Xtext crossreferencing no longer working?

Question

I have used Xtext for many years, and have always been able to cross-reference from one grammar to another grammar. But today, on Eclipse Photon, the usual method no longer works.

In the same workspace, I create two Xtext projects, using default options, org.xtext.example.adsl.ADsl

grammar org.xtext.example.adsl.ADsl with org.eclipse.xtext.common.Terminals

generate aDsl "http://www.xtext.org/example/adsl/ADsl"

AModel:
    agreetings+=AGreeting*;

AGreeting:
    'AHello' name=ID '!';

and org.xtext.example.bdsl.BDsl,

grammar org.xtext.example.bdsl.BDsl with org.eclipse.xtext.common.Terminals

generate bDsl "http://www.xtext.org/example/bdsl/BDsl"


//import "http://www.xtext.org/example/adsl/ADsl" as adsl

ModelB:
    bgreetings+=BGreeting*;

BGreeting:
    'BHello' name=ID '!';

where BDsl would like to import ADsl via the commented-out import statement import "http://www.xtext.org/example/adsl/ADsl" as adsl for use in cross-referencing.

In the past, before uncommenting that import, I would have to add a resource reference referencedResource = "../org.xtext.example.adsl/model/generated/ADsl.genmodel" to GenerateBDsl.mwe2.

module org.xtext.example.bdsl.GenerateBDsl

import org.eclipse.xtext.xtext.generator.*
import org.eclipse.xtext.xtext.generator.model.project.*

var rootPath = ".."

Workflow {

    component = XtextGenerator {
        configuration = {
            project = StandardProjectConfig {
                baseName = "org.xtext.example.bdsl"
                rootPath = rootPath
                runtimeTest = {
                    enabled = true
                }
                eclipsePlugin = {
                    enabled = true
                }
                eclipsePluginTest = {
                    enabled = true
                }
                createEclipseMetaData = true
            }
            code = {
                encoding = "UTF-8"
                lineDelimiter = "\n"
                fileHeader = "/*\n * generated by Xtext \${version}\n */"
            }
        }
        language = StandardLanguage {
            name = "org.xtext.example.bdsl.BDsl"


            referencedResource = "../org.xtext.example.adsl/model/generated/ADsl.genmodel"


            fileExtensions = "bdsl"

            serializer = {
                generateStub = false
            }
            validator = {
                // composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
            }
        }
    }
}

But when I generate the Xtext artifacts for BDsl, I now get the following error (the import still commented out).

434  [main] ERROR xt.generator.XtextGeneratorLanguage  - Error loading 'ADsl.ecore'

The genmodel is certainly being found, since a completely different error is generated if the file cannot be found.

What is going on?

• Am I making some stupid error?
• Is this related to this bug? If so, is there a work around?

[... I am aware that the example contains no actual cross-references. I have purposely induced the error in the simplest possible manner. ...]

Answer 1

make sure you refer to the referenced genmodel in a way that it actually can be insolved. the ususal reference would look like platform:/resource/project/model/Some.genmodel so in your case referencedResource = "platform:/resource/org.xtext.example.adsl/model/generated/ADsl.genmodel"