Pulling front matter from Rails views template.

front_matter.rb

require 'active_support/concern'

module FrontMatter
  extend ActiveSupport::Concern

  included do
    helper_method :front_matter
  end

  def front_matter
    @front_matter ||= read_front_matter
  end

  def read_front_matter
    full_path = "#{Rails.root}/app/views/#{request[:controller]}/#{request[:action]}.html.erb"
    @content = File.read(full_path)
    if @content =~ /^(<%# ---\s+)(.*?)(\s+--- %>)/m
      @front_matter = YAML.load($2).symbolize_keys
      remove_instance_variable(:@content)
    end
    @front_matter ||= {}
  end

end