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Name	Size	Permission
commands	[ DIR ]	drwxr-xr-x
core_ext	[ DIR ]	drwxr-xr-x
defaults	[ DIR ]	drwxr-xr-x
ext	[ DIR ]	drwxr-xr-x
package	[ DIR ]	drwxr-xr-x
request	[ DIR ]	drwxr-xr-x
request_set	[ DIR ]	drwxr-xr-x
resolver	[ DIR ]	drwxr-xr-x
security	[ DIR ]	drwxr-xr-x
source	[ DIR ]	drwxr-xr-x
ssl_certs	[ DIR ]	drwxr-xr-x
util	[ DIR ]	drwxr-xr-x
available_set.rb	3.02 KB	-rw-r--r--
basic_specification.rb	7.62 KB	-rw-r--r--
bundler_version_finder.rb	2.97 KB	-rw-r--r--
command.rb	15.79 KB	-rw-r--r--
command_manager.rb	4.99 KB	-rw-r--r--
compatibility.rb	1022 B	-rw-r--r--
config_file.rb	12.69 KB	-rw-r--r--
defaults.rb	4.76 KB	-rw-r--r--
dependency.rb	8.64 KB	-rw-r--r--
dependency_installer.rb	12 KB	-rw-r--r--
dependency_list.rb	5.54 KB	-rw-r--r--
deprecate.rb	1.75 KB	-rw-r--r--
doctor.rb	3.06 KB	-rw-r--r--
errors.rb	4.64 KB	-rw-r--r--
exceptions.rb	6.49 KB	-rw-r--r--
ext.rb	460 B	-rw-r--r--
gem_runner.rb	2.18 KB	-rw-r--r--
gemcutter_utilities.rb	5.16 KB	-rw-r--r--
indexer.rb	11.29 KB	-rw-r--r--
install_default_message.rb	336 B	-rw-r--r--
install_message.rb	310 B	-rw-r--r--
install_update_options.rb	6.26 KB	-rw-r--r--
installer.rb	26.62 KB	-rw-r--r--
installer_test_case.rb	4.8 KB	-rw-r--r--
local_remote_options.rb	3.53 KB	-rw-r--r--
mock_gem_ui.rb	1.38 KB	-rw-r--r--
name_tuple.rb	2.42 KB	-rw-r--r--
package.rb	17.99 KB	-rw-r--r--
package_task.rb	3.8 KB	-rw-r--r--
path_support.rb	1.88 KB	-rw-r--r--
platform.rb	6.25 KB	-rw-r--r--
psych_additions.rb	300 B	-rw-r--r--
psych_tree.rb	796 B	-rw-r--r--
rdoc.rb	524 B	-rw-r--r--
remote_fetcher.rb	9.48 KB	-rw-r--r--
request.rb	8.7 KB	-rw-r--r--
request_set.rb	11.94 KB	-rw-r--r--
requirement.rb	7.15 KB	-rw-r--r--
resolver.rb	9.46 KB	-rw-r--r--
s3_uri_signer.rb	5.93 KB	-rw-r--r--
safe_yaml.rb	1.55 KB	-rw-r--r--
security.rb	21.24 KB	-rw-r--r--
security_option.rb	1.03 KB	-rw-r--r--
server.rb	22.72 KB	-rw-r--r--
source.rb	5.38 KB	-rw-r--r--
source_list.rb	2.55 KB	-rw-r--r--
source_local.rb	274 B	-rw-r--r--
source_specific_file.rb	272 B	-rw-r--r--
spec_fetcher.rb	6.3 KB	-rw-r--r--
specification.rb	70.78 KB	-rw-r--r--
specification_policy.rb	11.67 KB	-rw-r--r--
stub_specification.rb	4.74 KB	-rw-r--r--
syck_hack.rb	2.12 KB	-rw-r--r--
test_case.rb	39.92 KB	-rw-r--r--
test_utilities.rb	8.84 KB	-rw-r--r--
text.rb	1.85 KB	-rw-r--r--
uninstaller.rb	8.83 KB	-rw-r--r--
uri_formatter.rb	778 B	-rw-r--r--
uri_parser.rb	785 B	-rw-r--r--
uri_parsing.rb	324 B	-rw-r--r--
user_interaction.rb	13.3 KB	-rw-r--r--
util.rb	2.41 KB	-rw-r--r--
validator.rb	3.65 KB	-rw-r--r--
version.rb	12.45 KB	-rw-r--r--
version_option.rb	2.02 KB	-rw-r--r--

Code Editor : spec_fetcher.rb

# frozen_string_literal: true
require 'rubygems/remote_fetcher'
require 'rubygems/user_interaction'
require 'rubygems/errors'
require 'rubygems/text'
require 'rubygems/name_tuple'

##
# SpecFetcher handles metadata updates from remote gem repositories.

class Gem::SpecFetcher

include Gem::UserInteraction
  include Gem::Text

##
  # Cache of latest specs

attr_reader :latest_specs # :nodoc:

##
  # Sources for this SpecFetcher

attr_reader :sources # :nodoc:

##
  # Cache of all released specs

attr_reader :specs # :nodoc:

##
  # Cache of prerelease specs

attr_reader :prerelease_specs # :nodoc:

