calculateIdMD5.cc

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#include <iostream>
#include <TSystem.h>

#include "FWCore/FWLite/interface/FWLiteEnabler.h"
#include "FWCore/Utilities/interface/Exception.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ParameterSetReader/interface/ParameterSetReader.h"

#include <openssl/md5.h>

using namespace std;

int main ( int argc, char ** argv )
{

  // load framework libraries
  gSystem->Load( "libFWCoreFWLite" );
  FWLiteEnabler::enable();

  if ( argc < 3 ) {
    std::cout << "Usage : " << argv[0] 
          << " [your_cutflow_only.py] " 
          << "[cutflow_name] "<< std::endl;
    return 0;
  }

  if( !edm::readPSetsFrom(argv[1])->existsAs<edm::ParameterSet>(argv[2]) ){
    std::cout << " ERROR: ParametersSet '"<< argv[2] 
          << "' is missing in your configuration file" 
          << std::endl; exit(0);
  }
  
  edm::ParameterSet conf = edm::readPSetsFrom(argv[1])->getParameterSet(argv[2]);
  edm::ParameterSet trackedconf = conf.trackedPart();
  
  std::string tracked(trackedconf.dump()), untracked(conf.dump());  

  if ( tracked != untracked ) {
    throw cms::Exception("InvalidConfiguration")
      << "IDs are not allowed to have untracked parameters"
      << " in the configuration ParameterSet!";
  }

  // now setup the md5 and cute accessor functions
  unsigned char id_md5_[MD5_DIGEST_LENGTH];
  memset(id_md5_,0,MD5_DIGEST_LENGTH*sizeof(unsigned char));
  MD5((const unsigned char*)tracked.c_str(), tracked.size(), id_md5_);
  printf("%s : ",argv[2]);
  for( unsigned i=0; i<MD5_DIGEST_LENGTH; ++i ){
    printf("%02x", id_md5_[i]);   
  }
  printf("\n");
  
  return 0;
}