Enable frozen string in app/serializers/**/*.rb

Partially addresses #47424.

app/serializers/analytics_build_entity.rb

+# frozen_string_literal: true
+
 class AnalyticsBuildEntity < Grape::Entity
   include RequestAwareEntity
   include EntityDateHelper

app/serializers/analytics_build_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsBuildSerializer < BaseSerializer
   entity AnalyticsBuildEntity
 end

app/serializers/analytics_commit_entity.rb

+# frozen_string_literal: true
+
 class AnalyticsCommitEntity < CommitEntity
   include EntityDateHelper
 

app/serializers/analytics_commit_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsCommitSerializer < BaseSerializer
   entity AnalyticsCommitEntity
 end

app/serializers/analytics_generic_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsGenericSerializer < BaseSerializer
   def represent(resource, opts = {})
     resource.symbolize_keys!

app/serializers/analytics_issue_entity.rb

+# frozen_string_literal: true
+
 class AnalyticsIssueEntity < Grape::Entity
   include RequestAwareEntity
   include EntityDateHelper

app/serializers/analytics_issue_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsIssueSerializer < AnalyticsGenericSerializer
   entity AnalyticsIssueEntity
 end

app/serializers/analytics_merge_request_entity.rb

+# frozen_string_literal: true
+
 class AnalyticsMergeRequestEntity < AnalyticsIssueEntity
   expose :state
 

app/serializers/analytics_merge_request_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsMergeRequestSerializer < AnalyticsGenericSerializer
   entity AnalyticsMergeRequestEntity
 end

app/serializers/analytics_stage_entity.rb

+# frozen_string_literal: true
+
 class AnalyticsStageEntity < Grape::Entity
   include EntityDateHelper
 

app/serializers/analytics_stage_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsStageSerializer < BaseSerializer
   entity AnalyticsStageEntity
 end

app/serializers/analytics_summary_entity.rb

+# frozen_string_literal: true
+
 class AnalyticsSummaryEntity < Grape::Entity
   expose :value, safe: true
   expose :title

app/serializers/analytics_summary_serializer.rb

+# frozen_string_literal: true
+
 class AnalyticsSummarySerializer < BaseSerializer
   entity AnalyticsSummaryEntity
 end

app/serializers/award_emoji_entity.rb

+# frozen_string_literal: true
+
 class AwardEmojiEntity < Grape::Entity
   expose :name
   expose :user, using: API::Entities::UserSafe

app/serializers/base_serializer.rb

+# frozen_string_literal: true
+
 class BaseSerializer
   attr_reader :params
 

app/serializers/blob_entity.rb

+# frozen_string_literal: true
+
 class BlobEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/build_action_entity.rb

+# frozen_string_literal: true
+
 class BuildActionEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/build_artifact_entity.rb

+# frozen_string_literal: true
+
 class BuildArtifactEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/build_details_entity.rb

+# frozen_string_literal: true
+
 class BuildDetailsEntity < JobEntity
   expose :coverage, :erased_at, :duration
   expose :tag_list, as: :tags

app/serializers/build_metadata_entity.rb

+# frozen_string_literal: true
+
 class BuildMetadataEntity < Grape::Entity
   expose :timeout_human_readable
   expose :timeout_source do |metadata|

app/serializers/build_serializer.rb

+# frozen_string_literal: true
+
 class BuildSerializer < BaseSerializer
   entity JobEntity
 

app/serializers/cluster_application_entity.rb

+# frozen_string_literal: true
+
 class ClusterApplicationEntity < Grape::Entity
   expose :name
   expose :status_name, as: :status

app/serializers/cluster_entity.rb

+# frozen_string_literal: true
+
 class ClusterEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/cluster_serializer.rb

+# frozen_string_literal: true
+
 class ClusterSerializer < BaseSerializer
   entity ClusterEntity
 

app/serializers/cohort_activity_month_entity.rb

+# frozen_string_literal: true
+
 class CohortActivityMonthEntity < Grape::Entity
   include ActionView::Helpers::NumberHelper
 

app/serializers/cohort_entity.rb

+# frozen_string_literal: true
+
 class CohortEntity < Grape::Entity
   include ActionView::Helpers::NumberHelper
 

app/serializers/cohorts_entity.rb

+# frozen_string_literal: true
+
 class CohortsEntity < Grape::Entity
   expose :months_included
   expose :cohorts, using: CohortEntity

