Unable to run an empty Avalonia .NET app from source using `dotnet run`

lostmsu commented 3 days ago

Describe the bug

The app fails to start with

Unhandled exception. System.TypeInitializationException: The type initializer for 'SkiaSharp.SKImageInfo' threw an exception.
 ---> System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable: 
libfontconfig.so.1: cannot open shared object file: No such file or directory
/nix/store/857lb4p516avw491s8i5pzglwrki8n36-dotnet-sdk-8.0.300/shared/Microsoft.NETCore.App/8.0.5/libSkiaSharp.so: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/libSkiaSharp.so: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/runtimes/linux-x64/native/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/nix/store/857lb4p516avw491s8i5pzglwrki8n36-dotnet-sdk-8.0.300/shared/Microsoft.NETCore.App/8.0.5/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/runtimes/linux-x64/native/libSkiaSharp: cannot open shared object file: No such file or directory
/nix/store/857lb4p516avw491s8i5pzglwrki8n36-dotnet-sdk-8.0.300/shared/Microsoft.NETCore.App/8.0.5/libSkiaSharp: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/libSkiaSharp: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/runtimes/linux-x64/native/liblibSkiaSharp: cannot open shared object file: No such file or directory
/nix/store/857lb4p516avw491s8i5pzglwrki8n36-dotnet-sdk-8.0.300/shared/Microsoft.NETCore.App/8.0.5/liblibSkiaSharp: cannot open shared object file: No such file or directory
/home/X/Projects/Env/Forever/Viewer/bin/Debug/net8.0/liblibSkiaSharp: cannot open shared object file: No such file or directory

   at SkiaSharp.SkiaApi.sk_colortype_get_default_8888()
   at SkiaSharp.SKImageInfo..cctor()
   --- End of inner exception stack trace ---
   at Avalonia.Skia.PlatformRenderInterface..ctor(Nullable`1 maxResourceBytes)
   at Avalonia.Skia.SkiaPlatform.Initialize(SkiaOptions options)
   at Avalonia.SkiaApplicationExtensions.<>c.<UseSkia>b__0_0()
   at Avalonia.AppBuilder.SetupUnsafe()
   at Avalonia.AppBuilder.Setup()
   at Avalonia.AppBuilder.SetupWithLifetime(IApplicationLifetime lifetime)
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder builder, String[] args, Action`1 lifetimeBuilder)

Steps To Reproduce

Steps to reproduce the behavior:

install dotnetCorePackages.sdk_8_0
dotnet new install "Avalonia.Templates"
dotnet new avalonia.app -o MyApp
in MyApp/ do dotnet run

Expected behavior

The app should start

Additional context

The default template pulls SkiaSharp.NativeAssets.Linux package, which has libSkiaSharp.so. It ends up in bin/Debug/net8.0/runtimes/linux-x64/native/libSkiaSharp.so, but can not be loaded.

Not quite sure what exactly is going on, as installing fontconfig NixOS package did not resolve the error at the top (libfontconfig.so.1: cannot open shared object file: No such file or directory). I suspect for a descent experience all native dependencies from NuGet need to be patched on download (might break building for other Linuxes) or on build (when bin/Debug is created).

EXTRA: the issue also reproduces with dotnet publish followed by dotnet MyApp.dll from publish/ output directory.

Notify maintainers

@kuznero @mdarocha

Metadata

 - system: `"x86_64-linux"`
 - host os: `Linux 6.6.57, NixOS, 24.05 (Uakari), 24.05.5809.4eb33fe664af`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.8`
 - channels(root): `"home-manager-24.05.tar.gz, nixos-24.05"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Add a :+1: reaction to issues you find important.

AlienJust commented 3 days ago

Hi, Avalonia depends on some libs. You can use nix develop command with flake.nix like this:

{
  description = "A Nix-flake-based C# development environment";

  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";

  outputs = {
    self,
    nixpkgs,
  }: let
    supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
    forEachSupportedSystem = f:
      nixpkgs.lib.genAttrs supportedSystems (system:
        f {
          pkgs = import nixpkgs {inherit system;};
        });
  in {
    devShells = forEachSupportedSystem ({pkgs}: {
      default = pkgs.mkShell {
        packages = with pkgs; [
          #dotnet-sdk_6
          #dotnet-sdk_7
          #dotnet-sdk_8
          (with dotnetCorePackages;
            combinePackages [
              sdk_6_0
              sdk_7_0
              sdk_8_0
            ])
          omnisharp-roslyn
          mono
          msbuild
          (pkgs.buildFHSEnv {
            name = "avalonia-fhs-shell";
            targetPkgs = pkgs:
              with pkgs;
                [
                  udev
                  alsa-lib
                  fontconfig
                  glew
                ]
                ++ (with pkgs.xorg; [
                  # Avalonia UI
                  libX11
                  libICE
                  libSM
                  libXi
                  libXcursor
                  libXext
                  libXrandr
                ]);
            #runScript = "zsh"; # same colors scheme of zsh confusing me
          })
        ];
      };
    });
  };
}

then enter shell: avalonia-fhs-shell then run: dotnet run

AlienJust commented 3 days ago

There also ILSpy.Avalonia package in nixpkgs See: https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/misc/avalonia-ilspy/default.nix#L51

Upd. And even Avalonia 11 o_O https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/by-name/av/avalonia/package.nix

AlienJust commented 2 days ago

Or if You don't use flakes, then create file shell.nix:

{ pkgs ? import <nixpkgs> {} }:

(pkgs.buildFHSEnv {
  name = "simple-x11-env";
  targetPkgs = pkgs: (with pkgs; [
    udev
    alsa-lib
    fontconfig
    glew
  ]) ++ (with pkgs.xorg; [
    # Avalonia UI
    libX11
    libICE
    libSM
    libXi
    libXcursor
    libXext
    libXrandr
  ]);
  multiPkgs = pkgs: (with pkgs; [
    udev
    alsa-lib
  ]);
  runScript = "bash";
}).env

then run nix-shell shell.nix before dotnet-run

NixOS / nixpkgs