From 5bec1ac3830bf1c0ed91e94882d2287aaf15764d Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 8 Jul 2014 16:02:01 -0700
Subject: [PATCH] providers/aws: gateway detach is idempotent

---
 builtin/providers/aws/resource_aws_internet_gateway.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/builtin/providers/aws/resource_aws_internet_gateway.go b/builtin/providers/aws/resource_aws_internet_gateway.go
index e26c81da2..276a3577f 100644
--- a/builtin/providers/aws/resource_aws_internet_gateway.go
+++ b/builtin/providers/aws/resource_aws_internet_gateway.go
@@ -181,7 +181,14 @@ func resource_aws_internet_gateway_detach(
 		s.Attributes["vpc_id"])
 	_, err := ec2conn.DetachInternetGateway(s.ID, s.Attributes["vpc_id"])
 	if err != nil {
-		return err
+		ec2err, ok := err.(*ec2.Error)
+		if ok && ec2err.Code == "Gateway.NotAttached" {
+			err = nil
+		}
+
+		if err != nil {
+			return err
+		}
 	}
 
 	delete(s.Attributes, "vpc_id")