Revert "Update to RubyGems 2.4.5."

This reverts commit 7765f9e.
jruby · Jan 29, 2015 · e835fd1 · e835fd1
1 parent 4e9d414
commit e835fd1
Showing 142 changed files with 2,213 additions and 8,445 deletions.
diff --git a/lib/ruby/shared/gauntlet_rubygems.rb b/lib/ruby/shared/gauntlet_rubygems.rb
@@ -16,7 +16,7 @@
 # rvsh-0.4.5           : No such file or directory - bin/rvsh
 # xen-0.1.2.1          : authors must be Array of Strings
 
-class GemGauntlet < Gauntlet # :nodoc:
+class GemGauntlet < Gauntlet
   def run(name)
     warn name
 

diff --git a/lib/ruby/shared/rubygems.rb b/lib/ruby/shared/rubygems.rb
diff --git a/lib/ruby/shared/rubygems/available_set.rb b/lib/ruby/shared/rubygems/available_set.rb
@@ -4,12 +4,9 @@ class Gem::AvailableSet
 
   Tuple = Struct.new(:spec, :source)
 
-  attr_accessor :remote # :nodoc:
-
   def initialize
     @set = []
     @sorted = nil
-    @remote = true
   end
 
   attr_reader :set
@@ -119,18 +116,18 @@ def to_request_set development = :none
 
   ##
   #
-  # Used by the Resolver, the protocol to use a AvailableSet as a
+  # Used by the DependencyResolver, the protocol to use a AvailableSet as a
   # search Set.
 
   def find_all(req)
     dep = req.dependency
 
     match = @set.find_all do |t|
-      dep.match? t.spec
+      dep.matches_spec? t.spec
     end
 
     match.map do |t|
-      Gem::Resolver::LocalSpecification.new(self, t.spec, t.source)
+      Gem::DependencyResolver::InstalledSpecification.new(self, t.spec, t.source)
     end
   end
 

diff --git a/lib/ruby/shared/rubygems/basic_specification.rb b/lib/ruby/shared/rubygems/basic_specification.rb
@@ -4,31 +4,11 @@
 
 class Gem::BasicSpecification
 
-  ##
-  # Allows installation of extensions for git: gems.
-
-  attr_writer :base_dir # :nodoc:
-
-  ##
-  # Sets the directory where extensions for this gem will be installed.
-
-  attr_writer :extension_dir # :nodoc:
-
-  ##
-  # Is this specification ignored for activation purposes?
-
-  attr_writer :ignored # :nodoc:
-
   ##
   # The path this gemspec was loaded from.  This attribute is not persisted.
 
   attr_reader :loaded_from
 
-  ##
-  # Allows correct activation of git: and path: gems.
-
-  attr_writer :full_gem_path # :nodoc:
-
   def self.default_specifications_dir
     File.join(Gem.default_dir, "specifications", "default")
   end
@@ -58,51 +38,20 @@ def base_dir
   # Return true if this spec can require +file+.
 
   def contains_requirable_file? file
-    @contains_requirable_file ||= {}
-    @contains_requirable_file[file] ||=
-    begin
-      if instance_variable_defined?(:@ignored) or
-         instance_variable_defined?('@ignored') then
-        return false
-      elsif missing_extensions? then
-        @ignored = true
-
-        warn "Ignoring #{full_name} because its extensions are not built.  " +
-             "Try: gem pristine #{name} --version #{version}"
-        return false
-      end
-
-      suffixes = Gem.suffixes
-
-      full_require_paths.any? do |dir|
-        base = "#{dir}/#{file}"
-        suffixes.any? { |suf| File.file? "#{base}#{suf}" }
-      end
-    end ? :yes : :no
-    @contains_requirable_file[file] == :yes
+    root     = full_gem_path
+    suffixes = Gem.suffixes
+
+    require_paths.any? do |lib|
+      base = "#{root}/#{lib}/#{file}"
+      suffixes.any? { |suf| File.file? "#{base}#{suf}" }
+    end
   end
 
   def default_gem?
     loaded_from &&
       File.dirname(loaded_from) == self.class.default_specifications_dir
   end
 
-  ##
-  # Returns full path to the directory where gem's extensions are installed.
-
-  def extension_dir
-    @extension_dir ||= File.expand_path File.join(extensions_dir, full_name)
-  end
-
-  ##
-  # Returns path to the extensions directory.
-
-  def extensions_dir
-    @extensions_dir ||= Gem.default_ext_dir_for(base_dir) ||
-      File.join(base_dir, 'extensions', Gem::Platform.local.to_s,
-                Gem.extension_api_version)
-  end
-
   def find_full_gem_path # :nodoc:
     # TODO: also, shouldn't it default to full_name if it hasn't been written?
     path = File.expand_path File.join(gems_dir, full_name)
@@ -134,53 +83,6 @@ def full_name
     end
   end
 
-  ##
-  # Full paths in the gem to add to <code>$LOAD_PATH</code> when this gem is
-  # activated.
-
-  def full_require_paths
-    @full_require_paths ||=
-    begin
-      full_paths = raw_require_paths.map do |path|
-        File.join full_gem_path, path
-      end
-
-      full_paths.unshift extension_dir unless @extensions.nil? || @extensions.empty?
-
-      full_paths
-    end
-  end
-
-  ##
-  # Full path of the target library file.
-  # If the file is not in this gem, return nil.
-
-  def to_fullpath path
-    if activated? then
-      @paths_map ||= {}
-      @paths_map[path] ||=
-      begin
-        fullpath = nil
-        suffixes = Gem.suffixes
-        full_require_paths.find do |dir|
-          suffixes.find do |suf|
-            File.file?(fullpath = "#{dir}/#{path}#{suf}")
-          end
-        end ? fullpath : nil
-      end
-    else
-      nil
-    end
-  end
-
-  ##
-  # Returns the full path to this spec's gem directory.
-  # eg: /usr/local/lib/ruby/1.8/gems/mygem-1.0
-
-  def gem_dir
-    @gem_dir ||= File.expand_path File.join(gems_dir, full_name)
-  end
-
   ##
   # Returns the full path to the gems directory containing this spec's
   # gem directory. eg: /usr/local/lib/ruby/1.8/gems
@@ -197,12 +99,9 @@ def gems_dir
   def loaded_from= path
     @loaded_from   = path && path.to_s
 
-    @extension_dir = nil
-    @extensions_dir = nil
-    @full_gem_path         = nil
-    @gem_dir               = nil
-    @gems_dir              = nil
-    @base_dir              = nil
+    @full_gem_path = nil
+    @gems_dir      = nil
+    @base_dir      = nil
   end
 
   ##
@@ -219,49 +118,11 @@ def platform
     raise NotImplementedError
   end
 
-  def raw_require_paths # :nodoc:
-    Array(@require_paths)
-  end
-
   ##
-  # Paths in the gem to add to <code>$LOAD_PATH</code> when this gem is
-  # activated.
-  #
-  # See also #require_paths=
-  #
-  # If you have an extension you do not need to add <code>"ext"</code> to the
-  # require path, the extension build process will copy the extension files
-  # into "lib" for you.
-  #
-  # The default value is <code>"lib"</code>
-  #
-  # Usage:
-  #
-  #   # If all library files are in the root directory...
-  #   spec.require_path = '.'
+  # Require paths of the gem
 
   def require_paths
-    return raw_require_paths if @extensions.nil? || @extensions.empty?
-
-    [extension_dir].concat raw_require_paths
-  end
-
-  ##
-  # Returns the paths to the source files for use with analysis and
-  # documentation tools.  These paths are relative to full_gem_path.
-
-  def source_paths
-    paths = raw_require_paths.dup
-
-    if @extensions then
-      ext_dirs = @extensions.map do |extension|
-        extension.split(File::SEPARATOR, 2).first
-      end.uniq
-
-      paths.concat ext_dirs
-    end
-
-    paths.uniq
+    raise NotImplementedError
   end
 
   ##
@@ -278,13 +139,5 @@ def version
     raise NotImplementedError
   end
 
-  ##
-  # Whether this specification is stubbed - i.e. we have information
-  # about the gem from a stub line, without having to evaluate the
-  # entire gemspec file.
-  def stubbed?
-    raise NotImplementedError
-  end
-
 end
 
diff --git a/lib/ruby/shared/rubygems/command.rb b/lib/ruby/shared/rubygems/command.rb
@@ -148,8 +148,6 @@ def execute
 
   ##
   # Display to the user that a gem couldn't be found and reasons why
-  #--
-  # TODO: replace +domain+ with a parameter to suppress suggestions
 
   def show_lookup_failure(gem_name, version, errors, domain)
     if errors and !errors.empty?
@@ -559,8 +557,7 @@ def wrap(text, width) # :doc:
   Further help:
     gem help commands            list all 'gem' commands
     gem help examples            show some examples of usage
-    gem help gem_dependencies    gem dependencies file guide
-    gem help platforms           gem platforms guide
+    gem help platforms           show information about platforms
     gem help <COMMAND>           show help on COMMAND
                                    (e.g. 'gem help install')
     gem server                   present a web page at

diff --git a/lib/ruby/shared/rubygems/command_manager.rb b/lib/ruby/shared/rubygems/command_manager.rb
@@ -48,7 +48,6 @@ class Gem::CommandManager
     :list,
     :lock,
     :mirror,
-    :open,
     :outdated,
     :owner,
     :pristine,
@@ -137,7 +136,7 @@ def command_names
   def run(args, build_args=nil)
     process_args(args, build_args)
   rescue StandardError, Timeout::Error => ex
-    alert_error "While executing gem ... (#{ex.class})\n    #{ex}"
+    alert_error "While executing gem ... (#{ex.class})\n    #{ex.to_s}"
     ui.backtrace ex
 
     terminate_interaction(1)

diff --git a/lib/ruby/shared/rubygems/commands/cert_command.rb b/lib/ruby/shared/rubygems/commands/cert_command.rb
@@ -129,21 +129,23 @@ def build_cert name, key # :nodoc:
   end
 
   def build_key # :nodoc:
-    return options[:key] if options[:key]
+    if options[:key] then
+      options[:key]
+    else
+      passphrase = ask_for_password 'Passphrase for your Private Key:'
+      say "\n"
 
-    passphrase = ask_for_password 'Passphrase for your Private Key:'
-    say "\n"
+      passphrase_confirmation = ask_for_password 'Please repeat the passphrase for your Private Key:'
+      say "\n"
 
-    passphrase_confirmation = ask_for_password 'Please repeat the passphrase for your Private Key:'
-    say "\n"
+      raise Gem::CommandLineError,
+            "Passphrase and passphrase confirmation don't match" unless passphrase == passphrase_confirmation
 
-    raise Gem::CommandLineError,
-          "Passphrase and passphrase confirmation don't match" unless passphrase == passphrase_confirmation
+      key      = Gem::Security.create_key
+      key_path = Gem::Security.write key, "gem-private_key.pem", 0600, passphrase
 
-    key      = Gem::Security.create_key
-    key_path = Gem::Security.write key, "gem-private_key.pem", 0600, passphrase
-
-    return key, key_path
+      return key, key_path
+    end
   end
 
   def certificates_matching filter

diff --git a/lib/ruby/shared/rubygems/commands/cleanup_command.rb b/lib/ruby/shared/rubygems/commands/cleanup_command.rb
@@ -67,10 +67,10 @@ def execute
 
     say "Clean Up Complete"
 
-    verbose do
+    if Gem.configuration.really_verbose then
       skipped = @default_gems.map { |spec| spec.full_name }
 
