duplicati/Duplicati/Library/Main/Operation/Backup/CountFilesHandler.cs

// Copyright (C) 2025, The Duplicati Team
// https://duplicati.com, hello@duplicati.com
// 
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// copy of this software and associated documentation files (the "Software"), 
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// Software is furnished to do so, subject to the following conditions:
// 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
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using System.Collections.Generic;
using System.Threading.Tasks;
using Duplicati.Library.Utility;
using CoCoL;
using Duplicati.Library.Interface;
using Duplicati.Library.Snapshots.USN;

namespace Duplicati.Library.Main.Operation.Backup
{
    internal static class CountFilesHandler
    {
        public static async Task Run(
            ISourceProvider sources,
            UsnJournalService journalService,
            BackupResults result,
            Options options,
            IFilter filter,
            HashSet<string> blacklistPaths,
            Common.ITaskReader taskreader,
            System.Threading.CancellationToken token
        )
        {
            // Keep the log channel from the parent scope
            using (Logging.Log.StartIsolatingScope(true))
            {
                Channels channels = new();
                var enumeratorTask = FileEnumerationProcess.Run(
                    channels, sources, journalService, options.FileAttributeFilter, filter,
                    options.SymlinkPolicy, options.HardlinkPolicy,
                    options.ExcludeEmptyFolders, options.IgnoreFilenames,
                    blacklistPaths, options.ChangedFilelist, taskreader, null, token);

                var counterTask = AutomationExtensions.RunTask(new
                {
                    Input = channels.SourcePaths.AsRead()
                },

                async self =>
                {
                    var count = 0L;
                    var size = 0L;

                    try
                    {
                        while (await taskreader.ProgressRendevouz() && !token.IsCancellationRequested)
                        {
                            var entry = await self.Input.ReadAsync();
                            if (entry.IsFolder)
                                continue;

                            count++;

                            try
                            {
                                size += entry.Size;
                            }
                            catch
                            {
                            }

                            result.OperationProgressUpdater.UpdatefileCount(count, size, false);
                        }
                    }
                    finally
                    {
                        result.OperationProgressUpdater.UpdatefileCount(count, size, true);
                    }
                });

                await Task.WhenAll(enumeratorTask, counterTask);
            }
        }
    }
}