only build cbutils if required

it's sometimes done unconditionally. this change
ensures that it is not repeated needlessly.

i observed otherwise that cbfstool would be
re-built from time to time, even if it was built.

Signed-off-by: Leah Rowe <leah@libreboot.org>

3 files changed, 8 insertions, 3 deletions

diff --git a/script/build/fw/coreboot b/script/build/fw/coreboot
index bf7943ac..4cdf64ff 100755
--- a/script/build/fw/coreboot
+++ b/script/build/fw/coreboot
@@ -132,7 +132,8 @@ prepare_target()
 	cbfstool="cbutils/${tree}/cbfstool"
 	cbrom="${cbdir}/build/coreboot.rom"
 
-	x_ ./update project trees -b coreboot utils ${tree}
+	[ -f "${cbfstool}" ] || \
+		x_ ./update project trees -b coreboot utils ${tree}
 
 	build_dependency_seabios
 
diff --git a/script/update/vendor/download b/script/update/vendor/download
index 2d90b9b0..6c83b0ca 100755
--- a/script/update/vendor/download
+++ b/script/update/vendor/download
@@ -50,7 +50,9 @@ build_dependencies()
 		x_ ./update project trees -b uefitool
 	[ -f "${kbc1126_ec_dump}" ] || \
 		x_ make -C "${cbdir}/util/kbc1126"
-	x_ ./update project trees -b coreboot utils default
+	if [ ! -f "${cbfstool}" ] || [ ! -f "${ifdtool}" ]; then
+		x_ ./update project trees -b coreboot utils default
+	fi
 }
 
 download_vendorfiles()
diff --git a/script/update/vendor/inject b/script/update/vendor/inject
index 3340a723..f4caf89e 100755
--- a/script/update/vendor/inject
+++ b/script/update/vendor/inject
@@ -88,7 +88,9 @@ detect_board()
 build_dependencies()
 {
 	[ -d "${cbdir}" ] || x_ ./update project trees -f coreboot default
-	x_ ./update project trees -b coreboot utils default
+	if [ ! -f "${cbfstool}" ] || [ ! -f "${ifdtool}" ]; then
+		x_ ./update project trees -b coreboot utils default
+	fi
 	x_ ./update vendor download ${board}
 }