Adding Webpacker as a dependency for Rails 6.0.z builds

Gemfile

@@ -36,6 +36,7 @@ else
   case ENV['RAILS_VERSION']
   when '6.0.0' # This will only be necessary until release 6.0.1 is published
     gem 'sass-rails', '~> 5'
+    gem 'webpacker' # This is necessary or the generator will break
   when /^5\./
     gem 'capybara', '~> 2.18.0'
     gem 'sass-rails', '~> 5'
@@ -47,6 +48,7 @@ else
     gem 'sass-rails', '>= 5.0'
   else
     gem 'sass-rails'
+    gem 'webpacker' # This is necessary or the generator will break
   end
 end
 # END ENGINE_CART BLOCK

spec/test_app_templates/lib/generators/test_app_generator.rb

@@ -28,25 +28,17 @@ def inject_css
   end
 
   def inject_javascript
-    binding.pry
     if Rails.version =~ /^6\./
-      # copy_file 'template/foo', 'app/assets/javascripts.js'
-
-=begin
-      insert_into_file 'app/javascript/packs/application.js', after: 'require("channels")' do
-        %(
-          //= require_tree .
-        )
-      end
-=end
+      copy_file 'app/assets/javascripts/application.js', 'app/assets/javascripts/application.js'
 
+      # Does this means that Webpacker becomes a hard-dependency?
       insert_into_file 'app/assets/config/manifest.js', after: '//= link_directory ../stylesheets .css' do
         %(
           //= link_directory ../javascripts .js
         )
       end
 
-      insert_into_file 'app/views/layouts/application.html.erb', after: "<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>"
+      insert_into_file 'app/views/layouts/application.html.erb', after: "<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>" do
         %(
           <%= javascript_include_tag 'application' %>
         )
@@ -83,10 +75,4 @@ def create_test_route
     copy_file '../support/app/views/file_handler/main.html.erb', 'app/views/file_handler/main.html.erb'
     copy_file '../support/app/views/file_handler/index.html.erb', 'app/views/file_handler/index.html.erb'
   end
-
-  def install_webpacker
-    if Rails.version =~ /^6\./
-      rake 'webpacker:install'
-    end
-  end
 end