improve(print): io:format error message without indentation

Avoid squeezing lines to the right.

apps/emqx_coap/src/emqx_coap_server.erl

@@ -55,7 +55,7 @@ start_listener({Proto, ListenOn, Opts}) ->
             io:format("Start coap:~s listener on ~s successfully.~n",
                       [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start coap:~s listener on ~s - ~0p~n!",
+            io:format(standard_error, "Failed to start coap:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason]),
             error(Reason)
     end.
@@ -71,7 +71,7 @@ stop_listener({Proto, ListenOn, _Opts}) ->
         ok -> io:format("Stop coap:~s listener on ~s successfully.~n",
                         [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to stop coap:~s listener on ~s - ~p~n.",
+            io:format(standard_error, "Failed to stop coap:~s listener on ~s: ~0p~n.",
                       [Proto, format(ListenOn), Reason])
     end,
     Ret.

apps/emqx_exproto/src/emqx_exproto.erl

@@ -69,7 +69,7 @@ start_connection_handler_instance({_Proto, _LisType, _ListenOn, Opts}) ->
         {ok, _ClientChannelPid} ->
             {_Proto, _LisType, _ListenOn, [{handler, Name} | LisOpts]};
         {error, Reason} ->
-            io:format(standard_error, "Failed to start ~s's connection handler - ~0p~n!",
+            io:format(standard_error, "Failed to start ~s's connection handler: ~0p~n",
                       [Name, Reason]),
             error(Reason)
     end.
@@ -85,7 +85,7 @@ start_server({Name, Port, SSLOptions}) ->
             io:format("Start ~s gRPC server on ~w successfully.~n",
                       [Name, Port]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start ~s gRPC server on ~w - ~0p~n!",
+            io:format(standard_error, "Failed to start ~s gRPC server on ~w: ~0p~n",
                       [Name, Port, Reason]),
             error({failed_start_server, Reason})
     end.
@@ -101,7 +101,7 @@ start_listener({Proto, LisType, ListenOn, Opts}) ->
             io:format("Start ~s listener on ~s successfully.~n",
                       [Name, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start ~s listener on ~s - ~0p~n!",
+            io:format(standard_error, "Failed to start ~s listener on ~s: ~0p~n",
                       [Name, format(ListenOn), Reason]),
             error(Reason)
     end.
@@ -132,7 +132,7 @@ stop_listener({Proto, LisType, ListenOn, Opts}) ->
             io:format("Stop ~s listener on ~s successfully.~n",
                       [Name, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to stop ~s listener on ~s - ~p~n.",
+            io:format(standard_error, "Failed to stop ~s listener on ~s: ~0p~n",
                       [Name, format(ListenOn), Reason])
     end,
     StopRet.

apps/emqx_lwm2m/src/emqx_lwm2m_coap_server.erl

@@ -47,7 +47,7 @@ start_listener({Proto, ListenOn, Opts}) ->
             io:format("Start lwm2m:~s listener on ~s successfully.~n",
                       [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start lwm2m:~s listener on ~s - ~0p~n!",
+            io:format(standard_error, "Failed to start lwm2m:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason]),
             error(Reason)
     end.
@@ -63,7 +63,7 @@ stop_listener({Proto, ListenOn, _Opts}) ->
         ok -> io:format("Stop lwm2m:~s listener on ~s successfully.~n",
                         [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to stop lwm2m:~s listener on ~s - ~p~n.",
+            io:format(standard_error, "Failed to stop lwm2m:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason])
     end,
     Ret.

apps/emqx_sn/src/emqx_sn_app.erl

@@ -71,7 +71,7 @@ start_listener({Proto, ListenOn, Options}) ->
         {ok, _} -> io:format("Start mqttsn:~s listener on ~s successfully.~n",
                              [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start mqttsn:~s listener on ~s - ~0p~n!",
+            io:format(standard_error, "Failed to start mqttsn:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason]),
             error(Reason)
     end.
@@ -101,7 +101,7 @@ stop_listener({Proto, ListenOn, Opts}) ->
         ok -> io:format("Stop mqttsn:~s listener on ~s successfully.~n",
                         [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to stop mqttsn:~s listener on ~s - ~p~n.",
+            io:format(standard_error, "Failed to stop mqttsn:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason])
     end,
     StopRet.

