Recursively traverse and unpack all .rar files

unpack.rb

#!/usr/bin/env ruby

require 'fileutils'

module FileUtils
  
  def self.move_to_trash(file)
    
    dest = File.join(File.expand_path('~/.Trash/'), File.basename(file))
    
    if File.exist?(dest)
      dest = File.join(File.expand_path('~/.Trash/'), File.basename(file) + " #{rand(76938476)}")
    end
    
    mv(file, dest)
  end
  
end

def unpack_folder(folder)
  
  ignore_extentions = [".rb", ".nfo", ""]
  files_before_extracting = Dir.glob(File.join(folder, "*"))

  rar_files = files_before_extracting.select { |x| x.end_with? ".rar" }

  if rar_files.length > 0
    rar_file = rar_files.first
    puts "unpacking #{File.basename(rar_file)}"
    command = "cd \"#{folder}\" && unrar e \"#{File.absolute_path(rar_file)}\" &> /dev/null"
    result = system(command)

    unless result
      abort "Unpacking failed."
    end

    system("growlnotify -a Terminal.app -t \"Unpacking complete\" -m \"#{File.basename(rar_file)}\"")
    files_after_extracting = Dir.glob(File.join(folder, "*"))

    new_files = files_after_extracting - files_before_extracting

    files_to_delete = (files_after_extracting - new_files).reject { |x| ignore_extentions.include? File.extname(x) }.reject { |x| File.directory? x }

    files_to_delete.each do |file|
      FileUtils.move_to_trash(file)
    end
  end

  sample_dir = File.join(folder, "Sample")
  FileUtils.move_to_trash(sample_dir) if File.exist?(sample_dir)
end

def traverse_folder(folder)
  Dir.new(folder).each do |file|
    
    next if ['.', '..'].include?(file)
    
    file = File.join(folder, file)
    
    if (File.directory?(file))
      traverse_folder(file)
    end
    
  end
  process_folder(folder)
end

def process_folder(folder)
  unpack_folder(folder)
end


traverse_folder(Dir.pwd)