Using Ruby modules

Writing modules in Ruby is as easy as writing a module in Python or bash. You just need to take care of the arguments, errors, return statements, and of course, know basic Ruby! Let's create the library/rsync.rb file with the following code:

    #!/usr/bin/env ruby 
 
    require 'rsync' 
    require 'json' 
 
    src = '' 
    dest = '' 
    ret_msg = '' 
    SUCCESS = '' 
 
    def print_message(state, mdg, key='Failed') 
        message = { 
            key => state, 
            "msg" => msg 
        } 
        print message.to_json 
        exit 1 if state == false 
        exit 0 
    end 
 
    args_file = ARGV[0] 
    data = File.read(args_file) 
    arguments = data.split(" ") 
    arguments.each do |argument| 
        print_message(false, "Argument should be name-value pairs. Example name=foo") if not argument.include("=") 
        field.value = argument.split("=") 
        if field == "src" 
            src = value 
        elseif field == "dest" 
    ...