ruby.rb

class Report
  include ERB::Util

  attr_reader :everthing, :template

  def initialize(args)
    serial      = SERIAL
    output_file = args[:output_file] or raise ArgumentError, 'Failed to specify the output pdf file in arguments.'
    @tmpl_file  = args[:template]    or raise ArgumentError, 'Failed to specify the template to use for rendering.'

    @everything = Target::GatherData.new(serial).aggregated
  end

  def render
    template    = File.read(@tmpl_file).chomp
    layout      = ERB.new(template, 0, '')
    layout.result(binding)     # always get NoMethodError: undefined method `[]' for nil:NilClass
  end
end