tar wrapper script for windows using 7zip

tar.cmd

@call ruby r:\tar.rb %*

tar.rb

params = ARGV.shift
dest = ARGV.shift
orig = ARGV.shift

if params && params.split(//).sort.join == 'cfz'
  if dest && orig
    if dest =~ /(.*)\.tar\.gz$/
      #FIXME: Check errorlevel after the first execution
      system "7z a -y -ttar #{$1}.tar #{orig}"    
      system "7z a -y -tgzip #{$1}.tar.gz #{$1}.tar"
    else
      puts "This only works when the dest file has a .tar.gz extension."
    end
  else
    puts "dest && orign should be specified."
  end
else
  puts "Only 'czf' parameter is supported"
end