-      "Skipped default gems: #{skipped.join ', '}"
+      say "Skipped default gems: #{skipped.join ', '}"
     end
   end
 

diff --git a/lib/ruby/shared/rubygems/commands/contents_command.rb b/lib/ruby/shared/rubygems/commands/contents_command.rb
@@ -8,8 +8,7 @@ class Gem::Commands::ContentsCommand < Gem::Command
 
   def initialize
     super 'contents', 'Display the contents of the installed gems',
-          :specdirs => [], :lib_only => false, :prefix => true,
-          :show_install_dir => false
+          :specdirs => [], :lib_only => false, :prefix => true
 
     add_version_option
 
@@ -33,11 +32,6 @@ def initialize
       options[:prefix] = prefix
     end
 
-    add_option(      '--[no-]show-install-dir',
-               'Show only the gem install dir') do |show, options|
-      options[:show_install_dir] = show
-    end
-
     @path_kind = nil
     @spec_dirs = nil
     @version   = nil
@@ -71,12 +65,7 @@ def execute
     names = gem_names
 
     names.each do |name|
-      found =
-        if options[:show_install_dir] then
-          gem_install_dir name
-        else
-          gem_contents name
-        end
+      found = gem_contents name
 
       terminate_interaction 1 unless found or names.length > 1
     end
@@ -102,14 +91,14 @@ def files_in_gem spec
   end
 
   def files_in_default_gem spec
-    spec.files.map do |file|
+    spec.files.sort.map do |file|
       case file
       when /\A#{spec.bindir}\//
-        [RbConfig::CONFIG['bindir'], $POSTMATCH]
+        [Gem::ConfigMap[:bindir], $POSTMATCH]
       when /\.so\z/
-        [RbConfig::CONFIG['archdir'], file]
+        [Gem::ConfigMap[:archdir], file]
       else
-        [RbConfig::CONFIG['rubylibdir'], file]
+        [Gem::ConfigMap[:rubylibdir], file]
       end
     end
   end
@@ -126,16 +115,6 @@ def gem_contents name
     true
   end
 
-  def gem_install_dir name
-    spec = spec_for name
-
-    return false unless spec
-
-    say spec.gem_dir
-
-    true
-  end
-
   def gem_names # :nodoc:
     if options[:all] then
       Gem::Specification.map(&:name)
@@ -146,6 +125,7 @@ def gem_names # :nodoc:
 
   def path_description spec_dirs # :nodoc:
     if spec_dirs.empty? then
+      spec_dirs = Gem::Specification.dirs
       "default gem paths"
     else
       "specified path"

diff --git a/lib/ruby/shared/rubygems/commands/dependency_command.rb b/lib/ruby/shared/rubygems/commands/dependency_command.rb
@@ -31,7 +31,7 @@ def initialize
   end
 
   def arguments # :nodoc:
-    "REGEXP        show dependencies for gems whose names start with REGEXP"
+    "GEMNAME       name of gem to show dependencies for"
   end
 
   def defaults_str # :nodoc:
@@ -50,7 +50,7 @@ def description # :nodoc:
   end
 
   def usage # :nodoc:
-    "#{program_name} REGEXP"
+    "#{program_name} GEMNAME"
   end
 
   def fetch_remote_specs dependency # :nodoc:

diff --git a/lib/ruby/shared/rubygems/commands/environment_command.rb b/lib/ruby/shared/rubygems/commands/environment_command.rb
@@ -28,9 +28,8 @@ def description # :nodoc:
 gemrc files, environment variables and built-in defaults.
 
 Command line argument defaults and some RubyGems defaults can be set in a
-~/.gemrc file for individual users and a gemrc in the SYSTEM CONFIGURATION
-DIRECTORY for all users. These files are YAML files with the following YAML
-keys:
+~/.gemrc file for individual users and a /etc/gemrc for all users. These
+files are YAML files with the following YAML keys:
 
   :sources: A YAML array of remote gem repositories to install gems from
   :verbose: Verbosity of the gem command. false, true, and :really are the
@@ -121,8 +120,6 @@ def show_environment # :nodoc:
 
     out << "  - SPEC CACHE DIRECTORY: #{Gem.spec_cache_dir}\n"
 
-    out << "  - SYSTEM CONFIGURATION DIRECTORY: #{Gem::ConfigFile::SYSTEM_CONFIG_PATH}\n"
-
     out << "  - RUBYGEMS PLATFORMS:\n"
     Gem.platforms.each do |platform|
       out << "    - #{platform}\n"

diff --git a/lib/ruby/shared/rubygems/commands/generate_index_command.rb b/lib/ruby/shared/rubygems/commands/generate_index_command.rb
@@ -62,7 +62,7 @@ def description # :nodoc:
   end
 
   def execute
-    # This is always true because it's the only way now.
+    # This is always true becasue it's the only way now.
     options[:build_modern] = true
 
     if not File.exist?(options[:directory]) or

diff --git a/lib/ruby/shared/rubygems/commands/help_command.rb b/lib/ruby/shared/rubygems/commands/help_command.rb
@@ -52,183 +52,6 @@ class Gem::Commands::HelpCommand < Gem::Command
     gem update --system
   EOF
 
-  GEM_DEPENDENCIES = <<-EOF
-A gem dependencies file allows installation of a consistent set of gems across
-multiple environments.  The RubyGems implementation is designed to be
-compatible with Bundler's Gemfile format.  You can see additional
-documentation on the format at:
-
-  http://bundler.io
-
-RubyGems automatically looks for these gem dependencies files:
-
-* gem.deps.rb
-* Gemfile
-* Isolate
-
-These files are looked up automatically using `gem install -g`, or you can
-specify a custom file.
-
-When the RUBYGEMS_GEMDEPS environment variable is set to a gem dependencies
-file the gems from that file will be activated at startup time.  Set it to a
-specific filename or to "-" to have RubyGems automatically discover the gem
-dependencies file by walking up from the current directory.
-
-You can also activate gem dependencies at program startup using
-Gem.use_gemdeps.
-
-NOTE: Enabling automatic discovery on multiuser systems can lead to execution
-of arbitrary code when used from directories outside your control.
-
-Gem Dependencies
-================
-
-Use #gem to declare which gems you directly depend upon:
-
-  gem 'rake'
-
-To depend on a specific set of versions:
-
-  gem 'rake', '~> 10.3', '>= 10.3.2'
-
-RubyGems will require the gem name when activating the gem using
-the RUBYGEMS_GEMDEPS environment variable or Gem::use_gemdeps.  Use the
-require: option to override this behavior if the gem does not have a file of
-that name or you don't want to require those files:
-
-  gem 'my_gem', require: 'other_file'
-
-To prevent RubyGems from requiring any files use:
-
-  gem 'my_gem', require: false
-
-To load dependencies from a .gemspec file:
-
-  gemspec
-
-RubyGems looks for the first .gemspec file in the current directory.  To
-override this use the name: option:
-
-  gemspec name: 'specific_gem'
-
-To look in a different directory use the path: option:
-
-  gemspec name: 'specific_gem', path: 'gemspecs'
-
-To depend on a gem unpacked into a local directory:
-
-  gem 'modified_gem', path: 'vendor/modified_gem'
-
-To depend on a gem from git:
-
-  gem 'private_gem', git: 'git@my.company.example:private_gem.git'
-
-To depend on a gem from github:
-
-  gem 'private_gem', github: 'my_company/private_gem'
-
-To depend on a gem from a github gist:
-
-  gem 'bang', gist: '1232884'
-
-Git, github and gist support the ref:, branch: and tag: options to specify a
-commit reference or hash, branch or tag respectively to use for the gem.
-
-Setting the submodules: option to true for git, github and gist dependencies
-causes fetching of submodules when fetching the repository.
-
-You can depend on multiple gems from a single repository with the git method:
-
-  git 'https://github.com/rails/rails.git' do
-    gem 'activesupport'
-    gem 'activerecord'
-  end
-
-Gem Sources
-===========
-
-RubyGems uses the default sources for regular `gem install` for gem
-dependencies files.  Unlike bundler, you do need to specify a source.
-
-You can override the sources used for downloading gems with:
-
-  source 'https://gem_server.example'
-
-You may specify multiple sources.  Unlike bundler the prepend: option is not
-supported. Sources are used in-order, to prepend a source place it at the
-front of the list.
-
-Gem Platform
-============
-
-You can restrict gem dependencies to specific platforms with the #platform
-and #platforms methods:
-
-  platform :ruby_21 do
-    gem 'debugger'
-  end
-
-See the bundler Gemfile manual page for a list of platforms supported in a gem
-dependencies file.:
-
-  http://bundler.io/v1.6/man/gemfile.5.html
-
-Ruby Version and Engine Dependency
-==================================
-
-You can specifiy the version, engine and engine version of ruby to use with
-your gem dependencies file.  If you are not running the specified version
-RubyGems will raise an exception.
-
-To depend on a specific version of ruby:
-
-  ruby '2.1.2'
-
-To depend on a specific ruby engine:
-
-  ruby '1.9.3', engine: 'jruby'
-
-To depend on a specific ruby engine version:
-
-  ruby '1.9.3', engine: 'jruby', engine_version: '1.7.11'
-
-Grouping Dependencies
-=====================
-
-Gem dependencies may be placed in groups that can be excluded from install.
-Dependencies required for development or testing of your code may be excluded
-when installed in a production environment.
-
-A #gem dependency may be placed in a group using the group: option:
-
-  gem 'minitest', group: :test
-
-To install dependencies from a gemfile without specific groups use the
-`--without` option for `gem install -g`:
-
-  $ gem install -g --without test
-
-The group: option also accepts multiple groups if the gem fits in multiple
-categories.
-
-Multiple groups may be excluded during install by comma-separating the groups for `--without` or by specifying `--without` multiple times.
-
-The #group method can also be used to place gems in groups:
-
-  group :test do
-    gem 'minitest'
-    gem 'minitest-emoji'
-  end
-
-The #group method allows multiple groups.
-
-The #gemspec development dependencies are placed in the :development group by
-default.  This may be overriden with the :development_group option:
-
-  gemspec development_group: :other
-
-  EOF
-
   PLATFORMS = <<-'EOF'
 RubyGems platforms are composed of three parts, a CPU, an OS, and a
 version.  These values are taken from values in rbconfig.rb.  You can view
@@ -267,16 +90,6 @@ class Gem::Commands::HelpCommand < Gem::Command
 Gem::Platform::CURRENT.  This will correctly mark the gem with your ruby's
 platform.
   EOF
-
-  # NOTE when updating also update Gem::Command::HELP
-
-  SUBCOMMANDS = [
-    ["commands",         :show_commands],
-    ["options",          Gem::Command::HELP],
-    ["examples",         EXAMPLES],
-    ["gem_dependencies", GEM_DEPENDENCIES],
-    ["platforms",        PLATFORMS],
-  ]
   # :startdoc:
 
   def initialize
@@ -285,27 +98,35 @@ def initialize
     @command_manager = Gem::CommandManager.instance
   end
 
+  def arguments # :nodoc:
+    args = <<-EOF
+      commands      List all 'gem' commands
+      examples      Show examples of 'gem' usage
+      <command>     Show specific help for <command>
+    EOF
+    return args.gsub(/^\s+/, '')
+  end
+
   def usage # :nodoc:
     "#{program_name} ARGUMENT"
   end
 
   def execute
     arg = options[:args][0]
 
-    _, help = SUBCOMMANDS.find do |command,|
-      begins? command, arg
-    end
+    if begins? "commands", arg then
+      show_commands
 
-    if help then
-      if Symbol === help then
-        send help
-      else
-        say help
-      end
-      return
-    end
+    elsif begins? "options", arg then
+      say Gem::Command::HELP
+
+    elsif begins? "examples", arg then
+      say EXAMPLES
+
+    elsif begins? "platforms", arg then
+      say PLATFORMS
 
