RDoc preview in Textmate

While working on writing some RDOC documentation within Textmate, Rein Henrichs and I ran into a problem. Textmate will give you previews if you use markdown, but not RDOC. Below is how to do it.

Create /usr/bin/rdoc2html:

#!/usr/bin/env ruby -rrdoc/markup/simple_markup -rrdoc/markup/simple_markup/to_html
input = ARGF ? ARGF.read : STDIN.read
print SM::SimpleMarkup.new.convert(input, SM::ToHtml.new)

Make the file executable:

sudo chmod +x /usr/bin/rdoc2html

In textmate, hit Cntrl-Option-Command-P. In the bottom left corner, click Show options. Click the Pipe text through checkbox and enter "/usr/bin/rdoc2html" in the text box.