#!/bin/bash

# Copyright 2016 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.

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

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

# Detect the OS name/arch so that we can find our binary
case{
  Darwin {
    setvar host_os = 'darwin'
    }
  Linux {
    setvar host_os = 'linux'
    }
  * {
    echo "Unsupported host OS.  Must be Linux or Mac OS X." >&2
    exit 1
    }
}

case{
  x86_64* {
    setvar host_arch = 'amd64'
    }
  i?86_64* {
    setvar host_arch = 'amd64'
    }
  amd64* {
    setvar host_arch = 'amd64'
    }
  arm* {
    setvar host_arch = 'arm'
    }
  i?86* {
    setvar host_arch = '386'
    }
  s390x* {
    setvar host_arch = 's390x'
    }
  ppc64le* {
    setvar host_arch = 'ppc64le'
    }
  * {
    echo "Unsupported host arch. Must be x86_64, 386, arm, s390x or ppc64le." >&2
    exit 1
    }
}

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

proc get_bin {
  setvar bin = "${1:-}"
  setvar srcdir = "${2:-}"
  if [[ "${bin}" == "" ]] {
    echo "Binary name is required"
    exit 1
  }
  if [[ "${srcdir}" == "" ]] {
    echo "Source directory path is required"
    exit 1
  }
  
  setvar locations = ''(
    "${KUBE_ROOT}/_output/bin/${bin}"
    "${KUBE_ROOT}/_output/dockerized/bin/${host_os}/${host_arch}/${bin}"
    "${KUBE_ROOT}/_output/local/bin/${host_os}/${host_arch}/${bin}"
    "${KUBE_ROOT}/bazel-bin/${srcdir}/${bin}"
    "${KUBE_ROOT}/platforms/${host_os}/${host_arch}/${bin}"
  )
  echo $( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )
}

proc print_error {
  do {
    echo "It looks as if you don't have a compiled ${1:-} binary"
    echo
    echo "If you are running from a clone of the git repo, please run"
    echo "'./build/run.sh make cross'. 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
}