Module Gem
In: lib/rubygems/defaults.rb
lib/rubygems/gem_openssl.rb
lib/rubygems/rubygems_version.rb
lib/rubygems.rb

RubyGems is the Ruby standard for publishing and managing third party libraries.

For user documentation, see:

For gem developer documentation see:

Further RubyGems documentation can be found at:

RubyGems Plugins

As of RubyGems 1.3.2, RubyGems will load plugins installed in gems or $LOAD_PATH. Plugins must be named ‘rubygems_plugin’ are discovered via Gem::find_files then loaded. Take care when implementing a plugin as your plugin file may be loaded multiple times if multiple versions of your gem are installed.

For an example plugin, see the graph gem which adds a `gem graph` command.

RubyGems Defaults, Packaging

RubyGems defaults are stored in rubygems/defaults.rb. If you‘re packaging RubyGems or implementing Ruby you can change RubyGems’ defaults.

For RubyGems packagers, provide lib/rubygems/operating_system.rb and override any defaults from lib/rubygems/defaults.rb.

For Ruby implementers, provide lib/rubygems/#{RUBY_ENGINE}.rb and override any defaults from lib/rubygems/defaults.rb.

If you need RubyGems to perform extra work on install or uninstall, your defaults override file can set pre and post install and uninstall hooks. See Gem::pre_install, Gem::pre_uninstall, Gem::post_install, Gem::post_uninstall.

Bugs

You can submit bugs to the RubyGems bug tracker on RubyForge

Credits

RubyGems is currently maintained by Eric Hodel.

RubyGems was originally developed at RubyConf 2003 by:

  • Rich Kilmer — rich(at)infoether.com
  • Chad Fowler — chad(at)chadfowler.com
  • David Black — dblack(at)wobblini.net
  • Paul Brannan — paul(at)atdesk.com
  • Jim Weirch — jim(at)weirichhouse.org

Contributors:

  • Gavin Sinclair — gsinclair(at)soyabean.com.au
  • George Marrows — george.marrows(at)ntlworld.com
  • Dick Davies — rasputnik(at)hellooperator.net
  • Mauricio Fernandez — batsman.geo(at)yahoo.com
  • Simon Strandgaard — neoneye(at)adslhome.dk
  • Dave Glasser — glasser(at)mit.edu
  • Paul Duncan — pabs(at)pablotron.org
  • Ville Aine — vaine(at)cs.helsinki.fi
  • Eric Hodel — drbrain(at)segment7.net
  • Daniel Berger — djberg96(at)gmail.com
  • Phil Hagelberg — technomancy(at)gmail.com
  • Ryan Davis

(If your name is missing, PLEASE let us know!)

Thanks!

-The RubyGems Team

Methods

Classes and Modules

Module Gem::Commands
Module Gem::DefaultUserInteraction
Module Gem::Ext
Module Gem::InstallUpdateOptions
Module Gem::LocalRemoteOptions
Module Gem::Package
Module Gem::RequirePathsBuilder
Module Gem::Security
Module Gem::Text
Module Gem::UserInteraction
Module Gem::VersionOption
Class Gem::Builder
Class Gem::Command
Class Gem::CommandLineError
Class Gem::CommandManager
Class Gem::ConfigFile
Class Gem::ConsoleUI
Class Gem::Dependency
Class Gem::DependencyError
Class Gem::DependencyInstaller
Class Gem::DependencyList
Class Gem::DependencyRemovalException
Class Gem::DigestAdapter
Class Gem::DocManager
Class Gem::DocumentError
Class Gem::EndOfYAMLException
Class Gem::Exception
Class Gem::FakeFetcher
Class Gem::FileOperations
Class Gem::FilePermissionError
Class Gem::Format
Class Gem::FormatException
Class Gem::GemNotFoundException
Class Gem::GemNotInHomeException
Class Gem::GemPathSearcher
Class Gem::GemRunner
Class Gem::Indexer
Class Gem::InstallError
Class Gem::Installer
Class Gem::InvalidSpecificationException
Class Gem::LoadError
Class Gem::OldFormat
Class Gem::OperationNotSupportedError
Class Gem::PackageTask
Class Gem::Platform
Class Gem::RemoteError
Class Gem::RemoteFetcher
Class Gem::RemoteInstallationCancelled
Class Gem::RemoteInstallationSkipped
Class Gem::RemoteSourceException
Class Gem::Requirement
Class Gem::Server
Class Gem::SilentUI
Class Gem::SourceIndex
Class Gem::SourceInfoCache
Class Gem::SourceInfoCacheEntry
Class Gem::SpecFetcher
Class Gem::Specification
Class Gem::StreamUI
Class Gem::SystemExitException
Class Gem::Uninstaller
Class Gem::Validator
Class Gem::VerificationError
Class Gem::Version

