huginn/deployment/logrotate/huginn

/home/huginn/huginn/log/*.log {
  daily
  missingok
  rotate 180
  # must use with delaycompress below
  compress
  dateext

  # this is important if using "compress" since we need to call
  # the "lastaction" script below before compressing:
  delaycompress

  # note the lack of the evil "copytruncate" option in this
  # config.  Unicorn supports the USR1 signal and we send it
  # as our "lastaction" action:
  lastaction
    pid=/home/huginn/huginn/tmp/pids/unicorn.pid
    if test -s $pid; then kill -USR1 "$(cat $pid)"; fi
  endscript
}