Pull rubygem's custom require into gem_prelude

This solves the gem loading issue by never touching $LOAD_PATH
in gem_prelude and instead loading all of rubygems more quickly.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28693 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 18 insertions, 12 deletions

diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index 51661159cc..42e189ed4a 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -1031,7 +1031,7 @@ end
 
 module Kernel
 
-  undef gem if respond_to? :gem # defined in gem_prelude.rb on 1.9
+  remove_method :gem if respond_to?(:gem, true) # defined in gem_prelude.rb on 1.9
 
   ##
   # Use Kernel#gem to activate a specific version of +gem_name+.
@@ -1109,14 +1109,24 @@ end
 
 require 'rubygems/config_file'
 
-Gem.remove_prelude_paths
+class << Gem
+  remove_method :try_activate if Gem.respond_to?(:try_activate, true)
+
+  def try_activate(path)
+    spec = Gem.searcher.find(path)
+    return false unless spec
+
+    Gem.activate(spec.name, "= #{spec.version}")
+    return true
+  end
+end
 
 ##
 # Enables the require hook for RubyGems.
 #
 # We remove the paths prelude added, so we need custom require to get
 # any gems now.
-require 'rubygems/custom_require'
+# require 'rubygems/custom_require'
 
 Gem.clear_paths
 
diff --git a/lib/rubygems/custom_require.rb b/lib/rubygems/custom_require.rb
index 43b3136b60..a410a3cfe0 100644
--- a/lib/rubygems/custom_require.rb
+++ b/lib/rubygems/custom_require.rb
@@ -4,8 +4,6 @@
 # See LICENSE.txt for permissions.
 #++
 
-require 'rubygems'
-
 module Kernel
 
   ##
@@ -30,17 +28,15 @@ module Kernel
   def require(path) # :doc:
     gem_original_require path
   rescue LoadError => load_error
-    if load_error.message.end_with?(path) and
-       spec = Gem.searcher.find(path) then
-      Gem.activate(spec.name, "= #{spec.version}")
-      gem_original_require path
-    else
-      raise load_error
+    if load_error.message.end_with?(path)
+      return true if Gem.try_activate(path)
     end
+
+    raise load_error
   end
 
   private :require
   private :gem_original_require
 
-end
+end unless Kernel.private_method_defined?(:gem_original_require)