Delete empty directories recursively

purge_empties.rb

#!/usr/bin/env ruby
#
# Delete empty directories recursively
#
# Author::    Soon Van - randomecho.com
# Copyright:: Copyright 2016 Soon Van
# License::   http://opensource.org/licenses/BSD-3-Clause

require 'FileUtils'

@total_removed = 0

def purge_empties(path_to)
  Dir.foreach(path_to) do |dir|
    full_path = path_to + dir
    if dir[0,1] != '.' && File.directory?(full_path)
      if Dir.entries(full_path) == ['.', '..']
        FileUtils.rm_rf(full_path)
        puts "Deleted: #{full_path}"
        @total_removed += 1
      else
        purge_empties(full_path + "/")
      end
    end
  end

  return
end

#Gem.win_platform? ? (system "cls") : (system "clear")
if ARGV[0].nil?
  puts "! No folder specified."
  puts "Use the following format: \n\n"
  puts "$ #{File.basename(__FILE__)} /path/to"
  exit
else
  purge_empties(ARGV[0])

  if @total_removed > 0
    puts "Total removed: #{@total_removed}"
  end
end