102 lines
2.7 KiB
Go
102 lines
2.7 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package main
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import (
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"context"
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"fmt"
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"io"
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"os"
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"os/exec"
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"runtime"
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"strings"
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"log"
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"cloud.google.com/go/storage"
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"github.com/pkg/errors"
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)
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const (
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bucketName = "minikube"
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)
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// download minikube latest to file
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func downloadMinikube(ctx context.Context, minikubePath string) error {
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client, err := storage.NewClient(ctx)
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if err != nil {
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return errors.Wrap(err, "creating client")
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}
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obj := client.Bucket("minikube").Object(fmt.Sprintf("latest/%s", binary()))
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if localMinikubeIsLatest(ctx, minikubePath, obj) {
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log.Print("local minikube is latest, skipping download...")
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return nil
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}
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os.Remove(minikubePath)
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// download minikube binary from GCS
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rc, err := obj.NewReader(ctx)
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if err != nil {
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return errors.Wrap(err, "gcs new reader")
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}
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defer rc.Close()
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data, err := io.ReadAll(rc)
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if err != nil {
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return errors.Wrap(err, "io read all")
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}
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log.Printf("downloading gs://%s/%s to %v", bucketName, binary(), minikubePath)
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if err := os.WriteFile(minikubePath, data, 0777); err != nil {
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return errors.Wrap(err, "writing minikubePath")
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}
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if err := os.Chmod(minikubePath, 0700); err != nil {
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return errors.Wrap(err, "chmod")
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}
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return nil
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}
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// localMinikubeIsLatest returns true if the local version of minikube
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// matches the latest version in GCS
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func localMinikubeIsLatest(ctx context.Context, minikubePath string, obj *storage.ObjectHandle) bool {
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log.Print("checking if local minikube is latest...")
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attrs, err := obj.Attrs(ctx)
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if err != nil {
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log.Printf("error getting %s object attrs: %v", obj.ObjectName(), err)
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return false
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}
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gcsMinikubeVersion, ok := attrs.Metadata["commit"]
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if !ok {
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log.Printf("there is no commit: %v", attrs.Metadata)
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return false
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}
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currentMinikubeVersion, err := exec.Command(minikubePath, "version", "--output=json").Output()
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if err != nil {
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log.Printf("error running [%s version]: %v", minikubePath, err)
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return false
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}
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return strings.Contains(string(currentMinikubeVersion), gcsMinikubeVersion)
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}
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func binary() string {
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b := fmt.Sprintf("minikube-%s-amd64", runtime.GOOS)
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if runtime.GOOS == "windows" {
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b += ".exe"
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}
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return b
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}
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