From dd92d492ee32a2f978a5370677f6793689497018 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 25 Jun 2013 14:30:08 -0500
Subject: [PATCH] packer/plugin: No need for a panic when plugins error

---
 packer/plugin/plugin.go | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/packer/plugin/plugin.go b/packer/plugin/plugin.go
index 72629359c..137b691b2 100644
--- a/packer/plugin/plugin.go
+++ b/packer/plugin/plugin.go
@@ -115,7 +115,8 @@ func ServeBuilder(builder packer.Builder) {
 
 	swallowInterrupts()
 	if err := serve(server); err != nil {
-		log.Panic(err)
+		log.Printf("ERROR: %s", err)
+		os.Exit(1)
 	}
 }
 
@@ -128,7 +129,8 @@ func ServeCommand(command packer.Command) {
 
 	swallowInterrupts()
 	if err := serve(server); err != nil {
-		log.Panic(err)
+		log.Printf("ERROR: %s", err)
+		os.Exit(1)
 	}
 }
 
@@ -141,7 +143,8 @@ func ServeHook(hook packer.Hook) {
 
 	swallowInterrupts()
 	if err := serve(server); err != nil {
-		log.Panic(err)
+		log.Printf("ERROR: %s", err)
+		os.Exit(1)
 	}
 }
 
@@ -154,7 +157,8 @@ func ServePostProcessor(p packer.PostProcessor) {
 
 	swallowInterrupts()
 	if err := serve(server); err != nil {
-		log.Panic(err)
+		log.Printf("ERROR: %s", err)
+		os.Exit(1)
 	}
 }
 
@@ -167,6 +171,7 @@ func ServeProvisioner(p packer.Provisioner) {
 
 	swallowInterrupts()
 	if err := serve(server); err != nil {
-		log.Panic(err)
+		log.Printf("ERROR: %s", err)
+		os.Exit(1)
 	}
 }