After publish, `AvaloniaResource` disappeared.

[Linlccc]

Describe the bug

When using the target framework <TargetFramework>net9.0-windows10.0.19041.0</TargetFramework>, AOT publishing will cause Avalonia resources to disappear.

Application: AvaloniaApplication1.exe 
CoreCLR Version: 9.0.10 
Description: The process was terminated due to an unhandled exception. 
Exception Info: System.IO.DirectoryNotFoundException: Could not find a part of the path 'F:\Assets\avalonia-logo.ico'. 
   at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String, FileMode, FileAccess, FileShare, FileOptions) + 0x17f 
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1) + 0x44 
   at System.IO.Strategies.OSFileStreamStrategy..ctor(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1) + 0x50 
   at System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(String, FileMode, FileAccess, FileShare, FileOptions, Int64, Nullable`1) + 0xbc 
   at System.IO.FileStream..ctor(String, FileMode, FileAccess, FileShare, Int32, FileOptions, Int64) + 0x8a 
   at Avalonia.Win32.Win32Platform.LoadIcon(String) + 0x51 
   at Avalonia.Controls.WindowIcon..ctor(String) + 0x4c 
   at AvaloniaApplication1.Views.MainWindow..ctor() + 0x4d 
   at AvaloniaApplication1.App.OnFrameworkInitializationCompleted() + 0x117 
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder, String[], Action`1) + 0x2f 
   at AvaloniaApplication1.Program.Main(String[] args) + 0x1b

After the aot publish, the assets.txt content is empty, and it will normally output the resource list at other times.

To Reproduce

1. Create an Avalonia project
2. Modify csproj

<Project Sdk="Microsoft.NET.Sdk"> 
  <PropertyGroup> 
    <OutputType>WinExe</OutputType> 
    <TargetFramework>net9.0-windows10.0.19041.0</TargetFramework> 
    <Nullable>enable</Nullable> 
    <BuiltInComInteropSupport>true</BuiltInComInteropSupport> 
    <ApplicationManifest>app.manifest</ApplicationManifest> 
    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault> 
  </PropertyGroup> 
 
  <ItemGroup> 
    <Folder Include="Models\" /> 
    <AvaloniaResource Include="Assets\**" /> 
  </ItemGroup> 
 
  <ItemGroup> 
    <PackageReference Include="Avalonia" Version="11.3.8" /> 
    <PackageReference Include="Avalonia.Desktop" Version="11.3.8" /> 
    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.8" /> 
    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.8" /> 
    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.--> 
    <PackageReference Include="Avalonia.Diagnostics" Version="11.3.8"> 
      <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets> 
      <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets> 
    </PackageReference> 
    <PackageReference Include="Avalonia.ReactiveUI" Version="11.3.8" /> 
  </ItemGroup> 
 
<PropertyGroup Condition="'$(Configuration)' == 'Release'" Label="AOT publish"> 
        <PublishAot>true</PublishAot> 
        <OptimizationPreference>Size</OptimizationPreference> 
        <StripSymbols>true</StripSymbols> 
        <PublishTrimmed>true</PublishTrimmed> 
        <TrimMode>full</TrimMode> 
        <InvariantGlobalization>true</InvariantGlobalization> 
    </PropertyGroup> 
</Project>

3. Modify App.axaml.cs (optional)

public override void OnFrameworkInitializationCompleted() 
{ 
    IEnumerable<Uri> v1 = AssetLoader.GetAssets(new Uri("avares://AvaloniaApplication1/"), null); 
    File.WriteAllLines("assets.txt", v1.Select(u => u.ToString())); 

    if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) 
    { 
        desktop.MainWindow = new MainWindow 
        { 
            DataContext = new MainWindowViewModel(), 
        }; 
    } 
 
    base.OnFrameworkInitializationCompleted(); 
}

4. Execute dotnet publish -c Release -o bin/publish
5. Run the released exe

Expected behavior

Normal packaging resources

Avalonia version

11.3.8

OS

Windows

Additional context

No response

[maxkatz6]

AvaloniaResource embeds resource into the assembly (and accessible via AssetsLoader APIs or avares:// xaml only), it won't be copied to the output with or without AOT.
If you need to copy file to the output, use standard <Content Include="" CopyToOutputDirectory="PreserveNewest" />

[Linlccc]

I don't need him to copy it to the output. The situation I'm currently facing is that he is not embedded in the program.

The following code is for accessing resources embedded in the assembly, but there is nothing inside it.

IEnumerable<Uri> v1 = AssetLoader.GetAssets(new Uri("avares://AvaloniaApplication1/"), null); 
File.WriteAllLines("assets.txt", v1.Select(u => u.ToString())); 

[maxkatz6]

Ah, sorry. It's just the exception doesn't seem to be related to this code, confused me.

[Linlccc]

The possible reasons for this exception are as follows:

1. The Icon property value of the window in the avalonia template is \Assets\avalonia-logo.ico.

2. Trying to find resources from AvaloniaResource but couldn't find them (because the resources were not packaged into the assembly).

3. Attempting to find resources from the file system (speculation).

The fundamental issue is still that the AvaloniaResource resources were not packaged into the assembly.

[maxkatz6]

I haven't debugged your repro yet, but we have running AOT applications with AvaloniaResource in them. So, it's either a recent regression, or something else is broken.

[Linlccc]

The issue should be with the target framework because problems occur with the target framework set to <TargetFramework>net9.0-windows10.0.19041.0</TargetFramework>.

But I don't know why the target framework would have an impact on this.

I feel that the issue might be with the trimming, because the published program assembly is abnormally large.