Wiki functionality with rails?

What are the best plugins or gems to create a wiki 开发者_如何学运维functionality with rails ?

1. How to maintain versions ?
2. How to show html difference between two version ?

Any Idea ?

I've got a wiki site which uses vestal_versions for versioning and this cool javascript diff for highlighting changes, similar to stack overflow. It works fine and was really simple to set up. By escaping html tags before diff'ing you can output changes to html tags and also display inserted javascript.

If you don't want to build it yourself, you could just use Instiki:

http://instiki.org/show/HomePage

And even if you do want to build it yourself, the source is a good resource to answer your questions:

https://github.com/parasew/instiki

In looking for other ruby/rails wikis I also found http://www.wagn.org/