This file is indexed.

postinst is in cmake 2.8.7-0ubuntu4.

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

set -e

pkgname=`basename "$0" .postinst`
docdir="/usr/share/doc/$pkgname"

# Manually create /usr/share/doc/$pkgname symlink on upgrades (see #404850)
if [ "$1" = "configure" ] && [ -n "$2" ] && \
   [ ! -L "$docdir" ] &&  [ -d "$docdir" ] && \
     dpkg --compare-versions "$2" lt "2.8.3-3";
then
    rmdir "$docdir"
    ln -s "cmake-data" "$docdir"
fi