[Qemu-devel] [PULL 12/17] docker: report hint when docker.py check fails

[Alex Bennée]

When a check fails we currently just report why we failed. This is not
totally helpful to people who want to boot-strap a new image. Report a
hint as to why it failed.

Signed-off-by: Alex Bennée <address@hidden>
Suggested-by: Fam Zheng <address@hidden>

diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index 05afeb64a7..1aaa795743 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -73,7 +73,8 @@ docker-binfmt-image-debian-%: 
$(DOCKER_FILES_DIR)/debian-bootstrap.docker
                        $(if $(EXECUTABLE),--include-executable=$(EXECUTABLE)), 
\
                        "BUILD","binfmt debian-$* (debootstrapped)"),           
\
                $(call quiet-command,                                           
\
-                       $(DOCKER_SCRIPT) check --quiet qemu:debian-$* $<,       
\
+                       $(DOCKER_SCRIPT) check --quiet qemu:debian-$* $< ||     
\
+                       { echo "You will need to build $(EXECUTABLE)"; exit 
1;},\
                        "CHECK", "debian-$* exists"))
 
 endif
-- 
2.17.1