chore: fix elvis warnings

apps/emqx_coap/src/emqx_coap_mqtt_adapter.erl

@@ -139,7 +139,7 @@ handle_call({subscribe, Topic, CoapPid}, _From, State=#state{sub_topics = TopicL
     NewTopics = proplists:delete(Topic, TopicList),
     IsWild = emqx_topic:wildcard(Topic),
     {reply, chann_subscribe(Topic, State), State#state{sub_topics =
-        [{Topic, {IsWild, CoapPid}}|NewTopics]}, hibernate};
+        [{Topic, {IsWild, CoapPid}} | NewTopics]}, hibernate};
 
 handle_call({unsubscribe, Topic, _CoapPid}, _From, State=#state{sub_topics = TopicList}) ->
     NewTopics = proplists:delete(Topic, TopicList),
@@ -281,7 +281,7 @@ do_deliver({Topic, Payload}, Subscribers) ->
 
 deliver_to_coap(_TopicName, _Payload, []) ->
     ok;
-deliver_to_coap(TopicName, Payload, [{TopicFilter, {IsWild, CoapPid}}|T]) ->
+deliver_to_coap(TopicName, Payload, [{TopicFilter, {IsWild, CoapPid}} | T]) ->
     Matched =   case IsWild of
                     true  -> emqx_topic:match(TopicName, TopicFilter);
                     false -> TopicName =:= TopicFilter

apps/emqx_exproto/src/emqx_exproto_channel.erl

@@ -606,8 +606,6 @@ default_conninfo(ConnInfo) ->
     ConnInfo#{clean_start => true,
               clientid => undefined,
               username => undefined,
-              proto_name => undefined,
-              proto_ver => undefined,
               conn_props => #{},
               connected => true,
               connected_at => erlang:system_time(millisecond),

apps/emqx_lwm2m/src/emqx_lwm2m_protocol.erl

@@ -74,7 +74,8 @@ call(Pid, Msg, Timeout) ->
         Error -> {error, Error}
     end.
 
-init(CoapPid, EndpointName, Peername = {_Peerhost, _Port}, RegInfo = #{<<"lt">> := LifeTime, <<"lwm2m">> := Ver}) ->
+init(CoapPid, EndpointName, Peername = {_Peerhost, _Port},
+     RegInfo = #{<<"lt">> := LifeTime, <<"lwm2m">> := Ver}) ->
     Mountpoint = proplists:get_value(mountpoint, lwm2m_coap_responder:options(), ""),
     Lwm2mState = #lwm2m_state{peername = Peername,
                               endpoint_name = EndpointName,
@@ -103,9 +104,10 @@ init(CoapPid, EndpointName, Peername = {_Peerhost, _Port}, RegInfo = #{<<"lt">>
                 emqx_cm:register_channel(EndpointName, CoapPid, conninfo(Lwm2mState1))
             end),
             emqx_cm:insert_channel_info(EndpointName, info(Lwm2mState1), stats(Lwm2mState1)),
-	    emqx_lwm2m_cm:register_channel(EndpointName, RegInfo, LifeTime, Ver, Peername),
+            emqx_lwm2m_cm:register_channel(EndpointName, RegInfo, LifeTime, Ver, Peername),
 
-            {ok, Lwm2mState1#lwm2m_state{life_timer = emqx_lwm2m_timer:start_timer(LifeTime, {life_timer, expired})}};
+            NTimer = emqx_lwm2m_timer:start_timer(LifeTime, {life_timer, expired}),
+            {ok, Lwm2mState1#lwm2m_state{life_timer = NTimer}};
         {error, Error} ->
             _ = run_hooks('client.connack', [conninfo(Lwm2mState), not_authorized], undefined),
             {error, Error}
@@ -133,7 +135,7 @@ update_reg_info(NewRegInfo, Lwm2mState=#lwm2m_state{life_timer = LifeTimer, regi
             %% - report the registration info update, but only when objectList is updated.
             case NewRegInfo of
                 #{<<"objectList">> := _} ->
-		    emqx_lwm2m_cm:update_reg_info(Epn, NewRegInfo),
+                    emqx_lwm2m_cm:update_reg_info(Epn, NewRegInfo),
                     send_to_broker(<<"update">>, #{<<"data">> => UpdatedRegInfo}, Lwm2mState);
                 _ -> ok
             end
@@ -186,7 +188,8 @@ deliver(#message{topic = Topic, payload = Payload},
                                   started_at = StartedAt,
                                   endpoint_name = EndpointName}) ->
     IsCacheMode = is_cache_mode(RegInfo, StartedAt),
-    ?LOG(debug, "Get MQTT message from broker, IsCacheModeNow?: ~p, Topic: ~p, Payload: ~p", [IsCacheMode, Topic, Payload]),
+    ?LOG(debug, "Get MQTT message from broker, IsCacheModeNow?: ~p, "
+                "Topic: ~p, Payload: ~p", [IsCacheMode, Topic, Payload]),
     AlternatePath = maps:get(<<"alternatePath">>, RegInfo, <<"/">>),
     deliver_to_coap(AlternatePath, Payload, CoapPid, IsCacheMode, EndpointName),
     Lwm2mState.
@@ -256,7 +259,8 @@ time_now() -> erlang:system_time(millisecond).
 %% Deliver downlink message to coap
 %%--------------------------------------------------------------------
 
