I don't have Cron.runPropellor on my laptop because it is often offline. But I would like a cronjob that tries to spin the host if it's online. Mainly to keep sbuild chroots up-to-date.

I was wondering what the cleanest way to implement this would be. Cron.runPropellor could be split into Cron.runPropellor and Cron.runPropellorWhenOnline, the latter of which does wget http://google.com >/dev/null and exits if that command fails.

Or there could be some kind of property which, when set on a host, causes all spins to abort if the host if offline.

And is wgetting Google's homepage the right way to check that we have Internet access?