From 4daf0de435d1b5ed07db5165663e4eb60af648e2 Mon Sep 17 00:00:00 2001
From: Adam Vandenberg <flangy@gmail.com>
Date: Sun, 14 Apr 2013 09:35:16 -0700
Subject: [PATCH] Only prune taps if taps exist.

Closes Homebrew/homebrew#19192.
---
 Library/Homebrew/cmd/tap.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Library/Homebrew/cmd/tap.rb b/Library/Homebrew/cmd/tap.rb
index 52e03ca17d..23bef96d28 100644
--- a/Library/Homebrew/cmd/tap.rb
+++ b/Library/Homebrew/cmd/tap.rb
@@ -88,6 +88,8 @@ module Homebrew extend self
     end
     puts "Pruned #{count} dead formula"
 
+    return unless HOMEBREW_REPOSITORY.join("Library/Taps").exist?
+
     count = 0
     # check symlinks are all set in each tap
     HOMEBREW_REPOSITORY.join("Library/Taps").children.each do |tap|