rebar.config.script

%%% FIND DTOs
DTOs =
    case file:list_dir("_gen/dtos/") of
        {ok, Filenames} ->
            Filenames;
        {error, enoent} ->
            []
    end.
DTOMods = lists:map(
    fun(File) ->
        [DTO | _Extension] = string:split(File, ".erl", trailing),
        erlang:list_to_atom(DTO)
    end,
    DTOs
).

%%% DIALYZER
RawDialyzerConf =
    case lists:keyfind(dialyzer, 1, CONFIG) of
        false ->
            [];
        {dialyzer, Dialyzer} ->
            Dialyzer
    end.
RawDialyzerExcludeMods =
    case lists:keyfind(exclude_mods, 1, RawDialyzerConf) of
        false ->
            [];
        {exclude_mods, ExcludeMods} ->
            ExcludeMods
    end.
DialyzerExcludeMods = RawDialyzerExcludeMods ++ DTOMods.
DialyzerConf =
    {dialyzer,
        lists:keystore(exclude_mods, 1, RawDialyzerConf, {exclude_mods, DialyzerExcludeMods})}.

%%% XREF
RawXRefIgnores =
    case lists:keyfind(xref_ignores, 1, CONFIG) of
        false ->
            [];
        {xref_ignores, Ignores} ->
            Ignores
    end.
XRefIgnores = {xref_ignores, RawXRefIgnores ++ DTOMods}.

%%% COVER
RawCoverExcludeMods =
    case lists:keyfind(cover_excl_mods, 1, CONFIG) of
        false ->
            [];
        {cover_excl_mods, CoverExclude} ->
            CoverExclude
    end.
CoverExcludeMods = {cover_excl_mods, RawCoverExcludeMods ++ DTOMods}.

%%% GRADUALIZER
RawGradualizerOpts =
    case lists:keyfind(gradualizer_opts, 1, CONFIG) of
        false ->
            [];
        {gradualizer_opts, Gradualizer} ->
            Gradualizer
    end.
RawGradualizerExcludes =
    case lists:keyfind(exclude, 1, RawGradualizerOpts) of
        false ->
            [];
        {exclude, Excludes} ->
            Excludes
    end.
GradualizerExcludes =
    RawGradualizerExcludes ++ lists:map(fun(Filename) -> "_gen/dtos/" ++ Filename end, DTOs).
GradualizerOpts =
    {gradualizer_opts,
        lists:keystore(exclude, 1, RawGradualizerOpts, {exclude, GradualizerExcludes})}.

%%% UPDATE CONFIG
CONFIG1 = lists:keystore(dialyzer, 1, CONFIG, DialyzerConf).
CONFIG2 = lists:keystore(xref_ignores, 1, CONFIG1, XRefIgnores).
CONFIG3 = lists:keystore(cover_excl_mods, 1, CONFIG2, CoverExcludeMods).
lists:keystore(gradualizer_opts, 1, CONFIG3, GradualizerOpts).