.NET 6 + $(BundleAssemblies)=True is broken

[jonpryor]

Android application type

Android for .NET (net6.0-android, etc.)

Affected platform version

VS 2022 17.2+

Description

.NET Android dropped support for $(BundleAssemblies)=True; see also:

• d236af5
• [Bug] [Android] System.IO.FileNotFoundException when <BundleAssemblies>True</BundleAssemblies> android-libraries#64 (comment)

However, this deprecation never made it to the build system. Now, if you build a .NET 6+ app with $(BundleAssemblies) set, the app is broken.

See also: https://discord.com/channels/732297728826277939/732297837953679412/1071145486695792761

The problem is likely due to: https://github.com/xamarin/xamarin-android/blob/47a1df7b6911dc30b52164766984d3ed3c4f004e/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets#L336

wherein $(AndroidUseAssemblyStore)=False when $(BundleAssemblies)=True.

We should not support $(BundleAssemblies)=True. Rather, the problems are:

• No warning is emitted to mention that $(BundleAssemblies) is not supported, and
• the resulting .apk is broken and doesn't work.

Steps to Reproduce

% dotnet new android -n android-ba
% cd android-ba
% dotnet build -p:BundleAssemblies=true
# run the app, or just look at the .apk contents
% unzip -l bin/Debug/net7.0-android/*-Signed.apk | grep assem
      660  02-03-2023 14:13   assemblies/rc.bin

Note that there is no assemblies/assemblies.blob file (c927026).

Did you find any workaround?

No response

Relevant log output

No response