Test dependencies

hack/ensure-packer.sh

@@ -0,0 +1,54 @@
+#!/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"