Rails 2.3.3.1

Update to latest Rails.
A little bit of jiggery-pokery is involved, since they
neglected to re-include vendored Rack in this release.

vendor/rails/railties/lib/rails/gem_dependency.rb

@@ -29,6 +29,22 @@ module Rails
       end
     end
 
+    def self.from_directory_name(directory_name, load_spec=true)
+      directory_name_parts = File.basename(directory_name).split('-')
+      name    = directory_name_parts[0..-2].join('-')
+      version = directory_name_parts.last
+      result = self.new(name, :version => version)
+      spec_filename = File.join(directory_name, '.specification')
+      if load_spec
+        raise "Missing specification file in #{File.dirname(spec_filename)}. Perhaps you need to do a 'rake gems:refresh_specs'?" unless File.exists?(spec_filename)
+        spec = YAML::load_file(spec_filename)
+        result.specification = spec
+      end
+      result
+    rescue ArgumentError => e
+      raise "Unable to determine gem name and version from '#{directory_name}'"
+    end
+
     def initialize(name, options = {})
       require 'rubygems' unless Object.const_defined?(:Gem)
 
@@ -95,14 +111,26 @@ module Rails
       end
     end
 
+    def specification=(s)
+      @spec = s
+    end
+
     def requirement
       r = version_requirements
       (r == Gem::Requirement.default) ? nil : r
     end
 
     def built?
-      # TODO: If Rubygems ever gives us a way to detect this, we should use it
-      false
+      return false unless frozen?
+
+      if vendor_gem?
+        specification.extensions.each do |ext|
+          makefile = File.join(unpacked_gem_directory, File.dirname(ext), 'Makefile')
+          return false unless File.exists?(makefile)
+        end
+      end
+
+      true
     end
 
     def framework_gem?
@@ -155,15 +183,16 @@ module Rails
       specification && File.exists?(unpacked_gem_directory)
     end
 
-    def build
+    def build(options={})
       require 'rails/gem_builder'
-      unless built?
+      return if specification.nil?
+      if options[:force] || !built?
         return unless File.exists?(unpacked_specification_filename)
         spec = YAML::load_file(unpacked_specification_filename)
         Rails::GemBuilder.new(spec, unpacked_gem_directory).build_extensions
         puts "Built gem: '#{unpacked_gem_directory}'"
       end
-      dependencies.each { |dep| dep.build }
+      dependencies.each { |dep| dep.build(options) }
     end
 
     def install
@@ -223,7 +252,7 @@ module Rails
         real_spec = Gem::Specification.load(specification.loaded_from)
         write_specification(real_spec)
       end
-      dependencies.each { |dep| dep.unpack } if options[:recursive]
+      dependencies.each { |dep| dep.unpack(options) } if options[:recursive]
     end
 
     def write_specification(spec)