Programatically filling

[Artur Szostak]

Dear Jenkins community,

Does anyone know if it is possible or how to programatically build and fill the groovy filter expression in the "Restrict matrix execution to a subset" field for the plugin:
https://wiki.jenkins-ci.org/display/JENKINS/Matrix+Combinations+Plugin
I am trying to trigger a matrix job from an upstream matrix job, but only for a select set of combinations that are derived from environment variables of my upstream job.

I tried building up the filter expression in the shell script, writing it to a property file and then using "Parameters from properties file" to pass those to the triggered job. But that does not work because it appears that using properties from file forces them to all be interpreted as plain strings.

Kind regards.

Artur