From a586f1ca6a7d94e90210ea7a88832a2e5c74cf9b Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Thu, 13 Jul 2017 12:44:50 -0700
Subject: test: Make 'set-ref' only update images which have new versions

-out images are saved when they differ from the reference, this allows
only those new images to be updated.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 test/Makefile.am | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/test/Makefile.am b/test/Makefile.am
index 00819fe..b7fe5ca 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -44,6 +44,8 @@ clean-local:
 set-ref: test-suite.log
 	for ref in $(REFPNG); do \
 		out=`echo $$ref | sed 's/-ref.png/-out.png/'`; \
-		echo cp $$out $$ref; \
-		cp $$out $$ref; \
+		if [ -f $$out ]; then \
+			echo cp $$out $$ref; \
+			cp $$out $$ref; \
+		fi; \
 	done
-- 
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