class Haml::RailsTemplate

def call(template, source = nil)
  source ||= template.source
  options = RailsTemplate.options
  # Make the filename available in parser etc.
  if template.respond_to?(:identifier)
    options = options.merge(filename: template.identifier)
  end
  # https://github.com/haml/haml/blob/4.0.7/lib/haml/template/plugin.rb#L19-L20
  # https://github.com/haml/haml/blob/4.0.7/lib/haml/options.rb#L228
  if template.respond_to?(:type) && template.type == 'text/xml'
    options = options.merge(format: :xhtml)
  end
  if ActionView::Base.try(:annotate_rendered_view_with_filenames) && template.format == :html
    options = options.merge(
      preamble: "<!-- BEGIN #{template.short_identifier} -->\n",
      postamble: "<!-- END #{template.short_identifier} -->\n",
    )
  end
  Engine.new(options).call(source)
end