Correct way to make a NuGet package project with a analyzer/source generator and reference it in the same solution?

[universorum]

I have a solution with projects

MyLibrary
MyLibrary.SourceGenerator
MyConsumerLibrary

Now I want to

1. Make a NuGet package MyLibrary. It contains MyLibrary.SourceGenerator, so any project that installs the MyLibrary package will get the MyLibrary.SourceGenerator analyzer automatically.
2. Make a NuGet package MyConsumerLibrary. It needs to use MyLibrary and MyLibrary.SourceGenerator.

The problem is MyConsumerLibrary. If I set GeneratePackageOnBuild="true" in MyLibrary and install the package in MyConsumerLibrary (PackageReference), the building will fail because NuGet cannot restore the MyConsumerLibrary package (it has not been built yet).

If I get the reference using ProjectReference, MyConsumerLibrary will not get the MyLibrary.SourceGenerator analyzer.

[huoyaoyuan]

The consumer library should add a reference to the source generator, and sets output type to Analyzer. Check how unit test of System.Text.Json uses the generator:

runtime/src/libraries/System.Text.Json/tests/System.Text.Json.SourceGeneration.TestLibrary/System.Text.Json.TestLibrary.Roslyn4.4.csproj

Line 8 in c5bb20a

<ProjectReference Include="..\..\gen\System.Text.Json.SourceGeneration.Roslyn4.4.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" SetTargetFramework="TargetFramework=netstandard2.0" />

runtime/src/libraries/System.Text.Json/tests/System.Text.Json.SourceGeneration.Tests/System.Text.Json.SourceGeneration.Roslyn4.4.Tests.csproj

Lines 18 to 23 in c5bb20a

	<ItemGroup>
	<!-- The Roslyn4.4 project uses multi-targeting to enable nullability annotations,
	so we need to explicitly reference the ns2.0 TFM used by the production source generator -->
	<ProjectReference Include="..\..\gen\System.Text.Json.SourceGeneration.Roslyn4.4.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" SetTargetFramework="TargetFramework=netstandard2.0" />
	<ProjectReference Include="..\System.Text.Json.SourceGeneration.TestLibrary\System.Text.Json.TestLibrary.Roslyn4.4.csproj" />
	</ItemGroup>