class Thor::PackageTask

def initialize(gemspec, opts = {})
  super(:package, "build a gem package")
  @spec = gemspec
  @opts = {:dir => File.join(Dir.pwd, "pkg")}.merge(opts)
end

def run
  FileUtils.mkdir_p(@opts[:dir])
  Gem::Builder.new(spec).build
  FileUtils.mv(spec.file_name, File.join(@opts[:dir], spec.file_name))
end