class Middleman::TemplateRenderer

def self.resolve_template(app, request_path, options={})
  # Find the path by searching
  relative_path = Util.strip_leading_slash(request_path.to_s)
  # By default, any engine will do
  preferred_engines = []
  # If we're specifically looking for a preferred engine
  if options.key?(:preferred_engine)
    extension_class = ::Middleman::Util.tilt_class(options[:preferred_engine])
    # Get a list of extensions for a preferred engine
    preferred_engines += ::Tilt.default_mapping.extensions_for(extension_class)
  end
  preferred_engines << '*'
  preferred_engines << nil if options[:try_static]
  found_template = nil
  preferred_engines.each do |preferred_engine|
    path_with_ext = relative_path.dup
    path_with_ext << ('.' + preferred_engine) unless preferred_engine.nil?
    globbing = preferred_engine == '*'
    # Cache lookups in build mode only
    file = if app.build?
      cache.fetch(path_with_ext, preferred_engine) do
        app.files.find(:source, path_with_ext, globbing)
      end
    else
      app.files.find(:source, path_with_ext, globbing)
    end
    found_template = file if file && (preferred_engine.nil? || ::Middleman::Util.tilt_class(file[:full_path].to_s))
    break if found_template
  end
  # If we found one, return it
  found_template
end