From b7847e4657a84e80d97ce1582658058eca91cdbf Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Sat, 25 Aug 2018 21:57:16 +0200
Subject: [PATCH] =?UTF-8?q?Don=E2=80=99t=20migrate=20symlinks.?=
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---
 Library/Homebrew/update_migrator/cache_entries_to_symlinks.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Library/Homebrew/update_migrator/cache_entries_to_symlinks.rb b/Library/Homebrew/update_migrator/cache_entries_to_symlinks.rb
index 371a2ce542..6b8df568d3 100644
--- a/Library/Homebrew/update_migrator/cache_entries_to_symlinks.rb
+++ b/Library/Homebrew/update_migrator/cache_entries_to_symlinks.rb
@@ -29,6 +29,7 @@ module UpdateMigrator
 
     formula_downloaders = if HOMEBREW_CACHE.directory?
       HOMEBREW_CACHE.children
+                    .reject(&:symlink?)
                     .select(&:file?)
                     .map { |child| child.basename.to_s.sub(/\-\-.*/, "") }
                     .uniq
@@ -42,6 +43,8 @@ module UpdateMigrator
 
     cask_downloaders = if (HOMEBREW_CACHE/"Cask").directory?
       (HOMEBREW_CACHE/"Cask").children
+                             .reject(&:symlink?)
+                             .select(&:file?)
                              .map { |child| child.basename.to_s.sub(/\-\-.*/, "") }
                              .uniq
                              .map(&load_cask)