Add Go language module, resources

This introduces a new GoResource category of resource. GoResources
have a specialized stage method which allows a resource to stage
itself into a gopath.

The new Go language module provides a one-liner to stage all
GoResources present in the formula.

1 files changed, 2 insertions, 2 deletions

diff --git a/Library/Homebrew/software_spec.rb b/Library/Homebrew/software_spec.rb
index 3dbcc0cc5..b2071e119 100644
--- a/Library/Homebrew/software_spec.rb
+++ b/Library/Homebrew/software_spec.rb
@@ -69,10 +69,10 @@ class SoftwareSpec
     resources.has_key?(name)
   end
 
-  def resource name, &block
+  def resource name, klass=Resource, &block
     if block_given?
       raise DuplicateResourceError.new(name) if resource_defined?(name)
-      res = Resource.new(name, &block)
+      res = klass.new(name, &block)
       resources[name] = res
       dependency_collector.add(res)
     else