Enable even more frozen string for lib/gitlab

Enables frozen string for the following:

* lib/gitlab/hook_data/**/*.rb
* lib/gitlab/i18n/**/*.rb
* lib/gitlab/import/**/*.rb
* lib/gitlab/import_export/**/*.rb
* lib/gitlab/kubernetes/**/*.rb
* lib/gitlab/legacy_github_import/**/*.rb
* lib/gitlab/manifest_import/**/*.rb
* lib/gitlab/metrics/**/*.rb
* lib/gitlab/middleware/**/*.rb

Partially addresses gitlab-org/gitlab-ce#47424.

7 files changed, 16 insertions, 1 deletions

diff --git a/lib/gitlab/middleware/go.rb b/lib/gitlab/middleware/go.rb
index 6943567fb6d..d1a87c3b3bb 100644
--- a/lib/gitlab/middleware/go.rb
+++ b/lib/gitlab/middleware/go.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # A dumb middleware that returns a Go HTML document if the go-get=1 query string
 # is used irrespective if the namespace/project exists
 module Gitlab
diff --git a/lib/gitlab/middleware/multipart.rb b/lib/gitlab/middleware/multipart.rb
index 10cb1e7127e..84c2f0d5720 100644
--- a/lib/gitlab/middleware/multipart.rb
+++ b/lib/gitlab/middleware/multipart.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Gitlab::Middleware::Multipart - a Rack::Multipart replacement
 #
 # Rack::Multipart leaves behind tempfiles in /tmp and uses valuable Ruby
diff --git a/lib/gitlab/middleware/rails_queue_duration.rb b/lib/gitlab/middleware/rails_queue_duration.rb
index bc70b2459ef..96c6a0a7d28 100644
--- a/lib/gitlab/middleware/rails_queue_duration.rb
+++ b/lib/gitlab/middleware/rails_queue_duration.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This Rack middleware is intended to measure the latency between
 # gitlab-workhorse forwarding a request to the Rails application and the
 # time this middleware is reached.
diff --git a/lib/gitlab/middleware/read_only.rb b/lib/gitlab/middleware/read_only.rb
index 7f63e39b3aa..83c52a6c6e0 100644
--- a/lib/gitlab/middleware/read_only.rb
+++ b/lib/gitlab/middleware/read_only.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module Middleware
     class ReadOnly
diff --git a/lib/gitlab/middleware/read_only/controller.rb b/lib/gitlab/middleware/read_only/controller.rb
index 8dca431c005..89941a9efa0 100644
--- a/lib/gitlab/middleware/read_only/controller.rb
+++ b/lib/gitlab/middleware/read_only/controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module Middleware
     class ReadOnly
diff --git a/lib/gitlab/middleware/release_env.rb b/lib/gitlab/middleware/release_env.rb
index bfe8e113b5e..849cf8f759b 100644
--- a/lib/gitlab/middleware/release_env.rb
+++ b/lib/gitlab/middleware/release_env.rb
@@ -1,4 +1,7 @@
-module Gitlab # rubocop:disable Naming/FileName
+# rubocop:disable Naming/FileName
+# frozen_string_literal: true
+
+module Gitlab
   module Middleware
     # Some of middleware would hold env for no good reason even after the
     # request had already been processed, and we could not garbage collect
diff --git a/lib/gitlab/middleware/static.rb b/lib/gitlab/middleware/static.rb
index aa1e9dc0fdb..972fed2134c 100644
--- a/lib/gitlab/middleware/static.rb
+++ b/lib/gitlab/middleware/static.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module Middleware
     class Static < ActionDispatch::Static