Update the maven sync worker

It will now treat the 'non existing versionless package' situation as a
normal one and will not raise a sync error.

app/services/packages/maven/metadata/sync_service.rb

@@ -13,16 +13,20 @@ module Packages
         def execute
           return error('Blank package name') unless package_name
           return error('Not allowed') unless Ability.allowed?(current_user, :destroy_package, project)
-          return error('Non existing versionless package') unless versionless_package_for_versions
-          return error('Non existing metadata file for versions') unless metadata_package_file_for_versions
 
+          result = success('Non existing versionless package(s). Nothing to do.')
+
+          # update versionless package for plugins if it exists
           if metadata_package_file_for_plugins
             result = update_plugins_xml
 
             return result if result.error?
           end
 
-          update_versions_xml
+          # update versionless_package for versions if it exists
+          return update_versions_xml if metadata_package_file_for_versions
+
+          result
         end
 
         private
@@ -79,6 +83,9 @@ module Packages
 
         def metadata_package_file_for_plugins
           strong_memoize(:metadata_package_file_for_plugins) do
+            pkg_name = package_name_for_plugins
+            next unless pkg_name
+
             metadata_package_file_for(versionless_package_named(package_name_for_plugins))
           end
         end
@@ -106,6 +113,8 @@ module Packages
         end
 
         def package_name_for_plugins
+          return unless versionless_package_for_versions
+
           group = versionless_package_for_versions.maven_metadatum.app_group
           group.tr('.', '/')
         end

changelogs/unreleased/324288-support-versionless-package-in-maven-sync-worker.yml

+---
+title: Fix the Maven sync worker to not fail if the versionless package is not found
+merge_request: 56514
+author:
+type: fixed

spec/services/packages/maven/metadata/sync_service_spec.rb

@@ -131,7 +131,7 @@ RSpec.describe ::Packages::Maven::Metadata::SyncService do
             expect(::Packages::Maven::Metadata::CreateVersionsXmlService).not_to receive(:new)
           end
 
-          it_behaves_like 'returning an error service response', message: 'Non existing versionless package'
+          it_behaves_like 'returning a success service response', message: 'Non existing versionless package(s). Nothing to do.'
         end
 
         context 'without a metadata package file for versions' do
@@ -141,7 +141,7 @@ RSpec.describe ::Packages::Maven::Metadata::SyncService do
             expect(::Packages::Maven::Metadata::CreateVersionsXmlService).not_to receive(:new)
           end
 
-          it_behaves_like 'returning an error service response', message: 'Non existing metadata file for versions'
+          it_behaves_like 'returning a success service response', message: 'Non existing versionless package(s). Nothing to do.'
         end
 
         context 'without a project' do
@@ -205,7 +205,7 @@ RSpec.describe ::Packages::Maven::Metadata::SyncService do
             it_behaves_like 'returning a success service response', message: 'Versionless package for versions destroyed'
           end
 
-          context 'with a too big maven metadata file for versions' do
+          context 'with a too big maven metadata file for plugins' do
             before do
               metadata_file_for_plugins.update!(size: 100.megabytes)
             end
@@ -244,6 +244,15 @@ RSpec.describe ::Packages::Maven::Metadata::SyncService do
             it_behaves_like 'returning a success service response', message: 'New metadata package files created'
           end
 
+          context 'without a versionless package for versions' do
+            before do
+              versionless_package_for_versions.package_files.update_all(file_name: 'test.txt')
+              expect(::Packages::Maven::Metadata::CreateVersionsXmlService).not_to receive(:new)
+            end
+
+            it_behaves_like 'returning a success service response', message: 'No changes for plugins xml'
+          end
+
           context 'without a metadata package file for plugins' do
             before do
               versionless_package_for_plugins.package_files.update_all(file_name: 'test.txt')

spec/workers/packages/maven/metadata/sync_worker_spec.rb

@@ -61,9 +61,10 @@ RSpec.describe Packages::Maven::Metadata::SyncWorker, type: :worker do
           let(:project) { create(:project) }
 
           it 'does not create the updated metadata files' do
+            expect(worker).to receive(:log_extra_metadata_on_done).with(:message, 'Non existing versionless package(s). Nothing to do.')
+
             expect { subject }
               .to change { ::Packages::PackageFile.count }.by(0)
-              .and raise_error(described_class::SyncError, 'Non existing versionless package')
           end
         end
 
@@ -146,9 +147,10 @@ RSpec.describe Packages::Maven::Metadata::SyncWorker, type: :worker do
           let(:project) { create(:project) }
 
           it 'does not create the updated metadata files' do
+            expect(worker).to receive(:log_extra_metadata_on_done).with(:message, 'Non existing versionless package(s). Nothing to do.')
+
             expect { subject }
               .to change { ::Packages::PackageFile.count }.by(0)
-              .and raise_error(described_class::SyncError, 'Non existing versionless package')
           end
         end