This file is indexed.

preinst is in upower 0.9.15-3git1.

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

# Prepare to move a conffile without triggering a dpkg question
prep_mv_conffile() {
    local PKGNAME="$1"
    local CONFFILE="$2"

    [ -e "$CONFFILE" ] || return 0

    local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
    local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
            sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
    if [ "$md5sum" = "$old_md5sum" ]; then
        rm -f "$CONFFILE"
    fi
}

case "$1" in
install|upgrade)
    if dpkg --compare-versions "$2" lt "0.9.4-2"; then
        prep_mv_conffile upower "/etc/UPower.conf"
    fi
esac