* Added 'BUTRLoader_lasterror.log' file that will contain the error w…

…hen the launcher is crashing

build/common.props

@@ -7,7 +7,7 @@
 
   <!--Development Variables-->
   <PropertyGroup>
-    <Version>1.14.4</Version>
+    <Version>1.14.5</Version>
     <HarmonyVersion>2.2.2</HarmonyVersion>
     <BUTRSharedVersion>3.0.0.126</BUTRSharedVersion>
     <BUTRModuleManagerVersion>5.0.163</BUTRModuleManagerVersion>

changelog.txt

@@ -1,4 +1,8 @@
 ---------------------------------------------------------------------------------------------------
+Version: 1.14.5
+Game Versions: v1.0.0,v1.0.1,v1.0.2
+* Added 'BUTRLoader_lasterror.log' file that will contain the error when the launcher is crashing
+---------------------------------------------------------------------------------------------------
 Version: 1.14.4
 Game Versions: v1.0.0,v1.0.1,v1.0.2
 * Added support for loading Novus Presets

src/Bannerlord.BUTRLoader.AssemblyManager/BUTRLoaderAppDomainManager.cs

@@ -8,6 +8,7 @@
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Runtime.CompilerServices;
+using System.Text;
 
 [assembly: InternalsVisibleTo("Bannerlord.BUTRLoader.Tests")]
 
@@ -23,6 +24,8 @@ public override void InitializeNewDomain(AppDomainSetup appDomainInfo)
         {
             base.InitializeNewDomain(appDomainInfo);
 
+            AppDomain.CurrentDomain.UnhandledException += CurrentDomainOnUnhandledException;
+
             // delete old files
             var files = new[]
             {
@@ -62,9 +65,29 @@ public override void InitializeNewDomain(AppDomainSetup appDomainInfo)
             };
         }
 
+        private static void CurrentDomainOnUnhandledException(object sender, UnhandledExceptionEventArgs e)
+        {
+            static string GetRecursiveException(Exception ex) => new StringBuilder()
+                .AppendLine()
+                .AppendLine($"Type: {ex.GetType().FullName}")
+                .AppendLine(!string.IsNullOrWhiteSpace(ex.Message) ? $"Message: {ex.Message}" : string.Empty)
+                .AppendLine(!string.IsNullOrWhiteSpace(ex.Source) ? $"Source: {ex.Source}" : string.Empty)
+                .AppendLine(!string.IsNullOrWhiteSpace(ex.StackTrace) ? $@"CallStack:{Environment.NewLine}{string.Join(Environment.NewLine, ex.StackTrace.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries))}" : string.Empty)
+                .AppendLine(ex.InnerException != null ? $@"{Environment.NewLine}{Environment.NewLine}Inner {GetRecursiveException(ex.InnerException)}" : string.Empty)
+                .ToString();
+
+            using var fs = File.Open("BUTRLoader_lasterror.log", FileMode.OpenOrCreate, FileAccess.Write);
+            fs.SetLength(0);
+            using var writer = new StreamWriter(fs);
+            writer.Write($@"BUTRLoader Exception:
+Version: {typeof(BUTRLoaderAppDomainManager).Assembly.GetName().Version}
+{(e.ExceptionObject is Exception ex ? GetRecursiveException(ex) : e.ToString())}");
+        }
+
 
         private static void Initialize()
         {
+            Manager.OnDisable += () => AppDomain.CurrentDomain.UnhandledException -= CurrentDomainOnUnhandledException;
             Manager.Initialize();
 
             InterceptorFeature.Enable(_featureHarmony);

src/Bannerlord.BUTRLoader.LauncherEx/Manager.cs

@@ -16,6 +16,8 @@ public static class Manager
         internal static readonly Harmony _launcherHarmony = new("bannerlord.butrloader.launcherex");
         internal static readonly AssemblyCompatibilityChecker _compatibilityChecker = new();
 
+        public static event Action OnDisable;
+
         public static void Initialize()
         {
             AssemblyLoaderPatch.Enable(_launcherHarmony);
@@ -85,6 +87,7 @@ static byte[] ReadFully(Stream input)
 
         public static void Disable()
         {
+            OnDisable?.Invoke();
             _compatibilityChecker.Dispose();
             _launcherHarmony.UnpatchAll(_launcherHarmony.Id);
         }