Move Tracing controller into Core

This commit moves the Tracing operations controller
from Ultimate to Core exposing the route to the public
but not linking it yet.

app/controllers/projects/tracings_controller.rb

+# frozen_string_literal: true
+
+module Projects
+  class TracingsController < Projects::ApplicationController
+    content_security_policy do |p|
+      next if p.directives.blank?
+
+      global_frame_src = p.frame_src
+
+      p.frame_src -> { frame_src_csp_policy(global_frame_src) }
+    end
+
+    before_action :authorize_update_environment!
+
+    def show
+    end
+
+    private
+
+    def frame_src_csp_policy(global_frame_src)
+      external_url = @project&.tracing_setting&.external_url
+
+      external_url.presence || global_frame_src
+    end
+  end
+end

config/routes/project.rb

@@ -307,6 +307,8 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
           get 'details', on: :member
         end
 
+        resource :tracing, only: [:show]
+
         post 'incidents/integrations/pagerduty', to: 'incident_management/pager_duty_incidents#create'
 
         resources :incidents, only: [:index]
@@ -551,6 +553,7 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
       Gitlab::Routing.redirect_legacy_paths(self, :mirror, :tags,
                                             :cycle_analytics, :mattermost, :variables, :triggers,
                                             :environments, :protected_environments, :error_tracking, :alert_management,
+                                            :tracing,
                                             :serverless, :clusters, :audit_events, :wikis, :merge_requests,
                                             :vulnerability_feedback, :security, :dependencies, :issues)
     end

ee/app/controllers/projects/tracings_controller.rb

-# frozen_string_literal: true
-
-class Projects::TracingsController < Projects::ApplicationController
-  content_security_policy do |p|
-    next if p.directives.blank?
-
-    global_frame_src = p.frame_src
-
-    p.frame_src -> { frame_src_csp_policy(global_frame_src) }
-  end
-
-  before_action :check_license
-  before_action :authorize_update_environment!
-
-  def show
-  end
-
-  private
-
-  def check_license
-    render_404 unless @project.feature_available?(:tracing, current_user)
-  end
-
-  def frame_src_csp_policy(global_frame_src)
-    external_url = @project&.tracing_setting&.external_url
-
-    external_url.presence || global_frame_src
-  end
-end

ee/config/routes/project.rb

@@ -127,8 +127,6 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
         end
       end
 
-      resource :tracing, only: [:show]
-
       post '/restore' => '/projects#restore', as: :restore
 
       resource :insights, only: [:show], trailing_slash: true do

ee/spec/views/projects/tracing/show.html.haml_spec.rb → spec/views/projects/tracing/show.html.haml_spec.rb

@@ -3,21 +3,18 @@
 require 'spec_helper'
 
 RSpec.describe 'projects/tracings/show' do
-  let(:project) { create(:project, :repository) }
-  let(:error_tracking_setting) { create(:project_error_tracking_setting, project: project) }
+  let_it_be_with_reload(:project) { create(:project) }
+  let_it_be(:error_tracking_setting) { create(:project_error_tracking_setting, project: project) }
 
   before do
     assign(:project, project)
-    assign(:repository, project.repository)
-    allow(view).to receive(:current_ref).and_return('master')
-    allow(view).to receive(:error_tracking_setting).and_return(error_tracking_setting)
-    allow(view).to receive(:incident_management_available?) { false }
-    stub_licensed_features(tracing: true)
+    allow(view).to receive(:error_tracking_setting)
+      .and_return(error_tracking_setting)
   end
 
   context 'with project.tracing_external_url' do
-    let(:tracing_url) { 'https://tracing.url' }
-    let(:tracing_setting) { create(:project_tracing_setting, project: project, external_url: tracing_url) }
+    let_it_be(:tracing_url) { 'https://tracing.url' }
+    let_it_be(:tracing_setting) { create(:project_tracing_setting, project: project, external_url: tracing_url) }
 
     before do
       allow(view).to receive(:can?).and_return(true)