Allow multiple use `X_if_ee` on last lines

app/helpers/application_settings_helper.rb

@@ -367,7 +367,7 @@ module ApplicationSettingsHelper
   end
 end
 
-ApplicationSettingsHelper.prepend_if_ee('EE::ApplicationSettingsHelper') # rubocop: disable Cop/InjectEnterpriseEditionModule
+ApplicationSettingsHelper.prepend_if_ee('EE::ApplicationSettingsHelper')
 
 # The methods in `EE::ApplicationSettingsHelper` should be available as both
 # instance and class methods.

app/helpers/auth_helper.rb

@@ -152,7 +152,7 @@ module AuthHelper
   extend self
 end
 
-AuthHelper.prepend_if_ee('EE::AuthHelper') # rubocop: disable Cop/InjectEnterpriseEditionModule
+AuthHelper.prepend_if_ee('EE::AuthHelper')
 
 # The methods added in EE should be available as both class and instance
 # methods, just like the methods provided by `AuthHelper` itself.

app/helpers/projects_helper.rb

 # frozen_string_literal: true
 
 module ProjectsHelper
-  prepend_if_ee('::EE::ProjectsHelper') # rubocop: disable Cop/InjectEnterpriseEditionModule
-
   def project_incident_management_setting
     @project_incident_management_setting ||= @project.incident_management_setting ||
       @project.build_incident_management_setting

app/helpers/services_helper.rb

@@ -101,7 +101,7 @@ module ServicesHelper
   extend self
 end
 
-ServicesHelper.prepend_if_ee('EE::ServicesHelper') # rubocop: disable Cop/InjectEnterpriseEditionModule
+ServicesHelper.prepend_if_ee('EE::ServicesHelper')
 
 # The methods in `EE::ServicesHelper` should be available as both instance and
 # class methods.

app/helpers/system_note_helper.rb

@@ -42,7 +42,7 @@ module SystemNoteHelper
   extend self
 end
 
-SystemNoteHelper.prepend_if_ee('EE::SystemNoteHelper') # rubocop: disable Cop/InjectEnterpriseEditionModule
+SystemNoteHelper.prepend_if_ee('EE::SystemNoteHelper')
 
 # The methods in `EE::SystemNoteHelper` should be available as both instance and
 # class methods.

app/models/concerns/noteable.rb

@@ -150,5 +150,5 @@ end
 
 Noteable.extend(Noteable::ClassMethods)
 
-Noteable::ClassMethods.prepend_if_ee('EE::Noteable::ClassMethods') # rubocop: disable Cop/InjectEnterpriseEditionModule
+Noteable::ClassMethods.prepend_if_ee('EE::Noteable::ClassMethods')
 Noteable.prepend_if_ee('EE::Noteable')

app/models/concerns/protected_ref_access.rb

@@ -50,8 +50,8 @@ module ProtectedRefAccess
   end
 end
 
-ProtectedRefAccess.include_if_ee('EE::ProtectedRefAccess::Scopes') # rubocop: disable Cop/InjectEnterpriseEditionModule
-ProtectedRefAccess.prepend_if_ee('EE::ProtectedRefAccess') # rubocop: disable Cop/InjectEnterpriseEditionModule
+ProtectedRefAccess.include_if_ee('EE::ProtectedRefAccess::Scopes')
+ProtectedRefAccess.prepend_if_ee('EE::ProtectedRefAccess')
 
 # When using `prepend` (or `include` for that matter), the `ClassMethods`
 # constants are not merged. This means that `class_methods` in

changelogs/unreleased/fix-cop-inject-multiple.yml

+---
+title: Allow multiple usage of EE extension/inclusion on last lines
+merge_request: 31183
+author: Rajendra Kadam
+type: fixed

config/initializers/rack_attack_new.rb

@@ -160,5 +160,5 @@ class Rack::Attack
   end
 end
 
-::Rack::Attack.extend_if_ee('::EE::Gitlab::Rack::Attack') # rubocop: disable Cop/InjectEnterpriseEditionModule
+::Rack::Attack.extend_if_ee('::EE::Gitlab::Rack::Attack')
 ::Rack::Attack::Request.prepend_if_ee('::EE::Gitlab::Rack::Attack::Request')

rubocop/cop/inject_enterprise_edition_module.rb

@@ -17,6 +17,8 @@ module RuboCop
       CHECK_LINE_METHODS =
         Set.new(%i[include_if_ee extend_if_ee prepend_if_ee]).freeze
 
+      CHECK_LINE_METHODS_REGEXP = Regexp.union(CHECK_LINE_METHODS.map(&:to_s)).freeze
+
       DISALLOW_METHODS = Set.new(%i[include extend prepend]).freeze
 
       def ee_const?(node)
@@ -48,7 +50,13 @@ module RuboCop
         # the expression is the last line _of code_.
         last_line -= 1 if buffer.source.end_with?("\n")
 
-        add_offense(node, message: INVALID_LINE) if line < last_line
+        last_line_content = buffer.source.split("\n")[-1]
+
+        if CHECK_LINE_METHODS_REGEXP.match?(last_line_content)
+          ignore_node(node)
+        elsif line < last_line
+          add_offense(node, message: INVALID_LINE)
+        end
       end
 
       def verify_argument_type(node)

spec/rubocop/cop/inject_enterprise_edition_module_spec.rb

@@ -159,6 +159,17 @@ describe RuboCop::Cop::InjectEnterpriseEditionModule do
     SOURCE
   end
 
+  it 'does not flag the double use of `X_if_ee` on the last line' do
+    expect_no_offenses(<<~SOURCE)
+    class Foo
+    end
+
+    Foo.extend_if_ee('EE::Foo')
+    Foo.include_if_ee('EE::Foo')
+    Foo.prepend_if_ee('EE::Foo')
+    SOURCE
+  end
+
   it 'autocorrects offenses by just disabling the Cop' do
     source = <<~SOURCE
     class Foo