[LLVM Analyzer][Generators] Cleanup LLVM analyzer warnings

Author: iarspider

GeneratorInterface/EvtGenInterface/plugins/DataCardFileWriter.cc

@@ -11,7 +11,9 @@ using namespace gen;
 
 DataCardFileWriter::DataCardFileWriter(const edm::ParameterSet& pset) {
   std::string FileName = pset.getParameter<std::string>("FileName");
-  std::string Base = std::getenv("CMSSW_BASE");
+  char* tmp = std::getenv("CMSSW_BASE");
+  assert(tmp);
+  std::string Base(tmp);
   Base += "/src/";
   std::cout << "Writting file:" << Base + FileName << std::endl;
   std::ofstream outputFile(Base + FileName);

GeneratorInterface/EvtGenInterface/plugins/EvtGen/EvtGenInterface.cc

@@ -301,13 +301,16 @@ void EvtGenInterface::init() {
   //Setup evtGen following instructions on http://evtgen.warwick.ac.uk/docs/external/
   bool convertPythiaCodes = fPSet->getUntrackedParameter<bool>(
       "convertPythiaCodes", true);  // Specify if we want to use Pythia 6 physics codes for decays
-  std::string pythiaDir =
+  char* tmp =
       std::getenv("PYTHIA8DATA");  // Specify the pythia xml data directory to use the default PYTHIA8DATA location
-  if (pythiaDir.empty()) {
+
+  if (tmp == nullptr) {
     edm::LogError("EvtGenInterface::~EvtGenInterface")
         << "EvtGenInterface::init() PYTHIA8DATA not defined. Terminating program ";
     exit(0);
   }
+
+  std::string pythiaDir(tmp);
   std::string photonType("gamma");  // Specify the photon type for Photos
   bool useEvtGenRandom(true);       // Specify if we want to use the EvtGen random number engine for these generators
 

GeneratorInterface/RivetInterface/plugins/RivetAnalyzer.cc

@@ -54,6 +54,9 @@ void RivetAnalyzer::beginJob() {
   //set the environment, very ugly but rivet is monolithic when it comes to paths
   char* cmsswbase = std::getenv("CMSSW_BASE");
   char* cmsswrelease = std::getenv("CMSSW_RELEASE_BASE");
+  // These should never fail
+  assert(cmsswbase);
+  assert(cmsswrelease);
   if (!std::getenv("RIVET_REF_PATH")) {
     const std::string rivetref = string(cmsswbase) +
                                  "/src/GeneratorInterface/RivetInterface/data:" + string(cmsswrelease) +