Adding rubocop to ruby layer

layers/!lang/ruby/README.org

@@ -10,6 +10,7 @@
  - [[#key-bindings][Key bindings]]
      - [[#ruby-enh-ruby-mode-robe-inf-ruby-ruby-tools][Ruby (enh-ruby-mode, robe, inf-ruby, ruby-tools)]]
      - [[#ruby-test-mode][ruby-test-mode]]
+     - [[#rubocop][rubocop]]
 
 * Description
 
@@ -32,6 +33,7 @@ based on your version manager):
 
 - =pry= and =pry-doc= are required for *jump to definition* and *code documentation* (=robe-mode=)
 - =ruby_parser= is required for *goto-step_definition* in =feature-mode=
+- =rubocop= is required for rubocop integration
 
 You can install the gems in the context of your current project by
 adding them to the =Gemfile=, e.g.:
@@ -64,6 +66,7 @@ Possible values are =rbenv= and =rvm=.
 
 ** Ruby (enh-ruby-mode, robe, inf-ruby, ruby-tools)
 
+
 | Key binding | Description                                 |
 |-------------+---------------------------------------------|
 | ~SPC m g g~ | go to definition (robe-jump)                |
@@ -87,3 +90,14 @@ a couple of useful keybindings:
 |-------------+---------------------|
 | ~SPC m t b~ | run test file       |
 | ~SPC m t t~ | run test at pointer |
+
+** rubocop
+
+| Key binding   | Description                   |
+|---------------+-------------------------------|
+| ~SPC m r a f~ | check current file            |
+| ~SPC m r a d~ | check current directory       |
+| ~SPC m r a p~ | check current project         |
+| ~SPC m r a F~ | autocorrect current file      |
+| ~SPC m r a D~ | autocorrect current directory |
+| ~SPC m r a P~ | autocorrect current project   |

layers/!lang/ruby/packages.el

@@ -18,7 +18,8 @@
     flycheck
     robe
     ruby-test-mode
-    ruby-tools))
+    ruby-tools
+    rubocop))
 
 (when ruby-version-manager
   (add-to-list 'ruby-packages ruby-version-manager))
@@ -116,6 +117,20 @@
       (evil-leader/set-key-for-mode 'enh-ruby-mode "mtb" 'ruby-test-run)
       (evil-leader/set-key-for-mode 'enh-ruby-mode "mtt" 'ruby-test-run-at-point))))
 
+(defun ruby/init-rubocop ()
+  (use-package rubocop
+    :defer t
+    :init (add-hook 'enh-ruby-mode-hook 'rubocop-mode)
+    :config
+    (progn
+      (evil-leader/set-key-for-mode 'enh-ruby-mode "mrap" 'rubocop-check-project)
+      (evil-leader/set-key-for-mode 'enh-ruby-mode "mrad" 'rubocop-check-directory)
+      (evil-leader/set-key-for-mode 'enh-ruby-mode "mraf" 'rubocop-check-current-file)
+      (evil-leader/set-key-for-mode 'enh-ruby-mode "mraD" 'rubocop-autocorrect-directory)
+      (evil-leader/set-key-for-mode 'enh-ruby-mode "mraP" 'rubocop-autocorrect-project)
+      (evil-leader/set-key-for-mode 'enh-ruby-mode "mraF" 'rubocop-autocorrect-current-file)
+      )))
+
 (when (configuration-layer/layer-usedp 'auto-completion)
   (defun ruby/post-init-company ()
     (spacemacs|add-company-hook enh-ruby-mode)