module RevealCK
  module Builders
    #
    # Public: A Builder knows how to execute BuildTasks. These are added
    # via add_task, and executed via build!
    #
    # It is expected to be subclassed, and the subclass must override
    # register_tasks.
    #
    class Builder

      def register_tasks
        raise 'Subclasses must implement register_tasks'
      end

      def add_task(description, &action)
        @tasks << BuildTask.new(description, action)
      end

      def build!
        register_tasks unless @tasks
        @tasks.each { |task| task.go }
      end

    end
  end
end