class Jeweler::Commands::BuildGem

def run
  gemspec = gemspec_helper.parse
  gem_file_name = Gem::Builder.new(gemspec).build
  pkg_dir = File.join(base_dir, 'pkg')
  file_utils.mkdir_p pkg_dir
  gem_file_name = File.join(base_dir, gem_file_name)
  file_utils.mv gem_file_name, pkg_dir
end