Use stable.txt instead of latest.txt and add a script to set that file.

build/mark-stable-release.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Marks the current stable version
+
+if [[ -z "$1" ]]; then
+  echo "Usage: $0 <version>"
+  exit 1
+fi
+
+if ! gsutil ls gs://kubernetes-release/release/${1}/kubernetes.tar.gz; then
+  echo "Release files don't exist, aborting."
+  exit 2
+fi
+
+STABLE_FILE_LOCATION="kubernetes-release/release/stable.txt"
+
+version_file=$(mktemp -t stable)
+
+echo $1 >> ${version_file}
+echo "Uploading stable version $1 to google storage"
+gsutil cp ${version_file} "gs://${STABLE_FILE_LOCATION}"
+echo "Making it world readable"
+gsutil acl ch -R -g all:R "gs://${STABLE_FILE_LOCATION}"
+
+rm ${version_file}
+
+value=$(curl -s https://storage.googleapis.com/${STABLE_FILE_LOCATION})
+echo "Validating version file"
+if [[ "${value}" != "${1}" ]]; then
+  echo "Error validating upload, :${value}: vs expected :${1}:"
+  exit 1
+fi