app/serializers/cohorts_serializer.rb

+# frozen_string_literal: true
+
 class CohortsSerializer < AnalyticsGenericSerializer
   entity CohortsEntity
 end

app/serializers/commit_entity.rb

+# frozen_string_literal: true
+
 class CommitEntity < API::Entities::Commit
   include RequestAwareEntity
 

app/serializers/concerns/with_pagination.rb

+# frozen_string_literal: true
+
 module WithPagination
   attr_accessor :paginator
 

app/serializers/container_repositories_serializer.rb

+# frozen_string_literal: true
+
 class ContainerRepositoriesSerializer < BaseSerializer
   entity ContainerRepositoryEntity
 end

app/serializers/container_repository_entity.rb

+# frozen_string_literal: true
+
 class ContainerRepositoryEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/container_tag_entity.rb

+# frozen_string_literal: true
+
 class ContainerTagEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/container_tags_serializer.rb

+# frozen_string_literal: true
+
 class ContainerTagsSerializer < BaseSerializer
   entity ContainerTagEntity
 

app/serializers/deploy_key_entity.rb

+# frozen_string_literal: true
+
 class DeployKeyEntity < Grape::Entity
   expose :id
   expose :user_id

app/serializers/deploy_key_serializer.rb

+# frozen_string_literal: true
+
 class DeployKeySerializer < BaseSerializer
   entity DeployKeyEntity
 end

app/serializers/deploy_keys_project_entity.rb

+# frozen_string_literal: true
+
 class DeployKeysProjectEntity < Grape::Entity
   expose :can_push
   expose :project, using: ProjectEntity

app/serializers/deployment_entity.rb

+# frozen_string_literal: true
+
 class DeploymentEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/deployment_serializer.rb

+# frozen_string_literal: true
+
 class DeploymentSerializer < BaseSerializer
   entity DeploymentEntity
 

app/serializers/diff_file_entity.rb

+# frozen_string_literal: true
+
 class DiffFileEntity < Grape::Entity
   include RequestAwareEntity
   include BlobHelper

app/serializers/diffs_entity.rb

+# frozen_string_literal: true
+
 class DiffsEntity < Grape::Entity
   include DiffHelper
   include RequestAwareEntity

app/serializers/diffs_serializer.rb

+# frozen_string_literal: true
+
 class DiffsSerializer < BaseSerializer
   entity DiffsEntity
 end

app/serializers/discussion_entity.rb

+# frozen_string_literal: true
+
 class DiscussionEntity < Grape::Entity
   include RequestAwareEntity
   include NotesHelper

app/serializers/discussion_serializer.rb

+# frozen_string_literal: true
+
 class DiscussionSerializer < BaseSerializer
   entity DiscussionEntity
 end

app/serializers/entity_date_helper.rb

+# frozen_string_literal: true
+
 module EntityDateHelper
   include ActionView::Helpers::DateHelper
   include ActionView::Helpers::TagHelper
@@ -50,15 +52,20 @@ module EntityDateHelper
     elsif entity.due_date
       is_upcoming = (entity.due_date - Date.today).to_i > 0
       time_ago = time_ago_in_words(entity.due_date)
-      content = time_ago.gsub(/\d+/) { |match| "<strong>#{match}</strong>" }
-      content.slice!("about ")
-      content << " " + (is_upcoming ? _("remaining") : _("ago"))
-      content.html_safe
+
+      # https://gitlab.com/gitlab-org/gitlab-ce/issues/49440
+      #
+      # Need to improve the i18n here and do a full translation
+      # of the string instead of piecewise translations.
+      content = time_ago
+        .gsub(/\d+/) { |match| "<strong>#{match}</strong>" }
+        .remove("about ")
+      remaining_or_ago = is_upcoming ? _("remaining") : _("ago")
+
+      "#{content} #{remaining_or_ago}".html_safe
     elsif entity.start_date && entity.start_date.past?
-      days    = entity.elapsed_days
-      content = content_tag(:strong, days)
-      content << " #{'day'.pluralize(days)} elapsed"
-      content.html_safe
+      days = entity.elapsed_days
+      "#{content_tag(:strong, days)} #{'day'.pluralize(days)} elapsed".html_safe
     end
   end
 end

app/serializers/entity_request.rb

+# frozen_string_literal: true
+
 class EntityRequest
   # We use EntityRequest object to collect parameters and variables
   # from the controller. Because options that are being passed to the entity

app/serializers/environment_entity.rb

+# frozen_string_literal: true
+
 class EnvironmentEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/environment_serializer.rb

