Correctly deduplicate profiles when applying

Conflicts:
	src/rebar_state.erl

src/rebar_dir.erl

@@ -29,7 +29,7 @@ base_dir(State) ->
         ["default"]      -> ["default"];
         %% drop `default` from the profile dir if it's implicit and reverse order
         %%  of profiles to match order passed to `as`
-        ["default"|Rest] -> lists:reverse(Rest)
+        ["default"|Rest] -> Rest
     end,
     ProfilesDir = string:join(ProfilesStrings, "+"),
     filename:join(rebar_state:get(State, base_dir, ?DEFAULT_BASE_DIR), ProfilesDir).

src/rebar_state.erl

@@ -209,18 +209,25 @@ apply_profiles(State, [default]) ->
     State;
 apply_profiles(State=#state_t{opts=Opts, current_profiles=CurrentProfiles}, Profiles) ->
     ConfigProfiles = rebar_state:get(State, profiles, []),
-    {Profiles1, NewOpts} =
-        lists:foldl(fun(default, {ProfilesAcc, OptsAcc}) ->
-                            {ProfilesAcc, OptsAcc};
-                       (Profile, {ProfilesAcc, OptsAcc}) ->
-                            NewProfilesAcc = case lists:member(Profile, CurrentProfiles) of
-                                                false -> [Profile]++ProfilesAcc;
-                                                true -> ProfilesAcc
-                                             end,
+    NewOpts =
+        lists:foldl(fun(default, OptsAcc) ->
+                            OptsAcc;
+                       (Profile, OptsAcc) ->
                             ProfileOpts = dict:from_list(proplists:get_value(Profile, ConfigProfiles, [])),
-                            {NewProfilesAcc, merge_opts(Profile, ProfileOpts, OptsAcc)}
-                    end, {[], Opts}, Profiles),
-    State#state_t{current_profiles=CurrentProfiles++Profiles1, opts=NewOpts}.
+                            merge_opts(Profile, ProfileOpts, OptsAcc)
+                    end, Opts, Profiles),
+    State#state_t{current_profiles = deduplicate(CurrentProfiles ++ Profiles), opts=NewOpts}.
+
+deduplicate(Profiles) ->
+    do_deduplicate(lists:reverse(Profiles), []).
+
+do_deduplicate([], Acc) ->
+    Acc;
+do_deduplicate([Head | Rest], Acc) ->
+    case lists:member(Head, Acc) of
+        true -> do_deduplicate(Rest, Acc);
+        false -> do_deduplicate(Rest, [Head | Acc])
+    end.
 
 merge_opts(Profile, NewOpts, OldOpts) ->
     Opts = merge_opts(NewOpts, OldOpts),