<ruby>
run_single("setg LPORT #{ENV['LPORT']}") if ENV['LPORT']
if ENV['LHOST']
  lhost = ENV['LHOST']
else
  lhost = %x(hostname -i)
end
run_single("setg LHOST #{lhost}")
run_single("db_connect #{ENV['DATABASE_URL']}") if ENV['DATABASE_URL']
</ruby>