From b90300ba2dbbba7755c2734f3a764df1b35885f4 Mon Sep 17 00:00:00 2001
From: Antoni Sawicki <tenox@google.com>
Date: Mon, 27 Apr 2020 01:05:02 -0700
Subject: [PATCH] allow env var PORT to override listen address flag for Cloud
 RUN, etc

---
 wrp.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/wrp.go b/wrp.go
index a68370b..2428658 100644
--- a/wrp.go
+++ b/wrp.go
@@ -401,6 +401,9 @@ func main() {
 	} else {
 		headless = true
 	}
+	if len(os.Getenv("PORT")) > 0 {
+		addr = ":" + os.Getenv(("PORT"))
+	}
 	n, err := fmt.Sscanf(fgeom, "%dx%dx%d", &defgeom.w, &defgeom.h, &defgeom.c)
 	if err != nil || n != 3 {
 		log.Fatalf("Unable to parse -g geometry flag / %s", err)