perseus_sensors(m2m2_lidar): Added nlohmann and openSSL libraries

Add two required libraries the package nix overlay and adjusted the CMakeLists file.
Due to needing both openssl::crypto and openssl::ssl had to add an explicit target_link_libraries to CMakeLists.txt

software/ros_ws/nix-packages/perseus-sensors.nix

@@ -6,6 +6,8 @@
   backward-ros,
   rclcpp,
   sensor-msgs,
+  nlohmann_json,
+  openssl,
 }:
 buildRosPackage rec {
   pname = "ros-jazzy-perseus-sensors";
@@ -14,7 +16,11 @@ buildRosPackage rec {
   src = ./../src/perseus_sensors;
 
   buildType = "ament_cmake";
-  buildInputs = [ ament-cmake ];
+  buildInputs = [
+    ament-cmake
+    nlohmann_json
+    openssl
+  ];
   propagatedBuildInputs = [
     backward-ros
     rclcpp

software/ros_ws/src/perseus_sensors/CMakeLists.txt

@@ -41,7 +41,8 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 # INCLUDE DEPENDENCIES
 
 # public dependencies (which should propagate)
-set(THIS_PACKAGE_INCLUDE_DEPENDS rclcpp sensor_msgs std_msgs OpenSSL)
+set(THIS_PACKAGE_INCLUDE_DEPENDS rclcpp sensor_msgs std_msgs OpenSSL
+                                 nlohmann_json)
 # packages which must be present but aren't linked against
 set(THIS_PACKAGE_BUILD_DEPENDS backward_ros ament_cmake)
 
@@ -66,6 +67,12 @@ target_include_directories(
 
 ament_target_dependencies(m2m2_lidar PUBLIC ${THIS_PACKAGE_INCLUDE_DEPENDS})
 
+# OpenSSL has two libraries that need to linked against explicitly
+target_link_libraries(
+  m2m2_lidar
+  PRIVATE OpenSSL::SSL OpenSSL::Crypto nlohmann_json::nlohmann_json
+          ${rclcpp_LIBRARIES} ${sensor_msgs_LIBRARIES} ${std_msgs_LIBRARIES})
+
 # INSTALL (ROS Executables)
 install(TARGETS m2m2_lidar DESTINATION lib/${PROJECT_NAME})