#!/bin/sh
# Copyright (C) 2017 Dmitry Bogatov <KAction@gnu.org>

# Author: Dmitry Bogatov <KAction@gnu.org>

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

set -e

postinst () {
    local action="${1}" previous="${2:-}"

    # Fresh installation (not upgrade). It is important to not override
    # local admin decision (see #899242).
    if [ "${ENABLE}" = yes ] && \
        dpkg --compare-versions "${previous}" '<<' "${SINCE}" ; then
        ln -sf "/etc/sv/$NAME" "/etc/runit/runsvdir/default/$NAME"
    fi
}

postrm () {
	local action="${1}"

	if [ "${action}" != 'purge' ] && [ "${action}" != 'remove' ] ; then
	    return
	fi

	# Links in other runsvdirs is responsibility of administrator.
	rm -f "/etc/runit/runsvdir/default/$NAME"

	# If runscript was never invoked, there will be no files
	# in this directory, and `dpkg' will remove it. In this case,
	# we have nothing to do.
	for supervise in "/var/lib/runit/supervise/$NAME" \
	                 "/var/lib/runit/log/supervise/$NAME" ; do
		if [ -d "$supervise" ] ; then

			# Actually only `down' may be absent, but it does not
			# matter.

			for file in control lock ok pid stat status down ; do
				rm -f "$supervise/$file"
			done

			# It should be empty now. If it is not, it means that
			# system administrator put something there. It is very
			# stupid, but will of user is sacred, and directory is
			# left as-is in such case.
			#
			# NOTE: Non-POSIX option is used. The day coreutils will
			# no longer be essential, it will require a fix.
			rmdir --ignore-fail-on-non-empty "$supervise"
		fi
	done
}

"$@"
# vim: sw=4:et