Error in the dsl file does not produce helpful message when ALE validator fails

[dvojtise]

in the dsl file when there is some issue that makes the validator fails
for example trying to use multiple ecore files, or simply if the referenced ecore file doesn't exist (or if the target project is closed)
then the only error we get is Error executing EValidator in the Problem view without any further information.

[dvojtise]

Actually, more information is present in the error log view

however, it would be helpful to grab it and put it in the marker

[echebbi]

For the record, this is related to eclipse-gemoc/gemoc-studio#161

[dvojtise]

If the .dsl file use the "metaprog" declaration as defined in eclipse-gemoc/gemoc-studio-modeldebugging#164 (and some following PRs) the dsl editor provided by GEMOC will help
Note: the dsl editor provided by GEMOC is not the same as the default editor provided by ALE (this one is only a java property file editor without any enhancement or completion)

[echebbi]

Since the org.eclipse.gemoc.gemoc_language_workbench.metaprog extension point is currently tighly coupled to the GEMOC Studio I'd prefer to provide an extension in the gemoc-studio-execution-ale repository rather than in ale-lang itself.

[dvojtise]

Thanks to @Kairides, it already exists in GEMOC Studio since eclipse-gemoc/gemoc-studio-execution-ale#34 😉