Resolve "Add detector name to results folder for benchmarks"

Closes #31 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_common_functions.h

@@ -3,6 +3,7 @@
 // M. Scott 05/2021
 //////////////////////////
 
+// Returns particle pdgID and mass in [GeV]
 std::tuple <int, double> extract_particle_parameters(std::string particle_name) {
     if (particle_name == "electron") return std::make_tuple(11,    0.51099895e-3);
     if (particle_name == "photon")   return std::make_tuple(22,    0.0);
@@ -15,4 +16,10 @@ std::tuple <int, double> extract_particle_parameters(std::string particle_name)
 
     std::cout << "wrong particle name" << std::endl;
     abort();
+}
+
+// Returns Environment Variables
+std::string getEnvVar( std::string const & key ){
+    char * val = getenv( key.c_str() );
+    return val == NULL ? std::string("") : std::string(val);
 }
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