grammar org.xtext.example.mydsl.MyDsl1 with org.eclipse.xtext.common.Terminals

generate myDsl1 "http://www.xtext.org/example/mydsl/MyDsl1"

Domainmodel1 :
    (elements+=Type)*;

Type:
    'datatype' name=ID;

grammar org.xtext.example.mydsl.MyDsl2 with org.eclipse.xtext.common.Terminals

generate myDsl2 "http://www.xtext.org/example/mydsl/MyDsl2"
import "http://www.xtext.org/example/mydsl/MyDsl1" as mydsl1

Domainmodel2 :
    (features+=Feature)*;
  
Feature:
    name=ID ':' type=[mydsl1::Type];

module org.xtext.example.mydsl.GenerateMyDsl2

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

var rootPath = ".."

Workflow {
	bean = org.eclipse.emf.mwe.utils.StandaloneSetup {
		platformUri = "../.."
		scanClassPath = true
		registerGeneratedEPackage = "org.xtext.example.mydsl.myDsl1.MyDsl1Package"
		registerGenModelFile = "platform:/resource/org.xtext.example.mydsl1/model/generated/MyDsl1.genmodel"
	}

	component = XtextGenerator {
		configuration = {
			project = StandardProjectConfig {
				baseName = "org.xtext.example.mydsl2"
				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.mydsl.MyDsl2"
			fileExtensions = "mydsl2"// referencedResource = "platform:/resource/org.xtext.example.mydsl1/model/generated/MyDsl1.genmodel"
			fragment = scoping.ImportNamespacesScopingFragment2 auto-inject {}
			serializer = {
				generateStub = false
			}
			validator = {
			// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
			// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}

	}
}

$ cat types.myDsl1
datatype string
datatype integer

$ cat features.myDsl2
name : string

class MyDsl2ScopeProvider extends AbstractMyDsl2ScopeProvider {
	override getScope(EObject context, EReference reference) {
		if (context instanceof Feature) {
			if (reference == MyDsl2Package.Literals.FEATURE__TYPE) {
				val rootElement = EcoreUtil2....
				...
			}
		}
		super.getScope(context, reference)
	}
}