Ensure Rails.application is defined, use in preview source feature

Author: boardfish

Rakefile

@@ -95,7 +95,7 @@ namespace :docs do
     require "rails"
     require "action_controller"
     require "view_component"
-    ViewComponent::Base.config.view_component_path = "view_component"
+    ViewComponent::GlobalConfig.view_component_path = "view_component"
     require "view_component/docs_builder_component"
 
     error_keys = registry.keys.select { |key| key.to_s.include?("Error::MESSAGE") }.map(&:to_s)

app/views/view_components/preview.html.erb

@@ -1,5 +1,5 @@
 <% if @render_args[:component] %>
-  <% if ViewComponent::Base.config.render_monkey_patch_enabled || Rails.version.to_f >= 6.1 %>
+  <% if ViewComponent::GlobalConfig.render_monkey_patch_enabled || Rails.version.to_f >= 6.1 %>
     <%= render(@render_args[:component], @render_args[:args], &@render_args[:block]) %>
   <% else %>
     <%= render_component(@render_args[:component], &@render_args[:block]) %>
@@ -8,6 +8,6 @@
   <%= render template: @render_args[:template], locals: @render_args[:locals] || {} %>
 <% end %>
 
-<% if ViewComponent::Base.config.show_previews_source %>
+<% if ViewComponent::GlobalConfig.show_previews_source %>
   <%= preview_source %>
 <% end %>

lib/view_component/global_config.rb

@@ -1,3 +1,3 @@
 module ViewComponent
-  GlobalConfig = defined?(Rails) ? Rails.application.config.view_component : Base.config
+  GlobalConfig = defined?(Rails) && Rails.application ? Rails.application.config.view_component : Base.config
 end