From b2cde1d0d34d799faff9828d20216e18b77a304d Mon Sep 17 00:00:00 2001
From: Herb Kuta <herb.kuta@lge.com>
Date: Mon, 29 Apr 2019 18:40:14 -0700
Subject: [PATCH] DRAFT ros_component.bbclass: Use ??= when assigning ROS_BPN,
 ROS_SPN, ROS_SP

---
 classes/ros_component.bbclass | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/classes/ros_component.bbclass b/classes/ros_component.bbclass
index 51d9c28..e207d9f 100644
--- a/classes/ros_component.bbclass
+++ b/classes/ros_component.bbclass
@@ -6,9 +6,9 @@ export ROS_DISTRO
 export ROS_VERSION
 export ROS_PYTHON_VERSION
 
-ROS_BPN = "${@d.getVar('BPN', True).replace('-', '_')}"
-ROS_SPN ?= "${ROS_BPN}"
-ROS_SP = "${ROS_SPN}-${PV}"
+ROS_BPN ??= "${@d.getVar('BPN', True).replace('-', '_')}"
+ROS_SPN ??= "${ROS_BPN}"
+ROS_SP ??= "${ROS_SPN}-${PV}"
 
 # Ensure that PYTHON_PN is always set. (ROS_PYTHON_VERSION is set in generated-ros-distro.inc, ie, it will never be unset when
 # we get here.)