add lwrp for brew tap

providers/tap.rb

@@ -0,0 +1,27 @@
+def load_current_resource
+  @tap = Chef::Resource::HomebrewTap.new(new_resource.name)
+  tap_dir = @tap.name.gsub('/', '-')
+
+  Chef::Log.debug("Checking whether we've already tapped #{new_resource.name}")
+  if ::File.directory?("/usr/local/Library/Taps/#{tap_dir}")
+    @tap.tapped true
+  else
+    @tap.tapped false
+  end
+end
+
+action :tap do
+  unless @tap.tapped
+    execute "tapping #{new_resource.name}" do
+      command "/usr/local/bin/brew tap #{new_resource.name}"
+    end
+  end
+end
+
+action :untap do
+  if @tap.tapped
+    execute "untapping #{new_resource.name}" do
+      command "/usr/local/bin/brew untap #{new_resource.name}"
+    end
+  end
+end

resources/tap.rb

@@ -0,0 +1,14 @@
+actions :tap, :untap
+attribute :name,
+  :name_attribute => true,
+  :kind_of        => String,
+  :regex          => /\w+(?:\/\w+)+/
+
+attribute :tapped,
+  :kind_of => [TrueClass, FalseClass]
+
+### hax for default action
+def initialize( *args )
+  super
+  @action = :tap
+end