I am looking for a code review on this class. I found myself writing this logic a lot, so trying to save myself some time.require 'etc'require 'net/ssh'require 'net/scp'class SSHOps  def initialize(host, user=Etc.getlogin, *args)    @host = host    @user = user    @keys = args.empty?  \    ? args << Etc.getpwnam(Etc.getlogin).dir + '/.ssh/id_rsa' \    : args  end  ##  # Download a file over SCP.  #  # ==== Attributes  #  # * +hostname+ - Target hostname to download the file from.  # * +filename+ - Filename to download.  def download_file(remote_path, local_path)    ssh = Net::SSH.start(@host, @user, :keys => @keys)    ssh.scp.download(remote_path, local_path, :preserve => true)    ssh.close  endend
SSH Class with a method for downloading via SCP
ruby;ssh
Some comments:def initialize(host, user=Etc.getlogin, *args). Ugly signature. I'd write def initialize(host, options = {})I had never seen that multiline way of writing a conditional. It does not look too good...Use File::join instead of joining paths by hand.The arguments in the documentation are wrong.args << Etc.getpwnam(Etc.getlogin).dir + '/.ssh/id_rsa'. It's not considered good practice to update an argument.I'd write:require 'etc'require 'net/ssh'require 'net/scp'class SSHOps  def initialize(host, options = {})    @host = host    @user = options[:user] || Etc.getlogin    id_rsa_path = File.join(Etc.getpwnam(@user).dir, .ssh/id_rsa)    @keys = options[:keys].empty? ? [id_rsa_path] : options[:keys]  end  def download_file(remote_path, local_path)    ssh = Net::SSH.start(@host, @user, :keys => @keys)    ssh.scp.download(remote_path, local_path, :preserve => true)    ssh.close  endendNote that the library active_support has a nice abstraction for the pattern @keys = options[:keys].empty? ? [id_rsa_path] : options[:keys]: @keys = options[:keys].presence || [id_rsa_path]. 