preinst is in chocolate-doom 3.0.0-4.
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 11 12 13 14 15 16 17 | #!/bin/sh
set -e
if [ "$1" = "install" ] || [ "$1" = "upgrade" ]
then
if dpkg --compare-versions "$2" lt-nl "2.1.0-2~"
then
update-alternatives --remove heretic /usr/games/chocolate-heretic
update-alternatives --remove hexen /usr/games/chocolate-hexen
update-alternatives --remove strife /usr/games/chocolate-strife
fi
fi
exit 0
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