Module Gem
In: lib/rubygems/defaults.rb
lib/rubygems/gem_openssl.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 = VERSION = '1.3.5'
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 242
242:   def self.activate(gem, *version_requirements)
243:     if version_requirements.last.is_a?(Hash)
244:       options = version_requirements.pop
245:     else
246:       options = {}
247:     end
248: 
249:     sources = options[:sources] || []
250: 
251:     if version_requirements.empty? then
252:       version_requirements = Gem::Requirement.default
253:     end
254: 
255:     unless gem.respond_to?(:name) and
256:            gem.respond_to?(:version_requirements) then
257:       gem = Gem::Dependency.new(gem, version_requirements)
258:     end
259: 
260:     matches = Gem.source_index.find_name(gem.name, gem.version_requirements)
261:     report_activate_error(gem) if matches.empty?
262: 
263:     if @loaded_specs[gem.name] then
264:       # This gem is already loaded.  If the currently loaded gem is not in the
265:       # list of candidate gems, then we have a version conflict.
266:       existing_spec = @loaded_specs[gem.name]
267: 
268:       unless matches.any? { |spec| spec.version == existing_spec.version } then
269:          sources_message = sources.map { |spec| spec.full_name }
270:          stack_message = @loaded_stacks[gem.name].map { |spec| spec.full_name }
271: 
272:          msg = "can't activate #{gem} for #{sources_message.inspect}, "
273:          msg << "already activated #{existing_spec.full_name} for "
274:          msg << "#{stack_message.inspect}"
275: 
276:          e = Gem::LoadError.new msg
277:          e.name = gem.name
278:          e.version_requirement = gem.version_requirements
279: 
280:          raise e
281:       end
282: 
283:       return false
284:     end
285: 
286:     # new load
287:     spec = matches.last
288:     return false if spec.loaded?
289: 
290:     spec.loaded = true
291:     @loaded_specs[spec.name] = spec
292:     @loaded_stacks[spec.name] = sources.dup
293: 
294:     # Load dependent gems first
295:     spec.runtime_dependencies.each do |dep_gem|
296:       activate dep_gem, :sources => [spec, *sources]
297:     end
298: 
299:     # bin directory must come before library directories
300:     spec.require_paths.unshift spec.bindir if spec.bindir
301: 
302:     require_paths = spec.require_paths.map do |path|
303:       File.join spec.full_gem_path, path
304:     end
305: 
306:     sitelibdir = ConfigMap[:sitelibdir]
307: 
308:     # gem directories must come after -I and ENV['RUBYLIB']
309:     insert_index = load_path_insert_index
310: 
311:     if insert_index then
312:       # gem directories must come after -I and ENV['RUBYLIB']
313:       $LOAD_PATH.insert(insert_index, *require_paths)
314:     else
315:       # we are probably testing in core, -I and RUBYLIB don't apply
316:       $LOAD_PATH.unshift(*require_paths)
317:     end
318: 
319:     return true
320:   end

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

[Source]

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

See if a given gem is available.

[Source]

     # File lib/rubygems.rb, line 350
350:   def self.available?(gem, *requirements)
351:     requirements = Gem::Requirement.default if requirements.empty?
352: 
353:     unless gem.respond_to?(:name) and
354:            gem.respond_to?(:version_requirements) then
355:       gem = Gem::Dependency.new gem, requirements
356:     end
357: 
358:     !Gem.source_index.search(gem).empty?
359:   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 367
367:   def self.bin_path(name, exec_name = nil, *version_requirements)
368:     version_requirements = Gem::Requirement.default if
369:       version_requirements.empty?
370:     spec = Gem.source_index.find_name(name, version_requirements).last
371: 
372:     raise Gem::GemNotFoundException,
373:           "can't find gem #{name} (#{version_requirements})" unless spec
374: 
375:     exec_name ||= spec.default_executable
376: 
377:     unless exec_name
378:       msg = "no default executable for #{spec.full_name}"
379:       raise Gem::Exception, msg
380:     end
381: 
382:     unless spec.executables.include? exec_name
383:       msg = "can't find executable #{exec_name} for #{spec.full_name}"
384:       raise Gem::Exception, msg
385:     end
386: 
387:     File.join(spec.full_gem_path, spec.bindir, exec_name)
388:   end

The mode needed to read a file as straight binary.

[Source]

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

The path where gem executables are to be installed.

