Options merge

opts_utils.erl

-module(opts_utils).

-export([merge_opts/2]).

%% Sample use:
%% Defaults = [{host,"localhost"},
%%             {password, []},
%%            {port,5432},
%%            {password,[]},
%%            {username,"test"},
%%            {database,"test"},
%%            {schema,"public"}].
%% merge_opts([{password, "topsecret"}], Defaults).
%%
merge_opts(Opts, Defaults) ->
    SOpts = lists:ukeysort(1, proplists:unfold(Opts)),
    proplists:normalize(lists:ukeymerge(1, SOpts, Defaults), []).