zip_files.rb

require 'zip/zip'

# zip files
Dir.chdir(parent_directory)
zipfile = directory + ".zip"
return false if File.exist?(zipfile)
Zip::ZipFile::open(zipfile, true) do |zf|
  Dir["#{directory}/**/*"].each { |f| zf.add(f, f) }
  zf.close
end

# unzip files
begin
  Zip::ZipFile::open(zipfile) do |zf| 
     zf.each do |e| 
       fpath = File.join(local_directory, e.name) 
       FileUtils.mkdir_p(File.dirname(fpath)) 
       zf.extract(e, fpath) 
     end
  end
rescue Zip::ZipDestinationFileExistsError => e
  #?
end