ENH run all of xmobar in rio

bin/xmobar.hs

@@ -50,13 +50,14 @@ parse ["--test"] = void $ withCache . evalConfig =<< connectDBus
 parse _ = usage
 
 run :: IO ()
-run = do
+run = withCache $ do
   db <- connectDBus
-  c <- withCache $ evalConfig db
+  c <- evalConfig db
   disconnectDBus db
-  -- this is needed to see any printed messages
-  hFlush stdout
-  xmobar c
+  liftIO $ do
+    -- this is needed to see any printed messages
+    hFlush stdout
+    xmobar c
 
 evalConfig :: DBusState -> FIO Config
 evalConfig db = do