-deliver_to_coap(AlternatePath, JsonData, CoapPid, CacheMode, EndpointName) when is_binary(JsonData)->
+deliver_to_coap(AlternatePath, JsonData,
+                CoapPid, CacheMode, EndpointName) when is_binary(JsonData)->
     try
         TermData = emqx_json:decode(JsonData, [return_maps]),
         deliver_to_coap(AlternatePath, TermData, CoapPid, CacheMode, EndpointName)
@@ -285,7 +289,8 @@ deliver_to_coap(AlternatePath, TermData, CoapPid, CacheMode, EndpointName) when
 send_to_broker(EventType, Payload = #{}, Lwm2mState) ->
     do_send_to_broker(EventType, Payload, Lwm2mState).
 
-do_send_to_broker(EventType, #{<<"data">> := Data} = Payload, #lwm2m_state{endpoint_name = EndpointName} = Lwm2mState) ->
+do_send_to_broker(EventType, #{<<"data">> := Data} = Payload,
+                  #lwm2m_state{endpoint_name = EndpointName} = Lwm2mState) ->
     ReqPath = maps:get(<<"reqPath">>, Data, undefined),
     Code = maps:get(<<"code">>, Data, undefined),
     CodeMsg = maps:get(<<"codeMsg">>, Data, undefined),
@@ -327,18 +332,27 @@ auto_observe(AlternatePath, ObjectList, CoapPid, EndpointName) ->
 
 observe_object_list(AlternatePath, ObjectList, CoapPid, EndpointName) ->
     lists:foreach(fun(ObjectPath) ->
-        [ObjId| LastPath] = emqx_lwm2m_cmd_handler:path_list(ObjectPath),
+        [ObjId | LastPath] = emqx_lwm2m_cmd_handler:path_list(ObjectPath),
         case ObjId of
             <<"19">> ->
                 [ObjInsId | _LastPath1] = LastPath,
                 case ObjInsId of
                     <<"0">> ->
-                        observe_object_slowly(AlternatePath, <<"/19/0/0">>, CoapPid, 100, EndpointName);
+                        observe_object_slowly(
+                          AlternatePath, <<"/19/0/0">>,
+                          CoapPid, 100, EndpointName
+                         );
                     _ ->
-                        observe_object_slowly(AlternatePath, ObjectPath, CoapPid, 100, EndpointName)
+                        observe_object_slowly(
+                          AlternatePath, ObjectPath,
+                          CoapPid, 100, EndpointName
+                         )
                 end;
             _ ->
-                observe_object_slowly(AlternatePath, ObjectPath, CoapPid, 100, EndpointName)
+                observe_object_slowly(
+                  AlternatePath, ObjectPath,
+                  CoapPid, 100, EndpointName
+                 )
         end
     end, ObjectList).
 
@@ -392,11 +406,12 @@ get_cached_downlink_messages() ->
 is_cache_mode(RegInfo, StartedAt) ->
     case is_psm(RegInfo) orelse is_qmode(RegInfo) of
         true ->
-            QModeTimeWind = proplists:get_value(qmode_time_window, lwm2m_coap_responder:options(), 22),
-            Now = time_now(),
-            if (Now - StartedAt) >= QModeTimeWind -> true;
-                true -> false
-            end;
+            QModeTimeWind = proplists:get_value(
+                              qmode_time_window,
+                              lwm2m_coap_responder:options(),
+                              22
+                             ),
+            (time_now() - StartedAt) >= QModeTimeWind;
         false -> false
     end.
 

apps/emqx_stomp/src/emqx_stomp_protocol.erl

@@ -108,6 +108,8 @@
                             , init/2
                             ]}).
 
+-elvis([{elvis_style, dont_repeat_yourself, disable}]).
+
 -type(pstate() :: #pstate{}).
 
