Fix moving local files during namespace transfer

app/models/concerns/storage/legacy_namespace.rb

@@ -27,8 +27,15 @@ module Storage
         end
       end
 
+      if parent_changed?
+        former_parent_full_path = parent_id_was.nil? ? nil : Namespace.find(parent_id_was).full_path
+        parent_full_path = parent&.full_path
+        Gitlab::UploadsTransfer.new.move_namespace(path, former_parent_full_path, parent_full_path)
+        Gitlab::PagesTransfer.new.move_namespace(path, former_parent_full_path, parent_full_path)
+      else
         Gitlab::UploadsTransfer.new.rename_namespace(full_path_was, full_path)
         Gitlab::PagesTransfer.new.rename_namespace(full_path_was, full_path)
+      end
 
       remove_exports!
 

changelogs/unreleased/mk-fix-move-upload-files-on-group-transfer.yml

+---
+title: Fix missing uploads after group transfer
+merge_request: 17658
+author:
+type: fixed

lib/gitlab/project_transfer.rb

 module Gitlab
+  # This class is used to move local, unhashed files owned by projects to their new location
   class ProjectTransfer
-    def move_project(project_path, namespace_path_was, namespace_path)
-      new_namespace_folder = File.join(root_dir, namespace_path)
-      FileUtils.mkdir_p(new_namespace_folder) unless Dir.exist?(new_namespace_folder)
-      from = File.join(root_dir, namespace_path_was, project_path)
-      to = File.join(root_dir, namespace_path, project_path)
+    # nil parent_path (or parent_path_was) represents a root namespace
+    def move_namespace(path, parent_path_was, parent_path)
+      parent_path_was ||= ''
+      parent_path ||= ''
+      new_parent_folder = File.join(root_dir, parent_path)
+      FileUtils.mkdir_p(new_parent_folder)
+      from = File.join(root_dir, parent_path_was, path)
+      to = File.join(root_dir, parent_path, path)
       move(from, to, "")
     end
 
+    alias_method :move_project, :move_namespace
+
     def rename_project(path_was, path, namespace_path)
       base_dir = File.join(root_dir, namespace_path)
       move(path_was, path, base_dir)

spec/lib/gitlab/project_transfer_spec.rb

@@ -29,6 +29,41 @@ describe Gitlab::ProjectTransfer do
     end
   end
 
+  describe '#move_namespace' do
+    context 'when moving namespace from root into another namespace' do
+      it "moves namespace projects' upload" do
+        child_namespace = 'test_child_namespace'
+        FileUtils.mkdir_p(File.join(@root_dir, child_namespace, @project_path))
+        @project_transfer.move_namespace(child_namespace, nil, @namespace_path)
+
+        expected_path = File.join(@root_dir, @namespace_path, child_namespace, @project_path)
+        expect(Dir.exist?(expected_path)).to be_truthy
+      end
+    end
+
+    context 'when moving namespace from one parent to another' do
+      it "moves namespace projects' upload" do
+        child_namespace = 'test_child_namespace'
+        FileUtils.mkdir_p(File.join(@root_dir, @namespace_path_was, child_namespace, @project_path))
+        @project_transfer.move_namespace(child_namespace, @namespace_path_was, @namespace_path)
+
+        expected_path = File.join(@root_dir, @namespace_path, child_namespace, @project_path)
+        expect(Dir.exist?(expected_path)).to be_truthy
+      end
+    end
+
+    context 'when moving namespace from having a parent to root' do
+      it "moves namespace projects' upload" do
+        child_namespace = 'test_child_namespace'
+        FileUtils.mkdir_p(File.join(@root_dir, @namespace_path_was, child_namespace, @project_path))
+        @project_transfer.move_namespace(child_namespace, @namespace_path_was, nil)
+
+        expected_path = File.join(@root_dir, child_namespace, @project_path)
+        expect(Dir.exist?(expected_path)).to be_truthy
+      end
+    end
+  end
+
   describe '#rename_project' do
     it "renames project" do
       FileUtils.mkdir_p(File.join(@root_dir, @namespace_path, @project_path_was))

spec/models/namespace_spec.rb

@@ -206,41 +206,65 @@ describe Namespace do
 
       context 'with subgroups' do
         let(:parent) { create(:group, name: 'parent', path: 'parent') }
+        let(:new_parent) { create(:group, name: 'new_parent', path: 'new_parent') }
         let(:child) { create(:group, name: 'child', path: 'child', parent: parent) }
         let!(:project) { create(:project_empty_repo, :legacy_storage, path: 'the-project', namespace: child, skip_disk_validation: true) }
         let(:uploads_dir) { FileUploader.root }
         let(:pages_dir) { File.join(TestEnv.pages_path) }
 
+        def expect_project_directories_at(namespace_path)
+          expected_repository_path = File.join(TestEnv.repos_path, namespace_path, 'the-project.git')
+          expected_upload_path = File.join(uploads_dir, namespace_path, 'the-project')
+          expected_pages_path = File.join(pages_dir, namespace_path, 'the-project')
+
+          expect(File.directory?(expected_repository_path)).to be(true)
+          expect(File.directory?(expected_upload_path)).to be(true)
+          expect(File.directory?(expected_pages_path)).to be(true)
+        end
+
         before do
+          FileUtils.mkdir_p(File.join(TestEnv.repos_path, "#{project.full_path}.git"))
           FileUtils.mkdir_p(File.join(uploads_dir, project.full_path))
           FileUtils.mkdir_p(File.join(pages_dir, project.full_path))
         end
 
         context 'renaming child' do
           it 'correctly moves the repository, uploads and pages' do
-            expected_repository_path = File.join(TestEnv.repos_path, 'parent', 'renamed', 'the-project.git')
-            expected_upload_path = File.join(uploads_dir, 'parent', 'renamed', 'the-project')
-            expected_pages_path = File.join(pages_dir, 'parent', 'renamed', 'the-project')
-
-            child.update_attributes!(path: 'renamed')
+            child.update!(path: 'renamed')
 
-            expect(File.directory?(expected_repository_path)).to be(true)
-            expect(File.directory?(expected_upload_path)).to be(true)
-            expect(File.directory?(expected_pages_path)).to be(true)
+            expect_project_directories_at('parent/renamed')
           end
         end
 
         context 'renaming parent' do
           it 'correctly moves the repository, uploads and pages' do
-            expected_repository_path = File.join(TestEnv.repos_path, 'renamed', 'child', 'the-project.git')
-            expected_upload_path = File.join(uploads_dir, 'renamed', 'child', 'the-project')
-            expected_pages_path = File.join(pages_dir, 'renamed', 'child', 'the-project')
+            parent.update!(path: 'renamed')
 
-            parent.update_attributes!(path: 'renamed')
+            expect_project_directories_at('renamed/child')
+          end
+        end
 
-            expect(File.directory?(expected_repository_path)).to be(true)
-            expect(File.directory?(expected_upload_path)).to be(true)
-            expect(File.directory?(expected_pages_path)).to be(true)
+        context 'moving from one parent to another' do
+          it 'correctly moves the repository, uploads and pages' do
+            child.update!(parent: new_parent)
+
+            expect_project_directories_at('new_parent/child')
+          end
+        end
+
+        context 'moving from having a parent to root' do
+          it 'correctly moves the repository, uploads and pages' do
+            child.update!(parent: nil)
+
+            expect_project_directories_at('child')
+          end
+        end
+
+        context 'moving from root to having a parent' do
+          it 'correctly moves the repository, uploads and pages' do
+            parent.update!(parent: new_parent)
+
+            expect_project_directories_at('new_parent/parent/child')
           end
         end
       end