Write log also to a file.

binary/log.go

@@ -1,19 +1,17 @@
 package binary
 
 import (
-	"os"
-
 	"github.com/tendermint/log15"
+	"github.com/tendermint/tendermint/logger"
 )
 
-var log = log15.New("module", "binary")
+var log = logger.New("module", "binary")
 
 func init() {
 	log.SetHandler(
 		log15.LvlFilterHandler(
 			log15.LvlWarn,
-			//log15.LvlDebug,
-			log15.StreamHandler(os.Stderr, log15.LogfmtFormat()),
+			logger.RootHandler(),
 		),
 	)
 }