-    if options[:help] then
+    elsif options[:help] then
       show_help
 
     elsif arg then

diff --git a/lib/ruby/shared/rubygems/commands/install_command.rb b/lib/ruby/shared/rubygems/commands/install_command.rb
@@ -21,10 +21,7 @@ class Gem::Commands::InstallCommand < Gem::Command
   def initialize
     defaults = Gem::DependencyInstaller::DEFAULT_OPTIONS.merge({
       :format_executable => false,
-      :lock              => true,
-      :suggest_alternate => true,
       :version           => Gem::Requirement.default,
-      :without_groups    => [],
     })
 
     super 'install', 'Install a gem into the local repository', defaults
@@ -35,53 +32,19 @@ def initialize
     add_version_option
     add_prerelease_option "to be installed. (Only for listed gems)"
 
-    add_option(:"Install/Update", '-g', '--file [FILE]',
+    add_option(:"Install/Update", '-g', '--file FILE',
                'Read from a gem dependencies API file and',
                'install the listed gems') do |v,o|
-      v = Gem::GEM_DEP_FILES.find do |file|
-        File.exist? file
-      end unless v
-
-      unless v then
-        message = v ? v : "(tried #{Gem::GEM_DEP_FILES.join ', '})"
-
-        raise OptionParser::InvalidArgument,
-                "cannot find gem dependencies file #{message}"
-      end
-
       o[:gemdeps] = v
     end
 
-    add_option(:"Install/Update", '--without GROUPS', Array,
-               'Omit the named groups (comma separated)',
-               'when installing from a gem dependencies',
-               'file') do |v,o|
-      o[:without_groups].concat v.map { |without| without.intern }
-    end
-
     add_option(:"Install/Update", '--default',
                'Add the gem\'s full specification to',
                'specifications/default and extract only its bin') do |v,o|
       o[:install_as_default] = v
     end
 
-    add_option(:"Install/Update", '--explain',
-               'Rather than install the gems, indicate which would',
-               'be installed') do |v,o|
-      o[:explain] = v
-    end
-
-    add_option(:"Install/Update", '--[no-]lock',
-               'Create a lock file (when used with -g/--file)') do |v,o|
-      o[:lock] = v
-    end
-
-    add_option(:"Install/Update", '--[no-]suggestions',
-               'Suggest alternates when gems are not found') do |v,o|
-      o[:suggest_alternate] = v
-    end
-
-    @installed_specs = []
+    @installed_specs = nil
   end
 
   def arguments # :nodoc:
@@ -90,7 +53,7 @@ def arguments # :nodoc:
 
   def defaults_str # :nodoc:
     "--both --version '#{Gem::Requirement.default}' --document --no-force\n" +
-    "--install-dir #{Gem.dir} --lock"
+    "--install-dir #{Gem.dir}"
   end
 
   def description # :nodoc:
@@ -104,25 +67,6 @@ def description # :nodoc:
 For example `rake _0.7.3_ --version` will run rake version 0.7.3 if a newer
 version is also installed.
 
-Gem Dependency Files
-====================
-
-RubyGems can install a consistent set of gems across multiple environments
-using `gem install -g` when a gem dependencies file (gem.deps.rb, Gemfile or
-Isolate) is present.  If no explicit file is given RubyGems attempts to find
-one in the current directory.
-
-When the RUBYGEMS_GEMDEPS environment variable is set to a gem dependencies
-file the gems from that file will be activated at startup time.  Set it to a
-specific filename or to "-" to have RubyGems automatically discover the gem
-dependencies file by walking up from the current directory.
-
-NOTE: Enabling automatic discovery on multiuser systems can lead to
-execution of arbitrary code when used from directories outside your control.
-
-Extension Install Failures
-==========================
-
 If an extension fails to compile during gem installation the gem
 specification is not written out, but the gem remains unpacked in the
 repository.  You may need to specify the path to the library's headers and
@@ -185,9 +129,9 @@ def check_version # :nodoc:
   end
 
   def execute
-    if options.include? :gemdeps then
-      install_from_gemdeps
-      return # not reached
+    if gf = options[:gemdeps] then
+      install_from_gemdeps gf
+      return
     end
 
     @installed_specs = []
@@ -203,14 +147,17 @@ def execute
 
     show_installed
 
-    terminate_interaction exit_code
+    raise Gem::SystemExitException, exit_code
   end
 
-  def install_from_gemdeps # :nodoc:
+  def install_from_gemdeps gf # :nodoc:
     require 'rubygems/request_set'
     rs = Gem::RequestSet.new
+    rs.load_gemdeps gf
 
-    specs = rs.install_from_gemdeps options do |req, inst|
+    rs.resolve
+
+    specs = rs.install options do |req, inst|
       s = req.full_spec
 
       if inst
@@ -222,71 +169,19 @@ def install_from_gemdeps # :nodoc:
 
     @installed_specs = specs
 
-    terminate_interaction
+    raise Gem::SystemExitException, 0
   end
 
   def install_gem name, version # :nodoc:
     return if options[:conservative] and
       not Gem::Dependency.new(name, version).matching_specs.empty?
 
-    req = Gem::Requirement.create(version)
-
-    if options[:ignore_dependencies] then
-      install_gem_without_dependencies name, req
-    else
-      inst = Gem::DependencyInstaller.new options
-      request_set = inst.resolve_dependencies name, req
-
-      if options[:explain]
-        puts "Gems to install:"
-
-        request_set.sorted_requests.each do |s|
-          puts "  #{s.full_name}"
-        end
-
-        return
-      else
-        @installed_specs.concat request_set.install options
-      end
-
-      show_install_errors inst.errors
-    end
-  end
-
-  def install_gem_without_dependencies name, req # :nodoc:
-    gem = nil
-
-    if local? then
-      if name =~ /\.gem$/ and File.file? name then
-        source = Gem::Source::SpecificFile.new name
-        spec = source.spec
-      else
-        source = Gem::Source::Local.new
-        spec = source.find_gem name, req
-      end
-      gem = source.download spec if spec
-    end
-
-    if remote? and not gem then
-      dependency = Gem::Dependency.new name, req
-      dependency.prerelease = options[:prerelease]
-
-      fetcher = Gem::RemoteFetcher.fetcher
-      gem = fetcher.download_to_cache dependency
-    end
-
-    inst = Gem::Installer.new gem, options
-    inst.install
-
-    require 'rubygems/dependency_installer'
-    dinst = Gem::DependencyInstaller.new options
-    dinst.installed_gems.replace [inst.spec]
+    inst = Gem::DependencyInstaller.new options
+    inst.install name, Gem::Requirement.create(version)
 
-    Gem.done_installing_hooks.each do |hook|
-      hook.call dinst, [inst.spec]
-    end unless Gem.done_installing_hooks.empty?
+    @installed_specs.push(*inst.installed_gems)
 
-    @installed_specs.push(inst.spec)
+    show_install_errors inst.errors
   end
 
   def install_gems # :nodoc:
@@ -300,10 +195,8 @@ def install_gems # :nodoc:
       rescue Gem::InstallError => e
         alert_error "Error installing #{gem_name}:\n\t#{e.message}"
         exit_code |= 1
-      rescue Gem::GemNotFoundException, Gem::UnsatisfiableDependencyError => e
-        domain = options[:domain]
-        domain = :local unless options[:suggest_alternate]
-        show_lookup_failure e.name, e.version, e.errors, domain
+      rescue Gem::GemNotFoundException => e
+        show_lookup_failure e.name, e.version, e.errors, options[:domain]
 
         exit_code |= 2
       end

diff --git a/lib/ruby/shared/rubygems/commands/list_command.rb b/lib/ruby/shared/rubygems/commands/list_command.rb
@@ -8,13 +8,13 @@
 class Gem::Commands::ListCommand < Gem::Commands::QueryCommand
 
   def initialize
-    super 'list', 'Display local gems whose name matches REGEXP'
+    super 'list', 'Display local gems whose name starts with STRING'
 
     remove_option('--name-matches')
   end
 
   def arguments # :nodoc:
-    "REGEXP        regexp to look for in gem name"
+    "STRING        start of gem name to look for"
   end
 
   def defaults_str # :nodoc:
@@ -33,7 +33,13 @@ def description # :nodoc:
   end
 
   def usage # :nodoc:
-    "#{program_name} [STRING ...]"
+    "#{program_name} [STRING]"
+  end
+
+  def execute
+    string = get_one_optional_argument || ''
+    options[:name] = /^#{string}/i
+    super
   end
 
 end

diff --git a/lib/ruby/shared/rubygems/commands/mirror_command.rb b/lib/ruby/shared/rubygems/commands/mirror_command.rb
@@ -1,25 +1,23 @@
 require 'rubygems/command'
 
-unless defined? Gem::Commands::MirrorCommand
-  class Gem::Commands::MirrorCommand < Gem::Command
-    def initialize
-      super('mirror', 'Mirror all gem files (requires rubygems-mirror)')
-      begin
-        Gem::Specification.find_by_name('rubygems-mirror').activate
-      rescue Gem::LoadError
-        # no-op
-      end
+class Gem::Commands::MirrorCommand < Gem::Command
+  def initialize
+    super('mirror', 'Mirror all gem files (requires rubygems-mirror)')
+    begin
+      Gem::Specification.find_by_name('rubygems-mirror').activate
+    rescue Gem::LoadError
+      # no-op
     end
+  end
 
-    def description # :nodoc:
-      <<-EOF
+  def description # :nodoc:
+    <<-EOF
 The mirror command has been moved to the rubygems-mirror gem.
-      EOF
-    end
-
-    def execute
-      alert_error "Install the rubygems-mirror gem for the mirror command"
-    end
+    EOF
+  end
 
+  def execute
+    alert_error "Install the rubygems-mirror gem for the mirror command"
   end
+
 end
diff --git a/lib/ruby/shared/rubygems/commands/open_command.rb b/lib/ruby/shared/rubygems/commands/open_command.rb
diff --git a/lib/ruby/shared/rubygems/commands/outdated_command.rb b/lib/ruby/shared/rubygems/commands/outdated_command.rb
@@ -17,7 +17,7 @@ def initialize
 
   def description # :nodoc:
     <<-EOF
-The outdated command lists gems you may wish to upgrade to a newer version.
+The outdated command lists gems you way wish to upgrade to a newer version.
 
