module DeviseHelper

def devise_error_messages!
  ActiveSupport::Deprecation.warn <<-DEPRECATION.strip_heredoc
    [Devise] `DeviseHelper#devise_error_messages!` is deprecated and will be
    removed in the next major version.
    Devise now uses a partial under "devise/shared/error_messages" to display
    error messages by default, and make them easier to customize. Update your
    views changing calls from:
        <%= devise_error_messages! %>
    to:
        <%= render "devise/shared/error_messages", resource: resource %>
    To start customizing how errors are displayed, you can copy the partial
    from devise to your `app/views` folder. Alternatively, you can run
    `rails g devise:views` which will copy all of them again to your app.
  DEPRECATION
  return "" if resource.errors.empty?
  render "devise/shared/error_messages", resource: resource
end