hack/install_dependencies.sh

#!/bin/bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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

kubebuilder_version=2.3.1
kustomize_version=4.0.5
controller_gen_version=v0.5.0
os=$(go env GOOS)
arch=$(go env GOARCH)

printf "\n\nThis script may require elevated privileges. Be ready to enter your password for installation.\n\n"

# Install go modules 
GO111MODULE=on go mod tidy
# Add GOBIN to PATH
if [[ -z "${GOBIN:-}" ]]; then
  export GOBIN="$(cd ${GOPATH:-~/go}/bin && pwd)"
fi
export PATH="${PATH}:${GOBIN}"

#Install Kustomize
if ! (which kustomize); then
  (cd /tmp && curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | sudo bash -s -- ${kustomize_version} /usr/local/bin)
  echo "Installed kustomize at /usr/local/bin/kustomize, version: $(kustomize version --short)"
else
  echo "Kustomize already installed at $(which kustomize), version: $(kustomize version --short)"
fi

# Install Kubebuilder
if ! (which kubebuilder && (kubebuilder version | grep ${kubebuilder_version})); then
  curl -sL "https://go.kubebuilder.io/dl/${kubebuilder_version}/${os}/${arch}" | tar -xz -C /tmp/
  sudo rm -rf /usr/local/kubebuilder
  sudo mv "/tmp/kubebuilder_${kubebuilder_version}_${os}_${arch}" /usr/local/kubebuilder
  export PATH=$PATH:/usr/local/kubebuilder/bin
  echo "Installed kubebuilder at /usr/local/kubebuilder/bin/kubebuilder, version: $(kubebuilder version)"
else
  echo "Kubebuilder already installed at $(which kubebuilder), version: $(kubebuilder version)"
fi

printf "\n\n"

# Install go-licenses
if ! (which go-licenses); then
  go install github.com/google/go-licenses@latest
  echo "Installed go-licenses at $(which go-licenses)"
else
  echo "go-licenses already installed at $(which go-licenses)"
fi

printf "\n\n"

# Controller-Gen
if ! (which controller-gen); then
	go install "sigs.k8s.io/controller-tools/cmd/controller-gen@${controller_gen_version}"
  echo "Installed controller-gen at $(which controller-gen), version: $(controller-gen --version)"
elif ! (controller-gen --version | grep "Version: ${controller_gen_version}"); then
	rm "$(which controller-gen)"
	go install "sigs.k8s.io/controller-tools/cmd/controller-gen@${controller_gen_version}"
  echo "Installed controller-gen at $(which controller-gen), version: $(controller-gen --version)"
else
  echo "controller-gen already installed at $(which controller-gen), version: $(controller-gen --version)"
fi

echo "Make sure to add \$GOBIN or \${GOPATH}/bin to your \$PATH"