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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Current File : //opt/alt/ruby31/share/rubygems/rubygems/bundler_version_finder.rb
# frozen_string_literal: true

module Gem::BundlerVersionFinder
  def self.bundler_version
    v = ENV["BUNDLER_VERSION"]

    v ||= bundle_update_bundler_version
    return if v == true

    v ||= lockfile_version
    return unless v

    Gem::Version.new(v)
  end

  def self.prioritize!(specs)
    exact_match_index = specs.find_index {|spec| spec.version == bundler_version }
    return unless exact_match_index

    specs.unshift(specs.delete_at(exact_match_index))
  end

  def self.bundle_update_bundler_version
    return unless File.basename($0) == "bundle".freeze
    return unless "update".start_with?(ARGV.first || " ")
    bundler_version = nil
    update_index = nil
    ARGV.each_with_index do |a, i|
      if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
        bundler_version = a
      end
      next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
      bundler_version = $1 || true
      update_index = i
    end
    bundler_version
  end
  private_class_method :bundle_update_bundler_version

  def self.lockfile_version
    return unless contents = lockfile_contents
    regexp = /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
    return unless contents =~ regexp
    $1
  end
  private_class_method :lockfile_version

  def self.lockfile_contents
    gemfile = ENV["BUNDLE_GEMFILE"]
    gemfile = nil if gemfile && gemfile.empty?

    unless gemfile
      begin
        Gem::Util.traverse_parents(Dir.pwd) do |directory|
          next unless gemfile = Gem::GEM_DEP_FILES.find {|f| File.file?(f.tap(&Gem::UNTAINT)) }

          gemfile = File.join directory, gemfile
          break
        end
      rescue Errno::ENOENT
        return
      end
    end

    return unless gemfile

    lockfile = case gemfile
    when "gems.rb" then "gems.locked"
    else "#{gemfile}.lock"
    end.dup.tap(&Gem::UNTAINT)

    return unless File.file?(lockfile)

    File.read(lockfile)
  end
  private_class_method :lockfile_contents
end