Support bulk registry tag delete

app/controllers/projects/registry/tags_controller.rb

@@ -28,6 +28,21 @@ module Projects
         end
       end
 
+      def bulk_destroy
+        @tags = (params[:ids] || []).map { |tag_name| image.tag(tag_name) }
+
+        success_count = 0
+        @tags.each do |tag|
+          if tag.delete
+            success_count += 1
+          end
+        end
+
+        respond_to do |format|
+          format.json { head(success_count == @tags.size ? :no_content : :bad_request) }
+        end
+      end
+
       private
 
       def tags

config/routes/project.rb

@@ -474,7 +474,11 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
           # in JSON format, or a request for tag named `latest.json`.
           scope format: false do
             resources :tags, only: [:index, :destroy],
-                             constraints: { id: Gitlab::Regex.container_registry_tag_regex }
+                             constraints: { id: Gitlab::Regex.container_registry_tag_regex } do
+              collection do
+                delete :bulk_destroy
+              end
+            end
           end
         end
       end

spec/controllers/projects/registry/tags_controller_spec.rb

@@ -113,4 +113,37 @@ describe Projects::Registry::TagsController do
                      format: :json
     end
   end
+
+  describe 'POST bulk_destroy' do
+    context 'when user has access to registry' do
+      before do
+        project.add_developer(user)
+      end
+
+      context 'when there is matching tag present' do
+        before do
+          stub_container_registry_tags(repository: repository.path, tags: %w[rc1 test.])
+        end
+
+        it 'makes it possible to delete tags in bulk' do
+          allow_any_instance_of(ContainerRegistry::Tag).to receive(:delete) { |*args| ContainerRegistry::Tag.delete(*args) }
+          expect(ContainerRegistry::Tag).to receive(:delete).exactly(2).times
+
+          bulk_destroy_tags(['rc1', 'test.'])
+        end
+      end
+    end
+
+    private
+
+    def bulk_destroy_tags(names)
+      post :bulk_destroy, params: {
+                       namespace_id: project.namespace,
+                       project_id: project,
+                       repository_id: repository,
+                       ids: names
+                     },
+                     format: :json
+    end
+  end
 end