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?? available_set.rb(3 KB)
?? basic_specification.rb(5.65 KB)
?? command.rb(13.43 KB)
?? command_manager.rb(4.62 KB)
?? commands
?? compatibility.rb(1.67 KB)
?? config_file.rb(12.23 KB)
?? core_ext
?? defaults.rb(3.64 KB)
?? dependency.rb(7.77 KB)
?? dependency_installer.rb(12.64 KB)
?? dependency_list.rb(5.53 KB)
?? deprecate.rb(1.7 KB)
?? doctor.rb(3.04 KB)
?? errors.rb(2.42 KB)
?? exceptions.rb(5.87 KB)
?? ext
?? ext.rb(431 B)
?? gem_runner.rb(1.96 KB)
?? gemcutter_utilities.rb(3.97 KB)
?? indexer.rb(13.03 KB)
?? install_default_message.rb(307 B)
?? install_message.rb(281 B)
?? install_update_options.rb(5.21 KB)
?? installer.rb(21.42 KB)
?? installer_test_case.rb(4.2 KB)
?? local_remote_options.rb(3.36 KB)
?? mock_gem_ui.rb(1.35 KB)
?? name_tuple.rb(2.23 KB)
?? package
?? package.rb(14.25 KB)
?? package_task.rb(3.77 KB)
?? path_support.rb(1.82 KB)
?? platform.rb(6.05 KB)
?? psych_additions.rb(269 B)
?? psych_tree.rb(763 B)
?? rdoc.rb(7.75 KB)
?? remote_fetcher.rb(9.46 KB)
?? request.rb(7.53 KB)
?? request_set
?? request_set.rb(6.94 KB)
?? requirement.rb(6.1 KB)
?? resolver
?? resolver.rb(12.46 KB)
?? safe_yaml.rb(1.11 KB)
?? security
?? security.rb(20.96 KB)
?? server.rb(21.69 KB)
?? source
?? source.rb(4.9 KB)
?? source_list.rb(2.47 KB)
?? source_local.rb(111 B)
?? source_specific_file.rb(93 B)
?? spec_fetcher.rb(6.4 KB)
?? specification.rb(70.8 KB)
?? ssl_certs
?? stub_specification.rb(3.1 KB)
?? syck_hack.rb(2.09 KB)
?? test_case.rb(35.62 KB)
?? test_utilities.rb(8.37 KB)
?? text.rb(1.23 KB)
?? uninstaller.rb(8.69 KB)
?? uri_formatter.rb(762 B)
?? user_interaction.rb(14.4 KB)
?? util
?? util.rb(2.26 KB)
?? validator.rb(4.18 KB)
?? version.rb(10.78 KB)
?? version_option.rb(1.83 KB)

Editing: stub_specification.rb

##
# Gem::StubSpecification reads the stub: line from the gemspec.  This prevents
# us having to eval the entire gemspec in order to find out certain
# information.

class Gem::StubSpecification < Gem::BasicSpecification
  # :nodoc:
  PREFIX = "# stub: "

OPEN_MODE = # :nodoc:
    if Object.const_defined? :Encoding then
      'r:UTF-8:-'
    else
      'r'
    end

class StubLine # :nodoc: all
    attr_reader :parts

def initialize(data)
      @parts = data[PREFIX.length..-1].split(" ")
    end

def name
      @parts[0]
    end

def version
      Gem::Version.new @parts[1]
    end

def platform
      Gem::Platform.new @parts[2]
    end

def require_paths
      @parts[3..-1].join(" ").split("\0")
    end
  end

def initialize(filename)
    self.loaded_from = filename
    @data            = nil
    @extensions      = nil
    @spec            = nil
  end

##
  # True when this gem has been activated

def activated?
    loaded = Gem.loaded_specs[name]
    loaded && loaded.version == version
  end

def build_extensions # :nodoc:
    return if default_gem?
    return if extensions.empty?

to_spec.build_extensions
  end

##
  # If the gemspec contains a stubline, returns a StubLine instance. Otherwise
  # returns the full Gem::Specification.

def data
    unless @data
      @extensions = []

open loaded_from, OPEN_MODE do |file|
        begin
          file.readline # discard encoding line
          stubline = file.readline.chomp
          if stubline.start_with?(PREFIX) then
            @data = StubLine.new stubline

@extensions = $'.split "\0" if
              /\A#{PREFIX}/ =~ file.readline.chomp
          end
        rescue EOFError
        end
      end
    end

@data ||= to_spec
  end

private :data

##
  # Extensions for this gem

def extensions
    return @extensions if @extensions

data # load

@extensions
  end

##
  # If a gem has a stub specification it doesn't need to bother with
  # compatibility with original_name gems.  It was installed with the
  # normalized name.

def find_full_gem_path # :nodoc:
    path = File.expand_path File.join gems_dir, full_name
    path.untaint
    path
  end

##
  # Full paths in the gem to add to <code>$LOAD_PATH</code> when this gem is
  # activated.

def full_require_paths
    @require_paths ||= data.require_paths

super
  end

##
  # Name of the gem

def name
    @name ||= data.name
  end

##
  # Platform of the gem

def platform
    @platform ||= data.platform
  end

##
  # Require paths of the gem

def require_paths
    @require_paths ||= data.require_paths

super
  end

##
  # The full Gem::Specification for this gem, loaded from evalling its gemspec

def to_spec
    @spec ||= Gem::Specification.load(loaded_from)
  end

##
  # Is this StubSpecification valid? i.e. have we found a stub line, OR does
  # the filename contain a valid gemspec?

def valid?
    data
  end

##
  # Version of the gem

def version
    @version ||= data.version
  end

##
  # Is there a stub line present for this StubSpecification?

def stubbed?
    data.is_a? StubLine
  end

end

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Editing: stub_specification.rb

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