60 lines
1.8 KiB
Bash
60 lines
1.8 KiB
Bash
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#!/usr/bin/env bash
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# Copyright 2021 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o nounset
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set -o pipefail
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[[ -n ${DEBUG:-} ]] && set -o xtrace
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# Ensure the go tool exists and is a viable version.
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verify_go_version() {
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if [[ -z "$(command -v go)" ]]; then
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if [[ "${INSTALL_GO:-"true"}" == "true" ]]; then
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curl -sSL https://golang.org/dl/go${GO_VERSION:-"1.16.3"}.linux-amd64.tar.gz | tar -C /usr/local -xzf -
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export PATH=/usr/local/go/bin:$PATH
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export PATH=$(go env GOPATH)/bin:$PATH
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else
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cat <<EOF
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Can't find 'go' in PATH, please fix and retry.
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See http://golang.org/doc/install for installation instructions.
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EOF
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return 2
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fi
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fi
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local go_version
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IFS=" " read -ra go_version <<< "$(go version)"
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local minimum_go_version
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minimum_go_version=1.16.0
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if [[ "${minimum_go_version}" != $(echo -e "${minimum_go_version}\n${go_version[2]}" | sort -s -t. -k 1,1 -k 2,2n -k 3,3n | head -n1) && "${go_version[2]}" != "devel" ]]; then
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cat <<EOF
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Detected go version: ${go_version[*]}.
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Kubernetes requires ${minimum_go_version} or greater.
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Please install ${minimum_go_version} or later.
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EOF
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return 2
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fi
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}
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echo "Checking if go is available"
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verify_go_version
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go version
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# Explicitly opt into go modules, even though we're inside a GOPATH directory
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export GO111MODULE=on
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