module Bundler

def load_gemspec(file)
  path = Pathname.new(file)
  # Eval the gemspec from its parent directory
  Dir.chdir(path.dirname.to_s) do
    contents = File.read(path.basename.to_s)
    begin
      Gem::Specification.from_yaml(contents)
      # Raises ArgumentError if the file is not valid YAML
    rescue ArgumentError, SyntaxError, Gem::EndOfYAMLException, Gem::Exception
      begin
        eval(contents, TOPLEVEL_BINDING, path.expand_path.to_s)
      rescue LoadError => e
        original_line = e.backtrace.find { |line| line.include?(path.to_s) }
        msg  = "There was a LoadError while evaluating #{path.basename}:\n  #{e.message}"
        msg << " from\n  #{original_line}" if original_line
        msg << "\n"
        if RUBY_VERSION >= "1.9.0"
          msg << "\nDoes it try to require a relative path? That doesn't work in Ruby 1.9."
        end
        raise GemspecError, msg
      end
    end
  end
end