Remove projects before group/user. Remove namespace directory async

app/models/namespace.rb

@@ -99,7 +99,14 @@ class Namespace < ActiveRecord::Base
   end
 
   def rm_dir
-    gitlab_shell.rm_namespace(path)
+    # Move namespace directory into trash.
+    # We will remove it later async
+    new_path = "#{path}+#{id}+deleted"
+    gitlab_shell.mv_namespace(path, new_path)
+
+    # Remove namespace directroy async with delay so
+    # GitLab has time to remove all projects first
+    GitlabShellWorker.perform_in(5.minutes, :rm_namespace, new_path)
   end
 
   def move_dir

app/services/delete_user_service.rb

@@ -4,6 +4,11 @@ class DeleteUserService
       user.errors[:base] << 'You must transfer ownership or delete groups before you can remove user'
       user
     else
+      # TODO: Skip remove repository so Namespace#rm_dir works
+      user.personal_projects.each do |project|
+        ::Projects::DestroyService.new(project, current_user, {}).execute
+      end
+
       user.destroy
     end
   end

app/services/destroy_group_service.rb

@@ -6,6 +6,11 @@ class DestroyGroupService
   end
 
   def execute
+    # TODO: Skip remove repository so Namespace#rm_dir works
+    @group.projects.each do |project|
+      ::Projects::DestroyService.new(project, current_user, {}).execute
+    end
+
     @group.destroy
   end
 end