Avoid backward-compatibility-breaking changes.

src/rebar_file_utils.erl

@@ -72,14 +72,16 @@ consult_config(State, Filename) ->
         [T] -> T;
         [] -> []
     end,
-    lists:flatmap(
-      fun (SubConfig) when is_list(SubConfig) ->
-        case consult_config(State, SubConfig) of
-          [] -> consult_config(State, SubConfig ++ ".config");
-          X -> X
-        end;
-          (Entry) -> [Entry]
-      end, Config).
+    JoinedConfig = lists:flatmap(
+        fun (SubConfig) when is_list(SubConfig) ->
+            case lists:suffix(".config", SubConfig) of
+                false -> consult_config(State, SubConfig ++ ".config");
+                true -> consult_config(State, SubConfig)
+            end;
+            (Entry) -> [Entry]
+      end, Config),
+    %% Backwards compatibility
+    [JoinedConfig].
 
 format_error({bad_term_file, AppFile, Reason}) ->
     io_lib:format("Error reading file ~s: ~s", [AppFile, file:format_error(Reason)]).

src/rebar_prv_common_test.erl

@@ -218,9 +218,9 @@ select_tests(_, _, _, {error, _} = Error) -> Error;
 select_tests(State, ProjectApps, CmdOpts, CfgOpts) ->
     %% set application env if sys_config argument is provided
     SysConfigs = sys_config_list(CmdOpts, CfgOpts),
-    Configs = lists:map(fun(Filename) ->
-                            rebar_file_utils:consult_config(State, Filename)
-                        end, SysConfigs),
+    Configs = lists:flatmap(fun(Filename) ->
+                                rebar_file_utils:consult_config(State, Filename)
+                            end, SysConfigs),
     code:add_pathsa(rebar_state:code_paths(State, all_deps)),
     [application:load(Application) || Config <- Configs, {Application, _} <- Config],
     rebar_utils:reread_config(Configs),

src/rebar_prv_shell.erl

@@ -331,8 +331,8 @@ reread_config(State) ->
     case find_config(State) of
         no_config ->
             ok;
-        Config ->
-            _ = rebar_utils:reread_config([Config]),
+        ConfigList ->
+            _ = rebar_utils:reread_config(ConfigList),
             ok
     end.