Moving solidus_sample to be development dependency

Solidus Sample gem includes seed data to setup local development in
an easy way, it includes catalogs for countries, states, products,
taxonomies/taxons and images. This gem itself needs about 10mb of disk
space and most of the times it is only needed in local development
or one time.

Gemfile

@@ -33,6 +33,7 @@ gem 'puma', '< 6', require: false
 gem 'i18n-tasks', '~> 0.9', require: false
 gem 'rspec_junit_formatter', require: false
 gem 'yard', require: false
+gem 'solidus_sample'
 
 # Ensure the requirement is also updated in core/lib/spree/testing_support/factory_bot.rb
 gem 'factory_bot_rails', '>= 4.8', require: false

README.md

@@ -150,6 +150,9 @@ bin/rails db:seed
 bin/rails spree_sample:load
 ```
 
+`solidus_sample` is a development dependency, if you need to run `spree_sample:load`
+in production environments, then you have to add it to your local Gemfile `gem 'solidus_sample'`.
+
 There are also options and rake tasks provided by
 [solidus\_auth\_devise](https://github.com/solidusio/solidus_auth_devise).
 

core/lib/generators/solidus/install/install_generator.rb

@@ -183,6 +183,11 @@ def install_solidus_admin
       generate 'solidus_admin:install'
     end
 
+    def install_solidus_sample
+      say_status :installing, "SolidusSample", :blue
+      bundle_command 'add solidus_sample --group=development'
+    end
+
     def install_subcomponents
       apply_template_for :authentication, @selected_authentication
       apply_template_for :frontend, @selected_frontend

lib/solidus.rb

@@ -3,4 +3,3 @@
 require 'solidus_core'
 require 'solidus_api'
 require 'solidus_backend'
-require 'solidus_sample'

solidus.gemspec

@@ -24,5 +24,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'solidus_api', s.version
   s.add_dependency 'solidus_backend', s.version
   s.add_dependency 'solidus_core', s.version
-  s.add_dependency 'solidus_sample', s.version
+
+  s.add_development_dependency 'solidus_sample', s.version
 end