This file is indexed.

preinst is in python-pyglew 0.1.2-4build2.

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.

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#!/bin/sh
# TODO: remove this file after releasing Squeeze
set -e

PYCENTRAL=/usr/bin/pycentral

if [ "$1" = upgrade ]
then
       if dpkg --compare-versions "$2" lt 0.1.2-4 ; then
	   if [ -x $PYCENTRAL ]; then
               # explicitly remove old python-central files
               pycentral pkgremove python-pyglew
	   fi
	   # be really sure also removing left-over files and dirs
	   for pyversion in 2.4 2.5; do
	   	rm -rf /usr/lib/python$pyversion/site-packages/pyglew*
           done
       fi
fi