preinst is in bve-train-br-class-323-3dcab 20100711-0ubuntu2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | #!/bin/sh
set -e
case "$1" in
install|upgrade)
dpkg-divert \
--package bve-train-br-class-323-3dcab \
--divert /usr/share/games/bve/Train/BR_Class_323/train.dat.2dcab \
--rename /usr/share/games/bve/Train/BR_Class_323/train.dat || true
;;
esac
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