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/ruby34/share/gems/gems/bundler-2.6.9/lib/bundler/
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Current File : //opt/alt/ruby34/share/gems/gems/bundler-2.6.9/lib/bundler/source.rb
# frozen_string_literal: true

module Bundler
  class Source
    autoload :Gemspec,  File.expand_path("source/gemspec", __dir__)
    autoload :Git,      File.expand_path("source/git", __dir__)
    autoload :Metadata, File.expand_path("source/metadata", __dir__)
    autoload :Path,     File.expand_path("source/path", __dir__)
    autoload :Rubygems, File.expand_path("source/rubygems", __dir__)
    autoload :RubygemsAggregate, File.expand_path("source/rubygems_aggregate", __dir__)

    attr_accessor :dependency_names

    attr_reader :checksum_store

    def unmet_deps
      specs.unmet_dependency_names
    end

    def version_message(spec, locked_spec = nil)
      message = "#{spec.name} #{spec.version}"
      message += " (#{spec.platform})" if spec.platform != Gem::Platform::RUBY && !spec.platform.nil?

      if locked_spec
        locked_spec_version = locked_spec.version
        if locked_spec_version && spec.version != locked_spec_version
          message += Bundler.ui.add_color(" (was #{locked_spec_version})", version_color(spec.version, locked_spec_version))
        end
      end

      message
    end

    def can_lock?(spec)
      spec.source == self
    end

    def prefer_local!; end

    def local!; end

    def local_only!; end

    def cached!; end

    def remote!; end

    def add_dependency_names(names)
      @dependency_names = Array(dependency_names) | Array(names)
    end

    # it's possible that gems from one source depend on gems from some
    # other source, so now we download gemspecs and iterate over those
    # dependencies, looking for gems we don't have info on yet.
    def double_check_for(*); end

    def dependency_names_to_double_check
      specs.dependency_names
    end

    def spec_names
      specs.spec_names
    end

    def include?(other)
      other == self
    end

    def inspect
      "#<#{self.class}:0x#{object_id} #{self}>"
    end

    def identifier
      to_s
    end

    def path?
      instance_of?(Bundler::Source::Path)
    end

    def extension_cache_path(spec)
      return unless Bundler.feature_flag.global_gem_cache?
      return unless source_slug = extension_cache_slug(spec)
      Bundler.user_cache.join(
        "extensions", Gem::Platform.local.to_s, Bundler.ruby_scope,
        source_slug, spec.full_name
      )
    end

    private

    def version_color(spec_version, locked_spec_version)
      if Gem::Version.correct?(spec_version) && Gem::Version.correct?(locked_spec_version)
        # display yellow if there appears to be a regression
        earlier_version?(spec_version, locked_spec_version) ? :yellow : :green
      else
        # default to green if the versions cannot be directly compared
        :green
      end
    end

    def earlier_version?(spec_version, locked_spec_version)
      Gem::Version.new(spec_version) < Gem::Version.new(locked_spec_version)
    end

    def print_using_message(message)
      if !message.include?("(was ")
        Bundler.ui.debug message
      else
        Bundler.ui.info message
      end
    end

    def extension_cache_slug(_)
      nil
    end
  end
end