EPUB dirs re-zipping (iBooks → Nook)

epub_zip.rb

#! /usr/bin/env ruby
require 'fileutils'
require 'shellwords'

dir = File.absolute_path ARGV[0]
results = "#{dir}/results"

Dir.mkdir(results) unless File.exist?(results)

puts "Working on: #{dir}"
puts "Collecting results in: #{dir}/#{results}"

Dir.glob("#{dir}/*.epub").each do |dir_path|
  if File.directory?(dir_path)
    filename = File.basename(dir_path)
    escaped_filename = Shellwords.escape(filename)
    FileUtils.cd(dir_path, :verbose => true)
    puts "    zip -X #{escaped_filename} mimetype"
    system "zip -X #{escaped_filename} mimetype"

    puts "    zip -rg #{escaped_filename} META-INF -x \*.DS_Store"  if File.exist? 'META-INF'
    system "zip -rg #{escaped_filename} META-INF -x \*.DS_Store"  if File.exist? 'META-INF'

    puts "    zip -rg #{escaped_filename} OEBPS -x \*.DS_Store" if File.exist? 'OEBS'
    system "zip -rg #{escaped_filename} OEBPS -x \*.DS_Store" if File.exist? 'OEBS'

    puts "    zip -rg #{escaped_filename} . -x \*.DS_Store"
    system "zip -rg #{escaped_filename} . -x \*.DS_Store"

    puts "    Move '#{filename}' to the '../results/#{filename}'"
    FileUtils.mv(filename, "../results/#{filename}")

    # Optional original dir deletion
    # puts "rm -rf #{dir_path}"
    # FileUtils.rm_rf(dir_path)

    FileUtils.cd('..', :verbose => true)
  end
end