preinst is in libz3-java 4.4.1-0.3build4.
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 18 19 20 21 | #!/bin/sh
set -e
case "$1" in
install|upgrade)
# dpkg does not replace directories with symlinks.
if dpkg --compare-versions "$2" lt "4.4.0-3" ; then
rm -rf /usr/share/doc/libz3-java
fi
;;
abort-upgrade)
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
exit 0
|