Codebasis als Dateien ins Arbeitsrepo statt als Gitlink

QuellCode/CentronERP war nur als Gitlink (Submodul-Referenz auf 79c1142)
getrackt, ohne .gitmodules und ohne erreichbares Remote. Der
Untersuchungsgegenstand der Versuchsreihe war damit nicht reproduzierbar
gesichert: Ein Klon haette ein leeres Verzeichnis erhalten, und die Belege
der 3.287 Anforderungen waeren nicht ueberpruefbar gewesen.

Umstellung:
- Historie nach c:\DEV\CentronERP_git_snapshot_79c1142 ausgelagert
  (vollstaendig lesbar, enthaelt 79c1142 und Vorgaenger 89ccfd6)
- Gitlink aus dem Index entfernt
- Dateiinhalt aufgenommen: 24.557 Dateien, rund 333 MB

Die verschachtelte .gitignore der Codebasis gilt weiter, Build-Artefakte
bleiben ausgeschlossen. Details in Versuche/Versuch_01/_Codebasis-Nachweis.md

QuellCode/CentronERP/deployment/WixSharpInstaller/Program.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using WixSharp;
+using WixSharp.CommonTasks;
+using WixSharp.Controls;
+
+namespace WixSharpInstaller
+{
+    class Program
+    {
+        static int Main()
+        {
+            try
+            {
+                // Validate input files
+                var sourceBaseDir = GetInputFileDirectoryPath();
+                if (Directory.GetFiles(sourceBaseDir).Any() == false)
+                    throw new InvalidOperationException("The \"Files\" input directory is empty.");
+
+                // Create project with important properties
+                var project = new Project("c-entron Nexus");
+                project.GUID = new Guid("BBBE4001-00B1-41AC-B76F-CD2977F23A89");
+                project.SetVersionFromFile(Path.Combine(sourceBaseDir, "Files", "CentronNexus.Host.dll"));
+                project.MajorUpgrade = new MajorUpgrade() // This is basically MajorUpgrade.Default but with AllowSameVersionUpgrades set to true
+                {
+                    Schedule = new UpgradeSchedule?(UpgradeSchedule.afterInstallInitialize),
+                    DowngradeErrorMessage = "Eine neuere Version von [ProductName] ist bereits installiert.",
+                    AllowSameVersionUpgrades = true // This is needed, to force major upgrades when we change only the 4th number in the version (MSI by default only checks the first 3 numbers)
+                };
+                project.SourceBaseDir = sourceBaseDir;
+                project.ReinstallMode = "amus"; // Make sure to always re-install all files (see commit message for more details)
+                project.Language = "de-DE";
+                project.ControlPanelInfo.Manufacturer = "NEXOWARE Systems GmbH";
+
+                // Add all files from the "Files" input directory
+                project.AddDir(new Dir("%ProgramFiles%\\c-entron software gmbh\\c-entron Nexus", new Files("Files\\*.*")));
+
+                // Install CentronNexus.exe as windows-service
+                project.ResolveWildCards().FindFirstFile("CentronNexus.Host.exe").ServiceInstaller = new ServiceInstaller
+                {
+                    Name = "CentronNexus",
+                    DisplayName = "NEXOWARE ServiceBoard",
+                    Description = "Dieser Windows-Dienst startet NEXOWARE ServiceBoard, und damit alle Projekte die darin enthalten sind, wie z.B. das Web-Angebot oder das ServiceBoard.",
+
+                    // Make the service start automatically with windows
+                    Start = SvcStartType.auto,
+
+                    // The documentation states that "Install" is the default value, but it's actually not correct, same for StopOn and RemoveOn
+                    StartOn = SvcEvent.Install,
+                    StopOn = SvcEvent.InstallUninstall_Wait,
+                    RemoveOn = SvcEvent.Uninstall_Wait,
+                };
+
+                // Declare UI
+                project.UI = WUI.WixUI_InstallDir;
+                project.RemoveDialogsBetween(NativeDialogs.WelcomeDlg, NativeDialogs.InstallDirDlg); // Remove the license-agreement dialog from the WixUI_InstallDir default UI, its between the WelcomeDlg and the InstallDirDlg
+                project.BackgroundImage = "Images\\Installer-Background.bmp";
+                project.BannerImage = "Images\\Installer-Banner.bmp";
+
+                // Build MSI — set explicit output path to avoid ambiguity with relative working directory
+                var outputDir = Path.GetDirectoryName(typeof(Program).Assembly.Location)!;
+                project.OutFileName = Path.Combine(outputDir, "c-entron Nexus");
+                project.PreserveTempFiles = true;
+                Compiler.BuildMsi(project);
+
+                var msiPath = project.OutFileName + ".msi";
+                if (!System.IO.File.Exists(msiPath))
+                    throw new FileNotFoundException($"MSI was not created at expected path: {msiPath}", msiPath);
+
+                Console.WriteLine($"MSI successfully created at: {msiPath}");
+                return 0;
+            }
+#pragma warning disable CA1031
+            catch (Exception e)
+#pragma warning restore CA1031
+            {
+                Console.WriteLine(e);
+                return 1;
+            }
+        }
+
+        private static string GetInputFileDirectoryPath([CallerFilePath] string callerFilePath = null)
+        {
+            return Path.GetDirectoryName(callerFilePath);
+        }
+    }
+}

QuellCode/CentronERP/deployment/WixSharpInstaller/WixSharpInstaller.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <Nullable>disable</Nullable>
+    <DefaultItemExcludes>$(DefaultItemExcludes);Files\**</DefaultItemExcludes>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="WixSharp.Core" Version="2.13.0" />
+    <PackageReference Remove="Nerdbank.GitVersioning" />
+  </ItemGroup>
+
+</Project>