Constants

RubyGemsVersion = '1.3.4'   The version of RubyGems you are using
VERSION = RubyGemsVersion   The version of RubyGems you are using (duplicated for familiarity)
ConfigMap = {} unless defined?(ConfigMap)   Configuration settings from ::RbConfig
DIRECTORIES = %w[cache doc gems specifications] unless defined?(DIRECTORIES)   Default directories in a gem repository
WIN_PATTERNS = [ /bccwin/i, /cygwin/i, /djgpp/i, /mingw/i, /mswin/i, /wince/i, ]   An Array of Regexps that match windows ruby platforms.
MARSHAL_SPEC_DIR = "quick/Marshal.#{Gem.marshal_version}/"   Location of Marshal quick gemspecs on remote repositories
YAML_SPEC_DIR = 'quick/'   Location of legacy YAML quick gemspecs on remote repositories

Attributes

loaded_specs  [R]  Hash of loaded Gem::Specification keyed by name
post_install_hooks  [R]  The list of hooks to be run before Gem::Install#install does any work
post_uninstall_hooks  [R]  The list of hooks to be run before Gem::Uninstall#uninstall does any work
pre_install_hooks  [R]  The list of hooks to be run after Gem::Install#install is finished
pre_uninstall_hooks  [R]  The list of hooks to be run after Gem::Uninstall#uninstall is finished
ssl_available  [W]  Is SSL available?

Public Class methods

Activates an installed gem matching gem. The gem must satisfy version_requirements.

Returns true if the gem is activated, false if it is already loaded, or an exception otherwise.

Gem#activate adds the library paths in gem to $LOAD_PATH. Before a Gem is activated its required Gems are activated. If the version information is omitted, the highest version Gem of the supplied name is loaded. If a Gem is not found that meets the version requirements or a required Gem is not found, a Gem::LoadError is raised.

More information on version requirements can be found in the Gem::Requirement and Gem::Version documentation.

[Source]

     # File lib/rubygems.rb, line 241
241:   def self.activate(gem, *version_requirements)
242:     if version_requirements.last.is_a?(Hash)
243:       options = version_requirements.pop
244:     else
245:       options = {}
246:     end
247: 
248:     sources = options[:sources] || []
249: 
250:     if version_requirements.empty? then
251:       version_requirements = Gem::Requirement.default
252:     end
253: 
254:     unless gem.respond_to?(:name) and
255:            gem.respond_to?(:version_requirements) then
256:       gem = Gem::Dependency.new(gem, version_requirements)
257:     end
258: 
259:     matches = Gem.source_index.find_name(gem.name, gem.version_requirements)
260:     report_activate_error(gem) if matches.empty?
261: 
262:     if @loaded_specs[gem.name] then
263:       # This gem is already loaded.  If the currently loaded gem is not in the
264:       # list of candidate gems, then we have a version conflict.
265:       existing_spec = @loaded_specs[gem.name]
266: 
267:       unless matches.any? { |spec| spec.version == existing_spec.version } then
268:          sources_message = sources.map { |spec| spec.full_name }
269:          stack_message = @loaded_stacks[gem.name].map { |spec| spec.full_name }
270: 
271:          msg = "can't activate #{gem} for #{sources_message.inspect}, "
272:          msg << "already activated #{existing_spec.full_name} for "
273:          msg << "#{stack_message.inspect}"
274: 
275:          e = Gem::LoadError.new msg
276:          e.name = gem.name
277:          e.version_requirement = gem.version_requirements
278: 
279:          raise e
280:       end
281: 
282:       return false
283:     end
284: 
285:     # new load
286:     spec = matches.last
287:     return false if spec.loaded?
288: 
289:     spec.loaded = true
290:     @loaded_specs[spec.name] = spec
291:     @loaded_stacks[spec.name] = sources.dup
292: 
293:     # Load dependent gems first
294:     spec.runtime_dependencies.each do |dep_gem|
295:       activate dep_gem, :sources => [spec, *sources]
296:     end
297: 
298:     # bin directory must come before library directories
299:     spec.require_paths.unshift spec.bindir if spec.bindir
300: 
301:     require_paths = spec.require_paths.map do |path|
302:       File.join spec.full_gem_path, path
303:     end
304: 
305:     sitelibdir = ConfigMap[:sitelibdir]
306: 
307:     # gem directories must come after -I and ENV['RUBYLIB']
308:     insert_index = load_path_insert_index
309: 
310:     if insert_index then
311:       # gem directories must come after -I and ENV['RUBYLIB']
312:       $LOAD_PATH.insert(insert_index, *require_paths)
313:     else
314:       # we are probably testing in core, -I and RUBYLIB don't apply
315:       $LOAD_PATH.unshift(*require_paths)
316:     end
317: 
318:     return true
319:   end

