晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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DIR:/opt/alt/ruby18/lib64/ruby/1.8/rdoc/ri/
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require 'fileutils'

module RI
  class RiWriter

    def RiWriter.class_desc_path(dir, class_desc)
      File.join(dir, "cdesc-" + class_desc.name + ".yaml")
    end

    
    # Convert a name from internal form (containing punctuation)
    # to an external form (where punctuation is replaced
    # by %xx)

    def RiWriter.internal_to_external(name)
      name.gsub(/\W/) { sprintf("%%%02x", $&[0]) }
    end

    # And the reverse operation
    def RiWriter.external_to_internal(name)
      name.gsub(/%([0-9a-f]{2,2})/) { $1.to_i(16).chr }
    end

    def initialize(base_dir)
      @base_dir = base_dir
    end

    def remove_class(class_desc)
      FileUtils.rm_rf(path_to_dir(class_desc.full_name))
    end

    def add_class(class_desc)
      dir = path_to_dir(class_desc.full_name)
      FileUtils.mkdir_p(dir)
      class_file_name = RiWriter.class_desc_path(dir, class_desc)
      File.open(class_file_name, "w") do |f|
        f.write(class_desc.serialize)
      end
    end

    def add_method(class_desc, method_desc)
      dir = path_to_dir(class_desc.full_name)
      file_name = RiWriter.internal_to_external(method_desc.name)
      meth_file_name = File.join(dir, file_name)
      if method_desc.is_singleton
        meth_file_name += "-c.yaml"
      else
        meth_file_name += "-i.yaml"
      end

      File.open(meth_file_name, "w") do |f|
        f.write(method_desc.serialize)
      end
    end

    private

    def path_to_dir(class_name)
      File.join(@base_dir, *class_name.split('::'))
    end
  end
end