images imagebuilder: Allow to add sanitized extra name

For final output image names allow user to add an
extra string (which is sanitized).  This is particularly
useful with ImageBuilder where you may generate multiple
images from the same base and for the same board,
with different package selections and additional files
(via FILES=).

Signed-off-by: Daniel Dickinson <openwrt@daniel.thecshore.com>

SVN-Revision: 48083

include/image.mk

@@ -31,8 +31,9 @@ $(shell echo $(call tolower,$(1)) | sed 's/_/-/g')
 endef
 
 DIST_SANITIZED:=$(call sanitize,$(VERSION_DIST))
+EXTRA_NAME_SANITIZED=$(call sanitize,$(EXTRA_IMAGE_NAME))
 
-IMG_PREFIX:=$(DIST_SANITIZED)-$(if $(CONFIG_VERSION_FILENAMES),$(VERSION_NUMBER)-)$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))
+IMG_PREFIX:=$(DIST_SANITIZED)-$(if $(CONFIG_VERSION_FILENAMES),$(VERSION_NUMBER)-)$(if $(EXTRA_NAME_SANITIZED),$(EXTRA_NAME_SANITIZED)-)$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))
 
 MKFS_DEVTABLE_OPT := -D $(INCLUDE_DIR)/device_table.txt
 

target/imagebuilder/files/Makefile

@@ -43,7 +43,7 @@ Building images:
 	make image PACKAGES="<pkg1> [<pkg2> [<pkg3> ...]]" # include extra packages
 	make image FILES="<path>" # include extra files from <path>
 	make image BIN_DIR="<path>" # alternative output directory for the images
-
+	make image EXTRA_IMAGE_NAME="<string>" # Add this to the output image filename (sanitized)
 endef
 $(eval $(call shexport,Helptext))
 
@@ -174,7 +174,7 @@ package_postinst: FORCE
 build_image: FORCE
 	@echo
 	@echo Building images...
-	$(NO_TRACE_MAKE) -C target/linux/$(BOARD)/image install TARGET_BUILD=1 IB=1 \
+	$(NO_TRACE_MAKE) -C target/linux/$(BOARD)/image install TARGET_BUILD=1 IB=1 EXTRA_IMAGE_NAME="$(EXTRA_IMAGE_NAME)" \
 		$(if $(USER_PROFILE),PROFILE="$(USER_PROFILE)")
 
 clean: