module RSpec::Core::RubyProject

def ascend_until
  fs = File::SEPARATOR
  escaped_slash = "\\#{fs}"
  special = "_RSPEC_ESCAPED_SLASH_"
  project_path = File.expand_path(".")
  parts = project_path.gsub(escaped_slash, special).squeeze(fs).split(fs).map do |x|
    x.gsub(special, escaped_slash)
  end
  until parts.empty?
    path = parts.join(fs)
    path = fs if path == ""
    return path if yield(path)
    parts.pop
  end
end