Check duplicate package regex against version

Namespace package settings checks package version and
name when evaluating the exception regex.

Changelog: fixed

app/models/namespace/package_setting.rb

@@ -22,7 +22,7 @@ class Namespace::PackageSetting < ApplicationRecord
       duplicates_allowed = package.package_settings["#{package.package_type}_duplicates_allowed"]
       regex = ::Gitlab::UntrustedRegexp.new("\\A#{package.package_settings["#{package.package_type}_duplicate_exception_regex"]}\\z")
 
-      duplicates_allowed || regex.match?(package.name)
+      duplicates_allowed || regex.match?(package.name) || regex.match?(package.version)
     end
   end
 end

changelogs/unreleased/321772-version-dupe-check.yml

+---
+title: Check duplicate package regex against version as well as name
+merge_request: 60760
+author:
+type: fixed

doc/user/packages/maven_repository/index.md

@@ -625,7 +625,7 @@ In the UI:
 1. For your group, go to **Settings > Packages & Registries**.
 1. Expand the **Package Registry** section.
 1. Turn on the **Reject duplicates** toggle.
-1. Optional. To allow some duplicate packages, in the **Exceptions** box, enter a regex pattern that matches the names of packages you want to allow.
+1. Optional. To allow some duplicate packages, in the **Exceptions** box, enter a regex pattern that matches the names and/or versions of packages you want to allow.
 
 Your changes are automatically saved.
 

spec/models/namespace/package_setting_spec.rb

@@ -42,7 +42,7 @@ RSpec.describe Namespace::PackageSetting do
     context 'package types with package_settings' do
       # As more package types gain settings they will be added to this list
       [:maven_package].each do |format|
-        let_it_be(:package) { create(format) } # rubocop:disable Rails/SaveBang
+        let_it_be(:package) { create(format, name: 'foo', version: 'beta') } # rubocop:disable Rails/SaveBang
         let_it_be(:package_type) { package.package_type }
         let_it_be(:package_setting) { package.project.namespace.package_settings }
 
@@ -50,6 +50,8 @@ RSpec.describe Namespace::PackageSetting do
           true  | ''   | true
           false | ''   | false
           false | '.*' | true
+          false | 'fo.*' | true
+          false | 'be.*' | true
         end
 
         with_them do

spec/services/packages/maven/find_or_create_package_service_spec.rb

@@ -130,7 +130,15 @@ RSpec.describe Packages::Maven::FindOrCreatePackageService do
 
       context 'when the package name matches the exception regex' do
         before do
-          package_settings.update!(maven_duplicate_exception_regex: '.*')
+          package_settings.update!(maven_duplicate_exception_regex: existing_package.name)
+        end
+
+        it_behaves_like 'reuse existing package'
+      end
+
+      context 'when the package version matches the exception regex' do
+        before do
+          package_settings.update!(maven_duplicate_exception_regex: existing_package.version)
         end
 
         it_behaves_like 'reuse existing package'