def backup_failed_github_file(build_file, attempt)
      basename = File.basename(build_file, '.tar.gz')
      destination = File.join(Dir.tmpdir, basename,
                              ".gh.failure.#{attempt}.tar.gz")
      FileUtils.cp(build_file, destination)
      log.info("Copied #{build_file} to #{destination}")
    end
def backup_failed_github_file(build_file, attempt)
      basename = File.basename(build_file, '.tar.gz')
      destination = File.join(Dir.tmpdir, basename,
                              ".gh.failure.#{attempt}.tar.gz")
      FileUtils.cp(build_file, destination)
      log.info("Copied #{build_file} to #{destination}")
    end
Backs up the failed file from a github verification.

 @param build_file [String] The build file to backup.
 @param attempt [Integer] Which attempt to verify the file failed.