ITMAT Archive Lib

#!/usr/bin/env ruby

class ItmatArchive
  
  def self.compress(dir, comp_file)
    system("tar -czf #{comp_file} #{dir}")
    system("split -b 20m -a 3 #{comp_file} #{dir}.")
    system("rm -rf #{comp_file}")
  end
  
  def self.decompress_all(work_dir, split_file_prefix)
    system("cat #{split_file_prefix}.a* >> #{work_dir}/#{split_file_prefix}.tar.gz")
    system("rm -rf #{split_file_prefix}.a*")
    curdir = Dir.getwd
    Dir.chdir(work_dir)
    restore_dir = "restore-" + Time.now.to_i.to_s
    system("mkdir #{work_dir}/#{restore_dir}")
    system("tar -C #{restore_dir} -zxf #{split_file_prefix}.tar.gz")
    system("rm -rf #{split_file_prefix}.tar.gz")
    Dir.chdir(curdir)
    puts "All files successfully restored under #{work_dir}/#{restore_dir}/#{split_file_prefix}"
  end
  
  def self.decompress_file(work_dir, split_file_prefix, file_name)
    system("cat #{split_file_prefix}.a* >> #{work_dir}/#{split_file_prefix}.tar.gz")
    system("rm -rf #{split_file_prefix}.a*")
    curdir = Dir.getwd
    Dir.chdir(work_dir)
    restore_dir = "restore-" + Time.now.to_i.to_s
    system("mkdir #{work_dir}/#{restore_dir}")
    system("tar --include #{file_name} -C #{restore_dir} -zxf #{split_file_prefix}.tar.gz")
    system("rm -rf #{split_file_prefix}.tar.gz")
    Dir.chdir(curdir)
    puts "#{file_name} was successfully restored under #{work_dir}/#{restore_dir}/#{split_file_prefix}"
  end
  
  comp_dir = "Pictures"
  ItmatArchive.compress(comp_dir, comp_dir + ".tar.gz")
  #ItmatArchive.decompress_all("/tmp", comp_dir)
  #ItmatArchive.decompress_file("/tmp", comp_dir, "*.JPG")
  
end