Add `rake` package to the ruby layer

layers/+lang/ruby/README.org

@@ -16,12 +16,14 @@
    - [[Tests][Tests]]
      - [[RSpec-mode][RSpec-mode]]
      - [[Ruby-test-mode][Ruby-test-mode]]
+   - [[Rake][Rake]]
 
 * Description
 This layer provides support for the Ruby language with the following feature:
 - version manager (rbenv, rvm or chruby)
 - integration with bundler
 - test runner (ruby-test and rspec)
+- rake runner
 - linter (rubocop)
 - interactive REPL and code navigation (robe)
 
@@ -162,3 +164,11 @@ When =ruby-test-runner= equals =ruby-test=.
 |-------------+---------------------|
 | ~SPC m t b~ | run test file       |
 | ~SPC m t t~ | run test at pointer |
+** Rake
+
+| Key binding | Description                     |
+|-------------+---------------------------------|
+| ~SPC m k k~ | Runs rake                       |
+| ~SPC m k r~ | Re-runs the last rake task      |
+| ~SPC m k R~ | Regenerates the rake cache      |
+| ~SPC m k f~ | Finds definition of a rake task |

layers/+lang/ruby/packages.el

@@ -25,6 +25,7 @@
         ruby-tools
         rvm
         smartparens
+        rake
         ))
 (if ruby-enable-enh-ruby-mode
     (add-to-list 'ruby-packages 'enh-ruby-mode)
@@ -257,3 +258,16 @@
        :post-handlers '(sp-ruby-post-handler
                         (spacemacs/smartparens-pair-newline-and-indent "RET"))
        :suffix ""))))
+
+(defun ruby/init-rake ()
+  (use-package rake
+    :defer t
+    :config
+    (progn
+      (setq rake-cache-file (concat spacemacs-cache-directory "rake.cache"))
+      (dolist (mode '(ruby-mode enh-ruby-mode))
+                (spacemacs/set-leader-keys-for-major-mode mode
+                  "kk"    'rake
+                  "kr"    'rake-rerun
+                  "kR"    'rake-regenerate-cache
+                  "kf"    'rake-find-task)))))