<project default="showPath">
	
	<!-- Prepare our flowchart model for processing with Epsilon --> 
	<target name="loadFlowchartModel">
		<epsilon.emf.register file="../org.eclipse.epsilon.examples.metamodels/Flowchart.ecore" />
		<epsilon.emf.loadModel
			name="Flowchart"
			read="true"
			store="false"
			metamodeluri="flowchart"
			modelfile="models/wakeup.model"
		/>
	</target>
	
	<!-- First check that our flowchart is well-formed -->
	<target name="validate" depends="loadFlowchartModel">
		<!-- Note that this task will fail if the model is not valid due to the failonerrors=true
		     attribute. To see how an invalid model causes a failure, try changing 
		     modelfile="models/wakeup.model" to modelfile="models/invalid.model" on line 11
		  -->
		<epsilon.evl src="programs/validate_flowchart.evl" failonerrors="true">
			<model ref="Flowchart" />
		</epsilon.evl>
	</target>
	
	<!-- Next prepare a new and empty path model for use in the EOL and EGL scripts -->
	<target name="loadPathModel">
		<epsilon.emf.register file="metamodel/path.ecore" />
		<epsilon.emf.loadModel
			name="FlowchartPath"
			read="false"
			store="false"
			metamodeluri="path"
			modelfile="models/path.model"
		/>
	</target>
	
	<!-- Invoke EOL to select a path through the flowchart, and then
	     invoke EGL to transform the chosen path to HTML -->
	<target name="showPath" depends="validate,loadPathModel">
		<epsilon.eol src="programs/choose_path.eol">
			<model ref="Flowchart" />
			<model ref="FlowchartPath" />
		</epsilon.eol>
		
		<!-- Save the generated HTML in path.html -->
		<epsilon.egl src="programs/path_to_html.egl" target="path.html">
			<model ref="FlowchartPath" />
		</epsilon.egl>
		
		<!-- Force Eclipse to refresh our project so we can see the newly generated path.html file -->
		<eclipse.refreshLocal resource="org.eclipse.epsilon.examples.workflow.flowchart" depth="-1" />
	</target>
</project>