1 files changed, 4 insertions, 8 deletions
diff --git a/tool/vcs.rb b/tool/vcs.rb
index 4d8936cb54..0f20c6e35a 100644
--- a/tool/vcs.rb
+++ b/tool/vcs.rb
@@ -73,15 +73,11 @@ class VCS
 
   def self.detect(path)
     @@dirs.each do |dir, klass, pred|
-      if pred ? pred[path, dir] : File.directory?(File.join(path, dir))
-        return klass.new(path)
-      end
-      prev = path
+      curr = path
       loop {
-        curr = File.realpath(File.join(prev, '..'))
-        break if curr == prev	# stop at the root directory
-        return klass.new(path) if File.directory?(File.join(curr, dir))
-        prev = curr
+        return klass.new(curr) if pred ? pred[curr, dir] : File.directory?(File.join(curr, dir))
+        prev, curr = curr, File.realpath(File.join(curr, '..'))
+        break if curr == prev # stop at the root directory
       }
     end
     raise VCS::NotFoundError, "does not seem to be under a vcs: #{path}"