Fix hanna rubygems integration, you can install this version of hanna…

…, then just do `gem rdoc --all` to get all hanna'd rdocs!

lib/hanna.rb

@@ -1 +1,2 @@
+module Hanna; end
 require 'hanna/hanna'

lib/hanna/hanna.rb

@@ -9,7 +9,7 @@
 require 'sass'
 require 'rdoc/rdoc'
 require 'rdoc/generator'
-require 'hanna/version' unless ::Hanna # meh
+require 'hanna/version'
 
 class RDoc::Generator::Hanna 
   STYLE            = 'styles.sass'

lib/rubygems_plugin.rb

@@ -1,28 +1,8 @@
-unless defined?(::Hanna) or defined?(::RDoc)
-  require 'rubygems/doc_manager'
-  require 'rubygems/requirement'
+# TODO  for rubygems 1.3.8, should get Gem.register_plugin(:documtnation,
+# 'hanna/rubygems').
+# TODO  some way of making this optional.
 
-  # define the Hanna namespace to prevent actions of rubygems_plugin from older versions
-  module ::Hanna; end
+# Could use Gem.pre_install hooks, but that'd not work for `gem rdoc --all`.
 
-  class << Gem::DocManager
-    alias load_rdoc_without_version_constraint load_rdoc
-
-    # overwrite load_rdoc to load the exact version of RDoc that Hanna works with
-    def load_rdoc
-      unless defined? ::Hanna::VERSION
-        load File.expand_path(File.join(File.dirname(__FILE__), 'hanna', 'version.rb'))
-      end
-
-      Hanna::require_rdoc(false) # don't terminate if failed
-
-      # call the original method
-      load_rdoc_without_version_constraint
-      requirement = Gem::Requirement.create Hanna::RDOC_VERSION_REQUIREMENT
-
-      unless requirement.satisfied_by? rdoc_version
-        raise Gem::DocumentError, "ERROR: RDoc version #{requirement} not installed"
-      end
-    end
-  end
-end
+require 'rubygems/doc_manager'
+Gem::DocManager.configured_args << '-f' << 'hanna'