BuildSystem: Make root partition UUID fixed

This allows specifying root as UUID which makes booting nicer experience
on real hardware

script/config.sh

@@ -33,3 +33,5 @@ if [[ -z $BANAN_BOOTLOADER ]]; then
 fi
 
 export BANAN_CMAKE=$BANAN_TOOLCHAIN_PREFIX/bin/cmake
+
+export BANAN_ROOT_PART_UUID='9C87D2AF-566A-4517-971A-57BA86EEA88D'

script/image-create.sh

@@ -46,6 +46,15 @@ else
 		mkpart root ext2 2M 100%
 fi
 
+fdisk "$BANAN_DISK_IMAGE_PATH" >/dev/null << EOF
+x
+u
+2
+$BANAN_ROOT_PART_UUID
+r
+w
+EOF
+
 # create loop device
 LOOP_DEV=$(sudo losetup --show  -fP "$BANAN_DISK_IMAGE_PATH" || exit 1 )
 PARTITION1=${LOOP_DEV}p1

script/install-bootloader.sh

@@ -44,7 +44,7 @@ install_grub_legacy() {
 		--boot-directory="$MOUNT_DIR/boot"	\
 		$LOOP_DEV
 	sudo mkdir -p "$MOUNT_DIR/boot/grub"
-	sudo cp "$BANAN_TOOLCHAIN_DIR/grub-legacy-boot.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
+	sed "s/<ROOT>/UUID=$BANAN_ROOT_PART_UUID/" "$BANAN_TOOLCHAIN_DIR/grub-legacy-boot.cfg" | sudo tee "$MOUNT_DIR/boot/grub/grub.cfg" >/dev/null
 	sudo umount "$MOUNT_DIR"
 }
 
@@ -57,7 +57,7 @@ install_grub_uefi() {
 
 	sudo mount $PARTITION2 "$MOUNT_DIR"
 	sudo mkdir -p "$MOUNT_DIR/boot/grub"
-	sudo cp "$BANAN_TOOLCHAIN_DIR/grub-uefi.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
+	sed "s/<ROOT>/UUID=$BANAN_ROOT_PART_UUID/" "$BANAN_TOOLCHAIN_DIR/grub-uefi.cfg" | sudo tee "$MOUNT_DIR/boot/grub/grub.cfg" >/dev/null
 	sudo umount "$MOUNT_DIR"
 }