 You can check for dependency mismatches using the dependency command and
 update the gems with the update or install commands.

diff --git a/lib/ruby/shared/rubygems/commands/owner_command.rb b/lib/ruby/shared/rubygems/commands/owner_command.rb
@@ -86,9 +86,7 @@ def manage_owners method, name, owners
           request.add_field "Authorization", api_key
         end
 
-        action = method == :delete ? "Removing" : "Adding"
-
-        with_response response, "#{action} #{owner}"
+        with_response response, "Removing #{owner}"
       rescue
         # ignore
       end

diff --git a/lib/ruby/shared/rubygems/commands/pristine_command.rb b/lib/ruby/shared/rubygems/commands/pristine_command.rb
@@ -12,7 +12,6 @@ def initialize
           'Restores installed gems to pristine condition from files located in the gem cache',
           :version => Gem::Requirement.default,
           :extensions => true,
-          :extensions_set => false,
           :all => false
 
     add_option('--all',
@@ -24,8 +23,7 @@ def initialize
     add_option('--[no-]extensions',
                'Restore gems with extensions',
                'in addition to regular gems') do |value, options|
-      options[:extensions_set] = true
-      options[:extensions]     = value
+      options[:extensions] = value
     end
 
     add_option('--only-executables',
@@ -64,9 +62,6 @@ def description # :nodoc:
 
 If --no-extensions is provided pristine will not attempt to restore a gem
 with an extension.
-
-If --extensions is given (but not --all or gem names) only gems with
-extensions will be restored.
     EOF
   end
 
@@ -77,14 +72,6 @@ def usage # :nodoc:
   def execute
     specs = if options[:all] then
               Gem::Specification.map
-
-            # `--extensions` must be explicitly given to pristine only gems
-            # with extensions.
-            elsif options[:extensions_set] and
-                  options[:extensions] and options[:args].empty? then
-              Gem::Specification.select do |spec|
-                spec.extensions and not spec.extensions.empty?
-              end
             else
               get_all_gem_names.map do |gem_name|
                 Gem::Specification.find_all_by_name gem_name, options[:version]
@@ -109,11 +96,6 @@ def execute
         next
       end
 
-      if spec.bundled_gem_in_old_ruby?
-        say "Skipped #{spec.full_name}, it is bundled with old Ruby"
-        next
-      end
-
       unless spec.extensions.empty? or options[:extensions] then
         say "Skipped #{spec.full_name}, it needs to compile an extension"
         next
@@ -125,17 +107,8 @@ def execute
         require 'rubygems/remote_fetcher'
 
         say "Cached gem for #{spec.full_name} not found, attempting to fetch..."
-
         dep = Gem::Dependency.new spec.name, spec.version
-        found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dep
-
-        if found.empty?
-          say "Skipped #{spec.full_name}, it was not found from cache and remote sources"
-          next
-        end
-
-        spec_candidate, source = found.first
-        Gem::RemoteFetcher.fetcher.download spec_candidate, source.uri.to_s, spec.base_dir
+        Gem::RemoteFetcher.fetcher.download_to_cache dep
       end
 
       env_shebang =

diff --git a/lib/ruby/shared/rubygems/commands/push_command.rb b/lib/ruby/shared/rubygems/commands/push_command.rb
@@ -69,18 +69,13 @@ def send_gem name
       terminate_interaction 1
     end
 
-    gem_data = Gem::Package.new(name)
-
     unless @host then
-      @host = gem_data.spec.metadata['default_gem_server']
+      if gem_data = Gem::Package.new(name) then
+        @host = gem_data.spec.metadata['default_gem_server']
+      end
     end
 
-    # Always include this, even if it's nil
-    args << @host
-
-    if gem_data.spec.metadata.has_key?('allowed_push_host')
-      args << gem_data.spec.metadata['allowed_push_host']
-    end
+    args << @host if @host
 
     say "Pushing gem to #{@host || Gem.host}..."
 

diff --git a/lib/ruby/shared/rubygems/commands/query_command.rb b/lib/ruby/shared/rubygems/commands/query_command.rb
@@ -72,26 +72,16 @@ def description # :nodoc:
 
   def execute
     exit_code = 0
-    if options[:args].to_a.empty? and options[:name].source.empty?
-      name = options[:name]
-      no_name = true
-    elsif !options[:name].source.empty?
-      name = Array(options[:name])
-    else
-      name = options[:args].to_a.map{|arg| /#{arg}/i }
-    end
 
+    name = options[:name]
     prerelease = options[:prerelease]
 
     unless options[:installed].nil? then
-      if no_name then
+      if name.source.empty? then
         alert_error "You must specify a gem name"
         exit_code |= 4
-      elsif name.count > 1
-        alert_error "You must specify only ONE gem!"
-        exit_code |= 4
       else
-        installed = installed? name.first, options[:version]
+        installed = installed? name, options[:version]
         installed = !installed unless options[:installed]
 
         if installed then
@@ -105,22 +95,6 @@ def execute
       terminate_interaction exit_code
     end
 
-    names = Array(name)
-    names.each { |n| show_gems n, prerelease }
-  end
-
-  private
-
-  def display_header type
-    if (ui.outs.tty? and Gem.configuration.verbose) or both? then
-      say
-      say "*** #{type} GEMS ***"
-      say
-    end
-  end
-
-  #Guts of original execute
-  def show_gems name, prerelease
     req = Gem::Requirement.default
     # TODO: deprecate for real
     dep = Gem::Deprecate.skip_during { Gem::Dependency.new name, req }
@@ -131,7 +105,11 @@ def show_gems name, prerelease
         alert_warning "prereleases are always shown locally"
       end
 
-      display_header 'LOCAL'
+      if ui.outs.tty? or both? then
+        say
+        say "*** LOCAL GEMS ***"
+        say
+      end
 
       specs = Gem::Specification.find_all { |s|
         s.name =~ name and req =~ s.version
@@ -145,7 +123,11 @@ def show_gems name, prerelease
     end
 
     if remote? then
-      display_header 'REMOTE'
+      if ui.outs.tty? or both? then
+        say
+        say "*** REMOTE GEMS ***"
+        say
+      end
 
       fetcher = Gem::SpecFetcher.fetcher
 
@@ -161,18 +143,20 @@ def show_gems name, prerelease
                :latest
              end
 
-      if name.source.empty?
+      if options[:name].source.empty?
         spec_tuples = fetcher.detect(type) { true }
       else
         spec_tuples = fetcher.detect(type) do |name_tuple|
-          name === name_tuple.name
+          options[:name] === name_tuple.name
         end
       end
 
       output_query_results spec_tuples
     end
   end
 
+  private
+
   ##
   # Check if gem +name+ version +version+ is installed.
 

diff --git a/lib/ruby/shared/rubygems/commands/search_command.rb b/lib/ruby/shared/rubygems/commands/search_command.rb
@@ -4,15 +4,15 @@
 class Gem::Commands::SearchCommand < Gem::Commands::QueryCommand
 
   def initialize
-    super 'search', 'Display remote gems whose name matches REGEXP'
+    super 'search', 'Display remote gems whose name contains STRING'
 
     remove_option '--name-matches'
 
     defaults[:domain] = :remote
   end
 
   def arguments # :nodoc:
-    "REGEXP        regexp to search for in gem name"
+    "STRING        fragment of gem name to search for"
   end
 
   def defaults_str # :nodoc:
@@ -21,8 +21,8 @@ def defaults_str # :nodoc:
 
   def description # :nodoc:
     <<-EOF
-The search command displays remote gems whose name matches the given
-regexp.
+The search command displays remote gems whose name contains the given
+string.
 
 The --details option displays additional details from the gem but will
 take a little longer to complete as it must download the information
@@ -33,7 +33,13 @@ def description # :nodoc:
   end
 
   def usage # :nodoc:
-    "#{program_name} [REGEXP]"
+    "#{program_name} [STRING]"
+  end
+
+  def execute
+    string = get_one_optional_argument
+    options[:name] = /#{string}/i
+    super
   end
 
 end

diff --git a/lib/ruby/shared/rubygems/commands/setup_command.rb b/lib/ruby/shared/rubygems/commands/setup_command.rb
@@ -13,7 +13,7 @@ def initialize
 
     super 'setup', 'Install RubyGems',
           :format_executable => true, :document => %w[ri],
-          :site_or_vendor => 'sitelibdir',
+          :site_or_vendor => :sitelibdir,
           :destdir => '', :prefix => '', :previous_version => ''
 
     add_option '--previous-version=VERSION',
@@ -36,7 +36,7 @@ def initialize
 
     add_option '--[no-]vendor',
                'Install into vendorlibdir not sitelibdir' do |vendor, options|
-      options[:site_or_vendor] = vendor ? 'vendorlibdir' : 'sitelibdir'
+      options[:site_or_vendor] = vendor ? :vendorlibdir : :sitelibdir
     end
 
     add_option '--[no-]format-executable',
@@ -343,19 +343,19 @@ def generate_default_dirs(install_destdir)
     site_or_vendor = options[:site_or_vendor]
 
     if prefix.empty? then
-      lib_dir = RbConfig::CONFIG[site_or_vendor]
-      bin_dir = RbConfig::CONFIG['bindir']
+      lib_dir = Gem::ConfigMap[site_or_vendor]
+      bin_dir = Gem::ConfigMap[:bindir]
     else
       # Apple installed RubyGems into libdir, and RubyGems <= 1.1.0 gets
       # confused about installation location, so switch back to
       # sitelibdir/vendorlibdir.
       if defined?(APPLE_GEM_HOME) and
         # just in case Apple and RubyGems don't get this patched up proper.
-        (prefix == RbConfig::CONFIG['libdir'] or
+        (prefix == Gem::ConfigMap[:libdir] or
          # this one is important
-         prefix == File.join(RbConfig::CONFIG['libdir'], 'ruby')) then
-         lib_dir = RbConfig::CONFIG[site_or_vendor]
-         bin_dir = RbConfig::CONFIG['bindir']
+         prefix == File.join(Gem::ConfigMap[:libdir], 'ruby')) then
+         lib_dir = Gem::ConfigMap[site_or_vendor]
+         bin_dir = Gem::ConfigMap[:bindir]
       else
         lib_dir = File.join prefix, 'lib'
         bin_dir = File.join prefix, 'bin'
@@ -446,7 +446,7 @@ def show_release_notes
         history.force_encoding Encoding::UTF_8 if
           Object.const_defined? :Encoding
 
-        history = history.sub(/^# coding:.*?(?=^=)/m, '')
+        history = history.sub(/^# coding:.*?^=/m, '')
 
         text = history.split(HISTORY_HEADER)
         text.shift # correct an off-by-one generated by split

diff --git a/lib/ruby/shared/rubygems/commands/specification_command.rb b/lib/ruby/shared/rubygems/commands/specification_command.rb
@@ -127,7 +127,7 @@ def execute
     end
 
     unless options[:all] then
-      specs = [specs.max_by { |s| s.version }]
+      specs = [specs.sort_by { |s| s.version }.last]
     end
 
     specs.each do |s|

diff --git a/lib/ruby/shared/rubygems/commands/uninstall_command.rb b/lib/ruby/shared/rubygems/commands/uninstall_command.rb
@@ -15,7 +15,7 @@ class Gem::Commands::UninstallCommand < Gem::Command
   def initialize
     super 'uninstall', 'Uninstall gems from the local repository',
           :version => Gem::Requirement.default, :user_install => true,
-          :check_dev => false, :vendor => false
+          :check_dev => false
 
     add_option('-a', '--[no-]all',
       'Uninstall all matching versions'
@@ -76,18 +76,6 @@ def initialize
 
     add_version_option
     add_platform_option
-
-    add_option('--vendor',
-               'Uninstall gem from the vendor directory.',
-               'Only for use by gem repackagers.') do |value, options|
-      unless Gem.vendor_dir then
-        raise OptionParser::InvalidOption.new 'your platform is not supported'
-      end
-
-      alert_warning 'Use your OS package manager to uninstall vendor gems'
-      options[:vendor] = true
-      options[:install_dir] = Gem.vendor_dir
-    end
   end
 
   def arguments # :nodoc:
@@ -124,7 +112,7 @@ def execute
   end
 
   def uninstall_all
-    specs = Gem::Specification.reject { |spec| spec.default_gem? }
+    _, specs = Gem::Specification.partition { |spec| spec.default_gem? }
 
     specs.each do |spec|
       options[:version] = spec.version

diff --git a/lib/ruby/shared/rubygems/commands/unpack_command.rb b/lib/ruby/shared/rubygems/commands/unpack_command.rb
@@ -134,7 +134,7 @@ def get_path dependency
 
     specs = dependency.matching_specs
 
-    selected = specs.max_by { |s| s.version }
+    selected = specs.sort_by { |s| s.version }.last # HACK: hunt last down
 
     return Gem::RemoteFetcher.fetcher.download_to_cache(dependency) unless
       selected

diff --git a/lib/ruby/shared/rubygems/commands/update_command.rb b/lib/ruby/shared/rubygems/commands/update_command.rb
@@ -16,8 +16,6 @@ class Gem::Commands::UpdateCommand < Gem::Command
 
   attr_reader :installer # :nodoc:
 
-  attr_reader :updated # :nodoc:
-
   def initialize
     super 'update', 'Update installed gems to the latest version',
       :document => %w[rdoc ri],
@@ -47,7 +45,7 @@ def initialize
   end
 
   def arguments # :nodoc:
-    "REGEXP        regexp to search for in gem name"
+    "GEMNAME       name of gem to update"
   end
 
   def defaults_str # :nodoc:
@@ -58,13 +56,13 @@ def description # :nodoc:
     <<-EOF
 The update command will update your gems to the latest version.
 
