From 421fe128c3626ec102147e1df68d09207f202d6c Mon Sep 17 00:00:00 2001
From: Barak Michener <me@barakmich.com>
Date: Thu, 11 Dec 2014 13:09:50 -0500
Subject: [PATCH] Return Unknown instead of NotExist Unless the data dir truly
 does not exist.

---
 wal/util.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/wal/util.go b/wal/util.go
index 8d13f2137..0e940305b 100644
--- a/wal/util.go
+++ b/wal/util.go
@@ -37,7 +37,7 @@ const (
 
 func DetectVersion(dirpath string) WalVersion {
 	names, err := fileutil.ReadDir(dirpath)
-	if err != nil || len(names) == 0 {
+	if err != nil {
 		return WALNotExist
 	}
 	nameSet := types.NewUnsafeSet(names...)
@@ -46,7 +46,6 @@ func DetectVersion(dirpath string) WalVersion {
 		if Exist(path.Join(dirpath, "wal")) {
 			return WALv0_5
 		}
-		return WALNotExist
 	}
 	if nameSet.ContainsAll([]string{"snapshot", "conf", "log"}) {
 		return WALv0_4