From abf6b6f6cf31277ec1350fc7f7d16a7d23de882a Mon Sep 17 00:00:00 2001
From: Vlad Shablinsky <vladshablinsky@gmail.com>
Date: Sun, 9 Aug 2015 15:01:56 +0300
Subject: [PATCH] add migrate command for migrating renamed

---
 Library/Homebrew/cmd/migrate.rb | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Library/Homebrew/cmd/migrate.rb

diff --git a/Library/Homebrew/cmd/migrate.rb b/Library/Homebrew/cmd/migrate.rb
new file mode 100644
index 0000000000..97f21f78ce
--- /dev/null
+++ b/Library/Homebrew/cmd/migrate.rb
@@ -0,0 +1,20 @@
+require "migrator"
+require "formula_renames"
+
+module Homebrew
+  def migrate
+    raise FormulaUnspecifiedError if ARGV.named.empty?
+
+    ARGV.resolved_formulae.each do |f|
+      if f.oldname
+        unless (rack = HOMEBREW_CELLAR/f.oldname).exist? && !rack.subdirs.empty?
+          raise NoSuchKegError, f.oldname
+        end
+        raise "#{rack} is a symlink" if rack.symlink?
+      end
+
+      migrator = Migrator.new(f)
+      migrator.migrate
+    end
+  end
+end