Allow multiple prepends if they're all at the end

app/services/projects/create_service.rb

@@ -249,9 +249,7 @@ module Projects
   end
 end
 
-# rubocop: disable Cop/InjectEnterpriseEditionModule
 Projects::CreateService.prepend_if_ee('EE::Projects::CreateService')
-# rubocop: enable Cop/InjectEnterpriseEditionModule
 
 # Measurable should be at the bottom of the ancestor chain, so it will measure execution of EE::Projects::CreateService as well
 Projects::CreateService.prepend(Measurable)

app/services/projects/import_service.rb

@@ -149,9 +149,7 @@ module Projects
   end
 end
 
-# rubocop: disable Cop/InjectEnterpriseEditionModule
 Projects::ImportService.prepend_if_ee('EE::Projects::ImportService')
-# rubocop: enable Cop/InjectEnterpriseEditionModule
 
 # Measurable should be at the bottom of the ancestor chain, so it will measure execution of EE::Projects::ImportService as well
 Projects::ImportService.prepend(Measurable)

rubocop/cop/inject_enterprise_edition_module.rb

@@ -3,8 +3,7 @@
 module RuboCop
   module Cop
     # Cop that blacklists the injecting of EE specific modules anywhere but on
-    # the last line of a file. Injecting a module in the middle of a file will
-    # cause merge conflicts, while placing it on the last line will not.
+    # the last line of a file. It allows multiple EE injections as long as they're all at the end.
     class InjectEnterpriseEditionModule < RuboCop::Cop::Cop
       INVALID_LINE = 'Injecting EE modules must be done on the last line of this file' \
           ', outside of any class or module definitions'
@@ -17,10 +16,10 @@ 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
 
+      CHECK_LINE_METHODS_REGEXP = Regexp.union((CHECK_LINE_METHODS + DISALLOW_METHODS).map(&:to_s) + [/^\s*(#.*|$)/]).freeze
+
       def ee_const?(node)
         line = node.location.expression.source_line
 
@@ -45,14 +44,18 @@ module RuboCop
         buffer = node.location.expression.source_buffer
         last_line = buffer.last_line
 
-        # Parser treats the final newline (if present) as a separate line,
-        # meaning that a simple `line < last_line` would yield true even though
-        # the expression is the last line _of code_.
-        last_line -= 1 if buffer.source.end_with?("\n")
+        # We allow multiple includes, extends and prepends as long as they're all ath the end.
+        allowed_line = true
+        index_line = last_line - line + 1
+        content = buffer.source.split("\n")
 
-        last_line_content = buffer.source.split("\n")[-1]
+        while index_line > 0 && allowed_line
+          line_content = content[-index_line]
+          allowed_line = CHECK_LINE_METHODS_REGEXP.match?(line_content)
+          index_line -= 1
+        end
 
-        if CHECK_LINE_METHODS_REGEXP.match?(last_line_content)
+        if allowed_line
           ignore_node(node)
         elsif line < last_line
           add_offense(node, message: INVALID_LINE)