Small adjustment in order to make the flag available as CLI option.

src/main/java/de/monticore/lang/monticar/mpp/core/generator/GeneratorHelper.java

@@ -4,6 +4,7 @@ import com.google.common.eventbus.Subscribe;
 import de.monticore.lang.math._ast.ASTMathCompilationUnit;
 import de.monticore.lang.math._ast.ASTMathScript;
 import de.monticore.lang.monticar.mpp.core.events.EventsService;
+import de.monticore.lang.monticar.mpp.core.options.OptionsParsedEvent;
 import de.monticore.lang.monticar.mpp.core.options.OptionsService;
 import de.monticore.lang.monticar.mpp.core.parser.MathFileParsedEvent;
 import de.monticore.lang.monticar.mpp.core.tex.SVGGenerator;
@@ -32,7 +33,7 @@ public class GeneratorHelper {
 
         this.svggenerator = new SVGGenerator(this.optionsService);
         this.htmlPrinter = new HTMLMathPrettyPrinter();
-        this.texPrinter = new TeXHTMLMathPrettyPrinter(svggenerator);
+        this.texPrinter = new TeXHTMLMathPrettyPrinter(this.svggenerator);
 
         this.nodes = new ArrayList<>();
 
@@ -82,4 +83,12 @@ public class GeneratorHelper {
     public void onMathFileParsed(MathFileParsedEvent event) {
         this.nodes.add(event.ast);
     }
+
+    @Subscribe
+    public void onOptionsParsed(OptionsParsedEvent event) {
+        boolean isInternal = this.optionsService.isInternal();
+
+        this.texPrinter.setInternal(isInternal);
+        this.htmlPrinter.setInternal(isInternal);
+    }
 }

src/main/java/de/monticore/lang/monticar/mpp/core/options/OptionsService.java

@@ -17,6 +17,7 @@ public class OptionsService {
 
     protected Path modelPath;
     protected Path outputPath;
+    protected boolean internal;
 
     public OptionsService(EventsService eventsService) {
         this.eventsService = eventsService;
@@ -31,6 +32,8 @@ public class OptionsService {
                 "Absolute Path to the package root of the models.");
         this.options.addOption("out", "output-path", true,
                 "Absolute Path to the root directory of the output.");
+        this.options.addOption("i", "internal", false,
+                "If set, runs the application in internal mode.");
     }
 
     public Path getModelPath() {
@@ -49,6 +52,9 @@ public class OptionsService {
         return this.outputPath.resolve(relativePath);
     }
 
+    public boolean isInternal() {
+        return this.internal;
+    }
 
     @Subscribe
     public void onApplicationConfigure(ApplicationConfigureEvent event) throws ParseException {
@@ -60,6 +66,7 @@ public class OptionsService {
 
         this.modelPath = Paths.get(modelPath);
         this.outputPath = Paths.get(outputPath);
+        this.internal = commandLine.hasOption("i");
 
         OptionsParsedEvent optionsEvent = new OptionsParsedEvent(this.modelPath, this.outputPath);
 

src/main/java/de/monticore/lang/monticar/mpp/montimath/MathPrettyPrinter.java

@@ -29,7 +29,7 @@ public class MathPrettyPrinter implements AstPrettyPrinter<ASTMathCompilationUni
     protected boolean inMatrixEnvironment;
     protected boolean internal;
 
-    public MathPrettyPrinter(boolean internal, int spacing) {
+    public MathPrettyPrinter(int spacing, boolean internal) {
         this.printer = new IndentPrinter();
         this.printer.setIndentLength(spacing);
         this.importVisited = false;
@@ -37,24 +37,25 @@ public class MathPrettyPrinter implements AstPrettyPrinter<ASTMathCompilationUni
         this.internal = internal;
     }
 
-    public MathPrettyPrinter(boolean internal)
-    {
-        this(internal, 4);
+    public MathPrettyPrinter(int spacing) {
+        this(spacing, false);
     }
 
-    public MathPrettyPrinter()
-    {
-        this(false,4);
+    public MathPrettyPrinter() {
+        this(4,false);
+    }
+
+    public void setInternal(boolean internal) {
+        this.internal = internal;
     }
 
     @Override
     public String prettyPrint(ASTMathCompilationUnit node) {
         this.printer.clearBuffer();
 
-        if(internal) {
+        if(this.internal) {
             this.printStatements(node);
-        }
-        else {
+        } else {
             this.handle(node);
         }
 
@@ -68,8 +69,7 @@ public class MathPrettyPrinter implements AstPrettyPrinter<ASTMathCompilationUni
         return this.printer.getContent();
     }
 
-    protected void printStatements(ASTMathCompilationUnit node)
-    {
+    protected void printStatements(ASTMathCompilationUnit node) {
         List<ASTStatement> statements = node.getMathScript().getStatementsList();
 
         for(ASTStatement statement: statements)

src/test/java/de/monticore/lang/monticar/mpp/models/StatementsOnlyTest.java

@@ -14,14 +14,14 @@ public class StatementsOnlyTest extends AbstractModelTest {
     @Ignore
     public void printTest3() throws IOException
     {
-        this.printer = new MathPrettyPrinter(true);
+        this.printer = new MathPrettyPrinter(4, true);
         System.out.println(printVanillaModel("Nested.m"));
     }
 
     @Test
     public void testModel3() throws IOException
     {
-        this.printer = new MathPrettyPrinter(true);
+        this.printer = new MathPrettyPrinter(4, true);
         String actual = printVanillaModel("Nested.m");
         String expected =
                 "Q sum = 1;\n" +