[Source]

     # File lib/rubygems.rb, line 400
400:   def self.bindir(install_dir=Gem.dir)
401:     return File.join(install_dir, 'bin') unless
402:       install_dir.to_s == Gem.default_dir
403:     Gem.default_bindir
404:   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 411
411:   def self.clear_paths
412:     @gem_home = nil
413:     @gem_path = nil
414:     @user_home = nil
415: 
416:     @@source_index = nil
417: 
418:     MUTEX.synchronize do
419:       @searcher = nil
420:     end
421:   end

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

[Source]

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

The standard configuration object for gems.

[Source]

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

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

[Source]

     # File lib/rubygems.rb, line 441
441:   def self.configuration=(config)
442:     @configuration = config
443:   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 449
449:   def self.datadir(gem_name)
450:     spec = @loaded_specs[gem_name]
451:     return nil if spec.nil?
452:     File.join(spec.full_gem_path, 'data', gem_name)
453:   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 458
458:   def self.deflate(data)
459:     require 'zlib'
460:     Zlib::Deflate.deflate data
461:   end

The path where gems are to be installed.

[Source]

     # File lib/rubygems.rb, line 466
466:   def self.dir
467:     @gem_home ||= nil
468:     set_home(ENV['GEM_HOME'] || Gem.configuration.home || default_dir) unless @gem_home
469:     @gem_home
470:   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 499
499:   def self.ensure_gem_subdirectories(gemdir)
500:     require 'fileutils'
501: 
502:     Gem::DIRECTORIES.each do |filename|
503:       fn = File.join gemdir, filename
504:       FileUtils.mkdir_p fn rescue nil unless File.exist? fn
505:     end
506:   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 519
519:   def self.find_files(path)
520:     load_path_files = $LOAD_PATH.map do |load_path|
521:       files = Dir["#{File.expand_path path, load_path}#{Gem.suffix_pattern}"]
522: 
523:       files.select do |load_path_file|
524:         File.file? load_path_file.untaint
525:       end
526:     end.flatten
527: 
528:     specs = searcher.find_all path
529: 
530:     specs_files = specs.map do |spec|
531:       searcher.matching_files spec, path
532:     end.flatten
533: 
534:     (load_path_files + specs_files).flatten.uniq
535:   end

Zlib::GzipReader wrapper that unzips data.

[Source]

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

Zlib::GzipWriter wrapper that zips data.

[Source]

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

A Zlib::Inflate#inflate wrapper

[Source]

     # File lib/rubygems.rb, line 597
597:   def self.inflate(data)
598:     require 'zlib'
599:     Zlib::Inflate.inflate data
600:   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 606
606:   def self.latest_load_paths
607:     result = []
608: 
609:     Gem.path.each do |gemdir|
610:       each_load_path(latest_partials(gemdir)) do |load_path|
611:         result << load_path
612:       end
613:     end
614: 
615:     result
616:   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 645
645:   def self.load_path_insert_index
646:     index = $LOAD_PATH.index ConfigMap[:sitelibdir]
647: 
648:     $LOAD_PATH.each_with_index do |path, i|
649:       if path.instance_variables.include?(:@gem_prelude_index) or
650:         path.instance_variables.include?('@gem_prelude_index') then
651:         index = i
652:         break
653:       end
654:     end
655: 
656:     index
657:   end

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

[Source]

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

The version of the Marshal format for your Ruby.

[Source]

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

Array of paths to search for Gems.

[Source]

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

Array of platforms this RubyGems supports.

[Source]

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

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

[Source]

     # File lib/rubygems.rb, line 699
699:   def self.platforms=(platforms)
700:     @platforms = platforms
701:   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 718
718:   def self.post_install(&hook)
719:     @post_install_hooks << hook
720:   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 727
727:   def self.post_uninstall(&hook)
728:     @post_uninstall_hooks << hook
729:   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 735
735:   def self.pre_install(&hook)
736:     @pre_install_hooks << hook
737:   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 744
744:   def self.pre_uninstall(&hook)
745:     @pre_uninstall_hooks << hook
746:   end

The directory prefix this RubyGems was installed at.