@fetcher = nil

##
  # Default fetcher instance.  Use this instead of ::new to reduce object
  # allocation.

def self.fetcher
    @fetcher ||= new
  end

def self.fetcher=(fetcher) # :nodoc:
    @fetcher = fetcher
  end

##
  # Creates a new SpecFetcher.  Ordinarily you want to use the default fetcher
  # from Gem::SpecFetcher::fetcher which uses the Gem.sources.
  #
  # If you need to retrieve specifications from a different +source+, you can
  # send it as an argument.

def initialize(sources = nil)
    @sources = sources || Gem.sources

@update_cache =
      begin
        File.stat(Gem.user_home).uid == Process.uid
      rescue Errno::EACCES, Errno::ENOENT
        false
      end

@specs = {}
    @latest_specs = {}
    @prerelease_specs = {}

@caches = {
      :latest => @latest_specs,
      :prerelease => @prerelease_specs,
      :released => @specs,
    }

@fetcher = Gem::RemoteFetcher.fetcher
  end

##
  #
  # Find and fetch gem name tuples that match +dependency+.
  #
  # If +matching_platform+ is false, gems for all platforms are returned.

def search_for_dependency(dependency, matching_platform=true)
    found = {}

rejected_specs = {}

list, errors = available_specs(dependency.identity)

list.each do |source, specs|
      if dependency.name.is_a?(String) && specs.respond_to?(:bsearch)
        start_index = (0 ... specs.length).bsearch{ |i| specs[i].name >= dependency.name }
        end_index   = (0 ... specs.length).bsearch{ |i| specs[i].name > dependency.name }
        specs = specs[start_index ... end_index] if start_index && end_index
      end

found[source] = specs.select do |tup|
        if dependency.match?(tup)
          if matching_platform and !Gem::Platform.match(tup.platform)
            pm = (
              rejected_specs[dependency] ||= \
                Gem::PlatformMismatch.new(tup.name, tup.version))
            pm.add_platform tup.platform
            false
          else
            true
          end
        end
      end
    end

errors += rejected_specs.values

tuples = []

found.each do |source, specs|
      specs.each do |s|
        tuples << [s, source]
      end
    end

tuples = tuples.sort_by { |x| x[0] }

return [tuples, errors]
  end

##
  # Return all gem name tuples who's names match +obj+

def detect(type=:complete)
    tuples = []

list, _ = available_specs(type)
    list.each do |source, specs|
      specs.each do |tup|
        if yield(tup)
          tuples << [tup, source]
        end
      end
    end

tuples
  end

##
  # Find and fetch specs that match +dependency+.
  #
  # If +matching_platform+ is false, gems for all platforms are returned.

def spec_for_dependency(dependency, matching_platform=true)
    tuples, errors = search_for_dependency(dependency, matching_platform)

specs = []
    tuples.each do |tup, source|
      begin
        spec = source.fetch_spec(tup)
      rescue Gem::RemoteFetcher::FetchError => e
        errors << Gem::SourceFetchProblem.new(source, e)
      else
        specs << [spec, source]
      end
    end

return [specs, errors]
  end

##
  # Suggests gems based on the supplied +gem_name+. Returns an array of
  # alternative gem names.

def suggest_gems_from_name(gem_name, type = :latest)
    gem_name        = gem_name.downcase.tr('_-', '')
    max             = gem_name.size / 2
    names           = available_specs(type).first.values.flatten(1)

matches = names.map do |n|
      next unless n.match_platform?

distance = levenshtein_distance gem_name, n.name.downcase.tr('_-', '')

next if distance >= max

return [n.name] if distance == 0

[n.name, distance]
    end.compact

matches = if matches.empty? && type != :prerelease
                suggest_gems_from_name gem_name, :prerelease
              else
                matches.uniq.sort_by { |name, dist| dist }
              end

matches.first(5).map { |name, dist| name }
  end

##
  # Returns a list of gems available for each source in Gem::sources.
  #
  # +type+ can be one of 3 values:
  # :released   => Return the list of all released specs
  # :complete   => Return the list of all specs
  # :latest     => Return the list of only the highest version of each gem
  # :prerelease => Return the list of all prerelease only specs
  #

def available_specs(type)
    errors = []
    list = {}

@sources.each_source do |source|
      begin
        names = case type
                when :latest
                  tuples_for source, :latest
                when :released
                  tuples_for source, :released
                when :complete
                  names =
                    tuples_for(source, :prerelease, true) +
                    tuples_for(source, :released)

names.sort
                when :abs_latest
                  names =
                    tuples_for(source, :prerelease, true) +
                    tuples_for(source, :latest)

names.sort
                when :prerelease
                  tuples_for(source, :prerelease)
                else
                  raise Gem::Exception, "Unknown type - :#{type}"
                end
      rescue Gem::RemoteFetcher::FetchError => e
        errors << Gem::SourceFetchProblem.new(source, e)
      else
        list[source] = names
      end
    end

[list, errors]
  end

##
  # Retrieves NameTuples from +source+ of the given +type+ (:prerelease,
  # etc.).  If +gracefully_ignore+ is true, errors are ignored.

def tuples_for(source, type, gracefully_ignore=false) # :nodoc:
    @caches[type][source.uri] ||=
      source.load_specs(type).sort_by { |tup| tup.name }
  rescue Gem::RemoteFetcher::FetchError
    raise unless gracefully_ignore
    []
  end

end

${this.title}

Code Editor : spec_fetcher.rb