+# frozen_string_literal: true
+
 class EnvironmentSerializer < BaseSerializer
   include WithPagination
 

app/serializers/group_child_entity.rb

+# frozen_string_literal: true
+
 class GroupChildEntity < Grape::Entity
   include ActionView::Helpers::NumberHelper
   include RequestAwareEntity

app/serializers/group_child_serializer.rb

+# frozen_string_literal: true
+
 class GroupChildSerializer < BaseSerializer
   include WithPagination
 

app/serializers/group_entity.rb

+# frozen_string_literal: true
+
 class GroupEntity < Grape::Entity
   include ActionView::Helpers::NumberHelper
   include RequestAwareEntity

app/serializers/group_serializer.rb

+# frozen_string_literal: true
+
 class GroupSerializer < BaseSerializer
   include WithPagination
 

app/serializers/group_variable_entity.rb

+# frozen_string_literal: true
+
 class GroupVariableEntity < Grape::Entity
   expose :id
   expose :key

app/serializers/group_variable_serializer.rb

+# frozen_string_literal: true
+
 class GroupVariableSerializer < BaseSerializer
   entity GroupVariableEntity
 end

app/serializers/issuable_entity.rb

+# frozen_string_literal: true
+
 class IssuableEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/issuable_sidebar_entity.rb

+# frozen_string_literal: true
+
 class IssuableSidebarEntity < Grape::Entity
   include TimeTrackableEntity
   include RequestAwareEntity

app/serializers/issue_entity.rb

+# frozen_string_literal: true
+
 class IssueEntity < IssuableEntity
   include TimeTrackableEntity
 

app/serializers/issue_serializer.rb

+# frozen_string_literal: true
+
 class IssueSerializer < BaseSerializer
   # This overrided method takes care of which entity should be used
   # to serialize the `issue` based on `basic` key in `opts` param.

app/serializers/issue_sidebar_entity.rb

+# frozen_string_literal: true
+
 class IssueSidebarEntity < IssuableSidebarEntity
   expose :assignees, using: API::Entities::UserBasic
 end

app/serializers/job_entity.rb

+# frozen_string_literal: true
+
 class JobEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/job_group_entity.rb

+# frozen_string_literal: true
+
 class JobGroupEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/label_entity.rb

+# frozen_string_literal: true
+
 class LabelEntity < Grape::Entity
   expose :id, if: ->(label, _) { !label.is_a?(GlobalLabel) }
 

app/serializers/label_serializer.rb

+# frozen_string_literal: true
+
 class LabelSerializer < BaseSerializer
   entity LabelEntity
 

app/serializers/lfs_file_lock_entity.rb

+# frozen_string_literal: true
+
 class LfsFileLockEntity < Grape::Entity
   root 'locks', 'lock'
 

app/serializers/lfs_file_lock_serializer.rb

+# frozen_string_literal: true
+
 class LfsFileLockSerializer < BaseSerializer
   entity LfsFileLockEntity
 end

app/serializers/merge_request_basic_entity.rb

+# frozen_string_literal: true
+
 class MergeRequestBasicEntity < IssuableSidebarEntity
   expose :assignee_id
   expose :merge_status

app/serializers/merge_request_basic_serializer.rb

+# frozen_string_literal: true
+
 class MergeRequestBasicSerializer < BaseSerializer
   entity MergeRequestBasicEntity
 end

app/serializers/merge_request_create_entity.rb

+# frozen_string_literal: true
+
 class MergeRequestCreateEntity < Grape::Entity
   expose :iid
 

app/serializers/merge_request_create_serializer.rb

+# frozen_string_literal: true
+
 class MergeRequestCreateSerializer < BaseSerializer
   entity MergeRequestCreateEntity
 end

app/serializers/merge_request_diff_entity.rb

+# frozen_string_literal: true
+
 class MergeRequestDiffEntity < Grape::Entity
   include Gitlab::Routing
   include GitHelper

app/serializers/merge_request_metrics_entity.rb

+# frozen_string_literal: true
+
 class MergeRequestMetricsEntity < Grape::Entity
   expose :latest_closed_at, as: :closed_at
   expose :merged_at

app/serializers/merge_request_serializer.rb

+# frozen_string_literal: true
+
 class MergeRequestSerializer < BaseSerializer
   # This overrided method takes care of which entity should be used
   # to serialize the `merge_request` based on `serializer` key in `opts` param.