-The update command does not remove the previous version. Use the cleanup
+The update comamnd does not remove the previous version.  Use the cleanup
 command to remove old versions.
     EOF
   end
 
   def usage # :nodoc:
-    "#{program_name} REGEXP [REGEXP ...]"
+    "#{program_name} GEMNAME [GEMNAME ...]"
   end
 
   def check_latest_rubygems version # :nodoc:
@@ -84,6 +82,8 @@ def check_update_arguments # :nodoc:
   end
 
   def execute
+    hig = {}
+
     if options[:system] then
       update_rubygems
       return
@@ -97,14 +97,10 @@ def execute
 
     updated = update_gems gems_to_update
 
-    updated_names = updated.map { |spec| spec.name }
-    not_updated_names = options[:args].uniq - updated_names
-
     if updated.empty? then
       say "Nothing to update"
     else
-      say "Gems updated: #{updated_names.join(' ')}"
-      say "Gems already up-to-date: #{not_updated_names.join(' ')}" unless not_updated_names.empty?
+      say "Gems updated: #{updated.map { |spec| spec.name }.join ' '}"
     end
   end
 
@@ -114,11 +110,7 @@ def fetch_remote_gems spec # :nodoc:
 
     fetcher = Gem::SpecFetcher.fetcher
 
-    spec_tuples, errors = fetcher.search_for_dependency dependency
-
-    error = errors.find { |e| e.respond_to? :exception }
-
-    raise error if error
+    spec_tuples, _ = fetcher.search_for_dependency dependency
 
     spec_tuples
   end
@@ -142,7 +134,7 @@ def highest_remote_version spec # :nodoc:
       g.name == spec.name and g.match_platform?
     end
 
-    highest_remote_gem = matching_gems.max_by { |g,_| g.version }
+    highest_remote_gem = matching_gems.sort_by { |g,_| g.version }.last
 
     highest_remote_gem ||= [Gem::NameTuple.null]
 
@@ -201,16 +193,17 @@ def rubygems_target_version
   def update_gem name, version = Gem::Requirement.default
     return if @updated.any? { |spec| spec.name == name }
 
-    update_options = options.dup
-    update_options[:prerelease] = version.prerelease?
+    @installer ||= Gem::DependencyInstaller.new options
 
-    @installer = Gem::DependencyInstaller.new update_options
+    success = false
 
     say "Updating #{name}"
     begin
       @installer.install name, Gem::Requirement.new(version)
-    rescue Gem::InstallError, Gem::DependencyError => e
+      success = true
+    rescue Gem::InstallError => e
       alert_error "Error installing #{name}:\n\t#{e.message}"
+      success = false
     end
 
     @installer.installed_gems.each do |spec|
@@ -251,9 +244,6 @@ def update_rubygems_arguments # :nodoc:
     args << '--no-rdoc' unless options[:document].include? 'rdoc'
     args << '--no-ri'   unless options[:document].include? 'ri'
     args << '--no-format-executable' if options[:no_format_executable]
-    args << '--previous-version' << Gem::VERSION if
-      options[:system] == true or
-        Gem::Version.new(options[:system]) >= Gem::Version.new(2)
     args
   end
 
@@ -262,7 +252,7 @@ def which_to_update highest_installed_gems, gem_names, system = false
 
     highest_installed_gems.each do |l_name, l_spec|
       next if not gem_names.empty? and
-              gem_names.none? { |name| name == l_spec.name }
+              gem_names.all? { |name| /#{name}/ !~ l_spec.name }
 
       highest_remote_ver = highest_remote_version l_spec
 
@@ -275,3 +265,4 @@ def which_to_update highest_installed_gems, gem_names, system = false
   end
 
 end
+
diff --git a/lib/ruby/shared/rubygems/commands/which_command.rb b/lib/ruby/shared/rubygems/commands/which_command.rb
@@ -35,7 +35,7 @@ def description # :nodoc:
   end
 
   def execute
-    found = true
+    found = false
 
     options[:args].each do |arg|
       arg = arg.sub(/#{Regexp.union(*Gem.suffixes)}$/, '')
@@ -45,9 +45,9 @@ def execute
 
       if spec then
         if options[:search_gems_first] then
-          dirs = spec.full_require_paths + $LOAD_PATH
+          dirs = gem_paths(spec) + $LOAD_PATH
         else
-          dirs = $LOAD_PATH + spec.full_require_paths
+          dirs = $LOAD_PATH + gem_paths(spec)
         end
       end
 
@@ -56,10 +56,9 @@ def execute
 
       if paths.empty? then
         alert_error "Can't find ruby library file or shared library #{arg}"
-
-        found &&= false
       else
         say paths
+        found = true
       end
     end
 
@@ -82,6 +81,10 @@ def find_paths(package_name, dirs)
     result
   end
 
+  def gem_paths(spec)
+    spec.require_paths.collect { |d| File.join spec.full_gem_path, d }
+  end
+
   def usage # :nodoc:
     "#{program_name} FILE [FILE ...]"
   end

diff --git a/lib/ruby/shared/rubygems/commands/yank_command.rb b/lib/ruby/shared/rubygems/commands/yank_command.rb
@@ -44,40 +44,45 @@ def initialize
       options[:undo] = true
     end
 
-    add_key_option
+    add_option('-k', '--key KEY_NAME',
+               'Use API key from your gem credentials file') do |value, options|
+      options[:key] = value
+    end
   end
 
   def execute
     sign_in
 
     version   = get_version_from_requirements(options[:version])
     platform  = get_platform_from_requirements(options)
+    api_key   = Gem.configuration.rubygems_api_key
+    api_key   = Gem.configuration.api_keys[options[:key].to_sym] if options[:key]
 
     if version then
       if options[:undo] then
-        unyank_gem(version, platform)
+        unyank_gem(version, platform, api_key)
       else
-        yank_gem(version, platform)
+        yank_gem(version, platform, api_key)
       end
     else
       say "A version argument is required: #{usage}"
       terminate_interaction
     end
   end
 
-  def yank_gem(version, platform)
+  def yank_gem(version, platform, api_key)
     say "Yanking gem from #{self.host}..."
-    yank_api_request(:delete, version, platform, "api/v1/gems/yank")
+    yank_api_request(:delete, version, platform, "api/v1/gems/yank", api_key)
   end
 
-  def unyank_gem(version, platform)
+  def unyank_gem(version, platform, api_key)
     say "Unyanking gem from #{host}..."
-    yank_api_request(:put, version, platform, "api/v1/gems/unyank")
+    yank_api_request(:put, version, platform, "api/v1/gems/unyank", api_key)
   end
 
   private
 
-  def yank_api_request(method, version, platform, api)
+  def yank_api_request(method, version, platform, api, api_key)
     name = get_one_gem_name
     response = rubygems_api_request(method, api) do |request|
       request.add_field("Authorization", api_key)

diff --git a/lib/ruby/shared/rubygems/compatibility.rb b/lib/ruby/shared/rubygems/compatibility.rb
@@ -33,12 +33,7 @@ class << Gem
 module Gem
   RubyGemsVersion = VERSION
 
-  # TODO remove at RubyGems 3
-
   RbConfigPriorities = %w[
-    MAJOR
-    MINOR
-    TEENY
     EXEEXT RUBY_SO_NAME arch bindir datadir libdir ruby_install_name
     ruby_version rubylibprefix sitedir sitelibdir vendordir vendorlibdir
     rubylibdir
@@ -47,7 +42,7 @@ module Gem
   unless defined?(ConfigMap)
     ##
     # Configuration settings from ::RbConfig
-    ConfigMap = Hash.new do |cm, key| # TODO remove at RubyGems 3
+    ConfigMap = Hash.new do |cm, key|
       cm[key] = RbConfig::CONFIG[key.to_s]
     end
   else

diff --git a/lib/ruby/shared/rubygems/config_file.rb b/lib/ruby/shared/rubygems/config_file.rb
@@ -57,7 +57,7 @@ class Gem::ConfigFile
 
   # :stopdoc:
 
-  SYSTEM_CONFIG_PATH =
+  system_config_path =
     begin
       require "etc"
       Etc.sysconfdir
@@ -86,7 +86,7 @@ class Gem::ConfigFile
 
   # :startdoc:
 
-  SYSTEM_WIDE_CONFIG_FILE = File.join SYSTEM_CONFIG_PATH, 'gemrc'
+  SYSTEM_WIDE_CONFIG_FILE = File.join system_config_path, 'gemrc'
 
   ##
   # List of arguments supplied to the config file object.
@@ -137,10 +137,9 @@ class Gem::ConfigFile
   attr_reader :ssl_verify_mode
 
   ##
-  # Path name of directory or file of openssl CA certificate, used for remote
-  # https connection
+  # Path name of directory or file of openssl CA certificate, used for remote https connection
 
-  attr_accessor :ssl_ca_cert
+  attr_reader :ssl_ca_cert
 
   ##
   # Path name of directory or file of openssl client certificate, used for remote https connection with client authentication
@@ -337,7 +336,7 @@ def load_file(filename)
       end
       return content
     rescue *YAMLErrors => e
-      warn "Failed to load #{filename}, #{e}"
+      warn "Failed to load #{filename}, #{e.to_s}"
     rescue Errno::EACCES
       warn "Failed to load #{filename} due to permissions problem."
     end
@@ -383,8 +382,6 @@ def handle_arguments(arg_list)
         @backtrace = true
       when /^--debug$/ then
         $DEBUG = true
-
-        warn 'NOTE:  Debugging mode prints all exceptions even when rescued'
       else
         @args << arg
       end
@@ -430,15 +427,6 @@ def to_yaml # :nodoc:
                             DEFAULT_VERBOSITY
                           end
 
-    yaml_hash[:ssl_verify_mode] =
-      @hash[:ssl_verify_mode] if @hash.key? :ssl_verify_mode
-
-    yaml_hash[:ssl_ca_cert] =
-      @hash[:ssl_ca_cert] if @hash.key? :ssl_ca_cert
-
-    yaml_hash[:ssl_client_cert] =
-      @hash[:ssl_client_cert] if @hash.key? :ssl_client_cert
-
     keys = yaml_hash.keys.map { |key| key.to_s }
     keys << 'debug'
     re = Regexp.union(*keys)

diff --git a/lib/ruby/shared/rubygems/core_ext/kernel_gem.rb b/lib/ruby/shared/rubygems/core_ext/kernel_gem.rb
@@ -1,9 +1,3 @@
-##
-# RubyGems adds the #gem method to allow activation of specific gem versions
-# and overrides the #require method on Kernel to make gems appear as if they
-# live on the <code>$LOAD_PATH</code>.  See the documentation of these methods
-# for further detail.
-
 module Kernel
 
   # REFACTOR: This should be pulled out into some kind of hacks file.
@@ -26,11 +20,6 @@ module Kernel
   # Kernel#gem should be called *before* any require statements (otherwise
   # RubyGems may load a conflicting library version).
   #
-  # Kernel#gem only loads prerelease versions when prerelease +requirements+
-  # are given:
-  #
-  #   gem 'rake', '>= 1.1.a', '< 2'
-  #
   # In older RubyGems versions, the environment variable GEM_SKIP could be
   # used to skip activation of specified gems, for example to test out changes
   # that haven't been installed yet.  Now RubyGems defers to -I and the
@@ -55,17 +44,8 @@ def gem(gem_name, *requirements) # :doc:
       gem_name = gem_name.name
     end
 
