* lib/rubygems: Update to RubyGems master ddac51f. Changes:

  * Allow override for the shared gem installation directory for
    rubygems packagers.

  * Lock gem cache files for read and write to improve thread safety.

  * Use io/console when available.

  * Minor cleanup.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44157 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

9 files changed, 69 insertions, 65 deletions

diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index 732005fb9a..9baee34b2d 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -764,7 +764,10 @@ module Gem
   # Safely read a file in binary mode on all platforms.
 
   def self.read_binary(path)
-    File.open path, binary_mode do |f| f.read end
+    File.open path, binary_mode do |f| 
+      f.flock(File::LOCK_EX)
+      f.read 
+    end
   end
 
   ##
@@ -1163,17 +1166,18 @@ module Gem
   autoload :ConfigFile,         'rubygems/config_file'
   autoload :Dependency,         'rubygems/dependency'
   autoload :DependencyList,     'rubygems/dependency_list'
-  autoload :Resolver,           'rubygems/resolver'
   autoload :DependencyResolver, 'rubygems/resolver'
+  autoload :Installer,          'rubygems/installer'
   autoload :PathSupport,        'rubygems/path_support'
   autoload :Platform,           'rubygems/platform'
   autoload :RequestSet,         'rubygems/request_set'
   autoload :Requirement,        'rubygems/requirement'
+  autoload :Resolver,           'rubygems/resolver'
+  autoload :Source,             'rubygems/source'
   autoload :SourceList,         'rubygems/source_list'
   autoload :SpecFetcher,        'rubygems/spec_fetcher'
   autoload :Specification,      'rubygems/specification'
   autoload :Version,            'rubygems/version'
-  autoload :Source,             'rubygems/source'
 
   require "rubygems/specification"
 end
diff --git a/lib/rubygems/basic_specification.rb b/lib/rubygems/basic_specification.rb
index 6cc13bb539..a52377ff22 100644
--- a/lib/rubygems/basic_specification.rb
+++ b/lib/rubygems/basic_specification.rb
@@ -72,9 +72,16 @@ class Gem::BasicSpecification
   # Returns full path to the directory where gem's extensions are installed.
 
   def extension_dir
-    @extension_dir ||=
-      File.join base_dir, 'extensions', Gem::Platform.local.to_s,
-                Gem.extension_api_version, full_name
+    @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:
@@ -147,7 +154,9 @@ class Gem::BasicSpecification
     @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
   end
diff --git a/lib/rubygems/defaults.rb b/lib/rubygems/defaults.rb
index 591580b7da..e4bf4e5a7f 100644
--- a/lib/rubygems/defaults.rb
+++ b/lib/rubygems/defaults.rb
@@ -52,6 +52,17 @@ module Gem
   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
 
   def self.default_rubygems_dirs
diff --git a/lib/rubygems/remote_fetcher.rb b/lib/rubygems/remote_fetcher.rb
index c6816e8f0f..e32c024989 100644
--- a/lib/rubygems/remote_fetcher.rb
+++ b/lib/rubygems/remote_fetcher.rb
@@ -292,6 +292,7 @@ class Gem::RemoteFetcher
 
       if update and path then
         open(path, 'wb') do |io|
+          io.flock(File::LOCK_EX)
           io.write data
         end
       end
diff --git a/lib/rubygems/request_set.rb b/lib/rubygems/request_set.rb
index 68a8112c37..24bd6d1109 100644
--- a/lib/rubygems/request_set.rb
+++ b/lib/rubygems/request_set.rb
@@ -1,8 +1,4 @@
 require 'rubygems'
-require 'rubygems/dependency'
-require 'rubygems/dependency_list'
-require 'rubygems/installer'
-require 'rubygems/resolver'
 require 'tsort'
 
 ##
diff --git a/lib/rubygems/source/git.rb b/lib/rubygems/source/git.rb
index 522acea217..28178a5f4f 100644
--- a/lib/rubygems/source/git.rb
+++ b/lib/rubygems/source/git.rb
@@ -9,9 +9,7 @@ require 'rubygems/util'
 #   source =
 #     Gem::Source::Git.new 'rake', 'git@example:rake.git', 'rake-10.1.0', false
 #
-#   spec = source.load_spec 'rake'
-#
-#   source.checkout
+#   source.specs
 
 class Gem::Source::Git < Gem::Source
 
@@ -187,15 +185,13 @@ class Gem::Source::Git < Gem::Source
         Dir.chdir directory do
           spec = Gem::Specification.load file
           if spec then
-            loaded_from = File.expand_path file
-            spec.loaded_from = loaded_from
             spec.base_dir = base_dir
 
             spec.extension_dir =
               File.join base_dir, 'extensions', Gem::Platform.local.to_s,
                 Gem.extension_api_version, "#{name}-#{dir_shortref}"
 
