Add an exact_name param to the GroupPackagesFinder

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/333790

app/finders/concerns/packages/finder_helper.rb

@@ -54,6 +54,12 @@ module Packages
       packages.search_by_name(params[:package_name])
     end
 
+    def filter_by_exact_package_name(packages)
+      return packages unless params[:package_name].present?
+
+      packages.with_name(params[:package_name])
+    end
+
     def filter_by_package_version(packages)
       return packages unless params[:package_version].present?
 

app/finders/packages/group_packages_finder.rb

@@ -4,7 +4,7 @@ module Packages
   class GroupPackagesFinder
     include ::Packages::FinderHelper
 
-    def initialize(current_user, group, params = { exclude_subgroups: false, order_by: 'created_at', sort: 'asc' })
+    def initialize(current_user, group, params = { exclude_subgroups: false, exact_name: false, order_by: 'created_at', sort: 'asc' })
       @current_user = current_user
       @group = group
       @params = params
@@ -30,7 +30,7 @@ module Packages
 
       packages = filter_with_version(packages)
       packages = filter_by_package_type(packages)
-      packages = filter_by_package_name(packages)
+      packages = (params[:exact_name] ? filter_by_exact_package_name(packages) : filter_by_package_name(packages))
       packages = filter_by_package_version(packages)
       installable_only ? packages.installable : filter_by_status(packages)
     end

spec/finders/packages/group_packages_finder_spec.rb

@@ -147,6 +147,19 @@ RSpec.describe Packages::GroupPackagesFinder do
         end
       end
 
+      context 'with exact package_name' do
+        let_it_be(:named_package) { create(:maven_package, project: project, name: 'maven') }
+        let_it_be(:other_package) { create(:maven_package, project: project, name: 'maventoo') }
+
+        let(:params) { { exact_name: true, package_name: package_name } }
+
+        context 'as complete name' do
+          let(:package_name) { 'maven' }
+
+          it { is_expected.to match_array([named_package]) }
+        end
+      end
+
       it_behaves_like 'concerning versionless param'
       it_behaves_like 'concerning package statuses'
     end