feat(): add delayed job recipe

closes #32

README.md

@@ -52,6 +52,7 @@ The following optional integrations are added too:
 - [ActiveAdmin](http://activeadmin.info) for admin interfaces.
 - [ActiveAdminAddons](https://github.com/platanus/activeadmin_addons) for some help with ActiveAdmin.
 - [Pundit](https://github.com/elabs/pundit) for role-based authorization.
+- [DelayedJob](https://github.com/collectiveidea/delayed_job) to execute longer tasks in the background.
 
 A few more things are added to the project:
 

lib/potassium/templates/application/assets/README.md.erb

@@ -61,4 +61,7 @@ For managing uploads, this project uses [Paperclip](https://github.com/thoughtbo
 <% end-%>
 ### Admin
 As a way to speed up development of an admin interface, we're using [ActiveAdmin](https://github.com/activeadmin/activeadmin)
-
+<% if selected?(:delayed_job) %>
+### Queue System
+For managing tasks in the background, this project uses [DelayedJob](https://github.com/collectiveidea/delayed_job)
+<% end-%>

lib/potassium/templates/application/recipes/asks/delayed_job.rb

@@ -0,0 +1,2 @@
+use_delayed_job = Ask.confirm "Do you want to use delayed jobs?"
+set(:delayed_job, use_delayed_job)

lib/potassium/templates/application/recipes/delayed_job.rb

@@ -0,0 +1,16 @@
+if selected?(:delayed_job)
+  gather_gem "delayed_job_active_record"
+
+  delayed_job_config = "config.active_job.queue_adapter = :delayed_job"
+  application(delayed_job_config)
+
+  after(:gem_install) do
+    generate "delayed_job:active_record"
+
+    if selected?(:heroku)
+      gsub_file "Procfile", /^.*$/m do |match|
+        "#{match}worker: bundle exec rake jobs:work"
+      end
+    end
+  end
+end

lib/potassium/templates/application/template.rb

@@ -11,6 +11,7 @@
   eval_file "recipes/asks/database.rb"
   eval_file "recipes/asks/devise.rb"
   eval_file "recipes/asks/admin.rb"
+  eval_file "recipes/asks/delayed_job.rb"
   eval_file "recipes/asks/pundit.rb"
   eval_file "recipes/asks/i18n.rb"
   eval_file "recipes/asks/api.rb"
@@ -33,6 +34,7 @@
   eval_file "recipes/devise.rb"
   eval_file "recipes/admin.rb"
   eval_file "recipes/angular_admin.rb"
+  eval_file "recipes/delayed_job.rb"
   eval_file "recipes/pundit.rb"
   eval_file "recipes/testing.rb"
   eval_file "recipes/production.rb"