From 76c8cfd498e35d9569c6e69403228da9248ed7ff Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Mon, 18 May 2015 15:13:01 -0700
Subject: [PATCH] common: don't scrub ""

If the access_key or secret_key were loaded from
somewhere other than the packer file then
ScrubConfig can get called to scrub "" and "".

This results in very long output:

<Filtered><<Filtered>F<Filtered>i...

Don't do that.
---
 common/config.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/config.go b/common/config.go
index 72b3bdd27..d821faf35 100644
--- a/common/config.go
+++ b/common/config.go
@@ -18,6 +18,9 @@ import (
 func ScrubConfig(target interface{}, values ...string) string {
 	conf := fmt.Sprintf("Config: %+v", target)
 	for _, value := range values {
+		if value == "" {
+			continue
+		}
 		conf = strings.Replace(conf, value, "<Filtered>", -1)
 	}
 	return conf