* [src] Build the .NET version of our product assemblies using a .NET 5 BCL.
We're not shipping the .NET product assemblies in any stable release, so we
can use a preview version of the .NET 5 BCL.
Also:
* Add all the nuget feeds we need to the top-level NuGet.config, even for .NET
5/6, there shouldn't be any conflicts with stable feeds since we use exact
version numbers.
* Generate a top-level global5.json which is copied to every directory that
needs a .NET 5 global.json (overriding the .NET 3.1 global.json in the root
directory).
* Use the expected dotnet binary during our local build.
* [tests] Fix the bgen tests to use .NET 5.
* [xharness] Set the current directory to the project directory when running .NET tests.
This way we end up using the dotnet version that's configured in global.json for the tests.
Put NuGet packages in tests/dotnet, instead of a directory next to the project
file, so that default item inclusions / globs don't pick up anything from
them.
This fixes an issue where the build would pick up a Program.cs that ships with NUnitLite,
and include it in the build, which would then cause build failures because that Program.cs
has a Main method, which would conflict with our Main method.
This avoids a possible difference in behavior, because in our system
dependency check we verify that the system has a specific version (which might
succeed), but if we don't pick a specific dotnet version in global.json,
dotnet will pick the latest version, which may behave differently than the one
we have in Make.config.
Thus always use the exact same version, so that we don't run into a difference
in behavior between developers and/or bots.
Also add another nuget source to get Mono's net5 runtime packs.
This makes the tests/dotnet/MySingleView test app:
* Compile managed code successfully, referencing Xamarin.iOS.dll.
* Resolve the correct targeting and runtime packs (aka Mono).
The compiled result is not put into an .app bundle as iOS expects, so the
result isn't actually executable.
Also add a very simple net5 test app (which doesn't build yet).
Current (expected) build result:
> xamarin-macios/tests/dotnet/MySingleView $ dotnet build
Microsoft (R) Build Engine version 16.7.0-preview-20258-02+26f6d1d87 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.
Determining projects to restore...
xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj : error NU1102: Unable to find package Microsoft.NETCore.App.Runtime.ios-x64 with version (= 5.0.0-preview.6.20264.1)
xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj : error NU1102: - Found 1 version(s) in nuget.org [ Nearest version: 5.0.0-preview.4.20251.6 ]
xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj : error NU1102: - Found 1 version(s) in Nuget Official [ Nearest version: 5.0.0-preview.4.20251.6 ]
xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj : error NU1102: - Found 0 version(s) in local-dotnet-feed
xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj : error NU1102: - Found 0 version(s) in Dotnet arcade
Failed to restore xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj (in 951 ms).
This fails because the .NET build logic isn't being told that it should look
for the mono runtime packs instead of the .NET Core runtime packs.
Rolf Bjarne Kvinge