// Show the dynamic progress bar package cmd import (	"bytes"	"fmt"	"log/slog"	"strings"	"sync"	"time" 	"github.com/rclone/rclone/fs/accounting"	"github.com/rclone/rclone/fs/log"	"github.com/rclone/rclone/fs/operations"	"github.com/rclone/rclone/lib/terminal") const (	// interval between progress prints	defaultProgressInterval = 500 * time.Millisecond) // startProgress starts the progress bar printing//// It returns a func which should be called to stop the stats.func startProgress() func() {	stopStats := make(chan struct{})	oldSyncPrint := operations.SyncPrintf 	if !log.Redirected() {		// Intercept the log calls if not logging to file or syslog		log.Handler.SetOutput(func(level slog.Level, text string) {			printProgress(text)		})	} 	// Intercept output from functions such as HashLister to stdout	operations.SyncPrintf = func(format string, a ...any) {		printProgress(fmt.Sprintf(format, a...))	} 	var wg sync.WaitGroup	wg.Go(func() {		progressInterval := defaultProgressInterval		if ShowStats() && *statsInterval > 0 {			progressInterval = *statsInterval		}		ticker := time.NewTicker(progressInterval)		for {			select {			case <-ticker.C:				printProgress("")			case <-stopStats:				ticker.Stop()				printProgress("")				if !log.Redirected() {					// Reset intercept of the log calls					log.Handler.ResetOutput()				}				operations.SyncPrintf = oldSyncPrint				fmt.Println("")				return			}		}	})	return func() {		close(stopStats)		wg.Wait()	}} // state for the progress printingvar (	nlines = 0 // number of lines in the previous stats block) // printProgress prints the progress with an optional logfunc printProgress(logMessage string) {	operations.StdoutMutex.Lock()	defer operations.StdoutMutex.Unlock() 	var buf bytes.Buffer	w, _ := terminal.GetSize()	stats := strings.TrimSpace(accounting.GlobalStats().String())	logMessage = strings.TrimSpace(logMessage) 	out := func(s string) {		buf.WriteString(s)	} 	if logMessage != "" {		out("\n")		out(terminal.MoveUp)	}	// Move to the start of the block we wrote erasing all the previous lines	for range nlines - 1 {		out(terminal.EraseLine)		out(terminal.MoveUp)	}	out(terminal.EraseLine)	out(terminal.MoveToStartOfLine)	if logMessage != "" {		out(terminal.EraseLine)		out(logMessage + "\n")	}	fixedLines := strings.Split(stats, "\n")	nlines = len(fixedLines)	for i, line := range fixedLines {		if len(line) > w {			line = line[:w]		}		out(line)		if i != nlines-1 {			out("\n")		}	}	terminal.Write(buf.Bytes())}