[mdt-papyrus.dev] Xtext 2.8 forward incompatibility

[Ed Willink <ed@xxxxxxxxxxxxx>]

Hi

Are you aware that Xtext 2.8 introduces a breaking forward 
incompatibility by renaming its "...ui..." plugins that are referenced 
by auto-generated code to "...ide..." plugins that are not available in 
Xtext 2.7 and earlier?

This is causing me considerable concern for OCL since for Luna I ensured 
that the Luna release was viable for Juno and Kepler.

In https://bugs.eclipse.org/bugs/show_bug.cgi?id=460552, I have found 
that a QVT editor developed using Xtext 2.8 cannot be installed as an 
extension of the OCL editor developed using Xtext 2.6/2.7. I have fixed 
the incompatibility by some simple automated package/class name edits. 
This works for now but I'm not sure how long it will be before something 
less easy to correct appears.

An alternative, if Papyrus wants to avoid being tightly coupled to 
Xtext, may be to freeze at Xtext 2.7.3 for editor development and hope 
that future Xtext run-times have backward compatibility.

    Regards

        Ed Willink