apps/emqx_stomp/src/emqx_stomp.erl

@@ -73,7 +73,7 @@ start_listener({Proto, ListenOn, Options}) ->
         {ok, _} -> io:format("Start stomp:~s listener on ~s successfully.~n",
                              [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start stomp:~s listener on ~s - ~0p~n!",
+            io:format(standard_error, "Failed to start stomp:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason]),
             error(Reason)
     end.
@@ -102,7 +102,7 @@ stop_listener({Proto, ListenOn, Opts}) ->
         ok -> io:format("Stop stomp:~s listener on ~s successfully.~n",
                         [Proto, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to stop stomp:~s listener on ~s - ~p~n.",
+            io:format(standard_error, "Failed to stop stomp:~s listener on ~s: ~0p~n",
                       [Proto, format(ListenOn), Reason])
     end,
     StopRet.

bin/nodetool

@@ -47,7 +47,7 @@ main(Args) ->
         {true, pong} ->
             ok;
         {false, pong} ->
-            io:format(standard_error, "Failed to connect to node ~p .\n", [TargetNode]),
+            io:format(standard_error, "Failed to connect to node ~p\n", [TargetNode]),
             halt(1);
         {_, pang} ->
             io:format(standard_error, "Node ~p not responding to pings.\n", [TargetNode]),

lib-opensource/emqx_management/src/emqx_mgmt_cli.erl

@@ -157,7 +157,7 @@ cluster(["join", SNode]) ->
         ignore ->
             emqx_ctl:print("Ignore.~n");
         {error, Error} ->
-            emqx_ctl:print("Failed to join the cluster: ~p~n", [Error])
+            emqx_ctl:print("Failed to join the cluster: ~0p~n", [Error])
     end;
 
 cluster(["leave"]) ->
@@ -166,7 +166,7 @@ cluster(["leave"]) ->
             emqx_ctl:print("Leave the cluster successfully.~n"),
             cluster(["status"]);
         {error, Error} ->
-            emqx_ctl:print("Failed to leave the cluster: ~p~n", [Error])
+            emqx_ctl:print("Failed to leave the cluster: ~0p~n", [Error])
     end;
 
 cluster(["force-leave", SNode]) ->
@@ -177,7 +177,7 @@ cluster(["force-leave", SNode]) ->
         ignore ->
             emqx_ctl:print("Ignore.~n");
         {error, Error} ->
-            emqx_ctl:print("Failed to remove the node from cluster: ~p~n", [Error])
+            emqx_ctl:print("Failed to remove the node from cluster: ~0p~n", [Error])
     end;
 
 cluster(["status"]) ->
@@ -536,7 +536,7 @@ listeners(["stop",  Name = "http" ++ _N | _MaybePort]) ->
         ok ->
             emqx_ctl:print("Stop ~s listener successfully.~n", [Name]);
         {error, Error} ->
-            emqx_ctl:print("Failed to stop ~s listener, error:~p~n", [Name, Error])
+            emqx_ctl:print("Failed to stop ~s listener: ~0p~n", [Name, Error])
     end;
 
 listeners(["stop", "mqtt:" ++ _ = Identifier]) ->
@@ -565,7 +565,7 @@ stop_listener(#{listen_on := ListenOn} = Listener, _Input) ->
         ok ->
             emqx_ctl:print("Stop ~s listener on ~s successfully.~n", [ID, ListenOnStr]);
         {error, Reason} ->
-            emqx_ctl:print("Failed to stop ~s listener on ~s - ~p~n.",
+            emqx_ctl:print("Failed to stop ~s listener on ~s: ~0p~n",
                            [ID, ListenOnStr, Reason])
     end.
 

src/emqx_listeners.erl

@@ -109,7 +109,7 @@ start_listener(#{proto := Proto, name := Name, listen_on := ListenOn, opts := Op
         {ok, _} -> io:format("Start ~s listener on ~s successfully.~n",
                              [ID, format(ListenOn)]);
         {error, Reason} ->
-            io:format(standard_error, "Failed to start mqtt listener ~s on ~s - ~0p~n!",
+            io:format(standard_error, "Failed to start mqtt listener ~s on ~s: ~0p~n",
                       [ID, format(ListenOn), Reason]),
             error(Reason)
     end.