templatizing a configuration file

Hi

I want to templatize (we use hiera with yaml backend) a configuration file
that has the following content:

include-and-override=${configDir}/al-runtime.conf
include-and-override=${configDir}/al-ldap.conf
include-and-override=${configDir}/al-cluster.conf
include-and-override=${configDir}/al-jaas.conf
include-and-override=${configDir}/al-internal.conf
include-and-override=${configDir}/al-external.conf

The number of lines and content of the include-and-override directive
changes between systems...

Can it be done?

TIA
Paolo