What tools are available for automatically formatting Ruby / Rails code

Question

I am currently using GEdit with several plugins for developing Ruby on Rails. One thing I would like to have is a way to automatically format the source files (.rb,. *. Erb, etc.). Ideally, this would be something that I could invoke from the command line and / or GEdit.

The command line tool would be nice, because I can configure Git binding to automatically format on commit.

What are my options? What are the pros and cons of each?

Answer 1

, : http://www.arachnoid.com/ruby/rubyBeautifier.html

Answer 2

rubocop?

rubocop -a

Answer 3

Not quite the answer to your question, but I'm quite happy with the RubyMine code format.