From fa8b702c0d1d910ea8ee39f61a31bb1bee66aeef Mon Sep 17 00:00:00 2001
From: Vlad Shablinsky <vladshablinsky@gmail.com>
Date: Sun, 9 Aug 2015 14:57:15 +0300
Subject: [PATCH] uninstall: change logic to handle renames

---
 Library/Homebrew/cmd/uninstall.rb | 40 +++++++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/cmd/uninstall.rb b/Library/Homebrew/cmd/uninstall.rb
index ab2938c759..5987cae096 100644
--- a/Library/Homebrew/cmd/uninstall.rb
+++ b/Library/Homebrew/cmd/uninstall.rb
@@ -1,30 +1,66 @@
 require "keg"
 require "formula"
+require "migrator"
 
 module Homebrew
   def uninstall
     raise KegUnspecifiedError if ARGV.named.empty?
 
+    # Find symlinks that can point to keg.rack
+    links = HOMEBREW_CELLAR.subdirs.select(&:symlink?)
+
     if !ARGV.force?
       ARGV.kegs.each do |keg|
         keg.lock do
           puts "Uninstalling #{keg}... (#{keg.abv})"
+
+          old_cellars = []
+          # Remove every symlink that links to keg, because it can
+          # be left by migrator
+          links.each do |link|
+            old_opt = HOMEBREW_PREFIX/"opt/#{link.basename}"
+            if link.exist? && link.realpath == keg.rack.realpath
+              old_cellars << link
+            end
+
+            if old_opt.symlink? && old_opt.realpath.to_s == keg.to_s
+              old_opt.unlink
+              old_opt.parent.rmdir_if_possible
+            end
+          end
+
           keg.unlink
           keg.uninstall
           rack = keg.rack
           rm_pin rack
+
           if rack.directory?
             versions = rack.subdirs.map(&:basename)
             verb = versions.length == 1 ? "is" : "are"
             puts "#{keg.name} #{versions.join(", ")} #{verb} still installed."
             puts "Remove them all with `brew uninstall --force #{keg.name}`."
+          else
+            # If we delete Cellar/newname, then Cellar/oldname symlink
+            # can become broken and we have to remove it.
+            old_cellars.each(&:unlink)
           end
         end
       end
     else
       ARGV.named.each do |name|
-        name = Formulary.canonical_name(name)
-        rack = HOMEBREW_CELLAR/name
+        rack = Formulary.to_rack(name)
+        name = rack.basename
+
+        links.each do |link|
+          old_opt = HOMEBREW_PREFIX/"opt/#{link.basename}"
+          if old_opt.symlink? && old_opt.exist? \
+              && old_opt.realpath.parent == rack.realpath
+            old_opt.unlink
+            old_opt.parent.rmdir_if_possible
+          end
+
+          lnk.unlink if lnk.exist? && lnk.realpath == rack.realpath
+        end
 
         if rack.directory?
           puts "Uninstalling #{name}... (#{rack.abv})"