Enable frozen string for lib/gitlab/*.rb

changelogs/unreleased/frozen-string-enable-lib-gitlab.yml

+---
+title: Enable frozen string for lib/gitlab/*.rb
+merge_request:
+author: gfyoung
+type: performance

lib/backup/manager.rb

@@ -164,7 +164,7 @@ module Backup
     def tar_version
       tar_version, _ = Gitlab::Popen.popen(%w(tar --version))
-      tar_version.force_encoding('locale').split("\n").first
+      tar_version.dup.force_encoding('locale').split("\n").first
     end
     def skipped?(item)

lib/gitlab/access.rb

+# frozen_string_literal: true
+
 # Gitlab::Access module
 #
 # Define allowed roles that can be used

lib/gitlab/action_rate_limiter.rb

+# frozen_string_literal: true
+
 module Gitlab
   # This class implements a simple rate limiter that can be used to throttle
   # certain actions. Unlike Rack Attack and Rack::Throttle, which operate at

lib/gitlab/allowable.rb

+# frozen_string_literal: true
+
 module Gitlab
   module Allowable
     def can?(*args)

lib/gitlab/app_logger.rb

+# frozen_string_literal: true
+
 module Gitlab
   class AppLogger < Gitlab::Logger
     def self.file_name_noext

lib/gitlab/asciidoc.rb

+# frozen_string_literal: true
+
 require 'asciidoctor'
 require 'asciidoctor/converter/html5'
 require "asciidoctor-plantuml"

lib/gitlab/auth.rb

+# frozen_string_literal: true
+
 module Gitlab
   module Auth
     MissingPersonalAccessTokenError = Class.new(StandardError)

lib/gitlab/background_migration.rb

+# frozen_string_literal: true
+
 module Gitlab
   module BackgroundMigration
     def self.queue

lib/gitlab/base_doorkeeper_controller.rb

+# frozen_string_literal: true
+
 # This is a base controller for doorkeeper.
 # It adds the `can?` helper used in the views.
 module Gitlab

lib/gitlab/blame.rb

+# frozen_string_literal: true
+
 module Gitlab
   class Blame
     attr_accessor :blob, :commit

lib/gitlab/blob_helper.rb

+# frozen_string_literal: true
+
 # This has been extracted from https://github.com/github/linguist/blob/master/lib/linguist/blob_helper.rb
 module Gitlab
   module BlobHelper

lib/gitlab/build_access.rb

+# frozen_string_literal: true
+
 module Gitlab
   class BuildAccess < UserAccess
     attr_accessor :user, :project

lib/gitlab/changes_list.rb

+# frozen_string_literal: true
+
 module Gitlab
   class ChangesList
     include Enumerable

lib/gitlab/chat_name_token.rb

+# frozen_string_literal: true
+
 require 'json'
 module Gitlab

lib/gitlab/ci_access.rb

+# frozen_string_literal: true
+
 module Gitlab
   # For backwards compatibility, generic CI (which is a build without a user) is
   # allowed to :build_download_code without any other checks.

lib/gitlab/closing_issue_extractor.rb

+# frozen_string_literal: true
+
 module Gitlab
   class ClosingIssueExtractor
     ISSUE_CLOSING_REGEX = begin

lib/gitlab/color_schemes.rb

+# frozen_string_literal: true
+
 module Gitlab
   # Module containing GitLab's syntax color scheme definitions and helper
   # methods for accessing them.

lib/gitlab/config_helper.rb

+# frozen_string_literal: true
+
 module Gitlab::ConfigHelper
   def gitlab_config_features
     Gitlab.config.gitlab.default_projects_features

lib/gitlab/contributions_calendar.rb

+# frozen_string_literal: true
+
 module Gitlab
   class ContributionsCalendar
     attr_reader :contributor