Two-stage logging

src/GuiApp/Avalonia/FileTime.GuiApp.App/Program.cs

@@ -1,9 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.IO;
 using System.Reflection;
 using Avalonia;
 using Avalonia.ReactiveUI;
+using Serilog;
+using Serilog.Debugging;
 
 namespace FileTime.GuiApp.App;
 
@@ -19,51 +22,87 @@ public static class Program
 #else
         InitRelease();
 #endif
+        InitLogging();
+        
+        Log.Logger.Information("Early app starting...");
+    }
 
-        void InitDevelopment()
+    private static void InitDevelopment()
+    {
+        EnvironmentName = "Development";
+
+        AppDataRoot = Path.Combine(Environment.CurrentDirectory, "appdata");
+    }
+
+    private static void InitRelease()
+    {
+        EnvironmentName = "Release";
+
+        var possibleDataRootsPaths = new List<string>
         {
-            EnvironmentName = "Development";
+            Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "FileTime"),
+            Path.Combine(Assembly.GetEntryAssembly()?.Location ?? ".", "fallbackDataRoot")
+        };
 
-            AppDataRoot = Path.Combine(Environment.CurrentDirectory, "appdata");
-        }
-
-        void InitRelease()
+        string? appDataRoot = null;
+        foreach (var possibleAppDataRoot in possibleDataRootsPaths)
         {
-            EnvironmentName = "Release";
-
-            var possibleDataRootsPaths = new List<string>()
+            try
             {
-                Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "FileTime"),
-                Path.Combine(Assembly.GetEntryAssembly()?.Location ?? ".", "fallbackDataRoot")
-            };
+                var appDataRootDirectory = new DirectoryInfo(possibleAppDataRoot);
+                if (!appDataRootDirectory.Exists) appDataRootDirectory.Create();
 
-            string? appDataRoot = null;
-            foreach (var possibleAppDataRoot in possibleDataRootsPaths)
-            {
-                try
-                {
-                    var appDataRootDirectory = new DirectoryInfo(possibleAppDataRoot);
-                    if (!appDataRootDirectory.Exists) appDataRootDirectory.Create();
-
-                    //TODO write test
-                    appDataRoot = possibleAppDataRoot;
-                    break;
-                }
-                catch
-                {
-                }
+                //TODO write test
+                appDataRoot = possibleAppDataRoot;
+                break;
+            }
+            catch
+            {
             }
-
-            AppDataRoot = appDataRoot ?? throw new UnauthorizedAccessException();
         }
+
+        AppDataRoot = appDataRoot ?? throw new UnauthorizedAccessException();
+    }
+
+    private static void InitLogging()
+    {
+        SelfLog.Enable(l => Debug.WriteLine(l));
+
+        var logFolder = Path.Combine(AppDataRoot, "logs", "bootstrap");
+
+        if (!Directory.Exists(logFolder)) Directory.CreateDirectory(logFolder);
+        
+        Log.Logger = new LoggerConfiguration()
+            .MinimumLevel.Verbose()
+            .Enrich.FromLogContext()
+            .WriteTo.File(
+                Path.Combine(logFolder, "appLog.log"),
+                fileSizeLimitBytes: 10 * 1024 * 1024,
+                rollOnFileSizeLimit: true,
+                rollingInterval: RollingInterval.Day)
+            .CreateBootstrapLogger();
     }
 
     // Initialization code. Don't use any Avalonia, third-party APIs or any
     // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
     // yet and stuff might break.
     [STAThread]
-    public static void Main(string[] args) => BuildAvaloniaApp()
-        .StartWithClassicDesktopLifetime(args);
+    public static void Main(string[] args)
+    {
+        try
+        {
+            BuildAvaloniaApp()
+                .StartWithClassicDesktopLifetime(args);
+        }
+        catch (Exception ex)
+        {
+            Log.Fatal(ex, "An unhandled exception occured during bootstrapping");
+        }
+        finally
+        {
+            Log.CloseAndFlush();
+        }
+    }
 
     // Avalonia configuration, don't remove; also used by visual designer.
     public static AppBuilder BuildAvaloniaApp()