AfterTargets build reason not shown

[JanKrivanek]

Description

The AfterTagets build reason is not being shown:

msbuild.zip

This seems to be quite consistent so I guess it's probably not an unexpected bug? But for some reason I haven't found similar feature request here

[KirillOsenkov]

All we get is a ParentTarget, which is null for Target4:
https://github.com/dotnet/msbuild/blob/cd64b7b4a690d809cf14fe2af807a328cce04e54/src/Framework/TargetStartedEventArgs.cs#L158

I'm guessing MSBuild should be setting ParentTarget to Target1 in this repro.

[KirillOsenkov]

And here's the logic that calculates the tooltip based on ParentTarget and TargetBuiltReason:

MSBuildStructuredLog/src/StructuredLogger/ObjectModel/Target.cs

Lines 24 to 47 in 4116c37

	if (string.IsNullOrEmpty(ParentTarget))
	{
	return string.Empty;
	}
	if (OriginalNode != null)
	{
	return "Navigate to where the target was built originally";
	}
	if (TargetBuiltReason == TargetBuiltReason.None)
	{
	return $"{Name} was built because of {ParentTarget}";
	}
	var cause = TargetBuiltReason switch
	{
	TargetBuiltReason.AfterTargets => $"Target '{Name}' had AfterTargets='{ParentTarget}' directly or indirectly",
	TargetBuiltReason.BeforeTargets => $"Target '{Name}' had BeforeTargets='{ParentTarget}'",
	TargetBuiltReason.DependsOn => $"Target '{ParentTarget}' had DependsOnTargets='{Name}'",
	_ => ""
	};
	return cause;