Common tasks in my linux

common.thor

class Common < Thor
  desc "passgen [LENGTH]", "generates passwords with a given length (defaults to 8)"
  method_options :numeric => :boolean, :downcase => :boolean, :upcase => :boolean, :alphanumeric => :boolean
  def passgen(len = 8)
    chars = []
    if (options.empty?)
      chars = ("a".."z").to_a + ("A".."Z").to_a + ("0".."9").to_a
    else
      if options[:alphanumeric]
        chars += ("a".."z").to_a + ("A".."Z").to_a
      else
        chars += ("a".."z").to_a if options[:downcase]
        chars += ("A".."Z").to_a if options[:upcase]
      end
      chars += ("0".."9").to_a if options[:numeric]
    end

    newpass = ""
    1.upto(len.to_i) { |i| newpass << chars[rand(chars.size-1)] }
    puts newpass
  end

end