An Array of all possible load paths for all versions of all gems in the Gem installation.

[Source]

     # File lib/rubygems.rb, line 325
325:   def self.all_load_paths
326:     result = []
327: 
328:     Gem.path.each do |gemdir|
329:       each_load_path all_partials(gemdir) do |load_path|
330:         result << load_path
331:       end
332:     end
333: 
334:     result
335:   end

See if a given gem is available.

[Source]

     # File lib/rubygems.rb, line 349
349:   def self.available?(gem, *requirements)
350:     requirements = Gem::Requirement.default if requirements.empty?
351: 
352:     unless gem.respond_to?(:name) and
353:            gem.respond_to?(:version_requirements) then
354:       gem = Gem::Dependency.new gem, requirements
355:     end
356: 
357:     !Gem.source_index.search(gem).empty?
358:   end

Find the full path to the executable for gem name. If the exec_name is not given, the gem‘s default_executable is chosen, otherwise the specifed executable‘s path is returned. version_requirements allows you to specify specific gem versions.

[Source]

     # File lib/rubygems.rb, line 366
366:   def self.bin_path(name, exec_name = nil, *version_requirements)
367:     version_requirements = Gem::Requirement.default if
368:       version_requirements.empty?
369:     spec = Gem.source_index.find_name(name, version_requirements).last
370: 
371:     raise Gem::GemNotFoundException,
372:           "can't find gem #{name} (#{version_requirements})" unless spec
373: 
374:     exec_name ||= spec.default_executable
375: 
376:     unless exec_name
377:       msg = "no default executable for #{spec.full_name}"
378:       raise Gem::Exception, msg
379:     end
380: 
381:     unless spec.executables.include? exec_name
382:       msg = "can't find executable #{exec_name} for #{spec.full_name}"
383:       raise Gem::Exception, msg
384:     end
385: 
386:     File.join(spec.full_gem_path, spec.bindir, exec_name).sub(/.*\s.*/m, '"\&"')
387:   end

The mode needed to read a file as straight binary.

[Source]

     # File lib/rubygems.rb, line 392
392:   def self.binary_mode
393:     @binary_mode ||= RUBY_VERSION > '1.9' ? 'rb:ascii-8bit' : 'rb'
394:   end

The path where gem executables are to be installed.

[Source]

     # File lib/rubygems.rb, line 399
399:   def self.bindir(install_dir=Gem.dir)
400:     return File.join(install_dir, 'bin') unless
401:       install_dir.to_s == Gem.default_dir
402:     Gem.default_bindir
403:   end

Reset the dir and path values. The next time dir or path is requested, the values will be calculated from scratch. This is mainly used by the unit tests to provide test isolation.

[Source]

     # File lib/rubygems.rb, line 410
410:   def self.clear_paths
411:     @gem_home = nil
412:     @gem_path = nil
413:     @user_home = nil
414: 
415:     @@source_index = nil
416: 
417:     MUTEX.synchronize do
418:       @searcher = nil
419:     end
420:   end

The path to standard location of the user‘s .gemrc file.

[Source]

     # File lib/rubygems.rb, line 425
425:   def self.config_file
426:     File.join Gem.user_home, '.gemrc'
427:   end

The standard configuration object for gems.

[Source]

     # File lib/rubygems.rb, line 432
432:   def self.configuration
433:     @configuration ||= Gem::ConfigFile.new []
434:   end

Use the given configuration object (which implements the ConfigFile protocol) as the standard configuration object.

