#!/bin/sh
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
### BEGIN INIT INFO
# Provides:          couchdb
# Required-Start:    $remote_fs $syslog $network
# Required-Stop:     $remote_fs $syslog $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Apache CouchDB, a RESTful document oriented database
# Description:       Apache CouchDB is a distributed, fault-tolerant and schema-free
#                    document-oriented database accessible via a RESTful HTTP/JSON API. Among other
#                    features, it provides robust, incremental replication with bi-directional
#                    conflict detection and resolution, and is queryable and indexable using a
#                    table-oriented view engine with JavaScript acting as the default view
#                    definition language.
### END INIT INFO
# Author: CouchDB Developers <dev@couchdb.apache.org>

PATH=/sbin:/usr/sbin:/bin:/usr/bin
export PATH

. /lib/lsb/init-functions

PID="$(pgrep -u couchdb beam* || true)"
PIDFILE=/var/run/couchdb.pid
NAME="couchdb"
DESC="Apache CouchDB"
DAEMON=/opt/couchdb/bin/couchdb
START_ARGS="--chuid couchdb:couchdb --chdir /opt/couchdb --background"
STOP_ARGS="--pid $PID"

do_usage() {
    echo "Usage: couchdb {start|stop|status|restart|try-restart|force-reload}" >&2
}

do_start_cmd() {
    start-stop-daemon --start --quiet ${PIDFILE:+--pidfile ${PIDFILE} --make-pidfile} \
        $START_ARGS \
        --startas $DAEMON --name $NAME --exec $DAEMON --test > /dev/null \
        || return 1
    start-stop-daemon --start --quiet ${PIDFILE:+--pidfile ${PIDFILE} --make-pidfile} \
        $START_ARGS \
        --startas $DAEMON --name $NAME --exec $DAEMON -- $DAEMON_ARGS \
        || return 2
}

do_start() {
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
    do_start_cmd
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
}

do_stop_cmd() {
    RETVAL=2
    if [ ! -z "$PID" ]; then
        start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
            --pid $PIDFILE
        RETVAL="$?"
        [ "$RETVAL" = 2 ] && return 2
    fi
    rm -f ${PIDFILE}
    return $RETVAL
}

do_stop() {
    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop_cmd
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
}

do_restart() {
    [ "$VERBOSE" != no ] && log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop_cmd
    do_start_cmd
    case "$?" in
        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
}

do_force_reload() {
    do_restart
}

do_status() {
    pgrep -u couchdb beam* > /dev/null && status="$?" || status="$?"
    if [ "$status" = 0 ]; then
        log_success_msg "$NAME is running"
        return 0
    elif [ "$status" = 4 ]; then
        log_failure_msg "could not access PID file for $NAME"
        return $status
    else
        log_failure_msg "$NAME is not running"
        return $status
    fi

}

if [ "$DEBUG" = "true" ] ; then
    set -x
fi

# Exit if the package is not installed
if [ none != "$DAEMON" ] && [ ! -x "$DAEMON" ] ; then
    exit 0
fi

case "$1" in
    start)
        do_start
    ;;
    stop)
        do_stop
    ;;
    status)
        do_status
    ;;
    reload)
        do_usage
        exit 3
    ;;
    force-reload)
        do_force_reload
    ;;
    restart)
        do_restart
    ;;
    try-restart)
        log_daemon_msg "Trying to restart $DESC" "$NAME"
        if do_status > /dev/null 2>&1 ; then
            do_restart
            log_end_msg $?
        else
            log_progress_msg "is not running."
            log_end_msg 1
        fi
    ;;
    '')
        do_usage
        exit 3
    ;;
esac
exit $?