Using Emacs Prelude now.... gonna figure things out

Signed-off-by: TuDatTr <tran.tuan-dat@mailbox.org>

emacs/.emacs.d/modules/prelude-erlang.el

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+;;; prelude-erlang.el --- Emacs Prelude: Erlang programming support.
+;;
+;; Copyright © 2011-2017 Gleb Peregud
+;;
+;; Author: Gleb Peregud <gleber.p@gmail.com>
+;; Version: 1.0.0
+;; Keywords: convenience erlang
+
+;; This file is not part of GNU Emacs.
+
+;;; Commentary:
+
+;; Erlang is a concurrent functional language.
+
+;;; 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 '(erlang))
+
+(defcustom wrangler-path nil
+  "The location of wrangler elisp directory."
+  :group 'prelude-erlang
+  :type 'string
+  :safe 'stringp)
+
+(require 'projectile)
+
+(when (require 'erlang-start nil t)
+
+  (eval-after-load 'erlang-mode
+    '(progn
+       (flymake-mode)))
+
+  (when (not (null wrangler-path))
+    (add-to-list 'load-path wrangler-path)
+    (require 'wrangler)))
+
+(add-hook 'erlang-mode-hook (lambda ()
+                              (setq erlang-compile-function 'projectile-compile-project)))
+
+(provide 'prelude-erlang)
+
+;;; prelude-erlang.el ends here