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Current path: opt/alt/ruby34/share/rubygems/rubygems/

✏️ Editing: source.rb

# frozen_string_literal: true

require_relative "text"
##
# A Source knows how to list and fetch gems from a RubyGems marshal index.
#
# There are other Source subclasses for installed gems, local gems, the
# bundler dependency API and so-forth.

class Gem::Source
  include Comparable
  include Gem::Text

FILES = { # :nodoc:
    released: "specs",
    latest: "latest_specs",
    prerelease: "prerelease_specs",
  }.freeze

##
  # The URI this source will fetch gems from.

attr_reader :uri

##
  # Creates a new Source which will use the index located at +uri+.

def initialize(uri)
    require_relative "uri"
    @uri = Gem::Uri.parse!(uri)
    @update_cache = nil
  end

##
  # Sources are ordered by installation preference.

def <=>(other)
    case other
    when Gem::Source::Installed,
         Gem::Source::Local,
         Gem::Source::Lock,
         Gem::Source::SpecificFile,
         Gem::Source::Git,
         Gem::Source::Vendor then
      -1
    when Gem::Source then
      unless @uri
        return 0 unless other.uri
        return 1
      end

return -1 unless other.uri

# Returning 1 here ensures that when sorting a list of sources, the
      # original ordering of sources supplied by the user is preserved.
      return 1 unless @uri.to_s == other.uri.to_s

0
    end
  end

def ==(other) # :nodoc:
    self.class === other && @uri == other.uri
  end

alias_method :eql?, :== # :nodoc:

##
  # Returns a Set that can fetch specifications from this source.

def dependency_resolver_set # :nodoc:
    return Gem::Resolver::IndexSet.new self if uri.scheme == "file"

fetch_uri = if uri.host == "rubygems.org"
      index_uri = uri.dup
      index_uri.host = "index.rubygems.org"
      index_uri
    else
      uri
    end

bundler_api_uri = enforce_trailing_slash(fetch_uri) + "versions"

begin
      fetcher = Gem::RemoteFetcher.fetcher
      response = fetcher.fetch_path bundler_api_uri, nil, true
    rescue Gem::RemoteFetcher::FetchError
      Gem::Resolver::IndexSet.new self
    else
      Gem::Resolver::APISet.new response.uri + "./info/"
    end
  end

def hash # :nodoc:
    @uri.hash
  end

##
  # Returns the local directory to write +uri+ to.

def cache_dir(uri)
    # Correct for windows paths
    escaped_path = uri.path.sub(%r{^/([a-z]):/}i, '/\\1-/')

File.join Gem.spec_cache_dir, "#{uri.host}%#{uri.port}", File.dirname(escaped_path)
  end

##
  # Returns true when it is possible and safe to update the cache directory.

def update_cache?
    return @update_cache unless @update_cache.nil?
    @update_cache =
      begin
        File.stat(Gem.user_home).uid == Process.uid
      rescue Errno::ENOENT
        false
      end
  end

##
  # Fetches a specification for the given +name_tuple+.

def fetch_spec(name_tuple)
    fetcher = Gem::RemoteFetcher.fetcher

spec_file_name = name_tuple.spec_name

source_uri = enforce_trailing_slash(uri) + "#{Gem::MARSHAL_SPEC_DIR}#{spec_file_name}"

cache_dir = cache_dir source_uri

local_spec = File.join cache_dir, spec_file_name

if File.exist? local_spec
      spec = Gem.read_binary local_spec
      Gem.load_safe_marshal
      spec = begin
               Gem::SafeMarshal.safe_load(spec)
             rescue StandardError
               nil
             end
      return spec if spec
    end

source_uri.path << ".rz"

spec = fetcher.fetch_path source_uri
    spec = Gem::Util.inflate spec

if update_cache?
      require "fileutils"
      FileUtils.mkdir_p cache_dir

File.open local_spec, "wb" do |io|
        io.write spec
      end
    end

Gem.load_safe_marshal
    # TODO: Investigate setting Gem::Specification#loaded_from to a URI
    Gem::SafeMarshal.safe_load spec
  end

##
  # Loads +type+ kind of specs fetching from +@uri+ if the on-disk cache is
  # out of date.
  #
  # +type+ is one of the following:
  #
  # :released   => Return the list of all released specs
  # :latest     => Return the list of only the highest version of each gem
  # :prerelease => Return the list of all prerelease only specs
  #

def load_specs(type)
    file       = FILES[type]
    fetcher    = Gem::RemoteFetcher.fetcher
    file_name  = "#{file}.#{Gem.marshal_version}"
    spec_path  = enforce_trailing_slash(uri) + "#{file_name}.gz"
    cache_dir  = cache_dir spec_path
    local_file = File.join(cache_dir, file_name)
    retried    = false

if update_cache?
      require "fileutils"
      FileUtils.mkdir_p cache_dir
    end

spec_dump = fetcher.cache_update_path spec_path, local_file, update_cache?

Gem.load_safe_marshal
    begin
      Gem::NameTuple.from_list Gem::SafeMarshal.safe_load(spec_dump)
    rescue ArgumentError
      if update_cache? && !retried
        FileUtils.rm local_file
        retried = true
        retry
      else
        raise Gem::Exception.new("Invalid spec cache file in #{local_file}")
      end
    end
  end

##
  # Downloads +spec+ and writes it to +dir+.  See also
  # Gem::RemoteFetcher#download.

def download(spec, dir=Dir.pwd)
    fetcher = Gem::RemoteFetcher.fetcher
    fetcher.download spec, uri.to_s, dir
  end

def pretty_print(q) # :nodoc:
    q.object_group(self) do
      q.group 2, "[Remote:", "]" do
        q.breakable
        q.text @uri.to_s

if api = uri
          q.breakable
          q.text "API URI: "
          q.text api.to_s
        end
      end
    end
  end

def typo_squatting?(host, distance_threshold=4)
    return if @uri.host.nil?
    levenshtein_distance(@uri.host, host).between? 1, distance_threshold
  end

private

def enforce_trailing_slash(uri)
    uri.merge(uri.path.gsub(%r{/+$}, "") + "/")
  end
end

require_relative "source/git"
require_relative "source/installed"
require_relative "source/specific_file"
require_relative "source/local"
require_relative "source/lock"
require_relative "source/vendor"

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