Add script to update kubernetes version

hack/kubernetes_version/update_kubernetes_version.go

@@ -0,0 +1,76 @@
+/*
+Copyright 2019 The Kubernetes Authors All rights reserved.
+
+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.
+*/
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+func main() {
+	if len(os.Args) == 1 {
+		fmt.Println("Usage: go run update_kubernetes_version.go <kubernetes_version>")
+		os.Exit(1)
+	}
+
+	v := os.Args[1]
+	if !strings.HasPrefix(v, "v") {
+		v = "v" + v
+	}
+
+	constantsFile := "../../pkg/minikube/constants/constants.go"
+	cf, err := ioutil.ReadFile(constantsFile)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	info, err := os.Stat(constantsFile)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	mode := info.Mode()
+
+	re := regexp.MustCompile(`var DefaultKubernetesVersion = .*`)
+	f := re.ReplaceAllString(string(cf), "var DefaultKubernetesVersion = \""+v+"\"")
+
+	re = regexp.MustCompile(`var NewestKubernetesVersion = .*`)
+	f = re.ReplaceAllString(f, "var NewestKubernetesVersion = \""+v+"\"")
+
+	ioutil.WriteFile(constantsFile, []byte(f), mode)
+
+	testData := "../../pkg/minikube/bootstrapper/kubeadm/testdata"
+
+	err = filepath.Walk(testData, func(path string, info os.FileInfo, err error) error {
+		if strings.HasSuffix(path, "default.yaml") {
+			cf, err = ioutil.ReadFile(path)
+			if err != nil {
+				// Keep going if this errors out
+				fmt.Println(err)
+			}
+			re = regexp.MustCompile(`kubernetesVersion: .*`)
+			cf = []byte(re.ReplaceAllString(string(cf), "kubernetesVersion: "+v))
+			ioutil.WriteFile(path, cf, info.Mode())
+		}
+		return nil
+	})
+}