Add ARG in Dockerfile

build-arg requires a ARG define in Dockerfile.

Change-Id: Id895449f1d9d73ab70bd9958b8cc8cf2d92c5a3c
Signed-off-by: Julien <zhang.jun3g@zte.com.cn>

diff --git a/docker/Dockerfile b/docker/Dockerfile
index 8703858..6026db1 100644 (file)
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,6 +1,7 @@
 FROM centos:7
 LABEL daisy_image_version=1.0
-ENV BRANCH=$BRANCH
+ARG BRANCH
+ENV BRANCH=${BRANCH:-master}
 RUN yum -y update
 RUN yum -y install centos-release-openstack-newton
 RUN yum -y install \