#!/bin/bash

# Copyright 2014 The Kubernetes Authors.
#
# 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.

# Push a new release to the cluster.
#
# This will find the release tar, cause it to be downloaded, unpacked, installed
# and enacted.

set -o errexit
set -o nounset
set -o pipefail

echo "kube-push.sh is currently broken; see https://github.com/kubernetes/kubernetes/issues/17397"
exit 1

setvar KUBE_ROOT = "$(dirname "${BASH_SOURCE}")/.."

if test -f "${KUBE_ROOT}/cluster/env.sh" {
    source "${KUBE_ROOT}/cluster/env.sh"
}

source "${KUBE_ROOT}/cluster/kube-util.sh"

proc usage {
  echo "${0} [-m|-n <node id>] <version>"
  echo "  Updates Kubernetes binaries. Can be done for all components (by default), master(-m) or specified node(-n)."
  echo "  If the version is not specified will try to use local binaries."
  echo "  Warning: upgrading single node is experimental"
}

setvar push_to_master = 'false'
setvar push_to_node = 'false'

while getopts "mn:h" opt {
  case{
    m {
      setvar push_to_master = 'true'}
    n {
      setvar push_to_node = 'true'
      setvar node_id = "$OPTARG"}
    h {
      usage
      exit 0}
    \? {
      echo "Invalid option: -$OPTARG" >&2
      usage
      exit 1}
  }
}
shift $((OPTIND-1))

if [[ "${push_to_master}" == "true" ]] && [[ "${push_to_node}" == "true" ]] {
  echo "Only one of options -m -n should be specified"
  usage
  exit 1
}

verify-prereqs
verify-kube-binaries
setvar KUBE_VERSION = ${1-}

if [[ "${push_to_master}" == "false" ]] && [[ "${push_to_node}" == "false" ]] {
  echo "Updating cluster using provider: $KUBERNETES_PROVIDER"
  kube-push
}

if [[ "${push_to_master}" == "true" ]] {
  echo "Updating master to version ${KUBE_VERSION:-"dev"}"
  prepare-push false
  push-master
}

if [[ "${push_to_node}" == "true" ]] {
  echo "Updating node $node_id to version ${KUBE_VERSION:-"dev"}"
  prepare-push true
  push-node $node_id
}

echo "Validating cluster post-push..."

"${KUBE_ROOT}/cluster/validate-cluster.sh"

echo "Done"