Alternatives in package_lists?

[Thomas Lange]

>>>>> On Thu, 26 Apr 2018 17:34:23 +0200, Steffen Grunewald <steffen.grunewald at aei.mpg.de> said:

    > Is it possible to specify "a | b" in a package_config file, so that "a"
    > gets installed if available, and "b" otherwise?
FAI only creates a long list of package names and then calls apt-get,
aptitude or apt. If one of those tools provides a function like install
a if available or b otherwise, then FAI cloud use it. FAI itself does
not have this function yet. Patches are welcome ;-)

I wonder if any of the config management tools provides such a function?
-- 
regards Thomas