package version import (	"fmt"	"io/ioutil"	"net/http"	"strings"	"time" 	"github.com/coreos/go-semver/semver"	"github.com/pkg/errors"	"github.com/rclone/rclone/cmd"	"github.com/rclone/rclone/fs"	"github.com/rclone/rclone/fs/config/flags"	"github.com/spf13/cobra") var (	check = false) func init() {	cmd.Root.AddCommand(commandDefinition)	cmdFlags := commandDefinition.Flags()	flags.BoolVarP(cmdFlags, &check, "check", "", false, "Check for new version.")} var commandDefinition = &cobra.Command{	Use:   "version",	Short: `Show the version number.`,	Long: `Show the rclone version number, the go version, the build targetOS and architecture, the runtime OS and kernel version and bitness,build tags and the type of executable (static or dynamic). For example:     $ rclone version    rclone v1.55.0    - os/version: ubuntu 18.04 (64 bit)    - os/kernel: 4.15.0-136-generic (x86_64)    - os/type: linux    - os/arch: amd64    - go/version: go1.16    - go/linking: static    - go/tags: none Note: before rclone version 1.55 the os/type and os/arch lines were merged,      and the "go/version" line was tagged as "go version". If you supply the --check flag, then it will do an online check tocompare your version with the latest release and the latest beta.     $ rclone version --check    yours:  1.42.0.6    latest: 1.42          (released 2018-06-16)    beta:   1.42.0.5      (released 2018-06-17) Or     $ rclone version --check    yours:  1.41    latest: 1.42          (released 2018-06-16)      upgrade: https://downloads.rclone.org/v1.42    beta:   1.42.0.5      (released 2018-06-17)      upgrade: https://beta.rclone.org/v1.42-005-g56e1e820 `,	Run: func(command *cobra.Command, args []string) {		cmd.CheckArgs(0, 0, command, args)		if check {			CheckVersion()		} else {			cmd.ShowVersion()		}	},} // strip a leading v off the stringfunc stripV(s string) string {	if len(s) > 0 && s[0] == 'v' {		return s[1:]	}	return s} // GetVersion gets the version available for downloadfunc GetVersion(url string) (v *semver.Version, vs string, date time.Time, err error) {	resp, err := http.Get(url)	if err != nil {		return v, vs, date, err	}	defer fs.CheckClose(resp.Body, &err)	if resp.StatusCode != http.StatusOK {		return v, vs, date, errors.New(resp.Status)	}	bodyBytes, err := ioutil.ReadAll(resp.Body)	if err != nil {		return v, vs, date, err	}	vs = strings.TrimSpace(string(bodyBytes))	vs = strings.TrimPrefix(vs, "rclone ")	vs = strings.TrimRight(vs, "β")	date, err = http.ParseTime(resp.Header.Get("Last-Modified"))	if err != nil {		return v, vs, date, err	}	v, err = semver.NewVersion(stripV(vs))	return v, vs, date, err} // CheckVersion checks the installed version against available downloadsfunc CheckVersion() {	vCurrent, err := semver.NewVersion(stripV(fs.Version))	if err != nil {		fs.Errorf(nil, "Failed to parse version: %v", err)	}	const timeFormat = "2006-01-02" 	printVersion := func(what, url string) {		v, vs, t, err := GetVersion(url + "version.txt")		if err != nil {			fs.Errorf(nil, "Failed to get rclone %s version: %v", what, err)			return		}		fmt.Printf("%-8s%-40v %20s\n",			what+":",			v,			"(released "+t.Format(timeFormat)+")",		)		if v.Compare(*vCurrent) > 0 {			fmt.Printf("  upgrade: %s\n", url+vs)		}	}	fmt.Printf("yours:  %-13s\n", vCurrent)	printVersion(		"latest",		"https://downloads.rclone.org/",	)	printVersion(		"beta",		"https://beta.rclone.org/",	)	if strings.HasSuffix(fs.Version, "-DEV") {		fmt.Println("Your version is compiled from git so comparisons may be wrong.")	}}