Implicit SourceGenerator: System.Text.Json.SourceGeneration (net 6.0)

[bernd5]

For simple Apps which have no explicit SourceGenerator and do nothing with JSON I would like to load/analyze projects as fast as possible. In roslyn workspaces is a check for sourcegenerators: https://github.com/dotnet/roslyn/blob/60a431bf454e78ae3cefc1930d356a72eaaba20c/src/Workspaces/Core/Portable/Workspace/Solution/SolutionState.CompilationTracker.cs#L1078 which is now practically always false - therefore it must be compiled all the time.

Why is it included even if the project does not refer to something related to JSON (like a hello-world app)? Please remove this implicit source generator for those projects.

[ghost]

Tagging subscribers to this area: @eiriktsarpalis, @layomia See info in area-owners.md if you want to be subscribed.

Issue Details

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For simple Apps which have no explicit SourceGenerator and do nothing with JSON I would like to load/analyze projects as fast as possible. In roslyn workspaces is a check for sourcegenerators: https://github.com/dotnet/roslyn/blob/60a431bf454e78ae3cefc1930d356a72eaaba20c/src/Workspaces/Core/Portable/Workspace/Solution/SolutionState.CompilationTracker.cs#L1078 which is now practically always false - therefore it must be compiled all the time. Why is it included even if the project does not refer to something related to JSON (like a hello-world app)? Please remove this implicit source generator for those projects.

Author:	bernd5
Assignees:	-
Labels:	`area-System.Text.Json`, `untriaged`
Milestone:	-

[eiriktsarpalis]

cc @layomia @eerhardt

[layomia]

Dup of https://github.com/dotnet/roslyn/issues/55518 - I believe we are striving to address this for net6.0 cc @eerhardt @ericstj @jaredpar