Why is the "Transform all T4 Templates" not executing?

Question

I have a solution with three .NET Core 2 projects. Inside of every project I have several .tt T4 Templates.

I was searching for a smart way to transform all templates at once and found the Transform All Templates-Command.

Unfortunately the command does nothing. If I execute it in my solution, the output says:

Transforming templates for all project items.
-------------------------------------
-------------------------------------
Text templating transformation complete.

But after I check my templates, they did not update. If I go to one template file and save it, it always transforms, but only this template. I have 20 templates and do not want to go to every file seperately.

Any ideas, why the command does not work?

Cere

How are you updating those templates? They should recompile automatically each time you update through Visual Studio – Cassondracassoulet

The templates are consuming a .json File, that changes sometimes. Almost all my models depend of this .json file. If I change the .json I want all templates to re-process... – Cere

I'm suffering the same thing on a dotnetcore 2.0 project: I have 4 tt's spread over 3 projects, which generate fine when changing the tt, or right-clicking, but not when invoking "Transform All Templates" – Puppis

T4Executer does this. You can specify to run all templates before or after building your solution. – Aril

@Epsilekt this question is about the "Transform All Templates" Command, not about paying the payload compiling them on every build. David, did you ever found a solution? I have some T4 templates in classic .net and some templates in .net standard. The classic ones are compiled. The .net standard ones aren't compiled (except explicit save). – Abet

@ChristianGollhardt I understand, but that extension has a quick 'run all templates' icon on the solution explorer menu, if he keeps having this issue it could be a alternative untill this is resolved. – Aril