CONFIG; % env var not defined
    []    -> CONFIG; % env var set to empty string
    DebugLevelStr ->
        DebugLevel = list_to_integer(DebugLevelStr),
        ErlOpts = proplists:get_value(erl_opts, CONFIG, []),
        {CheckErlOpts, Replaced} = lists:foldl(
            fun
                ({d, 'ORANIF_DEBUG', _}, {Acc, false}) ->
                    {[{d, 'ORANIF_DEBUG', DebugLevel} | Acc], true};
                (Member, {Acc, R}) ->
                    {[Member | Acc], R}
            end, {[], false}, ErlOpts
        ),
        NewErlOpts = if
            Replaced -> CheckErlOpts;
            true -> [{d, 'ORANIF_DEBUG', DebugLevel} | CheckErlOpts]
        end,
        lists:keyreplace(erl_opts, 1, CONFIG, {erl_opts, NewErlOpts})
end,

case os:getenv("TRAVIS") of
    "true" ->
        JobId = os:getenv("TRAVIS_JOB_ID"),
        lists:keystore(coveralls_service_job_id, 1, CONFIG1,
                      {coveralls_service_job_id, JobId});
    _ -> CONFIG1
end.