[Source]

     # File lib/rubygems.rb, line 440
440:   def self.configuration=(config)
441:     @configuration = config
442:   end

The path the the data directory specified by the gem name. If the package is not available as a gem, return nil.

[Source]

     # File lib/rubygems.rb, line 448
448:   def self.datadir(gem_name)
449:     spec = @loaded_specs[gem_name]
450:     return nil if spec.nil?
451:     File.join(spec.full_gem_path, 'data', gem_name)
452:   end

The default directory for binaries Debian patch:

  /var/lib/gems/{ruby version}/bin is the default path in Debian system

[Source]

    # File lib/rubygems/defaults.rb, line 67
67:   def self.default_bindir
68:     File.join('/', 'var', 'lib', 'gems', ConfigMap[:ruby_version], 'bin')
69:   end

Default home directory path to be used if an alternate value is not specified in the environment

Debian patch: search order of this directory.

  1. GEM_HOME enviroment variable
     (Using this, Gems are to be installed in any path as you like)
  2. /var/lib/gems/{ruby version} (This is the default path in Debian system)

[Source]

    # File lib/rubygems/defaults.rb, line 25
25:   def self.default_dir
26:     File.join('/', 'var', 'lib', 'gems', ConfigMap[:ruby_version])
27:   end

Deduce Ruby‘s —program-prefix and —program-suffix from its install name

[Source]

    # File lib/rubygems/defaults.rb, line 51
51:   def self.default_exec_format
52:     exec_format = ConfigMap[:ruby_install_name].sub('ruby', '%s') rescue '%s'
53: 
54:     unless exec_format =~ /%s/ then
55:       raise Gem::Exception,
56:         "[BUG] invalid exec_format #{exec_format.inspect}, no %s"
57:     end
58: 
59:     exec_format
60:   end

Default gem load path

[Source]

    # File lib/rubygems/defaults.rb, line 40
40:   def self.default_path
41:     if File.exist?(Gem.user_home)
42:       [user_dir, default_dir]
43:     else
44:       [default_dir]
45:     end
46:   end

An Array of the default sources that come with RubyGems

[Source]

    # File lib/rubygems/defaults.rb, line 11
11:   def self.default_sources
12:     %w[http://gems.rubyforge.org/]
13:   end

The default system-wide source info cache directory

[Source]

    # File lib/rubygems/defaults.rb, line 74
74:   def self.default_system_source_cache_dir
75:     File.join Gem.dir, 'source_cache'
76:   end

The default user-specific source info cache directory

[Source]

    # File lib/rubygems/defaults.rb, line 81
81:   def self.default_user_source_cache_dir
82:     File.join Gem.user_home, '.gem', 'source_cache'
83:   end

A Zlib::Deflate.deflate wrapper

[Source]

     # File lib/rubygems.rb, line 457
457:   def self.deflate(data)
458:     require 'zlib'
459:     Zlib::Deflate.deflate data
460:   end

The path where gems are to be installed.

[Source]

     # File lib/rubygems.rb, line 465
465:   def self.dir
466:     @gem_home ||= nil
467:     set_home(ENV['GEM_HOME'] || Gem.configuration.home || default_dir) unless @gem_home
468:     @gem_home
469:   end

Quietly ensure the named Gem directory contains all the proper subdirectories. If we can‘t create a directory due to a permission problem, then we will silently continue.

[Source]

     # File lib/rubygems.rb, line 498
498:   def self.ensure_gem_subdirectories(gemdir)
499:     require 'fileutils'
500: 
501:     Gem::DIRECTORIES.each do |filename|
502:       fn = File.join gemdir, filename
503:       FileUtils.mkdir_p fn rescue nil unless File.exist? fn
504:     end
505:   end

Ensure that SSL is available. Throw an exception if it is not.

[Source]

    # File lib/rubygems/gem_openssl.rb, line 31
31:     def ensure_ssl_available
32:       unless ssl_available?
33:         fail Gem::Exception, "SSL is not installed on this system"
34:       end
35:     end

Returns a list of paths matching file that can be used by a gem to pick up features from other gems. For example:

  Gem.find_files('rdoc/discover').each do |path| load path end

find_files search $LOAD_PATH for files as well as gems.

Note that find_files will return all files even if they are from different versions of the same gem.

