Simple Emacs 24 configuration for Rails development

init.el

;; emacs configuration

(push "/usr/local/bin" exec-path)
(add-to-list 'load-path "~/.emacs.d")

(setq make-backup-files nil)
(setq auto-save-default nil)
(setq-default tab-width 2)
(setq-default indent-tabs-mode nil)
(setq inhibit-startup-message t)

(fset 'yes-or-no-p 'y-or-n-p)

(delete-selection-mode t)
(scroll-bar-mode -1)
(tool-bar-mode -1)
(blink-cursor-mode t)
(show-paren-mode t)
(column-number-mode t)
(set-fringe-style -1)
(tooltip-mode -1)

(set-frame-font "Menlo-16")
(load-theme 'tango)

(defun ruby-mode-hook ()
  (autoload 'ruby-mode "ruby-mode" nil t)
  (add-to-list 'auto-mode-alist '("Capfile" . ruby-mode))
  (add-to-list 'auto-mode-alist '("Gemfile" . ruby-mode))
  (add-to-list 'auto-mode-alist '("Rakefile" . ruby-mode))
  (add-to-list 'auto-mode-alist '("\\.rake\\'" . ruby-mode))
  (add-to-list 'auto-mode-alist '("\\.rb\\'" . ruby-mode))
  (add-to-list 'auto-mode-alist '("\\.ru\\'" . ruby-mode))
  (add-hook 'ruby-mode-hook '(lambda ()
                               (setq ruby-deep-arglist t)
                               (setq ruby-deep-indent-paren nil)
                               (setq c-tab-always-indent nil)
                               (require 'inf-ruby)
                               (require 'ruby-compilation)
                               (define-key ruby-mode-map (kbd "M-r") 'run-rails-test-or-ruby-buffer))))
(defun rhtml-mode-hook ()
  (autoload 'rhtml-mode "rhtml-mode" nil t)
  (add-to-list 'auto-mode-alist '("\\.erb\\'" . rhtml-mode))
  (add-to-list 'auto-mode-alist '("\\.rjs\\'" . rhtml-mode))
  (add-hook 'rhtml-mode '(lambda ()
                           (define-key rhtml-mode-map (kbd "M-s") 'save-buffer))))

(defun yaml-mode-hook ()
  (autoload 'yaml-mode "yaml-mode" nil t)
  (add-to-list 'auto-mode-alist '("\\.yml$" . yaml-mode))
  (add-to-list 'auto-mode-alist '("\\.yaml$" . yaml-mode)))

(defun css-mode-hook ()
  (autoload 'css-mode "css-mode" nil t)
  (add-hook 'css-mode-hook '(lambda ()
                              (setq css-indent-level 2)
                              (setq css-indent-offset 2))))
(defun is-rails-project ()
  (when (textmate-project-root)
    (file-exists-p (expand-file-name "config/environment.rb" (textmate-project-root)))))

(defun run-rails-test-or-ruby-buffer ()
  (interactive)
  (if (is-rails-project)
      (let* ((path (buffer-file-name))
             (filename (file-name-nondirectory path))
             (test-path (expand-file-name "test" (textmate-project-root)))
             (command (list ruby-compilation-executable "-I" test-path path)))
        (pop-to-buffer (ruby-compilation-do filename command)))
    (ruby-compilation-this-buffer)))

(require 'package)
(setq package-archives (cons '("tromey" . "http://tromey.com/elpa/") package-archives))
(package-initialize)

(add-to-list 'load-path "~/.emacs.d/el-get/el-get")
(require 'el-get)

(setq el-get-sources
      '((:name ruby-mode 
               :type elpa
               :load "ruby-mode.el"
               :after (lambda () (ruby-mode-hook)))
        (:name inf-ruby  :type elpa)
        (:name ruby-compilation :type elpa)
        (:name css-mode 
               :type elpa 
               :after (lambda () (css-mode-hook)))
        (:name textmate
               :type git
               :url "git://github.com/defunkt/textmate.el"
               :load "textmate.el")
        (:name rvm
               :type git
               :url "http://github.com/djwhitt/rvm.el.git"
               :load "rvm.el"
               :compile ("rvm.el")
               :after (lambda() (rvm-use-default)))
        (:name rhtml
               :type git
               :url "https://github.com/crazycode/rhtml.git"
               :features rhtml-mode
               :after (lambda () (rhtml-mode-hook)))
        (:name yaml-mode 
               :type git
               :url "http://github.com/yoshiki/yaml-mode.git"
               :features yaml-mode
               :after (lambda () (yaml-mode-hook)))
	))
(el-get 'sync)