apt.conf.d actions

[Admar Schoonen <admar@luon.net>]

Where can I get information about the possible "actions" which can be specified
in /etc/apt/apt.conf.d/ ?

I'm asking this, since I've written a small program which generates a
sources.list.example which contains all distributions of the partial debian
mirror on a machine (azrael); Now I'm looking for a way to automatically
download that sources.list.example on a client every time apt-get update is
run on that client. Is something like putting
APT::Pre-Update {"/usr/local/sbin/getsources.list ftp://azrael/debian";};
in /etc/apt/apt.conf.d/60getsources.list possible?

Kind regards,

Admar Schoonen