middleman/middleman-core/lib/middleman-core/renderers/liquid.rb

# Require Gem
require 'liquid'

module Middleman
  module Renderers
    # Liquid Renderer
    module Liquid
      # Setup extension
      class << self
        # Once registerd
        def registered(app)
          # After config, setup liquid partial paths
          app.after_configuration do
            ::Liquid::Template.file_system = ::Liquid::LocalFileSystem.new(source_dir)

            # Convert data object into a hash for liquid
            sitemap.provides_metadata %r{\.liquid$} do
              { locals: { data: data.to_h } }
            end
          end
        end

        alias_method :included, :registered
      end
    end
  end
end