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?? available_set.rb(1.56 KB)
?? command.rb(13.43 KB)
?? command_manager.rb(5.27 KB)
?? commands
?? compatibility.rb(1.58 KB)
?? config_file.rb(11.82 KB)
?? core_ext
?? defaults.rb(2.76 KB)
?? dependency.rb(7.74 KB)
?? dependency_installer.rb(12.36 KB)
?? dependency_list.rb(5.53 KB)
?? dependency_resolver.rb(14.97 KB)
?? deprecate.rb(1.73 KB)
?? doctor.rb(2.86 KB)
?? errors.rb(2.14 KB)
?? exceptions.rb(2.7 KB)
?? ext
?? ext.rb(416 B)
?? gem_runner.rb(1.98 KB)
?? gemcutter_utilities.rb(2.84 KB)
?? indexer.rb(12.89 KB)
?? install_message.rb(281 B)
?? install_update_options.rb(5.09 KB)
?? installer.rb(22.19 KB)
?? installer_test_case.rb(4.28 KB)
?? local_remote_options.rb(3.36 KB)
?? mock_gem_ui.rb(1.35 KB)
?? name_tuple.rb(1.96 KB)
?? package
?? package.rb(13.22 KB)
?? package_task.rb(3.77 KB)
?? path_support.rb(1.58 KB)
?? platform.rb(5.63 KB)
?? psych_additions.rb(249 B)
?? psych_tree.rb(763 B)
?? rdoc.rb(7.75 KB)
?? remote_fetcher.rb(15.99 KB)
?? request_set.rb(3.67 KB)
?? requirement.rb(6.02 KB)
?? safe_yaml.rb(1.11 KB)
?? security
?? security.rb(20.56 KB)
?? server.rb(21.69 KB)
?? source.rb(3.12 KB)
?? source_list.rb(1.22 KB)
?? source_local.rb(1.88 KB)
?? source_specific_file.rb(552 B)
?? spec_fetcher.rb(5.17 KB)
?? specification.rb(66.9 KB)
?? ssl_certs
?? syck_hack.rb(2.07 KB)
?? test_case.rb(28.09 KB)
?? test_utilities.rb(4.03 KB)
?? text.rb(1.23 KB)
?? uninstaller.rb(8.29 KB)
?? user_interaction.rb(11.44 KB)
?? validator.rb(4.08 KB)
?? version.rb(10.5 KB)
?? version_option.rb(1.59 KB)

Editing: spec_fetcher.rb

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:

##
  # Cache of all released specs

attr_reader :specs # :nodoc:

##
  # Cache of prerelease specs

attr_reader :prerelease_specs # :nodoc:

@fetcher = nil

def self.fetcher
    @fetcher ||= new
  end

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

def initialize
    @dir = File.join Gem.user_home, '.gem', 'specs'
    @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 = {}

if dependency.prerelease?
      type = :complete
    elsif dependency.latest_version?
      type = :latest
    else
      type = :released
    end

list, errors = available_specs(type)
    list.each do |source, specs|
      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
    gem_name        = gem_name.downcase.tr('_-', '')
    max             = gem_name.size / 2
    names           = available_specs(:complete).first.values.flatten(1)

matches = names.map { |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]
    }.compact

matches = matches.uniq.sort_by { |name, dist| dist }

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 = {}

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

def tuples_for(source, type, gracefully_ignore=false)
    cache = @caches[type]

if gracefully_ignore
      begin
        cache[source.uri] ||= source.load_specs(type)
      rescue Gem::RemoteFetcher::FetchError
        []
      end
    else
      cache[source.uri] ||= source.load_specs(type)
    end
  end

end

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