cmd/update: check before tapping

Follow-up to ea6c8f7e2dc8f1adf8df9065468d0b37047d4a46
2015-11-09 07:30:02 -08:00 · 2015-11-09 07:30:02 -08:00 · 745ec8f7c9
commit 745ec8f7c9
parent 95bbd8ef02
1 changed files with 2 additions and 1 deletions
--- a/Library/Homebrew/cmd/update.rb
+++ b/Library/Homebrew/cmd/update.rb
@ -83,7 +83,8 @@ module Homebrew
      migration = TAP_MIGRATIONS[f]
      next unless migration
      tap = Tap.fetch(*migration.split("/"))
-      tap.install
+      tap.install unless tap.installed?
+
      # update tap for each Tab
      tabs = dir.subdirs.map { |d| Tab.for_keg(Keg.new(d)) }
      next if tabs.first.source["tap"] != "Homebrew/homebrew"