fix: #15201 RenderTagLib should be accessible if the gsp plugin is applied

[jdaugherty]

RenderTagLib should be just as accessible as ApplicationTagLib, etc. Otherwise, users have to include internal grails packages (grails-web-gsp-taglib)

[matrei]

RenderTagLib should be just as accessible as ApplicationTagLib, etc. Otherwise, users have to include internal grails packages (grails-web-gsp-taglib)

How are you using RenderTagLib, that does not work at the moment?

[jdaugherty]

I'm registering it in unit tests, and it's no longer exposed on the classpath like it was previously and like the other gsp tag libs are.

[matrei]

I'm registering it in unit tests, and it's no longer exposed on the classpath like it was previously and like the other gsp tag libs are.

Then, in my view, you are explicitly using it in your test implementation and should declare it in the testImplementation configuration.

@Taglib is a runtime retention annotation and annotated classes are not needed on the application compile classpath. The other taglibs are available only because they are in grails-gsp and grails-gsp must be on the compile classpath as it has the ControllerTagLibraryTraitInjector transformation.

I'm not going to stop this from being merged, but I think we should be restricting our dependency graphs instead of opening them up, to be able to reduce coupling going forward.

One solution would be to add grails-web-gsp-taglib as an API dependency in grails-testing-support-web (with an explaining comment).

[jdaugherty]

@matrei Let's discuss further in the weekly?