gistfile1.rb

Rails::Generator::Commands::Create.class_eval do
  def template(relative_source, relative_destination, template_options = {})
    file(relative_source, relative_destination, template_options) do |file|
      # Evaluate any assignments in a temporary, throwaway binding.
      vars = template_options[:assigns] || {}
      b    = template_options[:binding] || binding
      # this no longer works, eval throws "undefined local variable or method `vars'" 
      # vars.each { |k, v| eval "#{k} = vars[:#{k}] || vars['#{k}']", b }
      vars.each { |k, v| b.local_variable_set(:"#{k}", v) }

      # Render the source file with the temporary binding.
      ERB.new(file.read, nil, '-').result(b)
    end
  end
end