package touch import (	"bytes"	"time" 	"github.com/ncw/rclone/cmd"	"github.com/ncw/rclone/fs"	"github.com/ncw/rclone/fs/object"	"github.com/pkg/errors"	"github.com/spf13/cobra") var (	notCreateNewFile bool	timeAsArgument   string) const defaultLayout string = "060102"const layoutDateWithTime = "2006-01-02T15:04:05" func init() {	cmd.Root.AddCommand(commandDefintion)	flags := commandDefintion.Flags()	flags.BoolVarP(&notCreateNewFile, "no-create", "C", false, "Do not create the file if it does not exist.")	flags.StringVarP(&timeAsArgument, "timestamp", "t", "", "Change the modification times to the specified time instead of the current time of day. The argument is of the form 'YYMMDD' (ex. 17.10.30) or 'YYYY-MM-DDTHH:MM:SS' (ex. 2006-01-02T15:04:05)")} var commandDefintion = &cobra.Command{	Use:   "touch remote:path",	Short: `Create new file or change file modification time.`,	Run: func(command *cobra.Command, args []string) {		cmd.CheckArgs(1, 1, command, args)		fsrc, srcFileName := cmd.NewFsDstFile(args)		cmd.Run(true, false, command, func() error {			return Touch(fsrc, srcFileName)		})	},} //Touch create new file or change file modification time.func Touch(fsrc fs.Fs, srcFileName string) error {	timeAtr := time.Now()	if timeAsArgument != "" {		layout := defaultLayout		if len(timeAsArgument) == len(layoutDateWithTime) {			layout = layoutDateWithTime		}		timeAtrFromFlags, err := time.Parse(layout, timeAsArgument)		if err != nil {			return errors.Wrap(err, "failed to parse date/time argument")		}		timeAtr = timeAtrFromFlags	}	file, err := fsrc.NewObject(srcFileName)	if err != nil {		if !notCreateNewFile {			var buffer []byte			src := object.NewStaticObjectInfo(srcFileName, timeAtr, int64(len(buffer)), true, nil, fsrc)			_, err = fsrc.Put(bytes.NewBuffer(buffer), src)			if err != nil {				return err			}		}		return nil	}	err = file.SetModTime(timeAtr)	if err != nil {		return errors.Wrap(err, "touch: couldn't set mod time")	}	return nil}