add printing event # during task running (#108)

Co-authored-by: Oleksii Lubynets <lubynets@lxbuild07.gsi.de>

Author: lubynets

infra/TaskManager.cpp

@@ -97,6 +97,9 @@ void TaskManager::Run(long long nEvents) {
   }
 
   for (long long iEvent = 0; iEvent < nEvents; ++iEvent) {
+    if(verbosity_period_ > 0 && iEvent%verbosity_period_ == 0) {
+      std::cout << "Event no " << iEvent << "\n";
+    }
     if (read_in_tree_) {
       chain_->GetEntry(iEvent);
     }

infra/TaskManager.hpp

@@ -164,6 +164,7 @@ class TaskManager {
 
   void SetWriteMode(eBranchWriteMode mode) { write_mode_ = mode; }
   void SetBranchesExclude(std::vector<std::string> brex) { branches_exclude_ = std::move(brex); }
+  void SetVerbosityPeriod(int value) { verbosity_period_ = value; }
 
   void ClearTasks() { tasks_.clear(); }
 
@@ -187,6 +188,8 @@ class TaskManager {
   std::string out_file_name_{"analysis_tree.root"};
   std::vector<std::string> branches_exclude_{};
 
+  int verbosity_period_{-1};
+
   // configuration parameters
   eBranchWriteMode write_mode_{eBranchWriteMode::kCreateNewTree};
   bool is_init_{false};