Better debug info if possible

app/controllers/dunlop/ember/application_controller.rb

@@ -9,22 +9,22 @@ module Dunlop
         app_globals = {}
         if adapter_name = params[:adapter].to_s.scan(/\w+/).first.presence
           return render html: '403 - unauthorized, no adapter engine', status: 403 unless adapter = Panda.adapters[adapter_name]
-          app_index = Rails.root.join("public/adapters/#{adapter.url_name}/app/index.html")
+          @app_index = Rails.root.join("public/adapters/#{adapter.url_name}/app/index.html")
           #app_globals = adapter.settings # load through request instead. More stable then changing environments
           unless Rails.application.config.try(:loose_ember_app_authorization)
             return render html: '403 - unauthorized, no adapter engine permission', status: 403 unless current_user.admin? or can?(:read, adapter.engine)
           end
         else
-          app_index = Rails.root.join('public/app/index.html')
+          @app_index = Rails.root.join('public/app/index.html')
         end
         Rails.logger.info "Loading ember app for path '#/#{params[:rest]}' adapter: '#{params[:adapter].presence || 'main_app'}'"
-        if app_index.exist?
-          index_html = app_index.read.to_s
+        if @app_index.exist?
+          index_html = @app_index.read.to_s
           app_globals[:flash] = flash.to_h if flash.present?
           index_html.sub! 'app_globals={}', "app_globals=#{app_globals.to_json}" if app_globals.present?
           render html: index_html.html_safe
         else
-          render html: "App file <tt>#{app_index}</tt> not found".html_safe
+          render html: "App file <tt>#{@app_index.to_s}</tt> not found".html_safe
         end
       end
 

app/views/dunlop/ember/application/ember_path.html.slim

@@ -1,4 +1,4 @@
 h3
   span Could not find
-  tt= '/app/index.html'
+  tt= @app_index || '/app/index.html'
   span file