preinst is in plan 1.10.1-2.
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 | #!/bin/sh
set -e
if [ -r /usr/lib/plan/holiday ] && [ ! -L /usr/lib/plan/holiday ]
then
mv /usr/lib/plan/holiday /etc/plan/
echo >&2 Moved /usr/lib/plan/holiday to /etc/plan/holiday.
fi
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