class Gem::RequestSet::GemDependencyAPI

def find_gemspec(name, path) # :nodoc:
  glob = File.join path, "#{name}.gemspec"
  spec_files = Dir[glob]
  case spec_files.length
  when 1 then
    spec_file = spec_files.first
    spec = Gem::Specification.load spec_file
    return spec if spec
    raise ArgumentError, "invalid gemspec #{spec_file}"
  when 0 then
    raise ArgumentError, "no gemspecs found at #{Dir.pwd}"
  else
    raise ArgumentError,
      "found multiple gemspecs at #{Dir.pwd}, " \
      "use the name: option to specify the one you want"
  end
end