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#!/bin/sh

# Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
#               2021 Simon Spöhel <simon.spoehel@open-infrastructure.net>
#
# SPDX-License-Identifier: GPL-3.0+
#
# 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 <https://www.gnu.org/licenses/>.

set -e

PROJECT="open-infrastructure"
SOFTWARE="compute-tools"
PROGRAM="container"

CONFIG="/etc/${SOFTWARE}/config"
HOOKS="/etc/${SOFTWARE}/hooks"
MACHINES="/var/lib/machines"

SCRIPT="${0}"
export SCRIPT

Parameters ()
{
	GETOPT_LONGOPTIONS="name:,cnt.container-server:,id:,script:,shortname:,config-template:,verbose,"
	GETOPT_OPTIONS="n:,i:,s:,c:,v,"

	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${COMMAND} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"

	if [ "${?}" != "0" ]
	then
		echo "'${COMMAND}': getopt exit" >&2
		exit 1
	fi

	eval set -- "${PARAMETERS}"

	while true
	do
		case "${1}" in
			-n|--name)
				NAME="${2}"
				shift 2
				;;

			--cnt.container-server)
				CNT_CONTAINER_SERVER="${2}"
				shift 2
				;;

			-i|--id)
				ID="${2}"
				shift 2
				;;

			-s|--script)
				SCRIPT="${2}"
				shift 2
				;;

			--shortname)
				SHORTNAME="${2}"
				shift 2
				;;

			-t|--config-template)
				CONFIG_TEMPLATE="${2}"
				shift 2
				;;

			-v|--verbose)
				VERBOSE="true"
				shift 1
				;;

			--)
				shift 1
				break
				;;

			*)
				echo "'${COMMAND}': getopt error" >&2
				exit 1
				;;
		esac
	done
}

Usage ()
{
	# FIXME
	echo WIP
	echo "Usage: container create -n|--name NAME -s|--script ${SCRIPT} -- [-p|--preseed-file FILE]" >&2
	exit 1
}

Parameters "${@}"

if [ -z "${NAME}" ]
then
	Usage
fi

if [ -e "${MACHINES}/${NAME}.vmdk" ]
then
	echo "'${NAME}': container already exists" >&2
	exit 1
fi

if [ "$(id -u)" -ne 0 ]
then
	echo "'${NAME}': need root privileges" >&2
	exit 1
fi


Commands ()
{
	DIRECTORY="${1}"

	# maximum of 15 characters, prefix is 'veth-'
	HOSTNAME_SHORT="$(echo ${NAME} | cut -c-8)"
	HOST_INTERFACE_NAME="$(echo ${NETWORK1_VETH:-veth-${HOSTNAME_SHORT}-0})"

	sed -i	-e "s|^cnt.auto=.*|cnt.auto=${CNT_AUTO}|g" \
		-e "s|^cnt.container-server=.*|cnt.container-server=${CNT_CONTAINER_SERVER}|g" \
		-e "s|^cnt.network-bridge=.*|cnt.network-bridge=${HOST_INTERFACE_NAME}:${NETWORK1_BRIDGE:-bridge0}|g" \
		-e "s|^cnt.overlay=.*|cnt.overlay=${CNT_OVERLAY}|g" \
		-e "s|^cnt.overlay-options=.*|cnt.overlay-options=${CNT_OVERLAY_OPTIONS}|g" \
		-e "s|^bind=.*|bind=${BIND}|g" \
		-e "s|^bind-ro=.*|bind-ro=${BIND_RO}|g" \
		-e "s|^network-veth-extra=.*|network-veth-extra=${HOST_INTERFACE_NAME}:eno1|g" \
	"${CONFIG}/${NAME}.conf"

	if [ "${NETWORK_NUMBER}" -ge 2 ]
	then
		for NUMBER in $(seq 2 ${NETWORK_NUMBER})
		do
			eval IPV4_METHOD="$`echo NETWORK${NUMBER}_IPV4_METHOD`"
			eval IPV6_METHOD="$`echo NETWORK${NUMBER}_IPV6_METHOD`"

			if [ -z "${IPV4_METHOD}" ] && [ -z "${IPV6_METHOD}" ]
			then
				continue
			fi

			eval HOST_INTERFACE_NAME="$`echo NETWORK${NUMBER}_VETH`"

			HOST_INTERFACE_NAME="$(echo ${HOST_INTERFACE_NAME:-veth-${HOSTNAME_SHORT}-${NUMBER}})"
			CONTAINER_INTERFACE_NAME="eno${NUMBER}"

			sed -i -e "/^register=.*/ a network-veth-extra=${HOST_INTERFACE_NAME}:${CONTAINER_INTERFACE_NAME}" "${CONFIG}/${NAME}.conf"

			eval BRIDGE="$`echo NETWORK${NUMBER}_BRIDGE`"
			sed -i -e "/^register=.*/ a cnt.network-bridge=${HOST_INTERFACE_NAME}:${BRIDGE:-bridge${NUMBER}}" "${CONFIG}/${NAME}.conf"
		done
	fi
}

## Generic parts

#copy base image

BASE_IMAGE="/srv/qemu/vEOS-lab.vmdk"
cp "${BASE_IMAGE}" "${MACHINES}/${NAME}.vmdk"