Ask for password in ruby command line and do not show characters. And generate salt. Works in rake task.

ask_password.rb

salt = SecureRandom.base64
puts "Generated salt: #{salt} (only for information)"
passw = ''
puts 'Enter password: '
$stdin.noecho do
  passw = $stdin.gets.strip
end
if passw.blank? || passw.length < 6
  puts 'Password cannot be empty or shorter than 6 characters'
  exit
end