emacs_config_prelude/modules/prelude-ruby.el

;;; prelude-ruby.el --- Emacs Prelude: A nice setup for Ruby (and Rails) devs.
;;
;; Copyright © 2011-2022 Bozhidar Batsov
;;
;; Author: Bozhidar Batsov <bozhidar@batsov.com>
;; URL: https://github.com/bbatsov/prelude

;; This file is not part of GNU Emacs.

;;; Commentary:

;; Some basic configuration for Ruby and Rails development.

;;; License:

;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License
;; as published by the Free Software Foundation; either version 3
;; of the License, or (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Code:

(require 'prelude-programming)

(prelude-require-packages '(inf-ruby yari))

;; We never want to edit Rubinius bytecode
(add-to-list 'completion-ignored-extensions ".rbc")

;; Map yari to C-h R
(define-key 'help-command (kbd "R") 'yari)

(with-eval-after-load 'ruby-mode
  (defun prelude-ruby-mode-defaults ()
    ;; Don't auto-insert encoding comments
    ;; Those are almost never needed in Ruby 2+
    (setq ruby-insert-encoding-magic-comment nil)
    (inf-ruby-minor-mode +1)
    ;; CamelCase aware editing operations
    (subword-mode +1))

  (setq prelude-ruby-mode-hook 'prelude-ruby-mode-defaults)

  (add-hook 'ruby-mode-hook (lambda ()
                              (run-hooks 'prelude-ruby-mode-hook))))

(provide 'prelude-ruby)
;;; prelude-ruby.el ends here