Gem::Commands::PushCommand#load_attestation

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/commands/push_command.rb, line 210
def load_attestation(file)
  data = begin
    Gem.read_binary(file)
  rescue SystemCallError, IOError, ArgumentError => e
    raise Gem::Exception, "Failed to read attestation #{file}: #{e.message}"
  end
  validate_attestation_json(data, file)
end