 %% @doc Init protocol
@@ -132,8 +134,7 @@ init(ConnInfo = #{peername := {PeerHost, _Port},
 
     AllowAnonymous = get_value(allow_anonymous, Opts, false),
     DefaultUser = get_value(default_user, Opts),
-
-	#pstate{
+    #pstate{
        conninfo = NConnInfo,
        clientinfo = ClientInfo,
        heartfun = HeartFun,
@@ -165,7 +166,7 @@ default_conninfo(ConnInfo) ->
 info(State) ->
     maps:from_list(info(?INFO_KEYS, State)).
 
--spec info(list(atom())|atom(), pstate()) -> term().
+-spec info(list(atom()) | atom(), pstate()) -> term().
 info(Keys, State) when is_list(Keys) ->
     [{Key, info(Key, State)} || Key <- Keys];
 info(conninfo, #pstate{conninfo = ConnInfo}) ->
@@ -288,7 +289,12 @@ received(#stomp_frame{command = <<"CONNECT">>}, State = #pstate{connected = true
 received(Frame = #stomp_frame{command = <<"SEND">>, headers = Headers}, State) ->
     case header(<<"transaction">>, Headers) of
         undefined     -> {ok, handle_recv_send_frame(Frame, State)};
-        TransactionId -> add_action(TransactionId, {fun ?MODULE:handle_recv_send_frame/2, [Frame]}, receipt_id(Headers), State)
+        TransactionId ->
+            add_action(TransactionId,
+                       {fun ?MODULE:handle_recv_send_frame/2, [Frame]},
+                       receipt_id(Headers),
+                       State
+                      )
     end;
 
 received(#stomp_frame{command = <<"SUBSCRIBE">>, headers = Headers},
@@ -346,7 +352,11 @@ received(#stomp_frame{command = <<"UNSUBSCRIBE">>, headers = Headers},
 received(Frame = #stomp_frame{command = <<"ACK">>, headers = Headers}, State) ->
     case header(<<"transaction">>, Headers) of
         undefined     -> {ok, handle_recv_ack_frame(Frame, State)};
-        TransactionId -> add_action(TransactionId, {fun ?MODULE:handle_recv_ack_frame/2, [Frame]}, receipt_id(Headers), State)
+        TransactionId ->
+            add_action(TransactionId,
+                       {fun ?MODULE:handle_recv_ack_frame/2, [Frame]},
+                       receipt_id(Headers),
+                       State)
     end;
 
 %% NACK
@@ -357,7 +367,11 @@ received(Frame = #stomp_frame{command = <<"ACK">>, headers = Headers}, State) ->
 received(Frame = #stomp_frame{command = <<"NACK">>, headers = Headers}, State) ->
     case header(<<"transaction">>, Headers) of
         undefined     -> {ok, handle_recv_nack_frame(Frame, State)};
-        TransactionId -> add_action(TransactionId, {fun ?MODULE:handle_recv_nack_frame/2, [Frame]}, receipt_id(Headers), State)
+        TransactionId ->
+            add_action(TransactionId,
+                       {fun ?MODULE:handle_recv_nack_frame/2, [Frame]},
+                       receipt_id(Headers),
+                       State)
     end;
 
 %% BEGIN
@@ -516,9 +530,9 @@ negotiate_version(Accepts) ->
 
 negotiate_version(Ver, []) ->
     {error, <<"Supported protocol versions < ", Ver/binary>>};
-negotiate_version(Ver, [AcceptVer|_]) when Ver >= AcceptVer ->
+negotiate_version(Ver, [AcceptVer | _]) when Ver >= AcceptVer ->
     {ok, AcceptVer};
-negotiate_version(Ver, [_|T]) ->
+negotiate_version(Ver, [_ | T]) ->
     negotiate_version(Ver, T).
 
 check_login(Login, _, AllowAnonymous, _)
@@ -537,7 +551,7 @@ check_login(Login, Passcode, _, DefaultUser) ->
 add_action(Id, Action, ReceiptId, State = #pstate{transaction = Trans}) ->
     case maps:get(Id, Trans, undefined) of
         {Ts, Actions} ->
-            NTrans = Trans#{Id => {Ts, [Action|Actions]}},
+            NTrans = Trans#{Id => {Ts, [Action | Actions]}},
             {ok, State#pstate{transaction = NTrans}};
         _ ->
             send(error_frame(ReceiptId, ["Transaction ", Id, " not found"]), State)
@@ -713,7 +727,7 @@ find_sub_by_id(Id, Subs) ->
             end, Subs),
     case maps:to_list(Found) of
         [] -> undefined;
-        [Sub|_] -> Sub
+        [Sub | _] -> Sub
     end.
 
 is_acl_enabled(_) ->