#!/bin/echo ERROR: This script needs to be sourced. Please run as .

# toaster - shell script to start Toaster

# Copyright (C) 2013-2015 Intel Corp.

# 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 2 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/.

# Usage: source toaster [start|stop|restart-bitbake]
#                       [webport=<port>] [noui] [noweb]

# Helper function to kill a background toaster development server

webserverKillAll()
{
    local pidfile
    for pidfile in ${BUILDDIR}/.toastermain.pid ${BUILDDIR}/.runbuilds.pid; do
        if [ -f ${pidfile} ]; then
            pid=`cat ${pidfile}`
            while kill -0 $pid 2>/dev/null; do
                kill -SIGTERM -$pid 2>/dev/null
                sleep 1
                # Kill processes if they are still running - may happen
                # in interactive shells
                ps fux | grep "python.*manage.py runserver" | awk '{print $2}' | xargs kill
            done
            rm  ${pidfile}
        fi
    done
}

webserverStartAll()
{
    # do not start if toastermain points to a valid process
    if ! cat "${BUILDDIR}/.toastermain.pid" 2>/dev/null | xargs -I{} kill -0 {} ; then
        retval=1
        rm "${BUILDDIR}/.toastermain.pid"
    fi

    retval=0
    # you can always add a superuser later via
    # ../bitbake/lib/toaster/manage.py createsuperuser --username=<ME>
    $MANAGE migrate --noinput || retval=1

    if [ $retval -eq 1 ]; then
        echo "Failed migrations, aborting system start" 1>&2
        return $retval
    fi

    $MANAGE checksettings --traceback || retval=1

    if [ $retval -eq 1 ]; then
        printf "\nError while checking settings; aborting\n"
        return $retval
    fi

    echo "Starting webserver..."

    $MANAGE runserver "0.0.0.0:$WEB_PORT" \
           </dev/null >>${BUILDDIR}/toaster_web.log 2>&1 \
           & echo $! >${BUILDDIR}/.toastermain.pid

    sleep 1

    if ! cat "${BUILDDIR}/.toastermain.pid" | xargs -I{} kill -0 {} ; then
        retval=1
        rm "${BUILDDIR}/.toastermain.pid"
    else
        echo "Webserver address:  http://0.0.0.0:$WEB_PORT/"
    fi

    return $retval
}

INSTOPSYSTEM=0

# define the stop command
stop_system()
{
    # prevent reentry
    if [ $INSTOPSYSTEM -eq 1 ]; then return; fi
    INSTOPSYSTEM=1
    if [ -f ${BUILDDIR}/.toasterui.pid ]; then
        kill `cat ${BUILDDIR}/.toasterui.pid` 2>/dev/null
        rm ${BUILDDIR}/.toasterui.pid
    fi
    stop_bitbake
    webserverKillAll
    # unset exported variables
    unset DATABASE_URL
    unset TOASTER_CONF
    unset TOASTER_DIR
    trap - SIGHUP
    #trap - SIGCHLD
    INSTOPSYSTEM=0
}

start_bitbake() {
    unset BBSERVER
    bitbake --read conf/toaster.conf --server-only -t xmlrpc -B 0.0.0.0:0
    if [ $? -ne 0 ]; then
        echo "Bitbake server start failed"
        return 1
    fi
    export BBSERVER=0.0.0.0:-1
    export DATABASE_URL=`$MANAGE get-dburl`
    # we start the TOASTERUI only if not inhibited
    if [ $NOTOASTERUI -eq 0 ]; then
        bitbake --observe-only -u toasterui --remote-server=$BBSERVER -t xmlrpc \
            >>${BUILDDIR}/toaster_ui.log 2>&1 \
            & echo $! >${BUILDDIR}/.toasterui.pid
    fi
    return 0
}

stop_bitbake() {
    BBSERVER=0.0.0.0:-1 bitbake -m
    unset BBSERVER
    # force stop any misbehaving bitbake server
    lsof -t bitbake.lock | awk '{print $2}' | grep "[0-9]\+" | xargs -n1 -r kill
}

verify_prereq() {
    # Verify Django version
    reqfile=$(python -c "import os; print os.path.realpath('$BBBASEDIR/toaster-requirements.txt')")
    exp='s/Django\([><=]\+\)\([^,]\+\),\([><=]\+\)\(.\+\)/'
    exp=$exp'import sys,django;version=django.get_version().split(".");'
    exp=$exp'sys.exit(not (version \1 "\2".split(".") and version \3 "\4".split(".")))/p'
    if ! sed -n "$exp" $reqfile | python - ; then
        req=`grep ^Django $reqfile`
        echo "This program needs $req"
        echo "Please install with pip install -r $reqfile"
        return 2
    fi

    return 0
}

# read command line parameters
if [ -n "$BASH_SOURCE" ] ; then
    TOASTER=${BASH_SOURCE}
elif [ -n "$ZSH_NAME" ] ; then
    TOASTER=${(%):-%x}
else
    TOASTER=$0
fi

BBBASEDIR=`dirname $TOASTER`/..
MANAGE=$BBBASEDIR/lib/toaster/manage.py
OEROOT=`dirname $TOASTER`/../..

# this is the configuraton file we are using for toaster
# we are using the same logic that oe-setup-builddir uses
# (based on TEMPLATECONF and .templateconf) to determine
# which toasterconf.json to use.
# note: There are a number of relative path assumptions
# in the local layers that currently make using an arbitrary
# toasterconf.json difficult.

