How to pick up options from another ("master") port, but don't show "config" dialog at all and have defaults in case of absence of "master" port options file?

[Lev Serebryakov]

Hello, Ports.

  I want some "dependant" ports to pick-up options set in "main" port, but
 never ever show "config" dialog/UI. I've tried to set
 OPTIONS_NAME=cat_port, and it set OPTIONS_FILE_SET and OPTIONS_FILE_UNSET
 variables, but not PORT_OPTIONS variable, as this exact ("dependant") port
 doesn't have OPTIONS_DEFINE (of course).

  What is proper way to use options in this situation? OPTIONS_SLAVE doesn't
 look right, as it override options file. I need something like
 OPTIONS_SLAVE_DEFAULT, which will work as OPTIONS_SLAVE if here is no
 ${OPTIONS_FILE} and could be overridden by ${OPTIONS_FILE}, if it is
 present.

-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>