{cover_enabled, true}.
{erl_opts, [debug_info, fail_on_warning]}.
{eunit_opts,
 [verbose,
  %% eunit truncates output from tests - capture full output in
  %% XML files in .eunit
  {report,{eunit_surefire,[{dir,"."}]}}]}.
{profiles, [{printf_debugging, [{erl_opts, [{d, 'EM_DEBUG'}]}]}]}.
{plugins, [rebar3_hex]}.