-    dep = Gem::Dependency.new(gem_name, *requirements)
-
-    loaded = Gem.loaded_specs[gem_name]
-
-    return false if loaded && dep.matches_spec?(loaded)
-
-    spec = dep.to_spec
-
-    Gem::LOADED_SPECS_MUTEX.synchronize {
-      spec.activate
-    } if spec
+    spec = Gem::Dependency.new(gem_name, *requirements).to_spec
+    spec.activate if spec
   end
 
   private :gem

diff --git a/lib/ruby/shared/rubygems/core_ext/kernel_require.rb b/lib/ruby/shared/rubygems/core_ext/kernel_require.rb
@@ -50,8 +50,12 @@ def require path
     # normal require handle loading a gem from the rescue below.
 
     if Gem::Specification.unresolved_deps.empty? then
-      RUBYGEMS_ACTIVATION_MONITOR.exit
-      return gem_original_require(path)
+      begin
+        RUBYGEMS_ACTIVATION_MONITOR.exit
+        return gem_original_require(path)
+      ensure
+        RUBYGEMS_ACTIVATION_MONITOR.enter
+      end
     end
 
     # If +path+ is for a gem that has already been loaded, don't
@@ -66,7 +70,9 @@ def require path
 
     begin
       RUBYGEMS_ACTIVATION_MONITOR.exit
-      return gem_original_require(spec.to_fullpath(path) || path)
+      return gem_original_require(path)
+    ensure
+      RUBYGEMS_ACTIVATION_MONITOR.enter
     end if spec
 
     # Attempt to find +path+ in any unresolved gems...
@@ -99,7 +105,6 @@ def require path
       names = found_specs.map(&:name).uniq
 
       if names.size > 1 then
-        RUBYGEMS_ACTIVATION_MONITOR.exit
         raise Gem::LoadError, "#{path} found in multiple gems: #{names.join ', '}"
       end
 
@@ -110,27 +115,32 @@ def require path
       unless valid then
         le = Gem::LoadError.new "unable to find a version of '#{names.first}' to activate"
         le.name = names.first
-        RUBYGEMS_ACTIVATION_MONITOR.exit
         raise le
       end
 
       valid.activate
     end
 
-    RUBYGEMS_ACTIVATION_MONITOR.exit
-    return gem_original_require(path)
+    begin
+      RUBYGEMS_ACTIVATION_MONITOR.exit
+      return gem_original_require(path)
+    ensure
+      RUBYGEMS_ACTIVATION_MONITOR.enter
+    end
   rescue LoadError => load_error
-    RUBYGEMS_ACTIVATION_MONITOR.enter
-
     if load_error.message.start_with?("Could not find") or
         (load_error.message.end_with?(path) and Gem.try_activate(path)) then
-      RUBYGEMS_ACTIVATION_MONITOR.exit
-      return gem_original_require(path)
-    else
-      RUBYGEMS_ACTIVATION_MONITOR.exit
+      begin
+        RUBYGEMS_ACTIVATION_MONITOR.exit
+        return gem_original_require(path)
+      ensure
+        RUBYGEMS_ACTIVATION_MONITOR.enter
+      end
     end
 
     raise load_error
+  ensure
+    RUBYGEMS_ACTIVATION_MONITOR.exit
   end
 
   private :require

diff --git a/lib/ruby/shared/rubygems/defaults.rb b/lib/ruby/shared/rubygems/defaults.rb
@@ -29,39 +29,28 @@ def self.default_spec_cache_dir
   def self.default_dir
     path = if defined? RUBY_FRAMEWORK_VERSION then
              [
-               File.dirname(RbConfig::CONFIG['sitedir']),
+               File.dirname(ConfigMap[:sitedir]),
                'Gems',
-               RbConfig::CONFIG['ruby_version']
+               ConfigMap[:ruby_version]
              ]
-           elsif RbConfig::CONFIG['rubylibprefix'] then
+           elsif ConfigMap[:rubylibprefix] then
              [
-              RbConfig::CONFIG['rubylibprefix'],
+              ConfigMap[:rubylibprefix],
               'gems',
-              RbConfig::CONFIG['ruby_version']
+              ConfigMap[:ruby_version]
              ]
            else
              [
-               RbConfig::CONFIG['libdir'],
+               ConfigMap[:libdir],
                ruby_engine,
                'gems',
-               RbConfig::CONFIG['ruby_version']
+               ConfigMap[:ruby_version]
              ]
            end
 
     @default_dir ||= File.join(*path)
   end
 
-  ##
-  # Returns binary extensions dir for specified RubyGems base dir or nil
-  # if such directory cannot be determined.
-  #
-  # By default, the binary extensions are located side by side with their
-  # Ruby counterparts, therefore nil is returned
-
-  def self.default_ext_dir_for base_dir
-    nil
-  end
-
   ##
   # Paths where RubyGems' .rb files and bin files are installed
 
@@ -74,7 +63,7 @@ def self.default_rubygems_dirs
 
   def self.user_dir
     parts = [Gem.user_home, '.gem', ruby_engine]
-    parts << RbConfig::CONFIG['ruby_version'] unless RbConfig::CONFIG['ruby_version'].empty?
+    parts << ConfigMap[:ruby_version] unless ConfigMap[:ruby_version].empty?
     File.join parts
   end
 
@@ -89,18 +78,18 @@ def self.path_separator
   # Default gem load path
 
   def self.default_path
-    path = []
-    path << user_dir if user_home && File.exist?(user_home)
-    path << default_dir
-    path << vendor_dir if vendor_dir and File.directory? vendor_dir
-    path
+    if Gem.user_home && File.exist?(Gem.user_home) then
+      [user_dir, default_dir]
+    else
+      [default_dir]
+    end
   end
 
   ##
   # Deduce Ruby's --program-prefix and --program-suffix from its install name
 
   def self.default_exec_format
-    exec_format = RbConfig::CONFIG['ruby_install_name'].sub('ruby', '%s') rescue '%s'
+    exec_format = ConfigMap[:ruby_install_name].sub('ruby', '%s') rescue '%s'
 
     unless exec_format =~ /%s/ then
       raise Gem::Exception,
@@ -117,7 +106,7 @@ def self.default_bindir
     if defined? RUBY_FRAMEWORK_VERSION then # mac framework support
       '/usr/bin'
     else # generic install
-      RbConfig::CONFIG['bindir']
+      ConfigMap[:bindir]
     end
   end
 
@@ -152,26 +141,4 @@ def self.default_cert_path
   def self.default_gems_use_full_paths?
     ruby_engine != 'ruby'
   end
-
-  ##
-  # Install extensions into lib as well as into the extension directory.
-
-  def self.install_extension_in_lib # :nodoc:
-    true
-  end
-
-  ##
-  # Directory where vendor gems are installed.
-
-  def self.vendor_dir # :nodoc:
-    if vendor_dir = ENV['GEM_VENDOR'] then
-      return vendor_dir.dup
-    end
-
-    return nil unless RbConfig::CONFIG.key? 'vendordir'
-
-    File.join RbConfig::CONFIG['vendordir'], 'gems',
-              RbConfig::CONFIG['ruby_version']
-  end
-
 end
diff --git a/lib/ruby/shared/rubygems/dependency.rb b/lib/ruby/shared/rubygems/dependency.rb
@@ -74,7 +74,7 @@ def hash # :nodoc:
   end
 
   def inspect # :nodoc:
-    if prerelease? then
+    if @prerelease
       "<%s type=%p name=%p requirements=%p prerelease=ok>" %
         [self.class, self.type, self.name, requirement.to_s]
     else
@@ -145,6 +145,7 @@ def requirement
     @requirement = @version_requirements if defined?(@version_requirements)
   end
 
+  # DOC: this method needs documentation or :nodoc''d
   def requirements_list
     requirement.as_list
   end
@@ -204,19 +205,9 @@ def =~ other
 
   alias === =~
 
-  ##
-  # :call-seq:
-  #   dep.match? name          => true or false
-  #   dep.match? name, version => true or false
-  #   dep.match? spec          => true or false
-  #
-  # Does this dependency match the specification described by +name+ and
-  # +version+ or match +spec+?
-  #
-  # NOTE:  Unlike #matches_spec? this method does not return true when the
-  # version is a prerelease version unless this is a prerelease dependency.
+  # DOC: this method needs either documented or :nodoc'd
 
-  def match? obj, version=nil, allow_prerelease=false
+  def match? obj, version=nil
     if !version
       name = obj.name
       version = obj.version
@@ -225,23 +216,12 @@ def match? obj, version=nil, allow_prerelease=false
     end
 
     return false unless self.name === name
+    return true if requirement.none?
 
-    version = Gem::Version.new version
-
-    return true if requirement.none? and not version.prerelease?
-    return false if version.prerelease? and
-                    not allow_prerelease and
-                    not prerelease?
-
-    requirement.satisfied_by? version
+    requirement.satisfied_by? Gem::Version.new(version)
   end
 
-  ##
-  # Does this dependency match +spec+?
-  #
-  # NOTE:  This is not a convenience method.  Unlike #match? this method
-  # returns true when +spec+ is a prerelease version even if this dependency
-  # is not a prerelease dependency.
+  # DOC: this method needs either documented or :nodoc'd
 
   def matches_spec? spec
     return false unless name === spec.name
@@ -269,6 +249,8 @@ def merge other
     self.class.new name, self_req.as_list.concat(other_req.as_list)
   end
 
+  # DOC: this method needs either documented or :nodoc'd
+
   def matching_specs platform_only = false
     matches = Gem::Specification.stubs.find_all { |spec|
       self.name === spec.name and # TODO: == instead of ===
@@ -281,7 +263,7 @@ def matching_specs platform_only = false
       }
     end
 
-    matches.sort_by { |s| s.sort_obj } # HACK: shouldn't be needed
+    matches = matches.sort_by { |s| s.sort_obj } # HACK: shouldn't be needed
   end
 
   ##
@@ -291,6 +273,8 @@ def specific?
     @requirement.specific?
   end
 
+  # DOC: this method needs either documented or :nodoc'd
+
   def to_specs
     matches = matching_specs true
 
@@ -303,13 +287,12 @@ def to_specs
 
       if specs.empty?
         total = Gem::Specification.to_a.size
-        msg   = "Could not find '#{name}' (#{requirement}) among #{total} total gem(s)\n"
+        error = Gem::LoadError.new \
+          "Could not find '#{name}' (#{requirement}) among #{total} total gem(s)"
       else
-        msg   = "Could not find '#{name}' (#{requirement}) - did find: [#{specs.join ','}]\n"
+        error = Gem::LoadError.new \
+          "Could not find '#{name}' (#{requirement}) - did find: [#{specs.join ','}]"
       end
-      msg << "Checked in 'GEM_PATH=#{Gem.path.join(File::PATH_SEPARATOR)}', execute `gem env` for more information"
-
-      error = Gem::LoadError.new(msg)
       error.name        = self.name
       error.requirement = self.requirement
       raise error
@@ -320,15 +303,11 @@ def to_specs
     matches
   end
 
+  # DOC: this method needs either documented or :nodoc'd
+
   def to_spec
     matches = self.to_specs
 
-    active = matches.find { |spec| spec.activated? }
-
-    return active if active
-
-    matches.delete_if { |spec| spec.version.prerelease? } unless prerelease?
-
-    matches.last
+    matches.find { |spec| spec.activated? } or matches.last
   end
 end
diff --git a/lib/ruby/shared/rubygems/dependency_installer.rb b/lib/ruby/shared/rubygems/dependency_installer.rb
@@ -1,5 +1,6 @@
 require 'rubygems'
 require 'rubygems/dependency_list'
+require 'rubygems/dependency_resolver'
 require 'rubygems/package'
 require 'rubygems/installer'
 require 'rubygems/spec_fetcher'
@@ -72,7 +73,6 @@ class Gem::DependencyInstaller
   def initialize options = {}
     @only_install_dir = !!options[:install_dir]
     @install_dir = options[:install_dir] || Gem.dir
-    @build_root = options[:build_root]
 
     options = DEFAULT_OPTIONS.merge options
 
@@ -103,7 +103,7 @@ def initialize options = {}
 
     @cache_dir = options[:cache_dir] || @install_dir
 
-    @errors = []
+    @errors = nil
   end
 
   ##
@@ -158,7 +158,6 @@ def add_found_dependencies to_do, dependency_list # :nodoc:
 
     dependency_list.remove_specs_unsatisfied_by dependencies
   end
-
   ##
   # Creates an AvailableSet to install from based on +dep_or_name+ and
   # +version+
@@ -197,7 +196,7 @@ def consider_remote?
   # sources.  Gems are sorted with newer gems preferred over older gems, and
   # local gems preferred over remote gems.
 