-            spec.full_gem_path = File.dirname loaded_from if spec
+            spec.full_gem_path = File.dirname spec.loaded_from if spec
           end
           spec
         end
diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index d2d10e1a0a..e9f126c6e1 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -1916,7 +1916,6 @@ class Gem::Specification < Gem::BasicSpecification
     @cache_dir     = nil
     @cache_file    = nil
     @doc_dir       = nil
-    @gem_dir       = nil
     @ri_dir        = nil
     @spec_dir      = nil
     @spec_file     = nil
diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index 314682f13b..8dc37d6720 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -24,16 +24,19 @@ unless Gem::Dependency.new('rdoc', '>= 3.10').matching_specs.empty?
   gem 'json'
 end
 
-require 'rubygems/deprecate'
 require 'minitest/autorun'
+
+require 'rubygems/deprecate'
+
 require 'fileutils'
+require 'pathname'
+require 'pp'
+require 'rubygems/package'
+require 'shellwords'
 require 'tmpdir'
 require 'uri'
-require 'rubygems/package'
-require 'pp'
 require 'zlib'
-require 'pathname'
-require 'shellwords'
+
 Gem.load_yaml
 
 require 'rubygems/mock_gem_ui'
diff --git a/lib/rubygems/user_interaction.rb b/lib/rubygems/user_interaction.rb
index fad29b4afd..f5e460f994 100644
--- a/lib/rubygems/user_interaction.rb
+++ b/lib/rubygems/user_interaction.rb
@@ -4,6 +4,11 @@
 # See LICENSE.txt for permissions.
 #++
 
+begin
+  require 'io/console'
+rescue LoadError
+end
+
 ##
 # Module that defines the default UserInteraction.  Any class including this
 # module will have access to the +ui+ method that returns the default UI.
@@ -283,41 +288,27 @@ class Gem::StreamUI
     result
   end
 
-  if RUBY_VERSION > '1.9.2' then
-    ##
-    # Ask for a password. Does not echo response to terminal.
-
-    def ask_for_password(question)
-      return nil if not tty?
-
-      require 'io/console'
-
-      @outs.print(question + "  ")
-      @outs.flush
+  ##
+  # Ask for a password. Does not echo response to terminal.
 
-      password = @ins.noecho {@ins.gets}
-      password.chomp! if password
-      password
-    end
-  else
-    ##
-    # Ask for a password. Does not echo response to terminal.
+  def ask_for_password(question)
+    return nil if not tty?
 
-    def ask_for_password(question)
-      return nil if not tty?
+    @outs.print(question, "  ")
+    @outs.flush
 
-      @outs.print(question + "  ")
-      @outs.flush
+    password = _gets_noecho
+    @outs.puts
+    password.chomp! if password
+    password
+  end
 
-      Gem.win_platform? ? ask_for_password_on_windows : ask_for_password_on_unix
+  if IO.method_defined?(:noecho) then
+    def _gets_noecho
+      @ins.noecho {@ins.gets}
     end
-
-    ##
-    # Asks for a password that works on windows. Ripped from the Heroku gem.
-
-    def ask_for_password_on_windows
-      return nil if not tty?
-
+  elsif Gem.win_platform?
+    def _gets_noecho
       require "Win32API"
       char = nil
       password = ''
@@ -330,22 +321,16 @@ class Gem::StreamUI
           password << char.chr
         end
       end
-
-      puts
       password
     end
-
-    ##
-    # Asks for a password that works on unix
-
-    def ask_for_password_on_unix
-      return nil if not tty?
-
+  else
+    def _gets_noecho
       system "stty -echo"
-      password = @ins.gets
-      password.chomp! if password
-      system "stty echo"
-      password
+      begin
+        @ins.gets
+      ensure
+        system "stty echo"
+      end
     end
   end