roundup feature for Wic partitions?

[crawford.benjamin15@gmail.com]

Hi,

I am trying to configure an image to conform to the VHD size alignment
requirements of Azure. Azure requires that the filesize of a VHD be a
multiple of 1 MiB. The '--align' option works to align the _start_ of a
partition to a particular multiple, but I need the _end_ to be aligned.
As a workaround, I tried:

part /fake --fixed-size=0 --no-table --align=1024

I figured this would create a zero-sized partition which would be
appropriately aligned at the end of the image, but wic complains that
zero-sized partitions are not allowed.

Is there a way to achieve this, or extend the capabilities of wic to
handle this use case?

Best,
Ben