binary_hyperkube_shell.go

// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2018 Datadog, Inc.

package setup

var (
	hyperkubeShellTpl = `#!/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

BINS=(
	kube-apiserver
	kube-controller-manager
	kube-proxy
	kube-scheduler
	kubectl
	kubelet
)

function array_contains() {
	local search="$1"
	local element
	shift
	for element; do
	if [[ "${element}" == "${search}" ]]; then
		return 0
		fi
	done
	return 1
}

function print_usage() {
	cat <<EOF
Usage:
	$(basename "$0") [command]

Available Commands:
	help                     Help about any command
	kube-apiserver
	kube-controller-manager
	kube-proxy
	kube-scheduler
	kubectl                  kubectl controls the Kubernetes cluster manager
	kubelet
EOF
	exit 0
}

function main() {
	command=$(basename "$0")
	if ! array_contains "$command" "${BINS[@]}"; then
			if [[ "$#" -lt 1 || "${1:-}" == "--help" || "${1:-}" == "help" ]]; then
			print_usage
			fi
			if ! array_contains "$1" "${BINS[@]}"; then
			echo "$1: command not supported"
			print_usage
			fi
			command=${1}
			shift
	fi

	if ! command -v "${command}" &>/dev/null; then
	echo "${command}: command not found"
	exit 1
	fi
	exec "${command}" "${@}"
}

export PATH="{{.binABSPath}}:$PATH"

main "${@}"
`
)