How to use `RAUC_SLOT_rootfs[rename]` ?

[leon-anavi]

Hi,

While working on the RAUC integration for STM32MP157F-DK2 and other STM32MP embedded Linux devices, I had to set IMAGE_MACHINE_SUFFIX="-${DISTRO}-stm32mp15-disco" in the RAUC bundle.

Now I am trying to use RAUC_SLOT_rootfs[rename] instead but I am running into a behavior that looks like a bug in class classes-recipe/bundle.bbclass from layer meta-rauc. In the recipe I have set:

RAUC_SLOT_rootfs[rename] = "st-image-core-${DISTRO}-${MACHINE}.rootfs.ext4"

The result is the following note and error:

NOTE: adding image to bundle dir: 'st-image-core-openstlinux-weston-stm32mp15-disco.rootfs.ext4'
ERROR: Failed to find source st-image-core-stm32mp15-disco.rootfs.ext4

In bundle.bbclass variable imgname is used to print the NOTE and the value matches RAUC_SLOT_rootfs[rename]. But after that for the ERROR variable imgsource is used. Variable imgsource has a different value from RAUC_SLOT_rootfs[rename] and as a result it points to a file that doesn't exist in the particular case.

I am testing on Scarthgap but this particular code in the bundle.bbclass looks the same in master.

Am I missing something or doing anything wrong with RAUC_SLOT_rootfs[rename] ?