[Source]

     # File lib/rubygems.rb, line 518
518:   def self.find_files(path)
519:     load_path_files = $LOAD_PATH.map do |load_path|
520:       files = Dir["#{File.expand_path path, load_path}#{Gem.suffix_pattern}"]
521: 
522:       files.select do |load_path_file|
523:         File.file? load_path_file.untaint
524:       end
525:     end.flatten
526: 
527:     specs = searcher.find_all path
528: 
529:     specs_files = specs.map do |spec|
530:       searcher.matching_files spec, path
531:     end.flatten
532: 
533:     (load_path_files + specs_files).flatten.uniq
534:   end

Zlib::GzipReader wrapper that unzips data.

[Source]

     # File lib/rubygems.rb, line 572
572:   def self.gunzip(data)
573:     require 'stringio'
574:     require 'zlib'
575:     data = StringIO.new data
576: 
577:     Zlib::GzipReader.new(data).read
578:   end

Zlib::GzipWriter wrapper that zips data.

[Source]

     # File lib/rubygems.rb, line 583
583:   def self.gzip(data)
584:     require 'stringio'
585:     require 'zlib'
586:     zipped = StringIO.new
587: 
588:     Zlib::GzipWriter.wrap zipped do |io| io.write data end
589: 
590:     zipped.string
591:   end

A Zlib::Inflate#inflate wrapper

[Source]

     # File lib/rubygems.rb, line 596
596:   def self.inflate(data)
597:     require 'zlib'
598:     Zlib::Inflate.inflate data
599:   end

Return a list of all possible load paths for the latest version for all gems in the Gem installation.

[Source]

     # File lib/rubygems.rb, line 605
605:   def self.latest_load_paths
606:     result = []
607: 
608:     Gem.path.each do |gemdir|
609:       each_load_path(latest_partials(gemdir)) do |load_path|
610:         result << load_path
611:       end
612:     end
613: 
614:     result
615:   end

The index to insert activated gem paths into the $LOAD_PATH.

Defaults to the site lib directory unless gem_prelude.rb has loaded paths, then it inserts the activated gem‘s paths before the gem_prelude.rb paths so you can override the gem_prelude.rb default $LOAD_PATH paths.

[Source]

     # File lib/rubygems.rb, line 644
644:   def self.load_path_insert_index
645:     index = $LOAD_PATH.index ConfigMap[:sitelibdir]
646: 
647:     $LOAD_PATH.each_with_index do |path, i|
648:       if path.instance_variables.include?(:@gem_prelude_index) or
649:         path.instance_variables.include?('@gem_prelude_index') then
650:         index = i
651:         break
652:       end
653:     end
654: 
655:     index
656:   end

The file name and line number of the caller of the caller of this method.

[Source]

     # File lib/rubygems.rb, line 661
661:   def self.location_of_caller
662:     caller[1] =~ /(.*?):(\d+).*?$/i
663:     file = $1
664:     lineno = $2.to_i
665: 
666:     [file, lineno]
667:   end

The version of the Marshal format for your Ruby.

[Source]

     # File lib/rubygems.rb, line 672
672:   def self.marshal_version
673:     "#{Marshal::MAJOR_VERSION}.#{Marshal::MINOR_VERSION}"
674:   end

Array of paths to search for Gems.

[Source]

     # File lib/rubygems.rb, line 679
679:   def self.path
680:     @gem_path ||= nil
681: 
682:     unless @gem_path then
683:       paths = [ENV['GEM_PATH'] || Gem.configuration.path || default_path]
684: 
685:       if defined?(APPLE_GEM_HOME) and not ENV['GEM_PATH'] then
686:         paths << APPLE_GEM_HOME
687:       end
688: 
689:       set_paths paths.compact.join(File::PATH_SEPARATOR)
690:     end
691: 
692:     @gem_path
693:   end

Array of platforms this RubyGems supports.

[Source]

     # File lib/rubygems.rb, line 705
705:   def self.platforms
706:     @platforms ||= []
707:     if @platforms.empty?
708:       @platforms = [Gem::Platform::RUBY, Gem::Platform.local]
709:     end
710:     @platforms
711:   end

Set array of platforms this RubyGems supports (primarily for testing).

