[PATCH 1/3] test: Make sure to update mbuto repository

[David Gibson <david@gibson.dropbear.id.au>]

We download and use mbuto to build trivial boot images for our VM tests.
However, if mbuto is already cloned, we won't update it to the current
version.  Add some make logic to ensure that we do this.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 test/Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/test/Makefile b/test/Makefile
index 7b00bef4..711c61c1 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -67,13 +67,19 @@ CFLAGS = -Wall -Werror -Wextra -pedantic -std=c99
 
 assets: $(ASSETS)
 
+.PHONY: pull-%
+pull-%: %
+	git -C $* pull
+
 mbuto:
 	git clone git://mbuto.sh/mbuto
 
+mbuto/mbuto: pull-mbuto
+
 guest-key guest-key.pub:
 	ssh-keygen -f guest-key -N ''
 
-mbuto.img: passt.mbuto mbuto guest-key.pub $(TESTDATA_ASSETS)
+mbuto.img: passt.mbuto mbuto/mbuto guest-key.pub $(TESTDATA_ASSETS)
 	./mbuto/mbuto -p ./$< -c lz4 -f $@
 
 mbuto.mem.img: passt.mem.mbuto mbuto ../passt.avx2
-- 
@@ -67,13 +67,19 @@ CFLAGS = -Wall -Werror -Wextra -pedantic -std=c99
 
 assets: $(ASSETS)
 
+.PHONY: pull-%
+pull-%: %
+	git -C $* pull
+
 mbuto:
 	git clone git://mbuto.sh/mbuto
 
+mbuto/mbuto: pull-mbuto
+
 guest-key guest-key.pub:
 	ssh-keygen -f guest-key -N ''
 
-mbuto.img: passt.mbuto mbuto guest-key.pub $(TESTDATA_ASSETS)
+mbuto.img: passt.mbuto mbuto/mbuto guest-key.pub $(TESTDATA_ASSETS)
 	./mbuto/mbuto -p ./$< -c lz4 -f $@
 
 mbuto.mem.img: passt.mem.mbuto mbuto ../passt.avx2
-- 
2.44.0