From 5c02bd3d26dfed96d8afe746d0af2adbdc593f44 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Fri, 20 Sep 2013 11:26:56 -0700
Subject: [PATCH] packer: better error message for bad provisioner only/except

---
 packer/template.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packer/template.go b/packer/template.go
index b398b54cc..547348d91 100644
--- a/packer/template.go
+++ b/packer/template.go
@@ -273,7 +273,10 @@ func ParseTemplate(data []byte) (t *Template, err error) {
 
 		// Verify that the only settings are good
 		if errs := raw.TemplateOnlyExcept.Validate(t.Builders); len(errs) > 0 {
-			errors = append(errors, errs...)
+			for _, err := range errs {
+				errors = append(errors,
+					fmt.Errorf("provisioner %d: %s", i+1, err))
+			}
 		}
 
 		raw.RawConfig = v