[Source]

     # File lib/rubygems.rb, line 698
698:   def self.platforms=(platforms)
699:     @platforms = platforms
700:   end

Adds a post-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called

[Source]

     # File lib/rubygems.rb, line 717
717:   def self.post_install(&hook)
718:     @post_install_hooks << hook
719:   end

Adds a post-uninstall hook that will be passed a Gem::Uninstaller instance and the spec that was uninstalled when Gem::Uninstaller#uninstall is called

[Source]

     # File lib/rubygems.rb, line 726
726:   def self.post_uninstall(&hook)
727:     @post_uninstall_hooks << hook
728:   end

Adds a pre-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called

[Source]

     # File lib/rubygems.rb, line 734
734:   def self.pre_install(&hook)
735:     @pre_install_hooks << hook
736:   end

Adds a pre-uninstall hook that will be passed an Gem::Uninstaller instance and the spec that will be uninstalled when Gem::Uninstaller#uninstall is called

[Source]

     # File lib/rubygems.rb, line 743
743:   def self.pre_uninstall(&hook)
744:     @pre_uninstall_hooks << hook
745:   end

The directory prefix this RubyGems was installed at.

[Source]

     # File lib/rubygems.rb, line 750
750:   def self.prefix
751:     prefix = File.dirname File.expand_path(__FILE__)
752: 
753:     if File.dirname(prefix) == File.expand_path(ConfigMap[:sitelibdir]) or
754:        File.dirname(prefix) == File.expand_path(ConfigMap[:libdir]) or
755:        'lib' != File.basename(prefix) then
756:       nil
757:     else
758:       File.dirname prefix
759:     end
760:   end

Promotes the load paths of the gem_name over the load paths of over_name. Useful for allowing one gem to override features in another using find_files.

[Source]

     # File lib/rubygems.rb, line 767
767:   def self.promote_load_path(gem_name, over_name)
768:     gem = Gem.loaded_specs[gem_name]
769:     over = Gem.loaded_specs[over_name]
770: 
771:     raise ArgumentError, "gem #{gem_name} is not activated" if gem.nil?
772:     raise ArgumentError, "gem #{over_name} is not activated" if over.nil?
773: 
774:     last_gem_path = File.join gem.full_gem_path, gem.require_paths.last
775: 
776:     over_paths = over.require_paths.map do |path|
777:       File.join over.full_gem_path, path
778:     end
779: 
780:     over_paths.each do |path|
781:       $LOAD_PATH.delete path
782:     end
783: 
784:     gem = $LOAD_PATH.index(last_gem_path) + 1
785: 
786:     $LOAD_PATH.insert(gem, *over_paths)
787:   end

Safely read a file in binary mode on all platforms.

[Source]

     # File lib/rubygems.rb, line 803
803:   def self.read_binary(path)
804:     File.open path, binary_mode do |f| f.read end
805:   end

Refresh source_index from disk and clear searcher.

[Source]

     # File lib/rubygems.rb, line 792
792:   def self.refresh
793:     source_index.refresh!
794: 
795:     MUTEX.synchronize do
796:       @searcher = nil
797:     end
798:   end

Full path to libfile in gemname. Searches for the latest gem unless requirements is given.

[Source]

     # File lib/rubygems.rb, line 835
835:   def self.required_location(gemname, libfile, *requirements)
836:     requirements = Gem::Requirement.default if requirements.empty?
837: 
838:     matches = Gem.source_index.find_name gemname, requirements
839: 
840:     return nil if matches.empty?
841: 
842:     spec = matches.last
843:     spec.require_paths.each do |path|
844:       result = File.join spec.full_gem_path, path, libfile
845:       return result if File.exist? result
846:     end
847: 
848:     nil
849:   end

The path to the running Ruby interpreter.

[Source]

     # File lib/rubygems.rb, line 854
854:   def self.ruby
855:     if @ruby.nil? then
856:       @ruby = File.join(ConfigMap[:bindir],
857:                         ConfigMap[:ruby_install_name])
858:       @ruby << ConfigMap[:EXEEXT]
859: 
860:       # escape string in case path to ruby executable contain spaces.
861:       @ruby.sub!(/.*\s.*/m, '"\&"')
862:     end
863: 
864:     @ruby
865:   end

A wrapper around RUBY_ENGINE const that may not be defined

[Source]

    # File lib/rubygems/defaults.rb, line 88
88:   def self.ruby_engine
89:     if defined? RUBY_ENGINE then
90:       RUBY_ENGINE
91:     else
92:       'ruby'
93:     end
94:   end

A Gem::Version for the currently running ruby.

