SingleFileGenerator only works for old-style projects, not for SDK projects

[peter-sabath]

Installed products

Visual Studio 2022 Community

Description

I have a SingleFile generator that works fine for old-style projects, but does not get executed for SDK-style projects (.NET 8)
The package has those CodeGenerator-related attributes:

[ProvideCodeGenerator(typeof(BuildTextConsts), BuildTextConsts.Name, BuildTextConsts.cCustomToolDescription, true, ProjectSystem = ProvideCodeGeneratorAttribute.CSharpProjectGuid, RegisterCodeBase = true)] [ProvideCodeGeneratorExtension(BuildTextConsts.Name, BuildTextConsts.cDefaultExtension)]

I also added the custom command from your Single-File Generator example to add/set the custom build tool entry.
The command gets executed for both project styles, but the generator is only used for old-style projects.

As the availability is only declared via Attributes I have no idea how to debug this and find a reason why it does not work for SDK-style projects.

Because the SDK style projects are projects that were migrated from older when migrating from .NET Framework to .NET 8 I also tried it with clean, empty projects of both styles with the same result.

Expected behavior

Should work with both types of projects