[Source]

     # File lib/rubygems.rb, line 751
751:   def self.prefix
752:     prefix = File.dirname File.expand_path(__FILE__)
753: 
754:     if File.dirname(prefix) == File.expand_path(ConfigMap[:sitelibdir]) or
755:        File.dirname(prefix) == File.expand_path(ConfigMap[:libdir]) or
756:        'lib' != File.basename(prefix) then
757:       nil
758:     else
759:       File.dirname prefix
760:     end
761:   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 768
768:   def self.promote_load_path(gem_name, over_name)
769:     gem = Gem.loaded_specs[gem_name]
770:     over = Gem.loaded_specs[over_name]
771: 
772:     raise ArgumentError, "gem #{gem_name} is not activated" if gem.nil?
773:     raise ArgumentError, "gem #{over_name} is not activated" if over.nil?
774: 
775:     last_gem_path = File.join gem.full_gem_path, gem.require_paths.last
776: 
777:     over_paths = over.require_paths.map do |path|
778:       File.join over.full_gem_path, path
779:     end
780: 
781:     over_paths.each do |path|
782:       $LOAD_PATH.delete path
783:     end
784: 
785:     gem = $LOAD_PATH.index(last_gem_path) + 1
786: 
787:     $LOAD_PATH.insert(gem, *over_paths)
788:   end

Safely read a file in binary mode on all platforms.

[Source]

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

Refresh source_index from disk and clear searcher.

[Source]

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

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

[Source]

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

The path to the running Ruby interpreter.

[Source]

     # File lib/rubygems.rb, line 855
855:   def self.ruby
856:     if @ruby.nil? then
857:       @ruby = File.join(ConfigMap[:bindir],
858:                         ConfigMap[:ruby_install_name])
859:       @ruby << ConfigMap[:EXEEXT]
860: 
861:       # escape string in case path to ruby executable contain spaces.
862:       @ruby.sub!(/.*\s.*/m, '"\&"')
863:     end
864: 
865:     @ruby
866:   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 871
871:   def self.ruby_version
872:     return @ruby_version if defined? @ruby_version
873:     version = RUBY_VERSION.dup
874: 
875:     if defined?(RUBY_PATCHLEVEL) && RUBY_PATCHLEVEL != -1 then
876:       version << ".#{RUBY_PATCHLEVEL}"
877:     elsif defined?(RUBY_REVISION) then
878:       version << ".dev.#{RUBY_REVISION}"
879:     end
880: 
881:     @ruby_version = Gem::Version.new version
882:   end

The GemPathSearcher object used to search for matching installed gems.

[Source]

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

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

[Source]

     # File lib/rubygems.rb, line 943
943:   def self.source_index
944:     @@source_index ||= SourceIndex.from_installed_gems
945:   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 952
952:   def self.sources
953:     if @sources.empty? then
954:       begin
955:         gem 'sources', '> 0.0.1'
956:         require 'sources'
957:       rescue LoadError
958:         @sources = default_sources
959:       end
960:     end
961: 
962:     @sources
963:   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 969
969:   def self.sources=(new_sources)
970:     @sources = new_sources
971:   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 976
976:   def self.suffix_pattern
977:     @suffix_pattern ||= "{#{suffixes.join(',')}}"
978:   end

Suffixes for require-able paths.

[Source]

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

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

[Source]

      # File lib/rubygems.rb, line 991
 991:   def self.time(msg, width = 0, display = Gem.configuration.verbose)
 992:     now = Time.now
 993: 
 994:     value = yield
 995: 
 996:     elapsed = Time.now - now
 997: 
 998:     ui.say "%2$*1$s: %3$3.3fs" % [-width, msg, elapsed] if display
 999: 
1000:     value
1001:   end

Lazily loads DefaultUserInteraction and returns the default UI.

[Source]

      # File lib/rubygems.rb, line 1006
1006:   def self.ui
1007:     require 'rubygems/user_interaction'
1008: 
1009:     Gem::DefaultUserInteraction.ui
1010:   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 1016
1016:   def self.use_paths(home, paths=[])
1017:     clear_paths
1018:     set_home(home) if home
1019:     set_paths(paths.join(File::PATH_SEPARATOR)) if paths
1020:   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 1025
1025:   def self.user_home
1026:     @user_home ||= find_home
1027:   end

Is this a windows platform?

[Source]

      # File lib/rubygems.rb, line 1032
1032:   def self.win_platform?
1033:     if @@win_platform.nil? then
1034:       @@win_platform = !!WIN_PATTERNS.find { |r| RUBY_PLATFORM =~ r }
1035:     end
1036: 
1037:     @@win_platform
1038:   end

[Validate]