cowboy/rebar.config

{cover_enabled, true}.
{dialyzer_opts, [src, {warnings, [
	behaviours,
	error_handling,
	race_conditions,
	unmatched_returns
%%	underspecs
]}]}.
{erl_opts, [
%%	bin_opt_info,
	warnings_as_errors,
	warn_export_all
]}.