From 16049840dc16f9b63af0aac2a52274611f8e8cf7 Mon Sep 17 00:00:00 2001
From: Bo Anderson <mail@boanderson.me>
Date: Thu, 9 Jul 2020 15:06:15 +0100
Subject: [PATCH] formula_installer: mv rather than rename on link_overwrite

Fixes a cross-device link error if the two locations are on separate partitions.
---
 Library/Homebrew/formula_installer.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index c6a7318e6c..f6a251b209 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -857,7 +857,7 @@ class FormulaInstaller
       if formula.link_overwrite?(conflict_file) && !link_overwrite_backup.key?(conflict_file)
         backup_file = backup_dir/conflict_file.relative_path_from(HOMEBREW_PREFIX).to_s
         backup_file.parent.mkpath
-        conflict_file.rename backup_file
+        FileUtils.mv conflict_file, backup_file
         link_overwrite_backup[conflict_file] = backup_file
         retry
       end
@@ -889,7 +889,7 @@ class FormulaInstaller
         keg.unlink
         link_overwrite_backup.each do |origin, backup|
           origin.parent.mkpath
-          backup.rename origin
+          FileUtils.mv backup, origin
         end
       end
       Homebrew.failed = true