Replacement for rdoc usage

According to this post, RDoc::usage is not currently available in ruby 1.9. Are there any good replacements available?

I'd be interested to hear what's available from the standard install as well as what's available from gems.

Solution

I like OptionParser (the thing that the article mentions that RDoc::usage is useful to complement).

It looks like any 1.9 bugs have been patched.

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