update: remove unused rename detection

Right now this code only produces false positives. When we have real
support for renames, we can implement it more carefully.

Closes Homebrew/homebrew#31126.

1 files changed, 2 insertions, 7 deletions

diff --git a/Library/Homebrew/cmd/update.rb b/Library/Homebrew/cmd/update.rb
index 5fe9341af..5addb4375 100644
--- a/Library/Homebrew/cmd/update.rb
+++ b/Library/Homebrew/cmd/update.rb
@@ -172,12 +172,8 @@ class Updater
     map = Hash.new{ |h,k| h[k] = [] }
 
     if initial_revision && initial_revision != current_revision
-      `git diff-tree -r --name-status -M85% #{initial_revision} #{current_revision}`.each_line do |line|
-        status, path, renamed = line.split
-        if renamed
-          status = status[0, 1]
-          path = renamed
-        end
+      `git diff-tree -r --name-status --diff-filter=AMD #{initial_revision} #{current_revision}`.each_line do |line|
+        status, path = line.split
         map[status.to_sym] << repository.join(path)
       end
     end
@@ -226,7 +222,6 @@ class Report
     dump_formula_report :A, "New Formulae"
     dump_formula_report :M, "Updated Formulae"
     dump_formula_report :D, "Deleted Formulae"
-    dump_formula_report :R, "Renamed Formulae"
   end
 
   def tapped_formula_for key