app/serializers/merge_request_user_entity.rb

+# frozen_string_literal: true
+
 class MergeRequestUserEntity < UserEntity
   include RequestAwareEntity
   include BlobHelper

app/serializers/merge_request_widget_entity.rb

+# frozen_string_literal: true
+
 class MergeRequestWidgetEntity < IssuableEntity
   expose :state
   expose :in_progress_merge_commit_sha

app/serializers/note_attachment_entity.rb

+# frozen_string_literal: true
+
 class NoteAttachmentEntity < Grape::Entity
   expose :url
   expose :filename

app/serializers/note_entity.rb

+# frozen_string_literal: true
+
 class NoteEntity < API::Entities::Note
   include RequestAwareEntity
   include NotesHelper

app/serializers/note_user_entity.rb

+# frozen_string_literal: true
+
 class NoteUserEntity < UserEntity
   unexpose :web_url
 end

app/serializers/pipeline_details_entity.rb

+# frozen_string_literal: true
+
 class PipelineDetailsEntity < PipelineEntity
   expose :details do
     expose :ordered_stages, as: :stages, using: StageEntity

app/serializers/pipeline_entity.rb

+# frozen_string_literal: true
+
 class PipelineEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/pipeline_serializer.rb

+# frozen_string_literal: true
+
 class PipelineSerializer < BaseSerializer
   include WithPagination
   entity PipelineDetailsEntity

app/serializers/project_entity.rb

+# frozen_string_literal: true
+
 class ProjectEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/project_mirror_entity.rb

+# frozen_string_literal: true
+
 class ProjectMirrorEntity < Grape::Entity
   expose :id
 

app/serializers/project_note_entity.rb

+# frozen_string_literal: true
+
 class ProjectNoteEntity < NoteEntity
   expose :human_access do |note|
     note.project.team.human_max_access(note.author_id)

app/serializers/project_note_serializer.rb

+# frozen_string_literal: true
+
 class ProjectNoteSerializer < BaseSerializer
   entity ProjectNoteEntity
 end

app/serializers/project_serializer.rb

+# frozen_string_literal: true
+
 class ProjectSerializer < BaseSerializer
   entity ProjectEntity
 end

app/serializers/request_aware_entity.rb

+# frozen_string_literal: true
+
 module RequestAwareEntity
   extend ActiveSupport::Concern
 

app/serializers/runner_entity.rb

+# frozen_string_literal: true
+
 class RunnerEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/stage_entity.rb

+# frozen_string_literal: true
+
 class StageEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/stage_serializer.rb

+# frozen_string_literal: true
+
 class StageSerializer < BaseSerializer
   include WithPagination
 

app/serializers/status_entity.rb

+# frozen_string_literal: true
+
 class StatusEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/submodule_entity.rb

+# frozen_string_literal: true
+
 class SubmoduleEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/time_trackable_entity.rb

+# frozen_string_literal: true
+
 module TimeTrackableEntity
   extend ActiveSupport::Concern
   extend Grape

app/serializers/tree_entity.rb

+# frozen_string_literal: true
+
 class TreeEntity < Grape::Entity
   include RequestAwareEntity
 

app/serializers/tree_root_entity.rb

+# frozen_string_literal: true
+
 # TODO: Inherit from TreeEntity, when `Tree` implements `id` and `name` like `Gitlab::Git::Tree`.
 class TreeRootEntity < Grape::Entity
   include RequestAwareEntity

app/serializers/tree_serializer.rb

+# frozen_string_literal: true
+
 class TreeSerializer < BaseSerializer
   entity TreeRootEntity
 end

app/serializers/user_entity.rb

+# frozen_string_literal: true
+
 class UserEntity < API::Entities::UserBasic
   include RequestAwareEntity
 

app/serializers/user_serializer.rb

+# frozen_string_literal: true
+
 class UserSerializer < BaseSerializer
   entity UserEntity
 end

app/serializers/variable_entity.rb

+# frozen_string_literal: true
+
 class VariableEntity < Grape::Entity
   expose :id
   expose :key

app/serializers/variable_serializer.rb

+# frozen_string_literal: true
+
 class VariableSerializer < BaseSerializer
   entity VariableEntity
 end

changelogs/unreleased/frozen-string-enable-app-serializers.yml

+---
+title: Enable frozen string in app/serializers/**/*.rb
+merge_request: 20726
+author: gfyoung
+type: performance