preinst is in bit-babbler 0.8.
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 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | #! /bin/sh
set -e
# summary of how this script can be called:
# * <new-preinst> `install'
# * <new-preinst> `install' <old-version>
# * <new-preinst> `upgrade' <old-version>
# * <old-preinst> `abort-upgrade' <new-version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
check_seedd_conf()
{
local oldconf='/etc/default/seedd'
# Check that the old file hasn't already been removed, and that it hasn't
# been usurped by some other package (which is unlikely, but would be Bad
# for what we're going to do next).
[ -e "$oldconf" ] || return 0
dpkg-query -L bit-babbler | grep -F -q -x "$oldconf" || return 0
local sys_sum=$(md5sum "$oldconf" | sed -e 's/ .*//')
local pkg_sum=$(dpkg-query -W -f='${Conffiles}' bit-babbler | sed -n -e "\'^ $oldconf ' { s/ obsolete$//; s/.* //; p }")
# If it's unmodified, move it aside for deletion if the upgrade succeeds.
[ "$sys_sum" != "$pkg_sum" ] || mv -f "$oldconf" "${oldconf}.dpkg-remove"
# Otherwise, we'll migrate it to the new form in postinst.
}
case "$1" in
install|upgrade)
# Version 0.8 adds /etc/bit-babbler/seedd.conf, replacing the previous
# daemon configuration options which were set in /etc/default/seedd.
dpkg --compare-versions -- "$2" ge-nl '0.8~' || check_seedd_conf
;;
abort-upgrade)
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
exit 0
# vi:sts=4:sw=4:noet
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