build/boot/roms: don't create empty bin/ directory

also: only return zero status if rom images were succesfully
built, and print a list of each rom image directory based on
what was actually compiled, rather than just saying that the
rom images are stored under bin/

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

script/build/boot/roms

@@ -35,6 +35,7 @@ read projectname < projectname
 opts=""
 boards=
 firstoption=""
+targets=""
 
 main()
 {
@@ -68,14 +69,19 @@ main()
 	if [ "${firstoption}" = "all" ]; then
 		for target in $(./build command options config/coreboot); do
 			buildrom "${target}" || err "build/roms (1): error"
+			[ -d "bin/${target}" ] && targets="${target} ${targets}"
 		done
 	else
 		for board in ${boards}; do
 			buildrom "${board}" || err "build/roms (2): error"
+			[ -d "bin/${board}" ] && targets="${board} ${targets}"
 		done
 	fi
-
+	[ -z "${targets}" ] && err "No ROM images were compiled."
-	printf "\n\nDone! Your ROMs are in bin/\n\n"
+	printf "\n\nYour ROM images are available in these directories:\n"
+	for x in ${targets}; do
+		printf "* bin/%s\n" "${x}"
+	done
 }
 
 usage()

script/build/boot/roms_helper

@@ -186,8 +186,6 @@ build_dependencies()
 		./handle make file -b ${memtest_bin%/*} || \
 		    err "cannot build memtest86+"
 
-	[ -d "${romdir}/" ] || mkdir -p "${romdir}/" || \
-	    err "cannot create rom directory: \"${romdir}\""
 	rm -f "${romdir}"/* || err "cannot: rm -f \"${romdir}\"/*"
 
 	build_dependency_grub
@@ -529,6 +527,9 @@ moverom() {
 
 	printf "\nCreating new ROM image: %s\n" "${newrompath}"
 
+	[ -d "${newrompath%/*}" ] || mkdir -p "${newrompath%/*}/" || \
+	    err "moverom: cannot create rom directory: \"${newrompath%/*}\""
+
 	[ "${blobs_required}" = "n" ] && \
 		newrompath="${newrompath%.rom}_noblobs.rom"