adding extract cmd file

cmd/minikube/cmd/extract.go

@@ -0,0 +1,60 @@
+/*
+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 cmd
+
+import (
+	"github.com/spf13/cobra"
+	"k8s.io/minikube/pkg/minikube/exit"
+	"k8s.io/minikube/pkg/minikube/extract"
+)
+
+const (
+	paths     = "paths"
+	functions = "functions"
+	output    = "output"
+)
+
+var extractCmd = &cobra.Command{
+	Use:   "extract",
+	Short: "Extracts all translatable strings and adds them to all translations files.",
+	Long:  "Extracts all translatable strings and adds them to all translations files.",
+	Run: func(cmd *cobra.Command, args []string) {
+		p, err := cmd.Flags().GetStringSlice(paths)
+		if err != nil {
+			exit.WithError("Invalid paths parameter", err)
+		}
+
+		f, err := cmd.Flags().GetStringSlice(functions)
+		if err != nil {
+			exit.WithError("Invalid functions parameter", err)
+		}
+
+		o, err := cmd.Flags().GetString(output)
+		if err != nil {
+			exit.WithError("Invalid output parameter", err)
+		}
+
+		extract.ExtractTranslatableStrings(p, f, o)
+	},
+}
+
+func init() {
+	extractCmd.Flags().StringSlice(paths, []string{"cmd", "pkg"}, "The paths to check for translatable strings.")
+	extractCmd.Flags().StringSlice(functions, []string{"Translate"}, "The functions that translate strings.")
+	extractCmd.Flags().String(output, "pkg/minikube/translate/translations", "The path where translation files are.")
+	RootCmd.AddCommand(extractCmd)
+}