preinst is in unison-gtk 2.40.65-1ubuntu1.
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 | #!/bin/sh
set -e
case "$1" in
upgrade)
if dpkg --compare-versions "$2" lt "2.13.16-1" && dpkg --compare-versions "$2" ge "2.10.2-1"; then
# This file is common between unison and unison-gtk package
if true; then
echo "Deleting alternatives to unison2.10.2-gtk"
update-alternatives --remove unison-gtk /usr/bin/unison2.10.2-gtk
else
echo "Deleting alternatives to unison2.10.2"
update-alternatives --remove unison /usr/bin/unison2.10.2
fi
fi
;;
esac
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