Error loading libgrpc on osx_arm64 with dotnet 6 when building firestore client

[palexcast]

.NET 6 will include new runtime id -- osx-arm64 -- for targeting this hardware. It refers to the macOS operating system running on Apple Silicon devices.
-- dotnet/runtime#43313

Environment details

• OS: macOS Big Sur Version 11.4 (Apple M1)
• .NET version: 6.0.100
• Package name and version: Google.Cloud.Firestore 2.4.0

Steps to reproduce

1. Install Google.Cloud.Firestore package
2. Attempt to call FirestoreDb.Create("projectId")
3. Exception thrown

Stacktrace:

Error loading native library. Not found in any of the possible locations: **/API/bin/Debug/net6.0/libgrpc_csharp_ext.arm64.dylib,/**/API/bin/Debug/net6.0/runtimes/osx-arm64/native/libgrpc_csharp_ext.arm64.dylib,**/API/bin/Debug/net6.0/../../runtimes/osx-arm64/native/libgrpc_csharp_ext.arm64.dylib
 at Grpc.Core.Internal.UnmanagedLibrary.FirstValidLibraryPath(String[] libraryPathAlternatives)
 at Grpc.Core.Internal.UnmanagedLibrary..ctor(String[] libraryPathAlternatives)
 at Grpc.Core.Internal.NativeExtension.LoadNativeMethodsUsingExplicitLoad()
 at Grpc.Core.Internal.NativeExtension.LoadNativeMethods()
 at Grpc.Core.Internal.NativeExtension..ctor()
 at Grpc.Core.Internal.NativeExtension.Get()
 at Grpc.Core.Internal.NativeMethods.Get()
 at Grpc.Core.GrpcEnvironment.GrpcNativeInit()
 at Grpc.Core.GrpcEnvironment..ctor()
 at Grpc.Core.GrpcEnvironment.AddRef()
 at Grpc.Core.Channel..ctor(String target, ChannelCredentials credentials, IEnumerable`1 options)
 at Google.Api.Gax.Grpc.GrpcCore.GrpcCoreAdapter.CreateChannelImpl(String endpoint, ChannelCredentials credentials, GrpcChannelOptions options)
 at Google.Api.Gax.Grpc.GrpcAdapter.CreateChannel(String endpoint, ChannelCredentials credentials, GrpcChannelOptions options)
 at Google.Api.Gax.Grpc.ChannelPool.GetChannel(GrpcAdapter grpcAdapter, String endpoint, GrpcChannelOptions channelOptions, ChannelCredentials credentials)
 at Google.Api.Gax.Grpc.ChannelPool.GetChannel(GrpcAdapter grpcAdapter, String endpoint, GrpcChannelOptions channelOptions)
 at Google.Api.Gax.Grpc.ClientBuilderBase`1.CreateCallInvoker()
 at Google.Cloud.Firestore.V1.FirestoreClientBuilder.BuildImpl()
 at Google.Cloud.Firestore.V1.FirestoreClientBuilder.Build()
 at Google.Cloud.Firestore.FirestoreDbBuilder.Build()
 at Google.Cloud.Firestore.FirestoreDb.Create(String projectId, FirestoreClient client)

[jskeet]

This isn't really the Firestore library, but Grpc.Core not supporting that platform.

You could request support on the grpc/grpc repo but Grpc.Core is now in maintenance mode.

In the next major version of all our libraries (expected 2022H1) we will be migrating to Grpc.Net.Client. You can manually use the Grpc.Net.Client adapter before then, however:

• Add a dependency on Google.Api.Gax.Grpc.GrpcNetClient
• Create a FirestoreDbBuilder manually, and specify the GrpcAdapter to use, as shown below

var db = new FirestoreDbBuilder
{
    ProjectId = "project-id",
    GrpcAdapter = GrpcNetClientAdapter.Default
}.Build();

Note that this is an untested scenario - we don't perform any OSX testing - but I'd expect it to just work out of the box.

[palexcast]

@jskeet Thank you for taking your time to reply with a possible solution anyway.

I can confirm that the proposed solution works, thank you!

[carlpatchett]

@jskeet

In the next major version of all our libraries (expected 2022H1) we will be migrating to Grpc.Net.Client.

Any updates on this? We are using the API's extensively throughout our tooling, and this is a problem among our M1 users. Ideally didn't want to go refactoring workaround in many places if the change is upcoming anytime soon

[jskeet]

@carlpatchett: Yes, we shipped in June 2022. So if you use Google.Cloud.Firestore version 3.0.0 for example, from .NET 6 or .NET Core 3.1, it'll use Grpc.Net.Client and should work in M1.