[Source]

     # File lib/rubygems.rb, line 870
870:   def self.ruby_version
871:     return @ruby_version if defined? @ruby_version
872:     version = RUBY_VERSION.dup
873: 
874:     if defined?(RUBY_PATCHLEVEL) && RUBY_PATCHLEVEL != -1 then
875:       version << ".#{RUBY_PATCHLEVEL}"
876:     elsif defined?(RUBY_REVISION) then
877:       version << ".dev.#{RUBY_REVISION}"
878:     end
879: 
880:     @ruby_version = Gem::Version.new version
881:   end

The GemPathSearcher object used to search for matching installed gems.

[Source]

     # File lib/rubygems.rb, line 886
886:   def self.searcher
887:     MUTEX.synchronize do
888:       @searcher ||= Gem::GemPathSearcher.new
889:     end
890:   end

Returns the Gem::SourceIndex of specifications that are in the Gem.path

[Source]

     # File lib/rubygems.rb, line 942
942:   def self.source_index
943:     @@source_index ||= SourceIndex.from_installed_gems
944:   end

Returns an Array of sources to fetch remote gems from. If the sources list is empty, attempts to load the "sources" gem, then uses default_sources if it is not installed.

[Source]

     # File lib/rubygems.rb, line 951
951:   def self.sources
952:     if @sources.empty? then
953:       begin
954:         gem 'sources', '> 0.0.1'
955:         require 'sources'
956:       rescue LoadError
957:         @sources = default_sources
958:       end
959:     end
960: 
961:     @sources
962:   end

Need to be able to set the sources without calling Gem.sources.replace since that would cause an infinite loop.

[Source]

     # File lib/rubygems.rb, line 968
968:   def self.sources=(new_sources)
969:     @sources = new_sources
970:   end

Is SSL (used by the signing commands) available on this platform?

[Source]

    # File lib/rubygems/gem_openssl.rb, line 19
19:     def ssl_available?
20:       @ssl_available
21:     end

Glob pattern for require-able path suffixes.

[Source]

     # File lib/rubygems.rb, line 975
975:   def self.suffix_pattern
976:     @suffix_pattern ||= "{#{suffixes.join(',')}}"
977:   end

Suffixes for require-able paths.

[Source]

     # File lib/rubygems.rb, line 982
982:   def self.suffixes
983:     ['', '.rb', '.rbw', '.so', '.bundle', '.dll', '.sl', '.jar']
984:   end

Prints the amount of time the supplied block takes to run using the debug UI output.

[Source]

      # File lib/rubygems.rb, line 990
 990:   def self.time(msg, width = 0, display = Gem.configuration.verbose)
 991:     now = Time.now
 992: 
 993:     value = yield
 994: 
 995:     elapsed = Time.now - now
 996: 
 997:     ui.say "%2$*1$s: %3$3.3fs" % [-width, msg, elapsed] if display
 998: 
 999:     value
1000:   end

Lazily loads DefaultUserInteraction and returns the default UI.

[Source]

      # File lib/rubygems.rb, line 1005
1005:   def self.ui
1006:     require 'rubygems/user_interaction'
1007: 
1008:     Gem::DefaultUserInteraction.ui
1009:   end

Use the home and paths values for Gem.dir and Gem.path. Used mainly by the unit tests to provide environment isolation.

[Source]

      # File lib/rubygems.rb, line 1015
1015:   def self.use_paths(home, paths=[])
1016:     clear_paths
1017:     set_home(home) if home
1018:     set_paths(paths.join(File::PATH_SEPARATOR)) if paths
1019:   end

Path for gems in the user‘s home directory

[Source]

    # File lib/rubygems/defaults.rb, line 32
32:   def self.user_dir
33:     File.join(Gem.user_home, '.gem', ruby_engine,
34:               ConfigMap[:ruby_version])
35:   end

The home directory for the user.

[Source]

      # File lib/rubygems.rb, line 1024
1024:   def self.user_home
1025:     @user_home ||= find_home
1026:   end

Is this a windows platform?

[Source]

      # File lib/rubygems.rb, line 1031
1031:   def self.win_platform?
1032:     if @@win_platform.nil? then
1033:       @@win_platform = !!WIN_PATTERNS.find { |r| RUBY_PLATFORM =~ r }
1034:     end
1035: 
1036:     @@win_platform
1037:   end

[Validate]