build: initial project release

src/process.dummy.app/_commands/LengthCommand.cs

@@ -0,0 +1,40 @@
+// Copyright (c) The Geekeey Authors
+// SPDX-License-Identifier: EUPL-1.2
+
+using System.Buffers;
+using System.Globalization;
+
+using Spectre.Console.Cli;
+
+internal sealed class LengthCommand : AsyncOutputCommand<LengthCommand.Settings>
+{
+	public sealed class Settings : OutputCommandSettings
+	{
+	}
+
+	public override async Task<int> ExecuteAsync(CommandContext context, Settings settings, CancellationToken cancellationToken)
+	{
+		using var output = Output.Connect();
+
+		using var buffer = MemoryPool<byte>.Shared.Rent(81920);
+
+		var count = 0L;
+		while (true)
+		{
+			var bytesRead = await output.Stdin.BaseStream.ReadAsync(buffer.Memory, cancellationToken);
+			if (bytesRead <= 0)
+			{
+				break;
+			}
+
+			count += bytesRead;
+		}
+
+		foreach (var writer in output.GetWriters(settings.Target))
+		{
+			await writer.WriteLineAsync(count.ToString(CultureInfo.InvariantCulture));
+		}
+
+		return 0;
+	}
+}