Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/golang.org/x/tools/cmd/getgo/steps.go

@@ -0,0 +1,133 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !plan9
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+)
+
+type step func(context.Context) error
+
+func welcome(ctx context.Context) error {
+	fmt.Println("Welcome to the Go installer!")
+	answer, err := prompt(ctx, "Would you like to install Go? Y/n", "Y")
+	if err != nil {
+		return err
+	}
+	if strings.ToLower(answer) != "y" {
+		fmt.Println("Exiting install.")
+		return exitCleanly
+	}
+
+	return nil
+}
+
+func checkOthers(ctx context.Context) error {
+	// TODO: if go is currently installed install new version over that
+	path, err := whichGo(ctx)
+	if err != nil {
+		fmt.Printf("Cannot check if Go is already installed:\n%v\n", err)
+	}
+	if path == "" {
+		return nil
+	}
+	if path != installPath {
+		fmt.Printf("Go is already installed at %v; remove it from your PATH.\n", path)
+	}
+	return nil
+}
+
+func chooseVersion(ctx context.Context) error {
+	if *goVersion != "" {
+		return nil
+	}
+
+	var err error
+	*goVersion, err = getLatestGoVersion()
+	if err != nil {
+		return err
+	}
+
+	answer, err := prompt(ctx, fmt.Sprintf("The latest Go version is %s, install that? Y/n", *goVersion), "Y")
+	if err != nil {
+		return err
+	}
+
+	if strings.ToLower(answer) != "y" {
+		// TODO: handle passing a version
+		fmt.Println("Aborting install.")
+		return exitCleanly
+	}
+
+	return nil
+}
+
+func downloadGo(ctx context.Context) error {
+	answer, err := prompt(ctx, fmt.Sprintf("Download Go version %s to %s? Y/n", *goVersion, installPath), "Y")
+	if err != nil {
+		return err
+	}
+
+	if strings.ToLower(answer) != "y" {
+		fmt.Println("Aborting install.")
+		return exitCleanly
+	}
+
+	fmt.Printf("Downloading Go version %s to %s\n", *goVersion, installPath)
+	fmt.Println("This may take a bit of time...")
+
+	if err := downloadGoVersion(*goVersion, runtime.GOOS, arch, installPath); err != nil {
+		return err
+	}
+
+	if err := appendToPATH(filepath.Join(installPath, "bin")); err != nil {
+		return err
+	}
+
+	fmt.Println("Downloaded!")
+	return nil
+}
+
+func setupGOPATH(ctx context.Context) error {
+	answer, err := prompt(ctx, "Would you like us to setup your GOPATH? Y/n", "Y")
+	if err != nil {
+		return err
+	}
+
+	if strings.ToLower(answer) != "y" {
+		fmt.Println("Exiting and not setting up GOPATH.")
+		return exitCleanly
+	}
+
+	fmt.Println("Setting up GOPATH")
+	home, err := getHomeDir()
+	if err != nil {
+		return err
+	}
+
+	gopath := os.Getenv("GOPATH")
+	if gopath == "" {
+		// set $GOPATH
+		gopath = filepath.Join(home, "go")
+		if err := persistEnvVar("GOPATH", gopath); err != nil {
+			return err
+		}
+		fmt.Println("GOPATH has been set up!")
+	} else {
+		verbosef("GOPATH is already set to %s", gopath)
+	}
+
+	if err := appendToPATH(filepath.Join(gopath, "bin")); err != nil {
+		return err
+	}
+	return persistEnvChangesForSession()
+}