Refresh the site after updating certain site settings

lib/discourse.rb

@@ -172,6 +172,14 @@ module Discourse
     !!$redis.get(readonly_mode_key)
   end
 
+  def self.request_refresh!
+    # Causes refresh on next click for all clients
+    #
+    # This is better than `MessageBus.publish "/file-change", ["refresh"]` because
+    # it spreads the refreshes out over a time period
+    MessageBus.publish '/global/asset-version', 'clobber'
+  end
+
   def self.git_version
     return $git_version if $git_version
 

lib/site_setting_extension.rb

@@ -42,6 +42,10 @@ module SiteSettingExtension
     @hidden_settings ||= []
   end
 
+  def refresh_settings
+    @refresh_settings ||= []
+  end
+
   def setting(name_arg, default = nil, opts = {})
     name = name_arg.to_sym
     mutex.synchronize do
@@ -55,6 +59,9 @@ module SiteSettingExtension
       if opts[:hidden] == true
         hidden_settings << name
       end
+      if opts[:refresh] == true
+        refresh_settings << name
+      end
       setup_methods(name, current_value)
     end
   end
@@ -204,9 +211,14 @@ module SiteSettingExtension
     defaults.has_key?(name.to_sym) || defaults.has_key?("#{name}?".to_sym)
   end
 
+  def requires_refresh?(name)
+    refresh_settings.include?(name.to_sym)
+  end
+
   def set(name, value)
     if has_setting?(name)
       self.send("#{name}=", value)
+      Discourse.request_refresh! if requires_refresh?(name)
     else
       raise ArgumentError.new("No setting named #{name} exists")
     end