From 7cb31714ad8868e7e97ec4714bc1e973c6537a5e Mon Sep 17 00:00:00 2001
From: Megan Marsh <megan@hashicorp.com>
Date: Thu, 7 Mar 2019 09:37:31 -0800
Subject: [PATCH] Allow user variables to be interpreted within the variables
 section of the template.

---
 packer/core.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packer/core.go b/packer/core.go
index d88e21e5c..cd6c6ae34 100644
--- a/packer/core.go
+++ b/packer/core.go
@@ -303,7 +303,7 @@ func (c *Core) init() error {
 	// Go through the variables and interpolate the environment variables
 	ctx := c.Context()
 	ctx.EnableEnv = true
-	ctx.UserVariables = nil
+	ctx.UserVariables = make(map[string]string)
 	for k, v := range c.Template.Variables {
 		// Ignore variables that are required
 		if v.Required {
@@ -324,6 +324,7 @@ func (c *Core) init() error {
 		}
 
 		c.variables[k] = def
+		ctx.UserVariables = c.variables
 	}
 
 	for _, v := range c.Template.SensitiveVariables {