discourse/config/unicorn_launcher

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#!/bin/bash
# This is a helper script you can use to supervise unicorn, it allows you to perform a live restart
# by sending it a USR2 signal
LOCAL_WEB="http://127.0.0.1:3000/"
function on_exit()
{
kill $UNICORN_PID
echo "exiting"
}
function on_reload()
{
echo "Reloading unicorn"
kill -s USR2 $UNICORN_PID
sleep 10
curl $LOCAL_WEB &> /dev/null
NEW_UNICORN_PID=`ps -f --ppid $UNICORN_PID | grep unicorn | grep -v worker | awk '{ print $2 }'`
kill $UNICORN_PID
echo "Old pid is: $UNICORN_PID New pid is: $NEW_UNICORN_PID"
UNICORN_PID=$NEW_UNICORN_PID
}
export UNICORN_SUPERVISOR_PID=$$
trap on_exit EXIT
trap on_reload USR2
unicorn $@ &
UNICORN_PID=$!
echo "supervisor pid: $UNICORN_SUPERVISOR_PID unicorn pid: $UNICORN_PID"
while kill -0 $UNICORN_PID
do
sleep 1
done