# File lib/googleauth/credentials_loader.rb, line 173
      def load_gcloud_project_id
        gcloud = GCLOUD_WINDOWS_COMMAND if OS.windows?
        gcloud = GCLOUD_POSIX_COMMAND unless OS.windows?
        gcloud_json = IO.popen("#{gcloud} #{GCLOUD_CONFIG_COMMAND}", &:read)
        config = MultiJson.load gcloud_json
        config["configuration"]["properties"]["core"]["project"]
      rescue StandardError
        nil
      end