Mwe2Launcher.main(new String[]{"path/to/file.mwe2"});

0    [main] INFO  text.xtext.generator.XtextGenerator  - Initializing Xtext generator
8    [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Adding generated EPackage 'org.eclipse.xtext.common.types.TypesPackage'
68   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.webdsl at 'file:/Users/valent0ne/Projects/EclipseWorkspace/org.xtext.webdsl.parent/org.xtext.webdsl/'
68   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.webdsl.tests at 'file:/Users/valent0ne/Projects/EclipseWorkspace/org.xtext.webdsl.parent/org.xtext.webdsl.tests/'
69   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.webdsl.ide at 'file:/Users/valent0ne/Projects/EclipseWorkspace/org.xtext.webdsl.parent/org.xtext.webdsl.ide/'
69   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.webdsl.ui at 'file:/Users/valent0ne/Projects/EclipseWorkspace/org.xtext.webdsl.parent/org.xtext.webdsl.ui/'
69   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.webdsl.ui.tests at 'file:/Users/valent0ne/Projects/EclipseWorkspace/org.xtext.webdsl.parent/org.xtext.webdsl.ui.tests/'
69   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.webdsl.web at 'file:/Users/valent0ne/Projects/EclipseWorkspace/org.xtext.webdsl.parent/org.xtext.webdsl.web/'
78   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Using resourceSet registry. The registered Packages will not be registered in the global EPackage.Registry.INSTANCE!
100  [main] ERROR mf.mwe2.launch.runtime.Mwe2Launcher  - Problems running workflow org.xtext.webdsl.GenerateWebDsl: java.io.IOException: The path '/org.eclipse.xtext.xbase/model/Xbase.genmodel' is unmapped
java.lang.RuntimeException: Problems running workflow org.xtext.webdsl.GenerateWebDsl: java.io.IOException: The path '/org.eclipse.xtext.xbase/model/Xbase.genmodel' is unmapped
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:104)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
...

module org.xtext.webdsl.GenerateWebDsl

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.webdsl"
				rootPath = rootPath
				runtimeTest = {
					enabled = true
				}
				eclipsePlugin = {
					enabled = true
				}
				eclipsePluginTest = {
					enabled = true
				}
				web = {
					enabled = true
				}
				createEclipseMetaData = true
			}
			code = {
				encoding = "UTF-8"
				lineDelimiter = "\n"
				fileHeader = "/*\n * generated by Xtext \${version}\n */"
			}
		}
		language = StandardLanguage {
			name = "org.xtext.webdsl.WebDsl"
			fileExtensions = "webdsl"
            
			serializer = {
				generateStub = false
			}
			validator = {
				composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
			}
		}
	}
}