Is ROOTFS_POSTPROCESS_COMMAND to update debian /boot available?

[Jerry]

I saw this very interesting article but it seems that it’s dedicated to Yocto Project

Updating Raspberry Pi boot firmware files using Yocto Project and Mender

Introduction The Raspberry Pi family of boards are undeniably very popular, both for hobbyists and in professional settings. For this reason this tutorial was created to look at one of the limitations of the Raspberry Pi family boards and how to work around it. In the context of supporting robust operating system level software updates, Raspberry Pi boards are actually very complicated to work with. This primarily relates to the fact that the Raspberry Pi has a set of firmware files that it ne…

Is there an official way to update some /boot files during an update with “Debian family” images ?
Thanks

[kacf]

I think you can use the hook mechanism to modify the contents before the image is generated.