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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: util.rb

##
# This module contains various utility methods as module methods.

module Gem::Util

@silent_mutex = nil

##
  # Zlib::GzipReader wrapper that unzips +data+.

def self.gunzip(data)
    require 'zlib'
    require 'rubygems/util/stringio'
    data = Gem::StringSource.new data

unzipped = Zlib::GzipReader.new(data).read
    unzipped.force_encoding Encoding::BINARY if Object.const_defined? :Encoding
    unzipped
  end

##
  # Zlib::GzipWriter wrapper that zips +data+.

def self.gzip(data)
    require 'zlib'
    require 'rubygems/util/stringio'
    zipped = Gem::StringSink.new
    zipped.set_encoding Encoding::BINARY if Object.const_defined? :Encoding

Zlib::GzipWriter.wrap zipped do |io| io.write data end

zipped.string
  end

##
  # A Zlib::Inflate#inflate wrapper

def self.inflate(data)
    require 'zlib'
    Zlib::Inflate.inflate data
  end

##
  # This calls IO.popen where it accepts an array for a +command+ (Ruby 1.9+)
  # and implements an IO.popen-like behavior where it does not accept an array
  # for a command.

def self.popen *command
    IO.popen command, &:read
  rescue TypeError # ruby 1.8 only supports string command
    r, w = IO.pipe

pid = fork do
      STDIN.close
      STDOUT.reopen w

exec(*command)
    end

w.close

begin
      return r.read
    ensure
      Process.wait pid
    end
  end

##
  # Invokes system, but silences all output.

def self.silent_system *command
    require 'thread'

@silent_mutex ||= Mutex.new

null_device = Gem.win_platform? ? 'NUL' : '/dev/null'

@silent_mutex.synchronize do
      begin
        stdout = STDOUT.dup
        stderr = STDERR.dup

STDOUT.reopen null_device, 'w'
        STDERR.reopen null_device, 'w'

return system(*command)
      ensure
        STDOUT.reopen stdout
        STDERR.reopen stderr
      end
    end
  end

##
  # Enumerates the parents of +directory+.

def self.traverse_parents directory
    return enum_for __method__, directory unless block_given?

here = File.expand_path directory
    start = here

Dir.chdir start

begin
      loop do
        yield here

Dir.chdir '..'

return if Dir.pwd == here # toplevel

here = Dir.pwd
      end
    ensure
      Dir.chdir start
    end
  end

end

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Editing: util.rb

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