From 9004f6dbe19e5119f9526cfa75a5314fc36c1132 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Fri, 17 Jun 2016 22:18:26 -0700
Subject: [PATCH] generate: Don't serialize Spec.Linux as an empty JSON object

The "does the marshaled JSON look like '{}'?" check is a pretty cheap
trick, but it was the easiest way I could think of for "is there
anything useful in here?".

Signed-off-by: W. Trevor King <wking@tremily.us>
---
 generate/generate.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/generate/generate.go b/generate/generate.go
index 9e4705aaf..60d92adcd 100644
--- a/generate/generate.go
+++ b/generate/generate.go
@@ -196,6 +196,16 @@ func (g *Generator) Spec() *rspec.Spec {
 func (g *Generator) Save(w io.Writer, exportOpts ExportOptions) (err error) {
 	var data []byte
 
+	if g.spec.Linux != nil {
+		buf, err := json.Marshal(g.spec.Linux)
+		if err != nil {
+			return err
+		}
+		if string(buf) == "{}" {
+			g.spec.Linux = nil
+		}
+	}
+
 	if exportOpts.Seccomp {
 		data, err = json.MarshalIndent(g.spec.Linux.Seccomp, "", "\t")
 	} else {