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

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

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

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+;;; prelude-ocaml.el --- Emacs Prelude: decent Perl coding settings.
+;;
+;; Copyright © 2014-2017 Geoff Shannon
+;;
+;; Author: Geoff Shannon <geoffpshannon@gmail.com>
+;; URL: https://github.com/bbatsov/prelude
+;; Version: 1.0.0
+;; Keywords: convenience
+
+;; This file is not part of GNU Emacs.
+
+;;; Commentary:
+
+;; tuareg is the preferred ocaml mode for Emacs
+
+;; These setups for ocaml assume that you are using the OPAM package
+;; manager (http://opam.ocaml.org/).
+
+;; Because of the apparent complexity of getting emacs environment
+;; variables setup to use opam correctly, it is instead easier to use
+;; opam itself to execute any necessary commands.
+
+;; Also, the standard OCaml toplevel usage has been replaced in favor
+;; of UTOP, the universal toplevel, and we assume that you are using
+;; the Jane Street Core libraries rather than the regular OCaml
+;; standard libraries
+
+;; The minimum required setup for using Prelude's OCaml setup would be
+;; to install OPAM, and then, minimally `opam install core utop'.  A
+;; good getting started guide is available at
+;; https://github.com/realworldocaml/book/wiki/Installation-Instructions
+
+;;; 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:
+
+(prelude-require-packages '(tuareg utop merlin flycheck-ocaml))
+
+(require 'tuareg)
+(require 'utop)
+(require 'merlin)
+
+(setq auto-mode-alist
+      (append '(("\\.ml[ily]?\\'" . tuareg-mode)
+                ("\\.topml\\'" . tuareg-mode))
+              auto-mode-alist))
+
+(with-eval-after-load 'merlin
+  ;; Disable Merlin's own error checking
+  (setq merlin-error-after-save nil)
+
+  ;; Enable Flycheck checker
+  (flycheck-ocaml-setup))
+
+(add-hook 'tuareg-mode-hook #'utop-minor-mode)
+(add-hook 'tuareg-mode-hook #'merlin-mode)
+
+(add-hook 'tuareg-mode-hook (lambda ()
+                              (progn
+                                (define-key tuareg-mode-map (kbd "C-c C-s")
+                                  'utop)
+                                (setq compile-command
+                                      "opam config exec corebuild "))))
+
+;; Setup merlin completions company is used by default in prelude
+(add-to-list 'company-backends 'merlin-company-backend)
+
+;; Merlin also offers support for autocomplete, uncomment this next line
+;; to activate it.
+;; (setq merlin-use-auto-complete-mode t)
+
+(setq utop-command "opam config exec utop -- -emacs"
+      merlin-error-after-save nil)
+
+(provide 'prelude-ocaml)
+
+;;; prelude-ocaml.el ends here