class Git::Lib

def archive(sha, file = nil, opts = {})
  opts[:format] ||= 'zip'
  
  if opts[:format] == 'tgz'
    opts[:format] = 'tar' 
    opts[:add_gzip] = true
  end
  
  file ||= Tempfile.new('archive').path
  
  arr_opts = []
  arr_opts << "--format=#{opts[:format]}" if opts[:format]
  arr_opts << "--prefix=#{opts[:prefix]}" if opts[:prefix]
  arr_opts << "--remote=#{opts[:remote]}" if opts[:remote]
  arr_opts << sha
  arr_opts << '--' << opts[:path] if opts[:path]
  command('archive', arr_opts, true, (opts[:add_gzip] ? '| gzip' : '') + " > #{escape file}")
  return file
end