pry.rb

$ current_resource.path // => "index.html"
$ current_resource.destination_path // => "index.html"
$ current_resource.source_file // => "/path/to/dir/middleman-guides/source/index.html.erb"
$ current_resource.url // => "/"
$ current_resource.ext // => ".html" 
$ current_resource.data // => {"layout"=>"layout"}
$ current_resource.data.layout // => "layout"

sitemap.rb

$ sitemap.resources.select { |page| page.destination_path =~ /\.html/ }.each do |page|
$   puts page.destination_path 
$ end