rebar3_script_config

ReplaceIncludeErts =
fun(Path, Config) ->
    ReplaceRelx(include_erts, Path, Config)
end,

ReplaceSystemLibs =
fun(Path, Config) ->
    ReplaceRelx(system_libs, Path, Config)
end,

EnvTargetIncludeErts = os:getenv("REBAR3_TARGET_INCLUDE_ERTS"),
EnvTargetSystemLibs = os:getenv("REBAR3_TARGET_SYSTEM_LIBS"),

Check = {EnvTargetIncludeErts, EnvTargetSystemLibs},
case Check of
    {false, false} ->
        CONFIG;
    {IncludeErts, false} ->
        ReplaceIncludeErts(IncludeErts, CONFIG);
    {false, SystemLibs} ->
        ReplaceSystemLibs(SystemLibs, CONFIG);
    {IncludeErts, SystemLibs} ->
        CONFIG1 = ReplaceIncludeErts(IncludeErts, CONFIG),
        ReplaceSystemLibs(SystemLibs, CONFIG1)
end.