emacs-lisp code to set up package mgmt and Rmarkdown editing with syntax highlighting and shortcuts

Rmarkdown-setup.el

;; This code will do two things:
;; 1) Will set you up with use-package for emacs package management
;; 2) Will set your emacs for Rmarkdown editing with syntax highlighting and shortcuts
;; It assummes the following:
;; 1) You have a recent Emacs (>=24.4 or so) and have minimal customizations
;;
;; TODO: Add functions to knit and preview 
;;
;; To use: copy the code below and add it to your .init.el file or equivalent

;; Configuring Package Management
(require 'package)
(setq package-enable-at-startup nil)
(setq package-archives '(("gnu" . "https://elpa.gnu.org/packages/")
                         ("melpa-stable" . "https://stable.melpa.org/packages/")
                         ("melpa" . "https://melpa.org/packages/")))
(setq package-archive-priorities '(("melpa-stable" . 20)
				                   ("gnu" . 10)
				                   ("melpa" . 0)))
(setq package-menu-async t)
(package-initialize)
; Bootstrap `use-package'
(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))

; Enable use-package
(eval-when-compile
  (require 'use-package))

;; Use markdown mode for Rmd files
(use-package markdown-mode
  :ensure t
  :defer t               
  :mode (("\\.md\\'" . markdown-mode)))

(use-package poly-R
  :ensure t)

(use-package poly-markdown
  :ensure t
  :commands (poly-markdown-mode)
  :mode (("\\.rmd\\'" . poly-markdown+r-mode)
	 ("\\.Rmd\\'" . poly-markdown+r-mode)))