From ff529ffa40e840b259f6fcb276f17998bcf1f0ed Mon Sep 17 00:00:00 2001
From: Sean Chittenden <sean@chittenden.org>
Date: Thu, 31 Mar 2016 15:02:58 -0700
Subject: [PATCH] Guard against a node name containing pure whitespace

---
 command/agent/command.go | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/command/agent/command.go b/command/agent/command.go
index 16025c9d5d..dfd24ef57e 100644
--- a/command/agent/command.go
+++ b/command/agent/command.go
@@ -167,14 +167,13 @@ func (c *Command) readConfig() *Config {
 			c.Ui.Error(fmt.Sprintf("Error determining node name: %s", err))
 			return nil
 		}
-
-		hostname = strings.TrimSpace(hostname)
-		if hostname == "" {
-			c.Ui.Error("Node name can not be empty")
-			return nil
-		}
 		config.NodeName = hostname
 	}
+	hostname = strings.TrimSpace(hostname)
+	if hostname == "" {
+		c.Ui.Error("Node name can not be empty")
+		return nil
+	}
 
 	// Ensure we have a data directory
 	if config.DataDir == "" && !dev {