From 0d74967ceb15fe954ca722c11de91326d072fa05 Mon Sep 17 00:00:00 2001
From: Xu Cheng <xucheng@me.com>
Date: Wed, 11 Nov 2015 14:14:58 +0800
Subject: [PATCH] Formula.racks: exclude empty rack

Fixes https://github.com/Homebrew/homebrew-bundle/issues/121

Closes Homebrew/homebrew#45879.

Signed-off-by: Xu Cheng <xucheng@me.com>
---
 Library/Homebrew/formula.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index d055ad5042..9543f3ad48 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -1052,7 +1052,9 @@ class Formula
   # @private
   def self.racks
     @racks ||= if HOMEBREW_CELLAR.directory?
-      HOMEBREW_CELLAR.subdirs.reject(&:symlink?)
+      HOMEBREW_CELLAR.subdirs.reject do |rack|
+        rack.symlink? || rack.subdirs.empty?
+      end
     else
       []
     end