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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sh-3ll 1.0
DIR:/opt/alt/ruby34/share/rubygems/rubygems/source/
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Current File : //opt/alt/ruby34/share/rubygems/rubygems/source/specific_file.rb
# frozen_string_literal: true

##
# A source representing a single .gem file.  This is used for installation of
# local gems.

class Gem::Source::SpecificFile < Gem::Source
  ##
  # The path to the gem for this specific file.

  attr_reader :path

  ##
  # Creates a new SpecificFile for the gem in +file+

  def initialize(file)
    @uri = nil
    @path = ::File.expand_path(file)

    @package = Gem::Package.new @path
    @spec = @package.spec
    @name = @spec.name_tuple
  end

  ##
  # The Gem::Specification extracted from this .gem.

  attr_reader :spec

  def load_specs(*a) # :nodoc:
    [@name]
  end

  def fetch_spec(name) # :nodoc:
    return @spec if name == @name
    raise Gem::Exception, "Unable to find '#{name}'"
  end

  def download(spec, dir = nil) # :nodoc:
    return @path if spec == @spec
    raise Gem::Exception, "Unable to download '#{spec.full_name}'"
  end

  def pretty_print(q) # :nodoc:
    q.object_group(self) do
      q.group 2, "[SpecificFile:", "]" do
        q.breakable
        q.text @path
      end
    end
  end

  ##
  # Orders this source against +other+.
  #
  # If +other+ is a SpecificFile from a different gem name +nil+ is returned.
  #
  # If +other+ is a SpecificFile from the same gem name the versions are
  # compared using Gem::Version#<=>
  #
  # Otherwise Gem::Source#<=> is used.

  def <=>(other)
    case other
    when Gem::Source::SpecificFile then
      return nil if @spec.name != other.spec.name

      @spec.version <=> other.spec.version
    else
      super
    end
  end
end