catkin_make not installing new source

edit

• ROS: noetic
• Ubuntu 20.04 LTS server

I have modified the AddTwoInts service code as follows:

roscpp_tutorials/srv/TwoInts.srv

string launch
---
string check

roscpp_tutorials/add_two_ints_server/add_two_ints_server.cpp

#include "ros/ros.h"
#include "roscpp_tutorials/TwoInts.h"

bool add(roscpp_tutorials::TwoInts::Request  &req,
         roscpp_tutorials::TwoInts::Response &res )
{
  res.check = req.launch;
  ROS_INFO("request: launch=%s", (char*)req.launch.c_str());
  ROS_INFO("  sending back response: [%s]", (char*)res.check.c_str());
  return true;
}

int main(int argc, char **argv)
{
  ros::init(argc, argv, "add_two_ints_server");
  ros::NodeHandle n;

// %Tag(SERVICE_SERVER)%
  ros::ServiceServer service = n.advertiseService("add_two_ints", add);
    // %EndTag(SERVICE_SERVER)%

  ros::spin();

  return 0;
}

roscpp_tutorials/add_two_ints_client/add_two_ints_client.cpp

#include "ros/ros.h"
#include "roscpp_tutorials/TwoInts.h"
#include <cstdlib>

int main(int argc, char **argv)
{
  ros::init(argc, argv, "add_two_ints_client");
  if (argc != 3)
  {
    ROS_INFO("usage: add_two_ints_client '<package name> <launch file name>'");
    return 1;
  }

  ros::NodeHandle n;
  ros::ServiceClient client = n.serviceClient<roscpp_tutorials::TwoInts>("add_two_ints");
  roscpp_tutorials::TwoInts srv;
  srv.request.launch = atoi(argv[1]);
  if (client.call(srv))
  {
    ROS_INFO("Check: %s", (char*)srv.response.check.c_str());
  }
  else
  {
    ROS_ERROR("Failed to call service add_two_ints");
    return 1;
  }

  return 0;
}

If you haven't already worked it out I'm attempting to roslaunch a launch file from a service with roslibjs and rosbridge (I know the risks of service calls - just a test for now).

This builds as normal with catkin_make with no errors but even after deleting the build and devel folders the original code seems to still run? E.g. if I start the server with rosrun roscpp_tutorials add_two_ints_server, then run rosrun roscpp_tutorials add_two_ints_client "example string" it outputs "usage: rosrun add_two_ints_client X Y" instead of what I've changed it to, and errors when I pass in a string instead of an int64. Am I forgetting to change something here?

Should I clear the contents of /opt/ros/noetic/share? Really unsure what I'm doing wrong here if it builds properly, if its super simple I'm sure I'll kick myself.

Thanks

N.b if you'd like to look at original source its here