#!/usr/bin/env bash

# Copyright 2019 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

[[ -n ${DEBUG:-} ]] && set -o xtrace

_version="1.8.5"

# Change directories to the parent directory of the one in which this
# script is located.
cd "$(dirname "${BASH_SOURCE[0]}")/.."

source hack/utils.sh

if command -v packer >/dev/null 2>&1; then exit 0; fi

mkdir -p .local/bin && cd .local/bin

SED="sed"
if command -v gsed >/dev/null; then
  SED="gsed"
fi
if ! (${SED} --version 2>&1 | grep -q GNU); then
  echo "!!! GNU sed is required.  If on OS X, use 'brew install gnu-sed'." >&2
  exit 1
fi

_chkfile="packer_${_version}_SHA256SUMS"
_chk_url="https://releases.hashicorp.com/packer/${_version}/${_chkfile}"
_zipfile="packer_${_version}_${HOSTOS}_${HOSTARCH}.zip"
_zip_url="https://releases.hashicorp.com/packer/${_version}/${_zipfile}"
curl -SsLO "${_chk_url}"
curl -SsLO "${_zip_url}"
${SED} -i -n "/${HOSTOS}_${HOSTARCH}/p" "${_chkfile}"
checksum_sha256 "${_chkfile}"
unzip -o "${_zipfile}"
rm -f "${_chkfile}" "${_zipfile}"
echo "'packer' has been installed to $(pwd), make sure this directory is in your \$PATH"