Working MPI and non MPI HPO with new validation file option.

bin/tadah_cli.cpp

@@ -321,7 +321,7 @@ void TadahCLI::subcommand_hpo(
     }
     if (is_verbose()) std::cout << "Optimising HPs..." << std::endl;
     CLI::Timer timer_tot {"HPO", CLI::Timer::Big};
-    hpo_run(config, target_file); // TODO pass prediction file
+    hpo_run(config, target_file, validation_file);
     if (is_verbose()) std::cout << timer_tot.to_string() << std::endl;
   }
   else { // WORKER
@@ -367,7 +367,7 @@ void TadahCLI::subcommand_hpo(
 #else
   CLI::Timer timer_tot {"HPO", CLI::Timer::Big};
   if (is_verbose()) std::cout << "Optimising HPs..." << std::endl;
-  hpo_run(config, target_file);
+  hpo_run(config, target_file, validation_file);
   if (is_verbose()) std::cout << timer_tot.to_string() << std::endl;
 #endif