Fix runner tags assignment when retrying a job

app/services/ci/retry_build_service.rb

 module Ci
   class RetryBuildService < ::BaseService
-    CLONE_ATTRIBUTES = %i[pipeline project ref tag options commands name
-                          allow_failure stage stage_idx trigger_request
-                          yaml_variables when environment coverage_regex]
-                            .freeze
-
-    REJECT_ATTRIBUTES = %i[id status user token coverage trace runner
-                           artifacts_expire_at artifacts_file
-                           artifacts_metadata artifacts_size
-                           created_at updated_at started_at finished_at
-                           queued_at erased_by erased_at].freeze
-
-    IGNORE_ATTRIBUTES = %i[type lock_version gl_project_id target_url
-                           deploy job_id description].freeze
+    CLONE_ACCESSORS = %i[pipeline project ref tag options commands name
+                         allow_failure stage stage_idx trigger_request
+                         yaml_variables when environment coverage_regex
+                         description tag_list].freeze
+
+    REJECT_ACCESSORS = %i[id status user token coverage trace runner
+                          artifacts_expire_at artifacts_file
+                          artifacts_metadata artifacts_size
+                          created_at updated_at started_at finished_at
+                          queued_at erased_by erased_at].freeze
+
+    IGNORE_ACCESSORS = %i[type lock_version target_url gl_project_id
+                          deploy job_id base_tags commit_id deployments
+                          erased_by_id last_deployment project_id runner_id
+                          tag_taggings taggings tags trigger_request_id
+                          user_id].freeze
     def execute(build)
       reprocess(build).tap do |new_build|
@@ -31,7 +34,7 @@ module Ci
         raise Gitlab::Access::AccessDeniedError
       end
-      attributes = CLONE_ATTRIBUTES.map do |attribute|
+      attributes = CLONE_ACCESSORS.map do |attribute|
         [attribute, build.send(attribute)]
       end

spec/factories/ci/builds.rb

@@ -76,6 +76,10 @@ FactoryGirl.define do
       manual
     end
+    trait :tags do
+      tag_list [:docker, :ruby]
+    end
+
     after(:build) do |build, evaluator|
       build.project = build.pipeline.project
     end

spec/services/ci/retry_build_service_spec.rb

@@ -13,11 +13,11 @@ describe Ci::RetryBuildService, :services do
   shared_examples 'build duplication' do
     let(:build) do
       create(:ci_build, :failed, :artifacts_expired, :erased, :trace,
-             :queued, :coverage, pipeline: pipeline)
+             :queued, :coverage, :tags, pipeline: pipeline)
     end
     describe 'clone attributes' do
-      described_class::CLONE_ATTRIBUTES.each do |attribute|
+      described_class::CLONE_ACCESSORS.each do |attribute|
         it "clones #{attribute} build attribute" do
           expect(new_build.send(attribute)).to eq build.send(attribute)
         end
@@ -25,7 +25,7 @@ describe Ci::RetryBuildService, :services do
     end
     describe 'reject attributes' do
-      described_class::REJECT_ATTRIBUTES.each do |attribute|
+      described_class::REJECT_ACCESSORS.each do |attribute|
         it "does not clone #{attribute} build attribute" do
           expect(new_build.send(attribute)).not_to eq build.send(attribute)
         end
@@ -33,12 +33,23 @@ describe Ci::RetryBuildService, :services do
     end
     it 'has correct number of known attributes' do
-      attributes =
-        described_class::CLONE_ATTRIBUTES +
-        described_class::IGNORE_ATTRIBUTES +
-        described_class::REJECT_ATTRIBUTES
-
-      expect(build.attributes.size).to eq(attributes.size)
+      known_accessors =
+        described_class::CLONE_ACCESSORS +
+        described_class::IGNORE_ACCESSORS +
+        described_class::REJECT_ACCESSORS
+
+      # :tag_list is a special case, this accessor does not exist
+      # in reflected associations, comes from `act_as_taggable` and
+      # we use it to copy tags, instead of reusing tags.
+      #
+      current_accessors =
+        build.attribute_names.map.map(&:to_sym) +
+        build._reflections.map { |assoc| assoc.first.to_sym } +
+        [:tag_list]
+
+      current_accessors.uniq!
+
+      expect(known_accessors).to contain_exactly(*current_accessors)
     end
   end