Calculate value from within dkms.conf

[ev-mp]

Hello all,
I'm trying to build debian dkms for several in-tree modules that require patches.
I'm looking to a way to do the following in DKMS.conf :

SELECTED_KERNEL=$kernelver | cut -d- -f1

In order to use it later as

BUILT_MODULE_LOCATION[0]="$SELECTED_KERNEL/drivers/media/..."

So for instance with $kernelver=4.4.0-112_generic I would get SELECTED_KERNEL=4.4.0
I tried to change the DKMS.conf to bash script by adding '#!/bin/sh' and chmoding accordingly, but still, the new variable is not being calculated.

Any comments will be helpful

[ev-mp]

One more thing, according to DKMS manual the file DKMS.conf is a shell-script:

Note that the dkms.conf is really only a shell-script of variable definitions which are then sourced in by the dkms executable

So at least in theory there are provisions for this trick to work

[superm1]

SELECTED_KERNEL=$kernelver | cut -d- -f1

I'd think you want it something like this:

SELECTED_KERNEL=$(echo $kernelver | cut -d- -f1)

[ev-mp]

Thanks for suggestion, I was interrupted to another task, but will return, check and update.

[ev-mp]

Hello, I want to update and confirm that the above syntax works!
thanks for the great advice - it just saved me a copy-paste of three sections