Move struct_msgs package check to viewmodel creation, enable find_package(struct_msgs) for ros2

src/main/java/de/monticore/lang/monticar/generator/roscpp/GeneratorRosCpp.java

@@ -69,7 +69,7 @@ public class GeneratorRosCpp {
     private List<FileContent> generateRosAdapter(EMAComponentInstanceSymbol component) {
         List<FileContent> res = new ArrayList<>();
 
-        if (TagHelper.rosConnectionsValid(component)) {
+        if (TagHelper.rosConnectionsValid(component, ros2Mode)) {
             List<EMAPortSymbol> rosPorts = component.getPortInstanceList().stream()
                     .filter(EMAPortSymbol::isRosPort)
                     .collect(Collectors.toList());
@@ -122,6 +122,8 @@ public class GeneratorRosCpp {
                 .map(RosConnectionSymbol::getTopicType)
                 .map(Optional::get)
                 .map(n -> n.split("/")[0])
+                //dont add struct_msgs if we are in ros1 mode
+                .filter(s -> ros2Mode || !s.equals("struct_msgs"))
                 .forEach(allPackages::add);
 
         allPackages.forEach(model::addPackage);

src/main/resources/de/monticore/lang/monticar/generator/roscpp/template/CMakeLists.ftl

@@ -4,9 +4,7 @@ set (CMAKE_CXX_STANDARD 14)
 set (AMENT_CMAKE_UNINSTALL_TARGET FALSE)
 
 <#list model.getPackages() as pack>
-    <#if pack != "struct_msgs">
 find_package(${pack} REQUIRED)
-    </#if>
 </#list>
 
 add_library(${model.name} ${model.name}.cpp)