runMassFitter: add main() function and missing header

Author: lubynets

PWGHF/D2H/Macros/runMassFitter.C

@@ -22,6 +22,11 @@
 #include "HFInvMassFitter.h"
 
 // if .h file not found, please include your local rapidjson/document.h and rapidjson/filereadstream.h here
+#include <TCanvas.h>
+#include <TDatabasePDG.h>
+#include <TFile.h>
+#include <TH2F.h>
+
 #include <rapidjson/document.h>
 #include <rapidjson/filereadstream.h>
 
@@ -30,10 +35,6 @@
 #include <string> // std::string
 #include <vector> // std::vector
 
-#include <TDatabasePDG.h>
-#include <TFile.h>
-#include <TH2F.h>
-
 #endif
 
 using namespace rapidjson;
@@ -672,3 +673,16 @@ void divideCanvas(TCanvas* canvas, int nSliceVarBins)
     }
   }
 }
+
+int main(int argc, char* argv[])
+{
+  if (argc < 2) {
+    throw std::runtime_error("Not enough arguments. Please use\n./runMassFitter configFileName");
+  }
+
+  const std::string configFileName = argv[1];
+
+  runMassFitter(configFileName);
+
+  return 0;
+}