Remove `redis-namespace` gem (#34742)

Gemfile

@@ -78,7 +78,6 @@ gem 'rack-cors', '~> 2.0', require: 'rack/cors'
 gem 'rails-i18n', '~> 8.0'
 gem 'redcarpet', '~> 3.6'
 gem 'redis', '~> 4.5', require: ['redis', 'redis/connection/hiredis']
-gem 'redis-namespace', '~> 1.10'
 gem 'rqrcode', '~> 3.0'
 gem 'ruby-progressbar', '~> 1.13'
 gem 'sanitize', '~> 7.0'

Gemfile.lock

@@ -696,8 +696,6 @@ GEM
       psych (>= 4.0.0)
     redcarpet (3.6.1)
     redis (4.8.1)
-    redis-namespace (1.11.0)
-      redis (>= 4)
     redlock (1.3.2)
       redis (>= 3.0.0, < 6.0)
     regexp_parser (2.10.0)
@@ -1046,7 +1044,6 @@ DEPENDENCIES
   rdf-normalize (~> 0.5)
   redcarpet (~> 3.6)
   redis (~> 4.5)
-  redis-namespace (~> 1.10)
   rqrcode (~> 3.0)
   rspec-github (~> 3.0)
   rspec-rails (~> 8.0)

app/lib/admin/metrics/dimension/software_versions_dimension.rb

@@ -119,10 +119,6 @@ class Admin::Metrics::Dimension::SoftwareVersionsDimension < Admin::Metrics::Dim
   end
 
   def redis_info
-    @redis_info ||= if redis.is_a?(Redis::Namespace)
-                      redis.redis.info
-                    else
-                      redis.info
-                    end
+    @redis_info ||= redis.info
   end
 end

app/lib/admin/metrics/dimension/space_usage_dimension.rb

@@ -58,11 +58,7 @@ class Admin::Metrics::Dimension::SpaceUsageDimension < Admin::Metrics::Dimension
   end
 
   def redis_info
-    @redis_info ||= if redis.is_a?(Redis::Namespace)
-                      redis.redis.info
-                    else
-                      redis.info
-                    end
+    @redis_info ||= redis.info
   end
 
   def search_size

app/lib/redis_connection.rb

@@ -29,12 +29,7 @@ class RedisConnection
   end
 
   def connection
-    namespace = config[:namespace]
-    if namespace.present?
-      Redis::Namespace.new(namespace, redis: raw_connection)
-    else
-      raw_connection
-    end
+    raw_connection
   end
 
   private

config/application.rb

@@ -24,7 +24,6 @@ Bundler.require(*Rails.groups)
 
 require_relative '../lib/exceptions'
 require_relative '../lib/sanitize_ext/sanitize_config'
-require_relative '../lib/redis/namespace_extensions'
 require_relative '../lib/paperclip/url_generator_extensions'
 require_relative '../lib/paperclip/attachment_extensions'
 

lib/redis/namespace_extensions.rb

@@ -1,16 +0,0 @@
-# frozen_string_literal: true
-
-class Redis
-  module NamespaceExtensions
-    def exists?(...)
-      call_with_namespace('exists?', ...)
-    end
-
-    def with
-      yield self
-    end
-  end
-end
-
-Redis::Namespace::COMMANDS['exists?'] = [:first]
-Redis::Namespace.prepend(Redis::NamespaceExtensions)

spec/controllers/oauth/authorized_applications_controller_spec.rb

@@ -43,7 +43,7 @@ RSpec.describe Oauth::AuthorizedApplicationsController do
     let!(:application) { Fabricate(:application) }
     let!(:access_token) { Fabricate(:accessible_access_token, application: application, resource_owner_id: user.id) }
     let!(:web_push_subscription) { Fabricate(:web_push_subscription, user: user, access_token: access_token) }
-    let(:redis_pipeline_stub) { instance_double(Redis::Namespace, publish: nil) }
+    let(:redis_pipeline_stub) { instance_double(Redis::PipelinedConnection, publish: nil) }
 
     before do
       sign_in user, scope: :user

spec/models/user_spec.rb

@@ -478,7 +478,7 @@ RSpec.describe User do
     let!(:access_token) { Fabricate(:access_token, resource_owner_id: user.id) }
     let!(:web_push_subscription) { Fabricate(:web_push_subscription, access_token: access_token) }
 
-    let(:redis_pipeline_stub) { instance_double(Redis::Namespace, publish: nil) }
+    let(:redis_pipeline_stub) { instance_double(Redis::PipelinedConnection, publish: nil) }
 
     before { stub_redis }
 

spec/system/settings/applications_spec.rb

@@ -101,7 +101,7 @@ RSpec.describe 'Settings applications page' do
   end
 
   describe 'Destroying an application' do
-    let(:redis_pipeline_stub) { instance_double(Redis::Namespace, publish: nil) }
+    let(:redis_pipeline_stub) { instance_double(Redis::PipelinedConnection, publish: nil) }
     let!(:access_token) { Fabricate(:accessible_access_token, application: application) }
 
     before { stub_redis_pipeline }