#!/sbin/openrc-run
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

if [ "${SVCNAME}" = "minecraft-server" ]; then
	instance="main"
else
	instance="${SVCNAME#minecraft-server.}"
fi

dtach_tmpfile="$(mktemp -u)"
minecraft_command="/usr/bin/minecraft-server"
minecraft_logs="/var/log/minecraft-server"
minecraft_logs_instance="${minecraft_logs}/${instance}"
minecraft_path="/var/lib/minecraft-server"
minecraft_path_instance="${minecraft_path}/${instance}"
name="Minecraft Server (World: ${instance})"
pidfile="/run/minecraft-server.${instance}.pid"
start_stop_daemon_args="--chdir ${minecraft_path_instance} --env JAVA_OPTS='${MINECRAFT_OPTS}'"

description_attach="Attaches to the session (interactive console) of the Minecraft server"
extra_started_commands="attach"

command="/usr/bin/dtach"
command_background="true"
command_args="-N ${dtach_tmpfile} ${minecraft_command}"
command_group="minecraft"
command_user="minecraft"

depend() {
	use net
}

start_pre() {
	checkpath -d -o "${command_user}:${command_group}" -q "${minecraft_path}" "${minecraft_path_instance}"

	checkpath -f -o "${command_user}:${command_group}" -q "${minecraft_path_instance}"/eula.txt
	echo "eula=true" > "${minecraft_path_instance}"/eula.txt

	checkpath -d -o "${command_user}:${command_group}" -q "${minecraft_logs}" "${minecraft_logs_instance}"

	if [ ! -L "${minecraft_path_instance}"/logs ]; then
		cd "${minecraft_path_instance}" && ln -s ../../../log/minecraft-server/"${instance}" logs
	fi

	if [ -z "${MINECRAFT_OPTS}" ]; then
		eerror "You must define 'MINECRAFT_OPTS' in '/etc/conf.d/${SVCNAME}'!"
		return 1
	fi
}

attach() {
	pidnumber="$(cat ${pidfile})"
	dtach_tmpfile="$(cat /proc/${pidnumber}/cmdline | tr '\0' ' ' | awk '{print $3}')"

	if [ -S "${dtach_tmpfile}" ]; then
		eval "${command}" -a "${dtach_tmpfile}" "${DTACH_OPTS}"
	else
		eerror "The determined socket file for dtach could not be found!"
		eerror "Did the process crash?"
	fi
}