-  def find_gems_with_sources dep, best_only=false # :nodoc:
+  def find_gems_with_sources dep # :nodoc:
     set = Gem::AvailableSet.new
 
     if consider_local?
@@ -212,42 +211,23 @@ def find_gems_with_sources dep, best_only=false # :nodoc:
 
     if consider_remote?
       begin
-        # TODO this is pulled from #spec_for_dependency to allow
-        # us to filter tuples before fetching specs.
-        #
-        tuples, errors = Gem::SpecFetcher.fetcher.search_for_dependency dep
-
-        if best_only && !tuples.empty?
-          tuples.sort! { |a,b| b[0].version <=> a[0].version }
-          tuples = [tuples.first]
-        end
-
-        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
+        found, errors = Gem::SpecFetcher.fetcher.spec_for_dependency dep
 
         if @errors
           @errors += errors
         else
           @errors = errors
         end
 
-        set << specs
+        set << found
 
       rescue Gem::RemoteFetcher::FetchError => e
         # FIX if there is a problem talking to the network, we either need to always tell
         # the user (no really_verbose) or fail hard, not silently tell them that we just
         # couldn't find their requested gem.
-        verbose do
-          "Error fetching remote data:\t\t#{e.message}\n" \
-            "Falling back to local-only install"
+        if Gem.configuration.really_verbose then
+          say "Error fetching remote data:\t\t#{e.message}"
+          say "Falling back to local-only install"
         end
         @domain = :local
       end
@@ -270,14 +250,6 @@ def find_spec_by_name_and_version gem_name,
       if gem_name =~ /\.gem$/ and File.file? gem_name then
         src = Gem::Source::SpecificFile.new(gem_name)
         set.add src.spec, src
-      elsif gem_name =~ /\.gem$/ then
-        Dir[gem_name].each do |name|
-          begin
-            src = Gem::Source::SpecificFile.new name
-            set.add src.spec, src
-          rescue Gem::Package::FormatError
-          end
-        end
       else
         local = Gem::Source::Local.new
 
@@ -291,7 +263,7 @@ def find_spec_by_name_and_version gem_name,
       dep = Gem::Dependency.new gem_name, version
       dep.prerelease = true if prerelease
 
-      set = find_gems_with_sources(dep, true)
+      set = find_gems_with_sources(dep)
       set.match_platform!
     end
 
@@ -306,7 +278,7 @@ def find_spec_by_name_and_version gem_name,
   # Gathers all dependencies necessary for the installation from local and
   # remote sources unless the ignore_dependencies was given.
   #--
-  # TODO remove at RubyGems 3
+  # TODO remove, no longer used
 
   def gather_dependencies # :nodoc:
     specs = @available.all_specs
@@ -377,16 +349,13 @@ def install dep_or_name, version = Gem::Requirement.default
     options = {
       :bin_dir             => @bin_dir,
       :build_args          => @build_args,
-      :document            => @document,
       :env_shebang         => @env_shebang,
       :force               => @force,
       :format_executable   => @format_executable,
       :ignore_dependencies => @ignore_dependencies,
-      :prerelease          => @prerelease,
       :security_policy     => @security_policy,
       :user_install        => @user_install,
       :wrappers            => @wrappers,
-      :build_root          => @build_root,
       :install_as_default  => @install_as_default
     }
     options[:install_dir] = @install_dir if @only_install_dir
@@ -420,59 +389,23 @@ def install_development_deps # :nodoc:
   end
 
   def resolve_dependencies dep_or_name, version # :nodoc:
-    request_set = Gem::RequestSet.new
-    request_set.development         = @development
-    request_set.development_shallow = @dev_shallow
+    as = available_set_for dep_or_name, version
+
+    request_set = as.to_request_set install_development_deps
     request_set.soft_missing = @force
-    request_set.prerelease = @prerelease
-    request_set.remote = false unless consider_remote?
 
-    installer_set = Gem::Resolver::InstallerSet.new @domain
+    installer_set = Gem::DependencyResolver::InstallerSet.new @domain
+    installer_set.always_install.concat request_set.always_install
     installer_set.ignore_installed = @only_install_dir
 
-    if consider_local?
-      if dep_or_name =~ /\.gem$/ and File.file? dep_or_name then
-        src = Gem::Source::SpecificFile.new dep_or_name
-        installer_set.add_local dep_or_name, src.spec, src
-        version = src.spec.version if version == Gem::Requirement.default
-      elsif dep_or_name =~ /\.gem$/ then
-        Dir[dep_or_name].each do |name|
-          begin
-            src = Gem::Source::SpecificFile.new name
-            installer_set.add_local dep_or_name, src.spec, src
-          rescue Gem::Package::FormatError
-          end
-        end
-      # else This is a dependency. InstallerSet handles this case
-      end
-    end
-
-    dependency =
-      if spec = installer_set.local?(dep_or_name) then
-        Gem::Dependency.new spec.name, version
-      elsif String === dep_or_name then
-        Gem::Dependency.new dep_or_name, version
-      else
-        dep_or_name
-      end
-
-    dependency.prerelease = @prerelease
-
-    request_set.import [dependency]
-
-    installer_set.add_always_install dependency
-
-    request_set.always_install = installer_set.always_install
-
     if @ignore_dependencies then
       installer_set.ignore_dependencies = true
-      request_set.ignore_dependencies   = true
-      request_set.soft_missing          = true
+      request_set.soft_missing = true
     end
 
-    request_set.resolve installer_set
+    composed_set = Gem::DependencyResolver.compose_sets as, installer_set
 
-    @errors.concat request_set.errors
+    request_set.resolve composed_set
 
     request_set
   end

diff --git a/lib/ruby/shared/rubygems/dependency_list.rb b/lib/ruby/shared/rubygems/dependency_list.rb
@@ -219,7 +219,11 @@ def tsort_each_child(node)
     dependencies.each do |dep|
       specs.each do |spec|
         if spec.satisfies_requirement? dep then
-          yield spec
+          begin
+            yield spec
+          rescue TSort::Cyclic
+            # do nothing
+          end
           break
         end
       end

