Extract EE::API::JobArtifacts

ee/lib/ee/api/job_artifacts.rb

+module EE
+  module API
+    module JobArtifacts
+      def self.prepended(api)
+        api.module_eval do
+          helpers do
+            def authorize_download_artifacts!
+              super
+              check_cross_project_pipelines_feature!
+            end
+
+            def check_cross_project_pipelines_feature!
+              if job_token_authentication? && !@project.feature_available?(:cross_project_pipelines)
+                not_found!('Project')
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end

lib/api/job_artifacts.rb

@@ -2,6 +2,15 @@ module API
   class JobArtifacts < Grape::API
     before { authenticate_non_get! }
 
+    # EE::API::JobArtifacts would override the following helpers
+    helpers do
+      def authorize_download_artifacts!
+        authorize_read_builds!
+      end
+    end
+
+    prepend EE::API::JobArtifacts
+
     params do
       requires :id, type: String, desc: 'The ID of a project'
     end
@@ -16,8 +25,7 @@ module API
       route_setting :authentication, job_token_allowed: true
       get ':id/jobs/artifacts/:ref_name/download',
         requirements: { ref_name: /.+/ } do
-        authorize_read_builds!
-        check_cross_project_pipelines_feature!
+        authorize_download_artifacts!
 
         builds = user_project.latest_successful_builds_for(params[:ref_name])
         latest_build = builds.find_by!(name: params[:job])
@@ -33,8 +41,7 @@ module API
       end
       route_setting :authentication, job_token_allowed: true
       get ':id/jobs/:job_id/artifacts' do
-        authorize_read_builds!
-        check_cross_project_pipelines_feature!
+        authorize_download_artifacts!
 
         build = find_build!(params[:job_id])
 
@@ -80,13 +87,5 @@ module API
         present build, with: Entities::Job
       end
     end
-
-    helpers do
-      def check_cross_project_pipelines_feature!
-        if job_token_authentication? && !@project.feature_available?(:cross_project_pipelines)
-          not_found!('Project')
-        end
-      end
-    end
   end
 end