. $OEROOT/.templateconf
if [ -n "$TEMPLATECONF" ]; then
    if [ ! -d "$TEMPLATECONF" ]; then
        # Allow TEMPLATECONF=meta-xyz/conf as a shortcut
        if [ -d "$OEROOT/$TEMPLATECONF" ]; then
            TEMPLATECONF="$OEROOT/$TEMPLATECONF"
        fi
        if [ ! -d "$TEMPLATECONF" ]; then
            echo >&2 "Error: '$TEMPLATECONF' must be a directory containing toasterconf.json"
            return 1
        fi
    fi
fi

if [ "$TOASTER_CONF" = "" ]; then
    TOASTER_CONF="$TEMPLATECONF/toasterconf.json"
    export TOASTER_CONF=$(python -c "import os; print os.path.realpath('$TOASTER_CONF')")
fi

if [ ! -f $TOASTER_CONF ]; then
    echo "$TOASTER_CONF configuration file not found. Set TOASTER_CONF to specify file or fix .templateconf"
    return 1
fi

# this defines the dir toaster will use for
# 1) clones of layers (in _toaster_clones )
# 2) the build dir (in build)
# 3) the sqlite db if that is being used.
# 4) pid's we need to clean up on exit/shutdown
# note: for future. in order to make this an arbitrary directory, we need to
# make sure that the toaster.sqlite file doesn't default to `pwd` like it currently does.
export TOASTER_DIR=`pwd`

NOTOASTERUI=0
WEBSERVER=1
WEB_PORT="8000"
unset CMD
for param in $*; do
    case $param in
    noui )
            NOTOASTERUI=1
    ;;
    noweb )
            WEBSERVER=0
    ;;
    start )
            CMD=$param
    ;;
    stop )
            CMD=$param
    ;;
    webport=*)
            WEB_PORT="${param#*=}"
    esac
done

if [ `basename \"$0\"` = `basename \"${TOASTER}\"` ]; then
    echo "Error: This script needs to be sourced. Please run as . $TOASTER"
    return 1
fi

if [ "$1" = 'restart-bitbake' ] ; then
    stop_bitbake
    sleep 1
    start_bitbake
    rc=$?
    sleep 3
    return $rc
fi

verify_prereq || return 1

# We make sure we're running in the current shell and in a good environment
if [ -z "$BUILDDIR" ] ||  ! which bitbake >/dev/null 2>&1 ; then
    echo "Error: Build environment is not setup or bitbake is not in path." 1>&2
    return 2
fi

# this defines the dir toaster will use for
# 1) clones of layers (in _toaster_clones )
# 2) the build dir (in build)
# 3) the sqlite db if that is being used.
# 4) pid's we need to clean up on exit/shutdown
# note: for future. in order to make this an arbitrary directory, we need to
# make sure that the toaster.sqlite file doesn't default to `pwd`
# like it currently does.
export TOASTER_DIR=`dirname $BUILDDIR`

# Determine the action. If specified by arguments, fine, if not, toggle it
if [ "$CMD" = "start" ] ; then
    if [ -n "$BBSERVER" ]; then
	echo " Toaster is already running. Exiting..."
	return 1
fi
elif [ "$CMD" = "" ]; then
    if [ -z "$BBSERVER" ]; then
        CMD="start"
    else
        CMD="stop"
    fi
fi

echo "The system will $CMD."

# Execute the commands

case $CMD in
    start )
        # check if addr:port is not in use
        if [ "$CMD" == 'start' ]; then
             $MANAGE checksocket "0.0.0.0:$WEB_PORT" || return 1
        fi

        # Make sure it's safe to start by checking bitbake lock
        if [ -e $BUILDDIR/bitbake.lock ]; then
            python -c "import fcntl; fcntl.flock(open(\"$BUILDDIR/bitbake.lock\"), fcntl.LOCK_EX|fcntl.LOCK_NB)" 2>/dev/null
            if [ $? -ne 0 ] ; then
                echo "Error: bitbake lock state error. File locks show that the system is on." 1>&2
                echo "Please wait for the current build to finish, stop and then start the system again." 1>&2
                return 3
            fi
        fi

        # kill Toaster web server if it's alive
        if [ -e $BUILDDIR/.toastermain.pid ] && kill -0 `cat $BUILDDIR/.toastermain.pid`; then
            echo "Warning: bitbake appears to be dead, but the Toaster web server is running." 1>&2
            echo " Something fishy is going on." 1>&2
            echo "Cleaning up the web server to start from a clean slate."
            webserverKillAll
        fi

        # Create configuration file
        conf=${BUILDDIR}/conf/toaster.conf
        echo "# Created by toaster start script" > $conf
        echo "INHERIT+=\"toaster buildhistory\"" >> $conf

        if [ $WEBSERVER -gt 0 ] && ! webserverStartAll; then
            echo "Failed ${CMD}."
            return 4
        fi
        start_bitbake
        if [ $? -eq 0 ]; then
            $MANAGE runbuilds & echo $! >${BUILDDIR}/.runbuilds.pid
            # set fail safe stop system on terminal exit
            trap stop_system SIGHUP
            echo "Successful ${CMD}."
            return 0
        else
            # failed start, do stop
            stop_system
            echo "Failed ${CMD}."
            return 1
        fi
        # stop system on terminal exit
        set -o monitor
        trap stop_system SIGHUP
    ;;
    stop )
        stop_system
        echo "Successful ${CMD}."
    ;;
esac