From bbb35d72094ddb912c1ff5a660bf9fe36aee34b9 Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Wed, 7 Aug 2019 10:52:19 +0100
Subject: [PATCH] Transform Listen statement to new format if needed

---
 cmd/yggdrasil/main.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cmd/yggdrasil/main.go b/cmd/yggdrasil/main.go
index 129b01d..ee8ebe8 100644
--- a/cmd/yggdrasil/main.go
+++ b/cmd/yggdrasil/main.go
@@ -74,6 +74,12 @@ func readConfig(useconf *bool, useconffile *string, normaliseconf *bool) *config
 	if err := hjson.Unmarshal(conf, &dat); err != nil {
 		panic(err)
 	}
+	// Check for fields that have changed type recently, e.g. the Listen config
+	// option is now a []string rather than a string
+	if listen, ok := dat["Listen"].(string); ok {
+		dat["Listen"] = []string{listen}
+	}
+	// Sanitise the config
 	confJson, err := json.Marshal(dat)
 	if err != nil {
 		panic(err)