Build of MAUI app fails if NuGet package contains references

[AntonKosenkoPro]

Description

We want to hide our private libraries from IntelliSense for our customers. We followed the instructions from the following guide: Multiple assemblies in one package. This solution works in pure net7.0 apps, but leads to build errors on MAUI apps.

Steps to Reproduce

I prepared a sample repo to demonstrate this issue: https://github.com/AntonKosenkoDX/nuget-refs.

To build this project, please run the build script or execute the following commands:

dotnet build MyUtilities/MyUtilities.csproj
dotnet build MyLib/MyLib.csproj
nuget pack MyNuget/MyNuget.nuspec -OutputDirectory MyNuget/

dotnet build MyApp/MyApp.csproj
dotnet build MyConsoleApp/MyConsoleApp.csproj

You will see that the pure NET7 project is built without errors and it's IntelliSense shows only members from MyLib. Members from MyUtilities are not shown. This behavior is expected.

However, an attempt to build MyApp (MAUI application) results with the following error:

 error XAGJS7028: System.IO.FileNotFoundException: Could not load assembly 'MyUtilities, Version=1.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile? 

Link to public reproduction project repository

https://github.com/AntonKosenkoDX/nuget-refs

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

All

Did you find any workaround?

No

Relevant log output

/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028: System.IO.FileNotFoundException: Could not load assembly 'MyUtilities, Version=1.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile? [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028: File name: 'MyUtilities.dll' [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/DirectoryAssemblyResolver.cs:line 245 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/DirectoryAssemblyResolver.cs:line 191 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Mono.Cecil.MetadataResolver.Resolve(TypeReference type) in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/cecil/Mono.Cecil/MetadataResolver.cs:line 110 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Mono.Cecil.ModuleDefinition.Resolve(TypeReference type) in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/cecil/Mono.Cecil/ModuleDefinition.cs:line 762 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Mono.Cecil.TypeReference.Resolve() in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/cecil/Mono.Cecil/TypeReference.cs:line 278 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.Cecil.TypeDefinitionCache.Resolve(TypeReference typeReference) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/TypeDefinitionCache.cs:line 20 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.Cecil.TypeDefinitionRocks.GetBaseType(TypeDefinition type, IMetadataResolver resolver) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/TypeDefinitionRocks.cs:line 23 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.Cecil.TypeDefinitionRocks.GetTypeAndBaseTypes(TypeDefinition type, IMetadataResolver resolver)+MoveNext() in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/TypeDefinitionRocks.cs:line 40 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.Cecil.TypeDefinitionRocks.IsSubclassOf(TypeDefinition type, String typeName, IMetadataResolver resolver) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/TypeDefinitionRocks.cs:line 94 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.JavaCallableWrappers.JavaTypeScanner.AddJavaTypes(List`1 javaTypes, TypeDefinition type) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.JavaCallableWrappers/Java.Interop.Tools.JavaCallableWrappers/JavaTypeScanner.cs:line 58 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Java.Interop.Tools.JavaCallableWrappers.JavaTypeScanner.GetJavaTypes(IEnumerable`1 assemblies, IAssemblyResolver resolver) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop.Tools.JavaCallableWrappers/Java.Interop.Tools.JavaCallableWrappers/JavaTypeScanner.cs:line 48 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Xamarin.Android.Tasks.GenerateJavaStubs.Run(DirectoryAssemblyResolver res) [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Xamarin.Android.Tasks.GenerateJavaStubs.RunTask() [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]
/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.4/tools/Xamarin.Android.Common.targets(1476,3): error XAGJS7028:    at Microsoft.Android.Build.Tasks.AndroidTask.Execute() in /Users/runner/work/1/s/xamarin-android/external/xamarin-android-tools/src/Microsoft.Android.Build.BaseTasks/AndroidTask.cs:line 17 [/Users/antonkosenko/work/nuget-refs/MyApp/MyApp.csproj::TargetFramework=net7.0-android]

[jsuarezruiz]

cc @jonathanpeppers

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[jonathanpeppers]

Can you share the .nupkg files you created in the example above? (Or at least just list the file contents)

Also an MSBuild diagnostic log would help us look into the error message. Thanks!

Hi @AntonKosenkoDX. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[AntonKosenkoPro]

Hello @jonathanpeppers! Thanks for fast response.
I've added .nupkg file here:
https://github.com/AntonKosenkoDX/nuget-refs/tree/main/MyNuget
And diagnostic log here:
https://github.com/AntonKosenkoDX/nuget-refs/blob/main/MyApp/msbuild-diagnostic.log

Hope it helps.

[jonathanpeppers]

Hmm, how did you end up with:

Does the problem go away with TargetFramework=net7.0-android33??? That should actually be the default value, but 31 is in your package.

[AntonKosenkoPro]

I've just tried to up target version to android33 and the error still appears(
And.. Are you able to reproduce this issue on your side? I'm getting the error pretty stable with the sample that I prepared - https://github.com/AntonKosenkoDX/nuget-refs.

[AntonKosenkoPro]

@jonathanpeppers ?