Find the closest spec_helper.rb, in the _root_ dir or an ancestor.

find_closest_spec_helper.rb

root = '/Users/henrik/Sites/auktion/spec/models/auction'
p (root.scan('/').length+1).times { |i| unless (r = Dir["#{root}/#{'../'*i}spec_helper.rb"]).empty?; break(File.expand_path(r.first)); end }