From 5dfa0cf622bbaae4fc3f7ebfd4d90c19c684a9a5 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Sun, 1 Apr 2018 09:27:49 +0100
Subject: [PATCH] keg: delete bad tap opt non-symlink directories.

But don't delete them if they are a symlink to a directory i.e. a normal
opt link.

Handles the issue mentioned in
https://github.com/Homebrew/brew/commit/1651647a3dc9dbc03ed3c5da06090228db4cd1a0#r28360427
---
 Library/Homebrew/keg.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index 04c98c9556..d40be299c1 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -238,7 +238,9 @@ class Keg
 
     if tap
       bad_tap_opt = opt/tap.user
-      FileUtils.rm_rf bad_tap_opt if bad_tap_opt.directory?
+      if !bad_tap_opt.symlink? && bad_tap_opt.directory?
+        FileUtils.rm_rf bad_tap_opt
+      end
     end
 
     aliases.each do |a|