From: Xavier Noria <fxn@...>
Date: 2007-02-09T16:42:29+09:00
Subject: Re: auto indentation in ruby electric mode

On Feb 9, 2007, at 12:35 AM, james.d.masters@gmail.com wrote:

> On Feb 8, 9:04 am, dannyy...@gmail.com wrote:
>> Hi,
>> I'm learning to use Emacs to program Ruby. The ruby-electric-mode
>> works well except that after I hit ENTER, my cursor will not be
>> automatically indented. For example, if I type "def foo" and then
>> ENTER, my cursor will be placed at the first column instead of being
>> properly indented, say, two spaces to the right of "def". Is there  
>> any
>> way to make the electric mode do auto indentation? Thanks!
>
> Here's what I picked up from a website about a month ago (and my left
> pinkey is much happier now):
>
> ;; Automatically indent the next line...
> (mapcar
>  (lambda (mode)
>    (let ((mode-hook (intern (concat (symbol-name mode) "-hook")))
>          (mode-map  (intern (concat (symbol-name mode) "-map"))))
>      (add-hook mode-hook
>                `(lambda nil
>                   (local-set-key (kbd "RET")
>                                  (or (lookup-key ,mode-map "\C-j")
>                                      (lookup-key global-map "\C-
> j")))))))
>  '(ada-mode c-mode c++-mode cperl-mode emacs-lisp-mode java-mode html-
> mode
>             lisp-mode php-mode ruby-mode sh-mode sgml-mode))

Just in case, if mapping RET globally is fine just put this single  
line instead:

   (global-set-key (kbd "RET") 'newline-and-indent)

Less specific but much simple.

-- fxn