sha512sum="sha512sum"
  else
    sha512sum="shasum -a512"
  fi

  if [[ -z "${KUBE_VERSION-}" ]]; then
    find-release-tars
    upload-tars
  elif [[ ${KUBE_VERSION} =~ ${KUBE_RELEASE_VERSION_REGEX} ]]; then
    SERVER_BINARY_TAR_URL="https://dl.k8s.io/release/${KUBE_VERSION}/kubernetes-server-linux-amd64.tar.gz"
    # TODO: Clean this up.

using the named version control system, and then the path inside
that repository. The supported version control systems are:

	Bazaar      .bzr
	Fossil      .fossil
	Git         .git
	Mercurial   .hg
	Subversion  .svn

For example,

	import "example.org/user/foo.hg"

denotes the root directory of the Mercurial repository at
example.org/user/foo or foo.hg, and

	import "example.org/repo.git/foo/bar"

// that repository. The supported version control systems are:
//
//	Bazaar      .bzr
//	Fossil      .fossil
//	Git         .git
//	Mercurial   .hg
//	Subversion  .svn
//
// For example,
//
//	import "example.org/user/foo.hg"
//
// denotes the root directory of the Mercurial repository at
// example.org/user/foo or foo.hg, and
//