Move tmp directory creation from server to initializer

railties/lib/rails/commands/server.rb

@@ -44,10 +44,6 @@ end
 puts "=> Booting #{ActiveSupport::Inflector.demodulize(server)}"
 puts "=> Rails #{Rails.version} application starting on http://#{options[:Host]}:#{options[:Port]}}"
 
-%w(cache pids sessions sockets).each do |dir_to_make|
-  FileUtils.mkdir_p(File.join(RAILS_ROOT, 'tmp', dir_to_make))
-end
-
 if options[:detach]
   Process.daemon
   pid = "#{RAILS_ROOT}/tmp/pids/server.pid"

railties/lib/rails/initializer.rb

@@ -195,6 +195,13 @@ module Rails
     plugin_loader.add_plugin_load_paths
   end
 
+  # Create tmp directories
+  Initializer.default.add :ensure_tmp_directories_exist do
+    %w(cache pids sessions sockets).each do |dir_to_make|
+      FileUtils.mkdir_p(File.join(configuration.root_path, 'tmp', dir_to_make))
+    end
+  end
+
   # Loads the environment specified by Configuration#environment_path, which
   # is typically one of development, test, or production.
   Initializer.default.add :load_environment do