logger: Rework configuration of logger

Most logger configuration that was possible through
kernel application variables have been moved into a
common 'logger' application environment in kernel.

Now all the configuration possible through the logger
API can be done as sys config.

The handler started by kernel has been renamed to 'default'
instead of logger_std_h.

There is a new logger:setup_handlers/1 function that given an
application name can be used to setup handlers in other applications.

1 files changed, 5 insertions, 9 deletions

diff --git a/lib/kernel/src/kernel.erl b/lib/kernel/src/kernel.erl
index ae982c1741..b0e8c00bbf 100644
--- a/lib/kernel/src/kernel.erl
+++ b/lib/kernel/src/kernel.erl
@@ -30,17 +30,13 @@
 %%% Callback functions for the kernel application.
 %%%-----------------------------------------------------------------
 start(_, []) ->
+    %% Setup the logger and configure the kernel logger environment
+    ok = logger:internal_init_logger(),
     case supervisor:start_link({local, kernel_sup}, kernel, []) of
 	{ok, Pid} ->
             ok = erl_signal_handler:start(),
-            %% add error handler
-            case logger:setup_standard_handler() of
-                ok -> {ok, Pid, []};
-                Error ->
-                    %% Not necessary since the node will crash anyway:
-                    exit(Pid, shutdown),
-                    Error
-            end;
+            ok = logger:add_handlers(kernel),
+            {ok, Pid, []};
 	Error -> Error
     end.
 
@@ -147,7 +143,7 @@ init([]) ->
     case init:get_argument(mode) of
         {ok, [["minimal"]]} ->
             {ok, {SupFlags,
-                  [Code, File, StdError, User, Config, RefC, SafeSup, LoggerSup]}};
+                  [Code, File, StdError, User, LoggerSup, Config, RefC, SafeSup]}};
         _ ->
             Rpc = #{id => rex,
                     start => {rpc, start_link, []},