preinst is in python3-testrepository 0.0.20-3.
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 | #!/bin/sh
set -e
if [ "${1}" = "upgrade" ] ; then
if [ ! -h /usr/bin/testr ] && [ -e /usr/bin/testr ] ; then
rm /usr/bin/testr
fi
fi
exit 0
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