Automatically unindent “end” in ruby-mode after typing it?

Question

Is it possible to set ruby-mode to automatically unindented the end?

For instance, after the end is typed as so:

def foo
  # indented
  end

It should turn into this:

def foo
  # indented
end

Answer 1

You can modify your .emacs to enable ruby electric mode by adding the following:

(require 'ruby-electric)
(add-hook 'ruby-mode-hook (lambda () (ruby-electric-mode t)))

This will add a correctly indented end whenever you type class or def.