Disconnect defined options from the build object

Library/Homebrew/build_options.rb

@@ -1,7 +1,5 @@
 require 'options'
 
-# This class holds the build-time options defined for a Formula,
-# and provides named access to those options during install.
 class BuildOptions
   include Enumerable
 

Library/Homebrew/cmd/info.rb

@@ -127,7 +127,7 @@ module Homebrew
       end
     end
 
-    unless f.build.empty?
+    unless f.options.empty?
       ohai "Options"
       Homebrew.dump_options_for_formula f
     end

Library/Homebrew/cmd/options.rb

@@ -14,9 +14,9 @@ module Homebrew
 
   def puts_options(formulae)
     formulae.each do |f|
-      next if f.build.empty?
+      next if f.options.empty?
       if ARGV.include? '--compact'
-        puts f.build.as_flags.sort * " "
+        puts f.options.as_flags.sort * " "
       else
         puts f.name if formulae.length > 1
         dump_options_for_formula f
@@ -26,7 +26,7 @@ module Homebrew
   end
 
   def dump_options_for_formula f
-    f.build.sort_by(&:flag).each do |opt|
+    f.options.sort_by(&:flag).each do |opt|
       puts "#{opt.flag}\n\t#{opt.description}"
     end
     puts "--devel\n\tinstall development version #{f.devel.version}" if f.devel

Library/Homebrew/formula.rb

@@ -101,6 +101,10 @@ class Formula
     active_spec.patches
   end
 
+  def options
+    active_spec.options
+  end
+
   def option_defined?(name)
     active_spec.option_defined?(name)
   end
@@ -440,7 +444,7 @@ class Formula
       "caveats" => caveats
     }
 
-    hsh["options"] = build.map { |opt|
+    hsh["options"] = options.map { |opt|
       { "option" => opt.flag, "description" => opt.description }
     }
 

Library/Homebrew/formula_installer.rb

@@ -461,7 +461,7 @@ class FormulaInstaller
     when f.devel then args << "--devel"
     end
 
-    f.build.each do |opt, _|
+    f.options.each do |opt, _|
       name  = opt.name[/\A(.+)=\z$/, 1]
       value = ARGV.value(name)
       args << "--#{name}=#{value}" if name && value

Library/Homebrew/tab.rb

@@ -71,7 +71,7 @@ class Tab < OpenStruct
 
   def self.dummy_tab f=nil
     Tab.new :used_options => [],
-            :unused_options => (f.build.as_flags rescue []),
+            :unused_options => (f.options.as_flags rescue []),
             :built_as_bottle => false,
             :poured_from_bottle => false,
             :tapped_from => "",