//==============================================================
// This macro is intended to compile 'on the fly'
// all the classes for event reading and saving into the
// 'AliRsnEvent' format which is needed for analysis.
//
// Returns an integer error message if some compilation fails.
//==============================================================

Int_t setupPar(const char* pararchivename, Bool_t unzip=kTRUE) 
{
    ////////////////////
    // Setup PAR File //
    ////////////////////
    
    printf("\n\nSETUPING PAR %s\n\n",pararchivename);
    gSystem->Exec("g++ -v");
    printf("\n\n");

    if (pararchivename) {
        char processline[1024];
        sprintf(processline,".! tar xvzf %s.par",pararchivename);
        if (unzip) gROOT->ProcessLine(processline);
        const char* ocwd = gSystem->WorkingDirectory();
        gSystem->ChangeDirectory(pararchivename);
        
        // check for BUILD.sh and execute
        if (!gSystem->AccessPathName("PROOF-INF/BUILD.sh")) {
            printf("*******************************\n");
            printf("*** Building PAR archive    ***\n");
            printf("*******************************\n");
            if (gSystem->Exec("PROOF-INF/BUILD.sh")) {
                Error("runProcess","Cannot Build the PAR Archive! - Abort!");
                return -1;
            }
        }
        
        // check for SETUP.C and execute
        if (!gSystem->AccessPathName("PROOF-INF/SETUP.C")) {
            printf("*******************************\n");
            printf("*** Setup PAR archive       ***\n");
            printf("*******************************\n");
            gROOT->Macro("PROOF-INF/SETUP.C");
        }
        gSystem->ChangeDirectory("../");
    }
    
    return 1;
}