rar2zip

#!/usr/bin/ruby
# -*- mode: ruby; encoding: utf-8-unix -*-

require 'tmpdir'

origdir = Dir::pwd

target = File.expand_path(ARGV[0])
dir  = File::dirname(target)
rar  = File::basename(target)

if /\.rar$/ === rar
  basename = $`
  zip = "#{basename}.zip"
else
  STDERR.puts "#{rar} is not RAR file."
  exit
end

workdir = File.join(Dir.tmpdir, basename)
Dir::mkdir(workdir)
Dir::chdir(workdir)
`unrar x "#{target}"`
`zip -r "#{zip}" ./`
`mv "#{File.join(workdir, zip)}" "#{dir}"`
Dir::chdir(origdir)
`rm -rf "#{workdir}"`