only allow relcool to take a single config

1 files changed, 9 insertions, 4 deletions

diff --git a/src/rcl_cmd_args.erl b/src/rcl_cmd_args.erl
index dc176be..3bb9f41 100644
--- a/src/rcl_cmd_args.erl
+++ b/src/rcl_cmd_args.erl
@@ -34,7 +34,8 @@
                         relcool:error().
 args2state({error, Detail}) ->
     ?RCL_ERROR({opt_parse, Detail});
-args2state({ok, {Opts, Targets}}) ->
+args2state({ok, {Opts, Target}})
+  when erlang:length(Target) == 0; erlang:length(Target) == 1 ->
     RelName = proplists:get_value(relname, Opts, undefined),
     RelVsn = proplists:get_value(relvsn, Opts, undefined),
     case create_log(Opts,
@@ -43,15 +44,19 @@ args2state({ok, {Opts, Targets}}) ->
         Error = {error, _} ->
             Error;
         {ok, CommandLineConfig} ->
-            case validate_configs(Targets) of
+            case validate_configs(Target) of
                 Error = {error, _} ->
                     Error;
                 {ok, Configs} ->
-                    {ok, {rcl_state:new(CommandLineConfig, Configs), Configs}}
+                    {ok, rcl_state:new(CommandLineConfig, Configs)}
             end
-    end.
+    end;
+args2state({ok, {_Opts, Targets}}) ->
+    ?RCL_ERROR({invalid_targets, Targets}).
 
 -spec format_error(Reason::term()) -> iolist().
+format_error({invalid_targets, Targets}) ->
+    io_lib:format("One config must be specified! not ~p~n", [Targets]);
 format_error({opt_parse, {invalid_option, Opt}}) ->
     io_lib:format("invalid option ~s~n", [Opt]);
 format_error({opt_parse, Arg}) ->