image: introduce 'append-image-stage' build command

Similar to 'append-image' this new command appends an existing binary.
'append-image-stage' also makes a copy of that binary and keeps it in
$(STAGING_DIR_IMAGE). When called from within the ImageBuilder, this
copy is used instead of expecting the binary to be present.
This is useful for artifacts which include the initramfs/recovery image
which is usually not included in the ImageBuilder.

Signed-off-by: Daniel Golle <[email protected]>

include/image-commands.mk

@@ -31,6 +31,18 @@ define Build/append-image
 	dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
 endef
 
+ifdef IB
+define Build/append-image-stage
+	dd if=$(STAGING_DIR_IMAGE)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
+endef
+else
+define Build/append-image-stage
+	dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) of=$(STAGING_DIR_IMAGE)/$(DEVICE_IMG_PREFIX)-$(1)
+	dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
+endef
+endif
+
+
 compat_version=$(if $(DEVICE_COMPAT_VERSION),$(DEVICE_COMPAT_VERSION),1.0)
 json_quote=$(subst ','\'',$(subst ",\",$(1)))
 #")')