tab: remap deprecated options in tabs.

If a deprecated option is found in a tab, rename it to the new option.

Library/Homebrew/tab.rb

@@ -43,6 +43,16 @@ class Tab < OpenStruct
     for_formula(Formulary.factory(name))
   end
 
+  def self.remap_deprecated_options deprecated_options, options
+    deprecated_options.each do |deprecated_option|
+      option = options.find {|option| option.name == deprecated_option.old }
+      next unless option
+      options -= [option]
+      options << Option.new(deprecated_option.current, option.description)
+    end
+    options
+  end
+
   def self.for_formula f
     paths = []
 
@@ -63,7 +73,10 @@ class Tab < OpenStruct
     path = paths.map { |pn| pn.join(FILENAME) }.find(&:file?)
 
     if path
-      from_file(path)
+      tab = from_file(path)
+      used_options = remap_deprecated_options(f.deprecated_options, tab.used_options)
+      tab.used_options = used_options.as_flags
+      tab
     else
       dummy_tab(f)
     end

Library/Homebrew/test/test_tab.rb

@@ -90,6 +90,13 @@ class TabTests < Homebrew::TestCase
     assert_equal @tab.compiler, tab.compiler
     assert_equal @tab.stdlib, tab.stdlib
   end
+
+  def test_remap_deprecated_options
+    deprecated_options = [DeprecatedOption.new("with-foo", "with-foo-new")]
+    remapped_options = Tab.remap_deprecated_options(deprecated_options, @tab.used_options)
+    assert_includes remapped_options, Option.new("without-bar")
+    assert_includes remapped_options, Option.new("with-foo-new")
+  end
 end
 
 class TabLoadingTests < Homebrew::TestCase