Thor FTP deploy task

task.thor

desc "deploy", "deploys the site via LFTP to the location specified in the environment"
def deploy
  load_ftp_configuration

  start_timestamp = Time.now.to_i

  if system("lftp -e 'mirror -R -v #{ENV['PUBLIC_DIRECTORY']} #{ENV['FTP_TARGET_DIRECTORY']}; bye' -u #{ENV['FTP_USER']},#{ENV['FTP_PASSWORD']} #{ENV['FTP_SERVER']}")
    puts "Deploy finished. (Duration: #{Time.now.to_i - start_timestamp} seconds)"
  else
    puts 'Deploy aborted, something went wrong.'
  end
end

private
def load_ftp_configuration
  configuration_file = "ftp_configuration.yml"

  if File.exists? configuration_file
    configuration_hash = YAML.load_file configuration_file
    configuration_hash.each do |key, value|
        ENV[key.upcase] = value
    end
  else
    throw 'Missing `ftp_configuration.yml` to specify ftp configuration variables.'
  end
end