$NetBSD: patch-am,v 1.1.1.1 2010/09/12 03:50:06 taca Exp $

Prevent access to HOME when --install-root is used.

--- lib/rubygems/doc_manager.rb.orig	2010-04-22 08:24:42.000000000 +0000
+++ lib/rubygems/doc_manager.rb
@@ -61,7 +61,7 @@ class Gem::DocManager
   ##
   # Updates the RI cache for RDoc 2 if it is installed
 
-  def self.update_ri_cache
+  def self.update_ri_cache(install_root = nil)
     load_rdoc rescue return
 
     return unless defined? RDoc::VERSION # RDoc 1 does not have VERSION
@@ -72,7 +72,7 @@ class Gem::DocManager
       :use_cache => true,
       :use_system => true,
       :use_site => true,
-      :use_home => true,
+      :use_home => (install_root == nil)? true: false,
       :use_gems => true,
       :formatter => RDoc::RI::Formatter,
     }
