New performance bar that can be enabled with the `p b` shortcut

Signed-off-by: Rémy Coutable <remy@rymai.me>

1 files changed, 14 insertions, 1 deletions

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 47ce21d238b..01b1462d5ec 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -18,7 +18,7 @@ class ApplicationController < ActionController::Base
   before_action :ldap_security_check
   before_action :sentry_context
   before_action :default_headers
-  before_action :add_gon_variables
+  before_action :add_gon_variables, unless: -> { request.path.start_with?('/peek') }
   before_action :configure_permitted_parameters, if: :devise_controller?
   before_action :require_email, unless: :devise_controller?
 
@@ -63,6 +63,19 @@ class ApplicationController < ActionController::Base
     end
   end
 
+  def peek_enabled?
+    return false unless Gitlab::PerformanceBar.enabled?
+    return false unless current_user
+
+    if RequestStore.active?
+      if RequestStore.store.key?(:peek_enabled)
+        RequestStore.store[:peek_enabled]
+      else
+        RequestStore.store[:peek_enabled] = cookies[:perf_bar_enabled].present?
+      end
+    end
+  end
+
   protected
 
   # This filter handles both private tokens and personal access tokens