Added to a Spacemacs layer to `mix format` on save

funcs.el

;;; Mostly nicked from https://github.com/jasongoodwin/emacs-elixir-formatter/blob/master/elixir-formatter.el
;;; I followed instructions from http://www.cultivatehq.com/posts/spacemacs-shared-config/ to add a Spacemacs
;;; layer, and just added this as a funcs.el file.
;;;
;;; (I still don't know what I'm doing.)


(defcustom
  mix-location
  "~/.asdf/shims/mix"
  "Location of mix binary (must be elixir 1.6 or later)"
  :type 'string
  :group 'mix-format
  )

(defcustom
  elixir-location
  "~/.asdf/shims/elixir"
  "Location of elixir binary (must be elixir 1.6 or later)"
  :type 'string
  :group 'mix-format
  )

(defun
    elixir-format-current-file
    ()
  "Saves the file and then calls out to mix to format the code."
  (interactive)
  (save-buffer)
  (defvar current-file (buffer-file-name))
  (shell-command (concat elixir-location " " mix-location " format " current-file)))

(defun
    elixir-no-save-format-current-file
    ()
  "Saves the file and then calls out to mix to format the code."
  (defvar current-file (buffer-file-name))
  (shell-command (concat elixir-location " " mix-location " format " current-file)))

;; elixir-mode hook
(add-hook 'elixir-mode-hook
          (lambda () (add-hook 'after-save-hook 'elixir-no-save-format-current-file)))