Even if there's no one-click option, it'd be nice if the API exposed a much more flexible set of issue editing options to make it possible for us to write better importers ourselves.
If only they had access to some kind of command line tool which lets you bulk pull and push and merge histories. Do you think they have something like that at github? :-)
They say you shouldn't explain your own jokes. My comment was that github is built around a tool that makes it really easy and efficient to import and merge histories. Namely git. It's amusing that the value-add portion of github, the web bits, suffer from problems like this, that a tool like git could conceivably be applied to.
Indeed they do say that. My – admittedly rather poor attempt at a – joke was that the ‘command line tool’ to which you were referring is indeed quite usable and user-friendly; as opposed to, say, ed scripts.
Well if you want someone to do something, you should make it as easy as possible. Therefore, if you want someone to migrate their repo to your site, you should make it as easy as possible for them to do so.
Plus it's up to the developer. We can't have one-click-do-all buttons for everything.