Attempt native imagebuilder image

REMOVED/hack/utils.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+
+# Copyright 2020 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.
+
+case "${OSTYPE}" in
+linux*)
+  HOSTOS=linux
+  ;;
+darwin*)
+  HOSTOS=darwin
+  ;;
+*)
+  echo "unsupported HOSTOS=${OSTYPE}" 1>&2
+  exit 1
+  ;;
+esac
+
+_hostarch=$(uname -m)
+case "${_hostarch}" in
+*64*)
+  HOSTARCH=amd64
+  ;;
+*386*)
+  HOSTARCH=386
+  ;;
+*686*)
+  HOSTARCH=386
+  ;;
+*)
+  echo "unsupported HOSTARCH=${_hostarch}" 1>&2
+  exit 1
+  ;;
+esac
+
+checksum_sha256() {
+  if command -v shasum >/dev/null 2>&1; then
+    shasum -a 256 -c "${1}"
+  elif command -v sha256sum >/dev/null 2>&1; then
+    sha256sum -c "${1}"
+  else
+    echo "missing shasum tool" 1>&2
+    return 1
+  fi
+}
+
+get_shasum() {
+  local present_shasum=''
+  if command -v shasum >/dev/null 2>&1; then
+    present_shasum=$(shasum -a 256 "${1}"| awk -F' ' '{print $1}')
+  elif command -v sha256sum >/dev/null 2>&1; then
+    present_shasum=$(sha256sum "${1}" | awk -F' ' '{print $1}')
+  else
+    echo "missing shasum tool" 1>&2
+    return 1
+  fi
+  echo "$present_shasum"
+}
+
+ensure_py3_bin() {
+  # If given executable is not available, the user Python bin dir is not in path
+  # This function assumes the executable to be checked was installed with
+  # pip3 install --user ...
+  if ! command -v "${1}" >/dev/null 2>&1; then
+    echo "User's Python3 binary directory must be in \$PATH" 1>&2
+    echo "Location of package is:" 1>&2
+    pip3 show --disable-pip-version-check ${2:-$1} | grep "Location"
+    echo "\$PATH is currently: $PATH" 1>&2
+    exit 1
+  fi
+}
+
+ensure_py3() {
+  if ! command -v python3 >/dev/null 2>&1; then
+    echo "python3 binary must be in \$PATH" 1>&2
+    exit 1
+  fi
+  if ! command -v pip3 >/dev/null 2>&1; then
+    curl -SsL https://bootstrap.pypa.io/get-pip.py -o get-pip.py
+    python3 get-pip.py --user
+    rm -f get-pip.py
+    ensure_py3_bin pip3
+  fi
+}