#!/bin/bash

# Copyright 2014 The Kubernetes Authors 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.

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

echo "-=-=-=-=-=-=-=-=-=-="
echo "NOTE:"
echo "kubectl.sh is deprecated and will be removed soon."
echo "please replace all usage with calls to the kubectl"
echo "binary and ensure that it is in your PATH." 
echo ""
echo "Please see 'kubectl help config' for more details"
echo "about configuring kubectl for your cluster."
echo "-=-=-=-=-=-=-=-=-=-="


KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
source "${KUBE_ROOT}/cluster/kube-env.sh"
UTILS=${KUBE_ROOT}/cluster/${KUBERNETES_PROVIDER}/util.sh
if [ -f ${UTILS} ]; then
    source "${UTILS}"
fi

# Get the absolute path of the directory component of a file, i.e. the
# absolute path of the dirname of $1.
get_absolute_dirname() {
  echo "$(cd "$(dirname "$1")" && pwd)"
}

# Detect the OS name/arch so that we can find our binary
case "$(uname -s)" in
  Darwin)
    host_os=darwin
    ;;
  Linux)
    host_os=linux
    ;;
  *)
    echo "Unsupported host OS.  Must be Linux or Mac OS X." >&2
    exit 1
    ;;
esac

case "$(uname -m)" in
  x86_64*)
    host_arch=amd64
    ;;
  i?86_64*)
    host_arch=amd64
    ;;
  amd64*)
    host_arch=amd64
    ;;
  arm*)
    host_arch=arm
    ;;
  i?86*)
    host_arch=386
    ;;
  *)
    echo "Unsupported host arch. Must be x86_64, 386 or arm." >&2
    exit 1
    ;;
esac

# If KUBECTL_PATH isn't set, gather up the list of likely places and use ls
# to find the latest one.
if [[ -z "${KUBECTL_PATH:-}" ]]; then
  locations=(
    "${KUBE_ROOT}/_output/dockerized/bin/${host_os}/${host_arch}/kubectl"
    "${KUBE_ROOT}/_output/local/bin/${host_os}/${host_arch}/kubectl"
    "${KUBE_ROOT}/platforms/${host_os}/${host_arch}/kubectl"
  )
  kubectl=$( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )

  if [[ ! -x "$kubectl" ]]; then
    {
      echo "It looks as if you don't have a compiled kubectl binary"
      echo
      echo "If you are running from a clone of the git repo, please run"
      echo "'./build/run.sh hack/build-cross.sh'. Note that this requires having"
      echo "Docker installed."
      echo
      echo "If you are running from a binary release tarball, something is wrong. "
      echo "Look at http://kubernetes.io/ for information on how to contact the "
      echo "development team for help."
    } >&2
    exit 1
  fi
elif [[ ! -x "${KUBECTL_PATH}" ]]; then
  {
    echo "KUBECTL_PATH environment variable set to '${KUBECTL_PATH}', but "
    echo "this doesn't seem to be a valid executable."
  } >&2
  exit 1
fi
kubectl="${KUBECTL_PATH:-${kubectl}}"

if [[ "$KUBERNETES_PROVIDER" == "gke" ]]; then
  detect-project &> /dev/null
elif [[ "$KUBERNETES_PROVIDER" == "ubuntu" || "$KUBERNETES_PROVIDER" == "juju" ]]; then
  detect-master > /dev/null
  config=(
    "--server=http://${KUBE_MASTER_IP}:8080"
  )
fi


if false; then
  # disable these debugging messages by default
  echo "current-context: \"$(${kubectl} "${config[@]:+${config[@]}}" config view -o template --template='{{index . "current-context"}}')\"" >&2
  echo "Running:" "${kubectl}" "${config[@]:+${config[@]}}" "${@+$@}" >&2
fi

"${kubectl}" "${config[@]:+${config[@]}}" "${@+$@}"