Fix the build process for core/non-core gems

Gemfile

@@ -1,7 +1,3 @@
 eval_gemfile('common_spree_dependencies.rb')
 
-gem 'spree_frontend', path: 'frontend'
-gem 'spree_backend', path: 'backend'
-gem 'spree_emails', path: 'emails'
-
 gemspec

backend/Rakefile

@@ -11,5 +11,5 @@ task default: :spec
 desc "Generates a dummy app for testing"
 task :test_app do
   ENV['LIB_NAME'] = 'spree/backend'
-  Rake::Task['common:test_app'].execute( { install_admin: true } )
+  Rake::Task['common:test_app'].execute( { install_admin: true, install_storefront: false } )
 end

bin/build-ci.rb

@@ -22,6 +22,7 @@ def initialize(name)
   end
 
   ALL = %w[api backend core frontend emails sample].map(&method(:new)).freeze
+  CORE_GEMS = %w[api core sample].freeze
 
   # Install subproject
   #
@@ -91,7 +92,13 @@ def bundle_install
   #
   # @return [undefined]
   def setup_test_app
-    system("bundle exec --gemfile=#{ROOT_GEMFILE} rake test_app") || raise('Failed to setup the test app')
+    gemfile_path = if CORE_GEMS.include?(self.name)
+                     ROOT_GEMFILE
+                   else
+                     './Gemfile'
+                   end
+
+    system("bundle exec --gemfile=#{gemfile_path} rake test_app ") || raise('Failed to setup the test app')
   end
 
   # Run tests for subproject

core/lib/generators/spree/dummy/dummy_generator.rb

@@ -137,7 +137,7 @@ def remove_directory_if_exists(path)
     end
 
     def gemfile_path
-      core_gems = ['spree/core', 'spree/api', 'spree/backend', 'spree/frontend', 'spree/sample']
+      core_gems = ['spree/core', 'spree/api', 'spree/sample']
 
       if core_gems.include?(lib_name)
         '../../../../../Gemfile'

core/lib/spree/testing_support/common_rake.rb

@@ -8,7 +8,7 @@
 desc 'Generates a dummy app for testing'
 namespace :common do
   task :test_app, :user_class do |_t, args|
-    args.with_defaults(user_class: 'Spree::LegacyUser', install_storefront: 'false')
+    args.with_defaults(user_class: 'Spree::LegacyUser', install_storefront: 'false', install_admin: 'false')
     require ENV['LIB_NAME'].to_s
 
     ENV['RAILS_ENV'] = 'test'

frontend/Rakefile

@@ -11,5 +11,5 @@ task default: :spec
 desc "Generates a dummy app for testing"
 task :test_app do
   ENV['LIB_NAME'] = 'spree/frontend'
-  Rake::Task['common:test_app'].execute( { install_storefront: true } )
+  Rake::Task['common:test_app'].execute( { install_storefront: true, install_admin: false } )
 end