diff --git a/lib/ruby/shared/rubygems/dependency_resolver.rb b/lib/ruby/shared/rubygems/dependency_resolver.rb
@@ -0,0 +1,254 @@
+require 'rubygems'
+require 'rubygems/dependency'
+require 'rubygems/exceptions'
+require 'rubygems/util/list'
+
+require 'uri'
+require 'net/http'
+
+##
+# Given a set of Gem::Dependency objects as +needed+ and a way to query the
+# set of available specs via +set+, calculates a set of ActivationRequest
+# objects which indicate all the specs that should be activated to meet the
+# all the requirements.
+
+class Gem::DependencyResolver
+
+  ##
+  # Contains all the conflicts encountered while doing resolution
+
+  attr_reader :conflicts
+
+  attr_accessor :development
+
+  attr_reader :missing
+
+  ##
+  # When a missing dependency, don't stop. Just go on and record what was
+  # missing.
+
+  attr_accessor :soft_missing
+
+  def self.compose_sets *sets
+    Gem::DependencyResolver::ComposedSet.new(*sets)
+  end
+
+  ##
+  # Provide a DependencyResolver that queries only against the already
+  # installed gems.
+
+  def self.for_current_gems needed
+    new needed, Gem::DependencyResolver::CurrentSet.new
+  end
+
+  ##
+  # Create DependencyResolver object which will resolve the tree starting
+  # with +needed+ Depedency objects.
+  #
+  # +set+ is an object that provides where to look for specifications to
+  # satisify the Dependencies. This defaults to IndexSet, which will query
+  # rubygems.org.
+
+  def initialize needed, set = nil
+    @set = set || Gem::DependencyResolver::IndexSet.new
+    @needed = needed
+
+    @conflicts    = nil
+    @development  = false
+    @missing      = []
+    @soft_missing = false
+  end
+
+  def requests s, act, reqs=nil
+    s.dependencies.reverse_each do |d|
+      next if d.type == :development and not @development
+      reqs = Gem::List.new Gem::DependencyResolver::DependencyRequest.new(d, act), reqs
+    end
+
+    @set.prefetch reqs
+
+    reqs
+  end
+
+  ##
+  # Proceed with resolution! Returns an array of ActivationRequest objects.
+
+  def resolve
+    @conflicts = []
+
+    needed = nil
+
+    @needed.reverse_each do |n|
+      request = Gem::DependencyResolver::DependencyRequest.new n, nil
+
+      needed = Gem::List.new request, needed
+    end
+
+    res = resolve_for needed, nil
+
+    raise Gem::DependencyResolutionError, res if
+      res.kind_of? Gem::DependencyResolver::DependencyConflict
+
+    res.to_a
+  end
+
+  ##
+  # The meat of the algorithm. Given +needed+ DependencyRequest objects and
+  # +specs+ being a list to ActivationRequest, calculate a new list of
+  # ActivationRequest objects.
+
+  def resolve_for needed, specs
+    while needed
+      dep = needed.value
+      needed = needed.tail
+
+      # If there is already a spec activated for the requested name...
+      if specs && existing = specs.find { |s| dep.name == s.name }
+
+        # then we're done since this new dep matches the
+        # existing spec.
+        next if dep.matches_spec? existing
+
+        # There is a conflict! We return the conflict
+        # object which will be seen by the caller and be
+        # handled at the right level.
+
+        # If the existing activation indicates that there
+        # are other possibles for it, then issue the conflict
+        # on the dep for the activation itself. Otherwise, issue
+        # it on the requester's request itself.
+        #
+        if existing.others_possible?
+          conflict =
+            Gem::DependencyResolver::DependencyConflict.new dep, existing
+        else
+          depreq = existing.request.requester.request
+          conflict =
+            Gem::DependencyResolver::DependencyConflict.new depreq, existing, dep
+        end
+        @conflicts << conflict
+
+        return conflict
+      end
+
+      # Get a list of all specs that satisfy dep and platform
+      possible = @set.find_all dep
+      possible = select_local_platforms possible
+
+      case possible.size
+      when 0
+        @missing << dep
+
+        unless @soft_missing
+          # If there are none, then our work here is done.
+          raise Gem::UnsatisfiableDependencyError, dep
+        end
+      when 1
+        # If there is one, then we just add it to specs
+        # and process the specs dependencies by adding
+        # them to needed.
+
+        spec = possible.first
+        act = Gem::DependencyResolver::ActivationRequest.new spec, dep, false
+
+        specs = Gem::List.prepend specs, act
+
+        # Put the deps for at the beginning of needed
+        # rather than the end to match the depth first
+        # searching done by the multiple case code below.
+        #
+        # This keeps the error messages consistent.
+        needed = requests(spec, act, needed)
+      else
+        # There are multiple specs for this dep. This is
+        # the case that this class is built to handle.
+
+        # Sort them so that we try the highest versions
+        # first.
+        possible = possible.sort_by do |s|
+          [s.source, s.version, s.platform == Gem::Platform::RUBY ? -1 : 1]
+        end
+
+        # We track the conflicts seen so that we can report them
+        # to help the user figure out how to fix the situation.
+        conflicts = []
+
+        # To figure out which to pick, we keep resolving
+        # given each one being activated and if there isn't
+        # a conflict, we know we've found a full set.
+        #
+        # We use an until loop rather than #reverse_each
+        # to keep the stack short since we're using a recursive
+        # algorithm.
+        #
+        until possible.empty?
+          s = possible.pop
+
+          # Recursively call #resolve_for with this spec
+          # and add it's dependencies into the picture...
+
+          act = Gem::DependencyResolver::ActivationRequest.new s, dep
+
+          try = requests(s, act, needed)
+
+          res = resolve_for try, Gem::List.prepend(specs, act)
+
+          # While trying to resolve these dependencies, there may
+          # be a conflict!
+
+          if res.kind_of? Gem::DependencyResolver::DependencyConflict
+            # The conflict might be created not by this invocation
+            # but rather one up the stack, so if we can't attempt
+            # to resolve this conflict (conflict isn't with the spec +s+)
+            # then just return it so the caller can try to sort it out.
+            return res unless res.for_spec? s
+
+            # Otherwise, this is a conflict that we can attempt to fix
+            conflicts << [s, res]
+
+            # Optimization:
+            #
+            # Because the conflict indicates the dependency that trigger
+            # it, we can prune possible based on this new information.
+            #
+            # This cuts down on the number of iterations needed.
+            possible.delete_if { |x| !res.dependency.matches_spec? x }
+          else
+            # No conflict, return the specs
+            return res
+          end
+        end
+
+        # We tried all possibles and nothing worked, so we let the user
+        # know and include as much information about the problem since
+        # the user is going to have to take action to fix this.
+        raise Gem::ImpossibleDependenciesError.new(dep, conflicts)
+      end
+    end
+
+    specs
+  end
+
+  ##
+  # Returns the gems in +specs+ that match the local platform.
+
+  def select_local_platforms specs # :nodoc:
+    specs.select do |spec|
+      Gem::Platform.match spec.platform
+    end
+  end
+
+end
+
+require 'rubygems/dependency_resolver/api_set'
+require 'rubygems/dependency_resolver/api_specification'
+require 'rubygems/dependency_resolver/activation_request'
+require 'rubygems/dependency_resolver/composed_set'
+require 'rubygems/dependency_resolver/current_set'
+require 'rubygems/dependency_resolver/dependency_conflict'
+require 'rubygems/dependency_resolver/dependency_request'
+require 'rubygems/dependency_resolver/index_set'
+require 'rubygems/dependency_resolver/index_specification'
+require 'rubygems/dependency_resolver/installed_specification'
+require 'rubygems/dependency_resolver/installer_set'
+
diff --git a/lib/ruby/shared/rubygems/dependency_resolver/activation_request.rb b/lib/ruby/shared/rubygems/dependency_resolver/activation_request.rb
@@ -0,0 +1,109 @@
+##
+# Specifies a Specification object that should be activated.
+# Also contains a dependency that was used to introduce this
+# activation.
+
+class Gem::DependencyResolver::ActivationRequest
+
+  attr_reader :request
+
+  attr_reader :spec
+
+  def initialize spec, req, others_possible = true
+    @spec = spec
+    @request = req
+    @others_possible = others_possible
+  end
+
+  def == other
+    case other
+    when Gem::Specification
+      @spec == other
+    when Gem::DependencyResolver::ActivationRequest
+      @spec == other.spec && @request == other.request
+    else
+      false
+    end
+  end
+
+  def download path
+    if @spec.respond_to? :source
+      source = @spec.source
+    else
+      source = Gem.sources.first
+    end
+
+    Gem.ensure_gem_subdirectories path
+
+    source.download full_spec, path
+  end
+
+  def full_name
+    @spec.full_name
+  end
+
+  def full_spec
+    Gem::Specification === @spec ? @spec : @spec.spec
+  end
+
+  def inspect # :nodoc:
+    others_possible = nil
+    others_possible = ' (others possible)' if @others_possible
+
+    '#<%s for %p from %s%s>' % [
+      self.class, @spec, @request, others_possible
+    ]
+  end
+
+  ##
+  # Indicates if the requested gem has already been installed.
+
+  def installed?
+    this_spec = full_spec
+
+    Gem::Specification.any? do |s|
+      s == this_spec
+    end
+  end
+
+  def name
+    @spec.name
+  end
+
+  ##
+  # Indicate if this activation is one of a set of possible
+  # requests for the same Dependency request.
+
+  def others_possible?
+    @others_possible
+  end
+
+  ##
+  # Return the ActivationRequest that contained the dependency
+  # that we were activated for.
+
+  def parent
+    @request.requester
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 2, '[Activation request', ']' do
+      q.breakable
+      q.pp @spec
+
+      q.breakable
+      q.text ' for '
+      q.pp @request
+
+
+      q.breakable
+      q.text ' (other possible)' if @others_possible
+    end
+  end
+
+  def version
+    @spec.version
+  end
+
+end
+
diff --git a/lib/ruby/shared/rubygems/dependency_resolver/api_set.rb b/lib/ruby/shared/rubygems/dependency_resolver/api_set.rb
@@ -0,0 +1,65 @@
+##
+# The global rubygems pool, available via the rubygems.org API.
+# Returns instances of APISpecification.
+
+class Gem::DependencyResolver::APISet
+
+  def initialize
+    @data = Hash.new { |h,k| h[k] = [] }
+    @dep_uri = URI 'https://rubygems.org/api/v1/dependencies'
+  end
+
+  ##
+  # Return an array of APISpecification objects matching
+  # DependencyRequest +req+.
+
+  def find_all req
+    res = []
+
+    versions(req.name).each do |ver|
+      if req.dependency.match? req.name, ver[:number]
+        res << Gem::DependencyResolver::APISpecification.new(self, ver)
+      end
+    end
+
+    res
+  end
+
+  ##
+  # A hint run by the resolver to allow the Set to fetch
+  # data for DependencyRequests +reqs+.
+
+  def prefetch reqs
+    names = reqs.map { |r| r.dependency.name }
+    needed = names.find_all { |d| !@data.key?(d) }
+
+    return if needed.empty?
+
+    uri = @dep_uri + "?gems=#{needed.sort.join ','}"
+    str = Gem::RemoteFetcher.fetcher.fetch_path uri
+
+    Marshal.load(str).each do |ver|
+      @data[ver[:name]] << ver
+    end
+  end
+
+  ##
+  # Return data for all versions of the gem +name+.
+
+  def versions name
+    if @data.key?(name)
+      return @data[name]
+    end
+
+    uri = @dep_uri + "?gems=#{name}"
+    str = Gem::RemoteFetcher.fetcher.fetch_path uri
+
+    Marshal.load(str).each do |ver|
+      @data[ver[:name]] << ver
+    end
+
+    @data[name]
+  end
+
+end
+
diff --git a/lib/ruby/shared/rubygems/dependency_resolver/api_specification.rb b/lib/ruby/shared/rubygems/dependency_resolver/api_specification.rb
@@ -0,0 +1,39 @@
+##
+# Represents a specification retrieved via the rubygems.org
+# API. This is used to avoid having to load the full
+# Specification object when all we need is the name, version,
+# and dependencies.
+
+class Gem::DependencyResolver::APISpecification
+
+  attr_reader :dependencies
+  attr_reader :name
+  attr_reader :platform
+  attr_reader :set # :nodoc:
+  attr_reader :version
+
+  def initialize(set, api_data)
+    @set = set
+    @name = api_data[:name]
+    @version = Gem::Version.new api_data[:number]
+    @platform = api_data[:platform]
+    @dependencies = api_data[:dependencies].map do |name, ver|
+      Gem::Dependency.new name, ver.split(/\s*,\s*/)
+    end
+  end
+
+  def == other # :nodoc:
+    self.class === other and
+      @set          == other.set and
+      @name         == other.name and
+      @version      == other.version and
+      @platform     == other.platform and
+      @dependencies == other.dependencies
+  end
+
+  def full_name
+    "#{@name}-#{@version}"
+  end
+
+end
+
diff --git a/lib/ruby/shared/rubygems/dependency_resolver/composed_set.rb b/lib/ruby/shared/rubygems/dependency_resolver/composed_set.rb
@@ -0,0 +1,18 @@
+class Gem::DependencyResolver::ComposedSet
+
+  def initialize *sets
+    @sets = sets
+  end
+
+  def find_all req
+    res = []
+    @sets.each { |s| res += s.find_all(req) }
+    res
+  end
+
+  def prefetch reqs
+    @sets.each { |s| s.prefetch(reqs) }
+  end
+
+end
+
diff --git a/...y/shared/rubygems/resolver/current_set.rb → ...bygems/dependency_resolver/current_set.rb b/...y/shared/rubygems/resolver/current_set.rb → ...bygems/dependency_resolver/current_set.rb
@@ -3,11 +3,14 @@
 # all the normal settings that control where to look
 # for installed gems.
 
-class Gem::Resolver::CurrentSet < Gem::Resolver::Set
+class Gem::DependencyResolver::CurrentSet
 
   def find_all req
     req.dependency.matching_specs
   end
 
+  def prefetch gems
+  end
+
 end
 
diff --git a/lib/ruby/shared/rubygems/dependency_resolver/dependency_conflict.rb b/lib/ruby/shared/rubygems/dependency_resolver/dependency_conflict.rb
@@ -0,0 +1,85 @@
+##
+# Used internally to indicate that a dependency conflicted
+# with a spec that would be activated.
+
+class Gem::DependencyResolver::DependencyConflict
+
+  attr_reader :activated
+
+  attr_reader :dependency
+
+  def initialize(dependency, activated, failed_dep=dependency)
+    @dependency = dependency
+    @activated = activated
+    @failed_dep = failed_dep
+  end
+
+  ##
+  # Return the 2 dependency objects that conflicted
+
+  def conflicting_dependencies
+    [@failed_dep.dependency, @activated.request.dependency]
+  end
+
+  ##
+  # Explanation of the conflict used by exceptions to print useful messages
+
+  def explanation
+    activated   = @activated.spec.full_name
+    requirement = @failed_dep.dependency.requirement
+
+    "  Activated %s instead of (%s) via:\n    %s\n" % [
+      activated, requirement, request_path.join(', ')
+    ]
+  end
+
+  def for_spec?(spec)
+    @dependency.name == spec.name
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 2, '[Dependency conflict: ', ']' do
+      q.breakable
+
+      q.text 'activated '
+      q.pp @activated
+
+      q.breakable
+      q.text ' dependency '
+      q.pp @dependency
+
+      q.breakable
+      if @dependency == @failed_dep then
+        q.text ' failed'
+      else
+        q.text ' failed dependency '
+        q.pp @failed_dep
+      end
+    end
+  end
+
+  ##
+  # Path of specifications that requested this dependency
+
+  def request_path
+    current = requester
+    path    = []
+
+    while current do
+      path << current.spec.full_name
+
+      current = current.request.requester
+    end
+
+    path
+  end
+
+  ##
+  # Return the Specification that listed the dependency
+
+  def requester
+    @failed_dep.requester
+  end
+
+end
+