This file is indexed.

preinst is in php-libsodium 1.0.6-1build3.

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
# Automatically added by dh_php/UNDECLARED
for conf in libsodium; do
    dpkg-maintscript-helper rm_conffile /etc/php/mods-available/${conf}.ini -- "$@"
done

if [ "$1" = "upgrade" ]; then
    # Cleanup of the old symlinks (including broken symlinks)
    inidir=/etc/php/mods-available
    for dsoname in libsodium; do
	inifile=${dsoname}.ini
	find /etc/php/ -type l | \
	    while read symlink; do
		if [ "$(readlink $symlink)" = "${inidir}/$inifile" ]; then
		    rm -f "${symlink}"
		fi
	    done
    done
fi
# End automatically added section