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Enable Alien hybrid config file fetching #15448

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Enable Alien hybrid config file fetching #15448

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22 changes: 21 additions & 1 deletion Generators/src/GeneratorHybrid.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
#include <tbb/parallel_for.h>
#include <CommonUtils/FileSystemUtils.h>
#include <filesystem>
#include "TGrid.h"

namespace o2
{
Expand All @@ -37,7 +38,26 @@ GeneratorHybrid::GeneratorHybrid(const std::string& inputgens)
setMomentumUnit(1.);
setEnergyUnit(1.);

if (!parseJSON(inputgens)) {
// Pull file from alien for dynamic configuration if needed
bool isAlien = false;
if (inputgens.starts_with("alien://")) {
if (!gGrid) {
TGrid::Connect("alien://");
if (!gGrid) {
LOG(fatal) << "AliEn connection failed, check token.";
exit(1);
}
}
TString aliencp = Form("alien_cp %s file:./%s",
inputgens.c_str(), "hybridAlien.json");
if (gSystem->Exec(aliencp.Data()) != 0) {
LOG(fatal) << "Error: Issues in fetching file" << inputgens;
exit(1);
}
isAlien = true;
}

if (!parseJSON(isAlien ? "hybridAlien.json" : inputgens)) {
LOG(fatal) << "Failed to parse JSON configuration from input generators";
exit(1);
}
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