Allow distinction between console and file logging levels

Move from a single lager_level configuration option to
lager_console_level and lager_file_level in order to be able to
control these independently. The default level for the console output
is notice to minimize the output display during a run. The default
level for the file output is info in order to capture all of the
logging that previously has been output to the console.

src/riak_test_escript.erl

@@ -146,7 +146,7 @@ add_deps(Path) ->
 
 test_setup(ParsedArgs) ->
     %% File output
-    OutDir = proplists:get_value(outdir, ParsedArgs),
+    OutDir = proplists:get_value(outdir, ParsedArgs, "log"),
     ensure_dir(OutDir),
 
     lager_setup(OutDir),
@@ -272,18 +272,17 @@ ensure_dir(undefined) ->
 ensure_dir(Dir) ->
     filelib:ensure_dir(Dir).
 
-lager_setup(undefined) ->
-    set_lager_env(rt_config:get(lager_level, notice)),
-    lager:start();
-lager_setup(_) ->
-    set_lager_env(notice),
+lager_setup(OutputDir) ->
+    set_lager_env(OutputDir,
+                  rt_config:get(lager_console_level, notice),
+                  rt_config:get(lager_file_level, info)),
     lager:start().
 
-set_lager_env(LagerLevel) ->
+set_lager_env(OutputDir, ConsoleLevel, FileLevel) ->
     application:load(lager),
-    HandlerConfig = [{lager_console_backend, LagerLevel},
-                     {lager_file_backend, [{file, "log/test.log"},
-                                           {level, LagerLevel}]}],
+    HandlerConfig = [{lager_console_backend, ConsoleLevel},
+                     {lager_file_backend, [{file, filename:join(OutputDir, "test.log")},
+                                           {level, FileLevel}]}],
     application:set_env(lager, handlers, HandlerConfig).
 
 %% maybe_teardown(false, TestResults, Coverage, Verbose) ->