Adding rubocop to ruby layer

layers/+lang/ruby/README.org

@@ -11,6 +11,7 @@
  - [[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
 This layer provides support for the Ruby language with [[https://github.com/zenspider/enhanced-ruby-mode][enh-ruby-mode]] and [[https://github.com/dgutov/robe][robe-mode]].
@@ -39,6 +40,7 @@ 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.:
@@ -94,3 +96,11 @@ 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~ | 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 +18,9 @@
         flycheck
         robe
         ruby-test-mode
-        ruby-tools))
+        ruby-tools
+        rubocop
+        ))
 
 (if ruby-enable-enh-ruby-mode
     (add-to-list 'ruby-packages 'enh-ruby-mode)
@@ -157,6 +159,17 @@
         (spacemacs/set-leader-keys-for-major-mode mode "tb" 'ruby-test-run)
         (spacemacs/set-leader-keys-for-major-mode mode "tt" '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 "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 ruby-mode)